CN203732442U - Turbidity measuring instrument based on microprocessor STM32F103 - Google Patents
Turbidity measuring instrument based on microprocessor STM32F103 Download PDFInfo
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- CN203732442U CN203732442U CN201420095570.9U CN201420095570U CN203732442U CN 203732442 U CN203732442 U CN 203732442U CN 201420095570 U CN201420095570 U CN 201420095570U CN 203732442 U CN203732442 U CN 203732442U
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Abstract
The utility model provides a turbidity measuring instrument based on a microprocessor STM32F103, and relates to the field of instruments and meters. The turbidity measuring instrument comprises a host, a scattering photosensitive diode and a transmitting photosensitive diode, wherein a scattering photosensitive diode signal wire input groove and a transmitting photosensitive diode signal wire input groove are formed in the upper surface of a host casing; an LCD (liquid crystal display) screen is mounted in the front of the host casing; a 232 bus output groove is formed in one side surface of the host casing; and a master control circuit board is mounted in the host casing and comprises a microprocessor circuit, a pre-amplification circuit, a gating switching circuit, an AD (analog-to-digital) converting circuit, a 232 communication circuit and an LCD touch screen drive circuit; and the microprocessor circuit on the master control circuit board comprises the STM32F103 and peripheral circuits of the STM32F103, and the pre-amplification circuit on the master control circuit is provided with a photosensitive diode signal wire input interface. With the adoption of the turbidity measuring instrument based on the microprocessor STM32F103, correlation coefficients are all larger than 0.999 in a full measuring range, and the measurement accuracy is high.
Description
Technical field
The utility model relates to instrument field, is specially the turbidimetric apparatus based on microprocessor STM32F103.
Background technology
Turbidimetric apparatus can water-supply plant, power plant, industrial and mining enterprises, laboratory and the field test of water sample turbidity on the spot.According to ISO7027 international standard, the method for measuring turbidity can scattered light mensuration and transmitted light mensuration.Because the higher impurity of concentration in water sample and particulate can make optical signal transmissive decay more obvious, so transmitted light mensuration is applicable to measure ultra's sample.Scattered light mensuration is to measure when low, middle turbidity solution remolding sensitivity higher, and the photosignal recording between 0-200NTU is linear with turbidity value, but the linearity is just poor in the time of the high turbidity solution of measurement.
In order to have overcome the defect that single-measurement method exists, the utility model has designed the turbidimetric apparatus of a high precision, wide-range.This turbidimetric apparatus combines scattering method and transmission beam method, the limited drawback of measurement range while having overcome independent use scattering method or transmission beam method, and improved the precision of measuring.
Summary of the invention
The purpose of this utility model is to provide the turbidimetric apparatus based on microprocessor STM32F103, this turbidimetric apparatus is taking the STM32F103 microprocessor of ST Microelectronics and μ C/OS-II operating system as platform, scattering method and transmission beam method are combined, improve the precision of measuring, adopt native system within the scope of gamut, its related coefficient all reaches more than 0.999, and measuring accuracy is high.
The technical solution of the utility model:
Based on the turbidimetric apparatus of microprocessor STM32F103, described device comprises main frame, scattering photodiode, transmission photodiode, host housing top is provided with scattering photodiode signal wire input groove, transmission photodiode signal wire input groove, the front of host housing is equipped with a LCD touch-screen, one of them side of host housing is equipped with 232 bus output grooves, main control board is housed in host housing, this main control board is by microcontroller circuit, pre-amplification circuit, gating circuit switch, A/D convertor circuit, 232 telecommunication circuits and LCD driving circuit composition, microcontroller circuit on main control board is made up of STM32F103 and peripheral circuit thereof, pre-amplification circuit on this main control board is provided with 2 photodiode signal wire input interfaces, 1 is scattering photodiode signal wire input interface, be connected with scattering photodiode by scattering photodiode signal wire, this scattering photodiode signal wire input interface is positioned at the scattering photodiode signal wire input groove of host housing top, 1 is transmission photodiode signal wire input interface, be connected with transmission photodiode by transmission photodiode signal wire, this transmission photodiode signal wire input interface is positioned at the transmission photodiode signal wire input groove of host housing top.
