CN108756397A - A kind of vehicle impact detection system for parking lot - Google Patents
A kind of vehicle impact detection system for parking lot Download PDFInfo
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- CN108756397A CN108756397A CN201810421531.6A CN201810421531A CN108756397A CN 108756397 A CN108756397 A CN 108756397A CN 201810421531 A CN201810421531 A CN 201810421531A CN 108756397 A CN108756397 A CN 108756397A
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- parking lot
- detection system
- impact detection
- vehicle impact
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H6/00—Buildings for parking cars, rolling-stock, aircraft, vessels or like vehicles, e.g. garages
- E04H6/42—Devices or arrangements peculiar to garages, not covered elsewhere, e.g. securing devices, safety devices, monitoring and operating schemes; centering devices
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Traffic Control Systems (AREA)
- Emergency Alarm Devices (AREA)
Abstract
The invention discloses a kind of vehicle impact detection systems for parking lot, including DSP main control modules, power module A, geomagnetic sensor module, sound acquisition module and alarm module are separately connected on DSP main control modules, sound acquisition module is also connected with sound transducer module, sensor assembly connects power module B, geomagnetic sensor module, sound acquisition module and alarm module connection power module C.Geomagnetic sensor and sound transducer are combined together by the present invention, by to the signal collected processing operation of two kinds of sensors, it can not only quickly and efficiently detect the collision accident that parking stall occurs, additionally it is possible to send out alarm signal in time, staff is reminded to take corresponding counter-measure.
Description
Technical field
The invention belongs to vehicle collision detection technique fields, are related to a kind of vehicle impact detection system for parking lot.
Background technology
At present in vehicle collision detection field there are many detection method, it is broadly divided into based on magnetic frequency signal, is believed based on wave spectrum
Number and the vehicle detection apparatus based on vision signal, various detection devices are using including the inspections such as camera, ultrasonic wave or microwave
Vehicle crash event is surveyed, the telecommunication flow information of macroscopic view is mainly handled, that there are discriminations is not high for this indirect detection technique, prolongs
The features such as time is long late so that be difficult to be quickly identified processing after the event that collides.
2007, Japanese bamboo original intelligence and Yezhong Ren Ren proposed a kind of vehicle impact detection system, and multiple pressure are passed
Sensor is positioned over the inner space of the left and right door of vehicle, corrects the variable of pressure by calculating to determine the hair of object collision
It is raw.
At home, Wang Zhaoqi, Wang Zhiqiang etc. have been devoted to the Collision Detection Algorithm based on object space, the algorithm
It is multiple technologies applications such as hierarchical representation, geometric reasoning, algebraic normal form, space division, analytic method and optimal methods
In collision detection.Wei Yingmei of the National University of Defense Technology et al. discusses fixed direction hull (fixed directions
Hulls, abbreviation FDH) method that carries out collision detection as bounding box, demonstrate that it is suitable for the accurate collisions in complex environment
Detection, the collision detection being particularly suitable in soft body object environment, this method can be used for virtual teach-in.Model is clear bright et al. to be adopted
The collision detection algorithm based on image proposed with Baciu et al. carries out automatic convex decomposition to body surface, after by convex decompositions knot
Fruit rationalization is at level binary tree structure, and uses the rendering accelerating technology based on triangle strip, effectively increases algorithm
Efficiency, and collision detection between arbitrary shaped body can be handled.
But in current vehicle collision detection field, research is the improvement of vehicle itself mostly, and stops in large size
Due to the collision accident that car owner's maloperation occurs in, can not simultaneously timely processing be found by staff in time, caused certain
Economic loss.
Invention content
The object of the present invention is to provide a kind of vehicle impact detection systems for parking lot, by geomagnetic sensor and sound
Sensor is combined together, by the signal collected processing operation of two kinds of sensors, can not only quickly and efficiently detect
The collision accident that parking stall occurs, additionally it is possible to send out alarm signal in time, staff is reminded to take corresponding counter-measure.
