JP2003143063A - Mobile communication device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect the ID. No. and the position of a mobile, using infrared rays. SOLUTION: The mobile communication device is composed of an infrared device installed outside the mobile, an infrared signal receiver installed on the mobile, a wave/infrared signal generator started thereby, and a wave/ infrared signal receiver installed outside the mobile.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an ID No. of a mobile unit. And a device for detecting the position from a distance.

[0002]

2. Description of the Related Art Conventionally, a microwave has been used to detect a moving body from a distance of about 5 to 10 m. The above object has been achieved by using a device for transmitting and receiving microwaves and a microwave tag attached to a moving body.

[0003]

When an apparatus using a conventional microwave is used for an outdoor automobile, the microwave is absorbed by water under heavy rain or heavy fog, and therefore the accessible distance is 1 / There was a problem of becoming 3 to 1/10. Further, if there is a large truck in front of the target vehicle, there is a problem that microwaves are scattered by the large truck and radiated to the adjacent lane. Also, from the microwave transmitter installed directly above one lane where the car passes,
There was also a problem that microwaves leaked to and interfered with the microwave receiver installed directly above the adjacent lane.

An object of the present invention is to provide a position detecting device for a moving body or a person, which solves the above problems.

[0005]

[Means for Solving the Problems] In order to achieve the above object,
In the present invention, a burst signal of an infrared light signal (a burst wave signal including a rectangular wave or a digital signal) is generated using a signal generator including an infrared light signal generator.

The above signal is received by the infrared light signal receiving device mounted on the moving body. The start of the burst signal is detected, an electric signal indicating the detection is made, and the radio signal generator is turned on and off in synchronization with this electric signal.
Then, only when it is ON, the data using the radio signal as a carrier is transmitted. This data is received by a radio wave signal receiving device provided outside the moving body.

Here, each of the infrared rays is radiated toward the vehicle from immediately above the lane adjacent to one lane. At this time, when the infrared light is radiated to one lane, the adjacent lane is If the infrared lights are emitted so that they are in opposite phases to each other so that they do not emit, when the car in the one lane is returning data by the radio wave transmitter, the car in the adjacent lane will be Since the data are alternately returned in a time-division manner instead of returning, the reply between lanes can be separated without interference even if reply radio waves of the same frequency are used.

It is obvious that an infrared light signal transmitting device can be provided instead of the radio wave signal transmitting device, and it is possible to similarly perform transmission and reception.

[0009]

In the mobile communication device configured as described above, when the infrared light signal is pouring on the car in one lane,
The signal does not fall into the adjacent lane, and this relationship is alternated in a time-divisional manner, so when there is a reply radio signal from a vehicle in one lane as described above, Since no reply signal is output from the car, and there is no interference between reply radio signal signals, the reply between lanes is separated.

The above operation is based on the fact that the infrared light is pouring on the lanes almost alternately and alternately, and the radio wave signal transmitting device mounted on the moving body is alternated in synchronization with the above signals. It is based on the fact that it is returning radio waves.

[0011]

EXAMPLES Examples will be described with reference to the drawings. FIG. 1 shows one embodiment. Numbers 1 and 2 are infrared light signal transmitters for adjacent lanes, and 3 and 4 are tags in adjacent lanes, respectively, where the tags are attached. The moving body or person to be shown is not shown. Number 5 is a gate equipped with the transmitters shown in numbers 1 and 2, and number 6 is the ground. Numbers 7 and 8 indicate infrared light falling on each lane.

FIG. 2 is a timing chart of the embodiment shown in FIG. Numbers 7a and 8a show the signal waveforms of the infrared light signals 7 and 8 of FIG. 1, respectively.

Reference numeral 9 is a rectangular wave obtained by shaping the sine wave of the commercial power source, and its half cycle is 10 when the commercial power source is 50 Hz.
At ms and 60 Hz, it is about 8.3 ms. Number 10 is a diagram showing the zero crossing point of the sine wave of the commercial power source, and number 1
The arrows indicated by 1, 12, 13, 14, 15, etc. indicate the zero cross points. A burst wave 7a is generated when the rectangular wave 9 is HIGH, and a burst wave 8a is generated when the rectangular wave 9 is LOW.
Can occur.

The waveform of the burst wave 7a may be a simple rectangular wave or a burst wave of a digital signal wave containing digital data.

Although the example of FIG. 1 has been described for the case of two lanes, for example, even in the case of 10 lanes, the signal relationship between adjacent lanes should be such as shown in FIGS. It is also possible to do so, and in this case, it was confirmed that the returned radio waves are generated at the same time in every other lane, but since they are not adjacent to each other and are apart from each other, interference does not occur.

Although a car has been described above, it is obvious that the same thing can be said when a person, not a car, passes by holding the tags 3 and 4 shown in FIG. Even when a large number of people pass through a fixed passage under a wide gate, the return radio waves generated from the tags owned by each person can be detected in a time division manner. If the returned radio waves were weakened, the returned radio waves could be received without interference even if the gate height was 4 to 5 m and the distance between adjacent passages was 50 cm. Similar operation can be obtained by returning signals from the tags 3 and 4 using an infrared light signal generator instead of the returning radio wave.

FIG. 3 shows an internal block diagram of the infrared light signal generator shown by numeral 1 in FIG. The electrical signal generated by the signal generator 1a is input to the AND gate and an amplifier 1b. Reference numeral 1e is a signal generator for generating the rectangular wave 9 in FIG. 1, which shapes the sine wave of a commercial power supply (not shown).
A rectangular wave 9 is generated. Signal generator 1a and signal generator 1e
The signal from is input to 1b, which represents an AND gate and an amplifier. As a result, the electric signal generated from the signal generator 1a is supplied to the infrared LED 1c only when the rectangular wave 9 is HIGH, and the infrared light signal 1d is emitted. The internal block diagram of the infrared light signal generator shown by number 2 in FIG. 1 is also similar. However, the difference is that the infrared light signal is emitted only when the rectangular wave 9 is LOW.

