CN207123945U - A kind of detection device of parking space state and the detecting system of parking space state - Google Patents
A kind of detection device of parking space state and the detecting system of parking space state Download PDFInfo
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- CN207123945U CN207123945U CN201720875806.4U CN201720875806U CN207123945U CN 207123945 U CN207123945 U CN 207123945U CN 201720875806 U CN201720875806 U CN 201720875806U CN 207123945 U CN207123945 U CN 207123945U
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Abstract
The utility model provides a kind of detection device of parking space state and the detecting system of parking space state, including：It is arranged on the geomagnetic sensor and microwave detecting device in parking stall to be detected and being connected with each other；Geomagnetic sensor, for when detecting that the earth magnetism magnetic force parameter in parking stall region to be detected changes, generating drive signal and sending to microwave detecting device；Microwave detecting device, for receiving drive signal, the microwave signal of at least one frequency range is launched according to drive signal and receives the echo data returned, according to echo data, parking stall to be detected parking space state corresponding to Basic wave data and setting parking space state change threshold, determine the parking space state of parking stall to be detected situation of change and parking stall to be detected change after parking space state.Changes of magnetic field, the change of vehicle translational speed and the external environment that the utility model is not easy near by parking stall are influenceed, and are improved the degree of accuracy of testing result, be ensure that the low-power consumption of whole detection device, and cost is low.
Description
Technical field
Wagon detector technical field is the utility model is related to, in particular to a kind of detection device of parking space state
And the detecting system of parking space state.
Background technology
As the improvement of people's living standards, the rapid growth of automobile quantity, in terms of meeting user's trip, passes through car
Position state inspection can be with quick detection free time parking stall, to meet the needs of user is quickly stopped.
The parking space state detection method of correlation technique, mainly parking stall surrounding magnetic field is changed using magnetoresistive transducer and carried out
Detection.But for above-mentioned magnetoresistive transducer, either Roadside Parking position or Parking position, the occupancy situation of parking stall
Frequently change all without producing.Parking stall is persistently taken sometimes, sometimes also can continuous idle.And in this case, car
Magnetic field near position, often by drift is produced the reason for external environment, so that magnetoresistive transducer detects the change in magnetic field
Change, produce flase drop problem.
Also, when vehicle stops leaving parking stall into parking stall or vehicle, the speed of automobile is often relatively slow, therefore, near parking stall
Changes of magnetic field it is also corresponding slower.Therefore, parking space state is detected using magnetoresistive transducer, be not appropriate for parking lot or
This application scenarios of Roadside Parking, so as to cause its testing result degree of accuracy to parking space state poor.
Utility model content
In view of this, the purpose of the utility model embodiment is the detection device and parking stall shape for providing a kind of parking space state
The detecting system of state, it is detected using geomagnetic sensor assisted microwave synthesis detection means to parking space state, is ensureing to reduce inspection
The power consumption of measurement equipment and it is cost-effective on the premise of, improve the degree of accuracy of testing result.
In a first aspect, the utility model embodiment provides a kind of detection device of parking space state, including：Geomagnetic sensor
And microwave detecting device；The geomagnetic sensor and the microwave detecting device are arranged in parking stall to be detected；
The geomagnetic sensor electrically connects with the microwave detecting device, for detecting in the parking stall region to be detected
Earth magnetism magnetic force parameter, when detecting that the earth magnetism magnetic force parameter changes, drive signal is generated, and by the drive signal
Send to the microwave detecting device；
The microwave detecting device, for receiving the drive signal, at least one frequency is launched according to the drive signal
The microwave signal of section and the echo data for receiving return, according to the echo data, the parking space state of the parking stall to be detected
Corresponding Basic wave data and setting parking space state change threshold, determine the change of the parking space state of the parking stall to be detected
Parking space state after situation and parking stall to be detected change.
With reference in a first aspect, the utility model embodiment provides the first possible embodiment of first aspect, its
In, the microwave detecting device includes：Controller and microwave circuit；
The controller is connected with the geomagnetic sensor, the drive signal sent for receiving the geomagnetic sensor,
Control signal for controlling the microwave circuit to work is generated according to the drive signal, the control signal is sent to institute
State microwave circuit；
The microwave circuit, for the control signal according to reception, launch the microwave signal of at least one frequency range with
And the echo data returned is received, the echo data of reception is sent to the controller；
The controller is additionally operable to according to the echo data that receives, judge the echo data with it is described to be detected
Whether the difference of Basic wave data corresponding to the parking space state of parking stall is more than setting parking space state change threshold, if so, according to
The parking space state of the parking stall to be detected and the echo data, determine the parking space state after the parking stall change to be detected；Its
In, the Basic wave data include：Without car state Basic wave data and parking state Basic wave data.
With reference to the first possible embodiment of first aspect, the utility model embodiment provides the of first aspect
Two kinds of possible embodiments, wherein, the detection device of described parking space state, in addition to：Digital analog converter and analog-to-digital conversion
Device；
The controller electrically connects with the analog-digital converter, specifically for being generated according to the drive signal for controlling
The control data signal of the microwave circuit work, the control data signal is sent to the digital analog converter；
The digital analog converter electrically connects with the microwave circuit, for receiving the control data signal, by the control
Data signal processed is converted to control analog signal, and the control analog signal is sent to the microwave circuit；
The microwave circuit also electrically connects with the analog-digital converter, specifically for receiving the control analog signal, root
Launch the microwave signal of at least one frequency range according to the control analog signal and receive the analogue echoes signal returned, will receive
The analogue echoes signal send to the analog-digital converter；
The analog-digital converter, for receiving the analogue echoes signal, the analogue echoes signal is converted into echo
Data signal, and the echo data signal is sent to the controller.
