Ultrasonic Velocity Measuring Device and Velocity Measuring Method
A speed measuring device, ultrasonic technology, applied in the direction of measuring device, measuring capacity, measuring flow/mass flow, etc., can solve the problem of measurement result error, and achieve the effect of overcoming the error
Active Publication Date: 2019-07-26
SHENZHEN RENERGY TECH
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Problems solved by technology
[0003] The ultrasonic speed measuring device and the speed measuring method provided by the embodiments of the present invention solve the defect in the prior art that the use of a fixed voltage compensation value will cause a large error in the measurement result
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[0032] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are used to explain the present invention, not to limit the present invention. In order to illustrate the technical solutions of the present invention, specific examples are used below to illustrate.
[0033] An embodiment of the present invention provides an ultrasonic velocity measuring device, such as figure 1 As shown, the ultrasonic speed measurement device includes a time-to-digital conversion module 101, an ultrasonic transducer 102, a compensation adjustment module 103, a comparator 104, and a pulse width detection module 105;
[0034] The output end of the time digital conversion module 101 is connected to the input end of the ultrasonic transducer 102, the output end of t...
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The invention belongs to the technical field of detection of ultrasonic flow, and provides an ultrasonic speed measuring device and a speed measuring method thereof. The ultrasonic speed measuring device comprises a time digital conversion module, an ultrasonic transducer, a compensation adjustment module, a comparator and a pulse width detecting module; and the comparator acquires a square signal according to a compensation signal and ultrasonic sine wave, and detects the square signal, and when signal attenuation rate of a first square wave is over high, a compensation adjusting signal is output to the compensation adjustment module, so that the compensation adjustment module outputs an adjusted compensation signal to filter the square signal and acquire a head wave signal; the arriving time of an ultrasonic signal can be accurately judged according to the head wave signal and the square signal at the rear of the head wave signal, errors caused by unreliable detection on head wave in ultrasonic metering are overcome, and meanwhile, the problems that detection on head wave is unreliable due to scaling of a probe, and flow velocity is calculated mistakenly can be solved effectively.
Description
technical field [0001] The invention belongs to the technical field of ultrasonic flow detection, and in particular relates to an ultrasonic velocity measuring device and a velocity measuring method thereof. Background technique [0002] At present, in the known ultrasonic measurement chips, the comparators used for ultrasonic echo recognition use a fixed voltage compensation value. In ultrasonic detection, identifying the first wave is a very important step. If a fixed voltage compensation value is used, In the case of external interference, misjudgment is likely. When the compensation value is too low, some noise signals may not be filtered, and the noise signal may be misjudged as an ultrasonic signal. When the compensation value is too high, the square wave of the ultrasonic signal may be filtered out. The first wave, resulting in deviation of the measurement results. When the water quality is too poor or the sensor probe is polluted or covered, such as when the sensor ...
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IPC IPC(8): G01F1/66G01F15/00
CPCG01F1/668G01F15/00
Inventor 赵琮汤江逊熊沁
Owner SHENZHEN RENERGY TECH