技术支持

  • 称重法测重心的不确定度
  • 本站编辑:杭州华准电子有限公司发布日期:2020-12-21 11:18 浏览次数:

衡器偏载调节的目的是使称重时,同样重量的物体无论重心处于承载器的任何位置,称重结果均相同,即误差不会超过规定最大允许误差。这样的衡器也能保证四支传感器在该系统内的力矩是相等的。

The purpose of weighing instrument's bias load adjustment is to make the weighing result of the same weight object no matter the center of gravity is in any position of the carrier, that is, the error will not exceed the maximum allowable error. Such a weighing instrument can also ensure that the torque of four sensors in the system is equal.

这样的衡器在称重时,四支传感器所受力值之和就等于被称物的重量。当测重心时,用传感器的力矩之差就可计算出被测物的相对重心位置,即重心位置的坐标是根据所测的力矩差和承载器几何尺寸,通过计算而得到。所以它的测量误差是可以根据计算重心的公式求得的,根本不需要试验来确定,试验方法仅仅是对测量结果的旁证。

When such a weighing instrument is weighing, the sum of the force values of the four sensors is equal to the weight of the weighing object. When measuring the center of gravity, the relative center of gravity position of the object can be calculated by the torque difference of the sensor, that is, the coordinates of the center of gravity position are obtained by calculation according to the measured torque difference and the geometric size of the carrier. Therefore, the measurement error can be obtained according to the formula for calculating the center of gravity, and no test is needed to determine it. The test method is only the circumstantial evidence of the measurement results.

但对于吊挂式集装箱装置,由于该装置没有承载器,且用来测量的传感器与固定或类似汽车衡的称重装置不同,所以测量结果与实际被测的集装箱的状况关系非常大,对它的校验方法和结果要由基本力学原理来设计,不要轻易地用一些测量的方法来硬套,否则结果一定是不可靠、不合理的。

However, for the hanging container device, because the device has no carrier, and the sensor used for measurement is different from the weighing device fixed or similar to truck scale, the measurement result has a great relationship with the actual condition of the container to be measured. The calibration method and result of the device should be designed by the basic mechanical principle, and it is not easy to use some measurement methods to rigidly cover, otherwise the results will be obtained It's not necessarily reasonable and reliable.

由于微处理器、计算机在称重工程中的广泛运用,特别是当今互联网、大数据的飞速发展,衡器行业中很多有识之士都着重借助这些技术来发展衡器行业。但从另一方面考虑,一些初涉及衡器行业的人往往忽略了衡器的基本原理和规律,在工作中容易犯一些低级错误,产生认识上的混乱,造成工作中的失败。

Due to the wide application of microprocessor and computer in weighing engineering, especially with the rapid development of Internet and big data, many people with insight in weighing instrument industry focus on these technologies to develop weighing instrument industry. However, on the other hand, some people who are initially involved in the weighing instrument industry often neglect the basic principles and laws of weighing instrument, and are prone to make some low-level mistakes in their work, resulting in confusion in understanding and failure in work.

更遗憾的是,他们往往还不知道错在何处,还试图通过所谓的“新理念”、“高科技手段”来解决问题,但这些努力是徒劳的。

What's more, they often don't know what's wrong and try to solve problems through so-called "new ideas" and "high-tech means", but these efforts are in vain.