CN105606834A - Oscillation alarm type traceable alcometer based on low-pass filter circuit - Google Patents
Oscillation alarm type traceable alcometer based on low-pass filter circuit Download PDFInfo
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- CN105606834A CN105606834A CN201510964992.4A CN201510964992A CN105606834A CN 105606834 A CN105606834 A CN 105606834A CN 201510964992 A CN201510964992 A CN 201510964992A CN 105606834 A CN105606834 A CN 105606834A
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Abstract
The invention discloses an oscillation alarm type traceable alcometer based on a low-pass filter circuit. The oscillation alarm type traceable alcometer mainly comprises a central processing unit, as well as a displayer, a GPS (global positioning system) positioning module, a storage, a wireless sensing circuit, a drive oscillation circuit and a switching circuit, which are connected with the central processing unit respectively, and further comprises an alarm connected with the drive oscillation circuit, and the like. The oscillation alarm type traceable alcometer is arranged in an automobile cab and used for detecting the alcohol content of a driver, if the driver drives drunkly, the alcometer geographically positions a drunkly driven automobile in real time by the GPS positioning module and sends the geographic position of the drunkly driven automobile to a traffic command and monitoring center by a wireless transmission circuit, so that traffic control personnel conveniently trace and process the drunkly driven automobile, and the traffic offence of drunk driving is further fundamentally eradicated. The oscillation alarm type traceable alcometer is provided with the low-pass filter circuit, thereby being capable of performing filtering processing on voltage signals and preventing interference signals from affecting the detection precision of the alcometer.
Description
Technical field
The present invention relates to a kind of detector, specifically refer to that a kind of vibration alarm type based on low-pass filter circuit canFollow the trail of alcohol content tester.
Background technology
In recent years, China's automobile pollution is in continuous increase, meanwhile, and by the caused people that drives when intoxicatedThe traffic accident incidence of member's injures and deaths and property loss is also constantly soaring. In order to stop the generation of this existing picture,Domestic some conventional methods of common use detect drunk driving behavior, with the test of hand-held expiration alcohol andThe inspection of headspace gas chromatography instrument blood alcohol. But two kinds of above-mentioned methods can only be established card by traffic monitoring personnelImplement, detect and bring very large inconvenience to drunk driving, can not fundamentally stop the act of violating regulations of driving when intoxicated.
Summary of the invention
The object of the invention is to overcome traditional drunk driving detection method and detect and bring very large inconvenience to drunk driving,Can not fundamentally stop the act of violating regulations defect of driving when intoxicated, provide a kind of based on low-pass filter circuitThe traceable alcohol content tester of vibration alarm type.
Object of the present invention is achieved through the following technical solutions: a kind of vibration based on low-pass filter circuit is reported to the policeThe traceable alcohol content tester of formula, mainly by central processing unit, the display that is connected with central processing unit respectively,GPS locating module, holder, wireless sensing circuit, driving oscillating circuit and change-over circuit, shake with drivingSwing the alarm that circuit is connected, and the alcohol sensor being connected with change-over circuit composition; For betterEnforcement the present invention, the present invention is also serially connected with low-pass filter circuit between change-over circuit and central processing unit.
Further, described low-pass filter circuit is by amplifier P1, amplifier P2, one end and amplifier P1The resistance R 12 of the input that positive pole is connected, negative pole forms this low-pass filter circuit, be serially connected in amplifierResistance R 13 between positive pole and the output of P1, anodal be connected with the positive pole of amplifier P1, negative pole withThe capacitor C 12 that the output of amplifier P1 is connected, negative pole is connected with the output of amplifier P1, justThe capacitor C 13 of utmost point ground connection, with the resistance R 14 that capacitor C 13 is in parallel, is serially connected in the output of amplifier P1And resistance R 15 between the positive pole of amplifier P2, be anodally connected with the output of amplifier P1, negative poleThe capacitor C 14 being connected with the output of amplifier P2 after resistance R 16, negative pole and amplifier P2'sOutput is connected, the capacitor C of plus earth 15, the resistance R 17 being in parallel with capacitor C 15, and PThe diode D10 that the utmost point is connected with the negative pole of amplifier P2, the N utmost point is connected with the positive pole of capacitor C 15Composition; The minus earth of described amplifier P1; The output of described amplifier P2 forms this LPFThe output of circuit; The input of described low-pass filter circuit is connected with the output of change-over circuit, and it is defeatedGoing out end is connected with central processing unit.
