Method for storing different magnifications and automatically setting boundary strength

Abstract

The application discloses a method capable of storing different magnifications and automatically setting boundary strength, adopts a projection system, and comprises a workbench, an objective lens, a projection screen, a frontmost mirror and a last mirror; the objective lens comprises a mounting seat and a lens; a plurality of sensing elements are arranged on the mounting seat, the sensing elements are connected with an edge trigger controller, a trigger element is arranged on the lens, and the trigger element automatically triggers the corresponding sensing element after the lens is mounted on the mounting seat, so that the edge trigger controller automatically distinguishes the magnification of the lens, a plurality of different magnifications are preset and stored, and corresponding boundary strengths are respectively set; during operation, the corresponding boundary strengths are automatically adjusted according to the lens with different magnifications, manual setting is not needed, the setting magnification is avoided to be forgotten, and the edge detector is used in combination to automatically enable the edge detector to perform edge detection by using different threshold values according to different magnifications, so that the precision and convenience are considered.

Description

Technical Field

[0001] This invention relates to the field of projection systems, and in particular to a method for storing different magnifications and automatically setting boundary intensity. Background Technology

[0002] A measuring projector, also known as an optical projection measuring instrument or optical projection comparator, is a measuring instrument that uses the principle of optical projection to project the contour or surface of the workpiece being measured onto an observation screen for measurement or comparison. It can efficiently detect the contours and surface shapes of workpieces with various complex shapes. It mainly consists of three parts: an optical path system and a worktable. Measuring projectors can efficiently detect the contours and surface shapes of workpieces with various complex shapes, such as templates, stamped parts, cams, threads, gears, forming files, taps, and various cutting tools and parts. This instrument is widely used in metrology rooms and workshops of factories and mines in the machinery manufacturing, instrumentation, and watchmaking industries.

[0003] With the continuous advancement of science and technology and the rapid development of industrial production, people are able to manufacture more precise and smaller products. The requirements for testing these precise and small items are also getting higher and higher, and professional measuring projectors are generally used for measurement.

[0004] To improve the accuracy of measurement and projected images, lenses with different magnifications are needed for workpieces of different sizes. In existing technology, after lens replacement, the lens magnification needs to be manually set by the edge trigger controller of the projection system. It cannot automatically set boundary intensity or store light intensities at different magnifications. Forgetting to set the magnification will lead to a decrease in measurement accuracy, causing inconvenience to the measurement operation. Therefore, it is necessary to improve the current projection system. Summary of the Invention

[0005] In view of this, the present invention addresses the deficiencies of the existing technology, and its main objective is to provide a method that can store different magnifications and automatically set the boundary intensity, which can effectively solve the problem that the existing projection system requires manual setting of the lens magnification, causing inconvenience to the measurement operation.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A method for storing different magnifications and automatically setting boundary intensity employs a projection system. The projection system includes a worktable, an objective lens, a projection screen, a front reflector, and an outer reflector. The objective lens faces the worktable. Both the front and outer reflectors are located inside the projection screen. The front reflector reflects the light signal from the objective lens to the outer reflector, and the outer reflector reflects the light signal from the front reflector to the inner surface of the projection screen. The outer reflector has a light-transmitting hole, and an edge finder is located on the outer side of its reverse side. The edge finder is connected to an edge trigger controller and has a photoelectric sensor facing the light-transmitting hole. The objective lens includes a mounting base and a lens. The mounting base has multiple sensing elements connected to the edge trigger controller. The lens is detachably mounted on the mounting base and has triggering elements for triggering the corresponding sensing elements. The number and / or position of the triggering elements differ for lenses with different magnifications.

[0008] It includes the following steps:

[0009] (1) Install lenses of different magnifications one by one onto the mounting base, and set the boundary intensity on the edge trigger controller. Lenses of different magnifications correspond to different light intensities. Create a table and store it in the edge trigger controller.

[0010] (2) When measuring, select a lens with appropriate magnification, install the lens on the mounting base, and the trigger element on the lens will trigger the corresponding sensing element. The edge trigger controller will automatically determine the magnification of the lens and automatically retrieve the corresponding parameters from the table, and automatically set the corresponding boundary strength for measurement.

