Instrument shooting device for dial printing

Abstract

The invention provides an instrument shooting device for dial printing, and belongs to the technical field of dial printing. The instrument shooting device for dial printing comprises an X-direction moving mechanism, a Y-direction moving mechanism and a Z-direction moving mechanism, and one of the X-direction moving mechanism, the Y-direction moving mechanism and the Z-direction moving mechanism is connected with the other two moving mechanisms in a matched mode to form a middle moving mechanism. One of the other two moving mechanisms except the middle moving mechanism is provided with a fixing structure used for being fixed to the machine frame, and the other one of the other two moving mechanisms is provided with a camera used for shooting an instrument dial. Left-right movement, front-back movement and up-down movement are output through the three moving mechanisms respectively, the left-right position, the front-back position and the up-down position of the camera are adjusted, it is guaranteed that the relative position between the camera and an instrument is appropriate, the instrument does not need to be adjusted, the position of the camera is adjusted through the three moving mechanisms, and adjustment is more convenient.

Description

Technical Field

[0001] The present invention relates to an instrument photographing device for dial printing, belonging to the technical field of dial printing. Background Art

[0002] An SF6 density relay is an instrument used to monitor the density of SF6 gas in the gas chamber of SF6 high-voltage electrical equipment. For example, a gas monitoring device disclosed in a Chinese utility model patent with the authorization publication number CN202076182U includes a case, a dial is provided on the case, a bourdon tube is provided inside the case, one end of the bourdon tube is connected to a high-voltage electrical appliance through an inlet pipe, the other end is connected to one end of a bimetallic strip, and the other end of the bimetallic strip is connected to a movement. When in use, SF6 gas enters the bourdon tube, the bourdon tube deforms under the action of gas pressure, the end part displaces, drives the pointer to move through the movement, and the density value of SF6 gas can be obtained through the reading on the dial. Among them, the bimetallic strip plays a temperature compensation role to compensate for the deformation of the bourdon tube caused by environmental temperature changes.

[0003] With the increasing requirements for electrical equipment in the power system, SF6 density relays with a 1.0 accuracy class are the needs of more users. However, the existing debugging methods for the accuracy class are still manual operations, including manually reading the pointer angle, manually drawing the dial pattern, and then UV printing the dial onto a blank dial, realizing the production process of 1.0-class density relays. However, the automation level of this process is low. From the way of manually reading the pointer angle under the integral pressure, manually drawing the dial, and then printing, although the accuracy is improved and debugging is avoided, the process and human factors are increased in production, which is not conducive to mass production.

[0004] In this regard, a Chinese patent application with the publication number CN106153238A discloses a manufacturing method and product of a non-calibrated pointer-type pressure gauge, in which an industrial camera collects the position images of the pointer at each numerical point on the dial and transmits them to an image processing device. The image processing device draws a dial consistent with the pointer position, and finally prints the dial through an output printing device. In addition, a Chinese patent application with the publication number CN116872630A discloses a method, system, medium and terminal for automatic collection and printing of a meter dial. An image collection device collects real-time images of each pressure collection point, extracts the corresponding pointer angle indication information from the real-time images, performs the drawing of the meter dial accordingly, and finally a printing device performs the printing of the meter dial, realizing the automation of meter dial drawing and printing.

[0005] Both of the above two patent documents collect the pointer images of the instrument through a camera. However, different instruments have different sizes. After the instrument is placed at a certain position, it is very difficult to ensure that the relative position between it and the camera is just right. At this time, it is necessary to repeatedly move the instrument, and even add pads under the instrument, etc. Since the instrument is connected to the pressure source, due to the existence of the connecting pipeline, the adjustment of the instrument position is very inconvenient, and even there are phenomena of displacement and reset after adjustment, which brings great inconvenience to the test operation. Summary of the Invention

[0006] The purpose of the present invention is to provide an instrument photographing device for dial printing, so as to solve the problem that when the relative position between the instrument and the camera in the prior art is inappropriate, it is necessary to move the instrument, and the instrument is connected to the pressure source, resulting in inconvenient adjustment.

