Detection equipment and method based on basic diameter of piston

Abstract

The invention discloses detection equipment and method based on the basic diameter of a piston, and relates to the technical field of piston detection, the detection equipment comprises a mounting seat and a U-shaped frame mounted on one side of the mounting seat, and a distance measurement calibration piece is arranged on one side, away from the U-shaped frame, of a positioning seat. According to the device, the distance measurement calibration part is arranged, an infrared distance measurement sensor is started to measure the distance between a first calibration plate and one end of the infrared distance measurement sensor, and when a first servo motor drives a transmission shaft to rotate by 90 degrees, the first calibration plate moves to the inner side of a first storage bin; when the variable quantity of the numerical value on the infrared distance measuring sensor is equal to the distance between the first calibration plate and the second calibration plate, it is indicated that the infrared distance measuring sensor is in a normal operation state. In this way, the measurement data of the infrared distance measuring sensor can be calibrated, and the accuracy of the data detected by the infrared distance measuring sensor is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of piston detection, in particular to a detection device and method based on a piston basic diameter. Background Art

[0002] An infrared distance sensor is a sensing device that uses infrared rays as a medium for measurement. It is mainly used in modern science and technology and in the fields of industry and agriculture. The infrared distance sensor has a pair of infrared signal transmitting and receiving diodes, which are the emitter lens of the IRLED that emits the light beam and the positioning sensitive photoelectric detector. Its working principle is to use the infrared light emitted by the sensor to form a reflection process after it hits the object. After the reflection, the sensor receives the signal and calculates the distance between the object and the sensor after processing by the signal processor. The piston is a reciprocating component in the cylinder block of an automobile engine. The basic structure of a piston can be divided into a top, a head, and a skirt. The top of the piston is the main part of the combustion chamber, and its shape is related to the type of combustion chamber selected. Gasoline engines mostly use flat-top pistons, which have the advantage of a small heat absorption area. Diesel engine pistons often have various pits on the top. Their specific shape, position, and size must be adapted to the requirements of the mixture formation and combustion of the diesel engine. When testing the piston, its skirt diameter needs to be tested. Since the skirt of some pistons has an elliptical structure, the detection end of the infrared sensor generally needs to be moved to the bottom edge of the piston skirt when testing the piston, and the piston pin is staggered at a position of 90 degrees. At this time, the operation of testing the piston will be cumbersome, and the infrared ranging sensor cannot be calibrated accurately and quickly, resulting in the inability to judge the accuracy of the infrared ranging sensor before testing, which will affect the accuracy of the piston detection. Summary of the Invention

[0003] The purpose of the present invention is to provide a detection device and method based on the basic diameter of a piston in order to solve the problem that an infrared ranging sensor cannot be calibrated accurately and quickly.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a detection device based on the basic diameter of the piston, comprising a mounting seat and a U-shaped frame mounted on one side of the mounting seat, positioning seats being mounted on both sides of the U-shaped frame, a light-transmitting hole being provided on the inner side of the positioning seat, a ranging calibration piece being provided on the side of the positioning seat away from the U-shaped frame, the positioning seat being connected to an infrared ranging sensor through the ranging calibration piece, an extension rod being provided on the inner side of the U-shaped frame, a locking shaft being installed at one end of the extension rod, a positioning clip being provided on the inner side of the locking shaft, a piston being sleeved on the locking shaft, and a controller body being provided on one side of the mounting seat.

