JP2006233675A - Sensor device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sensor device which can correctly identify the state of a monitoring target. <P>SOLUTION: The automobile sensor device 3 is electrically connected to a common electric passage W from which electric signals are output based on a plurality of output patterns, and detects the state of an automobile. A microcomputer of the automobile sensor device 3 acquires an electric signal output to the common electric passage W. The microcomputer is comprised of a memory for storing therein a reference output pattern determined beforehand in reference to state identifying index information serving as an index for identifying the state of the automobile, and upon matching of an output pattern of an electric signal acquired by the microcomputer per se, with the reference output pattern stored in the memory, the microcomputer identifies the state of the automobile, based on the state identifying index information stored in the memory in association with the matched reference output pattern. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a sensor device that detects a state of a monitoring target.

  Patent Document 1 discloses a monitor system (locking / unlocking state monitoring device) for monitoring the locking / unlocking state of a house window. The monitor system includes a sensor device (child device) and a monitor device (parent device). The sensor device detects a locked / unlocked state of the window. Then, the sensor device receives an ID code signal including an ID code individually set for each sensor device and a status code (locked status code or unlocked status code) indicating a locked / unlocked state of the window monitored by the sensor device. Send to the outside.

  On the other hand, when the monitor device receives the ID code signal transmitted from the sensor device, the monitor device identifies the sensor device from the ID code included in the ID code signal. The monitor device recognizes the locked / unlocked state of the window monitored by the identified sensor device from the status code also included in the ID code signal. The monitor device visually notifies whether the window is in a locked state or an unlocked state. As a result, a house resident with the monitor system installed can accurately grasp the locked / unlocked state of the window only by looking at the contents of the notification from the monitor device.

Here, the monitor device has a home mode and a warning mode. In the home mode, visual notification of the unlocked / unlocked state of the window is mainly performed, and the buzzer sounds for a short time when the window is unlocked. On the other hand, in the alert mode, the buzzer sounds for a long time when the window is unlocked.
JP 2002-115429 A

  By the way, if the principle of the monitor system (housing monitor system) for monitoring the locking / unlocking state of the house window as described above is applied, the monitor system (vehicle use monitor) for monitoring the state of the vehicle instead of the house window. It is also possible to realize a monitor system. That is, a sensor device (slave device) that detects the state of the vehicle is installed in the vehicle, while a monitor device (master device) that notifies the vehicle state detected by the sensor device is installed in the home of the owner of the vehicle. By doing so, it is possible to grasp the state of the vehicle outdoors while staying at home (indoor).

  Here, in the vehicle monitoring system, the alarm request signal is transmitted from the sensor device to the outside while the vehicle-mounted horn is sounded when the vehicle is in a state to issue an alarm, and the alarm request signal is received by the monitor device. In some cases, the buzzer of the monitor device may be sounded. For example, when it is detected by the security device that the vehicle is in a state where an alarm should be issued, the vehicle-mounted horn is sounded by outputting an excitation signal (horn sounding signal) from the security device to the horn relay. On the other hand, if the sensor device is electrically connected to the electrical path from the security device to the horn relay, it is possible to transmit an alarm request signal from the sensor device to the outside in conjunction with the ringing of the in-vehicle horn. It becomes.

  However, the in-vehicle horn is originally sounded when a vehicle occupant performs an operation for sounding the in-vehicle horn. For this reason, in addition to the case where the vehicle is in a state where an alarm should be issued, the alarm request signal is transmitted from the sensor device to the outside also when the passenger of the vehicle performs an operation for ringing the in-vehicle horn. In either case, the buzzer of the monitor device is sounded.

  As a result, for the resident of the house where the monitor device is installed, the reason that the buzzer of the monitor device is ringing is due to the vehicle being in a state where an alarm should be issued, or the vehicle occupant It cannot be specified whether the operation is performed for ringing the vehicle-mounted horn. In short, when trying to realize a vehicle monitoring system, there is a possibility that the state of the vehicle cannot be specified accurately.

  The present invention has been made paying attention to such problems, and an object of the present invention is to provide a sensor device capable of accurately specifying the state of a monitoring target.

  In order to achieve the above object, according to the first aspect of the present invention, there is provided a sensor device that is electrically connected to a common electrical path through which an electrical signal is output by each of a plurality of output patterns, and detects a state of a monitoring target. In this case, the acquisition unit that acquires the electrical signal output to the common electrical path and the state specification that serves as an index for specifying the state of the monitoring target based on the predetermined reference output pattern When the output pattern of the electrical signal acquired by the storage means and the storage means stored in association with the index information for use matches the reference output pattern stored in the storage means, the matched reference output pattern And a specifying means for specifying the state of the monitoring target based on the associated state specifying indicator information.

  According to a second aspect of the present invention, in the sensor device according to the first aspect, the storage means is configured such that each of the plurality of reference output patterns and each of the plurality of state specifying index information correspond one-to-one. The reference output pattern is stored in association with the state specifying index information.

  According to a third aspect of the present invention, in the sensor device according to the first or second aspect, the specifying unit takes into account a predetermined tolerance with respect to a reference output pattern stored in the storage unit. When the output pattern of the electric signal acquired by the acquiring unit falls within the range from the reference output pattern to the limit output pattern, the specifying unit sets the electric power acquired by the acquiring unit. It is determined that the output pattern of the signal matches the reference output pattern stored in the storage unit, and based on the state specifying index information associated with the matched reference output pattern, the state of the monitoring target To identify.

  According to a fourth aspect of the present invention, in the sensor device according to any one of the first to third aspects, a transmission means for transmitting a state signal indicating the state of the monitoring target specified by the specifying means to the outside. It is characterized by having.

The “action” of the present invention will be described below.
According to the first aspect of the present invention, when the output pattern of the electrical signal acquired by the acquisition unit matches the reference output pattern stored in the storage unit, the state associated with the matched reference output pattern Based on the specifying index information, the state of the monitoring target is specified. Therefore, it is possible to accurately specify the state of the monitoring target.

  According to the second aspect of the present invention, when the output pattern of the electrical signal acquired by the acquisition unit matches any one of the reference output patterns stored in the storage unit, it is associated with the matched reference output pattern. The status of the monitoring target is identified based on the status identifying index information. Therefore, it is possible to accurately specify each of a plurality of states that can be taken by the monitoring target.

  According to the third aspect of the present invention, when the output pattern of the electrical signal acquired by the acquisition unit is within the range from the reference output pattern to the limit output pattern, the output pattern of the electrical signal acquired by the acquisition unit is The reference output pattern stored in the storage means is determined to coincide with the reference output pattern. Then, the monitoring target state is specified based on the state specifying index information associated with the matched reference output pattern. Therefore, it is possible to reliably identify the state of the monitoring target without overlooking it.

  According to the fourth aspect of the present invention, when the state of the monitoring target is specified by the specifying unit, a state signal indicating the specified state of the monitoring target is transmitted to the outside. When the status signal is received on the receiving side, the status of the monitoring target detected by the sensor device can be specified on the receiving side. Therefore, the state of the monitoring target detected by the sensor device can be accurately specified outside (receiving side) the sensor device.