The technical solution adopted in the present invention is a kind of vehicle impact detection system for parking lot, including DSP master controls
Module is separately connected power module A, geomagnetic sensor module, sound acquisition module and alarm module, sound on DSP main control modules
Sound acquisition module is also connected with sound transducer module, and sensor assembly connects power module B, and geomagnetic sensor module, sound are adopted
Collect module and alarm module connection power module C.
The features of the present invention also characterized in that
Geomagnetic sensor module uses the HMC5883L earth magnetism sensing chips of flush type.
Sound transducer module uses audio processing chip LM386.
Sound acquisition module selects TLV320AIC23 chips.
DSP main control modules use 32 float-point DSP processor TMS320F28335 of TMS320C28x series.
The voltage conversion chip used in power module C selects the AMS1117-3.3 of SOT-89.
The voltage conversion chip used in power module B selects CJ1117M3-5.
Power module A uses wide scope voltage stabilizing chip TPS767D318 power drives chips.
Beneficial effects of the present invention are as follows：
1. the present invention improves the working efficiency of system with the rapidity of DSP main control modules processing digital signal；
2. due to geomagnetic sensor module nonrecognition nonferromagnetic object, and by geomagnetic sensor module and sound sensor
Device module synthesis uses, and can improve the accuracy rate that vehicle impact detection system in the present invention differentiates collision accident；
3. system quickly can send alarm signal after detecting collision accident to parking lot control room, work people is notified
It goes to handle before member, improves the working efficiency of parking lot personnel.
Description of the drawings
Fig. 1 is a kind of structural representation of vehicle impact detection system for parking lot of the invention；
Fig. 2 is sound acquisition module, sound transducer in a kind of vehicle impact detection system for parking lot of the invention
Module and geomagnetic sensor module mounting location structural schematic diagram.
In figure, 1.DSP main control modules, 2. power module A, 3. geomagnetic sensor modules, 4. sound acquisition modules, 5. alarms
Module, 6. source module B, 7. power module C, 8. sound transducer modules, 9. parking stalls, 10. crash bars.
Specific implementation mode
The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
A kind of vehicle impact detection system for parking lot of the invention, as shown in Figure 1, including DSP main control modules 1, DSP
Power module A2, geomagnetic sensor module 3, sound acquisition module 4 and alarm module 5 are separately connected on main control module 1, sound is adopted
Collection module 4 is also connected with sound transducer module 8, and sensor assembly 5 connects power module B6, and geomagnetic sensor module 3, sound are adopted
Collect module and alarm module 5 connects power module C7.
As shown in Fig. 2, sound acquisition module 4 and sound transducer module 8 are mounted on the crash bar 10 at parking stall rear,
Geomagnetic sensor module 3 is embedded in immediately below parking stall 9,
For geomagnetic sensor module 3 using the HMC5883L earth magnetism sensing chips of flush type, Honeywell HMC58831L is one
The surface-pasted highly integrated module of kind, and the weak magnetic sensor chip with digital interface.HMC58831L is each using Honeywell
Anisotropy magnetic resistance (AMR) technology, including state-of-the-art high-resolution HMC118X series magnetoresistive sensors, and it is attached to Honeywell
The integrated circuit of patent include amplifier, autodegauss driver, deviation calibration, can make compass precision controlling 1 °~2 ° 12
Position analog-digital converter, easy I2C serial bus interface.These anisotropy sensors have axial highly sensitive and linear
The Magnetic Sensor of high-precision feature, Honeywell is that sensitivity highest and reliability are best in downfield sensor industry
Sensor.HMC5883L institutes application field has mobile phone, laptop, consumer electronics, auto navigation and personal navigation system.
Honeywell HMC58831L sensor have the advantage that：
(1) three axis magnetoresistive sensor and ASIC be all encapsulated in 3.0*3.0*0.9mmLCC it is surface-mounted in；
(2) 12-bit ADC and low interference AMR sensor, can realize 5 milligauss resolution ratio in the magnetic field of ± 8 Gausses；
(3) built-in self-checking function；
(4) operating on low voltage (2.16-3.6V) and super low-power consumption (100 μ A)；
(5) corresponding software is supported with algorithm；
(6) maximum transmitted frequency is up to 160MHZ；
(7) compass heading precision can be allowed to be accurate to 1 °~2 °；
(8) it is suitable for battery powered application scenario.
