Published on September 19th, 2024 at 02:26 am

In modern sensor testing and certification processes, force value and accuracy are the core standards that determine whether a sensor can obtain international certification. The fully automatic deadweight force standard machine, with its highly precise force reproduction capability, has become an indispensable device in sensor validation, ensuring compliance with international metrology certification requirements.

1.Basic Working Principle

The fully automatic deadweight force standard machine generates a standard force by using known masses (weights), which, based on Newton’s second law, are precisely applied to the sensor being tested. The gravitational force of the weights can be calculated using the formula F = m * g (1 − Pa/Pw), where variables such as Earth’s gravitational acceleration, the air density at the location, and the material density of the weights are all known constants. This system enables highly accurate force output.

The advantage of the deadweight force standard machine is that it does not rely on complex mechanical movements or electric systems to apply force, but instead directly uses calibrated weights to generate the standard force. The stability and accuracy of this force make it critical for ensuring that sensors meet international metrology certification standards, such as OIML and NTEP.

2.Structural and Functional Advantages

This device features a modular design, mainly comprising a weight drive mechanism, main frame, suspension system, and anti-sway device. The weight drive mechanism is driven by an independent electric motor, allowing each weight to be loaded or unloaded quickly and smoothly, ensuring synchronization and stability in the loading process. This minimizes mechanical errors and reduces the system’s reliance on external power.

The moving beam is driven by a high-precision screw mechanism, ensuring that the force applied to the sensor during weight loading is delivered with minimal error. This precise force transfer and control system not only satisfies the requirements for standard force reproduction but also maintains stability during long-term creep tests, thereby verifying the sensor’s reliability and consistency under extended working conditions.

3.Intelligent Operation and Data Processing

The fully automatic deadweight force standard machine is equipped with an advanced computer control system, with PLC automation managing the weight loading and unloading processes. Software applications developed using VB and VC allow for a visual animation of the testing process and real-time monitoring of each operation step and device status. All test results can be exported to Excel and printed, providing users with accurate data reports that meet the strict requirements of sensor certification.

Especially during complex sensor performance tests, such as creep tests, the device can automatically complete the test based on preset weight combinations, ensuring that the sensor’s performance under high load conditions meets international standards. Users can select the test type from the control panel, view real-time data, and export historical test results, making the entire process more efficient and precise.

4.Irreplaceable Role in Sensor Certification

Whether a sensor can pass international certification depends on its performance in rigorous metrological tests, and the high-precision force reproduction of the fully automatic deadweight force standard machine is a core tool in this certification process. Through its independently driven electric loading system, the device provides unparalleled force consistency and reliability, ensuring that sensors pass stringent testing standards in international certifications such as OIML and NTEP.

The fully automatic deadweight force standard machine not only simplifies complex testing processes but also significantly improves testing efficiency and reliability by precisely applying force values and automating operations. Passing tests with this device is a necessary step for sensors to gain international certification, providing strong technical support for their recognition in global markets.

 Conclusion

With its precise force reproduction and highly automated operation, the fully automatic deadweight force standard machine has become an indispensable device in sensor testing and international certification. It not only ensures accuracy and consistency in the testing process but also lays a technical foundation for the widespread application of sensors in global markets. This machine is one of the most trusted devices in international metrology certification.