CN104658306A - Vehicle in-place detection method and parking place monitoring device - Google Patents
Vehicle in-place detection method and parking place monitoring device Download PDFInfo
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- CN104658306A CN104658306A CN201310576499.6A CN201310576499A CN104658306A CN 104658306 A CN104658306 A CN 104658306A CN 201310576499 A CN201310576499 A CN 201310576499A CN 104658306 A CN104658306 A CN 104658306A
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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
- G08G1/141—Traffic control systems for road vehicles indicating individual free spaces in parking areas with means giving the indication of available parking spaces
- G08G1/142—Traffic control systems for road vehicles indicating individual free spaces in parking areas with means giving the indication of available parking spaces external to the vehicles
Abstract
The invention discloses a vehicle in-place detection method and a parking place monitoring device. The vehicle in-place detection method comprises steps: the parking place monitoring device detects a first low-frequency signal sent when a power system of the vehicle operates; and according to a detection result, whether a vehicle exists in the corresponding parking place is judged. Through the above technical scheme, the vehicle in-place detection method and the parking place monitoring device have a novel different detection way different from the traditional way, and are basically not influenced by changes of the magnetic field of the earth in the natural environment, material of the vehicle, and changes of environment temperature. Compared with the traditional scheme in which whether a vehicle exists is detected by depending on changes of a magnetic force line of a geomagnetic field, and accuracy and stability of detection are improved to a certain degree.
Description
Technical field
The present invention relates to electronic device field, particularly relate to a kind of vehicle at position detecting method and parking position monitoring device.
Background technology
Along with the arrival in Chinese automobile epoch, vehicle gets more and more, vehicle traditional is at present arrange geomagnetism detecting module in centre position, parking stall at position detecting method, and geomagnetism detecting module detects on this parking stall whether have vehicle by the change of this Shangdi, parking stall magnetic field magnetic line.There is many defects in this kind of mode, such as:
1). the magnetic field of the earth in physical environment can constantly change and cause error detection
Magnetic field of the earth amplitude every day in physical environment, per minute all can generation change minutely, and geomagnetism detecting module can not accurately identify this change, and will lead to errors detection.
2). the impact of the material of Some vehicles magnetic field magnetic line is over the ground faint, and more difficultly detects
Vehicle can regard the model of multiple bipolar magnet composition as, and its bipolar magnet has the polarised direction of North-south, causes the disturbance in magnetic field of the earth.These disturbances iron medium place in vehicle is particularly evident, its combined influence is distortion to the magnetic field of the earth magnetic line of force and distortion, if but iron-free medium or this vehicle affect not obvious on the magnetic field of the earth magnetic line of force on vehicle, the geomagnetism detecting module so on parking stall then cannot detect vehicle.
3). lead to errors because temperature changes rapidly detection
Such as during cloudy weather in summer, when the sun comes outbreak out from cloud layer, start suddenly to irradiate geomagnetism detecting module, the surface temperature of geomagnetism detecting module will change rapidly, and the detected value of geomagnetism detecting module also changes thereupon, and then the detection that leads to errors.
As can be seen here, traditional vehicle is at position detecting method existing defects.
Summary of the invention
The invention provides a kind of vehicle being different from above-mentioned traditional approach newly at position detecting method and parking position monitoring device.
For solving the problems of the technologies described above, the present invention by the following technical solutions:
A kind of vehicle is at position detecting method, according to testing result, the first low frequency signal sent when parking position monitoring device detects the power system operation of vehicle, judges whether corresponding parking stall has vehicle.
Further, judge whether corresponding parking stall has vehicle comprise according to testing result: the intensity of the first low frequency signal detected compared with predetermined threshold value, if the intensity of the first low frequency signal is more than or equal to predetermined threshold value, then judged result is that corresponding parking stall has vehicle.
Further, the intensity of the first low frequency signal detected also is comprised relatively before with predetermined threshold value: described parking position monitoring device detects on described corresponding parking stall without environment low frequency signal during vehicle; According to the intensity of the environment low frequency signal detected, and preset threshold value described in parameter value calculation of floating.
Further, according to the intensity of the environment low frequency signal detected, and also comprise before presetting threshold value described in parameter value calculation of floating: the described corresponding parking stall of described parking position monitoring device detection has the first low frequency signal during different vehicle; Float parameter value according to the intensity of each the first low frequency signal detected and the Strength co-mputation of described environment low frequency signal.
