TDS water quality detector based on single chip microcomputer
A technology of water quality detection and single-chip microcomputer, which is applied in the direction of instruments, computer control, simulators, etc., can solve the problems of distortion, conductivity easily affected by temperature, etc., and achieve the effect of high precision, low cost and low cost
Inactive Publication Date: 2017-06-13
成都秉德科技有限公司
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Problems solved by technology
The water quality conductivity monitoring node device has a simple hardware circuit, high integration, and low cost. The TDS value of the water quality is tested through the conductivity data of the water; however, the conductivity is easily affected by temperature, and the TDS value of the same water quality is different at different temperatures. It should be consistent. When the temperature changes, the TDS value tested by the device has certain distortion
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Embodiment Construction
[0030] The present invention will be further described below in conjunction with the accompanying drawings.
[0031] Such as figure 1As shown, a TDS water quality detector based on a single-chip microcomputer includes a minimum system of a single-chip microcomputer, a conductivity measurement circuit 4, a display circuit 5, a temperature measurement circuit 6, and a MAX232 level conversion circuit 7.
[0032] The minimum system of single-chip microcomputer is composed of STC89C52 chip, clock circuit 2 and reset circuit 3. Since the STC89C52 chip has an oscillator circuit inside, the clock circuit 2 only needs to include a crystal oscillator X1, capacitor C1, and capacitor C2, and follow the figure 2 The capacitance of capacitor C1 and capacitor C2 is generally between 15pF and 50pF, and the capacitance of 22pF is selected in this embodiment. The main task of the clock circuit 2 is to provide a stable clock signal for the normal operation of the STC89C52 chip, and the STC89C...
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The invention discloses a TDS water quality detector based on a single chip microcomputer. The TDS water quality detector comprises a single chip microcomputer minimum system, a conductivity measurement circuit, a display circuit and further comprises a temperature measurement circuit, a MAX232 level switching circuit and a PC, the single chip microcomputer minimum system is composed of the single chip microcomputer, a clock circuit and a resetting circuit, and the temperature measurement circuit is directly connected with the single chip microcomputer U1 which is connected with the PC through the MAX232 level switching circuit. Functions of conductivity measurement, temperature compensation, TDS value measurement, key latch result and data display are realized by utilizing the single chip microcomputer; conductivity signals are collected through a probe in the conductivity measurement circuit, and the temperature measurement circuit is introduced, so that accuracy of TDS value measurement is improved; the single chip microcomputer is connected with an RS232 interface of the PC through the MAX232 level switching circuit, so that convenience is brought to storage and analysis of data.
Description
technical field [0001] The invention relates to the field of environmental detection, in particular to a TDS water quality detector based on a single-chip microcomputer. Background technique [0002] Water is the source of life, and human beings cannot do without water in production and life. With the development of social economy, the advancement of science and the improvement of people's living standards, environmental pollution is becoming more and more serious, among which, the pollution of water environment is the most serious. In today's increasingly scarce water resources, water quality issues have received more attention. Therefore, testing water quality can enable us to better protect water resources and ensure qualified water quality, which is very important for normal production, product quality and people's health. Significance. [0003] TDS is the abbreviation of total dissolved solids in English. It is interpreted as total dissolved solids in Chinese, also kn...
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IPC IPC(8): G01N27/06G05B19/042
CPCG01N27/06G05B19/0428G05B2219/2656
Inventor 金鑫
Owner 成都秉德科技有限公司