CN205638992U - Scavenger fan intelligence control system based on signal filtering and amplification circuit - Google Patents

Scavenger fan intelligence control system based on signal filtering and amplification circuit Download PDF

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Publication number
CN205638992U
CN205638992U CN201620252619.6U CN201620252619U CN205638992U CN 205638992 U CN205638992 U CN 205638992U CN 201620252619 U CN201620252619 U CN 201620252619U CN 205638992 U CN205638992 U CN 205638992U
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pole
resistance
circuit
signal
amplifier
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CN201620252619.6U
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李考
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Chengdu Botai Technology Co Ltd
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Chengdu Botai Technology Co Ltd
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Abstract

The utility model discloses a scavenger fan intelligence control system based on signal filtering and amplification circuit, including the singlechip, the scavenger fan that all is connected with the singlechip, data memory, power, signal analog to digital conversion circuit and signal filtering and amplification circuit, the gas sensor who is connected with signal analog to digital conversion circuit to and the infrared ray sensor who is connected with signal filtering and amplification circuit, signal analog to digital conversion circuit includes the regulator circuit that signaling conversion circuit that the input is connected and input and signaling conversion circuit's output is connected with gas sensor, the output of regulator circuit is connected with the singlechip. The utility model discloses a carry out analysis processes through the information of singlechip in to the scavenger fan application range of gas sensor and infrared ray sensor monitoring, realized that the control scavenger fan carries out the automation and opens and cut out, simultaneously, the effectual electric power resource of having practiced thrift.

Description

A kind of ventilation fan intelligence control system based on signal filtering amplifying circuit
Technical field
The utility model relates to electronic applications, specifically, be a kind of based on signal filtering amplifying circuit Ventilation fan intelligence control system.
Background technology
The whole world is all constantly increasing because of the number that carbon monoxide poisoning is dead every year, and atmosphere draught-free is then Cause the key factor of carbon monoxide poisoning.People cause carbon monoxide poisoning to prevent atmosphere draught-free The generation of event, is just mounted with ventilation fan in the place such as narrow spaces such as toilet, corridor, kitchens, uses To guarantee that indoor and extraneous air is circulated, reduce indoor CO (carbon monoxide converter) gas.But, existing The many employings of ventilation fan are manually turned on and off, and often forget to turn on ventilation fan due to people, cause one The frequent generation of carbon monoxide poisoning event.And people can forget to close ventilation fan after opening ventilation fan sometimes, Thus cause the waste of electric power resource.
Therefore it provides the control system of a kind of open and close that can automatically control ventilation fan, become for this The task of top priority of those skilled in the art.
Utility model content
The purpose of this utility model is overcome ventilation fan of the prior art not automatically turn on and close Defect, it is provided that a kind of based on signal filtering amplifying circuit ventilation fan intelligence control system.
This utility model is achieved through the following technical solutions: a kind of ventilation based on signal filtering amplifying circuit Fan intelligence control system, including single-chip microcomputer, the ventilation fan being all connected with single-chip microcomputer, data storage, electricity Source, signal analog to digital conversion circuit and signal filtering amplifying circuit, the gas being connected with signal analog to digital conversion circuit Dependent sensor, and the infrared ray sensor being connected with signal filtering amplifying circuit;Described signal modulus turns Change the signaling conversion circuit that circuit includes that input is connected with gas sensor, and input is changed with signal The adjustment circuit that the outfan of circuit is connected;The outfan of described adjustment circuit is connected with single-chip microcomputer.
Described signaling conversion circuit is by conversion chip U, and negative pole is as the input of signaling conversion circuit, positive pole Polar capacitor C6, the P pole being connected with the IN pin of conversion chip U after resistance R14 and conversion chip Diode D6, the N pole warp that the CLK pin of U is connected, N pole is connected with the positive pole of polar capacitor C6 After resistance R13 the CLK pin with conversion chip U be connected, P pole after resistance R12 with diode D6 The diode D5 that is connected of N pole, and positive pole is connected with the N pole of diode D5, negative pole is through resistance The polar capacitor C7 composition being connected with the OPIN pin of conversion chip U after R16;Described conversion chip U GND pin ground connection, its AL pin and SW pin and OUT pin and the common shape of COMP pin Become the outfan of signal conversion electricity.
