CN104658307A - 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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- CN104658307A CN104658307A CN201310577000.3A CN201310577000A CN104658307A CN 104658307 A CN104658307 A CN 104658307A CN 201310577000 A CN201310577000 A CN 201310577000A CN 104658307 A CN104658307 A CN 104658307A
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- G08G1/14—Traffic control systems for road vehicles indicating individual free spaces in parking areas
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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 whether a vehicle exists on the corresponding parking place by at least two ways, and one way is that whether a vehicle exists on the corresponding parking place is detected through detecting a first low-frequency signal sent when a power system of the vehicle operates; and if the vehicle is detected by at least one way, the detection result is that the vehicle exists on the corresponding parking place. Through the above technical scheme, the technical problems that as vehicle in-place detection is carried out by depending on only one way in the prior art, missing detection and error detection are likely to happen can be solved.
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, and vehicle traditional at present detection scheme in place list relies on a kind of mode to detect.Such as only rely on centre position, parking stall and geomagnetism detecting module is set, detect on this parking stall whether have vehicle by the change detecting this Shangdi, parking stall magnetic field magnetic line.A kind of mode of single dependence carries out vehicle detection in place, easily occurs situation that is undetected, false retrieval.
Summary of the invention
The invention provides a kind of vehicle at position detecting method and parking position monitoring arrangement vehicle shutdown system, a kind of mode of single dependence in prior art that solves carries out vehicle detection in place, easily occurs technical matters that is undetected, false retrieval.
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, parking position monitoring device detects on corresponding parking stall whether have vehicle by least two kinds of modes, and wherein a kind of mode is: the first low frequency signal sent during by detecting the power system operation of vehicle detects on corresponding parking stall whether have vehicle; If at least one mode is tested with vehicle, then testing result has vehicle on this corresponding parking stall.
Whether the first low frequency signal sent time further, by detecting the power system operation of vehicle detects on corresponding parking stall has vehicle to comprise: the first low frequency signal sent when parking position monitoring device detects the power system operation of vehicle; The intensity of the first low frequency signal detected is compared with default first threshold value, if the intensity of the first low frequency signal is more than or equal to default first threshold value, is then judged as that there is vehicle corresponding parking stall.
Further, the intensity of the first low frequency signal detected also is comprised relatively before with default first 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 the first threshold value described in the first floating parameter value calculation.
Further, according to the intensity of the environment low frequency signal detected, and also comprise before presetting the first threshold value described in the first floating parameter value calculation: the described corresponding parking stall of described parking position monitoring device detection has the first low frequency signal during different vehicle; The first floating 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, other modes in described at least two kinds of modes are with one or more under type: judge whether this corresponding parking stall has vehicle by the change detecting this Shangdi, corresponding parking stall magnetic field magnetic line; By launching on this corresponding parking stall of infrared detection whether have vehicle; By launching on this corresponding parking stall of ultrasound examination whether have vehicle; Detect on this corresponding parking stall whether have vehicle by camera technique.
Further, the change by detecting this Shangdi, corresponding parking stall magnetic field magnetic line judges whether this corresponding parking stall has vehicle to comprise: parking position monitoring device detects the terrestrial magnetic field on this corresponding parking stall; The intensity of the terrestrial magnetic field detected is compared with default second threshold value, if the intensity of terrestrial magnetic field is more than or equal to default second threshold value, is then judged as that there is vehicle corresponding parking stall.
Further, the intensity of the terrestrial magnetic field detected also is comprised relatively before with default second threshold value: described parking position monitoring device detects on described corresponding parking stall without environment terrestrial magnetic field during vehicle; According to the intensity of the environment terrestrial magnetic field detected, and preset the second threshold value described in the second floating parameter value calculation.
Further, according to the intensity of the environment terrestrial magnetic field detected, and also comprise before presetting the second threshold value described in the second floating parameter value calculation: the described corresponding parking stall of described parking position monitoring device detection has terrestrial magnetic field during different vehicle; The second floating parameter value according to the intensity of each terrestrial magnetic field detected and the Strength co-mputation of described environment terrestrial magnetic field.
