CN206306997U - A kind of vapour-pressure type sensing vehicle intrusion detection means based on OBD interfaces - Google Patents
A kind of vapour-pressure type sensing vehicle intrusion detection means based on OBD interfaces Download PDFInfo
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- CN206306997U CN206306997U CN201621448196.1U CN201621448196U CN206306997U CN 206306997 U CN206306997 U CN 206306997U CN 201621448196 U CN201621448196 U CN 201621448196U CN 206306997 U CN206306997 U CN 206306997U
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Abstract
Sense vehicle intrusion detection means the utility model discloses a kind of vapour-pressure type based on OBD interfaces, in-car Measurement System of Air Pressure, alarm unit, the invasion check system being connected including scm managing system and with scm managing system, the signal of pressure sensor amplifies, send processor of single chip computer after shaping to, and processor of single chip computer judges whether pressure change is pressure change that automobile door opening causes；Restart invasion check system after automobile door opening condition is met, microwave remote sensor is further advanced by be checked to determine whether the detection method for illegal invasion, and the illegal invasion information can be informed into user immediately so that user takes counter-measure in time, provide the user with living safety service.The utility model accuracy of detection is high, and can effectively solve automobile different automobile types, the individual difference of producer, is not limited in itself by vehicle structure, there is preferable versatility.
Description
Technical field
The utility model is related to automotive theft proof system and its theft preventing method, more particularly to a kind of air pressure based on OBD interfaces
Formula senses vehicle intrusion detection means.
Background technology
With economic fast development, the recoverable amount of automobile is increased sharply, and at the same time, the stolen quantity of automobile is also presented
The trend of liter, therefore, various automotive theft proof systems arise at the historic moment.Current automobile burglar means are very more, especially in conjunction with state
Inside and outside correlation technique and enterprise self-determining are researched and developed, and already have various automobile burglar technologies such as mechanical, electronic type, network type,
But these anti-theft techniques are only for stolen in vehicle complete vehicle, even if there is the stolen possibility being also also retrieved of vehicle
Property.
In numerous anti-theft products, mainly trigger alarm by shaking, and this mode easily by surrounding environment because
Element influence, such as automobile passes through, sets off firecrackers, thunders from the side, it is easy to produce wrong report, and high-decibel is sent after alarm
Sound prompting, easily disturb residents.
Chinese patent CN101301880A discloses a kind of automotive theft proof system and its theft preventing method, including cell phone system,
Baroceptor, alignment system machine amplifying circuit.Baroceptor is connected with amplifying circuit, amplifying circuit and alignment system with
Cell phone system is connected, and when the car door of automobile is unlocked or vehicle window is destroyed, the in-car air pressure change of baroceptor sensing is simultaneously
Air pressure change signal is produced to be amplified signal, amplifying circuit carries out method to the air pressure change signal that baroceptor is sensed,
The signal of cell phone system method of reseptance circuit output and using cell phone system real-time communication function to car owner send automobile be stolen
Information, the positional information that alignment system sends automobile is easy to real-time tracking automobile to determine current car position.But the patent
In cannot confirm that air pressure change is that automobile door opening causes, or extraneous factor causes, and rate of false alarm is larger.Also have at present by from vapour
Car OBD mouthfuls (On-Board Diagnostic, onboard diagnostic system) obtains vehicle trouble states, such as vehicle door status, boot
State, to detect after exception and by certain mode inform user and take measures.However, due to various, each family of kinds of automobile
All all employ proprietary protocol to a certain extent at OBD mouthfuls, the compatibility of this kind of product cannot accomplish that all vehicles are all compatible, need
Different automobile types matched, tested, consume substantial amounts of research and development time, even part this kind of product can cause the automobile cannot to make
With this will cause certain puzzlement to user's selection, be made troubles to user on the contrary.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, there is provided a kind of vapour-pressure type based on OBD interfaces
Sensing vehicle intrusion detection means, in pressure sensor detection automobile bodies, the air pressure variations in boot, when meeting vapour
During the pressure change condition that car enabling causes, start invasion check system, be further advanced by microwave remote sensor and checked
Determine whether the detection method for illegal invasion, and the illegal invasion information can be informed into user so that user adopts in time immediately
Counter-measure is taken, living safety service is provided the user with.
