JP2006121227A - Communication management system, its communication management method, communication management device, and communication device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a communication management system for enabling a predetermined processing based on detection results of movement of an object in a predetermined space, and decision results that the distance to a second communication device is shorter than a predetermined distance, and to provide a communication management method of the communication management system, a communication management device, and a communication device. <P>SOLUTION: A first communication device comprises a first transmitting section transmitting a signal for calculating the distance to a second communication device, a section for detecting the phase difference between a transmitted signal for calculating the distance and a received signal for calculating the distance, and a section for calculating the distance to the second communication device based on the phase difference. The second communication device comprises a second transmitting section transmitting a signal corresponding to the signal for calculating the distance, a section for judging whether the calculated distance is shorter than a predetermined distance or not, and a sensor for detecting movement of an object in a predetermined space wherein a predetermined processing can be carried based on detection results by the sensor and judgment results that the calculated distance is shorter than a predetermined distance. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a communication management system, a communication management method for a communication management system, a communication management apparatus, and a communication apparatus.

  In recent years, in a vehicle equipped with a function (hereinafter referred to as a smart ignition function) capable of starting / stopping an engine with a key switch without using a key as a communication device that communicates with each other to execute predetermined processing. There are in-vehicle devices and portable devices.

  Hereinafter, communication between an in-vehicle device and a portable device in an automobile equipped with a smart ignition function will be described in detail. It is assumed that the in-vehicle device is provided inside the automobile, for example, and the portable device is possessed by the driver of the automobile. Then, the driver unlocks the door of the car and gets into the car.

  When the control unit provided separately inside the automobile receives a signal based on the fact that the door of the automobile is closed, it determines whether or not to cancel the non-operating state of the key switch for switching the start / stop of the automobile engine. A signal for confirmation is transmitted to the in-vehicle device. When the in-vehicle device receives the signal from the control unit, the in-vehicle device transmits a signal (hereinafter referred to as a signal A) for confirming whether the portable device is in the car. When the portable device is in the automobile, the portable device receives the signal A from the on-vehicle device and transmits a signal B corresponding to the signal A. When the in-vehicle device receives the signal B from the portable device, it determines that the portable device is in the car. Then, the in-vehicle device transmits an instruction signal for releasing the non-operating state of the key switch to the control unit described above. The control unit sets the operation state of the key switch based on the instruction signal from the in-vehicle device. And a driver | operator can start the engine of a motor vehicle by switching the said key switch to the one side, for example. Alternatively, the automobile engine can be stopped by switching the key switch to the other side, for example. The transmission of the signal A from the in-vehicle device is repeatedly performed at a predetermined interval.

  For example, it is assumed that the driver stops the engine of the automobile by switching the key switch to the other side, goes out of the automobile with the portable device, and the signal A from the in-vehicle device is not transmitted to the portable device. Therefore, the signal B from the portable device with respect to the signal A from the on-vehicle device is not transmitted to the on-vehicle device. When the vehicle-mounted device determines that the signal B from the portable device has not been transmitted for a predetermined time after transmitting the signal A, for example, the vehicle-mounted device transmits an instruction signal for causing the key switch to be inoperative. To do. The control unit puts the key switch into an inoperative state based on the instruction signal. Therefore, when the in-vehicle device and the portable device cannot communicate, the key switch can be inactivated.

As described above, in a vehicle equipped with a smart ignition function, if the vehicle-mounted device and the portable device can communicate with each other, it is possible to start and stop the vehicle engine with the key switch described above.
JP 2001-351453 A

  However, it is assumed that the driver goes out of the car with a portable device, for example, with a child or pet who cannot drive the car inside the car. At that time, even if the driver goes out of the car, if the vehicle-mounted device and the portable device can communicate with each other because they are in the vicinity of the car, the key switch described above remains in the operating state. Therefore, there is a possibility that a child or a pet in the automobile starts the automobile engine by switching the key switch to one side. At that time, for example, the child or pet may accidentally step on the accelerator pedal and cause an accident. In this way, even if the driver goes out of the car, if the portable device and the in-vehicle device can communicate with each other, the key switch remains in the operating state, and an accident may occur. It was.

  Therefore, the present invention provides a detection result when the movement of an object in a predetermined space is detected by a sensor provided on the first communication device (for example, in-vehicle device) side, and a second communication device (for example, a portable device). Communication management system, communication management method for communication management system, and communication management that enable predetermined processing to be performed based on the determination result when it is determined that the distance between is less than a predetermined distance An object is to provide a device and a communication device.

  In the invention for solving the above-mentioned problem, a distance between the first communication device and the second communication device is predetermined not more than a distance at which the first communication device and the second communication device can communicate with each other. A communication management system capable of performing a predetermined process when the distance is less than a distance, wherein the first communication device outputs a distance calculation signal for calculating a distance to the second communication device. By receiving a signal corresponding to the distance calculation signal from the first transmission unit to transmit and the second communication device, the distance calculation signal when transmitted, and the distance calculation signal when received A detection unit that detects a phase difference between the signal and the calculation unit that calculates a distance from the second communication device based on the phase difference detected by the detection unit, The second communication device is transmitted from the first communication device A second transmission unit configured to transmit a signal corresponding to the distance calculation signal, and whether the distance to the second communication device calculated by the calculation unit is less than the predetermined distance And a sensor provided on the first communication device side for detecting the movement of the object in the predetermined space, and the sensor detects the movement of the object in the predetermined space. And a determination result when the determination unit determines that the distance between the second communication device calculated by the calculation unit and the second communication device is less than the predetermined distance. Thus, the predetermined processing can be performed.

  Further, when a distance between the first communication device and the second communication device is less than a predetermined distance that is equal to or less than a distance at which the first communication device and the second communication device can communicate, a predetermined distance A communication management system capable of performing processing, wherein the first communication device transmits a distance calculation signal for calculating a distance to the second communication device; By receiving a signal according to the distance calculation signal from the second communication apparatus, the distance calculation signal when transmitted and a signal according to the distance calculation signal when received A detection unit that detects a phase difference, and a calculation unit that calculates a distance between the second communication device and the second communication device based on the phase difference detected by the detection unit; In response to the distance calculation signal transmitted from the first communication device. A first transmitter for transmitting the received signal, and further determining whether or not a distance between the second communication device calculated by the calculator is less than the predetermined distance. A determination unit; a sensor provided on the first communication device side for detecting a human body in a predetermined space; and the human body in the predetermined space detected by the sensor is larger or smaller than a predetermined size. A second discriminating unit for discriminating between the two, and the second discriminating unit discriminates that the human body in the predetermined space detected by the sensor is larger than the predetermined size. A determination result when the first determination unit determines that the distance between the determination result and the second communication device calculated by the calculation unit is less than the predetermined distance; It is possible to perform the predetermined processing based on To, characterized in that.