Since this invention is comprised as mentioned above, there exist the following effects.
According to invention of any one of Claims 1-4, the state of monitoring object can be pinpointed correctly.

Hereinafter, an embodiment embodying the present invention will be described.
As shown in FIG. 1, the monitor system 1 includes a residential sensor device 2, an automobile sensor device 3, and a monitor device 4. The residential sensor device 2 is for detecting the state of a house (building). The automobile sensor device 3 is for detecting the state of the automobile (vehicle). The monitor device 4 is for informing both of the state of the house detected by the home sensor device 2 and the state of the car detected by the car sensor device 3. The monitor system 1 is capable of unidirectional communication between each of the residential sensor device 2 (transmission side) and the automobile sensor device 3 (transmission side) and the monitor device 4 (reception side).

  The residential sensor device 2 of the present embodiment is for detecting the state of a residential window (monitoring target). Specifically, the residential sensor device 2 is for detecting the locking / unlocking state of the window of the house. On the other hand, the automobile sensor device 3 of the present embodiment is for detecting whether or not the automobile (monitoring target) is in a state where an alarm should be issued.

  In the monitor system 1 of this embodiment, residential sensor devices 2 </ b> A to 2 </ b> D exist as the residential sensor device 2. Residential sensor device 2A is for detecting the locking / unlocking state of window A on the first floor of the house. The residential sensor device 2B is for detecting the locking / unlocking state of the window B on the first floor of the house. The residential sensor device 2C is for detecting the locking / unlocking state of the window C on the second floor of the house. Residential sensor device 2D is for detecting the locking / unlocking state of window D on the second floor of the house.

  On the other hand, in the monitor system 1 of the present embodiment, there are vehicle sensor devices 3P to 3R as the vehicle sensor device 3. The automobile sensor device 3P is for detecting whether or not the automobile P is in a state to issue an alarm. The automobile sensor device 3Q is for detecting whether or not the automobile Q is in a state where an alarm should be issued. The automobile sensor device 3R is for detecting whether or not the automobile R is in a state to issue an alarm.

  Therefore, the monitor system 1 according to the present embodiment includes the housing sensor devices 2A to 2D (transmission side) and the vehicle sensor devices 3P to 3R (transmission side) and the monitor device 4 (reception side). Unidirectional communication is possible.

  In addition, each structure of residential sensor apparatus 2A-2D is mutually the same. Therefore, the description of the common points of the home sensor devices 2A to 2D is replaced by the description of the home sensor device 2 except for the description of the characteristic points of the home sensor devices 2A to 2D. On the other hand, the configurations of the automobile sensor devices 3P to 3R are the same as each other. Therefore, the description of the common points of the automobile sensor devices 3P to 3R is substituted for the explanation of the automotive sensor devices 3 except for the explanation of the characteristic points of the automotive sensor devices 3P to 3R.

  The residential sensor device 2 has a transmission function by wireless communication. The residential sensor device 2 includes a reed switch 21, a microcomputer 22, a transmission circuit 23, and a transmission antenna 24. The reed switch 21 is for detecting the locked / unlocked state of the window of the house. The reed switch 21 is turned on when the house window is in the locked state (locked state), and outputs a detection signal indicating that the house window is in the locked state to the microcomputer 22. On the other hand, the reed switch 21 is turned OFF when the house window is in the unlocked state (unlocked state), and outputs a detection signal indicating that the house window is in the unlocked state to the microcomputer 22.

  Incidentally, the reed switch 21 is a magnetic sensor capable of detecting a magnet built in an operated means operated to lock and unlock a window of a house. That is, the reed switch 21 is turned on when the operated means is operated and the magnet is brought close to the reed switch 21 when the window of the house is locked. On the other hand, the reed switch 21 is turned off when the operated means is operated and the magnet moves away from the reed switch 21 when the house window is unlocked.

  The microcomputer 22 is a CPU unit including a CPU, a ROM, a RAM, and the like (not shown). The microcomputer 22 includes a nonvolatile memory 22a. The memory 22a stores an ID code (ID code of the residential sensor device 2) set individually for each residential sensor device 2. Here, the housing first ID code is stored in the memory 22a of the housing sensor device 2A. In the memory 22a of the residential sensor device 2B, the second residential ID code is stored. In the memory 22a of the residential sensor device 2C, the residential third ID code is stored. The fourth ID code for houses is stored in the memory 22a of the house sensor device 2D.

  When the detection signal is input from the reed switch 21, the microcomputer 22 includes an ID code signal including the ID code of the residential sensor device 2 and the status code indicating the locked / unlocked state of the house window detected by the reed switch 21. Is output to the transmission circuit 23. That is, when the detection signal indicating that the house window is in the locked state is input from the reed switch 21, the microcomputer 22 indicates the ID code of the house sensor device 2 and that the house window is in the locked state. An ID code signal including the lock state code is output to the transmission circuit 23. On the other hand, when the detection signal indicating that the house window is in the unlocked state is input from the reed switch 21, the microcomputer 22 indicates that the ID code of the home sensor device 2 and the house window are in the unlocked state. An ID code signal including the unlocking state code indicating “” is output to the transmission circuit 23.

  The transmission circuit 23 modulates the ID code signal input from the microcomputer 22 into a radio wave having a predetermined frequency (426 MHz in this embodiment). The transmission antenna 24 is a medium for transmitting the ID code signal modulated by the transmission circuit 23 to the outside. Incidentally, the ID code signal transmitted from the residential sensor device 2A is a residential first ID code signal including a residential first ID code. The ID code signal transmitted from the home sensor device 2B is a home second ID code signal including the home second ID code. The ID code signal transmitted from the residential sensor device 2C is a residential third ID code signal including a residential third ID code. The ID code signal transmitted from the residential sensor device 2D is a residential fourth ID code signal including a residential fourth ID code.

The automotive sensor device 3 has a transmission function by wireless communication. The automotive sensor device 3 includes a microcomputer 31, a transmission circuit 32, and a transmission antenna 33.
The microcomputer 31 is a CPU unit including a CPU, ROM, RAM, and the like (not shown). The microcomputer 31 includes a nonvolatile memory 31a. The memory 31a stores an ID code (ID code of the vehicle sensor device 3) set individually for each vehicle sensor device 3. Here, the first ID code for automobiles is stored in the memory 31a of the automobile sensor device 3P. The second ID code for automobiles is stored in the memory 31a of the automobile sensor device 3Q. A third ID code for automobiles is stored in the memory 31a of the automobile sensor device 3R.

  The microcomputer 31 recognizes that the automobile is in a state to issue an alarm when an index signal serving as an index for specifying that the automobile is in a state to issue an alarm is input from the security ECU 101 described later. The microcomputer 31 includes the ID code of the automobile sensor device 3 and the state code indicating that the automobile is in a state to issue an alarm only when it recognizes that the automobile is in a state to issue an alarm. The alarm request signal is output to the transmission circuit 32.

  The transmission circuit 32 modulates the alarm request signal input from the microcomputer 31 into a radio wave having a predetermined frequency (426 MHz in the present embodiment). The transmission antenna 33 is a medium for transmitting the alarm request signal modulated by the transmission circuit 32 to the outside. Incidentally, the alarm request signal transmitted from the automobile sensor device 3P is an automobile first alarm request signal including the automobile first ID code. The alarm request signal transmitted from the automobile sensor device 3Q is an automobile second alarm request signal including the automobile second ID code. The alarm request signal transmitted from the automobile sensor device 3R is an automobile third alarm request signal including the automobile third ID code.

  The monitor device 4 has a reception function by wireless communication. The monitor device 4 includes a receiving antenna 41, a receiving circuit 42, a microcomputer 43, a display unit 44, and a buzzer 45. The receiving antenna 41 is a medium for receiving an ID code signal transmitted from the residential sensor device 2 and a medium for receiving an alarm request signal transmitted from the automobile sensor device 3. When an ID code signal (alarm request signal) is received by the reception antenna 41, the reception circuit 42 demodulates the ID code signal (alarm request signal) to generate a reception signal. Then, the reception circuit 42 outputs a reception signal to the microcomputer 43.

  The microcomputer 43 is a CPU unit including a CPU, a ROM, a RAM, and the like (not shown). The microcomputer 43 includes a nonvolatile memory 43a. The memory 43a stores the same ID code as the ID code of the home sensor device 2 (home reference ID code) and the same ID code as the ID code of the car sensor device 3 (automobile reference ID code). ing.

  The memory 43a of the present embodiment stores the same ID code (first reference ID code for house) as the ID code (first ID code for house) of the home sensor device 2A. The memory 43a stores the same ID code (second residential reference ID code) as the ID code (second residential ID code) of the residential sensor device 2B. Furthermore, the memory 43a stores the same ID code (third residential reference ID code) as the ID code (third residential ID code) of the residential sensor device 2C. The memory 43a stores the same ID code (the fourth reference ID code for houses) as the ID code (the fourth ID code for houses) of the sensor device 2D for houses.

  In addition, the memory 43a stores the same ID code (first automotive reference ID code) as the ID code (first automotive ID code) of the automotive sensor device 3P. The memory 43a stores the same ID code (second automotive reference ID code) as the ID code (second automotive ID code) of the automotive sensor device 3Q. Further, the memory 43a stores the same ID code (third reference ID code for automobile) as the ID code (third ID code for automobile) of the automobile sensor device 3R.

  In particular, as shown in FIG. 2, each of the reference ID code for a house and the reference ID code for a car (reference ID code) is stored in the memory 43 a in each of LEDs 44 a to 44 d and 44 p to 44 r of the display unit 44 described later ( LED) and is stored. Incidentally, the 1st standard ID code for houses is related with LED44a. The second reference ID code for housing is associated with the LED 44b. The third reference ID code for residence is associated with the LED 44c. The fourth reference ID code for residence is associated with the LED 44d. The first reference ID code for automobiles is associated with the LED 44p. The second reference ID code for automobiles is associated with the LED 44q. The third reference ID code for automobiles is associated with the LED 44r.

  When the reception signal is input from the reception circuit 42, the microcomputer 43 includes an ID code included in the reception signal and each reference ID code (a first reference ID code for a house to a fourth reference ID code for a house and an automobile first reference code). It is determined whether or not any one of (1 reference ID code to 3rd reference ID code for automobiles) matches. That is, in this case, the microcomputer 43 executes ID code verification.

  When both the ID codes match, the microcomputer 43 matches the matched reference ID codes (the first reference ID code for the house to the fourth reference ID code for the house and the first reference ID code for the car to the third reference ID code for the car). The light emission command signal is output to the LED (any one of LEDs 44a to 44d and 44p to 44r) associated with any one of the above.

  On the other hand, the microcomputer 43 includes the same ID code as any one of the first reference ID code for residential use to the fourth reference ID code for residential use in the received signal input from the receiving circuit 42, and the received signal includes When the unlocking state code is included, a ringing command signal is output to the buzzer 45.

  On the other hand, the microcomputer 43 rings the buzzer 45 when the received signal input from the receiving circuit 42 includes the same ID code as any of the first reference ID code for automobile to the third reference ID code for automobile. A command signal is output.

  The display unit 44 includes LEDs 44a to 44d and 44p to 44r. The display unit 44 includes a total of 30 LEDs including the LEDs 44a to 44d and 44p to 44r. Hereinafter, for convenience of explanation, each of these 30 LEDs may be represented by an LED 44x. Each of the LEDs 44x emits light when a light emission command signal is input from the microcomputer 43. Each of the LEDs 44x is a two-color LED. That is, each of the LEDs 44x emits green light, and also emits red light.

The buzzer 45 rings when a ringing command signal is input from the microcomputer 43.
Incidentally, the monitor device 4 has a home mode and a warning mode. Hereinafter, the alerting | reporting aspect of the state (the locking / unlocking state of a house window and the state of a motor vehicle) of the monitoring object by the monitor apparatus 4 is demonstrated for every mode.

  As shown in FIG. 3, in the display unit 44, the positions corresponding to the LEDs 44 a to 44 d and 44 p to 44 r are each marked with a monitoring target. Incidentally, the notation “first floor window A” is given at the position corresponding to the LED 44a. The position corresponding to the LED 44b is labeled “first floor window B”. The position corresponding to the LED 44c is labeled “second floor window C”. At the position corresponding to the LED 44d, the notation "second floor window D" is given. At the position corresponding to the LED 44p, the notation "Automobile P" is given. In the position corresponding to the LED 44q, the notation "automobile Q" is given. At the position corresponding to the LED 44r, the notation "automobile R" is given.

  When the house window A is locked in the home mode, the LED 44a is lit in green. Similarly, when the house window B (C, D) is locked in the home mode, the LED 44b (44c, 44d) is lit in green. Similarly, the LED 44p (44q, 44r) is lit in green when the automobile P (Q, R) is not in a state to issue an alarm in the home mode.

  On the other hand, when the house window A is unlocked in the home mode, the LED 44a is lit red. Similarly, when the house window B (C, D) is in the unlocked state in the home mode, the LED 44b (44c, 44d) is lit red. In particular, when at least one of the windows A to D of the house is switched from the locked state to the unlocked state in the home mode, the buzzer 45 is sounded for a short time.

  Here, when the automobile P (Q, R) is in a state to issue an alarm in the home mode, the LED 44p (44q, 44r) flashes red. In particular, when at least one of the automobiles P to R in the home mode is switched from a state in which no alarm is to be issued to a state in which an alarm is to be issued, the buzzer 45 is sounded for a long time (= alarm operation).

  On the other hand, when the window A of the house is locked in the alert mode, the LED 44a is lit in green. Similarly, when the window B (C, D) of the house is locked in the alert mode, the LED 44b (44c, 44d) is lit in green. Similarly, the LED 44p (44q, 44r) is lit in green when the automobile P (Q, R) is not in a state to issue an alarm in the alert mode.

  On the other hand, when the house window A is unlocked in the alert mode, the LED 44a blinks red. Similarly, when the window B (C, D) of the house is in the unlocked state in the alert mode, the LED 44b (44c, 44d) blinks red. In particular, when at least one of the windows A to D of the house is switched from the locked state to the unlocked state in the alert mode, the buzzer 45 is sounded for a long time (= alarm operation).

