CN104596053A - Small ventilation hood controller with CIT capable of achieving variable air rate adjusting function - Google Patents
Small ventilation hood controller with CIT capable of achieving variable air rate adjusting function Download PDFInfo
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- CN104596053A CN104596053A CN201410734122.3A CN201410734122A CN104596053A CN 104596053 A CN104596053 A CN 104596053A CN 201410734122 A CN201410734122 A CN 201410734122A CN 104596053 A CN104596053 A CN 104596053A
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/0001—Control or safety arrangements for ventilation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Fluid Mechanics (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a small ventilation hood controller with a CIT capable of achieving a variable air rate adjusting function. The small ventilation hood controller comprises a face velocity sensor, a pressure sensor, a first ADC circuit, a second ADC circuit, a DAC circuit, an ultrasonic module, a first single chip microcomputer, a second single chip microcomputer, an upper computer, a matrix switch circuit, an execution circuit and a power switching circuit. The first single chip microcomputer is externally connected with the matrix switch circuit and the execution circuit. The execution circuit comprises a first motor which controls the opening degree of a door, a second motor which controls the opening degree of an air valve, lighting equipment and alarming equipment. The face velocity sensor and the pressure sensor are connected with the second single chip microcomputer through the first ADC circuit and the second ADC circuit respectively, the ultrasonic module is connected with the second single chip microcomputer, and the upper computer is connected with the second single chip microcomputer through the DAC circuit. The first single chip microcomputer is in communication connection with the second single chip microcomputer. According to the small ventilation hood controller, the air volume of a ventilation hood can be automatically adjusted, the integration degree is high, and the size of the ventilation hood can be better decreased.
Description
Technical field
The present invention relates to Boiler pressure control technical field, particularly relate to the vent cabinet small controller that a kind of CIT has variable air rate regulatory function.
Background technology
Traditional laboratory ventilation cabinet equipment mainly completes and carries out the function such as controlling to illumination, air draft, additional supply switch, these functions manually switch realize, its product integrated level is low, power circuit is in disorder, maintenance is complicated, and product structure is simple, cannot upgrade, the scope of application is little, cannot satisfy the demand.
Summary of the invention
Based on the technical problem that background technology exists, the present invention proposes the vent cabinet small controller that a kind of CIT has variable air rate regulatory function, can realize vent cabinet air quantity and automatically regulate, integrated level is high, is conducive to reducing vent cabinet volume.
A kind of CIT that the present invention proposes has the vent cabinet small controller of variable air rate regulatory function, comprises face air velocity transducer, pressure sensor, an ADC analog to digital conversion circuit, the 2nd ADC analog to digital conversion circuit, DAC D/A converting circuit, ultrasonic wave module, the first single-chip microcomputer, second singlechip, host computer, switch matrix circuit, executive circuit and power-switching circuit;
First single-chip microcomputer external matrix on-off circuit, executive circuit, executive circuit comprises the first motor of control gate aperture, the second motor controlling valve area, lighting apparatus and warning device;
Face air velocity transducer is connected second singlechip respectively by an ADC analog to digital conversion circuit with the 2nd ADC analog to digital conversion circuit with pressure sensor, and ultrasonic wave module connects second singlechip, and host computer connects second singlechip by DAC D/A converting circuit;
First single-chip microcomputer and second singlechip communication connection;
Civil power is converted to galvanic power-switching circuit to connect an ADC analog to digital conversion circuit, the 2nd ADC analog to digital conversion circuit, DAC D/A converting circuit, ultrasonic wave module, the first single-chip microcomputer and second singlechip respectively and power.
Preferably, the first single-chip microcomputer and second singlechip all adopt STC89C52 chip.
Preferably, external 4 × 4 switch matrix circuits of first single-chip microcomputer P1.0, P1.1, P1.2, P1.3, P1.4, P1.5, P1.6, P1.7 pin; First single-chip microcomputer P0.0, P0.1, P0.2, P0.3, P0.4, P0.5, P0.6, P0.7 pin connects the first relay, the second relay, the 3rd relay, the 4th relay, the 5th relay, the 6th relay, the 7th relay and the 8th relay respectively; First motor connects normally opened contact and second relay normally open contact of the first relay respectively, lighting apparatus connects the normally opened contact of the 3rd relay, second motor connects the normally opened contact of the 4th relay and the normally opened contact of the 5th relay respectively, and warning device connects the normally opened contact of the 6th relay.