[0007] To achieve the above purpose, the instrument photographing device for dial printing in the present invention adopts the following technical solutions: An instrument photographing device for dial printing includes an X-direction moving mechanism capable of outputting left-right movement, a Y-direction moving mechanism capable of outputting front-back movement, and a Z-direction moving mechanism capable of outputting up-down movement. One of the three moving mechanisms in the X-direction, Y-direction, and Z-direction is respectively connected to the other two moving mechanisms to form an intermediate moving mechanism. One of the other two moving mechanisms except the intermediate moving mechanism is provided with a fixing structure for fixing on the frame, and the other is installed with a camera for photographing the instrument dial.

[0008] The beneficial effect of the above technical solution is that the present invention proposes a pioneering instrument photographing device for dial printing. The device includes an X-direction moving mechanism, a Y-direction moving mechanism, and a Z-direction moving mechanism. The intermediate moving mechanism among the three moving mechanisms is connected to the other two moving mechanisms, and one of the other two moving mechanisms is provided with a fixing structure for fixing on the frame, so that the whole device can be fixed on the frame. The other is installed with a camera for photographing the instrument dial, which can capture image information and facilitate subsequent drawing of the dial. Since the three moving mechanisms can respectively output left-right movement, front-back movement, and up-down movement, the left-right position, front-back position, and up-down position of the camera can be adjusted to ensure that the relative position between the camera and the instrument is appropriate. The present invention does not need to adjust the instrument, but adjusts the position of the camera through the three moving mechanisms, which is more convenient to adjust.

[0009] Further, the camera is installed on the Z-direction moving mechanism.

[0010] Further, the Z-direction moving mechanism includes a mounting base connected to the intermediate moving mechanism, an upper fixing base and a lower fixing base fixed on the mounting base, and a movable base disposed between the upper fixing base and the lower fixing base. A vertically arranged screw rod is rotatably mounted on the upper fixing base and the lower fixing base. The movable base is threadedly connected to the screw rod and is vertically guided and fitted with the mounting base. The camera is mounted on the movable base.

[0011] Further, a positioning base is also fixed on the mounting base between the upper fixing base and the lower fixing base. A through hole for the screw rod to pass through is provided on the positioning base, and a tightening rod for pressing against the outer surface of the screw rod is also mounted on the positioning base.

[0012] Further, a handle is fixed to the end of the tightening rod.

[0013] Further, a screwing structure for manual screwing is provided at the upper end or the lower end of the screw rod.

[0014] Further, the movable base includes a base body threadedly connected to the screw rod and a mounting plate fixedly connected to the base body. The mounting plate is in a "T" shape and includes a vertical plate section and horizontal plate sections perpendicular to the vertical plate section and extending to both sides thereof. One of the cameras is mounted on each of the two horizontal plate sections.

[0015] Further, a lamp base is provided below the lower fixing base on the mounting base, and a light source for cooperating with the camera for shooting is mounted on the lamp base.

[0016] Further, a micro control box is provided on the top of the camera. A sensor module, an image processing module and a calculation module are provided in the micro control box. The sensor module is used to detect the pointer movement track of the instrument and the deformation amount of the elastic metal curved tube, and transmit the detection information to the image processing module. The image processing module is used to divide the instrument area of the image into several scale grids according to the detection information. The calculation module is used to calculate the angle value of the pointer according to the detection information.

[0017] Further, the intermediate moving mechanism is a Y-direction moving mechanism. The X-direction moving mechanism includes an X-direction operation table and an X-direction sliding table that slides left and right along the X-direction operation table. The fixing structure is provided on the X-direction operation table; the Y-direction moving mechanism includes a Y-direction operation table fixedly connected to the X-direction sliding table and a Y-direction sliding table that slides back and forth along the Y-direction operation table. The Y-direction sliding table is connected to the Z-direction moving mechanism. Description of the Drawings

[0018] Figure 1 is a perspective view of the instrument photographing device for dial printing in the present invention; Figure 2 is a front view of the instrument photographing device for dial printing in the present invention; Figure 3 is a side view of the instrument photographing device for dial printing in the present invention; Figure 4 Side view of the instrument photographing device for dial printing in the present invention (the camera and lamp holder are not shown); Figure 5 Structural diagram of the instrument applicable to the instrument photographing device for dial printing in the present invention.