To achieve the above object, the technical solution adopted in the utility model is as follows：
A kind of vapour-pressure type sensing vehicle intrusion detection means based on OBD interfaces, including the list being connected with vehicle-mounted OBD interfaces
Piece machine processing system, in-car Measurement System of Air Pressure, the alarm unit being connected with scm managing system；
The scm managing system include processor of single chip computer, and be connected to processor of single chip computer periphery clock shake
Swing unit, power supply unit, reset unit；
The in-car Measurement System of Air Pressure includes：
Baroceptor, for detecting the pressure change signal of automotive interior, and is converted to voltage by pressure change signal
Signal；
First amplifying unit, its input is connected with the output end of baroceptor, for amplifying baroceptor detection
The voltage signal of the interior pressure change arrived；
First shaping unit, its input is connected with the output end of the first amplifying unit, for amplifying single to described first
The voltage signal of unit's transmission carries out shaping；
Also include invasion check system, the invasion check system includes：
Microwave remote sensor, the voltage signal produced by frequency change that the human motion for detecting motor vehicle environment causes；
Second amplifying unit, its input is connected with the output end of microwave remote sensor, for amplifying microwave remote sensor detection
To human motion cause frequency change produced by voltage signal；
Second shaping unit, its input is connected with the output end of the second amplifying unit, for amplifying single to described second
The voltage signal of unit's transmission carries out shaping；
The output end of first shaping unit and the second shaping unit with the down trigger port of processor of single chip computer
The signal of connection, the first shaping unit and the output of the second shaping unit is used to wake up the A/D moduluss of conversion inside processor of single chip computer
Block；
The output end of first amplifying unit and the second amplifying unit A/D end of converts simultaneously with processor of single chip computer
Mouth connection, after the A/D modular converters inside processor of single chip computer are waken up, processor of single chip computer is adopted by A/D conversion ports
Collect the analog signal of the first amplifying unit or the second amplifying unit；
Trigger element is additionally provided between the processor of single chip computer and microwave remote sensor, when processor of single chip computer judges vapour
When the pressure change signal in in-car portion exceedes the setting value inside processor of single chip computer, microwave sensor operational is triggered, gather vapour
The voltage signal produced by frequency change that human motion around car causes；
The vehicle-mounted OBD interfaces (600) are connected by power transfer module (700) with processor of single chip computer (110), are used for
Stable operating voltage is provided to processor of single chip computer (110) and the unit being connected with processor of single chip computer (110).
Further, also, when automobile is subjected to outside invasion, it is used for including the transmission unit being connected with processor of single chip computer
Warning information is sent to user.
Preferably, the baroceptor uses Electret condenser microphone.
Yet further, first amplifying unit is identical with the circuit structure of the second amplifying unit, including is sequentially connected
Signal amplification circuit and low-pass filter circuit, if the signal amplification circuit is by the first operational amplifier IC1A and its periphery
Dry resistor, capacitor, adjustable potentiometer composition；The low-pass filter circuit by the second operational amplifier IC1B filter circuits and
Some resistors of its periphery, capacitor bank into；And the output end of the second operational amplifier IC1B passes through two electricity respectively
Resistance device branches into two-way output signal, and output signal supplies the A/D conversion ports of processor of single chip computer, another road output letter all the way
Number supply the first shaping unit/the second shaping unit.
Further, first shaping unit is identical with the circuit structure of the second shaping unit, including upper window
Comparator circuit and lower window comparator circuit, the upper window comparator circuit and lower window comparator circuit are respectively by the 3rd
Some resistors of operational amplifier IC1C and four-operational amplifier IC1D and its periphery, capacitor bank into；First amplifies single
The output signal of unit/the second amplifying unit via after upper window comparator circuit, lower window circuit respectively to processor of single chip computer
Positive shaped waveforms and negative sense shaped waveforms are provided.
Compared with prior art, the beneficial effects of the utility model are：
(1) intruding detection system of the present utility model passes through detection of the baroceptor to automobile interior air pressure changes of vehicle, and
Checked by microwave remote sensor；Meanwhile, the method checked by double mirror of air pressure and microwave effectively reduces wrong report, improves
The reliability of intruding detection system；Processor of single chip computer is connected by power transfer module with vehicle-mounted OBD interfaces, it is not necessary to more
Change the circuit on automobile, just can preferably realize that vehicle intrusion is detected, it is easy to use, do not limited in itself by vehicle structure, have
Preferable versatility；Meanwhile, tradition is changed by way of vehicle-mounted OBD interfaces gather warning message, improve warning message and adopt
The accuracy of collection.
