CN206147304U - Automatic door safety precaution intelligent monitoring system - Google Patents
Automatic door safety precaution intelligent monitoring system Download PDFInfo
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- CN206147304U CN206147304U CN201621126169.2U CN201621126169U CN206147304U CN 206147304 U CN206147304 U CN 206147304U CN 201621126169 U CN201621126169 U CN 201621126169U CN 206147304 U CN206147304 U CN 206147304U
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Abstract
The utility model provides an automatic door safety precaution intelligent monitoring system, including central processing unit, power supply circuit, serial port communication module, alcohol detection circuit, metal coil oscillation circuit, signal acquisition modulate circuit, LCD display screen and acousto -optic warning module, metal coil oscillation circuit passes through the signal acquisition modulate circuit with central authorities handle and connect, central processing unit respectively with the serial port communication module the alcohol detection circuit the LCD display screen and the acousto -optic warning module is connected, power supply circuit with central processing unit connects, is used for doing the central processing unit power supply, central processing unit pass through the serial port communication module is connected with the PC. The utility model discloses use the singlechip as the core, to the measuring of three types of hazardous articles of metal, alcohol and inflammables, whether have certain danger through the singlechip according to sensor detected value intelligent judgment visitor.
Description
Technical field
This utility model is related to building automatic field, more particularly to a kind of automatically-controlled door safety precaution intelligent monitor system.
Background technology
Traditional automatically-controlled door is that people can be authorized the control for being identified as enabling signal near the action of door or certain introduction
Unit, opens door using drive system, and people automatically closes at door after leaving, and to opening and closing control realization
System.In addition, the automatic door special of various discernible controls, such as infrared induction door, touch sensible door, microwave induced door, brush
Card induction door etc. is occurred in trend of the market in succession.At present, automatically-controlled door has been widely used for various occasions, market, bank,
Station etc..
However, these automatically-controlled doors function without safety precaution.And for the safety precaution grade such as bank, school compares
High public place, automatic safety door used is that possess metal detection, inflammable thing detection, and this is to crime prevention event
It is very necessary.
Utility model content
This utility model is directed to existing automatically-controlled door, it is proposed that design an intelligence prison for it using single-chip microcomputer and sensor
Control system.
This utility model is realized according to technical scheme below：
A kind of automatically-controlled door safety precaution intelligent monitor system, it is characterised in that：Including central processing unit, power circuit, string
Mouth communication module, alcohol detection circuit, wire coil oscillating circuit, signal collection modulation circuit, LCD display and acousto-optic
Alarm module, the wire coil oscillating circuit is processed with the central authorities by the signal collection modulation circuit and is connected, described
Central processing unit respectively with the serial communication module, the alcohol detection circuit, the LCD display and the acousto-optic report
Alert module connection, the power circuit is connected with the central processing unit, for powering for the central processing unit, it is described in
Central processing unit described in central processor is connected with the serial communication module.
Further, the wire coil oscillating circuit includes multivibrator, and resistance R1 and resistance R2 is multi-resonant
The timing element of device is swung, one end connection power supply of resistance R1, the other end of resistance R1 and R2 series connection and electric capacity C1 are connected in series, electricity
Hold C1 ground connection, the pin of open-collector output 7 is accessed in the middle of resistance R1 and R2, the pin of trigger input end 2 of intervalometer and threshold
The value pin of input 6 is connected with electric capacity C1, and extraneous control signal is grounded by electric capacity C2, the pin of positive pulse signal 3 of output
The base terminal of Q1 amplifying circuits is input to by electric capacity C3, after Q1 amplifying circuits amplify, is input into into inductance coil L1,
A constant alternating magnetic field is produced around inductance coil L1.
Further, the signal collection modulation circuit includes that operational amplifier LM324, electric capacity C11 make by coupling
With the input that the output signal of the wire coil oscillating circuit is sent to the operational amplifier LM324, the computing
Amplifier LM324 be amplified after by voltage signal conversion voltage in couples.
Further, the alcohol detection circuit includes that gas sensor, data processing module, secure threshold arrange electricity
Road and threshold value storage system, the data processing module respectively with the gas sensor, the secure threshold arrange circuit and
The threshold value storage system connection.
Further, the gas sensor be MQ-3 alcohol sensors, the air-sensitive material of the MQ-3 alcohol sensors
Expect for tin ash.