Described adjust electricity routing amplifier P3, audion VT2, P pole after resistance R20 with audion VT2 The diode that emitter stage is connected, N pole is connected with the AL pin of conversion chip U after resistance R15 D7, positive pole P pole with diode D7 after resistance R21 is connected, the outfan of negative pole and amplifier P3 The polar capacitor C9 being connected, negative pole is connected with the base stage of audion VT2, positive pole and conversion chip U The polar capacitor C8 that is connected of SW pin, one end is connected with the colelctor electrode of audion VT2, the other end The adjustable resistance R19 being connected with the OUT pin of conversion chip U, and P pole after resistance R17 with turn The COMP pin changing chip U is connected, N pole negative pole with amplifier P3 after resistance R18 is connected Diode D8 composition;The positive pole of described amplifier P3 is connected with the colelctor electrode of audion VT2, and it is put The outfan of big device P3 is as the outfan adjusting circuit.
Described signal filtering amplifying circuit includes at the signal filtering that input is connected with infrared ray sensor Reason circuit, processes, with signal filtering, the signal amplification output circuit that the outfan of circuit is connected with input; The outfan of described signal amplification output circuit is connected with single-chip microcomputer.
Described signal filtering processes electricity routing amplifier P1, audion VT1, and negative pole processes as signal filtering Polar capacitor C1, P pole that the input of circuit, positive pole are connected with the positive pole of amplifier P1 and amplifier Two poles that the outfan of P1 is connected, N pole base stage with audion VT1 after adjustable resistance R5 is connected Pipe D2, negative pole base stage with audion VT1 after resistance R4 is connected, positive pole after resistance R3 with two Polar capacitor C2, the P pole that the N pole of pole pipe D2 is connected after resistance R1 with the positive pole phase of amplifier P1 Connect, diode D1 that N pole positive pole with polar capacitor C2 after resistance R2 is connected, and negative pole is suitable Secondary be connected through diode D3 colelctor electrode with audion VT1 after resistance R10, positive pole is sequentially through resistance The polar capacitor C3 composition being connected with the positive pole of amplifier P1 after R7 and resistance R6;Described amplifier P1 Minus earth;The emitter stage of described audion VT1 processes the outfan of circuit as signal filtering.
Described signal amplification output circuit by amplifier P2, negative pole after resistance R8 with audion VT1 send out The polar capacitor C4 that emitter-base bandgap grading is connected, positive pole is connected with the positive pole of amplifier P2, negative pole is through resistance R11 Outfan with amplifier P2 is connected afterwards, positive pole negative pole with polar capacitor C4 after resistance R9 is connected Polar capacitor C5, and P pole is connected with the positive pole of polar capacitor C5, N pole and amplifier P2 just The diode D4 composition that pole is connected;The minus earth of described amplifier P2, its outfan is put as signal The outfan of big output circuit.
For guaranteeing practical effect of the present utility model, described gas sensor is QM-N5 gas sensing Device;Described infrared ray sensor is TR350 infrared ray sensor;Described conversion chip U is MAX291 Integrated chip.
This utility model compared with prior art, has the following advantages and beneficial effect:
(1) ventilation fan range can be monitored by infrared ray sensor of the present utility model, and single-chip microcomputer can Control ventilation fan according to the information analysis result that infrared ray sensor is monitored to automatically turn on and close; Meanwhile, the result of the air monitering of ventilation fan range also can be controlled by single-chip microcomputer according to gas sensor Ventilation fan automatically turns on and cuts out.
(2) nothing in the signal of telecommunication that gas sensor can be transmitted by signal analog to digital conversion circuit of the present utility model Eliminate with signal, and the signal of telecommunication eliminating garbage signal can be converted to data signal, meanwhile, this letter Data signal after conversion can also be adjusted by number analog to digital conversion circuit, makes the frequency of this data signal strengthen, Ensure that the accuracy of the data signal that single-chip microcomputer receives, thus the control that improve this intelligence control system is accurate Really property.
(3) signal of telecommunication of infrared ray sensor output can be carried out by signal filtering amplifying circuit of the present utility model Filtering, effectively eliminates the interference signal in the signal of telecommunication, is put by the signal of telecommunication after this anti-interference process meanwhile It is transferred to single-chip microcomputer after great, ensures that the accuracy that this intelligence control system controls.
