A correction system based on linear sensor closed loop

Abstract

The invention discloses a correction system based on a linear sensor closed loop, which relates to a linear sensor, including an installation box, in which a detection mechanism for detecting displacement using air pressure is arranged, the detection mechanism includes a moving cylinder, an airbag strip is fixedly installed on the moving cylinder close to the inner wall of the installation box, one end of the airbag strip is provided with a control mechanism for controlling the air pressure in the airbag strip, the contraction length of the airbag strip is calculated by the gas discharge volume, and thus the moving distance of the moving frame is calculated, so that the linear sensor is not affected by the electric field during use, so that the sensing detection structure is more accurate.

Description

Technical Field

[0001] The invention relates to a linear sensor, in particular to a correction system based on a closed loop of a linear sensor. Background Art

[0002] Linear sensor, also known as displacement sensor, is a linear device belonging to metal induction. The function of the sensor is to convert various measured physical quantities into electrical quantities. In the production process, the measurement of displacement is generally divided into two types: measuring physical size and mechanical displacement. According to the different forms of transformation of the measured variable, displacement sensors can be divided into analog and digital types. The analog type can be divided into physical type and structural type. Commonly used displacement sensors are mostly analog structural types, including potentiometer displacement sensors, inductive displacement sensors, synchro, capacitive displacement sensors, eddy current displacement sensors, Hall displacement sensors, etc.

[0003] A Chinese patent discloses a linear displacement sensor calibration device (Announcement No. CN217179507U), including a shell with a cavity therein, characterized in that a screw rod with a slider thereon is arranged in the shell cavity, a moving grid of a capacitive grid scale and a moving core rod of a displacement sensor are respectively arranged on the slider, a fixed grid matched with the moving grid and a fixing part of the displacement sensor matched with the moving core rod are arranged in the shell cavity, the fixing part of the displacement sensor is electrically connected to a voltmeter arranged on the shell, and the moving grid of the capacitive grid scale is electrically connected to a display screen arranged on the shell. The invention operates a hand wheel to rotate the screw rod and drives the slider to move at the same time, so that displacement data is generated between the moving grid and the fixed grid on the slider and displayed on the display screen, and at the same time, the movement of the slider drives the moving core rod of the displacement sensor to move in the fixing part, and the voltage data induced when the moving core rod moves is displayed on the voltmeter, so that the accurate performance of the displacement sensor is tested and verified to ensure the accuracy of the verification.

[0004] Most of the above-mentioned existing linear sensors detect displacement distance in the form of electromagnetic fields, resistance and induction. The linear sensors have extremely high requirements on the environment. However, in the prior art, there are energized parts such as electronic components in the linear sensors, which cause certain interference in the use of the linear sensors. The interference of the linear sensors will affect the measurement accuracy. Therefore, the present invention provides a correction system based on a closed loop of the linear sensor to solve the above-mentioned problems. Summary of the invention

[0005] The object of the present invention is to provide a correction system based on a linear sensor closed loop to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A correction system based on a linear sensor closed loop includes an installation box, in which a detection mechanism for detecting displacement using air pressure is arranged, the detection mechanism includes a moving cylinder, an airbag strip is fixedly installed on the moving cylinder close to the inner wall of the installation box, and one end of the airbag strip is provided with a control mechanism for controlling the air pressure in the airbag strip, and the exhausted gas in the airbag strip is collected to calculate the moving distance of the object, so that the sensor detection will not be affected by external factors.

[0008] As a further solution of the present invention, a sliding groove is provided on the inner wall of the movable cylinder, a slider is slidably installed in the sliding groove, a movable ring is fixedly installed between the sliders, and the movable ring is fixedly installed on the end of the airbag strip away from the installation box, a fixed plate is fixedly installed on the end of the installation box close to the movable cylinder, and the end of the airbag strip away from the moving ring is fixedly installed on the side end of the fixed plate, and the fixed plate prevents the airbag strip from moving out of the installation box, resulting in inconvenient detection.