[0005] As a further solution of the present invention: the distance calibration component includes an L-shaped support frame installed on one side of the mounting seat, the top of the L-shaped support frame is installed on a first servo motor located above the infrared ranging sensor, the output end of the first servo motor is connected to a transmission shaft, the side of the positioning seat away from the U-shaped frame is installed on a calibration connecting pipe connected to the infrared ranging sensor, the top of the calibration connecting pipe is installed on the first storage bin, and the top of the calibration connecting pipe is provided with a second storage bin located on the side of the first storage bin away from the infrared ranging sensor, the top of the first storage bin is provided with a second traction rod extending to the inside of the calibration connecting pipe, and the bottom of the second traction rod is provided with a A first calibration plate is provided on the inner side of the calibration connecting tube, a first traction rod passing through the second storage bin is provided on the top of the second storage bin, a second calibration plate flush with the first calibration plate is provided on the bottom of the first traction rod, a cam is provided on the outer side of the transmission shaft and is located above the second traction rod, second guide grooves are provided on both sides of the cam, a second guide wheel is provided on the top of the second traction rod and is slidably connected to the second guide groove, a fan-shaped guide wheel is provided on the outer side of the transmission shaft and is located above the first traction rod, first guide grooves are provided on both sides of the fan-shaped guide wheel, and a first guide wheel is provided on the top of the first traction rod and is slidably connected to the first guide groove.

[0006] As a further solution of the present invention: the center of the first calibration plate, the center of the second calibration plate and the center of the calibration connecting tube are coaxial, and the center of the calibration connecting tube is coaxial with the center of the light-transmitting hole.

[0007] As a further solution of the present invention: the diameter of the second guide wheel is equal to the width of the second guide groove, and the diameter of the first guide wheel is equal to the width of the first guide groove.

[0008] As a further solution of the present invention: the distance from the first calibration plate to the second calibration plate is ten centimeters.

[0009] As a further solution of the present invention: the thickness of the first calibration plate is smaller than the width of the inner wall of the first storage bin, and the top of the calibration connecting tube is provided with a through groove with a width equal to the width of the inner wall of the first storage bin.

[0010] The top of the lifting gear is connected with the base through the upper end of the lower end of the gear train, and the lower end of the gear train is connected with the upper end of the gear train to the upper end of the gear train.

[0011] As a further solution of the present invention: the inner side of the clamping ring is provided with a through hole with a diameter larger than the diameter of the outer wall of the locking shaft, and a sliding groove with a width equal to that of the arc support plate. The through hole and sliding groove on the clamping ring are used to prevent the arc support plate from being obstructed by the clamping ring during movement.

[0012] As a further solution of the present invention: a threaded hole matching the bidirectional threaded rod is provided on the top of the threaded slider, and a sliding groove matching the threaded slider is provided on the inner side of the positioning frame.

