CN104122376B - A kind of multiparameter water quality analyzer - Google Patents

A kind of multiparameter water quality analyzer Download PDF

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CN104122376B
CN104122376B CN201410304335.2A CN201410304335A CN104122376B CN 104122376 B CN104122376 B CN 104122376B CN 201410304335 A CN201410304335 A CN 201410304335A CN 104122376 B CN104122376 B CN 104122376B
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resistance
module
electric capacity
diode
connects
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CN104122376A (en
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孙永健
曹洋
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Nantong Essen Sensing Technology Co. Ltd.
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Nanjing Lingxian Environmental Protection Technology Co Ltd
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Abstract

The invention discloses a kind of multiparameter water quality analyzer, comprise hand held controller and at least one intelligence sensor, wherein hand held controller comprises battery, battery management module, display module, the one DC/DC module, the 2nd DC/DC module, the first central processing unit, keyboard and the first A/D interface, each intelligence sensor comprises the second central processing unit, the 3rd DC/DC module, the second A/D interface, reference voltage source, signal acquisition module and sensor, the present invention is provided with multiple sensors, can be to the PH in water, OPR, electrical conductivity, the parameters such as dissolved oxygen content detect, water quality is comprehensively detected, more accurately water quality is judged, test section and observation part are separated, user need not be confined to water quality detection place, can in limited scope, observe the water quality parameter of detection by hand held controller simultaneously, be provided with rechargeable battery, do not need external power supply normally to work, facilitate instrument application in remote water quality detection place.

Description

A kind of multiparameter water quality analyzer
Technical field
The invention belongs to water analysis technical field, be specifically related to a kind of multiparameter water quality analyzer.
Background technology
The mankind be unable to do without water in life and activity in production, and quality and the human health of Drinking Water water quality are closely related. Along with the raising of socio-economic development, scientific progress and living standards of the people, people improve constantly the water quality requirement of Drinking Water, also development and perfect correspondingly of water quality standard for drinking water. Because the many factors such as the formulation of Drinking Water water standard and people's habits and customs, culture, economic condition, scientific technological advance level, water resource and water quality present situation thereof are relevant, not only between various countries, and between the different regions of same country, the requirement of drinking water quality is all existed to difference. Water is Source of life. Drinking water safety concerns body health of people and life security, must pay close attention and practical guarantee. In the morning on June 28th, 2012, the 27 the meeting grouping of 11 Standing Committee of the National People's Congress has been reviewed State Council about the report that ensures drinking water safety working condition. Participant committee member just strengthens water head site ecological protection and compensation, accelerates water supply network Facilities Construction and renewal, and refinement water standard, raising water-use efficiency, guarantee that the problems such as urban residents' drinking water safety propose much penetrating and correct judgement. About Water quality detected, specific requirement is proposed.
In order to protect water environment, must strengthen the monitoring to sewage discharge. The design of test point and instrumentation are mainly that the quality of Water Test Kits plays vital effect to monitoring water environment. Measure the content of various chemical compositions in water with chemistry and physical method. Water Test Kits is divided into simple analysis, complete analysis and special project and analyzes three kinds. Letter is analyzed and is carried out in the wild, and analysis project is few, but will seek quickness and in time, and the project of the special analysis of the main chemical compositions of underground water in each water-bearing layer that is applicable to tentatively understand large area within the scope of is determined according to the needs of specific tasks. Separately have full automatic ion analyzer qualitative and quantitative analysis fast and accurately, and can be automatically, intellectuality, real-time online, multi-parameter analyze simultaneously.
Water Test Kits mainly adopts ion-selective electrode mensuration to realize accurate detection. Electrode on instrument: PH, fluorine, sodium, potassium, calcium, magnesium and reference electrode. Each electrode has an ion-selective membrane, can produce and react with corresponding ion in tested sample, and film is an ion-exchanger, reacts and changed membrane potential with ionic charge, just can detect liquid, sample and intermembranous electromotive force. Two potential difference values meeting generation currents that film both sides are detected, sample, reference electrode, reference electrode liquid forms " loop " on one side, film, internal electrode liquid, internal electrode is another side.
Ion concentration missionary society between internal electrode liquid and sample produces electrochemical voltage on the film both sides of working electrode, and voltage is guided to amplifier by the internal electrode of high conductance, and reference electrode is guided to the place of amplifier equally. Obtain calibration curve by the standard liquid that detects an accurate known ion concentration, thereby detect the ion concentration in sample.
Existing Water Test Kits be mostly for water in various ions detect, analyze the concentration of the various ions in water quality, thereby draw the situation of water quality, but the parameter that existing Water Test Kits is analyzed is limited, can not comprehensively detect water quality, also cannot effectively judge water quality, as: dissolved oxygen, PH, ORP(oxidation-reduction potential), electrical conductivity (salinity, resistance), the parameters such as temperature, can not comprehensively detect, the more comprehensive Water Test Kits of existing function ratio can exist bulky simultaneously, be not easy to the shortcoming of carrying and detecting, the existing Water Test Kits life-span is not long simultaneously, can not reach the effect of permanent use, be unfavorable for cycle utilization, in addition, existing Water Test Kits can only be read or be carried out data by terminal and read by the screen of instrument, has limited user's action, and existing Water Test Kits can not produce the detection signal of standard simultaneously.
Summary of the invention
Technical problem to be solved by this invention is: for the defect of prior art, a kind of multiparameter water quality analyzer is provided, be provided with multiple sensors, can detect parameters such as the PH in water, OPR, electrical conductivity, dissolved oxygen contents, water quality is comprehensively detected, more accurately water quality is judged; Test section and observation part are separated, user need not be confined to water quality detection place, can in limited scope, observe the water quality parameter of detection by hand held controller, more convenient to use simultaneously; The present invention has modern design, simple structure, and volume is little, and portable advantage has not only increased the parameter of water analysis, and is provided with rechargeable battery, does not need external power supply normally to work, and facilitates instrument application in remote water quality detection place.
The present invention is for solving the problems of the technologies described above by the following technical solutions:
A kind of multiparameter water quality analyzer, comprises hand held controller and at least one intelligence sensor, and wherein hand held controller comprises battery, battery management module, display module, the one DC/DC module, the 2nd DC/DC module, the first central processing unit, keyboard and the first A/D interface, each intelligence sensor comprises the second central processing unit, the 3rd DC/DC module, the second A/D interface, reference voltage source, signal acquisition module and sensor, wherein the first central processing unit respectively with display module, keyboard, the 2nd DC/DC module, the first A/D interface, the second A/D interface is connected, wherein display module is also connected with the first A/D interface, the first A/D interface is also connected with the second A/D interface, the 2nd DC/DC module is also connected with battery management module, battery management module is also connected with a DC/DC module with battery respectively, the one DC/DC module is also connected with the 3rd DC/DC module, and the 3rd DC/DC module is connected with the second central processing unit with reference voltage source respectively, signal acquisition module respectively with the second central processing unit, sensor is connected with the second module interface, and central processing unit is also connected with the second A/D interface,
Battery management module is carried out management of charging and discharging to battery, battery is respectively a DC/DC module and DC/DC module for power supply by battery management module, the one DC/DC module and the 2nd DC/DC module convert respectively the power supply of battery to first central processing unit, the 3rd DC/DC module and the needed voltage of reference voltage source, the voltage of generation is supplied with the second central processing unit and reference voltage source by the 3rd DC/DC module, the voltage transitions that reference voltage source provides the 3rd DC/DC module becomes signal acquisition module required voltage, gathered micro-signal is sent to signal acquisition module by sensor, the micro-signal that reference voltage source is received signal acquisition module sends to the second central processing unit after converting voltage signal to, the second central processing unit passes through to control the second A/D interface output digit signals and analog signal respectively by the voltage signal of receiving, the data signal of the second A/D interface output sends to the first central processing unit after the first A/D interface receives, the A/D Sampling Interface of the first central processing unit receives the analog signal of the second A/D interface output, the first central processing unit converts the analog signal of receiving and data signal to the contrasting data of measured parameter, and send to display module to show.
As further prioritization scheme of the present invention, also comprise signal amplification module, the output of sensor is connected with the input of signal amplification module, the output of signal amplification module is connected with the input of signal acquisition module, signal amplification module comprises the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the first electric capacity, the second electric capacity, the first diode, the second diode, the 3rd diode, the 4th diode, the 5th diode, the first amplifier and the second amplifier,
One end of described the 12 resistance connects respectively one end of the 9th resistance, one end of the tenth resistance, the inverting input of the first amplifier;
The other end of described the 9th resistance connects one end of the second electric capacity, and the other end of described the second electric capacity connects respectively the other end of the tenth resistance, the output of the first amplifier, one end of the 4th resistance;
The normal phase input end of the first amplifier connects one end of the 11 resistance, the other end ground connection of described the 11 resistance;
The other end of described the 4th resistance connects respectively one end of the 3rd resistance, the inverting input of the second amplifier;
The other end of described the 3rd resistance connects respectively one end of the second resistance, the output of the second amplifier;
The normal phase input end of the second amplifier connects one end of the 5th resistance, the other end of described the 5th resistance is the sliding end of slide rheostat respectively, one end of described slide rheostat connects one end of the 6th resistance, the anode of the 5th diode, and the other end of described the 6th resistance connects the minus earth of dc source, described the 5th diode;
The other end of described slide rheostat connects respectively the negative electrode of the 4th diode, one end of the 8th resistance, the plus earth of described the 4th diode, another termination dc source of described the 8th resistance;
The other end of described the second resistance connects respectively one end of the first electric capacity, the anode of the second diode, the negative electrode of the 3rd diode, the other end ground connection of described the first electric capacity, the plus earth of described the 3rd diode, the negative electrode of described the second diode connect respectively one end of the first resistance, the negative electrode of the first diode, another termination dc source of described the first resistance, the plus earth of described the first diode.
As further prioritization scheme of the present invention, the second A/D interface comprises chip MAX3458 and chip AD5410, the data that chip MAX3458 sends central processing unit are converted to data signal, and the data that chip AD5410 sends central processing unit are converted to analog signal.
As further prioritization scheme of the present invention, described chip AD5410 forms signaling conversion circuit, and this change-over circuit comprises the 13 resistance, the 14 resistance, the 15 resistance, the 16 resistance, the 17 resistance, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, the 7th electric capacity, the 8th electric capacity, the 9th electric capacity, the 7th diode, moment twin zener dioder, conversion chip, triode;
Described the 13 resistance one end be connected with the second pin of conversion chip, the other end of described the 13 resistance connects the 3rd pin of conversion chip;
The 6th pin of described conversion chip connects one end of the 14 resistance, the other end ground connection of described the 14 resistance;
The 24 pin of described conversion chip connects respectively one end of the 3rd electric capacity, one end of the 4th electric capacity, one end of the 7th electric capacity, one end of the 8th electric capacity, the other end of described the 3rd electric capacity connects the 22 pin of conversion chip, the other end of described the 4th electric capacity connects the 21 pin of conversion chip, the other end of described the 7th electric capacity, the equal ground connection of the other end of the 8th electric capacity;
The colelctor electrode of the 20 pin connecting triode of described conversion chip, the base stage of described triode connects one end of the 16 resistance, the other end of described the 16 resistance connects respectively the 19 pin of conversion chip, one end of the 17 resistance, one end of the 6th electric capacity
The other end ground connection of described the 6th electric capacity, the emitter stage of the other end difference connecting triode of described the 17 resistance, the anode of the 7th diode;
The negative electrode of described diode connect respectively the 9th electric capacity one end, moment twin zener dioder one end, the other end of described the 9th electric capacity, moment twin zener dioder the equal ground connection of the other end;
The 15 pin of described conversion chip, the 14 pin are all connected with one end of the 5th electric capacity, the other end ground connection of described the 5th electric capacity;
The 13 pin of described conversion chip connects one end of the 15 resistance, the other end ground connection of described the 15 resistance.
As further prioritization scheme of the present invention, the chip model that described battery management module adopts is BQ24026, and the chip model that a described DC/DC module adopts is SP6650, produces the DC voltage of 3.3V; The chip model that described the 2nd DC/DC module adopts is LM2577, and produces the DC voltage of 12V.
As further prioritization scheme of the present invention, the chip model that described reference voltage source adopts is TL431, and produces the DC voltage of 2.5V.
As further prioritization scheme of the present invention, described reference voltage source is connected with the second central processing unit by spi bus.
As further prioritization scheme of the present invention, signal acquisition module comprises chip LM91200 and gathers resistance.
As further prioritization scheme of the present invention, the voltage range of described analog signal is 4mV-20mV.
The present invention adopts above technical scheme compared with prior art, has following technique effect:
The first, the present invention is provided with multiple sensors, can detect parameters such as the PH in water, OPR, electrical conductivity, dissolved oxygen contents, and water quality is comprehensively detected, and more accurately water quality is judged;
The second, the present invention separates test section and observation part, and user need not be confined to water quality detection place, can in limited scope, observe the water quality parameter of detection by hand held controller, more convenient to use;
Three, the present invention has modern design, simple structure, and volume is little, and portable advantage has not only increased the parameter of water analysis, and is provided with rechargeable battery, does not need external power supply normally to work, and facilitates instrument application in remote water quality detection place.
Brief description of the drawings
Fig. 1 is circuit module schematic diagram of the present invention;
Fig. 2 is the circuit structure diagram of signal amplification module of the present invention;
R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, C1, C1, D1, D2, D3, D4, D5, U1, U2 represents respectively the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the first electric capacity, the second electric capacity, the first diode, the second diode, the 3rd diode, the 4th diode, the 5th diode, the first amplifier and the second amplifier,
Fig. 3 is the structure chart of signaling conversion circuit of the present invention;
R13, R14, R15, R16, R17, C3, C4, C5, C6, C7, C8, C9, D7, D8, U3, Q1 represent respectively the 13 resistance, the 14 resistance, the 15 resistance, the 16 resistance, the 17 resistance, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, the 7th electric capacity, the 8th electric capacity, the 9th electric capacity, the 7th diode, moment twin zener dioder, conversion chip, triode.
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:
The present invention discloses a kind of multiparameter water quality analyzer, as shown in Figure 1, comprises hand held controller and intelligence sensor, and wherein hand held controller comprises battery, battery management module, display module, the one DC/DC module, the 2nd DC/DC module, the first central processing unit, keyboard and the first A/D interface, intelligence sensor comprises the second central processing unit, the 3rd DC/DC module, the second A/D interface, reference voltage source, signal acquisition module and sensor, wherein the first central processing unit respectively with display module, keyboard, the 2nd DC/DC module, the first A/D interface, the second A/D interface is connected, wherein display module is also connected with the first A/D interface, the first A/D interface is also connected with the second A/D interface, the 2nd DC/DC module is also connected with battery management module, battery management module is also connected with a DC/DC module with battery respectively, the one DC/DC module is also connected with the 3rd DC/DC module, and the 3rd DC/DC module is connected with the second central processing unit with reference voltage source respectively, signal acquisition module respectively with the second central processing unit, sensor is connected with the second module interface, and central processing unit is also connected with the second A/D interface,
Battery management module adopts BQ24026 chip, and battery management module is carried out management of charging and discharging to battery, and this chip charging current is large, and maximum can reach 500mA, and the charging interval is short, has ensured service time and the service life of this multiparameter water quality analyzer.
Battery is respectively a DC/DC module and DC/DC module for power supply by battery management module, the chip model that a described DC/DC module adopts is SP6650, produce the DC voltage of 12V, the chip model that described the 2nd DC/DC module adopts is LM2577, and produce the DC voltage of 3.3V, the one DC/DC module converts the power supply of battery to the 3rd DC/DC module and the needed voltage of reference voltage source, the 2nd DC/DC module converts the power supply of battery to the first central processing unit needed voltage, the voltage of generation is supplied with the second central processing unit and reference voltage source by the 3rd DC/DC module, described reference voltage source is connected with the second central processing unit by spi bus, the chip model that reference voltage source adopts is TL431, the voltage that reference voltage source provides the 3rd DC/DC module transfers the DC voltage of 2.5V to, as signal acquisition module required voltage.
Sensor has multiple, adopts temperature sensor, pH detector, ORP behavior detector, electrical conductivity detection module, dissolved oxygen to detect, and temperature sensor adopts thermistor to detect.
Temperature sensor adopts PT10000, is to use warming device more widely.
Gathered micro-signal is sent to signal acquisition module by sensor, the micro-signal that reference voltage source is received signal acquisition module sends to the second central processing unit after converting voltage signal to, the second central processing unit passes through to control the second A/D interface output digit signals and analog signal respectively by the voltage signal of receiving, the data signal of the second A/D interface output sends to the first central processing unit after the first A/D interface receives, the A/D Sampling Interface of the first central processing unit receives the analog signal of the second A/D interface output, the first central processing unit converts the analog signal of receiving and data signal to the contrasting data of measured parameter, and send to display module to show.
Each intelligence sensor comprises a sensor, and after being processed, the signal of this sensor sends to hand held controller analysis, hand held controller and intelligence sensor are two independently structures, connect by A/D interface each other, carry out transfer of data, user when in use, has gathered after data at intelligence sensor, hand held controller can be plugged on and on intelligence sensor, receive data.
PH detects and adopts glass electrode method to detect, the Acidity of Aikalinity of test water body, there is the function of having automatic temp compensating, can be applicable in the systems such as water treatment or water quality monitoring, cooling tower and boiler protection, aquarium water treatment system, swimming pool and hot spring, measurement category is at 0.00-14.00PH, and resolution ratio is 0.01PH;
The detection of ORP characteristic adopts platinum electrode method, for the oxidation-reduction quality of test solution, share reference electrode with PH motor, measurement category is-1999.99mv-1999.99mv, resolution ratio is 0.01mv, conductivity characteristic also adopts platinum electrode method, corrosion-resistant, can automatically be scaled salinity and resistance value by accompanying software; Can be applicable to Pure water preparation: the fields such as counter-infiltration, deionization, distillation, boiler blow-down water, semiconductor pure water preparation, washings monitoring and control, salimity measurement, chemicals concentrate, cleaning agent is concentrated;
Dissolved oxygen adopts polarogram type film covering type, has ground total moisture content compensate function, can carry out zero oxygen calibration, full scale calibration etc., is applied in the systems such as aquaculture, water/sewage disposal, environmental monitoring, biological respinse, Production of Wine.
The first central processing unit adopts STM32F103CB, with clock, reset and power management, power and I/O pin for 2.0~3.6 volts, (POR/PDR) powers on/power-off restoration, programmable voltage monitor (PVD), 4~16MHz crystal oscillator, the RC oscillator of the embedded 8MHz through the adjustment of dispatching from the factory, the RC oscillator of the 40kHz of interior band calibration, produce the PLL of cpu clock, with the 32kHzRTC oscillator of calibration function, low-power consumption simultaneously: sleep, shut down and standby mode, VBAT is RTC and backing register power supply, by scan mode reading out data, can the required type that is attached thereto sensor of self-induction, a key calibration function carries out calibrate to institute's connecting sensor simultaneously, other functions have the low prompting of battery electric quantity, length is pressed power key switching on and shutting down, prevent maloperation.
The second central processing unit adopts C8051F350,
Signal acquisition module adopts LM91200 and gathers resistance and signal gathered simultaneously, and LM91200 is with the function of mV signal and resistance signal collection.
The second A/D interface comprises chip MAX3458 and chip AD5410, and the data that chip MAX3458 sends central processing unit are converted to data signal, and the data that chip AD5410 sends central processing unit are converted to analog signal.
What the display module in hand held controller adopted is industrial graphic dot matrix screen, be 128 × 64 dot matrix type LCD MODULEs, be provided with the interface being connected with CPU, there are 8 normal data buses, article 6, control line and power line, and there is backlight control, can ensure to show visible situation decline low-power consumption; In the control of display module, adopt the method for whole screen read-write, effectively avoid showing between half screen the problem of dislocation and frequent brush stroboscopic screen.
As further prioritization scheme of the present invention, also comprise signal amplification module, the output of sensor is connected with the input of signal amplification module, the output of signal amplification module is connected with the input of signal acquisition module, signal amplification module comprises the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the first electric capacity, the second electric capacity, the first diode, the second diode, the 3rd diode, the 4th diode, the 5th diode, the first amplifier and the second amplifier,
One end of described the 12 resistance connects respectively one end of the 9th resistance, one end of the tenth resistance, the inverting input of the first amplifier;
The other end of described the 9th resistance connects one end of the second electric capacity, and the other end of described the second electric capacity connects respectively the other end of the tenth resistance, the output of the first amplifier, one end of the 4th resistance;
The normal phase input end of the first amplifier connects one end of the 11 resistance, the other end ground connection of described the 11 resistance;
The other end of described the 4th resistance connects respectively one end of the 3rd resistance, the inverting input of the second amplifier;
The other end of described the 3rd resistance connects respectively one end of the second resistance, the output of the second amplifier;
The normal phase input end of the second amplifier connects one end of the 5th resistance, the other end of described the 5th resistance is the sliding end of slide rheostat respectively, one end of described slide rheostat connects one end of the 6th resistance, the anode of the 5th diode, and the other end of described the 6th resistance connects the minus earth of dc source, described the 5th diode;
The other end of described slide rheostat connects respectively the negative electrode of the 4th diode, one end of the 8th resistance, the plus earth of described the 4th diode, another termination dc source of described the 8th resistance;
The other end of described the second resistance connects respectively one end of the first electric capacity, the anode of the second diode, the negative electrode of the 3rd diode, the other end ground connection of described the first electric capacity, the plus earth of described the 3rd diode, the negative electrode of described the second diode connect respectively one end of the first resistance, the negative electrode of the first diode, another termination dc source of described the first resistance, the plus earth of described the first diode.
As further prioritization scheme of the present invention, the second A/D interface comprises chip MAX3458 and chip AD5410, the data that chip MAX3458 sends central processing unit are converted to data signal, and the data that chip AD5410 sends central processing unit are converted to analog signal.
As further prioritization scheme of the present invention, described chip AD5410 forms signaling conversion circuit, and this change-over circuit comprises the 13 resistance, the 14 resistance, the 15 resistance, the 16 resistance, the 17 resistance, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, the 7th electric capacity, the 8th electric capacity, the 9th electric capacity, the 7th diode, moment twin zener dioder, conversion chip, triode;
Described the 13 resistance one end be connected with the second pin of conversion chip, the other end of described the 13 resistance connects the 3rd pin of conversion chip;
The 6th pin of described conversion chip connects one end of the 14 resistance, the other end ground connection of described the 14 resistance;
The 24 pin of described conversion chip connects respectively one end of the 3rd electric capacity, one end of the 4th electric capacity, one end of the 7th electric capacity, one end of the 8th electric capacity, the other end of described the 3rd electric capacity connects the 22 pin of conversion chip, the other end of described the 4th electric capacity connects the 21 pin of conversion chip, the other end of described the 7th electric capacity, the equal ground connection of the other end of the 8th electric capacity;
The colelctor electrode of the 20 pin connecting triode of described conversion chip, the base stage of described triode connects one end of the 16 resistance, the other end of described the 16 resistance connects respectively the 19 pin of conversion chip, one end of the 17 resistance, one end of the 6th electric capacity
The other end ground connection of described the 6th electric capacity, the emitter stage of the other end difference connecting triode of described the 17 resistance, the anode of the 7th diode;
The negative electrode of described diode connect respectively the 9th electric capacity one end, moment twin zener dioder one end, the other end of described the 9th electric capacity, moment twin zener dioder the equal ground connection of the other end;
The 15 pin of described conversion chip, the 14 pin are all connected with one end of the 5th electric capacity, the other end ground connection of described the 5th electric capacity;
The 13 pin of described conversion chip connects one end of the 15 resistance, the other end ground connection of described the 15 resistance.
As further prioritization scheme of the present invention, the chip model that described battery management module adopts is BQ24026, and the chip model that a described DC/DC module adopts is SP6650, produces the DC voltage of 3.3V; The chip model that described the 2nd DC/DC module adopts is LM2577, and produces the DC voltage of 12V.
By reference to the accompanying drawings embodiments of the present invention are explained in detail above, but the present invention is not limited to above-mentioned embodiment, in the ken possessing those of ordinary skill in the art, can also under the prerequisite that does not depart from aim of the present invention, makes a variety of changes.

Claims (9)

1. a multiparameter water quality analyzer, is characterized in that: comprise hand held controller and at least one intelligence sensor, wherein hand held controller comprises battery, battery management module, display module, the one DC/DC module, the 2nd DC/DC module, the first central processing unit, keyboard and the first A/D interface, each intelligence sensor comprises the second central processing unit, the 3rd DC/DC module, the second A/D interface, reference voltage source, signal acquisition module and sensor, wherein the first central processing unit respectively with display module, keyboard, the 2nd DC/DC module, the first A/D interface, the second A/D interface is connected, wherein display module is also connected with the first A/D interface, the first A/D interface is also connected with the second A/D interface, the 2nd DC/DC module is also connected with battery management module, battery management module is also connected with a DC/DC module with battery respectively, the one DC/DC module is also connected with the 3rd DC/DC module, and the 3rd DC/DC module is connected with the second central processing unit with reference voltage source respectively, signal acquisition module respectively with the second central processing unit, sensor is connected with the second module interface, and central processing unit is also connected with the second A/D interface,
Battery management module is carried out management of charging and discharging to battery, battery is respectively a DC/DC module and the 2nd DC/DC module for power supply by battery management module, the one DC/DC module and the 2nd DC/DC module convert respectively the power supply of battery to first central processing unit, the 3rd DC/DC module and the needed voltage of reference voltage source, the voltage of generation is supplied with the second central processing unit and reference voltage source by the 3rd DC/DC module, the voltage transitions that reference voltage source provides the 3rd DC/DC module becomes signal acquisition module required voltage, gathered micro-signal is sent to signal acquisition module by sensor, the micro-signal that reference voltage source is received signal acquisition module sends to the second central processing unit after converting voltage signal to, the second central processing unit passes through to control the second A/D interface output digit signals and analog signal respectively by the voltage signal of receiving, the data signal of the second A/D interface output sends to the first central processing unit after the first A/D interface receives, the A/D Sampling Interface of the first central processing unit receives the analog signal of the second A/D interface output, the first central processing unit converts the analog signal of receiving and data signal to the contrasting data of measured parameter, and send to display module to show.
2. a kind of multiparameter water quality analyzer as claimed in claim 1, it is characterized in that: also comprise signal amplification module, the output of sensor is connected with the input of signal amplification module, the output of signal amplification module is connected with the input of signal acquisition module, signal amplification module comprises the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the first electric capacity, the second electric capacity, the first diode, the second diode, the 3rd diode, the 4th diode, the 5th diode, the first amplifier and the second amplifier, wherein, described the 7th resistance is slide rheostat,
One end of described the 12 resistance connects respectively one end of the 9th resistance, one end of the tenth resistance, the inverting input of the first amplifier;
The other end of described the 9th resistance connects one end of the second electric capacity, and the other end of described the second electric capacity connects respectively the other end of the tenth resistance, the output of the first amplifier, one end of the 4th resistance;
The normal phase input end of the first amplifier connects one end of the 11 resistance, the other end ground connection of described the 11 resistance;
The other end of described the 4th resistance connects respectively one end of the 3rd resistance, the inverting input of the second amplifier;
The other end of described the 3rd resistance connects respectively one end of the second resistance, the output of the second amplifier;
The normal phase input end of the second amplifier connects one end of the 5th resistance, the other end of described the 5th resistance connects the sliding end of slide rheostat, one end of described slide rheostat connects one end of the 6th resistance, the anode of the 5th diode, and the other end of described the 6th resistance connects the minus earth of dc source, described the 5th diode;
The other end of described slide rheostat connects respectively the negative electrode of the 4th diode, one end of the 8th resistance, the plus earth of described the 4th diode, another termination dc source of described the 8th resistance;
The other end of described the second resistance connects respectively one end of the first electric capacity, the anode of the second diode, the negative electrode of the 3rd diode, the other end ground connection of described the first electric capacity, the plus earth of described the 3rd diode, the negative electrode of described the second diode connect respectively one end of the first resistance, the negative electrode of the first diode, another termination dc source of described the first resistance, the plus earth of described the first diode.
3. a kind of multiparameter water quality analyzer as claimed in claim 1, it is characterized in that: the second A/D interface comprises chip MAX3458 and chip AD5410, the data that chip MAX3458 sends central processing unit are converted to data signal, and the data that chip AD5410 sends central processing unit are converted to analog signal.
4. a kind of multiparameter water quality analyzer as claimed in claim 3, it is characterized in that: described chip AD5410 forms signaling conversion circuit, this change-over circuit comprises the 13 resistance, the 14 resistance, the 15 resistance, the 16 resistance, the 17 resistance, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, the 7th electric capacity, the 8th electric capacity, the 9th electric capacity, the 7th diode, moment twin zener dioder, conversion chip, triode;
Described the 13 resistance one end be connected with the second pin of conversion chip, the other end of described the 13 resistance connects the 3rd pin of conversion chip;
The 6th pin of described conversion chip connects one end of the 14 resistance, the other end ground connection of described the 14 resistance;
The 24 pin of described conversion chip connects respectively one end of the 3rd electric capacity, one end of the 4th electric capacity, one end of the 7th electric capacity, one end of the 8th electric capacity, the other end of described the 3rd electric capacity connects the 22 pin of conversion chip, the other end of described the 4th electric capacity connects the 21 pin of conversion chip, the other end of described the 7th electric capacity, the equal ground connection of the other end of the 8th electric capacity;
The colelctor electrode of the 20 pin connecting triode of described conversion chip, the base stage of described triode connects one end of the 16 resistance, the other end of described the 16 resistance connects respectively the 19 pin of conversion chip, one end of the 17 resistance, one end of the 6th electric capacity
The other end ground connection of described the 6th electric capacity, the emitter stage of the other end difference connecting triode of described the 17 resistance, the anode of the 7th diode;
The negative electrode of described diode connect respectively the 9th electric capacity one end, moment twin zener dioder one end, the other end of described the 9th electric capacity, moment twin zener dioder the equal ground connection of the other end;
The 15 pin of described conversion chip, the 14 pin are all connected with one end of the 5th electric capacity, the other end ground connection of described the 5th electric capacity;
The 13 pin of described conversion chip connects one end of the 15 resistance, the other end ground connection of described the 15 resistance.
5. a kind of multiparameter water quality analyzer as described in claim 1 or 2 or 3, is characterized in that: the chip model that described battery management module adopts is BQ24026, and the chip model that a described DC/DC module adopts is SP6650, produces the DC voltage of 3.3V; The chip model that described the 2nd DC/DC module adopts is LM2577, and produces the DC voltage of 12V.
6. a kind of multiparameter water quality analyzer as described in claim 1 or 2 or 3, is characterized in that: the chip model that described reference voltage source adopts is TL431, and produces the DC voltage of 2.5V.
7. a kind of multiparameter water quality analyzer as described in claim 1 or 2 or 3, is characterized in that: described reference voltage source is connected with the second central processing unit by spi bus.
8. a kind of multiparameter water quality analyzer as described in claim 1 or 2 or 3, is characterized in that: signal acquisition module comprises chip LM91200 and gathers resistance.
9. a kind of multiparameter water quality analyzer as claimed in claim 8, is characterized in that: the voltage range of described analog signal is 4mV-20mV.
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