JP2757968B2 - Wireless operator absence detector - Google Patents

Abstract

PURPOSE:To surely detect whether the operator of a mobile station side is absent or not by integrating the duration of an incoming call sound signal generated after a prescribed time from the point of time detecting an incoming call signal first, and generating an absence detecting signal at the point of time attaining the prescribed time. CONSTITUTION:An incoming call sound is generated corresponding a call from a base station, and an incoming call sound detecting circuit 110 detects the signal of the incoming call sound. The control circuit 120 supplies a trigger signal to a timer circuit 130 at the first leading edge of the detecting signal and start a timer. And, when receiving a time-up signal, a timer circuit 140 is started at the point of time, and simultaneously to the start, an incoming call sound detecting signal supplied from the detecting circuit 110 after that or the signal of the time width corresponding to it is supplied in an integrating counter 150. The integrating counter 150 supplies the signal to the control circuit 120 at the point of time when an integrated time become a prescribed time Y set preliminarily, then the control circuit 120 outputs the absence detecting signal.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting and identifying whether or not an operator of a wireless device is absent, and more particularly to a device for arranging a wireless device of a mobile station. The present invention relates to a wireless operator absence detection device capable of reliably detecting that a ringing tone continues to ring and detecting the absence of an operator.

[Prior Art] FIG. 5 shows a conventional wireless system that has been widely used. In the figure, 1 is a base station wireless device, 2 is a vehicle-mounted (mobile station) wireless device, and 3 is a vehicle-mounted wireless device. Paging transmitter, 4
Is a receiver.

In the above-mentioned conventional radio system, the base station radio 1
When the in-vehicle wireless device 2 is called from, the operator can respond to the call when the operator is in or near the vehicle,
When the operator is absent, the continuation of a predetermined time of the ringing tone (ringing tone) is detected by a signal of the external speaker terminal of the wireless device 2, and the wireless calling transmitter is activated, thereby being at a remote place. The receiver 4 carried by the operator is called so that the operator can be notified that a calling signal has arrived at the wireless device 2.

And the in-vehicle radio in this type of system is
When the operator does not respond, a ringing tone indicating that the operator is being called from the base station is automatically and intermittently continuously sounded for a predetermined time (for example, about one minute). Since a sound (for example, pull-pull-pull) is formed at two frequencies, the following method has been used as a method for detecting the intermittent continuation of the ringing tone.

(1) Some kind of audio signal for a predetermined time (for example, about 20 seconds)
How to detect if it is continuing.

(2) detecting one frequency included in the ring tone signal,
A method to detect if it has been running for a predetermined time.

[Problems to be Solved by the Present Invention] Since the conventional method of detecting absence of an operator in a wireless system is configured as described above, there are the following problems.

In the above method (1), since all the sound signals output from the speakers are detected and the duration of the signals is monitored, the voice during a call is also detected.
Therefore, in order not to erroneously recognize that the continuation of the voice signal during the call is absent, the absence is detected with a voice continuation of 20 seconds or more, which hardly occurs in a normal call, but in this case too long. There was a case where a call was mistakenly recognized as being absent.

Also, if the monitoring duration is too long, the time lag before calling the receiver 4 becomes too large,
Further, depending on the type of the wireless device, the ringing tone stops and an absence detection signal cannot be generated, and therefore, the receiver 4 cannot be called despite the absence.

In the above method (2), there is a high possibility that the frequency of the incoming call sound signal is also included in the voice and the like during the call, and the absence detection signal is output even during the call as in the above (1). There was fear. For example, when the whistling continued during a call, the receiver 4 was mistakenly called and the receiver 4 was called.

Further, in such a wireless system, there is a type in which the incoming call sound of the mobile wireless station is interrupted while the radio wave of the base station is arriving. That is, if the voice of the operator of the base station, for example, the voice of "No. 1 car, please answer." Or the like is mixed with the incoming call sound during the incoming call, it becomes difficult to hear the sound. It is something that can be heard reliably. In such a type of in-vehicle wireless device, if the voice of the operator from the base station is long, the time during which the called party rings will be short, so the method of monitoring the duration of the ringing tone and detecting absence is not known. If it is absent, it may not be possible to detect it, and the reliability is reduced. to solve this problem,
If the continuation detection time is shortened, there is a possibility that a short delay in the response of the operator on the mobile station side may lead to erroneous recognition that the mobile station is absent, and in this case also the reliability is reduced.

SUMMARY OF THE INVENTION The present invention is to provide a radio operator absence detection device for solving the above-described problems of the conventional example and for reliably detecting whether or not an operator at a mobile station is absent. The purpose is.

[Means for Solving the Problems] In order to solve the above problems, the wireless operator absence detecting device of the first invention of the present application detects a ring tone signal generated in a wireless device, and converts the signal to a signal. It is characterized in that it is configured to integrate the duration of a ring tone signal generated after a predetermined time after the first detection and to generate an absence detection signal when the duration reaches a predetermined time or more. I have.