[0013] The present invention also discloses a detection method based on the basic diameter of a piston, which uses the above-mentioned detection device based on the basic diameter of a piston, and includes the following steps: S1: When testing the piston, first put the piston on the locking shaft. At this time, the piston will flip under the action of its own gravity, so that the skirt of the piston faces upward and the top of the piston faces downward; S2: Activate the positioning clamp to make the center of the pin hole on the piston coaxial with the center of the locking shaft through the operation of the positioning clamp. At the same time, the positioning clamp is operated to move the piston to one end of the light-transmitting hole, so that the light-transmitting hole and the skirt of the piston are aligned. S3: The infrared distance sensor is activated through the controller body. At this time, the infrared light emitted by the infrared distance sensor will be blocked by the distance calibration component. At this time, the distance calibration component is activated to change the distance reading on the infrared distance sensor. If the data change value on the infrared distance sensor is the set value, it means that the infrared distance sensor is in normal operation. Thereafter, the infrared light emitted by the infrared distance sensor is unblocked by the operation of the distance calibration component. At this time, the infrared light emitted by the infrared distance sensor will illuminate the edge of the skirt of the piston; S4: At the same time, since the distance between the infrared ranging sensor and the center of the locking shaft is fixed, at this time, it is only necessary to subtract the fixed value of the infrared ranging sensor from the center of the locking shaft from the value displayed on the infrared ranging sensor to obtain the piston skirt radius.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting the distance calibration component, the infrared distance sensor is started to measure the distance between the first calibration plate and one end of the infrared distance sensor. When the first servo motor drives the transmission shaft to rotate ninety degrees, the first calibration plate moves to the inner side of the first storage bin, so that the infrared light emitted by the infrared distance sensor will illuminate one side of the second calibration plate. When the change in the value on the infrared distance sensor is equal to the distance between the first calibration plate and the second calibration plate, it indicates that the infrared distance sensor is in normal operation and that the data detected by the infrared distance sensor is accurate. When the first servo motor drives the transmission shaft to rotate ninety degrees again, the fan-shaped guide wheel will pull the first traction rod through the first guide groove and the first guide wheel, so that the second calibration plate loses the effect of blocking the infrared light emitted by the infrared distance sensor. In this way, the measurement data of the infrared distance sensor can be calibrated, further improving the accuracy of the detection data of the infrared distance sensor. 2. By setting a positioning clamp, start the second servo motor, and rotate the bidirectional threaded rod through the operation of the second servo motor, the threaded slider will move along the bidirectional threaded rod, so that the clamping ring at the bottom of the threaded slider clamps and limits the two sides of the piston, and then start the telescopic cylinder, and extend the telescopic cylinder to make the push plate push the pressure oblique rod to move, so that one end of the pressure oblique rod drives the lifting rod to move, so that the arc support plate moves in the direction away from the center of the locking shaft, so that the arc support plate can fit the inner wall of the pin hole on the piston, so that the center of the pin hole of the piston is coaxial with the center of the locking shaft, so that the position of the piston can be corrected and limited, so that the two sides of the skirt of the piston are aligned with the light-transmitting hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of the present invention as a whole; Figure 2 Schematic diagram of the bottom structure of the present invention; Figure 3 This is a schematic diagram of the connection between the U-shaped frame and the infrared ranging sensor of the present invention; Figure 4 This is a schematic diagram of the connection between the locking shaft and the clamping ring of the present invention; Figure 5 This is a schematic diagram of the internal structure of the locking shaft of the present invention; Figure 6 This is a schematic diagram of the connection between the transmission shaft and the calibration connecting pipe of the present invention; Figure 7 This is a schematic diagram of the internal structure of the calibration connecting pipe of the present invention; Figure 8 It is a schematic diagram of the connection between the cam and the fan-shaped guide wheel of the present invention.

[0016] Figure: 1, mounting base; 2, U-shaped frame; 3, L-shaped support frame; 4, extension rod; 5, infrared distance sensor; 6, piston; 7, locking shaft; 8, positioning base; 9, first servo motor; 10, second servo motor; 11, transmission shaft; 12, controller body; 13, calibration connecting pipe; 14, first calibration plate; 15, guide frame; 16, light hole; 17, positioning frame; 18, two-way threaded rod; 19, clamping ring; 20, screw Slider; 21. Through slot; 22. Limiting frame; 23. Arc-shaped support plate; 24. Lifting rod; 25. Pressure-pressing diagonal rod; 26. Pushing plate; 27. Telescopic cylinder; 28. First storage bin; 29. ​​Second storage bin; 30. First traction rod; 31. Second traction rod; 32. Cam; 33. Fan-shaped guide wheel; 34. First guide groove; 35. Second guide groove; 36. First guide wheel; 37. Second guide wheel; 38. Second calibration plate. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and should not be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a communication between the internal parts of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following describes an embodiment of the present invention based on its overall structure.

[0019] Example 1 See also Figures 1 to 8 In an embodiment of the present invention, a detection device based on the basic diameter of a piston includes a mounting base 1, a U-shaped frame 2 mounted on one side of the mounting base 1, positioning bases 8 are mounted on both sides of the U-shaped frame 2, a light-transmitting hole 16 is opened on the inner side of the positioning base 8, a distance measurement calibration component is provided on the side of the positioning base 8 away from the U-shaped frame 2, the positioning base 8 is connected to an infrared distance measurement sensor 5 through the distance measurement calibration component, an extension rod 4 is provided on the inner side of the U-shaped frame 2, a locking shaft 7 is installed at one end of the extension rod 4, a positioning clip is provided on the inner side of the locking shaft 7, a piston 6 is sleeved on the locking shaft 7, and a controller body 12 is provided on one side of the mounting base 1.