(2) times magnification is adjusted by adjustable potentiometer in the first amplifying unit and the second amplifying unit in the utility model
Number, efficiently solves and amplifies the inconsistent situation of signal caused by sensor individuals difference at baroceptor, microwave, improves
Accuracy.
Brief description of the drawings
Fig. 1 is control system block diagram of the present utility model.
Fig. 2 is the circuit diagram of the first amplifying unit in the utility model.
Fig. 3 is the circuit diagram of the first shaping unit in the utility model.
Fig. 4 be in the utility model pressure sensor signal by the first amplifying unit waveform diagram.
Fig. 5 is amplification signal in Fig. 4 by the waveform diagram after the first shaping unit.
Fig. 6 is the circuit diagram of scm managing system in the utility model.
Fig. 7 is the circuit diagram of trigger element in the utility model.
Fig. 8 is control flow chart of the present utility model.
Parts thereof in accompanying drawing is entitled：
110- processor of single chip computer, 120- clock oscillation units, 130- power supply units, 140- reset units, 210- air pressure
Sensor, the amplifying units of 220- first, the shaping units of 230- first, 300- alarm units, 410- microwave remote sensors, 420- second
Amplifying unit, the shaping units of 430- second, 440- trigger elements, 500- transmission units, the vehicle-mounted OBD interfaces of 600-, 700- power supplys
Modular converter.
Specific embodiment
The utility model will be further described below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of vapour-pressure type sensing vehicle intrusion detection means based on OBD interfaces, including：Single-chip microcomputer treatment
System, in-car Measurement System of Air Pressure, invasion check system；The scm managing system includes processor of single chip computer 110, and
It is connected to clock oscillation unit 120, power supply unit 130, the reset unit 140 of the periphery of processor of single chip computer 110；Single-chip microcomputer treatment
Device 110 is connected by power transfer module 700 with vehicle-mounted OBD interfaces 600, to processor of single chip computer 110 and with single-chip microcomputer at
The unit of the reason connection of device 110 provides the operating voltage of stabilization.
The in-car Measurement System of Air Pressure includes：
Baroceptor 210, for detecting the pressure change signal of automotive interior, and is converted to electricity by pressure change signal
Pressure signal；
First amplifying unit 220, its input is connected with the output end of baroceptor 210, for amplifying air pressure sensing
The voltage signal of the reaction interior pressure change that device 210 is detected；
First shaping unit 230, its input is connected with the output end of the first amplifying unit 20, for being put to described first
The voltage signal of the transmission of big unit 220 carries out shaping；
The invasion check system includes：
Microwave remote sensor 410, the voltage letter produced by frequency change that the human motion for detecting motor vehicle environment causes
Number；
Second amplifying unit 420, its input is connected with the output end of microwave remote sensor 410, for amplifying microwave sensing
The voltage signal produced by frequency change that the human motion that device 410 is detected causes；
Second shaping unit 430, its input is connected with the output end of the second amplifying unit 420, for described second
The voltage signal of the transmission of amplifying unit 420 carries out shaping；
The output end of the shaping unit 430 of first shaping unit 230 and second with the interruption of processor of single chip computer 110
The signal of the connection of triggering port, the first shaping unit 230 and the output of the second shaping unit 430 is used to wake up processor of single chip computer
A/D modular converters inside 110；
The output end of the amplifying unit 420 of first amplifying unit 220 and second simultaneously with processor of single chip computer 110
A/D conversion ports are connected, and after the A/D modular converters inside processor of single chip computer 110 are waken up, processor of single chip computer 110 leads to
Cross the analog signal that A/D conversion ports gather the first amplifying unit 220 and the second amplifying unit 420；
Trigger element 440 is additionally provided between the processor of single chip computer 110 and microwave remote sensor 410, at single-chip microcomputer
When reason device 110 judges that the pressure change signal of automotive interior exceedes the setting value inside processor of single chip computer 110, triggering microwave is passed
Sensor 410 works, and the frequency that the human motion of collection motor vehicle environment causes changes produced voltage signal.
