CN210223066U

CN210223066U - Static vehicle detector

Info

Publication number: CN210223066U
Application number: CN201920948916.8U
Authority: CN
Inventors: Duoyan Yang; 杨多燕; Duosheng Yang; 杨多胜
Original assignee: ROSIM ITS TECHNOLOGY Co Ltd
Current assignee: ROSIM ITS TECHNOLOGY Co Ltd
Priority date: 2019-06-21
Filing date: 2019-06-21
Publication date: 2020-03-31
Anticipated expiration: 2029-06-21

Abstract

The utility model provides a pair of static vehicle detector includes: the device comprises a packaging shell, a packaging cavity is arranged in the packaging shell, and a geomagnetic field detection module, a laser distance detection module, a control module, a wireless communication module and a power supply module are arranged in the packaging cavity; the control module preliminarily judges whether an object exists in the parking space according to the disturbance information of the geomagnetic field detected by the geomagnetic field detection module, after the disturbance information of the geomagnetic field tends to be stable, the laser distance detection module is started to send out a laser pulse signal, the height information of the object above the parking space and the ground is detected, when the height information is in the height range of a chassis of a conventional vehicle, the fact that the vehicle exists in the parking space is judged, and then a parking space state detection result is sent out through the wireless communication module; the combination of the geomagnetic field detection module and the laser distance detection module is adopted, the state information of the vehicle on the high-precision wireless side detection parking lot is realized in a distance measurement mode, the power consumption is low, and the practicability is higher.

Description

Static vehicle detector

Technical Field

The utility model relates to a parking stall state detection area especially relates to a static vehicle detector.

Background

The existing parking space detector can be divided into a wired parking space detector and a wireless parking space detector according to the communication mode of the existing parking space detector.

The parking space detector adopting the wired communication mode adopts the technologies of an ultrasonic detection method, a video detection method, an infrared detection method and the like, the detection methods all need to adopt the wired power supply and wired communication mode because the consumed electric energy is high, but the detection precision of the detection product adopting the wired communication mode is generally higher than that of the wireless parking space detection product, and the ultrasonic detection method is most widely applied. However, the wired parking space detector has the greatest limitation that the wired parking space detector is large in installation workload, consumes manpower and materials, and needs more construction for a parking lot, such as wiring, erection of installation supports and the like. Because the detector has high energy consumption, is not beneficial to energy conservation and environmental protection, and aiming at an infrared detection method, because the color of the vehicle chassis is generally dark or black, the absorption capacity of the vehicle chassis to light is very strong, errors exist by adopting the infrared detection method, and misjudgment can occur particularly to the vehicle with a high chassis.

In the parking space detector adopting the wireless communication mode in the prior art, a single geomagnetic field detection mode is mostly adopted in the detection method, and because the detection mode consumes very little energy, the detector can adopt a battery power supply mode, a wired power supply is not used for supplying power, and then a wireless communication mode can be adopted. By adopting a wireless communication means, the workload during installation can be greatly reduced, the material cost is saved, secondary construction in the parking lot is less, and the energy consumption of the equipment is also low. However, the detection principle of this method is to detect the disturbance of the vehicle to the earth magnetic field to determine the existence of the vehicle, due to the diversity of the manufacturing materials, heights and chassis frame structures of different vehicles, the disturbance of the vehicle to the earth magnetic field is different in condition and magnitude, the disturbance of the chassis center of some vehicles to the earth magnetic field is very small, the chassis of some large vehicles is very high, the detector on the ground cannot detect the existence of the vehicle, and the disturbance of some vehicles to the earth magnetic field is very weak due to the weak ferromagnetism of a large amount of aluminum materials or plastics, so that the detector on the ground cannot detect the existence of the vehicle, which all cause the missing detection of the parking space sensor adopting a single earth magnetic field detection mode, the detection precision is low, and the error is large.

SUMMERY OF THE UTILITY MODEL

In view of the above situation, the utility model provides a static vehicle detector improves the detection precision of vehicle on the parking stall, and its precision is high, the low power dissipation.

To this end, the utility model provides a static vehicle detector for whether there is the vehicle to park on the detection parking stall, it includes: a package housing, said package housing defining a package cavity therein, said stationary vehicle detector further comprising, enclosed within said package cavity: the geomagnetic field detection module is used for detecting disturbance information of the parking space geomagnetic field; the laser distance detection module is used for sending a laser pulse signal to an object above the parking space and detecting the height of the object from the ground; the control module is used for preliminarily judging whether an object exists in the parking space according to the disturbance information of the geomagnetic field, starting the laser distance detection module to send a laser pulse signal after the disturbance information of the geomagnetic field tends to be stable, detecting the height information of the object above the parking space and the ground, and judging that a vehicle exists in the parking space when the height information is within the height range of a conventional vehicle chassis; the wireless communication module is used for sending out the parking space state detection result; and the power supply module is used for supplying power to the geomagnetic field detection module, the laser distance detection module, the control module and the wireless communication module.

Preferably, the laser distance detection module is a TOF pulse laser ranging detection module, which is a laser ranging module with low power consumption.

Preferably, the power module comprises a rechargeable power module and/or a battery type power module, and the rechargeable power module is independently adopted, so that the battery is replaced without disassembling the sealed packaging cavity, namely, the damage of the sealing state is avoided; the advantage of adopting the battery type power module alone is that the detector can quickly enter a working state by replacing the battery when the detector is not powered; the power module adopting the combination of the rechargeable power module and the battery type power module has the advantage of improving the cruising ability, wherein the battery type power module is used as an emergency standby.

Preferably, the control module compares the magnetic field value of the parking space detected by the geomagnetic field detection module with a background magnetic field value, and compares an absolute value of a change rate of the magnetic field value with a non-zero preset value, if the absolute value of the change rate is smaller than the preset value, the laser distance detection module is started to send out N laser pulse signals for detection, and the height information obtained by the detection result is a height average value of N detections; the height average value is obtained by calculation in the control module after N times of detection, so that the detection precision can be further improved, and accidental errors are reduced, wherein N is 5 in the embodiment, namely the laser distance detection module sends 5 times of laser pulse signals, and the calculated height information is the average value in the 5 times.

Preferably, the non-zero preset value is any value between 5% and 10%, the background geomagnetic field value refers to a parking space geomagnetic field value detected by the geomagnetic field detection module under the condition that no vehicle is parked in a parking space, and the sensitivity of the device is improved and the device is adapted to be used in different scenes through setting of the size of the non-zero preset value.

Preferably, the control module judges the type of the vehicle parked in the parking space according to the height information, wherein when the height of the object above the parking space from the ground is detected to be 10-17.5 cm, the control module judges that the vehicle is arranged above the parking space and the type of the vehicle is a common car; when the height of an object above the parking space from the ground is detected to be 20-25 cm, judging that a vehicle is arranged above the parking space and the vehicle type is an off-road vehicle; when the height of the object above the parking space from the ground is detected to be larger than 25cm and smaller than 1m, the fact that the vehicle is arranged above the parking space and the vehicle type is a large vehicle is judged, and when the distance height is smaller than 10cm, the fact that the object which is not the vehicle is arranged on the parking space can be judged, so that the object needs to be cleaned.