[0009] As a further solution of the present invention, sliding grooves are provided at the upper and lower ends of the movable cylinder, and a movable frame is slidably installed on the inner wall of the sliding groove, and a linkage block is fixedly installed between the movable frame and the movable ring. The sliding groove and the linkage block prevent the movable ring from tilting and rotating during the movement.

[0010] As a further scheme of the present invention, the control mechanism includes an air pressure pump, and the output end of the air pressure pump is fixedly installed on the end of the air bag strip away from the moving circle, and a pneumatic telescopic rod is fixedly installed on the outer wall of the air bag strip close to the air pressure pump. The control end of the air pressure pump is fixedly installed with a controller, and the side end of the controller is rotatably installed with a control telescopic rod for controlling the air inlet and outlet of the air pressure pump, and the end of the control telescopic rod away from the controller is rotatably connected to the side end of the pneumatic telescopic rod, and the control telescopic rod controls the air pressure pump to inflate or exhaust the air in the air bag strip, so that the air pressure in the air bag strip is maintained at the same as the air pressure.

[0011] As a further solution of the present invention, an air intake pipe is fixedly installed on the input end of the air pressure pump, a three-way pipe is fixedly installed on the end of the air pressure pump away from the air pressure pump, an air intake pipe is fixedly installed on the end of the three-way pipe away from the air intake pipe, an air intake one-way valve is fixedly installed on the end of the air intake pipe away from the three-way pipe, an air transfer pipe is fixedly installed on the lower end of the three-way pipe, and a control one-way valve is fixedly installed on the end of the air transfer pipe away from the three-way pipe, which makes it more convenient to transfer and collect the gas in the airbag strip through the pipeline, and the one-way valve is arranged to avoid air leakage.

[0012] As a further solution of the present invention, a pneumatic cylinder is fixedly installed on the lower end of the control one-way valve, a pneumatic pressure detector is fixedly installed on the upper end of the pneumatic cylinder, a data line is fixedly installed on the output end of the pneumatic pressure detector, a processor is fixedly installed on the end of the data line away from the control valve, and the moving distance of the moving circle is calculated by calculating the pneumatic pressure in the pneumatic cylinder.

[0013] As a further solution of the present invention, a reset switch is fixedly installed on the inner wall of the movable cylinder away from the installation box, a transmission line is fixedly installed on the control end of the reset switch, and the other end of the transmission line is fixedly installed on the side end of the processor, a pressure relief valve is fixedly installed on the lower end of the pneumatic cylinder, and a power-on line is fixedly installed on the control end of the pressure relief valve, and the other end of the power-on line is fixedly installed on the side end of the processor, so as to avoid detection errors caused by excessive air pressure in the pneumatic cylinder.

[0014] As a further solution of the present invention, a control line is fixedly installed on the control end of the control one-way valve, and a contact button is fixedly installed on the other end of the control line, and the contact button is fixedly installed on the end of the moving frame away from the linkage block. After the contact button makes the object no longer contact with the moving frame, the control one-way valve is energized to open, allowing the gas to re-enter the airbag strip.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. When the present invention is used, the contraction length of the airbag strip is calculated by the gas exhaust volume, thereby calculating the moving distance of the moving frame, so that the linear sensor is not affected by the electric field during use, so that the sensing detection structure is more accurate.

[0017] 2. When the present invention is used, during the detection process, the air pressure in the airbag strip is always kept consistent with the air pressure, thereby avoiding the impact of the environment on the airbag strip and reducing the error of the detection data. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the main structure of a correction system based on a linear sensor closed loop.

[0019] Figure 2 This is a schematic diagram of the structure of an installation box in a correction system based on a linear sensor closed loop.

[0020] Figure 3 This is a schematic diagram of the structure of a moving cylinder in a correction system based on a linear sensor closed loop.

[0021] Figure 4 It is a schematic diagram of the structure of the control mechanism in a correction system based on a linear sensor closed loop.

[0022] Figure 5This is a schematic diagram of the structure of an air pressure pump in a correction system based on a linear sensor closed loop.