Vehicle intrusion detecting system of the present utility model also includes the alarm unit 300 being connected with processor of single chip computer and passes
Defeated unit 500, when processor of single chip computer 110 meets with according to the signal determining automobile of in-car Measurement System of Air Pressure and invasion check system
During by outside invasion, alarm is sent by alarm unit 300, while sending information to user by transmission unit 500.
Baroceptor 210 uses Electret condenser microphone, Electret condenser microphone to be made up of electret film and backplane, and electret is thin
There is free charge on film, electret film can produce the vibration of CF when air pressure changes, and then produce friendship
The voltage signal of change, so that baroceptor 210 can gather the voltage signal produced by air pressure variations.
Microwave remote sensor 410 is mainly made up of microwave oscillator and microwave antenna, and wave agitator produces oscillating microwave letter
Launched by microwave antenna after number；The microwave launched by microwave antenna, will be absorbed or reflected when running into testee,
Microwave power is set to change.Reception antenna receives the microwave reflected by testee or by measured object, and it is turned
Change electric signal into.
As shown in Fig. 2 the first amplifying unit 220 includes signal amplification circuit and low-pass filter circuit；Baroceptor 210
Air pressure change signal InPut1 carried out with reference voltage V CC after resistor R11, capacitor C11 do a filtering process
Superposition, then via the first operational amplifier IC1A and by resistor R12, resistor R13, capacitor C12, capacitor
The multiplication factor adjustment circuit of C13, adjustable potentiometer Rw1 composition is amplified, and resistor R12 makees in multiplication factor adjustment circuit
Be negative-feedback, when because baroceptor individual difference and other factors cause to amplify at the standard conditions signal it is inconsistent when,
Can be finely adjusted by adjustable potentiometer Rw1, it is ensured that the uniformity of amplified signal；It is core with the second operational amplifier IC1B
Low-pass filter circuit, the signal amplified via the first operational amplifier IC1A is carried out into LPF so that first amplifies single
Voltage signal of the voltage signal of unit 220 in the frequency range for needed for；The output end of the second operational amplifier IC1B passes through respectively
Resistor R17, resistor R18 branch into two-way output signal, all the way output signal OutPut1 and processor of single chip computer 110
A/D conversion ports are connected, and another road output signal OutPut2 is connected with the first shaping unit 230 of next stage.
As shown in Figure 3, the first shaping unit 230 is by upper window comparator circuit and lower window comparator circuit realiration pair
First shaping unit 230 amplifies, filtered voltage signal carries out shaping.The output signal OutPut2 of the first amplifying unit 220
With the input signal InPut2 of the first shaping unit, upper window comparator circuit is by the 3rd operational amplifier IC1C, resistor
R21, resistor R22, resistor R23 compositions, reference voltage V CC is through the window voltage after resistor R21, resistor R22 partial pressures
VTHH flows into the 3rd operational amplifier IC1C and input signal InPut2 and is compared, the output letter of the 3rd operational amplifier IC1C
Number by obtaining a positive shaped waveforms OutPut3 after resistor R23；Same lower window comparator circuit is put by the 4th computing
Big device IC1D, resistor R24, resistor R25, resistor R26 compositions, reference voltage V CC is through resistor R24, resistor R25 point
Window voltage VTHL after pressure flows into four-operational amplifier IC1D and input signal InPut2 and is compared, the 4th operation amplifier
The output signal of device IC1D is by obtaining a negative sense shaped waveforms OutPut4 after resistor R26.
By the waveform after the amplification of the first amplifying unit 220 as shown in figure 5, being both the input signal of the first shaping unit
The waveform of InPut2, the air pressure change for being also the collection of processor of single chip computer 110 amplifies signal waveform；As InPut2 >=VTHH, then
Upper window comparator output signal OutPut3 is low level；Work as InPut2<VTHH, then go up window comparator output signal
OutPut3 is high level；As InPut2≤VTHL, then it is low level to descend window comparator output signal OutPut4；Work as InPut2
>VTHL, then it is high level to descend window comparator output signal OutPut4；Output signal OutPut3, output signal OutPut4
The change of waveform low and high level is transferred to processor of single chip computer 110, and produces interrupt signal to wake up processor of single chip computer 110,
Meanwhile, processor of single chip computer 110 adds up upper and lower window output signal for low level oscillogram is as shown in Figure 6.