(4) gas sensor of the present utility model is QM-N5 gas sensor, this biography catalytic combustion type air-sensitive The stable performance of sensor, the accuracy of monitoring is high, ensures that the accuracy that this control system controls.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model.
Fig. 2 is the electrical block diagram of signal filtering amplifying circuit of the present utility model.
Fig. 3 is the electrical block diagram of signal analog to digital conversion circuit of the present utility model.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing thereof, this utility model is described in further detail, but this practicality is new The embodiment of type is not limited to this.
As it is shown in figure 1, this utility model includes single-chip microcomputer, the ventilation fan that is all connected with single-chip microcomputer, data Memorizer, power supply, signal analog to digital conversion circuit and signal filtering amplifying circuit, with signal analog to digital conversion circuit The gas sensor being connected, and the infrared ray sensor being connected with signal filtering amplifying circuit.Wherein, Described signal filtering amplifying circuit is as in figure 2 it is shown, it includes that signal filtering processes circuit and signal amplifies output Circuit.
For guaranteeing reliability service of the present utility model, described single-chip microcomputer preferentially have employed AT89C51 single-chip microcomputer. This AT89C51 single-chip microcomputer TXD pin is connected with ventilation fan, and TO pin is connected with data storage, VCC pin is connected with power supply.Described power supply is 12V DC voltage, and this 12V DC voltage is monolithic Machine is powered.
When this utility model runs, described infrared ray sensor the most preferentially uses stable performance, monitoring range Wide TR350 infrared ray sensor realizes.This infrared ray sensor is for the prison to ventilation fan range Survey, i.e. have nobody to be monitored ventilation fan range, and the information that will detect is converted to warp after the signal of telecommunication Signal filtering amplifying circuit transmits, the signal of telecommunication that infrared ray sensor is exported by this signal filtering amplifying circuit Being filtered, to eliminate the interference signal in this signal of telecommunication, the signal of telecommunication after simultaneously processing transmits after amplifying To single-chip microcomputer, single-chip microcomputer then leaves automatically according to the output control ventilation fan of the signal of telecommunication analysis to reception Open and close.Infrared ray sensor monitor ventilation fan range have people time, single-chip microcomputer receives this letter After breath, then output control electric current is to ventilation fan, and now, ventilation fan is started working, the sky of ventilation fan working range Gas forms convection current with outdoor air, has effectively eliminated the CO (carbon monoxide converter) gas pair in ventilation fan range The injury of people.When infrared ray Sensor monitoring to people leaves, single-chip microcomputer then can time delay after receiving this information Close ventilation fan, to prevent people when the short time enters repeatedly, cause ventilation fan ceaselessly to open and damage and change Gas is fanned.Data storage of the present utility model the most preferentially have employed the VNXe3200 data storage of stable performance Device, the internal memory of this data storage contains the air normal value containing carbon monoxide, and this air is containing carbon monoxide Normal value is the carbon monoxide value that people's eupnea does not constitute injury.
Meanwhile, when ventilation fan is unlocked, the air of ventilation fan range is then carried out by gas sensor in real time Monitoring, and the information of monitoring is converted to the signal of telecommunication through signal analog to digital conversion circuit export, this signal modulus turns Change circuit can be eliminated by the garbage signal in the signal of telecommunication of gas sensor transmission, and can be useless by eliminating The signal of telecommunication of signal is converted to data signal, and meanwhile, this signal analog to digital conversion circuit can also be by the number after conversion The number of it is believed that is adjusted, and makes the frequency of this data signal strengthen.After this signal analog to digital conversion circuit general strengthen Data signal transmission is to single-chip microcomputer, and single-chip microcomputer obtains the oxidation in air after then being analyzed and processed by this signal of telecommunication Carbon value, this carbon monoxide value is carried out containing carbon monoxide value by this single-chip microcomputer with the air of storage in data storage Comparison, and control ventilation fan by the result of comparison and automatically turn on, make the air in ventilation fan range Value keeps consistent with the carbon monoxide value that the air of storage in data storage contains.In ventilation fan range The carbon monoxide value that contains of air keep consistent with the carbon monoxide value that the air of storage in data storage contains After, single-chip microcomputer then stops then being closed to ventilation fan output electric current, i.e. ventilation fan.