  Here, when the automobile P (Q, R) is in a state to issue an alarm in the alert mode, the LED 44p (44q, 44r) blinks red. In particular, when at least one of the automobiles P to R is not in a state to issue a warning in the warning mode, the buzzer 45 is sounded for a long time (= alarm operation).

  In short, regardless of whether the monitor device 4 is set to the home mode or the alert mode, the monitor device 4 is switched from a state where at least one of the automobiles P to R is not in a state where an alarm should be issued to a state where an alarm should be issued. An alarm is issued by the buzzer 45.

  Note that the mode transition switch 46 (see FIG. 1) is used when the monitor device 4 is shifted from the home mode to the warning mode, or when the monitor device 4 is shifted from the warning mode to the home mode.

  By the way, in order to notify the monitoring target state (locking / unlocking state of the house window and the state of the car) in the home mode or the alert mode as described above, each of the home sensor device 2 and the car sensor device 3 is previously provided. Must be registered in the monitor device 4. However, the registration procedure is not a main part of the present invention, so that the description is omitted.

Next, characteristic points of the monitor system 1 will be described.
Now, the monitor system 1 (particularly the automobile sensor device 3) of this embodiment is linked to the electronic key system 5 shown in FIG. The electronic key system 5 includes a portable device 6 and a locking / unlocking control device 7. The portable device 6 is owned by the owner of the car. The locking / unlocking control device 7 is provided on the automobile side. The electronic key system 5 can perform two-way communication between the portable device 6 and the locking / unlocking control device 7. The electronic key system 5 permits the unlocking (unlocking) of the vehicle-mounted door by the locking / unlocking control device 7 when the corresponding portable device 6 is used. In addition, the electronic key system 5 permits the locking / unlocking of the vehicle-mounted door by the locking / unlocking control device 7 when the corresponding portable device 6 is used.

  In the present embodiment, electronic key systems 5P to 5R exist as the electronic key system 5. The electronic key system 5P is an electronic key system applied to the automobile P. The electronic key system 5P includes a portable device 6P and a locking / unlocking control device 7P. On the other hand, the electronic key system 5Q is an electronic key system applied to the automobile Q. The electronic key system 5Q includes a portable device 6Q and a locking / unlocking control device 7Q. On the other hand, the electronic key system 5R is an electronic key system applied to the automobile R. The electronic key system 5R includes a portable device 6R and a locking / unlocking control device 7R.

  The configurations of the electronic key systems 5P to 5R (portable devices 6P to 6R, locking / unlocking control devices 7P to 7R) are the same as each other. Accordingly, the electronic key systems 5P to 5R (portable devices 6P to 6R, locking / unlocking control) are excluded except for the description of the features of the electronic key systems 5P to 5R (portable devices 6P to 6R, locking / unlocking control devices 7P to 7R). The description of the common points of the devices 7P to 7R) is substituted for the description of the electronic key system 5 (portable device 6, locking / unlocking control device 7).

  The portable device 6 has a reception function by wireless communication and a transmission function by wireless communication. The portable device 6 includes a reception antenna 61, a reception circuit 62, a microcomputer 63, a transmission circuit 64, a transmission antenna 65, an unlocking switch 66, and a locking switch 67. The receiving antenna 61 is a medium for receiving a request signal transmitted from the locking / unlocking control device 7. When the request signal is received by the reception antenna 61, the reception circuit 62 demodulates the request signal and generates a reception signal. Then, the reception circuit 62 outputs a reception signal to the microcomputer 63.

  The microcomputer 63 is a CPU unit including a CPU, a ROM, a RAM, and the like (not shown). The microcomputer 63 includes a nonvolatile memory 63a. In the memory 63a, an ID code (ID code of the portable device 6) set individually for each portable device 6 is stored. Here, the first ID code for portable devices is stored in the memory 63a of the portable device 6P. The second ID code for portable devices is stored in the memory 63a of the portable device 6Q. The third ID code for portable device is stored in the memory 63a of the portable device 6R.

  When the reception signal is input from the reception circuit 62, the microcomputer 63 generates a signal (ID code signal) including the ID code of the portable device 6 in order to respond to the request signal. Then, the microcomputer 63 outputs an ID code signal to the transmission circuit 64. The transmission circuit 64 modulates the ID code signal input from the microcomputer 63 into a radio wave having a predetermined frequency (300 MHz in this embodiment). The transmission antenna 65 is a medium for transmitting the ID code signal modulated by the transmission circuit 64.

  Incidentally, the ID code signal transmitted from the portable device 6P is the first ID code signal for portable devices including the first ID code for portable devices. On the other hand, the ID code signal transmitted from the portable device 6Q is a portable device second ID code signal including the portable device second ID code. On the other hand, the ID code signal transmitted from the portable device 6R is the third ID code signal for portable devices including the third ID code for portable devices.

  The unlocking switch 66 is operated when the vehicle-mounted door is unlocked by remote control from a point away from the automobile. The unlocking switch 66 is a push switch having a button that can be pressed from the outside of the portable device 6. When the button is pressed, the unlocking switch 66 outputs a detection signal indicating that an operation for unlocking the vehicle-mounted door has been performed to the microcomputer 63.

  When the detection signal is input from the unlocking switch 66, the microcomputer 63 requests an operation code (unlocking to request unlocking of the in-vehicle door in order to request the unlocking control device 7 to unlock the in-vehicle door. A signal (an unlock request ID code signal) including the lock request operation code) and the ID code of the portable device 6 is generated. Then, the microcomputer 63 outputs the unlock request ID code signal to the transmission circuit 64.

  The transmission circuit 64 modulates the unlock request ID code signal input from the microcomputer 63 into a radio wave having a predetermined frequency (300 MHz in this embodiment). The transmission antenna 65 also functions as a medium for transmitting the unlock request ID code signal modulated by the transmission circuit 64.

  The lock switch 67 is operated when the vehicle-mounted door is locked by remote control from a point away from the automobile. The locking switch 67 is a push switch that includes a button that can be pressed from the outside of the portable device 6. When the button is pressed, the lock switch 67 outputs a detection signal indicating that an operation for locking the vehicle-mounted door has been performed to the microcomputer 63.

  When the detection signal is input from the lock switch 67, the microcomputer 63 requests an operation code (lock request operation for requesting the lock of the vehicle door to request the lock control device 7 to lock the vehicle door). Code) and an ID code of the portable device 6 (locking request ID code signal) are generated. Then, the microcomputer 63 outputs the lock request ID code signal to the transmission circuit 64.

  The transmission circuit 64 modulates the lock request ID code signal input from the microcomputer 63 into a radio wave having a predetermined frequency (300 MHz in the present embodiment). The transmission antenna 65 also functions as a medium for transmitting the lock request ID code signal modulated by the transmission circuit 64.

  The locking / unlocking control device 7 has a transmission function by wireless communication and a reception function by wireless communication. The locking / unlocking control device 7 includes a transmission circuit 71, a transmission antenna 72, a reception antenna 73, a reception circuit 74, and a verification electronic control unit (hereinafter referred to as verification ECU) 75. The transmission circuit 71 modulates the request signal input from the verification ECU 75 into a radio wave having a predetermined frequency (134 KHz in this embodiment). The transmission antenna 72 is a medium for transmitting the request signal modulated by the transmission circuit 71.

