MCU inner comparator based temperature collector and temperature collecting method
A technology of temperature collector and comparator, which is applied to thermometers, thermometers with directly heat-sensitive electric/magnetic elements, instruments, etc., can solve the problems of low precision and high cost, achieve high precision, good stability, and improve The effect of precision
Active Publication Date: 2017-06-13
CHENGDU UNIV OF INFORMATION TECH
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[0003] The temperature signal collected by the PT100 sensor is an analog signal, which needs to be converted into a digital signal to process the data through the single-chip microcomputer. The general method is to use a separate AD conversion chip, which is convenient for circuit modification, convenient and flexible to use, but low precision. ,high cost
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[0024] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention are clearly and completely described below. Apparently, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0025] The principle block diagram of the temperature collector is as follows: figure 1 As shown, the present invention is based on the high-precision temperature acquisition system of the internal comparator of the MCU. It consists of a charging circuit module, a temperature sensor module, a microprocessor module, a signal conversion module, a communication circuit module and a liquid crystal display module, and is connected to the microprocessor at the same time. modul...
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The invention provides an MCU inner comparator based temperature collector and temperature collecting method. The MCU inner comparator based temperature collector includes a charge circuit module, a temperature sensor module, a microprocessor module, a signal conversion module, a communication circuit module and a liquid crystal display module. By adopting an MCU inner comparator connected with an external charge circuit, a charge time ratio is obtained, so that voltage transferred by signals can be obtained directly. An independent A / D converter is saved skillfully and A / D conversion with precision higher than 8-bit is achieved. Unnecessary signal channels are reduced and the precision is improved. The temperature collector is high in stability and simple in circuit.
Description
technical field [0001] The invention relates to the technical field of digital signal communication, in particular to a temperature collector based on an MCU internal comparator and a temperature collection method. Background technique [0002] Temperature is a physical quantity used to measure the degree of coldness or heat of an object. Similarly, it is also one of the routine elements in ground meteorological observation. In meteorological operations, the measurement accuracy of temperature is relatively high. With the advancement of science and technology, the development of modern digital networks is becoming more and more common. The functions of temperature collection, transmission, conversion, processing and storage have also become an indispensable part of meteorological business and daily industrial production. The commonly used artificial meteorological observation method is to put the thermometer and sensor for measuring temperature into the blind box on the open...
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IPC IPC(8): G01K7/18G05B19/042
CPCG05B19/042G01K7/18Y02D10/00
Inventor 李代伟樊昌元张江林隋向阳丁晗张海清刘胤田朱毅
Owner CHENGDU UNIV OF INFORMATION TECH