Here, the waveform of the infrared light signal shown in 1d of FIG. 3 is the same as the waveform of the signal 7a of FIG. 2, and the waveform of the infrared light signal 8 generated from the signal generator shown in FIG. Figure 2
The waveform is the same as that of the signal 8a.

Further, it is obvious that a clock (not shown) may be provided in place of the signal generator indicated by reference numeral 1e in FIG. 3 so that the output waveform of the clock counter (not shown) may be the same as that of the rectangular wave 9. .

Further, in place of the signal generator indicated by reference numeral 1e in FIG. 3, it is obvious that a real-time clock (not shown) may be provided and the rectangular wave 9 may be set to HIGH when the time of the real-time clock is within a certain range. . At this time, it is obvious that the infrared light signal generators 1 and 2 can be synchronized with each other even if the infrared light signal transmitters 1 and 2 in FIG. There is an advantage that a communication function for synchronization may not be provided between No. 2 and No. 2. If the waveform of the signal 9 generated from the signal generator 1e shown in FIG. 3 is not a rectangular wave but only a HIGH signal, the infrared light signal 1d is no longer a burst waveform and the signal generator 1
Obviously, such an embodiment is also possible, since there is only a continuous waveform of the signal originating from a.

Reference numeral 3 in FIG. 4 shows the tag 3 shown in FIG. 1 and its internal block diagram. The number 1d indicates the same infrared light signal as the number 1d in FIG. Its waveform is the same as the signal 7a in FIG. The infrared light signal received by the infrared light signal receiver 3a is sent to the one-shot multivibrator 3b, and a signal similar to the signal 9 in FIG. 2 is generated from 3b, which is sent to the one-shot multivibrator 3c. From 3c, a pulse indicating the rising edge of the signal 9 in FIG. 2 is generated,
This resets the counter 3d. A clock is supplied from the clock generator 3e to the counter 3d, and a signal 3f is generated in synchronization with this clock. The waveform of the signal 3f is almost the same as the waveform of the signal 9 of FIG. When the signal 3f is HIGH, the radio signal generator 3g is enabled. A data signal 3i such as ID data related to the tag 3 is supplied from the data generator 3h to the radio wave signal generator 3g, and a radio wave signal 3j having a constant frequency modulated by the data 3i as a carrier is radiated to be a return radio wave. . This return radio wave 3j is received and demodulated by a fixed publicly known radio wave signal receiving device (not shown), and the original data 3i is taken out. What has been described with respect to the tag 3 in FIG. 1 also applies to the tag 4.

The infrared light signal receiving device indicated by reference numeral 3a in FIG. 4 is a device including a photodiode, a phototransistor or a solar cell and an AC amplifier.

The number 16 in FIG. 5 is a tag similar to the tag 3 in FIG. 4, and is an internal block diagram showing another structure. The infrared light signal 1d is the same as that shown in FIG. The infrared light signal receiving device 16a is the same as that shown by the number 3a in FIG. The waveform of the signal 16b generated by the device 16a is similar to the signal 9 of FIG. 2 and is sent to the microprocessor (MPU) 16c. Microprocessor 16
A signal 16d, which is almost the same as the signal 9 in FIG. 2, is generated from c,
When this is HIGH, the radio signal generator 16e similar to the number 3g in FIG. 4 is enabled. Data 16 at the same time
f is also sent to the radio signal generator 16e, and the return radio wave 3j modulated by the data 16f is radiated from the radio signal generator 16e with one frequency as a carrier. Here, number 3 in FIG.
g, the radio signal generator indicated by reference numeral 16e in FIG. 5 can be replaced with an infrared light signal generator to obtain the same effect. At this time, the infrared light signal receiving device (not shown) fixed outside the moving body receives the light and demodulates it to the original data.

Further, the signal 1d in FIG. 5 is replaced with the signal 7 in FIG.
It is also possible to use infrared modulated light that has the same burst period as a and is modulated with the burst waveform of the data signal. At this time, the waveform of the signal 16b becomes the same as the burst waveform of the data signal of the data signal. Then, the microprocessor 16c, to which the signal 16b is input, generates a signal 16d which is substantially the same as the signal 9 of FIG. 2 and a data signal 16f including the data unique to the tag 16 and the received data signal 16b. Obviously it could be firmware. Radio signal 3j is signal 16
It is a radio wave signal modulated by f. By doing so, data unique to the infrared light signal generator is written in the tag 16 that has passed through the infrared light irradiation area of the specific infrared light signal generator, so that the ID of the tag 16 and the pass The history will be reflected in the data signal 16f.

Further, if the infrared light signal generators 1 and 2 shown in FIG. 2 are used to narrow the directivity angle of infrared light by a cylinder, it is obvious that signal separation between adjacent lanes can be performed at narrower intervals.

Instead of the burst signals 7a and 8a shown in FIG. 2, a continuous rectangular wave or sine wave or a data signal may be used. At this time, no separation is made between adjacent lanes.

In FIG. 9, light emitting devices 24a, 24b and 24l installed on the ceiling in another embodiment are infrared LEDs or infrared laser diodes. The infrared rays 25a, 25b and 25l are infrared rays emitted from the light emitting devices 24a, 24b and 24l, respectively.