Further, in the wireless operator absence detection device according to the second invention of the present application, it is determined whether or not all the plurality of frequencies included in the ring tone signal generated intermittently in the wireless device are generated within a predetermined time. Is detected, and the absence detection signal is generated when the plurality of frequency detections continue for a predetermined time or more.

[Embodiment] FIG. 1 shows an embodiment of the absence detection apparatus according to the first invention of the present application.
20 is a control circuit, 130 and 140 are timer times T ₁ ,
Timer circuit is set to T _2, is an integrated counter for producing an output 150 is the integrated value becomes Y.

A more detailed configuration and operation of the embodiment shown in FIG. 1 will be described with reference to FIG.

When a ring tone is generated in response to the call from the base station and the ring tone detection circuit 110 detects the ring tone signal, the second
The ringing tone detection signal as shown in FIG.
Output to 0. The control circuit 120 supplies a trigger signal to the timer circuit 130 at the first leading edge of the detection signal to start the timer. The activated timer circuit 130 is connected to the second
FIG timer operation starts as shown in (b), supplies a time-up signal to the control circuit 120 and a lapse of T ₁ set time. Upon receiving the time-up signal, the control circuit 120 activates the timer circuit 140 at that time as shown in FIG. 2 (c). During the timer operation of the timer circuit 130, the timer circuit 130 receives a leading edge of a new ring tone detection signal supplied to the control circuit 120.
Is configured not to be retriggered.

The control circuit 120 supplies the ringing tone detection signal supplied from the detection circuit 110 or a signal having a time width corresponding thereto (FIG. 2 (d)) to the integration counter 150 simultaneously with the activation of the timer circuit 140. The integration counter then integrates the duration of the supplied signal.

The integration counter 150 determines when the integration time reaches a predetermined time Y set in advance (X ₁ + in FIG. 2D).
At the time when X ₂ = Y), a signal is supplied to the control circuit 120, whereby the control circuit 120 outputs an absence detection signal. Therefore, for example, the radio page transmitter 3 shown in FIG. 5 can generate a transmission signal for calling the operator to the receiver 4.

In the above, the time T ₁ set in the timer circuit 130
Is the maximum time required for the mobile station operator to respond normally, and functions so that the absence detection signal is not output if the operator's response is slightly delayed.The value is about 10 to 20 seconds. Is set. Further, the purpose of obtaining the integration time of the ring tone signal detected only during the operation of the timer circuit 140 is to prevent the integration of the ring tone signal in the next call from the base station. There, the time T ₂ is set to the timer circuit is approximately 40 to 50 seconds. Note that the total time (T ₁ + T ₂ ) set in both timer circuits is set to be approximately equal to the time that the ringing tone continues to sound for one call, and is changed depending on the type of radio. However, it is usually about one minute. Further, the time Y set in the integration counter 150 is about 1 to 10 seconds, which is sufficient.
Since the timer circuit 130 is provided, the integration counter 150 operates only when the ringing tone continues intermittently for at least T ₁ hour, so that even if the time Y is short, the total is 11 to 30 seconds or more. Can be confirmed, and the absence can be reliably detected.

FIG. 3 shows an embodiment of the absence detection circuit according to the second invention of the present application. In the drawing, reference numerals 210 and 220 denote signals of frequencies f ₁ and f _{2 in} the ringing tone signal, respectively. There during being delivered, the tone detection circuit output is Akuteibu state, 230 delay circuit for delaying a predetermined time signal from the tone detection circuit 220, 240 is an aND gate, 250 is set to the timer time T ₃ This is a timer circuit. Note that the delay circuit
Reference numeral 230 is for compensating for the time difference between the signals of the frequencies f ₁ and f ₂ appearing in time series in the ring tone signal. Therefore, the AND gate 240 can output a signal indicating whether or not both frequencies have been input within a certain period.

With reference to FIG. 4, a more detailed configuration and operation of the absence detection device shown in FIG. 3 will be described.

The Chakukoon signal generated in response to a call from the base station, the frequency f ₁ and f ₂ alternately appear, as shown in FIG. 4 (a). Tone detection circuit 210, only when the frequency f ₁ as shown in FIG. 4 (b) appeared to produce a high level output, whereas the tone detection circuit 220, as shown in FIG. 4 (c) It generates a high level output only when the frequency f ₂ appeared. Therefore, normal speech signals are blocked by these tone detection circuits.

The output of the tone detection circuit 220 is delayed by a delay circuit 230 as shown in FIG. 4 (d), and then ANDed with the output of the tone detection circuit 210 by an AND gate 240. A match output is generated as shown in (e). The output of this AND gate is the timer circuit in the subsequent stage.
Its intermittent duration is supplied to the 250, i.e., is monitored time high level output from the AND gate 240 continues intermittently, its duration and outputs an absence detection signal exceeds a predetermined time T ₃ .

