JP2000356676A - Moving body communication device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make detectable the position of a moving body or a person by using a signal generator including an infrared ray signal generator, and generating a burst signal of infrared ray signal. SOLUTION: The numbers 7a, 8a respectively indicate the waveforms of infrared ray signals 7, 8. The numbers 9, 10 are rectangular wave signals in synchronization with the waveforms 7a, 8a, and signals become '1' only during the generation of a burst. The signal 9 is generated in a tag 3, and the signal 10 is generated in a tag 4. A pulse 11 is generated in the tag by the rising of the signal 9, and a pulse 12 is similarly generated in the tag by the rising of the signal 10. Then a rectangular wave 13 is generated in synchronization with the rising of the pulse 11, and a rectangular wave 14 is generated in synchronization with the rising of the pulse 12. Then a signal is sent back from the tag 3 through the electric wave as carrier only when the rectangular wave 13 is '0', and a signal is sent back from the tag 4 through the electric wave as carrier only when the rectangular wave 14 is '0', whereby the interference of the sent-back waves can be prevented as they are alternately generated though they are close to each other in distance, and the signals can be time- divisionally received by a receiver.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention And a device for detecting the position from a remote place.

[0002]

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

[0003]

When a conventional device using a microwave is used for an outdoor vehicle, the microwave is absorbed by water in a heavy rain or dense fog, so that an accessible distance is 1 /. There is a problem that it becomes 3 to 1/10. Further, when a large truck is located in front of the target vehicle, the microwave is scattered by the large truck and radiated to an adjacent lane. Also, from the microwave transmitter provided just above one lane that the car passes,
There was also a problem that microwaves leaked and interfered with the microwave receiver provided immediately above the adjacent lane.

[0004] It is an object of the present invention to provide a mobile or human position detecting device which solves the above-mentioned problems.

[0005]

In order to achieve the above object,
In the present invention, a burst signal of an infrared light signal is generated using a signal generation device including an infrared light signal generation device.

The above signal is received by an infrared light signal receiving device mounted on a moving body. Detect the beginning of the burst signal, create a square wave signal synchronized with the burst signal,
In synchronization with this rectangular wave signal, the radio signal generator is
N, turn OFF, and transmit data with the radio signal as a carrier only when ON. This data is received by a radio signal receiver provided outside the moving object.

Here, the infrared light is emitted toward the vehicle from immediately above the lane adjacent to one lane. At this time, when the infrared light is emitted to one lane, the infrared light is emitted to the adjacent lane. In order not to radiate, if the infrared light is radiated so that the phases are opposite to each other, when the car in the one lane is returning data by the radio wave transmitter, the car in the adjacent lane is the data Is returned, and data is returned alternately in a time-division manner. Therefore, even if return radio waves of the same frequency are used, there is no interference and the reply between lanes can be separated.

It is also possible to provide an infrared light signal transmitting device in place of the above-mentioned radio signal transmitting device, and it is clear that transmission and reception can be performed similarly.

[0009]

The mobile communication device constructed as described above can be used when an infrared light signal is falling on a vehicle in one lane.
The signal does not fall in the adjacent lane, and this relationship is alternated in a time-sharing manner. Therefore, when a return radio signal is output from a vehicle in one lane as described above, Since no reply signal is output from the car, and there is no interference between the reply radio signals, the reply between the lanes is separated.

[0010] The above operation is based on the fact that infrared light is almost falling on each lane and falls alternately. Further, the radio signal transmitter mounted on the moving body alternately synchronizes with the signal. It is based on the fact that it is sending back radio waves.

[0011]

An embodiment will be described with reference to the drawings. FIG. 1 shows an embodiment, in which the numbers 1 and 2 are infrared light signal transmitting devices for adjacent lanes, and the tags 3 and 4 are tags in the adjacent lanes, respectively. The moving object or person to be used is not shown. Reference numeral 5 denotes a gate on which the transmission devices indicated by reference numerals 1 and 2 are mounted, and reference numeral 6 denotes a ground. Numbers 7 and 8 indicate infrared light falling on each lane.