Described driving oscillating circuit is by the chip U1 that vibrates, and drives chip U2, triode VT6, negative pole with shakeThe DIS pin that swings chip U1 is connected, the anodal electricity being connected with the THRE pin of vibration chip U1Hold C8, the N utmost point is connected with the VCC pin of vibration chip U1 after resistance R 8, the P utmost point is through resistance R 9The diode D8 of ground connection when being connected with the GND pin of vibration chip U1 afterwards, negative pole and vibration chipThe CONT pin of U1 is connected, the anodal capacitor C 9 being connected with the P utmost point of diode D8, is serially connected inVibration chip U1 and OUT pin and drive the resistance R 10 between the DIS pin of chip U2, the N utmost point withDrive the CONT pin of chip U2 to be connected, the P utmost point after resistance R 11 with the TRI of vibration chip U1The diode D9 that pin is connected, anodal is connected with the OUT pin of driving chip U2, negative pole is with threeThe capacitor C 10 that the base stage of utmost point pipe VT6 is connected, and negative pole is connected with the colelctor electrode of triode VT6,Capacitor C 11 anodal ground connection forms; The VCC pin of described vibration chip U1 and the positive pole of capacitor C 8When being connected, connect 12V voltage, its RE pin is connected with VCC pin, its THRE pin withThe N utmost point of diode D8 forms input and the central processing unit of this driving oscillating circuit when being connectedBe connected; The VCC pin of described driving chip U2 and RE pin all with the RE pin of vibration chip U1Be connected, its GND pin is connected with the negative pole of capacitor C 11, its TRI pin and triode VT6Colelctor electrode be connected, the emitter stage of described triode VT6 and its colelctor electrode form this driving vibration jointlyThe output of circuit is also connected with alarm.
Described change-over circuit is by non-linear compensation circuit, the analog-to-digital conversion electricity being connected with non-linear compensation circuitRoad, and the mu balanced circuit being connected with analog to digital conversion circuit composition; The input of described non-linear compensation circuitEnd is connected with alcohol sensor, and the output of mu balanced circuit is connected with the input of low-pass filter circuit.
Described non-linear compensation circuit is by triode VT1, triode VT2, and triode VT3, the N utmost point is through electricityResistance is connected with the base stage of triode VT1 after R1, the P utmost point after capacitor C 1 with the base stage of triode VT2The diode D1 being connected, negative pole is connected with the colelctor electrode of triode VT3, positive pole is after resistance R 2The capacitor C 2 being connected with the emitter stage of triode VT1, anodal after resistance R 3 with the sending out of triode VT3The capacitor C 3 that emitter-base bandgap grading is connected, negative pole is connected with the colelctor electrode of triode VT2, the P utmost point and triodeThe diode D2 that the colelctor electrode of VT1 is connected, the N utmost point is connected with analog to digital conversion circuit, and the P utmost point withThe diode D3 that the N utmost point is connected, the N utmost point is connected with the analog to digital conversion circuit composition of diode D2; InstituteThe base stage of stating triode VT3 is connected with the base stage of triode VT2, its colelctor electrode with analog to digital conversion circuitBe connected, its emitter stage is connected with the emitter stage of triode VT2; The colelctor electrode of described triode VT2Be connected with analog to digital conversion circuit; The N utmost point of described diode D1 forms the defeated of this non-linear compensation circuitEnter end.
