JPH01114193A - Remote controller for automobile - Google Patents

Abstract

PURPOSE:To prevent illegal use by driving a mechanism applying prescribed operation only when the voice inputted from a microphone of a transmitter is coincident with the voice specific to the user registered in advance thereby conducting sufficiently the security function. CONSTITUTION:A voice of a prescribed language is inputted from a microphone 5 of a transmitter 1 and a command code S1 is raised from an operation switch 11. then the voice is converted into a digital signal S3 by a voice recognition LSI 20 and a code signal S2 specific to the transmitter is outputted from a code setting circuit 21. A CPU 8 modulates the signals S1-S3 and sends the result from an antenna. The signals are received by a receiver 3 via an antenna of a car body 2, frequency-converted by a front end part 30 and the signals S1-S3 are fed to the controller 4. The microcomputer 31 compares the code of the code memory 33, the signal S2 and the voice pattern of the voice registration memory 32 and the signal S3 respectively, and when all of them are coincident, the signal S1 is made effective to drive a relay 34 thereby releasing the door lock. When they are not all coincident, the S1 is made ineffective and the door lock is not released.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a communication device used as a remote control device for a vehicle, etc., and is capable of opening and closing a vehicle door, etc., based on voice as a key signal unique to the user. The present invention relates to a remote control device for a vehicle having a security function that allows security functions to be performed.

[Background of the invention]

Recently, a remote control device for an automobile as shown in FIG. 6 has been developed. This device uses a transmitter 1 carried by the driver.
When the switch 11 is pressed, the signal is received by the antenna provided in the vehicle body 2 of the vehicle, and the receiver 3 and controller 4 in the vehicle body are activated. Under the control of the controller 4, the doors are unlocked and the interior lights are turned on.

Regarding this type of technology, for example, Japanese Patent Application No. 1983. -069
It is described in No. 564.

The invention of this prior application includes a transmitter that emits a signal including a unique ID code, a receiving circuit that receives the signal from the transmitter,
From the signal received by the receiving port, the transmitter-specific I
a code memory and a discrimination circuit for discriminating D codes;
It consists of an operation mode memory that stores the operation modes issued by the operation switch 11 of the transmitter, and a drive mechanism that performs predetermined operations on the automobile corresponding to each operation mode.

In this device, when a driver approaches a car and presses the operating switch on the transmitter, a signal containing an ID code unique to the transmitter and an operation mode signal is emitted, which is received by a receiver inside the vehicle. Ru. A unique ID code is determined from this received signal, and only when it is determined that the ID code matches the code stored in the code memory, the command by the operation mode signal is executed and the door lock is released. etc. will be carried out.

[Problem that the invention seeks to solve]

The above-mentioned prior art relies only on ID codes and transmission frequencies as security functions. Therefore, if the transmitter is destroyed and the ID code is determined, the security details will be easily revealed. Furthermore, since anyone who operates the transmitter can unlock the car's doors, there is a risk that if the transmitter is lost or stolen, it will be misused by a third party, resulting in a disadvantage to the car owner.

The purpose of the present invention is to ensure that security functions are fully considered and
To provide a remote control device for an automobile that can be operated only by a specific person.

[Specific Means for Solving the Problems] The remote control device for a vehicle according to the present invention includes a microphone for voice input serving as a key signal, and means for converting the voice signal input from the microphone into a digital signal. , a transmitter having an operation signal transmitting means for emitting a predetermined operation instruction signal to the vehicle; a receiving circuit installed in the vehicle and receiving the signal from the transmitter; The transmitter further comprises a signal decoding means for decoding the signal received by the receiving circuit, and a controller including a drive mechanism for performing a predetermined operation on the vehicle according to the decoding result by the signal decoding means. Or, if at least one of the signal decoding means is provided with a memory in which the voice serving as the key signal is registered, and the voice serving as the key signal input from the microphone matches the voice stored in the memory. The present invention is characterized in that the signal decoding means outputs an operation signal for causing the drive mechanism to perform a predetermined operation on the automobile only in this case.