[0023] Figure 6 This is a schematic diagram of the structure of a controller in a correction system based on a linear sensor closed loop.

[0024] Figure 7 It is a schematic diagram of the structure of a filter cartridge in a correction system based on a linear sensor closed loop.

[0025] Figure 8 This is a schematic diagram of the structure of an air pressure cylinder in a correction system based on a linear sensor closed loop.

[0026] In the figure: 1, installation box; 2, detection mechanism; 201, moving cylinder; 202, airbag strip; 203, slide groove; 204, slider; 205, moving ring; 206, slide groove; 207, moving frame; 208, linkage block; 209, buffer pad; 210, fixing plate; 211, insulation cover;

[0027] 3. Control mechanism; 301. Air pressure pump; 302. Pneumatic telescopic rod; 303. Controller; 304. Control telescopic rod; 305. Air inlet pipe; 306. Three-way pipe; 307. Air inlet check valve; 308. Air transmission pipe; 309. Control check valve;

[0028] 310. Air pressure cylinder; 311. Air pressure detector; 312. Data line; 313. Processor; 314. Control line; 315. Contact button; 316. Pressure relief valve; 317. Power-on line; 318. Reset switch; 319. Transfer line; 320. Intake pipe; 321. Filter cylinder; 322. Filter net; 323. Drying net. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0030] See also Figures 1 to 8In an embodiment of the present invention, a correction system based on a linear sensor closed loop includes an installation box 1, in which a detection mechanism 2 for detecting displacement using air pressure is provided, the detection mechanism 2 includes a moving cylinder 201, an airbag strip 202 is fixedly installed on the moving cylinder 201 close to the inner wall of the installation box 1, and the airbag strip 202 is configured as a retractable and foldable telescopic hose, so that the airbag strip 202 can be extended and retracted at will, and a control mechanism 3 for controlling the air pressure in the airbag strip 202 is provided at one end of the airbag strip 202, and the control mechanism 3 keeps the air pressure in the airbag strip 202 within a suitable range, so that the exhausted gas in the airbag strip 202 is collected, and the contraction distance of the airbag strip 202 is calculated.

[0031] See also Figures 1 to 3 A slide groove 203 is provided on the inner wall of the moving cylinder 201, and a slider 204 is slidably installed in the slide groove 203. A moving ring 205 is fixedly installed between the sliders 204, and the moving ring 205 is slidably set in the moving cylinder 201. The slider 204 and the slide groove 203 set in the moving cylinder 201 can prevent the moving ring 205 from tilting during the movement, and the moving ring 205 is fixedly installed at the end of the airbag strip 202 away from the installation box 1. When the moving ring 205 moves, the moving ring 205 squeezes the airbag strip 202 and starts to shrink. A fixed plate 210 is fixedly installed at one end of the installation box 1 close to the moving cylinder 201, and the end of the airbag strip 202 away from the moving ring 205 is fixedly installed on the side end of the fixed plate 210. The fixed plate 210 set in the installation box 1 can prevent the moving ring 205 from sliding into the installation box 1 when pushing the airbag strip 202.

[0032] See also Figures 1 to 3 The upper and lower ends of the moving cylinder 201 are provided with sliding grooves 206, and the internal fixed sleeve of the moving cylinder 201 is provided with an insulation sleeve 211, so that the airbag strip 202 will not be affected by the temperature, and the inner wall of the sliding groove 206 is slidably installed with a moving frame 207, and a linkage block 208 is fixedly installed between the moving frame 207 and the moving ring 205, and a buffer pad 209 is rotatably provided at one end of the moving frame 207 away from the linkage block 208. The buffer pad 209 arranged on the moving frame 207 plays a buffering role to prevent objects from colliding with the moving frame 207 and causing damage.