Analog-digital conversion circuit as described is by conversion chip U, FET MOS, the collection of anodal and triode VT3The capacitor C 4 that electrode is connected, negative pole is connected with the drain electrode of FET MOS, negative pole is through inductance L 1Be connected with the source electrode of FET MOS afterwards, the capacitor C 5 of plus earth, and the N utmost point and conversion chipThe diode D4 composition that the DIN pin of U is connected, the P utmost point is connected with the positive pole of capacitor C 4; DescribedThe VDD pin of conversion chip U is connected with the positive pole of capacitor C 4, its CS pin with diode D3The N utmost point be connected, its GND pin is simultaneously and the source electrode of FET MOS and the collection of triode VT2Electrode is connected, and its OUTA pin is all connected with mu balanced circuit with REF pin; Described capacitor C 5Negative pole is also connected with the N utmost point of diode D2.
Described mu balanced circuit is by triode VT4, triode VT5, unidirectional thyristor D5, the P utmost point and triodeVoltage stabilizing two utmost points of the output that the emitter stage of VT5 is connected, the N utmost point forms this mu balanced circuit after resistance R 7Pipe D7, positive pole is connected with the N utmost point of Zener diode D7, bears through potentiometer R4 in turn after resistance R 5The capacitor C 7 that the utmost point is connected with the base stage of triode VT5 after Zener diode D6, is serially connected in triodeResistance R 6 between the OUTA pin of the base stage of VT5 and conversion chip U, and anodal and triode VT4Base stage be connected, negative pole forms with the capacitor C 6 that the OUTA pin of conversion chip U is connected; InstituteThe control end of stating unidirectional thyristor D5 is connected with the control end of potentiometer R4, its N utmost point with capacitor C 7Positive pole be connected, its P utmost point is connected with the emitter stage of triode VT4; The base of described triode VT4The utmost point is connected with the REF pin of conversion chip U, its grounded collector; The colelctor electrode of described triode VT5Ground connection.
Described conversion chip U is MAX522 integrated chip, described vibration chip U1 and driving chip U2Be NE555 integrated chip.
The present invention compares compared with prior art, has the following advantages and beneficial effect:
(1) to be arranged on car steering indoor in the present invention, detects the alcohol content of human pilot, as drive artificialThe geographical position of drunk driving vehicle is located in drunk driving in real time by GPS locating module, and passes through wireless transmission circuitThe geographical position of driving of filling a wine cup for sends to point duty Surveillance center, so that traffic monitoring personnel are to drunk drivingVehicle is followed the trail of, is processed, and fundamentally stops the act of violating regulations of driving when intoxicated.
(2) the present invention adopts and drives oscillating circuit to drive alarm, makes alarm passing in timeAlert frequency is more and more rapid by accelerating slowly, and when human pilot, this kind of chimes of doom can be better when driving when intoxicatedPrompting human pilot.
(3) the present invention is provided with low-pass filter circuit, and it can carry out filtering processing to voltage signal, avoidsInterfering signal affects accuracy of detection of the present invention.
Brief description of the drawings
Fig. 1 is overall structure schematic diagram of the present invention.
Fig. 2 is the structural representation of change-over circuit of the present invention.
Fig. 3 is the structural representation of driving oscillating circuit of the present invention.
Fig. 4 is the structural representation of low-pass filter circuit of the present invention.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are notBe limited to this.
Embodiment
As shown in Figure 1, the traceable alcohol inspection of a kind of vibration alarm type based on low-pass filter circuit of the present inventionSurvey instrument, mainly by central processing unit, the display that is connected with central processing unit respectively, GPS locating module,Holder, wireless sensing circuit, driving oscillating circuit and low-pass filter circuit, be connected with low-pass filter circuitThe change-over circuit connecing, with the alarm that drives oscillating circuit to be connected, and the wine being connected with change-over circuitEssence sensor composition.
