Distance sensor without blind area detection

Abstract

A non-blind area detection distance sensor comprises a front shell, a rear shell and a diaphragm, the front shell is provided with a front positioning surface and a rear positioning surface, the diaphragm is embedded in the front positioning surface, and the rear shell is embedded in the rear positioning surface; a main control board, a transmitting lens and a receiving lens are further included, a mounting support is arranged in the front shell, and the main control board, the transmitting lens and the receiving lens are all fixedly connected to the mounting support; the main control board is provided with an emission light source and a receiver; the emission light source is arranged at the middle lower part of the main control board; the emission lens is arranged in front of the emission light source; the receiver is arranged at the middle upper part of the main control board; the receiving lens is arranged in front of the receiver; the diaphragm is further provided with a first reflecting surface and a second reflecting surface, the first reflecting surface is located on the upper left portion of the transmitting lens, and the second reflecting surface is located in front of the receiving lens. The non-blind area detection distance sensor can obviously reduce the blind area and realize the detection of the end which is extremely close to the shell.

Description

Technical Field

[0001] The utility model relates to the technical field of micro sensors, in particular to a distance sensor without blind area detection. Background Art

[0002] In the application of distance sensors, due to the position difference between the transmitting end and the receiving end, the emitted light cannot be reflected back to the receiving end at the near end, and there is an invalid part at the near end, so it is impossible to detect the presence of objects in this area, which is the so-called blind area. How to minimize the blind area of ​​the sensor is a technical problem that needs to be solved urgently. Summary of the invention

[0003] In order to solve the above technical problems, the utility model provides a distance sensor without blind spot detection, including a front shell, a rear shell, and a window piece, the front shell is provided with a front positioning surface and a rear positioning surface, the window piece is embedded in the front positioning surface, and the rear shell is embedded in the rear positioning surface;

[0004] It also includes a main control board, a transmitting lens and a receiving lens. A mounting bracket is arranged inside the front shell, and the main control board, the transmitting lens and the receiving lens are all fixedly connected to the mounting bracket;

[0005] The main control board is provided with a transmitting light source and a receiver; the transmitting light source is arranged in the middle and lower part of the main control board, and the transmitting lens is located in front of the transmitting light source; the receiver is arranged in the middle and upper part of the main control board, and the receiving lens is located in front of the receiver;

[0006] The window piece is also provided with a first reflecting surface and a second reflecting surface. The first reflecting surface is located at the upper left of the emitting lens, and the second reflecting surface is located in front of the receiving lens.

[0007] Furthermore, the distance sensor without blind spot detection also includes a shading film and a polarizing plate. The window plate is provided with a mounting groove, and the shading film and the polarizing plate are mounted in the mounting groove.

[0008] Furthermore, the shading film is provided with a light-through hole, and the light-through hole is located in front of the emitting lens.

[0009] Furthermore, the shading film is a black shading film.

[0010] Furthermore, the light hole is rectangular.

[0011] Furthermore, both the transmitting lens and the receiving lens are aspherical lenses.

[0012] Furthermore, a transmitting lens is used to concentrate the light.

[0013] Furthermore, polarizers are used to select light with a set phase.

[0014] Furthermore, the polarizing plate is adhered to the window plate by adhesive.

[0015] Furthermore, the first reflection surface and the second reflection surface are both inclined reflection structures.

[0016] Compared with the prior art, the beneficial effect of the utility model is that the distance sensor with no blind spot detection of the utility model can break through the limitations of conventional design. Only by optimizing the structure, the blind spot can be significantly reduced, and detection very close to the shell end can be achieved. The actual effect of the product is obvious, and the application scenarios are more flexible and changeable, which is convenient for promotion and application in the industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Shown is a cross-sectional view of a distance sensor without blind spot detection of the present application;

[0018] Figure 2 Shown Figure 1 A local enlarged view of the dotted circle area;

[0019] Figure 3 Shown is a front view of a distance sensor without blind spot detection in the present application;

[0020] Figure 4 Shown are the front view and rear view of the distance sensor window piece without blind spot detection of the present application;

[0021] 1. Front shell; 2. Window piece; 3. Shading film; 4. Polarizer; 5. Receiving lens; 6. Transmitting lens; 7. Main control board; 8. Object to be measured; 9. Back shell; 11. Mounting bracket; 21. First reflecting surface; 22. Second reflecting surface; 23. Mounting slot; 31. Light hole; 71. Receiver; 72. Transmitting light source. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0023] According to the first aspect of the present invention, Figure 1-4 As shown, a distance sensor with no blind spot detection is provided, comprising a front shell 1, a rear shell 9, and a window piece 2, wherein the front shell 1 is provided with a front positioning surface and a rear positioning surface, the window piece 2 is embedded in the front positioning surface, and the rear shell 9 is embedded in the rear positioning surface;

