A light spot position sensor for aligning transport vehicles

Abstract

This invention discloses a light spot position sensor for aligning a transport vehicle, comprising a circuit board and N rows of photosensitive elements mounted on the circuit board, each row having multiple photosensitive elements arranged in a staggered manner. This invention can improve the detection accuracy of the photosensitive elements by utilizing the staggered arrangement of multiple rows of photosensitive elements to meet design requirements.

Description

Technical Field

[0001] This invention belongs to the field of optical sensor technology, and particularly relates to a light spot position sensor for aligning a transport vehicle. Background Technology

[0002] In the fields of automated logistics, warehousing, material transfer on production lines, and docking of special vehicles (such as AGVs and RGVs), the precise alignment of transport vehicles is a key link to ensure the safe, efficient, and reliable execution of subsequent automated operations (such as loading and unloading, charging, and precise positioning and docking).

[0003] Currently, the main technical solution for achieving alignment adjustment of transport vehicles uses laser rangefinders to measure the distance from a specific position on the vehicle to a fixed reference point. By calculating multiple measurements, the vehicle's attitude and positional deviation can be deduced. This method offers high accuracy but is expensive and has a relatively complex system configuration (requiring multiple sensors and sophisticated signal processing units). Its reliability and stability may also be affected in harsh industrial environments such as those with dust, oil, or strong light interference.

[0004] A photosensitive element is a component that converts light signals into electrical signals. When used in conjunction with a light-emitting diode (LED), it enables the conversion between electricity and light, and vice versa. Common photosensitive elements include photoresistors, photodiodes, and phototransistors.

[0005] The detection accuracy of a photosensitive element is inversely proportional to its size. Since photosensitive elements are generally large, they cannot meet the high-precision requirements when used as the photosensitive unit of a spot position sensor. Utility Model Content

[0006] In order to overcome the shortcomings of existing technologies, the purpose of this invention is to propose a light spot position sensor for aligning a transport vehicle, which uses one or more rows of photosensitive elements to improve the detection accuracy of the photosensitive elements to meet the design requirements.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a light spot position sensor for aligning a transport vehicle, comprising a circuit board and N rows of photosensitive elements mounted on the circuit board, each row having multiple photosensitive elements.

[0008] Furthermore, in a row of photosensitive elements, the center-to-center distance between adjacent photosensitive elements in the row is D, and the radius of the photosensitive element is R, where D≥2R.

[0009] Furthermore, the device includes a housing, wherein the photosensitive elements are arranged in the same direction as the extension direction of the housing, the circuit board is installed inside the housing, and one side of the housing is open, through which the photosensitive elements are exposed.

[0010] Furthermore, it also includes a filter glass, which is installed at the opening of the housing.

[0011] Furthermore, multiple rows of photosensitive elements are arranged in a staggered manner to improve the accuracy of spot position detection.

[0012] The beneficial effects of adopting this technical solution are:

[0013] This invention utilizes one or more rows of photosensitive elements to improve the detection accuracy of the photosensitive elements to meet design requirements, thereby ensuring the effective detection of the light spot position sensor. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a light spot position sensor for aligning a transport vehicle according to the present invention;

[0015] Figure 2 This is a diagram showing the arrangement of photosensitive elements in an embodiment of this utility model;

[0016] Figure 3 This is a cross-sectional view of a light spot position sensor used for aligning a transport vehicle, as described in an embodiment of this utility model.

[0017] Figure 4 This is a diagram illustrating the use of a light spot position sensor for aligning a transport vehicle, as described in an embodiment of this utility model.

[0018] Figure 5 This is a schematic diagram of the photosensitive component when the light spot position sensor illuminates the light in an embodiment of this utility model.

[0019] Among them, 1. photosensitive element; 2. circuit board; 3. housing; 4. filter glass; 5. light spot; 6. light spot emitter. Detailed Implementation

[0020] To make the purpose, technical solution and advantages of this utility model clearer, the present utility model will be further described below with reference to the accompanying drawings.

[0021] In this embodiment, see Figure 1 As shown, a spot position sensor for aligning a transport vehicle includes a circuit board 2 and N rows of photosensitive elements 1 mounted on the circuit board, each row having multiple photosensitive elements 1; where N is a positive integer.

[0022] As an optimization of the above embodiments, such as Figure 2 As shown, in a row of photosensitive elements, the center distance between adjacent photosensitive elements in the row is D, and the radius of the photosensitive element is R, where D≥2R.

[0023] As an optimization of the above embodiments, a light spot position sensor for aligning a transport vehicle, such as... Figure 3As shown, the device includes a housing 3, the photosensitive elements 1 are arranged in the same horizontal direction as the extension direction of the housing 3, the circuit board 2 is installed inside the housing 3, and one side of the housing 3 is open, through which the photosensitive elements 1 are exposed.

[0024] Preferably, it also includes a filter glass 4, which is installed at the opening of the housing 3.

[0025] As an optimization of the above embodiment, multiple rows of photosensitive elements 1 are arranged in a staggered manner to improve the accuracy of spot position detection.

[0026] like Figure 4-5 As shown, this utility model is used as follows:

[0027] On the adjacent surfaces of two synchronously moving coaxial transport vehicles, a spot position sensor is installed on one side and a spot emitter 6 is installed on the other side. The spot emitter 6 emits a spot that illuminates the photosensitive element 1 of the spot position sensor, and the spot position sensor collects the signal.

[0028] The laser emitter 6 emits a light spot 5, which is perpendicular to the ground. The light spot position sensor is horizontally arranged, and the light spot 5 illuminates the light spot position sensor to form a bright line. The photosensitive element 1 outputs an analog signal when illuminated, and the signal intensity increases with the increase of the light intensity. Among all the photosensitive elements 1 that receive light, the position of the photosensitive element 1 with the highest signal intensity is the position illuminated by the line laser. When the width of the light spot 5 exceeds the diameter of the photosensitive element 1, multiple photosensitive elements 1 will output analog signals with the highest intensity and the signal intensity will be very close. In this case, the center position of these photosensitive element 1 positions is taken as the position illuminated by the line laser.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A spot position sensor for aligning a transport vehicle, characterized in that, It includes a housing (3), a circuit board (2) and N rows of photosensitive elements (1) mounted on the circuit board, each row having multiple photosensitive elements (1); the photosensitive elements (1) are arranged in the same horizontal direction as the extension direction of the housing (3), the circuit board (2) is installed inside the housing (3), and one side of the housing (3) is open, through which the photosensitive elements (1) are exposed. In a row of photosensitive elements, the center-to-center distance between adjacent photosensitive elements in the row is D, and the radius of the photosensitive element is R, where D ≥ 2R.

2. The light spot position sensor for aligning a transport vehicle according to claim 1, characterized in that, It also includes a filter glass (4), which is installed at the opening of the housing (3).

3. A spot position sensor for aligning a transport vehicle according to claim 1 or 2, characterized in that, Multiple rows of photosensitive elements are arranged in a staggered manner (1).

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