The MQ303B type alcohol sensing that this alcohol sensor adopts dredging collateral Science and Technology Ltd. of Shenzhen to produceDevice, it is for detection of the alcohol content of human pilot, and transmission and the corresponding strength signal of alcohol concentration are to turningChange circuit. This change-over circuit is processed for the signal that alcohol sensor is sent, and its structure is as Fig. 2 instituteShow by by non-linear compensation circuit the analog to digital conversion circuit being connected with non-linear compensation circuit, and and mouldThe mu balanced circuit composition that number conversion circuit is connected.
Described non-linear compensation circuit is by triode VT1, triode VT2, and triode VT3, resistance R 1,Resistance R 2, resistance R 3, diode D1, diode D2, diode D3, capacitor C 1, capacitor C 2 withAnd capacitor C 3 forms.
When connection, the N utmost point of diode D1 is connected with the base stage of triode VT1 after resistance R 1, its PThe utmost point is connected with the positive pole of capacitor C 1. The negative pole of described capacitor C 1 is connected with the base stage of triode VT2Connect. The negative pole of capacitor C 2 is connected with the colelctor electrode of triode VT3, its positive pole after resistance R 2 with threeThe emitter stage of utmost point pipe VT1 is connected. The positive pole of capacitor C 3 after resistance R 3 with the transmitting of triode VT3The utmost point is connected, its negative pole is connected with the colelctor electrode of triode VT2. The P utmost point of diode D2 and three utmost pointsThe colelctor electrode of pipe VT1 is connected, its N utmost point is connected with analog to digital conversion circuit. The P utmost point of diode D3Be connected with the N utmost point of diode D2, its N utmost point is connected with analog to digital conversion circuit. Described triode VT3Base stage be connected with the base stage of triode VT2, its colelctor electrode is connected with analog to digital conversion circuit, itsEmitter-base bandgap grading is connected with the emitter stage of triode VT2. The colelctor electrode of described triode VT2 and analog-to-digital conversion electricityRoad is connected. The N utmost point of described diode D1 forms input and the alcohol of this non-linear compensation circuitSensor is connected. The signal of input can transmit by Inhibitory signal after this non-linear compensation circuit is processedDecay in journey, thus make the fidelity of signal higher.
This analog to digital conversion circuit is by conversion chip U, FET MOS, capacitor C 4, capacitor C 5, inductanceL1 and diode D4 composition. Wherein, the positive pole of capacitor C 4 be connected with the colelctor electrode of triode VT3,Its negative pole is connected with the drain electrode of FET MOS. The negative pole of capacitor C 5 is imitated with field after inductance L 1The source electrode that should manage MOS is connected, its plus earth. The N utmost point of diode D4 and the DIN of conversion chip UPin is connected, its P utmost point is connected with the positive pole of capacitor C 4.
Meanwhile, the VDD pin of described conversion chip U is connected with the positive pole of capacitor C 4, its CS pinBe connected with the N utmost point of diode D3, its GND pin simultaneously with the source electrode of FET MOS andThe colelctor electrode of triode VT2 is connected, and its OUTA pin is all connected with mu balanced circuit with REF pin.The negative pole of described capacitor C 5 is also connected with the N utmost point of diode D2.
The signal of this non-linear compensation circuit output is converted to voltage signal so that centre through analog to digital conversion circuitThe identification of reason device and processing. In order to improve conversion efficiency, described conversion chip U preferably adopts MAX522 integratedChip is realized.
Described mu balanced circuit is by triode VT4, triode VT5, and unidirectional thyristor D5, potentiometer R4,Resistance R 5, resistance R 6, resistance R 7, Zener diode D6, Zener diode D7, capacitor C 6 and electricityHold C7 composition.
When connection, the P utmost point of Zener diode D7 is connected with the emitter stage of triode VT5, its N utmost pointAfter resistance R 7, form the output of this mu balanced circuit and be connected with the input of low-pass filter circuit. Electric capacityThe positive pole of C7 in turn through potentiometer R4 be connected with the N utmost point of Zener diode D7 after resistance R 5, it is negativeThe utmost point is connected with the N utmost point of Zener diode D6. The P utmost point of described Zener diode D6 with triodeThe base stage of VT5 is connected. Resistance R 6 is serially connected in the base stage of triode VT5 and the OUTA of conversion chip UBetween pin. The positive pole of capacitor C 6 is connected with the base stage of triode VT4, its negative pole with conversion chip UOUTA pin be connected.
