CN104460637A - Concentrated air conditioner control and management system - Google Patents
Concentrated air conditioner control and management system Download PDFInfo
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- CN104460637A CN104460637A CN201410815801.3A CN201410815801A CN104460637A CN 104460637 A CN104460637 A CN 104460637A CN 201410815801 A CN201410815801 A CN 201410815801A CN 104460637 A CN104460637 A CN 104460637A
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- 238000001816 cooling Methods 0.000 claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 238000012545 processing Methods 0.000 claims abstract description 18
- 238000002955 isolation Methods 0.000 claims description 30
- 238000004378 air conditioning Methods 0.000 claims description 17
- 238000004891 communication Methods 0.000 claims description 17
- 238000001514 detection method Methods 0.000 claims description 14
- 238000005057 refrigeration Methods 0.000 claims description 11
- 238000005259 measurement Methods 0.000 claims description 9
- 230000009977 dual effect Effects 0.000 claims description 8
- 230000007613 environmental effect Effects 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 238000004458 analytical method Methods 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 17
- 230000008569 process Effects 0.000 abstract description 15
- 230000000087 stabilizing effect Effects 0.000 description 36
- 239000003990 capacitor Substances 0.000 description 19
- 238000006243 chemical reaction Methods 0.000 description 15
- 230000006870 function Effects 0.000 description 8
- 230000001012 protector Effects 0.000 description 8
- 238000001914 filtration Methods 0.000 description 6
- 230000003750 conditioning effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000009123 feedback regulation Effects 0.000 description 3
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- 101000885321 Homo sapiens Serine/threonine-protein kinase DCLK1 Proteins 0.000 description 1
- 102100039758 Serine/threonine-protein kinase DCLK1 Human genes 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/4185—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by the network communication
- G05B19/4186—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by the network communication by protocol, e.g. MAP, TOP
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/26—Pc applications
- G05B2219/2638—Airconditioning
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Abstract
The invention provides a concentrated air conditioner control and management system which comprises a background control center and a front-end control cabinet. The background control center comprises a data processing server, a display screen, a data collector and a data controller. The front-end control cabinet comprises a main control cabinet body for mounting a system energy efficiency controller, a cold water control cabinet body for mounting a cold water pump controller, a cooling pump control cabinet body for mounting a cooling pump controller and a cooling fan control cabinet body for mounting a cooling fan controller. The system energy efficiency controller is connected with the background control center through a corresponding host. The system energy efficiency controller is connected with the cooling pump controller, the cooling fan controller and the cold water pump controller through a CAN circuit. According to the concentrated air conditioner control and management system, multiple controllers are designed, targeted special control is achieved, the energy efficiency controller is combined with the controllers of equipment, and the efficient, precise and low-powered control process of a central air conditioner system is better achieved.
Description
Technical field
The present invention relates to central air conditioner control field, specifically a kind of controlling system of central air conditioner.
Background technology
Central air conditioner is as the refrigeration plant of heavy construction and industrial plants, not only can provide stronger refrigeration, and can saves energy effectively, along with the development of industrial economy, and the situation of current domestic industry shortage of electric power, central air conditioner has become requisite refrigeration plant.But, in current central air conditioning control and management system, adopt the control of controller realization to each equipment in central air conditioner system, this control mode is accurate not, and also stability is not high, is not easy to safeguard, not only easily cause energy dissipation, and easy loss equipment.
Summary of the invention
In order to solve the above problems, the invention provides a kind of central air conditioning control and management system, devise multiple specialized controller, achieve and control specially targetedly, and utilize the controller of an efficiency controller bonding apparatus, better achieve central air conditioner system efficient, accurately, the control procedure of low consumption.
The present invention is by the following technical solutions: central air conditioning control and management system, comprise background control center and front-end control cabinet, described background control center comprises data processing server, display screen, data acquisition unit and recording controller, be used for acquisition and processing data, and by equipment running status display on a display screen;
Described front-end control cabinet comprises the total cabinet of control of installation system efficiency controller, the cold water switch board of water supply pump controller is installed, the cooling pump switch board of cooling pump controller is installed, the cooling blower switch board of cooling blower controller is installed, described system energy efficiency controller is connected with background control center by communication host, described system energy efficiency controller is respectively by CAN circuit and cooling pump controller, cooling blower controller, water supply pump controller connects, the realization of water supply pump switch board is to the state-detection of handpiece Water Chilling Units and control, the realization of cooling pump switch board is to the state-detection of refrigeration host computer and control, the realization of cooling blower switch board is to the state-detection of blower fan and control, control total cabinet by whole data upload to background control center, analysis in conjunction with background control center judges, realize the allotment to each energy efficiency of equipment in system and accurately control.
Further, described communication host also connects energy statistics platform by energy statistics bus.
Further, described efficiency controller comprises control module, power module, Ethernet unit, isolate Unit 485, USB unit, SD card, CAN buffer circuit, RS485 buffer circuit, output control unit, Input Control Element, Isolation input unit and isolation and amplifier unit, described control module comprises the first single-chip microcomputer, second singlechip, dual port RAM and adjunct unit, the first described single-chip microcomputer and second singlechip carry out two machine communication by dual port RAM, the first described single-chip microcomputer and second singlechip are connected an adjunct unit respectively, described adjunct unit comprises clock circuit, watchdog circuit, storer, reference source circuit, described Ethernet unit, isolate Unit 485, USB unit is connected the first single-chip microcomputer respectively with SD card, described CAN buffer circuit, RS485 buffer circuit, output control unit, Input Control Element, Isolation input unit is connected second singlechip respectively with isolation and amplifier unit, described Input Control Element comprises A/D modular converter, signal processing circuit, A/D modular converter output terminal connects second singlechip by SPI line, described signal processing circuit output terminal connects A/D modular converter input end, described output control unit comprises D/A modular converter, voltage-current converter circuit, D/A modular converter input end connects second singlechip by SPI line, described voltage-current converter circuit connects D/A modular converter output terminal, described Isolation input unit connects Wiring port, described isolation and amplifier unit connects driving circuit.
Further, described first single-chip microcomputer and second singlechip all adopt chip STM32F407VGT6.
Further, efficiency controller also comprises expanding element, and described expanding element connects the first single-chip microcomputer and second singlechip respectively by bus.
Further, described water supply pump controller comprises control module, switching input module, switching value output module, RS485 protection circuit, CAN protection circuit, level shifting circuit, simulated measurement input circuit and PWM change output circuit, described control module comprises STM32F103VBT6 single-chip microcomputer and FM3116 peripheral circuit, described switching input module is connected on single-chip microcomputer by Isolation input circuit, described switching value output module is connected on single-chip microcomputer by spacing output circuit, described RS485 protection circuit, CAN protection circuit, level shifting circuit, simulated measurement input circuit is connected on single-chip microcomputer respectively by a buffer circuit, the input end that PWM changes output circuit connects single-chip microcomputer, the output terminal that PWM changes output circuit exports 0-10V voltage signal and 4-20mA current signal.
Further, described cooling pump controller comprises STM32F103V676 single-chip microcomputer and power module, single-chip microcomputer is by RS485 interface junction chamber external environment acquisition module, single-chip microcomputer connects RS232 circuit and feedback data acquisition module by data line, single-chip microcomputer connects host computer communication module, electric quantity acquisition module and signal output control module respectively by spi bus, is equipped with voltage and current signal change-over circuit in described signal output control module and feedback data acquisition module.
Further, described cooling blower controller comprises power circuit, single-chip microcomputer, technological parameter acquisition module, environmental parameter acquisition module, isolated can circuit, blower fan protection circuit, electric quantity acquisition circuit and output module, described power circuit supply 5V voltage, described single-chip microcomputer is chip STM8S208MB, described technological parameter acquisition module and isolated can circuit are electrically connected on single-chip microcomputer, described environmental parameter acquisition module is connected on single-chip microcomputer by 485 circuit, described blower fan protection circuit by TTL data-signal and single-chip microcomputer mutual, described electric quantity acquisition module is connected with single-chip microcomputer volume by spi bus, described output module comprises D/A chip and V/I change-over circuit, the input end of described D/A chip connects single-chip microcomputer, the output terminal of described D/A chip connects V/I change-over circuit input end.
Preferably, described electric quantity acquisition module utilizes chip ATT7022 as acquisition chip.
Preferably, described D/A chip is TLV5616.