With reference to second of possible embodiment of first aspect, the utility model embodiment provides the of first aspect
Three kinds of possible embodiments, wherein, the detection device of described parking space state, in addition to：First amplifier and/or second put
Big device；
The digital analog converter electrically connects with first amplifier, specifically for by it is described control analog signal send to
First amplifier；
First amplifier electrically connects with the microwave circuit, for receiving the control analog signal, by the control
Analog signal processed is amplified processing, will be amplified analog signal and sends to the microwave circuit；
And/or the microwave circuit electrically connects with second amplifier, for receiving the amplified analog signal, root
Launch the microwave signal of at least one frequency range according to the amplified analog signal and receive the analogue echoes signal returned, will receive
The analogue echoes signal send to second amplifier；
Second amplifier electrically connects with the analog-digital converter, for receiving the analogue echoes signal, to described
Analogue echoes signal is amplified processing, and obtained amplification analogue echoes signal is sent to the analog-digital converter.
With reference to the third possible embodiment of first aspect, the utility model embodiment provides the of first aspect
Four kinds of possible embodiments, wherein, the detection device of described parking space state, in addition to：Power module；
The power module respectively with the controller, the microwave circuit, first amplifier and/or described second
Amplifier electrically connects, for for the controller, the microwave circuit, first amplifier and/or second amplifier
Power supply.
With reference to the 4th kind of possible embodiment of first aspect, the utility model embodiment provides the of first aspect
Five kinds of possible embodiments, wherein, the detection device of described parking space state, in addition to power supply circuit；
The power module electrically connects with the power supply circuit, the power supply circuit and first amplifier and/or institute
The connection of the second amplifier is stated, for being that first amplifier and/or second amplifier are powered by the power supply circuit；
The controller also electrically connects with the power supply circuit, for controlling the break-make of the power supply circuit, to control
The power module is the power supply of first amplifier and/or second amplifier.
With reference to the 5th kind of possible embodiment of first aspect, the utility model embodiment provides the of first aspect
Six kinds of possible embodiments, wherein, the power supply circuit includes：Power switching module, the first low pressure difference linear voltage regulator and
Controlling switch；
The power switching module is connected with the power module, for the electricity for the magnitude of voltage for providing the power module
The electric energy for the magnitude of voltage for matching first amplifier and/or second amplifier can be converted to；
The low pressure difference linear voltage regulator electrically connects with the power switching module, for reducing the power switching module
For the low-frequency noise in first amplifier and/or the second amplifier power supply process；
The controller electrically connects with the controlling switch, for controlling the conducting and disconnection of the controlling switch；
The controlling switch is also electric with the low pressure difference linear voltage regulator, the first amplifier and/or the second amplifier respectively
Connection, in conducting, being that first amplifier and/or the second amplifier are powered；And disconnect when, stop for
First amplifier and/or the power supply of the second amplifier.
With reference to the 4th kind of possible embodiment of first aspect, the utility model embodiment provides the of first aspect
Seven kinds of possible embodiments, wherein, the detection device of described parking space state, in addition to：Second low pressure difference linear voltage regulator
With the 3rd low pressure difference linear voltage regulator；Second low pressure difference linear voltage regulator respectively with the power module with and the microwave
Circuit electrically connects；3rd low pressure difference linear voltage regulator electrically connects with the power module and the controller respectively；
The power module, for being powered for the microwave circuit and the controller；Second low pressure difference linearity is steady
Depressor, for reducing the low-frequency noise during the power module is powered for the microwave circuit；3rd low pressure
Difference linear constant voltage regulator, for reducing the low-frequency noise during the power module is powered for the controller.
With reference to the first possible embodiment of first aspect, the utility model embodiment provides the of first aspect
Eight kinds of possible embodiments, wherein, the detection device of described parking space state, in addition to communication module；The communication module
Electrically connected with the controller, the communication module is additionally operable to be connected with upper end equipment communication, for receiving the controller hair
The parking space state testing result sent, the testing result is sent to the upper end equipment.
Second aspect, the utility model embodiment additionally provide a kind of detecting system of parking space state, including first aspect
The detection device of described parking space state, in addition to upper end equipment；
The detection device of the parking space state is connected with the upper end equipment communication, for detecting the parking stall of parking stall to be detected
Parking space state after the situation of change of state and parking stall to be detected change, testing result is sent to the upper end equipment；
The upper end equipment, for receiving the testing result, and respond the testing result.
A kind of detection device of parking space state and the detecting system of parking space state that the utility model embodiment provides, are used
The geomagnetic sensor and microwave detecting device being arranged in parking stall to be detected；Whether parking space state is detected by microwave detecting device
Parking space state after changing and changing, and, the startup of control microwave detecting device is aided in by geomagnetic sensor；With
Parking space state is detected using geomagnetic sensor in the prior art, the obtained testing result degree of accuracy is poor to be compared, its profit
Parking space state is detected with geomagnetic sensor assisted microwave synthesis detection means, reduces and opens microwave detecting device in real time to inspection
The power consumption of measurement equipment, cost is saved, meanwhile, do not become when being detected using microwave signal to parking stall by the magnetic field near parking stall
Change, vehicle translational speed changes and the influence of external environment so that the degree of accuracy of testing result is higher.
To enable above-mentioned purpose of the present utility model, feature and advantage to become apparent, preferred embodiment cited below particularly, and
Accompanying drawing appended by cooperation, is described in detail below.
Brief description of the drawings
, below will be to required use in embodiment in order to illustrate more clearly of the technical scheme of the utility model embodiment
Accompanying drawing be briefly described, it will be appreciated that the following drawings illustrate only some embodiments of the present utility model, therefore should not be by
Regard the restriction to scope as, for those of ordinary skill in the art, on the premise of not paying creative work, may be used also
To obtain other related accompanying drawings according to these accompanying drawings.
Fig. 1 shows a kind of flow chart of the detection device for parking space state that the utility model embodiment is provided.
Fig. 2 shows microwave detecting device in the detection device of parking space state that the utility model embodiment is provided a kind of
Structural representation.
Fig. 3 shows that a kind of digital analog converter DA and analog-digital converter AD that the utility model embodiment is provided are integrated in
The structural representation of microwave detecting device in controller.