  Further, when a distance between the first communication device and the second communication device is less than a predetermined distance that is equal to or less than a distance at which the first communication device and the second communication device can communicate, a predetermined distance A communication management method of a communication management system that enables processing, wherein the first communication device transmits a distance calculation signal for calculating a distance to the second communication device, and The second communication device transmits a signal corresponding to the distance calculation signal transmitted from the first communication device, and the first communication device responds to the distance calculation signal from the second communication device. A phase difference between the distance calculation signal when transmitted by receiving the signal and a signal corresponding to the distance calculation signal when received is detected, and the second communication device is detected based on the phase difference. A distance between them, and the calculated second Determining whether the distance to the communication device is less than the predetermined distance, detecting the movement of an object in a predetermined space with a sensor provided on the first communication device side, Discrimination when it is determined that the distance between the detection result when the sensor detects the movement of the object in the predetermined space and the calculated second communication device is less than the predetermined distance The predetermined processing can be performed based on the result.

  A communication management device capable of performing a predetermined process when a distance to the counterpart communication device is less than a predetermined distance equal to or less than a distance capable of communicating with the counterpart communication device; A transmitter that transmits a distance calculation signal for calculating a distance to the counterpart communication device, and a signal corresponding to the distance calculation signal from the counterpart communication device. A detection unit that detects a phase difference between the distance calculation signal when transmitted and a signal corresponding to the distance calculation signal when received, and the phase difference detected by the detection unit Whether or not the distance between the calculation unit that calculates the distance to the counterpart communication device and the counterpart communication device calculated by the calculation unit is less than the predetermined distance. A discriminator for discriminating between the predetermined space The distance between the detection result when the movement of the object is detected by the sensor that detects the movement of the body and the counterpart communication device calculated by the calculation unit is less than the predetermined distance. The predetermined processing can be performed based on the determination result when the determination unit determines.

  Further, the communication device transmits a distance calculation signal for calculating the distance, and receives the signal according to the returned distance calculation signal, thereby transmitting the distance calculation signal when transmitted, The phase difference between the signal corresponding to the distance calculation signal when received and the phase difference between the signal and the transmission position of the signal corresponding to the distance calculation signal is calculated based on the phase difference. A sensor that determines whether or not the distance to the transmission position is less than a predetermined distance that is equal to or less than a distance at which a signal corresponding to the distance calculation signal can be received, and detects the movement of an object in a predetermined space Predetermined processing based on the detection result when the movement of the object is detected and the determination result when the calculated distance to the transmission position is determined to be less than the predetermined distance. The other party's communication that can be done A can communicate with the location, with a transmission unit for transmitting a signal corresponding to the distance-calculation signal transmitted from the other communication device, characterized in that.

  According to the present invention, the distance between the detection result when the movement of the object in the predetermined space is detected by the sensor provided on the first communication device side and the second communication device is determined in advance. It is possible to provide a communication management system, a communication management method for a communication management system, a communication management device, and a communication device that can perform predetermined processing based on a determination result when it is determined that the distance is less than a distance It becomes.

  At least the following matters will become apparent from the description of this specification and the accompanying drawings.

<< Embodiment >>
=== Overall Configuration of Communication Management System, Communication Management Device, and Communication Device ===
A communication management system, a communication management apparatus, and a communication apparatus according to the present invention will be described with reference to FIGS. FIG. 1 is a functional block diagram showing an example of the overall configuration of a communication management system, a communication management device, and a communication device according to the present invention. In the present embodiment, the communication management system, the communication management device, and the communication device will be described as being used for, for example, an automobile equipped with a smart ignition function. The communication management system includes an in-vehicle device 1 (first communication device), a portable device 2 (second communication device), and a sensor 50. The communication management device is used for the in-vehicle device 1, and the counterpart communication device is used for the portable device 2. Further, the communication device is used for the portable device 2 and the counterpart communication device is used for the in-vehicle device 1. FIG. 5 is a diagram illustrating calculation of the distance from the portable device 2 by the in-vehicle device 1 and detection of a moving object (for example, an adult A or a child B) by the sensor 50. The in-vehicle device 1 is provided, for example, in the center of the ceiling inside the automobile, and the portable device 2 is provided, for example, in a key of the automobile. Further, in FIG. 5, when the + Y direction is the front direction of the automobile, the sensor 50 is provided in the center of the windshield of the automobile. The key switch 60 that can switch the start / stop of the engine of the automobile by a switch operation is provided on the front right side, and the seat on which the key switch 60 is provided is a driver's seat.

  In the present embodiment, a low-frequency (for example, 125 kHz) carrier wave is used in signal communication from the in-vehicle device 1 to the portable device 2. Further, in the signal communication from the portable device 2 to the vehicle-mounted device 1, a high frequency (for example, 312 MHz) carrier wave is used. That is, in the communication from the in-vehicle device 1 to the portable device 2, the communication speed is slow because communication is performed with a low-frequency carrier wave. Conversely, in communication from the portable device 2 to the vehicle-mounted device 1, the communication speed is increased because communication is performed using a high-frequency carrier wave. The low frequency with low communication speed is used because the signal phase difference (time difference) between the time when the signal is transmitted from the vehicle-mounted device 1 and the time when the signal is returned via the portable device 2 as described later. This may be intentionally generated). Further, in the case of communication from the portable device 2 to the in-vehicle device 1, by using a high frequency with a high communication speed, the phase difference therebetween can be ignored compared to the phase difference generated during communication from the in-vehicle device 1 to the portable device 2. It will be about. That is, the distance between the in-vehicle device 1 and the portable device 2 can be calculated only with the phase difference intentionally generated in the communication from the in-vehicle device 1 to the portable device 2. Therefore, an intentional low frequency is used for communication from the in-vehicle device 1 to the portable device 2, and a higher frequency is used for communication from the portable device 2 to the in-vehicle device 1.

  Furthermore, in the communication from the vehicle-mounted device 1 to the portable device 2 as described above, communication is performed using a signal subjected to ASK modulation (amplitude shift keying). This is because the transmission unit 7 (the first transmission unit and the first modulation unit) for transmitting a signal from the in-vehicle device 1 to the portable device 2 and the demodulation unit 24 (the first transmission unit) for receiving the signal from the in-vehicle device 1. This is because the circuit configuration of the (2 demodulator) is easy and transmission from the in-vehicle device 1 to the portable device 2 is possible even if there is some interference. In communication from the portable device 2 to the in-vehicle device 1, communication is performed using a signal subjected to FSK modulation (Frequency Shift Keying). This is because a signal subjected to FSK modulation is not easily affected by noise, and can be reliably transmitted without loss of information from the portable device 2 to the in-vehicle device 1. In the present embodiment, communication is performed using an ASK-modulated signal in communication from the in-vehicle device 1 to the portable device 2, and communication is performed using an FSK-modulated signal in communication from the portable device 2 to the on-vehicle device 1. Yes, but not limited to this. For example, signal confidentiality can be enhanced, and communication from the in-vehicle device 1 to the portable device 2 and communication from the portable device 2 to the in-vehicle device 1 can be performed with a spread spectrum that has a remarkably high ability to eliminate interference waves and interference waves. It is also possible to do this.