Preferably, first relay, the second relay, the 3rd relay, the 4th relay, the 5th relay, the 6th relay, the 7th relay and the 8th relay connect direct current respectively by a pull-up resistor, and the first motor, the second motor, lighting apparatus and warning device are by mains-supplied.
Preferably, one ADC analog to digital conversion circuit and the 2nd ADC analog to digital conversion circuit are realized by an ADC0804 chip and the 2nd ADC0804 chip external circuits respectively, wherein, ADC0804 chip VREF/2 pin connects direct current by the first resistance and by the second resistance eutral grounding, CLK IN pin is by the 11 capacity earth, CLK R pin connects CLK IN pin by the 3rd resistance, AGND pin ground connection, DB0, DB1, DB2, DB3, DB4, DB5, DB6, DB7 pin connects the P1.0 of second singlechip respectively, P1.1, P1.2, P1.3, P1.4, P1.5, P1.6, P1.7 pin, between the VIN+ pin that face air velocity transducer is connected to an ADC chip and VIN-pin, between the VIN+ pin that pressure sensor is connected to the 2nd ADC0804 chip and VIN-pin, P2.1 pin and the P2.2 pin of second singlechip are connected the CS pin of an ADC0804 chip and the 2nd ADC0804 chip respectively.
Preferably, ultrasonic wave module adopts HC-SR04 chip, and its ECHO pin connects the INT0 pin of second singlechip, and the TRTG pin of ultrasonic wave module connects the P2.0 pin of second singlechip.
Preferably, DAC D/A converting circuit is realized by max515 chip, its REFIN pin connects direct current by the 4th resistance and by the 5th resistance eutral grounding, its SCLK pin, CS pin and DIN pin are connected the P2.3 pin of second singlechip, P2.4 pin and P2.5 pin respectively, and its OUT pin connects host computer.
Preferably, power-switching circuit mainly comprises transformer, the first diode, the second diode, the 3rd diode and the 4th diode, the first Voltage stabilizing module, the second Voltage stabilizing module and the 3rd Voltage stabilizing module; First diode, the second diode, the 3rd diode and the 4th diode are connected into loop successively, two outputs of transformer secondary coil are connected between the first diode and the second diode and between the 3rd diode and the 4th diode, and transformer has earth terminal and its primary coil access 220V alternating current; The input of the first Voltage stabilizing module is connected between the second diode and the 4th diode, and respectively by the first electric capacity and the 3rd capacity earth, its output connects the first DC output end by the 6th resistance, and respectively by the 5th electric capacity and the 7th capacity earth; The input of the second Voltage stabilizing module is connected between the first diode and the 3rd diode, and respectively by the second electric capacity and the 4th capacity earth, its output connects the second DC output end by the 7th resistance, and respectively by the 6th electric capacity and the 8th capacity earth; 3rd Voltage stabilizing module input connects the first Voltage stabilizing module output, and by the 9th capacity earth, its output as the 3rd DC output end, and passes through the tenth capacity earth.
Preferably, the model of the first Voltage stabilizing module and the second Voltage stabilizing module is the model of the 7815, three Voltage stabilizing module is 7805.
Preferably, alarm module is buzzer.
The invention provides and automatically control and Non-follow control two kinds of air quantity control methods, flexibility ratio is high, applied widely; And adopt the integrated chip such as single-chip microcomputer, ADC chip to realize, and improve circuit level, reduce volume, be convenient to install and use, applied widely.In the present invention, air quantity self-regulation is realized by the mode monitored in real time, automatically calculate, automaticity is high, precision is high, be conducive to promoting operating efficiency, and there are control gate aperture and valve area two kinds of regulative modes, and opposite house aperture and valve area are monitored in real time, be conducive to the situation avoiding door and air-valve maximal work, avoid the limit to damage.
Accompanying drawing explanation
Fig. 1 is the vent cabinet small controller power-switching circuit principle schematic that a kind of CIT that the present invention proposes has variable air rate regulatory function;
Fig. 2 is the vent cabinet small controller local circuit principle schematic that a kind of CIT that the present invention proposes has variable air rate regulatory function;
Fig. 3 is the vent cabinet small controller executive circuit schematic diagram that a kind of CIT that the present invention proposes has variable air rate regulatory function;
Fig. 4 is the vent cabinet small controller local circuit principle schematic that a kind of CIT that the present invention proposes has variable air rate regulatory function.