Fig. 4 shows that another digital analog converter DA and analog-digital converter AD that the utility model embodiment is provided are integrated
The structural representation of microwave detecting device in the controller；The voltage of section components in microwave detecting device is shown in Fig. 4
Value.
Icon：10th, geomagnetic sensor；20th, microwave detecting device；30th, upper end equipment；201st, controller；202nd, microwave electricity
Road；203rd, power module；204th, power supply circuit；205th, communication module；206th, controlling switch；A, the first amplifier；B, second put
Big device；DC-DC, power switching module；LD0, the first low pressure difference linear voltage regulator；LD0A, the second low pressure difference linear voltage regulator；
LD0B, the 3rd low pressure difference linear voltage regulator；DA, digital analog converter；AD, analog-digital converter.
Embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Accompanying drawing in type embodiment, the technical scheme in the embodiment of the utility model is clearly and completely described, it is clear that described
Embodiment be only the utility model part of the embodiment, rather than whole embodiment.Generally here described in accompanying drawing
It can be configured with the component of the utility model embodiment shown with a variety of to arrange and design.Therefore, below to
The detailed description of the embodiment of the present utility model provided in accompanying drawing is not intended to limit claimed model of the present utility model
Enclose, but be merely representative of selected embodiment of the present utility model.Based on embodiment of the present utility model, those skilled in the art exist
The every other embodiment obtained on the premise of not making creative work, belong to the scope of the utility model protection.
In view of utilizing magnetoresistive transducer to detect parking space state in correlation technique, easily produced by the influencing factor of external environment
Raw drift, so that magnetoresistive transducer is produced sensor flase drop problem and examined using magnetoresistive transducer to parking space state
Survey, this application scenarios of parking lot or Roadside Parking are not appropriate for, so as to cause its testing result to parking space state accurate
Spend poor.Based on this, the utility model embodiment provides a kind of detection device of parking space state and the detection system of parking space state
System, is described below by embodiment.
The utility model embodiment provides a kind of detection device of parking space state, with reference to figure 1, including：Geomagnetic sensor
10 and microwave detecting device 20；Geomagnetic sensor 10 and microwave detecting device 20 are arranged in parking stall to be detected；
Geomagnetic sensor 10 electrically connects with microwave detecting device 20, for detecting the earth magnetism magnetic force in parking stall region to be detected
Parameter, when detecting that earth magnetism magnetic force parameter changes, drive signal is generated, and drive signal is sent to microwave to detect and filled
Put 20；
Microwave detecting device 20, for receiving drive signal, the microwave that at least one frequency range is launched according to drive signal is believed
Number and receive return echo data, according to echo data, parking stall to be detected parking space state corresponding to Basic wave data
And setting parking space state change threshold, determine situation of change and the parking stall to be detected change of the parking space state of parking stall to be detected
Parking space state afterwards.
In order to solve to carry out detection to parking space state using magnetoresistive transducer in the prior art to have flase drop, and then cause
The problem of testing result degree of accuracy is poor, parking space state is examined using microwave detecting device 20 in the utility model embodiment
Survey, the microwave signal that microwave detecting device 20 can launch multiple gradient frequency ranges detects to parking space state.Meanwhile utilize microwave
Not by the shadow of the changes of magnetic field near parking stall, the change of vehicle translational speed and external environment when signal detects to parking stall
Ring so that the degree of accuracy of testing result is higher simultaneously.Simultaneously, it is contemplated that the power consumption of microwave detecting device 20 itself is higher, generally,
The power consumption height of microwave detecting device 20 is probably in 5V, 60mA power, on the other hand, the utility model embodiment is sensed using earth magnetism
The assisted microwave synthesis detection means 20 of device 10, to reduce the overall power of whole detection device.
Specifically, in the utility model embodiment, start geomagnetic sensor 10 in real time, usually make geomagnetic sensor 10 always
Work, and microwave detecting device 20 does not work；When vehicle is close to geomagnetic sensor 10 in parking stall to be detected, geomagnetic sensor 10
Sense that the changes of magnetic field around it (detects the earth magnetism magnetic force parameter in parking stall region to be detected, and detecting earth magnetism magnetic
When force parameter changes), drive signal is generated, and microwave detecting device 20 is started by the drive signal, and utilize microwave
Detection means 20 carries out the detection of parking space state.During microwave detecting device 20 works, due to geomagnetic sensor 10
Power consumption is very small, therefore can open geomagnetic sensor 10 in real time.Wherein, geomagnetic sensor 10 is equivalent to microwave detecting device 20
Switch, only geomagnetic sensor 10 sense a certain degree of earth magnetism magnetic force parameter (i.e. earth magnetism magnetic force parameter exceed setting threshold
During value), such as the changes of magnetic field of 1m Gausses, microwave detecting device 20 is just opened, is detected by the assisted microwave synthesis of geomagnetic sensor 10
The mode of device 20, the power consumption for starting microwave detecting device 20 in real time is greatly reduced, has saved the cost of whole detection device.
In the utility model embodiment, above-mentioned geomagnetic sensor 10 is the axle of low side three or six axle geomagnetic sensors 10, is made
For the starting switch of microwave circuit 202, play a part of saving power consumption to the detection device of whole parking space state.From cheap
Three not high axle geomagnetic sensors 10 of precision, it is therefore an objective to it is required that the power consumption of three axle geomagnetic sensor 10 is low, to ensure whole microwave
Detection means 20 realizes low-power consumption.
Specifically, the method that above-mentioned microwave detecting device 20 carries out parking space state detection is as follows：Microwave detecting device 20 wraps
Include microstrip antenna, the microstrip antenna is preferably provided at the region where parking stall to be detected (in parking stall region i.e. to be detected)；Microwave
Detection means 20 can send microwave signal by the microstrip antenna of setting into parking stall region to be detected, and the microwave signal can be with
It is the microwave signal of frequency range or the microwave signal of multiple gradient frequency ranges；Preferably, in the utility model embodiment
Parking space state is detected using the microwave signal of 8 gradient frequency ranges.