The control end of described unidirectional thyristor D5 is connected with the control end of potentiometer R4, its N utmost point with electricityThe positive pole that holds C7 is connected, and its P utmost point is connected with the emitter stage of triode VT4. Described triode VT4Base stage be connected with the REF pin of conversion chip U, its grounded collector. The collection of described triode VT5Electrode grounding. Voltage signal through analog to digital conversion circuit output carries out voltage stabilizing processing by mu balanced circuit, thereby keeps awayExempt from voltage pulsation and affect accuracy of detection of the present invention.
This low-pass filter circuit, for voltage signal is carried out to filtering processing, avoids interference effect of signals the present inventionAccuracy of detection, as shown in Figure 4, it is by amplifier P1, amplifier P2, one end and amplifier P1 are justThe resistance R 12 of the input that the utmost point is connected, negative pole forms this low-pass filter circuit, is serially connected in amplifier P1Positive pole and output between resistance R 13, anodal be connected with the positive pole of amplifier P1, negative pole with putThe capacitor C 12 that the output of large device P1 is connected, negative pole is connected with the output of amplifier P1, positive poleThe capacitor C 13 of ground connection, with the resistance R 14 that capacitor C 13 is in parallel, be serially connected in amplifier P1 output andResistance R 15 between the positive pole of amplifier P2, anodal be connected with the output of amplifier P1, negative poleThe capacitor C 14 being connected with the output of amplifier P2 after resistance R 16, negative pole and amplifier P2's is defeatedGo out that end is connected, the capacitor C 15 of plus earth, the resistance R 17 being in parallel with capacitor C 15, and the P utmost pointThe diode D10 composition be connected with the negative pole of amplifier P2, the N utmost point being connected with the positive pole of capacitor C 15.
The minus earth of this amplifier P1; The output of described amplifier P2 forms this low-pass filter circuitOutput. The input of described low-pass filter circuit is connected with the output of change-over circuit, its outputBe connected with central processing unit. From the voltage signal of change-over circuit output by this low-pass filter circuit to voltageInterfering signal in signal is filtered, and avoids interference effect of signals accuracy of detection of the present invention.
In addition, central processing unit is control centre of the present invention, and it preferentially adopts TA89C2051 type monolithicMachine is realized. The XTAL1 pin of this TA89C2051 type single-chip microcomputer connects the output of low-pass filter circuit,Its P3.2 pin connects the input that drives oscillating circuit, and its P3.3 pin connects wireless transmission circuit, P3.4 pipePin connects holder, and its P3.5 pin connects GPS locating module. This GPS locating module is used for locating drunk drivingThe geographical position of vehicle, the C3-370C type GPS locating module that it preferentially adopts JCOM company of Korea S to produce,The EN pin of this C3-370C type GPS locating module and the P3.5 pin phase of TA89C2051 type single-chip microcomputerConnect.
This central processing unit is also connected with automobile power source, and in the time that automotive test starts, this central processing unit is notWork, can provide working power to central processing unit when automobile starting, and central processing unit is started working, thisPart is not here done too much and is repeated for prior art.
Display is for showing the alcohol concentration value of human pilot, and holder is for storing the wine of human pilotEssence concentration value, the geographical position that wireless transmission circuit is driven for filling a wine cup for sends to point duty monitoringThe heart, this wireless transmission circuit adopts prior art to realize, and this driving oscillating circuit is for driving warningDevice sounds the alarm in the time of human pilot drunk driving.
