CN218471356U - Pedestrian passageway gate machine with transparent gate - Google Patents

Abstract

The embodiment of the application provides a pedestrian passageway floodgate machine with transparent gate, it includes the floodgate machine body, transparent gate, the instruction banks, the axis of rotation, transparent gate rotates to be connected and forms the axis of rotation at the middle part of floodgate machine body, the axis of rotation extends the grip block along radial direction, the grip block is used for centre gripping transparent gate suspension in subaerial, the upper end at the grip block is accomodate to the instruction banks, and shine to transparent gate, be provided with the instruction region on the transparent gate, instruct regional setting in the direction of shining of instruction banks. Its pilot lamp group can shine transparent gate's side, and light conduction can land on the instruction area territory in transparent gate, makes the luminance increase of instruction area territory, and luminous effect is obvious, instructs the district and can warn the pedestrian about transparent gate open the door, the closed state, prevents on the one hand that the pedestrian from hitting transparent gate, and on the other hand has also protected the pedestrian, uses safelyr, reduces the possibility that the pedestrian hit transparent gate by mistake.

Description

Pedestrian passageway gate machine with transparent gate

Technical Field

The application relates to the technical field of entrance guard management, in particular to a pedestrian passageway gate machine with a transparent gate.

Background

People passage gates are often used in public places such as residential districts and office buildings for access control management. Current people's bank of china passageway floodgate machine includes floodgate machine body, gate, face identification host computer, and the face identification host computer includes display screen and camera. Through the camera, the human face recognition of the pedestrian by the human face recognition host can be realized. Because the non-contact access control identification mode of face identification is adopted, the existing pedestrian passageway gate machine adopts a transparent gate, careless pedestrians can directly walk into the passageway of the pedestrian passageway gate machine usually and then hit the gate, the gate can be damaged on the one hand, the stability of gate swing is reduced, the service life of the gate is prolonged, and on the other hand, the body of the pedestrians can be injured, so that potential safety hazards are caused.

Disclosure of Invention

To prior art's not enough, this application embodiment provides a pedestrian's passageway floodgate machine with transparent gate, and it includes floodgate machine body, transparent gate, instruction banks, axis of rotation, transparent gate rotates to be connected the middle part of floodgate machine body forms the axis of rotation, the axis of rotation extends the grip block along radial direction, the grip block is used for the centre gripping transparent gate suspension is subaerial, the instruction banks is accomodate the upper end of grip block, and shine to transparent gate, be provided with the instruction region on the transparent gate, it sets up to instruct regional in the direction of illumination of banks.

Preferably, the indicator light group comprises first indicator lights, and a plurality of the first indicator lights are sequentially arranged in the clamping plate along the height direction; when the transparent gate works, the first indicating lamp irradiates a first color on the indicating area of the transparent gate.

Preferably, the indicator light group further comprises a second indicator light, and the plurality of second indicator lights and the plurality of first indicator lights are adjacently arranged in the clamping plate along the height direction; when the gate valve works, the first indicator lamp irradiates a first color on the indicating area of the transparent gate, and the second indicator lamp irradiates a second color on the indicating area of the transparent gate.

Preferably, the first indicator light stably or flickers to illuminate the first color, and the first color is one of yellow, green and red.

Preferably, the first indicator light illuminates the first color stably or in a flickering manner, the second indicator light illuminates the second color stably or in a flickering manner, the first color is one of green and red, and the second color is the other of green and red.

Preferably, the indicating lamp set transversely irradiates the side edge of the transparent gate, and the transparent gate is transversely provided with grains.

Preferably, the lines are a plurality of hole grooves transversely formed in the indication area;

or the lines are frosted films attached to the indicating areas.

Preferably, the floodgate machine further comprises a display screen and a camera, the camera is fixedly connected above the rotating shaft, the camera protrudes out of the floodgate machine body, and the display screen is arranged at the front end of the floodgate machine body.