Further, described secure threshold arranges circuit to be included resistance R4, resistance R5, resistance R6 and corresponds to respectively
In resistance R4, resistance R5, the button S2 of resistance R6, button S3, button S4, described button S2 is used to arrange threshold value, described
Button S3 is used to increase threshold value, and described button S4 is used to reduce threshold value.
Further, the LCD display is industrial character mode lcd display screen LCD1602.
Further, described acoustooptic alarm system includes acousto-optic diode, buzzer and PNP triode, described
PNP triode be used for drive circuit, described acousto-optic diode is connected in parallel with the buzzer.
Further, described power circuit includes the first reduction voltage circuit and the second reduction voltage circuit, the first described drop
Volt circuit includes a circuit of three-terminal voltage-stabilizing integrated block LM7809, and second reduction voltage circuit includes that another three-terminal voltage-stabilizing is integrated
Circuit block LM2940-5s.
This utility model compared with prior art, with obvious beneficial effect：Monitoring system of the present utility model can be visited
Survey visitor whether there is carrying dangerous materials, if carrying cutter, firearms are flammable, during explosive material, are automatically switched off automatically-controlled door, so as to carry
The safety precaution grade of high automatically-controlled door.Additionally, monitoring system simple structure of the present utility model, low price, and it is convenient to
The automatically-controlled door of installation carries out safety upgrade so that automatically-controlled door of the tradition without intelligent monitoring ability improves safe class, and system
Improved economic cost is not high, and retrofit work amount is few.
Description of the drawings
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or the accompanying drawing to be used needed for description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, in the premise for not paying creative work
Under, can be obtaining other accompanying drawings according to these accompanying drawings.
Fig. 1 is a kind of automatically-controlled door safety precaution intelligent monitor system principle schematic of the present utility model；
Fig. 2 is sound and light alarm module schematic diagram of the present utility model；
Fig. 3 is that secure threshold of the present utility model arranges circuit diagram；
Fig. 4 is serial communication module circuit diagram of the present utility model；
Fig. 5 is the threshold value storage system circuit diagram of eeprom chip of the present utility model；
Fig. 6 is wire coil oscillating circuit schematic diagram of the present utility model；
Fig. 7 is electromagnetic signal acquisition modulate circuit schematic diagram of the present utility model；
Fig. 8 is MQ-3 alcohol sensors module principle figure of the present utility model；
Fig. 9 is power-supplying circuit schematic diagram of the present utility model；
Figure 10 is metal detection flow chart of the present utility model；
Figure 11 is Keyboard Control flow chart of the present utility model；
Figure 12 is digital filtering flow chart of the present utility model；
Figure 13 is display alarm flow chart of the present utility model.
Specific embodiment
It is new below in conjunction with this practicality to make purpose, technical scheme and the advantage of this utility model embodiment clearer
Accompanying drawing in type embodiment, is clearly and completely described, it is clear that retouched to the technical scheme in this utility model embodiment
The embodiment stated is a part of embodiment of this utility model, rather than the embodiment of whole.
Fig. 1 is a kind of automatically-controlled door safety precaution intelligent monitor system principle schematic of the present utility model, as shown in figure 1,
A kind of automatically-controlled door safety precaution intelligent monitor system, it is characterised in that：Including central processing unit, power circuit, serial communication mould
Block, alcohol detection circuit, wire coil oscillating circuit, signal collection modulation circuit, LCD display and sound and light alarm module,
PC, the wire coil oscillating circuit is processed with the central authorities by the signal collection modulation circuit and is connected, the central authorities
Processor respectively with the serial communication module, the alcohol detection circuit, the LCD display and the sound and light alarm mould
Block connects, and the power circuit is connected with the central processing unit, for powering for the central processing unit, described centre
Reason device is connected with the serial communication module.
Fig. 2 is sound and light alarm module schematic diagram of the present utility model, and this utility model adopts the crystal triode of a PNP
Carry out drive circuit, the pin P3.4 of STC single-chip microcomputers is selected when designing circuit to connect the input port of PNP transistor base stage.When
When the pin P3.4 of STC single-chip microcomputers is externally output as high level " 1 ", the PNP triode would be at conducting state, and voltage has+
5V, the two ends of the buzzer of the magnitude of voltage input piezoelectric type cause it to send tweeting sound；It is when P3.4 is in normal condition, i.e., defeated
Go out for low level " 0 " when, now PNP triode then be in cut-off state, the two ends of the buzzer of piezoelectric type are forced without voltage,
At this moment buzzer will not send the alarm of buzz.If mode of the buzzer with light emitting diode in parallel is connected, can
Save I/O ports, it is also possible to save the resource of the hardware of single-chip microcomputer.Certainly, while buzzer sounds the alarm and rings, series connection
Diode also can at once send light.The function of PNP triode is equivalent to a switch, then employs 8550 audions
Carry out drive circuit.