As shown in Figure 3, this driving oscillating circuit, by the chip U1 that vibrates, drives chip U2, triode VT6,Resistance R 8, resistance R 9, resistance R 10, resistance R 11, capacitor C 8, capacitor C 9, capacitor C 10, electric capacityC11, diode D8 and diode D9 composition.
When connection, the negative pole of capacitor C 8 is connected with the DIS pin of vibration chip U1, its positive pole with shakeThe THRE pin that swings chip U1 is connected. The N utmost point of diode D8 after resistance R 8 with vibration chip U1VCC pin be connected, its P utmost point is connected with the GND pin of vibration chip U1 after resistance R 9Time ground connection. The negative pole of capacitor C 9 is connected with the CONT pin of vibration chip U1, its positive pole withThe P utmost point of diode D8 is connected. Resistance R 10 is serially connected in vibration chip U1 and OUT pin and drives coreBetween the DIS pin of sheet U2. The N utmost point of diode D9 is connected with the CONT pin that drives chip U2,Its P utmost point is connected with the TRI pin of vibration chip U1 after resistance R 11. The positive pole of capacitor C 10 withThe OUT pin of driving chip U2 is connected, its negative pole is connected with the base stage of triode VT6. Electric capacityThe negative pole of C11 is connected with the colelctor electrode of triode VT6, ground connection of its positive pole.
Meanwhile, when the VCC pin of described vibration chip U1 is connected with the positive pole of capacitor C 8, meet 12VVoltage, its RE pin is connected with VCC pin, the N utmost point phase of its THRE pin and diode D8When connection, form the input of this driving oscillating circuit and be connected with central processing unit. Described driving coreThe VCC pin of sheet U2 is all connected with the RE pin of vibration chip U1 with RE pin, its GND pipePin is connected with the negative pole of capacitor C 11, and its TRI pin is connected with the colelctor electrode of triode VT6, instituteState the emitter stage of triode VT6 and its colelctor electrode jointly form the output of this driving oscillating circuit and with reportAlert device is connected.
Wherein, vibration chip U1, capacitor C 9 and resistance R 9 form monostable multi-resonant oscillating circuit, drive coreSheet U2, capacitor C 10 and triode VT6 form drive circuit. When central processing unit send signal toWhile driving oscillating circuit, this monostable multi-resonant oscillating circuit starts starting of oscillation and sends oscillator signal to drive circuit,It is more and more faster that this monostable multi-resonant oscillating circuit is passed sent oscillation signal frequency in time, therefore alarmThe alarm song sending is more and more rapid by accelerating slowly, so can better remind human pilot. ForReach better implementation result, described vibration chip U1 and driving chip U2 are all preferably the integrated core of NE555Sheet is realized.
When work, when human pilot enters automobile cab and starts after automobile, alcohol sensor detects testedIn the gas that personnel breathe out, whether contain alcohol, if contain alcohol, this alcohol sensor sends and wineThe corresponding strength signal of essence concentration is to change-over circuit, and this signal sends corresponding voltage after change-over circuit is processedSignal is to low-pass filter circuit, and this low-pass filter circuit is sent out after the interfering signal in voltage signal is filteredGive central processing unit. Central processing unit is converted to voltage signal alcohol concentration signal and sends to respectively aobviousShow device and holder, display demonstrates alcohol concentration value, and holder stores alcohol concentration value.Meanwhile, central processing unit also sends command signal to driving oscillating circuit and GPS locating module, and this driving is shakenSwing circuit and drive alarm equipment alarm, and GPS locating module starts the real-time geographic position of positioned vehicle, andThe real-time geographic position feedback of vehicle, to central processing unit, central processing unit is the real-time geographic position of vehiclePut and send to wireless transmission circuit, send to traffic to refer to the real-time geographic position of vehicle by wireless transmission circuitWave Surveillance center, so that point duty personnel follow the trail of vehicle.
As mentioned above, just can well realize the present invention.
