JP2004130942A - On-vehicle security device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an on-vehicle security device corresponding to a situation that there is a cut wiring between an information means for a threat warning and a main body. <P>SOLUTION: This on-vehicle security device consists of a sensor unit 1, an information unit 2, and a PDC terminal 3. The sensor unit 1 and the information unit 2 are connected by a serial transmission line A1 and a power supply line A2. The information unit 2 and the PDC terminal 3 are connected by a data line B. The sensor unit 1 makes the threat warning if invasion of a thief into a vehicle is detected and it is determined as abnormal, and transmits an abnormality content to the information unit 2 by means of serial transmission through a serial interface 120 and the serial transmission line A1. The information unit 2 informs the abnormality content to a predetermined communication terminal from the PDC terminal 3 though an interface 213. When the power supply line A2 is cut, warning operation of the sensor unit 1 is continued by a backup battery 122. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an in-vehicle security device.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in an in-vehicle security device, a sensor unit detects intrusion of a person into a vehicle, and when it is determined that an abnormal state is detected by a main body, a predetermined means is transmitted from a PDC (Personal Digital Cellular System) terminal via a PDC interface by a reporting unit. There is a communication terminal that reports an abnormal content to a communication terminal, and a communication terminal that issues a warning by light or sound using a notification unit. (For example, refer to Patent Document 1.)
[0003]
[Patent Document 1]
JP-A-7-170346 (FIG. 1)
[0004]
[Problems to be solved by the invention]
The informing means of the in-vehicle security device is to be installed in an invisible place to issue a warning, but the main body is to be installed in an invisible place. Signals are exchanged. However, if the pirate cuts off the wiring, there is a problem that the alarming operation of the notification means installed in a prominent place does not work.
[0005]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an in-vehicle security device that can cope with a situation in which a wire between a notification unit that performs a threat alarm and a main body is disconnected.
[0006]
[Means for Solving the Problems]
According to the first aspect of the present invention, there is provided a sensor unit that issues a threat alarm when detecting an intrusion of a person into a vehicle and determines that the vehicle is in an abnormal state, a PDC terminal that communicates with an external communication terminal, and a sensor unit. Connected by a communication line and a power line, receive the contents of the abnormality from the sensor unit via the communication line, report the contents of the abnormality from the PDC terminal to a predetermined communication terminal, and supply the power to the sensor unit via the power line A sensor unit for detecting intrusion of a person into the vehicle, a notifying unit for giving a warning when a detection result of the sensor unit indicates an abnormal state, and a communication line. Serial communication means for outputting the details of the error through serial transmission via the power supply, a backup power supply, and when the power supply line is disconnected, switch off the power supply from the backup power supply. When the power line is disconnected, the backup power supply continuously performs the detection operation of the sensor unit, the alarm operation of the alarm unit, and the output operation of the abnormal content of the serial communication unit. , A PDC interface for transmitting and receiving signals to and from a PDC terminal, serial communication means for receiving the details of an error from the sensor unit by serial transmission via a communication line, and a communication terminal from the PDC terminal to a predetermined communication terminal via the PDC interface. It is characterized by comprising a reporting means for reporting the contents of the abnormality, and a power supply unit for supplying power to the unit and supplying power to the sensor unit via a power line.
[0007]
The invention according to claim 2 includes a sensor unit for performing a warning alarm when detecting an intrusion of a person into the vehicle and determining that the vehicle is in an abnormal state, a PDC terminal for communicating with an external communication terminal, and a sensor unit. Connected by a communication line and a power line, receive the contents of the abnormality from the sensor unit via the communication line, report the contents of the abnormality from the PDC terminal to a predetermined communication terminal, and supply the power to the sensor unit via the power line A sensor unit for detecting intrusion of a person into the vehicle, a notifying unit for giving a warning when a detection result of the sensor unit indicates an abnormal state, and a communication line. Serial communication means for outputting the contents of the abnormality by serial transmission via the PDC terminal, wherein the reporting unit exchanges signals with the PDC terminal A serial communication means for receiving the contents of the abnormality from the sensor unit by serial transmission via a communication line, a reporting means for reporting the contents of the abnormality from the PDC terminal to a predetermined communication terminal via the PDC interface, and a power supply to the unit. And a power supply unit for supplying power to the sensor unit via a power supply line. At least one of the sensor unit and the notification unit communicates according to a state of serial transmission performed between the respective serial communication units. It is characterized by comprising a disconnection detecting means for detecting a disconnection of the line.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0009]
The in-vehicle security device according to the present embodiment is installed in a vehicle, and includes a sensor unit 1, a reporting unit 2, and a PDC terminal 3, as shown in FIG. Are connected by a single cable A0, which forms a serial transmission line A1 and a power supply line A2.