In this utility model, the alcohol detection circuit includes that gas sensor, data processing module, secure threshold are arranged
Circuit and threshold value storage system, the data processing module arranges circuit with the gas sensor, the secure threshold respectively
With threshold value storage system connection.The gas sensor be MQ-3 alcohol sensors, the gas of the MQ-3 alcohol sensors
Quick material is tin ash.
Fig. 3 is that secure threshold of the present utility model arranges circuit diagram, described secure threshold arrange circuit include resistance R4,
Resistance R5, resistance R6 and resistance R4, resistance R5, the button S2 of resistance R6, button S3, button S4 are corresponded respectively to, it is described
Button S2 is used to arrange threshold value, and described button S3 is used to increase threshold value, and described button S4 is used to reduce threshold value.Resistance R4,
Resistance R5, the size of resistance R6 are all 1k Ω.
LCD display is industrial character mode lcd display screen LCD1602, is directly connected with central processing unit.
Fig. 4 is serial communication module circuit diagram of the present utility model, in order to by the ethanol detected in surrounding
Concentration and combustable gas concentration value are sent to PC, and communication module pattern is that data are mutually transmitted in the form of serial ports
's.Because the serial ports of PC is RS232 level, serial line interface is but Transistor-Transistor Logic level, it is therefore desirable to level conversion, Ke Yiyi
Complete by the conversion chip MAX232 of level, just detection circuit and PC can be coupled together after conversion.The pin of chip 6
It is grounded by electric capacity C10, the pin of chip 2 is connected by electric capacity C9 with VCC, and 1 pin is connected with 3 pins by electric capacity C6, pin 4
Connected by electric capacity C4 with pin 5,10 pins connect a resistance R13,11 pins are connected by resistance R10 with VCC, 16 pins
Be directly connected to VCC, 15 pins ground connection, 9 pins connection resistance R16,8 pins are connected with 3 pins of adapter, 7 pins be connected
The 2 pins connection of device.Resistance R10, resistance R13, the value of resistance R16 are all 10K Ω, electric capacity C4, electric capacity C6, electric capacity C9, electric capacity
The value of C10 is all the 10 4 power pico farads for being multiplied by 10, that is, 100000pF.
At the same time, need setting rule to ensure the intelligent monitor system and PC normal communication of safety door, this practicality
In new, baud rate should be set as 9600bps, and it is 1 that the form of information should be arranged to start bit, and stop position is 1, data bit
For 8, without parity check bit；Asynchronous serial interface communication mode is also realized, PC receives the side of the mode using inquiry of data
Method, and the intelligent monitor system of safety door is then the control command for receiving PC using interrupt mode.
Fig. 5 is the threshold value storage system circuit diagram of eeprom chip of the present utility model, it is contemplated that ethanol gas concentration surpasses
Mark warning system may be because of different detection environment, and threshold value setting can be different, while in order to prevent from use may be used
Can occur it is interim stop power supply suddenly, in order to avoid such case, an outside EEPROM module is increased, for completing
Storage to external data, intelligent monitor system of the present utility model is from the communication modes EEPROM based on I2C buses
AT24C04.AT24C02 is a class eeprom chip of 2Kbit (256Bytes) the type I2C bus produced under atmel corp.
Wherein, the SDA pins of AT24C02 chips are not only the serial address of I2C buses, are also data input and output
Pin, in the design of component, it is a two-way data transmission port, in general, as transfer address and
Data enter device inside, or use as the element of receiving data in a device.Due to being open-drain, therefore it is accomplished by
A pull-up resistor in external connection, so ability protection circuit are realized normally using.And why SDA can transmit data, only
Can be when SCL serial clocks be low level state.And when SCL is high level, the situation of change of SDA be as indicate to start with
The condition of stopping.
The SCL pins of AT24C02 chips are the serial clock ports of I2C bus clocks, between synchronous master-slave equipment
Time.The threshold value of ethanol gas concentration will be stored in eeprom chip AT24C02, wherein, pin A0, A1 and A2 are chip
Addressing of address pin, due to only one of which 24C02 in circuit, therefore only this three pins need to be connected to ground terminal simultaneously.