[0020] In this embodiment, when testing the piston 6, the piston 6 is first sleeved on the locking shaft 7. At this time, the piston 6 will flip under the action of its own gravity, so that the skirt of the piston 6 faces upward and the top of the piston 6 faces downward. Then, the positioning clamp is started, and the center of the pin hole on the piston 6 is made coaxial with the center of the locking shaft 7 through the operation of the positioning clamp. At the same time, the piston 6 is moved to one end of the light-transmitting hole 16 through the operation of the positioning clamp, so that the light-transmitting hole 16 and the skirt of the piston 6 are aligned. Then, the infrared distance sensor 5 is started through the controller body 12. At this time, the infrared light emitted by the infrared distance sensor 5 will be blocked by the distance calibration component. Block, at this time, the distance measurement calibration piece is started to change the distance reading on the infrared distance measurement sensor 5. If the data change value on the infrared distance measurement sensor 5 is the set value, it means that the infrared distance measurement sensor 5 is in normal operation. Thereafter, the infrared light emitted by the infrared distance measurement sensor 5 is unblocked through the operation of the distance measurement calibration piece. At this time, the infrared light emitted by the infrared distance measurement sensor 5 will be irradiated on the skirt edge of the piston 6. At the same time, since the distance between the infrared distance measurement sensor 5 and the center of the locking shaft 7 is fixed, at this time, only the fixed value of the infrared distance measurement sensor 5 from the center of the locking shaft 7 minus the value displayed on the infrared distance measurement sensor 5 is the skirt radius of the piston 6.

[0021] Example 2 Please refer to Figure 1 、 Figure 2 、 Figure 6 、 Figure 7 、 Figure 8The distance calibration component includes an L-shaped support frame 3 installed on one side of the mounting base 1, the top of the L-shaped support frame 3 is installed on the first servo motor 9 located above the infrared ranging sensor 5, the output end of the first servo motor 9 is connected to the transmission shaft 11, the positioning base 8 is installed on the side away from the U-shaped frame 2 to the calibration pipe 13 connected to the infrared ranging sensor 5, the top of the calibration pipe 13 is installed on the first storage bin 28, the top of the calibration pipe 13 is provided with a second storage bin 29 located on the side of the first storage bin 28 away from the infrared ranging sensor 5, the top of the first storage bin 28 is provided with a second traction rod 31 extending to the inside of the calibration pipe 13, and the bottom of the second traction rod 31 is provided with a second traction rod 31 located inside the calibration pipe 13. A calibration plate 14, a first traction rod 30 passing through the second storage bin 29 is provided on the top of the second storage bin 29, a second calibration plate 38 flush with the first calibration plate 14 is provided on the bottom of the first traction rod 30, a cam 32 located above the second traction rod 31 is provided on the outside of the transmission shaft 11, second guide grooves 35 are provided on both sides of the cam 32, a second guide wheel 37 slidably connected to the second guide groove 35 is provided on the top of the second traction rod 31, a fan-shaped guide wheel 33 located above the first traction rod 30 is provided on the outside of the transmission shaft 11, first guide grooves 34 are provided on both sides of the fan-shaped guide wheel 33, and a first guide wheel 36 slidably connected to the first guide groove 34 is provided on the top of the first traction rod 30.

[0022] Among them, the center of the first calibration plate 14, the center of the second calibration plate 38 and the center of the calibration connecting tube 13 are coaxial, the center of the calibration connecting tube 13 is coaxial with the center of the light-transmitting hole 16, the diameter of the second guide wheel 37 is equal to the width of the second guide groove 35, the diameter of the first guide wheel 36 is equal to the width of the first guide groove 34, the distance from the first calibration plate 14 to the second calibration plate 38 is ten centimeters, the thickness of the first calibration plate 14 is less than the width of the inner wall of the first storage bin 28, and the top of the calibration connecting tube 13 is provided with a through groove with a width equal to the width of the inner wall of the first storage bin 28.