[For production]

In the above-mentioned means, in a remote control device for a car, a microphone for voice input serving as a key signal to a transmitter and a means for oscillating a signal for issuing a predetermined operation instruction are provided, and a signal is received by a receiving circuit. The signal decoding means or transmitter for decoding the signal is provided with a memory in which the voice serving as the key signal is stored. Then, only when it is determined that the voice acting as a key signal manually inputted from the microphone matches the voice stored in the memory, a signal is output to the drive mechanism to perform a predetermined operation. Unauthorized use by a third party can be prevented by using voice as a key signal that can only be input by
The above object of providing a remote control device for a vehicle with sufficient security functions taken into consideration can be achieved.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an external view showing a first embodiment of a remote control device for an automobile according to the present invention, FIG. 2 is a circuit diagram of a transmitter, and FIG. 3 is a circuit diagram of a receiver and a controller.

In FIG. 1, reference numeral 1 is a transmitter, 3 is a receiver mounted within the vehicle body 2, and 4 is a controller also mounted within the vehicle body 2.

Figure 2 shows the structure of the transmitter, where 5 is a microphone and 6 is an amplifier.The voice input from the microphone 5 is amplified by the amplifier 6, and then sent to the voice recognition LSI.
20.

Although not shown, the voice recognition LSI 20 includes a comparator,
The comparator is made up of an integrator, etc., and is supplied with a sampling signal having a frequency of, for example, 16 KHz, as well as a signal from the integrator, which enables synchronization and increases the bandwidth. A limited digital signal is created.

Reference numeral 21 indicates a code setting circuit for setting an ID code, and this is made of, for example, a diode matrix, E
P ROM (Erasable and Pro
A unique ID code of the transmitter 1 is set by the position of a diode arranged on a matrix or by a stored program. The operation switch 11 is used to set a code for instructing operations such as unlocking the doors of the automobile.

The CPU 8 decodes the input signal from the operation switch 11 and outputs a predetermined code signal S1 corresponding thereto, and also decodes the unique ID sent from the code setting circuit 21.
A code signal S2 containing the code is output.

Further, the CPU 8 is supplied with a user-specific digitized voice signal S output from the voice recognition LSI 20, and the CPU 8 is supplied with a code signal S1% unique to the transmitter 1, which serves as an instruction signal for unlocking the door, etc. The code signal 32% audio signal SS containing the code is output to the amplitude modulation circuit 9.

The reference numeral 9 is for amplitude modulating a carrier wave by a high frequency signal in the UHF band, for example, by the code signal S1 and the code signal 32% digitized audio signal S3, and the modulated RF flaw signal RF The signal is amplified by the amplifier 10 and output from the antenna.

FIG. 3 shows the structure of a receiving circuit A and a controller B installed in an automobile. The receiving circuit A includes an input tuning circuit 16 for tuning to a predetermined frequency band, and a front end section 30 for forming an intermediate frequency signal.
It is equipped with an IF amplifier 15 for amplifying the intermediate frequency signal. The front end section 30 includes an RF amplifier 12 for amplifying the signal sent out from the input tuning circuit 16, a local oscillator 13 for generating a signal with a frequency different from the reception frequency by fi to form an intermediate frequency fi, and R.
It is constituted by a frequency mixer 14 for forming and outputting a difference frequency between the reception frequency supplied from the F amplifier 12 and the frequency supplied from the oscillator 13.

In FIG. 3, the controller 4 is provided with a microcomputer 31, as shown by a two-dot chain line B.
It includes a code signal S1 which is an instruction signal for unlocking the door, etc., sent from the amplifier 15 of the receiver 3, a code signal S2 containing the unique ID code of the transmitter 1, and an audio signal S3 consisting of a digital pattern unique to the user. A signal is supplied to this microcomputer 31. Further, in the controller B, there are provided a voice registration memory 32 in which the user's voice is registered, and a code memory 33 in which the unique ID code of the transmitter 1 set by the code setting circuit 21 is stored. .

Further, the controller 4 is provided with a relay 34 for unlocking the doors of the automobile, a switch for turning on an interior light, etc., and the relay 34, the switch, etc. are controlled by the microcomputer 31.

Note that to register the voice in the voice registration memory 32, the transmitter 1 is put into the voice transmission state, and the microcomputer 31 puts the voice registration memory 32 into the writing state, and then the user inputs an appropriate language (voice) into the microphone 5. This is done by entering.

The operation will be explained below.

With the transmitter 1 in a transmitting state, the user inputs the same language as the language registered in the voice registration memory 32 through the microphone 5. It also transmits a code signal Sl instructing to turn on the operation switch 11 and release the door lock.

The voice (analog signal) emitted by the user is amplified by the amplifier 6, converted by the voice recognition LSI 20 into a digital signal (voice signal) S3 constituted by a pattern unique to the user, and supplied to the CPU 8.