[0033] See also Figures 1 to 6The control mechanism 3 includes an air pressure pump 301, and the output end of the air pressure pump 301 is fixedly mounted on the end of the air bag strip 202 away from the moving circle 205. The air pressure pump 301 makes the air bag strip 202 more convenient to shrink and expand. A pneumatic telescopic rod 302 is fixedly mounted on the outer wall of the air bag strip 202 close to the air pressure pump 301. A controller 303 is fixedly mounted on the control end of the air pressure pump 301. The controller 303 is a prior art and will not be described in detail here. The controller 303 is a balanced controller 303, so that the controller 303 controls the air pressure pump 301. The working air intake and reverse air exhaust are more convenient. The side end of the controller 303 is rotatably installed with a control telescopic rod 304 for controlling the working air intake and exhaust of the air pressure pump 301, and the end of the control telescopic rod 304 away from the controller 303 is rotatably connected to the side end of the pneumatic telescopic rod 302. When the air pressure in the airbag strip 202 increases, the pneumatic telescopic rod 302 extends, and the pneumatic telescopic rod 302 pushes the control telescopic rod 304 to rotate, so that the controller 303 opens, and the air pressure pump 301 starts to work and exhaust, so that the air pressure in the airbag strip 202 is always maintained within an appropriate range.

[0034] See also Figures 1 to 8 An air intake pipe 305 is fixedly installed at the input end of the air pressure pump 301, a three-way pipe 306 is fixedly installed at one end of the air intake pipe 305 away from the air pressure pump 301, an air suction pipe 320 is fixedly installed at one end of the three-way pipe 306 away from the air intake pipe 305, an air intake check valve 307 is fixedly installed at one end of the air suction pipe 320 away from the three-way pipe 306, the air intake check valve 307 allows the gas to pass through the air intake check valve 307 when the air pressure pump 301 inhales, and the air intake check valve 307 is closed when exhausting, and a filter cartridge 321 is fixedly installed at one end of the air intake check valve 307 away from the air suction pipe 320, and the filter cartridge 321 is fixedly installed at the side end of the installation box 1, the filter cartridge A multi-layer filter screen 322 is fixedly installed in 321, and a drying screen 323 is fixedly installed between the filter screens 322. The drying screen 323 and the filter screen 322 are arranged to prevent the debris in the air from affecting the detection. An air transfer tube 308 is fixedly installed at the lower end of the three-way pipe 306, and a control check valve 309 is fixedly installed at one end of the air transfer tube 308 away from the three-way pipe 306. The control check valve 309 is an electronic control valve. When the power is on, the control check valve 309 is a ventilation check valve, so that the gas can only enter but not exit. When the control check valve 309 is not powered, the control check valve 309 is a ventilation valve of an electronic switch, so that the gas can enter and exit freely.

[0035] See also Figures 1 to 8, a pressure cylinder 310 is fixedly installed at the lower end of the control check valve 309, and a pressure detector 311 is fixedly installed at the upper end of the pressure cylinder 310. The pressure detector 311 is a prior art and will not be described in detail here. The pressure detector 311 detects the pressure change in the cylinder, and a data line 312 is fixedly installed at the output end of the pressure detector 311. A processor 313 is fixedly installed at one end of the data line 312 away from the control valve. The processor 313 is a prior art and will not be described in detail here. When the detected data is transmitted to the processor 313 through the data line 312, the processor 313 calculates the moving distance of the airbag strip 202 according to the pressure in the pressure cylinder 310, and the calculation formula and method are as follows:

[0036] The volume of gas in the air cylinder 310 is first calculated by the size of the air cylinder 310, and then the volume of gas in the air cylinder 310 under normal atmospheric pressure is calculated by combining the pressure in the air cylinder 310. The calculation formula is:

[0037] V1 / T1 = V2 / T2, where V1 and V2 are the gas volumes in two states respectively, and T1 and T2 are the corresponding gas pressures.

[0038] Where V1 in V1 / T1 is the volume of gas in the air cylinder 310, T1 is the gas pressure in the air cylinder 310, and T2 is the normal atmospheric pressure, so the volume V2 of V1 under normal atmospheric pressure is calculated. Because the air pressure in the airbag strip 202 is always maintained at normal atmospheric pressure, V2 is the volume of gas discharged by the airbag strip 202. Then, the length change of the airbag strip 202 is calculated by the gas volume formula, thereby calculating the moving distance of the object.