And pin SCL and SDA be device AT24C02 with single-chip microcomputer carry out communication exchanges I2C buses clock line and data wire.VCC
Connect resistance R23 between pin and SCL pins, resistance R25, resistance R23, resistance R25 are connected between VCC pin and SDA pins
Resistance value be 10K Ω.
Fig. 6 is wire coil oscillating circuit schematic diagram of the present utility model, and wire coil oscillating circuit includes multi-harmonic-oscillations
Device, resistance R1 and resistance R2 for multivibrator timing element, resistance R1 one end connection power supply, the other end of resistance R1 and
R2 connects and electric capacity C1 is connected in series, and electric capacity C1 ground connection, the pin of open-collector output 7 is accessed in the middle of resistance R1 and R2, fixed
When device the pin of trigger input end 2 and the pin of threshold value input 6 be connected with electric capacity C1, extraneous control signal is connect by electric capacity C2
Ground, the pin of positive pulse signal 3 of output is input to the base terminal of Q1 amplifying circuits by electric capacity C3, amplifies through Q1 amplifying circuits
Afterwards, it is input into into inductance coil L1, a constant alternating magnetic field is produced around inductance coil L1.Inductance coil and electricity
NC1 is in parallel for resistance, wherein, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C5, the size of electric capacity C7 are the 10 3 power pico farads for being multiplied by 10,
Resistance R1, resistance R2, the resistance value of resistance R10 are 2K Ω, and it is that 675 Ω, resistance R12 are 200 that resistance R9 is 18K Ω, resistance R11
Ω, resistance NC1 are 1K Ω.
Fig. 7 is electromagnetic signal acquisition modulate circuit schematic diagram of the present utility model, and the system adopts ALELGRO companies of the U.S.
Integrated linear Hall sensor is used for monitoring the change of coil Ll surrounding magnetic fields.The major function of integrated linear Hall sensor is
Linearly the magnetic field intensity signal for sensing can be changed into voltage signal.The integrated linear Hall sensor is first by Hall
The linear differential amplifier of part, emitter follower and high-gain property is integrated on same semiconductor chip, by dispatch from foreign news agency potential source
Drive.
However, the voltage signal that linear hall element is collected is substantially the voltage signal of a millivolt level, signal ratio
It is fainter, it need to be amplified, can just be further processed the signal.This utility model operational amplifier LM324, it is integrated
Linear hall element output small-signal, electric capacity C11 believed the output of the wire coil oscillating circuit by coupling
Number be sent to the input of the operational amplifier LM324, the operational amplifier LM324 be amplified after by voltage signal
Conversion voltage in couples.
In the circuit design of system, for the different signal of intensity, the amplification system of prime is may be adjusted
Feedback potentiometer size so that changing its amplification.By the amplification signal of the operational amplifier of prime through coupling
Close and be input into the peak detection circuit system of rear class after electric capacity C14.Take the mode of resistance-capacitance coupling, it becomes possible to by before and after
The quiescent point of the circuit system of level keeps absolute construction, isolates influencing each other between quiescent points at different levels, the electricity
Total temperature drift on road would not be too big.
And peak detection circuit is mainly made up of two-stage calculation amplifier, the operational amplifier LM324 of the first order is defeated
The peak value for entering signal is delivered to electric capacity C16, and remains behind；Second level operational amplifier LM324 constitutes buffer amplifier structure,
Come output signal and electric capacity are mutually isolated.
1. when input voltage Vi2 starts to occur rising, Vo2 also can change therewith causes numerical value to rise so that two
Pole pipe D3 is both turned on D4, and diode D2 is in cut-off state, and operational amplifier LM324 is in profound and negative feedbck state, electric capacity
C16 is started to charge up, and Vc magnitudes of voltage rise.
2. when input voltage Vi2 starts to occur declining, Vo2 also can change therewith causes numerical value to decline, and D2 leads
Logical, operational amplifier LM324 is also at profound and negative feedbck state, but profound and negative feedbck at least can ensure that diode D3,
The reliable cut-off of D4, the magnitude of voltage of Vc can be maintained.