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

Numerals 9 and 10 are rectangular wave signals synchronized with the waveforms 7a and 8a, and are signals which become "1" only during bursts. Signal 9 occurs in tag 3 of FIG. 1 and signal 10 occurs in tag 4 of FIG. At the rising edge of the signal 9, a pulse 11 and at the rising edge of the signal 10, a pulse 12 also occur in the tag. Next, a rectangular wave 13 is generated in synchronization with the rising edge of the pulse 11, and a rectangular wave 14 is generated in synchronization with the rising edge of the pulse 12. Next, only when the square wave 13 is “0”, a signal using the radio wave as a carrier is returned from the tag 3 of FIG. 1, and only when the square wave 14 is “0”, the radio wave is transmitted from the tag 4 of FIG. If this signal is returned, the returned wave is alternately generated although it is close in distance, so that it can be received in a time-division manner by a receiving device (not shown) without interference.

The signal 15 in FIG. 2 is a signal which counts rectangular waves such as the signals 13 and 14 and becomes "0" after a certain count. The signal 15 is used to return from the tag while it is "1". Waves can be made to continue.

Although the example shown in FIG. 1 has been described for a case where the number of lanes is two, the relationship between signals between adjacent lanes is, for example, as shown in FIGS. In this case, the return radio waves are generated simultaneously in every other lane, but it was confirmed that no interference was caused because they were not adjacent to each other and were far away.

Although a car has been described, it is clear that the same can be said when a person other than the car passes by holding the tags 3 and 4 of FIG. In this case, even when a large number of people pass through a fixed path under a wide gate, similarly, a return radio wave generated from a tag possessed by each person can be detected in a time-division manner. If the return radio wave was weakened, the return radio wave could be received without interference even if the gate height was 4 to 5 m and the distance between adjacent passages was 50 cm.

Here, the same operation can be obtained by returning a signal from the tags 3 and 4 using an infrared light signal generator instead of the return radio wave.

FIG. 3 shows an internal block diagram of the infrared light signal generator shown as No. 1 in FIG. The electric signal generated from the signal generator 1a is amplified by the amplifier 1b, and the infrared LED 1c
And emits an infrared light signal 1d. The same applies to the internal block diagram of the component indicated by reference numeral 2 in FIG.

Here, the waveform of the infrared light signal indicated by 1d in FIG. 3 is the signal 7a of FIG. 2, and the waveform of the infrared light signal generated from the signal generator indicated by reference numeral 2 in FIG. 1 is the signal of FIG. 8a.

Reference numeral 3 in FIG. 4 indicates the tag 3 shown in FIG. 1 and its internal block diagram. Number 1d indicates the same infrared light signal as number 1d in FIG. Its waveform is 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,
Generates a signal 9 shown in FIG. 2, which is sent to the one-shot multivibrator 3c.
1 is generated, which resets the counter 3d. The counter 3d is supplied with a clock from a clock generator 3e, and generates a signal 3f in synchronization with the clock. The waveform of the signal 3f is the signal 13 in FIG. When this signal 3f is "0", 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 generation device 3h to the radio signal generation device 3g, and a radio signal 3j having a fixed frequency modulated by the data 3i as a carrier is emitted to be a return radio wave. .
The return radio wave 3j is received and demodulated by a fixed, known radio wave receiver (not shown), and the original data 3i is extracted.

The above description for the tag 3 in FIG. 1 is the same for the tag 4, except that the signal is the signal 8 in FIG.
a, 10, 12, 14.

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

Numeral 16 in FIG. 5 indicates a tag similar to tag 3 in FIG. 4, and is an internal block diagram showing another configuration. 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 indicated by reference numeral 3a in FIG. The waveform of signal 16b generated by device 16a is signal 9 of FIG. 2, which is sent to microprocessor 16c. The signal 13 of FIG.
A signal 16d similar to that shown in FIG.
The radio signal generator 16e similar to the number 3g is enabled. At the same time, the data 16f is also sent to the device 16e, and from the signal generator 16e, the data 1
A return radio wave 3j modulated by 6f is emitted. Here, the same effect can be obtained by replacing the radio signal generator shown in FIG. 4 with the infrared signal generator as indicated by reference numeral 3g and FIG. 5 by reference numeral 16e. At this time, the light is received by the infrared light signal receiving device fixed outside the moving body and demodulated to the original data.

In FIG. 5, the signal 1d is changed to the signal 7 in FIG.
Instead of the burst waveform shown in FIG. 3A, a burst waveform of a data signal having the same burst period can be used. At this time, firmware of an algorithm for generating a signal 16d similar to the signal 13 of FIG. 2 and a data signal 16f including data unique to the tag 16 and the received data signal by the microprocessor 16c can be provided. Is obvious. The radio signal 3j is a radio signal modulated by the signal 16f.

Further, if the infrared light signal generators 1 and 2 shown in FIG. 2 are narrowed in the angle of directivity of infrared light by a cylinder, it is apparent that signals can be separated between adjacent lanes at narrower intervals.