  The sensor 50 detects the movement of an object in the automobile. The sensor 50 transmits a detection signal to a CPU (Central Processing Unit) 3 (detection unit, calculation unit, determination unit) of the in-vehicle device 1 when detecting the movement of the object in the automobile. As the sensor 50 in the present embodiment, a well-known sensor that can detect the movement of an object within a range of an automobile can be used. Therefore, for example, an infrared sensor, a weight sensor, or the like can be used. In the present embodiment, for example, an infrared sensor is used as the sensor 50. In that case, a transmitter (not shown) for transmitting infrared rays is provided in the center of the windshield, and an infrared receiver (not shown) is provided in the driver's seat and the passenger seat. And if the receiving part of a driver seat and a passenger seat receives the infrared rays from a transmission part, the sensor 50 will discriminate | determine that there is no object in a driver seat and a passenger seat. For example, when only the receiving part of the driver's seat receives infrared rays from the transmitting part, the sensor 50 determines that there is an object in the passenger seat and transmits the determination result to the CPU 3 as a detection signal.

  The in-vehicle device 1 includes a CPU 3, a counter 4, a timer 5, a flash memory 6 (storage unit), a transmission unit 7, a reception unit 8 (first demodulation unit), a transmission antenna 9, a reception antenna 10, and an OSC 26 (oscillator circuit: Oscillator). have.

  The transmitter 7 performs ASK modulation on the signal from the CPU 3 with a carrier wave having a frequency of 125 kHz.

  The transmission antenna 9 transmits the signal subjected to ASK modulation by the transmission unit 7.

  The receiving antenna 10 receives an FSK modulated signal from the portable device 2.

  The receiving unit 8 demodulates the FSK-modulated signal from the portable device 2 received by the receiving antenna 10.

  The CPU 3 is provided for overall control of the in-vehicle device 1. The flash memory 6 stores in advance program data for the CPU 3 to perform processing to be described later. The Flash memory 6 is composed of a nonvolatile memory element that can repeatedly write and read data by electrically erasing the data.

  The timer 5 measures time based on an instruction from the CPU 3.

  The OSC 26 transmits a clock (CLK0) having a predetermined frequency to the CPU 3.

  Based on an instruction from the CPU 3, the counter 4 starts from the rise of a signal (hereinafter referred to as a distance calculation signal) for calculating the distance from the in-vehicle device 1 to the portable device 2 transmitted from the CPU 3 to the transmission unit 7. For example, the rising edge of the clock from the OSC 26 is counted. The counter 4 counts the rising edge of the clock from the OSC 26 until the rising edge of the distance calculation signal demodulated by the receiving unit 8. The count value of the counter 4 is reset based on an instruction from the CPU 3.

  The CPU 3 transmits a signal (hereinafter referred to as a key switch operation confirmation signal) for confirming whether or not to activate the key switch 60 from a controller (not shown) provided separately in the automobile. The CPU 3 transmits a detection signal from the sensor 50. When the CPU 3 receives the detection signal from the sensor 50, the CPU 3 transmits a signal (hereinafter referred to as an inverter operation instruction signal) for setting the inverter 21 (reply unit) to an operation state to the transmission unit 7. Further, the CPU 3 transmits the distance calculation signal described above to the transmission unit 7 and resets the counter 4 to start counting. Further, the CPU 3 resets the timer 5 to start measuring time. When receiving the distance calculation signal from the portable device 2 demodulated by the receiving unit 8, the CPU 3 reads the count value of the counter 4. The CPU 3 calculates the distance from the in-vehicle device 1 to the portable device 2 based on the count value. That is, the count value indicating the phase difference between the two signals from the time when the distance calculation signal is transmitted to the transmitter 7 to the time when the distance calculation signal is returned via the portable device 2 is obtained. The distance from the machine 1 to the portable machine 2 can be calculated. For example, when the frequency of the clock from the OSC 26 is 15.75 kHz, the count value of the counter 4 when the distance calculation signal is returned via the portable device 2 is 250. The phase difference is about 15.87 (msec). It is assumed that the distance from the vehicle-mounted device 1 to the portable device 2 when the phase difference is about 15.87 (msec) is about 1 (m), for example, from an experiment. The distance data corresponding to the count value obtained from this experiment is stored in advance in the Flash memory 6 as table data, for example. The CPU 3 determines whether or not the calculated distance is less than a predetermined distance (for example, 1 m). When the CPU 3 determines that the calculated distance is less than a predetermined distance (1 m), the CPU 3 instructs the above-described control unit to put the key switch 60 into an operating state (hereinafter referred to as a key switch operation instruction signal). ). The CPU 3 transmits a signal (hereinafter referred to as an inverter non-operation instruction signal) for making the inverter 21 non-operational to the transmission unit 7. Note that these functions of the CPU 3 are realized by the CPU 3 executing the program based on the result of decoding the program data read from the flash memory 6 described above. The CPU 3 includes an address counter (not shown) that specifies an address of the flash memory 6, a program logic array (not shown) that decodes program data read from the flash memory 6, an arithmetic logic unit (not shown) that performs logical operations, It has a register (not shown) for temporarily storing data.

  The portable device 2 includes a CPU 11, a Flash memory 13, a demodulation unit 24, a modulation unit 25 (second transmission unit, second modulation unit), a reception antenna 18, a transmission antenna 19, and inverters 20, 21, and 22.

  The receiving antenna 18 receives an ASK-modulated signal from the in-vehicle device 1.

  The demodulator 24 is composed of, for example, RF 16 (Radio Frequency) and DET 14 (Detector). The demodulator 24 demodulates the ASK-modulated signal from the receiving antenna 18.

  The modulation unit 25 includes, for example, an RF 17 and a modulator 15. The modulation unit 25 performs FSK modulation on the signal from the CPU 11 with a carrier wave having a frequency of 312 MHz. Further, the modulation unit 25 performs FSK modulation of the signal from the demodulation unit 24 with a carrier wave having a frequency of 312 MHz when the inverter 21 is in an operating state according to an instruction from the CPU 11.

  The transmission antenna 19 transmits the signal that has been FSK modulated by the modulation unit 25.

  The CPU 11 is provided for overall control of the portable device 2. The flash memory 13 stores in advance program data for the CPU 11 to perform processing to be described later. The flash memory 13 is composed of a nonvolatile memory element that can repeatedly write and read data by electrically erasing the data.