  Here, the request signal is transmitted within a predetermined area A72 outside the vehicle. As a result, bidirectional communication between the portable device 6 and the locking / unlocking control device 7 can be performed within the predetermined area A72. That is, the request signal is a trigger signal for establishing bidirectional communication between the portable device 6 and the locking / unlocking control device 7.

  The receiving antenna 73 is a medium for receiving the ID code signal transmitted from the portable device 6 in response to the request signal. When an ID code signal is received by the receiving antenna 73, the receiving circuit 74 demodulates the ID code signal to generate a received signal. Then, the reception circuit 74 outputs a reception signal to the verification ECU 75.

  The verification ECU 75 is a CPU unit including a CPU, a ROM, a RAM, and the like (not shown). The verification ECU 75 includes a non-volatile memory 75a. In the memory 75a, the same ID code (reference ID code for portable device) as the ID code of the corresponding portable device 6 is stored. The memory 75a of the present embodiment stores the same ID code (first reference ID code for portable device) as the ID code (first ID code for portable device) of the portable device 6P. The memory 75a stores the same ID code (second reference ID code for portable device) as the ID code (second ID code for portable device) of the portable device 6Q. Further, the memory 75a stores the same ID code (third reference ID code for portable device) as the ID code (third ID code for portable device) of the portable device 6R.

  Here, the collation ECU 75 monitors the transmission circuit 71 in a state where the vehicle-mounted door is locked in order to monitor the approach to the automobile (entrance to the predetermined area A72 outside the vehicle) accompanying the ride by the holder of the corresponding portable device 6. Outputs a request signal. In addition, the collation ECU 75 transmits when the door lock switch 92 described later is operated to monitor the exit of the vehicle (entrance to the predetermined area A72 outside the vehicle) when the owner of the corresponding portable device 6 gets off the vehicle. A request signal is output to the circuit 71. That is, in these cases, the verification ECU 75 executes vehicle exterior communication control.

  When the reception signal is input from the reception circuit 74 based on the vehicle communication control, the verification ECU 75 and the ID code included in the reception signal and the reference ID code for each portable device (first reference ID for the portable device). It is determined whether or not any one of the code to the third reference ID code for portable device) matches. That is, in this case, the verification ECU 75 performs ID code verification.

  A door electronic control unit (hereinafter referred to as a door ECU) 90 is electrically connected to the verification ECU 75 via an in-vehicle communication network 80. And collation ECU75 recognizes that the corresponding portable machine 6 was utilized, when both ID codes correspond by ID code collation. When the verification ECU 75 recognizes that the corresponding portable device 6 has been used, the verification ECU 75 outputs an ID code match signal to the in-vehicle communication network 80. As a result, when the door ECU 90 acquires the ID code match signal, the door ECU 90 locks and unlocks the vehicle-mounted door. In short, the verification ECU 75 permits the locking / unlocking of the vehicle-mounted door by outputting an ID code match signal to the in-vehicle communication network 80.

  The door ECU 90 unlocks the in-vehicle door and also locks the in-vehicle door. A touch sensor 91 and a door locking switch 92 are electrically connected to the door ECU 90.

  The touch sensor 91 is provided on the door outside handle. The door outside handle is operated when the vehicle-mounted door is opened from the outside of the vehicle. The touch sensor 91 is for detecting that the door outside handle is being touched. When the door outside handle is being touched, the touch sensor 91 outputs a detection signal indicating that the door outside handle is being touched to the door ECU 90 over a period during which the door outside handle is being touched.

  When the detection signal is input from the touch sensor 91, the door ECU 90 recognizes that the door outside handle is being touched. When the door ECU 90 recognizes that the door outside handle is touched in a state where the ID code matching signal output from the verification ECU 75 to the in-vehicle communication network 80 is acquired, the door ECU 90 unlocks the vehicle-mounted door. .

  The door locking switch 92 is provided on the door outside handle. The door locking switch 92 is operated when the vehicle-mounted door is locked from the outside of the vehicle. The door locking switch 92 is for detecting that an operation for locking the vehicle-mounted door from the outside of the vehicle is performed. The door locking switch 92 is a push switch having a button that can be pressed from the outside. When the button is pressed, the door locking switch 92 outputs a detection signal indicating that the button is pressed to the door ECU 90 over the period during which the button is pressed.

  When the detection signal is input from the door locking switch 92, the door ECU 90 recognizes that an operation for locking the vehicle-mounted door from the outside of the vehicle is being performed. When the door ECU 90 recognizes that an operation for locking the vehicle-mounted door from the outside of the vehicle is being performed in a state where the ID code matching signal output from the verification ECU 75 to the in-vehicle communication network 80 is acquired, Lock the vehicle door.

  As described above, the electronic key system 5 of the present embodiment automatically locks and unlocks the vehicle-mounted door by the locking / unlocking control device 7 when the holder of the corresponding portable device 6 (electronic key) enters the predetermined area A72. To allow.

  By the way, when the unlocking switch 66 of the corresponding portable device 6 is operated, the unlocking request ID code signal is transmitted from the portable device 6 by wireless communication. When the unlocking request ID code signal is received by the receiving antenna 73, a receiving signal (including the unlocking request operation code and the ID code of the portable device 6) is input from the receiving circuit 74 to the verification ECU 75. .

  When the received signal input from the receiving circuit 74 includes an ID code that matches the reference ID code for the portable device, the verification ECU 75 recognizes that the corresponding portable device 6 has been used. When the verification ECU 75 recognizes that the corresponding portable device 6 has been used, the verification ECU 75 outputs an ID code match signal to the in-vehicle communication network 80. In addition, when the unlocking request operation code is included in the received signal, the verification ECU 75 recognizes that an operation for unlocking the in-vehicle door has been performed using the corresponding portable device 6. . Then, the verification ECU 75 outputs an unlock command signal to the in-vehicle communication network 80 when recognizing that an operation for unlocking the in-vehicle door is performed using the corresponding portable device 6. As a result, when the door ECU 90 acquires the ID code match signal and the unlock command signal, the door ECU 90 unlocks the vehicle-mounted door.

As described above, the electronic key system 5 according to the present embodiment permits the unlocking control device 7 to unlock the vehicle-mounted door when the unlocking switch 66 of the corresponding portable device 6 is operated.
On the other hand, when the lock switch 67 of the corresponding portable device 6 is operated, the lock request ID code signal is transmitted from the portable device 6 by wireless communication. When the lock requesting ID code signal is received by the receiving antenna 73, the received signal (including the lock requesting operation code and the portable device 6 ID code) is input from the receiving circuit 74 to the verification ECU 75.

  When the received signal input from the receiving circuit 74 includes an ID code that matches the reference ID code for the portable device, the verification ECU 75 recognizes that the corresponding portable device 6 has been used. When the verification ECU 75 recognizes that the corresponding portable device 6 has been used, the verification ECU 75 outputs an ID code match signal to the in-vehicle communication network 80. In addition, when the received signal includes a lock request operation code, the verification ECU 75 recognizes that an operation for locking the in-vehicle door has been performed using the corresponding portable device 6. Then, the verification ECU 75 outputs a locking command signal to the in-vehicle communication network 80 when recognizing that an operation for locking the vehicle-mounted door is performed using the corresponding portable device 6. As a result, the door ECU 90 locks the vehicle-mounted door when acquiring the ID code match signal and the lock command signal.