[0023] In this embodiment: the infrared ranging sensor 5 is started, and the infrared light emitted by the infrared ranging sensor 5 is irradiated on the first calibration plate 14 to measure the distance between the first calibration plate 14 and one end of the infrared ranging sensor 5, and then the first servo motor 9 is started, and the first servo motor 9 drives the transmission shaft 11 to slowly rotate one hundred and eighty degrees so that the first calibration plate 14 and the second calibration plate 38 lose the obstruction of the light beam emitted by the infrared ranging sensor 5. When the first servo motor 9 drives the transmission shaft 11 to rotate ninety degrees, the protrusion of the cam 32 will turn to a horizontal state. At this time, the cam 32 pulls the second traction rod 31 upward through the second guide groove 35 and the second guide wheel 37, so as to move the first calibration plate 14 to the inner side of the first storage bin 28. During this process, the first guide wheel 36 moves from one side of the edge of the fan-shaped guide wheel 33 to the other side. At this time, the horizontal height of the second calibration plate 38 remains unchanged, so that the infrared ranging sensor 5 can be moved to the inner side of the first storage bin 28. The infrared light emitted by the ranging sensor 5 will illuminate one side of the second calibration plate 38. At this time, the value on the infrared ranging sensor 5 will change. The changed value will then be compared with the distance between the first calibration plate 14 and the second calibration plate 38. When the change in the value on the infrared ranging sensor 5 is equal to the distance between the first calibration plate 14 and the second calibration plate 38, it means that the infrared ranging sensor 5 is in normal operation, and it also means that the data detected by the infrared ranging sensor 5 is accurate. When the first servo motor 9 drives the transmission shaft 11 to rotate ninety degrees again, the fan-shaped guide wheel 33 will pull the first traction rod 30 through the first guide groove 34 and the first guide wheel 36, so that the second calibration plate 38 loses the effect of blocking the infrared light emitted by the infrared ranging sensor 5. In this way, the measurement data of the infrared ranging sensor 5 can be calibrated, further improving the accuracy of the detection data of the infrared ranging sensor 5.

[0024] Example 3 Please refer to Figures 1 to 5The positioning clamp includes a positioning frame 17 installed on the top of the U-shaped frame 2. Guide frames 15 connected to the transmission shaft 11 are provided on both sides of the positioning frame 17. The central section of the transmission shaft 11 is supported by the guide frames 15. A second servo motor 10 is installed on the top of the positioning frame 17. The output end of the second servo motor 10 is connected to a bidirectional threaded rod 18 located above the positioning frame 17. Two threaded sliders 20 are sleeved on the bidirectional threaded rod 18. The two threaded sliders 20 are symmetrically arranged along the vertical center axis of the bidirectional threaded rod 18. The threaded A clamping ring 19 is provided at the bottom of the slider 20, a through groove 21 is opened on the outer wall of the locking shaft 7, a limit frame 22 is installed on the inner wall of the locking shaft 7, a lifting rod 24 is inserted on the limit frame 22, and an arc-shaped support plate 23 located on the inner side of the through groove 21 is installed on the top of the lifting rod 24. The bottom of the lifting rod 24 is connected to the pressure inclined rod 25 through a rotating shaft, and one end of the pressure inclined rod 25 is connected to the push plate 26 through a rotating shaft. The inner side of the locking shaft 7 is installed on the telescopic cylinder 27, and the output end of the telescopic cylinder 27 is connected to the push plate 26.

[0025] Among them, the inner side of the clamping ring 19 is provided with a through hole with a diameter larger than the outer wall diameter of the locking shaft 7, and a sliding groove with a width equal to that of the arc support plate 23. The through hole and sliding groove on the clamping ring 19 are used to prevent the arc support plate 23 from being obstructed by the clamping ring 19 during movement. The top of the threaded slider 20 is provided with a threaded hole matching the bidirectional threaded rod 18, and the inner side of the positioning frame 17 is provided with a sliding groove matching the threaded slider 20.