Specifically, one or more microwave signals that microstrip antenna is sent can return after parking stall region to be detected is reached
Echo-signal, echo data is carried in the echo-signal, and microwave detecting device 20 receives the one or more echoes letter returned
Number, the echo data carried in the echo-signal of reception is then extracted, and echo data is handled and (handled including to receiving
Echo data take average or filtering etc.), the last Basic wave according to corresponding to echo data and parking space state after processing
Data, judge whether parking stall to be detected changes.
A kind of detection device of parking space state and the detecting system of parking space state that the utility model embodiment provides, are used
The geomagnetic sensor 10 and microwave detecting device 20 being arranged in parking stall to be detected；Parking stall shape is detected by microwave detecting device 20
State whether change and change after parking space state, and, pass through geomagnetic sensor 10 auxiliary control microwave detecting device
Startup；With being detected in the prior art using geomagnetic sensor 10 to parking space state, the obtained testing result degree of accuracy compared with
Difference is compared, and it is detected using the assisted microwave synthesis detection means 20 of geomagnetic sensor 10 to parking space state, reduces real-time unlatching
Microwave detecting device 20 to the power consumption of detection device, saved cost, meanwhile, when being detected using microwave signal to parking stall not
Influenceed by the changes of magnetic field near parking stall, the change of vehicle translational speed and external environment so that the degree of accuracy of testing result
It is higher.
Further, in the detection device of the parking space state provided with reference to figure 2, the utility model embodiment, microwave detection
Device 20 includes：Controller 201 and microwave circuit 202；
Controller 201 is connected with geomagnetic sensor 10, for receiving the drive signal of the transmission of geomagnetic sensor 10, according to drive
Dynamic signal generation is used for the control signal for controlling microwave circuit 202 to work, and sends control signals to microwave circuit 202；
Microwave circuit 202, for the control signal according to reception, launch microwave signal and the reception of at least one frequency range
The echo data of return, the echo data of reception is sent to controller 201；
Controller 201 is additionally operable to, according to the echo data received, judge the parking stall shape of echo data and parking stall to be detected
Whether the difference of Basic wave data corresponding to state is more than setting parking space state change threshold, if so, according to parking stall to be detected
Parking space state and echo data, determine the parking space state after parking stall change to be detected；Wherein, Basic wave data include：Without car
State Basic wave data and parking state Basic wave data；
Specifically, the parking space state of parking stall to be detected includes microwave without car state and microwave dead ship condition two states；On
State microwave without car state and be corresponding with no car state Basic wave data, above-mentioned microwave dead ship condition is corresponding with parking state Basic wave number
According to.
When parking space state to be detected is microwave without car state, controller 201 is according to without car state Basic wave data and connecing
The echo data of receipts, it is determined that (i.e. echo data and the parking stall shape of parking stall to be detected when current microwave without car state changes
When the difference of Basic wave data corresponding to state is more than setting parking space state change threshold), determine whether the parking stall after change
Whether state is that microwave enters car state；If so, microwave detecting device 20 further determines whether to carry out car state for microwave；If so,
System further determines that parking stall end-state is microwave dead ship condition, or microwave without car state.
When parking space state to be detected is microwave dead ship condition, microwave detecting device 20 is according to parking state Basic wave number
According to the echo data with reception, it is determined that when current microwave without car state changes, the parking stall shape after change is determined whether
State is to maintain microwave dead ship condition, or becomes and turn to microwave without car state.
(Microcontroller Unit, MCU, microcontroller as an alternative embodiment, controller noted above 201
Unit) from the STM32L4 series of low power architecture or the MCU of other low-power consumption series.Selected in the utility model embodiment
With the MCU of STM32L476 models.Controller 201 is after the drive signal of the transmission of geomagnetic sensor 10 is received, according to the drive
Dynamic signal generation staircase waveform, then the staircase waveform is sent to microwave circuit 202, microwave circuit 202 and utilizes a double antenna (use
In sending step signal, one is used to receive the echo-signal returned) two signals are obtained, the two signals obtain through frequency mixer
It is several mV to hundreds of mV signal to intermediate-freuqncy signal amplitude, and the obtained signal is sent to controller 201, controller 201
Handled to this signal, you can judge whether parking stall to be detected changes and determine the parking space state after change.
Wherein, the VT of above-mentioned microwave circuit 202 (i.e. microwave chip) is 3V-9V DC voltages, controller 201
Purpose according to drive signal generation staircase waveform is to meet the demand of the VT of microwave circuit 202.
Wherein, VT is the input signal of microwave chip, and microwave chip produces different frequency using VT
Signal.And VT is the input signal of microwave chip, microwave chip produces the signal of different frequency using VT, i.e.,
Produce the microwave signal of at least one frequency range.
Controller 201 is additionally operable to after the testing result that the microwave circuit 202 is sent is detected, controls microwave circuit
202 close；Wherein, above-mentioned testing result includes：Parking space state letter after information that parking space state does not change and change
Breath.Specifically, making sensing to the earth's magnetic field of change using above-mentioned three axles geomagnetic sensor 10, interrupt notification controller is produced
201, so that controller 201 controls microwave circuit 202 to work, high precision test can be realized by microwave circuit 202.Microwave electricity
After the detection of road 202 finishes, controller 201 controls again closes microwave circuit 202, realizes that geomagnetic sensor 10 detects and sends drive
Signal is moved to control circuit to control the subsequent cycle that microwave circuit 202 works.
In the utility model embodiment, it (is specially microwave that be not limited to reduces microwave detecting device 20 using geomagnetism detecting device
Circuit 202) power consumption the problem of, other low in energy consumption, inexpensive modes can also be selected to make microwave as guiding so as to realize
The discontinuous operation of circuit 202.
