Sensor frequency response broadening method
A sensor and frequency response technology, which is applied in the broadening field of sensor frequency response, and can solve a large number of problems such as mechanical structure and hardware circuit.
Active Publication Date: 2020-12-18
JIANGSU DONGHUA TEST CORP
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Problems solved by technology
The conventional sensor frequency response expansion method is to add a force feedback measurement device inside the sensor, which measures the input force through the servo balance between the feedback force (or torque) and the input force (or torque), and the sensor can be further improved through force feedback. frequency response range, this method requires a large number of mechanical structures and hardware circuits to achieve
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[0102] Now in conjunction with accompanying drawing, the technical invention is described in further detail. These drawings are all schematic diagrams, and only illustrate the basic structure of the technical invention in a schematic manner, so they only show the configurations related to the technical invention.
[0103] Such as Figure 1 to Figure 5 As shown in , the sensor to be corrected and the reference sensor are placed on the vibrating table, and the frequency response characteristics of the sensor to be corrected are obtained through the vibrating table ( image 3 ), according to the obtained frequency response characteristics, the correction coefficient is calculated by software algorithm ( Figure 4 ), and the least squares polynomial fitting is performed on the correction coefficient to obtain the fitted polynomial ( Figure 5 ), design an arbitrary frequency response filter according to the fitted polynomial, bring the corresponding filter into the DSP digital s...
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The invention provides a sensor frequency response broadening method, and the method comprises the following steps: after obtaining sensor frequency response characteristics, performing calculating toobtain a frequency response correction coefficient, carrying out least square fitting on the frequency response correction coefficient, designing a corresponding arbitrary frequency response filter according to a fitted polynomial, obtaining a filter weight coefficient, and writing the filter weight coefficient into a DSP; and carrying out the time processing on data responded by the sensor, so the frequency response range of the sensor is widened. According to the method, the correction calculation of the frequency response of the sensor can be realized only by using a real-time calculationmethod of the DSP, any corresponding frequency response filter is designed according to the fitted polynomial, and the response data of the sensor is processed in real time through the designed any frequency response filter. According to the method, a hardware circuit required by conventional correction is omitted, and the cost is saved.
Description
Technical field: [0001] The invention relates to a method for broadening the frequency response of a sensor, belonging to the technical field of sensor measurement. Background technique: [0002] Sensor frequency response: The frequency response characteristics of the sensor, the frequency range that can be measured correctly, and the collected signal can be guaranteed not to be distorted within this frequency range. For the sensor measurement system, it can be understood as a single-degree-of-freedom system, which determines the frequency response characteristics of the sensor from the design principle. The conventional sensor frequency response expansion method is to add a force feedback measurement device inside the sensor, which measures the input force through the servo balance between the feedback force (or torque) and the input force (or torque), and the sensor can be further improved through force feedback. frequency response range, this method requires a large numb...
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IPC IPC(8): G01H17/00
CPCG01H17/00Y02T90/00
Inventor 陈泳焦亮王江波
Owner JIANGSU DONGHUA TEST CORP