[0019] In the figure: 1. X-direction operation table; 2. Fixed plate; 3. X-direction sliding table; 4. Mounting seat; 5. Upper fixed seat; 6. Cylinder; 7. Y-direction operation table; 8. Y-direction sliding table; 9. Handle; 10. Positioning seat; 11. Tightening rod; 12. Seat body; 13. Lower fixed seat; 14. Lamp holder; 15. Camera; 16. Screw; 17. Light source; 18. Micro control box; 19. Mounting plate; 20. Knob; 21. Y-direction slide rail; 22. Gear assembly; 23. Pointer. Specific embodiments

[0020] The features and performance of the present invention will be further described in detail below in conjunction with embodiments.

[0021] The present invention controls the movement of the camera through the X-direction movement mechanism, Y-direction movement mechanism and Z-direction movement mechanism, adjusts the relative position between the camera and the instrument, and does not need to adjust the instrument, which is more convenient.

[0022] Embodiment of the instrument photographing device for dial printing in the present invention: As Figure 1 , Figure 2 , Figure 3 and Figure 4 shown, the instrument photographing device for dial printing includes an X-direction movement mechanism capable of outputting left and right movement, a Y-direction movement mechanism capable of outputting front and back movement, and a Z-direction movement mechanism capable of outputting up and down movement. One of the three movement mechanisms in the X-direction, Y-direction, and Z-direction is respectively connected and cooperated with the other two movement mechanisms to form an intermediate movement mechanism. A fixing structure for fixing on the frame is provided on one of the other two movement mechanisms except the intermediate movement mechanism, and a camera 15 for photographing the instrument dial is installed on the other one, where the instrument is an SF6 density relay.

[0023] As an embodiment, the intermediate moving mechanism is a Y-direction moving mechanism, and the X-direction moving mechanism includes an X-direction operating table 1 and an X-direction slide 3 disposed below the X-direction operating table 1 and sliding left and right along the X-direction operating table 1. The specific sliding control method is that a motor, a lead screw and a guide rod are disposed in the X-direction operating table 1, and the X-direction slide 3 is controlled to move left and right by a lead screw nut mechanism. Of course, in other embodiments, the X-direction slide 3 can also be directly driven to move left and right by a cylinder, a hydraulic cylinder or an electric push rod. The above-mentioned fixed structure is a fixed plate 2 disposed on the X-direction operating table 1, and the fixed plate 2 is located on the top of the X-direction operating table 1, which is equivalent to the installation base of the entire device.

[0024] The Y-direction moving mechanism includes a Y-direction operating table 7 fixedly connected below the X-direction slide table 3 and a Y-direction slide table 8 sliding forward and backward along the Y-direction operating table 7, and the Y-direction slide table 8 is connected to the Z-direction moving mechanism. The Y-direction operating table 7 is connected to the Y-direction slide rail 21, and the Y-direction slide table 8 slides with the Y-direction slide rail 21, and the Y-direction slide table 8 penetrates the Y-direction operating table 7. The rear end of the Y-direction slide rail 21 is provided with a cylinder 6, and the telescopic rod of the cylinder 6 is transmission-connected with the Y-direction slide table 8, which is used to control the Y-direction slide table 8 to slide forward and backward.

[0025] The camera 15 is mounted on the Z-direction moving mechanism. Specifically, the Z-direction moving mechanism includes a mounting seat 4 connected to the Y-direction slide 8, an upper fixed seat 5 and a lower fixed seat 13 fixed on the mounting seat 4, and a movable seat arranged between the upper fixed seat 5 and the lower fixed seat 13. A vertically arranged screw rod 16 is rotatably mounted on the upper fixed seat 5 and the lower fixed seat 13. The movable seat is threadedly connected with the screw rod 16 and cooperates with the upper and lower guides of the mounting seat 4. The camera 15 is mounted on the movable seat. In this way, when the screw rod 16 rotates, the movable seat moves up and down under the action of the screw nut mechanism principle, thereby driving the camera 15 to move up and down to adjust the distance between the camera 15 and the instrument.

