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A Universal Correction Method for Sensor Systems

A sensor and standard sensor technology, applied in the direction of instruments, etc., can solve the problems affecting the convenience of use of the sensor, and achieve the effect of avoiding calibration work, simplifying the use process, and increasing the flexibility of use.

Active Publication Date: 2020-06-09
CHINA ACAD OF AEROSPACE AERODYNAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, it is often necessary to return to the factory for one-to-one calibration of the sensor and the instrument before it can be used, which greatly affects the convenience of use of the sensor.

Method used

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  • A Universal Correction Method for Sensor Systems
  • A Universal Correction Method for Sensor Systems
  • A Universal Correction Method for Sensor Systems

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Embodiment 1: the load cell S of different batches of the same model a ,S b Access to the same measuring device E m

[0069] Select sensor S as standard r and measuring equipment E r , the standard sensor S r and standard measuring equipment E r connected to form a sensor system. Standard sensor S r In the case of not loading any weight, the original collection value at this time is 52.2, write down D r0 = 52.2. Standard sensor S r In the case of loading a full load of 500kg, the original collection value at this time is 5496.7, record D r1 =5496.7, get calibration reference value C r =(5496.7-52.2) / (500kg)=10.889 / kg.

[0070] the sensor S a and standard measuring equipment E r connected to form a sensor system. Sensor S a In the case of not loading any weight, the original collection value at this time is 173.6, record D s0 = 173.6. Sensor S a In the case of loading a full load of 7kg, the original collection value at this time is 8163.8, record D s...

Embodiment 2

[0075] Embodiment 2: the same type of load cell S without range a ,S c Access to the same measuring device E m

[0076] the sensor S c and standard measuring equipment E r connected to form a sensor system. Sensor S c In the case of not loading any weight, the original collection value at this time is 181.6, write down D s0 = 181.6. Sensor S c In the case of loading a full load of 20t, the original collection value at this time is 10347.8, record D s1 =10347.8, calculate S c The calibration reference value C sc =(10347.8-181.6) / (20t)=508.31 / t.

[0077] When sensor S a and measuring equipment E m When connected to form a sensor system, the system correction value C a =(1141.5 / kg)·(6.7304 / kg) / (10.889 / kg)=705.55 / kg, system correction relationship The unit is kg. ,

[0078] When sensor S c and measuring equipment E m When connected to form a sensor system, the system correction value C c =(508.31 / t)·(6.7304 / kg) / (10.889 / kg)=314.18 / t, system correction relations...

Embodiment 3

[0079] Embodiment 3: load cell S a , temperature sensor S d Access to the same measuring device E m

[0080] The temperature sensor S d and standard measuring equipment E r connected to form a sensor system. temperature sensor d At 0°C, the original collection value is -72.3, write down D s0 =-72.3. temperature sensor d When loaded to 100°C, the original collection value is 9382.4, write down D s1 =9382.4, calculated temperature sensor S d Calibration reference value C′ s =(9382.4+72.3) / (100°C)=94.547 / °C).

[0081] When sensor S a and measuring equipment E m When connected to form a sensor system, the system correction value C a =(1141.5 / kg)·(6.7304 / kg) / (10.889 / kg)=705.55 / kg, system correction relationship The unit is kg. , the system corrects the relation,

[0082] When the temperature sensor S d and measuring equipment E m When connected to form a sensor system, the system correction value C d =(94.547 / ℃)·(6.7304 / kg) / (10.889kg)=58.439 / ℃ / , system correcti...

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Abstract

The invention provides a general correction method for a sensor system. The method comprises the following steps: (1) acquiring a variation of an original acquisition value of a measuring instrument caused by a unit load of a standard sensor as a calibration reference value Cr; (2) acquiring a variation of an original acquisition value of a standard measuring device Er caused by a unit load of a sensor to be calibrated as a calibration value Cs of the sensor to be calibrated; (3) acquiring a variation of an original acquisition value of measuring equipment to be calibrated caused by a unit load of the standard sensor as a calibration value Ce of the measuring equipment to be calibrated; (4) calculating the correction value C=Cs.Ce / Cr of a sensor system to be calibrated, and acquiring an original acquisition value D0 of the measuring equipment to be calibrated when the sensor to be calibrated is unloaded; and (5) correcting an original acquisition value d1 of the measuring equipment tobe calibrated after the sensor to be calibrated is loaded to obtain the load of the sensor to be calibrated. The method greatly improves the calibration efficiency and ease of use of the sensor.

Description

technical field [0001] The invention relates to a general correction method for a sensor system, which can realize arbitrary pairing of sensors and instruments without recalibration, is mainly used in sensor digital measurement systems, and belongs to the field of sensor and measurement technology. Background technique [0002] Sensors are sensing elements of physical quantities and are used in monitoring and measurement industries. The mainstream sensors in the market mostly use electrical signals to output signals. Due to the technical limitations of the sensor, there are more or less problems such as zero drift and temperature drift, which also leads to the fact that the output signal of the sensor itself does not have a completely unified standard. In order to achieve standard electrical signal output, it is necessary to add a transmitter circuit to calibrate the sensor signal. This kind of transmitter generally has two potentiometers, one is used to adjust the zero va...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01D18/00
CPCG01D18/00
Inventor 张成江田忠涛蓝信韵
Owner CHINA ACAD OF AEROSPACE AERODYNAMICS
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