Single-chip microcomputer of the present utility model uses by infrared ray sensor and gas sensor monitor ventilation fan The information of scope, it is achieved that control ventilation fan and automatically turn on and close, effectively saved electric power simultaneously Resource.
As in figure 2 it is shown, described signal filtering amplifying circuit includes that signal filtering processes circuit and signal amplifies defeated Go out circuit;Described signal filtering processes electricity routing amplifier P1, audion VT1, resistance R1, resistance R2, Resistance R3, resistance R4, adjustable resistance R5, resistance R6, resistance R7, resistance R10, polar capacitor C1, Polar capacitor C2, polar capacitor C3, diode D1, diode D2, and diode D3 form.
During connection, the negative pole of polar capacitor C1 processes the input of circuit, positive pole as signal filtering and puts The positive pole of big device P1 is connected.The P pole of diode D2 is connected with the outfan of amplifier P1, N pole warp After adjustable resistance R5, the base stage with audion VT1 is connected.The negative pole of polar capacitor C2 is after resistance R4 Be connected with the base stage of audion VT1, positive pole N pole with diode D2 after resistance R3 is connected.
Wherein, the P pole of diode D1 positive pole with amplifier P1 after resistance R1 be connected, N pole warp After resistance R2, the positive pole with polar capacitor C2 is connected.The negative pole of polar capacitor C3 is sequentially through diode D3 Be connected with colelctor electrode with audion VT1 after resistance R10, positive pole is sequentially through resistance R7 and resistance R6 Positive pole with amplifier P1 is connected afterwards.The minus earth of described amplifier P1;Described audion VT1's Emitter stage processes the outfan of circuit as signal filtering and is connected with signal amplification circuit.
Further, described signal amplification output circuit is by amplifier P2, resistance R8, resistance R9, resistance R11, polar capacitor C4, polar capacitor C5, and diode D4 form.
During connection, the negative pole of polar capacitor C4 emitter stage with audion VT1 after resistance R8 is connected, Positive pole is connected with the positive pole of amplifier P2.The negative pole of polar capacitor C5 after resistance R11 with amplifier P2 Outfan be connected, positive pole negative pole with polar capacitor C4 after resistance R9 is connected.Diode D4 P pole be connected with the positive pole of polar capacitor C5, N pole is connected with the positive pole of amplifier P2.Described put The minus earth of big device P2, its outfan is as the outfan of signal amplification output circuit and AT89C51 The RXD pin of single-chip microcomputer is connected.
During operation, the signal of telecommunication of infrared ray sensor output is through polar capacitor C1 and amplifier P1 and three poles The signal filtering that pipe VT1 and adjustable resistance R5 is formed processes circuit and is filtered, by the interference in the signal of telecommunication Signal eliminates, and is adjusted by the adjustable resistance R5 in signal filter circuit and audion VT1, The signal of telecommunication amplified device P2 and the signal of polar capacitor C4 and polar capacitor C5 formation after this process are put Big output circuit is transferred to single-chip microcomputer after being amplified, thus effectively ensure that the signal that single-chip microcomputer receives Accuracy.
As it is shown on figure 3, described signal analog to digital conversion circuit includes signaling conversion circuit and adjusts circuit;Described Signaling conversion circuit is by conversion chip U, resistance R12, resistance R13, resistance R14, resistance R16, polarity Electric capacity C6, polar capacitor C7, diode D5, and diode D6 form.
During connection, the negative pole of polar capacitor C6 as signaling conversion circuit input and and gas sensor Be connected, positive pole IN pin with conversion chip U after resistance R14 is connected.The P pole of diode D6 Be connected with the CLK pin of conversion chip U, N pole is connected with the positive pole of polar capacitor C6.Diode The N pole of D5 CLK pin with conversion chip U after resistance R13 is connected, P pole is after resistance R12 It is connected with the N pole of diode D6.
