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Multichannel temperature acquisition system

A temperature acquisition system, multi-channel technology, applied to thermometers, thermometer parts, thermometers with direct heat-sensitive electric/magnetic components, etc., can solve the problem of not being able to reach ultra-precision temperature control systems, many modules, difficult Problems such as installation and use, to achieve the effect of increasing the acquisition channel, satisfying the use, and simple structure

Active Publication Date: 2009-12-02
SHANGHAI MICRO ELECTRONICS EQUIP (GRP) CO LTD
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AI Technical Summary

Problems solved by technology

However, due to the limitation of the accuracy of the sensor, the acquisition accuracy is only 0.5 degrees Celsius, which cannot meet the requirements of an ultra-precision temperature control system, and there are many modules that are difficult to install and use

Method used

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Embodiment Construction

[0036] In order to make the technical features of the present invention more comprehensible, the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0037] see figure 1 , figure 1 It is a schematic diagram of a multi-channel temperature acquisition system according to an embodiment of the present invention. The multi-channel temperature acquisition system includes a sensing unit 8 , a current source 7 , a multi-channel scanning switch unit 5 , an analog-to-digital converter 4 , a controller 3 , a memory 2 , and a communication unit 1 .

[0038] see figure 2 , figure 2 It is a schematic diagram of the current source structure of the embodiment of the present invention. The current source 7 is an adjustable current source for providing current excitation to the sensing unit 8 . The current source 7 includes a voltage source 79, a group of switch resistors (i.e. a switch resistor 71, a switch resistor 72, a swi...

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Abstract

The invention provides a multichannel temperature acquisition system, which comprises a sensing unit, a current source, a multichannel scan switch unit, an analog-to-digital converter, a controller, and the like, wherein the sensing unit comprises a group of temperature sensors for acquiring temperature of the environment surrounding the multichannel temperature acquisition system; the current source is used for providing exciting current for the sensing unit; the multichannel scan switch unit is used for selecting the temperature sensors of the sensing unit and sending temperature data acquired by the selected temperature sensors to the analog-to-digital converter; the analog-to-digital converter is used for converting an analog signal selected by the multichannel scan switch unit into a digital signal and providing the digital signal to the controller; and the controller is used for processing a switch selection signal provided by the multichannel scan switch unit, a selection signal provided by the current source and the digital signal of the analog-to-digital converter and providing the signals to a storage. The multichannel temperature acquisition system has simple structure and improves the acquisition precision.

Description

technical field [0001] The invention relates to a temperature acquisition system, in particular to a multi-channel temperature acquisition system. Background technique [0002] Temperature control is the basis of many high-tech technical equipment and product development, and is widely used in equipment in steel, chemical, food, pharmaceutical and electronic industries. High-precision temperature acquisition is the premise and condition of ultra-precision temperature control. The sampling accuracy of temperature depends on the accuracy of the current source and the sampling accuracy of the analog-to-digital converter. For high-precision temperature acquisition with multiple channels, the scan time becomes a major factor restricting the sampling accuracy. [0003] Chinese patent No. 02152772.5 discloses a temperature measurement device, which uses an infrared temperature sensor and a fixed frame to realize a non-contact temperature measurement function. Such devices are bul...

Claims

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Application Information

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IPC IPC(8): G01K1/02G01K7/20G01K7/24
Inventor 庄车池峰周月豪
Owner SHANGHAI MICRO ELECTRONICS EQUIP (GRP) CO LTD
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