Preferably, in the height direction, the top end of the transparent gate is at the same height as the top end of the camera.

Preferably, the floodgate body is frame type structure, including inclined plane, last frame, lower frame, preceding frame and back frame, it is corresponding with the lower frame to go up the frame, preceding frame is corresponding with back frame, inclined plane one end is connected go up the frame, and the other end is connected preceding frame, be provided with on the inclined plane the display screen, the display screen embedding is installed on the inclined plane, the inclined plane is with the inclination theta of horizontal plane: theta is more than or equal to 30 degrees and less than or equal to 55 degrees.

The embodiment of the application provides a pedestrian passageway floodgate machine with transparent gate, its pilot lamp group can shine transparent gate's side, light conducts and can land on the indication area in transparent gate, make the luminance increase of indication area, luminous effect is obvious, the indication area can warn the opening door of pedestrian about transparent gate, the closure state, prevent on the one hand that the pedestrian from hitting transparent gate, on the other hand has also protected the pedestrian, compare in current pedestrian passageway floodgate machine, the pedestrian passageway floodgate machine with transparent gate that this application provided uses safelyr, reduce the possibility that the pedestrian collided transparent gate by mistake.

Additional features and advantages of the disclosure will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the above-described techniques.

In order to make the aforementioned objects, features and advantages of the present application comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

FIG. 1 is a front view of a pedestrian passageway gate with a transparent gate according to an embodiment of the present disclosure;

FIG. 2 is a perspective view of a gate body of a pedestrian passageway gate with a transparent gate according to an embodiment of the present application;

fig. 3 is a side view of a gate body of a pedestrian passageway gate with a transparent gate according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not construed as indicating or implying relative importance.

Referring to fig. 1 to 3, an embodiment of the present application provides a pedestrian passageway gate with a transparent gate 4, which includes a gate body 1, the transparent gate 4, an indicator light set 61, and a rotating shaft 6. The transparent shutter 4 is rotatably connected to the middle of the shutter body 1 to form a rotating shaft 6, the rotating shaft 6 extends in a radial direction to form a holding plate 62, and the holding plate 62 and the rotating shaft 6 are integrally formed. The holding plate 62 is used for holding the transparent gate 4 suspended above the ground, and the transparent gate 4 may be made of acrylic plate or tempered glass. The indicator lamp group 61 is housed at the upper end of the holding plate 62 and faces the transparent shutter 4. The transparent shutter 4 is provided with an indication area 41, and the indication area 41 is provided in the irradiation direction of the indicator lamp group 61. The light emitted from the indicator light set 61 can irradiate the indication area 41 of the transparent gate 4, so that the indication area 41 can emit light and shine, and the prompt property and the warning property of the transparent gate 4 are enhanced.

Referring to fig. 2, in a general embodiment, the indicator light set 61 includes a first indicator light (not shown), which may be an LED light. The plurality of first indicator lamps are arranged in the holding plate 62 in order in the height direction and are received in the holding plate 62. In operation, the first indicator light illuminates a first color on the indicator area 41 of the transparent shutter 4. In order to improve the lighting effect of the indication area 41, the first indicator light may stably or twinkling illuminate a first color, and the first color is one of yellow, green and red. When the first indicator light steadily illuminates the first color, the first color may be yellow. By utilizing the characteristics of yellow high resolution and strong penetrating power, pedestrians can feel strong irradiation no matter in the day or at night, and then the existence of the transparent gate 4 for the pedestrians is prompted, so that the pedestrians are prevented from colliding with the transparent gate 4.

Referring to fig. 2, in a general embodiment, the indicator light set 61 further includes a second indicator light (not shown), and the second indicator light may be an LED light. A plurality of second indicator lamps and first indicator lamps are arranged adjacent to each other in the height direction in the holding plate 62. In operation, the first indicator light illuminates a first color on the indicating area 41 of the transparent gate 4, and the second indicator light illuminates a second color on the indicating area 41 of the transparent gate 4. The first indicator light is stable or flickers to irradiate a first color, the second indicator light is stable or flickers to irradiate a second color, the first color is one of green and red, and the second color is the other of green and red. For example, the first color of the first indicator light is green, which indicates that the door 4 is accessible, and the second color of the second indicator light is red, which indicates that the door 4 is not accessible, i.e., closed.