Thus, the electronic key system 5 of this embodiment permits the locking of the vehicle-mounted door by the locking / unlocking control device 7 when the locking switch 67 of the corresponding portable device 6 is operated.
By the way, in an automobile to which such an electronic key system 5 is applied, the case where the in-vehicle door is opened after the corresponding portable device 6 is used and the corresponding portable device 6 is not used. It is possible to distinguish from the case where the vehicle-mounted door is opened. When the vehicle-mounted door is opened after the corresponding portable device 6 is used, it can be considered that the vehicle is not in a state where an alarm should be issued. On the other hand, when the vehicle-mounted door is opened without using the corresponding portable device 6, it can be considered that the vehicle is in a state where an alarm should be issued.

  Therefore, the automobile to which the electronic key system 5 of the present embodiment is applied includes a security device 100 (see FIG. 4) linked to the electronic key system 5. In the present embodiment, security devices 100P to 100R exist as the security device 100. The security device 100P is a security device applied to the automobile P. The security device 100Q is a security device applied to the automobile Q. The security device 100R is a security device applied to the automobile R. The security devices 100P to 100R have the same configuration. Therefore, the description of the common points of the security devices 100P to 100R is substituted for the description of the security device 100, except for the description of the characteristic points of the security devices 100P to 100R.

  The security device 100 includes a security electronic control unit (hereinafter referred to as a security ECU) 101 and a horn relay 102. The security ECU 101 is a CPU unit including a CPU, a ROM, a RAM, and the like (not shown). Security ECU 101 is electrically connected to each of collation ECU 75 and door ECU 90 via in-vehicle communication network 80. Therefore, the security ECU 101 can acquire various signals (the ID code coincidence signal, a door opening signal described later) output from the verification ECU 75 and the door ECU 90 to the in-vehicle communication network 80.

  Here, a door courtesy switch 93 is electrically connected to the door ECU 90. The door courtesy switch 93 is for detecting the open / closed state of the in-vehicle door. When the vehicle door is open, the door courtesy switch 93 outputs a detection signal indicating that the vehicle door is open to the door ECU 90 over the period when the vehicle door is open. Further, the door courtesy switch 93 outputs a detection signal indicating that the vehicle-mounted door is closed to the door ECU 90 during the period when the vehicle-mounted door is closed when the vehicle-mounted door is closed.

  When the detection signal indicating that the in-vehicle door is open is input from the door courtesy switch 93 while the detection signal indicating that the in-vehicle door is closed is input from the door courtesy switch 93, the door ECU 90 is in-vehicle. Recognize that the door has been opened. When the door ECU 90 recognizes that the in-vehicle door has been opened, the door ECU 90 outputs a door open signal indicating that the in-vehicle door has been opened to the in-vehicle communication network 80.

  When the security ECU 101 acquires the door opening signal output from the door ECU 90 to the in-vehicle communication network 80 in a state where the ID code match signal output from the verification ECU 75 to the in-vehicle communication network 80 is acquired, the corresponding portable device 6 is used and recognizes that the in-vehicle door has been opened. In this case, it can be said that the vehicle is not in a state to issue a warning. Therefore, in this case, the security ECU 101 does not output an excitation signal to the horn relay 102. Further, in this case, the security ECU 101 does not output an index signal serving as an index for specifying that the automobile is in a state where an alarm should be issued to the microcomputer 31 of the automobile sensor device 3.

  On the other hand, when the security ECU 101 has acquired the door opening signal output from the door ECU 90 to the in-vehicle communication network 80 in a state where the ID code matching signal has not been acquired, the corresponding portable device 6 is not used and the vehicle-mounted door is not used. Recognize that has been opened. In this case, it can be said that the automobile is in a state to issue a warning. Therefore, in this case, the security ECU 101 outputs an excitation signal to the horn relay 102. Further, in this case, the security ECU 101 outputs an index signal serving as an index for specifying that the automobile is in a state to issue an alarm to the microcomputer 31 of the automobile sensor device 3 shown in FIG.

  When an excitation signal is input from the security ECU 101, the horn relay 102 sounds a vehicle-mounted horn (not shown) by exciting a coil. As a result, the fact that the automobile is in a state to issue an alarm is notified over the periphery of the automobile (= alarm operation by the automobile).

  The microcomputer 31 of the automotive sensor device 3 is configured so that the ID code of the automotive sensor device 3 is used only when an index signal serving as an index for specifying that the vehicle is in a state where an alarm should be issued is input from the security ECU 101. Then, an alarm request signal including a status code indicating that the automobile is in a state to issue an alarm is output to the transmission circuit 32. As a result, when the alarm request signal is transmitted from the transmission antenna 33 and the alarm request signal is received by the reception antenna 41 of the monitor device 4, an alarm is issued from the buzzer 45. As a result, it is notified over the periphery of the monitor device 4 that the vehicle is in a state to issue an alarm (= alarm operation by the monitor device 4).

Next, the maximum feature point of the monitor system 1 will be described.
Now, the in-vehicle horn used for the “alarming operation by the automobile” as described above is originally sounded when an occupant of the automobile performs an operation for ringing the in-vehicle horn. That is, in this embodiment, the vehicle-mounted horn that is sounded when the vehicle occupant performs an operation for sounding the vehicle-mounted horn is also used as a device that is sounded when the vehicle is in a state where an alarm should be issued. ing.

  Here, the operation when the passenger of the vehicle performs an operation for ringing the in-vehicle horn will be described. The “operation for ringing the vehicle-mounted horn” performed by the passenger of the automobile is realized by operating the horn switch 103 shown in FIG. That is, when the horn switch 103 is operated by a passenger of the automobile, an excitation signal (= first excitation signal) is output from the horn switch 103 to the horn relay 102. And when a 1st excitation signal is input into the horn relay 102, the vehicle-mounted horn is sounded because the coil of the horn relay 102 is excited. Incidentally, the output pattern of the first excitation signal depends on the operation pattern of the horn switch 103 by the vehicle occupant.

  On the other hand, the operation when the automobile is in a state to issue an alarm will be described. In summary, when the automobile is in a state where an alarm should be issued, an excitation signal (= second excitation signal) is output from the security ECU 101 to the horn relay 102. When the second excitation signal is input to the horn relay 102, the in-vehicle horn is sounded by exciting the coil of the horn relay 102. Incidentally, the output pattern of the second excitation signal does not depend on the operation pattern of the horn switch 103 by the vehicle occupant, unlike the output pattern of the first excitation signal.

  More specifically, the output pattern of the second excitation signal is predetermined. The output pattern of the second excitation signal in this embodiment is shown in FIG. The second excitation signal is obtained by periodically repeating an L level period and an H level period. In particular, the L level period and the H level period are set to the same value (T1 in this embodiment). For convenience of explanation, in the second excitation signal, the first L level period is the first period K1, the H level period following the first period K1 is the second period K2, and the L level period following the second period K2 is the first period K1. The H level period following the third period K3 and the third period K3 is expressed as a fourth period K4.