The reporting unit 2 and the PDC terminal 3 are connected by a data line B (serial data line, logic signal line). Then, the sensor unit 1 is installed in a location that is visible from outside the vehicle, and the notification unit 2 and the PDC terminal 3 are installed in locations that are hardly visible from outside the vehicle.
[0010]
The sensor unit 1 detects an intrusion of a pirate into the vehicle and issues an alarm when it is determined that the vehicle is in an abnormal state. The central processing unit 11, a human sensor 112, a human sensor block 113, The sound pressure sensor microphone 114, the sound pressure sensor block 115, the remote control reception block 116, the LED block 117, the amplification block 118, the buzzer 119, the serial interface 120, the power supply switching block 121, and the backup battery 122 Prepare.
[0011]
The central processing unit 11 controls the operation of this unit, and has a ROM 110 in which processing procedures for in-vehicle security are stored, and a RAM 111 as storage means. Further, it receives commands and responses from the reporting unit 2 via the serial interface 120 and transmits commands and responses to the reporting unit 2.
[0012]
The human sensor 112 detects the presence or absence of a person in the vehicle. The detection signal is converted into a signal suitable for the central processing unit 11 by the human sensor block 113 and then input to the central processing unit 11.
[0013]
The sound pressure sensor microphone 114 detects the opening and closing of a vehicle door and glass breakage by a thief by detecting the vibration of the air. The detection signal is converted into a signal suitable for the central processing unit 11 by the sound pressure sensor block 115. After that, it is input to the central processing unit 11.
[0014]
When the user operates the remote control switch outside the vehicle, a set signal or a reset signal is input to the central processing unit 11 from the remote control reception block 116 that has received the remote control signal. . The central processing unit 11 sets set / reset of the alert operation of the present device according to the set signal and the reset signal, and according to the processing procedure stored in the ROM 110, when the present device is in the alert state, the human sensor 112; It is determined from each detection signal of the sound pressure sensor microphone 114 whether or not the state is abnormal. If it is determined that the state is abnormal, the contents of the abnormality are stored in the RAM 111 and a warning is issued. In this threat alarm, a threat and a warning are given by a light that emits light from the LED of the LED block 117, and a threat and a warning are given by a sound that sounds the buzzer 119 by the amplification block 118. Then, while performing these threat alarm operations, the abnormality content stored in the RAM 111 is transmitted to the notification unit 2 by serial transmission via the serial interface 120 and the serial transmission line A1.
[0015]
When the apparatus is not in the alert state, the central processing unit 11 does not perform the detection operation, the threat alarm operation, and the abnormal content transmission operation.
[0016]
The reporting unit 2, when obtaining the content of the abnormality from the sensor unit 1 via the serial transmission line A 1, reports the content of the abnormality from the PDC terminal 3 to a predetermined communication terminal. The central processing unit 21, the serial interface 212 , A PDC interface 213, a cigar socket power supply block 214, and a secondary battery 215.
[0017]
The central processing unit 21 controls the operation of this unit, and has a ROM 210 in which processing procedures for in-vehicle security are stored, and a RAM 211 as storage means. Further, it receives commands and responses from the sensor unit 1 via the serial interface 212 and transmits commands and responses to the sensor unit 1.
[0018]
The PDC interface 213 is provided between the central processing unit 21 and the PDC terminal 3. Based on an instruction from the central processing unit 21, the PDC interface 213 reads the state of the PDC terminal 3 via the data line B, Or the operation of the PDC terminal 3 is performed.
[0019]
When the content of the abnormality is transmitted from the sensor unit 1 via the serial interface 212 according to the processing procedure stored in the ROM 210, the central processing unit 21 stores the content of the abnormality in the RAM 211 and transmits a signal to the PDC interface 213. Then, it instructs the PDC terminal 3 to make a call to a telephone number registered in advance. When the PDC terminal 3 performs a calling operation to a predetermined communication terminal to establish a line, the central processing unit 21 transmits the contents of the abnormality stored in the RAM 211 from the PDC terminal 3 via the PDC interface 213 to the predetermined communication terminal. Report to.
[0020]
Next, a communication format of serial transmission performed between the serial interfaces 120 and 212 of the sensor unit 1 and the notification unit 2 is shown in FIG. A low-level start bit (ST) indicating the start of data, followed by 8-bit data (D0 to D7) and a parity bit (P), and a high-level stop bit (STP) indicating the end of the data after the parity bit Is transmitted and received to perform data communication, and has a specification of baud rate: 600 bps and parity: EVEN.