Further, if judged result is that corresponding parking stall has vehicle, also comprise: described parking position monitoring device is communicated with the car-mounted device of described vehicle by low frequency and/or radio-frequency channel; And/or described parking position monitoring device and back-stage management center to center communications.
Further, described parking position monitoring device to be communicated with the car-mounted device of described vehicle by low frequency and radio-frequency channel and is specially: described parking position monitoring device sends radio communication parameter by the second low frequency signal to car-mounted device; Set up radio-frequency channel according to described radio communication parameter and described car-mounted device, carry out radio communication by described radio-frequency channel and described car-mounted device.
A kind of parking position monitoring device, comprising: low frequency detection module, the first low frequency signal sent during for detecting the power system operation of vehicle; According to the testing result of low frequency signal detection module, judge module, for judging whether corresponding parking stall has vehicle.
Further, judge module compares with predetermined threshold value specifically for the intensity of the first low frequency signal detected by low frequency detection module, if the intensity of the first low frequency signal is more than or equal to predetermined threshold value, is then judged as that there is vehicle corresponding parking stall.
Further, low frequency detection module is also for detecting on described corresponding parking stall without environment low frequency signal during vehicle; Described parking position monitoring device also comprises threshold value computing module, for the intensity of environment low frequency signal detected according to low frequency detection module, and presets threshold value described in parameter value calculation of floating.
Further, low frequency detection module is also for detecting the first low frequency signal when described corresponding parking stall having different vehicle; Described parking position monitoring device also comprises floating parameter value calculation module, for there being floating parameter value described in the Strength co-mputation of the intensity of the first low frequency signal detected during different vehicle and described environment low frequency signal on described corresponding parking stall according to low frequency detection module.
Further, parking position monitoring device also comprises: LF communication module, for being communicated with car-mounted device by low channel; Radio-frequency communication module, for communicating with car-mounted device by radio-frequency channel; And/or, background communication module, for back-stage management center to center communications.
Further, LF communication module is specifically for sending radio communication parameter by the second low frequency signal to car-mounted device; Radio-frequency communication module, specifically for setting up radio-frequency channel according to described radio communication parameter and described car-mounted device, carries out radio communication by described radio-frequency channel and described car-mounted device.
Further, low frequency detection module comprises the first inductive coil, the first low frequency signal sent during power system operation for the vehicle that is coupled; Described LF communication module comprises the second inductive coil, for the 3rd low frequency signal launching the second low frequency signal to car-mounted device and/or the car-mounted device that is coupled sends; Described first inductive coil and the second inductive coil are same inductive coil.
Vehicle provided by the invention is at position detecting method and parking position monitoring device, and the low frequency signal sent during the power system operation of parking position monitoring device by vehicle, detects on corresponding parking stall whether have vehicle.The change being different from traditional dependence terrestrial magnetic field magnetic line of force detects the scheme whether having vehicle, substantially not by the magnetic field of the earth change in physical environment, the material of vehicle, the impact of variation of ambient temperature.Improve the accuracy of detection, stability.
Accompanying drawing explanation
The vehicle that Fig. 1 provides for one embodiment of the invention is at the process flow diagram of position detecting method;
The schematic diagram of the parking position monitoring device that Fig. 2 provides for one embodiment of the invention;
The schematic diagram of the parking position monitoring device that Fig. 3 provides for another embodiment of the present invention;
The schematic diagram of the parking position monitoring device that Fig. 4 provides for another embodiment of the present invention;
The schematic diagram of the parking position monitoring device that Fig. 5 provides for another embodiment of the present invention.
Embodiment
The engine of motor vehicles a kind ofly other form can be converted into mechanical energy, by the external outputting power of mechanical energy, drives the machine of vehicle movement.Comprise as internal combustion engine (petrol engine etc.), external combustion engine (Stirling engine, steam engine etc.), motor etc.For the engine (such as internal combustion engine, external combustion engine etc.) with plug ignition function, timing can produce electric spark between sparking-plug electrode, high intensity noise signal (a kind of low frequency electromagnetic signals) is produced in the moment of igniting, under piston promotes, crankshaft rotating, shuttling movement also can produce the noise signal (a kind of low frequency electromagnetic signals) of characteristic frequency.For the engine (such as motor etc.) without plug ignition function, motor operation also can produce noise signal (a kind of low frequency electromagnetic signals).The power system of vehicle is including, but not limited to the engine of vehicle.The first low frequency signal sent during the power system operation of vehicle is including, but not limited to noise signal that the noise signal that the noise signal that plug ignition produces instantaneously, Crankshaft motion produce, motor operation produce.
By reference to the accompanying drawings the present invention is described in further detail below by embodiment.
The vehicle that Fig. 1 provides for the embodiment of the present invention one is at the process flow diagram of position detecting method, and please refer to Fig. 1, the method comprises following flow process:
The first low frequency signal that S101, parking position monitoring device send when detecting the power system operation of vehicle.
Parking position monitoring device can be arranged on corresponding parking stall or surrounding, can be arranged on ground, also can be embedded in below ground, determine according to parking stall concrete condition.Same parking stall can corresponding one or multiple parking position monitoring device.
S102, judge whether corresponding parking stall has vehicle according to testing result, if judged result is that corresponding parking stall has vehicle, then can select to enter step S103, if judged result is without vehicle on corresponding parking stall, then can select to get back to step S101.
In certain embodiments, judge whether corresponding parking stall has vehicle comprise according to testing result: the intensity of the first low frequency signal detected compared with predetermined threshold value, if the intensity of the first low frequency signal is more than or equal to predetermined threshold value, then judged result is that corresponding parking stall has vehicle, otherwise judged result is without vehicle on corresponding parking stall.Including, but not limited to: in real time by current detection to the intensity of the first low frequency signal compare with predetermined threshold value, if the intensity of the first low frequency signal is more than or equal to predetermined threshold value, be then judged as that there is vehicle corresponding parking stall; Or, judge whether corresponding parking stall has vehicle according to the intensity of the first low frequency signal detected in default measurement period, concrete: in real time by current detection to the intensity of the first low frequency signal compare with predetermined threshold value, as being more than or equal to predetermined threshold value, then count 1; The number of statistical counting 1 in default measurement period, and store statistical value; Statistical value in this default measurement period compares with first threshold, if be more than or equal to this first threshold, then judged result is that corresponding parking stall has vehicle.
In certain embodiments, threshold value can be determined in the following manner: parking position monitoring device detects on this corresponding parking stall without environment low frequency signal during vehicle; Again according to the intensity of the environment low frequency signal that detects (if repeated detection, can be the mean value of repeated detection, or the mean value calculated after getting rid of mxm. and minimum), and preset threshold value described in parameter value calculation of floating.This corresponding parking stall is measured data without the intensity of the environment low frequency signal detected during vehicle.Threshold value draws without measured data during vehicle and default parameter value calculation of floating according on this corresponding parking stall.
Preferably, in the process of the intensity of testing environment low frequency signal, ensure the interference without other electromagnetic signals as far as possible.
In certain embodiments, parking position monitoring device detects on this corresponding parking stall without after environment low frequency signal during vehicle, according to the intensity of the environment low frequency signal detected, before presetting threshold value described in parameter value calculation of floating, also comprise: judge whether the intensity of the environment low frequency signal detected meets the demands (such as, judge whether it is greater than threshold value, if be greater than threshold value, then illustrate that environment low frequency signal is too strong, do not meet the demands), if do not meet the demands, then prompting detects unsuccessfully and again detects, if meet the demands, then according to the intensity of the environment low frequency signal detected, with default threshold value described in parameter value calculation of floating.
In certain embodiments, according to the intensity of the environment low frequency signal detected, and default threshold value described in parameter value calculation of floating is specially: described threshold value equals the intensity of environment low frequency signal and presets parameter value sum of floating.
In certain embodiments, floating parameter value can be determined in the following manner: parking position monitoring device detects the first low frequency signal when this corresponding parking stall having different vehicle; Float parameter value according to the intensity of each the first low frequency signal detected and the Strength co-mputation of described environment low frequency signal.The intensity of the first low frequency signal when this corresponding parking stall having a different vehicle is measured data, and the parameter value that floats calculates without measured data during vehicle by this corresponding parking stall having on the parking stall corresponding to this of measured data during different vehicle.