The invention has the beneficial effects as follows:
1, devise one and control total cabinet and three concrete device controllers, the realization of water supply pump switch board is to the state-detection of handpiece Water Chilling Units and control, the realization of cooling pump switch board is to the state-detection of refrigeration host computer and control, the realization of cooling blower switch board is to the state-detection of blower fan and control, control total cabinet by whole data upload to background control center, analysis in conjunction with background control center judges, realizes the allotment to each energy efficiency of equipment in system and accurately control.The control accuracy of whole system is higher, and reaction velocity is faster, and system energy consumption is lower.
2, in system energy efficiency controller, be provided with two single-chip microcomputers, between two single-chip microcomputers, carry out two machine communication by dual port RAM CY7C133.The concurrent working of two panels single-chip microcomputer, while realizing the function such as each controller and performer control, system debug, Function Extension, data statistics, improves the stability of travelling speed and system.
Accompanying drawing explanation
Fig. 1 is system principle structured flowchart of the present invention;
Fig. 2 is the schematic diagram of present system efficiency controller;
Fig. 3 is the schematic diagram of water supply pump controller of the present invention;
Fig. 4 is the schematic diagram of cooling pump controller of the present invention;
Fig. 5 is the schematic diagram of cooling blower controller of the present invention.
Embodiment
Central air conditioning control and management system as shown in Figure 1, comprise background control center and front-end control cabinet, described background control center comprises data processing server, display screen, data acquisition unit and recording controller, be used for acquisition and processing data, and by equipment running status display on a display screen, described front-end control cabinet comprises the total cabinet of control of installation system efficiency controller, the cold water switch board of water supply pump controller is installed, the cooling pump switch board of cooling pump controller is installed, the cooling blower switch board of cooling blower controller is installed, described system energy efficiency controller is connected with background control center by communication host, described system energy efficiency controller is respectively by CAN circuit and cooling pump controller, cooling blower controller, water supply pump controller connects, the realization of water supply pump switch board is to the state-detection of handpiece Water Chilling Units and control, the realization of cooling pump switch board is to the state-detection of refrigeration host computer and control, the realization of cooling blower switch board is to the state-detection of blower fan and control, control total cabinet by whole data upload to background control center, analysis in conjunction with background control center judges, realize the allotment to each energy efficiency of equipment in system and accurately control.
The equipment that said system can control not only comprises the links such as handpiece Water Chilling Units, water circulation system, air-conditioner set, VMC (Ventilation Mechanical Control System), room end, also comprise the auxiliary devices such as water replanishing device, water softening device, water treatment facilities, realize unified allocation of resources, centralized control and management.
System energy efficiency controller as shown in Figure 2, comprises control module, power module, Ethernet unit, isolates Unit 485, USB unit, SD card, CAN buffer circuit, RS485 buffer circuit, output control unit, Input Control Element, Isolation input unit and isolation and amplifier unit.
Described control module comprises the first single-chip microcomputer, second singlechip, dual port RAM and adjunct unit, the first described single-chip microcomputer and second singlechip carry out two machine communication by dual port RAM, the first described single-chip microcomputer and second singlechip are connected an adjunct unit respectively, described adjunct unit comprises clock circuit, watchdog circuit, storer, reference source circuit, clock circuit provides the unified time of system, reference source ensures the standard row of acquisition system, the reliability service of watchdog circuit safeguards system and timely failed services, the timely preservation of the operational factor of storer safeguards system.
Described Ethernet unit, isolate Unit 485, USB unit is connected the first single-chip microcomputer respectively with SD card, described CAN buffer circuit, RS485 buffer circuit, output control unit, Input Control Element, Isolation input unit are connected second singlechip respectively with isolation and amplifier unit.
Ethernet unit connects communication host, receives the instruction that also feedback communication host sends, realizes the data interaction between host computer and controller.
USB unit connects field adjustable computing machine, and be used for debugging and the operation conditions of detection control device, guarantee controller normally runs.
CAN buffer circuit output terminal connects the controller such as chilled water pump, cooling tower, realizes the adjustment to other controller in air-conditioning system and data acquisition.
RS485 buffer circuit connects several electricity quantity modules, gather electric quantity data, and by data via second singlechip, dual port RAM stored in the first single-chip microcomputer, these data can by the energy statistics platform interface be connected to by isolation 485 unit on the first single-chip microcomputer, be transferred to energy statistics platform, realize to power consumption data and the statistics of efficiency.
Described Input Control Element has 4, each control module can realize the input of 8 road signals, a control module comprises A/D modular converter, 8 signal processing circuits, A/D modular converter output terminal connects second singlechip by SPI line, described signal processing circuit output terminal connects A/D modular converter input end, signal processing circuit input end connects detected temperatures, humidity, pressure, the isoparametric sensor of flow and voltameter, by the data transfer of above-mentioned parameter to second singlechip.
Described output control unit has 24, a unit comprises D/A modular converter, voltage-current converter circuit, D/A modular converter input end connects second singlechip by SPI line, described voltage-current converter circuit connects D/A modular converter output terminal, the output terminal of voltage-current converter circuit connects the opertaing device such as variable valve, frequency converter, and the command sent by second singlechip is to opertaing device.
Described Isolation input unit has 64, and each unit all connects Wiring port, gathers the instrument and the performer state parameter that are connected to connectivity port.
Described isolation and amplifier unit has 48, and each unit all connects driving circuit, obtains the start and stop state of driving circuit place equipment.
Wherein, described first single-chip microcomputer and second singlechip all adopt chip STM32F407VGT6.
In use, central air conditioning control and management system can also comprise expanding element, described expanding element connects the first single-chip microcomputer and second singlechip respectively by bus, and with Presence Extensions model calling, realize adjustment to controller function by editing device.
Reference source circuit comprises triode Q3, the collector of triode Q3 connects 12V voltage, the emitter of triode Q3 connects first pin of reference source TLZ1000, second pin of reference source TLZ1000 connects the positive pole of diode D17, diode D17 minus earth, triode Q3 base stage connecting resistance R63 one end, another termination of resistance R63 amplifier LT1013 the 7th pin, amplifier LT1013 the 6th pin is by resistance R71 ground connection, amplifier LT1013 the 6th pin connects the 6th pin of reference source TLZ1000 by resistance R64, amplifier LT1013 the 5th pin connects the 8th pin of reference source TLZ1000, amplifier LT1013 the 5th pin is by electric capacity C54 ground connection, 4th pin of reference source TLZ1000 is by resistance R70 ground connection, the 7th pin ground connection of reference source TLZ1000, 5th pin of reference source TLZ1000 is by electric capacity C55 ground connection, 6th pin of resistance R65 mono-termination reference source TLZ1000, the resistance R65 other end is contact resistance R66 one end respectively, reference source TLZ1000 the 3rd pin, resistance R67 one end, diode D16 negative pole and resistance R68 one end, another termination of resistance R66 reference source TLZ1000 the 8th pin, another termination of resistance R67 reference source TLZ1000 the 5th pin, the resistance R68 other end connects reference voltage V REF output terminal and resistance R69 one end respectively, resistance R69 other end ground connection, diode D16 positive pole connects amplifier LT1013 first pin, amplifier LT1013 the 4th pin ground connection, amplifier LT1013 the 8th pin connects 12V voltage, amplifier LT1013 the 3rd pin connects reference source TLZ1000 the 5th pin, amplifier LT1013 second pin connecting resistance R73 one end, another termination triode of resistance R73 Q3 emitter, electric capacity C53 mono-termination triode Q3 emitter, electric capacity C53 other end connecting resistance R72 one end, another termination of resistance R72 amplifier LT1013 the 6th pin.
Wherein, reference source TLZ1000 produces 7.5V reference voltage, resistance R65 and resistance R66 plays the effect strengthening reference source driving force, a part of reference source TLZ1000 and diode D17 instrument composition temperature-compensation circuit, triode Q3, resistance R63, resistance R71, amplifier LT1013 form a constant current source, and resistance R68 and resistance R69 forms bleeder circuit.
