In the use of computer test machine test process, due to various reasons, it will produce a certain data error, then in the usual use of how to avoid this kind of situation?
Suzhou Chong Heng electronic instrument to sum up the influence of the test results of the test machine error there are three main factors:
One, the tension machine itself will make the test results appear error:
1: the main part of the error
When the main part of the main engine is installed, it will cause the working piston and cylinder wall to generate friction force, and the error can be produced. The error of the error is smaller, and the error is smaller with the increase of the load. Need the installation first check test machine is installed, the host with box type level gauge in the outer ring of the working cylinder (or column) are perpendicular to each other in two directions of leveling.
2: load sensor
Force sensor is one of the indispensable components of the tensile testing machine, and its technical index has a great influence on the accuracy of the testing machine. Most of the current use of strain type load sensor, the impact of load sensor performance indicators include: accuracy, repeatability, linearity, hysteresis, long-term stability, creep / creep recovery, output temperature, etc.. But the manufacturer of the testing machine is only concerned about the comprehensive error index, but it is easy to ignore the other technical indexes, and the long-term stability of the test machine is not ideal. In the actual verification, the verification staff will find that some electronic pulling machine in the calibration data value is very good, but over a period of time will appear larger error, which is often due to sensor instability caused by. For this kind of situation, it is necessary to change the load sensor with better performance.
Two, human operation will appear error
Because of the difference in the resolution, bad habits and the theoretical level of the different measuring personnel, the test equipment has been determined. The result is determined by the comprehensive quality of the test personnel. If the professional knowledge and theoretical level is relatively lack, not through better training is difficult to adapt to the needs of verification.
Three, environmental factors
1: the influence of environmental factors is usually refers to the tensile testing machine as the temperature, humidity, air pressure, electromagnetic field, mechanical vibration, sound, light, radioactive and other factors, the additional error caused by.
2: because the sensor and instrument for temperature, humidity, vibration, power supply voltage, electromagnetic field is more sensitive, laboratory temperature and humidity must be controlled in a certain range, high test temperature, easy to test equipment, sensors and other frequency increase, and indoor humidity if too high, but will lead to equipment rust. In the laboratory can not exist the phenomenon of vibration, vibration generated will have an impact on the test data, and a long time in this case, will lead to the sensitivity of the sensor, encoder, etc.. The power supply voltage should be stable, the fluctuation of the power supply is too big, the voltage fluctuation is too large, the electric appliance can lead to the failure of the electric appliance.
Suzhou Chong Heng electronic instrument to sum up the influence of the test results of the test machine error there are three main factors:
One, the tension machine itself will make the test results appear error:
1: the main part of the error
When the main part of the main engine is installed, it will cause the working piston and cylinder wall to generate friction force, and the error can be produced. The error of the error is smaller, and the error is smaller with the increase of the load. Need the installation first check test machine is installed, the host with box type level gauge in the outer ring of the working cylinder (or column) are perpendicular to each other in two directions of leveling.
2: load sensor
Force sensor is one of the indispensable components of the tensile testing machine, and its technical index has a great influence on the accuracy of the testing machine. Most of the current use of strain type load sensor, the impact of load sensor performance indicators include: accuracy, repeatability, linearity, hysteresis, long-term stability, creep / creep recovery, output temperature, etc.. But the manufacturer of the testing machine is only concerned about the comprehensive error index, but it is easy to ignore the other technical indexes, and the long-term stability of the test machine is not ideal. In the actual verification, the verification staff will find that some electronic pulling machine in the calibration data value is very good, but over a period of time will appear larger error, which is often due to sensor instability caused by. For this kind of situation, it is necessary to change the load sensor with better performance.
Two, human operation will appear error
Because of the difference in the resolution, bad habits and the theoretical level of the different measuring personnel, the test equipment has been determined. The result is determined by the comprehensive quality of the test personnel. If the professional knowledge and theoretical level is relatively lack, not through better training is difficult to adapt to the needs of verification.
Three, environmental factors
1: the influence of environmental factors is usually refers to the tensile testing machine as the temperature, humidity, air pressure, electromagnetic field, mechanical vibration, sound, light, radioactive and other factors, the additional error caused by.
2: because the sensor and instrument for temperature, humidity, vibration, power supply voltage, electromagnetic field is more sensitive, laboratory temperature and humidity must be controlled in a certain range, high test temperature, easy to test equipment, sensors and other frequency increase, and indoor humidity if too high, but will lead to equipment rust. In the laboratory can not exist the phenomenon of vibration, vibration generated will have an impact on the test data, and a long time in this case, will lead to the sensitivity of the sensor, encoder, etc.. The power supply voltage should be stable, the fluctuation of the power supply is too big, the voltage fluctuation is too large, the electric appliance can lead to the failure of the electric appliance.
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