CN201532552U

CN201532552U - Miniature measuring and controlling device for water purification machine

Info

Publication number: CN201532552U
Application number: CN2009202541124U
Authority: CN
Inventors: 郝立辉
Original assignee: HEBEI CREATE INSTRUMENTATION TECHNOLOGIES Co Ltd
Current assignee: Hebei Createc Instrument Science & Technology Co., Ltd.
Priority date: 2009-10-21
Filing date: 2009-10-21
Publication date: 2010-07-21
Anticipated expiration: 2019-10-21

Abstract

The utility model discloses a miniature measuring and controlling device for a water purification machine, and relates to a TDS (Total Dissolved Solids) measuring and running state controlling device in the data acquisition and control field of fluid measurement analytical instruments for domestic water quality. The device comprises an electric power supply, a reference power supply, a TDS measurement circuit, a CPU (Central Processing Unit) information processor, a control signal acquisition and output circuit, a TDS sensor, a TDS digital and running state display, and other parts, wherein the TDS sensor acquires and inputs the TDS electric conductivity of water to the TDS measurement circuit to achieve detection and acquire measurement signals, the acquisition circuit acquires the running state signals of the water purification machine, the acquired measurement signals and the running state signals are all input to the CPU information processor for data processing, the processing result is input into the output circuit to control all the running state valves of the water purification machine to be opened or closed, at the same time, the processing result is input into the display to display the measurement result, and the whole measuring and controlling process is achieved. The miniature measuring and controlling device has the advantages of simple structure, small size, low cost, strong practicability, and the like, and is particularly suitable for being used as a water quality measurer and a running state controller in a water purification machine.

Description

Small-sized water purification machine measuring and controlling

Technical field

The utility model relates to a kind of small-sized water purification machine measuring and controlling in domestic water water quality fluid measurement analytical instrument data acquisition and the control field, and the water quality measurement and the work operation control that are specially adapted to various small-sized water purification machines make to measure controller.

Background technology

Various small-sized water purification machine in the market is simple in structure, cost is low, practical, for safe operation that guarantees small-sized water purification machine and the serviceable life that prolongs its core component (membrane module, supercharge pump etc.), used the water purification machine control system, but it can not guarantee water quality.In order to guarantee the up-to-standard of water quality, must use TDS (total dissolved solidss content, the ppm of unit) measurement instrument that water quality is detected to water purification machine water quality, adopt the TDS measurement instrument must increase the cost of equipment, increase user's financial burden, use operation detection extremely inconvenient simultaneously, therefore the device that water quality measurement and system are controlled both organic assembling has been the urgent practical problems that solves of present small-sized water purification machine.

Summary of the invention

The purpose of this utility model be to avoid the weak point in the above-mentioned background technology and provide a kind of and can guarantee the water purification machine safe operation, can guarantee its water quality continuous detecting both in conjunction with the small-sized water purification machine measuring and controlling of assembling, the utility model also has simple in structure, volume is little, cost is low, stable and safe in operation, dependable performance, easily Installation and Debugging, characteristics such as practical.

The purpose of this utility model is achieved in that

It comprises power supply 101, reference power supply 102, TDS metering circuit 103, CPU message handler 104, control signal Acquisition Circuit 105, control signal output circuit 106, TDS sensor 107, TDS numeral and state operation display 108; Wherein power supply 101 outbound ports 1 pin be connected with reference power supply 102 inbound ports 1 pin,

outbound port

2,3 pin+V ,-the V power end is corresponding with each parts+V ,-the V power end is connected; Each inbound port 2 pin and downlink connection of power supply 101 outbound ports, 4 pin and CPU message handler 104, control signal Acquisition Circuit 105, control signal output circuit 106, TDS numeral and state operation display 108; Reference power supply 102 outbound ports 2 pin are connected with the inbound port of TDS metering circuit 103; TDS metering circuit 103 outbound ports 1 pin is connected with CPU message handler 104 inbound ports 3 pin,

inbound port

3,4 pin are connected with TDS sensor 107

outbound ports

1,2 pin respectively; Control signal Acquisition Circuit 105

inbound ports

3,4,5,6 pin respectively with the anhydrous signal port B of low pressure, pure water case water full signal port C, pure water case lack of water signal port D, flush signal port E is connected by force, outbound port 1 pin is connected with CPU message handler 104 inbound ports 1 pin; CPU message handler 104 outbound ports 4 pin are connected with control signal output circuit inbound port 1 pin, outbound port 5 pin are connected with TDS numeral and state operation display 108 inbound ports 1 pin; Control signal output circuit 106

outbound ports

3,4,5,6 pin are connected with exceed standard solenoid valve port H, entering water electromagnetic valve port I of flushing valve port F, supercharge pump port G, TDS respectively.