The described turbidimetric apparatus based on microprocessor STM32F103,232 telecommunication circuits on described main control board are provided with 1 232 bus output interface, be connected with computer by 232 buses, this 232 bus output interface is positioned at 232 bus output grooves of host housing side.
The described turbidimetric apparatus based on microprocessor STM32F103, the LCD driving circuit on described main control board is provided with a LCD touch screen interface, is connected with the LCD touch-screen in host housing front.
The described turbidimetric apparatus based on microprocessor STM32F103, described main control board is made up of microcontroller circuit, pre-amplification circuit, gating circuit switch, A/D convertor circuit, 232 telecommunication circuits and LCD driving circuit.
The described turbidimetric apparatus based on microprocessor STM32F103, described microcontroller circuit is made up of microprocessor STM32F103 and peripheral circuit thereof, pre-amplification circuit is made up of operational amplifier A D8639 chip and peripheral circuit thereof, and gating circuit switch is made up of gating switch CM303 chip and peripheral circuit thereof.
The described turbidimetric apparatus based on microprocessor STM32F103, described A/D convertor circuit is made up of AD conversion chip AD7667 and peripheral circuit thereof, 232 telecommunication circuits are made up of 232 communication chip MAX232 and peripheral circuit thereof, and LCD driving circuit drives chip RA8875 and peripheral circuit thereof to form by LCD touch-screen.
The utlity model has following advantage:
1, native system combines scattering method and transmission beam method, the limited drawback of measurement range while having overcome independent use scattering method or transmission beam method, and improved range and the precision measured.
2, the sensor of this turbidimetric apparatus is immersion sensor, when use, only probe need be dropped into water sample to be measured, measures efficient and convenient.
Brief description of the drawings
Fig. 1 is the utility model system wiring diagram;
Fig. 2 is the utility model main machine structure schematic diagram;
Fig. 3 is the utility model host circuit schematic diagram.
Embodiment
Annex in figure: 1 is scattering photodiode, 2 is scattering photodiode signal wire, 3 is transmission photodiode, 4 is transmission photodiode signal wire, 5 is main frame, and 6 is transmission photodiode signal wire input groove, and 7 is scattering photodiode signal wire input groove, 8 is LCD touch-screen, and 9 is 232 bus output grooves.
Based on the turbidimetric apparatus of microprocessor STM32F103, comprise main frame, scattering photodiode, transmission photodiode.Main frame has 1 rectangular shell, above host housing, be provided with 1 scattering photodiode signal wire input groove, 1 transmission photodiode signal wire input groove, be equipped with a LCD touch-screen in the front of host housing, be equipped with 232 bus output grooves in one of them side of host housing.1 main control board is housed in host housing, and this main control board is made up of microcontroller circuit, pre-amplification circuit, gating circuit switch, A/D convertor circuit, 232 telecommunication circuits and LCD driving circuit.Microcontroller circuit on this main control board is made up of STM32F103 and peripheral circuit thereof, be responsible for conversion, the gating switch of sensing data control, LCD driving circuit control with carry out 232 with computer and communicate by letter.Pre-amplification circuit on this main control board is provided with 2 photodiode signal wire input interfaces, 1 is scattering photodiode signal wire input interface, be connected with scattering photodiode by scattering photodiode signal wire, this scattering photodiode signal wire input interface is positioned at the scattering photodiode signal wire input groove of host housing top, 1 is transmission photodiode signal wire input interface, be connected with transmission photodiode by transmission photodiode signal wire, this transmission photodiode signal wire input interface is positioned at the transmission photodiode signal wire input groove of host housing top, the signal that this pre-amplification circuit is responsible for scattering photodiode and transmission photodiode to collect amplifies.Gating circuit switch on this main control board receives the control of STM32F103, is responsible for switching scattering photodiode signal and projection photodiode signal.The photodiode signal that A/D convertor circuit on this main control board is responsible for gating circuit switch to send here carries out AD conversion, and the simulating signal of photodiode is converted to digital signal, gives microprocessor STM32F103 and processes.232 telecommunication circuits on this main control board are provided with 1 232 bus output interface, are connected with computer by 232 buses, and this 232 bus output interface is positioned at 232 bus output grooves of host housing side.LCD driving circuit on this main control board is provided with a LCD touch screen interface, is connected with the LCD touch-screen in host housing front, is responsible for the demarcation of turbidity and the real-time demonstration of turbidity.
