JPH0348559B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicle door unlocking device that uses a speaker recognition circuit to unlock the door.

Conventionally, as this type of device, Japanese Patent Application Laid-Open No. 56-139372
There is a "keyless lock release device" which recognizes the voice of a specific speaker (owner or driver) and unlocks the door.

However, in the above-mentioned device, the circuit for performing the speaker recognition operation is constantly operating, and therefore there is a problem in that the energy of the on-vehicle battery is wasted.

In view of the above problems, the present invention provides a doorknob switch that detects the operation of a doorknob outside the vehicle, and when the doorknob switch detects the operation of the doorknob, it supplies power from the vehicle's battery to a speaker recognition circuit to identify the speaker. It is an object of the present invention to provide a vehicle door lock release device that can prevent the energy of a vehicle battery from being wasted by performing a recognition operation.

The present invention will be described below with reference to embodiments shown in the drawings. FIG. 1 is an overall configuration diagram showing one embodiment. In FIG. 1, 1 is an on-vehicle battery, and 2 is a doorknob switch that detects the operation of a doorknob outside the vehicle and closes when the doorknob is pulled. Reference numerals 3a and 3b are seat switches provided in the driver's seat and the passenger seat, respectively, which are closed when no one is seated in each seat.
4 is a keyboard that is installed in the vehicle and operated at the time of registration, and is equipped with five keys with registration numbers, and while any of the keys is pressed, the power from the vehicle battery 1 is used as a stabilized power source. In addition to supplying the signal to the circuit 6, a signal indicating the number of the key being operated is generated to the CPU 84. 5 and 6 are stabilizing power supply circuits that stabilize the power from the on-board battery 1; 7 is a microphone that is placed outside the vehicle near the door on the driver's seat side (the door may also be used) to input sounds from outside the vehicle; and 8 is a circuit from the microphone 5. This is a speaker recognition circuit that performs speaker recognition based on the voice pattern of input external sounds from the vehicle.

In this speaker recognition circuit 8, 81 is an amplifier;
82 is a bandpass filter (BPF) that removes high-frequency components and low-frequency components of the electrical signal via the amplifier 81, and 83 is an A/D converter that converts the analog signal from the BPF 82 into a digital signal. Reference numeral 84 denotes a CPU, which executes arithmetic processing for speaker recognition and arithmetic processing for unlocking the door, which will be described later. A clock 85 provides timing for audio sampling to the CPU 84, and also provides a clock signal to the A/D converter 83 for sequential A/D conversion. The clock signal is approximately 10 KHz, and the audio data (digital signal converted by the A/D converter 83) sampled at this frequency can sufficiently represent the input audio. A ROM 86 stores programs for the CPU 84 and the like. 87 is a RAM, which is used for temporary storage of audio data and the like. 88 is CMOS
Even when power is not supplied to each part of the speaker recognition circuit 8, power is always supplied via the stabilized power supply circuit 5, and the standard patterns of registered drivers etc. are always stored. are doing.

Reference numeral 9 denotes a door lock release unit which, upon receiving a door lock release command from the CPU 84, operates a solenoid type door lock release mechanism on the driver's side door. This door is equipped with a solenoid-type door lock mechanism for locking the door and a solenoid-type door lock release mechanism for unlocking the door.In addition to automatically locking or unlocking the door, it can also be locked or unlocked by manual operation. It is configured so that it can be released.

The operation of the above configuration will be explained.

If no one is currently sitting in the driver's seat or passenger seat and the seat switches 3a and 3b are closed, and the doorknob switch 2 is open because the doorknob is not being operated, the stabilized power supply circuit 6 is not supplied with power from the on-vehicle battery 1, and therefore the speaker recognition circuit 8 does not perform the speaker recognition operation.

After that, when the doorknob is operated from outside the vehicle to open the door, the doorknob switch 2 is closed, power is supplied from the vehicle battery 1 to the stabilized power supply circuit 6, and the stabilized voltage is applied to the speaker recognition circuit. 8
is supplied to As a result, the speaker recognition circuit 8
starts operating, the electric signal of the external sound inputted by the microphone 7 is amplified by the amplifier 81, and the BPF8 is
2, the high-frequency components are reduced and high-frequency components are removed, and the signals are sequentially converted into digital signals by an A/D converter 83 using a signal from a clock 85. Also,
The CPU 84 executes the arithmetic processing shown in FIG. 2 according to the program stored in the ROM 86. That is, the arithmetic processing is started at a start step 100, and the process proceeds to an initial setting step 101, where registers, counters, latches, etc. in the CPU 84 are set to initial states necessary for starting the arithmetic processing. Then, the process proceeds to registration determination step 102, where it is determined whether or not a signal is generated by pressing any key on the keyboard 4, that is, whether or not it is time for registration. Since no signal indicating the time of registration is generated from the keyboard 4, the determination becomes NO, and the process proceeds to recognition processing step 103.