The utility model TDS metering circuit 103 comprises quadrature oscillator 201,202, follower 203, small-signal compensator 204, ratio voltage divider 205, amplifier 206, wave detector 207, low-pass filter 208, selector switch 209, diode D1, D2, wherein quadrature oscillator 201 is gone into end 12 pin earth terminals, go out behind the end 14 pin series resistor R1 and capacitor C 1, C2, C3, C3, each end of C4 also connects, go into end 13 pin and capacitor C 1, the C4 other end, resistance R 2, R3, each end of R18, quadrature oscillator 202 goes out end 8 pin, follower 203 is gone into end 3 pin and reference power supply 102 outbound ports, 2 pin and is connect, R18 other end earth terminal, capacitor C 2 other ends and capacitor C 3 other ends, resistance R 2 other ends and quadrature oscillator 202 are gone into end 9 pin and are connect; Follower 203 is gone into end 2 pin and is gone out to hold 1 pin and TDS sensor 107 to go out end 2 pin and connect; TDS sensor 107 goes out end 1 pin and ratio voltage divider 205 and goes into respectively end and connecing of end 2 pin, resistance R 5, R6, R7, resistance R 5, each other end of R6, R7 are gone into

end

1,3,5 pin with selector switch 209 respectively and are connected, selector switch 209 goes out

end

2,4,6 and connects the back to go out end 1 pin, capacitor C 5 one ends with ratio voltage divider 205 and connect, ratio voltage divider 205 is gone into end 3 pin earth terminals, goes out end 7 pin, amplifier 206 with small-signal compensator 204 behind the capacitor C 5 one end series resistor R8 and goes into end 6 pin and resistance R 9, each end of R10 and connect; Earth terminal after small-signal compensator 204 is gone into end 6 pin and resistance R 3, each other end of R9 and met, goes into end 5 pin series resistor R4; Amplifier 206 goes into end 5 pin earth terminals, go out end 7 pin and resistance R 10 other ends, capacitor C 6 one ends and connect, and capacitor C 6 other ends and resistance R 11, R15 respectively an end also connect; Earth terminal after wave detector 207 is gone into end 9 pin and diode D1 positive pole, resistance R 11 other ends and resistance R 12 1 ends and met, goes into end 10 pin series resistor R13, go out end 8 pin and diode D1 negative pole, diode D2 positive pole and connect, the diode D2 negative pole and resistance R 12 other ends, resistance R 14 1 ends also connect; Earth terminal after low-pass filter 208 is gone into end 13 pin and resistance R 14, each other end of R15 and resistance R 17 1 ends and met, goes into end 12 pin series resistor R16, go out to hold 14 pin and resistance R 17 other ends, CPU message handler 104 inbound ports, 3 pin and connect; Quadrature oscillator 201,202, follower 203, small-signal compensator 204, ratio voltage divider 205, amplifier 206, wave detector 207, low-pass filter 208 are respectively gone into end 4 pin and are gone out end 2 pin+V voltage end with power supply 101 and connect, respectively go into end 11 pin and power supply 101 goes out to hold 3 pin-V voltage end and connects.

The utility model is compared background technology and is had following advantage:

1, the utility model adopts TDS metering circuit 103, TDS sensor 107 circuit directly to carry out continuous detecting to water purification machine water quality, has guaranteed the safety and the quality of people's domestic waters.

2, the utility model organically combines the TDS metering circuit 103 of water quality detection, TDS sensor 107 circuit and water purification machine operation control system and is assembled into an integral body, and is therefore easy to use, and the operation Installation and Debugging are simple and easy, practical.

