Device and method for automatically detecting resistance value and ratio difference

Abstract

The invention discloses a device and method for automatically detecting the resistance value and the ratio difference, and the device comprises a three-axis platform, a function element detector and a resistance value detector, the three-axis platform comprises an X axis, a Y axis and a Z axis, the Y axis is provided with a cylinder fixing bottom plate, the outer surface of the cylinder fixing bottom plate is fixedly connected with three groups of cylinders, and the Z axis is provided with a Z axis; the output ends of the first set of air cylinders are fixedly connected with suction cup bases, the outer surfaces of the suction cup bases are fixedly connected with vacuum suction cups, the output ends of the second set of air cylinders and the third set of air cylinders are fixedly connected with probe bases, accurate positioning of the small CT mutual inductor is achieved through three-axis directional movement, and then the second set of air cylinders drive upper contact pins and probes to press downwards. A certain value of current is connected to an upper contact pin through a function element detector, then a signal is fed back to the function element detector through a probe, the function element detector records qualified and unqualified signals to a PLC, after the whole disc action is repeatedly completed, screening is completed through PLC calculation, and a third set of air cylinders drive vacuum suction cups to take out unqualified small CT transformers in a classified mode.

Description

Technical Field

[0001] The present invention relates to the technical fields of resistance value detection and ratio difference, and particularly relates to a device and method for automatically detecting resistance value and ratio difference. Background Art

[0002] In the field of modern electronic device manufacturing, as a key component, the small CT current transformer plays a crucial role in the operation of the entire device with the accuracy and stability of its performance. The small CT current transformer is mainly used for current transformation, converting large current into small current for measurement, protection, control, etc. In many industries such as power systems, industrial automation, and smart grids, the demand for small CT current transformers is huge, and the requirements for their quality and performance are also increasing day by day.

[0003] For traditional detection of small CT current transformers, it is necessary to manually fix the small CT current transformer and then hold the detection needle for measurement, which is not only inefficient but also labor-intensive. In actual production, there are many drawbacks to this traditional detection method: manual operation can only detect one small CT current transformer at a time, and a large amount of time is consumed in the process of fixing the current transformer and connecting the detection needle. With the continuous expansion of production scale, the detection demand for small CT current transformers has increased exponentially. The traditional method is difficult to meet the detection speed requirements of mass production, resulting in an extended production cycle, seriously affecting production efficiency and the market competitiveness of enterprises. Operators need to repeat operations such as fixing and measuring for a long time, which not only requires high concentration of attention but also causes great fatigue to the body. It is impossible to ensure the consistency and reliability of detection accuracy and difficult to meet the detection requirements of high-precision products. In the trend of modern manufacturing towards high automation, the traditional manual detection method cannot be connected with the automated production process. This makes the entire production process unable to achieve highly efficient operation of full automation, restricting the space for enterprises to further improve production efficiency and reduce costs. Therefore, to solve the above problems, this solution proposes a device and method for automatically detecting resistance value and ratio difference. Summary of the Invention

[0004] The object of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide a device and method for automatically detecting resistance value and ratio difference. Precise positioning of a small CT transformer is achieved through three-axis directional movement, and then the second group of cylinders drives the upper insertion pin and the probe to press down. The functional element detector applies a certain value of current to the upper insertion pin, and then the probe feeds back a signal to the functional element detector. The functional element detector then records the qualified and unqualified signals into the PLC. After repeating the operation for the entire coil, the third group of cylinders drives the positioning shaft and another group of probes to press down. After the probe contacts the small CT transformer, it feeds back a signal to the resistance value detector, and the resistance value detector then records the qualified and unqualified signals into the PLC. After repeating the operation for the entire coil, screening is completed through calculation by the PLC. The third group of cylinders drives the vacuum suction cup to classify and take out the unqualified small CT transformers, realizing automatic detection and automatic material taking of the small CT transformers.