3. when input voltage Vi2 starts again at rising, Vo2 can be made again to increase, and D3, D4 are on, D2
In cut-off, if being now charged to electric capacity C16 (and magnitude of voltage when ensureing that voltage Vc is higher than previous charging) again,
When input voltage Vi2 declines, diode D3, D4 can be in cut-off state again, and diode D2 begins to turn on, and Vc will
Peak state is kept again.
Output voltage Vo can be with the size of reflecting voltage Vc, and the faint voltage signal for collecting is through peak-detector circuit
And the circuit of rear class Hyblid Buffer Amplifier can be amplified to the DC level state of 0-5V, so as to the A/D moduluses for meeting single-chip microcomputer turn
The transformation range of the input voltage required by mold changing block, finally again by A/D analog-to-digital conversion modules circuit the peak value for detecting
Signal changes into digital quantity.
Wherein, electric capacity C11 is that 10uF, electric capacity C16 are 100pF, resistance R17, resistance R18, resistance for 22uF, electric capacity C14
R19, resistance R22 are that 470K Ω, resistance R24 are 500K Ω, the maximum resistance of variable resistance R20 for 20K Ω, resistance R21
Maximum resistance for 50K Ω and variable resistance R27 is 5K Ω.
Fig. 8 is MQ-3 alcohol sensors module principle figure of the present utility model, and the gas sensitive of MQ-3 alcohol sensors is
Tin ash.When there is alcohol steam granule in the air that gas sensor MQ-3 is placed, gas sensor
The electrical conductivity of MQ-3 will because the alcohol steam in environment be alcohol gas concentration change change, alcohol gas are dense
When degree increases, electrical conductivity also increases therewith, and this utility model can realize that alcohol steam concentration is gathered.
Fig. 9 is power-supplying circuit schematic diagram of the present utility model, described power circuit include the first reduction voltage circuit and
Second reduction voltage circuit, the first described reduction voltage circuit includes a circuit of three-terminal voltage-stabilizing integrated block LM7809, second blood pressure lowering
Circuit includes another circuit of three-terminal voltage-stabilizing integrated block LM2940-5s.
Figure 10 be metal detection flow chart of the present utility model, when detection range does not have metal, it is assumed that Hall end it is defeated
Go out voltage for U0, voltage signal U0It is clearly very faint, only belong to mV level signals, voltage signal U0Through the amplification of amplifying circuit,
After passing through the detecting circuit of peak value again, the peak output voltage U of corresponding 0～5V can be just obtained0, and to meet ADC0809
Range, after the A/D analog digital conversion in single-chip microcomputer, by output voltage U0Digital quantity be input to STC single-chip microcomputers and stored up
Deposit.Hereafter, just the voltage signal can be regarded as reference voltage.
When there is detection coil L1During close metal object, according to the phenomenon of electromagnetic induction, send out will detection inductance value
Raw to change, so as to cause the magnetic field around it also accordingly to change, Hall element senses the magnetic field having changed and for, will
It is linearly changed into voltage signal Ux, the voltage changed because of changes of magnetic field through amplifying circuit and peak-detector circuit it
Afterwards, the peak output voltage U of corresponding 0-5V is obtainedx, and then it is entered into central authorities after A/D analog digital conversion again
Processor CPU, is completed to peak output voltage U by central processor CPUxWith reference voltage U0Contrast, the two is compared to each other it
Afterwards, by (Ux-U0) difference is obtained, the difference is compared again with default sensitivity △ U.Sensitivity △ U can be by keyboard
Control circuit in each key be input into, the respective value after LCD display can press on each key shows, certainly, spirit
The setting of the size of sensitivity △ U will directly decide the precision height of system.If | Ux-U0|>△ U, determine that what is detected
Output signal is gone driven for emitting lights diode to carry out luminous carrying by the really metal of article, the delivery outlet P1.0 of central processor CPU
Show alarm indicator, while P3.4 control buzzer sensings send the sound, carry out audible alarm prompting.
Similarly, in detected gas, first have to be preheated three minutes to MQ-3 gas sensors.Program initialization terminates
Afterwards, system enters monitor state, at the same time carries out fault detect investigation to the heater strip of sensor MQ-3, then takes software to survey
The method of examination is checking that either whether cable situations such as broken string or loose contact occurs for the heater strip of sensor, investigates one by one
After reuse.Then the gas concentration signal by detecting to sensor is carried out passing to single-chip microcomputer after A/D conversions and carries out data
Process, concentration value compared with alarm limit setting value, if in environment alcohol concentration value carry out if the safety threshold reporting to the police with
Open exhaust apparatus and otherwise continue detection.