A continuous rectangular or sine wave signal can be used instead of the burst signals 7a and 8a in FIG. At this time, separation between adjacent lanes is not performed.

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

Now, after generating only one burst optical signal 25a such as the signal 7a in FIG. 2 from the light emitting device 24a,
Stop the outbreak. At this time, the tag 3 similar to the tag 3 in FIG.
Upon receiving this burst optical signal 25a, the internally generated signal 13 in FIG. 2 becomes "0" and returns to "1" after the burst stops. Only when the signal 13 is “0”, a radio signal is generated from the tag 3. When the radio signal is received by a radio receiver outside the tag 3, the tag 3 emits a light beam 25 a.
You can know that it exists within. That is, the position of the tag 3 can be detected.

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

FIG. 6 shows the state of power supply to the tags 3 and 16 shown in FIGS. Numeral 17 indicates the tag and its internal block diagram. The infrared light 1d is transmitted to the infrared light receiving device 17a.
And the signal 17b is sent to another device 17f in the tag. On the other hand, the signal 17b is a known rectifier circuit 1
7c is converted to a DC signal 17d, which is used as a control signal to turn on the analog switch 17e to turn the power of the battery 17g through the power supply line 17h to another device 17f.
To supply. Therefore, the power consumption of the battery 17g can be reduced because the analog switch 17e is OFF until the signal 1d is received. The battery 17g may be a battery mounted inside the tag 17 or may be removed from the battery 17g and supplied with power from a power supply (not shown) attached to a moving body to which the tag 17 is mounted, and may be used instead of the battery 17g.

Power is always supplied from the battery 17g in the tag to the infrared light receiving device 17a through the power supply line 17i. However, when the device 17a includes a CMOS high input impedance amplifier, the idling power supply current of the amplifier is 4
It has been found that the battery life can be reduced to about μA, and the life of the battery 17g can be significantly extended.

When the device 17a is a forward-biased 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 also about 4 μA. is there.

FIG. 7 shows an internal block diagram of the receiving device 17a of FIG. Numeral 18 indicates a reverse biased photodiode or solar cell, numeral 19 indicates a CMOS high input impedance amplifier, and numeral 20 is a resistor. The signal 17b is a signal related to the optical signal 1d and is a signal obtained by extracting only this AC component through a band-pass filter (not shown). In this manner, a signal related to only the optical signal 1d can be extracted without being affected so much by sunlight or the like. 17i is a power supply line.

FIG. 8 is a block diagram of another configuration 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 by the power supply currents 17i and 17j.
Powered by Here, when the battery 17g is 3V, the current 17i is 4 μA, 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 generator 23 is about 25 mA, so that the power supply current is normally supplied by the switching element 17e. It is shut off.

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

The signal 21d is input to the MPU 22 and
22 interprets the command, generates a signal 22b according to the content of the command, and sends the signal 22b to the radio signal generator 23 which is also active, thereby generating a radio signal 3j modulated by the signal 22b. Instead of the radio signal generator 23, an infrared signal generator using LEDs may be used. In this case, the signal 3j is infrared light.

Further, depending on the content of the command of the signal 21d, 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 the weak infrared light 1d cannot be faithfully amplified and the signal 2
1b is a pulse-shaped waveform having a deformed shape.

The MPU 22 is changed from the sleep mode to the operation mode by the falling or rising edge of the pulse waveform 21b, the signal 22a is activated, the switching element 17e is turned on, and the high-sensitivity infrared light receiving device 21c is turned on.
When activated, the infrared light 1d is received, the waveform of the infrared light 1d is faithfully amplified and detected, an accurate signal 21d relating to the signal waveform of the infrared light 1d is taken out, input to the MPU 22, and the signal 21d Is interpreted by the MPU 22.

At this time, the power supply current 17k is 1-2 mA, but when the interpretation of the command is completed, the signal 22a is made inactive again, so that the power supply current 17k becomes zero and the battery consumption at that time becomes very small. The same applies to the power supply current 17h. Here, it is apparent that another switching element similar to the switching element 17e may be provided to separately control the power supply currents 17h and 17k.

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. 10, the same numbers as those in FIG. 8 indicate the same items. 8 is different from FIG. 8 in that an MPU 22d is provided in addition to the MPU 22, and the sleep mode is set when both are waiting for the infrared light command 1d. Infrared light command 1d is light receiving device 21a
Is input to the MPU 22, the MPU 22 shifts from the sleep mode to the operation mode, activates the signal 22f, turns on the switching element 17e, supplies the power supply current 17k to the light receiving device 21c, and outputs the infrared light command signal 21d to the MPU 2
2 and interpreted.

