CN220272002U - Handheld terminal for reverse car searching in parking lot - Google Patents

Abstract

The utility model discloses a handheld terminal for reverse car searching in a parking lot, and relates to the technical field of wireless transmission equipment. The handheld terminal adopts the chip type omnidirectional antenna as a wireless transmitting and receiving module of the handheld terminal, and is arranged in a protective shell of the handheld terminal. The chip type omnidirectional antenna is fixed in the protective shell in a specific gesture, so that the chip type omnidirectional antenna can realize the function of the directional antenna and achieve the measurement precision same as that of the directional antenna. The utility model adopts the built-in antenna mode, which can reduce the volume of the handheld terminal, can protect the antenna well, and can avoid the contact between the antenna and the outside.

Description

Handheld terminal for reverse car searching in parking lot

Technical Field

The utility model relates to the technical field of wireless transmission equipment, in particular to the technical field of reverse car searching in a parking lot, and more particularly relates to a handheld terminal for reverse car searching in a parking lot.

Background

In daily life, people often suffer from the trouble of finding the direction and position of the target placed object, for example, people park vehicles in a parking lot during traveling, but because of the complex structure of many parking lots, the trouble of 'finding vehicles' is easily caused for vehicle owners. The reason is that the large or complex parking lot has a large number of floors, large space and difficult direction identification, is often similar to a maze, and a vehicle owner can hardly record the specific parking position clearly, so that the problem of difficult vehicle searching is commonly existed.

In the prior art, in order to find a vehicle, a vehicle owner either memorizes or photographs the vehicle by himself or reserves a parking space number to find the vehicle, but even if the vehicle is provided with the parking space number, the vehicle finding is very difficult under the condition of not being familiar with the inside of a parking lot; or the map system is used for acquiring a map of a parking lot and then reverse vehicle searching route guidance is performed according to the parking position, however, the map system cannot work normally in a place without a GPS signal.

The utility model patent application publication with publication number CN103871265A and name of a wireless car searching method and system discloses a wireless car searching method, which comprises the following steps: the user triggers the vehicle searching function of the handheld module, and the handheld module sends a vehicle searching request to the vehicle-mounted module; the vehicle-mounted module receives a vehicle searching request sent by the handheld module and sends a corresponding vehicle searching request to the handheld module; the handheld module receives a vehicle searching request response sent by the vehicle-mounted module; the user carries the handheld module to repeat the steps for three times in three vehicle searching positions to obtain three vehicle searching request response signals, and a micro control unit in the handheld module calculates the position of the vehicle-mounted module according to the three vehicle searching positions and the intensity of the three vehicle searching request response signals; and the handheld module displays the position of the vehicle-mounted module to the user, namely the position of the display real vehicle.

The prior art provides a conventional wireless vehicle searching method, according to which a handheld module is required to calculate the position of a vehicle-mounted module according to the intensity of a received three-time vehicle searching request response signal, and the high requirement is put on the accuracy of a receiving antenna in the handheld module, and the conventional wireless vehicle searching method is generally realized by adopting a directional antenna with set frequency. But the directional antenna is too large in size, inconvenient to store and inconvenient to carry for users.

The utility model discloses a wireless car searching device 1 of a parking lot, which comprises a car searching device and a display screen, wherein the upper end of the car searching device is connected with an antenna 2, a protective shell 3, a buckling groove 5, the display screen 6, a first pressing key 7, a second pressing key 8, a third pressing key 9 and a switch key 10, the upper end of the protective shell 3 is connected with a buckle 4, the side surface of the car searching device is provided with a USB port, a processor module is arranged in the car searching device, and the processor module is electrically connected with the display screen, the wireless receiving and transmitting module and the power supply module, and the antenna is connected with a car control end through wireless.

Referring to fig. 1 of the specification, fig. 1 of the specification is a diagram of the specification of the above patent publication CN209641089U, and the antenna is a telescopic antenna, and when in use, the antenna needs to be drawn out, and the vehicle searching operation can be performed after the antenna is fully extended. The antenna is repeatedly pulled, so that the damage of the antenna can be caused, the service life of the vehicle searching device is influenced, the antenna cannot be completely stored in the protective shell, the antenna can collide with other objects when a user carries the vehicle, the damage is caused, the receiving precision of the user is influenced, the telescopic antenna is large in size, and the user is inconvenient to use and carry the vehicle.

