CN207558194U - A kind of stall testing apparatus based on multisensor combined detection suitable for automatic parking lock - Google Patents
A kind of stall testing apparatus based on multisensor combined detection suitable for automatic parking lock Download PDFInfo
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Abstract
The utility model discloses a kind of stall testing apparatus based on multisensor combined detection suitable for automatic parking lock, including geomagnetic sensor, ultrasonic sensor and processor, it is characterised in that：Described device further includes the optical sensor being electrically connected with processor.The optical sensor is connected to processor by SPI, I2C digital interface or analog level signal line；Geomagnetic sensor and ultrasonic sensor are connected to processor by SPI, I2C digital interface.Parking stall lock controller is also electrically connected on the processor.The utility model combine from berth lock stopping device, earth magnetism, illuminance, the aspect of ultrasonic wave four effective information, compared to the conventional detection method based on pure earth magnetism, the associated detecting method based on earth magnetism and illuminance, united detection method based on earth magnetism and ultrasonic wave etc., to the producing level higher of information, realize the mutual supplement with each other's advantages of various sensors, therefore reliability higher, power consumption are lower.
Description
Technical field
The utility model is related to a kind of stall testing apparatus.
Background technology
Automatic parking lock is a kind of on parking stall, has been capable of detecting whether vehicle parking, and sail out of vehicle in vehicle
Position after, timely automated locking, prevent other vehicles it is unauthorized stop into arresting gear.This kind of berth lock is shared on parking stall, is stopped
It is essential in the application of the realizations such as vehicle automatic charging, charging pile parking stall management parking automatic management.It is as shown below, it is common
Parking stall lock construction be broadly divided into lock body and stopping device.Wherein, lock body is fixed on ground, and stopping device can rise and fall.When
After stopping device rises, vehicle can not berth, and after falling, vehicle can berth.
Technically, two big key factors decide the standard of the practical value of this kind of automatic parking lock, i.e. parking space state detection
True rate and power consumption.If having car state is mistaken for without car state, when there is vehicle to park, arresting gear has what is surprisingly risen
May, particularly when vehicle be in into and out of parking stall movement during, arresting gear have with vehicle chassis architecture part occur hook,
The danger scratched causes vehicle or lock body itself to damage.Without car state is mistaken for having car state, then vehicle may be caused to sail
It from rear, still will not lock, and then parking stall is caused to be parked by unauthorized other vehicles occupancy.While accuracy rate is ensured,
Power consumption must be low as possible.Because berth lock, generally using battery powered, power consumption height means that battery life is short and maintenance period is short.
At present suitable for berth lock common detection method be earth magnetism+ultrasonic combined detection method, geomagnetic sensor
The motion event of vehicle is monitored by lasting detection earth's magnetic field.This is because the ferromagnetic component of automobile body, such as cast
Iron engine, gearbox, chassis structure, irony wheel hub etc. can generate disturbance to earth's magnetic field.When vehicles while passing parking stall, earth magnetism
Sensor can measure this disturbance, and then determine currently whether have movable vehicle.Processor is obtained from geomagnetic sensor
To after this disturbing signal, by the way that ultrasonic sensor is controlled to emit acoustic detection signal, and the reflective echo of underbody is received
Whether signal is current with the presence of vehicle to judge.
More than earth magnetism+ultrasonic combined detect combines the low-power consumption advantage of earth magnetism passive detection and ultrasonic wave active probe
High reliability advantage, but there is also drawbacks simultaneously, are mainly manifested in：
（1）Geomagnetic sensor is easily interfered, and actual power loss is caused to significantly increase
Geomagnetic noise includes disturbance of magnetic field caused by adjacent parking stall vehicle comes in and goes out, neighbouring track vehicle passes through caused magnetic field
Disturbance of magnetic field etc. caused by the strong-electromagnetic fields of generations such as disturbance, neighbouring substation or air-conditioner set.These interference and this parking stall
Vehicle come in and go out caused by disturbance of magnetic field without essential distinction, therefore processor can be caused to be mistakenly considered to may currently exist vehicle discrepancy
Event, and then ultrasonic detector is caused frequently to be activated by unexpected, the larger ultrasonic listening process of power consumption is performed, is eventually led to
Power consumption significantly increases.In the worst cases, in the presence of this kind of magnetic interference continues, ultrasonic listening will be in continuous firing shape
State.Operating current will be from hundred microamperes of magnitudes under normal condition（uA）Surge to ten milliamperes of magnitudes（mA）, increase by 1 ~ 2 quantity
Grade, causes battery capacity to exhaust rapidly.
（2）Ultrasonic wave is easily blocked or is absorbed by sundries such as ponding, fallen leaves, causes result of detection inaccurate
Ultrasonic wave belongs to mechanical wave, and when being propagated with air, scraps of paper, fallen leaves, ponding on propagation path etc. can
Strong reflection, absorption are generated to acoustic wave energy, are allowed to be difficult to penetrate.Since the installation site of berth lock is ground, surpass
Sound wave there is a possibility that be blocked or absorbed by above-mentioned barrier larger, lead to the testing result of mistake.For example, there is vehicle to stop
When putting because fallen leaves, environmental sanitation flushing tool water spray cover ultrasonic sensor, cause ultrasonic wave can not emit or echo without
Method receives, so as to export the error result of no vehicle.Common ultrasonic detector installation method is mounted in detecting object just
To case surface, to reduce unnecessary attenuation of the sound wave during transmitting-receiving.For berth lock, it is vehicle bottom to be detected object
Disk, therefore conventional installation methods are mounted in the cover top portion on parking stall.This installation method is when surface is without ponding, Neng Gouzheng
Often work.But when surface there are ponding, fallen leaves when barriers when, the transmitting of ultrasonic wave and receive sharp-decay or complete
It blocks, detecting function is caused to fail, even if there is vehicle to park, also can be determined as no vehicle due to detection is less than back wave.
（3）There are short range blind area, too low vehicle chassis to be in blind area, can not detect for ultrasonic sensor
The short range blind area of ultrasonic sensor be due to ultrasonic transducer driving and aftershock will holding time and lead
It causes.During driving with aftershock, by the coupled interference of radiating circuit and transmitting sound wave, receiving unit often can not be to faint
Echo-signal detected.Driving and aftershock time usually always meet lasting more than 0.8ms together, when vehicle chassis is relatively low, return
Wave signal may arrive at receiving terminal before aftershock terminates, and lead to not detect so as to be submerged.
Utility model content
The purpose of this utility model is to provide a kind of vehicle based on multisensor combined detection suitable for automatic parking lock
Level detecting apparatus.
To achieve these goals, using following technical scheme：
A kind of stall testing apparatus based on multisensor combined detection suitable for automatic parking lock is sensed including earth magnetism
Device, ultrasonic sensor and processor, it is characterised in that：Described device further includes the optical sensor being electrically connected with processor.
The optical sensor is connected to processor by SPI, I2C digital interface or analog level signal line；Earth magnetism
Sensor and ultrasonic sensor are connected to processor by SPI, I2C digital interface.
Parking stall lock controller is also electrically connected on the processor.
The processor is connected to parking stall by the digital level interface of SPI, I2C, UART digital interface or switching value
Lock controller.
The geomagnetic sensor is 1 axis magnetoresistive sensor, 2 axis magnetoresistive sensors, 3 axis magnetoresistive sensors, Digital Magnetic Compass
Or 6 axle sensors, 9 axle sensors with magnetic compass function.
The ultrasonic sensor includes ultrasonic wave driving and signal processing circuit, ultrasonic wave driving and signal processing circuit
It is connect by signal line with booster circuit, booster circuit is connect by signal line with ultrasonic transmitter, and ultrasonic wave receives
Device is driven with ultrasonic wave by signal line and is connect with signal processing circuit.
After parking stall lock controller receives lock signal, geomagnetic sensor, ultrasonic sensor and optical sensor stop
Work, until parking stall lock controller receives unlocking signal.
Described device further includes berth lock, and wherein ultrasonic detector is located at berth lock shell side, in ultrasonic listening
There are one reflectings surface for device right opposite tool.
Reflecting surface is fixed on the shell of berth lock or integrally casts pressing formation by shell.
Reflecting surface is set on the stopping device of berth lock or integrally casts pressing formation by stopping device.
Reflecting surface and horizontal plane are into 45 degree of angles.
The utility model combine from berth lock stopping device, earth magnetism, illuminance, the aspect of ultrasonic wave four effective letter
Breath, compared to the conventional detection method based on pure earth magnetism, the associated detecting method based on earth magnetism and illuminance, based on earth magnetism with
United detection method of ultrasonic wave etc. to the producing level higher of information, realizes the mutual supplement with each other's advantages of various sensors, therefore
Reliability higher, power consumption are lower.
Description of the drawings
Fig. 1 is the structure diagram of embodiment；
Fig. 2 forms schematic diagram for ultrasonic sensor.
Specific embodiment
In the following with reference to the drawings and specific embodiments to being described further in this practical information.
As shown in Figure 1, the device should at least include illuminance sensor, geomagnetic sensor, ultrasonic sensor, processing
Device, and parking stall lock controller can be as a part for device, it can not also be as a part for device.Illuminance sensor leads to
It crosses digital interface or analog level signal line is connected to processor；Geomagnetic sensor, ultrasonic sensor each by SPI,
The digital interfaces such as I2C are connected to processor；Parking stall lock controller passes through the digital interfaces such as SPI, I2C, UART or switching value
Digital level interface is connected to processor.
Processor is responsible for acquiring, be handled from illuminance sensor, geomagnetic sensor, ultrasonic sensor and berth lock
The input of controller, and the judgement of final parking space state is carried out, and judgement result is transferred to illuminance sensor.Processor
MCU, DSP of low-power consumption etc., such as ST may be used（STMicw Electronics）STM08, STM32 series, TI（Texas Instrument）'s
CC2530, MSP430 series, MSP432 series etc..
Parking stall lock controller is used to implement the control to berth lock, rise including stopping device and falls, and to place
Manage device feedback stopping device state, including current stopping device state and block whether successfully rise etc. information.
The effect of illuminance sensor is that the illuminance of environment is converted into electric signal, and output can be analog signal
Or the digital interface signal of the forms such as I2C, SPI.In realization, common photo resistance or dedicated illumination may be used
Spend sensor.For example, TI（Texas Instrument）OPT3006 OPT3002 OPT3001, Murata LT-1PA01, Silicon
The Si1153 of Labs Si1133, OSRAM SFH3716 SFH5711 SFH3711 SFH3710 SFH3410 etc..
The effect of magnetic field sensor is that magnetic field intensity is converted to electric signal.In realization, 1 axis, 2 axis, 3 axis may be used
Magnetoresistive sensor, Digital Magnetic Compass or 6 axle sensors with magnetic compass function, 9 axle sensors etc..Such as NXP（Grace intelligence
Pu）MAG3110 FXOS8700CQ, ST（STMicw Electronics）IS3MDL LSM303AGR LSM303AH LSM303C
LSM303D LSM303DLHC etc..
The effect of ultrasonic sensor is transmitting ultrasonic wave, and receives the back wave from vehicle chassis, and will reflection
Wave number evidence is supplied to processor.
The composition of ultrasonic sensor is as shown in Figure 2：
Ultrasonic wave driving is connect with signal processing circuit by signal line with booster circuit, and booster circuit passes through signal wire
Road is connect with ultrasonic transmitter, and ultrasonic receiver is driven with ultrasonic wave by signal line and connect with signal processing circuit.
Wherein, ultrasonic wave driving and the effect of signal processing circuit are to generate ultrasonic wave drive signal, and handle ultrasound
Wave receives signal, and docking collects mail number processing carried out including being filtered, amplifying to signal, detection, taking envelope, sampling etc..
Ultrasonic wave drives and signal processing circuit is also realized to export to host computer by digital interfaces such as SPI or I2C and be surpassed
Acoustic detection data etc..The effect of booster circuit is the ultrasonic wave drive signal by ultrasonic wave driving and signal processing circuit output
Amplification forms the ultrasound drive signals driving ultrasonic transmitter of high pressure.Ultrasonic transmitter is in the effect of high-voltage driven signal
Under, it generates and emits in ultrasonic wave direction air.Ultrasonic receiver receives the transmitted wave signal from vehicle chassis from air, will
It is converted into electric signal, and send ultrasonic wave driving to by circuit is handled with signal processing circuit.
In specific implementation, TI may be used with signal processing circuit in ultrasonic wave driving（Texas Instrument）TDC1000,
PGA450, PGA460 etc..All transformers in ultrasonic wave used in conventional cartborne ultrasound wave radar may be used in booster circuit, such as
B78416A2232A003 of TDK etc..Conventional cartborne ultrasound wave radar may be used in ultrasonic transmitter and ultrasonic receiver
Water proof type ultrasonic transducer used, such as MA58MF14-7N of Murata etc..
In order to which ponding is overcome to influence, ultrasonic detector is mounted on berth lock shell side, while in ultrasonic listening
Device right opposite sets up an oblique reflection face with horizontal plane into 45 degree of angles.The effect of reflecting surface is to realize effective reflection of sound wave,
Can be made of the metals such as iron, aluminium or the nonmetallic materials with identical function.The reflecting surface can be integrally fixed at berth lock
Shell on, become shell a part or directly by shell integrally casting pressing formation.The reflecting surface can also exist on parking stall
Pressing formation is integrally cast on the stopping device of lock or by stopping device.This method causes ponding to be difficult to gather on ultrasonic detector surface
Collection, while by reflecting surface, realize normal transmission and the reception of ultrasonic wave.
In the utility model, when carrying out parking space state detection, first by illuminance and the method for geomagnetism detecting
State-detection is carried out, when that can not confirm whether testing result is accurate, restarts ultrasonic wave and is detected.Particularly, exist
During vehicles while passing parking stall, vehicle body shade can lead to the significant changes of illuminance, be can be confirmed whereby when illuminance does not have
During variation, it is impossible to which there are vehicles while passing event, the state of parking stall can unconditionally remain unchanged at this time, so as to exclude from magnetic
Field, the disturbing factor of ultrasonic wave, reduce rate of false alarm.When ambient light deficiency, for example, night or underground, illuminance sensing
Device possibly can not sense illuminance variation during vehicles while passing, at this point it is possible to ignore illumination degrees of data, degenerate for based on ground
Magnetic, ultrasonic wave, berth lock feedback information carry out state-detection.Since the ferromagnetic component of vehicle body, such as gearbox, cast iron start
Machine, chassis iron structure etc. can disturb earth's magnetic field, can detect the disturbance in earth's magnetic field to judge whether there is vehicle parking on parking stall.
Wherein, it when the terrestrial magnetic disturbance detected is strong enough, can directly firmly believe with the presence of vehicle, and no longer need to enable ultrasonic wave
It detects to determine that vehicle whether there is.Only when the terrestrial magnetic disturbance detected is not strong enough, just need to start ultrasonic listening
Determine that vehicle whether there is, so as to saving power consumption.Berth lock can confirm that parking stall is by the method that stopping device physics is touched
It is no to have vehicle parking, i.e., during stopping device rise, if parking stall, without vehicle, the process of rise will not be by any obstruction；And
When parking stall has vehicle to park, rise process will touch vehicle chassis, can not rise.The information that the physical method confirms has very high
Confidence level, therefore illuminance, earth magnetism, the progress error correction of ultrasound examination part, correction etc. can be fed back to.Meanwhile work as stopping device
After rising successfully, vehicle can not drive into parking stall, can stop under this state based on other hands such as earth magnetism, illuminance and ultrasonic waves
The parking space state detection process of section, until berth lock stopping device is fallen again, further to save power consumption.
Claims (8)
1. a kind of stall testing apparatus based on multisensor combined detection suitable for automatic parking lock is sensed including earth magnetism
Device, ultrasonic sensor and processor, it is characterised in that：Described device further includes the optical sensor being electrically connected with processor；
The optical sensor is connected to processor by SPI, I2C digital interface or analog level signal line；Earth magnetism senses
Device and ultrasonic sensor are connected to processor by SPI, I2C digital interface；
Parking stall lock controller is also electrically connected on the processor；
After parking stall lock controller receives lock signal, geomagnetic sensor, ultrasonic sensor and optical sensor are stopped,
Until parking stall lock controller receives unlocking signal.
2. it is suitable for the stall testing apparatus based on multisensor combined detection of automatic parking lock as described in claim 1,
It is characterized in that：The processor is connected to vehicle by the digital level interface of SPI, I2C, UART digital interface or switching value
Position lock controller.
3. it is suitable for the stall testing apparatus based on multisensor combined detection of automatic parking lock as described in claim 1,
It is characterized in that：The geomagnetic sensor is 1 axis magnetoresistive sensor, 2 axis magnetoresistive sensors, 3 axis magnetoresistive sensors, digital magnetic sieve
Disk or 6 axle sensors, 9 axle sensors with magnetic compass function.