Ethernet unit comprises chip LAN8720A, 24th pin of chip LAN8720A is by resistance R6 ground connection, 6th pin of chip LAN8720A is by electric capacity C27 ground connection, electric capacity C28, electric capacity C29 is in parallel respectively at electric capacity C27, the 25th pin ground connection of chip LAN8720A, 1st pin of chip LAN8720A is by electric capacity C26 ground connection, 9th pin of chip LAN8720A, 16th pin connects the 1st pin of chip LAN8720A respectively, the 21st pin contact resistance R2 one end and electric capacity C22 one end respectively of chip LAN8720A, another termination 3.3V voltage of resistance R2, electric capacity C22 other end ground connection, the 20th pin contact resistance R3 one end and electric capacity C23 one end respectively of chip LAN8720A, another termination 3.3V voltage of resistance R3, electric capacity C23 other end ground connection, the 23rd pin contact resistance R4 one end and electric capacity C24 one end respectively of chip LAN8720A, another termination 3.3V voltage of resistance R4, electric capacity C24 other end ground connection, the 22nd pin contact resistance R5 one end and electric capacity C25 one end respectively of chip LAN8720A, another termination 3.3V voltage of resistance R5, electric capacity C25 other end ground connection, electric capacity C20 mono-termination 3.3V voltage, other end ground connection, electric capacity C21 is in parallel with electric capacity C20, the 23rd of chip LAN8720A, 21, 20, 22 pins and 3.3V voltage connect the input end of isolating transformer respectively, 16th pin of isolating transformer connects the 1st pin of RJ45, 14th pin of isolating transformer connects the 2nd pin of RJ45, 11st pin of isolating transformer connects the 3rd pin of RJ45, 9th pin of isolating transformer connects the 6th pin of RJ45, the 13rd pin contact resistance R9 one end of isolating transformer, the resistance R9 other end is by electric capacity C30 ground connection, the 4th pin contact resistance R7 one end of RJ45, the resistance R7 other end is by electric capacity C30 ground connection, the 8th pin contact resistance R8 one end of RJ45, the resistance R8 other end is by electric capacity C30 ground connection, 4th pin of RJ45 connects the 5th pin of RJ45, 7th pin of RJ45 connects the 8th pin of RJ45, 9th pin of RJ45 connects the 7th pin of chip LAN8720A, 11st pin of RJ45 connects the 2nd pin of chip LAN8720A, 10th pin of RJ45 is by resistance R10 ground connection, 12nd pin of RJ45 is by resistance R11 ground connection.
Wherein, be provided with the protocol conversion chip LAN8720A filter network of C22, C23, C24, C25, C26, C27, C28, C29 composition, be provided with the 3.3V voltage filter network of C20, C21 composition, the driving force being provided with R2, R3, R4, R5 composition strengthens network, and the compatibility being provided with R7, R8, R9, C30 composition strengthens network, in conjunction with the effect of isolating transformer, not only increase isolation and compatibility, and improve networking speeds, greatly strengthen the stability of Ethernet cell operation.
Described isolation RS 485 circuit comprises chip ADM2587, the RX pin of chip ADM2587 connects RXD bus, the TX pin of chip ADM2587 connects TXD bus, the DE pin of chip ADM2587 connects second pin of phase inverter 74HC04, first pin of phase inverter 74HC04 connects RXD bus, 2nd pin of chip ADM2587 is by electric capacity C33 ground connection, 8th pin of chip ADM2587 connects the 2nd pin of chip ADM2587, the 1st of chip ADM2587, 3, 9, 10, 11, 14, 16, the equal ground connection of 20 pin, electric capacity C32, electric capacity C31 is in parallel with electric capacity C33 respectively, 12nd pin of chip ADM2587 is by electric capacity C36 ground connection, 19th pin of chip ADM2587 connects the 12nd pin of chip ADM2587, electric capacity C34, electric capacity C35 is in parallel with electric capacity C36 respectively, 15th pin of chip ADM2587 is by resistance R15 ground connection, 18th pin of chip ADM2587 meets VDD by resistance R12, 13rd pin of chip ADM2587 connects the 18th pin of chip ADM2587, 17th pin of chip ADM2587 connects the 15th pin of chip ADM2587, an input end of 485 protectors connects the 18th pin of ADM2587 by resistance R13, and connect the first output terminal by inductance L 4, another input end of 485 protectors connects the 15th pin of ADM2587 by resistance R14, and connect the second output terminal by inductance L 5, the earth terminal ground connection of 485 protectors, the negative pole of voltage stabilizing diode D1 connects the first output terminal, the positive pole of voltage stabilizing diode D1 connects the negative pole of the second output terminal and voltage stabilizing diode D2 respectively, the plus earth of voltage stabilizing diode D2, the negative pole of voltage stabilizing diode D3 connects the first output terminal, the plus earth of voltage stabilizing diode D3, the two ends of discharge tube connect the first output terminal and the second output terminal respectively, the earth terminal ground connection of discharge tube, one termination first output terminal of resistance R16, another termination K switch 1 one end of resistance R16, another termination second output terminal of K switch 1, 3rd pin of phase inverter 74HC04 connects RXD bus, 4th pin of phase inverter 74HC04 connects LED1 positive pole, LED1 negative pole connecting resistance R17 one end, resistance R17 other end ground connection, 5th pin of phase inverter 74HC04 connects TXD bus, 6th pin of phase inverter 74HC04 connects LED2 positive pole, LED2 negative pole connecting resistance R18 one end, resistance R18 other end ground connection, 2nd pin of chip ADM2587 connects 5V voltage vcc, and the 12nd pin of chip ADM2587 meets VDD.
Wherein, devise the current-limiting protection measures such as resistance R13, resistance R14,485 protectors, discharge tube, utilize inductance L 4, inductance L 5 to eliminate interference, be also provided with D2, D3, D1 to improve stability; be provided with resistance R16 and K switch 1 at output terminal, reach the adjustable effect of matching distance.
Described CAN buffer circuit comprises isolating chip ADUM1201 and transceiver PCA82C250, first pin of isolating chip ADUM1201 connects 3.3V voltage, second pin of isolating chip ADUM1201 connects CAN_RXD bus, isolating chip ADUM1201 the 3rd pin connects CAN_TXD bus, the 4th pin ground connection of isolating chip ADUM1201, 8th pin of isolating chip ADUM1201 connects 5V voltage, 8th pin of isolating chip ADUM1201 is by electric capacity C37 ground connection, 7th pin of isolating chip ADUM1201 passes through the TXD pin of resistance R19 transceiver PCA82C250, 6th pin of isolating chip ADUM1201 passes through the RXD pin of resistance R20 transceiver PCA82C250, the 5th pin ground connection of isolating chip ADUM1201, the Vcc pin of transceiver PCA82C250 connects 5V voltage, the GND pin ground connection of transceiver PCA82C250, 6th pin of transceiver PCA82C250 is by resistance R23 ground connection, 7th pin of transceiver PCA82C250 connects 5V voltage by resistance R22, the 8th pin contact resistance R21 one end of transceiver PCA82C250, another termination capacitor C38 one end of resistance R21, another termination 5V voltage of electric capacity C38, the two ends of CAN protector connect the 7th pin and the 6th pin of transceiver PCA82C250 respectively, one end of CAN protector connects CANH port by resistance R24, the other end of CAN protector connects CANL port by resistance R25, the negative pole of voltage stabilizing diode D4 connects CANH port and voltage stabilizing diode D6 negative pole respectively, the positive pole of voltage stabilizing diode D4 connects CANL port and voltage stabilizing diode D5 negative pole respectively, voltage stabilizing diode D5 positive pole and the equal ground connection of voltage stabilizing diode D6 positive pole, resistance R26 mono-termination CANH port, another termination K switch 2 one end of resistance R26, another termination CANL port of K switch 2.
Wherein, magnetic coupling isolating chip ADUM1201 is utilized to replace traditional light-coupled isolation chip; improve isolation effect and serviceable life; reduce production and use cost; devise the current-limiting protection measures such as CAN protector, resistance R24, resistance R25, diode D4, diode D5, diode D6, enhance the stability of use, simultaneously; set up resistance R26 and K switch 2, the distance that terminal is mated can regulate.
