Method for testing and determining distance between light source and light-transmitting material for elevator

Abstract

The invention discloses a method for testing and determining the distance between a light source for an elevator and a light-transmitting material, and the method is realized based on a system for testing the distance between the light source for the elevator and the light-transmitting material. The elevator light source and light-transmitting material distance test system comprises a test chamber, a mounting rack, a light-transmitting plate, a lifting seat, a lifting driving device, an ambient light intensity sensor, a camera and a control box, the test chamber is a sealed space for preventing an elevator car, the mounting rack is mounted at the top of the test chamber, and the light-transmitting plate is mounted on the mounting rack. The method for testing and determining the distance between the light source and the light-transmitting material for the elevator solves the problem that the optimal distance between the light source and the light-transmitting plate cannot be automatically tested in the prior art.

Description

Technical Field

[0001] The present invention relates to the field of elevators, and particularly to a method for testing and determining the distance between a light source and a light-transmitting material for an elevator. Background Art

[0002] An elevator car includes: a box body, a light source, and a light-transmitting plate. The light source is installed on the inner top wall of the box body, and the light-transmitting plate is installed on the box body. The light-transmitting plate is made of a light-transmitting material. When in use, the light source emits light, and the light-transmitting plate transmits the light, thereby achieving the lighting effect.

[0003] In the production of elevator cars, it is difficult to notice the distance between the light source and the light-transmitting plate. However, the following problems are found after production: 1) The distance between the light source and the light-transmitting plate is too large, which will cause the light intensity in the entire box body to be insufficient; 2) The distance between the light source and the light-transmitting plate is too small, resulting in the light source leaking out through the light-transmitting plate, making the appearance of the inner top wall of the elevator car not good-looking. How to automatically test the optimal distance between the light source and the light-transmitting plate is an urgent problem to be solved in this application. Summary of the Invention

[0004] The present invention aims to provide a method for testing and determining the distance between a light source and a light-transmitting material for an elevator, so as to solve the problem in the prior art that the optimal distance between the light source and the light-transmitting plate cannot be automatically tested.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] The present invention discloses a method for determining the distance between a light source and a light-transmitting material for an elevator. The method for determining the distance between the light source and the light-transmitting material for the elevator is implemented based on a distance test system for the light source and the light-transmitting material for the elevator. The distance test system for the light source and the light-transmitting material for the elevator includes: a test chamber, a mounting rack, a light-transmitting plate, a lifting seat, a lifting driving device, an ambient light intensity sensor, a camera, and a control box. The test chamber is an airtight space for an elevator car. A mounting rack is installed on the top of the test chamber. A light-transmitting plate is installed on the mounting rack. The light-transmitting plate is made of a light-transmitting material. A lifting seat is installed above the light-transmitting plate. The lifting seat is connected to the output end of the lifting driving device. A light source strip to be tested is installed on the lifting seat. A control box is installed on the bottom surface of the test chamber. An ambient light intensity sensor and a camera facing the light-transmitting plate are installed outside the control box. The lifting driving device, the ambient light intensity sensor, and the camera are all electrically connected to the control box. The method for determining the distance between the light source and the light-transmitting material for the elevator includes the following steps: S1. Preparation before testing: Install the light-transmitting plate on the mounting rack and install the light source strip to be tested on the lifting seat; S2. The control box controls the operation of the lifting driving device, the ambient light intensity sensor, and the camera, and obtains operation data. The operation data includes: D, P, and G. D represents the distance between the light-transmitting plate and the light source strip to be tested, P represents the ambient light intensity in the test chamber, and G represents the photo data of the light-transmitting plate obtained by the camera; S3. The control box determines the optimal distance D0 between the light source strip to be tested and the light-transmitting plate according to the operation data.

