Force balance type transmitter of strain type displacement detecting element

A displacement detection and strain-type technology, which is used in the detection of fluid flow by measuring differential pressure, volume/mass flow generated by mechanical effects, instruments, etc., which can solve the trouble of transmitter adjustment, poor transmitter reliability and repeatability. , the amplifier circuit is complex and other problems, to achieve the effect of easy adjustment, strong adaptability and wide range

Inactive Publication Date: 2012-08-22
王可崇
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the output parameters of these two kinds of displacement detection components are inductance, the displacement detection amplifier must include a self-excited oscillation circuit, so the circuit of the amplifier is more complicated, and the adjustment of the transmitter is also more troublesome. sex is also poor

Method used

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  • Force balance type transmitter of strain type displacement detecting element
  • Force balance type transmitter of strain type displacement detecting element
  • Force balance type transmitter of strain type displacement detecting element

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Embodiment Construction

[0018] exist figure 2 In the embodiment of the invention, the present invention is used as a supporting transmitter of another patent (a dynamic throttling element flowmeter with a through hole in the middle). Although the throttling principle is still used in the measurement, the dynamic throttling element flowmeter of the through hole in the middle uses the Venturi tube, the nozzle and the orifice plate as the dynamic throttling element, and does not require a pressure guiding tube, so it is not easy to be blocked and can reduce construction costs. difficulty. Sealing gaskets (14) are added between the middle section (17) of the flow meter of the dynamic throttling element in the middle through hole, the front end cover (15) and the rear end cover (18), and they are sealed and fixedly connected to each other, forming a device for Rigid case connected to the fluid pipeline under test. In order to reduce the loss of flow resistance and prevent dirt from accumulating in the ...

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Abstract

The invention relates to a force balance type transmitter of a strain type displacement detecting element, belonging to the technical field of automatic detection. At present, during the detection process of flow rate and liquid level, the widely used displacement detecting element of the force balance type transmitter is inductance output, thus the circuit of the transmitter is more complex, andthe adjustment is more troublesome. According to the invention, the strain type displacement detecting element is used for the force balance type transmitter, and the displacement detecting element is resistance output, the circuit of the transmitter is more simple, the adjustment is easier, the whole structure of the transmitter is a negative feedback closed-loop system, and is composed of a lever system, a displacement detecting amplifier of a forward channel and an electromagnetic feedback device of a feedback channel; and when the amplification factor of the displacement detecting amplifier of the forward channel is greater enough, the whole property of the transmitter depends on the lever system with more stable link property and the electromagnetic feedback device of the feedback channel, and has nothing relationship with the stability of the displacement detecting amplifier, thus the cost performance of the force balance type transmitter of the strain type displacement detecting element is relatively higher.

Description

technical field [0001] The invention relates to a transmitter instrument in the technical field of automatic detection. Background technique [0002] At present, in the detection process of flow rate and liquid level, transmitters based on the principle of force balance are still widely used, and the typical representatives are DDZ-II and DDZ-III differential pressure transmitters. In this type of transmitter, when the measured pressure difference changes, the input force proportional to the measured pressure difference acts on the lever system to cause displacement, and the displacement detection amplifier of the transmitter converts the displacement into a corresponding The standard current signal, the current signal not only serves as the output signal of the transmitter, but also flows through the electromagnetic feedback device fixed on the lever to generate a feedback force proportional to the output current, so that both the feedback force and the input force occur c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B7/02G01F1/36
Inventor 王可崇
Owner 王可崇
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