The electricity of the second amplifying unit 420 and the first amplifying unit 220, the second shaping unit 430 and the first shaping unit 230
Road knot is enough identical, and only the appearance resistance of resistor, capacitor need to be adjusted；The two-way output signal of the second amplifying unit 420
Respectively OutPut1 ', OutPut2 ', the two-way output signal of the second shaping unit 430 are respectively OutPut3 ', OutPut4 '.
As shown in fig. 6, down trigger port PA01, PA02 of processor of single chip computer 110 respectively with the first shaping unit 230
Two-way output signal OutPut3, OutPut4 be connected, another down trigger port PA04, PA05 distinguish the second shaping unit
430 two-way output signal OutPut3 ', OutPut4 ' is connected；The A/D conversion ports PA03 of processor of single chip computer 110 and
The amplification output signal OutPut1 of one amplifying unit 220 is connected, and A/D conversion ports PA06 is put with the second amplifying unit 420
Big output signal OutPut1 ' is connected.
As shown in fig. 7, trigger element 440 for a microwave remote sensor 410 enable control unit, respectively by resistor R31,
R32, R33, triode Q31 compositions, the trigger signal InPut5 of processor of single chip computer 110 are input into through resistor R31, when triggering is believed
Triode Q31 is not turned on when number InPut5 is high level, so that it is the pulldown signal of R33 that output signal is OutPut5, namely it is low
Level, microwave remote sensor 410 does not work；When needing triggering microwave remote sensor 410 to work, InPut5 input signals are low electricity
It is flat, triode Q31 conductings, OutPut5 output signals are high level, so that microwave remote sensor 410 starts and searches around element immediately
Human motion causes microwave signal.
As shown in figure 8, the utility model additionally provides the implementation method of the vehicle intrusion detecting system, including following step
Suddenly：
S1, interior air pressure changes of vehicle detection：Baroceptor 210 gathers the pressure change signal of automotive interior, by first
Processor of single chip computer 110 is sent to after amplifying unit 220, the first shaping unit 230；
S2, air pressure change interrupt signal judge：If processor of single chip computer 110 receives the transmission of the first shaping unit 230
Interrupt signal ST100, then perform step S3；Otherwise, step S1 is continued executing with；
S3, air pressure change signal acquisition and judgement：Interrupt signal ST100 by processor of single chip computer 110 from park mode or
Person other mode wakeups, the A/D modular converters inside processor of single chip computer 110 gather the output signal of the first amplifying unit 210
ST101；Meanwhile, the upper and lower window comparator output signal of accumulative first shaping unit 230 of processor of single chip computer 110 is low level
Time ST102, it is unchanged more than 1 second when shaping unit output waveform is detected, then perform step S4；Otherwise, continue executing with
S3；
With reference to the waveform of Fig. 5 and Fig. 6, time of t1 to the t2 for being marked in record figure respectively is dt1, the time of t2 to t3 to be
Dt2, the time dt3 of t3 to t4, the time of waveform time-out detection time t4 to t5 are timeout, i.e.,：
Dt1=t2-t1；
Dt2=t3-t2；
Dt3=t4-t3；
Timeout=t5-t4；
S4, automobile door opening condition judgment：When the timeout times were more than 1 second, judge dt1, dt2, dt3 whether all respectively
Meet the reference range tested under the conditions of varying environment, and combine since the t1 times to processor of single chip computer in the t5 time periods
A/D conversion ports collection signal ST101 be analyzed, checking this period section in data with the presence or absence of burr, crest value,
Whether valley value is in the amplitude range for allowing, and the sensitivity voluntarily selected according to user automatically adjusts reference value, final true
Determine whether air pressure change is air pressure change condition that automobile door opening causes：If output signal ST101 meets automobile door opening caused
Air pressure change condition, perform step S5；Otherwise, step S3 is continued executing with；
S5, invasion check system start：The normality of microwave remote sensor 410 is holding state, only when baroceptor 210
After air pressure change signal meets the air pressure change condition that automobile door opening causes, processor of single chip computer 110 is touched by trigger element 440
Hair microwave remote sensor 410 start, start gather motor vehicle environment human motion cause frequency change produced by voltage signal,
By being sent to processor of single chip computer 110 after the second amplifying unit 420, the second shaping unit 430；
S6, microwave interrupt signal judge：Processor of single chip computer 110 receives the interruption letter of the transmission of the second shaping unit 430
Number ST110, then perform step S8；Otherwise, step S6 is continued executing with；
S7, microwave signal collection and judgement：The interrupt signal ST110 that second shaping unit 430 sends processes single-chip microcomputer
Device 110 is processed from other mode wakeups, priority treatment the second amplifying unit 420, the signal of the second shaping unit 430, single-chip microcomputer
A/D modular converters inside device 110 start to gather the output signal ST111 of the second amplifying unit 430；Meanwhile, single-chip microcomputer treatment
The accumulative upper and lower window comparator of second shaping unit 430 of device 110 is output as the time ST112 of low level signal, if detecting the
The output waveform of two shaping unit 430 is unchanged more than 1 second, then perform step S8；Otherwise, S7 is continued executing with；
S8, human motion condition judgment：Second amplifying unit 420 of the processor of single chip computer 110 to collection in time ST112
Output signal ST111 whether meet human motion condition and judged：If output signal ST111 meets the bar of human motion
Part, then showing that the air pressure change amount of current automotive interior is opened the door by human body causes, i.e., automobile is subjected to outside invasion, then alarm unit
300 can make corresponding warning by sound or wait, meanwhile, transmission unit 500 leads to the warning message by wireless communication mode
Know that user's automobile is subjected to outside invasion, user takes counter-measure in time after receiving the invasion information；If output signal ST111
The condition of human motion is unsatisfactory for, then shows that automobile is not subjected to outside invasion, without sending alarm, continue to detect.
When whether the output signal ST111 of 110 pairs of the second amplifying units 420 of processor of single chip computer meets human motion condition
After being judged, microwave remote sensor 410 turns again to holding state, break-off, until the unit 440 that is triggered is triggered again.
Detecting system of the present utility model and method are sent out the air pressure variations of automotive interior by processor of single chip computer
After raw response, then detect whether the air pressure variations carried out in verification automobile are that artificial enabling is caused by microwave remote sensor
, it is to avoid such as strong wind, set off firecrackers, thunder, sonic boom environmental factor causes automobile inner air pressure to change the wrong report for causing
It is alert.Method of the present utility model can be used for article anti-theft in Automobile, in vehicle anti-theft, while can be used for other with one
Determine the article anti-theft in sealed environment space.Because the detection method is less demanding to installation site, as long as the air in space
Change be able to can be just accurately detected by the device, the intrusion detection method, therefore, user can anywhere easily
Use the device.
Above-described embodiment is only preferred embodiment of the present utility model, not to the limitation of the utility model protection domain,
In every case design principle of the present utility model, and the change for carrying out non-creativeness work on this basis and making are used, all should
Belong within protection domain of the present utility model.
Claims (5)
1. a kind of vapour-pressure type based on OBD interfaces senses vehicle intrusion detection means, including is connected with vehicle-mounted OBD interfaces (600)
Scm managing system, the in-car Measurement System of Air Pressure being connected with scm managing system, alarm unit (300)；
The scm managing system includes processor of single chip computer (110), and is connected to processor of single chip computer (110) periphery
Clock oscillation unit (120), power supply unit (130), reset unit (140)；
The in-car Measurement System of Air Pressure includes：
Baroceptor (210), for detecting the pressure change signal of automotive interior, and is converted to voltage by pressure change signal
Signal；
First amplifying unit (220), its input is connected with the output end of baroceptor (210), for amplifying air pressure sensing
The voltage signal of the interior pressure change that device (210) is detected；
First shaping unit (230), its input is connected with the output end of the first amplifying unit (220), for described first
The voltage signal of amplifying unit (220) transmission carries out shaping；
It is characterized in that：Also include invasion check system, the invasion check system includes：
Microwave remote sensor (410), the voltage signal produced by frequency change that the human motion for detecting motor vehicle environment causes；
Second amplifying unit (420), its input is connected with the output end of microwave remote sensor (410), for amplifying microwave sensing
The voltage signal produced by frequency change that the human motion that device (410) is detected causes；
Second shaping unit (430), its input is connected with the output end of the second amplifying unit (420), for described second
