Five Factors Influencing the Accuracy of Electronic Universal Testing Machines

1. The first is the ball screw that drives the sensor moving parts. If there is a gap in the screw, the experimental data will directly affect the deformation and elongation after breaking. Some of the electronic all-round test machines on the market currently use T-shaped popular screws. In this way, the gap is relatively large, and the friction is relatively shorter than the service life. The screw used by Jianghu Open Source Testing Machinery Factory is a German Youli Nieff high-precision, gapless ball screw. The surface quenching hardness is HRC58-62, and the service life can reach decades. And the accuracy of the guarantee remains unchanged.

2. The second isElectronic universal testing machineThe transmission system is currently on the marketTesting machineSome transmission systems use reducers, while others use common belts. The primary problem of these two transmission methods: the first type requires adding smooth oil on time, while the latter type cannot guarantee the synchronization of the transmission and affect the experimental consequences. The transmission system of the open source instrument uses a full arc synchronous belt to reduce the speed, which ensures the synchronization accuracy of the transmission, high transmission accuracy, high efficiency, stable transmission, low dry sound, and no maintenance and long service life.

3. ThenTesting machineThe force value sensor, because the black and white of the sensor determines the accuracy and strength measurement invariance of the test machine, the current market tensile sensors are generally S-type sensors, and the main sensors are generally wheel-type sensors. The internal sensors are generally resistive strain gauge type. If the accuracy of the strain gauge is not high or the glue used for fixed strain gauge can be poor. Perhaps the sensor data is poor, it will affect the accuracy and service life of the sensor. The imported sensor used in open source instruments is the world-renowned sensor manufacturer, the United States Quanli Sensor. The sensor has high accuracy, good linearity, and its functions are very unchanged. It will not change for decades.

4. AgainTesting machineThe power source (motor) is also called a motor. Some test machines on the market currently use common three-phase motors or variable frequency motors. This motor uses imitation signal control, slow response, accurate positioning, and narrow speed regulation. There is no low speed when there is high speed, or there is no high speed when there is low speed, and the speed control is absolutely absolutely prohibited. The motor used in open source instruments is the Japanese Panasonic full-digital AC servo motor. The control method adopts full digital pulse control, with wide speed regulation limits, and can reach 0.001-1000MM/MIN. The control positioning is accurate and the response is fast. The full speed can be added to 0.01 seconds. This motor can ensure the accurate full-scale speed control, and the service life is long, which can reach decades without maintenance.

5. FinallyTesting machineThe measurement and control system (that is, software and hardware) is currently a major part of the marketTension machineThe measurement and control system adopts an 8-bit microcontroller, with low sampling speed and poor anti-interference. The other is the AD converter. If the number of bits of the AD converter is the low resolution. Then the measurement will not be accurate. The measurement and control system of open source instruments uses the 32-bit ARM skill developed by the world's advanced predecessors HytestV6.0. This regulator is based on the 32-bit ARM platform and operates the time-dependent multi-compulsory operating system developed by our company. The order is more stable and the system remains unchanged. The sampling speed can reach 200 times per second. With the addition of a 24-bit high-precision low-sonic high-speed AD converter, the entire measurement and control system has higher accuracy and high invariance to control the entire experimental process. The software of the upper computer is a fully digital three-division control software developed by open source instruments for 2 years. There are two control methods a. PID control conditioning method b. Mohu control conditioning method (the first in the industry). This allows the entire experimental process to achieve constant force control, constant displacement control, constant deformation control, low frequency control, and arbitrary control.