Sound transducer module 8 uses audio processing chip LM386, is able to detect that the presence or absence of ambient sound and judgement sound
The size of loudness of a sound degree, it has the characteristics that：
(1) 200 times of amplifications can be carried out to collected audio signal；
(2) sensitivity is adjustable；
(3) signal output instruction；
(4) detection frequency range is：30HZ-20KHZ.
Sound acquisition module 4 selects TLV320AIC23 chips.TLV320AIC23PW (hereinafter referred to as AIC23) is that TI is released
A high performance stereo audio Codec chips, built-in earphone output amplifier supports two kinds of inputs of MIC and LINE IN
Mode (alternative), and all there is programmable-gain to adjust to outputting and inputting.The analog-to-digital conversion (ADCs) and digital-to-analogue of AIC23 turns
It changes (DACs) component height and is integrated in chip interior, use advanced Sigma-delta oversampling techniques, can be arrived in 8K
The output signal-to-noise ratio of the sampling of offer 16bit, 20bit, 24bit and 32bit in the frequency range of 96K, ADC and DAC respectively can
To reach 90dB and 100dB.At the same time, AIC23 also has very low energy consumption, and power is only 23mW, power saving under playback mode
It is even more to be less than 15uW under pattern.
Alarm module 5 is using the TGSG-07 acousto-optics developed for work characteristics and the architectural characteristic of large scale hoisting machinery
Alarm is applied in the vehicle collision detects alarm system, is started small sound, speed, is prompted using multiple voice, is made
On-site personnel is easier to differentiate, and further improves the efficiency that staff in parking lot handles collision accident.
DSP main control modules 1 are using serial 32 float-point DSP processors of a TI high-performance TMS320C28x
TMS320F28335.For TMS320F28335 types digital signal processor compared with previous fixed DSP, the precision of the device is high,
At low cost, small power consumption, performance is high, and peripheral hardware integrated level is high, and data and program amount of storage are big, and A/D conversions are more accurately quick etc..
TMS320F28335 has the high speed processing ability of 150MHz, has 32 floating point processing units, 6 DMA channels
It supports ADC, McBSP and EMIF, there is the PWM on up to 18 tunnels to export, wherein there is the PWM that 6 tunnels are the distinctive higher precisions of TI to export
(HRPWM), 12 16 channel ADC.Have benefited from its FPU Float Point Unit, user can quickly write control algolithm without handling
Excessive time and efforts is expended in decimal operation, compared with former generation DSP, average behavior improves 50%, and is controlled with fixed point C28x
Device software compatibility processed shortens the development cycle to simplify software development, reduces development cost.
A kind of vehicle impact detection system for parking lot of the invention uses 24V power supply power supplies, geomagnetic sensor module
3, sound acquisition module 4 and alarm module 5 use 3.3V power supplys, the voltage conversion chip used in power module C7 to select small envelope
Fill the AMS1117-3.3 of SOT-89；
Sound transducer module 8 uses 5V power supplys, the voltage conversion chip used in power module B6 to select CJ1117M3-
5。
Power module A2 uses wide scope voltage stabilizing chip TPS767D318 power drives chips, is supplied to DSP main control modules 1
Electricity.
A kind of operation principle of vehicle impact detection system for parking lot of the invention is to enter the parking when there is vehicle
When position, earth magnetic field is caused to change, geomagnetic sensor module 3 turns the Geomagnetic signal detected by A/D conversion modules
It changes and is sent to DSP main control modules 1 and is handled；Sound transducer module 8 acquires various voice signals, sound transducer module 8
The electric signal of output is passed to the input end of analog signal of sound acquisition module 4, is then fed into after amplifying circuit amplifies
DSP main control modules 1 further process.DSP main control modules 1 handle the Geomagnetism Information and sound on collected parking stall in real time
Information judges whether there is the generation of vehicle collision accident.Alarm module 5 communicates with parking lot management and control center, once DSP master controls
The confirmation of module 1 crashes, and drives alarm module 5 to send out warning message immediately, staff is notified to come to handle.