Now, after the light emitting device 24a generates only one burst infrared light signal 25a such as the signal 7a in FIG. 2, the generation is stopped. At this time, tag 3 similar to tag 3 in FIG.
Receives the burst infrared light signal 25a, and the tag 3
The signal 9 in FIG. 2 generated inside the signal becomes HIGH and returns to LOW after the burst is stopped. If the radio signal is generated from the tag 3 only when the signal 9 is HIGH,
By receiving this radio wave signal with a radio wave signal receiving device (not shown) outside the tag 3, it is possible to know that the tag 3 exists within the light beam 25a. That is, the position of the tag 3 can be detected.

Similarly, by scanning the light emitting devices 24b to 24l one after another, the position of the tag 4 can be detected, so that each position can be detected even if there are a plurality of tags. Here, the light emitting devices 24b to 24l and the light beam 25
The numbers between b and 25l are omitted. Number 6
Is the floor.

FIG. 6 shows the power supply status of the tag 3 shown in FIGS. Reference numeral 17 indicates the tag and its internal block diagram. The infrared light 1d is received by the infrared light receiving device 17a, and the signal 17b is transmitted to the other device 17f in the tag.
Sent to. On the other hand, the signal 17b is sent to a publicly known rectifier circuit 17c and converted into a DC signal 17d, which is used as a control signal to turn on the analog switch 17e to turn on the battery 17b.
The electric power of g is supplied to the other device 17f through the power supply line 17h. Therefore, the analog switch 17e is off until the signal 1d is received, so that the power consumption of the battery 17g can be reduced. The battery 17g may be a battery mounted inside the tag 17, or may be replaced with the battery 17g by removing the battery 17g and supplying power from a power source attached to the moving body (not shown) for mounting the tag 17.

Power is constantly supplied from the battery 17g in the tag to the infrared light receiving device 17a through the power supply line 17i, but when the device 17a includes a CMOS high input impedance amplifier, the idling power supply current of the amplifier is four.
It is known that it can be set to about μA, and the life of the battery 17g can be remarkably extended.

When the device 17a is an unbiased photodiode or solar cell and a CMOS high input impedance amplifier, the power supply current need only be supplied to the CMOS high input impedance amplifier, and the idling current is still about 4 μA. .

FIG. 7 shows an example of an internal block diagram of the receiving device 17a shown in FIG. Number 18 indicates a reverse biased photodiode or solar cell, number 19 indicates a CMOS high input impedance amplifier, and number 20 is a resistor. The signal 17b is a signal related to the optical signal 1d, and only this AC component is taken out through a band pass filter (not shown). In this way, it is possible to extract a signal related to only the optical signal 1d without being affected by sunlight or the like. 1
7i is a power supply line.

FIG. 8 is a block diagram of another structure showing the inside of the tag 17 of FIG. The power from the battery 17g is supplied to the ultra low power consumption infrared light signal receiving device 21a and the microprocessor (MPU) 22 as power source currents 17i and 17j.
Powered by. Here, the current 17i is 4 μA when the battery 17g is 3 V, and the current 17j is 0.1 μA when the MPU 22 is in the sleep mode. As a result, battery consumption due to the currents 17i and 17j is negligibly small.

The power supply current 17k of the high-sensitivity infrared light signal receiving device 21c is 1 to 2 mA, and the power supply current 17h to the radio signal generating device 23 is about 25 mA. Therefore, the power supply current is normally supplied by the switching element 17e. It is shut off.

When the infrared light signal 4d is input from the outside, the pulse signal 21b is first generated from the ultra low power consumption infrared light receiving device 21a. The MPU 22 detects the falling edge or rising edge of the pulse signal 21b, exits the sleep mode, and enters the operation mode. M in operation mode
The PU 22 activates the signal 22a to turn on the switching element 17e, and the power supply current 17h, 1
Supply 7k. As a result, the highly sensitive infrared light receiving device 21c
Becomes active, receives an infrared light command signal from the infrared light 1d, and generates a signal 21d.

The signal 21d is input to the MPU 22 and input to the MPU.
22 interprets the command, generates a signal 22b according to the content of the command, and when the signal 22b is sent to the radio signal generator 23 which is also active, a radio signal 3j modulated by a signal including the signal 22b is generated. To do.
Instead of the radio wave signal generation device 23, an external light signal generation device using an LED may be substituted, and at this time, the signal 3j becomes infrared light.

Further, depending on the content of the command of the signal 21d, the data contained in the infrared light signal 1d can be written in the nonvolatile memory in the MPU 22.

The purpose of the configuration shown in FIG. 8 is as follows.
That is, since the ultra low power consumption infrared light signal receiving device 21a consumes less current, the amplification capability of the infrared light signal 1d is inferior to that of the high sensitivity infrared light receiving device 21c.
d, that is, the waveform of weak infrared light 1d cannot be faithfully amplified and signal 2
1b has a pulse-like waveform with a deformed shape.

At the falling or rising edge of the pulse-like waveform 21b, the MPU 22 is changed from the sleep mode to the operation mode to activate the signal 22a, and the switching element 17e is turned on to turn on the high-sensitivity infrared light receiving device 21c.
To activate infrared light 1d and receive infrared light 1d
Is faithfully amplified and detected, an accurate signal 21d related to the signal waveform of the infrared light 1d is taken out, input to the MPU 22, and the command of the signal 21d is interpreted by the MPU 22.

At this time, the power supply current 17k is 1 to 2 mA, but when the command interpretation is completed, the signal 22a is made inactive again, so that the power supply current 17k becomes zero and the battery consumption thereafter becomes minute. The same applies to the power supply current 17h. It is obvious that another one similar to the switching element 17e may be provided to control the power supply currents 17h and 17k separately.