Described Input Control Element comprises eight signal processing circuits, eight signal processing circuit signal output parts connect chip CD4051 the 13rd respectively, 14, 15, 12, 1, 5, 2, 4 pins, described signal processing circuit comprises voltage signal inputs and current signal input end, voltage signal inputs connecting resistance R27 one end, the resistance R27 other end connects diode D7 positive pole respectively, diode D8 negative pole, resistance R28 one end, diode D7 negative pole connects+12V voltage, diode D8 plus earth, the resistance R28 other end connects electric capacity C39 one end respectively, resistance R29 one end and signal output part, electric capacity C39 other end ground connection, resistance R29 other end ground connection, current signal input end is by fuse connecting resistance R30 one end respectively of 20mA, resistance R31 one end, the resistance R30 other end and the equal ground connection of the resistance R31 other end, chip CD4051 the 7th, 8 pin ground connection, chip CD4051 the 16th pin connects+15V voltage, electric capacity C40 mono-termination+15V voltage, electric capacity C40 other end ground connection, chip CD4051 the 3rd pin is by electric capacity C41 ground connection, resistance R32 mono-chip termination CD4051 the 3rd pin, resistance R32 other end ground connection, resistance R33 one end ground connection, the resistance R33 other end connects TLV2572 negative input and resistance R34 one end respectively, another termination TLV2572 output terminal of resistance R34, TLV2572 electrode input end connects chip CD4051 the 3rd pin, resistance R35 mono-termination TLV2572 output terminal, the IN+ pin of another termination of resistance R35 A/D chip AD7683, the IN+ pin of electric capacity C42 mono-termination A/D chip AD7683, electric capacity C42 other end ground connection, the IN-pin of A/D chip AD7683 and GND pin ground connection, the REF pin of A/D chip AD7683 meets reference voltage reference voltage V ref, electric capacity C43 mono-termination reference voltage reference voltage V ref, electric capacity C43 other end ground connection, the VD pin of A/D chip AD7683 connects 5V voltage and isolating chip ADUM5241 first pin, the DCLK pin of A/D chip AD7683 connects isolating chip ADUM5241 second pin, the DOUT pin of A/D chip AD7683 connects isolating chip ADUM5241 the 3rd pin, the CS pin of A/D chip AD7683 connects isolating chip ADUM1410 the 14th pin, electric capacity C44 mono-termination 5V voltage, electric capacity C44 other end ground connection, chip CD4051 the 11st pin is by electric capacity C45 ground connection, chip CD4051 the 11st pin connects optocoupler TLP521-4 the 16th pin by resistance R36, resistance R37 mono-termination 5V voltage, the resistance R37 other end connects diode D9 negative pole and optocoupler TLP521-4 the 16th pin respectively, diode D9 plus earth, optocoupler TLP521-4 the 15th pin ground connection, chip CD4051 the 10th pin is by electric capacity C46 ground connection, chip CD4051 the 10th pin connects optocoupler TLP521-4 the 14th pin by resistance R38, resistance R39 mono-termination 5V voltage, the resistance R39 other end connects diode D10 negative pole and optocoupler TLP521-4 the 14th pin respectively, diode D10 plus earth, optocoupler TLP521-4 the 13rd pin ground connection, chip CD4051 the 9th pin is by electric capacity C47 ground connection, chip CD4051 the 9th pin connects optocoupler TLP521-4 the 12nd pin by resistance R40, resistance R41 mono-termination 5V voltage, the resistance R41 other end connects diode D11 negative pole and optocoupler TLP521-4 the 12nd pin respectively, diode D11 plus earth, optocoupler TLP521-4 the 11st pin ground connection, chip CD4051 the 6th pin is by electric capacity C48 ground connection, chip CD4051 the 6th pin connects optocoupler TLP521-4 the 10th pin by resistance R42, resistance R43 mono-termination 5V voltage, the resistance R43 other end connects diode D12 negative pole and optocoupler TLP521-4 the 10th pin respectively, diode D12 plus earth, optocoupler TLP521-4 the 9th pin ground connection, optocoupler TLP521-4 the 1st, 3,5,7 pins connect+5V voltage, optocoupler TLP521-4 the 2nd pin connects single-chip microcomputer PG0 pin by resistance R44, optocoupler TLP521-4 the 4th pin connects single-chip microcomputer PG1 pin by resistance R45, optocoupler TLP521-4 the 6th pin connects single-chip microcomputer PG2 pin by resistance R46, and optocoupler TLP521-4 the 6th pin connects single-chip microcomputer PG3 pin by resistance R47.
Wherein, adopt A/D chip AD7683 and magnetic coupling isolating chip ADUM1410, ADUM5241, improve conversion accuracy and isolation performance, utilize CD4051 connection signal treatment circuit, adopt 3 control ports to realize the judgement of 8 kinds of array modes, reduce cost.
Output control unit comprises triode Q1, the collector of triode Q1 connects 5V voltage, the emitter of triode Q1 meets reference voltage V ref, the base stage of triode Q1 connects 5V voltage by resistance R48, the one termination reference voltage V ref of resistance R49, the resistance R49 other end connects reference pole and resistance R50 one end of TL431 respectively, resistance R50 other end ground connection, the negative electrode of TL431 connects triode Q1 base stage, the plus earth of TL431, resistance R51 mono-termination reference voltage V ref, another termination triode Q2 emitter of resistance R51, triode Q2 base stage connects 12V voltage by resistance R54, triode Q2 collector connects current output terminal by resistance R55, circuit between resistance R55 and current output terminal is provided with fuse, the collector of triode Q2 connects diode D13 negative pole, diode D13 plus earth, triode Q2 base stage connecting resistance R53 one end, the resistance R53 other end connects electric capacity C49 one end and amplifier LM324 the 8th pin respectively, the electric capacity C49 other end is connecting resistance R52 one end and amplifier LM324 the 9th pin respectively, another termination triode of resistance R52 Q2 emitter, amplifier LM324 the tenth pin is by resistance R57 ground connection, amplifier LM324 the tenth pin meets reference voltage V ref by resistance R58, amplifier LM324 the 9th pin connects amplifier LM324 the 7th pin by resistance R56, amplifier LM324 the 7th pin connects voltage output end by resistance R59, diode D14 negative pole connects 15V voltage, diode D14 positive pole connects voltage output end, diode D15 negative pole connects voltage output end, diode D15 plus earth, amplifier LM324 the 5th pin is by electric capacity C51 ground connection, the 6th pin connecting resistance R60 one end respectively of amplifier LM324, slide rheostat R61 mobile terminal, slide rheostat R60 one end, the slide rheostat R60 other end connects amplifier LM324 the 7th pin by resistance R60, electric capacity C50 is in parallel with slide rheostat R60, the slide rheostat R60 other end connects 5V voltage by resistance R62, amplifier LM324 the 5th pin connects first pin of DA chip MAX541, 8th pin of A/D chip MAX541 connects 5V voltage, the second pin ground connection of DA chip MAX541, 3rd pin of DA chip MAX541 meets reference voltage V ref, 4th pin of DA chip MAX541 meets isolating chip ADUM1410, 5th pin of DA chip MAX541 connects the SCLK pin of isolating chip ADUM524D, 6th pin of DA chip MAX541 connects the DIN pin of isolating chip ADUM524D, the 7th pin ground connection of DA chip MAX541, 8th pin of DA chip MAX541 is by electric capacity C52 ground connection.
Wherein, for current output terminal is equipped with fuse, for voltage output end is equipped with the clamped protection of D14, D15, prevent from burning out chip; Be provided with reference source, ensure the constant of LM324 the tenth pin voltage, ensure job stability; Employ magnetic coupling isolating chip ADUM1410, ADUM524D, enhance isolation performance and stability; The design of total, ensure that the output accuracy of electric current and voltage.
Water supply pump controller as shown in Figure 3, comprise control module, switching input module, switching value output module, RS485 protection circuit, CAN protection circuit, level shifting circuit, simulated measurement input circuit and PWM change output circuit, described control module comprises STM32F103VBT6 single-chip microcomputer and FM3116 peripheral circuit, described switching input module is connected on single-chip microcomputer by Isolation input circuit, described switching value output module is connected on single-chip microcomputer by spacing output circuit, described RS485 protection circuit, CAN protection circuit, level shifting circuit, simulated measurement input circuit is connected on single-chip microcomputer respectively by a buffer circuit, the input end that PWM changes output circuit connects single-chip microcomputer, the output terminal that PWM changes output circuit exports 0-10V voltage signal and 4-20mA current signal.
Switching input module and switching value output module connecting valve amount valve, the state of detection control switching value valve, RS485 protection circuit connects electricity quantity module, simulated measurement input circuit pick-up transducers signal, and above-mentioned signal is sent to core controller through CAN protection circuit, after core controller process, receive the instruction from core controller, then send instruction, wherein, level shifting circuit connects soft switch, controls switching state; PWM changes output circuit and is converted to 0-10V voltage signal and 4-20mA current signal through control signal, sends to corresponding performer respectively.