[0005] The present invention also provides a device for automatically detecting resistance value and ratio difference, including: a three-axis platform, a functional element detector, and a resistance value detector. The three-axis platform includes an X-axis, a Y-axis, and a Z-axis. A cylinder fixed base plate is provided on the Y-axis, and a cylinder is fixedly connected to the outer surface of the cylinder fixed base plate. There are three groups of cylinders. The output ends of the first group of cylinders are all fixedly connected with suction cup seats, and a vacuum suction cup is fixedly connected to the outer surface of the suction cup seats. The output ends of the second and third groups of cylinders are all fixedly connected with probe seats, and a probe is fixedly connected to the outer surface of the probe seats. The output ends of the second and third groups of cylinders are all fixedly connected with insertion pin seats. An upper insertion pin is fixedly connected to the surface of the insertion pin seat at the output end of the second group of cylinders, and a positioning shaft is fixedly connected to the surface of the probe seat at the output end of the third group of cylinders;

[0006] A base plate is fixedly connected to the Y-axis. The left and right sides of the upper surface of the base plate are fixedly connected with side plates, a copper plate is fixedly connected to the upper surface of the side plates, a base is fixedly connected to the upper surface of the copper plate, a tray is fixedly connected to the upper surface of the base, a small CT transformer is arranged inside the tray, protective plates are fixedly connected to the front and rear sides of the upper surface of the base plate, the resistance value detector is electrically connected to the small CT transformer, and the functional element detector is electrically connected to the small CT transformer.

[0007] According to the device for automatically detecting resistance value and ratio difference provided by the present invention, a crown spring jack is provided on the outer surface of the copper plate, and a through hole is provided on the outer surface of the base. The crown spring jack is communicated with the through hole.

[0008] According to the device for automatically detecting resistance value and ratio difference provided by the present invention, both ends of the protective plate are respectively connected to the side plates.

[0009] An apparatus for automatically detecting resistance value and ratio difference provided by the present invention, a vacuum generator is fixedly connected to the outer surface of the cylinder fixed base plate, and a pressure switch is fixedly connected to the outer surface of the cylinder fixed base plate.

[0010] An apparatus for automatically detecting resistance value and ratio difference provided by the present invention, a tray positioning block is fixedly connected to the lower surface of the tray, and the tray positioning block is connected to the base.

[0011] An apparatus for automatically detecting resistance value and ratio difference provided by the present invention, a pneumatic triple unit is fixedly connected to the side surface of the three-axis platform, and the pneumatic triple unit is connected to the cylinder through an air pipe.

[0012] An apparatus for automatically detecting resistance value and ratio difference provided by the present invention, the moving components in the three-axis platform move directionally along the X-axis, Y-axis, and Z-axis respectively, and a PLC system is provided in the three-axis platform.

[0013] A method for automatically detecting resistance value and ratio difference provided by the present invention includes the following steps:

[0014] Precise sequential positioning of the small CT transformer is achieved through directional movement along the X-axis, Y-axis, and Z-axis. Then, the second group of cylinders and the third group of cylinders will adopt simultaneous and separate pressing methods according to the specific position of the detected small CT transformer. After the second group of cylinders press down, the upper pins on the second group of cylinders will accurately insert into the jacks on the bottom plate to form a reliable circuit. The PLC system will instruct the functional element detector to connect a certain value of current to the above circuit. The probes on the second group of cylinders will collect the secondary current of the small CT transformer and feedback it to the detection precision transformer detection instrument. The PLC system will collect the current data and detection result data of the detection instrument and save them. After the third group of cylinders press down, the positioning shafts on the third group of cylinders will accurately insert into the center circle of the corresponding small CT transformer of the third group of cylinders. The probes on the third group of cylinders will connect to the secondary circuit of the corresponding small CT transformer. The precision digital multimeter will measure the internal resistance value of the product. The PLC system will read the measured internal resistance value and save it;

[0015] After the above two measurements are completed, the second group of cylinders and the third group of cylinders will rise to their original positions;

[0016] The X-axis, Y-axis, and Z-axis will accurately move to the next product position and start the next measurement;

[0017] Repeat this process until all products are measured; after all the products to be measured are completed and all data collection is finished, the PLC system will compare the collected and saved product data with the preset judgment rules to identify unqualified products and record the positions of defective products; then, the X-axis, Y-axis, and Z-axis will accurately move to the positions of unqualified products according to the recorded defective product position data in a specific order. The first group of cylinders will press down. After pressing down to the required position, the PLC system will turn on the vacuum generator. At the same time, the PLC system will monitor the generated negative pressure value. When the negative pressure value reaches the requirement, the PLC system will raise the first group of cylinders and the unqualified product will also be sucked up. Then, the PLC system will drive the three-axis platform to move the unqualified product to the designated position. After that, the vacuum generator will stop, and the unqualified product will be dropped into the designated unqualified product box. The unqualified products will be dropped into the corresponding boxes according to the reasons for product unqualifiedness;

[0018] After that, the three-axis platform will accurately move to the position of the next unqualified product and perform the above process of taking the unqualified product until all unqualified products are taken out; in this way, this measurement is completed, and the next measurement can be carried out, and this cycle repeats.