Further, if testing result has vehicle on this corresponding parking stall, 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: the first vehicle detection module, for the first low frequency signal sent during power system operation by detection vehicle, detects on corresponding parking stall whether have vehicle; Second vehicle detection module, for detecting on corresponding parking stall whether have vehicle by other means; And judge module, for the testing result according to the first vehicle detection module and the second vehicle detection module, be judged as whether this corresponding parking stall has vehicle, at least one in first vehicle detection module, the second vehicle detection module is tested with vehicle, be then judged as that there is vehicle this corresponding parking stall.
Further, the first vehicle detection module comprises: low frequency detection sub-module, the first low frequency signal sent during for detecting the power system operation of vehicle; First judges submodule, for judging whether corresponding parking stall has vehicle according to the testing result of low frequency detection sub-module.
Further, first judges that submodule compares with default first threshold value specifically for the intensity of the first low frequency signal low frequency detection sub-module detected, if the intensity of the first low frequency signal is more than or equal to default first threshold value, be then judged as that there is vehicle corresponding parking stall.
Further, low frequency detection sub-module is also for detecting on described corresponding parking stall without environment low frequency signal during vehicle; Described first vehicle detection module also comprises the first threshold value computing module, for the intensity of environment low frequency signal detected according to low frequency detection sub-module, and presets first and to float the first threshold value described in parameter value calculation.
Further, low frequency detection sub-module is also for detecting the first low frequency signal when described corresponding parking stall having different vehicle; Described first vehicle detection module also comprises the first floating parameter value calculation module, for there being the first 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 sub-module.
Further, the second vehicle detection module comprises with one or more in lower module:
Geomagnetism detecting module, detects on this corresponding parking stall whether have vehicle for the change by detecting this Shangdi, corresponding parking stall magnetic field magnetic line;
Infrared detection module, for passing through to launch on this corresponding parking stall of infrared detection whether have vehicle;
Ultrasound examination module, for passing through to launch on this corresponding parking stall of ultrasound examination whether have vehicle;
Camera detection module, for detecting on this corresponding parking stall whether have vehicle by camera technique.
Further, geomagnetism detecting module comprises: geomagnetism detecting submodule, for detecting the terrestrial magnetic field on this corresponding parking stall; Second judges submodule, and the intensity for the terrestrial magnetic field detected by geomagnetism detecting submodule compares with default second threshold value, if the intensity of terrestrial magnetic field is more than or equal to default second threshold value, is then judged as that there is vehicle corresponding parking stall.
Further, geomagnetism detecting submodule is also for detecting on this corresponding parking stall without environment terrestrial magnetic field during vehicle; Geomagnetism detecting module also comprises the second threshold value computing module, for the intensity of the environment terrestrial magnetic field that base area Magnetic testi submodule detects, and presets the second threshold value described in the second floating parameter value calculation.
Further, geomagnetism detecting submodule is also for detecting terrestrial magnetic field when this corresponding parking stall having different vehicle; Geomagnetism detecting module also comprises second and to float parameter value calculation module, the second floating parameter value described in the intensity of each terrestrial magnetic field detected for base area Magnetic testi submodule and the Strength co-mputation of described environment terrestrial magnetic field.
Further, low frequency detection sub-module comprises the first inductive coil, the first low frequency signal sent during power system operation for the vehicle that is coupled; Described geomagnetism detecting submodule comprises the second inductive coil, for detecting the terrestrial magnetic field on this corresponding parking stall; Described first inductive coil and the second inductive coil are same inductive coil.
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.
Vehicle provided by the invention is at position detecting method, parking position monitoring device and vehicle parking system, and parking position monitoring device detects on corresponding parking stall whether have vehicle by least two kinds of modes; If at least one mode is tested with vehicle, then testing result has vehicle on this corresponding parking stall.Carry out, for the scheme of vehicle detection in place, reducing probability that is undetected, false retrieval relative to a kind of mode of single dependence in prior art; Simultaneously, wherein a kind of mode is: the first low frequency signal sent during by detecting the power system operation of vehicle detects on corresponding parking stall whether have vehicle, which is different from geomagnetism detecting module and relies on the change of the terrestrial magnetic field magnetic line of force to detect the scheme whether having vehicle, which is not substantially by the magnetic field of the earth change in physical environment, the material of vehicle, the impact of variation of ambient temperature, and accuracy, the stability of detection are higher.
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:
S101, parking position monitoring device detect on corresponding parking stall whether have vehicle by least two kinds of modes, and wherein a kind of mode is: the first low frequency signal sent during by detecting the power system operation of vehicle detects on corresponding parking stall whether have 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.
Whether the first low frequency signal sent time wherein, by detecting the power system operation of vehicle detects on corresponding parking stall has vehicle to comprise: the first low frequency signal sent when parking position monitoring device detects the power system operation of vehicle; Judge whether corresponding parking stall has vehicle according to testing result.
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 default first threshold value, if the intensity of the first low frequency signal is more than or equal to default first 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 default first threshold value, if the intensity of the first low frequency signal is more than or equal to default first 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 default first 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; Compared with first threshold by statistical value in this default measurement period, if be more than or equal to this first threshold, then judged result is that corresponding parking stall has vehicle.
In certain embodiments, the first 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 first and to float the first threshold value described in parameter value calculation.This corresponding parking stall is measured data without the intensity of the environment low frequency signal detected during vehicle.First threshold value draws without measured data during vehicle and the default first floating parameter value calculation 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 the first threshold value described in the first floating parameter value calculation, also comprise: judge whether the intensity of the environment low frequency signal detected meets the demands (such as, judge whether it is greater than Second Threshold, if be greater than Second Threshold, 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 the first threshold value described in the default first floating parameter value calculation.
In certain embodiments, according to the intensity of the environment low frequency signal detected, and described in the default first floating parameter value calculation, the first threshold value is specially: described first threshold value equals the intensity of environment low frequency signal and presets the first floating parameter value sum.
In certain embodiments, first parameter value that floats 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; The first floating 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 first 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, according to the intensity of each the first low frequency signal detected and the Strength co-mputation of described environment low frequency signal, the first floating parameter value is specially: the mean value of the difference that the intensity that the intensity that the described first 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 the described first floating parameter value equals the intensity of each the first low frequency signal deducts environment low frequency signal obtains.
Other modes in step S101 at least two kinds of modes are including, but not limited to following cited one or more: detect on this corresponding parking stall whether have vehicle by the change detecting this Shangdi, corresponding parking stall magnetic field magnetic line; By launching on this corresponding parking stall of infrared detection whether have vehicle; By launching on this corresponding parking stall of ultrasound examination whether have vehicle; Detect on this corresponding parking stall whether have vehicle by camera technique.
Wherein, the change by detecting this Shangdi, corresponding parking stall magnetic field magnetic line detect whether this corresponding parking stall have the mode of vehicle including, but not limited to: parking position monitoring device detects the terrestrial magnetic field on this corresponding parking stall; The intensity of the terrestrial magnetic field detected is compared with default second threshold value, if the intensity of terrestrial magnetic field is more than or equal to default second threshold value, is then judged as that there is vehicle corresponding parking stall.
In certain embodiments, the second threshold value can be determined in the following manner: parking position monitoring device detects on this corresponding parking stall without environment terrestrial magnetic field during vehicle; Again according to the intensity of the environment terrestrial magnetic field 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 second and to float the second threshold value described in parameter value calculation.This corresponding parking stall is measured data without the intensity of the environment terrestrial magnetic field detected during vehicle.Second threshold value draws without measured data during vehicle and the default second floating parameter value calculation according on this corresponding parking stall.Preferably, in the process of the intensity of testing environment terrestrial magnetic field, 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 terrestrial magnetic field during vehicle, according to the intensity of the environment terrestrial magnetic field detected, before presetting the second threshold value described in the second floating parameter value calculation, also comprise: judge whether the intensity of the environment terrestrial magnetic field detected meets the demands (such as, judge whether it is greater than the 3rd threshold value, if be greater than the 3rd threshold value, then illustrate that environment terrestrial magnetic field 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 terrestrial magnetic field detected, with the second threshold value described in the default second floating parameter value calculation.
In certain embodiments, according to the intensity of the environment terrestrial magnetic field detected, and described in the default second floating parameter value calculation, the second threshold value is specially: described second threshold value equals the intensity of environment terrestrial magnetic field and presets the second floating parameter value sum.
In certain embodiments, second parameter value that floats can be determined in the following manner: parking position monitoring device detects terrestrial magnetic field when this corresponding parking stall having different vehicle; The second floating parameter value according to the intensity of each terrestrial magnetic field detected and the Strength co-mputation of described environment terrestrial magnetic field.The intensity of terrestrial magnetic field when this corresponding parking stall having a different vehicle is measured data, and second 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, according to the intensity of each terrestrial magnetic field detected and the Strength co-mputation of described environment terrestrial magnetic field, the second floating parameter value is specially: the mean value of the difference that the intensity that the intensity that the described second floating parameter value equals each terrestrial magnetic field deducts environment terrestrial magnetic field obtains; Or, the difference that the intensity that the mean value that the described second floating parameter value equals the intensity of each terrestrial magnetic field deducts environment terrestrial magnetic field obtains.
Whether have at least one mode to detect in S102, parking position monitoring device determining step S101 and there is vehicle this corresponding parking stall, if so, this time testing result for there is vehicle this corresponding parking stall, then can be selected to enter step S103, if not, can select to get back to step S101.
S103, parking position monitoring device are 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 be no more than 10MHz, restraining mass between car-mounted device and parking position monitoring device or barrier can be reduced like this on the impact of communication, between stream oriented device when unfixed, the variform barrier in location, stable communication can be realized, can realize again apart from controlled.Be particularly useful in road parking scene, between car-mounted device and parking position monitoring device, there is huge metal shelter, and the relative position residing for shelter not fixing situation.More excellent, 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.In step S103 parking position monitoring device and back-stage management center to center communications including, but not limited to: 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: the first vehicle detection module 21, for the first low frequency signal sent during by detecting the power system operation of vehicle, detects on corresponding parking stall whether have vehicle; Second vehicle detection module 22, for detecting on corresponding parking stall whether have vehicle by other means; And judge module 23, for the testing result according to the first vehicle detection module 21 and the second vehicle detection module 22, be judged as whether this corresponding parking stall has vehicle, concrete, if at least one in the first vehicle detection module 21, second vehicle detection module 22 is tested with vehicle, be then judged as that there is vehicle this corresponding parking stall.
In certain embodiments, the first vehicle detection module 21 comprises: low frequency detection sub-module 211, the first low frequency signal sent during for detecting the power system operation of vehicle; And first judges submodule 212, 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 sub-module 211 comprises: the first inductive coil, the first low frequency signal sent during power system operation for the vehicle that is coupled.
In certain embodiments, first judges that submodule 212 compares with default first threshold value specifically for the intensity of the first low frequency signal low frequency detection sub-module 211 detected, if the intensity of the first low frequency signal is more than or equal to default first threshold value, be then judged as that there is vehicle corresponding parking stall.Including, but not limited to: first judge submodule 212 in real time by low frequency detection sub-module 211 current detection to the intensity of the first low frequency signal compare with default first threshold value, if the intensity of the first low frequency signal is more than or equal to default first threshold value, be then judged as that there is vehicle corresponding parking stall; Or, first judges according to the intensity of the first low frequency signal detected in default measurement period, submodule 212 judges whether corresponding parking stall has vehicle, concrete: first judges that submodule 212 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 sub-module 211 current detection to the intensity of the first low frequency signal compare with default first 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 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; Low frequency detection sub-module 211 also comprises the first signal processing module, after carrying out presetting process to the first low frequency signal of the first inductive coil coupling, transfer to the first judgement submodule 212.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 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 sub-module 211 is also for detecting on corresponding parking stall without environment low frequency signal during vehicle; First vehicle detection module 21 also comprises the first threshold value computing module 213 further, for the intensity of environment low frequency signal detected according to low frequency detection sub-module 211, and presets first and to float the first threshold value described in parameter value calculation.
In certain embodiments, low frequency detection sub-module 211 is also for detecting the first low frequency signal when corresponding parking stall having different vehicle; First vehicle detection module 21 also comprises the first floating parameter value calculation module 214 further, for there being the first 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 sub-module 211.
In certain embodiments, the second vehicle detection module 22 comprises with one or more in lower module: geomagnetism detecting module 221, detects on this corresponding parking stall whether have vehicle for the change by detecting this Shangdi, corresponding parking stall magnetic field magnetic line; Infrared detection module 222, for passing through to launch on this corresponding parking stall of infrared detection whether have vehicle; Ultrasound examination module 223, for passing through to launch on this corresponding parking stall of ultrasound examination whether have vehicle; Camera detection module 224, for detecting on this corresponding parking stall whether have vehicle by camera technique.
In certain embodiments, geomagnetism detecting module 221 comprises: geomagnetism detecting submodule 2211, for detecting the terrestrial magnetic field on this corresponding parking stall; And second judges submodule 2212, the intensity for the terrestrial magnetic field detected by geomagnetism detecting submodule 2211 compares with default second threshold value, if the intensity of terrestrial magnetic field is more than or equal to default second threshold value, is then judged as that there is vehicle corresponding parking stall.
In certain embodiments, geomagnetism detecting submodule 2211 is also for detecting on described corresponding parking stall without environment terrestrial magnetic field during vehicle; Geomagnetism detecting module 221 also comprises the second threshold value computing module 2213, for the intensity of the environment terrestrial magnetic field that base area Magnetic testi submodule 2211 detects, and presets the second threshold value described in the second floating parameter value calculation.
In certain embodiments, geomagnetism detecting submodule 2211 is also for detecting terrestrial magnetic field when described corresponding parking stall having different vehicle; Geomagnetism detecting module 221 also comprises second and to float parameter value calculation module 2214, the second floating parameter value described in the intensity of each terrestrial magnetic field detected for base area Magnetic testi submodule 2211 and the Strength co-mputation of described environment terrestrial magnetic field.
In certain embodiments, above-mentioned judge module 23, first judges that submodule 212 and/or second judges that submodule 2212 is as same module.
In certain embodiments, geomagnetism detecting submodule 2211 comprises the second inductive coil, for detecting the terrestrial magnetic field on this corresponding parking stall; In certain embodiments, the first inductive coil and the second inductive coil are same inductive coil.
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 used for being communicated with car-mounted device by low channel; Radio-frequency communication module is used for being communicated with car-mounted device by radio-frequency channel; 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 24 and background communication module 26 with Fig. 2 difference.LF communication module 24 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 26 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 23 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 24 is closed, and is that when corresponding parking stall having vehicle, judge module 23 triggers LF communication module 24 and opens in the judged result of judge module 23.
As shown in Figure 4, with Fig. 2 difference be, parking position monitoring device 2 also comprises: radio-frequency communication module 25 and background communication module 26.Radio-frequency 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 26 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 23 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 25 is closed, and is that when corresponding parking stall having vehicle, judge module 23 triggers radio-frequency communication module 25 and opens in the judged result of judge module 23.
As shown in Figure 5, be that parking position monitoring device 2 also comprises LF communication module 24, radio-frequency communication module 25 and background communication module 26 with Fig. 2 difference.Preferably, LF communication module 24 is mainly used in sending parking space information and radio communication parameter etc. to car-mounted device, radio-frequency communication module 25 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 26 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 23 is when corresponding parking stall having vehicle, sends the occupied notice in parking stall to backstage administrative center; After radio-frequency communication module 25 receives the information of vehicles or owner information that car-mounted device sends, background communication module 26 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 24, radio-frequency communication module 25 are closed, be that when corresponding parking stall having vehicle, judge module 23 triggers LF communication module 24 and opens in the judged result of judge module 23, LF communication module 24 is to after car-mounted device sends parking space information and radio communication parameter, trigger radio-frequency communication module 25 to open, radio-frequency communication module 25 opens rear closedown LF communication module 24.
In certain embodiments, LF communication module 24 comprises the 3rd inductive coil, for sending the second low frequency signal to car-mounted device, and/or the 3rd low frequency signal that coupling car-mounted device sends.LF communication module 24, except comprising this inductive coil, also can 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, inductive coil in low frequency detection sub-module 211, geomagnetism detecting submodule 2211 and/or LF communication module 24 is same inductive coil, and namely above-mentioned first inductive coil, the second inductive coil and/or the 3rd inductive coil are same inductive coil.The first low frequency signal of the sending during power system operation of low frequency detection sub-module 211 by this inductive coil coupling vehicle; Geomagnetism detecting submodule 2211 detects terrestrial magnetic field by this inductive coil; LF communication module 24 sends the second low frequency signal by this inductive coil to car-mounted device, and/or the 3rd low frequency signal that coupling car-mounted device sends.
In certain embodiments, preferably, the frequency of operation of LF communication module 24 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.
Parking position monitoring device of the present invention detects on corresponding parking stall whether have vehicle by least two kinds of modes, carries out, for the scheme of vehicle detection in place, reducing probability that is undetected, false retrieval relative to a kind of mode of single dependence in prior art; And, the low frequency signal wherein sent during the power system operation of a kind of mode by vehicle to detect on corresponding parking stall whether 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 (22)
1. a vehicle is at position detecting method, it is characterized in that, parking position monitoring device detects on corresponding parking stall whether have vehicle by least two kinds of modes, and wherein a kind of mode is: the first low frequency signal sent during by detecting the power system operation of vehicle detects on corresponding parking stall whether have vehicle; If at least one mode is tested with vehicle, then testing result has vehicle on this corresponding parking stall.
2. vehicle as claimed in claim 1 is at position detecting method, it is characterized in that, whether detected on corresponding parking stall by the first low frequency signal sent during the power system operation that detects vehicle has vehicle to comprise:
The first low frequency signal that parking position monitoring device sends when detecting the power system operation of vehicle;
The intensity of the first low frequency signal detected is compared with default first threshold value, if the intensity of the first low frequency signal is more than or equal to default first threshold value, is then judged as that there is vehicle corresponding parking stall.
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 default first 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 the first threshold value described in the first floating parameter value calculation.
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 the first threshold value described in the first floating parameter value calculation: the described corresponding parking stall of described parking position monitoring device detection has the first low frequency signal during different vehicle; The first floating 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. vehicle as claimed in claim 1 is at position detecting method, it is characterized in that, other modes in described at least two kinds of modes are with one or more under type: judge whether this corresponding parking stall has vehicle by the change detecting this Shangdi, corresponding parking stall magnetic field magnetic line; By launching on this corresponding parking stall of infrared detection whether have vehicle; By launching on this corresponding parking stall of ultrasound examination whether have vehicle; Detect on this corresponding parking stall whether have vehicle by camera technique.
6. vehicle as claimed in claim 5 is at position detecting method, and whether it is characterized in that, being detected on this corresponding parking stall by the change detecting this Shangdi, corresponding parking stall magnetic field magnetic line has vehicle to comprise:
Parking position monitoring device detects the terrestrial magnetic field on this corresponding parking stall;
The intensity of the terrestrial magnetic field detected is compared with default second threshold value, if the intensity of terrestrial magnetic field is more than or equal to default second threshold value, is then judged as that there is vehicle corresponding parking stall.
7. vehicle as claimed in claim 6 is at position detecting method, it is characterized in that, the intensity of the terrestrial magnetic field detected also is comprised relatively before with default second threshold value: described parking position monitoring device detects on described corresponding parking stall without environment terrestrial magnetic field during vehicle; According to the intensity of the environment terrestrial magnetic field detected, and preset the second threshold value described in the second floating parameter value calculation.
8. vehicle as claimed in claim 7 is at position detecting method, it is characterized in that, according to the intensity of the environment terrestrial magnetic field detected, and also comprise before presetting the second threshold value described in the second floating parameter value calculation: the described corresponding parking stall of described parking position monitoring device detection has terrestrial magnetic field during different vehicle; The second floating parameter value according to the intensity of each terrestrial magnetic field detected and the Strength co-mputation of described environment terrestrial magnetic field.
9. the vehicle as described in any one of claim 1 to 8, at position detecting method, is characterized in that, if testing result has vehicle on this corresponding parking stall, 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.
10. vehicle as claimed in claim 9 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.