Further, the CPU 8 is supplied with a code signal S2 containing the unique ID code of the transmitter 1 from the code setting circuit 21 based on the operation of the operation switch 11, and a code signal SL instructing to unlock the door etc. is supplied. The CPU 8 outputs these code signals S1%S2 and digital signals S3, and these signals are sent to the amplitude modulation circuits 9 and R.
The signal is output from the antenna via the F amplifier 10.

The signal output from the antenna is received by the receiver 3 from the antenna of the vehicle body 2, and then sent to the front end section 3.
0 to an intermediate frequency, and then amplified by an amplifier 15. When a signal containing the code signals Sl, S2 and the digital signal S amplified by the amplifier 15 is supplied to the controller 4, the microcomputer 31 compares the code stored in the code memory 33 with the code signal S2. Also, microcomputer 3
1, the voice pattern stored in the voice registration memory 32 and the digital signal S are compared. If the microcomputer 31 determines that all of these match, a code signal Sl instructs to unlock the door.
is enabled, and the relay 34 and the like are driven under the control of the microcomputer 31 to unlock the doors of the automobile.

On the other hand, if one or both of the codes stored in the code memory 33 and the code signal S2 are different, or the audio pattern stored in the audio registration memory 32 and the digital signal S are different, that is, in the case of unauthorized use by a third party. The code signal SL instructing the release of the door lock is invalidated, and the car door remains locked.

Next, a second embodiment of the present invention will be explained with reference to the drawings of FIGS. 4 and 5.

FIG. 4 shows a circuit diagram of the transmitter, and FIG. 5 shows a circuit diagram of the receiver.

In FIG. 4, a microphone 5, an amplifier 6, an amplitude modulation circuit 9
, the RF amplifier 10 is the same as that of the first embodiment.

Although not shown in the figure, the speech recognition LSI 7 includes a comparator,
It has a built-in integrator, etc. The comparator is supplied with a sampling signal having a frequency of, for example, 16 KHz, as well as a signal from an integrator, which forms a synchronized, limited-bandwidth digital signal. It looks like this. This digital signal consists of a pattern specific to the user (voice registrant). Reference numeral 15 indicates a memory for word registration, and the voice as encrypted data such as rABcJ, which means unlocking the car door outputted from the above-mentioned comparator, and the voice as voiceprint data are combined into a digital signal. can be registered.

Note that the recognition mode and registration mode of the voice recognition LSI7 are C.
It is set by the PU8. Note that the recognition mode is a mode for actually performing speech recognition 1, and the registration mode is a mode for registering words to be recognized. A registration mode is set by the CPU 8, and when the user inputs the voice rABCJ, which means "door unlock", through the microphone 5, the voice is amplified by the amplifier 6 and supplied to the voice recognition LSI 7. A comparator built into the speech recognition LSI 7 converts the input speech into a digital signal. The digital signal thus formed is stored in the memory 15 for word registration. As described above, the voice is registered to the voice recognition LSI 7. This registered voice has two different roles: voiceprint data unique to the user and key data.

That is, in this embodiment, double protection is provided: protection by user-specific voiceprint data and protection by encrypted data.

The CPU 8 emits a signal containing a unique code associated with the voice input by the user through the microphone 5, that is, the data stored in the word registration memory 15.

The code output from the CPU 8 is modulated by an amplitude modulation circuit 9, and this modulated signal is amplified by an RF amplifier 10 and output from an antenna. FIG. 5 shows a circuit diagram of the receiving circuit and the controller. In the figure, the part surrounded by the two-dot chain line A shows the receiving circuit, which is similar to that shown in the first embodiment. The part surrounded by the two-dot chain line B shows the controller, and the code memory and voice registration memory in the first embodiment are not provided.
Only this point differs from the first embodiment.

Next, the operation will be explained.

The following explanation is about opening a car door.
It is assumed that the keyword "door unlock" is registered in the voice recognition LSI 7 in the user's own voice. First, C
The voice recognition LSI 7 is put into recognition mode by the PU 8.

Thereafter, the user manually speaks rABcJ, which means "door unlock", through the microphone 5 of the transmitter 1.