[0026] In this embodiment: the second servo motor 10 is started, and the bidirectional threaded rod 18 is rotated by the operation of the second servo motor 10. At this time, the threaded slider 20 will move along the bidirectional threaded rod 18, so that the clamping ring 19 at the bottom of the threaded slider 20 clamps and limits the two sides of the piston 6. Then, the telescopic cylinder 27 is started, and the extension of the telescopic cylinder 27 is used to make the pushing plate 26 push the pressing inclined rod 25 to move, so that one end of the pressing inclined rod 25 drives the lifting rod 24 to move, so that the arc support plate 23 moves in the direction away from the center of the locking shaft 7, so that the arc support plate 23 can be fitted with the inner wall of the pin hole on the piston 6, so that the center of the pin hole of the piston 6 is coaxial with the center of the locking shaft 7, so that the position of the piston 6 can be corrected and limited, so that the two sides of the skirt of the piston 6 are aligned with the light-transmitting hole 16.

[0027] In combination with the above-mentioned detection device based on the basic diameter of the piston, a detection method based on the basic diameter of the piston is provided below, which specifically includes the following steps: S1: When testing the piston 6, first sleeve the piston 6 onto the locking shaft 7. At this time, the piston 6 will flip under the action of its own gravity, so that the skirt of the piston 6 faces upward and the top of the piston 6 faces downward; S2: Start the second servo motor 10, and the operation of the second servo motor 10 makes the bidirectional threaded rod 18 rotate. At this time, the threaded slider 20 will move along the bidirectional threaded rod 18, so that the clamping ring 19 at the bottom of the threaded slider 20 clamps and limits the two sides of the piston 6. Then start the telescopic cylinder 27, and the extension of the telescopic cylinder 27 makes the pushing plate 26 push the pressing inclined rod 25 to move, so that one end of the pressing inclined rod 25 drives the lifting rod 24 to move, so that the arc support plate 23 moves in the direction away from the center of the locking shaft 7, so that the arc support plate 23 can fit with the inner wall of the pin hole on the piston 6, so that the center of the pin hole of the piston 6 is coaxial with the center of the locking shaft 7, so that the position of the piston 6 can be corrected and limited, so that the two sides of the skirt of the piston 6 are aligned with the light transmission hole 16; S3: Start the infrared ranging sensor 5, and measure the distance between the first calibration plate 14 and one end of the infrared ranging sensor 5 by irradiating the infrared light emitted by the infrared ranging sensor 5 on the first calibration plate 14. Then start the first servo motor 9, and drive the transmission shaft 11 to slowly rotate one hundred and eighty degrees through the first servo motor 9 so that the first calibration plate 14 and the second calibration plate 38 no longer block the light beam emitted by the infrared ranging sensor 5. When the first servo motor 9 drives the transmission shaft 11 to rotate ninety degrees, the protrusion of the cam 32 will turn to a horizontal state. At this time, the cam 32 pulls the second traction rod 31 upward through the second guide groove 35 and the second guide wheel 37, so as to move the first calibration plate 14 to the inner side of the first storage bin 28. During this process, the first guide wheel 36 moves from one side of the edge of the fan-shaped guide wheel 33 to the other side. At this time, the horizontal height of the second calibration plate 38 remains unchanged, so that the infrared ranging The infrared light emitted by the sensor 5 will illuminate one side of the second calibration plate 38, and the value on the infrared distance sensor 5 will change. The changed value will then be compared with the distance between the first calibration plate 14 and the second calibration plate 38. When the change in the value on the infrared distance sensor 5 is equal to the distance between the first calibration plate 14 and the second calibration plate 38, it means that the infrared distance sensor 5 is in a normal operating state, and the data detected by the infrared distance sensor 5 is accurate. When the first servo motor 9 drives the transmission shaft 11 to rotate ninety degrees again, the fan-shaped guide wheel 33 will pull the first traction rod 30 through the first guide groove 34 and the first guide wheel 36, so that the second calibration plate 38 loses the effect of blocking the infrared light emitted by the infrared distance sensor 5. In this way, the measurement data of the infrared distance sensor 5 can be calibrated, further improving the accuracy of the detection data of the infrared distance sensor 5. S4: At the same time, since the distance between the infrared distance sensor 5 and the center of the locking shaft 7 is fixed, at this time, it is only necessary to subtract the fixed value of the infrared distance sensor 5 from the center of the locking shaft 7 from the value displayed on the infrared distance sensor 5 to obtain the skirt radius of the piston 6.