  Incidentally, during the L level period (the first period K1 and the third period K3), the in-vehicle horn is sounded by exciting the coil of the horn relay 102. On the other hand, during the H level period (the second period K2 or the fourth period K4), the in-vehicle horn is not ringed because the coil of the horn relay 102 is demagnetized.

  Here, as shown in FIG. 5, the automotive sensor device 3 is electrically connected to the electrical path from the horn switch 103 to the horn relay 102 and to the electrical path from the security ECU 101 to the horn relay 102. ing. That is, the automotive sensor device 3 is electrically connected to the common electrical path W through which the first excitation signal and the second excitation signal are output.

  In the memory 31a of the microcomputer 31 in the automobile sensor device 3, the reference output pattern is stored in association with the state specifying index information (see FIG. 7). The state specifying index information is an index for specifying the state of the automobile. In the present embodiment, the first reference output pattern is associated with the first state specifying index information. The output pattern of the second excitation signal is stored as the first reference output pattern. On the other hand, as first state specifying index information, information serving as an index for specifying that the vehicle is in a state to issue a warning is stored.

Next, the vehicle state specifying control by the microcomputer 31 of the vehicle sensor device 3 will be described with reference to the flowchart shown in FIG.
When the horn switch 103 is operated by a passenger of the automobile, an excitation signal (= first excitation signal) is output from the horn switch 103 to the horn relay 102. On the other hand, when the automobile is in a state where an alarm should be issued, an excitation signal (= second excitation signal) is output from the security ECU 101 to the horn relay 102. In short, in these cases, an electrical signal (a first excitation signal or a second excitation signal) is output to the common electrical path W. Then, the electrical signal is input to the microcomputer 31. As a result, the microcomputer 31 acquires the electrical signal (step S1).

  When the microcomputer 31 acquires the electrical signal in step S1, the limit value (= 5%) in consideration of the tolerance (± 5%) with respect to the value (= T1) of the first period K1 in the output pattern of the second excitation signal (= T1 ± 5%) is set. In step S2, the microcomputer 31 determines whether or not the value of the first L-level period X1 in the electrical signal acquired in step S1 is within the range of T1 ± 5%. When the value of the first L level period X1 in the electrical signal acquired in step S1 falls within the range of T1 ± 5% (YES in step S2), the microcomputer 31 proceeds to step S3. On the other hand, when the value of the first L-level period X1 in the electrical signal acquired in step S1 is outside the range of T1 ± 5% (NO in step S2), the microcomputer 31 ends this process.

  Next, the microcomputer 31 sets a limit value (= T1 ± 5%) in consideration of the tolerance (± 5%) for the value (= T1) of the second period K2 in the output pattern of the second excitation signal. In step S3, the microcomputer 31 determines whether or not the value of the H-level period X2 following the period X1 falls within the range of T1 ± 5%. When the value of the H level period X2 following the period X1 falls within the range of T1 ± 5% (YES in step S3), the microcomputer 31 proceeds to step S4. On the other hand, when the value of the H-level period X2 following the period X1 is outside the range of T1 ± 5% (NO in step S3), the microcomputer 31 ends this process.

  Next, the microcomputer 31 sets a limit value (= T1 ± 5%) in consideration of the tolerance (± 5%) for the value (= T1) of the third period K3 in the output pattern of the second excitation signal. In step S4, the microcomputer 31 determines whether or not the value of the L level period X3 following the period X2 is within the range of T1 ± 5%. When the value of the L level period X3 following the period X2 falls within the range of T1 ± 5% (YES in step S4), the microcomputer 31 proceeds to step S5. On the other hand, when the value of the period X3 at the L level following the period X2 is outside the range of T1 ± 5% (NO in step S4), the microcomputer 31 ends this process.

  Next, the microcomputer 31 sets a limit value (= T1 ± 5%) in consideration of the tolerance (± 5%) for the value (= T1) of the fourth period K4 in the output pattern of the second excitation signal. In step S5, the microcomputer 31 determines whether or not the value of the H level period X4 following the period X3 falls within the range of T1 ± 5%. When the value of the H level period X4 following the period X3 falls within the range of T1 ± 5% (YES in step S5), the microcomputer 31 proceeds to step S6. On the other hand, when the value of the H level period X4 following the period X3 is outside the range of T1 ± 5% (NO in step S5), the microcomputer 31 ends this process.

  In step S6, the microcomputer 31 determines that the output pattern of the electrical signal acquired in step S1 matches the output pattern of the second excitation signal (first reference output pattern stored in the memory 31a). Then, in step S7, the microcomputer 31 specifies that the automobile is in a state in which an alarm should be issued based on the first state specifying index information associated with the first reference output pattern. Then, the microcomputer 31 outputs an alarm request signal to the transmission circuit 32 in step S8. Thereby, an alarm request signal (corresponding to a state signal indicating the state of the automobile) is transmitted from the transmission antenna 33 to the outside. When the alarm request signal is received by the monitor device 4, an alarm is issued by the buzzer 45 of the monitor device 4.

  As described above, the microcomputer 31 sets a limit output pattern in consideration of a predetermined tolerance with respect to the first reference output pattern stored in the memory 31a. When the output pattern of the electrical signal acquired by the microcomputer 31 falls within the range from the first reference output pattern to the limit output pattern, the output pattern of the electrical signal acquired by the microcomputer 31 is stored in the memory 31a. It is determined that the first reference output pattern matches. Then, the microcomputer 31 specifies the state of the automobile based on the first state specifying index information associated with the matched first reference output pattern.

As described above, according to the present embodiment, the following operations and effects can be obtained.
(1) When the output pattern of the electrical signal acquired by the microcomputer 31 matches the first reference output pattern stored in the memory 31a, the first state identification associated with the matched first reference output pattern The state of the automobile is specified based on the index information for use. Therefore, the state of the automobile can be specified accurately.

  (2) When the output pattern of the electrical signal acquired by the microcomputer 31 is within the range from the first reference output pattern to the limit output pattern, the output pattern of the electrical signal acquired by the microcomputer 31 is stored in the memory 31a. It is determined that the first reference output pattern matches. Then, the state of the vehicle is specified based on the first state specifying index information associated with the matched first reference output pattern. Accordingly, it is possible to reliably identify the state of the automobile without overlooking it.

  (3) When the state of the vehicle (that the vehicle is in a state to issue an alarm) is specified by the microcomputer 31, a state signal (alarm request signal) indicating the state of the specified vehicle is transmitted to the outside. And when a status signal is received by the receiving side (monitor apparatus 4), it is possible to identify the state of the automobile detected by the automobile sensor apparatus 3 on the receiving side. Therefore, the state of the automobile detected by the automobile sensor device 3 can be accurately specified outside (receiving side) the automobile sensor device 3.

  (4) A total of four determination processes as to whether or not the output pattern of the electrical signal acquired by the microcomputer 31 falls within the range from the first reference output pattern to the limit output pattern (each of steps S2 to S5 = (Multiple times). Therefore, it is possible to accurately specify the state of the automobile without error.

