JPH07184282A - Remote controller for vehicle load - Google Patents

Abstract

PURPOSE:To prevent a transmission signal from a remote key from becoming not receptible by other communication radio wave signal. CONSTITUTION:A transmission circuit of a remote key is provided with two oscillation circuits 22, 23 able to provide outputs of carriers whose frequencies f1, f2 are in the relation of a non-integer multiple and the carrier is alternately modulated by an ID code stored in a key side memory 19 depending on the operation of an operation switch 4 and the modulated signal is outputted as a radio wave signal. A receiver uses two RF circuits to demodulate signals of corresponding carriers and to detect the ID code, a collation circuit collates the ID code with an ID code stored in a vehicle side memory and provides an output of a matching detection signal when they are matched. Even when other communication radio signal is in existence, since no interference onto both the carriers takes place, the reception collation is surely implemented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle load remote control device for remotely controlling a vehicle load such as a door lock mechanism.

[0002]

2. Description of the Related Art Some vehicles such as automobiles are equipped with a so-called wireless door lock device. The transmitter circuit is installed inside the key grip of the remote key that can be inserted into the ignition key cylinder and the door key cylinder, and the radio circuit is transmitted by operating the transmitter circuit when the driver turns on the operation switch. Then, the receiving device provided on the vehicle body side receives and decodes the radio wave signal, and when the radio wave signal is the signal of the identification code specified for the car, the door lock mechanism is operated to open the door. It is configured to automatically lock or unlock automatically.

Such a wireless door lock device is
The user can automatically lock the door or automatically unlock the door by simply operating the operation switch to cause the transmission circuit to perform the transmission operation, which is very convenient in use.

[0004]

However, since the output level of the radio wave signal transmitted by the remote key is a weak level, for example, a communication radio wave signal used for another communication within the frequency band of the transmission signal, etc. In an environment in which the signal is transmitted, the original transmission signal from the remote key is interfered by the other communication radio wave signal at the receiver on the vehicle body side, and the transmission signal from the remote key is received at the receiver. There is a problem that the identification code cannot be collated because it cannot be received correctly.

In this case, if the receiving device of the vehicle body does not perform the receiving and collating operation on the transmission signal of the remote key, the door cannot be locked or unlocked by the remote key. There is a possibility that it may be mistaken for a failure of the receiving device, leading to a decrease in reliability and a problem that usability deteriorates.

The present invention has been made in view of the above circumstances, and an object thereof is to propagate in the air from a remote key without being interfered with even in an environment in which another communication radio signal is propagated. Another object of the present invention is to provide a remote control device for a vehicle load that can reliably receive a signal.

[0007]

A remote control device for a vehicle load according to the present invention comprises an operating means provided on a remote key,
Oscillation means for cyclically outputting a plurality of carrier waves whose frequency values are non-integer multiples, and prestored for each of a plurality of carrier waves cyclically output from the oscillator means according to the operation of the operating means. Transmitting means for modulating using the identification code signal that is transmitted as an airborne signal, receiving means provided on the vehicle body side for receiving the airborne signal corresponding to the plurality of frequencies, and the receiving means. The identification code included in the signal received by the means is collated with an identification code stored in advance, and collation means for outputting a coincidence detection signal when they coincide with each other is provided.

[0008]

According to the remote control device for a vehicle load of the present invention,
When the operating means of the remote key is operated, the transmitting means modulates using a previously stored identification code signal for each of a plurality of carrier waves cyclically output from the oscillating means and transmits as an airborne signal. On the vehicle body side, when the receiving means receives the airborne propagation signal corresponding to a plurality of frequencies and the matching means matches the identification code included in the received signal with a previously stored identification code and matches them. The coincidence detection signal is output.

Thus, for example, in an environment in which another communication radio signal overlapping the frequency band of the carrier wave output from the oscillating means is propagated, any one of the carrier waves of a plurality of frequencies output from the remote key is transmitted. Even if the carrier wave of is interfered by another communication radio signal, the receiving means can receive the airborne signal which is the carrier wave of the remaining frequency that is not interfered, so that the identification code can be surely recognized. Then, the collating means can perform the collating operation.

Further, in the above case, the frequencies of a plurality of carrier waves are set so as to be a non-integer multiple, so that when the frequency of another communication radio wave signal is near the frequency of one of the carrier waves, the communication is performed. Even if the harmonic components of the radio wave signal are included to a degree that cannot be ignored, the harmonic components at that time do not overlap with the frequencies of other carrier waves, so that it is possible to reliably receive the transmission signal. Become.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 3 shows an outline of the entire configuration. The remote key 1 is composed of a key plate 2 and a key grip 3 supporting the key plate 2. The key grip 3 is provided with an operation button 4 as an operation means, and the inside thereof is provided. A transmission circuit 5 is provided. Then, as will be described later, when the operation switch 4 is operated, the transmission circuit 5 transmits a code signal including an ID code which is an identification code as a radio wave signal which is an air propagation signal.

The receiving device 6 provided on the vehicle side is adapted to receive an aerial propagation signal via an antenna 7. The input terminal of the receiving device 6 is an IG key position switch 8, which is provided on an ignition key cylinder, The IG key ACC switch 9 is connected so that a key insertion detection signal is input and a detection signal of the ignition ACC rotation position is also input. Also, the receiving device 6
A door courtesy switch 10 for detecting opening / closing of the door is connected to the input terminal of the preset switch 1
1 is connected.

On the other hand, at the output terminal of the receiver 6, a door lock device 12 for electrically driving a door lock mechanism (not shown) and an alarm device 1 for performing a notification operation.
3 are connected, and each of them is operated according to a control signal given from the receiving device 6.

FIG. 1 shows the electrical configuration of the transmission circuit 5 provided on the remote key 1 side. That is, the switch circuit 14 outputs an operation command signal, the battery 15 is connected to the power supply input terminal thereof, and the operation switch 4 described above is connected to the input terminal thereof. When the operation switch 4 is turned on, the switch circuit 14 outputs the switch control signal from the control output terminal and the DC power supply voltage of the battery 15 from the power supply output terminal as the control power supply voltage for each circuit. ing.

The control output terminal of the switch circuit 14 is connected to each control input terminal of the clock circuit 16, the shift register 17, and the switching circuit 18. The clock circuit 16 is
When the switch control signal is given from the switch circuit 14, the clock signal is output from the output terminal, and the output terminal is connected to the clock input terminal of the shift register 17. In addition, the shift register 17
Is an ID as an identification code output from the key side memory 19 when a clock signal is given from the clock circuit 16.
The code is sequentially shifted and output from the output terminal,
The output terminal is connected to the modulation input terminal of the modulation circuit 20 and is also connected to the input terminal of the switching circuit 18 via the synchronization circuit 21.

The first and second oscillating circuits 22 and 23 as oscillating means respectively have first and second carrier waves f1 and f2 whose frequencies are non-integer multiples.
(For example, in the case of f1> f2, the relationship of f1 = k × f2 (k is a non-integer)) is output, each control input terminal is connected to the switching circuit 18, and each carrier output terminal is the modulation circuit 20.
It is connected to the carrier wave input terminal of.

The output terminal of the modulation circuit 20 is connected to the antenna 25 through the output circuit 24,
The carrier wave given from the first and second oscillating circuits 22 and 23 is modulated by the ID code from the shift register 17 and is transmitted from the antenna 25 via the output circuit 24 as a radio wave signal as an aerial propagation signal. Has become.

In this case, the code signal transmitted as the radio wave signal has the start signal Ss before the ID code signal Sd.
Is added, and the end signal Se is added later. Note that the antenna 25 actually uses the key plate 2 of the remote key 1.

FIG. 2 shows an electrical configuration of the receiving device 6 provided on the vehicle body side of a vehicle such as a vehicle. That is, the first and second RF (high frequency) circuits 26 and 27 as receiving means demodulate a code signal from the radio wave signal received by the antenna 7 and output it as a reception code signal from the output terminal. Possible frequency ranges are set corresponding to the two carrier frequencies f1 and f2. First and second RG circuits 26 and 2
Each output terminal of 7 is connected to the input terminal of the power supply control circuit 29 via the OR (OR) circuit 28, and is connected to the input terminal of the waveform shaping circuit 31 via the OR (OR) circuit 30. .

The power supply control circuit 29 has its power supply input terminal connected to the battery 32 of the automobile, and receives a reception code signal from the first or second RF circuit 26 or 27 via the OR circuit 28. Power is supplied from the battery 32 and the control power supply voltage for each circuit is output from the power supply output terminal. Also, the waveform shaping circuit 3
When a reception signal is given from the first or second RF circuit 26 or 27 via the OR circuit 28, the waveform No. 1 waveform-shapes the received reception code signal, thereby transmitting the transmission circuit 5 on the remote key 1 side. The output terminal outputs a reception code signal including the ID code transmitted from the output terminal, and the output terminal is connected to the reception code detection synchronization circuit 33 and the ID code shift register 34.

The reception code detecting / synchronizing circuit 33 outputs the control signal from the control output terminal when the reception code signal is given from the waveform shaping circuit 27, and the control output terminal thereof is the control input of the clock circuit 35. It is connected to the terminal. The clock circuit 35 is configured to output a clock signal from an output terminal when a control signal is given from the reception code detection synchronization circuit 33, and the output terminal is connected to the clock input terminal of the ID code shift register 34. There is.

When the ID code shift register 34 receives a clock signal from the clock circuit 35, the ID code shift register 34 sequentially shifts the contents of each bit of the received code signal input from the waveform shaping circuit 31 and outputs the contents from the data output terminal. It has become. The collation circuit 36 as a collation unit collates the ID code of the received code signal with the ID code stored in the vehicle body side memory 37, and outputs a coincidence detection signal when the collation results coincide with each other. The code input terminal is connected to the data output terminal of the ID code shift register 34, and the verification code input terminal is the vehicle body side memory 37.
It is connected to the data output terminal of.

The vehicle body side memory 37 is composed of a rewritable memory. The preset switch 11 is connected to the rewrite control input terminal. When the preset switch 11 is operated, the remote key 1 side is operated. I
When the transmission signal including the D code is given, the ID code is stored as a new ID code as described later. Then, in the vehicle body side memory 37,
A read control signal is supplied from the ID code shift register 34, whereby the ID code data stored inside is output to the matching circuit 36.

As will be described later, the door lock control circuit 38 gives a lock signal or an unlock signal to the door lock device 12 when a coincidence detection signal as a control signal is given from the collating circuit 34, so that the vehicle is not shown. By operating the door lock mechanism of the automobile as a service load, the door of the automobile is locked or unlocked.

Next, the operation of this embodiment will be described with reference to FIG. First, when the operation switch 4 of the remote key 1 is turned on by the user, in response to this, in the transmission circuit 5, the switch circuit 14 has the battery 1
5, the DC voltage is applied, and the operation command signal is applied to the clock circuit 16, the shift register 17, and the switching circuit 18. As a result, the shift register 17 sequentially shifts the ID code as the identification code output from the key side memory 19 when the clock signal is applied from the clock circuit 16 and outputs the ID code from the output terminal as the ID code signal.

In this case, the ID code stored in the key side memory 19 is composed of, for example, a 20-bit digital signal, and is set so as to have a unique value for each automobile. 17 is this ID
The code is repeatedly output a predetermined number of times.

When the ID code signal is given from the shift register 17, the synchronizing circuit 21 outputs a synchronization switching signal to the switching circuit 18 for each ID code signal once. In response to this, the switching circuit 18 sets the first and second oscillating circuits 22 and 23 so as to alternately operate each time the ID code signal is input once from the shift register 17. .

In the modulation circuit 20, the carrier wave having the frequency f1 or f2 alternately given from the first and second oscillation circuits 22 and 23 is modulated by the ID code signal given from the shift register 17 and transmitted. A signal is generated, and this is transmitted from the antenna 25 via the output circuit 24 as a radio wave signal.

In this case, the ID code signal Sd has a start signal Ss at its head and an end signal S at its tail.
As a result, the transmission signal output from the remote key 1 is divided into a transmission signal having a carrier frequency f1 and a transmission signal having a carrier frequency f2, as shown in FIG. It is output in a state where it is switched alternately.

Now, on the vehicle body side, the remote key 1
When the transmission signal output from is received via the antenna 7, the first and second RF circuits 26 and 27 simultaneously demodulate. In this case, the first RF circuit 26 demodulates the reception signal of the carrier frequency f1 and the second RF circuit 27 demodulates the reception signal of the carrier frequency f2 and outputs the ID code signal.

When the ID code signal is applied from at least one of the RF circuits 26 and 27 via the OR circuit 28, the power supply control circuit 29 supplies the control power supply voltage to each circuit. On the other hand, when the waveform shaping circuit 31 receives the ID code signal from at least one of the RF circuits 26 and 27 via the OR circuit 30, the waveform shaping circuit 31 performs the waveform shaping on the ID code shift register 34 and the synchronizing circuit 33 as a received code signal. Will be output to.

When the ID code signal is given, the synchronizing circuit 33 outputs a control signal to the clock circuit 35 corresponding to each code signal to give the clock signal to the ID code shift register 34. As a result, the ID code shift register 34 sequentially shifts the content of each bit of the reception code signal input from the waveform shaping circuit 31 in accordance with the clock signal supplied from the clock circuit 35, and the matching circuit from the data output terminal. Output to 36.

The collation circuit 36 collates the data signal from the ID code shift register 34 with the ID code read from the vehicle body side memory 37, and outputs a coincidence detection signal to the door lock control circuit 38 when the collation results coincide. Come to do. As a result, the receiving device 6 becomes the door lock device 1
A lock signal or an unlock signal is output to 2 as a control signal to cause the door lock mechanism to perform a locking operation or an unlocking operation.

In this case, the door lock control circuit 38 recognizes the coincidence detection signal as an unlock signal and causes the door lock device 12 to unlock when the door lock mechanism locks the door of the automobile. When the door lock mechanism unlocks the door, the coincidence detection signal is recognized as a lock signal and the door lock device 12 is caused to perform the lock operation.

As a result, if the receiving device 6 can receive the code signal obtained by modulating the carrier wave of at least one of the frequencies f1 and f2 of the transmission signal output from the remote key 1, the collating operation can be performed. Therefore, for example, the frequency f1 or f2 of one carrier wave
Even in an environment where there is an interfering radio wave in a frequency band substantially the same as the other frequency f2 or f1 does not match the harmonic component of the frequency, so that the carrier wave is not adversely affected, so that the signal is reliably received. It is possible.

In the above case, if the remote key 1 is used to perform the remote door lock operation, the control device 6 detects the vehicle being parked and prevents the theft. As a function of, will come to set the alert mode.

That is, as a parking measure for an automobile, all the doors are closed, the trunk and the engine hood are closed, the engine is stopped, and no key is inserted into the ignition key cylinder. The control device 6 determines the above-mentioned state based on detection signals from the door courtesy switch 10, the IG key position switch 8 and the like.

When the lock signal including the correct ID code is received from the remote key 1 while the parking measure is taken, the receiver 6 sends the door lock control signal to the door lock device 12 as described above. Except when receiving an unlock signal containing the correct ID code from the remote key 1 after setting the alarm mode by giving the lock operation, the door or trunk or the engine hood is opened or the door key is opened. When a key is inserted into a cylinder or an ignition key cylinder and is tampered with, a malfunction is determined based on detection signals from various switches and an alarm signal is output to the alarm device 13 to warn the operator. It makes an action and makes an intruder give up an illegal act.

Further, when the ID code is transmitted from the remote key 1 while the preset switch 11 is operated as a readable / writable memory for the vehicle body side memory 37, the ID code of the vehicle body side memory 37 can be changed and registered. Thus, for example, even if the ID code is illegally copied, it is possible to prevent the fraudulent activity by changing and registering the ID code.

According to this embodiment as described above, the transmission circuit 5 of the remote key 1 outputs the transmission signal obtained by modulating the carrier waves of the two frequencies f1 and f2 by the ID code,
This is received on the side of the receiving device 6 by the two RF circuits 26 and 27 corresponding to the frequencies of the respective carrier waves, and the matching operation is performed. Therefore, the transmission signal from one carrier wave is received by the other interfering radio waves. Even if the 6th side cannot receive the signal, it can be surely received by the transmission signal of the other carrier, and the frequency f of the two carriers is f.
Since the relationship between 1 and f2 is set to be a non-integer multiple relationship, a harmonic component of an interfering radio wave that adversely affects the transmission signal of one carrier may adversely affect the transmission signal of the other carrier. The reception matching operation can be performed more reliably, and the reliability is also improved.

In the above embodiment, the case where the frequencies of the carrier waves are set to two frequencies f1 and f2 has been described. However, the present invention is not limited to this and, for example, a transmission signal using three or more carrier waves of different frequencies. Can also be configured.

Further, in the above embodiment, the case where the two oscillating circuits 22 and 23 are used as the oscillating means has been described, but the present invention is not limited to this, and one oscillating circuit generates carrier waves having different frequencies f1 and f2. It is also possible to have a configuration capable of outputting.

[0043]

The remote control device for a vehicle load according to the present invention comprises:
As described above, the remote key is provided with the oscillating means for cyclically outputting a plurality of carrier waves whose frequency values are non-integer multiples, and the transmitting means cyclically outputs the oscillating means in response to the operation of the operating means. Each of a plurality of carrier waves output to the vehicle is modulated using an identification code signal stored in advance and transmitted as an aerial propagation signal, and the receiving means on the vehicle body side receives the aerial radio signal corresponding to the plurality of frequencies. Since the collating operation is performed by the collating means, even if there is an interfering radio wave that matches a certain frequency of the carrier wave output from the oscillating means, the carrier waves of other frequencies are not adversely affected. , The identification code can be reliably recognized from the aerial radio signal received by the receiving means side, and the collating operation can be performed by the collating means. Since the frequency of the carrier wave of is set to a non-integer multiple, when the frequency of the jamming wave is near the frequency of either carrier wave, the harmonic component of the jamming wave is included in a level that cannot be ignored. Even if it is present, the harmonic component at that time does not overlap with the frequencies of other carrier waves, so that it is possible to reliably receive the transmission signal, which is an excellent effect.

[Brief description of drawings]

FIG. 1 is an electrical block diagram of a transmission circuit showing an embodiment of the present invention.

FIG. 2 is an electrical block diagram of a receiving device.

FIG. 3 is a block configuration diagram showing an outline of the overall configuration.

FIG. 4 is a time chart of a transmission signal

[Explanation of symbols]

1 is a remote key, 4 is an operation switch (operation means), 5
Is a transmitting circuit, 6 is a receiving device, 7 is an antenna, 11 is a preset switch, 12 is a door lock device (vehicle load), 13 is an alarm device, 14 is a switch circuit, 15
Is a battery, 16 is a clock circuit, 17 is a shift register,
Reference numeral 18 is a switching circuit, 19 is a key side memory, 20 is a modulation circuit (transmission means), 21 is a synchronization circuit, 22 and 23 are first and second oscillation circuits (oscillation means), 25 is an antenna, 2
6, 27 are first and second RF circuits (reception means), 2
9 is a power supply control circuit, 31 is a waveform shaping circuit, 32 is a battery, 33 is a received code detection synchronizing circuit, 34 is an ID code shift register, 35 is a clock circuit, 36 is a matching circuit, 37 is a vehicle side memory, and 38 is a door. It is a lock control circuit.

Claims (1)

[Claims] 1. An operating means provided on a remote key, an oscillating means for cyclically outputting a plurality of carrier waves whose frequency values are in a non-integer multiple relationship, and the oscillating means in response to an operation of the operating means. And a transmitting means for modulating each of a plurality of carrier waves cyclically output from the carrier using an identification code signal stored in advance and transmitting as an aerial propagation signal to the vehicle body side. And a collating means for collating an identification code included in the signal received by the receiving section with an identification code stored in advance and outputting a coincidence detection signal when they coincide with each other. A remote control device for a vehicle load, comprising: