CN107481546A - A kind of parking stall supervision intelligence sensor and parking stall monitoring and managing method - Google Patents
A kind of parking stall supervision intelligence sensor and parking stall monitoring and managing method Download PDFInfo
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- CN107481546A CN107481546A CN201710700136.7A CN201710700136A CN107481546A CN 107481546 A CN107481546 A CN 107481546A CN 201710700136 A CN201710700136 A CN 201710700136A CN 107481546 A CN107481546 A CN 107481546A
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/14—Traffic control systems for road vehicles indicating individual free spaces in parking areas
- G08G1/145—Traffic control systems for road vehicles indicating individual free spaces in parking areas where the indication depends on the parking areas
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/042—Detecting movement of traffic to be counted or controlled using inductive or magnetic detectors
Abstract
The invention belongs to parking stall measure field, it is proposed that a kind of parking stall supervision intelligence sensor and parking stall monitoring and managing method.The car comprises the following steps for monitoring and managing method：Measure the magnetic field data U of parking stall center in real time respectively by geomagnetic sensor and temperature sensoroutWith temperature data Tout, there is car threshold value U in setting magnetic fieldmaxAnd magnetic field is without car threshold value Umin, and temperature change threshold value Tmax, and sampling time interval t0；The judgement being whether there is according to magnetic field data and temperature data progress vehicle：If current state is without car, and if only if magnetic field data Uout＞ UmaxAnd temperature data change Delta Tout＞ TmaxWhen, parking space state is from being changed into having car without car；If current state works as U to there is carout＜ UminWhen, parking space state is changed into no car from there is car.The present invention can accurately judge parking space information, low in energy consumption, can be widely applied to parking stall measure field.
Description
Technical field
The invention belongs to parking stall measure field, and in particular to a kind of parking stall supervision intelligence sensor and parking stall monitoring and managing method.
Background technology
As the improvement of people's living standards, private car quantity sharply increases.The method of traditional parking lot labor management
The needs of people can not have been met, occurred new Intelligentized parking lot management system in the market, wherein difficult
Development of the point in parking stall measure sensor.At present method for detecting parking stalls on the market mainly include ultrasonic wave, radio frequency, infrared ray,
The detection method such as video and earth magnetism, wherein the detection technique based on earth magnetism is with the fastest developing speed.The method mainly passes through inspection
Measuring car entrance or influence when sailing out of parking stall to magnetic field of the earth around parking stall judge parking space state information, have inspection
Survey that precision is high, installation is simple, easy to maintenance, by the less advantage of the such environmental effects such as weather, but due to can not be to metal device
Part is accurately judged, it is easy to which to parking space state information flase drop, i.e., the metal device of similar bicycle can cause parking space state
The flase drop of information.Therefore it is badly in need of a kind of new car to fixed parking stall to carry out intelligentized detection and upload parking space state
The sensor of information.Publication No. CN205656781U, publication date disclose for the Chinese patent literature on October 19th, 2016
A kind of earth induction parking stall measure system with monitoring temperature, the environment temperature progress to multiple diverse locations is mentioned in the literature
Detection, both the arithmetic speed to CPU processor and the power consumption of sensor proposed higher requirement, while added detection peace
The difficulty and cost of dress, there is the drawbacks of certain in practice.
The content of the invention
The present invention overcomes the shortcomings of the prior art, and technical problem to be solved is：It is higher to provide a kind of accuracy
Parking stall supervision intelligence sensor and parking stall monitoring and managing method.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：Supervise intelligence sensor, bag in a kind of parking stall
Include temperature sense module, microcontroller, TMR magnetic induction measurements module, signal processing module, wireless communication module, power supply
Module and battery, the signal output part of the TMR magnetic induction measurements module is through the signal processing module and the microcontroller
Connection, the signal output part of the temperature sense module are connected with the microcontroller, and the microcontroller passes through described wireless
Communication module is connected with parking stall management control centre, and the battery passes through the power supply module and the temperature sense mould
Block, microcontroller, TMR magnetic induction measurements module, signal processing module and wireless communication module connect respectively；The temperature sense
Module is used to measure parking stall environment temperature, and the TMR magnetic induction measurements module is used to detecting parking stall magnetic field intensity, at the signal
Reason module is used for the differential voltage signal for receiving the output of TMR magnetic induction measurements module, and single channel voltage is formed after carrying out processing amplification
Signal is sent to microcontroller；The microcontroller is used for the magnetic field data measured according to geomagnetic sensor and temperature sensor is surveyed
The temperature data of amount carries out the judgement that vehicle whether there is, and will determine that result and parking stall numbering are uploaded to by wireless communication module
Parking stall management control centre, its determination methods are as follows：If state is without car before, the magnetic field data of and if only if present sample
Uout＞ UmaxAnd temperature data change Delta Tout＞ TmaxWhen, parking space state is from being changed into having car without car；If current state is to have car,
Work as Uout＜ UminWhen, parking space state is changed into no car from there is car；Wherein, temperature data change Delta Tout=Tout(t)-Tout(t-t0),
Tout(t) temperature data obtained for current sample time t measurements, Tout(t-t0) it is previous sampling instant t-t0What measurement obtained
Temperature data, t0For sampling time interval, UmaxThere are car threshold value, U for the magnetic field of settingminFor setting magnetic field without car threshold value, Tmax
For the temperature change threshold value of setting.
A kind of described parking stall supervision intelligence sensor, in addition to solar energy photovoltaic panel and power management module, it is described too
Positive energy photovoltaic panel is charged the battery by the power management module.
The master chip of the TMR magnetic induction measurements module is Magnetic Induction chip TMR2102, the temperature sense module
Master chip is DS18B20, and the master chip of the signal processing module is AD620, and the multiplication factor of the signal processing module is
100 times；The battery is 3.7V lithium batteries, and the power supply module includes RT9193-33 chips and RT9193-50 chips,
The master chip of the power management module is TP4056, and the wireless communication module includes model SX1278 master chips and is used for
Transmitting and the antenna of reception signal, the wireless communication module and the communication protocol of parking stall management control centre are UART.
The microcontroller is additionally operable to when parking space state changes, and reduces sampling time interval, and in parking stall shape
State keep more than 10 minutes it is constant when, increase sampling time interval.
A kind of parking stall monitoring and managing method proposed by the present invention, comprises the following steps：
(1) the magnetic field data U of parking stall center is measured in real time respectively by geomagnetic sensor and temperature sensoroutWith
Temperature data Tout；
(2) there is car threshold value U in setting magnetic fieldmaxAnd magnetic field is without car threshold value Umin, and temperature change threshold value Tmax, and sampling
Time interval t0；
(3) the real-time magnetic field data and the temperature data of temperature sensor measurement measured according to geomagnetic sensor carry out vehicle
The judgement whetheing there is, its determination methods are as follows：If current state is without car, and if only if magnetic field data Uout＞ UmaxAnd temperature number
According to change Delta Tout＞ TmaxWhen, parking space state is from being changed into having car without car；If current state works as U to there is carout＜ UminWhen, car
Position state is from there is car to be changed into no car；Wherein, temperature data change Delta Tout=Tout(t)-Tout(t-t0), Tout(t) it is currently to adopt
The temperature data that the t measurements of sample moment obtain, Tout(t-t0) it is previous sampling instant t-t0Measure obtained temperature data.
The setting range of the temperature change threshold value is：10~20 DEG C；The sampling time interval t0For 3~5 minutes.
The present invention has the advantages that compared with prior art：
1. a kind of parking stall supervision intelligence sensor provided by the invention and parking stall monitoring and managing method are to be directed to automobile ferromagnetic material
And double detection modes of car engine temperature go to judge parking space state information, can more precisely, judge parking stall in real time
Status information, and biosensor power consumption is low, it is easy for installation, cost is low；
2. wireless radio-frequency used in sensor of the invention has, cost is low, transmission is convenient and high-transmission efficiency
Huge advantage, developed rapidly in the whole world, become the major way of Internet of Things information transfer.
Brief description of the drawings
Fig. 1 is a kind of flow chart for parking stall monitoring and managing method that the embodiment of the present invention proposes；
Fig. 2 is a kind of electrical block diagram for supervision intelligence sensor that the embodiment of the present invention proposes.
Embodiment
, below will be in the embodiment of the present invention to make the purpose, technical scheme and advantage of the embodiment of the present invention clearer
Technical scheme be clearly and completely described, it is clear that described embodiment be the present invention part of the embodiment, without
It is whole embodiments；Based on the embodiment in the present invention, those of ordinary skill in the art are not before creative work is made
The every other embodiment obtained is put, belongs to the scope of protection of the invention.
As shown in figure 1, the present invention proposes a kind of parking stall monitoring and managing method, comprise the following steps：
(1) the real-time magnetic field data of parking stall center are measured in real time respectively by geomagnetic sensor and temperature sensor
UoutWith real time temperature data Tout；
(2) there is car threshold value U in setting magnetic fieldmaxAnd without car threshold value Umin, temperature change threshold value TmaxAnd between the sampling time
Every t0, wherein there is car threshold value UmaxAnd without car threshold value UminRelation be Umax＞ Umin；
(3) magnetic field data and the temperature data of temperature sensor measurement measured in real time according to geomagnetic sensor carries out vehicle
The judgement whetheing there is, its determination methods are as follows：
(301) if current state is without car, judge whether magnetic field data meets Uout＞ Umax, if not satisfied, judging car
Position state remains as no car；If satisfied, judging whether temperature data change meets Δ T againout＞ Tmax, if not satisfied, then judging
Parking space state remains as no car, if satisfied, then judging parking space state from being changed into having car without car；
(302) if current state judges whether magnetic field data meets U to there is carout＜ Umin, if not satisfied, then judging car
Position state has remained as car, if satisfied, then judging parking space state from there is car to be changed into no car；
Wherein, temperature data change Delta Tout=Tout(t)-Tout(t-t0), Tout(t) measured for current sample time t
The temperature data arrived, Tout(t-t0) it is previous sampling instant t-t0Measure obtained temperature data.
Wherein, the setting range of temperature change threshold value is：10~20 DEG C, the sampling time interval is 3~5 minutes.Magnetic
There is car threshold value U fieldmaxAnd magnetic field is without car threshold value UminThe magnitude of voltage that voltage electromagnetic sensor measures is can be set as, wherein,
There is car threshold value U in magnetic fieldmaxThe magnitude of voltage that Magnetic Sensor measures when having car slightly larger than parking stall, magnetic field is without car threshold value UminIt should be slightly less than
The magnitude of voltage that geomagnetic sensor measures when parking stall is without car.
As shown in Fig. 2 the embodiment of the present invention additionally provides a kind of parking stall supervision intelligence sensor, including temperature sense module
1st, TMR magnetic induction measurements module 2, signal processing module 3, microcontroller 4, wireless communication module 5, power supply module 6 and electricity
Pond 7, the signal output part of the TMR magnetic induction measurements module 2 are connected through the signal processing module 3 with the microcontroller 4,
The signal output part of the temperature sense module 1 is connected with the microcontroller 4, and the microcontroller 4 passes through the channel radio
Letter module 5 is connected with parking stall management control centre 10, and the battery 7 passes through the power supply module 6 and the temperature sense
Module, microcontroller, TMR magnetic induction measurements module, the power input of signal processing module and wireless communication module connect respectively
Connect.The temperature sense module 1 is used to measure parking stall environment temperature, and the TMR magnetic induction measurements module 2 is used to detect parking stall magnetic
Field intensity, the signal processing module 3 are used for the differential voltage signal for receiving the output of TMR magnetic induction measurements module 2, handled
Single channel voltage signal is formed after amplification to send to microcontroller；The microcontroller 4 is used for the magnetic according to geomagnetic sensor measurement 1
The temperature data of field data and temperature sensor measurement carries out the judgement that vehicle whether there is, and will determine that result and parking stall numbering are led to
Cross wireless communication module and be uploaded to parking stall management control centre, its determination methods is as follows：If before state be without car, when and only
As the magnetic field data U of present sampleout＞ UmaxAnd temperature data change Delta Tout＞ TmaxWhen, parking space state is changed into having from without car
Car；If current state works as U to there is carout＜ UminWhen, parking space state is changed into no car from there is car；Wherein, temperature data changes delta
Tout=Tout(t)-Tout(t-t0), Tout(t) temperature data obtained for current sample time t measurements, Tout(t-t0) it is previous
Sampling instant t-t0Measure obtained temperature data, t0For sampling time interval, UmaxThere are car threshold value, U for the magnetic field of settingminFor
The magnetic field of setting is without car threshold value, TmaxFor the temperature change threshold value of setting.
The sensor is installed at the center of parking stall, and TMR magnetic induction measurements module is arranged on parallel to parking stall
Direction on, when vehicle drives into or sails out of parking stall, both can quickly and accurately measure temperature caused by engine and become
The change in the parking stall magnetic field caused by change and automobile ferromagnetic material, turn avoid vehicle may when driving into or sailing out of parking stall
To the destruction caused by sensor.
Further, as shown in Fig. 2 a kind of intelligent car position supervision sensor of the embodiment of the present invention also includes solar energy
Lie prostrate plate 8 and power management module 9, the solar energy photovoltaic panel 8 can be 2 pieces, be separately positioned on the both ends of sensor, it is described too
Positive energy photovoltaic panel 8 is charged by the power management module 9 to battery 7.The master chip of power management module can be TP4056,
The advantages of chip including battery temperature detection, undervoltage lockout, automatic recharge and two are used to indicating charging, terminate
LED state pin, the maximized thermal conditioning function of charge rate can be realized in the case of dangerous without overheat, be internally integrated simultaneously
Anti-down charging circuit, effectively can prevent from overcharging, fills.The sensor can realize self-powered, when once mounting can be long
Between apply, avoid and change the maintenance procedures such as battery.
Further, the master chip of the TMR magnetic induction measurements module is Magnetic Induction chip TMR2102, the chip base
In advanced forth generation magnetic sensing technology --- tunnel magneto resistance (TMR) technology, the chip internal are integrated by four pieces of sensing parts
Output difference voltage signal after Wheatstone bridge, it can both be used for changing the signal of magnetic resistance sensor, make its output voltage just
In being exaggerated, change the noise of signal, reduce temperature drift, while there is the advantages of high sensitivity, wide dynamic range and low-power consumption again.
The differential voltage signal Vin exported after Magnetic Induction chip TMR2102 detections-、Vin+Transmit to signal processing module 3；The letter
The master chip of number processing module 3 is AD620, has cost low, and precision is high, and gain ranging is wide, power consumption extremely low (only 1.3mA) it is excellent
Point；After signal processing module 3 carries out processing amplification to the differential voltage signal received, the single channel voltage signal stablized
For：Vout=-G (Vin--Vin+)+Vref, whereinG is master chip AD620 multiplication factor, can be passed through
Adjust non-essential resistance RGResistance determine multiplication factor, R hereG500 Ω are arranged to, i.e. multiplication factor is arranged to 100, then
Vout is sent to microcontroller 4.
The master chip of the temperature sense module is DS18B20, after automobilism for a period of time, its engine temperature
For 85~90 DEG C, if automobile drives into parking stall, rise will certainly be caused to influence on the environment temperature near parking stall, temperature sense
After module 1 detects parking stall environment temperature, it is converted into 16 bits and transmits to microcontroller 4.
Microcontroller 4 is located after receiving the two paths of signals of temperature sense module and TMR magnetic induction measurement module transfers
Reason, data signal Uout, 16 binary systems corresponding to temperature value are converted into by the analog signal Vout corresponding to magnetic field intensity
Decimal number Tout is read as, and car threshold value U is had according to setting magnetic fieldmax, magnetic field is without car threshold value Umin, temperature change threshold value Tmax
To be judged to parking space state.When vehicle enters parking stall (entering parking stall along sensor sensing direction), magnitude of voltage first increases
It is decreased to stationary value after big；When vehicle leaves parking stall (sailing out of parking stall along sensor sensing direction in opposite direction), voltage
Value first reduces increases to stationary value afterwards.Therefore, if in the case of without car, if current Uout ＞ UmaxAnd Tout ＞ Tmax, then illustrate
The magnetic field intensity of parking stall increases up to decision content, and temperature change also reaches decision content, therefore microcontroller decision state is automobile
Drive into parking stall；If Uout ＞ UmaxBut it is unsatisfactory for Tout ＞ TmaxOr Tout ＞ TmaxBut it is unsatisfactory for Uout ＞ Umax, then microcontroller
Device judges that parking space state remains as no car；In the case of having car, once Uout ＜ Umin, then illustrate that the magnetic field intensity of parking stall does not reach
To decision content, regardless of temperature change, microcontroller directly judges parking space state for without car；Microcontroller 17 is to two paths of signals
Output includes 8 bits of the information such as parking stall numbering, state after processing judges, and uploads number by wireless communication module 5
According to bag to parking stall management control centre, parking stall management control centre is handled after reading binary number information and by parking space state
Presentation of information is at interface.The master chip of the wireless communication module is SX1278, is a high performance radio frequency chip, the chip
433MHz frequencies are operated in, there is the advantages of high-performance, super low-power consumption, extra long distance radio-frequency receiving-transmitting, can be in the feelings of low-power consumption
Extra long distance radio communication is realized under condition.The wireless communication module also configures 433MHz spring antenna simultaneously, for launching
With reception signal, the wireless communication module and the communication protocol of parking stall management control centre are UART.
In addition, the microcontroller is additionally operable to when parking space state changes, reduce sampling time interval, and in car
Position state keep more than 10 minutes it is constant when, increase sampling time interval.It is specifically as follows, when parking space state does not change
When, it is 5 minutes to set sampling time interval, and when parking space state changes, it is 1~3 minute to reduce sampling time interval, this
When, parking space state is constantly sent to parking stall management control centre by microcontroller, is shown by interface, prompts staff's note
Meaning；When parking space state keep 10 minutes it is constant when, will be arranged in the sampling time 5 minutes again, to reduce biosensor power consumption, increase
Its service time of battery.
Further, the battery 7 is 3.7V lithium batteries, the power supply module include RT9193-33 chips and
RT9193-50 chips, power supply module are provided 3.7V voltage by lithium battery, by the control source to RT9193-33 and
Stable 3.3V and 5.0V voltage are exported after RT9193-50 chips, meets TMR magnetic induction measurements module 2, temperature sense module
1st, the supply voltage demand of wireless communication module 5, signal processing module 3, microcontroller 4.
A kind of parking stall supervision intelligence sensor provided in an embodiment of the present invention, can also include plastic casing, the temperature
Induction module 1, TMR magnetic induction measurements module 2, signal processing module 3, microcontroller 4, wireless communication module 5, power supply mould
Block 6 and battery 7 are fixedly installed in the plastic casing, and the material of the plastic casing is PA66, is also had in higher temperature
Stronger strength and stiffness, meet the requirement of sensor.
The parameter of this sensor can be：
Sensitivity：4.9mV/V/G
Magnetic hysteresis：0.1Oe
Operating voltage and electric current：3.3V≤Vcc≤5V, I≤10mA
Drift：≤3nT/h
Magnetic field intensity scope：±6Oe
Operating temperature：- 40 DEG C~60 DEG C
Communication protocol：UART.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, either which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (6)
1. intelligence sensor is supervised in a kind of parking stall, it is characterised in that including temperature sense module, microcontroller, TMR magnetic induction inspection
Survey module, signal processing module, wireless communication module, power supply module and battery, the letter of the TMR magnetic induction measurements module
Number output end is connected through the signal processing module with the microcontroller, the signal output part of the temperature sense module and institute
Microcontroller connection is stated, the microcontroller is connected by the wireless communication module with parking stall management control centre, the electricity
Pond passes through the power supply module and the temperature sense module, microcontroller, TMR magnetic induction measurements module, signal transacting
Module and wireless communication module connect respectively；
The temperature sense module is used to measure parking stall environment temperature, and the TMR magnetic induction measurements module is used to detect parking stall magnetic
Field intensity, the signal processing module are used for the differential voltage signal for receiving the output of TMR magnetic induction measurements module, carry out processing and put
Single channel voltage signal is formed after big to send to microcontroller；
The temperature data that the microcontroller is used for the magnetic field data and temperature sensor measurement measured according to geomagnetic sensor enters
A driving judgement whetheing there is, and will determine that result and parking stall numbering are uploaded in parking stall management control by wireless communication module
The heart, its determination methods are as follows：If state is without car before, the magnetic field data U of and if only if present sampleout＞ UmaxAnd temperature
Data variation Δ Tout＞ TmaxWhen, parking space state is from being changed into having car without car；If current state works as U to there is carout＜ UminWhen,
Parking space state is changed into no car from there is car；Wherein, temperature data change Delta Tout=Tout(t)-Tout(t-t0), Tout(t) it is current
The temperature data that sampling instant t measurements obtain, Tout(t-t0) it is previous sampling instant t-t0Measure obtained temperature data, t0For
Sampling time interval, UmaxThere are car threshold value, U for the magnetic field of settingminFor setting magnetic field without car threshold value, TmaxFor the temperature of setting
Change threshold.
