What is the difference between a flowmeter amplifier | turbine flowmeter and turbine flow sensor?

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What are the structural principles and classifications of air flow meters?

The working principle of a flow plate air flow meter (moving plate) is the interaction between the airflow torque M and the spring force N. Therefore, the flow plate works synchronously with the throttle valve. M> At N oclock, the board is open, there is more air and more fuel injection; 2. Working principle of hot wire air flow meter: Hot wire air flow sensors are mostly analog voltage signal sensors. When the engine is running and air flows through, heat is carried away. The resistance value of the hot wire RH decreases (PTC), and the resistance value of the cold wire RC increases (NTC), causing the bridge to lose balance and increase the bridge voltage. The amplifier then increases the compensation current IH flowing through the hot wire RH to restore the normal temperature difference (100 degrees) of the cold wire. The increase of current IH will cause an increase in the voltage drop of RA. By measuring the voltage drop at both ends of RA, the amount of air flowing through can be determined, and the ECU can determine the required fuel injection quantity for the air-fuel ratio. 3. The working principle of a thermal air flow meter is basically the same as that of a hot wire air flow meter, except that the heating element is changed from a hot wire to a hot wire. Heat is formed by fixing the heating metal onto a resin film. This structure does not directly bear the force generated by air flow, which increases the strength of the heating element and improves the reliability of the air flow sensor. The latest VNF series air flow meter from Heshunda has stable performance, good quality, and guaranteed reputation!! The air flow meter has

2. What is the difference between a turbine flowmeter and a turbine flow sensor? The turbine flowmeter consists of a turbine, bearings, preamplifier, and display instrument. The principle of a turbine flowmeter is to place a turbine in the center of a pipeline, supported by bearings at both ends. When the fluid passes through the pipeline, it impacts the turbine blades, generating a driving torque for the turbine, which overcomes the friction torque and fluid resistance torque to produce rotation. Within a certain flow range, for a certain viscosity of the fluid medium, the rotational angular velocity of the turbine is proportional to the fluid flow velocity. Therefore, the fluid flow velocity can be obtained from the rotational angular velocity of the turbine, and the fluid flow rate through the pipeline can be calculated. The rotational speed of the turbine is detected by a sensing coil installed outside the casing. When the turbine blades cut the magnetic field lines generated by the permanent magnetic steel inside the casing, it will cause changes in the magnetic flux in the sensing coil. The sensing coil will send the detected magnetic flux periodic change disturbance signal to the front end. Amplifier, amplifying signals Shaping generates a pulse signal proportional to the flow rate, which is sent to the unit conversion and flow accumulation circuit to obtain and display the accumulated flow value; At the same time, the pulse signal is also sent to the frequency current conversion circuit, which con

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