A composite gauge for multi-size synchronous detection

Abstract

The utility model discloses a kind of composite gauges of multi-size synchronous detection, including base unit, measuring unit and control unit.Base unit adopts platform type structure, including granite reference platform and positioning module.Measuring unit is installed on the top of base unit by guide rail, including multiple groups of measuring head, displacement sensor and adjusting support.Control unit is set to the side portion of base unit, including data acquisition module, processing chip and display screen.In detection process, the part to be measured is placed on reference platform, positioning module adjusts fixed position, measuring head moves to preset measurement point along guide rail, displacement sensor real-time acquisition size data and transmission to processing chip for analysis, and display screen shows detection result.

Description

Technical Field

[0001] This utility model relates to the field of measurement and testing technology, and in particular to a composite gauge for simultaneous multi-size testing. Background Technology

[0002] In the current mechanical manufacturing field, inspection fixtures are widely used for the dimensional inspection of parts. Traditional inspection fixtures are typically designed for parts of a single specification and cannot meet the inspection needs of products with multiple sizes. Existing technologies require frequent changes of dedicated inspection fixtures to inspect parts of different specifications, resulting in low inspection efficiency and complex operating procedures. Conventional inspection fixtures suffer from inconsistent positioning benchmarks during measurement, affecting the accuracy of inspection results. Furthermore, traditional inspection fixtures have fixed structures and lack necessary adjustment mechanisms, making it difficult to achieve rapid conversion and accurate measurement. Data recording relies on manual operation, which is prone to recording errors and hinders quality traceability. Therefore, it is necessary to develop a composite inspection fixture for simultaneous multi-size inspection to solve the problems of low inspection efficiency and poor adaptability in existing technologies. Utility Model Content

[0003] The purpose of this utility model is to provide a composite gauge for simultaneous multi-size detection, which solves the problems mentioned in the background art.

[0004] This invention is achieved through a composite gauge for simultaneous multi-size detection.

[0005] The system comprises a base unit, a measuring unit, and a control unit. The base unit has a platform structure. The measuring unit is mounted above the base unit via guide rails. The control unit is located on the side of the base unit. The base unit includes a reference platform and a positioning module. The reference platform is made of granite. The positioning module is mounted to the edge of the reference platform via a sliding groove. The measuring unit includes multiple measuring heads, displacement sensors, and an adjustment bracket. The multiple measuring heads are mounted to the end of the adjustment bracket via a rotating shaft. The displacement sensors are embedded inside the measuring heads. The adjustment bracket is connected to the guide rail via a slider. The control unit includes a data acquisition module, a processing chip, and a display screen. The data acquisition module is connected to the displacement sensors via signal lines. The processing chip is soldered to the control unit circuit board. The display screen is embedded in the side wall of the base unit.

[0006] During the inspection, the part to be tested is placed on a reference platform, and the positioning module adjusts and fixes its position according to the part's dimensions. Multiple measuring heads move along the guide rail to the preset measuring points under the action of the adjusting bracket. Displacement sensors collect dimensional data of various parts of the part in real time. The data acquisition module transmits the measurement signals to the processing chip for calculation and analysis. The display screen shows the inspection results and deviation information in real time.

[0007] As a further improvement, the positioning module features an adaptive clamping structure. This structure includes a clamping block, a pressure sensor, and a drive cylinder. The clamping block is mounted to the main body of the positioning module via guide posts. The pressure sensor is attached to the working surface of the clamping block. The drive cylinder is fixed inside the positioning module. The clamping block is made of hard alloy material, and its working surface has anti-slip textures. The pressure sensor uses a thin-film pressure sensor with a measurement range of zero Newtons to two hundred Newtons. The drive cylinder is connected to an external air source via an air pipe. The adaptive clamping structure adjusts the clamping force based on the feedback signal from the pressure sensor, ensuring the parts are firmly fixed and do not deform.

[0008] As a further improvement, the measuring head is equipped with a quick-change mechanism. This mechanism includes a conversion disc, locking pins, and positioning slots. The conversion disc is mounted to the end of the adjusting bracket via bearings. The locking pins are spring-loaded on the side of the conversion disc. Positioning slots are distributed in a ring around the perimeter of the conversion disc. The conversion disc has six mounting positions, each capable of mounting measuring heads of different sizes. The locking pins cooperate with the positioning slots to achieve precise positioning of the measuring head at each position. The quick-change mechanism allows for rapid switching between different measuring heads by rotating the conversion disc, adapting to multi-size inspection needs.

