Digital module with temperature compensating function and temperature compensating method thereof

A temperature compensation, digital module technology, applied in the field of digital modules, can solve the problems of complex sensor structure, long thermal balance auxiliary time, low production efficiency, etc., to improve comprehensive accuracy and reliability, good consistency, and enhanced anti-interference ability. Effect

Active Publication Date: 2012-02-15
KELI SENSING TECH NINGBO CO LTD
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Problems solved by technology

The traditional compensation method requires more than ten components, all of which are manually tested and welded. This method not only complicates the structure of the sensor, but also generally requires testing at multiple temperatures such as -10°C, 20°C and 40°C. Alternating test, the test time is generally 22 hours per piece, of which the temperature rise and fall of the load cell and the heat preservation time are about 19 hours, due to the long auxiliary time of heat balance, the whole test time is long, not only the energy cons

Method used

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  • Digital module with temperature compensating function and temperature compensating method thereof
  • Digital module with temperature compensating function and temperature compensating method thereof
  • Digital module with temperature compensating function and temperature compensating method thereof

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Embodiment Construction

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0018] see figure 1 and figure 2 , a digital module with temperature compensation function, including temperature measurement and reference voltage circuit 1, AD sampling circuit 2, microcontroller interface circuit 3, power supply circuit 4, interface circuit 5 and communication circuit 6.

[0019] Temperature measurement and reference voltage circuit 1, external digital temperature sensor, such as precision digital temperature sensor MCP9804. The output end of the temperature measurement and reference voltage circuit 1 is connected to the single-chip microcomputer interface circuit 3, and the data collected by the digital temperature sensor is transmitted to the single-chip microcomputer interface circuit 3 for processing for temperature compensation.

[0020] The interface circuit 5 includes three interfaces, the emulation and programmin...

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Abstract

The invention discloses a temperature compensating method of a digital module with a temperature compensating function. The digital module comprises a one-chip microcomputer interface circuit, and a temperature measurement and reference voltage circuit connecting with the one-chip microcomputer interface circuit. An interface of the temperature measurement and reference voltage circuit is in external connection with a digital temperature sensor. The temperature compensating method includes a zero temperature compensating method and a sensitivity temperature compensating method, and is characterized in that the zero compensation adopts a point-slope form formula: AD compensation dosage=K(TX-T Fsign)+AD Z; the sensitivity compensation adopts the formula: N<output>=N<actual measurement>-((N<actual measurement>-N<datum point>)*K<per Kg>+K<datum point>*(T<actual measurement>-T<datum point>).

Description

technical field [0001] The invention relates to a digital module, especially a digital module with a temperature compensation function, and also relates to a method for temperature compensation of the digital module. Background technique [0002] The load cell is a device that converts the quality signal into a measurable electrical signal output. Due to the influence of various internal influencing factors and external environmental conditions, its output characteristics will greatly deviate from the ideal output characteristics. In order to improve the weighing To improve the comprehensive performance index of the heavy sensor, various compensation measures must be taken. [0003] The load cell has 6 major compensations, which are zero point compensation, zero point temperature compensation, sensitivity compensation, sensitivity temperature compensation, nonlinear compensation and input resistance standardization adjustment. The traditional compensation method requires mo...

Claims

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Application Information

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IPC IPC(8): G01G23/48
Inventor 梅科达赵宁蓝晓荣柯建东
Owner KELI SENSING TECH NINGBO CO LTD
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