Further, with reference to figure 3 and Fig. 4, in the detection device for the parking space state that the utility model embodiment provides, microwave
Detection means 20 also includes communication module 205, and communication module 205 electrically connects with controller 201, also with the upper communication link of end equipment 30
Connect, for receive the transmission of controller 201 parking space state change information and change after parking space state information, and by above-mentioned inspection
Survey result and send supreme end equipment 30.
Specifically, the communication module 205 is using low-power consumption LORA.Specifically, above-mentioned communication module 205 can select it is ready-made
Module ZM470SX-M.The maximum feature of LoRa network technologies is low-power consumption, and the utility model embodiment is protected from the selection of device
The low-power consumption of whole microwave detecting device 20 is demonstrate,proved.Meanwhile LoRa uses spread-spectrum modulation technique, can demodulate making an uproar less than 20dB
Sound, which ensure that high sensitivity and reliable network connection, and use different spreading factor cans to change spread spectrum system
Transmission rate, and variable spreading factor improves the power system capacity of whole network, because the signal using different spreading factors
It can coexist in a channel.Compared with the FSK systems of conventionally employed fixed rate, the star topology of LoRa agreements disappears
Except synchronization overhead and hop count, thus power consumption is reduced, in general 95% node only takes up 10% total energy consumption.
Further, with reference to figure 2, Fig. 3 and Fig. 4, in the detection device for the parking space state that the utility model embodiment provides,
Also include：Digital analog converter DA and analog-digital converter AD；
Controller 201 electrically connects with analog-digital converter AD, specifically for being generated according to drive signal for controlling microwave electric
The control data signal that road 202 works, control data signal is sent to digital analog converter DA；
Digital analog converter DA is electrically connected with microwave circuit 202, and data signal is controlled for receiving, and control data signal is turned
Control analog signal is changed to, and control analog signal is sent to microwave circuit 202；
Microwave circuit 202 is also electrically connected with analog-digital converter AD, and analog signal is controlled specifically for receiving, according to control mould
Intend signal to launch the microwave signal of at least one frequency range and receive the analogue echoes signal returned, the analogue echoes of reception are believed
Number send to analog-digital converter AD；
Analog-digital converter AD, for receiving analogue echoes signal, analogue echoes signal is converted into echo data signal, and
Echo data signal is sent to controller 201.
Further, with reference to figure 2, Fig. 3 and Fig. 4, in the detection device for the parking space state that the utility model embodiment provides,
Also include：First amplifier A and/or the second amplifier B；
Digital analog converter DA electrically connects with the first amplifier A, specifically for control analog signal is sent to the first amplification
Device A；
First amplifier A is electrically connected with microwave circuit 202, and analog signal is controlled for receiving, and control analog signal is entered
Row enhanced processing, analog signal will be amplified and sent to microwave circuit 202；
And/or microwave circuit 202 electrically connects with the second amplifier B, for receiving amplified analog signal, according to amplification mould
Intend signal to launch the microwave signal of at least one frequency range and receive the analogue echoes signal returned, the analogue echoes of reception are believed
Number send to the second amplifier B；
Second amplifier B is electrically connected with analog-digital converter AD, and for receiving analogue echoes signal, analogue echoes signal is entered
Row enhanced processing, obtained amplification analogue echoes signal is sent to analog-digital converter AD.
In the utility model embodiment, above-mentioned first amplifier A and the second amplifier B type selecting and the requirement of design are not
Together, embody as follows：
Above-mentioned first amplifier A and the second amplifier B type selecting are different, and the first amplifier A receives data signal and is
0v-3v staircase waveform belongs to big signal, therefore need to only ensure that the first amplifier A quiescent dissipations are sufficiently low, such as the first amplification
Device A quiescent dissipations are less than 100uA, 3V, without other special requirement.And the second amplifier B, amplify high frequency small-signal, except requiring quiet
, it is necessary to have enough bandwidth and PSRR, sufficiently low noise coefficient etc. beyond state is low in energy consumption.
As an alternative embodiment, the first amplifier A and the second amplifier B is provided in the utility model embodiment
Model be respectively TLC27L7IDR, OPA2376AQDRQ1.
As a kind of complete embodiment, the detection device of the parking space state in the utility model embodiment includes digital-to-analogue
Converter DA, analog-digital converter AD, the first amplifier A and the second amplifier B；
Specifically, MCU STM32L476 (i.e. controller 201) staircase waveform (i.e. data signals) according to caused by drive signal
Send to digital analog converter DA and carry out digital-to-analogue conversion, obtain controlling analog signal, the control analog signal passes through the first amplifier A
N times of amplification, output signal enters microwave circuit 202, and is used as the VT of microwave circuit 202.Microwave circuit 202 utilizes reflection
Principle by the signal of its dual-mode antenna be mixed and export intermediate-freuqncy signal into the second amplifier B be amplified processing (now this
Signal is analogue echoes signal), afterwards into analog-digital converter AD, obtain echo data signal.MCU is then according to multiple number of echoes
The difference of word signal carries out the judgement of parking space state.Wherein, the first amplifier A and the second amplifier B associated working judges to be checked
Measuring car position whether there is vehicle, and the first amplifier A receives (the i.e. control simulation of staircase waveform or triangular wave etc. caused by digital analog converter DA
Signal) it is amplified, the second amplifier B is used for amplifying intermediate-freuqncy signal (i.e. analogue echoes signal).
As an alternative embodiment, above-mentioned digital analog converter DA, analog-digital converter AD are integrated in controller noted above
In 201.Guarantee is needed to have it should be noted that being integrated with above-mentioned digital analog converter DA and analog-digital converter AD controller 201
Enough I/O (input/output port) and there are digital analogue signal conversion and Analog-digital Converter function.