4. it is suitable for the stall testing apparatus based on multisensor combined detection of automatic parking lock as described in claim 1,
It is characterized in that：The ultrasonic sensor includes ultrasonic wave driving and signal processing circuit, ultrasonic wave driving and signal processing
Circuit is connect by signal line with booster circuit, and booster circuit is connect by signal line with ultrasonic transmitter, ultrasonic wave
Receiver is driven with ultrasonic wave by signal line and is connect with signal processing circuit.
5. it is suitable for the stall testing apparatus based on multisensor combined detection of automatic parking lock as described in claim 1,
It is characterized in that：Described device further includes berth lock, and wherein ultrasonic detector is located at berth lock shell side, is visited in ultrasonic wave
Surveying device right opposite tool, there are one reflectings surface.
6. it is suitable for the stall testing apparatus based on multisensor combined detection of automatic parking lock as claimed in claim 5,
It is characterized in that：Reflecting surface is fixed on the shell of berth lock or integrally casts pressing formation by shell.
7. it is suitable for the stall testing apparatus based on multisensor combined detection of automatic parking lock as claimed in claim 5,
It is characterized in that：Reflecting surface is set on the stopping device of berth lock or integrally casts pressing formation by stopping device.
8. it is suitable for the stall testing apparatus based on multisensor combined detection of automatic parking lock as claimed in claim 5,
It is characterized in that：The reflecting surface and horizontal plane are into 45 degree of angles.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721699171.3U CN207558194U (en) | 2017-12-08 | 2017-12-08 | A kind of stall testing apparatus based on multisensor combined detection suitable for automatic parking lock |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721699171.3U CN207558194U (en) | 2017-12-08 | 2017-12-08 | A kind of stall testing apparatus based on multisensor combined detection suitable for automatic parking lock |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108399754A (en) * | 2018-03-09 | 2018-08-14 | 上海畅停信息科技有限公司 | A kind of Vehicular intelligent detection method in shared berth lock |
| CN109544886A (en) * | 2018-10-22 | 2019-03-29 | 柳州治业科技有限公司 | A kind of compound more means vehicle detecting equipments in trackside parking stall |
| CN109544978A (en) * | 2018-12-28 | 2019-03-29 | 重庆甲虫网络科技有限公司 | A kind of vehicle detecting algorithm based on geomagnetic sensor and light sensor |
| CN109613523A (en) * | 2018-10-23 | 2019-04-12 | 南通赛洋电子有限公司 | A kind of fathometer signal pre-processing circuit |
| CN110728847A (en) * | 2019-08-07 | 2020-01-24 | 厦门南鹏物联科技有限公司 | Parking space detection device |
| CN110766952A (en) * | 2019-12-06 | 2020-02-07 | 中佳易科技(北京)有限责任公司 | Parking detection device and method |
-
2017
- 2017-12-08 CN CN201721699171.3U patent/CN207558194U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108399754A (en) * | 2018-03-09 | 2018-08-14 | 上海畅停信息科技有限公司 | A kind of Vehicular intelligent detection method in shared berth lock |
| CN108399754B (en) * | 2018-03-09 | 2020-11-03 | 上海畅停信息科技有限公司 | Intelligent detection method for vehicles in shared parking spot lock |
| CN109544886A (en) * | 2018-10-22 | 2019-03-29 | 柳州治业科技有限公司 | A kind of compound more means vehicle detecting equipments in trackside parking stall |
| CN109544886B (en) * | 2018-10-22 | 2021-02-19 | 柳州治业科技有限公司 | Compound multi-hand section vehicle sensing equipment of trackside parking stall |
| CN109613523A (en) * | 2018-10-23 | 2019-04-12 | 南通赛洋电子有限公司 | A kind of fathometer signal pre-processing circuit |
| CN109613523B (en) * | 2018-10-23 | 2023-04-07 | 南通赛洋电子有限公司 | Probe instrument signal preprocessing circuit |
| CN109544978A (en) * | 2018-12-28 | 2019-03-29 | 重庆甲虫网络科技有限公司 | A kind of vehicle detecting algorithm based on geomagnetic sensor and light sensor |
| CN110728847A (en) * | 2019-08-07 | 2020-01-24 | 厦门南鹏物联科技有限公司 | Parking space detection device |
| CN110766952A (en) * | 2019-12-06 | 2020-02-07 | 中佳易科技(北京)有限责任公司 | Parking detection device and method |
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