[0026] Furthermore, in order to facilitate the rotation of the screw rod 16, a screwing structure for manual screwing is provided at the upper end of the screw rod 16, and the screwing structure in this embodiment is a knob 20. In order to lock the position of the screw rod 16 and prevent it from loosening and causing the position of the camera 15 to deviate, a positioning seat 10 is also fixed on the mounting seat 4 between the upper fixing seat 5 and the lower fixing seat 13. The positioning seat 10 is arranged close to the upper fixing seat 5, and a through hole is provided on the positioning seat 10 for the screw rod 16 to pass through. A tightening rod 11 for tightening the outer surface of the screw rod 16 is also installed on the positioning seat 10. The tightening rod 11 is a stud. In order to facilitate the rotation of the tightening rod 11, a handle 9 is fixed at the end of the tightening rod 11.

[0027] Furthermore, the movable seat comprises a seat body 12 threadedly connected to the screw rod 16 and a mounting plate 19 fixedly connected to the seat body 12, and the seat body 12 is matched with the mounting seat 4 in an up-and-down guiding manner. Figure 2As shown, the mounting plate 19 is in a "T" shape, including a vertical plate section and horizontal plate sections perpendicular to the vertical plate section and extending to both sides thereof, and a camera 15 is installed on each of the two horizontal plate sections, so that two instruments can be photographed at one time, thereby improving work efficiency.

[0028] The structure of the SF6 density relay detected by the present invention is as follows Figure 5 As shown, the SF6 density relay is provided with a gear assembly 22, a pointer 23, an elastic metal curved tube and a double-layer metal belt (not shown in the figure). The elastic metal curved tube is hollow inside. The elastic metal curved tube is connected to the circuit breaker in actual application, and its internal space is communicated with the SF6 gas in the circuit breaker. In order to facilitate the detection of the instrument corresponding to the SF6 gas of different densities, the present invention connects the elastic metal curved tube to the gas source. In addition, the end of the elastic metal curved tube is connected to the double-layer metal belt, and the double-layer metal belt is connected to the gear assembly 22 and the pointer 23.

[0029] The double-layer metal strip can absorb the ambient temperature for temperature compensation. Usually, the double-layer copper strip is used as a temperature compensation element. In fact, alloy materials can be used to replace the double-layer copper strip according to specific circumstances. When the SF6 density relay is not installed and used, if the ambient temperature is 20°C, the pointer 23 points to 0MP, but if the ambient temperature is not 20°C, because the double-layer metal strip is compensated according to the difference between the ambient temperature and 20°C, when the ambient temperature is higher than 20°C, the double-layer metal strip stretches, driving the gear assembly 22 and the pointer 23 to move in the direction of decreasing the density or pressure indication value, and the reading of the pointer 23 is less than 0MP; otherwise, when the ambient temperature is lower than 20°C, the gear assembly 22 and the pointer 23 will move in the direction of increasing the density or pressure indication value, and the reading of the pointer 23 is greater than 0MP.

[0030] The camera 15 in the present invention is used to collect image information of the SF6 density relay. A lens is provided at the bottom of the camera 15. A lamp holder 14 is provided on the mounting seat 4 below the lower fixing seat 13. A light source 17 for cooperating with the camera 15 for shooting is installed on the lamp holder 14 to ensure sufficient light to improve the quality of the image output by the camera. In addition, the camera 15 is built with a CMOS sensor, which is used for real-time acquisition. CMOS image sensors are widely used in industrial image processing. The use of CMOS sensors is conducive to improving productivity, quality and economic efficiency of production processes. In addition, the camera 15 is built with an analog-to-digital converter, which is used to convert the received analog signal into digital pixel data and generate a grayscale image sequence of the pointer. The resolution of the image information generated by the camera 15 is 2560×1440, and 2560×1440 is 2K resolution. Such a structural design can output clearer image information.