11. 1 kinds of parking position monitoring devices, is characterized in that, comprising:
First vehicle detection module, for the first low frequency signal sent during by detecting the power system operation of vehicle, detects on corresponding parking stall whether have vehicle;
Second vehicle detection module, for detecting on corresponding parking stall whether have vehicle by other means;
Judge module, for the testing result according to the first vehicle detection module and the second vehicle detection module, be judged as whether this corresponding parking stall has vehicle, at least one in the first vehicle detection module, the second vehicle detection module is tested with vehicle, be then judged as that there is vehicle this corresponding parking stall.
12. parking position monitoring devices as claimed in claim 11, it is characterized in that, the first vehicle detection module comprises:
Low frequency detection sub-module, the first low frequency signal sent during for detecting the power system operation of vehicle;
First judges submodule, for judging whether corresponding parking stall has vehicle according to the testing result of low frequency detection sub-module.
13. parking position monitoring devices as claimed in claim 12, it is characterized in that, first judges that submodule compares with default first threshold value specifically for the intensity of the first low frequency signal low frequency detection sub-module detected, if the intensity of the first low frequency signal is more than or equal to default first threshold value, be then judged as that there is vehicle corresponding parking stall.
14. parking position monitoring devices as claimed in claim 13, is characterized in that, low frequency detection sub-module is also for detecting on described corresponding parking stall without environment low frequency signal during vehicle; Described first vehicle detection module also comprises the first threshold value computing module, for the intensity of environment low frequency signal detected according to low frequency detection sub-module, and presets first and to float the first threshold value described in parameter value calculation.
15. parking position monitoring devices as claimed in claim 14, is characterized in that, low frequency detection sub-module is also for detecting the first low frequency signal when described corresponding parking stall having different vehicle; Described first vehicle detection module also comprises the first floating parameter value calculation module, for there being the first 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 sub-module.
16. parking position monitoring devices as claimed in claim 12, it is characterized in that, the second vehicle detection module comprises with one or more in lower module:
Geomagnetism detecting module, detects on this corresponding parking stall whether have vehicle for the change by detecting this Shangdi, corresponding parking stall magnetic field magnetic line;
Infrared detection module, for passing through to launch on this corresponding parking stall of infrared detection whether have vehicle;
Ultrasound examination module, for passing through to launch on this corresponding parking stall of ultrasound examination whether have vehicle;
Camera detection module, for detecting on this corresponding parking stall whether have vehicle by camera technique.
17. parking position monitoring devices as claimed in claim 16, it is characterized in that, geomagnetism detecting module comprises:
Geomagnetism detecting submodule, for detecting the terrestrial magnetic field on this corresponding parking stall;
Second judges submodule, and the intensity for the terrestrial magnetic field detected by geomagnetism detecting submodule compares with default second threshold value, if the intensity of terrestrial magnetic field is more than or equal to default second threshold value, is then judged as that there is vehicle corresponding parking stall.
18. parking position monitoring devices as claimed in claim 17, is characterized in that, geomagnetism detecting submodule is also for detecting on this corresponding parking stall without environment terrestrial magnetic field during vehicle; Geomagnetism detecting module also comprises the second threshold value computing module, for the intensity of the environment terrestrial magnetic field that base area Magnetic testi submodule detects, and presets the second threshold value described in the second floating parameter value calculation.
19. parking position monitoring devices as claimed in claim 18, is characterized in that, geomagnetism detecting submodule is also for detecting terrestrial magnetic field when this corresponding parking stall having different vehicle; Geomagnetism detecting module also comprises second and to float parameter value calculation module, the second floating parameter value described in the intensity of each terrestrial magnetic field detected for base area Magnetic testi submodule and the Strength co-mputation of described environment terrestrial magnetic field.
20. parking position monitoring devices as claimed in claim 17, it is characterized in that, low frequency detection sub-module comprises the first inductive coil, the first low frequency signal sent during power system operation for the vehicle that is coupled; Described geomagnetism detecting submodule comprises the second inductive coil, for detecting the terrestrial magnetic field on this corresponding parking stall; Described first inductive coil and the second inductive coil are same inductive coil.
21. parking position monitoring devices as described in any one of claim 11 to 20, 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.
22. parking position monitoring devices as claimed in claim 20, 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.
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