Preferably, the package housing includes: the packaging structure comprises a body, a detachable bottom cover and an annular body arranged around the circumference of the body, wherein the body comprises a top part and an opposite bottom part, the top part is designed to be an arc surface, at least one transparent part is further arranged on the arc surface, the arc surface of the annular body is matched with the annular body to form a segment-shaped packaging shell when the annular body is matched with the body, a side wall vertically extends from the bottom part to the direction far away from the top part, the bottom part and the side wall surround to form a packaging cavity with an opening, and the bottom cover is matched with the body to seal the packaging cavity; the transparent part is used for the laser distance detection module to send out laser pulse signals and receive the laser pulse signals that reflect back, and the encapsulation shell after the assembly the body is located the ring body middle part, and the encapsulation shell after the assembly is the segment of a sphere shape simultaneously, and the segment of a sphere face is laminated with ground, avoids the encapsulation shell is installed and is had the step of sudden change on ground, the ring body is used for location, fixed and protection the body.

Preferably, the annular body has an inner cavity portion, and the inner cavity portion is provided with a grid structure to enhance the mechanical strength of the annular body and better protect the body.

Preferably, the bottom cover and the body are in sealing fit through a sealing ring or a sealing glue, and sealing and waterproofness of the packaging cavity are guaranteed.

Preferably, the stationary vehicle detector is installed in the middle of the parking space, and the installation mode of the stationary vehicle detector includes surface installation or buried installation.

The utility model has the advantages that:

compared with the prior art, the utility model provides a static vehicle detector, by control module tentatively judges whether there is the object on the parking stall according to the disturbance information of the geomagnetic field that geomagnetic field detection module detected, after the disturbance information of geomagnetic field tends to steadily, start laser distance detection module sends laser pulse signal, detects the height information of object distance ground above the parking stall, works as height information is in conventional vehicle chassis height range, then judges that there is the vehicle on the parking stall, sends out parking stall state detection result by wireless communication module again; the combination of a geomagnetic field detection module and a laser distance detection module is adopted, the state information of the vehicle on the high-precision wireless side detection parking lot is realized in a distance measurement mode, and the state information can be sent to a receiving end to be displayed; meanwhile, the geomagnetic field detection module with low energy consumption is always in an on-duty state in the detection process, and is started only when a vehicle stops at a parking space or is driven away, the laser distance detection module is used for distance detection, so that the static vehicle detector is low in power consumption, can meet long-time working requirements by adopting a built-in power module, does not need to be wired with an external power supply, and is simpler in structural design, higher in practicability and suitable for use in more occasions.

Drawings

FIG. 1 is a schematic structural diagram of a stationary vehicle detector package provided by an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the stationary vehicle detector package housing of FIG. 1;

fig. 3 is a schematic structural diagram of a stationary vehicle detector module according to an embodiment of the present invention.

In the figure: 1-annular body, 1.1-fixed mounting part, 1.2-fixed mounting hole position, 2-body, 2.1-transparent part, 2.2-top, 2.3-bottom, 3-packaging cavity, 4-bottom cover, 10-power supply module, 20-geomagnetic field detection module, 30-control module, 40-wireless communication module and 50-laser distance detection module.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and embodiments.

Examples

Referring to fig. 1, 2 and 3, the static vehicle detector provided in this embodiment is installed in a middle position of a parking space, and is ensured to be located below a vehicle chassis, and is used for detecting whether a vehicle is parked in the parking space, and the static vehicle detector includes: the device comprises a packaging shell, wherein a packaging cavity 3 is arranged in the packaging shell, and a geomagnetic field detection module 20, a laser distance detection module 50, a control module 30, a wireless communication module 40 and a power supply module 10 are arranged in the packaging cavity 3.

Referring to fig. 1, wherein the package housing includes: the device comprises a body 2, a detachable bottom cover 4 and an annular body 1 arranged around the circumference of the body 2, wherein the annular body 1 is provided with three fixed mounting parts 1.1 at equal angles along the circumference, and the three fixed mounting parts 1.1 are respectively provided with a fixed mounting hole position 1.2; the body 2 includes a top 2.2 and a relative bottom 2.3, top 2.2 designs for the cambered surface, still be equipped with an at least transparent portion 2.1 on the cambered surface, ring body 1 with its when the body 2 cooperation the cambered surface with ring body 1 agrees with and forms the segment shape encapsulation shell, bottom 2.3 is to keeping away from the direction vertical extension of top 2.2 has a lateral wall, and this bottom 2.3 has an open-ended with this lateral wall around forming encapsulation chamber 3, bottom 4 with body 2 realizes sealed cooperation through sealing washer or sealed glue in order to seal encapsulation chamber 3, guarantees encapsulation chamber 3's sealed and waterproof nature.