Next, the MPU 22 outputs the signal 22c to the MPU 22
d, and the MPU 22d shifts from the sleep mode to the operation mode. 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 is emitted as a radio signal 3j. At this time, the signal 22b is low. The purpose of providing two MPUs is to transmit the ID data 22g exclusively by using M
The MPU 22 monitors only the command signal 21d from the light receiving device 21c, leaving the command signal 21d to the PU 22d.
For example, data included in the signal 21d can be written to the nonvolatile memory in the MPU 22 depending on the contents of the operation.

Therefore, even during the writing to the MPU 22, the MPU 22d can continue sending the data 22g without interruption. Therefore, in the embodiment of FIG.
When a write-type data carrier is configured, it is possible to simultaneously write data 21d to the data carrier and simultaneously transmit data 22g, thereby shortening the operation time of the data carrier.

When the MPU 22 activates the signal 22a, the radio signal generator 23 becomes active as in FIG. When the signal 22g from the MPU 22d is low,
The signal 22b from the MPU 22 is sent to the radio signal generator 23 through the OR circuit 22e, and may be converted into 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. Forward-biasic mode
The infrared light signal 1d is input to the photodiode 26 having the following configuration. The waveform of the infrared light signal is, for example, a signal obtained by modulating modulated light of 38 kHz with data. 38k when logic 0
Hz modulated light is generated, and at the time of logic 1, 38 kHz modulated light is not generated.

Therefore, the photocurrent 27 a generated from the anode of the photodiode 26 returns to the ground 37 through the inductor 27 and returns to the cathode of the photodiode 26, but the AC component in the photocurrent 27 a flows to the inductor 27. And the terminal voltage V of the inductor 27 is | V | = 2
It becomes a large voltage according to πfL. f is the frequency of the AC component,
L is the inductance of the inductor 27.

The infrared light 1 incident on the photodiode 26
When d includes infrared light modulated at a low frequency such as DC light such as sunlight or electric light, these low frequency or DC infrared light
The voltage does not appear as a large voltage at the terminal of the inductor 27, but appears only at both ends of the inductor 27 as a small voltage slightly determined by the DC resistance of the inductor 27.

For this reason, 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 inductor 27, so that the infrared light signal (high frequency component) and the disturbance light (sunlight and Electric light) can be separated by the inductor 27 with high sensitivity. The current of the high-frequency component of the infrared light signal that appears at both ends of the inductor 27 flows through the capacitor 28 from the base of the transistor 30 to the emitter. When the battery 17g has a voltage of 3 V and the resistor 29 has a resistance of 200 MΩ, the impedance between the base and the emitter of the transistor 30 is 40 MΩ, which is sufficiently higher than the impedance of the inductor 27.

On the other hand, when a DC light component such as sunlight is strong, only the low DC resistance of the inductor 27 acts as a load for the forward-biased photodiode 26, so that the photodiode 26 is unlikely to be saturated by DC light. .
The collector voltage of the transistor 30 passes through the capacitor 32, is input to the CMOS NAND gate 35, and the signal 2
1b, and this signal 21b is the MPU2 in FIGS.
2 is input. When the resistance 31 was 3 MΩ and the resistances 33 and 34 were 10 MΩ, the current 36 flowing out of the battery 17 g was 4 μA when there was no signal. Therefore, if only the standby state continues, the life of the battery 17g of 1000 mA
Even if the remaining amount of 7 g is 500 mA · h, it will be 14 years, and the battery consumption can be ignored sufficiently.

FIG. 12 shows another embodiment of the inside of the light receiving device 21a shown in FIGS. 8 and 10. The infrared light signal 1d incident on the forward-biased photodiode 26 is amplified by an ultra-low current consumption operational amplifier 38. And passes through, for example, a band-pass filter 39 that passes only 38 kHz, and
The signal passes through 0 and becomes a signal 21b, which is input to the MPU. The current 41 flowing out from the battery 17g was also 4 μA.
The load resistance of the photodiode 26 is shown at 38a.

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 light amount.
A voltage corresponding to the value of b is generated, and an amplified voltage 38a is generated, of which only the 38 kHz component, for example, passes through the band-pass filter 39 and becomes a signal 39a. The signal 39a is input to the detection circuit 40, and 38 kHz of the modulated signal is removed to become a signal 40a which is the original data of 0 and 1.
Further, the signal 40a is shaped into a waveform by the waveform shaping circuit 42, and is input to the MPU as a signal 21d. Signal 21
d is a 0,1 data signal included in the original infrared light signal 1d.