3, the utility model adopts subminiature TDS sensor 107 and special-purpose TDS metering circuit 103, greatly reduces production cost and has reduced the volume that installs, and makes and realize water quality detection on water purification machine, has improved the performance and the quality of water purification machine greatly.

4, the detection data of the utility model TDS and operation control operation content all directly, intuitively show its result on TDS numeral and state operation display 108, guarantee stable and safe in operation, satisfy function of the market demand.

Description of drawings

Fig. 1 is an electric functional-block diagram of the present utility model.

Fig. 2 is the embodiment electrical schematic diagram of the utility model TDS metering circuit 103.

Embodiment

With reference to Fig. 1, Fig. 2, the utility model is made up of power supply 101, reference power supply 102, TDS metering circuit 103, CPU message handler 104, control signal Acquisition Circuit 105, control signal output circuit 106, TDS sensor 107, TDS numeral and state operation display 108.Fig. 1 is an electric functional-block diagram of the present utility model, and embodiment presses Fig. 1 connection line and forms the utility model.

Power supply 101 effects provide parts direct-current working volts at different levels among Fig. 1, output+V ,-V double-pass symmetric operating voltage, the operating voltage of reference power supply 102 is provided simultaneously, embodiment adopts commercially available multiple power source integration module element manufacturing, its output+V terminal voltage is+5V, output-V terminal voltage is-5V that input reference power supply 102 operating voltage are+2.5V voltage.Reference power supply 102 effect is that high stable power supply reference voltage of output inputs to TDS metering circuit 103 inbound ports 2 pin as the reference supply voltage and makes the reference reference voltage, and embodiment adopts commercially available general high stable integration module power supply to make.

103 effects of the utility model TDS metering circuit are to receive the TDS measuring-signal that 107 inputs of TDS sensor detect water quality, become stable TDS water quality electric signal to export to CPU message handler 104 TDS water quality measurement conversion of signals and carry out data processing.It is made up of quadrature oscillator 201,202, follower 203, small-signal compensator 204, ratio voltage divider 205, amplifier 206, wave detector 207, low pass filter 208, selector switch 209, diode D1, D2, as shown in Figure 2, Fig. 2 is the electrical schematic diagram of the utility model TDS metering circuit 103, and embodiment presses Fig. 2 connection line.Wherein quadrature oscillator 201,202 effects are to be combined into a sinusoidal ac signal generator, produce the oscillator signal of 1400Hz, sinusoidal ac signal amplitude by follower 203 outputs is exported by the high stability level, obtain stablizing amplitude output, control TDS sensor 107, improve and measure degree of stability, follower 203 effects are impedance matchings of satisfying oscillator signal.204 effects of small-signal compensator are under TDS sensor 107 no signal output situations, carry out zero correction by reference power supply 102.TDS measurement indication is not a null value when TDS sensor 107 no-outputs, and then small-signal compensator 204 compensates, and makes its initial value revert to null value, improves the accuracy that TDS detects.Ratio voltage divider 205 and selector switch 209 effects are to select to measure TDS range size, TDS measures range and is divided into third gear by selector switch 209, the TDS value of the tracer liquid of importing according to TDS sensor 107 when at every turn measuring is big or small, outputs to the next stage circuit after by the suitable range of selector switch 209 selections tested TDS selection signal input dividing potential drop proportioner 205 being amplified.Amplifier 206 effects are to select signal to amplify output dividing potential drop proportioner 205 input TDS.Wave detector 207 and diode D1, D2 effect are that the TDS sine wave signal that amplifier 206 inputs are selected is carried out detection, and detection becomes the output of half-wave TDS signal.Low-pass filter 208 effect is that the half-wave TDS signal with wave detector 207 inputs carries out low-pass filtering and converts direct current signal to and export to CPU message handler 104 and carry out data processing and become the TDS testing result.Embodiment quadrature oscillator 201,202, follower 203, small-signal compensator 204, ratio voltage divider 205, amplifier 206, wave detector 207, low-pass filter 208 all adopt commercially available LM324 type amplifier production of integrated circuits.Diode D1, D2 adopt commercially available 2CK type crystal diode to make.Selector switch 209 adopts commercially available three the universal switches making of spending extravagantly.