  When the CPU 11 transmits the inverter operation instruction signal from the vehicle-mounted device 1 demodulated by the demodulator 24 and determines that the inverter operation instruction signal has been transmitted, the CPU 11 sets the inverter 21 in an operation state. Therefore, the signal from the in-vehicle device 1 demodulated by the demodulator 24 is FSK modulated by the modulator 25 as it is without being processed, and can be transmitted from the transmission antenna 19. When the CPU 11 determines that the inverter non-operation instruction signal is transmitted from the in-vehicle device 1 demodulated by the demodulator 24 and the inverter non-operation instruction signal is transmitted, the CPU 11 sets the inverter 21 to the non-operation state. Note that these functions of the CPU 11 are realized by the CPU 11 executing the program based on the result of decoding the program data read from the flash memory 13 described above. The CPU 11 includes an address counter (not shown) that specifies an address of the flash memory 13, a program logic array (not shown) that decodes program data read from the flash memory 13, an arithmetic logic unit (not shown) that performs a logical operation, an arithmetic operation It has a register (not shown) for temporarily storing data.

=== Operation of Communication Management System ===
The operation of the communication management system, the communication management device, and the communication device according to the present invention will be described with reference to FIGS. FIG. 2 is a flowchart showing an example of operations of the communication management system, the communication management device and the counterpart communication device, and the communication device and the counterpart communication device according to the present invention. FIG. 3 is a timing chart showing an example of operations of the communication management system, the communication management device and the counterpart communication device, and the communication device and the counterpart communication device according to the present invention. FIG. 4 is a diagram illustrating changes in the distance calculation signal. FIG. 3 shows that the signal described in the left column is transmitted when the level is high. In practice, the signal transmitted from the in-vehicle device 1 to the portable device 2 is an ASK-modulated signal in the transmission unit 7, and the signal transmitted from the portable device 2 to the in-vehicle device 1 is FSK modulated in the modulation unit 25. Signal. Further, for the sake of convenience, the description will be made assuming that one high level of the left column / in-vehicle device 1 distance calculation signal in FIG. 3 indicates the waveform of the left column / distance calculation signal (transmission) in FIG.

  First, the operations of the communication management system, the communication management device and the counterpart communication device, and the communication device and the counterpart communication device according to the present invention when the adult A and the child B shown in FIG. 5 are in the vehicle will be described. It is assumed that the communicable range between the in-vehicle device 1 and the portable device 2 is within the broken line a shown in FIG. Further, the range based on the predetermined distance for the CPU 3 to determine whether or not the portable device 2 is less than the predetermined distance is within the broken line b shown in FIG. And It is assumed that the inverter 21 is in an inoperative state. The portable device 2 is assumed to be owned by an adult A.

  For example, when an adult A and a child B get into a car and close the door, a control unit (not shown) separately provided in the car receives a signal based on the fact that the car door is closed. The control unit transmits a key switch operation confirmation signal to the CPU 3 based on the signal. Assume that the adult A gets on the driver's seat side where the key switch 60 is provided, and the child B gets on the passenger seat side.

  When the CPU 3 receives the key switch operation confirmation signal from the control unit (YES in S101), the CPU 3 determines whether or not a detection signal is transmitted from the sensor 50 (S102).

  As described above, the sensor 50 determines whether or not the object is in the driver seat and the passenger seat depending on whether or not the receivers provided in the driver seat and the passenger seat receive the infrared rays from the transmitter. At this time, when the adult A and the child B get on the driver seat and the passenger seat, the sensor 50 receives no infrared rays from the transmitter, and the sensor 50 indicates that the object is in the driver seat and the passenger seat. Determine. Then, the sensor 50 transmits a detection signal based on the determination result to the CPU 3.

  When determining that the detection signal from the sensor 50 has been received (S102, YES), the CPU 3 transmits an inverter operation instruction signal to the transmission unit 7 (S103). The transmitter 7 ASK modulates the inverter operation instruction signal with a carrier wave of 125 kHz. Then, the inverter operation instruction signal ASK-modulated by the transmission unit 7 is transmitted via the transmission antenna 9 (FIG. 3, vehicle-mounted device 1 inverter operation instruction signal).

  When the receiving antenna 18 of the portable device 2 receives the ASK-modulated inverter operation instruction signal, the demodulator 24 demodulates the ASK-modulated inverter operation instruction signal. When the CPU 11 determines that the inverter operation instruction signal demodulated by the demodulator 24 has been transmitted (S201: YES), the CPU 11 sets the inverter 21 in an operating state (S202, FIG. 3, inverter 21).

  When the CPU 3 transmits the inverter operation instruction signal described above, the CPU 3 transmits a distance calculation signal (FIG. 4, distance calculation signal (transmission)) to the transmission unit 7 (S104). At this time, the CPU 3 resets the counter 4 and causes the counter 4 to start counting from the rise of the distance calculation signal. Further, the CPU 3 resets the timer 5 to start timing. Then, the CPU 3 determines whether or not the distance calculation signal from the portable device 2 demodulated by the receiving unit 8 is transmitted (S105). The transmitter 7 ASK-modulates the distance calculation signal with a carrier wave having a frequency of 125 kHz (FIG. 4, ASK). The distance calculation signal ASK-modulated by the transmission unit 7 is transmitted via the transmission antenna 9 (FIG. 3, vehicle-mounted device 1 distance calculation signal).

  When the reception antenna 18 of the portable device 2 receives the ASK-modulated distance calculation signal, the demodulation unit 24 demodulates the ASK-modulated distance calculation signal. At this time, the distance calculation signal from the vehicle-mounted device 1 demodulated by the demodulator 24 is transmitted to the modulator 25 as it is because the inverter 21 is in an operating state (S203). The modulation unit 25 performs FSK modulation on the distance calculation signal from the demodulation unit 24 with a carrier wave having a frequency of 312 MHz (FIG. 4, FSK). The distance calculation signal that has been FSK modulated by the modulation unit 25 is transmitted via the transmission antenna 19 (FIG. 3, portable device 2 distance calculation signal).