Main control board is made up of microcontroller circuit, pre-amplification circuit, gating circuit switch, A/D convertor circuit, 232 telecommunication circuits and LCD driving circuit.Microcontroller circuit is made up of microprocessor STM32F103 and peripheral circuit thereof, is responsible for the control of conversion, demonstration and the whole system of parameter.Pre-amplification circuit is made up of operational amplifier A D8639 chip and peripheral circuit thereof, and the signal of being responsible for scattering photodiode and transmission photodiode to collect amplifies.Gating circuit switch by gating switch CM303 chip extremely peripheral circuit form, be responsible for switching scattering photodiode signal and projection photodiode signal.A/D convertor circuit is made up of AD conversion chip AD7667 and peripheral circuit thereof, is responsible for the simulating signal of photodiode to be converted to digital signal.232 telecommunication circuits are made up of 232 communication chip MAX232 and peripheral circuit thereof, are responsible for communicating with computer, and the turbidity collecting is sent to computer.LCD driving circuit drives chip RA8875 and peripheral circuit thereof to form by LCD touch-screen, is responsible for the collection of contact and the demonstration of LCD.
First, by touch-screen, system is demarcated, calibrate the magnitude of voltage of turbidity in the time of 200NTU.Then, system is carried out AD conversion to scattering photodiode signal and transmission photodiode signal respectively, according to transformation result, determines corresponding turbidity detection method.When turbidity is in 0-200NTU interval, adopt scattered light mensuration to carry out turbidimetry, turbidity and scattered light voltage signal are linear, now, directly convert magnitude of voltage to turbidity value; When turbidity is in 200-1000NTU interval, adopt transmitted light mensuration to carry out turbidimetry, turbidity and transmitted light voltage signal are exponential relationship, now, adopt look-up table to obtain its turbidity value.
Embodiment 1:
See Fig. 1, Fig. 2, a kind of turbidimetric apparatus based on microprocessor STM32F103, comprises main frame 5, scattering photodiode 1, transmission photodiode 3.Main frame 5 has 1 rectangular shell, above main frame 5 shells, be provided with 7,1 transmission photodiode signal wire input groove 6 of 1 scattering photodiode signal wire input groove, be equipped with a LCD touch-screen 8 in the front of host housing, be equipped with 232 bus output grooves 9 in one of them side of host housing.1 main control board is housed in host housing, and this main control board is made up of microcontroller circuit, pre-amplification circuit, gating circuit switch, A/D convertor circuit, 232 telecommunication circuits and LCD driving circuit.Microcontroller circuit on this main control board is made up of STM32F103 and peripheral circuit thereof, be responsible for conversion, the gating switch of sensing data control, LCD driving circuit control with carry out 232 with computer and communicate by letter.Pre-amplification circuit on this main control board is provided with 2 photodiode signal wire input interfaces, 1 is scattering photodiode signal wire input interface, be connected with scattering photodiode 1 by scattering photodiode signal wire 2, this scattering photodiode signal wire input interface is positioned at scattering photodiode signal wire input groove 7 places of host housing top, 1 is transmission photodiode signal wire input interface, be connected with transmission photodiode 3 by transmission photodiode signal wire 4, this transmission photodiode signal wire input interface is positioned at transmission photodiode signal wire input groove 6 places of host housing top, the signal that this pre-amplification circuit is responsible for scattering photodiode and transmission photodiode to collect amplifies.Gating circuit switch on this main control board receives the control of STM32F103, is responsible for switching scattering photodiode signal and projection photodiode signal.The photodiode signal that A/D convertor circuit on this main control board is responsible for gating circuit switch to send here carries out AD conversion, and the simulating signal of photodiode is converted to digital signal, gives microprocessor STM32F103 and processes.232 telecommunication circuits on this main control board are provided with 1 232 bus output interface, are connected with computer by 232 buses, and this 232 bus output interface is positioned at 232 bus output groove 9 places of host housing side.LCD driving circuit on this main control board is provided with a LCD touch screen interface, is connected with the LCD touch-screen 8 in host housing front, is responsible for the demarcation of turbidity and the real-time demonstration of turbidity.