Illustrate controller 201, digital analog converter DA, analog-digital converter AD, the first amplifier A and the second amplifier B
Judge parking stall to be detected whether there is the process of vehicle：
When in parking stall to be detected without car, digital analog converter DA produces staircase waveform in controller 201, by the first amplifier
A amplifies N times, and output signal enters microwave circuit 202, and is used as the VT of microwave circuit 202.Microwave circuit 202 is using instead
Penetrate principle and the signal of dual-mode antenna is mixed and exports intermediate frequency small-signal and enter the second amplifier B amplifications, intermediate frequency small-signal warp
It is 2V to cross microwave circuit 202 and handle in the signal amplitude after the second amplifier B amplifications.And there is car in parking stall to be detected
When, it is 2.5V that intermediate frequency small-signal is handled in the signal amplitude after the second amplifier B amplifications by microwave circuit 202, therefore,
It without car signal difference is 2.5V-2V=500mV to have car.Also, there is the difference without car in car and parking stall to be detected in parking stall to be detected
Value is more than threshold value (setting parking space state change threshold) 100mV for having car without car signal intensity of setting, final controller 201
Receiving above-mentioned 2.5V signals and 2V signals and judge 500mV ＞ 100m, the result for handling to obtain is that parking stall to be detected changes,
I.e. the parking stall to be detected is changed into having car state from without car state.
Further, with reference to figure 2, Fig. 3 and Fig. 4, in the detection device for the parking space state that the utility model embodiment provides,
Also include：Power module 203；
Power module 203 is electric with controller 201, microwave circuit 202, the first amplifier A and/or the second amplifier B respectively
Connection, for being powered for controller 201, microwave circuit 202, the first amplifier A and/or the second amplifier B.
Specifically, the power supply of microwave detecting device 20 uses low power dissipation design, i.e., supplied using power module 203 (i.e. battery)
Electricity, in order to maintain the normal work controller 201 (i.e. MCU) of microwave detecting device 20 often to be powered using 3.3v.
Illustrate structure of the above-mentioned power module 203 for above-mentioned each device power supply separately below：
First, in the detection device for the parking space state that the utility model embodiment provides, in addition to power supply circuit 204；
Power module 203 electrically connects with power supply circuit 204, the amplifications of the amplifier A of power supply circuit 204 and first and/or second
Device B connections, for being that the first amplifier A and/or the second amplifier B powers by power supply circuit 204；
Controller 201 also electrically connects with power supply circuit 204, for controlling the break-make of power supply circuit 204, to control power supply
Module 203 is the first amplifier A and/or the second amplifier B power supply.
Wherein, above-mentioned power supply circuit 204 includes：Power switching module DC-DC, the first low pressure difference linear voltage regulator LD0 and
Controlling switch 206；Wherein, controlling switch 206 can be MOSFET, or optocoupler, be opened with control in following embodiments
206 are closed to illustrate for MOSFET；
Power switching module DC-DC is connected with power module 203, for the electricity for the magnitude of voltage for providing power module 203
The electric energy of matching the first amplifier A and/or the second amplifier B magnitude of voltage can be converted to；
First low pressure difference linear voltage regulator LD0 electrically connects with power switching module DC-DC, for reducing power switching module
DC-DC is the low-frequency noise in the first amplifier A and/or the second amplifier B power supply process；
Controller 201 electrically connects with the controlling switch 206, for controlling the conducting and disconnection of controlling switch 206；
Controlling switch 206 also respectively with the first low pressure difference linear voltage regulator LD0, the first amplifier A and/or the second amplifier
B is electrically connected, in conducting, being that the first amplifier A and/or the second amplifier B powers；And disconnect when, stop for
First amplifier A and/or the second amplifier B power supplies.
Wherein, enter so that the detection device of parking space state includes two amplifiers of the first amplifier A and the second amplifier B as an example
Row explanation：
In order to maintain Simulation scale-up circuit (the Simulation scale-up circuit includes the first amplifier A, the second amplifier B) outstanding fortune
Make, power supply uses DC-DC → LDO working method, in order to realize intermittent power supply using 1. DC-DC (i.e. power switching module DC-
DC) → LDO (i.e. the first low pressure difference linear voltage regulator LD0) → controlling switch 206 (can be that switch mosfet or optocoupler are opened
Close) power supply plan, or, using 2. DC-DC (i.e. power switching module DC-DC) → LDO (i.e. the first low pressure difference linearity voltage stabilizings
Device LD0) power supply plan.
Wherein：1. scheme is that the electricity of power supply control, i.e. power module 203 is realized by switch mosfet or optical coupled switch
Amount is converted to matching the first amplifier A and the second amplifier B magnitude of voltage by DC-DC (i.e. power switching module DC-DC)
Electric energy, low-frequency noise is then being reduced by low pressure difference linear voltage regulator, first is given by switch mosfet or optical coupled switch
Amplifier A and the second amplifier B power supplies, are realized simpler；
Scheme is 2.：Enabled using MCU controls LDO, directly control the first amplifier A and the second amplifier B power supply break-make,
Reduce a switch of controlling switch 206 so as to cost-effective.Application way 2. when, it is necessary to assure LDO output have it is sufficiently low
Ripple (so except from excellent Ripple Suppression than LDO, it is also necessary to LDO output stages can connect sufficiently large negative
Carry electric capacity), based on this, in the utility model embodiment, the power supply of microwave circuit 202 directly controls LDOA using controller 201
It is enabled, and amplifier power supply uses DC-DC → LDO → MOSFET/ optocoupler power supply plans.Used in the utility model embodiment
To two kinds of LDO, LP5907 and LP2980, both of which has excellent Ripple Suppression ratio and preferable carrying load ability.
For DC-DC, it is recommended to use TI TPS61040, its gather high Ripple Suppression below than LDO, LP5907 can be preferable
Realize power supply.Higher occasion is being required to ripple, the NLCV32T-100K-PF of Linear can used, it has excellent property
Energy.
Further, with reference to figure 2, Fig. 3 and Fig. 4, in the detection device for the parking space state that the utility model embodiment provides,
Also include：Second low pressure difference linear voltage regulator LD0A；Second low pressure difference linear voltage regulator LD0A respectively with power module 203 with and
Microwave circuit 202 electrically connects；Power module 203, for being powered for microwave circuit 202；Second low pressure difference linear voltage regulator LD0A,
For reducing the low-frequency noise during power module 203 is powered for microwave circuit 202.