Claims (8)
1. the traceable alcohol content tester of vibration alarm type based on low-pass filter circuit, mainly by centreReason device, the display being connected with central processing unit respectively, GPS locating module, holder, wireless sensingCircuit, drive oscillating circuit and change-over circuit, with the alarm that drives oscillating circuit to be connected, and with turnChange the alcohol sensor composition that circuit is connected; It is characterized in that, between change-over circuit and central processing unitAlso be serially connected with low-pass filter circuit.
2. a kind of traceable alcohol of vibration alarm type based on low-pass filter circuit according to claim 1Detector, is characterized in that: described low-pass filter circuit is by amplifier P1, amplifier P2, one end and amplificationThe resistance R 12 of the input that the positive pole of device P1 is connected, negative pole forms this low-pass filter circuit, is serially connected inResistance R 13 between positive pole and the output of amplifier P1, anodal be connected with the positive pole of amplifier P1,The capacitor C 12 that negative pole is connected with the output of amplifier P1, the output phase of negative pole and amplifier P1The capacitor C 13 of connection, plus earth, the resistance R 14 with capacitor C 13 is in parallel, is serially connected in amplifier P1Output and the positive pole of amplifier P2 between resistance R 15, anodal be connected with the output of amplifier P1The capacitor C 14, negative pole and the amplification that connect, negative pole are connected with the output of amplifier P2 after resistance R 16The output of device P2 is connected, the capacitor C of plus earth 15, the resistance R 17 being in parallel with capacitor C 15,And the diode that the P utmost point is connected with the negative pole of amplifier P2, the N utmost point is connected with the positive pole of capacitor C 15D10 composition; The minus earth of described amplifier P1; The output of described amplifier P2 forms this low passThe output of filter circuit; The input of described low-pass filter circuit is connected with the output of change-over circuit,Its output is connected with central processing unit.
3. a kind of traceable alcohol of vibration alarm type based on low-pass filter circuit according to claim 2Detector, is characterized in that: described driving oscillating circuit, by the chip U1 that vibrates, drives chip U2, three utmost pointsPipe VT6, negative pole is connected with the DIS pin of vibration chip U1, anodal with the THRE of the chip U1 that vibratesThe capacitor C 8 that pin is connected, the N utmost point is connected with the VCC pin of vibration chip U1 after resistance R 8, PThe diode D8 of ground connection when the utmost point is connected with the GND pin of vibration chip U1 after resistance R 9,Negative pole is connected with the CONT pin of vibration chip U1, positive pole is connected with the P utmost point of diode D8Capacitor C 9, is serially connected in the electricity between vibration chip U1 and OUT pin and the DIS pin of driving chip U2Resistance R10, the N utmost point is connected with the CONT pin of driving chip U2, the P utmost point after resistance R 11 with vibrationThe diode D9 that the TRI pin of chip U1 is connected, positive pole is connected with the OUT pin that drives chip U2The capacitor C 10 connect, negative pole being connected with the base stage of triode VT6, and negative pole and triode VT6Colelctor electrode is connected, the anodal capacitor C 11 of ground connection forms; The VCC pin of described vibration chip U1 withThe positive pole of capacitor C 8 connects 12V voltage when being connected, its RE pin is connected with VCC pin,Its THRE pin forms the input of this driving oscillating circuit when being connected with the N utmost point of diode D8And be connected with central processing unit; The VCC pin of described driving chip U2 and RE pin all with vibration coreThe RE pin of sheet U1 is connected, and its GND pin is connected with the negative pole of capacitor C 11, its TRI pipePin is connected with the colelctor electrode of triode VT6, and the emitter stage of described triode VT6 and its colelctor electrode are commonForm the output of this driving oscillating circuit and be connected with alarm.
4. a kind of traceable alcohol of vibration alarm type based on low-pass filter circuit according to claim 3Detector, is characterized in that: described change-over circuit is by non-linear compensation circuit, with non-linear compensation circuit phaseThe analog to digital conversion circuit connecting, and the mu balanced circuit being connected with analog to digital conversion circuit composition; Described non-lineThe input of property compensating circuit is connected with alcohol sensor, the output of mu balanced circuit with LPF electricityThe input on road is connected.