Detailed description of the invention
A kind of CIT that the present invention proposes has the vent cabinet small controller of variable air rate regulatory function, comprises face air velocity transducer, pressure sensor, an ADC analog to digital conversion circuit, the 2nd ADC analog to digital conversion circuit, DAC D/A converting circuit, ultrasonic wave module, the first single-chip microcomputer, second singlechip, host computer, switch matrix circuit, executive circuit and power-switching circuit.
First single-chip microcomputer external matrix on-off circuit, executive circuit, executive circuit comprises the first motor M 1 of control gate aperture, the second motor M 2 controlling valve area, lighting apparatus and warning device.
Face air velocity transducer is for detecting wind speed, and pressure sensor is pressed for detecting in airduct.Face air velocity transducer is connected second singlechip respectively by an ADC analog to digital conversion circuit with the 2nd ADC analog to digital conversion circuit with pressure sensor.One ADC analog to digital conversion circuit and the 2nd ADC modulus circuit are sent to second singlechip after respectively the face wind velocity signal received and pressure signal being converted to data signal.
Ultrasonic wave module connects second singlechip, after second singlechip sends instruction to ultrasonic wave module, ultrasonic wave module launches ultrasonic wave, ultrasonic wave returns after meeting with obstruction, ultrasonic wave module sends feedback information to second singlechip, and second singlechip calculates with the distance of door according to ultrasonic echo time to judge the aperture of door.
Host computer connects second singlechip by DAC D/A converting circuit, host computer is sent to show after the face wind speed biography value that second singlechip calculates by DAC D/A converting circuit and the opening value of door are converted to analog signal, host computer can adopt PLC (Programmable Logic Controller, programmable logic controller (PLC)) chip.
First single-chip microcomputer and second singlechip communication connection also all adopt STC89C52 chip, and STC89C52 chip X1, X2 pin connects minimum system, and its reset pin connects reset circuit.
Civil power is converted to galvanic power-switching circuit to connect an ADC analog to digital conversion circuit, the 2nd ADC analog to digital conversion circuit, DAC D/A converting circuit, ultrasonic wave module, the first single-chip microcomputer and second singlechip respectively and power.
As shown in Figure 1, power-switching circuit mainly comprises transformer T1, the first diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4, the first Voltage stabilizing module U1, the second Voltage stabilizing module U2 and the 3rd Voltage stabilizing module U3.
First diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4 are connected into loop successively.Two outputs of transformer T1 secondary coil are connected between the first diode D1 and the second diode D2 and between the 3rd diode D3 and the 4th diode D4, and transformer T1 has earth terminal and its primary coil access 220V alternating current.
The input of the first Voltage stabilizing module U1 is connected between the second diode D2 and the 4th diode D4, and respectively by the first electric capacity C1 and the 3rd electric capacity C3 ground connection, its output connects the first DC output end by the 6th resistance R6, and respectively by the 5th electric capacity C5 and the 7th electric capacity C7 ground connection.
The input of the second Voltage stabilizing module U2 is connected between the first diode D1 and the 3rd diode D3, and respectively by the second electric capacity C2 and the 4th electric capacity C4 ground connection, its output connects the second DC output end by the 7th resistance R7, and respectively by the 6th electric capacity C6 and the 8th electric capacity C8 ground connection.
3rd Voltage stabilizing module U3 input connects the first Voltage stabilizing module U1 output, and by the 9th electric capacity C9 ground connection, its output as the 3rd DC output end, and passes through the tenth electric capacity C10 ground connection.
The model of the first diode D1, the second diode D2, the 3rd diode D3 and the 4th diode D4 is 1N404.The model of the first Voltage stabilizing module U1 and the second Voltage stabilizing module U2 is the model of the 7815, three Voltage stabilizing module U3 is 7805.
The specification of the first electric capacity C1 and the second electric capacity C2 is 4700uF/35V; The specification of the 3rd electric capacity C3, the 4th electric capacity C4, the 7th electric capacity C7 and the 8th electric capacity C8 is 0.1uF; The specification of the 5th electric capacity C5 and the 6th electric capacity C6 is 220uF/25V; The specification of the 9th electric capacity C9 and the tenth electric capacity C10 is 220uF.The resistance of the 6th resistance R6 and the 7th resistance R7 is 10K Ω.
Exportable+15V the direct current of this power-switching circuit first DC output end, exportable+5V the direct current of 3rd DC output end, the direct current incoming end of an ADC analog to digital conversion circuit, the 2nd ADC analog to digital conversion circuit, DAC D/A converting circuit, ultrasonic wave module, the first single-chip microcomputer and second singlechip can be selected to be connected to the first DC output end or the 3rd DC output end as required.This power-switching circuit second DC output end exportable-15V direct current is as subsequent use.