  When the receiving antenna 10 of the in-vehicle device 1 receives the FSK-modulated distance calculation signal, the receiving unit 8 demodulates the FSK-modulated distance calculation signal (FIG. 4, distance calculation signal (reception)). When the CPU 3 determines that the distance calculation signal from the portable device 2 demodulated by the receiving unit 8 is transmitted (YES in S105), the CPU 3 reads the count value of the counter 4. Then, the CPU 3 calculates the distance from the in-vehicle device 1 to the portable device 2 based on the count value (S106). As described above, in communication from the in-vehicle device 1 to the portable device 2, a low-frequency 125 kHz carrier wave is used. In communication from the portable device 2 to the vehicle-mounted device 1, a carrier wave of 312 MHz, which is a high frequency, is used. Therefore, the phase difference in communication from the portable device 2 to the in-vehicle device 1 is negligible compared to the phase difference generated during communication from the in-vehicle device 1 to the portable device 2. Therefore, an intentional phase difference T1 (FIG. 4) occurs between the distance calculation signal transmitted from the CPU 3 to the transmission unit 7 and the distance calculation signal demodulated by the reception unit 8 by using a low frequency of 125 kHz. It will be. Therefore, the count value read by the CPU 3 described above indicates the phase difference T1. Then, the CPU 3 reads the distance corresponding to the count value obtained from the experiment stored as table data in the Flash memory 6. Therefore, the CPU 3 can calculate the distance from the in-vehicle device 1 to the portable device 2 using the count value indicating the phase difference. Then, the CPU 3 determines whether or not the portable device 2 is less than a predetermined distance (for example, 1 m) (S107). The less than the predetermined distance at this time indicates that the distance is less than the predetermined distance from the vehicle-mounted device 1, and is within the range indicated by the broken line b in FIG. A range indicated by a broken line b that is less than a predetermined distance from the in-vehicle device 1 is smaller than a range indicated by a broken line a that is a communicable range between the in-vehicle device 1 and the portable device 2. Originally, as described above, when the in-vehicle device 1 and the portable device 2 can communicate with each other (that is, within the communicable range), the key switch 60 becomes an operating state. However, for example, even when the adult A leaves the car with the portable device 2 and is in the range from the range indicated by the broken line b to the range indicated by the broken line a, the key switch 60 is in the operating state. It becomes. At this time, for example, when the child B switches the key switch 60 which is in an operating state, the engine may start and an accident may occur. Therefore, the range indicated by the broken line b, which is the range in which the adult A with the portable device 2 is surely in the car, is determined as a range that is less than a predetermined distance. In the present embodiment, as shown in FIG. 5, the range indicated by the broken line b centering on the vehicle-mounted device 1 is provided as a range less than a predetermined distance, but the present invention is not limited to this. For example, if the predetermined distance is provided at a shorter distance than that of the present embodiment and the portable device 2 is within the range consisting of the short distance, the CPU 3 indicates that the portable device 2 is less than the predetermined distance. May be provided to discriminate. By doing so, the position where the portable device 2 is placed in the car is determined. For example, the adult A puts the portable device 2 in a dashboard (not shown) that is not within the short distance range described above, It is also possible to leave the car by locking the dashboard. In addition, since the position where the portable device 2 is placed is determined, it is possible to prevent the portable device 2 itself from being lost.

  When the CPU 3 determines that the portable device 2 is less than the predetermined distance (YES in S107), the CPU 3 transmits a key switch operation instruction signal to the above-described control unit (S108. FIG. 3: In-vehicle device 1 key switch operation instruction) signal). The control unit activates the key switch 60 based on the key switch operation instruction signal from the CPU 3 (FIG. 3, key switch). Further, the CPU 3 transmits an inverter non-operation instruction signal to the transmission unit 7 (S109). The transmitter 7 performs ASK modulation on the inverter non-operation instruction signal with a carrier wave of 125 kHz. And the inverter non-operation instruction | indication signal ASK-modulated by the transmission part 7 is transmitted via the transmission antenna 9 (FIG. 3, vehicle equipment 1 inverter non-operation instruction | indication signal). For example, when the adult A loses the portable device 2, for example, a spare key of the automobile is inserted into the keyhole. At this time, the CPU 3 receives a signal based on the fact that the spare key is inserted into the keyhole (S110 / YES). Then, the CPU 3 may be provided so as to transmit a key switch operation instruction signal to the control unit based on the signal.

  When the receiving antenna 18 of the portable device 2 receives the ASK-modulated inverter non-operation instruction signal, the demodulator 24 demodulates the ASK-modulated inverter non-operation instruction signal. When the CPU 11 determines that the inverter non-operation instruction signal demodulated by the demodulator 24 has been transmitted (S204: YES), the CPU 11 sets the inverter 21 in the non-operation state (S205, FIG. 3, inverter 21).

  As described above, when the adult A having the portable device 2 is within a predetermined distance from the vehicle-mounted device 1, the key switch 60 can be brought into an operating state. Therefore, the adult A can start the engine by switching the key switch 60 to one side, for example, and can drive the automobile. Further, the engine can be stopped by switching the key switch 60 to the other side, for example.

  Next, referring to FIG. 6, the operation of the communication management system, the communication management device and the counterpart communication device, and the communication device and the counterpart communication device according to the present invention when the adult A in FIG. Will be described. FIG. 6 is a diagram illustrating changes in the distance calculation signal. It is assumed that the adult A goes out of the car and is within the communicable range (the broken line a) between the in-vehicle device 1 and the portable device 2.

  For example, when the adult A leaves the car and closes the door while the child B is placed in the car, the control unit described above receives a signal based on the fact that the door of the car is closed. The control unit transmits a key switch operation confirmation signal to the CPU 3 based on the signal.

  When the CPU 3 receives the key switch operation confirmation signal from the control unit (YES in S101), the CPU 3 determines whether or not a detection signal is transmitted from the sensor 50 (S102).

  As described above, the sensor 50 determines whether or not the object is in the driver's seat and the passenger's seat depending on whether or not the receivers provided in the driver's seat and the passenger's seat receive the infrared rays from the transmitter. At this time, since the child B remains in the passenger seat, the sensor 50 does not receive the infrared rays from the transmission unit at the reception unit on the passenger seat side, and the sensor 50 determines that the object is in the passenger seat. . Then, the sensor 50 transmits a detection signal to the CPU 3 based on the determination result.

When determining that the detection signal from the sensor 50 has been received (S102, YES), the CPU 3 transmits an inverter operation instruction signal to the transmission unit 7 (S103). The transmitter 7 ASK modulates the inverter operation instruction signal with a carrier wave of 125 kHz. Then, the inverter operation instruction signal ASK-modulated by the transmission unit 7 is transmitted via the transmission antenna 9 (FIG. 3, vehicle-mounted device 1 inverter operation instruction signal).

  When the receiving antenna 18 of the portable device 2 receives the ASK-modulated inverter operation instruction signal, the demodulator 24 demodulates the ASK-modulated inverter operation instruction signal. When the CPU 11 determines that the inverter operation instruction signal demodulated by the demodulator 24 has been transmitted (S201: YES), the CPU 11 sets the inverter 21 in an operating state (S202, FIG. 3, inverter 21).

  When the CPU 3 transmits the inverter operation instruction signal described above, the CPU 3 transmits a distance calculation signal (FIG. 4, distance calculation signal (transmission)) to the transmission unit 7 (S104). At this time, the CPU 3 resets the counter 4 and causes the counter 4 to start counting from the rise of the distance calculation signal. Further, the CPU 3 resets the timer 5 to start timing. Then, the CPU 3 determines whether or not the distance calculation signal from the portable device 2 demodulated by the receiving unit 8 is transmitted (S105). The transmitter 7 ASK-modulates the distance calculation signal with a carrier wave having a frequency of 125 kHz (FIG. 4, ASK). The distance calculation signal ASK-modulated by the transmission unit 7 is transmitted via the transmission antenna 9 (FIG. 3, vehicle-mounted device 1 distance calculation signal).

