A size measurement system and a size measurement method for a filter

Abstract

The application relates to the technical field of size measurement equipment, and provides a size measurement system and a size measurement method for a filter, the size measurement system comprising a control unit, a rack, a driving device arranged on the rack, a filter clamping device and a size measurement assembly, the size measurement assembly comprising a height measurement module and a shape size measurement module, the filter clamping device being connected to the driving device, the driving device being used for driving a filter to be measured clamped by the filter clamping device to move to a measurement area of the height measurement module or a measurement area of the shape size measurement module, and the control unit being signal-connected with the driving device, the filter clamping device, the height measurement module and the shape size measurement module respectively, the size measurement system can automatically control the driving device and the filter clamping device through a control signal sent by the control unit, and can automatically complete the whole test process, so that manual action is reduced, and production efficiency and measurement precision are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of size measurement equipment, and more particularly to a size measurement system for a filter and a size measurement method. BACKGROUND

[0002] The filter is a core component of the base station radio frequency. With the rapid development of 5G technology, the ceramic dielectric filter gradually replaces the traditional metal cavity filter and becomes the mainstream. The ceramic dielectric filter has a relatively small volume and higher requirements for the manufacturing process. The size as a key index plays a crucial role in the performance of the product.

[0003] However, the industry still mainly uses two-dimensional, three-coordinate, height gauge and other equipment for measurement.

[0004] The measurement equipment for the filter in the prior art has the following defects:

[0005] 1. The measurement items required by the full-size process of the dielectric filter are more, resulting in large measurement workload and low efficiency. For example, it usually takes more than 40 minutes to measure a single product conventional process file.

[0006] 2. High measurement error. Since the two-dimensional equipment needs to be manually selected by the measurement personnel, the selected positions of different testers will be different, resulting in human error in the measurement results. SUMMARY

[0007] The main purpose of the present application is to provide a size measurement system for a filter, which aims to solve the technical problems of low measurement efficiency and poor precision of the measurement equipment for the filter in the prior art.

[0008] To achieve the above purpose, the technical scheme adopted by the present application is: a size measurement system for a filter, comprising a control unit, a rack, a driving device arranged on the rack, a filter clamping device and a size measurement assembly, the size measurement assembly comprising a height measurement module and a shape size measurement module, the filter clamping device being connected to the driving device, the driving device being used to drive the filter clamping device to move the filter to be measured to the measurement area of the height measurement module or the measurement area of the shape size measurement module, and the control unit being signal connected with the driving device, the filter clamping device, the height measurement module and the shape size measurement module respectively.

[0009] Further, the height measurement module comprises a laser sensor arranged on the rack.

[0010] Further, the shape size measurement module comprises a camera arranged on the rack.

[0011] Further, the shape and size measuring module comprises a light source arranged on the rack, and the camera faces the light source.

[0012] Further, the light source is a ring light, and the camera faces the inner ring of the ring light.

[0013] Further, the shape and size measuring module comprises a telecentric lens arranged on the rack, and the camera is connected to the small end of the telecentric lens, and the large end of the telecentric lens faces the light source.

[0014] Further, the driving device is a mechanical arm, and the mechanical arm can drive the filter clamping device to move in at least three directions perpendicular to each other.

[0015] Further, the filter clamping device comprises a pneumatic cylinder and a clamping piece connected to the driving end of the pneumatic cylinder.

[0016] In addition, the present application also provides a size measuring method of a filter, which is performed by using the above-mentioned size measuring system of a filter, and comprises the following steps:

[0017] a. Starting the control unit;

[0018] b. Determining whether the filter to be tested is a new product, if yes, calibrating the height of the filter to be tested by the control unit, and then proceeding to step c, if no, determining whether the process file is updated, if the process file is not updated, jumping to step d, if the process file is updated, proceeding to step c, c. Creating a measurement configuration file;

[0019] d. Selecting a measurement configuration file;

[0020] e. Starting the test: the driving device drives the filter clamping device to the filter to be tested, the filter clamping device clamps the filter to be tested, and then the driving device drives the filter clamping device to move to the measurement area of the shape and size measuring module to measure the shape and size of the filter to be tested and / or drives the filter clamping device to move to the measurement area of the height measuring module to measure the height of the filter to be tested;

[0021] f. Generating a measurement report: the software program in the control unit obtains corresponding measurement data according to the measurement results of the shape and size measuring module and / or the height measuring module, and then generates a corresponding measurement report according to the measurement data and the measurement configuration file.

