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Ultrasonic sensor driving apparatus for improving temperature reliability

A driving device, ultrasonic technology, applied in the direction of measuring device, re-radiation of sound waves, instruments, etc., can solve the problems of increasing production cost, influence of temperature detection accuracy, etc., and achieve the effect of improving temperature reliability and reducing production cost.

Pending Publication Date: 2020-05-08
SENSOR TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has the problem that the detection accuracy of the temperature is affected by the surrounding environment, and an additional element for detecting the temperature is required, which increases the production cost

Method used

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  • Ultrasonic sensor driving apparatus for improving temperature reliability
  • Ultrasonic sensor driving apparatus for improving temperature reliability
  • Ultrasonic sensor driving apparatus for improving temperature reliability

Examples

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Embodiment Construction

[0019] An ultrasonic sensor drive device according to the present invention includes an ultrasonic sensor for transmitting and receiving ultrasonic signals, a driving section for driving the ultrasonic sensor, and a control section for controlling the driving section to drive the ultrasonic sensor, wherein the control is performed in the following manner The drive unit drives the ultrasonic sensor to alternately output two or more resonant frequencies that vary with temperature.

[0020] Since the present invention can be modified in various ways and can have various embodiments, specific embodiments will be illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, and it should be understood to include all changes, equivalents and substitutions included within the idea and technical scope of the present invention.

[0021] The terminology used herein is for describing particular embodiments only ...

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Abstract

An ultrasonic sensor driving apparatus according to the present invention comprises: an ultrasonic sensor for transmitting and receiving an ultrasonic signal; a driving unit for driving the ultrasonicsensor; and a control unit for controlling the driving unit to drive the ultrasonic sensor, wherein the driving unit is controlled so that the ultrasonic sensor is driven in such a manner that two ormore of resonance frequencies of the ultrasonic sensor which vary depending on temperature are alternately output. According to the present invention, in driving the ultrasonic sensor, uniform sensitivity characteristics appear over the entire temperature range from a low temperature to a high temperature, so that reliability according to temperature may be improved. Accordingly, it is possible to achieve uniform performance over the entire temperature range, irrespective of the accuracy of a temperature measurement method.

Description

technical field [0001] The present invention relates to an ultrasonic sensor, and more particularly to an ultrasonic sensor module that senses objects around a vehicle and informs a driver when the vehicle is running or parking. In particular, the invention relates to responding to the temperature-dependent frequency characteristics of ultrasonic sensors. Background technique [0002] Generally, an ultrasonic sensor is used to sense a distance, and various systems using the ultrasonic sensor to sense a distance, such as a parking guidance system, have been proposed. [0003] The parking guidance system using the ultrasonic sensor uses the following method: the ultrasonic sensor installed on the upper end of the vehicle emits and receives the reflected wave, measures the delay time of the received reflected wave and converts it into a distance, and judges the distance between the ultrasonic sensor and the distance based on the converted distance value. Whether there is a veh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/52G01S15/931G01S15/93
CPCG01S7/52G01S15/93G01S7/52006G01S15/931G01S2015/932
Inventor 李正旭金洪国郑俊勇李亨哲
Owner SENSOR TECH LTD
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