JPH10294971A - Mobile telephone system and mobile radio telephone set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of accident caused by reduction of concentration when driving an automobile while talking by using a mobile radio telephone set. SOLUTION: This mobile radio telephone set (a) is provided with an acceleration sensor 1, a signal processing means 2 for discriminating whether or not acceleration characteristics obtained by the acceleration sensor 1 are approximate to the previously obtained acceleration characteristics in the case of loading the mobile radio telephony equipment on the automobile under traveling, and an acoustic generating means 24 for outputting alarm tone to the telephone set of the opposite side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile telephone system and a mobile radio telephone, and more particularly, to a mobile telephone system for preventing a danger of a car accident, which is a problem when using a telephone while driving a car.

[0002]

2. Description of the Related Art In general, as a risk factor of using a mobile telephone system while driving a car, manual operations for off-hook when making or receiving a call and manual operations when dialing are performed. Movement of the line of sight, one-handed driving by holding the handset, and occurrence of a change in attention due to conversational conditions peculiar to a telephone conversation using the mobile telephone system.

It can be said that the conventional mobile phone accident prevention mechanism has already taken countermeasures against the manual operation at the time of making and receiving a call, the movement of the line of sight, and the operational problems caused by having a handset. However, at present, no measures have been taken against a decrease in attention due to conversational conditions during a call.

[0004] In an experiment by the Saitama Prefectural Police concerning a decrease in attention due to conversation using a mobile telephone system, when a car is driven while talking using the mobile telephone system, it is compared with a case where no conversation is performed. As a result, it has been reported that the attention required for driving is clearly reduced, such as a decrease in the movement of the eyeball and a flattened brain wave (Asahi Shimbun, December 14, 1996, evening edition).

In a conversation with a remote party using a mobile telephone system, the speaker of the other party cannot easily know the situation of the driver. It is not possible to give consideration to the situation, and the speaker while driving must think to hear and respond to the voice regardless of the driving situation.

On the other hand, when talking with a fellow passenger while driving a car, as long as the fellow passenger is not particularly concerned about the driver, the influence of the mobile telephone system as much as during a call is a change in attention. It does not appear. Generally, the driver does not speak unnecessarily to the driver during the operation such as acceleration, control, turning, or the like, or when the vehicle moves up and down due to an irregular road surface until a series of behaviors stops. Therefore, the response depends on whether the other party's speaker can easily know the situation of the driver. This is considered to be the biggest problem in driving.

A vehicle accident prevention mechanism of a mobile telephone radio in a conventional mobile communication system will be described with reference to a block diagram of FIG. This conventional mobile telephone radio,
The off-hook operation, the on-hook operation, and the dial operation are recognized by a voice command using the voice recognition means 32, and a control signal 34 is output.
, The manual operation and the movement of the line of sight are not required, and the decrease in the attention on the operation of the vehicle at the time of calling and receiving is improved. As a countermeasure for avoiding one-handed driving by holding a handset during a call, a fixed-type call microphone 3 and an earpiece speaker 31 having an echo removing unit 33 are used instead of the handle set. Used, the speech microphone output 8a from the speech microphone 3 is input to the echo removing means 33, and the echo removing means 33 is controlled by the input of the received voice 35 from the main device 36 and outputs the voice voice 38. The call voice 38 is supplied to the voice recognition means 32 and the main unit 36, thereby reducing the manual work required for using the mobile telephone radio.

A mobile telephone radio disclosed in Japanese Patent Publication No. 57-160234 (hereinafter referred to as a known example) will be described with reference to a block diagram of FIG. This mobile telephone radio includes traveling detection means 43 for detecting the traveling speed of an automobile on which it is mounted.
Detects that the car is running,
Since the call command 44 of the dial signal generator 40 from the mobile telephone radio is controlled by the switch 41 in accordance with the switch signal 45 from the travel detecting means 43, the dial transmission operation is performed using the switch 41. Refusing. By disabling the transmission operation that requires manual operation and movement of the line of sight as described above, the occurrence of an automobile accident due to the transmission operation while the vehicle is running is prevented.

[0009]

The above-described known mobile telephone radio has a transmission restriction function for restricting a transmission operation while a car is running, and is capable of preventing a traffic accident caused by operation of the mobile telephone radio. It is about to decrease, but it has helped prevent conversational loss of attention.

[0010] Further, in this mobile telephone radio, a problem arises that a calling operation cannot be performed during traveling, irrespective of the driver and the fellow passenger. A traveling detector for detecting the traveling speed is provided on the vehicle side. There is a problem of an increase in the scale of the device and a problem that the transmission control function can be easily stopped because the vehicle speed signal output from the comparison traveling detector can be modified so as to be maintained in a state when the vehicle stops.

[0011] All mobile telephone radios have a function for preventing danger as long as the danger caused by the use of the mobile telephone system extends beyond the user and the user can freely select the mobile telephone radio. And must not be easily stopped by the user's will. For example, in-vehicle navigation devices have a function to restrict operation during traveling, but many users manipulate the signal to detect vehicle speed to restrict operation during traveling. The function has been disabled and the vehicle is being used without any restrictions while driving.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a mobile telephone system which solves the above-mentioned problems and problems, ensures safety when driving a car while talking, and prevents occurrence of an accident.