The timer circuit 250 is activated when the output from the AND gate and 240 goes high at the leading edge becomes Akuteibu state, the timer as long as the input is low level state even reversed to the low level lasts the predetermined time T ₄ or more It continues to operate, and is configured to output a time-up signal after T ₃ hours from the start as described above. Therefore, the low level signal exceeding of T ₄ hours is input, the timer circuit 250 engages the counting operation does not output an absence detection signal as the operator responds. The time T ₃ is set to about 10 to 20 seconds which is longer than the time required for the operator to normal answer (about 1 to 10 seconds), than repetition period of the time T ₄ is Chakukoon signal Is also set slightly larger.

The audio signal during a call, because it also includes those usually frequency f ₁ and f _2, the tone detection circuit of the absence detecting circuit
210 and 220 may be active during a call.
However, it is almost no signal in the frequency f ₁ and f ₂ is followed alternately during a call audio signal, hence whether the frequency f ₁ and f ₂ are followed alternately, further detects whether it has followed extent As a result, the absence of the operator can be reliably detected.

In the above embodiment, the delay circuit 230 is inserted only after the tone detection circuit 220. However, the delay circuit 230 may be provided only after the other tone detection circuit 230, or may be provided after both tone detection circuits. Good thing. In any case, it is necessary to determine the delay time (both the leading edge and the trailing edge) to be set in the delay circuit according to the duration of each of the frequencies f ₁ and f ₂ included in the ring tone signal. Needless to say.

Further, in the case of a wireless device in which the tone of the ringing tone includes three or more frequencies, a tone detection circuit may be provided for each of the frequencies, and the delay circuit may appropriately correspond to the frequency.

The operator absence detecting device of the present invention can be applied not only to a system that wirelessly calls an operator who is remote from a wireless device, but also to a system that calls an operator by sounding a siren. Further, the present invention is applicable not only to calling the operator of the mobile station but also to calling the operator of the base station.

Furthermore, the present invention can be used not only to call an operator when the operator is absent, but also to supply a signal to the other party to notify that the operator is absent, or a recording device provided in a mobile station. It can also be used to automatically record the voice of the other party.

[Effects] The first invention of the present application has the following effects.

(1) At least T ₁ (10 to
Since the absence is not detected until the time exceeds +20 seconds) + Y time, even if the response of the operator is delayed to some extent, the absence of the absence is rarely recognized.

(2) The time Y for actually integrating and measuring the ringing tone duration is 1
Since it takes only about 10 seconds, the absence can be reliably detected even if the base station operator generates a voice such as "No. 1 car, please answer." Further, even when the time width of the ringing tone is reduced due to interference or the like, the absence can be reliably detected if any ringing occurs after a certain time.

The second invention of the present application has the following effects.

(1) Since the incoming call sound is detected for each frequency included in the incoming call sound and whether or not the frequency is generated alternately, the call sound signal from the base station during the call is erroneously recognized. There is no detection.

(2) Since it is possible to reliably detect that the ringing tone continues to be heard, it is possible to determine that the operator is absent by detecting the ringing tone for a time width slightly longer than the time during which the operator can normally respond. Yes, thus reducing the time lag.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the first invention, and FIG.
FIG. 3 is an explanatory diagram for explaining the operation of the first invention, FIG. 3 is a block diagram showing an embodiment of the second invention, and FIG.
FIG. 5 is a system block diagram showing a general wireless system to which the present invention can be applied. 110 ring tone detection circuit 120 control circuit 130, 140 timer circuit 150 integrating counter 210, 220 tone detection circuit 230 delay circuit 240 AND gate 250 timer circuit

Claims (3)

(57) [Claims] An absent detection device for detecting the absence of an operator of a wireless device, detects a ring tone signal generated intermittently in the wireless device, and outputs a ring tone detection signal in accordance with the ring tone signal. Ringing tone signal detecting means, first means for outputting a first time-up signal when a first predetermined time has elapsed from the first leading edge of the ringing tone detection signal, Receiving means for integrating the duration of the ringing tone detection signal from the time when the time-up signal is received, and outputting an absence detection signal when the integrated value reaches a predetermined value. Wireless operator absence detection device. 2. The absence detection device according to claim 1, wherein a second time-up signal is generated at a time when a second predetermined time has elapsed from the time when the first time-up signal is generated,
A wireless operator absence detection device comprising a third means for terminating the integration operation of the second means when the second means does not generate an absence detection signal. 3. An absence detection device for detecting the absence of an operator of a radio device, wherein a ring tone signal generated intermittently in the radio device is detected, and a frequency is included for each frequency included in the ring tone signal. Tone signal detecting means for detecting and outputting a ringing tone detection signal for each frequency in response to the ringing tone detection signal for a first frequency group including at least one frequency among the ringing tone detection signals for each frequency A delay unit for delaying a signal by a predetermined time, an AND gate unit for calculating a logical product of a signal from the delay unit and a ring tone detection signal of a frequency not included in the first frequency group; A timer means for measuring the intermittent duration of the signal and outputting an absent detection signal when the intermittent duration exceeds a predetermined time. .