As shown in Figure 2 and Figure 3, external 4 × 4 switch matrix circuits of first single-chip microcomputer P1.0, P1.1, P1.2, P1.3, P1.4, P1.5, P1.6, P1.7 pin, for manual input signals.First single-chip microcomputer P0.0, P0.1, P0.2, P0.3, P0.4, P0.5, P0.6, P0.7 pin connects the first relay k1, the second relay k2, the 3rd relay k3, the 4th relay k4, the 5th relay k5, the 6th relay k6, the 7th relay k7 and the 8th relay k8 respectively.
First motor M 1 connects normally opened contact K1 and the second relay k2 normally opened contact K2 of the first relay k1 respectively, with the switch according to first monolithic P0.0, P0.1 pin output signal control gate.Lighting apparatus connects the normally opened contact K3 of the 3rd relay k3, to control the switch of lighting apparatus according to the first monolithic P0.2 pin output signal.Second motor M 2 connects the normally opened contact K4 of the 4th relay k4 and the normally opened contact K5 of the 5th relay k5 respectively, to control the switch of air-valve according to first monolithic P0.3, P0.4 pin output signal, carries out air quantity adjustment.Warning device connects the normally opened contact K6 of the 6th relay k6, arouses attention to control warning device warning according to the first monolithic P0.5 pin output signal.First monolithic P0.6, P0.7 pin is as spare control signal output.
It should be noted that, first relay k1, the second relay k2, the 3rd relay k3, the 4th relay k4, the 5th relay k5, the 6th relay k6, the 7th relay k7 and the 8th relay k8 connect direct current respectively by a pull-up resistor, and the first motor M 1, second motor M 2, lighting apparatus and warning device are directly powered by civil power.
As shown in Figure 4, an ADC analog to digital conversion circuit and the 2nd ADC analog to digital conversion circuit are realized by an ADC0804 chip and the 2nd ADC0804 chip external circuits respectively.The external circuits of the one ADC0804 chip and the 2nd ADC0804 chip is embodied as, VREF/2 pin connects direct current by the first resistance R1 and by the second resistance R2 ground connection, CLK IN pin is by the 11 electric capacity C11 ground connection, CLK R pin connects CLK IN pin by the 3rd resistance R3, AGND pin ground connection, DB0, DB1, DB2, DB3, DB4, DB5, DB6, DB7 pin connects P1.0, P1.1, P1.2, P1.3, P1.4, P1.5, P1.6, P1.7 pin of second singlechip respectively.The CS pin that P2.1 pin and the P2.2 pin of second singlechip are connected an ADC0804 chip and the 2nd ADC0804 chip respectively carries out sheet choosing.
Between the VIN+ pin that face air velocity transducer is connected to an ADC chip and VIN-pin, between the VIN+ pin that pressure sensor is connected to the 2nd ADC0804 chip and VIN-pin.
Ultrasonic wave module adopts HC-SR04 chip, and its ECHO pin connects the INT0 pin of second singlechip, and the TRTG pin of ultrasonic wave module connects the P2.0 pin of second singlechip, to carry out two-way communication with second singlechip.
DAC D/A converting circuit is realized by max515 chip, its REFIN pin connects direct current by the 4th resistance R4 and by the 5th resistance R5 ground connection, its SCLK pin, CS pin and DIN pin are connected the P2.3 pin of second singlechip, P2.4 pin and P2.5 pin respectively, and its OUT pin connects host computer.
When this CIT has the vent cabinet small controller work of variable air rate regulatory function, second singlechip calculates the aperture of door by controlling ultrasonic wave module work, and by pressure in face air velocity transducer and pressure monitor sensor wind speed and airduct, and with the first single chip communication, the aperture that the first motor M 1 in first Single-chip Controlling executive circuit and the second motor M 2 work with adjusting air valve aperture and door, to realize the adjustment of air quantity; When the aperture of door reaches the limit values, first Single-chip Controlling second motor M 2 works and realizes the adjustment of air quantity with adjusting air valve aperture, when pressure sensor monitoring to airduct in pressure reach the limit values time, the first Single-chip Controlling first motor M 1 works and realizes the adjustment of air quantity with the aperture of adjustment doors; In addition, also executive circuit work can be controlled by switch matrix circuit manual input signals.First single-chip microcomputer also controls photo apparatus and warning device work according to the signal of communication of second singlechip or by the signal that switch matrix circuit manually inputs, and such as, when wind speed reaches the limit values, warning device is reported to the police to arouse attention.The aperture of host computer to wind speed and door shows to arouse attention.