FIG. 10 is a block diagram of an embodiment different from FIG. 8 showing the inside of the infrared light signal receiving device 17 of FIG. In FIG. 10, the same numbers as in FIG. 8 indicate the same items. The difference from FIG. 8 is that the MPU 22d is provided in addition to the MPU 22, and both are in the sleep mode when waiting for the infrared light command 1d. The infrared light command 1d is the light receiving device 21a.
When input to the MPU 22, the MPU 22 shifts from the sleep mode to the operation mode, activates the signal 22f to turn on the switching element 17e to supply the power supply current 17k to the light receiving device 21c, and the infrared light command signal 21d outputs the MPU2.
2 is input and interpreted.

Next, the MPU 22 sends the signal 22c to the MPU 22.
Then, the MPU 22d shifts from the sleep mode to the operation mode. The data 22g registered in advance in the non-volatile memory in the MPU 22d is sent to the radio signal generator 23 through the OR circuit 22e and radiated as the radio signal 3j. At this time, the signal 22b is LOW. 2 MPU
For the purpose of providing the individual pieces, for example, the transmission of the ID data 22g is left exclusively to the MPU 22d, and the MPU 22 monitors only the command signal 21d from the light receiving device 21c, and the command signal 21
Various operations, for example, the data included in the signal 21d can be written in the nonvolatile memory in the MPU 22 according to the content of d.

Therefore, the MPU 22d can continue the transmission of the data 22g without interruption even while writing to the nonvolatile memory in the MPU 22. Therefore,
When the read / write type data carrier is constructed in the above embodiment, the data 22d can be simultaneously written while the data 21d is written to the data carrier, and the operation time of the data carrier can be shortened.

When the MPU 22 activates the signal 22a, the radio signal generator 23 becomes active as in FIG. Alternatively, when the signal 22g from the MPU 22d is LOW, the signal 22b from the MPU 22 may be sent to the radio signal generator 23 through the OR circuit 22e and become the radio signal 3j.

FIG. 11 is a block diagram showing the inside of the ultra low power consumption light receiving device 21a shown in FIGS. Bias-free mode (photo-voltaic mode)
The infrared light signal 1d is input to the photodiode 26 which is set to. The waveform of the infrared light signal is, for example, a signal obtained by modulating 30 kHz modulated light with data. 30k when logic 0
It is obvious that the signal generator 1a of the infrared light signal generator 1 of FIG. 3 can be configured so that the modulated light of Hz is generated and the modulated light of 30 kHz is not generated when the logic is 1.

Therefore, the photocurrent 27a generated from the anode of the photodiode 26 returns to the earth 37 through the simulated inductor 27, and the photodiode 26
Returning to the cathode of, the AC component in the photocurrent 27a is
When flowing into the simulated inductor 27, the terminal voltage V of the simulated inductor 27 becomes | V | = 2π
It becomes a large voltage according to fLI. f is the frequency of the AC component, L is the inductance of the simulated inductor 27, and I is the magnitude of the AC component of the photocurrent 27a. As a result, even a weak infrared light signal 1d from a distance can be amplified.

Infrared light 1 incident on the photodiode 26
When d includes direct-current light such as sunlight and infrared light modulated at low frequency such as electric light, these low-frequency and direct-current infrared light are
A large voltage does not appear at the terminals of the simulated inductor 27, but a small voltage slightly determined by the DC resistance of the simulated inductor 27 appears at both ends of the simulated inductor 27.

Therefore, only the high frequency component of the infrared light 1d received by the photodiode 26 becomes a large voltage and appears at both ends of the simulated inductor 27, so that the infrared light signal (high frequency component) and the disturbance light ( The simulated inductor 27 can separate sunlight (light and electric light) with high sensitivity. The current of the high frequency component of the infrared light signal appearing at both ends of the simulated inductor 27 is the capacitor 2
8 and flows from the base of the transistor 30 to the emitter. When the battery 17g is 3V and the resistance 29 is 200MΩ,
Since the impedance between the base and the emitter of the transistor 30 is about 40 MΩ, it is sufficiently higher than the impedance of the simulated inductor 27, and the presence of the transistor 30 does not significantly attenuate the high frequency signal.

On the other hand, when the direct current light component such as sunlight is strong, only the direct current resistance of the simulated inductor 27 becomes a load of the unbiased photodiode 26 for the direct current light component. There is an experimental result that the photodiode 26 is less likely to be saturated with DC light when the DC resistance is lower than a certain value. The collector voltage of the transistor 30 passes through the capacitor 32 and C
The signal is input to the MOS NAND gate 35 and becomes the signal 21b. This signal 21b is input to the MPU 22 shown in FIGS. Resistor 31 is 3MΩ, resistors 33 and 34 are 10MΩ
In the case of Ω, the current 36 flowing out from the battery 17g was 4 μA when there was no signal. Therefore, if only the standby state continues,
The life of the battery 17g of 1000 mA · h is 14 years even if the remaining amount of the battery 17g is stopped at 500 mA · h, and the battery consumption can be ignored.

FIG. 12 shows another embodiment showing the inside of the light receiving device 21a shown in FIGS. 8 and 10. The infrared light signal 1d incident on the unbiased photodiode 26 is amplified by the ultralow current consumption operational amplifier 38. For example, the signal 21b is passed through the bandpass filter 39 passing only 30 kHz and the waveform shaping circuit 40 to be input to the MPU. Battery 17
The current 41 flowing out from g was also 4 μA. The load resistance of the photodiode 26 is shown at 38a. Thus, the resistor 38a may be used instead of the simulated inductor. At this time, a simulated inductor is used, and the sensitivity of receiving an infrared light signal is smaller than that when it is used, but this is also included in the examples.