Further, the annular body 1 has an inner cavity (not shown) provided with a grid structure for enhancing the mechanical strength thereof and better protecting the body 2.

Referring to fig. 3, the geomagnetic field detection module 20 is configured to detect disturbance information of the parking space geomagnetic field; the laser distance detection module 50 sends a laser pulse signal to an object above the parking space, and is used for detecting the height of the object from the ground; the control module 30 preliminarily determines whether an object is in the parking space according to the disturbance information of the geomagnetic field detected by the geomagnetic field detection module 20, starts the laser distance detection module 50 to send a laser pulse signal after the disturbance information of the geomagnetic field tends to be stable, detects the height information of the object above the parking space from the ground, determines that a vehicle is in the parking space when the height information is in the height range of the chassis of a conventional vehicle, and sends out the parking space state detection result by the wireless communication module 40; the power module 10 is used for providing power to the geomagnetic field detection module 20, the laser distance detection module 50, the control module 30 and the wireless communication module 40.

Further, in this embodiment, the laser distance detection module 50 selects a TOF pulse laser distance measurement detection module with low power consumption to reduce the overall power consumption.

Specifically, the control module 30 compares the magnetic field value of the parking space detected by the geomagnetic field detection module 20 with a background magnetic field value, and compares the absolute value of the change rate with a non-zero preset value, if the absolute value of the change rate is smaller than the preset value, the laser distance detection module 50 is started to send out N (N is greater than or equal to 1) times of laser pulse signals for detection, and the height information obtained by the detection result is a height average value of N times of detection; the height average value is obtained by calculation in the control module 30 after N times of detection, so that the detection precision can be further improved, and accidental errors can be reduced; the non-zero preset value is any value between 5% and 10%, the background geomagnetic field value refers to a parking space geomagnetic field value detected by the geomagnetic field detection module 20 under the condition that no vehicle is parked on a parking space, and the sensitivity of the device is improved and the device is adapted to be used in different scenes at the same time through setting of the size of the non-zero preset value.

Further, the control module 30 determines the type of the vehicle parked in the parking space according to the height information, wherein when the height of the object above the parking space from the ground is detected to be 10-17.5 cm, it is determined that the vehicle is above the parking space and the type of the vehicle is a common car; when the height of an object above the parking space from the ground is detected to be 20-25 cm, judging that a vehicle is arranged above the parking space and the vehicle type is an off-road vehicle; and when the height of the object above the parking space from the ground is detected to be more than 25cm and less than 1m, judging that the vehicle is arranged above the parking space and the vehicle type is a large vehicle.

In this embodiment, the power module 10 can select a rechargeable power module 10, a battery-type power module 10, or a combined power module 10 of the rechargeable power module 10 and the battery-type power module 10, and if the advantage of the rechargeable power module 10 is adopted alone, the sealed packaging cavity 3 does not need to be disassembled for battery replacement, i.e., the damage of the sealed state is avoided; the advantage of using the battery-operated power module 10 alone is that it can be quickly put into operation by replacing the battery when the detector is dead; the power module 10 using the combination of the rechargeable power module 10 and the battery-type power module 10 has an advantage of improving the cruising ability, in which the battery-type power module 10 is used as an emergency backup.

The embodiment is realized by combining the following drawings:

the static vehicle detector provided by the embodiment is arranged in the middle of the parking space, so that the static vehicle detector is ensured to be arranged below a vehicle chassis, and the static vehicle detector can be selectively arranged in a surface type or a buried type.

