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Method for operating ultrasonic wave sensor

A technology of an ultrasonic sensor and an operation method, which is applied in the re-radiation of sound waves, instruments, radio wave measurement systems, etc., can solve problems such as judgment errors and abnormal ranging functions.

Inactive Publication Date: 2011-05-25
LITE ON TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, when measuring the distance, the crosstalk phenomenon will make the distance measurement function abnormal or the judgment error

Method used

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  • Method for operating ultrasonic wave sensor
  • Method for operating ultrasonic wave sensor
  • Method for operating ultrasonic wave sensor

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Embodiment Construction

[0031] In the embodiment of the present invention, under proper conditions, the crosstalk phenomenon can be used as a function switch. That is, the crosstalk phenomenon can be used as a basis for function switching. Therefore, it is not necessary to completely eliminate the crosstalk phenomenon. Even, through a proper logic judgment process, more control functions can be obtained by using the crosstalk phenomenon. In the embodiment of the present invention, no additional hardware architecture is required, and the usage of some hardware components can even be reduced.

[0032] For the convenience of explanation, in this embodiment, the application of two ultrasonic sensors is used as an example for illustration, but it should be understood that the present invention is not limited thereto, that is, other embodiments of the present invention can be applied to multiple ultrasonic sensors Condition.

[0033] figure 1 A functional block diagram of an electronic device according...

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Abstract

The invention discloses a method for operating an ultrasonic wave sensor, which is applied to the ultrasonic wave sensor. The method comprises the following steps of: sending an ultrasonic wave; receiving a crosstalk signal in a crosstalk measurement window; judging whether the crosstalk signal is greater than a crosstalk critical value; and triggering crosstalk application if the crosstalk signal is smaller than the crosstalk critical value. In the method, the crosstalk phenomenon is applied to control application, and more control functions are developed on the premise of not changing a hardware architecture.

Description

technical field [0001] The invention relates to an ultrasonic sensor, in particular to an operation method of the ultrasonic sensor. Background technique [0002] An ultrasonic sensor is a sensor that uses the emission and reception of ultrasonic waves to measure physical quantities such as position, speed, and distance. In a device that generally uses an ultrasonic sensor, the microprocessor will first generate a driving voltage / current signal according to the frequency and magnitude of the ultrasonic wave to be emitted to drive the transmitter to emit the required ultrasonic signal; then , the receiver will receive the reflected ultrasonic signal, and the microprocessor will convert the received reflected ultrasonic signal into a voltage / current signal. Generally, ultrasonic sensors have the functions of receiving and transmitting signals. [0003] In the application of ultrasonic sensors, there is a way to use two or more ultrasonic sensors for detection at the same tim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S15/06G01S15/08H05B37/02
CPCG01S15/876H03K17/945G01S15/10H03K2217/94005G01S15/003G01S15/04
Inventor 廖元宏胡肇文陈子南
Owner LITE ON TECH CORP
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