Ultrasonic ranging excitation signal adjusting system and method for reducing blind area

A technology of excitation signal and adjustment method, which is applied to radio wave measurement systems, instruments, etc., to achieve good results and reduce blind spots

Active Publication Date: 2018-09-11
HUBEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The distance that the ultrasonic wave propagates in the medium during the period when the aftershock wave decays to no effect is the blind area of ​​measurement. The blind area of ​​the existing transceiver integrated ultrasonic ranging system is about 30cm

Method used

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  • Ultrasonic ranging excitation signal adjusting system and method for reducing blind area
  • Ultrasonic ranging excitation signal adjusting system and method for reducing blind area
  • Ultrasonic ranging excitation signal adjusting system and method for reducing blind area

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Embodiment Construction

[0017] The present disclosure will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] like figure 1 As shown, the ultrasonic ranging system includes a transceiver integrated ultrasonic transducer and a main control module. The transceiver integrated ultrasonic transducer includes a transceiver integrated ultrasonic probe, an ultrasonic transmitting module, an ultrasonic receiving module and a signal amplification module. The main control module includes A single-chip microcomputer system, an excitation signal adjustment module and a signal processing module. The single-chip system controls the excitation signal adjustment module to send the excitation signal sequence SS with a specific composition structure through the ultrasonic transmitting module, drives the transceiver integrated ultrasonic probe to transmit ultrasonic waves, and receives the after-vibration signal through the ultrasonic receiving module to...

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Abstract

The invention discloses an ultrasonic ranging excitation signal adjusting system and method for reducing blind areas. The system includes an excitation signal adjustment module, which is used for adjusting components of excitation signals, having a specific constituent structure, that are transmitted to a transceiving integrated ultrasonic transducer, wherein the excitation signals with the specific structure in terms of a signal sequence SS are a forward periodic signal which lasts n1 periods T, a DC signal which lasts T / 2 and a reverse periodic signal which lasts n2 periods T. According to the invention, the attenuation speed of residual oscillation waves on the transceiving integrated ultrasonic transducer is accelerated by adjusting the components of the excitation signals having a unique constituent structure, thereby reducing blind areas during ultrasonic ranging. The scheme can be easily implemented by software and hardware, and the effect is great.

Description

technical field [0001] The invention belongs to the field of ultrasonic ranging, and in particular relates to an ultrasonic ranging excitation signal adjustment system and method for reducing blind spots. Background technique [0002] Ultrasound propagates along a straight line in an elastic medium, has good directionality, slow energy consumption, and can travel a long distance. Reflection and refraction will occur at the interface of the medium, and the propagation speed in the same medium is basically constant. Ultrasound is not sensitive to color and illumination, and can be used to identify transparent and poorly reflective objects (such as glass, polished objects); it is not sensitive to external light and electromagnetic fields, and can be used in harsh environments such as darkness, dust, smoke, and strong electromagnetic interference. ; In addition, the ultrasonic transducer has simple structure, small size, low cost, low technical difficulty, simple and reliable in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/524
CPCG01S7/524
Inventor 周向东张天王选择董正琼杨练根翟中生
Owner HUBEI UNIV OF TECH
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