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Ultrasonic material level meter

A level meter and ultrasonic technology, applied in the field of ultrasonic measuring devices, can solve problems such as low measurement accuracy, unstable measurement, failure to remove interference waves, etc., and achieve the effects of accurate echo data, noise suppression, and high transmission power

Inactive Publication Date: 2009-06-24
DANDONG DONGFANG MEASUREMENT&CONTROL TECHCO
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AI Technical Summary

Problems solved by technology

The current ultrasonic measurement method is based on echo measurement, but due to the simple identification of echo, the interference wave cannot be removed, resulting in low measurement accuracy or unstable measurement

Method used

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  • Ultrasonic material level meter
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Experimental program
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specific Embodiment approach

[0011] Specific embodiments: The structure and working principle of the ultrasonic level gauge will be described in detail in conjunction with the accompanying drawings.

[0012] An ultrasonic level gauge is composed of a host and a transducer, figure 1 It is the principle block diagram of the ultrasonic level meter of the present invention. The CUSS200 ultrasonic sensor of SENSE Company is housed in the transducer 4 shell, and its optimal operating frequency is 41kHz, and the detection range can reach 20 meters. The outer shell of the transducer is plexiglass , filled with polyester, the sound energy window is epoxy resin reinforced plexiglass, which is characterized by no interference, a commercially available temperature sensor is installed in the housing, and the central processing unit (CPU) 1 of the ultrasonic level gauge host is Philhps The product is equipped with ultrasonic receiving and sending timing control program, transmitting power control program, measurement d...

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Abstract

The invention provides an ultrasonic wave measuring device, wherein, a central processor of a mainframe drives a transducer to emit sound waves through an energy storage power automatic regulation circuit of an emitting unit and a matching circuit of a matching unit; and as the matching circuit ensures that the impedance output by the transducer is matched with the impedance output by the emitting unit, the maximum emissive power can be realized. An echo enters a front discharge circuit and a rear discharge circuit of an amplifying unit through the matching circuit, and then reaches a filter circuit of a filter unit and a wave shaping circuit of a wave shaping unit, and the wave shaping circuit of the wave shaping unit amplifies the echo signal in order to control noise. The delay sampling is adopted in the emission sampling subroutine, thereby solving the problem that the emitting part cannot take samples. The removal of part of the peak values, narrow pulses and DC components from an echo treatment subroutine can enable the echo data to be more accurate and stable. The treated digital signal is input by a D / A conversion chip of a D / A output unit into the central processor.

Description

technical field [0001] The invention relates to a device for measuring the position of materials in a container, in particular to an ultrasonic measuring device. Background technique [0002] The use of ultrasonic waves for level measurement uses the principle of sound wave reflection to avoid direct contact between the ultrasonic sensor and the medium to achieve non-contact measurement. Therefore, it has advantages in level measurement of solid bulk materials, viscous media, and solid-liquid mixed media. The current ultrasonic measurement method is based on echo measurement, but due to the simple identification of echo, the interference wave cannot be removed, resulting in low measurement accuracy or unstable measurement. Contents of the invention [0003] Aiming at the defects existing in the existing ultrasonic level measurement, the present invention proposes an ultrasonic level measuring device that adopts high-performance hardware circuit and digital signal acquisiti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F23/296G01S15/08
Inventor 郭衍斗崔祜林苏映新李云龙解庆昆杨洁亮
Owner DANDONG DONGFANG MEASUREMENT&CONTROL TECHCO
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