[0028] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A detection device based on the basic diameter of a piston, comprising a mounting seat (1), a U-shaped frame (2) mounted on one side of the mounting seat (1), characterized in that: Positioning seats (8) are installed on both sides of the U-shaped frame (2), and a light-transmitting hole (16) is opened on the inner side of the positioning seat (8). A distance calibration piece is provided on the side of the positioning seat (8) away from the U-shaped frame (2), and the positioning seat (8) is connected to an infrared distance sensor (5) through the distance calibration piece. An extension rod (4) is provided on the inner side of the U-shaped frame (2), and a locking shaft (7) is installed on one end of the extension rod (4). A positioning clamping piece is provided on the inner side of the locking shaft (7), and a piston (6) is sleeved on the locking shaft (7). A controller body (12) is provided on one side of the mounting seat (1); The distance calibration component comprises an L-shaped support frame (3) mounted on one side of the mounting seat (1), the top of the L-shaped support frame (3) is mounted on a first servo motor (9) located above the infrared distance sensor (5), the output end of the first servo motor (9) is connected to a transmission shaft (11), the side of the positioning seat (8) away from the U-shaped frame (2) is mounted on a calibration connecting pipe (13) connected to the infrared distance sensor (5), the top of the calibration connecting pipe (13) is mounted on a first storage bin (28), the top of the calibration connecting pipe (13) is provided with a second storage bin (29) located on the side of the first storage bin (28) away from the infrared distance sensor (5), the top of the first storage bin (28) is provided with a second traction rod (31) extending to the inside of the calibration connecting pipe (13), and the bottom of the second traction rod (31) is provided with a first traction rod located inside the calibration connecting pipe (13). A calibration plate (14), a first traction rod (30) passing through the second storage bin (29) is provided on the top of the second storage bin (29), a second calibration plate (38) flush with the first calibration plate (14) is provided on the bottom of the first traction rod (30), a cam (32) located above the second traction rod (31) is provided on the outside of the transmission shaft (11), second guide grooves (35) are provided on both sides of the cam (32), a second guide wheel (37) slidably connected to the second guide groove (35) is provided on the top of the second traction rod (31), a fan-shaped guide wheel (33) located above the first traction rod (30) is provided on the outside of the transmission shaft (11), first guide grooves (34) are provided on both sides of the fan-shaped guide wheel (33), and a first guide wheel (36) slidably connected to the first guide groove (34) is provided on the top of the first traction rod (30).

2. The detection device based on the basic diameter of the piston according to claim 1, characterized in that: The center of the first calibration plate (14), the center of the second calibration plate (38) and the center of the calibration connecting tube (13) are coaxial, and the center of the calibration connecting tube (13) is coaxial with the center of the light-transmitting hole (16).

3. The detection device based on the basic diameter of the piston according to claim 2, characterized in that: The diameter of the second guide wheel (37) is equal to the width of the second guide groove (35), and the diameter of the first guide wheel (36) is equal to the width of the first guide groove (34).

4. The detection device based on the basic diameter of the piston according to claim 3, characterized in that: The distance between the first calibration plate (14) and the second calibration plate (38) is ten centimeters.