Power circuit comprises power pack and debug port, described power pack comprises current rectifying and wave filtering circuit, feedback regulation circuit, 5V voltage follower circuit and 12V voltage follower circuit, described current rectifying and wave filtering circuit comprises light emitting diode LED201, the positive pole of light emitting diode LED201 connects 220V alternating current zero line side, negative pole contact resistance R2052 one end of LED 201, the live wire end of another termination 220V alternating current of resistance R2052, 220V alternating current zero line side connects an input end of full-wave rectification bridge by fuse F201, the live wire end of 220V alternating current connects another input end of full-wave rectification bridge, an output terminal of full-wave rectification bridge connects polar capacitor C2019 positive pole respectively, resistance R2054 one end, resistance R2055 one end, electric capacity C2022 one end and transformer T201 first input end, polar capacitor C2019 negative pole and resistance R2054 other end ground connection, the resistance R2055 other end and the electric capacity C2022 other end connect diode D2018 negative pole respectively, diode D2018 cathode connecting transformer T201 the 3rd input end, another termination polar capacitor of resistance R2054 C2020 positive pole, electric capacity C2021 one end and diode D2017 negative pole, polar capacitor C2020 negative pole, the electric capacity C2021 other end and the equal ground connection of transformer T1 the 5th input end, diode D2017 cathode connecting transformer T201 four-input terminal, described 5V voltage follower circuit comprises electric capacity C2023, electric capacity C2023 one end connects transformer T201 the 7th output terminal and diode D2019 positive pole respectively, electric capacity C2023 other end connecting resistance R2056 one end, the resistance R2056 other end connects diode D2019 negative pole, polar capacitor C2024 positive pole, polar capacitor C2025 positive pole, LED 202 positive pole and 5V voltage output end respectively, the negative pole of polar capacitor C2024, transformer T1 the 6th output terminal, the equal ground connection of polar capacitor C2025 negative pole, LED 202 negative pole is by resistance R2057 ground connection, described 12V voltage follower circuit comprises voltage stabilizing chip 7812 and voltage stabilizing chip 7912, first pin of voltage stabilizing chip 7812 connects diode D2020 negative pole and polar capacitor C2026 positive pole respectively, diode D2020 cathode connecting transformer T1 the tenth output terminal, polar capacitor C2026 minus earth, voltage stabilizing chip 7,812 second pin ground connection, voltage stabilizing chip 7812 the 3rd pin connecting resistance R2058 one end and+12V output terminal, resistance R2058 other end ground connection, polar capacitor C2027 positive pole connects+12V output terminal, polar capacitor C2027 minus earth, voltage stabilizing chip 7,912 first pin ground connection, voltage stabilizing chip 7,912 second pin connects diode D2021 positive pole and polar capacitor C2029 negative pole respectively, diode D2021 negative pole connects transformer T201 the 8th output terminal, polar capacitor C2029 plus earth, voltage stabilizing chip 7912 the 3rd pin is connecting resistance R2059 one end and-12V output terminal respectively, resistance R2059 other end ground connection, and polar capacitor C2028 negative pole connects-12V output terminal, polar capacitor C2028 plus earth, transformer T201 the 9th output head grounding, described feedback regulation circuit comprises chip UC3842, 7th pin of chip UC3842 connects polar capacitor C2020 positive pole, chip UC3842 the 5th pin ground connection, chip UC3842 second pin connects slide rheostat R2066 one end respectively, electric capacity C2033 one end, resistance R2067 one end, resistance R2068 one end, the electric capacity C2033 other end and the slide rheostat R2066 other end connect chip UC3842 first pin respectively, resistance R2067 other end ground connection, the resistance R2068 other end is connecting resistance R2069 one end and optocoupler PC817 the 3rd pin respectively, resistance R2069 other end ground connection, optocoupler PC817 the 4th pin connects 5V reference voltage, optocoupler PC817 first pin is connecting resistance R2070 one end respectively, resistance R2071 one end, another termination 5V voltage of resistance R2070, another termination TL431 of resistance R2071 the 3rd pin, TL431 second pin ground connection, TL431 first pin is connecting resistance R2071 one end and slide rheostat R2073 one end respectively, another termination 5V voltage of resistance R2072, slide rheostat R2073 other end ground connection, chip UC3842 first pin connects diode D2023 positive pole, diode D2023 negative pole is connecting resistance R2074 one end, electric capacity C2034 one end and diode D2024 positive pole respectively, the resistance R2074 other end and diode D2024 negative pole connect 5V reference voltage, electric capacity C2034 other end ground connection, 8th pin of chip UC3842 connects 5V reference voltage and slide rheostat R2075 one end respectively, the slide rheostat R2075 other end connects chip UC3842 the 5th pin by electric capacity C2032, the 4th pin of the slip chip termination UC3842 of slide rheostat R2075, chip UC3842 the 6th pin connecting resistance R2065 one end, the resistance R2065 other end is connecting resistance R2063 one end and Q201 first pin respectively, resistance R2063 other end ground connection, Q201 second pin connects transformer T201 the 3rd input end, diode D2022 negative pole and resistance R2060 one end respectively, diode D2022 positive pole and the resistance R2060 other end connect electric capacity C2030 one end respectively, electric capacity C2030 one end ground connection, Q201 the 3rd pin is connecting resistance R2061 one end, resistance R2062 one end and resistance R2064 one end respectively, the resistance R2061 other end and resistance R2062 other end ground connection, the resistance R2064 other end connects chip UC3842 the 3rd pin and electric capacity C2031 one end respectively, electric capacity C2031 other end ground connection, described debug port comprises J7, J8, J9, J10, J11, J12, J13, J14, J17, J18, J19, J20, J29, J30, J31, J22, J32, J33, J25, J28, J34, J35, J7 connects the 4th pin of UC203842, J8 connects the 3rd pin of UC3842, J9 connects the 6th pin of UC3842, and J10 connects the 7th pin of UC3842, and J11 connects the 2nd pin of UC3842, J12 connects the 5th pin of UC3842, J13 connects the 8th pin of UC3842, and J14 connects the 1st pin of UC3842, and J17 connects first pin of Q201, J18 connects the 3rd pin of Q201, J19 connects second pin of Q201, and J20 connects the 3rd pin of optocoupler PC817, and J29 connects first pin of optocoupler PC817, J30 connects second pin of optocoupler PC817, J31 connects first pin of TL431, and J22 connects the first input end of transformer T1, J32, J33 connects the 6th output terminal of transformer T1, J25 street voltage stabilizing chip 7,812 first pin, and J28 connects voltage stabilizing chip 7,912 second pin, J34, J35 all connects transformer T1 the 9th output terminal.
The alternating voltage of 220V, protect through overcurrent fuse, through overcommutation, after filtering, enter transformer high-voltage input end, the output terminal of transformer has two, one exports 5V voltage, an output terminal exports+12V voltage and-12V voltage, at the input end of transformer, be provided with feedback regulation circuit, control chip is utilized to realize the regulation and control of power circuit, R2065 is current-limiting resistance, R2063 is pull down resistor, C2031 is filter capacitor, R2061 and R2062 is protective resistance, resistance R2075 and electric capacity C2032 produces oscillating impulse, D2024, R2074, D2023, C2034 can realize soft start, the effect of optocoupler PC20817 and the circuit realiration feedback be attached thereto and compensation, triode Q201 is 2N60 triode.
Debug port mainly connects chip UC3842, optocoupler PC817, triode Q201, transformer T201, voltage stabilizing chip 7912, voltage stabilizing chip 7812, the situation of each chip can be detected fast before circuit runs, also can when power circuit work, the working condition of maintenance power circuit in time.
Described PWM changes output circuit and comprises trigger SN74V1G14, follow circuit, amplifying circuit and V/I circuit, the input end of described trigger SN74V1G14 is by resistance R201 connection signal input end, the power end of trigger SN74V1G14 connects reference voltage V Ref, reference voltage V Ref passes through electric capacity C201 ground connection, the earth terminal ground connection of trigger SN74V1G14, described follow circuit comprises resistance R202, the output terminal of resistance R202 end thereof contacts hair device SN74V1G14, the resistance R202 other end connects electric capacity C202 one end and resistance R203 one end respectively, electric capacity C202 other end ground connection, the resistance R203 other end connects electric capacity C203 one end and amplifier TLV2372 the 3rd pin respectively, electric capacity C203 other end ground connection, and amplifier TLV2372 second pin connects amplifier TLV2372 first pin, amplifier TLV2372 the 8th pin connects 12V voltage, amplifier TLV2372 the 4th pin ground connection, described amplifying circuit comprises resistance R205, resistance R205 one end ground connection, another termination of resistance R205 amplifier TLV2372 the 6th pin, amplifier TLV2372 the 5th pin connects amplifier TLV2372 first pin, amplifier TLV2372 the 6th pin connects amplifier TLV2372 the 7th pin by resistance R206, electric capacity C207 is in parallel with resistance R206, amplifier TLV2372 the 7th pin is by electric capacity C208 ground connection, amplifier TLV2372 the 7th pin connects diode D206 negative pole respectively, diode D207 positive pole, diode D208 positive pole, diode D206 plus earth, diode D207 negative pole connects 12V voltage, diode D208 negative pole connects 0-10V voltage signal output end by resistance R207, described V/I circuit comprises conversion chip XTR115, the VREF pin of conversion chip XTR115 meets reference voltage V Ref, the VIN pin of conversion chip XTR115 meets reference voltage V Ref by resistance R205, the VIN pin of conversion chip XTR115 connects amplifier TLV2372 first pin by resistance R204, the IP pin of conversion chip XTR115 meets reference voltage V Ref by electric capacity C205, the IP pin ground connection of conversion chip XTR115, the V+ pin of conversion chip XTR115 connects triode Q201 collector respectively, electric capacity C206 one end, an input end of diode D201 negative pole and full-wave rectification bridge, the base stage of triode Q201 connects the B pin of conversion chip XTR115, the emitter of triode Q201 connects the C pin of conversion chip XTR115, the electric capacity C206 other end, diode D201 positive pole is all connected the V-pin of conversion chip XTR115 with another input end of full-wave rectification bridge, full-wave rectification bridge is by diode D202, diode D203, diode D204 and diode D205 forms, the output terminal of full-wave rectification bridge exports 4-20mA current signal.
Wherein, resistance R201 is the current limiting safeguard resistor of 4.7K ohm, has two-stage RC filtering between trigger and amplifier, and resistance R205 connects 2.5V reference voltage, is used for ensureing that the voltage minimum of XTR115 input end is 0.4V.
Described simulated measurement input circuit comprises first, second, 3rd, four or four road signal conditioning circuit and A/D change-over circuit, described A/D change-over circuit comprises A/D chip ADS8341, 9th pin of A/D chip ADS8341 connects 5V voltage, the 1st pin ground connection of A/D chip ADS8341, the 10th of A/D chip ADS8341, 11 pin ground connection, the 12nd of A/D chip ADS8341, 13, 14, 15, 16 pins meet isolating chip ADUM1411, 8th pin of A/D chip ADS8341 connects 5V reference source, 5V reference source comprises electric capacity C209, electric capacity C209 one end connects the 8th pin and chip MAX6164 the 6th pin of A/D chip ADS8341 respectively, electric capacity C209 other end ground connection, electric capacity C2010 is in parallel with electric capacity C209, chip MAX6164 second pin connects 5V voltage, chip MAX6164 earth terminal ground connection, first signal conditioning circuit comprises resistance R2018, resistance R2018 mono-termination 4-20mA current signal input end, resistance R2018 other end ground connection, electric capacity C2012 is in parallel with resistance R2018, diode D209 positive pole connects 4-20mA current signal input end, diode D209 minus earth, the 13 pin connecting resistance R2013 one end of amplifier U1, the resistance R2013 other end is connecting resistance R2016 one end respectively, electric capacity C2011 one end, slide rheostat R2017 one end, another termination 5V voltage of resistance R2016, the electric capacity C2011 other end and slide rheostat R2017 other end ground connection, 12 pin of amplifier U1 connects 4-20mA current signal input end by resistance R2014, amplifier U1 the 12 pin is by resistance R2015 ground connection, 14 pin of amplifier U1 connects the 13 pin of amplifier U1 by resistance R2012, 14 pin of amplifier U1 connects the tenth pin of amplifier U1 by resistance R2011, 9th pin of amplifier U1 is by slide rheostat R2010 ground connection, 8th pin of amplifier U1 is by resistance R209 ground connection, 8th pin of amplifier U1 connects the 5th pin of A/D chip ADS8341 by resistance R208, secondary signal modulate circuit comprises resistance R2029, resistance R2029 mono-termination 4-20mA current signal input end, resistance R2029 other end ground connection, electric capacity C2014 is in parallel with resistance R2029, diode D2010 positive pole connects 4-20mA current signal input end, diode D2010 minus earth, the 13 pin connecting resistance R2024 one end of amplifier U2, the resistance R2024 other end is connecting resistance R2027 one end respectively, electric capacity C2013 one end, slide rheostat R2028 one end, another termination 5V voltage of resistance R2027, the electric capacity C2013 other end and slide rheostat R2028 other end ground connection, 12 pin of amplifier U2 connects 4-20mA current signal input end by resistance R2025, amplifier U2 the 12 pin is by resistance R2026 ground connection, 14 pin of amplifier U2 connects the 13 pin of amplifier U2 by resistance R2023, 14 pin of amplifier U2 connects the tenth pin of amplifier U1 by resistance R2022, 9th pin of amplifier U2 is by slide rheostat R2021 ground connection, 8th pin of amplifier U2 is by resistance R2020 ground connection, 8th pin of amplifier U2 connects the 4th pin of A/D chip ADS8341 by resistance R2019, 3rd signal conditioning circuit comprises resistance R2040, resistance R2040 mono-termination 4-20mA current signal input end, resistance R2040 other end ground connection, electric capacity C2016 is in parallel with resistance R2040, diode D2011 positive pole connects 4-20mA current signal input end, diode D2011 minus earth, the 13 pin connecting resistance R2035 one end of amplifier U3, the resistance R2035 other end is connecting resistance R2038 one end respectively, electric capacity C2015 one end, slide rheostat R2039 one end, another termination 5V voltage of resistance R2038, the electric capacity C2015 other end and slide rheostat R2039 other end ground connection, 12 pin of amplifier U3 connects 4-20mA current signal input end by resistance R2036, amplifier U3 the 12 pin is by resistance R2037 ground connection, 14 pin of amplifier U3 connects the 13 pin of amplifier U3 by resistance R2034, 14 pin of amplifier U3 connects the tenth pin of amplifier U3 by resistance R2033, 9th pin of amplifier U3 is by slide rheostat R2032 ground connection, 8th pin of amplifier U3 is by resistance R2031 ground connection, 8th pin of amplifier U3 connects the 3rd pin of A/D chip ADS8341 by resistance R2030, 4th signal conditioning circuit comprises resistance R2051, resistance R2051 mono-termination 4-20mA current signal input end, resistance R2051 other end ground connection, electric capacity C2018 is in parallel with resistance R2051, diode D2012 positive pole connects 4-20mA current signal input end, diode D2012 minus earth, the 13 pin connecting resistance R2046 one end of amplifier U4, the resistance R2046 other end is connecting resistance R2049 one end respectively, electric capacity C2017 one end, slide rheostat R2050 one end, another termination 5V voltage of resistance R2049, the electric capacity C2017 other end and slide rheostat R2050 other end ground connection, 12 pin of amplifier U4 connects 4-20mA current signal input end by resistance R2047, amplifier U4 the 12 pin is by resistance R2048 ground connection, 14 pin of amplifier U4 connects the 13 pin of amplifier U4 by resistance R2045, 14 pin of amplifier U4 connects the tenth pin of amplifier U4 by resistance R2044, 9th pin of amplifier U4 is by slide rheostat R2043 ground connection, 8th pin of amplifier U4 is by resistance R2042 ground connection, 8th pin of amplifier U4 connects the 2nd pin of A/D chip ADS8341 by resistance R2041.
After on-the-spot sensor collects signal; send 4-20mA current signal; after signal conditioning circuit receives signal, the voltage signal being converted into 0-5V after the process such as over-sampling, filtering, protection, difference, amplification arrives chip ADS8341, eventually passes magnetic coupling isolating chip and is transferred to single-chip microcomputer.
Cooling pump controller as shown in Figure 4, comprise STM32F103V676 single-chip microcomputer and power module, single-chip microcomputer is by RS485 interface junction chamber external environment acquisition module, single-chip microcomputer connects isolated can circuit by CAN, isolation C30AN circuit connects central air conditioner system master controller, single-chip microcomputer connects RS232 circuit and feedback data acquisition module by data line, RS232 circuit connects debug port, realize debug function, single-chip microcomputer connects host computer communication module respectively by spi bus, electric quantity acquisition module and signal output control module, electric quantity acquisition module can gather the power consumption situation of refrigeration fan in refrigerating water pump control procedure, the instruction of master controller can be sent to the performers such as refrigeration host computer by-pass valve control by signal output control module, host computer communication module connects refrigeration host computer, realize the data communication with refrigeration host computer, voltage and current signal change-over circuit is equipped with in described signal output control module and feedback data acquisition module.