Present embodiments provide for and automatically control and Non-follow control two kinds of air quantity control methods, flexibility ratio is high, applied widely.Present embodiment adopts the integrated chip such as single-chip microcomputer, ADC chip to realize, and improves circuit level, reduces volume, be convenient to install and use, applied widely.Present embodiment realizes air quantity self-regulation by the mode of monitoring in real time, calculating automatically, automaticity is high, precision is high, be conducive to promoting operating efficiency, and there are control gate aperture and valve area two kinds of regulative modes, and it is monitored in real time, be conducive to the situation avoiding door and air-valve maximal work, avoid the limit to damage.
In present embodiment, lighting apparatus adopts electric light, and warning device adopts buzzer.
The above; be only the present invention's preferably detailed description of the invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to according to technical scheme of the present invention and inventive concept thereof and replace or change, all should be encompassed within protection scope of the present invention.
Claims (10)
1. CIT has a vent cabinet small controller for variable air rate regulatory function, it is characterized in that, comprising:
Face air velocity transducer, pressure sensor, an ADC analog to digital conversion circuit, the 2nd ADC analog to digital conversion circuit, DAC D/A converting circuit, ultrasonic wave module, the first single-chip microcomputer, second singlechip, host computer, switch matrix circuit, executive circuit and power-switching circuit;
First single-chip microcomputer external matrix on-off circuit, executive circuit, executive circuit comprises first motor (M1) of control gate aperture, the second motor (M2) controlling valve area, lighting apparatus and warning device;
Face air velocity transducer is connected second singlechip respectively by an ADC analog to digital conversion circuit with the 2nd ADC analog to digital conversion circuit with pressure sensor, and ultrasonic wave module connects second singlechip, and host computer connects second singlechip by DAC D/A converting circuit;
First single-chip microcomputer and second singlechip communication connection;
Civil power is converted to galvanic power-switching circuit to connect an ADC analog to digital conversion circuit, the 2nd ADC analog to digital conversion circuit, DAC D/A converting circuit, ultrasonic wave module, the first single-chip microcomputer and second singlechip respectively and power.
2. CIT as claimed in claim 1 has the vent cabinet small controller of variable air rate regulatory function, and it is characterized in that, the first single-chip microcomputer and second singlechip all adopt STC89C52 chip.
3. CIT as claimed in claim 2 has the vent cabinet small controller of variable air rate regulatory function, it is characterized in that, external 4 × 4 switch matrix circuits of first single-chip microcomputer P1.0, P1.1, P1.2, P1.3, P1.4, P1.5, P1.6, P1.7 pin; First single-chip microcomputer P0.0, P0.1, P0.2, P0.3, P0.4, P0.5, P0.6, P0.7 pin connects the first relay (k1), the second relay (k2), the 3rd relay (k3), the 4th relay (k4), the 5th relay (k5), the 6th relay (k6), the 7th relay (k7) and the 8th relay (k8) respectively; First motor (M1) connects normally opened contact (K1) and the second relay (k2) normally opened contact (K2) of the first relay (k1) respectively, lighting apparatus connects the normally opened contact (K3) of the 3rd relay (k3), second motor (M2) connects the normally opened contact (K4) of the 4th relay (k4) and the normally opened contact (K5) of the 5th relay (k5) respectively, and warning device connects the normally opened contact (K6) of the 6th relay (k6).
4. CIT as claimed in claim 3 has the vent cabinet small controller of variable air rate regulatory function, it is characterized in that, first relay (k1), the second relay (k2), the 3rd relay (k3), the 4th relay (k4), the 5th relay (k5), the 6th relay (k6), the 7th relay (k7) and the 8th relay (k8) connect direct current respectively by a pull-up resistor, and the first motor (M1), the second motor (M2), lighting apparatus and warning device are by mains-supplied.
5. CIT as claimed in claim 2 has the vent cabinet small controller of variable air rate regulatory function, it is characterized in that, one ADC analog to digital conversion circuit and the 2nd ADC analog to digital conversion circuit are realized by an ADC0804 chip and the 2nd ADC0804 chip external circuits respectively, wherein, ADC0804 chip VREF/2 pin connects direct current and by the second resistance (R2) ground connection by the first resistance (R1), CLK IN pin is by the 11 electric capacity (C11) ground connection, CLK R pin connects CLK IN pin by the 3rd resistance (R3), AGND pin ground connection, DB0, DB1, DB2, DB3, DB4, DB5, DB6, DB7 pin connects the P1.0 of second singlechip respectively, P1.1, P1.2, P1.3, P1.4, P1.5, P1.6, P1.7 pin, between the VIN+ pin that face air velocity transducer is connected to an ADC chip and VIN-pin, between the VIN+ pin that pressure sensor is connected to the 2nd ADC0804 chip and VIN-pin, P2.1 pin and the P2.2 pin of second singlechip are connected the CS pin of an ADC0804 chip and the 2nd ADC0804 chip respectively.