[0022] Further, the size measuring method comprises:

[0023] When the filter to be tested is a new product or needs to add a measurement object, the step of drawing a measurement object by a software program in the control unit is further included before step c.

[0024] The size measurement system for filters provided by the present application has the following advantages:

[0025] Compared with the prior art, in the size measurement system for filters of the present application, the control unit is respectively connected in signal with the driving device, the filter clamping device, the height measurement module and the shape and size measurement module, so that the driving device and the filter clamping device can be automatically controlled by the control signal sent by the control unit, the entire size measurement system can be started by one key, the system will complete the entire test process, thereby reducing manual actions, improving production efficiency, increasing measurement accuracy, and the control unit can also obtain the related measurement results detected by the height measurement module and the shape and size measurement module and perform related analysis and processing. In particular, the measurement requirements of different processes of the medium filter can be completed by the software system product configuration module in the control unit, the subsequent equipment will automatically clamp the medium filter to the measurement position to automatically obtain information, and the software calculates the required aperture, hole depth, pitch and other data according to the measurement information obtained by the size measurement assembly. It is not affected by factors such as manual technology and fatigue. Thus, the consistency and stability of the product are improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0027] Figure 1 A perspective view of the size measurement system for filters provided by an embodiment of the present application;

[0028] Figure 2 A perspective view of the size measurement system for filters provided by an embodiment of the present application; Figure 1 An enlarged view of A in FIG. 1;

[0029] Figure 3 An enlarged view of B in FIG. 1; Figure 1 An enlarged view of B in FIG. 1;

[0030] Figure 4 A component signal connection relationship diagram of the size measurement system for filters provided by an embodiment of the present application;

[0031] Figure 5 A simplified flowchart of the size measurement method for filters provided by an embodiment of the present application.

[0032] The reference numerals involved in the above drawings are listed as follows:

[0033] 1 - control unit; 2 - rack; 3 - driving device; 4 - filter clamping device; 5 - fixing tool; 41 - air cylinder; 42 - clamping piece; 100 - height measuring module; 101 - laser sensor; 200 - shape and size measuring module; 201 - camera; 202 - light source; 203 - telecentric lens; 300 - tray; 301 - groove. DETAILED DESCRIPTION

[0034] In order to make the technical problems to be solved by the present application, the technical solutions and beneficial effects clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0035] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0036] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0037] In addition, the terms "first", "second" are only used for description purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0038] In order to illustrate the technical solutions described in the present application, the following will be described in detail in combination with specific drawings and embodiments.

[0039] Reference is made to Figures 1 to 4The embodiment of the present application provides a size measurement system for a filter, which comprises a control unit 1, a rack 2, a driving device 3 arranged on the rack 2, a filter clamping device 4 and a size measurement assembly, the size measurement assembly comprises a height measurement module 100 and a shape size measurement module 200, the filter clamping device 4 is connected to the driving device 3, the driving device 3 is used for driving the filter clamped by the filter clamping device 4 to move to a measurement area of the height measurement module 100 or a measurement area of the shape size measurement module 200, the control unit 1 is signal-connected with the driving device 3, the filter clamping device 4, the height measurement module 100 and the shape size measurement module 200 respectively, so that the driving device 3 and the filter clamping device 4 can be automatically controlled by a control signal sent by the control unit 1, the control unit 1 can also acquire relevant measurement results detected by the height measurement module 100 and the shape size measurement module 200 by establishing a control signal with them, the control unit 1 should be understood as having a program capable of processing these signals and sending control instructions, for example, a computer installed with relevant software and the like, the size measurement system is especially suitable for measuring the size and shape of the filter (for example, a medium filter), but is not limited thereto, if the size measurement system provided by the present application is used for the size measurement of any other appropriate measured object, it should also fall within the protection scope of the present application.