[0031] A micro control box 18 is arranged on the top of the camera 15, and a sensor module, an image processing module and a calculation module are arranged in the micro control box 18. The sensor module is used to detect the motion trajectory of the pointer 23 and the deformation of the elastic metal curved tube (the specific detection method is also through shooting), and transmit the detection information to the image processing module. The image processing module is used to receive the image information returned by the camera 15, the motion trajectory of the pointer 23 and the deformation information of the elastic metal curved tube returned by the sensor module, and divide the instrument area of ​​the SF6 density relay image into a number of scale grids. The calculation module is used to calculate the angle value of the pointer according to the deformation of the elastic metal curved tube and the motion trajectory of the pointer 23, so as to obtain the actual dial that meets the SF6 density relay.

[0032] Before the camera 15 shoots, the left and right position, front and back position, and up and down position of the camera 15 can be adjusted by the X-direction moving mechanism, the Y-direction moving mechanism, and the Z-direction moving mechanism to ensure that the relative position between the camera 15 and the SF6 density relay is appropriate. The present invention does not need to adjust the SF6 density relay, but adjusts the position of the camera by three moving mechanisms, which is more convenient to adjust. In addition, the present invention sets a sensor module, an image processing module, and a calculation module, and applies them to the production and precision debugging of the SF6 density relay, which can improve the accuracy of the product, reduce the debugging difficulty of the operator, and improve the consistency of the product, ultimately improving the overall production efficiency, while also saving labor costs, and has excellent application prospects.

[0033] In other embodiments of the instrument photographing device for dial printing: the fixing structure for fixing on the frame can also be directly set on the X-axis operating table, for example, the fixing holes are directly set on the X-axis operating table, thereby eliminating the fixing plate.

[0034] In other embodiments of the instrument photographing device for dial printing: the intermediate moving mechanism can also be an X-direction moving mechanism. In this case, the fixed structure is arranged on the Y-direction moving mechanism, and the camera is still installed on the Z-direction moving mechanism. The Z-direction moving mechanism is connected to the X-direction moving mechanism, and the Z-direction moving mechanism and the X-direction moving mechanism can slide back and forth as a whole under the action of the Y-direction moving mechanism; in other embodiments, the camera can also be installed on the X-direction moving mechanism. In this case, the Y-direction moving mechanism or the Z-direction moving mechanism is the intermediate moving mechanism. Of course, the camera can also be installed on the Y-direction moving mechanism. In this case, the X-direction moving mechanism or the Z-direction moving mechanism is the intermediate moving mechanism.

[0035] In other embodiments of the instrument photographing device for dial printing: the micro control box may not be provided on the top of the camera, and the specific detection method may be the same as that in patent document CN116872630A or patent document CN106153238A.

[0036] In other embodiments of the instrument photographing device for dial printing: when the indoor lighting is good, a lamp holder may not be provided on the mounting base.

[0037] In other embodiments of the instrument photographing device for dial printing: the movable seat only includes a seat body, and only one camera is installed on the seat body.

[0038] In other embodiments of the instrument photographing device for dial printing: the screwing structure on the screw can also be a hexagonal head, in which case it needs to be used in conjunction with a wrench; in other embodiments, the screwing structure can also be set at the lower end of the screw. Of course, in other embodiments, the screwing structure can be omitted, but the screw can be directly connected to the output end of the motor, and the rotation of the screw can be controlled by controlling the forward and reverse rotation of the motor.

[0039] In other embodiments of the instrument photographing device for dial printing: the end of the tightening rod may not be fixed with a handle, but a tool may be used to directly operate the end of the tightening rod to rotate it, for example, the tightening rod is a tightening bolt.

[0040] In other embodiments of the instrument photographing device for dial printing: the positioning seat may not be provided on the mounting seat, and the tightening rod is no longer provided. The self-locking effect of the thread is used to keep the screw in a certain position.