Outdoor environment acquisition module comprises 3.3V feed circuit, process chip STM8L101, debugging interface SWIM, Acquisition Circuit, display circuit and telecommunication circuit, described power circuit comprises resistance R3010, resistance R3010 mono-section connects 5V voltage, the resistance R3010 other end connects electric capacity C3016 one end respectively, electric capacity C3017 one end, voltage stabilizing chip HT7533 second pin, the electric capacity C3016 other end, the electric capacity C3017 other end and the equal ground connection of voltage stabilizing chip HT7533 first pin, voltage stabilizing chip HT7533 the 3rd pin exports 3.3V voltage, voltage stabilizing chip HT753 the 3rd pin is by electric capacity C3018 ground connection, electric capacity C3019 and electric capacity C3020 is in parallel with electric capacity C3018 respectively, process chip STM8L101 the 8th pin connects 3.3V voltage, 3.3V voltage is by resistance in series R3013 and R3014 ground connection, debugging interface SWIM connection handling chip STM8L101, display circuit comprises driving HT1621B and display screen, HT1621B is driven to input termination process chip STM8L101, HT1621B is driven to export termination display screen, Acquisition Circuit comprises sensor SH10, two output terminals of sensor SH10 connect the 5th pin and the 6th pin of process chip STM8L101 respectively, 5th pin of process chip STM8L101 connects 3.3V voltage by resistance R3011, 6th pin of process chip STM8L101 connects 3.3V voltage by resistance R3012, described telecommunication circuit comprises 74HC3014G, 74HC3014G input end first pin connects chip STM8L101 first pin, 74HC3014G exports termination MAX3485 second pin and the 3rd pin, MAX3485 first pin connects chip STM8L101 second pin, MAX3485 the 7th pin is by resistance R3015 ground connection, MAX3485 the 7th pin connects the first output terminal by resistance R3017, MAX3485 the 6th pin connects 3.3V voltage by resistance R3016, MAX3485 the 6th pin connects the second output terminal by resistance R3018, first output terminal and the second output terminal are respectively by diode D308 and diode D307 ground connection.
During this modular design, need consider installation volume and gather accurate field requirement, seem simple circuit so devise, first this circuit takes comprehensive Temperature Humidity Sensor and low-power scm and the efficient and mu balanced circuit of small volume in fact.This circuit main advantage is to achieve accurate humiture collection when small volume and low power consumption, and is communicated with controller by communication bus.The power consumption of this circuit can low 0.2mW.Temperature accuracy 0.2 degree, the error of humidity 1%,
Voltage and current signal change-over circuit comprises resistance R3019, resistance R3019 mono-termination 0-5V voltage signal, the resistance R3019 other end is connecting resistance R3021 one end respectively, amplifier LM358 second pin, amplifier LM358 the 3rd pin is by resistance R3020 ground connection, the resistance R3021 other end connects amplifier LM358 first pin by slide rheostat R3022, amplifier LM358 first pin connects amplifier LM358 the 6th pin by resistance R3023, amplifier LM358 the 8th pin connects 12V voltage, amplifier LM358 the 5th pin is by resistance R3025 ground connection, amplifier LM358 the 5th pin connects diode D309 negative pole by resistance R3024, diode D309 plus earth, amplifier LM358 the 6th pin is connecting resistance R3030 one end respectively, resistance R3028 one end, the resistance R3028 other end connects triode Q301 emitter by slide rheostat R3029, the resistance R3030 other end is connecting resistance R3032 one end respectively, slide rheostat R3031 one end, voltage stabilizing diode D3012 positive pole, another termination 12V voltage of resistance R3032, the slide rheostat R3031 other end and the equal ground connection of voltage stabilizing diode D3012 negative pole, amplifier LM358 the 7th pin connects triode Q301 base stage by resistance R3026, triode Q301 collector connects 12V voltage, triode Q301 emitter connects diode D3010 positive pole respectively, resistance R3027 one end, diode D3010 negative pole connects triode Q301 base stage, the resistance R3027 other end connects diode D309 negative pole and diode D3011 positive pole respectively, diode D3011 negative pole connects 4-20mA current signal by fuse.
Technological parameter acquisition module comprises single-chip microcomputer C8051F001, voltage reference circuit, switching signal control circuit and some process signal parameter acquisition circuit, voltage reference circuit adopts MAX6250 chip as core devices, switching signal control circuit utilizes optocoupler PC30817 as control device, process signal parameter acquisition circuit comprises diode D3016, diode D3016 positive pole connects first input end, diode D3016 negative pole connects RCV420 the 3rd pin by fuse, voltage stabilizing diode D3015 negative pole connects diode D3016 negative pole, voltage stabilizing diode D3015 positive pole connects the second input end and RCV420 first pin respectively, RCV420 second pin and the 5th pin ground connection, RCV420 the tenth pin and 11 pins all meet RV, RCV420 the 12 pin and 13 pins all connect OP07 first pin, OP07 first pin connects OP07 second pin, OP07 the 3rd pin is by resistance R3034 ground connection, OP07 the 3rd pin meets RV by resistance R3033, RCV420 the 15 pin and 14 pins all connect interface microcontroller, diode D3013 negative pole connects RCV420 14 pin, diode D3013 positive pole connects 5V voltage, diode D3014 positive pole connects RCV420 14 pin, diode D3014 minus earth.
Have employed independently that MC30U is for collection site analog data, such analog data can carry out on-the-spot algorithm process and adopt the AD collecting unit in single-chip microcomputer to gather, and achieves low cost collection.Have employed independent reference source and be supplied to single-chip microcomputer, realize high precision conversion, and ensure the stability of collection.Adopt RCV420 conversion chip, realize high precision 4 ~ 20MA and change 0 ~ 5V, and the measurement range expanded.Improve precision.Peripheral employing filtering circuit, eliminates interference.
Cooling blower controller as Fig. 5 comprises power circuit, single-chip microcomputer, technological parameter acquisition module, environmental parameter acquisition module, isolated can circuit, blower fan protection circuit, electric quantity acquisition circuit and output module, described power circuit supply 5V voltage, described single-chip microcomputer is chip STM8S208MB, described technological parameter acquisition module and isolated can circuit are electrically connected on single-chip microcomputer, described environmental parameter acquisition module is connected on single-chip microcomputer by 485 circuit, described blower fan protection circuit by TTL data-signal and single-chip microcomputer mutual, described electric quantity acquisition module is connected with single-chip microcomputer volume by spi bus, described output module comprises D/A chip and V/I change-over circuit, the input end of described D/A chip connects single-chip microcomputer, the output terminal of described D/A chip connects V/I change-over circuit input end, wherein, described electric quantity acquisition module utilizes chip ATT7022 as acquisition chip, described D/A chip is TLV5616.
Described power circuit is controller supply 5V voltage, described single-chip microcomputer is chip STM8S208MB, described technological parameter acquisition module and isolated can circuit are electrically connected on single-chip microcomputer, described environmental parameter acquisition module is connected on single-chip microcomputer by 485 circuit, described blower fan protection circuit by TTL data-signal and single-chip microcomputer mutual, described electric quantity acquisition module is connected with single-chip microcomputer volume by spi bus, described output module comprises D/A chip and V/I change-over circuit, the input end of described D/A chip connects single-chip microcomputer, the output terminal of described D/A chip connects V/I change-over circuit input end.Wherein, described electric quantity acquisition module utilizes chip ATT7022 as acquisition chip, and described D/A chip is TLV5616.
During use, isolated can circuit is connected with core controller, realize with the director data of core controller mutual, the DataBase combining of the data such as technological parameter acquisition module and recording process requirement, obtain technological parameter data, environmental parameter acquisition module connects the sensor such as pressure, humiture being arranged in the external world, obtain the parameter of external environment, these parameters all can pass to core controller and carry out analyzing, processing, and then the instruction that core controller feeds back is sent to blower fan by output module by single-chip microcomputer.
In above process, electric quantity acquisition circuit major function for realization to the blower fan of cooling tower that controller controls with adding up and the monitoring of electrical quantity.This main circuit will adopt professional chip ATT7022 to gather, and the electrical quantity of collection is more, and outer net devises accurate voltage collection circuit, realizes precise acquisition and statistics.Devise mutual inductor in current collection circuit, achieve isolation, effectively avoid interference.Collection terminal devises clamping circuit, effectively avoids high pressure crushing bad acquisition chip.