In certain embodiments, the parameter value that floats according to the intensity of each the first low frequency signal detected and the Strength co-mputation of described environment low frequency signal is specially: the mean value of the difference that the intensity that the intensity that described floating parameter value equals each the first low frequency signal deducts environment low frequency signal obtains; Or, the difference that the intensity that the mean value that described floating parameter value equals the intensity of each the first low frequency signal deducts environment low frequency signal obtains.
If the judged result of S103 step S102 is that corresponding parking stall has vehicle, also comprise: parking position monitoring device is communicated with the car-mounted device of corresponding vehicle by low frequency and/or radio-frequency channel; And/or, parking position monitoring device and back-stage management center to center communications.Preferably, the frequency of LF communication is not less than 100Hz, and is no more than 10MHz, more excellent, and the frequency of LF communication is not less than 100Hz, and is no more than 300kHz.More excellent, be 125kHz.
Parking position monitoring device is communicated with the car-mounted device of corresponding vehicle by low frequency and/or radio-frequency channel, namely parking position monitoring device communicates with the car-mounted device of corresponding vehicle by means of only low channel, communicates by means of only the car-mounted device of radio-frequency channel with corresponding vehicle, and is communicated with the car-mounted device of radio-frequency channel with corresponding vehicle by low frequency.Parking position monitoring device can send radio communication parameter, parking space information (comprising parking stall mark, rate etc.) etc. by low frequency or radio-frequency channel to car-mounted device; Car-mounted device can send information of vehicles (as license plate number), owner information (owner name, cell-phone number, car owner deduct fees account number, car owner deduct fees card number, account balance etc.) by low frequency or radio-frequency channel to parking position monitoring device, further, in order to control power consumption, under original state, low channel, radio-frequency channel are closed, be, when corresponding parking stall having vehicle, be just unlocked in judged result.
In certain embodiments, the detailed process that parking position monitoring device is communicated with the car-mounted device of corresponding vehicle by low frequency and radio-frequency channel can comprise: parking position monitoring device sends radio communication parameter by the second low frequency signal to car-mounted device; Set up radio-frequency channel according to described radio communication parameter and this car-mounted device, carry out radio communication by this radio-frequency channel and this car-mounted device.Further, in order to control power consumption, after parking position monitoring device and car-mounted device set up radio-frequency channel, close low channel.
The communication mode at parking position monitoring device and back-stage management center comprises wireless, wired etc.Preferably, the judged result of step S102 is when corresponding parking stall having vehicle, and parking position monitoring device sends the occupied notice in parking stall to backstage administrative center.
In certain embodiments, also comprise the car-mounted device of S104, parking position monitoring device or corresponding vehicle by information of vehicles or owner information, and parking space information is sent to back-stage management center.Back-stage management center, after receiving the occupied notice in parking stall in step S103, can judge whether in Preset Time, receive corresponding vehicle on this parking stall information of vehicles or owner information; If do not receive, can notify that staff checks to scene, to get rid of undetected situation, if having received, back-stage management center just can parking stall is corresponding with the vehicle on this parking stall on, improve management quality.On this basis, back-stage management center can also control this car-mounted device further and carry out deducting fees or providing other to serve to car-mounted device.Be particularly useful for curb parking scene, only need to lay parking position monitoring device in corresponding parking stall, car-mounted device and back-stage management center is coordinated to use, without the need to through specific gateway, get off without the need to driver and swipe the card, without the need to the participation of managerial personnel, reduce handling cost, improve management quality, also for city vehicle administrative authority provides new management mode.
The schematic diagram of the parking position monitoring device that Fig. 2 provides for one embodiment of the invention, please refer to Fig. 2, parking position monitoring device 2 comprises: low frequency detection module 21, the first low frequency signal sent during for detecting the power system operation of vehicle; And judge module 22, for judging whether corresponding parking stall has vehicle according to the testing result of low frequency signal detection module.
In certain embodiments, low frequency detection module 21 comprises further: the first inductive coil, the first low frequency signal sent during power system operation for the vehicle that is coupled.