[0039] See also Figures 1 to 8 A reset switch 318 is fixedly installed on the inner wall of the moving cylinder 201 away from the installation box 1. The reset switch 318 is a touch switch in the prior art. A transmission line 319 is fixedly installed on the control end of the reset switch 318, and the other end of the transmission line 319 is fixedly installed on the side end of the processor 313, and the transmission line 319 passes through the inner wall of the moving cylinder 201. When the moving circle 205 in the moving cylinder 201 moves and the moving circle 205 contacts the reset switch 318, the reset switch 318 transmits the contact information to the processor 313. A pressure relief valve 316 is fixedly installed at the lower end of the pressure cylinder 310. The pressure relief valve 316 is an electric valve in the prior art, and a power line 317 is fixedly installed at the control end of the pressure relief valve 316, and the other end of the power line 317 is fixedly installed at the side end of the processor 313. When the reset switch 318 contacts the moving circle 205 and the air pressure in the pressure cylinder 310 is greater than the air pressure, the processor 313 controls the pressure relief valve 316 to open through the power line 317, and the excess air pressure in the pressure cylinder 310 is discharged from the pressure cylinder 310 by the pressure relief valve 316.

[0040] See also Figures 1 to 8 A control line 314 is fixedly installed at the control end of the control one-way valve 309, and the control line 314 passes through the inside of the moving frame 207, and the control line 314 is set to be an energized soft wire with a length twice that of the moving frame 207, so as to prevent the moving rod from pulling the control line 314 during movement and causing damage to the control line 314. A contact button 315 is fixedly installed at the other end of the control line 314. The above-mentioned contact button 315 is a prior art and will not be described in detail here. The contact button 315 is a contact switch in the prior art. When in contact, the switch is turned on, and when not in contact, the switch is turned off. The contact button 315 is fixedly installed at one end of the moving frame 207 away from the linkage block 208. When the object contacts the contact switch set on the moving frame 207, the contact switch is turned on to energize the control one-way valve 309.

[0041] The working principle of the present invention is as follows: when the linear sensor is used for detection, after the object moves and contacts the buffer pad 209, after the buffer pad 209 contacts, the object pushes the moving frame 207 to move, and the moving frame 207 pushes the moving circle 205 to start moving, so that the moving circle 205 starts to squeeze the airbag strip 202, the airbag strip 202 contracts, and the air pressure in the airbag strip 202 starts to increase. The change in the air pressure in the airbag strip 202 makes the detection transmission of the linear sensor faster;

[0042] The pneumatic telescopic rod 302 begins to extend, and the pneumatic telescopic rod 302 pushes the control telescopic rod 304 to start rotating, so that the pressure change in the airbag strip 202 controls the pneumatic telescopic rod 302 to work, thereby pushing the control telescopic rod 304 to rotate more responsively;

[0043] The controller 303 controls the air pressure pump 301 to start pumping air, so that the air pressure pump 301 pumps out the gas in the air bag strip 202, so that the air pressure in the air bag strip 202 is maintained within a suitable range, thereby preventing the air pressure in the air bag strip 202 from increasing and causing the moving frame 207 to encounter resistance;

[0044] When the air pump 301 starts to pump air, the air pump 301 pumps out the gas extracted from the airbag strip 202, transfers it to the three-way pipe 306 through the air inlet pipe 305, and then transfers it to the air transfer pipe 308 through the three-way pipe 306. When the gas enters the air cylinder 310, the air pressure in the air cylinder 310 begins to increase, and the one-way valve 309 is controlled so that the air pressure in the air cylinder 310 is no longer discharged, so that the air cylinder 310 transfers all the gas discharged from the airbag strip 202 to the air cylinder 310 for collection, so as to avoid incomplete gas collection.