FIG. 13 is a block diagram showing the inside of the high-sensitivity infrared light receiving device 21c shown in FIGS. Reverse bias mode (photo conductive mod)
When the infrared light signal 1d is input to the photodiode 26a connected to e), a current 41a flows from the battery 17g according to the amount of light. Therefore, the resistor 26 is input to the first stage amplifier 38.
A voltage corresponding to the product of b and the current 41a is generated, and then an amplified voltage 38a is generated, of which only the 30 kHz component, for example, passes through the bandpass filter 39 and becomes the signal 39a. The signal 39a is input to the detection circuit 40, 30 kHz of the modulated signal is removed, and the original '0', '1' (LO
It becomes the signal 40a which is the data of W, HIGH). Further, the signal 40a is waveform-shaped by the waveform shaping circuit 42,
The signal 21d is input to the MPU. The signal 21d is a data signal of "0" or "1" included in the original infrared light signal 1d.

The circuit shown in FIG. 13 has a high amplification factor and thus has high sensitivity. Therefore, the current 41 flowing out from the battery 17g is 1 to 2 mA. When the infrared light signal 1d contains strong direct current light such as sunlight, the photodiode 2
The current 41a flowing through 6a reaches several mA. This is an unavoidable phenomenon when using a photodiode in reverse bias mode.

Since the output signal 21b of FIGS. 11 and 12 is a signal amplified by a circuit of ultra-low current consumption, the infrared light signal 1d
The reproducibility of the waveform of the original data signal contained in is poor, and the signal 21b cannot faithfully reproduce the original '0' and '1' data signal waveforms. This becomes particularly remarkable when the infrared light signal 1d is weak, that is, when the infrared light signal is emitted from a distant place. However, since the signal 21b is a pulse signal having a pulse width close to the original "0" and "1" data signals, the signal 21b can be recognized by the MPU. That is, after switching the MPU from the sleep mode to the operation mode at the falling edge of the signal 21b,
The pulse width of the signal 21b may be measured by the MPU. In this way, noise with a narrow pulse width can be distinguished from the signal 21b.

When the signal 21b has a pulse width within a certain range, it is recognized that "0" or "1" data is input, the high-sensitivity light receiving device 21c is activated, and the infrared light signal 1d is detected.
The light receiving device 21c faithfully receives the waveform of the data signal included in the.

FIG. 14 illustrates the embodiment shown in FIG. 12 in more detail. The burst wave of the infrared light signal 1d incident on the non-biased photodiode 26 is amplified by the ultra low current consumption operational amplifier 38 to generate a signal 38a. This signal 38a is connected to the capacitor 38b and the resistor 38.
signal 38d after differentiation by a differentiation circuit composed of c
To generate. The differentiated signal 38d becomes the signal 38e via the buffer 43, and is integrated by the diode 38f, the resistor 38g, and the capacitor 38h, and the integrated signal 3
8i. The signal 38i after the integration becomes the signal 21b via the buffer 44 and is used as a signal input to the MPU 22 shown in FIGS. 8 and 10, or the switch 17i shown in FIG.
It is also used as a control signal 17b for controlling e.
When the signal 38a related to the infrared light signal 1d is a rectangular wave or a digital signal composed of '0' and '1', when differentiated, the rising edge of the rectangular wave causes a time constant of the capacitor 38d and the resistor 38c. A pulse having a determined pulse width is generated, and this becomes the signal 38d after differentiation.

When a noise having a pulse width narrower than the predetermined signal comes, the pulse crest value of the pulse signal 38d after differentiation becomes small, and the signal 38e does not occur when the pulse crest value is smaller than the threshold of the buffer 43. On the contrary, if a hum having a pulse width that is too wide comes, the generation period of the pulse signal 38d after differentiation becomes long, and sufficient charge is not stored in the capacitor 28h of the integrating circuit. This makes it possible to separate predetermined signals from noise and hum. Number 27 is simulated
It is an inductor. Further, in FIG. 14, the electric signal amplifier 38 and the differentiating circuit (38b and 38c) are removed, and a publicly known active bandpass filter is used instead to amplify the electric signal related to the received infrared light 1d, It is clear that the signal 21b can be obtained. This is shown in FIG. Reference numeral 27c is an active bandpass filter, which is a VCVS bandpass filter,
The bandpass filter 27c can be configured by at least one bandpass filter among an infinite gain / multi-feedback bandpass filter, a positive feedback bandpass filter, and other known bandpass filters. 20, the same numbers as those in FIG. 14 indicate the same items.

FIG. 15 shows the internal circuit of the simulated inductor 27 shown in FIGS. Operational amplifier 4
The size of the inductance L of a known simulated inductor composed of 5, resistor 46, resistor 47, and capacitor 48 is L = R0.Rs.C0, and the equivalent series resistance is r = R0 + Rs. Here, R0 is the value of the resistor 46, Rs is the value of the resistor 47, and C0 is the value of the capacitor 48. Inductance appears between the terminals 49 and 50. Vcc represents a positive power supply of the operational amplifier, and Vee represents a negative power supply of the operational amplifier 45. Vee may also be at the same potential as ground. At this time, it becomes a unipolar simulated inductor.

FIG. 16 shows the simulation shown in FIG. 11 and FIG.
9 shows another embodiment of the internal circuit of the Ted inductor 27. Numbers 52, 53 and 54 are all indicated by 55 for a resistor and a capacitor and 51 for an operational amplifier. The inductance L between terminals 56 and 57 is L = R0.Rs.C0 and the equivalent series resistance is r = Rs. Rs is the resistance 52,
R0 indicates the value of the resistor 54, and C0 indicates the value of the capacitor 55.
Vcc represents the positive power supply of the operational amplifier, and Vee represents the negative power supply of the operational amplifier. Vee may also be at the same potential as ground. At this time, it becomes a unipolar simulated inductor. In addition, the simulated inductor using the operational amplifier is not limited to the positive phase amplifier as shown in FIGS. 15 and 16, but also a large number of simulated inductors such as a negative phase amplifier and a Miller integrating circuit. Since there is an inductor, any of these known simulated inductors may be used.