Disclosure of Invention

In order to overcome the defects and the shortcomings in the prior art, the utility model provides a handheld terminal for reverse car searching in a parking lot, and the utility model aims to provide the handheld terminal for reverse car searching in the parking lot, which is small in size, convenient to carry and convenient to use. The handheld terminal adopts the chip type omnidirectional antenna as a wireless transmitting and receiving module of the handheld terminal, and is arranged in a protective shell of the handheld terminal. The chip type omnidirectional antenna is fixed in the protective shell in a specific gesture, so that the chip type omnidirectional antenna can realize the function of a directional antenna and achieve a measurement effect similar to that of the directional antenna. The utility model adopts the built-in antenna mode, which can reduce the volume of the handheld terminal, can protect the antenna well, and can avoid the contact between the antenna and the outside, and simultaneously, the specific fixed structure can further protect the antenna and ensure the stability of the antenna while the omnidirectional antenna realizes the directional antenna function.

In order to solve the problems in the prior art, the utility model is realized by the following technical scheme.

The utility model provides a handheld terminal for reverse car searching in a parking lot, which comprises a protective shell, wherein a power supply module, a micro control unit circuit board, a display module and an antenna are arranged in the protective shell, and the antenna, the power supply module and the display module are all connected with the micro control unit circuit board; the antenna is a flat omnidirectional antenna, and the flat omnidirectional antenna is arranged in the protective shell in a state that the plane of the antenna coil is parallel to the thickness direction of the protective shell.

Further preferably, the flat omni-directional antenna is an FPC soft antenna or a PCB antenna.

Further preferably, the flat omni-directional antenna is located at the front end of the display module, and defines that the direction in which the midpoint of the display module extends toward the front end is a positive direction, and then the projection of the midpoint of the flat omni-directional antenna on the horizontal plane is located on the projection of the positive direction on the horizontal plane.

Further preferably, a supporting structure for supporting and fixing the flat omnidirectional antenna is arranged in the protective shell.

Still further preferably, the support structure is a support plate parallel to the thickness direction of the protective housing.

Still further preferably, the support structure further comprises a guard casing front end inner wall, a gap for accommodating the flat omni-directional antenna is provided between the support plate and the guard casing front end inner wall, and the guard casing front end inner wall and the support plate together form the support structure.

Still further preferably, the front end of the protective housing is configured to have a predetermined curvature, the support plates have the same curvature, and the flat omni-directional antenna is secured within the protective housing at the predetermined curvature by the support structure.

Further preferably, the protecting shell comprises an upper shell and a lower shell, and the upper shell and the lower shell are buckled together; the support structure is disposed on the lower housing.

The lower shell is internally provided with a mounting structure for mounting the micro-control unit circuit board; the mounting structure comprises four mounting plates distributed along a rectangle, wherein screw holes for fixing the micro control unit circuit board are formed in two mounting plates.

The upper shell is provided with a display window, and the display module is positioned in the display window; the upper shell is also provided with a button, and the button is connected with the micro-control unit circuit board.

The tail of the protective shell is provided with a connecting hole, and the side of the protective shell is provided with a charging interface.

Compared with the prior art, the beneficial technical effects brought by the utility model are as follows:

1. the utility model replaces the directional antenna in the existing handheld terminal with the flat omnidirectional antenna, so that the antenna can be built in the protective shell. In the prior art, directional antennas are mostly adopted to measure the direction by utilizing the directivity of the directional antennas; the flat omnidirectional antenna is specifically selected and fixed in the protective shell in a posture that the plane of the antenna coil is parallel to the thickness direction of the protective shell, so that the flat omnidirectional antenna can realize the function of a directional antenna, and the direction finding in the vehicle searching process is completed. The utility model can achieve the measurement effect similar to the directional antenna, can reduce the volume of the handheld terminal, can play a good role in protecting the antenna, and can avoid the antenna from contacting with the outside.