In certain embodiments, judge module 22 compares with predetermined threshold value specifically for the intensity of the first low frequency signal detected by low frequency detection module 21, if the intensity of the first low frequency signal is more than or equal to predetermined threshold value, is then judged as that there is vehicle corresponding parking stall.Including, but not limited to: judge module 22 in real time by low frequency detection module 21 current detection to the intensity of the first low frequency signal compare with predetermined threshold value, if the intensity of the first low frequency signal is more than or equal to predetermined threshold value, be then judged as that there is vehicle corresponding parking stall; Or, according to the intensity of the first low frequency signal detected in default measurement period, judge module 22 judges whether corresponding parking stall has vehicle, concrete: judge module 22 comprises the first comparison sub-module, counting submodule and the second comparison sub-module, first comparison sub-module be used in real time by low frequency detection module 21 current detection to the intensity of the first low frequency signal compare with predetermined threshold value, as being more than or equal to predetermined threshold value, then output symbol 1; Counting submodule is used for the number of adding up the first comparison sub-module output symbol 1 in default measurement period, and stores statistical value; Second comparison sub-module is used for the statistical value of counting submodule in this default measurement period to compare with the 3rd threshold value, if be more than or equal to the 3rd threshold value, then judged result is that corresponding parking stall has vehicle.
In certain embodiments; Low frequency detection module 21 or judge module 22 also comprise the first signal processing module, after carrying out presetting process to the first low frequency signal of the first inductive coil coupling, transfer to judge module 22.The first low frequency signal sent during the power system operation of the coupling vehicle of the first inductive coil continuation, first signal processing module can continuation or periodically carry out presetting process to the first low frequency signal of the first inductive coil coupling, its cycle can be determined according to the duration of the power system generation low frequency electromagnetic signals of vehicle, supposing that plug ignition produces duration of low frequency electromagnetic signals is T1, the duration that Crankshaft motion produces low frequency electromagnetic signals is T2, it is the cycle that first signal processing module can be similar to T1+T2, or approximate take T2 as the first low frequency signal processing the first inductive coil coupling the cycle.In certain embodiments, the first signal processing module comprises the signal analysis filtrator, amplifier, the signal buffer that connect successively; Signal analysis filtrator can periodic receipt first inductive coil coupling the first low frequency signal, carry out signature analysis, filter out irrelevant undesired signal; Amplifier be used for signal analysis filtrator export signal amplify, can be one-level amplify also can be multistage amplification, enlargement factor can adjust as requested; Signal buffer carries out buffer memory for what export amplifier through amplifying signal.
In certain embodiments, low frequency detection module 21 is also for detecting on corresponding parking stall without environment low frequency signal during vehicle; This parking position monitoring device 2 also comprises threshold value computing module 23 further, for the intensity of environment low frequency signal detected according to low frequency detection module 21, and presets threshold value described in parameter value calculation of floating.
In certain embodiments, low frequency detection module 21 is also for detecting the first low frequency signal when corresponding parking stall having different vehicle; Parking position monitoring device 2 also comprises floating parameter value calculation module 24 further, for there being floating parameter value described in the Strength co-mputation of the intensity of the first low frequency signal detected during different vehicle and described environment low frequency signal on described corresponding parking stall according to low frequency detection module 21.
In certain embodiments, parking position monitoring device 2 also comprises: LF communication module, radio-frequency communication module or background communication module, or comprise in LF communication module, radio-frequency communication module, background communication module arbitrarily both; Or comprise LF communication module, radio-frequency communication module and background communication module; Wherein, LF communication module is for communicating by the car-mounted device of low channel with the vehicle on corresponding parking stall; Radio-frequency communication module is for communicating by the car-mounted device of radio-frequency channel with the vehicle on corresponding parking stall; Background communication module is used for and back-stage management center to center communications.
As shown in Figure 3, be that parking position monitoring device 2 also comprises LF communication module 25 and background communication module 27 with Fig. 2 difference.LF communication module 25 is mainly used in sending parking space information etc. to car-mounted device, receive information of vehicles, owner information etc. that car-mounted device sends.Background communication module 27 is mainly used in the information receiving the transmission of back-stage management center, and sends information to backstage administrative center, such as, when the judged result of judge module 22 is when corresponding parking stall having vehicle, sends the occupied notice in parking stall to backstage administrative center; After receiving the information of vehicles or owner information that car-mounted device sends, send information of vehicles or owner information to backstage administrative center, and parking space information.Further, in order to control power consumption, under original state, LF communication module 25 is closed, and is that when corresponding parking stall having vehicle, judge module 22 triggers LF communication module 25 and opens in the judged result of judge module 22.