When the parking space monitoring system works, the geomagnetic field detection module 20 is in a continuous detection state, namely an on-duty state, under the control of the control module 30, and when a vehicle enters or exits a parking space, the geomagnetic field detection module 20 in the on-duty state detects disturbance information of a geomagnetic field on the parking space and sends the disturbance information of the geomagnetic field to the control module 30; the geomagnetic field detection module 20 has low power consumption, typically only tens to hundreds of microamperes, and is therefore used as a preliminary determination means.

Judging whether the geomagnetic field of the parking place has disturbance or not through the control module 30, namely whether the geomagnetic field has change in size and/or direction or not, if so, entering the step (three), otherwise, returning to the step (one); generally, the axle of a moving vehicle generates strong disturbance to the geomagnetic field, so the geomagnetic field detection module 20 detects the disturbance of the axle to the geomagnetic field in the parking space, and transmits the data information to the control module 30, so as to preliminarily determine whether the vehicle enters or exits the parking space.

Thirdly, preliminarily judging that vehicles may drive in or drive out, and continuously detecting geomagnetic field data until the geomagnetic field data tends to be stable; the control module 30 controls the geomagnetic field detection module 20 to continuously detect the current geomagnetic field value, and the detected geomagnetic field value tends to be stable as the vehicle gradually stops or drives out.

Judging whether the absolute value of the change rate of the parking space geomagnetic field data which tends to be stable is larger than a non-zero preset value compared with the background geomagnetic field value, if so, entering (eight); if not, entering into (five); the control module 30 compares the detected geomagnetic field value at the time that the vehicle tends to be stationary with the measured geomagnetic field value of the parking space (i.e. the background geomagnetic field value) when no vehicle is parked in the parking space, and if the difference is not obvious, the difference is expressed by a change rate, for example, the change rate is within 10%, it is determined that no vehicle is present. This may be true because the vehicle is parked halfway and is driven away, or because the ferromagnetism in the middle of the vehicle chassis is too weak to allow the geomagnetic field detected by the geomagnetic field detection module 20 to have a small amount of change relative to the background magnetic field when no vehicle is parked. Therefore, in order to improve the detection reliability and prevent the small variation from being caused by drift of the geomagnetic field rather than difference of the vehicles, the parking space state sensor provided in this embodiment intentionally regards that the variation of the geomagnetic field detection value is within 10% for the first time as undeterminable, and needs to continue to the step (five) to start the laser distance detection module 50 to make further accurate judgment and confirmation.

(V) starting the laser distance detection module 50 to detect the height of an object above the parking space from the ground; the laser distance detection module 50 emits 5 times of laser pulse signals (the short time is measured in milliseconds or microseconds) in a short time, when an obstacle blocks above a parking space, the laser pulse signals are reflected, the laser distance detection module 50 calculates height information of the obstacle distance detection module measured for 5 times according to phase change or time difference of emitted laser and reflected laser, and transmits the data to an A/D acquisition port of the control module 30 in a voltage simulation mode, and the control module 30 judges the distance between the obstacle detected by the laser distance detection module 50 and the ground surface of the parking space according to a voltage value and calculates a height average value of the distance between the obstacle and the ground surface.

Judging whether the height of the object above the parking space, which is detected by the laser distance detection module 50, from the ground is within a conventional vehicle chassis height range or not according to the average height value, if so, entering the step (eight), and if not, entering the step (seven); if the distance is infinite, the parking space belongs to an outdoor parking lot, the sky is above the parking space, and no vehicle exists; if the distance is more than 100cm and is equivalent to the background value measured when no vehicle exists, the parking space belongs to an indoor parking lot, fixed building facilities such as ceilings, pipelines, brackets and the like are arranged above the parking space, or even if the distance is not equivalent to the background value, the chassis height of the vehicle is generally not more than 100cm according to experience, so that the situation that no vehicle exists above the parking space can be judged when the detected distance is more than 100 cm; and if the distance is less than 100cm, the vehicle can be judged to be stopped above the parking space. Conventional vehicle chassis heights range between 10cm and 100 cm.

(VII) obtaining a detection result: no vehicle is in the parking space;

further, when the height of an object above the parking space from the ground is less than 10cm, it is judged that a non-vehicle object exists above the parking space, and if the parking space is an outdoor parking space, the parking space is possibly covered by objects such as fallen leaves, garbage or dust, and needs to be cleaned in time; if the parking space is indoor, other objects may be stored, and the parking space also needs to be checked in time; if the distance exceeds 100cm, it is determined that there is no vehicle in the parking space or that the vehicle has exited the parking space.

(eighth), obtaining a detection result: a vehicle is arranged on the parking space;

furthermore, the vehicle type of the vehicle parked in the parking space can be judged by corresponding table lookup according to the vehicle chassis height data of various vehicle types, for example, the chassis height of a common car is usually between 10cm and 17.5cm, the chassis height of a cross-country vehicle is usually between 20cm and 25cm, and the chassis height of a large vehicle is usually more than 25 cm.

And (ninthly) sending the detection result out through the wireless communication module 40. After the judgment is completed, the control module 30 drives the wireless communication module 40 to work and send out the detection result in a wireless manner, so that the detection result can be further matched with a display end to display the parking space state, such as an external LED display screen, a liquid crystal display screen, a PC end or a mobile phone end to display in real time.

The above description is only for the specific embodiments of the present invention, but it should be understood by those skilled in the art that the present invention is only by way of example, and the scope of the present invention is defined by the appended claims. Therefore, the equivalent changes made in the claims of the present invention still belong to the scope covered by the present invention.

Claims

1. A stationary vehicle detector for detecting whether a vehicle is parked at a parking space, the stationary vehicle detector comprising: a package housing, the package housing comprising: a body, a detachable bottom and encircle a ring body that body circumference set up, the body includes a top and a relative bottom, the top design is the cambered surface, still be equipped with an at least transparent portion on the cambered surface, the ring body with its when the body cooperation its cambered surface with the ring body agrees with and forms the segmental sphere encapsulation shell, the bottom is to keeping away from the direction vertical extension of top has a lateral wall, and this bottom and this lateral wall have an open-ended encapsulation chamber around forming, the bottom with the body cooperation is in order to seal the encapsulation chamber, still be equipped with in the encapsulation chamber: the device comprises a geomagnetic field detection module, a laser distance detection module, a control module, a wireless communication module and a power supply module; the geomagnetic field detection module, the laser distance detection module, the wireless communication module respectively with control module electric connection, power module is used for the geomagnetic field detection module, the laser distance detection module, control module and the wireless communication module provide the power, wherein:

the geomagnetic field detection module is used for detecting disturbance information of the parking space geomagnetic field;

the laser distance detection module sends a laser pulse signal to an object above the parking space and is used for detecting the height of the object from the ground;

the control module is used for starting the laser distance detection module to send out a laser pulse signal according to the disturbance information of the geomagnetic field so as to judge whether a vehicle is in the parking space;

and the wireless communication module is used for sending out the parking space state detection result.

2. The stationary vehicle detector of claim 1, wherein the laser distance detection module is a TOF pulsed laser range detection module.

3. A stationary vehicle detector as claimed in claim 1, characterized in that the power supply module comprises a plug-in power supply module and/or a battery-operated power supply module.

4. The stationary vehicle detector according to claim 1, wherein the annular body has an inner cavity portion, the inner cavity portion being provided with a lattice structure for enhancing mechanical strength thereof.

5. The stationary vehicle detector of claim 1, wherein said bottom cover is sealingly engaged with said body by a sealing ring or sealant.

6. The stationary vehicle detector of claim 1, wherein the stationary vehicle detector is installed in a mid-space location in a manner that includes surface or buried installation.