2. The flat omnidirectional antenna is specifically selected and fixed in a specific posture, so that direction finding in the vehicle searching process can be realized; if the flat omnidirectional antenna is horizontally placed in the protective shell, the vehicle finding and direction finding purposes cannot be achieved.

3. In the utility model, the FPC soft antenna or the PCB antenna is preferably used, and the two types of antennas are fixed in the protective shell according to the gesture defined by the utility model, so that the function of the directional antenna can be realized, and the precision requirement and the measurement requirement of the vehicle-searching handheld terminal on the antenna are completed. The two types of antennas have low cost, good receiving effect and small volume.

4. The utility model defines the relative position of the flat omnidirectional antenna and the display module, when the vehicle searching function is triggered by the handheld terminal according to the use habit of a user, the square (placement) of the handheld terminal is adopted in the general use state, the extending direction of the front end of the midpoint of the display module is defined as the positive direction, the viewing by the user is convenient, the midpoint of the flat omnidirectional antenna and the positive direction are combined into a vertical plane, the viewing by the user is convenient, the antenna is further convenient to receive the vehicle searching request response signal, the signal intensity among the vehicle searching request response signals is distinguished, and the position of the vehicle-mounted module is calculated.

5. According to the utility model, the support structure is arranged in the protective shell, and the antenna can be stably fixed by the support structure, so that the attitude of the antenna is ensured not to change, the antenna is protected from being damaged, and the service life of the antenna is prolonged. The supporting structure is a supporting plate, the flat omnidirectional antenna can be stuck on the supporting plate, and in order to further prevent the antenna from being displaced, the supporting plate and the inner wall of the front end of the protecting shell fixedly support the flat omnidirectional antenna in the protecting shell together, so that the fixing stability of the omnidirectional antenna is enhanced.

6. According to the utility model, the omnidirectional antenna is supported and fixed in the protective shell in a set radian, the omnidirectional antenna in an arc shape and the arc-shaped supporting plate can place the flat omnidirectional antenna along the radian, so that the axial occupied length of the flat omnidirectional antenna is reduced, and the miniaturization treatment of the volume of the protective shell is facilitated.

7. The protective shell comprises the upper shell and the lower shell, so that the structural stability of the protective shell is enhanced, the protective shell is convenient to detach and mount, all components are fixed on the lower shell, the installation and the detachment are convenient, the structural stability of components such as a micro-control unit circuit board is enhanced, and the protective shell is convenient for a user to use.

Drawings

FIG. 1 is a schematic diagram of a wireless vehicle searching device in the prior art;

FIG. 2 is a schematic diagram of the overall structure of the handheld terminal of the present utility model;

FIG. 3 is a schematic perspective view of the lower housing of the handheld terminal of the present utility model;

FIG. 4 is a schematic diagram of a front view of a lower housing of the handheld terminal of the present utility model;

FIG. 5 is a schematic perspective view of the upper housing of the handheld terminal of the present utility model;

FIG. 6 is a schematic diagram of a front view of a housing of the handheld terminal of the present utility model;

FIG. 7 is a schematic cross-sectional view of a handheld terminal of the present utility model;

fig. 8 is a schematic perspective view of a flat omni-directional antenna according to the present utility model;

fig. 9 is a schematic diagram of an actual measurement structure of a handheld terminal in a parking lot according to the present utility model;

reference numerals: 1. a protective shell, 2, a supporting structure, 3, a flat omnidirectional antenna, 4, a display module, 5, a supporting plate, 6, a gap, 7, and the inner wall of the front end of the protective shell, 8, upper shell, 9, lower shell, 10, mounting plate, 11, screw hole, 12, display window, 13, button, 14, connecting hole, 15, interface that charges.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

As a preferred embodiment of the present utility model, referring to fig. 2 of the specification, the present embodiment discloses a handheld terminal for reverse car searching in a parking lot, the handheld terminal includes a protective housing 1, a power module, a micro control unit circuit board, a display module 4 and an antenna are disposed in the protective housing 1, and the antenna, the power module and the display module 4 are all connected with the micro control unit circuit board; the antenna is a flat omnidirectional antenna 3, and the flat omnidirectional antenna 3 is arranged in the protective housing 1 in a state that a plane where an antenna coil is arranged is parallel to the thickness direction of the protective housing 1.