[0013]

According to the structure of the mobile telephone system of the present invention, a movement detecting means using an acceleration sensor is provided in a mobile radio telephone, and the mobile radio telephone is mounted on a running automobile. When the acceleration characteristic at the time of warning set in advance in the state and the acceleration characteristic obtained from the output of the acceleration sensor are approximated, a warning sound is output to the telephone of the other party during the call. .

In this mobile telephone system, the approximate information includes an amplitude characteristic per frequency of an output of the acceleration sensor and an amplitude per frequency of a predetermined acceleration at the time of a warning when the vehicle is loaded on a running vehicle. It can be obtained by comparing with characteristics.

The structure of the mobile radio telephone according to the present invention is as follows.
It is characterized by comprising an acceleration sensor for measuring the acceleration acting on the wireless device, and transmission means for transmitting output information of the acceleration sensor.

In this mobile radio telephone, there is provided digital signal processing means using a microprocessor for calculating the acceleration characteristic based on the output of the acceleration sensor, and the transmitting means transmits the processing output of the digital signal processing means. When the calculated acceleration characteristic approximates a preset acceleration characteristic at the time of warning in a state where the acceleration characteristic is loaded on a running vehicle, the approximate information can be transmitted. Can be determined by comparing the amplitude characteristic per frequency of the output of the acceleration sensor with the amplitude characteristic per frequency of the acceleration at the time of warning set in a state of being loaded on a running vehicle.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIGS. 1A and 1B are block diagrams illustrating a first embodiment of the present invention. In this mobile telephone system, as shown in FIG. 1A, an acceleration sensor 1 is provided in a mobile telephone radio, and accelerations acting on the X, Y and Z axes acting on the acceleration sensor 1 are quantized, respectively. The acceleration signal 15 is output to the digital signal processing means 2. The A / D conversion circuit 4 quantizes the analog transmission signal 8 obtained from the transmission microphone 3 and outputs the result to the digital signal processing means 2 as a digital transmission signal 9.
The digital signal processing means 2 is mainly composed of a microprocessor and a program.
5 is converted into a scalar quantity, and thereafter, a fast Fourier transform (hereinafter, referred to as FFT), a band-pass filter (hereinafter, referred to as BPF), a low-pass filter (hereinafter, LPF) , A digital filter operation such as a wide-pass filter (hereinafter referred to as LPF), and the amplitude characteristic per frequency of the acceleration signal 15 is calculated. ,Turning,
In a situation in which special attention is required, such as occurrence of wobble and vertical movement, the amplitude characteristic per frequency of the acceleration signal 15 is compared to determine whether or not the acceleration signal 15 is approximated within a certain range.

When the digital signal processing means 2 determines that the signal is approximate, if the state of the line is in the middle of a telephone call, the digital signal processing means 2 adds a warning sound signal to the digital transmission signal 9, and as a digital transmission signal 10, outputs the voice signal compression means 5. At the same time, and outputs the state of the warning control signal 12 to the communication control means 6 as “1”. The communication control means 6 frames the digital compressed transmission signal 11 as voice channel information and outputs it to the modulation circuit 7. If the communication control means 6 is not in the middle of a call, such as during connection preparation, and the state of the warning control signal 12 is "1", the mobile alarm information indicating this is inserted into the control channel information 16 and modulated. Output to the circuit 7. The modulation circuit 7 modulates each information input thereto into an analog signal and outputs the analog signal to a subsequent wireless output circuit.

Next, the operation of the base station will be described with reference to FIG.
This will be described below. The base station transmits uplink control channel information 19
When the mobile object alarm information is confirmed,
In response to the alarm generation command 20, the voice generation means 24 outputs, as the alarm sound signal 21, a message voice signal indicating that the other party preparing for the connection is moving by car or the like in accordance with the alarm generation command 20. .

The adder 25 adds the alarm sound signal 21 to the upstream sound signal 22 if there is a valid signal, and adds the alarm sound signal 21 to the upstream sound signal 21 if there is no valid information in the upstream sound channel information 22. It is output to the network interface circuit 27 as channel information 26. From the above,
A message voice is transmitted to the other party to the mobile telephone radio when the connection preparation is in progress, and a dial tone is transmitted during the call. Note that the message voice is also considered as one of the warning sounds, so that the connection preparation can be made one of the states during the call.

FIGS. 2A and 2B are block diagrams for explaining a second embodiment of the present invention. As shown in FIG. 2 (a), this mobile telephone radio has a digital signal processing means 2.
“a” converts the acceleration signal 15 obtained from the acceleration sensor 1 into a scalar quantity, and outputs it to the communication control means 6 as acceleration information 29. The communication control means 6 inserts the acceleration information 29 into the control channel information, outputs it to the modulation circuit 7, and transmits it to the base station.

