JPS62280467A - Ultrasonic lock - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to an ultrasonic lock used as a door lock for a general household, a door lock for a vehicle, etc. The present invention relates to an ultrasonic lock that locks and unlocks the lock by transmitting a locking/unlocking signal using ultrasonic waves and having the lock receive this signal.

[Prior art and problems to be solved by the invention] Conventionally,
Some locks that use ultrasonic waves are designed to generate a lock/unlock signal based on the presence or absence of an ultrasonic signal corresponding to a predetermined code or a difference in frequency.

This conventional device has a problem in that the more keys are incorrect, the longer it takes to output data, resulting in a time lag between locking and unlocking.

Further, in the determination based on the presence or absence of ultrasonic waves, there is a very high possibility that erroneous recognition will occur. Moreover, changing the lock/unlock signal data,
There were drawbacks such as the troublesome registration of a master key that combines multiple signals.

Therefore, the present invention is a super system that can create many different key codes without prolonging the data output time, has less possibility of misrecognition, and can easily change data, register master keys, etc. The aim is to provide a sonic lock.

[Means for solving problems]

In order to solve the above problems, the ultrasonic lock made according to the present invention includes a portable ultrasonic transmitter that generates ultrasonic waves, and data that receives the ultrasonic waves from the ultrasonic transmitter and stores them in advance. In comparison, the ultrasonic receiver is equipped with an ultrasonic receiver that generates a lock activation signal when the two match, and an electric lock that is activated by the lock activation signal generated by the ultrasonic receiver, and the ultrasonic transmitter is emitted by a human. The ultrasonic receiver has a data memory for storing data created based on audio, and a means for generating ultrasonic waves based on the data stored in the data memory, and the ultrasonic receiver receives the ultrasonic waves generated by the ultrasonic transmitter. It is characterized by having a data memory for storing data created based on sound waves, and means for generating a lock activation signal by comparing the data stored in the data memory with the ultrasound from the ultrasound transmitter. do.

Data is registered by human voice, converted to the ultrasonic range and output, and the lock activation signal is generated by recognizing this, making it easy to register and change data. Moreover, it is possible to form countless codes with different keys without malfunctioning or increasing data output time.

【Example〕

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a block diagram showing an embodiment of the ultrasonic lock according to the present invention, which consists of an ultrasonic transmitter I, an ultrasonic receiver (2), and an electric lock (2).

The ultrasonic transmitter ■ is made into a small card-like or pencil-like shape so that it can be carried in a pocket, etc. It transmits a microphone 1 as an audio-to-electrical conversion means and an audio signal from the microphone 1. an analog-digital (A-D) converter 3 that converts the audio signal amplified by the amplifier 2 into a digital signal, and an audio signal digitized by the AD converter 3. It has a controller 4 that is manually operated. The controller 4 stores the digitized audio signal inputted when the registration switch 5 is turned on in a data memory 6, and reads and outputs the data stored in the data memory 6 by turning on the output switch 7.

The ultrasonic transmitter I also includes a digital-to-analog (D-A) converter 8 for converting the data read from the data memory 6 through the controller 4 into an analog audio signal;
- It consists of an amplifier 9 that amplifies the data converted into analog by the A converter 8, and a speaker 10 that emits sound based on the data amplified by the amplifier 9.

The controller 4 is configured to perform 1/N (approximately 1
Data is read from the data memory 6 at a cycle of 1/10 to 1/30) and is supplied to the DA converter 8 to be converted into an analog signal. As a result, D-A
The analogized data obtained at the output of the converter 8 is
The signal has a frequency N times that of the audio signal at the time of registration, that is, an ultrasonic signal. Therefore, the speaker 10 is configured with an ultrasonic speaker, and the sound emitted from the speaker 10 is performed by ultrasonic waves far exceeding the audible frequency. .

The ultrasonic receiver (■) includes an ultrasonic microphone 21 and an amplifier 2 that amplifies the signal from the ultrasonic microphone 21.
2, an A-D converter 23 that converts the signal amplified by the amplifier 22 into a digital signal, and a controller 24 to which the signal digitized by the A-D converter 23 is input.
and has.