In this embodiment, the flat omni-directional antenna 3 is used instead of the directional antenna in the existing handheld terminal so that it can be built in the shield case 1. In the prior art, directional antennas are mostly adopted to measure the direction by utilizing the directivity of the directional antennas; the flat omnidirectional antenna 3 is specifically selected and fixed in the protective shell 1 in a posture that the plane of the antenna coil is parallel to the thickness direction of the protective shell 1, so that the flat omnidirectional antenna 3 can realize the function of a directional antenna, and the direction finding in the vehicle searching process is completed. The antenna can achieve a measurement effect similar to that of a directional antenna, the volume of the handheld terminal can be reduced, the antenna can be well protected, the antenna is prevented from being contacted with the outside, and meanwhile, the antenna can be further protected while the directional antenna function is achieved by the aid of the fixed structure with the characteristics, and the stability of the antenna is ensured.

If the flat omnidirectional antenna 3 is horizontally placed in the protective shell 1, the purpose of vehicle finding and direction finding cannot be achieved.

The following is a description of the principle that the measurement effect similar to that of the directional antenna can be achieved by fixing the flat omni-directional antenna 3 in the shield case 1 in a posture in which the plane of the antenna coil is parallel to the thickness direction of the shield case 1 in the present embodiment.

Although the omni-directional antenna is adopted in the present embodiment, the flat omni-directional antenna 3 is specifically selected, and the flat omni-directional antenna 3 can receive the vehicle-searching request response signal (hereinafter referred to as a radio signal) sent by the vehicle-mounted module in all directions; however, in the actual situation, the receiving intensities of the radio signals received by the flat omni-directional antenna 3 in different directions are different, as shown in fig. 8 of the specification, the length direction of the flat omni-directional antenna 3 is defined as the Y axis, the width direction is defined as the X axis, and the thickness direction is defined as the Z axis (i.e. the thickness direction of the plane in which the antenna coil is located); the receiving intensities of the signals received by the flat omnidirectional antenna 3 in the directions of the X axis, the Y axis and the Z axis are different, and the direction finding is realized by utilizing the difference of the intensity of the signals received by the flat omnidirectional antenna 3 in different directions of the receiving directions.

According to the description of the prior art CN103871265A, a wireless vehicle searching method and system, a handheld module sends a vehicle searching request to a vehicle-mounted module; the vehicle-mounted module receives a vehicle searching request sent by the handheld module and sends a corresponding vehicle searching request to the handheld module; the handheld module receives a vehicle searching request response sent by the vehicle-mounted module; the user carries the handheld module to repeat the steps for three times in three vehicle searching positions to obtain three vehicle searching request response signals, and the micro control unit in the handheld module calculates the position of the vehicle-mounted module according to the three vehicle searching positions and the intensity of the three vehicle searching request response signals. The handheld module of this embodiment needs to receive the vehicle-seeking request response signal sent by the vehicle-mounted module at two different vehicle-seeking positions (i.e. the handheld module faces two different directions), and calculates the direction of the vehicle-mounted module by the strength of the two vehicle-seeking request response signals.

Specifically, referring to fig. 9 of the specification, fig. 9 shows a schematic view of a scene of searching vehicles in a parking lot, when a vehicle needs to be searched, a handheld module receives a vehicle searching request response signal sent by a vehicle-mounted module towards two (at least 2, if the vehicle searching request response signal is a crossroad, 3 directions need to be faced), the direction with the strongest signal source is calculated through the intensity of the vehicle searching request response signal twice, the vehicle is walked to the next crossroad, and the direction with the strongest signal source of the current crossroad is measured again until the vehicle is guided to the position of the vehicle-mounted module. The flat omnidirectional antenna fixed in a specific posture and the flat omnidirectional antenna placed in a horizontal posture are subjected to actual measurement comparison in the first direction and the second direction, and the measurement results are shown in the following table 1:

table 1 is a table of comparison of RSSI values received by flat omni-directional antennas placed in different orientations in two different directions