[0019] Compared with the prior art, an automatic resistance value and ratio difference detection device and method of the present invention realizes precise positioning of small CT transformers through three-axis directional movement. Then, the second group of cylinders drives the upper insertion pins and probes to press down. The functional element detector applies a certain value of current to the upper insertion pins, and then the probes feed back signals to the functional element detector. The functional element detector then records the qualified and unqualified signals into the PLC. After repeating the entire reel operation, the third group of cylinders drives the positioning shaft and another group of probes to press down. After the probes contact the small CT transformer, they feed back signals to the resistance value detector. The resistance value detector then records the qualified and unqualified signals into the PLC. After repeating the entire reel operation, the screening is completed through the calculation of the PLC. The third group of cylinders drives the vacuum suction cup to classify and take out the unqualified small CT transformers, realizing the automatic detection and automatic material taking of small CT transformers. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the drawings and embodiments;

[0021] Figure 1 It is the overall diagram of an automatic resistance value and ratio difference detection device of the present invention;

[0022] Figure 2 It is the partial structural schematic diagram of an automatic resistance value and ratio difference detection device of the present invention;

[0023] Figure 3 It is the partial structural sectional view of an automatic resistance value and ratio difference detection device of the present invention;

[0024] Figure 4For an apparatus of the present invention for automatically detecting resistance value and ratio difference Figure 1 The enlarged view at position A in

[0025] Legend description:

[0026] 1. Three-axis platform; 2. Side plate; 3. Bottom plate; 4. Base; 5. Copper plate; 6. Pneumatic triple unit; 7. Cylinder fixed bottom plate; 8. Suction cup seat; 9. Pin socket; 10. Probe seat; 11. Positioning shaft; 12. Tray positioning block; 13. Upper pin; 14. Guard plate; 15. Cylinder; 16. Crown spring jack; 17. Function element detector; 18. Probe; 19. Small CT mutual inductor; 20. Tray; 21. Pressure switch; 22. Vacuum generator; 23. Vacuum suction cup; 24. Resistance value detector. Specific implementation manners

[0027] This part will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the drawings. The function of the drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it should not be construed as a limitation on the protection scope of the present invention.

[0028] Referring to Figures 1-4 , an apparatus for automatically detecting resistance value and ratio difference according to an embodiment of the present invention includes: a three-axis platform 1, a function element detector 17, and a resistance value detector 24. The three-axis platform 1 includes an X-axis, a Y-axis, and a Z-axis. A cylinder fixed bottom plate 7 is provided on the Y-axis. The outer surface of the cylinder fixed bottom plate 7 is fixedly connected to a cylinder 15. There are three groups of cylinders 15. The output ends of the first group of cylinders 15 are all fixedly connected to a suction cup seat 8. The outer surface of the suction cup seat 8 is fixedly connected to a vacuum suction cup 23. The output ends of the second and third groups of cylinders 15 are all fixedly connected to a probe seat 10. The outer surface of the probe seat 10 is fixedly connected to a probe 18. The output ends of the second and third groups of cylinders 15 are all fixedly connected to a pin socket 9. The surface of the pin socket 9 located at the output end of the second group of cylinders 15 is fixedly connected to an upper pin 13. The surface of the probe seat 10 located at the output end of the third group of cylinders 15 is fixedly connected to a positioning shaft 11;

[0029] A bottom plate 3 is fixedly connected to the Y-axis. The left and right sides of the upper surface of the bottom plate 3 are fixedly connected to side plates 2. The upper surface of the side plates 2 is fixedly connected to a copper plate 5. The upper surface of the copper plate 5 is fixedly connected to a base 4. The upper surface of the base 4 is fixedly connected to a tray 20. A small CT mutual inductor 19 is provided inside the tray 20. The front and rear sides of the upper surface of the bottom plate 3 are fixedly connected to guard plates 14. The resistance value detector 24 is electrically connected to the small CT mutual inductor 19. The function element detector 17 is electrically connected to the small CT mutual inductor 19. A crown spring jack 16 is provided on the outer surface of the copper plate 5. A through hole is provided on the outer surface of the base 4. The crown spring jack 16 is communicated with the through hole. The two ends of the guard plate 14 are respectively connected to the side plates 2.