When the registration switch 25 is turned on, the controller 24 manually inputs the signal output from the ultrasonic transmitter I and digitized by the A-D converter 23, and stores it in the data memory 26. After the data has been stored in the data memory 26, the recognition switch 27 is turned on to complete the data registration. The controller 24 then performs pattern matching between the digitized signal input through the ultrasonic microphone 21 and the data stored in the data memory 26, and when the two match, it locks the electric lock. Outputs unlock signal.

In the above configuration, the registration switch 5 of the ultrasonic transmitter (■) is now turned on and sound is emitted toward the microphone 1. As a result, the microphone 1 outputs an audio signal as shown in FIG. 2(a). Suppose that

This audio signal is amplified by an amplifier 3, digitized by an A-D converter 3, inputted to a controller 4, and stored in a data memory 6 by the controller 4. By turning on the output switch 7, the stored data is read out from the data memory 6 at a cycle that is 1/N times the sampling cycle in the A-D converter 3 at the time of registration, and as a result, the second It is output in the form of ultrasonic waves as shown in Figure 3). This cannot be heard by human ears.

At this time, when the registration switch 25 on the ultrasonic receiver ■ side is turned on and the ultrasonic waves output from the ultrasonic transmitter I are supplied to the ultrasonic microphone 21, the controller 24
The converter 23 receives the digitized signal and stores it in the data memory 26.

Thereafter, when the recognition switch 27 is turned on, pattern matching is performed between the signal input from the ultrasonic microphone 21 and the data stored in the data memory 26 in the controller 24.

Pattern matching does not require complicated processing as in normal speech recognition, and is performed, for example, as shown in Figure 3 fa) to (dl. Now, when the registered data is as shown in Figure 3 (al), If the distance between the ultrasonic speaker 10 and the ultrasonic microphone 21 is long and the amplitude of the input data is small as shown in Fig. 3 To), the data is multiplied by M (M>1), and vice versa The sound wave microphone 21 is nearby, and the third
If the amplitude of the input data is large as shown in figure (C),
The data is multiplied by M (M x 1) to make it substantially the same as the registered data as shown in FIG. 3 (1d), and then linear matching is simply performed between the registered data and the input data.

Linear matching results - electric lock only when determined to be a failure ■
Outputs an unlock signal to.

In the above-described embodiment, only the unlocking signal is generated, but depending on the capacity of the data memory, the locking signal etc. can be generated in the same way. However, in this case, it is necessary to provide each of the ultrasonic transmitter and receiver with a switch for registration, output, etc. corresponding to locking/unlocking.

〔Effect of the invention〕

As explained above, according to the present invention, since human voice is converted into ultrasonic waves, registration and re-registration can be easily performed. Furthermore, human voice signals are extremely complex and difficult to forge, and no two keys can be the same, resulting in an infinite number of key differences.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an embodiment of the ultrasonic lock according to the present invention, Fig. 2 is a signal waveform diagram for explaining the operation at the time of data registration, and Fig. 3 is a signal processing diagram for pattern matching. It is a signal waveform diagram for explanation. ■...Ultrasonic transmitter, ■...Ultrasonic receiver, ■...
- Electric lock, 4... Controller, 6... Data memory, 10... Ultrasonic speaker, 21 River Ultrasonic Microphone, 24... Controller, 26... Data memory.

Claims (1)

[Claims] A portable ultrasonic transmitter that generates ultrasonic waves; the ultrasonic waves from the ultrasonic transmitter are received, compared with pre-stored data, and if the two match, a lock activation signal is generated. an electric lock that is activated by a lock activation signal generated by the ultrasonic receiver; and a means for generating ultrasonic waves based on the data stored in the data memory, and the ultrasonic receiver stores data generated based on the ultrasonic waves generated by the ultrasonic transmitter. memory and
An ultrasonic lock characterized by comprising means for generating a lock activation signal by comparing data stored in the data memory and ultrasonic waves from the ultrasonic transmitter.