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technical article
Explain the knowledge of vortex flowmeters
2011-12-20 17:25:16


采用微功耗高新技术,采用锂电池供电可不间断运行一年以上,节省了电缆和显示 For the convenience of use, the battery-powered local display type vortex flowmeter adopts micro power consumption high-tech. It can be operated continuously for more than one year with lithium battery power supply, saving cables and display

Instrument procurement and installation costs,

Can display instantaneous flow rate, accumulated flow rate, etc. The temperature-compensated integrated vortex flowmeter also has a temperature sensor, which can directly measure the temperature of the saturated steam and calculate the pressure to display the saturation.

And steam mass flow.

Temperature and pressure compensation integrated type with temperature and pressure sensors for gas flow measurement can directly measure the temperature and pressure of the gas medium, thereby displaying the standard volume flow of the gas

它的主要特点有以下几点: Its main characteristics are as follows:


1. Simple installation and maintenance.

2. Simple and solid structure, no moving parts, high reliability and long-term operation.

3. It has a wide range of applications, and the flow of steam, gas, and liquid can be measured.

4. Wide measuring range, range ratio can reach 1:10.

5. The pressure loss is small, the operating cost is low, and it is more energy-saving.

6, the detection sensor does not directly contact the measured medium, stable performance and long life.


7, the output is a pulse signal proportional to the flow rate, no zero drift, high accuracy.

8. Within a certain Reynolds number range, the output signal frequency is not affected by the fluid physical properties and composition changes. The meter coefficient is only related to the shape and size of the vortex generator.

There is no need to compensate when measuring fluid volume flow, and it is generally not necessary to recalibrate the meter coefficient after changing accessories.


尽可能测量低流速、小流量,必须提高信噪比,即尽量提高有效流量信号的幅值而降低机械振动干扰信号的幅值。 In order for the vortex flowmeter to measure as low a flow velocity and a small flow as possible, the signal-to-noise ratio must be increased, that is, the amplitude of the effective flow signal should be increased as much as possible to reduce the amplitude of the mechanical vibration interference signal.

Improving the structure shape of the fluid-impedance, so that the sensor can better receive the pulsating pressure of the vortex, and the effective signal amplitude can be increased. But a more effective method is to encapsulate the corresponding side of the vortex generator.

Two piezoelectric crystals, that is, a differential piezoelectric sensor and a differential amplifier circuit