Temperature Acquisition Circuit
A technology of acquisition circuit and power circuit, which is applied in the field of temperature acquisition circuit, can solve the problem of relatively accurate temperature range width, etc., and achieve the effect of high feasibility, simple circuit structure and low cost
Active Publication Date: 2018-05-29
YUNCHENG POWER SUPPLY COMPANY OF STATE GRID SHANXI ELECTRIC POWER +1
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Problems solved by technology
[0002] In the circuits of small white appliances, many circuit boards have temperature sampling circuits. The method of using thermistors to realize temperature sampling has always been the method used by many circuit designers and complete machine manufacturers. However, in the traditional use of thermal In the sensitive resistor sampling circuit, due to the different characteristics of the thermistor’s resistance change in different temperature ranges, it is impossible to achieve a very wide range of relatively accurate temperature in the case of the same voltage divider resistor, so for some special For products that require a wide range of display (such as some hot water pots, dryers, etc.), if you want to use a low-cost thermistor solution, you must modify the original circuit
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[0013] like figure 1 As shown, the temperature acquisition circuit includes: a power supply circuit 1, an oscillation circuit 2, a control circuit 3 and a temperature sensor circuit 4. The output end of the power supply circuit 1 is connected to the input end of the oscillation circuit 2, and the oscillation circuit 2 The output end of the control circuit 3 is connected to the input end of the control circuit 3 , and the output end of the control circuit 3 is connected to the input end of the temperature sensor circuit 4 .
[0014] The oscillation circuit 2 includes a resistor R1, a capacitor C1 and an inverter U1, the control circuit 3 includes a capacitor C2, a time base circuit IC1, an integrated circuit IC2, a PNP type triode VT1 and an NPN type triode VT2, and the temperature sensor circuit 4 includes a diode D1 and temperature sensor K1;
[0015] The first pin of the time base circuit IC1 is connected in parallel with one end of the capacitor C2, the power supply end of...
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The temperature acquisition circuit of the present invention belongs to the technical field of temperature acquisition circuits; the technical problem to be solved is: to provide a temperature acquisition circuit with an oscillation function; the technical solution adopted is: a temperature acquisition circuit, including: a power supply circuit, and an oscillation circuit , a control circuit and a temperature sensor circuit, the output end of the power supply circuit is connected to the input end of the oscillating circuit, the output end of the oscillating circuit is connected to the input end of the control circuit, and the output end of the control circuit is connected to the input end of the temperature sensor circuit Connected; suitable for power systems.
Description
technical field [0001] The temperature acquisition circuit of the invention belongs to the technical field of temperature acquisition circuits. Background technique [0002] In the circuits of small white appliances, many circuit boards have temperature sampling circuits. The use of thermistors to achieve temperature sampling has always been the way that many circuit designers and machine manufacturers are accustomed to using. However, in the traditional use of thermal In the thermistor sampling circuit, due to the different characteristics of the resistance value change of the thermistor in different temperature ranges, it is impossible to achieve a relatively accurate temperature range in the case of the same voltage divider, so for some special In products that require a wide range of display (such as some hot water boilers, dryers, etc.), if you want to use a low-cost thermistor solution to achieve, it is necessary to modify the original circuit. SUMMARY OF THE INVENTI...
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IPC IPC(8): G01K13/00
CPCG01K13/00
Inventor 钱江秦兴李建强高磊
Owner YUNCHENG POWER SUPPLY COMPANY OF STATE GRID SHANXI ELECTRIC POWER