2. a kind of parking stall supervision intelligence sensor according to claim 1, it is characterised in that also including solar energy photovoltaic panel
And power management module, the solar energy photovoltaic panel are charged the battery by the power management module.
A kind of 3. parking stall supervision intelligence sensor according to claim 2, it is characterised in that the TMR magnetic induction measurements
The master chip of module is Magnetic Induction chip TMR2102, and the master chip of the temperature sense module is DS18B20, the signal
The master chip of processing module is AD620, and the multiplication factor of the signal processing module is 100 times；The battery is 3.7V lithiums electricity
Pond, the power supply module include RT9193-33 chips and RT9193-50 chips, the master chip of the power management module
For TP4056, the wireless communication module includes model SX1278 master chips and for launching the antenna with reception signal, institute
It is UART to state wireless communication module and the communication protocol of parking stall management control centre.
4. a kind of parking stall supervision intelligence sensor according to claim 1, it is characterised in that the microcontroller is additionally operable to
When parking space state changes, reduce sampling time interval, and parking space state keep more than 10 minutes it is constant when, increase
Sampling time interval.
5. a kind of parking stall monitoring and managing method, it is characterised in that comprise the following steps：
(1) the magnetic field data U of parking stall center is measured in real time respectively by geomagnetic sensor and temperature sensoroutAnd temperature
Data Tout；
(2) there is car threshold value U in setting magnetic fieldmaxAnd magnetic field is without car threshold value Umin, and temperature change threshold value Tmax, and the sampling time
It is spaced t0；
(3) the real-time magnetic field data and the temperature data of temperature sensor measurement measured according to geomagnetic sensor carry out vehicle whether there is
Judgement, its determination methods is as follows：If current state is without car, and if only if magnetic field data Uout＞ UmaxAnd temperature data becomes
Change Δ Tout＞ TmaxWhen, parking space state is from being changed into having car without car；If current state works as U to there is carout＜ UminWhen, parking stall shape
State is changed into no car from there is car；Wherein, temperature data change Delta Tout=Tout(t)-Tout(t-t0), Tout(t) when being present sample
Carve the temperature data that t measurements obtain, Tout(t-t0) it is previous sampling instant t-t0Measure obtained temperature data.
A kind of 6. parking stall monitoring and managing method according to claim 5, it is characterised in that：The setting model of the temperature change threshold value
Enclose for：10~20 DEG C；The sampling time interval t0For 3~5 minutes.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108898884A (en) * | 2018-08-31 | 2018-11-27 | 麦格星航（北京）科技有限公司 | A kind of real-time online parking stall monitoring terminal based on TMR |
| CN113009383A (en) * | 2019-12-03 | 2021-06-22 | 中车唐山机车车辆有限公司 | Monitoring system, urban rail train, monitoring method and terminal equipment |
| CN114898590A (en) * | 2022-06-02 | 2022-08-12 | 杭州时祺科技有限公司 | Parking space detection method and device based on infrared measurement |
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