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Resistance strain type weighing sensor simulator

A technology of resistance strain type and weighing sensor, which is applied in the direction of weighing equipment using elastically deformable parts, weighing equipment testing/calibration, instruments, etc., can solve problems such as inability to generate high-precision analog signals, and achieve benefits for follow-up processing, fine tuning, output impedance reduction effects

Inactive Publication Date: 2013-06-26
BEIJING WUZI UNIVERSITY
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  • Abstract
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Problems solved by technology

However, the accuracy of the output signal of this circuit depends entirely on the moving resolution of the variable resistor, and cannot generate high-precision analog signals.

Method used

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Embodiment Construction

[0014] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0015] Such as figure 1 As shown, it is a structural schematic diagram of a resistance strain type load cell simulator according to an embodiment of the present invention. The resistance strain type load cell simulator includes: a Wheatstone full-bridge bridge circuit and a cross resistance network , wherein: each bridge arm of the Wheatstone full-bridge bridge circuit is respectively connected with a fixed resistor, followed by resistors R1, R2, R4, R3, at le...

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Abstract

The invention provides a resistance strain type weighing sensor simulator which comprises a Wheatstone full bridge type bridge circuit and a crossed resistance network, wherein bridge arms of the Wheatstone full bridge type bridge circuit are internally and respectively connected with fixed resistors R1, R2, R4 and R3 in sequence; the fixed resistor R4 of at least one bridge arm is connected with an adjustable resistor W1 in series; one arm of the crossed resistance network is connected with two resistors R7 and R8 in sequence; two ends of the arm are voltage input ends and respectively connected between the R1 and the R3 as well as between the R2 and the R4; the other arm of the crossed resistance network is connected with four resistors R6, R10, R9 and R5 in sequence; two ends of the other arm are respectively connected between the R1 and the R2 and connected with a mobile contact of the adjustable resistor W1; and two ends of an output signal of the resistance strain type weighing sensor simulator are respectively between the R6 and the R10 as well as between the R9 and the R5. According to the resistance strain type weighing sensor simulator, high-precision simulation signals can be generated.

Description

technical field [0001] The invention relates to a strain sensor simulator, in particular to a resistance strain type weighing sensor simulator. Background technique [0002] Strain gauge load cells are often used in harsh production processes such as high temperature, high dust, water and oil pollution, and failures are inevitable. During maintenance, the multimeter measurement method is commonly used to judge the weighing system failure, that is, use a multimeter to measure the input / output impedance of the sensor and measure the output millivolt signal. The method can quickly judge the fracture of the strain gage of the strain gauge load cell and the disconnection fault of the signal cable of the junction box. However, it is difficult to judge the fault that the sensor strain gauge falls off and the input / output impedance does not change. We can only stop production, and judge by adding or subtracting weights to the weighing system according to the calibration method. D...

Claims

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Application Information

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IPC IPC(8): G01G3/142G01G23/01
Inventor 郭键李明朱杰陈蕾郭奕崇
Owner BEIJING WUZI UNIVERSITY
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