[0021]
Normally, when normal serial transmission is performed, the signal on the serial transmission line A1 may not be at a low level for a maximum period of 16.667 msec or more, regardless of the type of 8-bit data to be transmitted. Absent. However, in the present embodiment, when the serial transmission line A1 is disconnected, the signal is set to a low level. Therefore, in each of the central processing units 11 and 21 of the sensor unit 1 and the reporting unit 2, each serial interface 120, It monitors whether the level of the data received at 212 is a high level or a low level. If the level is low for a certain period or more, it is determined that the serial transmission line A1 is disconnected. For example, in the sensor unit 1, the central processing unit 11 performs a disconnection notification operation such as blinking the LED block 117. Alternatively, the reporting unit 2 may report the disconnection notification message stored in the ROM 210 by the central processing unit 21 from the PDC terminal 3 to a predetermined communication terminal via the PDC interface 213.
[0022]
If the power supply of this device is connected between the cigar socket (accessory power supply) 4 installed in the vehicle and the cigar socket power supply block 214 of the notification unit 2, the cigar socket power supply block 214 The power supply input is converted into a power supply suitable for the apparatus, and the power is supplied to the notification unit 2, and the power is further supplied to the sensor unit 1 via the power supply line A <b> 2.
[0023]
The secondary battery 215 is charged when power is input from the cigarette socket 4 and supplies power to the apparatus when there is no power input from the cigarette socket 4.
[0024]
Normally, power supply from the cigar socket 4 is possible during driving of the vehicle, but if the driving key is removed, the power supply from the cigar socket 4 is stopped. When the power is supplied from the socket 4, it is determined that the user is in the vehicle. When the apparatus is in the alert state, the alert operation is reset. When the apparatus is not in the alert state, the alert operation is disabled. I have. Then, when the user removes the key and leaves the vehicle, the power supply from the cigar socket 4 is stopped, so that a warning operation can be set. That is, the alert operation of the present apparatus can be performed only when power is supplied from the secondary battery 215.
[0025]
Further, the sensor unit 1 includes the backup battery 122 in case the power supply line A2 is disconnected and the power supply to the sensor unit 1 is stopped. The power supplied from the notification unit 2 via the power line A2 and the power supplied from the backup battery 122 are connected to the power switching block 121 in the sensor unit 1, and the power switching block 121 Is switched to either the power supplied from the notification unit 2 or the backup battery 122. This switching operation will be described below.
[0026]
The central processing unit 11 of the sensor unit 1 outputs a backup permission signal to the power supply switching block 121 when the apparatus is in the alert state. In this state, when the power supply line A2 is disconnected and the power supply from the notification unit 2 to the sensor unit 1 is stopped, the power supply switching block 121 switches the operation power supply of the sensor unit 1 to the backup battery 122, and the alarm operation of the present apparatus. (Detection operation, threat alarm operation, abnormal content transmission operation) can be continuously performed. Further, even when not only the power supply line A2 but also the serial transmission line A1 is disconnected, the detection operation and the threat alarm operation can be continuously performed by the sensor unit 1 alone.
[0027]
【The invention's effect】
According to the first aspect of the present invention, there is provided a sensor unit that issues a threat alarm when detecting an intrusion of a person into a vehicle and determines that the vehicle is in an abnormal state, a PDC terminal that communicates with an external communication terminal, and a sensor unit. Connected by a communication line and a power line, receive the contents of the abnormality from the sensor unit via the communication line, report the contents of the abnormality from the PDC terminal to a predetermined communication terminal, and supply the power to the sensor unit via the power line A sensor unit for detecting intrusion of a person into the vehicle, a notifying unit for giving a warning when a detection result of the sensor unit indicates an abnormal state, and a communication line. Serial communication means for outputting the details of the error via serial transmission via a power supply, a backup power supply, and switching to power supply from the backup power supply when the power supply line is disconnected. When the power line is disconnected, the backup power supply continuously performs the detection operation of the sensor unit, the threat alarm operation of the notification unit, and the abnormal content output operation of the serial communication unit. , A PDC interface for transmitting and receiving signals to and from a PDC terminal, serial communication means for receiving the details of an abnormality from the sensor unit by serial transmission via a communication line, and Since it is equipped with a reporting unit that reports the contents of the abnormality and a power supply unit that supplies power to this unit and also supplies power to the sensor unit via the power line, the alert state can be continued even when the power line is disconnected. Even if the wiring between both units including the communication line and the communication line is cut by a pirate, Sensing operation, can be continuously performed threatening alarm operation, there is an effect that user convenience is improved. In addition, compared to a configuration in which information transmission between the sensor unit and the reporting unit is performed by parallel transmission, the wiring between both units can be made thinner, installation simplicity is improved, aesthetic appearance is excellent, wiring is reduced, and costs are reduced. This is advantageous in terms of aspect.
