Rotating shaft torque test system

Abstract

The invention relates to a rotating shaft torque test system. The system provided by the present invention comprises a power supply circuit, a strain circuit, an amplification circuit, an acquisition module and a receiver; the strain circuit converts a strain signal into a weak voltage signal; the amplification circuit amplifies the weak voltage signal; the acquisition module converts the amplified voltage signal into a digital signal; the receiver receives the digital signal; the receiver wirelessly transmits the digital signal and converts the digital signal into a corresponding torque value; the power supply circuit is connected in parallel with an adjustable capacitor loop; and the adjustable capacitor loop performs secondary side parallel resonance compensation, so that an adjustable capacitor and a secondary side inductor are in a resonance state, and a stable constant current source is output. The output current of the rotating shaft torque test system is equivalent to the constant current source; the rotating shaft torque test system is good in circuit output characteristic and high in power factor, provides a stable power supply for an amplification loop; and the problem that an excitation power supply is unstable is solved, and the torque test accuracy is improved.

Description

technical field [0001] The invention relates to the technical field of torque testing, in particular to a rotating shaft torque testing system. Background technique [0002] As the torque test has become an important part of the test and calibration of the automotive transmission system, there are two main ways to provide energy for the rotating torque test system: slip ring power supply and battery power supply. However, the carbon deposition of the slip ring power supply and the limited power of the battery power supply make these two power supply circuits unable to meet the requirements of torque testing and testing conditions. Specifically, the slip ring power supply adopts the method of sliding contact between the brush and the collector ring, and there are limitations in use such as sliding wear, contact sparks, carbon deposits, and unsafe exposed conductors; battery power supply has limited power and high requirements for the power supply environment. A series of sho...

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, the output characteristics of the non-contact induction power supply circuit of the automobile torque test system directly determine the reliability and stability of the test system, thus directly affecting the accuracy of the torque test

The non-contact inductive power supply realizes wireless power supply through coupling technology. However, due to the harsh working conditions of system testing and calibration, and excessive frequency of use, problems such as excitation and other power supply instability often occur, such as increased impedance, no The increase of power and the decrease of power factor lead to problems such as torque out-of-tolerance and zero-point drift in the torque test, which affect the accuracy of the torque test.

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