JPH06146679A - Remote control device and remote control - Google Patents

Abstract

PURPOSE:To prohibit use even in the case when a transmission code is pirated by a third person in simple constitution. CONSTITUTION:In a transmitter 1, a counter 5 to count up for each pressing of a transmission switch 4. A counted value of the counter 5 and an ID code of a specific ID memory part 2 are transmitted from a transmission part 6 as transmission codes. A receiver 10 compares the counted value of a specific counter in the receiver 10 and the transmitted counted value of the counter with each other, and when the counted value in the receiver is equal to or smaller than the latter transmitted counted value of the counter, it is judged that it matches the IC code. When the IC code matches, a counter 14 is incremented and simultaneously, a matching signal is output.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote control device for performing various remote controls such as opening and closing a vehicle door and opening and closing a garage.

[0002]

2. Description of the Related Art Conventionally, a keyless entry device for opening and closing a door of a vehicle by using a transmitter instead of a key has been put into practical use. In such a keyless entry device, when the driver operates the transmitter from outside the vehicle, a predetermined code signal is transmitted from the transmitter and received by the receiver of the vehicle body. When this code signal matches a predetermined code, the vehicle door is opened and closed.

However, according to the remote control device used in such a conventional keyless entry device, the code transmitted from the transmitter is always the same signal. There is a possibility that such a code signal may be known to a third party due to some reason such as loss of the transmitter. If the code signal is once stolen by a third party, the third party can always open and close the door with the transmitter, and there is a risk that the third party may be stolen. In order to solve such a problem, a device has been proposed in which a plurality of ID codes are provided in the memory of the transmitter and the ID codes are switched when the key is attached to prevent the theft of a third party ( Japanese Patent Application No. 1-103172).

[0004]

However, in such a conventional remote control device, since it is necessary to store a plurality of ID codes in the memory of the transmitter, not only the memory capacity becomes large, but also the ID codes are stored. At the same time, there is a drawback that the structure for switching is complicated.

The present invention has been made in view of such conventional problems, and it is a technical object to prevent the code signal from being stolen with an extremely simple structure.

[0006]

According to the invention of claim 1 of the present application, a transmitter for transmitting a code signal and a receiver for discriminating a code signal from the transmitter and outputting a control signal when they coincide with each other are provided. In the remote control device, the transmitter includes a transmission switch, an ID code storage unit that stores a unique ID code, a first counter that counts up each time the transmission switch is turned on, and the transmission switch is pressed. A transmission code conversion unit that converts the count value of the counter and the ID code stored in the ID code storage unit as a transmission code signal each time the transmission is performed; and a transmission unit that transmits the transmission code converted by the transmission code conversion unit, The receiver has a receiver, which receives a signal from the transmitter and demodulates a transmission code, and an ID code which stores the same ID code as the transmitter. The counter, the second counter, and the second counter in the receiver by comparing the count value received each time a signal is received from the transmitter with the second counter in the receiver. Comparison unit that determines whether or not the count value of is equal to or smaller than the received count value, and the ID code received when the determination output from the comparison unit matches the ID code of the ID code storage unit in the receiver And an ID code discriminating section that outputs a control signal when the two coincide with each other and counts up the second counter.

The invention of claim 2 of the present application is a remote control method in which a code signal is transmitted from a transmitter and the signal is received by a receiver, wherein a counter in the transmitter is counted every time the transmission switch of the transmitter is pressed. Every time the transmitter is pressed, the unique ID code and the count value of the first counter in the transmitter are transmitted as a transmission code, the transmission code transmitted in the receiver is received, and the received counter is received. Of the second counter in the receiver is compared with the count value of the second counter in the receiver to determine that the count value of the second counter in the receiver is equal to or smaller than the received count value, and a determination output is obtained. It is characterized in that the coincidence between the ID code storage unit in the receiver and the transmitted ID code is sometimes discriminated, and a control signal is output and the second counter in the receiver is up-counted when coincident. It is.

[0008]

According to the present invention having such a feature, when the correct transmitter is used, the counter in the transmitter counts the number of transmissions for each transmission, and the count value of the counter and the ID code are received. Sent to the container. The receiver compares the received count value with the count value of the counter in the receiver, determines that the transmitter is correct based on the comparison result, and further changes the count value of the counter by 1 when the ID codes match. I am trying. In this way, if the transmission code is stolen by a third party as it is, its use is prohibited.

[0009]

1 is a block diagram of a transmitter and a receiver according to an embodiment of the present invention. In these figures transmitter 1
Is provided with an ID code storage unit 2 including a ROM for storing a unique ID code, and the output thereof is given to the transmission code conversion unit 3. The transmitter 1 also includes a transmission switch 4 and a first counter 5 that is incremented each time the transmission switch 4 is pressed. The output of the counter 5 is given to the transmission code conversion unit 3. Transmission code converter 3
Is to add the count value of the counter 5 on the transmitter side (hereinafter referred to as CT) and the ID code of the ID code storage unit 2 to convert it into a transmission code and transmit it to the transmission unit 6. The transmitter 6 sends a signal to a receiver on the vehicle side by, for example, infrared rays or radio waves. A battery 7 is provided in the transmitter 1. The battery 7 supplies power to each part of the transmitter 1.

The receiver 10 has a receiving section 11 for receiving the signal from the transmitter 1, and its output is given to a count number comparing section 12. The count number comparison unit 12 separates the received ID code and the count value (CT) of the counter,
This count value CT and the count value CR obtained from the second counter 14 in the receiver 10 are compared, and the ID code is given to the ID code discriminating unit 13. The ID code discrimination unit 13 has a unique I stored in the ID code storage unit 15 when the ID code is sent from the count number comparison unit 12.
It is to determine whether the code matches the D code. If the ID codes match, a control signal indicating the match is output to the outside, and the output locks or unlocks the vehicle door, for example. The coincidence signal is also given to the counter 14 at the same time, and the counter 14 counts up. In addition, a reset unit 1 for resetting the count value of the counter 14
6 is provided in the receiver 10.

Next, the operation of this embodiment will be described with reference to the flow chart of FIG. In FIG. 2, the transmitter 1 starts its operation every time the transmission switch 4 is turned on. Then, in step 21, the count value C of the counter 5 in the transmitter 1
T is counted up, and its output is transmitted to the transmission code conversion unit 3. In addition to this count value, the transmission code conversion unit 3 reads the ID code from the ID code storage unit 2,
In step 23, a transmission code is created. Then, the transmission code is sent to the receiver 10 side by giving this code to the transmission unit 6. Here, the transmission code is a continuous series of the count value of the counter and the ID code. In this way, the count value CT of the counter 5 is incremented each time the transmission switch 4 is pressed, and different transmission codes are sequentially output.

FIG. 3 is a flow chart showing the operation of the receiver 10. In the figure, the receiving unit 11 receives a signal and demodulates it.
And the code are given to the count number comparison unit 12. The count number comparison unit 12 compares the transmitted count value CT of the counter with the count value CR of the counter 14 in the receiver as shown in step 31 of FIG. 3 (step 31). Counter 1
If the count value CR of 4 is less than or equal to the received count value CT, the received ID code is regarded as a signal transmitted from the correct transmitter, and the received ID code is determined by the ID code discriminating unit 1.
Give to 3. The ID code discriminating unit 13 reads the unique ID code from the ID code storage unit 15 in step 32, and discriminates in step 33 whether these ID codes match. If the ID codes match, a match control signal is output to the outside and a match signal is given to the counter 14 to count the count value C of the counter 14.
The R is incremented and the process ends. Step 31
If the count value of the counter number received at is smaller than the count value of the counter 14 in the receiver, it is determined that the signal is a signal from the receiver that has been stolen based on the transmission data from the transmitter 1, and the processing is ended. Furthermore, in step 33, even if the ID codes do not match, it is determined that the signal is from another transmitter, and the process is terminated.

In this way, even if a stolen transmitter is used, if the count value of the receiver is not smaller than the count value of the transmitter, there will be a mismatch, so that it cannot be used during use. Here, since the counter 5 is incremented each time a code is transmitted from the transmitter 4, the maximum count value is determined by the capacity of the battery 7 so that the count value CT does not become zero due to overflow. For example, if the maximum number of transmissions is 800 times depending on the capacity of the battery 7, the counter is a 4-digit counter. In this way, the transmission code can be transmitted with a new incremented count value without overflow and the count value becoming 0. Even if it is transmitted by the transmitter 1, it may not be surely transmitted to the receiver 10. In this case, the counter 14 is not counted up. Therefore, the count value of the counter 14 of the receiver 10 is smaller than or equal to the count value of the transmitter 1. Therefore, if this relationship is reversed, it can be determined that a stolen transmitter is being used. When the battery 7 is converted, the count value of the counter 5 is not held and thus is reset.
At this time, the counter on the receiver 10 side is also reset by the reset unit 15 at the same time.

[0014]

As described in detail above, according to the present invention, a transmitter is plagiarized and the code signal is known to a third party, or another transmitter that generates the code signal is used by the third party. Even if it is used, the counter of the receiver counts up each time it is used, and thus the use is prohibited if the relationship of the count values of the counters of the transceiver is reversed. Therefore, the stolen receiver cannot be operated immediately. Therefore, it is not necessary to mutually transmit data between the transmitter and receiver and change their codes, and it is possible to perform remote control control reliably with a relatively simple configuration and improve safety. .

[Brief description of drawings]

FIG. 1 is a block diagram showing an overall configuration of a remote control device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the transmitter of this embodiment.

FIG. 3 is a flowchart showing the operation of the receiver of this embodiment.

[Explanation of symbols]

 1 transmitter 2,15 ID code storage unit 3 transmission code conversion unit 4 transmission switch 5,14 counter 6 transmission unit 7 battery 10 receiver 11 reception unit 12 count number comparison unit 13 ID code determination unit 16 reset unit

Claims (2)

[Claims] 1. A remote control device comprising: a transmitter for transmitting a code signal; and a receiver for discriminating the code signal from the transmitter and outputting a control signal when they coincide with each other, wherein the transmitter comprises: A transmission switch, an ID code storage section for storing a unique ID code, and a first count-up each time the transmission switch is turned on.
A counter, a transmission code conversion unit that converts the count value of the counter and the ID code stored in the ID code storage unit each time the transmission switch is pressed, as a transmission code signal; And a receiver for receiving the signal from the transmitter and demodulating the transmission code, and the same ID code as the transmitter. An ID code storage unit for storing, a second counter, compares the count value received every time a signal is received from the transmitter with the count value of the second counter in the receiver, and Comparing unit that determines whether the count value of the second counter is equal to or smaller than the received count value, and the ID received when the determination output is obtained from the comparison unit.
An ID code discriminating unit that discriminates the coincidence between the code and the ID code in the ID code storage unit in the receiver, outputs a control signal when they coincide, and counts up the second counter. Characteristic remote control device. 2. A remote control method of transmitting a code signal from a transmitter and receiving the signal by a receiver, wherein a counter in the transmitter is counted up each time the transmission switch of the transmitter is pressed, Each time the button is pressed, the unique ID code and the count value of the first counter in the transmitter are transmitted as a transmission code, the transmission code transmitted in the receiver is received, and the count value of the received counter is By comparing with the count value of the second counter in the receiver, it is determined that the count value of the second counter in the receiver matches or is smaller than the received count value, and when the determination output is obtained, it is received. A remote controller characterized by determining whether the ID code storage unit in the receiver matches the transmitted ID code, outputting a control signal when the ID codes match, and up-counting the second counter in the receiver. Control method.