In the utility model embodiment, power supply BAT and the second low pressure difference linear voltage regulator LD0A are used as microwave circuit
202 power supplies.Wherein, depending on the second low pressure difference linear voltage regulator LD0A follows the demand of microwave circuit 202, the electricity of microwave circuit 202
Demand shift is measured, the second low pressure difference linear voltage regulator LD0A supply voltage also changes therewith.
Further, with reference to figure 2, Fig. 3 and Fig. 4, in the detection device for the parking space state that the utility model embodiment provides,
Also include：3rd low pressure difference linear voltage regulator LD0B；3rd low pressure difference linear voltage regulator LD0B respectively with power module 203 and control
Device 201 processed electrically connects；Power module 203, for being powered for controller 201；3rd low pressure difference linear voltage regulator LD0B, for dropping
Low power module 203 is the low-frequency noise during controller 201 is powered.
In the utility model embodiment, power supply BAT and the 3rd low pressure difference linear voltage regulator LD0B are used as controller 201
Power supply.
The detection device of parking space state in the utility model embodiment uses geomagnetic sensor 10+ microwave detecting devices
20, for microwave detecting device 20, start with circuit design from each element, module, using low power dissipation design, so as to drop
The overall power of low microwave detecting device 20.
The detection device for a kind of parking space state that the utility model embodiment provides, using being arranged in parking stall to be detected
Geomagnetic sensor 10 and microwave detecting device 20；Whether change and become by the detection parking space state of microwave detecting device 20
Parking space state after change, and, the startup of control microwave detecting device is aided in by geomagnetic sensor 10；With profit in the prior art
Parking space state is detected with geomagnetic sensor 10, the obtained testing result degree of accuracy is poor to be compared, and it is sensed using earth magnetism
The assisted microwave synthesis detection means 20 of device 10 detects to parking space state, reduces unlatching microwave detecting device 20 in real time and detection is set
Standby power consumption, saved cost, meanwhile, when being detected using microwave signal to parking stall not by the changes of magnetic field near parking stall,
Vehicle translational speed changes and the influence of external environment so that the degree of accuracy of testing result is higher.
The utility model embodiment additionally provides a kind of detecting system of parking space state, with reference to figure 3 and Fig. 4, including it is above-mentioned
The detection device of parking space state, in addition to upper end equipment 30；
The detection device of parking space state communicates to connect with upper end equipment 30, for detecting the parking space state of parking stall to be detected
Parking space state after situation of change and parking stall to be detected change, supreme end equipment 30 is sent by testing result；
Upper end equipment 30, for receiving testing result, and responds testing result..
The detecting system for a kind of parking space state that the utility model embodiment provides, with utilizing earth magnetism to sense in the prior art
Device is detected to parking space state, and the obtained testing result degree of accuracy is poor to be compared, and it is examined using geomagnetic sensor assisted microwave synthesis
Device is surveyed to detect parking space state, reduce open in real time microwave detecting device to the power consumption of detection device, saved into
This, meanwhile, when being detected using microwave signal to parking stall not by the changes of magnetic field near parking stall, vehicle translational speed change with
And the influence of external environment so that the degree of accuracy of testing result is higher.
It should be noted that：Similar label and letter represents similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined, then it further need not be defined and explained in subsequent accompanying drawing in individual accompanying drawing, in addition, term " the
One ", " second ", " the 3rd " etc. are only used for distinguishing description, and it is not intended that instruction or hint relative importance.
Finally it should be noted that：Embodiment described above, only specific embodiment of the present utility model, to illustrate this
The technical scheme of utility model, rather than its limitations, the scope of protection of the utility model is not limited thereto, although with reference to foregoing
The utility model is described in detail embodiment, it will be understood by those within the art that：It is any to be familiar with this skill
For the technical staff in art field in the technical scope that the utility model discloses, it still can be to the skill described in previous embodiment
Art scheme is modified or can readily occurred in change, or carries out equivalent substitution to which part technical characteristic；And these modifications,
Change is replaced, and the essence of appropriate technical solution is departed from the spirit and model of the utility model embodiment technical scheme
Enclose.It should all cover within the scope of protection of the utility model.Therefore, the scope of protection of the utility model should be wanted with the right
The protection domain asked is defined.
Claims (10)
- A kind of 1. detection device of parking space state, it is characterised in that including：Geomagnetic sensor and microwave detecting device；Describedly Magnetic Sensor and the microwave detecting device are arranged in parking stall to be detected；The geomagnetic sensor electrically connects with the microwave detecting device, for detecting the earth magnetism magnetic force in parking stall region to be detected Parameter, when detecting that the earth magnetism magnetic force parameter changes, drive signal is generated, and the drive signal is sent to institute State microwave detecting device；The microwave detecting device, for receiving the drive signal, at least one frequency range is launched according to the drive signal Microwave signal and the echo data for receiving return, it is corresponding according to the parking space state of the echo data, the parking stall to be detected Basic wave data and setting parking space state change threshold, determine the situation of change of the parking space state of the parking stall to be detected And the parking space state after parking stall change to be detected.
- 2. the detection device of parking space state according to claim 1, it is characterised in that the microwave detecting device includes： Controller and microwave circuit；The controller is connected with the geomagnetic sensor, the drive signal sent for receiving the geomagnetic sensor, according to The drive signal generates the control signal for controlling the microwave circuit work, and the control signal is sent to described micro- Wave circuit；The microwave circuit, for the control signal according to reception, launch the microwave signal of at least one frequency range and connect The echo data returned is received, the echo data of reception is sent to the controller；The controller is additionally operable to, according to the echo data received, judge the echo data and the parking stall to be detected Parking space state corresponding to Basic wave data difference whether be more than setting parking space state change threshold, if so, according to described The parking space state of parking stall to be detected and the echo data, determine the parking space state after the parking stall change to be detected；Wherein, institute Stating Basic wave data includes：Without car state Basic wave data and parking state Basic wave data.
