Ultrasonic water meter detection

　　The traditional liquid flow standard devices are mostly standard devices based on the mass method and the volume method. There are two ways to generate the flow source. One is the high-level water tower, which has a stable flow rate. Generally, the construction cost of voltage stabilizer equipment is high. The other is to rely on the water pump to provide flow, but the flow is pulsating, the flow stability is poor, and the flow point adjustment is not accurate. However, with the rapid development of flow measurement and testing technology, These devices have been unable to meet the requirements very well. In order to meet the requirements of liquid flow meter verification, calibration, factory inspection and the growing trend of new flow meter production, our company designs and manufactures active Piston liquid flow standard device, the standard device has a unique design, and its basic working principle is to compare the volume flow of the fluid discharged by the piston with the volume flow of the flowmeter under test within a certain time interval, and the piston discharge The volume of fluid is obtained by multiplying the cross-sectional area of ​​the piston cylinder and the displacement of the piston. Driven by the servo motor, the disturbance to the liquid flow is reduced, and it has many advantages such as stability and reliability, good repeatability, high degree of automation, and easy operation. It avoids the shortcomings of the start-stop effect or the commutator effect of the traditional liquid flow standard device, which is beneficial to improve the measurement uncertainty level. The device also has the characteristics of self-contained, compact structure, high efficiency and energy saving. No need to build a pool, no special structural requirements for buildings, very suitable for production testing and product development testing of small flow metering instruments。