[0041] In other embodiments of the instrument photographing device for dial printing: the Z-axis moving mechanism can also be a gear rack mechanism, in which case the camera is mounted on the rack. Of course, in other embodiments, the Z-axis moving mechanism can also be a hydraulic cylinder, a pneumatic cylinder or an electric push rod, in which case the camera is mounted on the telescopic rod of the hydraulic cylinder, the pneumatic cylinder or the electric push rod.

[0042] In other embodiments of the instrument photographing device for dial printing: the Y-axis moving mechanism may not be controlled by a cylinder, but by a screw nut mechanism controlled by a motor.

[0043] In other embodiments of the instrument photographing device for dial printing: the photographed instrument may also be a pressure instrument.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. An instrument photographing device for dial printing, characterized in that, It includes an X-direction moving mechanism capable of outputting left-right movement, a Y-direction moving mechanism capable of outputting front-back movement, and a Z-direction moving mechanism capable of outputting up-down movement. One of the three moving mechanisms in the X, Y, and Z directions is respectively connected and cooperated with the other two moving mechanisms to form an intermediate moving mechanism. A fixing structure for fixing on the frame is provided on one of the other two moving mechanisms except the intermediate moving mechanism, and a camera for photographing the instrument dial is installed on the other one.

2. The instrument photographing device for dial printing according to claim 1, characterized in that, The camera is installed on the Z-direction moving mechanism.

3. The instrument photographing device for dial printing according to claim 2, characterized in that, The Z-direction moving mechanism includes a mounting seat connected to the intermediate moving mechanism, an upper fixing seat and a lower fixing seat fixed on the mounting seat, and a movable seat arranged between the upper fixing seat and the lower fixing seat. A vertically arranged screw rod is rotatably installed on the upper fixing seat and the lower fixing seat. The movable seat is threadedly connected to the screw rod and is in up-down guiding cooperation with the mounting seat. The camera is installed on the movable seat.

4. The instrument photographing device for dial printing according to claim 3, characterized in that, A positioning seat is further fixed on the mounting seat between the upper fixing seat and the lower fixing seat. A through hole for the screw rod to pass through is provided on the positioning seat, and a tightening rod for pressing against the outer surface of the screw rod is also installed on the positioning seat.

5. The instrument photographing device for dial printing according to claim 4, characterized in that, A handle is fixed to the end of the tightening rod.

6. The instrument photographing device for dial printing according to any one of claims 3 to 5, characterized in that, A screwing structure for manual screwing is provided at the upper end or the lower end of the screw rod.

7. The instrument photographing device for dial printing according to any one of claims 3 to 5, characterized in that, The movable seat includes a seat body threadedly connected to the screw rod and a mounting plate fixedly connected to the seat body. The mounting plate is in a "T" shape, including a vertical plate section and horizontal plate sections perpendicular to the vertical plate section and extending to both sides thereof. One of the cameras is installed on each of the two horizontal plate sections on both sides.

8. The instrument photographing device for dial printing according to any one of claims 3 to 5, characterized in that, A lamp holder is provided below the lower fixing seat on the mounting seat, and a light source for cooperating with the camera for photographing is installed on the lamp holder.

9. The instrument photographing device for dial printing according to any one of claims 1 to 5, characterized in that, A micro control box is provided on the top of the camera. A sensor module, an image processing module, and a calculation module are provided in the micro control box. The sensor module is used to detect the movement track of the pointer of the instrument and the deformation amount of the elastic metal curved tube, and transmit the detection information to the image processing module. The image processing module is used to divide the instrument area of the image into several scale grids according to the detection information. The calculation module is used to calculate the angle value of the pointer according to the detection information.

10. The instrument photographing device for dial printing according to any one of claims 2 to 5, characterized in that, The intermediate moving mechanism is the Y-direction moving mechanism. The X-direction moving mechanism includes an X-direction operation table and an X-direction sliding table sliding left and right along the X-direction operation table. The fixing structure is provided on the X-direction operation table; the Y-direction moving mechanism includes a Y-direction operation table fixedly connected to the X-direction sliding table and a Y-direction sliding table sliding back and forth along the Y-direction operation table. The Y-direction sliding table is connected to the Z-direction moving mechanism.

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