FIG. 17 shows the simulation shown in FIG. 11 and FIG.
9 shows another embodiment of the internal circuit of the Ted inductor 27. The number 58 is an N-channel FET, and the numbers 59 and 6
Reference numerals 1 and 63 are capacitors, and reference numerals 60 and 62 are resistors. The bias voltage of the FET 58 is supplied from the terminal 64. The inductance L between the terminals 65 and 66 is L = (C
0 · R0) / gm, equivalent series resistance r = 1 / gm. Here, C0 is the value of the capacitor 61, and R0 is the value of the resistor 60. gm is the gm of the FET 58. The capacitor 59 is a DC blocking capacitor, the capacitor 63 is a capacitor for smoothing the bias voltage supplied from the terminal 64, and the resistor 62 is a resistor sufficiently larger than the resistor 60. This is also a known simulated inductor, but the terminal 6
5 must always be a higher voltage than terminal 66.
That is, since only the alternating current superposed on the direct current has to be applied between the terminals 65 and 66, it becomes a unipolar simulated inductor, not bipolar.

FIG. 18 shows the simulation shown in FIG. 11 and FIG.
9 shows another embodiment of the internal circuit of the Ted inductor 27. In this embodiment, two of the embodiments shown in FIG. 17 are connected in antiparallel. Inductance appears between the terminals 65a and 66a. N-channel FE on numbers 58a and 58b
Indicates T. Numbers 59a, 59b 61a, 61b, 63
Reference numerals 60a and 60b6 are capacitors a and 63b.
Resistances 2a and 62b are shown. 67a, 67
Shown in b. The terminals 64a and 64b are terminals for bias supply. The values of the inductance L and the equivalent series resistance r between the terminals 65a and 66a are expressed by the same formulas as in FIG. Figure 1
The eighth embodiment is characterized in that the voltage between the terminals 65a and 66a may be alternating current. This is simulated
There is no limit to the range of application as an inductor. In other words, it becomes a bipolar simulated inductor. When the voltage of the terminal 65a is higher than that of the terminal 66a, only the FET 58a works by the action of the diode 67a, and when the voltage of the terminal 65a is lower than that of the terminal 66a, the action of the diode 67b causes F
Only ET58b works. The bipolar simulated inductor of the embodiment shown in FIG. 18 is not publicly known and is the first one developed this time.

In the embodiment of FIGS. 17 and 18, the FET
Uses N-channel J-FET, but N-channel MOS FET may be used. It is also clear that a similar simulated inductor can be formed by using a P-channel J-FET or MOS FET and making a small modification to the circuit. It is obvious that the mode of the FET may be a depletion mode, an enhancement mode, or an enhancement / depletion mode. Along with this, the bias voltages 64, 64a, 64b applied to the FETs 58, 58a, 58b, etc. apply either positive voltage or negative voltage. When the FET is in the enhancement mode and the bias voltages 64, 64a, 64b are unnecessary, the capacitor 63,
63a, 63b and the resistors 62, 62a, 62b may be deleted.

FIG. 19 shows an embodiment different from that shown in FIG.
Reference numeral 7 is a bipolar simulated inductor as shown in FIGS. The capacitance of the capacitor 27a is C, and the bipolar simulated inductor 27
Is L, the frequency of the infrared light signal 1d is f, and there is a relation of (2πf) × (2πf) = 1 / L · C, the voltage 27b across the bipolar simulated inductor 27 is L It becomes maximum due to the series resonance of C and C. That is, when the component of frequency f is included in the infrared light signal 1d, the non-biased photodiode 26 generates a constant current according to the amount of incident light, so the frequency f generated by the non-biased photodiode 26 is Only the signal having the component is selectively filtered and expanded to become the voltage 27b, which is amplified by the amplifier 38. As a result, even a weak infrared light signal 1d from a distance can be amplified. The positions of the bipolar simulated inductor 27 and the capacitor 27a can be interchanged with each other. The number 17g is a battery.

Also, the simulated
Since it is obvious that the same effect can be obtained by using a known inductor (not shown) in which a coated wire is wound around a magnetic material instead of the inductor 27, the present invention is limited to the use of a simulated inductor. is not.

[0065]

Since the present invention is constructed as described above, it has the following effects.

That is, a signal generator for emitting an infrared light signal is installed on a stationary body outside the moving body, and the emitted infrared light is received by the infrared light receiving device mounted on the moving body. At this time, the signal and the noise can be separated with a good S / N ratio, and the infrared light signal can be satisfactorily transmitted even if the signal generator that emits the infrared light signal is far from the infrared light receiving device mounted on the moving body. A device capable of receiving light can be provided. It is obvious that the devices mounted on the mobile body and the stationary body may be reversed, and for this reason the above is generically referred to as the objects M1, M2, M3 in the claims.

It is obvious that many embodiments not shown here, which have similar effects to the present invention and have similar effects, are regarded as the same invention as the present invention according to the principle of equality.

[Brief description of drawings]

FIG. 1 is a front view showing a gate and a tag according to an embodiment of the present invention.

FIG. 2 is a timing chart of the embodiment of the present invention and FIG.

FIG. 3 is an internal block diagram of an infrared projector of the present invention.

FIG. 4 is an internal block diagram showing a tag of the present invention.