Figure 11 is Keyboard Control flow chart of the present utility model.First, initialize, and open interruption, then CK call key sweeping
Subprogram is retouched, to determine whether that key is pressed, if then calling key assignments to judge subprogram, including function key, plus 1 key, subtract 1
Key, determination key.
Figure 12 is digital filtering flow chart of the present utility model, and the noise inhibiting ability of metal-detecting function is metal detection
Major design index.Due to often encountering various instantaneous interferences, intelligence of the present utility model in collection voltages value
Energy monitoring system solves the problems, such as instantaneous interference using the method for digital averaging filtering, i.e., in the gatherer process of primary voltage value
In, promptly in a short period of time at least 6 times are carried out to magnitude of voltage and gathered, magnitude of voltage is converted to after digital quantity, then sue for peace,
Analysis draws the maxima and minima in this 6 times inputs, then deletes maxima and minima, obtains averagely divided by number 4
The method of value, completes data acquisition filtering.This utility model can save complexity using the method for digital averaging filtering
Hardware circuit design, and more preferable, more accurate filter effect can also be obtained.
It can be seen from above-mentioned filtering method, pendulous frequency N is bigger, and signal smoothing degree is higher, and sensitivity is just reduced, so
And the control system is to need higher sensitivity, thus pendulous frequency N values be difficult it is excessive.One starting sample week is set
Phase, then continuous sampling 6 times delete maxima and minima in sampled data, and remaining data are carried out into accumulating operation, then
Its arithmetic mean of instantaneous value is sought, using the value as the sampled value in this cycle, then the final data internal storage of single-chip microcomputer is stored to into
In RAM headed by 30H location data storage.Wherein, maximum is stored in depositor R2On, minima is stored in depositor R3
On, add up and deposit in depositor R4, the times N of continuous sampling deposits in R0。
Figure 13 is display alarm flow chart of the present utility model, and the setting of the value of its medium sensitivity △ U is key issue, journey
The value of △ U is stored in the 20H addresses of single-chip microcomputer memory RAM in sequence.In detection process, A/D converter is collected
Voltage signal, be stored in Jing after numerical filtering in the data storage in internal storage RAM with first location as 30H, then by this
Data Ux and reference voltage U0It is compared, the two difference U is stored in the memorizer that Chip Microcomputer A RM address is 22H.Then again
This difference U is compared with sensitivity △ U by criterion algorithm, to determine whether as warning keyboard control circuit set by
The value of each sensitivity, and the corresponding numerical value after LCD display display button.
Intelligent monitor system of the present utility model with single-chip microcomputer as core, to metal, ethanol and the class dangerous materials of inflammable thing three
Detection, whether certain risk is had according to sensor detected value intelligent decision visitor by single-chip microcomputer, such as there is certain danger
It is dangerous to start the system of closing the door automatically by electromagnetic valve.Wherein, metal detection adopts integrated linear hall element as sensing
Device, by sensing the eddy current effect of metal the change in hot-wire coil magnetic field is caused, then changes of magnetic field is converted into into change in voltage, by
Single-chip microcomputer measures magnitude of voltage, and compared with the reference value of the voltage of setting after, judge whether to detect metal；Ethanol
Detection be then using the test of MQ-3 alcohol gas sensors to alcohol concentration, by single-chip microcomputer signal is carried out analog digital conversion and
Process, then show signal output with liquid crystal display screen, but also with threshold value set-up function, can be according to laws and regulations or user
Setting changing threshold value, as long as concentration of alcohol exceedes the threshold value of setting, system will make blinking red lamp report to the police；And natural gas is examined
Survey and alcohol detection principle basic simlarity.
Based on the embodiment in this utility model, those of ordinary skill in the art are not under the premise of creative work is made
The all other embodiment for being obtained, belongs to the scope of this utility model protection.Although this utility model just side of being preferable to carry out
Formula is illustrated and has been described, it is understood by those skilled in the art that without departing from claim of the present utility model
Limited range, can carry out variations and modifications to this utility model.