The circuit shown in FIG. 13 has a high degree of amplification and therefore has high sensitivity. Therefore, the current 41 flowing out of the battery 17g is as large as 1 to 2 mA. When strong DC light such as sunlight is included in the infrared light signal 1d, the photodiode 2
The current 41 a flowing through 6 a reaches 2 mA, which is added to the current 41. This is an unavoidable phenomenon when using the photodiode in the reverse bias mode.

Since the output signal 21b in FIGS. 11 and 12 is a signal amplified by a circuit with an extremely low current consumption, the waveform reproducibility is poor, and the signal 21b cannot faithfully reproduce the original 0,1 data signal waveform. This is particularly significant when the infrared light signal 1d is weak, that is, when it is an infrared light signal emitted from a distance.
However, since the signal 21b is a pulse signal having a constant pulse width close to the original 0,1 data signal, the signal 21b
Can be recognized by the MPU. That is, at the falling edge of the signal 21b, MP
After U is changed from sleep mode to operation mode, signal 21
The pulse width of b may be measured by the MPU.

When the signal 21b has a constant pulse width,
Recognizing that 0, 1 data has been input, the high-sensitivity light receiving device 2
By activating 1c, the waveform of the data signal included in the infrared light signal 1d is faithfully received by the light receiving device 21c.

[0056]

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

That is, a signal generator that emits an infrared light signal is installed on a stationary body outside the moving body, and the emitted infrared light is received by a receiving device mounted on the moving body.
Activated by this, if the return radio wave or infrared light generated from the adjacent moving body is generated in a time-division manner, if the interval between the adjacent moving bodies is once more than the limit,
Since the reply wave can be received outside the moving body without mutual interference, there is an effect that the ID of the moving body and each position can be detected. It is clear that the devices mounted on the moving body and the stationary body may be reversed. Therefore, in the claims, the above is generically referred to as the objects 1, 2, and 3.

It is clear that many embodiments not shown here which have a similar effect and achieve similar effects to the present invention are regarded as being identical to the present invention in accordance with the principle of equivalents.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

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

FIG. 3 is an internal block diagram showing an embodiment of the present invention.

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

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

FIG. 6 is an internal block diagram showing an embodiment of the present invention.

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

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

FIG. 9 is a sketch showing an embodiment of the present invention.

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

FIG. 11 is an internal block diagram showing an embodiment of the present invention.

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

FIG. 13 is an internal block diagram showing an embodiment of the present invention.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04B 10/10 10/22

Claims (3)

[Claims] 1. An infrared light signal generator mounted on an object 1, (b) an infrared light signal receiver mounted on an object 2, and (c) an infrared light mounted on the object 2. (D) a signal generator including at least one of a signal generator and a radio signal generator; and (d) at least one of an infrared signal receiver or a radio signal receiver mounted on the object 1 or 3. In the mobile communication device characterized in that it comprises a signal receiving device, the infrared signal receiving device of FIG.
(E) an ultra-low power consumption infrared light receiving device 5 which is always supplied with a power supply current, and a high sensitivity infrared light receiving device 7 which is supplied with a power supply current from a battery 4 via a switching element 6. The ultra-low power consumption infrared light receiving device 5 includes an inductor 9 connected in parallel with a forward-biased photodiode 8, and (f) the high-sensitivity infrared light receiving device 7 is reverse-biased. A mobile communication device characterized by including a photodiode 10. 2. An output signal 11 generated from the ultra low power consumption infrared light receiving device 5 according to claim 1 is input to a microprocessor (MPU) 12, which controls the switching element 6 to turn it on. A moving body, wherein a power supply current is supplied from the battery 4 to the high-sensitivity infrared light receiving device 7, and an output signal 13 generated from the high-sensitivity infrared light receiving device 7 is input to the microprocessor 12. Communication device. 3. The microprocessor according to claim 1, wherein
4 and a microprocessor 15, and an output signal 16 generated from the infrared light receiving device of (b) is input to the microprocessor 14, and the microprocessor 14 performs an operation according to the content of the command of the output signal 16 and An output signal 17 is generated and input to the microprocessor 15. The microprocessor 15 inputs the data stored in the microprocessor 15 to the infrared signal generator or the radio signal generator (c), A mobile communication device characterized by generating an external light signal or a radio signal.