[0030] A vacuum generator 22 is fixedly connected to the outer surface of the cylinder fixing base plate 7, and a pressure switch 21 is fixedly connected to the outer surface of the cylinder fixing base plate 7. A pallet positioning block 12 is fixedly connected to the lower surface of the pallet 20, and the pallet positioning block 12 is connected to the base 4. A pneumatic triple unit 6 is fixedly connected to the side surface of the three-axis platform 1, and the pneumatic triple unit 6 is connected to the cylinder 15 through an air pipe. The moving parts in the three-axis platform 1 move directionally along the X-axis, Y-axis, and Z-axis respectively, and a PLC system is provided in the three-axis platform 1.

[0031] In an embodiment of the present invention, a method for automatically detecting resistance value and ratio difference includes the following steps: precise sequential positioning of the small CT transformer 19 is achieved through directional movement along the X-axis, Y-axis, and Z-axis. Then, the second group of cylinders 15 and the third group of cylinders 15 will adopt simultaneous and separate pressing methods according to the specific position of the detected small CT transformer 19. After the second group of cylinders 15 press down, the upper insertion pins 13 on the second group of cylinders 15 will accurately insert into the jacks on the bottom plate 3 to form a reliable circuit. The PLC system will instruct the function element detector 17 to connect a certain value of current to the above circuit. The probes 18 on the second group of cylinders 15 will collect the secondary current of the small CT transformer 19 and feedback it to the detection precision transformer detection instrument. The PLC system will collect the current data and detection result data of the detection instrument and save them.

[0032] After the third group of cylinders 15 press down, the positioning shaft 11 on the third group of cylinders 15 will accurately insert into the center circle of the corresponding small CT transformer 19 of the third group of cylinders 15. The probes 18 on the third group of cylinders 15 will be connected to the secondary circuit of the corresponding small CT transformer 19. The precision digital multimeter will measure the internal resistance value of the product. The PLC system will read the measured internal resistance value and save it. After the above two measurements are completed, the second group of cylinders 15 and the third group of cylinders 15 will rise to the original position. The X-axis, Y-axis, and Z-axis will accurately move to the next product position and start the next measurement. This cycle continues until all products are measured.

[0033] After all the data collection is completed for the products being measured, the PLC system will compare with the collected and saved product data according to the preset judgment rules to identify unqualified products and record the positions of defective products. Then, the X-axis, Y-axis, and Z-axis will accurately move to the positions of unqualified products according to the recorded defective product position data in a specific order. The first group of cylinders 15 will press down. After pressing down in place, the PLC system will turn on the vacuum generator 22. At the same time, the PLC system will monitor the generated negative pressure value. When the negative pressure value reaches the requirement, the PLC system will raise the first group of cylinders 15 and the unqualified products will also be sucked up. Then, the PLC system will drive the three-axis platform 1 to move the unqualified products to the designated position. After that, the vacuum generator 22 will stop, and the unqualified products will be thrown into the designated unqualified product box. The unqualified products will be thrown into the corresponding boxes according to the reasons for product unqualified.

[0034] After that, the three-axis platform 1 will accurately move to the position of the next unqualified product and execute the above process of taking the unqualified product until all unqualified products are taken; in this way, this measurement is completed, and the next measurement can be carried out again, and so on in a cycle.

[0035] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. A device for automatically detecting resistance value and ratio difference, characterized in that: include: A three-axis platform (1), a functional element detector (17), and a resistance value detector (24), wherein the three-axis platform (1) comprises an X-axis, a Y-axis, and a Z-axis, wherein a cylinder fixing base plate (7) is provided on the Y-axis, and a cylinder (15) is fixedly connected to the outer surface of the cylinder fixing base plate (7), wherein the cylinder (15) is provided in three groups, wherein the output ends of the cylinders (15) in the first group are fixedly connected to a suction cup seat (8), and the outer surface of the suction cup seat (8) is fixedly connected to a vacuum suction cup (23), wherein the output ends of the cylinders (15) in the second and third groups are fixedly connected to a probe seat (10), and the outer surface of the probe seat (10) is fixedly connected to a probe (18), wherein the output ends of the cylinders (15) in the second and third groups are fixedly connected to a pin seat (9), and the surface of the pin seat (9) at the output end of the cylinders (15) in the second group is fixedly connected to an upper pin (13), and the surface of the probe seat (10) at the output end of the cylinders (15) in the third group is fixedly connected to a positioning shaft (11); A bottom plate (3) is fixedly connected to the Y axis, side plates (2) are fixedly connected to the left and right sides of the upper surface of the bottom plate (3), a copper plate (5) is fixedly connected to the upper surface of the side plate (2), a base (4) is fixedly connected to the upper surface of the copper plate (5), a tray (20) is fixedly connected to the upper surface of the base (4), a small CT mutual inductor (19) is provided inside the tray (20), a guard plate (14) is fixedly connected to the front and rear sides of the upper surface of the bottom plate (3), the resistance detector (24) is electrically connected to the small CT mutual inductor (19), and the functional element detector (17) is electrically connected to the small CT mutual inductor (19).