In order to improve the light transmission in the transparent gate 4 and to illuminate the indication area 41 of the transparent gate 4, the indication lamp set 61 transversely irradiates the side edge of the transparent gate 4, and the transparent gate 4 may be transversely provided with grains. The lines are consistent with the irradiation direction of the indicating lamp set 61, so that light can be better attached to the lines. In a general embodiment, the texture is a plurality of hole grooves transversely formed on the indication region 41, and the plurality of hole grooves form a plurality of textures in the shape of "transverse lines", so as to enrich the light emitting effect of the indication region 41. In other embodiments, the texture may be a frosted film attached to the indication area 41, and the frosted film may diffuse light, thereby increasing the brightness of the light and further enhancing the brightness of the indication area 41.

Referring to fig. 1 to 3, an embodiment of the present application provides a pedestrian passageway gate with a transparent gate, which includes a gate body 1, a main control module (not shown in the figures), a transparent gate 4, a display screen 2, and a camera 5, wherein the main control module is installed in the gate body 1, and the main control module is electrically connected to the transparent gate 4, the display screen 2, and the camera 5. The camera 5 is used for obtaining the face information, and the main control module controls the rotation condition of the transparent gate 4 and the display condition of the display screen 2 according to the recognition condition of the face information. Transparent gate 4 rotates to be connected and forms axis of rotation 6 in the middle part of floodgate body 1, and the top fixedly connected with camera 5 of axis of rotation 6, camera 5 can not rotate along with the rotation of axis of rotation 6. The camera 5 is arranged on the floodgate body 1 in a protruding mode, and the front end of the floodgate body 1 is provided with the display screen 2.

Referring to fig. 1 and 2, in order to improve the experience of the pedestrian using the pedestrian passageway gate, the camera 5 may be obliquely disposed on the rotation shaft 6, that is, the shooting direction of the camera 5 is shifted toward the passageway of the pedestrian passageway gate. The shooting direction of camera 5 forms contained angle alpha with the length direction of floodgate machine body 1, and contained angle alpha is: alpha is more than or equal to 5 degrees and less than or equal to 20 degrees. Specifically, the included angle α is 5 °, 10 °, 15 °, 20 °, and the like, and can be adjusted according to actual use. The camera 5 of slope can acquire pedestrian's face information more conveniently, and the pedestrian also need not to turn round the head and towards camera 5, improves and can use experience.

Referring to fig. 1 and 2, the camera further includes a light supplement lamp 51, the light supplement lamp 51 is electrically connected to the main control module, and the light supplement lamp 51 is disposed below the camera 5. The camera 5 can be installed in the sleeve with light filling lamp 51 jointly, and the sleeve matches with the axle sleeve shape of axis of rotation 6. The sleeve can with axle sleeve fixed connection, when axis of rotation 6 rotated, camera 5, light filling lamp 51 can not rotate, and camera 5 and light filling lamp 51 are fixed always on the sleeve.

Referring to fig. 1 to 2, a pedestrian passageway gate with a transparent gate according to an embodiment of the present disclosure includes a gate body 1, a display screen 2, and an identity module 3. The gate body 1 can be a frame structure and comprises an inclined plane 11, an upper frame 12, a lower frame 13, a front frame 14 and a rear frame 15, wherein the upper frame 12 corresponds to the lower frame 13, the front frame 14 corresponds to the rear frame 15, and each frame can be made of stainless steel. It should be noted that the upper frame 12, the lower frame 13, the front frame 14 and the rear frame 15 are only relative relationships of relative positions, wherein the front frame 14 can be represented as a frame facing the pedestrian with the closest distance from the gate body 1. One end of the inclined plane 11 is connected with the upper frame 12, the other end is connected with the front frame 14, and the shape of the gate body 1 can be trapezoidal. Be provided with display screen 2 and identification module 3 on the inclined plane 11, display screen 2 sets up on identification module 3, and display screen 2 and identification module 3 embedding are installed on inclined plane 11. The inclination angle theta of the inclined plane 11 and the horizontal plane is as follows: theta is more than or equal to 30 degrees and less than or equal to 55 degrees. The horizontal plane may be represented as the ground plane and may also be represented as the plane of upper frame 12.

