The invention discloses a fiber friction coefficient testing device and relates to the technical field of friction coefficient testing. The fiber friction coefficient testing device comprises a fabricfiber horizontal testing device, a fabric fiber adjustable moving direction testing device, a fabric fiber winch method testing device and a fabric fiber intertwining testing device are arranged on the base, a supporting seat is arranged on the base, a shell is arranged on the supporting seat, a tension detection module is arranged in the shell, a fixing rod is arranged on one side of the shell,an adjusting rod is arranged at one end, away from the shell, of the fixing rod, a first positioning rod is arranged at the top of the adjusting rod, a second positioning rod is arranged at the top ofthe shell, and a hoop is arranged below the fixing rod; a tension rod adjusting box is arranged on the adjusting rod, a tension rod adjusting device is arranged in the tension rod adjusting box, a through hole is formed in the tension rod adjusting box, a tension rod is arranged at the through hole, a tension block is arranged on the tension rod, and a connection nose is arranged on the tension block. The fiber friction coefficient testing device has the advantages that on the basis of the prior art, traction efficiency and measurement flexibility are improved by improving a traction mechanism.

Fiber friction coefficient testing device

Disclosed is a friction test device for testing the friction performance of a coating of a cutting tool (24). The device comprises a rotary fixing mechanism, a cutting mechanism, a feed motion mechanism, a friction mechanism, a data collection mechanism and a pressure regulating mechanism. The rotary fixing mechanism comprises a three-jaw chuck (11), a first driving device used for driving the three-jaw chuck (11) to rotate in a circumferential direction, and a columnar workpiece (13), which is fixedly mounted on the three-jaw chuck (11) and used in a friction test. The cutting mechanism comprises a pedestal (21), a cutting base (22), a turret (23) mounted on the cutting base (22), and a cutting tool (24) mounted on the turret (23), wherein the cutting tool (24) is located beside the columnar workpiece (13). The friction test device can achieve a long testing duration while ensuring sufficient contact pressure.

Friction test device for testing friction performance of coating of cutting tool

The invention discloses a system for measuring a dynamic friction coefficient of yarns. The method comprises a pre-tensioning device, start-stop buttons, a first tension measuring device, a second tension measuring device, a buffer device, a proximity switch, pulleys, indicator lights, a rotating speed measuring device for measuring a running speed of the yarns, a rotating speed adjusting knob, ayarn guiding device, a tangling device, a first stepping motor and an input roller mounted on a spindle thereof, a second stepping motor and an output roller mounted on the spindle thereof, an air tube connected with the yarn guiding device, an air pump connected with the air tube and a residual yarn basket for collecting residual yarns, which are mounted on a front panel of a chassis, as well asa power supply module, an analogue collection module, a relay module, a communication module and a stepping motor driver mounted on the back of the front panel of the chassis. The system provided by the invention has advantages of low use cost, simple operation, capability of testing a constant tension, high detection efficiency and test precision, implementation of real-time control, breakage self-stopping function, buffer anti-breakage function and the like.

System for measuring dynamic friction coefficient of yarns

The invention relates to a filament and yarn friction coefficient tester. The filament and yarn friction coefficient tester comprises a friction roller, a three-jaw chuck, a transmission shaft, a photoelectric sensor, a grating disk, a transmission shaft belt wheel, a belt, a motor belt wheel, a servo motor, a sliding table body, a lead screw, a supporting plate, a sliding block, a data transmission line, a control and detection device, an antenna, a supporting frame, a transmission shaft supporting frame and a sensor module. In the sensor module, a clump weight is arranged on a tray, and the tray is arranged on a sensor. The sensor module transmits pressure change data to the control and detection device through the data transmission line after collecting the pressure change data of the sensor which the clump weight acts on, a closed-ring control function is also achieved, the control and detection device transmits the data to a computer in a wireless transmission mode for analysis and processing, and a friction coefficient value, a friction coefficient curve and the like are obtained. The filament and yarn friction coefficient tester has the advantages that test precision is high, wireless transmission is realized, the friction force change curve is displayed in real time, yarn can be tested, and the friction roller can be replaced.

Filament and yarn friction coefficient tester

The invention discloses a wearable electrocardioelectrode performance evaluation test platform, the wearable electrocardioelectrode performance evaluation test platform comprises a main machine bracket, a first simulator bracket, a second simulator bracket and a measurement and control system which are sequentially mounted on a base; a two-dimensional motion platform is fixedly mounted on the mainmachine bracket, a top end pressure adjusting device is installed on the two-dimensional motion platform; skin simulation modules are installed on the tops of the first simulator bracket and the second simulator bracket, and a bottom end pressure adjusting device is detachably mounted on the middle lower part of the second simulator bracket; and the measurement and control system includes a signal conditioning module, a motor controller, a voltage acquisition module, an electrochemical workstation, and a computer. The wearable electrocardioelectrode performance evaluation test platform has the beneficial effects that the measurement and control system can measure an open circuit voltage between electrocardioelectrodes when no human body electrocardiosignal is available, can simulate a real human body electrocardiosignal to evaluate and test electrocardioelectrode performances, and the computer displays pressure changes, open circuit voltage changes, an electrochemical impedance curve,and electrocardiosignal change curve and the like of an electrode and simulated skin, and can save test data.

Wearable electrocardioelectrode performance evaluation test platform

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Filament and yarn friction coefficient tester

Wearable electrocardioelectrode performance evaluation test platform