As shown in Figure 4, with Fig. 2 difference be, parking position monitoring device 2 also comprises: radio-frequency communication module 26 and background communication module 27.Radio-frequency communication module 26 is mainly used in sending parking space information etc. to car-mounted device, receive information of vehicles, owner information etc. that car-mounted device sends.Background communication module 27 is mainly used in the information receiving the transmission of back-stage management center, and sends information to backstage administrative center, such as, when the judged result of judge module 22 is when corresponding parking stall having vehicle, sends the occupied notice in parking stall to backstage administrative center; After receiving the information of vehicles or owner information that car-mounted device sends, send information of vehicles or owner information to backstage administrative center, and parking space information.Further, in order to control power consumption, under original state, radio-frequency communication module 26 is closed, and is that when corresponding parking stall having vehicle, judge module 22 triggers radio-frequency communication module 26 and opens in the judged result of judge module 22.
As shown in Figure 5, be that parking position monitoring device 2 also comprises LF communication module 25, radio-frequency communication module 26 and background communication module 27 with Fig. 2 difference.Preferably, LF communication module 25 is mainly used in sending parking space information and radio communication parameter etc. to car-mounted device, radio-frequency communication module 26 is mainly used in setting up radio-frequency channel according to this radio communication parameter and car-mounted device, and receives the information of vehicles, owner information etc. of car-mounted device transmission.Background communication module 27 is mainly used in the information receiving the transmission of back-stage management center, and sends information to backstage administrative center, such as, when the judged result of judge module 22 is when corresponding parking stall having vehicle, sends the occupied notice in parking stall to backstage administrative center; After radio-frequency communication module 26 receives the information of vehicles or owner information that car-mounted device sends, background communication module 27 sends information of vehicles or owner information to backstage administrative center, and parking space information.Further, in order to control power consumption, under original state, LF communication module 25, radio-frequency communication module 26 are closed, be that when corresponding parking stall having vehicle, judge module 22 triggers LF communication module 25 and opens in the judged result of judge module 22, LF communication module 25 is to after car-mounted device sends parking space information and radio communication parameter, trigger radio-frequency communication module 26 to open, radio-frequency communication module 26 opens rear closedown LF communication module 25.
In certain embodiments, LF communication module 25 comprises the second inductive coil, for the 3rd low frequency signal launching the second low frequency signal to car-mounted device and/or the car-mounted device that is coupled sends.LF communication module 25, except comprising this inductive coil, can also comprise secondary signal processing module, is mainly used in generation second low frequency signal and/or resolves the 3rd low frequency signal.
In certain embodiments, the inductive coil in low frequency detection module 21 and LF communication module 25 is same inductive coil.Namely above-mentioned first inductive coil and the second inductive coil are same inductive coil.The first low frequency signal of the sending during power system operation of low frequency detection module 21 by this inductive coil coupling vehicle; LF communication module 25 sends the second low frequency signal by this inductive coil to car-mounted device, and/or by the 3rd low frequency signal that sends of this inductive coil coupling car-mounted device.
In certain embodiments, the frequency of operation of LF communication module 25 is not less than 100Hz, and is no more than 10MHz, more excellent, is not less than 100Hz, and is no more than 300kHz.More excellent, be 125kHz.
The low frequency signal sent during the power system operation of the present invention by vehicle, detect on corresponding parking stall and whether have vehicle, for the scheme that tradition relies on the change of the terrestrial magnetic field magnetic line of force to detect whether to have vehicle, substantially by the magnetic field of the earth change in physical environment, the material of vehicle, the impact of variation of ambient temperature.Improve the accuracy of detection, stability.Further, after detecting there is vehicle corresponding parking stall, parking position monitoring device is also communicated with the car-mounted device of the vehicle on corresponding parking stall by low frequency and/or radio-frequency channel, parking position monitoring device or car-mounted device also send information of vehicles or owner information to backstage administrative center, and parking space information, for back-stage management center, what achieve between parking stall with the vehicle on this parking stall is corresponding, improves management quality.
Above content is in conjunction with concrete embodiment further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (13)
1. vehicle is at a position detecting method, it is characterized in that, according to testing result, the first low frequency signal sent when parking position monitoring device detects the power system operation of vehicle, judges whether corresponding parking stall has vehicle.
2. vehicle as claimed in claim 1 is at position detecting method, it is characterized in that, judge whether corresponding parking stall has vehicle comprise according to testing result: the intensity of the first low frequency signal detected compared with predetermined threshold value, if the intensity of the first low frequency signal is more than or equal to predetermined threshold value, then judged result is that corresponding parking stall has vehicle.