The voltage signal of amplifying unit (420) transmission carries out shaping；
The output end of first shaping unit (230) and the second shaping unit (430) with processor of single chip computer (110) in
The signal of the connection of disconnected triggering port, the first shaping unit (230) and the second shaping unit (430) output is used to wake up at single-chip microcomputer
The internal A/D modular converters of reason device (110)；
The output end of first amplifying unit (220) and the second amplifying unit (420) simultaneously with processor of single chip computer (110)
The connection of A/D conversion ports, after the internal A/D modular converters of processor of single chip computer (110) are waken up, processor of single chip computer
(110) analog signal of the first amplifying unit (220) or the second amplifying unit (420) is gathered by A/D conversion ports；
Trigger element (440) is additionally provided between the processor of single chip computer (110) and microwave remote sensor (410), works as single-chip microcomputer
When processor (110) judges that the pressure change signal of automotive interior exceedes processor of single chip computer (110) internal setting value, triggering
Microwave remote sensor (410) works, and the frequency that the human motion of collection motor vehicle environment causes changes produced voltage signal；
The vehicle-mounted OBD interfaces (600) are connected by power transfer module (700) with processor of single chip computer (110), for list
Piece machine processor (110) and the unit being connected with processor of single chip computer (110) provide stable operating voltage.
2. a kind of vapour-pressure type based on OBD interfaces according to claim 1 senses vehicle intrusion detection means, and its feature exists
In also including the transmission unit (500) being connected with processor of single chip computer, when automobile is subjected to outside invasion, for being sent out to user
Send warning information.
3. a kind of vapour-pressure type based on OBD interfaces according to claim 1 senses vehicle intrusion detection means, and its feature exists
In the baroceptor (210) uses Electret condenser microphone.
4. a kind of vapour-pressure type based on OBD interfaces according to claim 1 senses vehicle intrusion detection means, and its feature exists
In first amplifying unit (220) is identical with the circuit structure of the second amplifying unit (420), including the signal being sequentially connected
Amplifying circuit and low-pass filter circuit, the signal amplification circuit is by the first operational amplifier (IC1A) and its some electricity of periphery
Resistance device, capacitor, adjustable potentiometer composition；The low-pass filter circuit by the second operational amplifier (IC1B) filter circuit and its
Periphery some resistors, capacitor bank into；And the output end of second operational amplifier (IC1B) passes through two electricity respectively
Resistance device branches into two-way output signal, all the way the A/D conversion ports of output signal supply processor of single chip computer (110), Ling Yilu
Output signal supplies the first shaping unit (230)/second shaping unit (430).
5. a kind of vapour-pressure type based on OBD interfaces according to claim 1 senses vehicle intrusion detection means, and its feature exists
In first shaping unit (230) is identical with the circuit structure of the second shaping unit (430), including upper window comparator
Circuit and lower window comparator circuit, the upper window comparator circuit and lower window comparator circuit are put by the 3rd computing respectively
Some resistors of big device (IC1C) and four-operational amplifier (IC1D) and its periphery, capacitor bank into；First amplifying unit
(220)/second the output signal of amplifying unit (420) via after upper window comparator circuit, lower window circuit respectively to monolithic
Machine processor (110) provides positive shaped waveforms and negative sense shaped waveforms.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109017743A (en) * | 2018-09-12 | 2018-12-18 | 宁波捷锐汽车电子有限公司 | The air pressure acquisition devices and air pressure acquisition system of car brake and door control system |
| CN110077362A (en) * | 2019-05-07 | 2019-08-02 | 广东工业大学 | A kind of safety device |
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2016
- 2016-12-27 CN CN201621448196.1U patent/CN206306997U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109017743A (en) * | 2018-09-12 | 2018-12-18 | 宁波捷锐汽车电子有限公司 | The air pressure acquisition devices and air pressure acquisition system of car brake and door control system |
| CN109017743B (en) * | 2018-09-12 | 2024-02-27 | 宁波捷锐汽车电子有限公司 | Air pressure acquisition device and air pressure acquisition system of passenger car brake and door control system |
| CN110077362A (en) * | 2019-05-07 | 2019-08-02 | 广东工业大学 | A kind of safety device |
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