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Device and method for calibrating high-precision temperature sensor

A temperature sensor, high-precision technology, used in thermometers, measuring devices, thermometer testing/calibration, etc., can solve the problems of high cost and slow calibration speed, and achieve the effect of fast calibration speed and cost reduction

Inactive Publication Date: 2016-07-27
BEIJING ZHILIANAN TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention provides a device and method for calibrating a high-precision temperature sensor, which is used to solve the problems of relatively high cost and slow calibration speed for temperature calibration after assembly into finished products in the prior art

Method used

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  • Device and method for calibrating high-precision temperature sensor

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Embodiment 1

[0014] Embodiment 1, the device for calibrating a high-precision temperature sensor of this embodiment, see figure 1 As shown, it includes: a test board 11 , a high-precision temperature sensor 12 to be calibrated, a high-precision temperature reference element 13 and a high-precision analog-to-digital converter 14 placed on the test board 11 , and a reading unit 15 . The specific connection relationship is that the high-precision temperature reference element 13 , the high-precision analog-to-digital converter 14 and the reading unit 15 are connected in sequence, and the high-precision temperature sensor 12 to be calibrated is connected with the reading unit 15 . More preferably, the high-precision temperature reference element 13 can be integrated on the test board 11; the inside of the high-precision temperature sensor 12 to be calibrated also includes: a non-volatile storage medium 121, which is used to store the calibration data, and in the product When the terminal uses ...

Embodiment 2

[0016] Embodiment 2, the method for calibrating a high-precision temperature sensor of this embodiment, see figure 2 shown, including the following steps:

[0017] S21. Heating the high-precision temperature sensor to be calibrated and the high-precision temperature reference element to the target temperature.

[0018] S22. Read the values ​​of the high-precision temperature sensor to be calibrated and the high-precision temperature reference element respectively.

[0019] S23. Obtain calibration data according to the read value.

[0020] S24. The high-precision temperature sensor to be calibrated reads the calibration data to complete its own calibration.

[0021] In a specific implementation, the high-precision temperature sensor to be calibrated can use a Bluetooth temperature chip. In the chip final test (FT) stage, when designing the test board (loadboard), the Bluetooth temperature chip, the high-precision temperature reference element (that is, the calibrated high-p...

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Abstract

The invention provides a device and method for calibrating a high-precision temperature sensor to solve the problems of relatively high cost and slow calibration speed for temperature calibration after assembly into finished products in the prior art. The device includes: a test board, and a high-precision temperature sensor to be calibrated, a high-precision temperature reference element and a high-precision analog-to-digital converter placed on the test board, and also includes: a reading unit; a high-precision temperature reference element, a high-precision analog-to-digital converter The converter is connected to the reading unit in sequence, and the high-precision temperature sensor to be calibrated is connected to the reading unit. The method includes: heating the high-precision temperature sensor to be calibrated and the high-precision temperature reference element to the target temperature; respectively reading the high-precision temperature sensor to be calibrated and the high-precision temperature reference element; and obtaining calibration data according to the read values. The invention completes the temperature test and calibration of the high-precision temperature sensor at the chip stage, effectively reduces the cost, and has high calibration speed.

Description

【Technical field】 [0001] The invention relates to the field of electronic components, in particular to a device and method for calibrating a high-precision temperature sensor. 【Background technique】 [0002] After the high-precision temperature sensor is produced, due to the limitation of the production process, it is difficult to achieve complete consistency. As a result, the final product can only guarantee a certain degree of linearity, but there is a certain degree of error in the temperature offset and slope. In order to make the final product meet the required high precision, such as 0.1 degrees Celsius, it is necessary to calibrate the temperature sensor on the production line to ensure that the final product meets the precision requirements. The existing solution is to perform temperature calibration on the product side. Since the product has already been assembled, target temperature loading and calibration parameter reading and storage all require expensive equipm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K15/00
CPCG01K15/005
Inventor 钱炜梁政吕悦川
Owner BEIJING ZHILIANAN TECH
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