[0024] It also includes a main control board 7, a transmitting lens 6 and a receiving lens 5. A mounting bracket 11 is provided inside the front shell 1, and the main control board 7, the transmitting lens 6 and the receiving lens 5 are all fixedly connected to the mounting bracket 11;

[0025] The main control board 7 is provided with an emitting light source 72 and a receiver 71; the emitting light source 72 is provided at the middle and lower part of the main control board 7, and the emitting lens 6 is located in front of the emitting light source 72; the receiver 71 is provided at the middle and upper part of the main control board 7, and the receiving lens 5 is located in front of the receiver 71;

[0026] The window piece 2 is further provided with a first reflecting surface 21 and a second reflecting surface 22 . The first reflecting surface 21 is located at the upper left of the emitting lens 6 , and the second reflecting surface 22 is located in front of the receiving lens 5 .

[0027] A distance sensor with no blind spot detection includes a front shell 1, a rear shell 9, and a window piece 2. The front shell 1 is provided with a front positioning surface and a rear positioning surface. The window piece 2 is embedded in the front positioning surface, and the rear shell 9 is embedded in the rear positioning surface. In this way, the front shell 1, the window piece 2 and the rear shell 9 form a cavity for accommodating the precision components inside the sensor, which can not only play a waterproof and dustproof protection role, but also strengthen the structural strength of the front shell 1, and prevent the mounting bracket 11 and the precision components inside the front shell 1 from being deformed or displaced, thereby affecting the detection accuracy of the sensor. It also includes a main control board 7, a transmitting lens 6 and a receiving lens 5. A mounting bracket 11 is provided inside the front shell 1, and the main control board 7, the transmitting lens 6, and the receiving lens 5 are all fixedly connected to the mounting bracket 11; the mounting bracket 11 is pre-designed, and a mounting position is reserved for the main control board 7, the transmitting lens 6 and the receiving lens 5, so that the main control board 7, the transmitting lens 6 and the receiving lens 5 can be fixedly connected to the mounting bracket 11, thereby ensuring the stability of the designed optical path. The main control board 7 is provided with an emitting light source 72 and a receiver 71; the emitting light source 72 is arranged in the middle and lower part of the main control board 7, and the emitting lens 6 is located in front of the emitting light source 72; the receiver 71 is arranged in the middle and upper part of the main control board 7, and the receiving lens 5 is located in front of the receiver 71; the emitting light source 72 can emit detection light, and the light is concentrated by the emitting lens 6. If there is an object 8 to be detected within the detection distance, the surface of the object 8 to be detected will diffusely reflect the light back, and then it will be received by the receiver 71 after being converged by the receiving lens 5, thereby determining that there is an object within the detection distance. The window piece 2 is also provided with a first reflecting surface 21 and a second reflecting surface 22, the first reflecting surface 21 is located at the upper left of the transmitting lens 6, and the second reflecting surface 22 is located in front of the receiving lens 5; when the object to be measured is particularly close to the distance sensor, due to the position difference between the transmitting end and the receiving end, the emitted light cannot be reflected back to the receiving end at the near end position, but is diffusely reflected to the vicinity of the transmitting lens 6 along an approximately original path. Therefore, the first reflecting surface 21 is arranged at the upper left of the transmitting lens 6 to collect part of the light diffusely reflected back by the near-end object to be measured, and then after adjusting the angle by the second reflecting surface 22, the light enters the receiving lens 5 arranged almost vertically to the reflecting lens in parallel, and is finally received by the receiver 71 on the main control board 7, thereby solving the technical problem of the blind spot at the near end position of the distance sensor.

[0028] The utility model sets a first reflecting surface 21 and a second reflecting surface 22 inside the distance sensor, so that the light diffusely reflected back by the near-end object can also be received by the receiver 71, thereby eliminating the blind area of ​​the distance sensor and improving the detection accuracy of the distance sensor.

[0029] Furthermore, the distance sensor without blind spot detection further includes a shading film 3 and a polarizing film 4 . The window sheet 2 is provided with a mounting groove 23 , and the shading film 3 and the polarizing film 4 are mounted in the mounting groove 23 .

[0030] The distance sensor for non-blind spot detection also includes a shading film 3 and a polarizing plate 4. The shading film 3 is used to block interference from external light, and the polarizing plate 4 is used to select light in a specific direction to pass through, which can also avoid interference from external light and improve detection accuracy.

[0031] Furthermore, the light shielding film 3 is provided with a light through hole 31 , and the light through hole 31 is located in front of the emitting lens 6 .

[0032] The light shielding film 3 is provided with a light through hole 31 , which is located in front of the emitting lens 6 , and is used for the detection light emitted by the emitting light source 72 to pass through the light through hole 31 .

[0033] Furthermore, the light-shielding film 3 is a black light-shielding film 3 .