Claims (6)
1. the turbidimetric apparatus based on microprocessor STM32F103, it is characterized in that, described device comprises main frame, scattering photodiode, transmission photodiode, host housing top is provided with scattering photodiode signal wire input groove, transmission photodiode signal wire input groove, the front of host housing is equipped with a LCD touch-screen, one of them side of host housing is equipped with 232 bus output grooves, main control board is housed in host housing, this main control board is by microcontroller circuit, pre-amplification circuit, gating circuit switch, A/D convertor circuit, 232 telecommunication circuits and LCD driving circuit composition, microcontroller circuit on main control board is made up of STM32F103 and peripheral circuit thereof, pre-amplification circuit on this main control board is provided with 2 photodiode signal wire input interfaces, 1 is scattering photodiode signal wire input interface, be connected with scattering photodiode by scattering photodiode signal wire, this scattering photodiode signal wire input interface is positioned at the scattering photodiode signal wire input groove of host housing top, 1 is transmission photodiode signal wire input interface, be connected with transmission photodiode by transmission photodiode signal wire, this transmission photodiode signal wire input interface is positioned at the transmission photodiode signal wire input groove of host housing top.
2. the turbidimetric apparatus based on microprocessor STM32F103 according to claim 1, it is characterized in that, 232 telecommunication circuits on described main control board are provided with 1 232 bus output interface, be connected with computer by 232 buses, this 232 bus output interface is positioned at 232 bus output grooves of host housing side.
3. the turbidimetric apparatus based on microprocessor STM32F103 according to claim 2, is characterized in that, the LCD driving circuit on described main control board is provided with a LCD touch screen interface, is connected with the LCD touch-screen in host housing front.
4. the turbidimetric apparatus based on microprocessor STM32F103 according to claim 3, it is characterized in that, described main control board is made up of microcontroller circuit, pre-amplification circuit, gating circuit switch, A/D convertor circuit, 232 telecommunication circuits and LCD driving circuit.
5. the turbidimetric apparatus based on microprocessor STM32F103 according to claim 1, it is characterized in that, described microcontroller circuit is made up of microprocessor STM32F103 and peripheral circuit thereof, pre-amplification circuit is made up of operational amplifier A D8639 chip and peripheral circuit thereof, and gating circuit switch is made up of gating switch CM303 chip and peripheral circuit thereof.
6. the turbidimetric apparatus based on microprocessor STM32F103 according to claim 1, it is characterized in that, described A/D convertor circuit is made up of AD conversion chip AD7667 and peripheral circuit thereof, 232 telecommunication circuits are made up of 232 communication chip MAX232 and peripheral circuit thereof, and LCD driving circuit drives chip RA8875 and peripheral circuit thereof to form by LCD touch-screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420095570.9U CN203732442U (en) | 2014-03-03 | 2014-03-03 | Turbidity measuring instrument based on microprocessor STM32F103 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420095570.9U CN203732442U (en) | 2014-03-03 | 2014-03-03 | Turbidity measuring instrument based on microprocessor STM32F103 |
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| CN203732442U true CN203732442U (en) | 2014-07-23 |
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| CN201420095570.9U Expired - Fee Related CN203732442U (en) | 2014-03-03 | 2014-03-03 | Turbidity measuring instrument based on microprocessor STM32F103 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107907506A (en) * | 2017-11-08 | 2018-04-13 | 华东师范大学 | A kind of measuring device and method of wide-range and dynamic optimum resolution measurement silt content |
| CN109883997A (en) * | 2019-02-01 | 2019-06-14 | 中国海洋大学 | A kind of high-precision intelligent turbidity detection device and its scaling method and application method |
-
2014
- 2014-03-03 CN CN201420095570.9U patent/CN203732442U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107907506A (en) * | 2017-11-08 | 2018-04-13 | 华东师范大学 | A kind of measuring device and method of wide-range and dynamic optimum resolution measurement silt content |
| CN109883997A (en) * | 2019-02-01 | 2019-06-14 | 中国海洋大学 | A kind of high-precision intelligent turbidity detection device and its scaling method and application method |
| CN109883997B (en) * | 2019-02-01 | 2020-07-03 | 中国海洋大学 | High-precision intelligent turbidity detection device and calibration method and use method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140723 Termination date: 20150303 |
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| EXPY | Termination of patent right or utility model |