- 3. the detection device of parking space state according to claim 2, it is characterised in that also include：Digital analog converter and mould Number converter；The controller electrically connects with the analog-digital converter, specifically for being generated according to the drive signal for described in controlling The control data signal of microwave circuit work, the control data signal is sent to the digital analog converter；The digital analog converter electrically connects with the microwave circuit, for receiving the control data signal, by the control number Word signal is converted to control analog signal, and the control analog signal is sent to the microwave circuit；The microwave circuit also electrically connects with the analog-digital converter, specifically for receiving the control analog signal, according to institute State control analog signal to launch the microwave signal of at least one frequency range and receive the analogue echoes signal returned, by the institute of reception Analogue echoes signal is stated to send to the analog-digital converter；The analog-digital converter, for receiving the analogue echoes signal, the analogue echoes signal is converted into echo numeral Signal, and the echo data signal is sent to the controller.
- 4. the detection device of parking space state according to claim 3, it is characterised in that also include：First amplifier and/or Second amplifier；The digital analog converter electrically connects with first amplifier, specifically for the control analog signal is sent to described First amplifier；First amplifier electrically connects with the microwave circuit, for receiving the control analog signal, by the control mould Intend signal and be amplified processing, analog signal will be amplified and sent to the microwave circuit；And/or the microwave circuit electrically connects with second amplifier, for receiving the amplified analog signal, according to institute State amplified analog signal to launch the microwave signal of at least one frequency range and receive the analogue echoes signal returned, by the institute of reception Analogue echoes signal is stated to send to second amplifier；Second amplifier electrically connects with the analog-digital converter, for receiving the analogue echoes signal, to the echo Analog signal is amplified processing, and obtained amplification analogue echoes signal is sent to the analog-digital converter.
- 5. the detection device of parking space state according to claim 4, it is characterised in that also include：Power module；The power module amplifies with the controller, the microwave circuit, first amplifier and/or described second respectively Device electrically connects, for being powered for the controller, the microwave circuit, first amplifier and/or second amplifier.
- 6. the detection device of parking space state according to claim 5, it is characterised in that also including power supply circuit；The power module electrically connects with the power supply circuit, the power supply circuit and first amplifier and/or described the Two amplifiers connect, for being that first amplifier and/or second amplifier are powered by the power supply circuit；The controller also electrically connects with the power supply circuit, described to control for controlling the break-make of the power supply circuit Power module is the power supply of first amplifier and/or second amplifier.
- 7. the detection device of parking space state according to claim 6, it is characterised in that the power supply circuit includes：Power supply Switch module, the first low pressure difference linear voltage regulator and controlling switch；The power switching module is connected with the power module, and the electric energy of the magnitude of voltage for the power module to be provided turns It is changed to the electric energy for the magnitude of voltage for matching first amplifier and/or second amplifier；The low pressure difference linear voltage regulator electrically connects with the power switching module, for reducing the power switching module as institute State the low-frequency noise in the first amplifier and/or the second amplifier power supply process；The controller electrically connects with the controlling switch, for controlling the conducting and disconnection of the controlling switch；The controlling switch also electrically connects with the low pressure difference linear voltage regulator, the first amplifier and/or the second amplifier respectively, For in conducting, being that first amplifier and/or the second amplifier are powered；And when disconnecting, stop to be put with first Big device and/or the second amplifier power supply.
- 8. the detection device of parking space state according to claim 5, it is characterised in that also include：Second low pressure difference linearity Voltage-stablizer and the 3rd low pressure difference linear voltage regulator；Second low pressure difference linear voltage regulator respectively with the power module with and institute State microwave circuit electrical connection；3rd low pressure difference linear voltage regulator is electrically connected with the power module and the controller respectively Connect；The power module, for being powered for the microwave circuit and the controller；Second low pressure difference linear voltage regulator, For reducing the low-frequency noise during the power module is powered for the microwave circuit；3rd low pressure difference linear voltage regulator, it is during the controller is powered for reducing the power module Low-frequency noise.
- 9. the detection device of parking space state according to claim 2, it is characterised in that also including communication module；It is described logical Letter module electrically connects with the controller, and the communication module is additionally operable to be connected with upper end equipment communication, for receiving the control The parking space state testing result that device processed is sent, the testing result is sent to the upper end equipment.
- 10. a kind of detecting system of parking space state, it is characterised in that including the parking space state described in claim any one of 1-9 Detection device, in addition to upper end equipment；The detection device of the parking space state is connected with the upper end equipment communication, for detecting the parking space state of parking stall to be detected Situation of change and parking stall to be detected change after parking space state, testing result is sent to the upper end equipment；The upper end equipment, for receiving the testing result, and respond the testing result.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720875806.4U CN207123945U (en) | 2017-07-18 | 2017-07-18 | A kind of detection device of parking space state and the detecting system of parking space state |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720875806.4U CN207123945U (en) | 2017-07-18 | 2017-07-18 | A kind of detection device of parking space state and the detecting system of parking space state |
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| CN207123945U true CN207123945U (en) | 2018-03-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110697528A (en) * | 2019-09-10 | 2020-01-17 | 宁夏电通物联网科技股份有限公司 | Detection device for detecting opening and closing states of car door based on diffuse reflection, elevator and detection method |
| CN113824463A (en) * | 2020-06-19 | 2021-12-21 | 珠海深圳清华大学研究院创新中心 | Signal receiving and transmitting device and intelligent traffic system with same |
-
2017
- 2017-07-18 CN CN201720875806.4U patent/CN207123945U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110697528A (en) * | 2019-09-10 | 2020-01-17 | 宁夏电通物联网科技股份有限公司 | Detection device for detecting opening and closing states of car door based on diffuse reflection, elevator and detection method |
| CN113824463A (en) * | 2020-06-19 | 2021-12-21 | 珠海深圳清华大学研究院创新中心 | Signal receiving and transmitting device and intelligent traffic system with same |
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