Ultrasonic transducer applied to water meter

Abstract

The invention relates to the technical field of ultrasonic transducers, and discloses an ultrasonic transducer applied to a water meter, which comprises an ultrasonic transducer shell, an adjusting screw, a sealing rubber ring, a pressurizing block, a sensor unit and a shielding cable, the adjusting screw is located at the upper end of the transducer shell, the adjusting screw is connected with the transducer shell through the sealing rubber ring, the pressurizing block, the backing layer, the piezoelectric ceramic and the connecting layer are sequentially arranged in the transducer shell from top to bottom, and the shielding cable penetrates through the adjusting screw, the pressurizing block and the positive and negative electrodes welded to the piezoelectric ceramic. The connecting layer is additionally arranged in the sensor, the pressurizing block is used for replacing traditional glue to adhere piezoelectric ceramics, the glue curing waiting problem is solved, the assembling efficiency is improved, the problem that the performance of the transducer is degraded due to glue degradation caused by long-time work is avoided, the metering precision is guaranteed, meanwhile, the service life of the transducer is prolonged, and the cost is reduced. The resonant frequency of the transducers is adjusted through the adjusting screws, and pairing of any transducers in the same batch is achieved.

Description

technical field [0001] The invention relates to the technical field of ultrasonic transducers, in particular to an ultrasonic transducer applied to water meters. Background technique [0002] The stepped water price policy implemented by the country has made traditional mechanical water meters unable to meet people's needs for water flow measurement. When promoting the transformation of "one household, one meter", new metering forms with higher accuracy and more complete functions are required to enter in people's lives. Ultrasonic water meters with more functions and better performance than traditional mechanical water meters were born, and ultrasonic transducers are the core components of ultrasonic water meters. [0003] In the current common ultrasonic transducers, the piezoelectric ceramics and the ultrasonic transducer shell are connected by glue. It is necessary to wait for the glue to fully cure before installing other structural components of the ultrasonic transdu...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies and defects of the prior art, the present invention provides an ultrasonic transducer applied to a water meter. By adding a connection layer in the sensor unit and using a pressure block to replace the traditional glue to bond piezoelectric ceramics, the solution is solved. It solves the problem of waiting for the glue to cure, and avoids the problem of the performance of the ultrasonic transducer caused by the degradation of the glue performance caused by long-term work.

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