2. The device for automatically detecting resistance value and ratio difference according to claim 1, characterized in that: The outer surface of the copper plate (5) is provided with a crown spring insertion hole (16), the outer surface of the base (4) is provided with a through hole, and the crown spring insertion hole (16) is connected to the through hole.

3. The device for automatically detecting resistance value and ratio difference according to claim 1, characterized in that: Both ends of the guard plate (14) are respectively connected to the side plates (2).

4. The device for automatically detecting resistance value and ratio difference according to claim 1, characterized in that: A vacuum generator (22) is fixedly connected to the outer surface of the cylinder fixed base plate (7), and a pressure switch (21) is fixedly connected to the outer surface of the cylinder fixed base plate (7).

5. The device for automatically detecting resistance value and ratio difference according to claim 1, characterized in that: A tray positioning block (12) is fixedly connected to the lower surface of the tray (20), and the tray positioning block (12) is connected to the base (4).

6. The device for automatically detecting resistance value and ratio difference according to claim 1, characterized in that: A pneumatic triplet (6) is fixedly connected to the side surface of the three-axis platform (1), and the pneumatic triplet (6) is connected to the cylinder (15) via an air pipe.

7. The device for automatically detecting resistance value and ratio difference according to claim 1, characterized in that: The movable parts in the three-axis platform (1) move directionally along the X-axis, the Y-axis and the Z-axis respectively, and a PLC system is provided in the three-axis platform (1).

8. A method for automatically detecting resistance and ratio difference, using a device for automatically detecting resistance and ratio difference as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: The small CT mutual inductor (19) is precisely positioned in sequence by directional movement along the X-axis, Y-axis and Z-axis, and then the second group of cylinders (15) and the third group of cylinders (15) are pressed down simultaneously or separately according to the specific position of the small CT mutual inductor (19) to be detected; after the second group of cylinders (15) are pressed down, the upper pins (13) on the second group of cylinders (15) are accurately inserted into the sockets of the bottom plate (3) to form a reliable circuit, and the PLC system will instruct the functional unit detector (17) to connect a certain value of current to the above circuit, and the probes (18) on the second group of cylinders (15) will collect the secondary current of the small CT mutual inductor (19) and feed it back to the precision mutual inductor detection instrument, and the PLC system will collect and save the current data and detection result data of the detection instrument; After the third group of cylinders (15) are pressed down, the positioning shaft (11) on the third group of cylinders (15) will be accurately inserted into the center circle of the small CT mutual inductor (19) corresponding to the third group of cylinders (15), and the probe (18) on the third group of cylinders (15) will be connected to the secondary circuit of the corresponding small CT mutual inductor (19), and the precision digital multimeter will measure the internal resistance value of the product, and the PLC system will read and save the measured internal resistance value; after the above two measurements are completed, the second group of cylinders (15) and the third group of cylinders (15) will rise to their original positions; the X-axis, Y-axis, and Z-axis will accurately move to the next product position and start the next measurement; this cycle will be repeated until all product measurements are completed; After all the product measurements are completed and all data collection is completed, the PLC system will compare the collected and saved product data according to the preset judgment rules, identify the unqualified products and record the positions of the unqualified products; then the X-axis, Y-axis and Z-axis will accurately move to the positions of the unqualified products in a specific order according to the recorded position data of the unqualified products, and the first group of cylinders (15) will be pressed down. After the pressure is in place, the PLC system will start the vacuum generator (22). At the same time, the PLC system will monitor the negative pressure value generated. When the negative pressure value reaches the requirement, the PLC system will raise the first group of cylinders (15) and the unqualified products will be sucked up. Then, the PLC system will drive the three-axis platform (1) to move the unqualified products to the specified position, and the vacuum generator (22) will stop. The unqualified products will be thrown into the specified unqualified product box. The unqualified products will be thrown into the corresponding boxes according to the reasons for the unqualified products. Afterwards, the three-axis platform (1) will accurately move to the next unqualified product position to execute the above-mentioned unqualified product removal process until all unqualified products are removed; in this way, the measurement is completed and the next measurement can be carried out, and the cycle continues.

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