Separation compensation temperature control device
A temperature control device, low temperature technology, applied in the direction of temperature control, non-electric variable control, control/regulation system, etc., can solve the problems of small compensation range, inconsistent high and low temperature slopes, small working temperature range, etc., to achieve high compensation accuracy, The effect of small error and wide compensation range
Pending Publication Date: 2019-02-15
YANGZHOU HAIKE ELECTRONICS TECH CO LTD
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Problems solved by technology
The existing products of the same type have the following disadvantages: 1) The working temperature range is small, generally -30~+60°C; 2) The compensation range is small, generally around 1V; 3) The high temperature zone and the low temperature zone can only have the same slope , it is impossible to achieve separation compensation for inconsistent high and low temperature slopes
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[0043] combine figure 1 , The separation compensation temperature control device of the present invention includes a temperature sensing circuit, a separation drive circuit and a calibration circuit. The main indicators describing this technology are: 1) peak-to-peak compensation voltage: 120mV; 2) typical temperature slope: 15mV / ℃ (high and low temperature can be adjusted separately); 3) compensation range: >2.5V; 4) operating temperature range: -40~+85℃; 5) Size: (length) 25mm×(width) 15mm×(height) 5mm.
[0044] combine figure 1 As shown in Table 1, the temperature sensing circuit part includes a temperature sensor S1, a double-pole double-throw switch U6, a first operational amplifier U1, and peripheral first to sixth resistors R1-R6.
[0045] The temperature information is first converted into voltage information by the temperature sensor S1 (TMP36). The temperature sensor TMP36 is a high-precision temperature sensor, and its temperature measurement accuracy is within ±2...
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The invention discloses a separation compensation temperature control device, which includes a temperature sensing circuit, a separation driving circuit and a calibration circuit. The temperature sensing circuit uses a temperature sensor to measure external temperature change, converts temperature change into voltage signal change, and adjusts the temperature compensation zero point through a subtraction circuit. The separation driving circuit carries out driving amplification of a voltage signal output by the temperature sensing circuit, the amplified voltage signal is connected to two diodesin opposite directions, and the high-temperature voltage and the low-temperature voltage are separated and then output. The calibration circuit adds together and synthesizes the high-temperature voltage and the low-temperature voltage. The added and synthesized voltage is forwardly added to an adjustable voltage output from one voltage divider network on one hand, and is reversely added to an adjustable voltage output from the other voltage divider network on the other hand. Normal temperature zero-in calibration is carried out by adjusting the voltage divider networks. The separation compensation temperature control device has the advantages of wide temperature regulation range, high temperature resolution and high and low temperature separate adjustment, and has a broad application prospect.
Description
technical field [0001] The invention belongs to the technical field of electronic circuits, in particular to a separation compensation temperature control device. Background technique [0002] Zero-point drift is a common phenomenon in electronic circuits, and electronic components working in a wide temperature range (-40 to +85°C) especially require precise zero-point drift temperature compensation technology. For electronic components with consistent temperature characteristics in high-temperature and low-temperature regions, the zero-point drift can be eliminated by temperature sensors; but for the case of inconsistent temperature slopes in high-temperature and low-temperature regions, traditional zero-point drift suppression technology cannot meet the design requirements. [0003] The separation compensation temperature control technology is a temperature compensation technology applied to eliminate the zero drift of the DC signal. The main indicators describing this te...
Claims
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IPC IPC(8): G05D23/20
CPCG05D23/20
Inventor 张得才李亮陈坤尹红波
Owner YANGZHOU HAIKE ELECTRONICS TECH CO LTD