As can be seen from table 1, the maximum difference between the RSSI values measured in two directions by the posture that the plane of the antenna coil is parallel to the thickness direction of the protective housing and is specifically defined in the application is 20, the minimum difference is 11, the two directions have larger intensity differences, the flat omnidirectional antenna placed in a horizontal posture is adopted, the maximum difference between the RSSI values measured in the first direction and the second direction is 2, the difference is smaller, and the difference cannot realize accurate positioning of the vehicle-mounted module.

The measured RSSI values are displayed values at different times, and are values that change at different times according to the interference of the received signal, and the three values in table 1 are obtained by photographing at three different times (at the same distance).

The experimental data prove that the direction finding in the vehicle searching process can be realized only by specifically selecting a flat omnidirectional antenna and fixing the antenna in a specific posture.

Example 2

As a further preferred embodiment of the present utility model, this embodiment is further elaborated and supplemented with the technical solution of the present utility model based on embodiment 1 described above.

In this embodiment, as a preferred implementation manner of this embodiment, the flat omni-directional antenna 3 is an FPC soft antenna or a PCB antenna. The two types of antennas are fixed in the protective shell 1 according to the gesture defined by the utility model, so that the function of a directional antenna can be realized, and the precision requirement and the measurement requirement of the vehicle-searching handheld terminal on the antennas are completed. The two types of antennas have low cost, good receiving effect and small volume. The flat omni-directional antenna 3 may be affixed within the protective housing in a cohesive manner in a particular posture as defined herein.

As a preferred implementation manner of this embodiment, the flat omni-directional antenna 3 is located at the front end of the display module 4, and defines the direction in which the midpoint of the display module 4 extends toward the front end as a positive direction, so that the projection of the midpoint of the flat omni-directional antenna 3 on the horizontal plane is located on the projection of the positive direction on the horizontal plane. In this embodiment, according to the usage habit of the user, when the vehicle searching function is triggered by the handheld terminal, the handheld terminal is placed in a normal usage state, the extending direction of the midpoint of the display module 4 towards the front end is defined as a positive direction, so that the user can check the vehicle conveniently, the midpoint of the flat omnidirectional antenna 3 and the positive direction are a vertical plane, the user can check the vehicle conveniently, meanwhile, the antenna can receive the vehicle searching request response signal conveniently, the signal intensity among the vehicle searching request response signals for many times is distinguished, and the position of the vehicle-mounted module is calculated.

Example 3

As a further preferred embodiment of the present utility model, the present embodiment is a detailed explanation and supplement to the progress made in the technical solution of the present utility model based on embodiment 1 or embodiment 2 described above.

As shown in fig. 3 and 4 of the specification, a support structure 2 for supporting and fixing the flat omni-directional antenna 3 is disposed in the protective housing 1.

Further preferably, the support structure 2 is a support plate 5 parallel to the thickness direction of the protective housing 1. In the present embodiment, the flat omni-directional antenna 3 may be fixed to the support plate 5 in an adhesive manner.

As a further implementation manner of this embodiment, referring to fig. 3, 4 and 7 of the specification, in order to further prevent the antenna from being displaced, the supporting structure 2 further includes a front end inner wall 7 of the protecting shell, a gap 6 for accommodating the flat omni-directional antenna 3 is provided between the supporting plate 5 and the front end inner wall 7 of the protecting shell, and the front end inner wall 7 of the protecting shell and the supporting plate 5 together form the supporting structure 2. The fixing stability of the omni-directional antenna is enhanced.

As a further implementation manner of this embodiment, referring to fig. 4 and 7 of the specification, the front end of the protective housing 1 is set to have a set arc, the support plate 5 has the same arc, and the flat omni-directional antenna 3 is fixed in the protective housing 1 by the support structure 2 with the set arc.

As a further implementation manner of this embodiment, referring to fig. 2 of the specification, the protecting shell 1 includes an upper shell 8 and a lower shell 9, and as shown in fig. 3 of the specification and fig. 5 of the specification, the upper shell 8 and the lower shell 9 are buckled together; the support structure 2 is arranged on the lower housing 9.