5. a kind of traceable alcohol of vibration alarm type based on low-pass filter circuit according to claim 4Detector, is characterized in that: described non-linear compensation circuit is by triode VT1, triode VT2, three utmost pointsPipe VT3, the N utmost point is connected with the base stage of triode VT1 after resistance R 1, the P utmost point after capacitor C 1 withThe diode D1 that the base stage of triode VT2 is connected, negative pole is connected with the colelctor electrode of triode VT3,Capacitor C 2 anodal that be connected with the emitter stage of triode VT1 after resistance R 2, anodal through resistance R 3The electric capacity be connected with the emitter stage of triode VT3 afterwards, negative pole being connected with the colelctor electrode of triode VT2C3, two utmost points that the P utmost point is connected with the colelctor electrode of triode VT1, the N utmost point is connected with analog to digital conversion circuitPipe D2, and the P utmost point is connected with the N utmost point of diode D2, the N utmost point is connected with analog to digital conversion circuitDiode D3 composition; The base stage of described triode VT3 is connected with the base stage of triode VT2, its current collectionThe utmost point is connected with analog to digital conversion circuit, and its emitter stage is connected with the emitter stage of triode VT2; DescribedThe colelctor electrode of triode VT2 is connected with analog to digital conversion circuit; The N utmost point of described diode D1 forms thisThe input of non-linear compensation circuit.
6. a kind of traceable alcohol of vibration alarm type based on low-pass filter circuit according to claim 5Detector, is characterized in that: analog-digital conversion circuit as described is by conversion chip U, FET MOS, positive poleThe electric capacity be connected with the colelctor electrode of triode VT3, negative pole being connected with the drain electrode of FET MOSC4, negative pole is connected with the source electrode of FET MOS after inductance L 1, the capacitor C 5 of plus earth, withAnd the N utmost point is connected with the DIN pin of conversion chip U, the P utmost point is connected with the positive pole of capacitor C 4 twoUtmost point pipe D4 composition; The VDD pin of described conversion chip U is connected with the positive pole of capacitor C 4, its CSPin is connected with the N utmost point of diode D3, its GND pin simultaneously with the source of FET MOSThe utmost point is connected with the colelctor electrode of triode VT2, its OUTA pin and REF pin all with mu balanced circuit phaseConnect; The negative pole of described capacitor C 5 is also connected with the N utmost point of diode D2.
7. a kind of traceable alcohol of vibration alarm type based on low-pass filter circuit according to claim 6Detector, is characterized in that: described mu balanced circuit is by triode VT4, triode VT5, unidirectional thyristorD5, the P utmost point is connected with the emitter stage of triode VT5, the N utmost point forms this mu balanced circuit after resistance R 7The Zener diode D7 of output, positive pole in turn after potentiometer R4 and resistance R 5 with Zener diodeThe electricity that the N utmost point is connected, negative pole is connected with the base stage of triode VT5 after Zener diode D6 of D7Hold C7, be serially connected in the resistance R 6 between the base stage of triode VT5 and the OUTA pin of conversion chip U,And positive pole is connected with the base stage of triode VT4, negative pole is connected with the OUTA pin of conversion chip UThe capacitor C 6 connecing forms; The control end of described unidirectional thyristor D5 is connected with the control end of potentiometer R4,Its N utmost point is connected with the positive pole of capacitor C 7, and its P utmost point is connected with the emitter stage of triode VT4;The base stage of described triode VT4 is connected with the REF pin of conversion chip U, its grounded collector; DescribedThe grounded collector of triode VT5.
8. a kind of traceable alcohol of vibration alarm type based on low-pass filter circuit according to claim 7Detector, is characterized in that: described conversion chip U is MAX522 integrated chip, described vibration chipU1 and driving chip U2 are NE555 integrated chip.
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Application publication date: 20160525 |