[0007] Preferably, S2 includes the following steps:

[0008] S21. Let i = 1;

[0009] S22. The control box controls the operation of the lifting driving device so that the distance between the light-transmitting plate and the light source strip to be tested is d i ;

[0010] S23. The ambient light intensity sensor obtains the ambient light intensity p in the test chamber i , and the camera obtains the photo data g of the light-transmitting plate i ;

[0011] S24. The ambient light intensity sensor transmits the ambient light intensity p in the test chamber i to the control box, and the camera transmits the photo data g of the light-transmitting plate i to the control box;

[0012] S25. The control box stores d i into the set D, stores p i into the set P, and stores g i into the set P;

[0013] S26. Calculate i = i + 1;

[0014] S27. Determine whether i is greater than the set value N. If so, repeat steps S22 to S25; if not, execute step S27;

[0015] S28. End.

[0016] Preferably, step S3 includes the following steps:

[0017] S31. Let the light-transmitting plate photo data g i contain image data (x j , y j , grey j ), and the image data (x j , y j , grey j ) represents that the gray value at the pixel (x j , y j ) is grey j ;

[0018] S32. Calculate the average gray value i of all gray values grey j in each light-transmitting plate photo data g

[0019] S33. Calculate the gray value ratio k g ;

[0020] S34. Calculate the light intensity deviation k p , where p0 represents the most suitable test indoor ambient light intensity;

[0021] S35. Calculate the score w, and the formula is: w = ak g + bk p , where a and b are constants in the formula;

[0022] S36. By comparing the scores w corresponding to each d i , the d i with the lowest score w is the best distance D0.

[0023] Preferably, step S32 includes the following steps:

[0024] S321. Find all pixel points in each light-transmitting plate photo data g i whose gray values are greater than the first set value grey0, Δg is a set value and is stored as a large gray value pixel set;

[0025] S322. Calculate the total gray value Z g of all pixels with large gray values, and Z g is equal to the gray values of all pixels in the large gray value pixel set;

[0026] S323. Calculate the average gray value of all pixels with large gray values.

[0027] S324. Calculate the proportion k of gray values. g , the formula is:

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] In the present application, first, a test chamber that simulates the box in the elevator car is used. The test chamber can be opened and closed like the box in the elevator car, avoiding the influence of external natural light on the light intensity detection and improving the detection accuracy. Then, a lifting seat and a lifting drive device above the light-transmitting plate are designed. The light source strip to be tested is installed on the lifting seat, so that the distance d between the light source strip to be tested and the light-transmitting plate can be controlled during the detection process. i , so as to obtain the optimal distance D0 between the light source strip to be tested and the light-transmitting plate for subsequent debugging. At the same time, an ambient light intensity sensor is designed to obtain the indoor ambient light intensity, and a camera is also designed to obtain the photo data of the light-transmitting plate. The indoor ambient light intensity and the photo data of the light-transmitting plate (through which it can be judged whether the light-transmitting plate will transmit the light source strip to be tested) provide a basis for obtaining the optimal distance D0 between the light source strip to be tested and the light-transmitting plate.

[0030] Other advantages, objectives and features of the present invention will be partially reflected by the following description and partially understood by those skilled in the art through the research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic structural diagram of the distance test system for the light source and the light-transmitting material for elevators after being cut open.

[0032] Reference numerals: test chamber 1, mounting bracket 2, light-transmitting plate 3, lifting seat 4, lifting drive device 5, ambient light intensity sensor 6, camera 7, control box 8, light source strip to be tested 9. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] In order to make the technical means, creative features, achieved objectives and functions of the present invention clearer and easier to understand, the present invention will be further described below in conjunction with the drawings and specific embodiments:

[0034] As Figure 1As shown in the figure, the present invention discloses a method for determining the distance between a light source and a light-transmitting material for an elevator. The method for determining the distance between the light source and the light-transmitting material for the elevator is realized based on a test system for the distance between the light source and the light-transmitting material for the elevator. The test system for the distance between the light source and the light-transmitting material for the elevator includes: a test chamber 1, a mounting frame 2, a light-transmitting plate 3, a lifting seat 4, a lifting driving device 5, an ambient light intensity sensor 6, a camera 7, and a control box 8. The test chamber 1 is an enclosed space for preventing the elevator car. The mounting frame 2 is installed on the top of the test chamber 1. The light-transmitting plate 3 is installed on the mounting frame 2. The light-transmitting plate 3 is made of a light-transmitting material. A lifting seat 4 is installed above the light-transmitting plate 3. The lifting seat 4 is connected to the output end of the lifting driving device 5. A light source strip to be tested 9 is installed on the lifting seat 4. The control box 8 is installed on the bottom surface of the test chamber 1. The ambient light intensity sensor 6 and the camera 7 facing the light-transmitting plate 3 are installed outside the control box 8. The lifting driving device 5, the ambient light intensity sensor 6, and the camera 7 are all electrically connected to the control box 8. The method for determining the distance between the light source and the light-transmitting material for the elevator includes the following steps: S1. Preparation before testing: Install the light-transmitting plate on the mounting frame and install the light source strip to be tested on the lifting seat; S2. The control box controls the operation of the lifting driving device, the ambient light intensity sensor, and the camera, and obtains the operation data. The operation data includes: D, P, and G. D represents the distance between the light-transmitting plate and the light source strip to be tested, P represents the ambient light intensity in the test chamber, and G represents the photo data of the light-transmitting plate obtained by the camera; S3. The control box determines the optimal distance D0 between the light source strip to be tested and the light-transmitting plate according to the operation data.

[0035] S2 includes the following steps:

[0036] S21. Let i = 1;

[0037] S22. The control box controls the operation of the lifting driving device so that the distance between the light-transmitting plate and the light source strip to be tested is d i ;

[0038] S23. The ambient light intensity sensor obtains the ambient light intensity p in the test chamber i , and the camera obtains the photo data g of the light-transmitting plate i ;

[0039] S24. The ambient light intensity sensor transmits the ambient light intensity p in the test chamber i to the control box, and the camera transmits the photo data g of the light-transmitting plate i to the control box;

[0040] S25. The control box stores d i into the set D, stores p i into the set P, and stores g i into the set P;

[0041] S26. Calculate i = i + 1;

[0042] S27. Determine whether i is greater than the set value N. If so, repeat steps S22 to S25; if not, execute step S27.

[0043] S28. End.

[0044] Step S3 includes the following steps:

[0045] S31. Set the light-transmitting plate photo data g i to include image data (x j , y j , grey j ). The image data (x j , y j , grey j ) indicates that the gray value at pixel (x j , y j ) is grey j .

[0046] S32. Calculate the average gray value of all gray values grey i in each light-transmitting plate photo data g j .

[0047] S33. Calculate the gray value ratio k g .

[0048] S34. Calculate the light intensity deviation k p , where p0 represents the most suitable indoor environmental light intensity for testing.

[0049] S35. Calculate the score w, and the formula is: w = ak g + bk p , where a and b are constants in the formula.

[0050] S36. By comparing the scores w corresponding to each d i , the d i with the lowest score w is the optimal distance D0.

[0051] Before executing step S31, first determine whether the indoor environmental light intensity p i corresponding to the light-transmitting plate photo data g i is greater than the second set value (this second set value corresponds to the minimum light intensity required in the test room). If so, perform step S31; if not, end and output the result that this distance does not meet the requirements.

[0052] Preferably, step S32 includes the following steps:

[0053] S321. Find all the pixel points in the photo data g of each transparent plate i where the gray value is greater than the first set value grey0, Δg is the set value and is stored as the set of pixels with large gray values; Δg is when the pixel gray values corresponding to some non-light sources to be tested deviate from the average gray value during shooting , and the pixel gray values corresponding to the light sources to be tested are screened out through grey0, reducing the slightly increased pixel gray values corresponding to the non-light sources to be tested and g improving the accuracy of the calculation of the gray value ratio k g of the gray value;

[0054] S322. Calculate the total gray value Z of all pixels with large gray values g , Z g is equal to the gray values of all pixels in the set of pixels with large gray values;