The base station transfers the acceleration information of the uplink control channel information 19 from the control means 50 to the digital signal processing means 2a, and the digital signal processing means 2a converts the acceleration information into a digital signal by FFT or BPF, LPF, HPF or the like. Calculate the amplitude characteristics per frequency of the acceleration signal by performing a filter operation, and pay special attention to the calculation results and the occurrence of acceleration, braking, turning, wobbling, vertical movement, etc. when driving a car, which were obtained in advance through experiments. Is compared with the amplitude characteristic per frequency of the acceleration signal 15 to determine whether or not the acceleration signal 15 is approximated within a certain range.

In this case, when it is determined that the signal is approximate, the digital signal processing means 2a outputs a warning generation request signal 30 to the control means 23a, and the control means 23a transmits the warning signal to the telephone line connection via the alarm generation instruction 20a. If the state is in the middle of a call to the mobile telephone line, a message voice indicating that the calling party is moving in a car or the like is output as the alarm sound signal 21 if the state is in the middle of a call. Order.

The adder 25 adds the alarm sound signal 21 to the upstream audio signal 22 if a valid signal exists,
If there is no valid information in the uplink voice channel information A22,
The alarm sound signal 21 is output to the network interface circuit 27 as upstream voice channel information 26. From the above,
The message voice is transmitted to the other party to the mobile telephone radio when the connection is being prepared, and the dial tone is transmitted during the call.

[0025]

As described above, the mobile telephone system according to the present invention is capable of accelerating, braking, turning, moving up and down, etc., when the mobile telephone radio is mounted on a running vehicle.
The driver can detect situations in which the driver should pay particular attention to driving, and can talk to the other party's speaker on the mobile phone radio with a dial tone or voice indicating that the situation is on the mobile phone radio side. It works to actively encourage consideration such as stopping conversation or terminating the call, and has the effect of reducing the risk of driving the vehicle by the driver using the mobile telephone radio.

Further, the mobile telephone system of the present invention can be realized by adding an acceleration sensor and a digital signal processing means to the conventional mobile telephone system. There is an advantage that the present invention can be applied to a mobile phone radio which requires the above. Furthermore, it can be implemented economically at a relatively low cost, and if applied to almost all mobile telephone radios, it is possible to reduce traffic accidents involving the use of mobile telephone radios. Is provided inside the mobile telephone radio, so that there is an advantage that it is not easy to stop the warning function due to the modification.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a mobile radio telephone and a base station according to a first embodiment of the mobile telephone system of the present invention.

FIG. 2 is a block diagram showing a mobile radio telephone and a base station according to a second embodiment of the mobile telephone system of the present invention.

FIG. 3 is a block diagram showing a form of a conventional mobile telephone radio.

FIG. 4 is a block diagram showing a form of a mobile telephone radio set shown in a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Acceleration sensor 2, 2a, 28 Digital signal processing means 3, 3a Transmission microphone 4 A / D converter 5 Voice compression means 6 Communication control means 7 Modulation circuit 8, 8a Analog transmission signal 9, 10 Digital transmission signal 11 Digital compressed transmission signal 12 Warning control signal 13 Voice channel information 14 Modulation signal 15 Acceleration signal 16 Control channel information 17 Received signal 18 Demodulation circuit 19 Up control channel information 20, 20a Alarm generation instruction 21, 21a Alarm sound signal 22, 26 Up Voice signal 23, 22a Control means 25 Adder 27 Network interface circuit 29 Acceleration information 30 Warning request 31 Receiving speaker 32 Voice recognition means 33 Echo removal means 34 Control signal 35 Telephone voice 36 Mobile telephone main unit 37 Antenna 38 Transmission voice From 40 dial Vessel 41 switches 42 mobile telephone main device 43 running detecting means 44 and 46 call instruction 45 off signal

Claims (6)

[Claims] 1. A mobile radio telephone comprising motion detection means using an acceleration sensor, wherein a predetermined warning acceleration characteristic when the mobile radio telephone is loaded on a running automobile and the acceleration sensor A mobile telephone system characterized in that, when the acceleration characteristic obtained from the output of the telephone is approximate, a warning sound is output to the telephone of the other party during the call. 2. The approximate information compares an amplitude characteristic per frequency of an output of an acceleration sensor with an amplitude characteristic per frequency of an acceleration at the time of a warning set in a state of being loaded on a running vehicle. The mobile telephone system according to claim 1, wherein the mobile telephone system is obtained by: 3. A mobile radiotelephone comprising: an acceleration sensor for measuring acceleration acting on a radio; and a transmitting unit for transmitting output information of the acceleration sensor. 4. The digital signal processing device according to claim 3, further comprising digital signal processing means using a microprocessor for calculating an acceleration characteristic based on an output of the acceleration sensor, wherein the transmitting means transmits a processing output of the digital signal processing means. Mobile radio telephone. 5. The moving body according to claim 4, wherein the approximate information is transmitted when the calculated acceleration characteristic approximates a preset acceleration characteristic at the time of warning in a state where the acceleration characteristic is loaded on a running vehicle. Wireless telephone. 6. The approximate information compares an amplitude characteristic per frequency of an output of the acceleration sensor with an amplitude characteristic per frequency of a predetermined acceleration at the time of a warning in a state of being loaded on a running vehicle. The mobile radio telephone according to claim 5, which is obtained by: