JPH0747907B2 - Remote control device for vehicle lock - Google Patents

Description

TECHNICAL FIELD The present invention relates to a remote control device for locking and unlocking a lock provided on a door of a vehicle such as an automobile at a position remote from the vehicle.

"Prior Art" Many of the locks installed on the doors or trunks of automobiles are operated by inserting and operating a key to lock or unlock the lock. A remote control device has been developed that can be locked and unlocked at a position away from a vehicle by using an optical control signal.

This remote control device includes a receiver provided in a vehicle and a portable transmitter that is independent of the vehicle.

Then, a control signal according to the predetermined keyword information (key number) given to each car according to the coded information is emitted from the transmitter according to the trigger operation.

Specifically, the coded information is directly converted into a pulse width of a minimum width according to the pulse number modulation method, and the pulse train is electrically or optically transmitted as a control signal. Infrared energy is used as the signal.

Further, the receiver receives the control signal, demodulates or decodes it, reproduces the coded information, compares the coded information with preset lock side memory information, and affirms by this comparison. The lock control signal is output only when

The control signal controls the lock mounted on the door or the trunk, and controls the locked lock to be unlocked and the unlocked lock to be locked.

In order to prevent repetition of locking and unlocking caused by repeated transmission of the control signal, as long as repeated transmission of the control signal is performed within a predetermined time, it will be changed from "locked" to "unlocked" or "unlocked". This is a one-way transition of "locking".

The lock controlled in this way is provided with an electromagnetic drive mechanism which operates in response to the control signal.

Also, lock control is performed simultaneously for all door locks, but the door lock and trunk lock are controlled separately.
The receiving area of each receiver provided on the door lock and the trunk lock is defined.

On the other hand, such a conventional remote control device,
Since the control signal is a pulse train of extremely small width obtained by converting the keyword information, there is a risk of malfunction due to the influence of electrical noise.

FIG. 6 shows an example of a pulse train transmitted as a control signal. Each pulse width is set to 0.1 msec, the interval between sync pulses P is set to 2.5 msec, and when there is no signal pulse between sync pulses P, a code is generated. It represents "0" and the code "1" when the signal pulse P1 is present therebetween.

Since such a control signal is code-reproduced by counting the number of pulses, the electrical noise pulse PX is generated as shown by a phantom line in the figure, and the code "0" is reproduced as "1", which causes a malfunction.

Electrical noise is a problem that is difficult to prevent because there are various conditions such as the case where it is caused by the operation of the device and when it is affected by ambient noise.

"Problems to be solved by the invention" This type of remote control device operates the transmitter at a place away from the automobile, and in particular, when locking, the device operation may be trusted and the result may not be confirmed. .

Therefore, the malfunction causes the vehicle to be informed while the doors and other locks are unlocked, which may result in an accident such as theft of the mounted article, and eventually the theft of the vehicle.

Further, since such a remote control device may repeatedly operate the transmitter, there is a risk that the vehicle may be informed while being unlocked due to a malfunction.

"Means for Solving Problems" The present invention was developed in view of the above problems, and a remote control device of the first invention is a receiver mounted on a vehicle and a transmitter independent of the vehicle. In the remote control device for controlling the locking or unlocking of the door lock by receiving a control signal of the transmitter transmitted from a position remote from the vehicle, the transmitter is a specific transmitter. The receiver comprises: a unit for replacing the keyword information with a plurality of pulse signals corresponding to a pulse width or a pulse phase; a unit for modulating the pulse signal; and a unit for transmitting the modulated signal as a control signal. Means for receiving and demodulating a control signal, means for comparing the demodulated signal with a collation code and outputting a control signal when a predetermined relationship is established, And a means for re-locking the door when the door is not opened within a predetermined time after the unlocking operation based on the control signal.

A remote control device according to a second aspect of the present invention includes a receiver mounted on a vehicle and a transmitter independent of the vehicle, and the receiver controls the transmitter transmitted from a position distant from the vehicle. In a remote control device that receives a signal and controls locking or unlocking of a door, the transmitter has means for modulating a signal corresponding to specific keyword information and means for transmitting the modulated signal as a control signal. The receiver comprises means for receiving and demodulating the control signal, means for comparing the demodulated signal with a collation code and outputting a control signal when a predetermined relationship is satisfied, and a means for responding to the control signal. Then, the lock is unlocked when the lock is in the locked state, and a means for locking the lock when the lock is in the unlocked state and the control signal is repeatedly received within a predetermined time. Structure comprising means for controlling unlocking or one-way control of unlocking from unlocking and means for re-locking when the door is not opened within a predetermined time after unlocking operation of the lock based on the control signal I am doing it.

"Action" The transmitter replaces specific keyword information with a plurality of pulse signals corresponding to the pulse width or the pulse phase, and transmits the control signal.

The receiver receives the control signal and locks or unlocks only when the control signal has a predetermined relationship with the collation code.

Further, this remote control device outputs a control signal for re-locking when the door is not opened within a predetermined time after controlling to unlock, and the lock is automatically locked.

[Examples] Next, examples of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an electric circuit of a transmitter which is made portable and can be used independently of an automobile. 11 is an information setting circuit for setting keyword information, 12 is an information processing circuit, 13 is a trigger switch, and 14 is I'm a driver.

The information setting circuit 11 is for presetting a specific key number code for each vehicle. For example, "1, 0, 0,
The code is set in a binary signal format such as "1, 1, 0, 0".

As an example of this code setting, each code setting input terminal of the microcomputer can be connected to a power supply line or a ground line.

The information processing circuit 12 is a circuit that replaces the keyword number code with a predetermined pulse width and pulse-modulates the replacement pulse.

The pulse replacement performed by this circuit is a step of replacing the number code with the width of each pulse generated with a constant amplitude, as shown in FIG. 0 "appears as a narrow pulse P11 at a constant timing.

The above-mentioned replacement pulse is modulated by the carrier wave shown in FIG. 3 (b) to obtain the pulse-modulated output signal shown in FIG. 3 (c).

This output signal becomes a pulse group train of carrier pulses generated corresponding to the pulse width of each code replacement pulse.

The code replacement pulse and its pulse modulation as described above can be performed by programming the microcomputer in advance, and by inputting the performance value keyword number code to the microcomputer,
A modulated pulse can be produced as the output of the microcomputer. Further, the pulse modulation may be performed by a known circuit configuration known as a pulse modulation transmission system.

The driver 14 is a known high-speed pulse drive circuit that drives the infrared light emitting diode 15. The light emitted from the infrared light emitting diode 15 is emitted as infrared energy.

The transmitter circuit described above includes a power source such as an alkaline battery, and each circuit is powered by closing the trigger switch 13. As a result, the code of the information setting circuit 11 is replaced with the pulse width by the information processing circuit 12 and is pulse-modulated, and the driver 14 drives the infrared light emitting diode 15 according to the modulation signal.

The infrared light emitting diode 15 emits light in accordance with the modulation signal of FIG. 3 (c), and this infrared energy becomes a control signal and is transmitted to a receiver described later.

FIG. 2 is a block diagram showing an electric circuit of a receiver installed in an automobile, and 17 is a photodiode for detecting the infrared energy transmitted through the filter 18.

The filter 18 is a known one such as an infrared filter or an absorption filter.

Reference numeral 19 is an amplifier, 20 is a demodulation circuit, 21 is a waveform shaping circuit, and these amplifier 19, demodulation circuit 20 and waveform shaping circuit 21 can be integrally formed as a preamplifier IC 22 for light reception, and the demodulation circuit 20 transmits pulse modulation. A known circuit configuration as known by the method may be used.

Reference numeral 23 is an information processing circuit, 24 is a collation code setting circuit, 25 is a driver, and 26 is a lock driving mechanism as a load.

The output signal of the photodiode 17 becomes a pulse-modulated photoelectric conversion output signal as shown in FIG. 3D, and this output signal is input to the light receiving preamplifier IC 22.

The light-receiving preamplifier IC 22 amplifies, demodulates, and shapes the waveform of the photoelectric conversion output signal, and outputs the pulse signal 27 shown in FIG. 3 (e). This output signal 27 has the same shape as the code replacement pulse of the transmitter.

The information processing circuit 23 inputs the output signal 27, and the signal 27
Of the binary signal format “1, 0,
0, 1, 1, 0, 0 ”is reproduced.

Further, the information processing circuit 23 includes a comparison circuit for comparing the reproduction code and the collation code, and outputs a control signal 28 when the codes of these two systems match.

As a means for comparing the reproduction code and the collation code, the respective pulse numbers according to the two codes may be compared, but the demodulation pulse as shown in FIG. 3 (e) is integrated and collated with this integrated voltage. The comparator may be configured to compare with the reference voltage according to the code.

The information processing circuit 23 for comparing the reproduction code and the collation code as described above may use a known comparison circuit or the like, but it may be programmed in advance by using a microcomputer.

The collation code is preset in the collation code setting circuit 24, which is configured similarly to the information setting circuit 11 provided in the transmitter circuit.

The driver 25 is a circuit which operates by receiving the control signal 28, and controls the lock driving mechanism 26 to lock or unlock the lock driving mechanism 26. The driver 25 and the lock driving mechanism 26 are known.

The switch 29 is a switch interlocking with locking and unlocking, which gives a "0" signal to the information processing circuit 23 when it is closed, and this circuit 23 is in the locked state or unlocked state by the above signal input. Depending on the state, "Lock" to "Unlock" or
It outputs the control signal required to shift from "unlocked" to "locked".

Since the receiver configured by the above circuit is configured to receive the infrared energy according to the pulse modulation as the control signal, demodulate and decode it, for example, as shown in FIG. When mixed during the modulation pulse, this pulse PX is removed in the demodulation process (the same frequency as the carrier wave is demodulated), it is not reproduced as a code, and the noise pulse is mixed in the modulation pulse. Even if it did, the demodulated pulse (Fig. 3 (e))
Are integrated and compared, the influence of the noise pulse is extremely small.

On the other hand, the control signal transmitted from the transmitter contains many information contents, and is specifically formed as a pulse frame shown in FIG.

This frame is an example, but is composed of 17 bits in total, the width of the code replacement pulse is formed in three steps of 3 milliseconds, 2 milliseconds, and 1 millisecond, and this pulse is pulse-modulated with a carrier of 40 KHz.

The pulse P20 bears the start signal, the 16-bit pulse P21 bears the key number code, the pulse P22 bears the door lock / trunk lock discrimination signal, and the pulse P23 bears the end signal.

In the above embodiment, the keyword information is replaced by the pulse width corresponding to the information. However, this may be replaced by the phase of a pulse having a constant width, or the keyword information may be ternary instead of binary. As a form, the same information amount can be transmitted with a small number of transmission bits by distinguishing the width or position of the transmission pulse into three patterns. In this case, it is possible to reduce the transmission time and the transmission power consumption.

In addition, if the receiver is equipped with a confirmation means such that the interior light is temporarily turned on in response to receiving the control signal, or the buzzer is temporarily sounded, the reception state of the receiver is changed from the automobile. It can be confirmed at a remote location.

Further, when the transmitter is locked by the first operation and unlocked by the next operation, it is automatically locked again unless the door or the trunk is opened within a predetermined time (for example, within 5 seconds). With the configuration, the lock is advantageous even in the case of the repeated control signal of the transmitter.

FIG. 5 is a flow chart showing the operation of the receiver having such a re-locking structure.

As shown in the figure, when the receiver receives the control signal, demodulation, waveform shaping, and decoding are performed, and the signal code of the control signal and the collation code are compared. (Refer to steps ST100 to ST104) When the signal code matches the collation code, it is confirmed whether the lock is locked or unlocked. If it is locked, a control signal for unlocking is output and the lock Unlocked again
If in the unlocked state, a control signal for locking is output and the lock is locked. (Refer to steps ST106 to ST108, ST109, and ST110) When the door or the trunk cannot be opened within a predetermined time after the lock is unlocked, a lock control signal is output to lock the lock. (Steps ST111, ST112, ST109, S
(Refer to T119) It should be noted that even if the above-mentioned receiver controls all door locks of the automobile, and even if the control signal from the transmitter is repeated within a short period of time, "lock" and "unlock" or "unlock" The unidirectional control from "to lock" is the same as the conventional device. (Refer to Step ST105) The remote control device according to the present invention can be similarly implemented by setting the control signal as an electric wireless signal without using infrared energy.