Claims (9)
1. a kind of automatically-controlled door safety precaution intelligent monitor system, it is characterised in that：Including central processing unit, power circuit, serial ports
Communication module, alcohol detection circuit, wire coil oscillating circuit, signal collection modulation circuit, LCD display and sound and light alarm
Module, the wire coil oscillating circuit is processed with the central authorities by the signal collection modulation circuit and is connected, the central authorities
Processor respectively with the serial communication module, the alcohol detection circuit, the LCD display and the sound and light alarm mould
Block connects, and the power circuit is connected with the central processing unit, for powering for the central processing unit, described centre
Reason device is connected with the serial communication module.
2. a kind of automatically-controlled door safety precaution intelligent monitor system according to claim 1, it is characterised in that：The metal wire
Circle oscillating circuit includes multivibrator, and resistance R1 and resistance R2 is the timing element of multivibrator, and one end of resistance R1 connects
Power supply is connect, the other end of resistance R1 and R2 series connection and electric capacity C1 are connected in series, and electric capacity C1 ground connection, open-collector output 7 draws
Foot is accessed in the middle of resistance R1 and R2, and the pin of trigger input end 2 and the pin of threshold value input 6 of intervalometer are connected with electric capacity C1, outward
Boundary's control signal is grounded by electric capacity C2, and the pin of positive pulse signal 3 of output is input to Q1 amplifying circuits by electric capacity C3
Base terminal, after Q1 amplifying circuits amplify, is input into into inductance coil L1, and a perseverance is produced around inductance coil L1
Fixed alternating magnetic field.
3. a kind of automatically-controlled door safety precaution intelligent monitor system according to claim 1, it is characterised in that：The signal is adopted
Collection modulate circuit includes that operational amplifier LM324, electric capacity C11 pass through coupling by the output of the wire coil oscillating circuit
Signal is sent to the input of the operational amplifier LM324, and the operational amplifier LM324 believes voltage after being amplified
Number conversion voltage in couples.
4. a kind of automatically-controlled door safety precaution intelligent monitor system according to claim 1, it is characterised in that：The ethanol inspection
Slowdown monitoring circuit includes that gas sensor, data processing module, secure threshold arrange circuit and threshold value storage system, the data processing
Module arranges circuit with the gas sensor, the secure threshold respectively and the threshold value storage system is connected.
5. a kind of automatically-controlled door safety precaution intelligent monitor system according to claim 4, it is characterised in that：The air-sensitive is passed
Sensor is MQ-3 alcohol sensors, and the gas sensitive of the MQ-3 alcohol sensors is tin ash.
6. a kind of automatically-controlled door safety precaution intelligent monitor system according to claim 4, it is characterised in that：Described safety
Threshold value arranges circuit to be included resistance R4, resistance R5, resistance R6 and corresponds respectively to resistance R4, resistance R5, the button of resistance R6
S2, button S3, button S4, described button S2 is used to arrange threshold value, and described button S3 is used to increase threshold value, described button
S4 is used to reduce threshold value.
7. a kind of automatically-controlled door safety precaution intelligent monitor system according to claim 1, it is characterised in that：The LCD shows
Display screen is industrial character mode lcd display screen LCD1602.
8. a kind of automatically-controlled door safety precaution intelligent monitor system according to claim 1, it is characterised in that：Described acousto-optic
Warning system includes acousto-optic diode, buzzer and PNP triode, and described PNP triode is used for drive circuit, described
Acousto-optic diode is connected in parallel with the buzzer.
9. a kind of automatically-controlled door safety precaution intelligent monitor system according to claim 1, it is characterised in that：Described power supply
Circuit includes the first reduction voltage circuit and the second reduction voltage circuit, and the first described reduction voltage circuit includes a circuit of three-terminal voltage-stabilizing integrated
Block LM7809, second reduction voltage circuit includes another circuit of three-terminal voltage-stabilizing integrated block LM2940-5s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621126169.2U CN206147304U (en) | 2016-10-14 | 2016-10-14 | Automatic door safety precaution intelligent monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621126169.2U CN206147304U (en) | 2016-10-14 | 2016-10-14 | Automatic door safety precaution intelligent monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206147304U true CN206147304U (en) | 2017-05-03 |
Family
ID=58621195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201621126169.2U Expired - Fee Related CN206147304U (en) | 2016-10-14 | 2016-10-14 | Automatic door safety precaution intelligent monitoring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106707841A (en) * | 2016-10-14 | 2017-05-24 | 广东技术师范学院 | Automatic door security protection intelligent monitoring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106707841A (en) * | 2016-10-14 | 2017-05-24 | 广东技术师范学院 | Automatic door security protection intelligent monitoring system |
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