104 effects of the utility model CPU message handler are that each duty run signal of the TDS detection signal of input and 105 collections of control signal Acquisition Circuit is carried out data processing, compare differentiation with the standard signal that presets setting and obtain required processing signals result, input control signal output circuit 106 is exported, and will obtain required processing signals result simultaneously and import TDS numeral and state operation display 108 and directly show the result who measures control.Control signal Acquisition Circuit 105 effect is the full signal of the anhydrous signal of low pressure, pure water case water of gathering water purification machine work, pure water case lack of water signal, operating state signal input CPU message handler 104 such as flush signal is handled by force.Control signal output circuit 106 effect is that exceed standard solenoid valve, entering water electromagnetic valve of flushing valve, supercharge pump, the TDS with the data processing signal output control water purification machine of CPU message handler 104 inputs carries out the state safe operation.Embodiment C PU message handler 104 adopts commercially available PIC16F877 type CPU integrated chip circuit production.Control signal Acquisition Circuit 105 adopts commercially available TLP521-4 molded lines optocoupler to make.Control signal output circuit 106 adopts commercially available LM2003A type integrated chip circuit production.TDS numeral and state operation display 108 adopt the digital display tube of commercially available LED to make.

The utility model TDS sensor 107 effect is that the TDS conductivity variations of fluid to be measured is measured, and converts the variation of TDS conductivity to electric signal output and measure test result by TDS metering circuit 103.Embodiment TDS sensor 107 adopts commercially available 1.0cm ^-1The type electric conductivity sensor production.

The concise and to the point principle of work of the utility model is as follows: control signal Acquisition Circuit 105 will collect the full signal of the anhydrous signal of low pressure, pure water case water, pure water case lack of water signal of water purification machine work, operating state signal input CPU message handler 104 such as flush signal carries out data processing by force, simultaneously with the measuring-signal of 107 couples of fluid to be measured TDS of TDS sensor conductivity variations, input to TDS metering circuit 103 and measure TDS conductivity variations value input CPU message handler 104 and carry out data processing.Each operating state signal that CPU message handler 104 will collect and TDS conductivity measurement signal compare with the standard value that presets storage differentiates the output circuit of input control signal as a result 106 outputs that obtain each processing signals, and the result that will obtain each processing signals simultaneously imports TDS numeral and state operation display 108 and directly shows and measure the result who controls.Control signal output circuit 106 with flushing valve, supercharge pump, the TDS of each signal processing results output control water purification machine exceed standard solenoid valve, entering water electromagnetic valve is opened or the control signal of closing, and finishes the TDS conductivity measurement and the running status control of water purification machine.

The utility model mounting structure is as follows: Fig. 1, it is on 90 * 45 millimeters the printed circuit board that all circuit devcies among Fig. 2 except that TDS sensor 107 are installed in 3 block lengths * wide, that 3 printed circuit boards are installed in is long * wide * be in 48 * 96 * 100 millimeters the cabinet deeply, the printed board of TDS numeral and state operation display 108 circuit is installed on the cabinet front panel, each running status input signal port B of water purification machine is installed on the rear panel of cabinet, C, D, E and each output control signal port F, G, H, the circuit socket of I, the stube cable socket of TDS sensor 107 also is installed, TDS sensor 107 is installed in the pure water case of water purification machine, be connected with TDS metering circuit 103 by cable and cable plug, whole cabinet is inserted to be installed on the panel of water purification machine.

