What is a weighing instrument
The weighing instrument is actually a device that converts the quality data signal into an electronic signal output that can be accurately measured. When using a sensor, you must first consider the specific office environment where the sensor is located. This is particularly important for the proper use of a weighing instrument. It is related to whether the sensor can work normally, other safety and service life, and even all electronic weighing instruments. The credibility and safety factor. The weighing instrument is composed of a base, polyurethane elastomer, anchor bolts, cables and other parts. Polyurethane elastomer is a force-bearing component. The resistance strain gauge is glued to the polyurethane elastomer according to a certain processing technology to form a Wheatstone bridge, and a set of stable high-precision switching power supplies are presented by the outside world. When the polyurethane elastomer does not bear the load, the bridge circuit is in a balanced state and the output voltage is zero. When the polyurethane elastomer bears the load, due to the deformation of the polyurethane elastomer, the internal resistance of the resistance strain gauge changes, which makes the bridge circuit unbalanced, and the working voltage data signal will be output. The size of the data signal output is positively correlated with the load on the polyurethane elastomer. What is the weighing instrument sensor is generally used with the supporting facilities of the weighing data digital display instrument. The weighing display shows the fine switching power supply for the sensor. In addition, the data signal output by the sensor is enlarged and actively filtered. After the solution of AD conversion and optical protection, the net weight value of the information can be displayed immediately according to the instrument panel. The analog signal output by the instrument panel is sent to the microcomputer to carry out the data processing method. The old national standard takes into account the two sensors of weighing and force measurement, which are completely different from the application of natural environmental standards, and does not make any difference between the experiment and the evaluation method. The old national standard has 21 index values, all of which are tested at room temperature; and the discrete system, the reason for the deviation of the backwardness, the reason for the deviation of the repeatability, the stress relaxation, the reason for the additional deviation of the zero temperature and the rated value The reason for the extra deviation of the output temperature is the reason for the larger deviation in the 6 index values u200bu200bto clarify the accuracy level of the weighing instrument, which is indicated by 0.02, 0.03, and 0.05 respectively. A force sensor used on electronic weighing instruments. It can convert the force acting on the tested object into a measurable and verifiable output data signal according to a certain proportion. Fully consider the hazards of gravity acceleration of different application addresses and the buoyancy of gas and water to the transformation. The key performance parameters of the weighing instrument are the reasons for the deviation of the linear shape, the reason for the deviation of the backward, the reason for the deviation of the repeatability, the stress relaxation, Zero temperature characteristics and sensitivity temperature characteristics, etc. In a variety of electronic weighing instruments and quality measurement verification system software, the comprehensive reason for the deviation is generally used to generate the accuracy of the comprehensive control sensor, and the reason for the comprehensive deviation is connected with the reason for the deviation of the electronic weighing instrument. It is convenient to adopt a weighing instrument that matches a certain precision electronic weighing instrument. The International Legal Metrology and Verification Agency (OIML) requires that the sensor's deviation cause band δ accounts for 70% of the electronic weighing instrument's deviation cause band Δ, the reason for the deviation of the line shape of the weighing instrument, the cause of the deviation and the reason for the backward deviation. Within the required temperature range, the total number of reasons for deviation caused by the temperature hazard to sensitivity cannot exceed the deviation reason band δ. This allows the manufacturer to adjust each component that constitutes the cause of the total deviation in the measurement verification, and then obtain the desired accuracy.
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