5. The detection device based on the basic diameter of the piston according to claim 3, characterized in that: The thickness of the first calibration plate (14) is smaller than the width of the inner wall of the first storage bin (28), and the top of the calibration connecting tube (13) is provided with a through groove having a width equal to the width of the inner wall of the first storage bin (28).

6. The detection device based on the basic diameter of the piston according to claim 5, characterized in that: The positioning clamping member includes a positioning frame (17) installed on the top of the U-shaped frame (2), and guide frames (15) connected to the transmission shaft (11) are provided on both sides of the positioning frame (17), and the central section of the transmission shaft (11) is supported by the guide frames (15). A second servo motor (10) is installed on the top of the positioning frame (17), and the output end of the second servo motor (10) is connected to a bidirectional threaded rod (18) located above the positioning frame (17), and two threaded sliders (20) are sleeved on the bidirectional threaded rod (18), and the two threaded sliders (20) are symmetrically arranged along the vertical center axis of the bidirectional threaded rod (18). The threaded sliders A clamping ring (19) is provided at the bottom of (20), a through groove (21) is provided on the outer wall of the locking shaft (7), a limiting frame (22) is installed on the inner wall of the locking shaft (7), a lifting rod (24) is inserted on the limiting frame (22), and an arc-shaped support plate (23) located on the inner side of the through groove (21) is installed on the top of the lifting rod (24), the bottom of the lifting rod (24) is connected to a pressure inclined rod (25) through a rotating shaft, and one end of the pressure inclined rod (25) is connected to a push plate (26) through a rotating shaft, and the inner side of the locking shaft (7) is installed on the telescopic cylinder (27), and the output end of the telescopic cylinder (27) is connected to the push plate (26).

7. The detection device based on the basic diameter of the piston according to claim 6, characterized in that: The inner side of the clamping ring (19) is provided with a through hole having a diameter greater than the outer wall diameter of the locking shaft (7), and a sliding groove having a width equal to that of the arc-shaped support plate (23). The through hole and the sliding groove on the clamping ring (19) prevent the arc-shaped support plate (23) from being obstructed by the clamping ring (19) during movement.

8. The detection device based on the basic diameter of the piston according to claim 7, characterized in that: The top of the threaded slider (20) is provided with a threaded hole matching the bidirectional threaded rod (18), and the inner side of the positioning frame (17) is provided with a sliding groove matching the threaded slider (20).

9. A detection method based on the basic diameter of the piston, characterized in that: The detection device based on the basic diameter of a piston according to any one of claims 1 to 8 comprises the following steps: S1: When testing the piston (6), the piston (6) is first sleeved on the locking shaft (7). At this time, the piston (6) will turn over under the action of its own weight, so that the skirt of the piston (6) faces upward and the top of the piston (6) faces downward; S2: activating the positioning clamping member, and making the center of the pin hole on the piston (6) coaxial with the center of the locking shaft (7) by the operation of the positioning clamping member, and at the same time moving the piston (6) to one end of the light-transmitting hole (16) by the operation of the positioning clamping member, so that the light-transmitting hole (16) and the skirt of the piston (6) are aligned; S3: The infrared distance sensor (5) is activated by the controller body (12). At this time, the infrared light emitted by the infrared distance sensor (5) is blocked by the distance calibration component. At this time, the distance reading on the infrared distance sensor (5) is changed by activating the distance calibration component. If the data change value on the infrared distance sensor (5) is the set value, it means that the infrared distance sensor (5) is in a normal operating state. Thereafter, the infrared light emitted by the infrared distance sensor (5) is unblocked by the operation of the distance calibration component. At this time, the infrared light emitted by the infrared distance sensor (5) is irradiated on the skirt edge of the piston (6); S4: At the same time, since the distance between the infrared distance sensor (5) and the center of the locking shaft (7) is fixed, at this time, it is only necessary to subtract the fixed value of the infrared distance sensor (5) from the center of the locking shaft (7) from the value displayed on the infrared distance sensor (5) to obtain the skirt radius of the piston (6).

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