3. vehicle as claimed in claim 2 is at position detecting method, it is characterized in that, the intensity of the first low frequency signal detected also is comprised relatively before with predetermined threshold value: described parking position monitoring device detects on described corresponding parking stall without environment low frequency signal during vehicle; According to the intensity of the environment low frequency signal detected, and preset threshold value described in parameter value calculation of floating.
4. vehicle as claimed in claim 3 is at position detecting method, it is characterized in that, according to the intensity of the environment low frequency signal detected, and also comprise before presetting threshold value described in parameter value calculation of floating: the described corresponding parking stall of described parking position monitoring device detection has the first low frequency signal during different vehicle; Float parameter value according to the intensity of each the first low frequency signal detected and the Strength co-mputation of described environment low frequency signal.
5. the vehicle as described in any one of Claims 1-4, at position detecting method, is characterized in that, if judged result is that corresponding parking stall has vehicle, also comprises: described parking position monitoring device is communicated with the car-mounted device of described vehicle by low frequency and/or radio-frequency channel; And/or described parking position monitoring device and back-stage management center to center communications.
6. vehicle as claimed in claim 5 is at position detecting method, it is characterized in that, described parking position monitoring device to be communicated with the car-mounted device of described vehicle by low frequency and radio-frequency channel and is specially: described parking position monitoring device sends radio communication parameter by the second low frequency signal to car-mounted device; Set up radio-frequency channel according to described radio communication parameter and described car-mounted device, carry out radio communication by described radio-frequency channel and described car-mounted device.
7. a parking position monitoring device, is characterized in that, comprising:
Low frequency detection module, the first low frequency signal sent during for detecting the power system operation of vehicle;
According to the testing result of low frequency signal detection module, judge module, for judging whether corresponding parking stall has vehicle.
8. parking position monitoring device as claimed in claim 7, it is characterized in that, judge module compares with predetermined threshold value specifically for the intensity of the first low frequency signal detected by low frequency detection module, if the intensity of the first low frequency signal is more than or equal to predetermined threshold value, be then judged as that there is vehicle corresponding parking stall.
9. parking position monitoring device as claimed in claim 8, it is characterized in that, low frequency detection module is also for detecting on described corresponding parking stall without environment low frequency signal during vehicle; Described parking position monitoring device also comprises threshold value computing module, for the intensity of environment low frequency signal detected according to low frequency detection module, and presets threshold value described in parameter value calculation of floating.
10. parking position monitoring device as claimed in claim 9, is characterized in that, low frequency detection module is also for detecting the first low frequency signal when described corresponding parking stall having different vehicle; Described parking position monitoring device also comprises floating parameter value calculation module, for there being floating parameter value described in the Strength co-mputation of the intensity of the first low frequency signal detected during different vehicle and described environment low frequency signal on described corresponding parking stall according to low frequency detection module.
11. parking position monitoring devices as described in any one of claim 7 to 10, is characterized in that, also comprise:
LF communication module, for communicating with car-mounted device by low channel;
Radio-frequency communication module, for communicating with car-mounted device by radio-frequency channel;
And/or, background communication module, for back-stage management center to center communications.
12. parking position monitoring devices as claimed in claim 11, is characterized in that, LF communication module is specifically for sending radio communication parameter by the second low frequency signal to car-mounted device; Radio-frequency communication module, specifically for setting up radio-frequency channel according to described radio communication parameter and described car-mounted device, carries out radio communication by described radio-frequency channel and described car-mounted device.
13. parking position monitoring devices as claimed in claim 11, it is characterized in that, low frequency detection module comprises the first inductive coil, the first low frequency signal sent during power system operation for the vehicle that is coupled; Described LF communication module comprises the second inductive coil, for the 3rd low frequency signal launching the second low frequency signal to car-mounted device and/or the car-mounted device that is coupled sends; Described first inductive coil and the second inductive coil are same inductive coil.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106781659A (en) * | 2016-12-21 | 2017-05-31 | 迈锐数据（北京）有限公司 | A kind of parking space state a reference value scaling method and device |
| CN110998689A (en) * | 2017-08-08 | 2020-04-10 | 罗伯特·博世有限公司 | Device for monitoring the occupancy state of a parking space, system having such a device, and method for operating such a device and such a system |
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