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A dynamic torque calibration device

A technology of dynamic torque and calibration devices, which is applied in the direction of measuring devices, force/torque/power measuring instrument calibration/testing, instruments, etc., and can solve problems such as inability to calibrate dynamic torque

Active Publication Date: 2019-02-19
BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a dynamic torque calibration device in order to solve the problem that the dynamic torque cannot be calibrated in the prior art

Method used

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  • A dynamic torque calibration device
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  • A dynamic torque calibration device

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Experimental program
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Embodiment 1

[0039] The dynamic torque control system of the present invention generates dynamic torque by means of a motor driving a standard moment of inertia block. as attached figure 1 As shown, a split brushless torque motor is used as the torque generator, and the motor rotor drives the lower air bearing shaft, feedback grating, torque sensor to be calibrated, upper air bearing shaft, cylindrical grating, and moment of inertia standard block to move together. The payload inertia of the moving parts above the torque sensor to be calibrated and the angular acceleration during motion are calculated to obtain the torque value. To generate high-quality torque waveforms, the attached image 3 The closed-loop control method shown controls the motor.

[0040] The moment of inertia of the standard moment of inertia block is a known quantity, and the no-load moment of inertia connecting the shaft system between the standard moment of inertia block and the torque sensor can be accurately meas...

Embodiment 2

[0047] Dynamic torque calibration data acquisition and analysis using the attached figure 2 Shown is a system based on a PXI bus computer. The system inserts 1 computer module, 1 high-speed data acquisition module, 2 data acquisition modules, 1 arbitrary wave generation module, and 1 control module. The computer module is the heart of the system, running software and storing data. The arbitrary wave generator module can convert digital signals into analog signals through 16-bit D / A for motor control. The control module is used to control the air source.

[0048] Step 1. The dynamic torque calibration device uses a split torque motor to drive the moment of inertia load to generate torque, and generates rotational motion according to the dynamic torque waveform to be excited. The torque sensor senses the amount of torque generated and outputs an electrical signal.

[0049] Step 2: Use laser interferometer 1 to cooperate with grating 1, and laser interferometer 2 to cooperat...

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Abstract

The invention relates to a dynamic torque calibrating device, and belongs to the field of metering and testing. According to the device, a dynamic torque is generated in a manner that a motor drives a rotating shaft and further drives a standard rotational inertia block. A rotational inertia of the standard rotational inertia bloc is known, and a zero-load rotational inertial of a shafting connected between the standard rotational inertia block and a torque sensor can be measured accurately in the original position. Two laser interferometers cooperate with a cylindrical grating to measure the angular acceleration distribution of the rotational inertia block. The dynamic torque can be traced back to the international system of units (SI) via the rotational inertia and the angular acceleration. The motor is controlled to generate sine, half-sine or other needed torque waveforms.

Description

technical field [0001] The invention relates to a dynamic torque calibration device, which belongs to the field of metering and testing. Background technique [0002] Aviation, aerospace, ships, armored vehicles, marine engineering, material science, anti-terrorist robots and other fields use dynamic torque test systems extensively. However, the above-mentioned equipment cannot be dynamically calibrated and is in the stage of "static standard use". Due to the inconsistency of calibration and use status, the uncertainty of its use is greatly increased. [0003] At present, most of the calibration researches on torque focus on static torque calibration research, and the measurement test calibration of dynamic torque is still in the preliminary research stage. There are generally two types of excitation source signals for dynamic torque: step excitation and sinusoidal excitation. Step torque excitation generally uses a force arm-mass system or a hydraulic system to impose a k...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L25/00
CPCG01L25/003
Inventor 张力彭军杨军李娜娜
Owner BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA