CN2622703Y - Intelligence conductive resistivity monitor - Google Patents
Intelligence conductive resistivity monitor Download PDFInfo
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- CN2622703Y CN2622703Y CN 03231848 CN03231848U CN2622703Y CN 2622703 Y CN2622703 Y CN 2622703Y CN 03231848 CN03231848 CN 03231848 CN 03231848 U CN03231848 U CN 03231848U CN 2622703 Y CN2622703 Y CN 2622703Y
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Abstract
The utility model relates to an intelligent monitoring instrument of an conductivity and an electric resistivity, comprising a case body, the two conductivity probe heads and a resistivity probe head arranged outside the case body, is characterized in that a measurement circuit, an analog-digital conversion circuit, a single chip processor control circuit, a digital-analog conversion circuit, an electric current output circuit, a relay component, a display and a power supply circuit are arranged in the case body; the measurement circuit is formed from the three measuring unit circuits, of which the input ends are connected with the three probe heads separately, and an output end is connected with the input end of the analogue-digital conversion circuit; the input end of the single chip processor control circuit is connected with the output end of the analogue-digital conversion circuit; the output end of the single chip processor control circuit is connected respectively with the digital-analogue conversion circuit, the relay component and the display; the input end of the electric current output circuit is connected with the output end of the digital-analogue conversion circuit. The utility model incorporates the functions such as the measurement, the display, the setting up, the output, the communication and the control etc, and is cooperated with a water treatment equipment to make the measurement and monitoring direct viewing and an instrument replace the three traditional measuring apparatuses, which reduces the cost and is convenient to regulate and control.
Description
Technical field
The utility model relates to a kind of intelligent electricity to water quality composite measurement and control that is widely used in water treatment facilities and leads the resistivity monitor.
Background technology
At present, measuring instrument separates with controller on water treatment facilities, measurement to water quality, main conductivity meter or the resistivity meter of adopting, existing state electrogenesis conduction resistance rate instrument is non intelligent, this electricity conduction resistance instrument is an analog-and digital-instrument that combines, measure portion adopts mimic channel, measurement result shows with digital form, does not adopt single-chip microcomputer, so do not possess intelligent.To be extensive use of CM230 at present is example, and this quasi-instrument only provides one to measure passage, shows measurement result and 4-20mA is provided dc current signal do not possess control ability with digital form.
Existing controller mainly adopts programmable logic controller (PLC) (PLC).PLC possesses high reliability, but has the shortcoming of cost height and technical sophistication.On the low and middle-grade water treatment facilities of majority, control procedure is also uncomplicated, adopts PLC as controller, and the many functions of PLC can't be brought into play, causes the technical resource waste, has increased the cost of equipment simultaneously.PLC itself does not possess the ability of evaluating water quality, and in order to obtain water quality parameter, PLC be unable to do without traditional electricity and leads resistivity meter, and PLC leads the current signal of resistivity meter by the electricity of sampling, and obtains electrical conductivity of water or resistivity value.One cover water treatment facilities need a plurality of electricity conduction resistance instrument, and causing PLC like this is that the cost of water treatment facilities of controller is very high.On the other hand, the production technology difference of different water treatment facilities, because PLC technology more complicated, many low and middle-grade water treatment facilities producer does not grasp the development technique of PLC controller as yet, and the controller developer of PLC is in order to provide the perfect control scheme, on top of the production technology of each different water treatment facilities is write a cover PLC Control Software for each technology, and the workload that develops software is very big.
Summary of the invention
The purpose of this utility model is in order to solve existing water treatment facilities measurement, the control of water quality to be finished by measuring instrument and controller respectively, can not be by the shortcoming of same instrument to the water quality Based Intelligent Control, can lead the resistivity monitor to water quality monitor set and the intelligent electricity that is controlled to be one and provide a kind of, the supporting water treatment facilities that are used for of this monitor not only reduce the overall device cost, can also satisfy the demand of water treatment facilities to intelligent control technology.
The purpose of this utility model is achieved in that
A kind of intelligent electricity is led the resistivity monitor, comprises casing, is located at casing outer conductivity probe A, conductivity probe B, resistivity probe C, and conductivity probe A is arranged in the former water; Conductivity probe B is arranged in the pure water; Resistivity probe C is arranged in the high purity water; Respectively comprise a conductivity sensor and a temperature sensor among described two conductivity probe A and the B; Comprise an electric resistance sensor and a temperature sensor among this resistivity probe C; It is characterized in that:
In casing, be provided with metering circuit, analog to digital conversion circuit, single chip machine controlling circuit, D/A converting circuit, current output circuit, relay assembly, display and the power supply of each circuit working is provided;
Described metering circuit is made up of three measuring unit circuit, the input end of these three measuring unit circuit respectively with conductivity probe A, conductivity probe B, the corresponding connection of resistivity probe C; The output terminal of metering circuit is connected with the input end of analog to digital conversion circuit;
The input end of described single chip machine controlling circuit is connected with the output terminal of analog to digital conversion circuit; A plurality of output terminals of single chip machine controlling circuit are connected with D/A converting circuit, relay assembly, LCD respectively;
The input end of described current output circuit is connected with the output terminal of D/A converting circuit.
Lead in the resistivity monitor at above-mentioned intelligent electricity, wherein, described measuring unit circuit is made up of conductivity resistance rate metering circuit and temperature measuring circuit; Described conductivity resistance rate metering circuit is connected in series successively by sine-wave generator, sensor, AC amplifier, precision rectifer, DC filter and constitutes; Described temperature measuring circuit is connected in series by bleeder circuit and voltage follower and constitutes; The output terminal of described sensor is connected with the input end of described bleeder circuit 2121.
Lead in the resistivity monitor at above-mentioned intelligent electricity, wherein, described single-chip microcomputer and control circuit are made up of single-chip microcomputer, crystal oscillating circuit, watchdog circuit, key circuit, RS232 level shifting circuit, buzzer and driving circuit, control bus, data bus; The frequency signal end of described single-chip microcomputer connects crystal oscillating circuit; The signal end of single-chip microcomputer is connected with watchdog circuit is two-way; The input end of single-chip microcomputer connects key circuit; The data terminal of single-chip microcomputer is connected with the RS232 level shifting circuit is two-way; The output terminal of single-chip microcomputer connects buzzer and driving circuit; The control end of single-chip microcomputer is connected with control bus is two-way; The data-signal end of single-chip microcomputer is connected with data bus is two-way.
Lead in the resistivity monitor at above-mentioned intelligent electricity, wherein, described D/A converting circuit is made up of three digital to analog converters; The input end of these three digital to analog converters is connected with the signal output part of single-chip microcomputer respectively.
Lead in the resistivity monitor at above-mentioned intelligent electricity, wherein, described current output circuit is made up of three current output unit circuit; The input end of these three current output unit circuit respectively with the corresponding connection of input end of three digital to analog converters; The output terminal of these three current output unit circuit is connected with the corresponding terminals of back cover part respectively.
Lead in the resistivity monitor at above-mentioned intelligent electricity, wherein, described relay assembly is made up of three relay drive circuits; The input end of these three relay drive circuits is connected with the control signal end of single-chip microcomputer respectively, and the output terminal of these three relay drive circuits is connected with the corresponding terminals of back cover part respectively.
Lead in the resistivity monitor at above-mentioned intelligent electricity, wherein also comprise: a panel component, this panel component by panel, be arranged on the laterally spaced successively page switch key in panel below, parameter and key, position options button, numeral are set change key and constitute; Described page switch key, parameter are provided with key, position options button, numeral and change key and be connected with key circuit by lead.
Lead in the resistivity monitor at above-mentioned intelligent electricity, wherein also comprise: a back cover part; This back cover part is by bonnet, the lateral separation is provided with three terminals of three relay drive circuits respectively above bonnet; The lateral separation is provided with the line end and the 220V terminals of RS232 level shifting circuit respectively at the middle part of bonnet; The lateral separation is provided with three terminals of conductivity probe A, conductivity probe B, resistivity probe C and the terminals of current output circuit respectively below bonnet.
The utility model compared with prior art has tangible advantage and good effect:
1, the utility model intelligence electricity is led the complete comprehensive intelligent that integrates functions such as measurement, demonstration, setting, output, communication, control of resistivity monitor one cover and is measured and control instrumentation, the supporting water treatment facilities that are used for, not only reduce the overall device cost, can also satisfy the demand of water treatment facilities intelligent control technology.
2, the utility model is owing to be provided with A, B, three metering circuits of C, and every Lu Douyou is current output signal and relay controlled quentity controlled variable independently, and a new instrument can replace three measuring instruments of tradition, reduces cost greatly.
3, the utility model since the modulus that in metering circuit, has adopted high precision sine-wave generator, high performance operational amplifier, precision rectifying and filtering circuit, 12 bit resolutions change device and measure and ask average algorithm by thousands of times, stability, the linearity of metering circuit have been improved, reduce noise, finally improved the accuracy of measurement result.
4, the utility model since be provided with the high-performance single-chip microcomputer as in processor, adopt multiple anti-deadlock technology, improved the reliability of instrument greatly.
5. the utility model is owing to be provided with three groups of independently controlled quentity controlled variable outputs, controlled variable can be set by the user, and is provided with graph lcd module as display, and a plurality of Hanzify pages can be provided, except showing conductivity, resistivity value, can also displays temperature, instrument is provided with numerical value such as parameter; It is convenient to observe monitoring; Also provide printing function and with the communication function of microcomputer, these aspects have all strengthened the functions of use of instrument, measure to monitor intuitively, it is convenient to regulate control, uses simple.
Description of drawings
To the description of an embodiment of the present utility model, can further understand the purpose of this utility model, specific structural features and advantage by following in conjunction with its accompanying drawing.Wherein, accompanying drawing is:
Fig. 1 is that the utility model intelligence electricity is led resistivity monitor circuit block diagram.
Fig. 2 is the measuring unit circuit block diagram that the utility model intelligence electricity is led the resistivity monitor.
Fig. 3 is conductivity or the resistivity measurement circuit diagram that the utility model intelligence electricity is led the measuring unit circuit of resistivity monitor.
Fig. 4 is that the utility model intelligence electricity is led the temperature measuring circuit figure of the measuring unit circuit of resistivity monitor.
Fig. 5 is that the utility model intelligence electricity is led the single chip machine controlling circuit figure of resistivity monitor.
Fig. 6 is the panel component structural representation that the utility model intelligence electricity is led the resistivity monitor.
Fig. 7 is the back cover part structural representation that the utility model intelligence electricity is led the resistivity monitor.
Embodiment
It is the composite measurement and a controller that can be widely used in water treatment facilities that the utility model intelligence electricity is led the resistivity monitor.This monitor is a CPU (central processing unit) with the high-performance single-chip microcomputer, and A, B, three autonomous channels of C are provided, and physical parameters such as conductivity that can measure water, resistivity, temperature show measurement result, measurement result with electric current or digital mode output; By measurement result and preset value alerting signal and relay contact switch amount relatively be provided, be used to control the running status of water treatment facilities, realize the robotization of water treatment procedure.
See also Fig. 1, intelligent electricity is led the resistivity monitor, comprises casing 1, is provided with conductivity probe A, conductivity probe B, resistivity probe C outside casing, and described conductivity probe A is arranged in the former water; Described conductivity probe B is arranged in the pure water; Described resistivity probe C is arranged in the high purity water; Respectively comprise a conductivity sensor and a temperature sensor among these two conductivity probes (A), (B); Comprise an electric resistance sensor and a temperature sensor in this resistivity probe (C).
The metering circuit 2 that in casing, is provided with, analog to digital conversion circuit 3, single chip machine controlling circuit 4, D/A converting circuit 5, current output circuit 6, relay assembly 7, display 8 and the power supply 9 of each circuit working is provided, the panel component 10 that is provided with in the front of casing 1, the back cover part 11 that is provided with at the back of casing 1.
Please cooperate referring to Fig. 2, measuring unit circuit 21 is made up of conductivity resistance rate metering circuit 211 and temperature measuring circuit 212; Described conductivity resistance rate metering circuit 211 is connected in series successively by sine-wave generator 2111, sensor 2112, AC amplifier 2113, precision rectifer 2114, DC filter 2115 and constitutes; Described temperature measuring circuit 212 is connected in series by bleeder circuit 2121 and voltage follower 2122 and constitutes; The output terminal of described sensor 2112 is connected with the input end of described bleeder circuit 2121.
Please cooperate referring to Fig. 3, the output terminal of the sine-wave generator 2111 of conductivity resistance rate metering circuit 211 also connects a voltage follower, this voltage follower is by operational amplifier U1 and be connected resistance R 3, the R6 of operational amplifier U1 input port 3, and the capacitor C 1 that is connected with resistance R 3 other ends constitutes; AC amplifier 3113 is made of operational amplifier U2, the input port 6 that is connected operational amplifier U2 and the R2 between the output port 7, the resistance R 4 that is connected operational amplifier U2 output port 7; Input, the output terminal of electricity conduction resistance sensors A 1 are connected with the output port 1 of operational amplifier U1, the input port 6 of operational amplifier U2 respectively; Commutation diode D2, resistance R 5 that precision rectifer 3114 is serially connected in the output port 8 that is connected on operational amplifier U3 by operational amplifier U3, the input port 9 that is connected operational amplifier U3 and the commutation diode D1 between the output terminal 8, successively constitute; The input port 9 of operational amplifier U3 is connected with the other end of resistance R 4; DC filter 3115 is by operational amplifier U4, the input port 13 that is attempted by operational amplifier U4 and the resistance R 8 between the output port 14, capacitor C 2, and the stabilivolt D3, the capacitor C 3 that are serially connected in the output port 14 of operational amplifier U4 successively constitute; The input port 13 of operational amplifier U4 is connected with the other end of resistance R 5.
Please cooperate referring to Fig. 4, temperature measuring circuit 312 by operational amplifier U5, the input port 3 that is connected operational amplifier U5 and the capacitor C 6 between the ground, be connected operational amplifier U5 input port 3 and+divider resistance R7, the input port 3 that is connected operational amplifier U5 and the temperature sensor A2 between the ground between the 5V constitute.
Please cooperate referring to Fig. 5, single-chip microcomputer and control circuit 4 are made up of single-chip microcomputer 41, crystal oscillating circuit 42, watchdog circuit 43, key circuit 44, RS232 level shifting circuit 45, buzzer and driving circuit 46, control bus 47, data bus 48; The frequency signal end of described single-chip microcomputer 41 connects crystal oscillating circuit 42; Capacitor C 9, C10 that this crystal oscillating circuit 42 connects crystal oscillator Y1 two ends by crystal oscillator Y1, respectively constitute, and the two ends of crystal oscillator Y1 are connected with the port one 8,19 of single-chip microcomputer 41 respectively; The signal end of single- chip microcomputer 41 and 43 two-way connections of watchdog circuit; This watchdog circuit 43 is made of house dog integrated package U6, the port 3 that is connected house dog integrated package U6 and the resistance R 9 between the port 7; The port one of house dog integrated package U6, port 2, port 5, port 6, port 7 respectively with port one, port one 5, port one 4, port one 3, the port 9 corresponding connections of single-chip microcomputer 41.The input end of single-chip microcomputer 41 connects key circuit 44; Key circuit 44 comprises button S1, button S2, button S3, button S4, with door U7, with the door U8, with the door U9, resistance R 10, resistance R 11, resistance R 12, resistance R 13.The contact output point 2,4 of button S1 is connected with the port one with door U7; The contact output point 2,4 of button S2 be connected with the port 2 of door U7; The contact output point 2,4 of button S3 be connected with the port 4 of door U8; The contact output point 2,4 of button S4 be connected with the port 5 of door U8; With the output port 3 of door U7 be connected with the input port 9 of door U9; With the output port 6 of door U8 be connected with the input port 10 of door U9; Be connected with the port one 1 of single-chip microcomputer 41 with the output port 8 of door U9; The port 5 of one end of resistance R 10 and the contact output point 2 of button S1 and single-chip microcomputer 41 also connects; The port 6 of one end of resistance R 11 and the contact output point 2 of button S2 and single-chip microcomputer 41 also connects; The port 7 of one end of resistance R 12 and the contact output point 2 of button S3 and single-chip microcomputer 41 also connects; The port 8 of one end of resistance R 13 and the contact output point 2 of button S4 and single-chip microcomputer 41 also connects; Another termination power of resistance R 10, resistance R 11, resistance R 12, resistance R 13.RS232 level shifting circuit 45 is connected with port one 0, the port one 1 of single-chip microcomputer 41 respectively.The output port of single-chip microcomputer 41 connects by buzzer LS1 and is serially connected in the resistance R 13 of the input port 1 of buzzer LS1, the buzzer driving circuit 46 that triode Q1 constitutes.The control port 21 of single-chip microcomputer 41 to port 28 is connected with control bus 47; The data-signal port 32 to 39 of single-chip microcomputer 41 is connected with data bus 48.
The input end of single chip machine controlling circuit 4 is connected with the output terminal of analog to digital conversion circuit 3; D/A converting circuit 5 is made up of digital to analog converter 51, digital to analog converter 52, digital to analog converter 53; The input end of these three digital to analog converters 51,52,53 is connected with the signal output part of single-chip microcomputer 41 respectively; Current output circuit 6 is made up of current output unit circuit 61, current output unit circuit 62, current output unit circuit 63; The input end of these three current output unit circuit respectively with the corresponding connection of input end of digital to analog converter 51, digital to analog converter 52, digital to analog converter 53; The output terminal of these three current output unit circuit is connected with the corresponding terminals of back cover part respectively.Relay assembly 7 is made up of relay drive circuit 71, relay drive circuit 72, relay 73 driving circuits; The input end of these three relay drive circuits is connected with the control signal end of single-chip microcomputer (41) respectively, and the output terminal of these three relay drive circuits is connected with the corresponding terminals of back cover part respectively.
The output port of single-chip microcomputer 41 is connected with the input end of LCD 8.The external power source of this monitoring instrument is the 220V50Hz alternating current, and inside provides the direct supply 9 of one group ± 12V and two groups+5V to be the working power of each circuit.
Please cooperate referring to Fig. 6, panel component 10, comprise panel 101, be arranged on the laterally spaced successively page switch key 102 in panel below, parameter is provided with key 103, position options button 104, numeral change key 105, in panel, be provided with indicator gate 106, in this indicator gate 106, LCD 8 be set.
Please cooperate referring to Fig. 7 back cover part 11; Comprise bonnet 111, the lateral separation is provided with the outlet terminal 112,113,114 of relay 71,72,73 respectively above bonnet 111; These three terminals 112,113,114 by lead respectively be arranged on water treatment facilities in the Electric Machine Control end of corresponding valve be connected; The lateral separation is provided with the terminals 115 and the 220V terminals 116 of RS232 level shifting circuit respectively at the middle part of bonnet; These terminals 115 are connected with printer by lead; The lateral separation is provided with the terminals 117,118,119 of conductivity probe A, conductivity probe B, resistivity probe C and the terminals 1110 of current output circuit respectively below bonnet; These three terminals 117,118,119 are connected with conductivity probe A, conductivity probe B, resistivity probe C respectively by lead; Terminals 1110 are connected with Programmable Logic Controller in being arranged on water treatment facilities by lead.
The action principle of this monitor is, it is that the comprehensive intelligent that integrates functions such as measurement, demonstration, setting, output, communication, control is measured and the control instrumentation that the utility model intelligence electricity is led the resistivity monitor, this monitor provides three metering circuits, each metering circuit all has independently current output terminal, one group often open and one group of normally closed relay contact output terminal, and relay contact possesses the 220V AC load ability of 7A, can directly control all kinds of water pumps in the water treatment facilities.
Three metering circuits 21,22,23 in this monitor, wherein metering circuit 21,22 is an electrical conductivity measurement circuit, link to each other with two conductivity probes respectively, the measurement range of metering circuit 21 is 0～2000 μ S/cm, and the measurement range of metering circuit 22 is 0～200 μ S/cm; Metering circuit 23 is the resistivity measurement circuit, outer meeting resistance rate probe, and measurement range is 0～18.25M Ω .cm.The measuring principle of three metering circuits is similar, and they all comprise sine-wave generator, ac signal amplifiers, precision rectifer, four parts of DC filter.All comprise temperature sensor in each probe, so also include three road temperature measuring circuits in the metering circuit, the electric resistance partial pressure principle is adopted in temperature survey, and output signal is a temperature signal.
Analog to digital conversion circuit (AD) and D/A converting circuit (DA), in the output signal of metering circuit, it all is simulating signal, analog to digital conversion circuit becomes digital signal to analog signal conversion exactly, the input single-chip microcomputer is handled, in order to improve measuring accuracy, the analog to digital conversion circuit of this monitor adopts the analog to digital converter of a slice 11 passages 12 bit resolutions.From the signal of single-chip microcomputer output is digital signal; This monitor adopts the digital to analog converter chip of three 10 bit resolutions, after digital signal need convert simulating signal to by three digital to analog converters, flow to three current output circuits respectively, export the 4-20mA current signal of three different qualities respectively, transfer to Computer Processing; Control all kinds of water pumps in the water treatment facilities respectively by relay assembly simultaneously.
Single-chip microcomputer and control circuit, single-chip microcomputer are the cores of this instrument, its inside solidification software code, it finishes functions such as measurement, calculating, device drives, man-machine interface, parameter access, communication and control.Crystal oscillator in this single-chip microcomputer and the control circuit provides frequency signal for single-chip microcomputer; Watchdog circuit is used to monitor the running status of single-chip microcomputer, when single-chip microcomputer is subjected to external interference and operation exception occurs, watchdog circuit can in time be exported reset signal, single-chip microcomputer is resetted, program restarts, thereby guarantees the instrument operate as normal, owing to be provided with eeprom chip in watchdog circuit, even instrument is in off-mode, is kept at its inner parameter and also can lose.
Also be provided with the obtaining of communication program, measurement result demonstration and save routine, instrument parameter, modification and save routine in this monitor. man-machine interface programs such as graphic user interface and Chinese character demonstration, it is the single-chip microcomputer an integral part, key circuit is used for the transmission of button signal on the instrument panel, imports control signal and data-signal in each to single-chip microcomputer; Hummer is used to accept the alerting signal by single-chip microcomputer output, and the prompting of sounding; The RS232 level shifting circuit is the interface of single-chip microcomputer and Printer Information transmission, by the printer output measured data; Control bus is used for single-chip microcomputer and manages the execution unit transmission of control signals mutually, and data bus is used for single-chip microcomputer and manages the execution unit transmitting data information mutually; Respectively the picture of parameter setting and measurement result is shown by LCD, so that monitoring.
With the high purity water production technology is the control principle that example illustrates described monitor:
The resistivity probe C of monitor is installed in the water treatment facilities exit, measures the exit resistivity of water in real time; The normal open switch of C-channel relay links to each other with water delivering orifice place valve driving machine.The effect of this valve is to allow satisfactory water export from the exit, allows undesirable water return water treatment facilities.At first according to the water quality requirement of aquatic products, set the low alarm limit value of C-channel, this monitor is measured the exit resistivity of water in real time, and measurement result and low alarm limit value are made comparisons.When measurement result during less than the low alarm limit value, illustrate that the high purity water of producing is undesirable, at this moment the single-chip microcomputer in the monitor is sent control signal, by the relay drive circuit starting relay, the normal open switch closure of relay, start water delivering orifice place valve driving machine, allow undesirable water return water treatment facilities, reenter the generation flow process.When measurement result during greater than the low alarm limit value, illustrate that the high purity water of producing meets the requirements, at this moment single-chip microcomputer stops to send control signal, and the normal open switch of relay disconnects, and the valve opening at place, the mouth of a river allows satisfactory water send from the exit.
The utility model intelligence electricity is led the using method of resistivity monitor:
1, instrument is installed on the instrument container of water treatment facilities, by specification links to each other by lead conductivity sensor, resistivity sensor, pump motor, power lead, printer or microcomputer with the corresponding connection terminal of instrument bonnet;
2, opening power, parameter is provided with, press " page " button on the instrument panel, the page is switched to " parameter setting " page, enter the state of setting by " set " button, parameters such as " electrode constant ", " temperature compensation coefficient ", " warning bound " are set on request, then by " page " button return measurement state, instrument energy operate as normal.
When 3, this monitor is in normal operating conditions, the three drive test amount circuit that are provided with, wherein metering circuit 21 is the conductivity passage, measurement range is 0～2000 μ S/cm; Metering circuit 22 is the conductivity passage, and measurement range is 0～200 μ S/cm; Metering circuit 23 is the resistivity passage, and measurement range is 0～18.25M Ω .cm.Measuring accuracy is 1% (FS).
, and in time measured value and preset value are made comparisons output alarm signal and provide symbol and auditory tone cues when satisfying alert if by conductivity, the resistivity measurements of three metering circuits of liquid crystal display displays.By by " page " button, switch to the different pages, can also show measured value (without the conductivity resistance rate value of excess temperature compensation), temperature value; Corresponding with three metering circuits, independently 4-20mA electric current output of every Lu Douyou, and every Lu Douyou relay contact output terminal independently, the load capacity of contact is 7A (220VAC) electric current, can directly control all kinds of valves in the water treatment facilities.
In sum, the utility model intelligence electricity is led the resistivity monitor and is integrated functions such as measurement, demonstration, setting, output, communication, control, the measuring accuracy height, use reliable, aesthetic in appearance; This monitor can effectively reduce the cost of water treatment facilities, the automaticity of the low and middle-grade water treatment facilities of raising, filled up the blank of middle-grade water quality monitoring of China and control instrument aspect, satisfy the great demand of society to this quasi-instrument, break away from the situation of the main dependence on import of this quasi-instrument at present, for country saves valuable foreign exchange, have very big economic benefit and social benefit.
Claims (8)
1. an intelligent electricity is led the resistivity monitor, comprises casing (1), is located at casing outer conductivity probe (A), conductivity probe (B), resistivity probe (C), and conductivity probe (A) is arranged in the former water; Conductivity probe (B) is arranged in the pure water; Resistivity probe (C) is arranged in the high purity water; Described two conductivity probes (A) and (B) in respectively comprise a conductivity sensor and a temperature sensor; Comprise an electric resistance sensor and a temperature sensor in the described resistivity probe (C); It is characterized in that:
In casing, be provided with metering circuit (2), analog to digital conversion circuit (3), single chip machine controlling circuit (4), D/A converting circuit (5), current output circuit (6), relay assembly (7), display (8) and the power supply (9) of each circuit working is provided;
Described metering circuit (2) is made up of three measuring unit circuit (21,22,23), the input end of these three measuring unit circuit (21,22,23) respectively with conductivity probe (A), conductivity probe (B), the corresponding connection of resistivity probe (C); And the output terminal of metering circuit (2) is connected with the input end of analog to digital conversion circuit (3);
The input end of described single chip machine controlling circuit (4) is connected with the output terminal of analog to digital conversion circuit (3); A plurality of output terminals of single chip machine controlling circuit (4) are connected with D/A converting circuit (5), relay assembly (7), LCD (8) respectively;
The input end of described current output circuit (6) is connected with the output terminal of D/A converting circuit (5).
2, intelligent electricity according to claim 1 is led the resistivity monitor, it is characterized in that: described measuring unit circuit (21) is made up of conductivity resistance rate metering circuit (211) and temperature measuring circuit (212); Described conductivity resistance rate metering circuit (211) is by sine-wave generator (2111), sensor (2112), AC amplifier (2113), precision rectifer (2114), DC filter (2115) formation that is connected in series successively; Described temperature measuring circuit (212) is by bleeder circuit (2121) and voltage follower (2122) formation that is connected in series; The output terminal of described sensor (2112) is connected with the input end of described bleeder circuit (2121).
3, intelligent electricity according to claim 1 is led the resistivity monitor, it is characterized in that: described single-chip microcomputer and control circuit (4) are made up of single-chip microcomputer (41), crystal oscillating circuit (42), watchdog circuit (43), key circuit (44), RS232 level shifting circuit (45), buzzer and driving circuit (46), control bus (47), data bus (48); The frequency signal end of described single-chip microcomputer (41) connects crystal oscillating circuit (42); The signal end of single-chip microcomputer (41) and two-way connection of watchdog circuit (43); The input end of single-chip microcomputer (41) connects key circuit (44); The data terminal of single-chip microcomputer (41) and two-way connection of RS232 level shifting circuit (45); The output terminal of single-chip microcomputer (41) connects buzzer and driving circuit (46); The control end of single-chip microcomputer (41) and two-way connection of control bus (47); The data-signal end of single-chip microcomputer (41) and two-way connection of data bus (48).
4, intelligent electricity according to claim 1 is led the resistivity monitor, it is characterized in that: described D/A converting circuit (5) is made up of three digital to analog converters (51,52,53); The input end of these three digital to analog converters (51,52,53) is connected with the signal output part of single-chip microcomputer (41) respectively.
5, intelligent electricity according to claim 1 is led the resistivity monitor, it is characterized in that: described current output circuit (6) is made up of three current output unit circuit (61,62,63); The input end of these three current output unit circuit (61,62,63) respectively with the corresponding connection of input end of three digital to analog converters (51,52,53); The output terminal of these three current output unit circuit (61,62,63) is connected with the corresponding terminals of back cover part respectively.
6, intelligent electricity according to claim 1 is led the resistivity monitor, it is characterized in that: described relay assembly (7) is made up of three relay drive circuits (71,72,73); The input end of these three relay drive circuits (71,72,73) is connected with the control signal end of single-chip microcomputer (41) respectively, and the output terminal of these three relay drive circuits (71,72,73) is connected with the corresponding terminals of back cover part respectively.
7, intelligent electricity according to claim 1 is led the resistivity monitor, it is characterized in that also comprising: a panel component (10), this panel component (10) by panel (101), be arranged on panel below laterally spaced successively page switch key (102), parameter and key (103), position options button (104), numeral are set change key (105) and constitute; Described page switch key (102), parameter are provided with key (103), position options button (104), numeral and change key (105) and be connected with key circuit by lead.
8, intelligent electricity according to claim 1 is led the resistivity monitor, it is characterized in that also comprising: a back cover part (11); This back cover part (11) is by bonnet (111), the lateral separation is provided with three terminals (112,11,114) of three relay drive circuits (71,72,73) respectively in the top of bonnet (111); The lateral separation is provided with the line end (115) and the 220V terminals (116) of level shifting circuit respectively at the middle part of bonnet (111); The lateral separation is provided with three terminals (117,118), 119 of conductivity probe (A), conductivity probe (B), resistivity probe (C) respectively in the below of bonnet (111)) and the terminals (1110) of current output circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03231848 CN2622703Y (en) | 2003-06-06 | 2003-06-06 | Intelligence conductive resistivity monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03231848 CN2622703Y (en) | 2003-06-06 | 2003-06-06 | Intelligence conductive resistivity monitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2622703Y true CN2622703Y (en) | 2004-06-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03231848 Expired - Fee Related CN2622703Y (en) | 2003-06-06 | 2003-06-06 | Intelligence conductive resistivity monitor |
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| Country | Link |
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| CN (1) | CN2622703Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103529086A (en) * | 2013-10-18 | 2014-01-22 | 丹阳市现代生态水产养殖场 | Water electric conductivity monitoring system |
| CN104407217A (en) * | 2014-11-05 | 2015-03-11 | 贝兹维仪器(苏州)有限公司 | USB adapter applied to resistivity measuring instrument |
| CN104977322A (en) * | 2015-07-28 | 2015-10-14 | 华南理工大学 | Single-path seven-electrode conductivity detection monitor |
| CN106405461A (en) * | 2016-08-26 | 2017-02-15 | 江苏华伦化工有限公司 | Conductivity instrument verification method |
-
2003
- 2003-06-06 CN CN 03231848 patent/CN2622703Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103529086A (en) * | 2013-10-18 | 2014-01-22 | 丹阳市现代生态水产养殖场 | Water electric conductivity monitoring system |
| CN104407217A (en) * | 2014-11-05 | 2015-03-11 | 贝兹维仪器(苏州)有限公司 | USB adapter applied to resistivity measuring instrument |
| CN104407217B (en) * | 2014-11-05 | 2017-02-15 | 贝兹维仪器(苏州)有限公司 | USB adapter applied to resistivity measuring instrument |
| CN104977322A (en) * | 2015-07-28 | 2015-10-14 | 华南理工大学 | Single-path seven-electrode conductivity detection monitor |
| CN106405461A (en) * | 2016-08-26 | 2017-02-15 | 江苏华伦化工有限公司 | Conductivity instrument verification method |
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| CF01 | Termination of patent right due to non-payment of annual fee |