Through a plurality of use experiments, the inclination angle theta between the inclined plane 11 and the horizontal plane is as follows: theta is more than or equal to 30 degrees and less than or equal to 55 degrees, the identity recognition action (such as card swiping, code scanning and the like) of the pedestrian is smooth and convenient, and the pedestrian can grasp the identification card, thereby reducing the risk of falling of the identification card. The inclination angle θ of the inclined plane 11 to the horizontal plane may be 30 °, 35 °, 40 °, 45 °, 50 °, 55 °, and the like, and in a preferred embodiment, the inclination angle θ of the inclined plane 11 to the horizontal plane is: theta is more than or equal to 45 degrees and less than or equal to 55 degrees, the inclined angle is more appropriate, the use is convenient, and in addition, the appearance is attractive.

Referring to fig. 1 and 2, in a general embodiment, the identification module 3 includes a card swiping module 31 and/or a code scanning module 32, the card swiping module 31 may be a magnetic card (ID card) identification module or a radio frequency card (IC card) identification module, and the code scanning module 32 may be a two-dimensional code scanning module 32. The identity recognition module 3 may be a contact type or non-contact type identity recognition module 3, that is, the identity recognition module 3 may be a card swiping module 31, may also be a code scanning module 32, and may also exist in both the card swiping module 31 and the code scanning module 32. The card swiping module 31 and the code scanning module 32 are embedded and installed on the inclined plane 11, and the card swiping module 31 and the code scanning module 32 are transversely arranged.

Referring to fig. 2, in a general embodiment, the card swiping module 31 is electrically connected to the main control module, and the card swiping module 31 may also be embedded in the upper frame 12. The code scanning module 32 is electrically connected to the main control module, the code scanning module 32 can be embedded in the inclined plane 11, and the code scanning module 32 is disposed under the display screen 2.

Referring to fig. 2, the gate body 1 is a hollow frame structure, such as a trapezoid, and further includes a transparent partition 16, in order to prevent people from crossing the gate in the pedestrian passageway and disturbing the order, and the transparent partition 16 may be an acrylic plate. The transparent partition 16 is filled in the gate body 1, and the transparent gate 4 is rotated to open and close the formed passage as the only passage. In this embodiment, the transparent partition 16 may be fixedly connected to the inner sides of the upper frame 12, the lower frame 13, the front frame 14, and the rear frame 15.

In a general embodiment, the system further comprises a main control module and a transparent gate 4. A main control module is installed in the gate body 1, and the main control module can be a central controller, namely a CPU. Host system and transparent gate 4, display screen 2, identity identification module 3 electric connection, host system controls the rotation condition of transparent gate 4, the demonstration condition of display screen 2 according to the discernment condition of identity identification module 3, the rotatable middle part of connecting at floodgate machine body 1 of transparent gate 4.

Please refer to fig. 1 and fig. 2, further including a camera 5, wherein the camera 5 is electrically connected to the main control module, the camera 5 is used for obtaining face information, and the camera 5 is disposed in the middle of the upper frame 12. The camera 5 may be protrudingly provided at a central position of the upper frame 12.

Referring to fig. 2, in order to improve the aesthetic appearance and integrity of the gate, the transparent gate 4 is rotatably connected to the middle of the gate body 1 to form a rotating shaft 6, and an extension line extending upward from the rotating shaft 6 passes through the position of the camera 5. In the height direction, the rotating shaft 6 and the camera 5 are connected in height, and the top end of the transparent gate 4 and the top end of the camera 5 are at the same height, so that the transparent gate has a sense of unity.

