Brief introduction of speed sensor and load cell

Abstract: The brief information of speed sensor and load cell is provided by excellent flowmeter and flowmeter manufacturers and quotation manufacturers. In the process of using the load cell, there are many problems involving the speed sensor. At present, the speed sensors used in electronic belt scales mainly include magnetoresistive pulse type and photoelectric pulse type. The analog tachogenerator type tachometer has long since been out of use, so use it instead. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is a brief description of speed sensors and load cells. In the process of using the load cell, there are many problems involving the speed sensor. At present, the speed sensors used in electronic belt scales mainly include magnetoresistive pulse type and photoelectric pulse type. The analog tachometer generator type tachometer sensor is no longer used, replaced by the above two digital tachometer sensors that output pulse signals. It can be seen from the weighing principle that the instantaneous flow rate of the material measured by the load cell depends on two parameters, that is, the instantaneous flow rate is equal to the material load value q (kg/m) on the carrier measured by the load cell and the belt measured by the speed sensor. The speed value v (m/s) is obtained by multiplying the two parameters. It can be seen that the measurement accuracy and stability of the speed sensor are equally important as the measurement accuracy and stability of the load cell. At present, the accuracy of the load cell is generally increased to a few ten thousandths, while the accuracy of the speed sensor is mostly a few thousandths. Therefore, improving the accuracy of the speed sensor is one of the effective ways to improve the accuracy of the electronic belt scale system. After the pulse signal of the speed sensor enters the display instrument, the multiplication operation with the signal of the load cell is usually completed in three ways. The first method is that the speed measurement pulse signal is transformed into a 0-10VDC analog signal after being shaped and amplified, and is used as the bridge voltage of the load cell to realize multiplication in the load cell; the second method is that the speed measurement pulse signal is shaped, After amplification, it is converted into an analog (or digital) signal, and multiplied with the amplified analog (or digital) signal of the load cell in a dedicated multiplier; the third method is to directly accumulate the speed measurement pulse signal as a display instrument after shaping. The trigger signal of the accumulator, every time it receives a speed measurement pulse signal, the accumulator will sample the input signal of the load cell once. operation. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'Introduction to Speed ​​Sensors and Load Cells'

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