The synthetically 8 collected signal of magnetic sensor module 3 and sound transducer module of DSP main control modules 1, to determine whether vehicle occurs
Collision.When parking stall geomagnetic sensor module 3 does not collect GEOMAGNETIC CHANGE signal, and sound transducer module 8 collects
Signal, DSP main control modules 1 are then disregarded；Local magnetic sensor module 3 collects signal and determines that other vehicles enter, sound
Sensor assembly 8 does not collect collision alarm, and DSP main control modules 1 are also disregarded.By DSP main control modules 1 and sound sensor
The processing of 8 collected signal synthesis of device module, can improve the accuracy rate of system detectio vehicle crash event.
Claims (8)
1. a kind of vehicle impact detection system for parking lot, it is characterised in that：Including DSP main control modules (1), DSP master controls
Power module A (2), geomagnetic sensor module (3), sound acquisition module (4) and alarm module (5) are separately connected in module (1),
Sound acquisition module (4) is also connected with sound transducer module (8), and sensor assembly (5) connects power module B (6), earth magnetism sensing
Device module (3), sound acquisition module (4) and alarm module (5) connection power module C (7).
2. a kind of vehicle impact detection system for parking lot according to claim 1, it is characterised in that：The earth magnetism
Sensor assembly (3) uses the HMC5883L earth magnetism sensing chips of flush type.
3. a kind of vehicle impact detection system for parking lot according to claim 1, it is characterised in that：The sound
Sensor assembly (8) uses audio processing chip LM386.
4. a kind of vehicle impact detection system for parking lot according to claim 1, it is characterised in that：The sound
Acquisition module (4) selects TLV320AIC23 chips.
5. a kind of vehicle impact detection system for parking lot according to claim 1, it is characterised in that：The DSP
Main control module (1) uses 32 float-point DSP processor TMS320F28335 of TMS320C28x series.
6. a kind of vehicle impact detection system for parking lot according to claim 1, it is characterised in that：The power supply
The voltage conversion chip used in module C (7) selects the AMS1117-3.3 of SOT-89.
7. a kind of vehicle impact detection system for parking lot according to claim 1, it is characterised in that：The power supply
The voltage conversion chip used in module B (6) selects CJ1117M3-5.
8. a kind of vehicle impact detection system for parking lot according to claim 1, it is characterised in that：The power supply
Modules A (2) uses wide scope voltage stabilizing chip TPS767D318 power drives chips.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810421531.6A CN108756397A (en) | 2018-05-04 | 2018-05-04 | A kind of vehicle impact detection system for parking lot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810421531.6A CN108756397A (en) | 2018-05-04 | 2018-05-04 | A kind of vehicle impact detection system for parking lot |
Publications (1)
| Publication Number | Publication Date |
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| CN108756397A true CN108756397A (en) | 2018-11-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201810421531.6A Pending CN108756397A (en) | 2018-05-04 | 2018-05-04 | A kind of vehicle impact detection system for parking lot |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102568153A (en) * | 2010-12-20 | 2012-07-11 | 淄博高新区联创科技服务中心 | Vehicle collision detection device |
| CN207063654U (en) * | 2017-08-21 | 2018-03-02 | 杭州艾佳智能科技有限公司 | A kind of intelligently lock based on wireless geomagnetism and ultrasound examination |
-
2018
- 2018-05-04 CN CN201810421531.6A patent/CN108756397A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102568153A (en) * | 2010-12-20 | 2012-07-11 | 淄博高新区联创科技服务中心 | Vehicle collision detection device |
| CN207063654U (en) * | 2017-08-21 | 2018-03-02 | 杭州艾佳智能科技有限公司 | A kind of intelligently lock based on wireless geomagnetism and ultrasound examination |
Non-Patent Citations (1)
| Title |
|---|
| 辜钰婷等: "《基于RS-485总线磁阻停车位检测系统》", 《电子制作》 * |
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Application publication date: 20181106 |
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