Referring to fig. 2, the lighting device 51 may be disposed below the camera 5, and since the human face is on the top and the human body part such as the chest is on the bottom in the shooting picture of the camera 5, the lighting device 51 is disposed below the camera 5, on one hand, the ambient brightness is enhanced, and on the other hand, a light spot is formed below the camera 5. Since the face is on the top, even if the light spot is formed on the bottom, the face recognition efficiency of the camera 5 is not reduced.

Referring to fig. 1 and 2, in order to improve the utilization efficiency of face recognition, the camera 5 and the inclined plane 11 are disposed on the same side of the gate body 1, and the camera 5 may be disposed toward the inner side of the passageway of the pedestrian passageway gate. The pedestrian is when watching display screen 2, and the pedestrian can subconsciously lower the head towards display screen 2 slightly, and the people's face orientation this moment also just in time is towards camera 5, and camera 5 both can acquire pedestrian's face information fast and accurately, carries out face identification, has improved the speed and the efficiency that camera 5 acquireed the face.

Referring to fig. 1 and 2, in order to save electricity used by the pedestrian passageway gate and improve environmental protection and energy saving, the pedestrian passageway gate further includes a human body sensor 7 and a sensing light bar 71. The human body sensor 7 and the sensing light bar 71 are electrically connected with the main control module, the human body sensor 7 can be an infrared human body sensor 7, and the sensing light bar 71 can be an LED light bar. Human sensor 7, response lamp strip 71 set gradually on preceding frame 14, and preceding frame 14 is close pedestrian's position as people's bank of china passageway floodgate machine at first, can let human sensor 7 detect in advance whether the pedestrian is close to. The human body sensor 7 and the sensor light bar 71 are arranged at intervals in the height direction. When the human body sensor 7 detects that a pedestrian approaches the pedestrian passageway gate, the human body sensor 7 sends sensing information to the main control module, and the main control module can adjust the sensing light bar 71 from a sleep state to a working state, even if the sensing light bar 71 emits light. Meanwhile, the main control module can also control the functional modules such as the display screen 2, the camera 5, the card swiping module 31 and the code scanning module 32 to be adjusted from the sleep state to the working state.

Referring to fig. 2, the ratio of the height of the front frame 14 to the height of the rear frame 15 is 0.65-0.85, i.e. when the height of the front frame 14 is 0.65 m to 0.85 m, the height of the rear frame 15 is 1 m. Because the front end of the pedestrian passageway gate is provided with the inclined plane 11, the sum of the height of the inclined plane 11 and the height of the front frame 14 is equal to the height of the rear frame 15, namely when the height of the front frame 14 is 0.65-0.85 m, the height of the inclined plane 11 is 0.35-0.15 m correspondingly, and the height of the rear frame 15 is 1 m correspondingly. The inclined plane 11 can be regarded as a triangle, the higher the height of the inclined plane 11 is, the longer the inclined side of the inclined plane 11 is, the larger the screen of the mountable display screen 2 is, and the more the identity recognition modules 3 are.

In other embodiments, the pedestrian passageway gate comprises a left gate body 1 and a right gate body 1 which are matched to form a pedestrian passageway. Both the front frame 14 and the rear frame 15 of the gate body 1 may be provided with a bevel 11 to facilitate bidirectional use of the walkway gate.

The embodiment of the application provides a pedestrian passageway floodgate machine with transparent gate, the front end of its floodgate machine body 1 is provided with display screen 2, the middle part of floodgate machine body is provided with camera 5, adopt the structure of camera 5 and 2 separation of display screen, and in camera 5 and the structure of display screen 2 fully incorporate floodgate machine body 1, in whole appearance clean and tidy standard, and the potential safety hazard that does not have the clothing of catching up moreover, make things convenient for the pedestrian to use, security and whole aesthetic property have been improved.