[0040] Referring to Figure 3 According to one embodiment of the present application, the height measurement module 100 comprises a laser sensor 101 arranged on the rack 2, which can emit point laser ranging to a product to be measured (for example, a filter), and the height measurement principle of the laser sensor 101 is specifically as follows: the filter clamping device 4 clamps the product to be measured above the laser sensor 101, since the laser is point laser, taking the hole depth of the product to be measured as an example, first, the hole wall edge of the product to be measured is moved to the upper side of the laser (a plurality of hole wall edge positions can be selected according to needs, for example, four positions), four height values are obtained, and the average value of the four height values is calculated. Then, the center of the hole of the product to be measured is moved to the upper side of the laser sensor 101 to obtain a height value. Then, the final hole depth is the current height value minus the average value of the four height values of the hole wall edge. Of course, as other embodiments, the laser sensor 101 can also be replaced by other types of distance sensors, for example, an infrared ranging sensor, an ultrasonic ranging sensor and the like.

[0041] Referring to Figure 3According to one embodiment of the present application, the shape and size measuring module 200 comprises a camera 201 arranged on the frame 2, preferably but not limited to a CCD camera, which is an abbreviation of charge coupled device, which can convert light into electric charge and store and transfer the electric charge, and can also take out the stored electric charge to change the voltage, and is an ideal camera 201 element, and the CCD camera formed by the same has the characteristics of small size, light weight, no influence of magnetic field, and resistance to vibration and impact.

[0042] Referring to Figure 3 According to one embodiment of the present application, the shape and size measuring module 200 comprises a light source 202 arranged on the frame 2, and the camera 201 faces the light source 202, and the light source 202 is used to irradiate the product to be measured (for example, a filter), so that the camera 201 can take a better picture.

[0043] Referring to Figure 3 According to one embodiment of the present application, the light source 202 is a ring-shaped lamp, the camera 201 faces the inner ring of the ring-shaped lamp, and when measuring, the filter clamping device 4 places the product to be measured in the inner ring of the ring-shaped lamp, and the ring-shaped lamp irradiates the product to be measured from 360°, so that the image collected by the camera 201 is very clear and uniform, and of course, the light source 202 is not limited to a ring-shaped lamp.

[0044] Referring to Figure 3 According to one embodiment of the present application, the shape and size measuring module 200 comprises a telecentric lens 203 arranged on the frame 2, and the camera 201 is connected to the small end of the telecentric lens 203, and specifically, the connection between the camera 201 and the small end of the telecentric lens 203 can be fixed by a fixing tool 5, and the fixing tool 5 is also connected to the frame 2, and specifically, the fixing tool 5 can comprise two clamping blocks clamping the connection between the camera 201 and the small end of the telecentric lens 203, wherein the first clamping block is connected to the frame 2, and the second clamping block can be detachably mounted on the first clamping block by a fastener such as a bolt, the large end of the telecentric lens 203 faces the light source 202, and if the object measured by a general lens is not in the same plane, the magnification needs to be adjusted, but the magnification of the telecentric lens 203 does not change with the object distance, and the telecentric lens 203 has the characteristic of high depth of field, which reflects the distance range of the object that can be clearly imaged after focusing of the lens. Once the object exceeds the depth of field of the lens, the image will become blurred, and high depth of field can still have excellent clarity when observing the product to be measured with thickness.

[0045] Referring to Figure 1According to one embodiment of the present application, the driving device 3 is a mechanical arm capable of driving the filter clamping device 4 to move in at least three directions perpendicular to each other (for example, X, Y and Z directions along the XYZ coordinate axes), specifically, the mechanical arm can be a four-axis mechanical arm, and even more preferably, the mechanical arm can drive the filter clamping device 4 to move in any direction, at which time a more flexible and complex mechanical hand or robot can be used for operation.