Described blower fan protection circuit comprises chip NE556, first pin of chip NE556 connects chip NE556 second pin and the 6th pin by resistance R405, 6th pin of chip NE556 is by electric capacity C402 ground connection, chip NE556 the 3rd pin connects voltage stabilizing diode D402 negative pole, voltage stabilizing diode D402 plus earth, chip NE556 first pin connects the mobile terminal of slide rheostat R402 by resistance R404, a stiff end of slide rheostat R402 is by resistance R403 ground connection, another stiff end contact resistance R401 one end of slide rheostat R402, the resistance R401 other end connects diode D401 negative pole and electric capacity C401 one end respectively, electric capacity C401 other end ground connection, diode D401 positive pole connects an output terminal of current transformer, another output head grounding of current transformer, 4th pin of chip NE556, tenth pin is all connected 12V voltage with the 14 pin, 12V voltage is by electric capacity C407 ground connection, resistance R4016 mono-termination 12V voltage, the positive pole of resistance R4016 other end sending and receiving optical diode LED402, the negative pole of light emitting diode LED402 connects one end of chip NE556 the 5th pin and slide rheostat R4012 respectively, slide rheostat R4012 other end connecting resistance R4011 one end, another terminating diode of resistance R4011 D408 negative pole, diode D408 positive pole connects voltage stabilizing diode D407 negative pole respectively, chip NE556 the 8th pin, chip NE556 the 12 pin, voltage stabilizing diode D407 plus earth, diode D403 positive pole connects an output terminal of voltage transformer pt 1, diode D403 negative pole connects electric capacity C403 one end and resistance R406 one end respectively, the electric capacity C403 other end connects another output terminal of voltage transformer pt 401 and triode Q401 emitter respectively, another termination triode of resistance R406 Q401 base stage, triode Q401 collector connects 12V voltage, triode Q401 emitter connects triode Q402 collector, triode Q402 base stage connecting resistance R407 one end, the resistance R407 other end connects electric capacity C404 one end and diode D404 negative pole respectively, diode D404 positive pole connects voltage transformer pt 402 1 output terminals, the electric capacity C404 other end connects another output terminal of voltage transformer pt 402 and triode Q402 emitter respectively, triode Q402 emitter connects triode Q403 collector, triode Q403 base stage connecting resistance R408 one end, another terminating diode of resistance R408 D405 negative pole, diode D405 positive pole connects voltage transformer pt 403 1 output terminals, electric capacity C405 mono-terminating diode D405 negative pole, the electric capacity C405 other end connects another output terminal of voltage transformer (VT) RT403 and triode Q403 emitter respectively, triode Q403 emitter is by resistance R4010 ground connection, triode Q403 emitter is contact resistance R409 one end and diode D406 negative pole respectively, the resistance R409 other end connects light emitting diode LED401 negative pole, light emitting diode LED401 positive pole connects 12V voltage, diode D406 positive pole connects electric capacity C406 one end and chip NE556 the 8th pin respectively, another termination 12V voltage of electric capacity C406, diode D406 puts into negative pole and connects single-chip microcomputer by resistance R4013, 5th pin of chip NE556 connects single-chip microcomputer by resistance R4015, chip NE556 the 9th pin connects single-chip microcomputer by resistance R4014.
Blower fan protection circuit mainly completes to be protected blower fan of cooling tower; the overcurrent of main inspection blower fan; open-phase protection; realize blower fan defencive function, because blower fan is in operation process, larger by ectocine; devise guard time regulatory function; can carry out delay protection according to the applicable cases at scene, the on-the-spot each project of power of fan is not quite similar, and devises protection limitation function.Can be connected with single-chip microcomputer simultaneously, realize remote monitoring, advantage, adopt and reasonably design, defencive function is complete, antijamming capability is higher.Peripheral components is less, realizes cost simple, possesses situ configuration regulatory function.
Except structure of the present invention, all the other are prior art.
The above is the preferred embodiment of the present invention, and for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications are also regarded as protection scope of the present invention.
Claims (10)
1. central air conditioning control and management system, it is characterized in that, comprise background control center and front-end control cabinet, described background control center comprises data processing server, display screen, data acquisition unit and recording controller, be used for acquisition and processing data, and by equipment running status display on a display screen, described front-end control cabinet comprises the total cabinet of control of installation system efficiency controller, the cold water switch board of water supply pump controller is installed, the cooling pump switch board of cooling pump controller is installed, the cooling blower switch board of cooling blower controller is installed, described system energy efficiency controller is connected with background control center by communication host, described system energy efficiency controller is respectively by CAN circuit and cooling pump controller, cooling blower controller, water supply pump controller connects, the realization of water supply pump switch board is to the state-detection of handpiece Water Chilling Units and control, the realization of cooling pump switch board is to the state-detection of refrigeration host computer and control, the realization of cooling blower switch board is to the state-detection of blower fan and control, control total cabinet by whole data upload to background control center, analysis in conjunction with background control center judges, realize the allotment to each energy efficiency of equipment in system and accurately control.
2. central air conditioning control and management system according to claim 1, is characterized in that, described communication host also connects energy statistics platform by energy statistics bus.
3. central air conditioning control and management system according to claim 1 and 2, it is characterized in that, described efficiency controller comprises control module, power module, Ethernet unit, isolate Unit 485, USB unit, SD card, CAN buffer circuit, RS485 buffer circuit, output control unit, Input Control Element, Isolation input unit and isolation and amplifier unit, described control module comprises the first single-chip microcomputer, second singlechip, dual port RAM and adjunct unit, the first described single-chip microcomputer and second singlechip carry out two machine communication by dual port RAM, the first described single-chip microcomputer and second singlechip are connected an adjunct unit respectively, described adjunct unit comprises clock circuit, watchdog circuit, storer, reference source circuit, described Ethernet unit, isolate Unit 485, USB unit is connected the first single-chip microcomputer respectively with SD card, described CAN buffer circuit, RS485 buffer circuit, output control unit, Input Control Element, Isolation input unit is connected second singlechip respectively with isolation and amplifier unit, described Input Control Element comprises A/D modular converter, signal processing circuit, A/D modular converter output terminal connects second singlechip by SPI line, described signal processing circuit output terminal connects A/D modular converter input end, described output control unit comprises D/A modular converter, voltage-current converter circuit, D/A modular converter input end connects second singlechip by SPI line, described voltage-current converter circuit connects D/A modular converter output terminal, described Isolation input unit connects Wiring port, described isolation and amplifier unit connects driving circuit.
4. central air conditioning control and management system according to claim 3, is characterized in that, described first single-chip microcomputer and second singlechip all adopt chip STM32F407VGT6.
5. central air conditioning control and management system according to claim 4, is characterized in that, efficiency controller also comprises expanding element, and described expanding element connects the first single-chip microcomputer and second singlechip respectively by bus.
6. central air conditioning control and management system according to claim 1 and 2, it is characterized in that, described water supply pump controller comprises control module, switching input module, switching value output module, RS485 protection circuit, CAN protection circuit, level shifting circuit, simulated measurement input circuit and PWM change output circuit, described control module comprises STM32F103VBT6 single-chip microcomputer and FM3116 peripheral circuit, described switching input module is connected on single-chip microcomputer by Isolation input circuit, described switching value output module is connected on single-chip microcomputer by spacing output circuit, described RS485 protection circuit, CAN protection circuit, level shifting circuit, simulated measurement input circuit is connected on single-chip microcomputer respectively by a buffer circuit, the input end that PWM changes output circuit connects single-chip microcomputer, the output terminal that PWM changes output circuit exports 0-10V voltage signal and 4-20mA current signal.
7. central air conditioning control and management system according to claim 1 and 2, it is characterized in that, described cooling pump controller comprises STM32F103V676 single-chip microcomputer and power module, single-chip microcomputer is by RS485 interface junction chamber external environment acquisition module, single-chip microcomputer connects RS232 circuit and feedback data acquisition module by data line, single-chip microcomputer connects host computer communication module, electric quantity acquisition module and signal output control module respectively by spi bus, is equipped with voltage and current signal change-over circuit in described signal output control module and feedback data acquisition module.
8. central air conditioning control and management system according to claim 1 and 2, it is characterized in that, described cooling blower controller comprises power circuit, single-chip microcomputer, technological parameter acquisition module, environmental parameter acquisition module, isolated can circuit, blower fan protection circuit, electric quantity acquisition circuit and output module, described power circuit supply 5V voltage, described single-chip microcomputer is chip STM8S208MB, described technological parameter acquisition module and isolated can circuit are electrically connected on single-chip microcomputer, described environmental parameter acquisition module is connected on single-chip microcomputer by 485 circuit, described blower fan protection circuit by TTL data-signal and single-chip microcomputer mutual, described electric quantity acquisition module is connected with single-chip microcomputer volume by spi bus, described output module comprises D/A chip and V/I change-over circuit, the input end of described D/A chip connects single-chip microcomputer, the output terminal of described D/A chip connects V/I change-over circuit input end.
9. central air conditioning control and management system according to claim 8, is characterized in that, described electric quantity acquisition module utilizes chip ATT7022 as acquisition chip.
10. central air conditioning control and management system according to claim 8, is characterized in that, described D/A chip is TLV5616.
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