The embodiment of the application provides a pedestrian passageway floodgate machine with transparent gate 4, its instruction banks 61 can shine transparent gate 4's side, light conducts and can land on indication area 41 in transparent gate 4, make indication area 41's luminance increase, luminous effect is obvious, indication area 41 can warn the pedestrian about transparent gate 4 open the door, the closure state, prevent that the pedestrian from hitting transparent gate 4 on the one hand, on the other hand has also protected the pedestrian, compare in current pedestrian passageway floodgate machine, the pedestrian passageway floodgate machine with transparent gate 4 that this application provided uses safelyr, reduce the possibility that the pedestrian collided transparent gate by mistake.

In the several embodiments provided in the present application, it should be understood that the functional modules in the respective embodiments may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.

Claims (10)

1. The utility model provides a pedestrian passageway floodgate machine with transparent gate, its characterized in that, includes floodgate machine body, transparent gate, instruction banks, axis of rotation, transparent gate rotates to be connected the middle part of floodgate machine body forms the axis of rotation, the axis of rotation extends the grip block along radial direction, the grip block is used for the centre gripping transparent gate suspends in subaerial, the instruction banks is accomodate the upper end of grip block, and shine to transparent gate, be provided with the instruction region on the transparent gate, the instruction region sets up on the irradiation direction of instruction banks.

2. The pedestrian passageway gate machine with the transparent gate according to claim 1, wherein the indicating lamp set comprises a plurality of first indicating lamps, and the plurality of first indicating lamps are arranged in the clamping plate in sequence along the height direction; when the gate valve works, the first indicating lamp irradiates a first color on the indicating area of the transparent gate.

3. The pedestrian passageway gate machine with the transparent gate of claim 2, wherein the indicating lamp set further comprises a second indicating lamp, and a plurality of the second indicating lamps and the first indicating lamps are adjacently arranged in the clamping plate along the height direction; when the gate valve works, the first indicator lamp irradiates a first color on the indicating area of the transparent gate, and the second indicator lamp irradiates a second color on the indicating area of the transparent gate.

4. The pedestrian passageway gate with transparent gate of claim 2, wherein the first indicator light is steady or flashing to illuminate the first color, the first color being one of yellow, green and red.

5. The pedestrian passageway gate with the transparent gate of claim 3, wherein the first indicator light is steady or flashing to illuminate a first color, the second indicator light is steady or flashing to illuminate a second color, the first color is one of green and red, and the second color is the other of green and red.

6. The pedestrian passageway gate machine with the transparent gate of claim 1, wherein the indicating lamp set transversely irradiates the side of the transparent gate, and the transparent gate is transversely provided with lines.

7. The pedestrian passageway gate machine with the transparent gate of claim 6, wherein the lines are a plurality of holes and grooves transversely formed on the indication area;

or the lines are frosted films attached to the indicating areas.

8. The pedestrian passageway gate machine with the transparent gate according to claim 1, further comprising a display screen and a camera, wherein the camera is fixedly connected above the rotating shaft, the camera is arranged on the gate body in a protruding manner, and the display screen is arranged at the front end of the gate body.

9. The pedestrian passageway gate with a transparent gate of claim 8, wherein a top end of the transparent gate is at the same height as a top end of the camera in a height direction.

10. The pedestrian passageway gate machine with the transparent gate as claimed in claim 8, wherein the gate machine body is of a frame-shaped structure, the gate machine body comprises an inclined plane, an upper frame, a lower frame, a front frame and a rear frame, the upper frame corresponds to the lower frame, the front frame corresponds to the rear frame, one end of the inclined plane is connected with the upper frame, the other end of the inclined plane is connected with the front frame, the display screen is arranged on the inclined plane, the display screen is embedded and mounted on the inclined plane, and the inclined angle θ between the inclined plane and the horizontal plane is: theta is more than or equal to 30 degrees and less than or equal to 55 degrees.

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