FIG. 5 is an internal block diagram showing another embodiment of the tag of the present invention.

FIG. 6 is an internal block diagram using an MPU in another embodiment of the tag of the present invention.

FIG. 7 is an internal block diagram showing another embodiment of the tag of the present invention.

FIG. 8 is an internal block diagram showing another embodiment of the tag of the present invention.

FIG. 9 is a schematic diagram showing a position detection system according to an embodiment of the present invention.

FIG. 10 is an internal block diagram showing another embodiment of the tag of the present invention.

FIG. 11 is an internal block diagram using a simulated inductor in the tag of the present invention.

FIG. 12 is an internal block diagram showing another embodiment of the tag of the present invention.

FIG. 13 is an internal block diagram in which a reverse bias photodiode is used for the tag according to the present invention.

FIG. 14 is an internal block diagram using a simulated inductor in the tag of the present invention.

FIG. 15 is a circuit diagram showing an example of a simulated inductor used in the present invention.

FIG. 16 is a circuit diagram showing an example of a simulated inductor used in the present invention.

FIG. 17 is a circuit diagram showing an example of a simulated inductor used in the present invention.

FIG. 18 is a circuit diagram showing an example of a simulated inductor used in the present invention.

FIG. 19 shows an embodiment in which a simulated inductor and a capacitor series resonance circuit are used in the tag of the present invention.

FIG. 20 shows an embodiment in which an active bandpass filter is used in the tag of the present invention.

[Numbers (M1) to (M3) described in the claims]
6) and the reference numbers in FIGS. 1 to 20. Object (M1) = 5 Infrared light signal generator (M2) = 1, 2, 24a, 24
b, 24l Object (M3) = Infrared light signal receiving device (M4) without corresponding numbers in the figure = 3, 3a, 4, 16, 1
6a, 17, 17a, 21a, 21c Radio signal generator (M5) = 16e, 3g, 17f, 2
3 Object (M6) = Radio signal receiver (not shown) (M7) = Battery (M8) not shown = 17 g, Power supply current (M9) = 17i, 36, 41 Ultra low power infrared receiver (M10) = 21a Unbiased photodiode (M11) = 26 Resistance (M12) = 38a Infrared light (M13) = 1d, 7, 7a, 8, 8a, 25
a, 25b, 25l Electric signal (M14) = 16b, 17b, 21b, 21d Electric signal amplifier (M15) = 19, 38 Output of electric signal amplifier (M15) (M16) = 16b,
17b, 21b, 21d Differentiating circuit (M17) = 38b and 38c Output of differentiating circuit (M17) (M18) = 38d Integrating circuit (M19) = 38g and 38h Signal after integration (M20) = 21b Switching element (M21) = 17e MPU (M22) = 16c, 22 MPU (M22) output signal (M23) = 16d,
16f, 22a, 22b Radio signal (M24) = 3j Modulated light (M25) = 1d, 7, 8, 25a, 25b, 2
Electric signal (M26) = 16 related to 5l modulated light (M25)
b, 17b, 21b, 21d AC commercial power supply (M27) = Zero cross point (M28) = 1 of AC commercial power supply (M27) without corresponding number in the figure
1, 12, 13, 14, 15 Real-time clock (M29) = No corresponding number in the figure Switching element (M30) = 17e Power supply current (M31) = 17k High-sensitivity infrared light receiving device (M32) = 21c, Reverse-biased photodiode (M33) = 26a Simulated inductor (M34) = 27 Capacitor (M35) = 27a Active bandpass filter (M36) = 27c

Claims (16)