  (5) A second excitation signal in which an L level period and an H level period are periodically repeated is used. For this reason, the process of determining whether the output pattern of the electrical signal acquired by the microcomputer 31 belongs to the range from the first reference output pattern to the limit output pattern is performed after the output of the second excitation signal is started. It is not necessary to execute the entire period until the output of the second excitation signal is completed. Therefore, after the output of the second excitation signal is started, the state of the automobile can be accurately specified in a short time.

  (6) There is an advantage that the buzzer 45 of the monitor device 4 is not sounded only by the sounding of the vehicle-mounted horn when the vehicle occupant performs the operation for sounding the vehicle-mounted horn.

  (7) Unlike the present embodiment, the effect similar to the above (6) can be obtained even when a diode is electrically connected to the common electrical path W as shown by a broken line in FIG. However, in the present embodiment, the effect (6) can be obtained with a simple configuration in which the diode is omitted.

  (8) When the vehicle is in a state where an alarm should be issued, only a single second excitation signal is output from the security ECU 101 to the horn relay 102 (common electric path W). It is not output to the path W. That is, it is not necessary to change the configuration of the security device 100 at all. Therefore, the automobile sensor device 3 can be immediately linked to the existing security device 100, which is convenient.

In addition, the said embodiment can also be changed and actualized as follows.
The tolerance for the reference output pattern stored in the memory 31a is not limited to ± 5%. That is, the tolerance can be set arbitrarily. Then, the smaller the tolerance is set, the lower the possibility that an alarm is issued by the buzzer 45 of the monitor device 4 even though the automobile is not in a state to issue an alarm. On the other hand, the larger the tolerance is set, the more reliably the vehicle can be identified without overlooking that it is in a state to issue an alarm.

  -The frequency | count of the judgment process whether the output pattern of the electric signal acquired by the microcomputer 31 belongs to the range from a 1st reference | standard output pattern to a limit output pattern is not limited to four times. That is, the number of determination processes can be set arbitrarily. Then, as the number of determination processes is set to be smaller, it is possible to accurately specify that the automobile is in a state in which an alarm should be issued in a short time. On the other hand, the higher the number of determination processes, the lower the possibility that an alarm is issued by the buzzer 45 of the monitor device 4 even though the vehicle is not in a state to issue an alarm.

In the embodiment, both the process in step S3 and the process in step S5 may be omitted.
In the embodiment, both the process in step S2 and the process in step S4 may be omitted.

  When the difference between the value of the period X1 of the L level and the value of the period X3 in the electrical signal acquired by the microcomputer 31 is less than the first predetermined value, the output pattern of the electrical signal acquired by the microcomputer 31 is the second A configuration may be adopted in which it is determined that the output pattern of the excitation signal matches.

  When the difference between the value of the H level period X2 and the value of the period X4 in the electrical signal acquired by the microcomputer 31 is less than the second predetermined value, the output pattern of the electrical signal acquired by the microcomputer 31 is the second A configuration may be adopted in which it is determined that the output pattern of the excitation signal matches.

  ・ Acquired by the microcomputer 31 when YES in each of the steps S2 to S5 and the difference between the value of the period X1 of the L level and the value of the period X3 in the electrical signal obtained by the microcomputer 31 is less than the first predetermined value. A configuration may be adopted in which it is determined that the output pattern of the generated electrical signal matches the output pattern of the second excitation signal.

  When YES in each of step S2 to step S5, and when the difference between the value of the H level period X2 and the value of the period X4 in the electrical signal acquired by the microcomputer 31 is less than the second predetermined value, A configuration may be adopted in which it is determined that the output pattern of the electrical signal acquired by the microcomputer 31 matches the output pattern of the second excitation signal.

  The difference between the value of the period X1 at the L level and the value of the period X3 in the electrical signal acquired by the microcomputer 31 is less than the first predetermined value, and the difference between the value of the period X2 at the H level and the value of the period X4 is the first A configuration may be adopted in which when the output value of the electrical signal acquired by the microcomputer 31 matches with the output pattern of the second excitation signal when it is less than 2 predetermined values.

  -YES in each of steps S2 to S5, and the difference between the value of the period X1 at the L level and the value of the period X3 is less than the first predetermined value, and the difference between the value of the period X2 at the H level and the value of the period X4 When is less than the second predetermined value, a configuration may be adopted in which it is determined that the output pattern of the electrical signal acquired by the microcomputer 31 matches the output pattern of the second excitation signal.

  The memory 31a may store the reference output pattern in association with the state specifying index information so that each of the plurality of reference output patterns and each of the plurality of state specifying index information have a one-to-one correspondence. . For example, the first reference output pattern is associated with the first state specifying index information, while the second reference output pattern is associated with the second state specifying index information. If comprised in this way, when the output pattern of the electrical signal acquired by the microcomputer 31 matches with any of the reference output patterns stored in the memory 31a, the state associated with the matched reference output pattern The state of the automobile is specified based on the specifying index information. Therefore, it is possible to accurately specify each of a plurality of states that the automobile can take.

The block diagram which shows the structure of a monitor system. The conceptual diagram which shows the memory content of the memory of a monitor apparatus. Schematic which shows the display part of a monitor apparatus. The block diagram which shows the structure of an electronic key system and a security device. FIG. 3 is an electric circuit diagram around a common electric path. The wave form diagram which shows the output pattern of a 2nd excitation signal. The conceptual diagram which shows the memory content of the memory of the sensor apparatus for motor vehicles. The flowchart for demonstrating the vehicle state specific control by the microcomputer of the sensor apparatus for motor vehicles.

Explanation of symbols

  3 (3P-3R) ... automotive sensor device (sensor device), 31 ... microcomputer (acquisition means, identification means), 31a ... memory (storage means), 32 ... transmission circuit (transmission means), 33 ... transmission antenna (transmission) Means), P to R ... automobile (monitoring target), W ... common electric path.

Claims (4)

A sensor device that is electrically connected to a common electrical path through which an electrical signal is output by each of a plurality of output patterns and detects a state of a monitoring target,
Obtaining means for obtaining an electrical signal output to the common electrical path;
Storage means for storing a predetermined reference output pattern in association with state specifying index information that is an index for specifying what state the monitoring target is in;
When the output pattern of the electrical signal acquired by the acquisition unit matches the reference output pattern stored in the storage unit, based on the state specifying index information associated with the matched reference output pattern, A sensor device comprising: a specifying unit that specifies a state of a monitoring target. The sensor device according to claim 1,
The storage means stores the reference output pattern in association with the state specifying indicator information so that each of the plurality of reference output patterns and each of the plurality of state specifying indicator information correspond one-to-one. A sensor device. The sensor device according to claim 1 or 2,
The specifying means sets a limit output pattern considering a predetermined tolerance with respect to a reference output pattern stored in the storage means,
When the output pattern of the electrical signal acquired by the acquiring unit falls within a range from a reference output pattern to a limit output pattern, the specifying unit stores the output pattern of the electrical signal acquired by the acquiring unit as the memory. A sensor device which determines that the reference output pattern stored in the means matches, and specifies the state of the monitoring target based on the state specifying index information associated with the matched reference output pattern. In the sensor device according to any one of claims 1 to 3,
A sensor device comprising: a transmission unit that transmits a state signal indicating a state of a monitoring target specified by the specifying unit to the outside.

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