[0028]
The invention according to claim 2 includes a sensor unit for performing a warning alarm when detecting an intrusion of a person into the vehicle and determining that the vehicle is in an abnormal state, a PDC terminal for communicating with an external communication terminal, and a sensor unit. Connected by a communication line and a power line, receive the contents of the abnormality from the sensor unit via the communication line, report the contents of the abnormality from the PDC terminal to a predetermined communication terminal, and supply the power to the sensor unit via the power line A sensor unit for detecting intrusion of a person into the vehicle, a notifying unit for giving a warning when a detection result of the sensor unit indicates an abnormal state, and a communication line. Serial communication means for outputting the contents of the abnormality by serial transmission via the PDC terminal, wherein the reporting unit exchanges signals with the PDC terminal A serial communication means for receiving the contents of the abnormality from the sensor unit by serial transmission via a communication line, a reporting means for reporting the contents of the abnormality from the PDC terminal to a predetermined communication terminal via the PDC interface, and a power supply to the unit. And a power supply unit for supplying power to the sensor unit via a power supply line. At least one of the sensor unit and the notification unit communicates according to a state of serial transmission performed between the respective serial communication units. Since the disconnection detecting means for detecting the disconnection of the line is provided, there is an effect that the disconnection of the communication line can be detected and, for example, the disconnection notification can be performed. Further, the number of components of the disconnection detecting means can be reduced as compared with other disconnection detecting means such as detecting disconnection by monitoring current consumption, which is advantageous in cost. Furthermore, compared to a configuration in which information transmission between the sensor unit and the notification unit is performed by parallel transmission, the wiring between both units can be made thinner, installation simplicity is improved, aesthetic appearance is excellent, wiring is reduced, and costs are reduced. This is advantageous in terms of aspect.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing an embodiment of an in-vehicle security device of the present invention.
FIG. 2 is a diagram showing a communication format of serial transmission according to the first embodiment;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sensor unit 2 Notification unit 3 PDC terminal 11 and 21 Central processing unit 112 Human sensor 114 Sound pressure sensor microphone 117 LED block 119 Buzzer 120 and 212 Serial interface 213 PDC interface

Claims (2)

A sensor unit that issues a threat alarm when an intrusion of a person into the vehicle is detected and is judged to be abnormal, a PDC terminal that communicates with an external communication terminal, and a communication line and a power line connected to the sensor unit A notification unit that receives the content of the abnormality from the sensor unit via the communication line, reports the content of the abnormality from the PDC terminal to the predetermined communication terminal, and supplies power to the sensor unit via the power line,
The sensor unit detects the intrusion of a person into the vehicle, detects alarms based on the result of the detection by the sensor, and issues a warning when a warning is issued. A serial communication means for outputting the contents, a backup power supply, and a power supply switching means for switching to a power supply from the backup power supply when the power supply line is disconnected. When the power supply line is disconnected, the backup power supply detects the sensor means. The operation, the threat alarm operation of the notification means, and the abnormal content output operation of the serial communication means are continuously performed,
The reporting unit includes a PDC interface for transmitting / receiving a signal to / from the PDC terminal, serial communication means for receiving the content of an abnormality from the sensor unit by serial transmission via a communication line, and a predetermined communication from the PDC terminal via the PDC interface. An in-vehicle security device comprising: a reporting unit that reports a content of an abnormality to a communication terminal; and a power supply unit that supplies power to the unit and supplies power to the sensor unit via a power line. A sensor unit that issues a threat alarm when an intrusion of a person into the vehicle is detected and is judged to be abnormal, a PDC terminal that communicates with an external communication terminal, and a communication line and a power line connected to the sensor unit A notification unit that receives the content of the abnormality from the sensor unit via the communication line, reports the content of the abnormality from the PDC terminal to the predetermined communication terminal, and supplies power to the sensor unit via the power line,
The sensor unit detects the intrusion of a person into the vehicle, detects alarms based on the result of the detection by the sensor, and issues a warning when a warning is issued. Serial communication means for outputting the contents,
The reporting unit includes a PDC interface for transmitting / receiving a signal to / from the PDC terminal, serial communication means for receiving the content of an abnormality from the sensor unit by serial transmission via a communication line, and a predetermined communication from the PDC terminal via the PDC interface. Notifying means for notifying the communication terminal of the content of the abnormality, and a power supply unit for supplying power to the unit and supplying power to the sensor unit via a power line,
At least one of the sensor unit and the reporting unit includes a disconnection detecting unit that detects a disconnection of a communication line based on a state of serial transmission performed between the serial communication units.

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