[Claims] 1. An infrared light signal generator (M2) mounted on (a) an object (M1) and an infrared light signal receiver (M4) and (c) mounted on (b) an object (M3). The object (M3)
A mobile communication device characterized by comprising a radio signal generator (M5) attached to (1) and (d) a radio signal receiver (M7) attached to the object (M1) or the object (M6). , (B) the infrared light signal receiving device (M4) is a battery (M8)
(E) The ultra-low power consumption infrared light receiving device (M10) is constantly supplied with the power supply current (M9) from the (e) ultra-low power consumption infrared light receiving device (M10). A resistor (M1) connected in parallel with M11).
A mobile communication device characterized by including 2). 2. An infrared light signal generator (M2) mounted on (a) an object (M1) and an infrared light signal receiver (M4) (c) mounted on (b) an object (M3). The object (M3)
A mobile communication device characterized by comprising a radio signal generator (M5) attached to (1) and (d) a radio signal receiver (M7) attached to the object (M1) or the object (M6). , (B) the infrared light signal receiving device (M4) is a battery (M8)
(E) The ultra-low power consumption infrared light receiving device (M10) is constantly supplied with the power supply current (M9) from the (e) ultra-low power consumption infrared light receiving device (M10). A mobile communication device characterized by including M11). 3. The infrared light signal receiving device (M4) according to claim 1 or 2, wherein the infrared light signal receiving device (M4) amplifies at least an electric signal (M14) related to the received infrared light (M13). A signal amplifier (M15) and the electric signal amplifier (M
15) Output (M16) Differentiating circuit (M17)
And a integrating circuit (M19) for integrating the output (M18) of the differentiating circuit (M17). 4. In claim 1 and claim 2, claim 3
The integrated signal (M2) generated from the integrating circuit (M19) that integrates the output (M18) of the differentiating circuit (M17)
0) is used to turn on the switching element (M21) and supply the power supply current (M9) from the battery (M8) to devices other than the ultra low power consumption infrared light receiving device (M10). Mobile communication device. 5. In claim 1 and claim 2, claim 3
The integrated signal (M2) generated from the integrating circuit (M19) that integrates the output (M18) of the differentiating circuit (M17)
0) is connected to the input of the MPU (M22) which is constantly supplied with the power supply current (M9) from the battery (M8).
A mobile communication device characterized in that (M22) is woken up to shift from a sleep state to an operating state. 6. In claim 1 and claim 2, the output signal (M23) from the MPU (M22) shown in claim 5 is used to turn on the switching element (M21) and the current from the battery (M8). Ultra low power infrared receiver (M
A mobile communication device, which supplies the device other than 10) and the device other than the MPU (M22). 7. The integrated signal (M2) generated by an integrating circuit (M19) for integrating the output (M18) of the differentiating circuit (M17) according to claim 1 or claim 2.
0) or the output signal (M23) from the MPU (M22) according to claim 5, and the radio signal (M5) generated from the radio signal generator (M5) according to claim 1 and (c). M24) generation control and radio signal (M24)
A mobile communication device, characterized in that the occurrence of the above can be started or stopped. 8. The infrared light signal generator (M2) according to each of claims 1 and 2 (a) is an infrared light signal generator that generates modulated light (M25). The modulated light (M25) is modulated light modulated with an arbitrary code or a rectangular wave, and the infrared light signal receiving device (M4) shown in (b) of claim 1 or 2 is the modulated light (M4). M25) is received to generate an electric signal (M26) related to the modulated light (M25), and the electric signal (M26) is generated.
Is input to the MPU (M22) shown in claim 5, the code included in the electric signal (M26) is detected, and when the code is a specific code, the MPU (M22) claims 1 and 2. (C) of the radio signal generator (M
5) Controls the generation of radio signals (M24) generated from
A mobile communication device, wherein generation of a radio signal (M24) can be started or stopped. 9. The infrared light signal generator (M2) according to each of claims 1 and 2 (a) is an infrared light signal generator that generates modulated light (M25). The modulated light (M25) is modulated light modulated with an arbitrary code, and the infrared light signal generator (M2) obtains power from the AC commercial power supply (M27), and the AC commercial power supply (M27). ), A means for counting the number of zero cross points (M28) by detecting the zero cross points (M28).
The mobile communication is characterized in that the generation of the modulated light (M25) generated from the infrared light signal generator (M2) can be started or stopped only when the counted number is within a predetermined range. apparatus. 10. The infrared light signal generator (M2) according to each of claims 1 and 2, which is an infrared light signal generator for generating modulated light (M25),
The previous modulated light (M25) is modulated light modulated with an arbitrary code, and the infrared light signal generator (M2) is
A real-time clock (M29) is provided, and only when the time of the real-time clock (M29) is within a predetermined range, the infrared light signal generator (M
A mobile communication device, wherein generation of the modulated light (M25) generated from 2) can be started or stopped. 11. An infrared light signal generator (M2) attached to (a) an object (M1) and an infrared light signal receiver (M4) and (c) attached to (b) an object (M3). The object (M
(3) A mobile communication device characterized by comprising a radio signal generator (M5) attached to (3) and (d) a radio signal receiver (M7) attached to the object (M1) or the object (M6). Where the infrared light signal receiving device (M4) in (b) is a battery (M8)
Ultra-low power consumption infrared light receiving device (M10) constantly supplied with power supply current (M9) from the battery, and high sensitivity with power supply current (M31) supplied from battery (M8) via switching element (M30) The infrared light receiving device (M32), and (e) the ultra low power consumption infrared light receiving device (M10),
A mobile communication device characterized by including a non-biased photodiode (M11), and a high-sensitivity infrared light receiving device (M32) including a reverse-biased photodiode (M33). 12. An infrared light signal generator (M2) attached to (a) an object (M1) and an infrared light signal receiver (M4) and (c) attached to (b) an object (M3). The object (M
(3) A mobile communication device characterized by comprising a radio signal generator (M5) attached to (3) and (d) a radio signal receiver (M7) attached to the object (M1) or the object (M6). Where the infrared light signal receiving device (M4) in (b) is a battery (M8)
Includes an ultra-low power consumption infrared light receiving device (M10) which is constantly supplied with a power source current (M9) from (e) the ultra-low power consumption infrared light receiving device (M10) is a non-biased photodiode (M10). A mobile communication device characterized by including a simulated inductor (M34) connected in parallel with M11). 13. An infrared light signal generator (M2) mounted on (a) an object (M1) and an infrared light signal receiver (M4) and (c) mounted on (b) an object (M3). The object (M
(3) A mobile communication device characterized by comprising a radio signal generator (M5) attached to (3) and (d) a radio signal receiver (M7) attached to the object (M1) or the object (M6). Where the infrared light signal receiving device (M4) in (b) is a battery (M8)
Includes an ultra-low power consumption infrared light receiving device (M10) which is constantly supplied with a power source current (M9) from (e) the ultra-low power consumption infrared light receiving device (M10) is a non-biased photodiode (M10). A mobile communication device characterized in that a series resonant circuit of a capacitor (M35) and a simulated inductor (M34) is connected to both ends of M11). 14. Two simulated inductors, characterized in that the phase of the voltage applied between the drain and source of the FET is delayed by a resistor and a capacitor, and the delayed voltage is applied to the gate of the FET. , A bipolar simulated inductor, characterized in that the two simulated inductors are connected in anti-parallel. 15. A mobile communication device according to claim 12, wherein a publicly known inductor in which a coated copper wire is wound around a magnetic material is used instead of the simulated inductor (M34). . 16. The infrared signal receiving device (M4) according to claim 3, wherein the electric signal amplifier (M15) and the differentiating circuit (M17) are removed, and an active bandpass filter ( A mobile communication device, characterized in that the electric signal (M14) related to the received infrared light (M13) is amplified using M36).