[0045] At the same time, the air pressure detector 311 detects the pressure in the air pressure cylinder 310, and the air pressure detector 311 transmits the detection data to the processor 313 through the data line 312, so that the processor 313 calculates the distance moved by the airbag strip 202, so that the sensor will not be affected by the environment during use, and the detection data will be more accurate in harsh detection environments.

[0046] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A linear sensor closed-loop correction system, comprising a mounting box (1), characterized in that: The installation box (1) is provided with a detection mechanism (2) for detecting displacement using air pressure, the detection mechanism (2) comprising a moving cylinder (201), an airbag strip (202) being fixedly mounted on the moving cylinder (201) close to the inner wall of the installation box (1), and a control mechanism (3) for controlling the air pressure in the airbag strip (202) being provided at one end of the airbag strip (202); The inner wall of the moving cylinder (201) is provided with a slide groove (203), a slider (204) is slidably installed in the slide groove (203), a moving ring (205) is fixedly installed between the sliders (204), and the moving ring (205) is fixedly installed at one end of the airbag strip (202) away from the installation box (1), a fixing plate (210) is fixedly installed at one end of the installation box (1) close to the moving cylinder (201), and one end of the airbag strip (202) away from the moving ring (205) is fixedly installed on the side end of the fixing plate (210); The control mechanism (3) comprises an air pressure pump (301), and the output end of the air pressure pump (301) is fixedly mounted on an end of the air bag strip (202) away from the moving circle (205), a pneumatic telescopic rod (302) is fixedly mounted on the outer wall of the air bag strip (202) close to the air pressure pump (301), a controller (303) is fixedly mounted on the control end of the air pressure pump (301), a control telescopic rod (304) for controlling the air inlet and outlet of the air pressure pump (301) is rotatably mounted on the side end of the controller (303), and an end of the control telescopic rod (304) away from the controller (303) is rotatably connected to the side end of the pneumatic telescopic rod (302); An air intake pipe (305) is fixedly mounted on the input end of the air pressure pump (301); a three-way pipe (306) is fixedly mounted on one end of the air intake pipe (305) away from the air pressure pump (301); an air intake pipe (320) is fixedly mounted on one end of the three-way pipe (306) away from the air intake pipe (305); an air intake check valve (307) is fixedly mounted on one end of the air intake pipe (320) away from the three-way pipe (306); an air transfer pipe (308) is fixedly mounted on the lower end of the three-way pipe (306); and a control check valve (309) is fixedly mounted on one end of the air transfer pipe (308) away from the three-way pipe (306); A pressure cylinder (310) is fixedly mounted on the lower end of the control one-way valve (309), a pressure detector (311) is fixedly mounted on the upper end of the pressure cylinder (310), a data line (312) is fixedly mounted on the output end of the pressure detector (311), and a processor (313) is fixedly mounted on the end of the data line (312) away from the control valve.

2. A linear sensor closed-loop correction system according to claim 1, characterized in that: The upper and lower ends of the movable cylinder (201) are provided with sliding grooves (206), the inner walls of the sliding grooves (206) are both slidably mounted with movable frames (207), and a linkage block (208) is fixedly mounted between the movable frame (207) and the movable ring (205).

3. The linear sensor closed loop correction system according to claim 1, characterized in that: A reset switch (318) is fixedly mounted on the inner wall of the movable cylinder (201) away from the installation box (1); a transmission line (319) is fixedly mounted on the control end of the reset switch (318), and the other end of the transmission line (319) is fixedly mounted on the side end of the processor (313); a pressure relief valve (316) is fixedly mounted on the lower end of the air pressure cylinder (310), and a power-on line (317) is fixedly mounted on the control end of the pressure relief valve (316), and the other end of the power-on line (317) is fixedly mounted on the side end of the processor (313).

4. The linear sensor closed loop correction system according to claim 1, characterized in that: A control line (314) is fixedly mounted on the control end of the control check valve (309), a contact button (315) is fixedly mounted on the other end of the control line (314), and the contact button (315) is fixedly mounted on one end of the mobile frame (207) away from the linkage block (208).

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