JP2005133488A - Vehicle security control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle security control device which carries out automatic control of locking/unlocking of a vehicle locking device upon reception of a signal from a receiver 1, based on a measured intensity value of the received signal, wherein the vehicle security control device is inhibited from carrying out automatic operation when the measured intensity value is temporarily set to an automatic control permitting value due to existence of an unstable element such as an obstacle. <P>SOLUTION: According to the operation of the vehicle security control device, a plurality of measured intensity values are averaged, and if the average value is set to a locking/unlocking permitting value, the control device makes temporary primary determination. Then if the temporary primary determination is consecutively made twice, the control device makes secondary determination by regarding the consecutive primary determination as authentic operational determination, and therefor the control device carries out automatic control of locking/unlocking, based on the secondary determination. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention belongs to the technical field of a control device for a security system such as a vehicular lock that automatically controls locking / unlocking of a vehicle door.

Today, a vehicle is provided with a security system like a locking device that locks and unlocks a door, and in such a security system, a radio wave transmitted from a transmitter (portable device) is controlled. A wireless system using aerial transmission waves such as is widely used. As one such example, this will be described by taking a lock device as an example. A transmission wave output from a transmitter is received by a receiver provided in a vehicle, and the output intensity (level) of the received transmission wave is If it is greater than the preset output strength (set strength), it is determined that the driver (owner) carrying the transmitter has approached the vehicle and automatically unlocks, while If it is small, there is a control that automatically determines that the driver has moved away and automatically locks. And in such an automatic control device for a vehicle lock, for example, when there is some instability factor (for example, an obstacle) that inhibits transmission of a transmission wave between the driver and the vehicle, and the strength of the received signal becomes weak, For this reason, automatic unlocking may not be performed immediately even if the driver enters the unlocking area, and as a result of instability factors, the strength of the received signal goes back and forth the threshold for locking and unlocking. In this case, the locking and unlocking operations are repeatedly performed, which is a problem.
Therefore, there is an attempt to solve the above-described problem by changing the threshold for determining the strength of the received signal depending on the reception status (see Patent Document 1).
JP 2003-27790 A

  However, in the above-mentioned conventional one, the threshold value is changed depending on the reception status, so that it takes time to recognize the reception status, and the sensitivity when operating the security system is inevitably dull. In addition, there is a problem of being sensitive when the intensity of the received signal temporarily increases, and here is a problem to be solved by the present invention.

The present invention has been created in view of the above-described circumstances in order to solve these problems, and the invention of claim 1 includes a transmitter for transmitting a preset information signal, and the transmission. And a receiver for receiving a signal and outputting a control command to the security operation means based on information included in the received signal. Signal intensity measuring means for measuring the measured intensity values, means for storing the measured intensity values while sequentially updating the measured intensity values to new ones, and calculated values calculated from the stored measured intensity values And a command output means for outputting the corresponding control command when it is determined that the security operation is to be performed. It is a security control device for a vehicle according to claim.
According to a second aspect of the present invention, in the first aspect, when the determination means is a security operation equivalent value that is set in advance, a primary determination that this is a temporary security operation determination; When the primary determination continues for a preset number of times, it is configured to make a secondary determination that this is a true security operation determination, and the command output means performs the secondary determination Accordingly, the vehicle security control device is configured to output a corresponding control command.
A third aspect of the present invention is the vehicle security control device according to the first or second aspect, wherein the calculated value is an average value of the stored measured intensity values.
A fourth aspect of the present invention is the vehicle security control device according to the first or second aspect, wherein the calculated value is a total value of the stored measured intensity values.
A fifth aspect of the present invention is the vehicle security control device according to the first, second, third, or fourth aspect, wherein the security operation is a locking or unlocking operation of a vehicle lock.

According to the invention of claim 1, since it is determined whether or not the security operation is performed based on the calculated value calculated from the plurality of stored measured values, the intensity measurement value of the received signal is temporarily stored. Stable security operation can be performed without causing unstable operation when the security operation value is reached.
With the invention according to claim 2, the determination means makes a temporary determination by the primary determination, and the temporary determination is performed a plurality of times to make a true determination, and the security operation is performed. Therefore, a more reliable and stable security operation is performed.
According to the invention of claim 3 and claim 4 of the invention, the calculation value can be calculated and set easily.
According to the invention of claim 5, the automatic locking and unlocking of the vehicle lock can be stably performed, and the reliability is improved.

  Next, embodiments of the present invention will be described with reference to the drawings. In the figure, reference numeral 1 denotes a transmitter (portable device). The transmitter 1 digitally codes a preset ID code (a code for recognizing itself (code) and various codes such as an instruction code for a door lock). The transmitter 1 includes a code generation unit 2, a transmission unit 3, a control unit 4, and an antenna 5, and the ID code information generated from the code generation unit 2 is transmitted by the control unit 4. The transmission unit 3 that is controlled is converted into a digital signal and transmitted from the antenna 5. Of course, the transmission wave may be modulated into an analog signal and transmitted.

  On the other hand, reference numeral 6 denotes a receiver (master unit), which includes an antenna 7 that receives a signal transmitted from the transmitter 1 and a signal strength measuring unit (signal that measures the strength of the received signal). Intensity measuring means) 8, the measured received signal intensity A from the latest to the oldest n (plurality: first to third in this embodiment) A1, A2, A3... A measurement intensity value storage unit (measurement intensity value storage means) 9 that stores (registers) An while updating An to a new one in sequence, and an average value B (B of the stored signal intensities A1, A2, A3... An = Average value calculation unit (calculation means) 10 for calculating (calculating) = (A + A2 + A3 +... + An) / n), average value for determining whether to lock or unlock based on the calculated average value B A determination unit (determination unit) 11 locks and opens the door lock based on the determination result. A lock command output unit (command output unit) 12 that outputs a command to determine whether or not to perform the lock control unit 13 that receives the command from the lock command output unit 12 is connected to the actuator 15 for operating the lock 14. On the other hand, an operation command is output so as to execute a locking operation and an unlocking operation.