[0046] Referring to Figure 2 According to one embodiment of the present application, the filter clamping device 4 comprises a cylinder 41 and a clamping piece 42 connected to the driving end of the cylinder 41, which can be a clamping plate or a clamping block, facilitating clamping of the product to be measured (for example, a filter), and the filter clamping device 4 further comprises a solenoid valve matched with the cylinder 41, and the solenoid valve is in signal connection with the control unit 1, specifically, the clamping piece 42 can cooperate with another fixed plate (or fixed block) on the filter clamping device 4 to clamp the product to be measured, or two cylinders 41 connected with the clamping piece 42 can be used to achieve clamping, or a double-extended-rod cylinder 41 with reverse extension capability can be used.

[0047] Referring to Figure 1 In addition, the rack 2 can be provided with a tray 300 for placing the product to be measured, an electrical mounting plate, a power switch, etc., and the filter clamping device 4 clamps the product to be measured on the tray 300 to the measurement area of the height measurement module 100 or the measurement area of the shape and size measurement module 200, as one embodiment, the tray 300 can be provided with a plurality of grooves 301, preferably equidistantly distributed grooves 301. Each groove 301 can be designed according to the length, width and height of the product to be measured (for example, a filter), and the groove 301 has a length-width ratio of about 1mm larger than the product (but not limited to this size), for fixing the placement position of the product to be measured. The groove 301 has a depth of 5mm-10mm (but not limited to this size range) shallower than the thickness of the product to be measured, facilitating clamping of the filter clamping device 4 to the product to be measured, of course, the tray 300 is not limited to this structure with grooves 301.

[0048] Referring to Figure 5 In addition, the present application also provides a size measurement method of a filter, which is performed by using the above-mentioned size measurement system for a filter, comprising the steps of:

[0049] a. starting the control unit 1, specifically, the control unit 1 can be powered on, of course, the shape measurement module, the motion module and the height measurement module 100 can also be powered on and initialized at this time or at a subsequent appropriate link;

[0050] b. Determine whether the filter to be tested is a new product, if yes, calibrate the height of the filter to be tested through the control unit 1, and then proceed to step c, if no, determine whether the process file is updated, if the process file is not updated, jump to step d, select the existing measurement configuration file; if the process file is updated, proceed to step c,

[0051] c. Create a measurement configuration file (the measurement configuration file is the configuration file shown in FIG. 2), which can be specifically creating a measurement configuration file according to the process file, for example, selecting the aperture, hole depth, pitch and other shape and size parameters of the product to be tested (for example, the filter); Figure 5

[0052] d. Select a measurement configuration file, that is, select the configuration file created in step c or select an existing measurement configuration file;

[0053] e. Start testing: drive the filter clamping device 4 to the filter to be tested by the driving device 3, and then drive the filter clamping device 4 to the measurement area of the shape and size measurement module 200 to measure the shape and size of the filter to be tested and / or drive the filter clamping device 4 to the measurement area of the height measurement module 100 to measure the height of the filter to be tested. The above-mentioned power-on and initialization operations of the shape measurement module, the movement module and the height measurement module 100 can also be started before this step, specifically by sending a control signal through the control unit 1 to control the actions of the driving device 3 and the filter clamping device 4, and by obtaining the measurement result signal of the height measurement module 100 and the shape and size measurement module 200 through the control unit 1, so as to facilitate the automatic operation of the entire size measurement method through the one-key start of the control unit 1;

[0054] f. Generate a measurement report: the software program in the control unit 1 obtains the corresponding measurement data according to the measurement results of the shape and size measurement module 200 and / or the height measurement module 100, and then generates the corresponding measurement report according to the measurement data and the measurement configuration file. Of course, after this step, it can be considered that the size measurement method of the filter has been completed (finished), but if other operations are still needed after this step, it is also possible.