Further preferably, as shown in fig. 4 of the specification, a mounting structure for mounting the micro-control unit circuit board is further provided inside the lower housing 9; the mounting structure comprises four mounting plates 10 distributed along a rectangle, wherein screw holes 11 for fixing the micro control unit circuit board are formed in two mounting plates 10.

Further preferably, as shown in fig. 6 of the specification, a display window 12 is formed on the upper casing 8, and the display module 4 is located in the display window 12; the upper shell 8 is also provided with a button 13, and the button 13 is connected with the micro-control unit circuit board.

As yet another example of the preferred embodiment, the display module may be a touch display module, with keys of the user triggering the vehicle seeking function of the handheld module being integrated on the touch display module.

The tail of the protecting shell 1 is provided with a connecting hole 14, and the side edge of the protecting shell 1 body is provided with a charging interface 15.

Claims (10)

1. The handheld terminal comprises a protective shell (1), wherein a power supply module, a micro control unit circuit board, a display module (4) and an antenna are arranged in the protective shell (1), and the antenna, the power supply module and the display module (4) are all connected with the micro control unit circuit board; the method is characterized in that: the antenna is a flat omnidirectional antenna (3), and the flat omnidirectional antenna (3) is arranged in the protective shell (1) in a posture that the plane of an antenna coil is parallel to the thickness direction of the protective shell (1).

2. A hand-held terminal for reverse car seeking in a parking lot as claimed in claim 1, wherein: the flat omnidirectional antenna (3) is an FPC soft antenna or a PCB antenna.

3. A hand-held terminal for reverse car searching in a parking lot according to claim 1 or 2, wherein: the flat omnidirectional antenna (3) is positioned at the front end of the display module (4), and the direction of extending the midpoint of the display module (4) to the front end is defined as the positive direction, so that the projection of the midpoint of the flat omnidirectional antenna (3) on the horizontal plane is positioned on the projection of the positive direction on the horizontal plane.

4. A hand-held terminal for reverse car searching in a parking lot according to claim 1 or 2, wherein: a supporting structure (2) for supporting and fixing the flat omnidirectional antenna (3) is arranged in the protective shell (1).

5. A hand-held terminal for reverse car seeking in a parking lot as claimed in claim 4, wherein: the supporting structure (2) is a supporting plate (5) parallel to the thickness direction of the protective shell (1).

6. A hand-held terminal for reverse car seeking in a parking lot as in claim 5, wherein: the supporting structure (2) further comprises a protective shell front end inner wall (7), a gap (6) for accommodating the flat omnidirectional antenna (3) is arranged between the supporting plate (5) and the protective shell front end inner wall (7), and the protective shell front end inner wall (7) and the supporting plate (5) together form the supporting structure (2).

7. A hand-held terminal for reverse car seeking in a parking lot as claimed in claim 6, wherein: the front end of the protective shell (1) is provided with a set radian, the supporting plates (5) are provided with the same radian, and the flat omnidirectional antenna (3) is fixed in the protective shell (1) by the supporting structure (2) with the set radian.

8. A hand-held terminal for reverse car seeking in a parking lot as claimed in claim 4, wherein: the protective shell (1) comprises an upper shell (8) and a lower shell (9), and the upper shell (8) and the lower shell (9) are buckled together; the support structure (2) is arranged on the lower housing (9).

9. A hand-held terminal for reverse car seeking in a parking lot as claimed in claim 8, wherein: the lower shell (9) is internally provided with a mounting structure for mounting the micro control unit circuit board; the mounting structure comprises four mounting plates (10) distributed along a rectangle, wherein screw holes (11) for fixing the micro control unit circuit board are formed in two mounting plates (10).

10. A hand-held terminal for reverse car seeking in a parking lot as claimed in claim 8, wherein: a display window (12) is formed in the upper shell (8), and the display module (4) is positioned in the display window (12); the upper shell (8) is also provided with a button (13), and the button (13) is connected with the micro control unit circuit board.