In this recognition processing step 103, first, audio data is sequentially taken in from the A/D converter 83 at the timing of a signal from the clock 85, and a sound pattern based on the taken-in audio data and a predetermined
The degree of similarity between each of the standard patterns of the five registrants stored in the CMOS RAM 88 is calculated. Each of the calculated similarities is compared with a predetermined set value in the next registrant determination step 104, and if any one of them is greater than or equal to the set value, the person who input voice into the microphone 1 is the registrant. Assuming that you are one of them, the judgment will be YES.
Then, the process proceeds to command step 105, where a door lock release command is issued to the door lock release section 9, and the process proceeds to end step 106, where the arithmetic processing ends. Therefore, the door lock release section 9 is activated to release the door lock on the driver's seat side door.

Also, the determination in the registrant determination step 104 is
When the answer is NO, that is, when speaker recognition cannot be performed, the process proceeds directly to end step 106, so that the door lock is not released.

On the other hand, operate the doorknob and turn the doorknob switch 2.
When the switch is closed, if a person is sitting in the driver's or passenger's seat, the seat switch 3a or 3b is open, so power from the vehicle battery 1 is not supplied to the stabilized power supply circuit 6, and therefore The speaker recognition circuit 8 does not perform the speaker recognition operation. this is,
When someone is sitting in the driver's or passenger's seat, the door locks are often unlocked. Because you just have to get it.

Next, a case where a registrant's voice is newly registered or a case where a registrant's registered voice is changed will be explained. In this case, the registrant continues to press the key of his or her desired registration number on the keyboard 4, and inputs the registered voice during this time. That is, while the registration number key on the keyboard 4 is turned on, power from the vehicle battery 1 is supplied to the stabilized power supply circuit 6 via the keyboard 4, and the stabilized voltage from the stabilized power supply circuit 6 is supplied to the speaker. Recognition circuit 8
is supplied to Then, the CPU 84 enters the operating state, and through the start step 100, the initial setting step 101, and the registration determination step 102,
The process advances to registration processing step 107. In this registration processing step 107, audio data is input from the A/D converter 83, analyzed, and the result is registered in the CMOS RAM 88 as a standard pattern (registered in the registration area corresponding to the key number from the keyboard 4). do. Note that the voice to be registered may be any word, but it is necessary to input the voice intermittently for a predetermined period of time or more.

Note that in the above embodiment, speaker recognition is performed to recognize that the voice input to the microphone 7 is the voice of one of a number of registrants who have been registered in advance. It is also possible to use a device that identifies which person's voice is the voice of a large number of people, or a device that verifies whether the input voice is the voice of a specific person or not.

As described above, the present invention is provided with a doorknob switch that detects the operation of a doorknob outside the vehicle, and when the doorknob switch detects the operation of the doorknob, power from the in-vehicle battery is supplied to the speaker recognition circuit to recognize the speaker. Since the speaker recognition circuit can be activated when it is not needed, it is possible to prevent unnecessary consumption of the vehicle's battery, and the doorknob switch can be operated to input voice input. Therefore, if the door lock is released while operating the doorknob switch, the door can be opened by simply pulling the door.Furthermore, the speaker recognition operation is started by operating the doorknob switch, so that the door can be opened. By accurately knowing the start timing of the speaker recognition operation, there is an excellent effect that recognition errors in the speaker recognition circuit can be prevented as much as possible.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention;
FIG. 2 is a calculation flowchart showing the calculation processing of the CPU in FIG. 1...Battery, 2...Door switch, 4...
Keyboard, 5, 6... Stabilized power supply circuit, 7...
Microphone, 8...Speaker recognition circuit.

Claims (1)

[Scope of Claims] 1. A microphone installed at the door or near the door to input sounds from outside the vehicle, and a registrant's voice stored in advance as a standard pattern, and a sound pattern of sounds outside the vehicle input from the microphone and the standard pattern. A door lock release unit for a vehicle includes a speaker recognition circuit that recognizes a speaker, and a door lock release unit that releases the door lock when the speaker is recognized by the speaker recognition operation by the speaker recognition circuit. The device includes a doorknob switch that detects a door opening operation of a doorknob provided on the outside of the vehicle in order to open the door, and a power supply from an in-vehicle battery when the doorknob switch detects a door opening operation of the doorknob. and a power supply circuit that supplies power to the speaker recognition circuit to cause the speaker recognition circuit to perform a speaker recognition operation.