[0055] S323. Calculate the average gray value of all pixels with large gray values

[0056] S324. Calculate the gray value ratio k g , and the formula is:

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not restrictive. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A method for testing and determining the distance between a light source and a light-transmitting material for an elevator, characterized in that: The method for determining the distance between the light source and the light-transmitting material for an elevator is implemented based on a test system for the distance between the light source and the light-transmitting material for an elevator. The test system for the distance between the light source and the light-transmitting material for an elevator includes: a test room, a mounting frame, a light-transmitting plate, a lifting seat, a lifting drive device, an ambient light intensity sensor, a camera, and a control box. The test room is a closed space for an elevator car. A mounting frame is installed on the top of the test room. A light-transmitting plate is installed on the mounting frame. The light-transmitting plate is made of a light-transmitting material. A lifting seat is installed above the light-transmitting plate. The lifting seat is connected to the output end of the lifting drive device. A light source belt to be tested is installed on the lifting seat. A control box is installed on the bottom surface of the test room. An ambient light intensity sensor and a camera facing the light-transmitting plate are installed outside the control box. The lifting drive device, the ambient light intensity sensor, and the camera are all electrically connected to the control box. The method for testing and determining the distance between the light source and the light-transmitting material for an elevator includes the following steps: S1. Preparation before testing: install the light-transmitting plate on the mounting frame and install the light source belt to be tested on the lifting seat; S2, the control box controls the operation of the lifting drive device, the ambient light intensity sensor and the camera, and obtains the operation data, the operation data includes: D, P and G, D represents the distance between the light-transmitting plate and the light source to be tested, P represents the ambient light intensity in the test room, and G represents the photo data of the light-transmitting plate obtained by the camera; S3. The control box determines the optimal distance D0 between the light source strip to be tested and the light-transmitting plate according to the operating data.

2. The method for testing and determining the distance between a light source and a light-transmitting material for an elevator according to claim 1, characterized in that: S2 includes the following steps: S21, i=1; S22, the control box controls the lifting drive device to operate so that the distance between the light-transmitting plate and the light source belt to be tested is d i ; S23, the ambient light intensity sensor obtains the ambient light intensity p in the test room i , the camera obtains the photo data g of the light-transmitting plate i ; S24, the ambient light intensity sensor will test the indoor ambient light intensity p i Transmitted to the control box, the camera obtains the photo data of the light-transmitting plate g i Transmit to the control box; S25, control box will d i Store it in set D and store p i Store it in set P, and store g i Store into set P; S26, calculating i=i+1; S27, determine whether i is greater than a set value N, if yes, repeat steps S22 to S25; if no, execute step S27; S28, end.

3. The method for testing and determining the distance between a light source and a light-transmitting material for an elevator according to claim 2, characterized in that: Step S3 includes the following steps: S31, set the light-transmitting plate photo data g i Contains image data (x j ,y j , grey j ), image data (x j ,y j , grey j ) represents pixels (x j ,y j ) is gray j ; S32, calculate each light-transmitting plate photo data g i In the grayscale value grey j The average gray value S33, calculate the gray value ratio k g ; S34. Calculate the light intensity deviation k p , p0 represents the most suitable indoor ambient light intensity for testing; S35. Calculate the score w, the formula is: w = ak g +bk p , where a and b are constants; S36, by comparing each d i The corresponding score w, score w for low d i is the optimal distance D0.

4. The method for testing and determining the distance between a light source and a light-transmitting material for an elevator according to claim 3, characterized in that: Step S32 includes the following steps: S321, find out each light-transmitting plate photo data g i All pixels whose grayscale values ​​are greater than the first set value grey0, Δg is the set value, which is stored as a set of pixels with large gray values; S322, calculate the total gray value Z of all pixels with large gray values g , Z g Equal to the grayscale values ​​of all pixels in the large grayscale value pixel set; S323, calculate the average gray value of all pixels with large gray values S324, calculate the gray value ratio k g , the formula is:

Images