6. CIT as claimed in claim 5 has the vent cabinet small controller of variable air rate regulatory function, it is characterized in that, ultrasonic wave module adopts HC-SR04 chip, and its ECHO pin connects the INT0 pin of second singlechip, and the TRTG pin of ultrasonic wave module connects the P2.0 pin of second singlechip.
7. CIT as claimed in claim 6 has the vent cabinet small controller of variable air rate regulatory function, it is characterized in that, DAC D/A converting circuit is realized by max515 chip, its REFIN pin connects direct current and by the 5th resistance (R5) ground connection by the 4th resistance (R4), its SCLK pin, CS pin and DIN pin are connected the P2.3 pin of second singlechip, P2.4 pin and P2.5 pin respectively, and its OUT pin connects host computer.
8. CIT as claimed in claim 1 has the vent cabinet small controller of variable air rate regulatory function, it is characterized in that, power-switching circuit mainly comprises transformer (T1), the first diode (D1), the second diode (D2), the 3rd diode (D3) and the 4th diode (D4), the first Voltage stabilizing module (U1), the second Voltage stabilizing module (U2) and the 3rd Voltage stabilizing module (U3); First diode (D1), the second diode (D2), the 3rd diode (D3) and the 4th diode (D4) are connected into loop successively, two outputs of transformer (T1) secondary coil are connected between the first diode (D1) and the second diode (D2) and between the 3rd diode (D3) and the 4th diode (D4), and transformer (T1) has earth terminal and its primary coil access 220V alternating current; The input of the first Voltage stabilizing module (U1) is connected between the second diode (D2) and the 4th diode (D4), and respectively by the first electric capacity (C1) and the 3rd electric capacity (C3) ground connection, its output connects the first DC output end by the 6th resistance (R6), and respectively by the 5th electric capacity (C5) and the 7th electric capacity (C7) ground connection; The input of the second Voltage stabilizing module (U2) is connected between the first diode (D1) and the 3rd diode (D3), and respectively by the second electric capacity (C2) and the 4th electric capacity (C4) ground connection, its output connects the second DC output end by the 7th resistance (R7), and respectively by the 6th electric capacity (C6) and the 8th electric capacity (C8) ground connection; 3rd Voltage stabilizing module (U3) input connects the first Voltage stabilizing module (U1) output, and by the 9th electric capacity (C9) ground connection, its output as the 3rd DC output end, and passes through the tenth electric capacity (C10) ground connection.
9. CIT as claimed in claim 1 has the vent cabinet small controller of variable air rate regulatory function, it is characterized in that, the model of the first Voltage stabilizing module (U1) and the second Voltage stabilizing module (U2) is the model of the 7815, three Voltage stabilizing module (U3) is 7805.
10. the CIT as described in any one of claim 1 to 9 has the vent cabinet small controller of variable air rate regulatory function, it is characterized in that, alarm module is buzzer.
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| CN201410734122.3A CN104596053B (en) | 2014-12-05 | 2014-12-05 | CIT has the vent cabinet small controller of variable air rate regulatory function |
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| CN201410734122.3A CN104596053B (en) | 2014-12-05 | 2014-12-05 | CIT has the vent cabinet small controller of variable air rate regulatory function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017099569A1 (en) * | 2015-12-11 | 2017-06-15 | Castro Baldenebro Brayan Gamaniel | Automated device for regulating air flows and brightness of lights in the home |
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| CN102435437A (en) * | 2011-09-08 | 2012-05-02 | 天津理工大学 | Chaos real-time detection system for wind power system and working method thereof |
| CN203541053U (en) * | 2013-09-17 | 2014-04-16 | 安徽华盛科技控股股份有限公司 | CIT energy-saving control system for fume cupboards |
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| WO2017099569A1 (en) * | 2015-12-11 | 2017-06-15 | Castro Baldenebro Brayan Gamaniel | Automated device for regulating air flows and brightness of lights in the home |
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| CN104596053B (en) | 2017-09-15 |
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