  When the reception antenna 18 of the portable device 2 receives the ASK-modulated distance calculation signal, the demodulation unit 24 demodulates the ASK-modulated distance calculation signal. At this time, the distance calculation signal from the vehicle-mounted device 1 demodulated by the demodulator 24 is transmitted to the modulator 25 as it is because the inverter 21 is in an operating state (S203). The modulation unit 25 performs FSK modulation on the distance calculation signal from the demodulation unit 24 with a carrier wave having a frequency of 312 MHz (FIG. 4, FSK). The distance calculation signal FSK-modulated by the modulation unit 25 is transmitted via the transmission antenna 19 (FIG. 3, portable device 2 distance calculation signal).

  When the receiving antenna 10 of the vehicle-mounted device 1 receives the FSK-modulated distance calculation signal, the receiving unit 8 demodulates the FSK-modulated distance calculation signal. When the CPU 3 determines that the distance calculation signal from the portable device 2 demodulated by the receiving unit 8 is transmitted (YES in S105), the CPU 3 reads the count value of the counter 4. Then, the CPU 3 calculates the distance from the in-vehicle device 1 to the portable device 2 based on the count value (S106). The calculation of the distance from the in-vehicle device 1 to the portable device 2 by the CPU 3 at this time is as described above. However, as shown in FIG. 5, the distance from the in-vehicle device 1 of the adult A who has the portable device 2 is clearly longer than that in the automobile. Therefore, the phase difference between the distance calculation signal when the portable device 2 receives the signal and the distance calculation signal when the vehicle-mounted device 1 receives the phase difference T2 is larger than the phase difference T1 described above. This is because, as described above, in communication from the in-vehicle device 1 to the portable device 2, communication is performed by performing ASK modulation with a carrier wave having a low frequency of 125 kHz. Therefore, the communication speed from the in-vehicle device 1 to the portable device 2 is slow, and T2 that is a phase difference larger than the phase difference T1 is generated. At this time, the count value of the counter 4 read by the CPU 3 indicates the phase difference T2. Therefore, the CPU 3 calculates the distance from the in-vehicle device 1 to the portable device 2 using the count value indicating the phase difference T2. The count value indicating the phase difference T2 is larger than the count value indicating the phase difference T1. That is, as shown in FIG. 5, the distance from the onboard device 1 to the portable device 2 calculated by the CPU 3 based on the count value indicating the phase difference T2 is longer than the distance calculated based on the count value indicating the phase difference T1. It is a distance.

  And CPU3 discriminate | determines whether the portable device 2 is less than the predetermined distance from the vehicle equipment 1 based on the calculated distance (S107). However, since the distance calculated by the CPU 3 is also a long distance when the adult A is in the car as described above, the CPU 3 determines that the distance is not less than a predetermined distance (S107).・ NO).

  Therefore, when the adult A with the portable device 2 is not less than a predetermined distance from the vehicle-mounted device 1, the key switch 60 remains in an inoperative state. Therefore, for example, even when the child B touches the key switch 60, the key switch 60 does not operate, and it is possible to prevent an accident.

  According to the present embodiment, the CPU 3 determines that the detection result when the movement of the object in the predetermined space is detected by the sensor 50 and the distance between the portable device 2 is less than a predetermined distance. Based on the determination result, it is possible to perform a predetermined process. Therefore, the key switch 60 can be brought into an operating state only when a person moving in the automobile is detected and the distance from the portable device 2 is less than a predetermined distance.

  The detection result when the sensor 50 detects the movement of the object in the predetermined space and the determination result when the CPU 3 determines that the distance to the portable device 2 is equal to or greater than a predetermined distance. Based on the above, it becomes possible not to perform a predetermined process. Therefore, even when a person moving in the car is detected, when the CPU 3 determines that the portable device 2 is not less than a predetermined distance, the key switch 60 can be made inoperative. It becomes.

  Further, the distance calculation signal from the vehicle-mounted device 1 can be returned as it is by the inverter 21. Therefore, the CPU 3 calculates the distance between the portable device 2 from the transmitted distance calculation signal and the same distance calculation signal as the distance calculation signal transmitted from the in-vehicle device 1 returned from the portable device 2. Therefore, it is possible to calculate an accurate distance with certainty.

  Further, in communication from the in-vehicle device 1 to the portable device 2, a phase difference can be intentionally generated by performing communication using a low-frequency carrier wave. Further, in the communication from the portable device 2 to the in-vehicle device 1, the phase difference is negligible compared to the phase difference caused by the communication from the in-vehicle device 1 to the portable device 2 by performing communication with a high frequency carrier wave. Can do. That is, the CPU 3 can calculate the distance to the portable device 2 based on the phase difference intentionally generated in the communication from the in-vehicle device 1 to the portable device 2.

  In addition, in communication from the vehicle-mounted device 1 that performs communication using a low-frequency carrier wave to the portable device 2, the circuit configuration is facilitated by using ASK modulation suitable for modulation using the low-frequency carrier wave, and interference may occur to some extent. Transmission from the in-vehicle device 1 to the portable device 2 becomes possible. In the communication from the portable device 2 that communicates with the high frequency carrier wave to the in-vehicle device 1, the FSK modulation suitable for the modulation with the high frequency carrier wave is used, so that it is less affected by noise, and the portable device 2 is mounted on the vehicle It is possible to reliably transmit information to the machine 1 without loss.

  Further, by performing communication by spread spectrum in communication from the in-vehicle device 1 to the portable device 2 and communication from the portable device 2 to the in-vehicle device 1, the confidentiality of the signal transmitted by the spread spectrum is increased. In addition, the ability to eliminate interference waves, interference waves, etc. can be significantly increased.

  In addition, a timer 5 for detecting a phase difference, a counter 4 that counts with a clock having a predetermined frequency, and information on which the CPU 3 calculates a distance from the portable device 2 based on the count value are stored. It is possible to reliably perform the calculation of the distance between the CPU 3 and the portable device 2 by using the existing Flash memory 6. Further, the timer 5 and the counter 4 are reset every time the CPU 3 transmits a distance calculation signal, so that the distance calculation signal when the CPU 3 transmits and the distance calculation transmitted by the vehicle-mounted device 1 when received. The CPU 3 can reliably calculate the distance from the portable signal 2 to the same distance calculation signal as the signal for use.

  Furthermore, the determination when the sensor 50 detects the movement of the object in the vehicle and the CPU 3 determines that the portable device 2 is in the vehicle based on the distance to the portable device 2. Based on the result, the key switch 60 that operates to start or stop the engine of the automobile can be put into an operating state. Also, when the sensor 50 detects the movement of an object in the vehicle and the CPU 3 determines that the portable device 2 is not in the vehicle based on the distance from the portable device 2. Based on the result, the key switch 60 can be inactivated.

