Temperature measurement device
A technology of temperature measurement and measurement unit, which is applied to measurement devices, thermometers, and heat measurement, etc., can solve problems such as increasing the resource occupation of single-chip microcomputers, and achieve the effects of saving resources, saving production costs, and being convenient to use.
Inactive Publication Date: 2014-10-29
HUIZHOU EPOWER ELECTRONICS
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Problems solved by technology
If there are multiple temperatures to be detected, it must be composed of multiple detection circuits, and multiple AD ports of the single-chip microcomputer are required to read correspondingly, which increases the resource occupation of the single-chip microcomputer.
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[0020] In order to allow those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described below in conjunction with the accompanying drawings.
[0021] Such as figure 1 As shown, the present invention discloses a temperature measurement device, including a central control unit (MCU can be used, this embodiment uses MC9S08DZ32MLC single-chip microcomputer, hereinafter referred to as MCU), a temperature measurement unit connected to the MCU, and the temperature measurement unit includes an MCU. The connected voltage divider circuit unit, the channel switch circuit unit for switching the measurement channel, and one or more thermistor measurement units (including NTC and PTC) respectively connected to the voltage divider circuit unit; the channel switch circuit unit connects through the channel The pin is connected with the AD port of the MCU.
[0022] Connect the multi-channel thermistor measurement ...
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The invention discloses a temperature measurement device. The temperature measurement device comprises a central control unit, and a temperature measurement unit connected with the central control unit, wherein the temperature measurement unit comprises a voltage division circuit unit and a channel switchover circuit unit which are connected with the central control unit respectively, and one or more thermistor measurement units which are connected with the voltage division circuit unit, and the voltage division circuit unit is connected with the channel switchover circuit unit; the channel switchover circuit unit comprises one or more multi-path analogue switch units. The temperature measurement device disclosed by the invention has the following beneficial effects that: the plurality of thermistor measurement units are switched over through the channel switchover circuit unit, thus the pin occupation of a single chip can be reduced, and resources can be saved; assistance aiming at the plurality of thermistor measurement units is realized through one path of voltage division circuit unit, thus the production cost is greatly saved; the temperature measurement device is efficient and simple in structure, flexible to extend, convenient to apply, and easy to produce.
Description
technical field [0001] The invention relates to a temperature measuring device. Background technique [0002] The resistance value of NTC (NTC thermistor) changes accordingly with the change of temperature. Using the principle of resistance voltage division, when the resistance value of NTC changes, the voltage division obtained in the voltage division circuit is also different. This voltage value is passed through the microcontroller. an AD port. The AD value is read out by the microcontroller and its corresponding temperature value is calculated. If there are multiple temperatures to be detected, it must be composed of multiple detection circuits, and multiple AD ports of the single-chip microcomputer are required to read correspondingly, which increases the resource occupation of the single-chip microcomputer. Contents of the invention [0003] In order to solve the above-mentioned shortcomings of the existing battery management system, the present invention provides ...
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IPC IPC(8): G01K7/24
Inventor 刘飞文锋阮旭松王占国徐国彬
Owner HUIZHOU EPOWER ELECTRONICS