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[Chinese instrument network meter patent] creative limit, instrumentation invention. Today, we introduced a national invention-granting patent - a method for improving the anti-error wave of household ultrasonic water meters. The patent was applied by Liaoning Hangyu Xinglianlian Instrument Technology Co., Ltd., and was authorized to be announced on December 19, 2017.
Content Description
The invention relates to the field of accurate metering of a household ultrasonic meter in a meter, in particular to a method for improving the error-proof wave of an ultrasonic meter for household use.
Background of the invention
The signal quality of the ultrasonic transducer directly determines the metering performance of the entire watch. However, ultrasonic signals are very vulnerable to interference, such as water quality, external environment and so on. If the threshold setting is not reasonable, even if this measurement can be satisfied, a little interference will affect the wrong wave, leading to the failure of the entire measurement process.
Interference is ubiquitous, and an appropriate method of improving interference prevention and error prevention is crucial.
Summary of the Invention
The object of the present invention is to provide an improved method for preventing error waves of household ultrasonic water meters, which can more reasonably improve the accuracy of ultrasonic sampling in water.
The Figure is a functional block diagram of the present invention
The technical solution adopted by the present invention is a method for improving the error prevention wave of a household ultrasonic water meter, and the pulse width ratio λ=(CW-PW)/PW of the current measurement is calculated after each measurement is finished, and the wrong wave does not occur. In the case of fine-tuning the threshold. When λ < 0.5, it means that the threshold value is set to be high. When there is a slight disturbance, it will easily lead to less acquisition of a wave, so the threshold value should be reduced by 1mv. If λ>0.7, it means that the threshold is low. When there is a slight disturbance, it easily leads to more than one wave, so the threshold needs to be increased by 1mv.
The steps of the implementation method of the present invention are as follows: 1. The pulse width ratio λ of this measurement is calculated after each measurement is completed. 2. Compare whether λ is greater than 0.5, and if yes, skip to step 3. If the threshold is not decreased by 1mv, skip to step 1. 3. Compare whether λ is less than 0.7, and if yes, skip to step 4. If the threshold is not increased by 1mv, go to step 1. 4. End.
The advantages of the invention lie in that it effectively resists the wrong wave caused by the interference and has an effect on the metering accuracy of the meter.
For more information, please download the full specification of the patent.
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