[0011] As a preferred embodiment, the sensing element is a contact point, a Hall element, a photoelectric element, a proximity switch, or a touch switch.

[0012] As a preferred embodiment, the proximity switch is a capacitive proximity switch or an electromagnetic proximity switch.

[0013] As a preferred embodiment, the plurality of sensing elements are arranged at intervals around the central axis of the mounting base.

[0014] As a preferred approach, each lens should have at least three edge strength values: full darkness, full brightness, and intermediate value, with the intermediate value being half the sum of the full darkness and full brightness values.

[0015] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution:

[0016] By installing multiple sensing elements on the mounting base, all of which are connected to an edge trigger controller, and in conjunction with trigger elements on the lens, once the lens is installed on the mounting base, the trigger elements automatically activate the corresponding sensing elements. This allows the edge trigger controller to automatically determine the lens magnification, pre-set and store multiple different magnifications, and set corresponding boundary strengths for each. During operation, the system automatically retrieves the preset boundary strength based on the lens magnification, eliminating the need for manual setting and preventing the loss of magnification settings. When used in conjunction with an edge finder, it can automatically use different thresholds for edge detection based on different magnifications, achieving a balance between accuracy and convenience.

[0017] To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a preferred embodiment of the present invention.

[0019] Explanation of reference numerals in the attached diagram:

[0020] 10. Worktable; 20. Objective lens

[0021] 21. Mounting base 22. Lens

[0022] 23. Sensing element 24. Triggering element

[0023] 30, projection screen; 40, frontmost reflector

[0024] 50. Ending reflector; 51. Light-transmitting aperture

[0025] 60. Workpiece 70. Edge trigger controller

[0026] 80. Edge finder; 81. Photoelectric sensor. Detailed Implementation

[0027] This invention discloses a method for storing different magnifications and automatically setting boundary intensity, employing a projection system, such as... Figure 1 As shown, the projection system includes a worktable 10, an objective lens 20, a projection screen 30, a frontmost reflector 40, and a rearmost reflector 50.

[0028] The worktable 10 is used to place the workpiece 60. The objective lens 20 faces the worktable 10. The objective lens 20 includes a mounting base 21 and a lens 22. The mounting base 21 is provided with a plurality of sensing elements 23. The plurality of sensing elements 23 are all connected to an edge trigger controller 70, which is a DSP processor. The lens 22 is detachably mounted on the mounting base 21. The lens 22 has trigger elements 24 for triggering the corresponding sensing elements 23. The number and / or position of the trigger elements 24 on lenses 22 with different magnifications are different. In this embodiment, the lens 22 is snapped onto the mounting base 21. The sensing elements 23 are contact points, Hall elements, photoelectric elements, proximity switches, or touch switches, etc., and are not limited to any particular type. The proximity switch is a capacitive proximity switch or an electromagnetic proximity switch. Furthermore, the plurality of sensing elements 23 are arranged at intervals around the central axis of the mounting base 21.

[0029] The foremost reflector 40 and the last reflector 50 are both located inside the projection screen 30. The foremost reflector 40 reflects the light signal from the objective lens 20 to the last reflector 50, and the last reflector 50 reflects the light signal from the foremost reflector 40 to the inner surface of the projection screen 30. The last reflector 50 is provided with a light-transmitting hole 51, and an edge finder 80 is provided on the outer side of the reverse side of the last reflector 50. The edge finder 80 is connected to the edge trigger controller 70, and the edge finder 80 has a photoelectric sensor 81, which is directly opposite the light-transmitting hole 51.

[0030] It includes the following steps:

[0031] (1) Install lenses 22 with different magnifications one by one onto the mounting base 21, and set the boundary intensity on the edge trigger controller 70. Lenses 22 with different magnifications correspond to different light intensities. Create a table and store it in the edge trigger controller 70 (as shown in Table 1 below). The boundary intensity of each lens 22 is divided into at least three values: full dark value, full bright value and intermediate value. The intermediate value is half of the sum of the full dark value and the full bright value.

[0032] Table 1

[0033]

[0034] In Table 1 above, there are n multipliers. Correspondingly, there are n values ​​for decoding, boundary intensity, full brightness value, and full darkness value, with no limit on the number. A0 = (B0 + D0) / 2 ... An = (Bn + Dn) / 2.

[0035] (2) During measurement, a lens 22 with a suitable magnification is selected. After the lens 22 is installed on the mounting base 21, the trigger element 24 on the lens 22 triggers the corresponding sensing element 23. The edge trigger controller 70 automatically determines the magnification of the lens 22 and automatically retrieves the corresponding parameters from the table, and automatically sets the corresponding boundary intensity for measurement. Specifically, the workpiece 60 is placed on the worktable 10 for measurement. The light signal of the workpiece 60 is reflected sequentially through the objective lens 20, the foremost reflector 40, and the end reflector 50 onto the projection screen 30 for imaging. During the reflection of the light signal, when the light signal is reflected onto the end reflector 50, part of the light signal enters the photoelectric sensor 81 of the edge finder 80 through the light-transmitting hole 51, so as to realize the accurate sensing of the light signal by the photoelectric sensor 81. The light signal sensed by the photoelectric sensor 81 is sent to the edge trigger controller 70, which processes the received light signal and finally calculates the measurement result.

[0036] The key design feature of this invention is that multiple sensing elements are installed on the mounting base, all of which are connected to an edge trigger controller. These sensing elements, along with trigger elements installed on the lens, automatically trigger the corresponding sensing elements after the lens is installed on the mounting base. This allows the edge trigger controller to automatically determine the lens magnification, pre-set and store multiple different magnifications, and set corresponding boundary strengths for each. During operation, the pre-set boundary strength is automatically retrieved based on the lens magnification, eliminating the need for manual setting and preventing the loss of magnification settings. When used in conjunction with an edge finder, the edge finder can automatically use different thresholds for edge detection based on different magnifications, achieving a balance between accuracy and convenience.

[0037] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A method of storing different magnifications and automatically setting the border strength, characterized by: The projection system comprises a workbench, an objective lens, a projection screen, a frontmost mirror and a last mirror; the objective lens faces the workbench; the frontmost mirror and the last mirror are both located inside the projection screen, the frontmost mirror reflects the light signal of the objective lens to the last mirror, and the last mirror reflects the light signal of the frontmost mirror to the inner side of the projection screen; the last mirror is provided with a light transmission hole, and the outer side of the back of the last mirror is provided with an edge finder connected with an edge trigger controller; the edge finder is provided with a photoelectric sensor opposite to the light transmission hole; the objective lens comprises a mounting seat and a lens, the mounting seat is provided with a plurality of sensing elements connected with the edge trigger controller, and the lens is detachably mounted on the mounting seat and provided with a trigger element for triggering the corresponding sensing element; the trigger elements on the lenses with different magnifications are different in number and / or position; The method comprises the following steps: (1) install the lenses with different magnifications on the mounting seat one by one, set the boundary intensity on the edge trigger controller, the lenses with different magnifications correspond to different light intensities, thereby establishing a table and storing it in the edge trigger controller; the boundary intensity of each lens is divided into at least three, namely full dark value, full bright value and intermediate value, and the intermediate value is half of the sum of the full dark value and the full bright value; (2) during measurement, select a lens with appropriate magnification, install the lens on the mounting seat, trigger the corresponding sensing element by the trigger element on the lens, the edge trigger controller automatically identifies the magnification of the lens and automatically retrieves the corresponding parameters in the table, and automatically sets the corresponding boundary intensity for measurement.

2. The method of claim 1, wherein the method is characterized by: The sensing element is a contact point, a Hall element, a photoelectric element, a proximity switch or a touch switch.

3. The method of claim 2, wherein the method is characterized by: The proximity switch is a capacitive proximity switch or an electromagnetic proximity switch.

4. The method of claim 1, wherein the method is characterized by: The plurality of sensing elements are arranged at intervals around the central axis of the mounting seat. The plurality of sensing elements are arranged at intervals around the central axis of the mounting seat.

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