Claims

1. small-sized water purification machine measuring and controlling, it comprises power supply (101), reference power supply (102), CPU message handler (104), control signal Acquisition Circuit (105), control signal output circuit (106), TDS sensor (107), TDS numeral and state operation display (108); It is characterized in that: also comprise TDS metering circuit (103), wherein power supply (101) outbound port 1 pin be connected with reference power supply (102) inbound port 1 pin, outbound port 2,3 pin+V ,-the V power end is corresponding with each parts+V ,-the V power end is connected; Each inbound port 2 pin and downlink connection of power supply (101) outbound port 4 pin and CPU message handler (104), control signal Acquisition Circuit (105), control signal output circuit (106), TDS numeral and state operation display (108); Reference power supply (102) outbound port 2 pin are connected with the inbound port of TDS metering circuit (103); TDS metering circuit (103) outbound port 1 pin is connected with CPU message handler (104) inbound port 3 pin, inbound port 3,4 pin are connected with TDS sensor (107) outbound port 1,2 pin respectively; Control signal Acquisition Circuit (105) inbound port 3,4,5,6 pin respectively with the anhydrous signal port B of low pressure, pure water case water full signal port C, pure water case lack of water signal port D, flush signal port E is connected by force, outbound port 1 pin is connected with CPU message handler (104) inbound port 1 pin; CPU message handler (104) outbound port 4 pin are connected with control signal output circuit inbound port 1 pin, outbound port 5 pin are connected with TDS numeral and state operation display (108) inbound port 1 pin; Control signal output circuit (106) outbound port 3,4,5,6 pin are connected with exceed standard solenoid valve port H, entering water electromagnetic valve port I of flushing valve port F, supercharge pump port G, TDS respectively.

2. small-sized water purification machine measuring and controlling according to claim 1, it is characterized in that: TDS metering circuit (103) comprises quadrature oscillator (201,202), follower (203), small-signal compensator (204), ratio voltage divider (205), amplifier (206), wave detector (207), low-pass filter (208), selector switch (209), diode (D1, D2), wherein quadrature oscillator (201) is gone into end 12 pin earth terminals, go out behind the end 14 pin series resistor R1 and capacitor C 1, C2, C3, C3, each end of C4 also connects, go into end 13 pin and capacitor C 1, the C4 other end, resistance R 2, R3, each end of R18, quadrature oscillator (202) goes out end 8 pin, follower (203) is gone into end 3 pin and reference power supply (102) outbound port 2 pin and is connect, R18 other end earth terminal, capacitor C 2 other ends and capacitor C 3 other ends, resistance R 2 other ends and quadrature oscillator (202) are gone into end 9 pin and are connect; Follower (203) is gone into end 2 pin and is gone out to hold 1 pin and TDS sensor (107) to go out end 2 pin and connect; TDS sensor (107) goes out end 1 pin and ratio voltage divider (205) and goes into respectively end and connecing of end 2 pin, resistance R 5, R6, R7, resistance R 5, each other end of R6, R7 are gone into end 1,3,5 pin with selector switch (209) respectively and are connected, selector switch (209) goes out end 2,4,6 and connects the back to go out end 1 pin, capacitor C 5 one ends with ratio voltage divider (205) and connect, ratio voltage divider (205) is gone into end 3 pin earth terminals, goes out end 7 pin, amplifier (206) with small-signal compensator (204) behind the capacitor C 5 one end series resistor R8 and goes into end 6 pin and resistance R 9, each end of R10 and connect; Earth terminal after small-signal compensator (204) is gone into end 6 pin and resistance R 3, each other end of R9 and met, goes into end 5 pin series resistor R4; Amplifier (206) goes into end 5 pin earth terminals, go out end 7 pin and resistance R 10 other ends, capacitor C 6 one ends and connect, and capacitor C 6 other ends and resistance R 11, R15 respectively an end also connect; Earth terminal after wave detector (207) is gone into end 9 pin and diode D1 positive pole, resistance R 11 other ends and resistance R 12 1 ends and met, goes into end 10 pin series resistor R13, go out end 8 pin and diode D1 negative pole, diode D2 positive pole and connect, the diode D2 negative pole and resistance R 12 other ends, resistance R 14 1 ends also connect; Earth terminal after low-pass filter (208) is gone into end 13 pin and resistance R 14, each other end of R15 and resistance R 17 1 ends and met, goes into end 12 pin series resistor R16, go out to hold 14 pin and resistance R 17 other ends, CPU message handler (104) inbound port 3 pin and connect; Quadrature oscillator (201,202), follower (203), small-signal compensator (204), ratio voltage divider (205), amplifier (206), wave detector (207), low-pass filter (208) are respectively gone into end 4 pin and are gone out end 2 pin+V voltage end with power supply (101) and connect, respectively go into end 11 pin and power supply (101) to go out to hold 3 pin-V voltage end and connect.