Flow detection technology of vortex flow sensor The flow measurement of vortex flow sensor is not affected by fluid composition, density, pressure and temperature, and is widely used in pipeline flow measurement. The difference between the vortex flow sensor and the traditional flow sensor is that the shape of the vortex generator of the traditional vortex flow sensor is determined based on the linearity of the frequency and the flow velocity, ignoring the influence of the shape of the body on the frequency signal strength, resulting in the occurrence of tradition. The frequency signal output by the body shape vortex flow sensor at low flow rates is not sufficient to be detected, affecting the application of the vortex flow sensor at low flow rates. The large-scale application of the digital vortex flow sensor makes the linearity requirement for frequency and flow rate no longer important. The strength of the vortex signal determines the application of the vortex flow sensor at low flow rates. Improving the shape of the vortex generator of the vortex flow sensor plays an important role in improving the application value of the vortex flow sensor at low flow rates. The application of vortex flow sensor detection technology in industrial production, people's understanding of nature, depends to a large extent on detection technology and vortex flow sensor. Whether it is daily life, or engineering, medicine, scientific experiments and other departments, there is a close relationship with testing. For example, in industrial production, in order to correctly guide production operations, ensure production safety, ensure product quality, and automate production processes, an essential task is to accurately and timely detect relevant parameters in the production process. For example, in the development of science and technology, new inventions and breakthroughs are based on experimental testing. In 1916, the general theory of relativity proposed by Einstein did not develop rapidly in the past 50 years because it did not have the test conditions for verification. Later, the development of astronomy and many precise detection techniques successfully verified this theory, and the general theory of relativity was re-emphasized and developed. This fact illustrates the close relationship between science and detection. The research and production of various new equipment and new processes are closely related to the detection of various parameters. With the continuous development of industrial production, many new requirements have been put forward for detection technology and vortex flow sensor, and the emergence of new detection technology and instrument further promotes the development of science and technology. Therefore, detection technology and vortex flow Sensors are an important indicator of the level of modern science and technology. . The vortex flow sensor has good resistance to dirt. Since the probe is externally mounted, the structure of the vortex generator is simplified. There is no hole in the flow part of the vortex flow sensor, there is no gap sensitive to impurities, and it will not affect the normal operation of the instrument due to medium fouling, crystallization or impurity deposition in the medium. Since the probe in the vortex flow sensor is a force sensitive component, even if there is media fouling or impurity deposition on the probe, it will not affect the function of the probe. The probe structure of the vortex flow sensor constitutes a piezoelectric crystal in the vortex flow sensor which is essentially two pieces, one for anti-vibration interference and one for detection. The probe lead in the vortex flow sensor is the two leads of the test piece. The probe housing is inserted into the wall of the vortex body and fixed to the wall of the vortex body through a fixing flange. The probe in the vortex flow sensor is suitable for the temperature vortex flow sensor. The probe can work normally below 300 °C, and the maximum resistance is 320 °C. If the temperature is higher, the sealed porcelain will be destroyed, the performance of the probe will be degraded, and even the probe of the vortex flow sensor will be damaged. Detection of the probe in the vortex flow sensor 1. Visual inspection of the probe in the vortex flow sensor should pay attention to check whether the shell of the vortex flow sensor is damaged, whether the probe lead of the vortex flow sensor is loose, whether the sealed porcelain is due to The temperature is too high and it turns brown or broken from white. In one of the above cases, the probe in the vortex flow sensor may be damaged. 2. Use a multimeter to check whether the vortex flow sensor is available. Use the multimeter "&TImes; 10k" file to check the two leads of the probe in the vortex flow sensor. It should be infinite. If there is resistance, the probe performance will decrease; if it is in the tens of kilo ohms Below, the probe is damaged. 3. Use the ultra-low frequency oscilloscope to check the vortex flow sensor with the object tapping the probe head in the vortex flow sensor. At this time, the oscilloscope screen should have an irregular sine wave, indicating that the probe of the vortex flow sensor is intact. A graphic appears indicating that the probe is damaged. 4. Use the overall continuous school method to check whether the vortex flow sensor is normal. Use the object to tap the probe head in the vortex flow sensor. At this time, the secondary meter instantaneous flow meter indication will fluctuate, flow-meter.com.cn The probe in the vortex flow sensor is intact, but this calibration method should be carried out under normal conditions of the amplifier board and the secondary meter, otherwise it is invalid. After the probe in the vortex flow sensor is detected as damaged, it cannot be repaired. The vortex flow sensor is an important part of the vortex flowmeter. It is a flow sensor sensitive to the distortion of the flow velocity of the pipeline, the swirling flow and the flow artery, so it can be installed indoors and outdoors. Due to the harsh installation environment of the vortex flow sensor, it is very important in the factory inspection, and the main components of the vortex flow sensor are not negligible.
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