Ultrasonic liquid level measuring device and method for manhole
A liquid level measurement device, ultrasonic technology, applied in the field of measurement, can solve problems such as inability to measure measured values, errors, etc., achieve the effect of solving EMI problems, reducing partial voltage, and accurately measuring the liquid level of inspection wells
Active Publication Date: 2021-12-21
坤御(北京)技术有限公司
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Problems solved by technology
[0003] The purpose of the present invention is to provide a special ultrasonic liquid level measuring device and method for inspection wells, which can solve the EMI problem, reduce hardware costs, and overcome problems such as inability to measure and measurement value errors caused by civil structures in the inspection well.
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[0027] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so as to fully understand and implement the process of how to apply technical means to solve technical problems and achieve technical effects in the present invention. It should be noted that, as long as there is no conflict, each embodiment and each feature of each embodiment in the present invention can be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.
[0028] In addition, the steps shown in the flow diagrams of the figures may be performed in a computer system, such as a set of computer-executable instructions, and, although a logical order is shown in the flow diagrams, in some cases, the sequence may be different. The steps shown or described are performed in the order herein.
[0029] Please refer to figure 1 As shown, the special ultrasonic liquid lev...
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An ultrasonic liquid level measuring device and method for manholes, specifically comprising a control module, an ultrasonic probe, a limiter circuit, a passive filter circuit, a multi-stage band-pass filter circuit, and a power detection circuit; The frequency signal corresponding to the frequency of the probe; the measurement result is calculated according to the effective detection signal; the ultrasonic probe is used to transmit the ultrasonic detection signal of the corresponding frequency to the measured area according to the amplified frequency signal, and receive the feedback ultrasonic feedback signal; the limiter circuit is used for Limit the ultrasonic feedback signal; the passive filter circuit is used to filter the source noise in the ultrasonic feedback signal; the multi-stage bandpass filter circuit is used to amplify the ultrasonic feedback signal with a predetermined frequency after filtering the source noise Noise filtering processing: the power detection circuit is used to analyze the ultrasonic feedback signal amplified and filtered by the multi-stage band-pass filter circuit to obtain an effective detection signal.
Description
technical field [0001] The invention relates to the field of measurement, in particular to a special ultrasonic liquid level measuring device and method for a manhole. Background technique [0002] At present, ultrasonic level gauges are generally used for liquid level measurement in inspection wells, and ultrasonic level meters are generally used in solid, stable surfaces, and stable environments. There are many problems in the application of liquid level measurement in inspection wells. Specifically, the control center generally uses microcontrollers such as single-chip microcomputers or DSPs as the core, and circuits such as related drivers and filters are added to the periphery. Power management generally uses LDO or DCDC. The pulse amplification circuit often adopts a transformer with a higher transformation ratio or transforms it into a high-voltage source (generally nearly 1K volts) through a flyback converter to achieve pulse amplification through a high-voltage MOS...
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IPC IPC(8): G01F23/296G01S15/10G01S7/527G01S7/539
CPCG01F23/2962G01S15/10G01S7/539G01S7/527
Inventor 孙宝磊张志辉符啸宇王志久梁庆阳李帅
Owner 坤御(北京)技术有限公司