[0034] The light-shielding film 3 is a black light-shielding film 3 , which can shield most of the external light and prevent the external light from affecting the detection accuracy.

[0035] Furthermore, the light-through hole 31 is rectangular.

[0036] Rectangle is one of the most common shapes and is easy to process.

[0037] Furthermore, both the transmitting lens 6 and the receiving lens 5 are aspherical lenses.

[0038] Both the transmitting lens 6 and the receiving lens 5 are aspherical transparent bodies, which have a better curvature radius and can maintain good aberration correction to obtain the required performance. The application of aspherical lenses brings excellent sharpness and higher resolution, and makes it possible to miniaturize the lens.

[0039] Furthermore, the emission lens 6 is used to concentrate the light.

[0040] The emitting lens 6 is used to concentrate light. The more concentrated the light emitted by the sensor is, the better the effect of designing the light path will be. Therefore, the emitting lens 6 is used to concentrate light before emitting the light source 72.

[0041] Furthermore, the polarizer 4 is used to select the light with a set phase.

[0042] Polaroid 4 is a type of optical device that filters light. It can selectively pass or block polarized light in a certain direction, while eliminating light in another direction. The working principle of polaroid 4 is based on the characteristics of polarized light, which is light that vibrates only in a certain direction. By gating polaroid 4, interference from external light can be eliminated to ensure the accuracy of detection.

[0043] Furthermore, the polarizing plate 4 is adhered to the window plate 2 by adhesive.

[0044] The polarizing plate 4 is adhered to the window plate 2 by adhesive, so that the polarizing plate 4 can provide a stable polarization effect.

[0045] Furthermore, the first reflecting surface 21 and the second reflecting surface 22 are both inclined reflecting structures.

[0046] The first reflecting surface 21 and the second reflecting surface 22 are both inclined reflecting structures and the angles are specially designed, so that the diffuse reflected light returning in an approximately straight line can be translated upward for a certain distance, so that it can be better received by the receiver 71, thereby improving the detection accuracy of the distance sensor without blind spot detection.

[0047] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0048] In the description of the present invention, it should be understood that the terms "top", "bottom", "upper", "lower" (if any), etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0050] The terms "first" and "second" in the specification and claims of the present application and the above-mentioned figure descriptions are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A distance sensor without blind spot detection, characterized in that: It comprises a front shell (1), a rear shell (9), and a window piece (2), wherein the front shell (1) is provided with a front positioning surface and a rear positioning surface, the window piece (2) is embedded in the front positioning surface, and the rear shell (9) is embedded in the rear positioning surface; It also comprises a main control board (7), a transmitting lens (6) and a receiving lens (5); a mounting bracket (11) is arranged inside the front shell (1); the main control board (7), the transmitting lens (6) and the receiving lens (5) are all fixedly connected to the mounting bracket (11); The main control board (7) is provided with a transmitting light source (72) and a receiver (71); the transmitting light source (72) is arranged at the middle and lower part of the main control board (7), and the transmitting lens (6) is located in front of the transmitting light source (72); the receiver (71) is arranged at the middle and upper part of the main control board (7), and the receiving lens (5) is located in front of the receiver (71); The window sheet (2) is also provided with a first reflecting surface (21) and a second reflecting surface (22), wherein the first reflecting surface (21) is located at the upper left of the transmitting lens (6), and the second reflecting surface (22) is located in front of the receiving lens (5).

2. The distance sensor with no blind spot detection according to claim 1, characterized in that: The distance sensor for non-blind-area detection further comprises a light-shielding film (3) and a polarizing film (4); the window sheet (2) is provided with a mounting groove (23); and the light-shielding film (3) and the polarizing film (4) are mounted in the mounting groove (23).

3. The distance sensor with no blind spot detection according to claim 2, characterized in that: The light shielding film (3) is provided with a light through hole (31), and the light through hole (31) is located in front of the emitting lens (6).

4. The distance sensor with no blind spot detection according to claim 2, characterized in that: The light-shielding film (3) is a black light-shielding film (3).

5. The distance sensor with no blind spot detection according to claim 3, characterized in that: The light-through hole (31) is rectangular.

6. The distance sensor with no blind spot detection according to claim 1, characterized in that: The transmitting lens (6) and the receiving lens (5) are both aspherical lenses.

7. The distance sensor with no blind spot detection according to claim 1, characterized in that: The emission lens (6) is used to concentrate light.

8. The distance sensor with no blind spot detection according to claim 2, characterized in that: The polarizer (4) is used to select light with a set phase.

9. The distance sensor with no blind spot detection according to claim 2, characterized in that: The polarizing plate (4) is adhered to the window plate (2) by means of adhesive.

10. The distance sensor with no blind spot detection according to claim 1, characterized in that: The first reflecting surface (21) and the second reflecting surface (22) are both inclined reflecting structures.

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