Wherein, the positive pole of polar capacitor C7 is connected with the N pole of diode D5, negative pole is through resistance R16 It is connected with the OPIN pin of conversion chip U afterwards.The GND pin ground connection of described conversion chip U, its AL pin and SW pin and OUT pin and COMP pin are collectively forming the outfan of signal conversion electricity And be connected with adjusting circuit.
Further, described adjustment electricity routing amplifier P3, audion VT2, resistance R15, resistance R17, Resistance R18, adjustable resistance R19, resistance R20, resistance R21, polar capacitor C8, polar capacitor C9, Diode D7, and diode D8 composition.
During connection, the P pole of diode D7 emitter stage with audion VT2 after resistance R20 is connected, N pole AL pin with conversion chip U after resistance R15 is connected.The positive pole of polar capacitor C9 is through resistance After R21, the P pole with diode D7 is connected, negative pole is connected with the outfan of amplifier P3.Polarity electricity The negative pole of appearance C8 is connected with the base stage of audion VT2, positive pole is connected with the SW pin of conversion chip U Connect.
Meanwhile, one end of adjustable resistance R19 be connected with the colelctor electrode of audion VT2, the other end with turn The OUT pin changing chip U is connected.The P pole of diode D8 after resistance R17 with conversion chip U COMP pin be connected, N pole negative pole with amplifier P3 after resistance R18 is connected.Described put The big positive pole of device P3 is connected with the colelctor electrode of audion VT2, and the outfan of its amplifier P3 is as adjustment The outfan of circuit is also connected with the WR pin of AT89C51 single-chip microcomputer.
During operation, the signal of telecommunication filtered polar capacitor C6 and diode D6 of gas sensor output and pole Property electric capacity C7 formed filter processor be filtered after, the garbage signal in this signal of telecommunication is eliminated, through filter The signal of telecommunication after ripple processor processes is transferred to conversion chip U, and this conversion chip U is then by chip Additional electrical components converts electrical signals to data signal.Data signal after its conversion is then by diode D7 Low by data signal of the adjustor formed with adjustable resistance R19 and polar capacitor C8 and diode D8 Frequently signal strengthens, and meanwhile, the signal of telecommunication after being processed by amplifier P3 is transferred to single-chip microcomputer after being amplified, Thus effectively ensure that the accuracy of the data signal that single-chip microcomputer receives.New in order to preferably implement this practicality Type, described conversion chip U the most preferentially have employed the integrated chip of MAX291 of stable performance and realizes.
According to above-described embodiment, can well realize this utility model.

Claims (9)

1. a ventilation fan intelligence control system based on signal filtering amplifying circuit, it is characterised in that bag Include single-chip microcomputer, the ventilation fan that is all connected, data storage, power supply, signal mode number conversion electricity with single-chip microcomputer Road and signal filtering amplifying circuit, the gas sensor being connected with signal analog to digital conversion circuit, and with letter Number infrared ray sensor that filter amplification circuit is connected;Described signal analog to digital conversion circuit include input with The signaling conversion circuit that gas sensor is connected, is connected with the outfan of signaling conversion circuit with input Adjustment circuit;The outfan of described adjustment circuit is connected with single-chip microcomputer.
A kind of ventilation fan Based Intelligent Control based on signal filtering amplifying circuit the most according to claim 1 System, it is characterised in that described signaling conversion circuit is by conversion chip U, and negative pole is as signaling conversion circuit Input, positive pole the polar capacitor C6, P that are connected with the IN pin of conversion chip U after resistance R14 Two poles that pole is connected with the CLK pin of conversion chip U, N pole is connected with the positive pole of polar capacitor C6 Pipe D6, N pole CLK pin with conversion chip U after resistance R13 is connected, P pole is through resistance R12 The diode D5 being connected with the N pole of diode D6 afterwards, and positive pole is extremely connected with the N of diode D5 Connect, polar capacitor C7 that negative pole is connected with the OPIN pin of conversion chip U after resistance R16 composition; The GND pin ground connection of described conversion chip U, its AL pin and SW pin and OUT pin and COMP pin is collectively forming the outfan of signal conversion electricity.
A kind of ventilation fan Based Intelligent Control based on signal filtering amplifying circuit the most according to claim 2 System, it is characterised in that described adjustment electricity routing amplifier P3, audion VT2, P pole is through resistance R20 Afterwards the emitter stage with audion VT2 be connected, N pole after resistance R15 with the AL pin of conversion chip U The diode D7 being connected, positive pole P pole with diode D7 after resistance R21 is connected, negative pole with put The polar capacitor C9 that the outfan of big device P3 is connected, negative pole is connected with the base stage of audion VT2, just The current collection of the polar capacitor C8 that pole is connected with the SW pin of conversion chip U, one end and audion VT2 The adjustable resistance R19 that pole is connected, the other end is connected with the OUT pin of conversion chip U, and P pole After resistance R17 the COMP pin with conversion chip U be connected, N pole after resistance R18 with amplifier The diode D8 composition that the negative pole of P3 is connected;The positive pole of described amplifier P3 and the current collection of audion VT2 Pole is connected, and the outfan of its amplifier P3 is as the outfan adjusting circuit.
A kind of ventilation fan Based Intelligent Control based on signal filtering amplifying circuit the most according to claim 3 System, it is characterised in that described signal filtering amplifying circuit includes that input is connected with infrared ray sensor Signal filtering process circuit, the signal being connected with the outfan of input and signal filtering process circuit is put Big output circuit;The outfan of described signal amplification output circuit is connected with single-chip microcomputer.
A kind of ventilation fan Based Intelligent Control based on signal filtering amplifying circuit the most according to claim 4 System, it is characterised in that described signal filtering processes electricity routing amplifier P1, audion VT1, and negative pole is made The polar capacitor C1 being connected with the positive pole of amplifier P1 for the signal filtering process input of circuit, positive pole, P pole is connected with the outfan of amplifier P1, N pole after adjustable resistance R5 with the base stage of audion VT1 The diode D2 being connected, negative pole base stage with audion VT1 after resistance R4 is connected, positive pole is through electricity After resistance R3 polar capacitor C2, the P pole that is connected with the N pole of diode D2 after resistance R1 with amplifier The diode D1 that the positive pole of P1 is connected, N pole positive pole with polar capacitor C2 after resistance R2 is connected, And negative pole is sequentially connected through diode D3 colelctor electrode with audion VT1 after resistance R10, positive pole The polar capacitor C3 composition being sequentially connected through resistance R7 positive pole with amplifier P1 after resistance R6;Institute State the minus earth of amplifier P1;The emitter stage of described audion VT1 processes the defeated of circuit as signal filtering Go out end.
A kind of ventilation fan Based Intelligent Control based on signal filtering amplifying circuit the most according to claim 5 System, it is characterised in that described signal amplification output circuit by amplifier P2, negative pole after resistance R8 with The polar capacitor C4 that the emitter stage of audion VT1 is connected, positive pole is connected with the positive pole of amplifier P2, Negative pole outfan with amplifier P2 after resistance R11 is connected, positive pole after resistance R9 with polar capacitor The polar capacitor C5 that the negative pole of C4 is connected, and P pole is connected with the positive pole of polar capacitor C5, N pole The diode D4 composition being connected with the positive pole of amplifier P2;The minus earth of described amplifier P2, it is defeated Go out the end outfan as signal amplification output circuit.
A kind of ventilation fan Based Intelligent Control based on signal filtering amplifying circuit the most according to claim 6 System, it is characterised in that described gas sensor is QM-N5 gas sensor.
A kind of ventilation fan Based Intelligent Control based on signal filtering amplifying circuit the most according to claim 7 System, it is characterised in that described infrared ray sensor is TR350 infrared ray sensor.
A kind of ventilation fan Based Intelligent Control based on signal filtering amplifying circuit the most according to claim 8 System, it is characterised in that described conversion chip U is the integrated chip of MAX291.
CN201620252619.6U 2016-03-29 2016-03-29 Scavenger fan intelligence control system based on signal filtering and amplification circuit Expired - Fee Related CN205638992U (en)

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Application Number Priority Date Filing Date Title
CN201620252619.6U CN205638992U (en) 2016-03-29 2016-03-29 Scavenger fan intelligence control system based on signal filtering and amplification circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620252619.6U CN205638992U (en) 2016-03-29 2016-03-29 Scavenger fan intelligence control system based on signal filtering and amplification circuit

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CN205638992U true CN205638992U (en) 2016-10-12

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