[0055] ​According to one embodiment of the present application, the size measuring method comprises: when the filter to be tested is a new product or needs to add a new measurement object, before step c, the following step is further included: drawing the measurement object (setting the measurement object) through the software program in the control unit 1, specifically, opening the test software

measurement tool

[0056] According to one embodiment of the present application, in step b, the height of the filter to be tested is calibrated by the control unit 1, which can specifically adopt the nine-point calibration method, the main purpose of which is to obtain the relationship between the camera 201 pixel coordinate system and the coordinate system of the motion range of the driving device 3, so that the driving device 3 can drive the filter clamping device 4 to accurately reach the measurement position. The software program in the control unit 1 will automatically read the pixel coordinates and motion module coordinates, and then calculate the affine transformation matrix. Specifically, the software program in the control unit 1 will automatically calculate nine equally spaced points according to the initial position of the driving device 3, and then control the driving device 3 to reach each point in turn, while recording the actual driving device 3 coordinates of the point and the coordinates of the calibration tool in the image. Thus, nine sets of corresponding coordinates are obtained, and then the affine matrix can be calculated according to the nine sets of coordinates and saved. Subsequently, the corresponding coordinates of the driving device 3 can be obtained by multiplying the image coordinates by the affine matrix.

[0057] The above only describes optional embodiments of the present application and does not limit the present application. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A size measurement system for a filter, characterized by, The size measurement system comprises a control unit, a rack, a driving device arranged on the rack, a filter clamping device and a size measurement assembly, the size measurement assembly comprises a height measurement module and a shape size measurement module, the filter clamping device is connected to the driving device, the driving device is used to drive the filter clamping device to move the filter to be measured to the measurement area of the height measurement module or the measurement area of the shape size measurement module, and the control unit is signal connected with the driving device, the filter clamping device, the height measurement module and the shape size measurement module respectively. The filter clamping device comprises a cylinder and a clamping piece connected to the driving end of the cylinder. The height measurement module comprises a laser sensor arranged on the rack. The measurement area of the height measurement module is directly above the laser sensor. The method for measuring the size of the filter by using the size measurement system comprises the following steps: a. Starting the control unit; b. Determining whether the filter to be tested is a new product, if yes, calibrating the height of the filter to be tested by the control unit, and then entering step c, if no, determining whether the process file is updated, if the process file is not updated, jumping to step d, if the process file is updated, entering step c, c. Creating a measurement configuration file; d. Selecting a measurement configuration file; e. Starting the test: the driving device drives the filter clamping device to the filter to be tested, the filter clamping device clamps the filter to be tested, and then the driving device drives the filter clamping device to move to the measurement area of the shape size measurement module to measure the shape size of the filter to be tested and / or drives the filter clamping device to move to the measurement area of the height measurement module to measure the height of the filter to be tested; f. Generating a measurement report: the software program in the control unit obtains corresponding measurement data according to the measurement results of the shape size measurement module and / or the height measurement module, and then generates a corresponding measurement report according to the measurement data and the measurement configuration file.

2. The size measurement system for a filter according to claim 1, wherein, The shape size measurement module comprises a camera arranged on the rack.

3. The size measurement system for a filter according to claim 2, wherein, The shape size measurement module comprises a light source arranged on the rack, and the camera faces the light source.

4. The size measurement system for a filter according to claim 3, wherein, The light source is a ring-shaped lamp, and the camera faces the inner ring of the ring-shaped lamp.

5. The dimensional measurement system for a filter of claim 3, wherein, The shape size measurement module comprises a telecentric lens arranged on the rack, and the camera is connected to the small end of the telecentric lens, and the large end of the telecentric lens faces the light source.

6. The sizing system for a filter according to any one of claims 1 to 5, wherein, The driving device is a mechanical arm, and the mechanical arm can drive the filter clamping device to move in at least three directions perpendicular to each other.

7. The size measurement system for a filter according to claim 1, wherein, The method for measuring the size comprises: When the filter to be tested is a new product or needs to add a measurement object, the method further comprises the following step before step c: drawing a measurement object by the software program in the control unit.

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