An analog signal based on the input voice is supplied to the voice recognition LSI 7 via the amplifier 6. This signal is converted into a digital signal by a comparator, and this converted digital signal is compared with the data stored in the word record memory 15 by pattern matching. In this case, the voice recognition LSI 7 recognizes the match with the data stored in the word registration memory 15 that instructs the operation ``open the door,'' and outputs the recognition result to the CPU 8. The CPU 8 outputs a signal containing a unique code "open the door", and this code signal is output to the receiver 3 via the amplitude modulation circuit 9 and the RF amplifier 10.

This signal is amplified by receiver 3 and modulated by amplitude modulation circuit 13.

When this code signal is input to the controller 4, a CPU (not shown) in the controller 4 issues a command to drive the relay 34, and the relay 34 is driven to unlock the door.

Note that even if a third party illegally obtains the transmitter 1 and inputs the voice "door unlock", the voice recognition LSI 7 will not be able to match the data stored in the word registration memory 15 because the code is different from rABCJ. The door will not be unlocked without confirming the match. On the other hand, even if a third party knows the code rABCJ and inputs the voice rABcJ, the voice prints will be different, so the voice recognition LSI 7 will not recognize the voice print match, and the CPU 8 will
From this point on, a signal containing a unique code for "open door" is not output, and the car door is not unlocked.

In the above embodiment, as shown in FIG. 3 or FIG. 5, the receiver 3 is provided with a local oscillator 13 and a frequency mixer 14, and a superheterodyne method is used in which the high frequency is converted into an intermediate frequency and then detected. However, a so-called direct detection method that directly detects high frequencies may also be used. Furthermore, the receiver 3 may be configured to alternately switch between the superheterodyne method and the direct detection method depending on the frequency band.

〔Effect of the invention〕

As described above, according to the present invention, in a remote control device for a vehicle, a voice registration memory is provided in the transmitter or the signal decoding means, and the voice input from the microphone of the transmitter is registered in advance in the voice registration memory. The system operates a drive mechanism that performs predetermined operations on the vehicle only when the voice unique to the user matches, so the security function is fully demonstrated and the unauthorized use by a third party is sufficiently prevented. I can figure it out.

[Brief explanation of the drawing]

FIG. 1 is an external view showing a remote control device for a vehicle according to an embodiment of the present invention, FIG. 2 is a circuit diagram of a transmitter according to a first embodiment of the present invention, and FIG. 3 is a first embodiment of the present invention. FIG. 2 is a circuit diagram of a receiver and a controller according to the invention. FIG. 4 is a circuit diagram of a transmitter according to a second embodiment of the present invention, FIG. 5 is a circuit diagram of a receiver and controller according to a second embodiment of the present invention, and FIG. 6 is a conventional remote control of a vehicle. FIG. 2 is an external view showing the device. 1... Transmitter, 3... Receiver, 4... Controller, 5... Microphone, 6.15-... Amplifier, F...
Voice recognition LSI, 8...-CPU, 9...Standard modulation circuit, 10°12...-RF amplifier, 11...Operation switch, 13...Oscillator, 14...Frequency mixer, 1
6... Input tuning circuit, 20... Voice recognition LSI, 2
DESCRIPTION OF SYMBOLS 1... Code setting circuit, 31... Microcomputer, 32... Voice registration memory, 33... Code memory, 34... Relay. Figure 1 Figure 2 Figure 3...&Itrh 4...
Konito O-La Figure 4 1 b Figure 6

Claims (3)

[Claims] (1) A transmission having a microphone for voice input serving as a key signal, means for converting the voice signal input from the microphone into a digital signal, and operation signal transmitting means for issuing a predetermined operation instruction signal to the vehicle. a receiving circuit mounted on the vehicle and receiving the signal from the transmitter; a signal decoding means also mounted on the vehicle and decoding the signal received by the receiving circuit; and this signal decoding means. a controller including a drive mechanism that performs a predetermined operation on the vehicle according to the decoding results obtained by the transmitter, and a voice serving as the key signal is registered in at least one of the transmitter or the signal decoding means. an operation signal that causes the drive mechanism to perform a predetermined operation on the vehicle from the signal decoding means only when a voice serving as a key signal inputted from the microphone matches that stored in the memory; A remote control device for a vehicle, characterized in that it outputs. (2) The remote control device for a motor vehicle according to claim 1, wherein the operation signal transmitting means provided in the transmitter is a plurality of operation switches. (3) The operation signal transmission means provided in the transmitter includes a word registration memory that registers the sounds of a plurality of operation commands, and a comparison determination means that compares the stored contents of this memory with the sounds input from the microphone. The first claim consisting of
A remote control device for a vehicle as described in Section 1.