[Advantages of the Invention] As described above, since the remote control device according to the first aspect of the present invention uses a plurality of pulses as a control signal, it is possible to perform various encryptions of keyword information and further Since it corresponds to the pulse width or the pulse phase, it is possible to transmit a large amount of information with a small number of transmission bits.

On the other hand, the remote control device of the second invention detects whether the lock is in the locked state or the unlocked state, and reverses the locked state by the operation of the transmitter, so that the locking or unlocking of the lock is ensured. Become.

Further, when the control signal is repeatedly received within the predetermined time, the one-way control is performed, so that chattering of locking and unlocking can be prevented.

Further, since the remote control device of the first invention and the second invention is equipped with a means for re-locking the door when the door cannot be opened within a predetermined time after unlocking the lock, the vehicle remains in the unlocked state. It is also advantageous in terms of theft prevention, as there is no risk of leaving it unattended.

[Brief description of drawings]

1 and 2 show an embodiment of the present invention, FIG. 1 is a block diagram showing an electric circuit of a transmitter, FIG. 2 is a block diagram showing an electric circuit of a receiver, and FIG. ), (B),
FIG. 3C is a diagram showing a code replacement pulse, a carrier wave, and a modulated pulse generated by the transmitter, and FIGS. 3D and 3E.
Is a diagram showing photoelectric conversion pulses and demodulated pulses generated by the receiver, FIG. 4 is a diagram showing the information content of the control signal transmitted by the transmitter, and FIG. 5 is a diagram showing the operation of the receiver. FIG. 6 is a diagram showing control signals used by a conventional device. 11 …… Information setting circuit 12 …… Information processing circuit 14 …… Driver 15 …… Infrared light emitting diode 17 …… Photo diode 18 …… Filter 19 …… Amplifier 20 …… Demodulation circuit 21 …… Wave shaping circuit 22 …… Preamplifier IC for light reception 23 …… Information processing circuit 24 …… Reference code setting circuit 25 …… Driver 26 …… Lock drive mechanism.

Claims (2)

[Claims] 1. A receiver mounted on a vehicle and a transmitter independent of the vehicle, wherein the receiver receives a control signal from the transmitter transmitted from a position remote from the vehicle to detect a door. In a remote control device for controlling locking or unlocking of a lock, the transmitter is a means for replacing specific keyword information with a plurality of pulse signals corresponding to a pulse width or a pulse phase, and a means for modulating the pulse signal. And a means for transmitting the modulated signal as a control signal, wherein the receiver controls by receiving the control signal and demodulating the demodulated signal and comparing the demodulated signal with a collation code to establish a predetermined relationship. A means for outputting a signal, and means for re-locking the door when the door is not opened within a predetermined time after the lock is unlocked based on the control signal.輌用 lock remote control device. 2. A receiver mounted on a vehicle and a transmitter independent of the vehicle, wherein the receiver receives a control signal from the receiver transmitted from a position remote from the vehicle to detect a door. In the remote control device for controlling locking or unlocking of a lock, the transmitter includes means for modulating a signal corresponding to specific keyword information and means for transmitting the modulated signal as a control signal. Is a means for receiving and demodulating the control signal, a means for comparing the demodulated signal with a collation code and outputting a control signal when a predetermined relation is established, and a lock in a locked state in response to the control signal. A means for unlocking this lock at a certain time, a means for locking this lock when the lock is in an unlocked state, and a means for unlocking or unlocking when a control signal is repeatedly received within a predetermined time A remote vehicle lock, comprising means for controlling the lock in one direction and means for re-locking when the door is not opened within a predetermined time after the lock is unlocked based on the control signal. Control device.