=== Other Embodiments ===
As described above, the present invention includes the case where the sensor 50 detects an object and the distance from the in-vehicle device 1 to the portable device 2 is less than a predetermined distance and the distance is equal to or more than the predetermined distance. The communication management system, the communication management apparatus and the counterpart communication apparatus, and the operations of the communication apparatus and the counterpart communication apparatus have been described. The above description is for facilitating the understanding of the present invention. It is not limited. The present invention can be changed and improved without departing from the gist thereof.

<< Other forms of sensor >>
In the present embodiment, the sensor 50 capable of detecting the movement of the object in the automobile is provided, but the present invention is not limited to this.

  For example, a sensor for detecting a human body in an automobile (hereinafter referred to as a human body sensor) as shown in Japanese Patent Application Laid-Open No. 10-6809 is provided, and a human body in the automobile detected by the human body sensor is You may provide so that CPU3 may discriminate | determine whether it is large or small with respect to the defined magnitude | size.

  In this case, data indicating the human body detected by the human body sensor (the reflection coefficient for a certain high frequency (30 MHz to 50 MHz) according to the above-mentioned published patent publication) is transmitted to the CPU 3. The flash memory 6 stores data indicating a predetermined human body (for example, when a human body sensor of a standard 18-year-old man and woman who can obtain a driver's license for a car is detected by a human sensor. Average data) is stored. When the CPU 3 determines that data indicating the human body from the human body sensor has been transmitted, the CPU 3 compares the data with predetermined data stored in the Flash memory 6. At this time, when the CPU 3 determines that the data indicating the human body from the human body sensor is larger than the predetermined data stored in the flash memory 6, the CPU 3 sends the above inverter operation instruction to the transmission unit 7. Send. When the CPU 3 determines that the portable device 2 is less than the predetermined distance as described above, the CPU 3 can activate the key switch 60 and start / stop the engine of the automobile. Further, for example, when a human sensor detects a standard infant (the standard infant is a human body that becomes data indicating a human body that is extremely smaller than the average data of the standard 18-year-old man and woman described above. ), The CPU 3 determines that it is much smaller than the predetermined data stored in the Flash memory 6. At that time, the CPU 3 does not perform processing to operate the key switch 60, the key switch 60 remains in an inoperative state, and it is possible to reliably prevent an accident caused by the infant operating the key switch 60. .

<< Application of communication management system, communication management apparatus, communication apparatus >>
In this embodiment, the communication management system, the communication management device, and the communication device are used in an automobile equipped with a smart ignition function, but the application target of the present invention is not limited to this.

  For example, even when the person with the portable device 2 is less than a predetermined distance, the gas switch for igniting the gas and the faucet for flowing water from the water supply can be used for the system kitchen. good. In that case, a control device and a sensor having the same function as the vehicle-mounted device 1 are provided in the system kitchen. Then, when the adult possesses the portable device 2 and the sensor detects the moving object (adult carrying the portable device 2), and the control device determines that the adult is less than a predetermined distance from the system kitchen. Only the gas switch and faucet described above can be operated. Further, it is assumed that an adult having the portable device 2 is separated by a distance equal to or greater than a predetermined distance, although it is less than the distance at which the control device and the portable device 2 can communicate. It is assumed that the child is in the vicinity of the system kitchen. In this case, the sensor detects a moving object (child). And a control apparatus transmits the signal for distance calculation mentioned above for discriminating whether portable machine 2 is less than a predetermined distance from a system kitchen. Based on the distance calculation signal from the portable device 2, the control device calculates the distance to the portable device 2 as described above. And if a control apparatus discriminate | determines that the portable device 2 exists more than the predetermined distance, it will leave a gas switch and a faucet in a non-operation state. Therefore, it is possible to prevent an accident such as a child in the vicinity of the system kitchen pressing a gas switch to ignite and cause a fire, or twisting the faucet and continuing to discharge water.

It is a figure which shows an example of the whole structure of the communication management system which concerns on this invention, a communication management apparatus, and a communication apparatus. It is a flowchart which shows an example of operation | movement of the communication management system which concerns on this invention, a communication management apparatus, the other party communication apparatus, a communication apparatus, and the other party communication apparatus. It is a timing chart which shows an example of operation | movement of the communication management system which concerns on this invention, a communication management apparatus, the other party communication apparatus, a communication apparatus, and the other party communication apparatus. It is a figure which shows the change of the signal for distance calculation. It is a figure which shows the calculation of the distance with the portable device 2 by the vehicle equipment 1, and the detection of the moving object by the sensor 50. FIG. It is a figure which shows the change of the signal for distance calculation.

Explanation of symbols

1 In-vehicle device 2 Portable device 3, 11 CPU
4 Counter 5 Timer 6 and 13 Flash memory 7 Transmitter 8 Receiver 9 and 19 Transmit antenna 10 and 18 Receive antenna 14 DET
15 Modulator 16, 17 RF
20, 21, 22 Inverter 24 Demodulator 25 Modulator 26 OSC
50 sensors 60 key switches

Claims (12)

When the distance between the first communication device and the second communication device is less than a predetermined distance that is equal to or less than a distance that enables communication between the first communication device and the second communication device, a predetermined process is performed. A communication management system capable of performing
The first communication device is
A first transmitter that transmits a distance calculation signal for calculating a distance to the second communication device;
By receiving a signal according to the distance calculation signal from the second communication apparatus, the distance calculation signal when transmitted and a signal according to the distance calculation signal when received A detection unit for detecting a phase difference;
A calculation unit that calculates a distance from the second communication device based on the phase difference detected by the detection unit;
The second communication device is
A second transmitter that transmits a signal corresponding to the distance calculation signal transmitted from the first communication device;
Furthermore, a determination unit that determines whether or not a distance between the second communication device calculated by the calculation unit is less than the predetermined distance;
A sensor provided on the first communication device side for detecting the movement of an object in a predetermined space,
The distance between the detection result when the sensor detects the movement of the object in the predetermined space and the second communication device calculated by the calculation unit is less than the predetermined distance. And based on the determination result when the determination unit determines, it is possible to perform the predetermined processing,
A communication management system characterized by that. The distance between the detection result when the movement of the object in the predetermined space is detected by the sensor and the second communication device calculated by the calculation unit is greater than or equal to the predetermined distance. Based on the determination result when the determination unit determines that there is, the predetermined processing is not performed,
The communication management system according to claim 1. The second communication device is
A reply unit for returning the distance calculation signal transmitted from the first communication device;
The detector is
By receiving the distance calculation signal returned by the reply unit, a phase difference between the distance calculation signal when transmitted and the distance calculation signal when received is detected,
The communication management system according to claim 1 or 2, characterized by the above. The first communication device is
A first modulation unit that modulates the distance calculation signal with a carrier wave of a first frequency; and the distance calculation signal modulated by a carrier wave of a second frequency higher than the first frequency from the second communication device. A first demodulator that demodulates the signal,
The second communication device is
A second demodulation unit that demodulates the distance calculation signal modulated by the first modulation unit from the first communication device; and a second demodulation unit that demodulates the distance calculation signal demodulated by the second demodulation unit. A second modulation unit that modulates with a carrier wave having a frequency of
The communication management system according to any one of claims 1 to 3, wherein The first modulation unit performs ASK modulation on the distance calculation signal with a carrier wave of the first frequency,
The second demodulator demodulates the distance calculation signal ASK-modulated by the first modulator from the first communication device,
The second modulation unit FSK-modulates the distance calculation signal demodulated by the second demodulation unit with a carrier wave of the second frequency,
The first demodulator demodulates the distance calculation signal FSK modulated by the second modulator from the second communication device.
The communication management system according to claim 4. To perform communication between the first communication device and the second communication device using spread spectrum,
The first modulation unit first-modulates the distance calculation signal with a carrier wave having the first frequency, and then second-orders (spreads) the distance calculation signal first-order modulated with the carrier wave having the first frequency. ) Modulate and
The second demodulator despreads and demodulates the distance calculation signal that is second-order (spread) modulated by the first modulator from the first communication device,
The second modulation unit first modulates the distance calculation signal despread and demodulated by the second demodulation unit with the carrier wave of the second frequency, and then 1 with the carrier wave of the second frequency. Second-order (spreading) modulation of the distance-modulated signal for distance calculation,
The first demodulator despreads and demodulates the distance calculation signal that is second-order (spread) modulated by the second modulator from the second communication device.
The communication management system according to claim 4. The first communication device is
A timer that counts a time until the first communication device receives the distance calculation signal that is reset each time the first transmission unit transmits the distance calculation signal and is returned from the second communication device; ,
A counter that is reset every time the timer is reset, and that counts the phase difference detected by the detection unit with a clock having a predetermined frequency;
A storage unit storing information on which the calculation unit calculates a distance to the second communication device based on a count value of the counter;
The detector is
Detecting the time counted by the timer as the phase difference between the distance calculation signal when transmitted and the distance calculation signal when received;
The calculation unit includes:
Based on the count value when the counter counts the phase difference with the clock having the predetermined frequency and the information stored in the storage unit, the distance to the second communication device is calculated.
The communication management system according to any one of claims 3 to 6, wherein The first communication device and the sensor are provided in an automobile;
The determination unit determines that the distance from the second communication device calculated by the calculation unit is less than the predetermined distance, so that the second communication device is in the automobile. Discriminate,
For a switch that operates to start or stop the engine of the car,
The distance between the detection result when the movement of the object in the automobile is detected by the sensor and the second communication device calculated by the calculation unit is less than the predetermined distance. Based on the determination result when the determination unit determines that the second communication device is in the automobile by determining, the operation of the switch is permitted,
The distance between the detection result when the movement of the object in the automobile is detected by the sensor and the second communication device calculated by the calculation unit is greater than or equal to the predetermined distance. Based on the determination result when the determination unit has determined, prohibiting the operation of the switch,
The communication management system according to any one of claims 1 to 7, wherein When the distance between the first communication device and the second communication device is less than a predetermined distance that is equal to or less than a distance that enables communication between the first communication device and the second communication device, a predetermined process is performed. A communication management system capable of performing
The first communication device is
A first transmitter that transmits a distance calculation signal for calculating a distance to the second communication device;
By receiving a signal according to the distance calculation signal from the second communication apparatus, the distance calculation signal when transmitted and a signal according to the distance calculation signal when received A detection unit for detecting a phase difference;
A calculation unit that calculates a distance to the second communication device based on the phase difference detected by the detection unit;
The second communication device is
A second transmitter that transmits a signal corresponding to the distance calculation signal transmitted from the first communication device;
A first determination unit configured to determine whether a distance between the second communication device calculated by the calculation unit is less than the predetermined distance;
A sensor provided on the first communication device side for detecting a human body in a predetermined space;
A second discriminating unit that discriminates whether the human body in the predetermined space detected by the sensor is large or small with respect to a predetermined size;
The determination result when the second determination unit determines that the human body in the predetermined space detected by the sensor is larger than the predetermined size, and the calculation result calculated by the calculation unit Based on the determination result when the first determination unit determines that the distance to the second communication device is less than the predetermined distance, the predetermined processing can be performed.
A communication management system characterized by that. When the distance between the first communication device and the second communication device is less than a predetermined distance that is equal to or less than a distance that enables communication between the first communication device and the second communication device, a predetermined process is performed. It is a communication management method of a communication management system that makes it possible to perform,
The first communication device transmits a distance calculation signal for calculating a distance to the second communication device,
The second communication device transmits a signal according to the distance calculation signal transmitted from the first communication device,
The first communication device responds to the distance calculation signal when transmitted by receiving a signal corresponding to the distance calculation signal from the second communication device and the distance calculation signal when received Detecting a phase difference with the signal, and calculating a distance to the second communication device based on the phase difference;
Furthermore, it is determined whether the calculated distance to the second communication device is less than the predetermined distance,
Detecting a movement of an object in a predetermined space by a sensor provided on the first communication device side;
When it is determined that the distance between the detection result when the sensor detects the movement of the object in the predetermined space and the calculated second communication device is less than the predetermined distance. Based on the determination result, it is possible to perform the predetermined processing,
A communication management method for a communication management system. A communication management device capable of performing a predetermined process when a distance to a counterpart communication device is less than a predetermined distance equal to or less than a distance that enables communication with the counterpart communication device. ,
A transmission unit for transmitting a distance calculation signal for calculating a distance between the counterpart communication device;
By receiving the signal according to the distance calculation signal from the counterpart communication device, the distance calculation signal when transmitted and the signal according to the distance calculation signal when received A detection unit for detecting a phase difference;
Based on the phase difference detected by the detection unit, a calculation unit that calculates a distance to the counterpart communication device;
A determination unit that determines whether or not a distance between the communication unit calculated by the calculation unit is less than the predetermined distance, and detects movement of an object in a predetermined space The determination unit determines that the distance between the detection result when the movement of the object is detected by the sensor and the distance between the counterpart communication device calculated by the calculation unit is less than the predetermined distance. Based on the determination result when determined, it is possible to perform the predetermined processing,
A communication management device. Send a distance calculation signal to calculate the distance,
By receiving a signal corresponding to the returned distance calculation signal, a phase difference between the distance calculation signal when transmitted and a signal corresponding to the distance calculation signal when received is detected. And
Calculate the distance to the transmission position of the signal according to the distance calculation signal based on the phase difference,
Determining whether or not the calculated distance to the transmission position is less than a predetermined distance that is equal to or less than a distance at which a signal corresponding to the distance calculation signal can be received;
When it is determined that the distance between the detection result when the movement of the object is detected by the sensor that detects the movement of the object in the predetermined space and the calculated transmission position is less than the predetermined distance. Based on the determination result, it is possible to communicate with a counterpart communication device that can perform a predetermined process,
A transmission unit that transmits a signal according to the distance calculation signal transmitted from the counterpart communication device;
A communication device.

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