  Here, when the average value B is less than the preset locking threshold value X (B <X) (corresponding to the “security operation equivalent value” of the present invention), the average value determination unit 11 performs a temporary locking determination. If the preset unlocking threshold Y is exceeded (Y <B) (corresponding to the “security operation equivalent value” of the present invention), a primary determination for making a temporary unlock determination, and the primary determination When the same result of the above is consecutive for a predetermined number of times (M times, twice in the present embodiment), a secondary determination for determining the corresponding true locking or unlocking is executed. When the secondary determination is made, a corresponding control command is output to the lock command output unit 12.

  Next, the automatic control of the lock will be described in more detail with specific numerical examples. As shown in FIG. 3, the measured intensity of the signal received by the antenna 7 at the signal intensity measuring unit 8 is 125 (mV (millivolt): unit is omitted), 125, 130, 140, 145. , 140, 150, 160, 160, 135, 155, 160, 155, 160..., The intensity is sequentially measured by the signal intensity measuring unit 8, and the measured intensity is stored as a measured intensity value. The part 9 stores the latest three items. This storage is sequentially rewritten and updated. The average value of the three stored intensity values is calculated by the average value calculation unit 10. The average value calculated by the average value determination unit 11 is determined by the average value determination unit 11. When the average value is less than 145, the average value determination unit 11 makes a provisional locking determination and exceeds 155. If it is determined that the same primary determination of the temporary unlocking determination or unlocking determination continues twice, the true unlocking determination or unlocking determination is performed. It is set to make a secondary determination.

  That is, the average value calculated by the average value calculation unit 10 (in this embodiment, the fractional part is rounded down) is expressed as “... 145, 140, 150, 140, 140,. .. 160, 160, 145,... 155, 160, 155,. These average values B transition as "... 145, 143, 145, 143, 143, ... 151, 156, 155, ... 155, 156, 156, ...". The average value is determined by the average value determination unit 11. In the primary determination, "...-, locking,-, locking, locking, ...-, unlocking,-, ...-" , Unlocked, unlocked, etc. "and a temporary determination is made, and the primary determination (provisional determination) of the same" locking "or" unlocking "is saved and is true if this is repeated twice Secondary determination of locking determination or unlocking determination is made, and based on the determination result, a lock / unlock command for the door lock is output from the lock command output unit 12, and the corresponding lock control is performed. .

  In the embodiment of the present invention configured as described above, when a driver carrying the transmitter 1 approaches the vehicle, a signal including code information transmitted from the transmitter 1 is received by the receiver 6. The lock device is automatically unlocked and locked based on the received signal. In this case, the determination of the locking operation and the unlocking operation of the unlocking operation is always saved while rewriting to a new measured strength value. In addition, since the average value (calculated value) of multiple stored strength values is used, even if the strength value temporarily activates the lock for some reason, the lock operation is not performed and the stable automatic lock Operation is performed.

  In addition, in this case, even if the calculated average value becomes the set lock operation value in the determination of the lock operation, this is a temporary lock operation determination, and this temporary lock operation determination is performed a plurality of times. Since the lock operation is controlled as a true lock operation determination, a more stable and reliable automatic lock operation can be executed.

  Of course, the present invention is not limited to the above-described embodiment, and the calculated value is not an average value of the stored measurement intensity values, but an appropriate calculation such as a sum value, an integrated value, etc., if necessary. Can be a value. In addition, the measured intensity value to be stored may be every square wave with an appropriate interval such as every other or every other square wave of the received digital signal.

  Further, according to the present invention, the determination by the determination means may be performed by determining the operation of the security system with the primary determination as a true determination, and in this case, the measured intensity value of the rectangular wave with the interval is stored. Is more effective.

It is a block circuit diagram of a transmitter. It is a block circuit diagram on the receiver side. It is a chart for demonstrating the determination control state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Transmitter 6 Receiver 7 Antenna 8 Signal strength measurement part 9 Measurement intensity value storage part 10 Average value calculation part 11 Average value determination part 12 Lock command output part

Claims (5)

  A vehicle comprising: a transmitter that transmits a preset information signal; and a receiver that receives the transmission signal and outputs a control command to security operating means based on information contained in the received signal In the security control apparatus, the signal strength measuring means for measuring the strength of the received signal in the receiver, and the measured intensity value storing means for storing the measured plurality of measured intensity values while sequentially updating to a new one, A determination means for determining whether or not to perform a security operation based on a calculated value calculated from the plurality of stored measurement intensity values, and outputs a corresponding control command when it is determined to perform a security operation. A vehicle security control device comprising a command output means.   In the first aspect, the determination means is configured such that when the calculated value is a preset value corresponding to the security operation, a primary determination that this is a temporary security operation determination and the primary determination are set in advance. And a secondary determination that this is a true security operation determination, and the command output means controls the control command corresponding to the secondary determination. It is comprised so that it may output, The security control apparatus of the vehicle characterized by the above-mentioned.   3. The vehicle security control device according to claim 1, wherein the calculated value is an average value of the stored measured intensity values.   3. The vehicle security control device according to claim 1, wherein the calculated value is a total value of the stored measured intensity values.   5. The vehicle security control device according to claim 1, wherein the security operation is a locking or unlocking operation of a vehicle lock.

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