[0009] As a further improvement, the adjustment bracket is equipped with a fine-tuning device. This device includes a differential head, a lead screw, and guide rails. The differential head is fixed to the adjustment slider via the bracket. The lead screw connects the differential head to the measuring head mounting base. Guide rails are arranged parallel to each other on both sides of the adjustment bracket. The differential head employs a precision thread structure with a minimum reading of 0.01 millimeters. The lead screw is a ball screw pair with a lead of one millimeter. The fine-tuning device achieves precise adjustment of the measuring head position by rotating the differential head to drive the lead screw.

[0010] As a further improvement, the control unit is equipped with a data storage system. The data storage system includes a storage chip, a data interface, and a memory card slot. The storage chip is soldered to the side of the processing chip. The data interface uses a USB-C interface. The memory card slot is located on the side of the control unit. The storage chip uses FLASH memory with a capacity of 64GB. The data storage system enables real-time saving and export of detection data, and supports historical data retrieval and quality traceability.

[0011] As a further improvement, the base unit is equipped with a leveling mechanism. The leveling mechanism includes adjusting feet, a level, and a locking nut. The adjusting feet are threaded to the bottom of the reference platform. The level is embedded in the surface of the reference platform. The locking nut is located on the upper part of the adjusting feet. The adjusting feet are made of stainless steel and have an adjustment range of ±5 mm. The level is an electronic level with a measurement accuracy of 0.02 degrees per meter. The leveling mechanism ensures the reference platform is level by adjusting the height of the adjusting feet.

[0012] As a further improvement, the measuring unit is equipped with a temperature compensation module. The temperature compensation module includes a temperature sensor, a compensation circuit, and a heat sink. The temperature sensor is installed inside the measuring head. The compensation circuit is integrated into the processing chip. The heat sink is attached to the control unit housing. The temperature sensor is a platinum resistance sensor with a measurement range of 0 to 80 degrees Celsius. The compensation circuit automatically corrects the measurement data according to temperature changes, eliminating the influence of thermal deformation on detection accuracy.

[0013] In summary, this novel composite gauge for simultaneous multi-size inspection achieves efficient and accurate inspection of parts of various specifications through modular measurement design and an intelligent control system. Its adaptive clamping structure and rapid conversion mechanism significantly improve the adaptability and ease of operation of the equipment, while the fine-tuning device and temperature compensation module further optimize inspection accuracy and stability, effectively solving the technical problems of low inspection efficiency and poor adaptability of traditional gauges. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the measuring unit in this utility model;

[0016] Figure 3 This is a partially enlarged schematic diagram of the present invention.

[0017] Explanation of reference numerals in the attached figures:

[0018] 1. Base unit; 2. Measuring unit; 3. Control unit; 4. Reference platform; 5. Positioning module; 6. Measuring head; 7. Displacement sensor; 8. Adjusting bracket; 9. Data acquisition module; 10. Processing chip; 11. Display screen; 12. Clamping block; 13. Pressure sensor; 14. Drive cylinder; 15. Converter disc; 16. Locking pin; 17. Positioning groove; 18. Micrometer head; 19. Transmission screw; 20. Guide rail; 21. Storage chip; 22. Data interface; 23. Memory card slot; 24. Adjustable feet; 25. Level; 26. Locking nut; 27. Temperature sensor; 28. Compensation circuit; 29. ​​Heat sink. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0020] Example 1

[0021] Please see Figures 1 to 3 This utility model provides a composite gauge for simultaneous multi-size inspection, the overall structure of which mainly includes a base unit 1, a measuring unit 2, and a control unit 3. The base unit 1 serves as a stable support platform and positioning reference for the entire composite gauge, the measuring unit 2 is responsible for collecting dimensional data of the part to be measured, and the control unit 3 manages the measurement process, processes the data, and displays the results.

[0022] Specifically, the base unit 1 adopts a platform structure, and its main body consists of a reference platform 4 and a positioning module 5. The overall dimensions of the base unit 1 are typically between 800 mm and 1500 mm in length, between 600 mm and 1200 mm in width, and between 150 mm and 300 mm in height, designed to provide a spacious and stable working surface.

[0023] The reference platform 4 is made of granite, with its main body manufactured from high-quality black granite (such as Jinan Green or Tai'an Green) through precision cutting, grinding, and polishing processes. It possesses extremely high flatness (typically better than two micrometers per square meter), a low coefficient of thermal expansion, high hardness, and good vibration resistance. The typical dimensions of the reference platform 4 are approximately 800 to 1500 mm in length, 600 to 1200 mm in width, and 150 to 300 mm in thickness. The surface finish of the reference platform 4 can reach below Ra 0.02 micrometers. As the physical reference surface for placing and measuring the part under test, the high flatness of the reference platform 4 ensures the accuracy and repeatability of the measurement results. The bottom of the reference platform 4 is typically equipped with several vibration damping and leveling mechanisms (such as rubber damping pads or air-bearing damping feet, not shown) to further isolate the influence of external vibrations on measurement stability.

[0024] The positioning module 5 is mounted on the edge of the reference platform 4 via a sliding groove. The main body of the positioning module 5 is precision-machined from high-strength aluminum alloy or hardened tool steel, and its dimensions are typically approximately 100-300 mm in length, 50-100 mm in width, and 80-150 mm in height. The sliding groove is a dovetail or T-shaped groove structure, precision-machined on the edge of the reference platform 4, extending along the length of the platform. Its inner width precisely matches the bottom guide block of the positioning module 5, allowing the positioning module 5 to slide smoothly along the groove and be fixed at any position using locking bolts (not shown). The positioning module 5 is used for rapid and repeatable positioning and fixing of the part to be measured, ensuring the stability of the part's position during measurement. The design of the positioning module 5 considers compatibility with parts of different sizes, and it has an adjustable clamping or support mechanism inside.

[0025] The measuring unit 2 is mounted above the base unit 1 via a guide rail. The measuring unit 2 is the core system in the composite fixture used to realize multi-point, multi-dimensional dimensional measurement, and it includes multiple sets of measuring heads 6, displacement sensors 7, and adjustment brackets 8.

[0026] The multiple measuring heads 6 are made of high-strength stainless steel or ceramic materials. Their external shape and contact point design are optimized according to different measurement requirements (e.g., inner diameter, outer diameter, height, depth), such as spherical probes, flat-head probes, or knife-edge probes. The multiple measuring heads 6 are mounted to the end of the adjusting bracket 8 via a rotating shaft. The rotating shaft is made of hardened stainless steel, with a diameter of approximately eight to twelve millimeters, and is connected by precision bearings (e.g., miniature ball bearings) to ensure smooth and wobbly rotation of the measuring heads 6. The mounting method of the multiple measuring heads 6 allows for rotational adjustment within a certain angle range to adapt to different measurement locations of the parts to be measured. The ends of the measuring heads 6 (i.e., the parts in contact with the parts) are typically made of wear-resistant ruby ​​balls or hard alloy materials.

[0027] The displacement sensor 7 is embedded inside the measuring head 6. The displacement sensor 7 is a high-precision contact or non-contact displacement sensor, such as an LVDT (Linear Variable Differential Transformer) sensor, a capacitive sensor, or a laser displacement sensor. Its measurement range is typically ±5 mm to ±20 mm, with a measurement accuracy of 0.5 micrometers to 2 micrometers and a resolution of 0.1 micrometers. The displacement sensor 7 is securely embedded inside the measuring head 6 using a precise miniature fixing structure (e.g., threaded or adhesive fixing), with its measuring rod or laser emitting / receiving end extending to the contact point of the measuring head 6. The displacement sensor 7 collects dimensional data of various parts of the part under test in real time and converts it into analog or digital electrical signals.

[0028] The adjusting bracket 8 is connected to the guide rail via a slider. The main body of the adjusting bracket 8 is made of lightweight, high-strength aluminum alloy profile (e.g., grade 6061 or 7075) or precision cast iron. Its main body has a U-shaped or box-shaped cross-section, with a length of approximately 400-800 mm, a width of approximately 50-80 mm, and a height of approximately 80-120 mm, exhibiting good rigidity and stability. The guide rail is a high-precision linear guide, such as a ball bearing linear guide or an air-bearing guide, with a length of approximately 500-1000 mm. It is installed above the base unit 1, parallel to the surface of the reference platform 4. The slider is made of wear-resistant alloy steel or engineering plastic, and integrates precision ball bearings or air-bearing bearings internally. It precisely matches the guide rail, enabling the adjusting bracket 8 to move with high precision and low friction along the length of the guide rail. Through its movement capability, the adjusting bracket 8 can accurately move the multiple sets of measuring heads 6 to various preset measuring points on the part to be measured.

[0029] The control unit 3 is located on the side of the base unit 1. The control unit 3 is the core control unit and human-machine interface of the entire composite fixture. Its overall dimensions are typically approximately 200-300 mm in length, 150-200 mm in width, and 50-80 mm in height. The control unit 3 includes a data acquisition module 9, a processing chip 10, and a display screen 11. The outer casing of the control unit 3 is made of industrial-grade aluminum alloy or high-strength engineering plastic, and its surface is anodized or powder-coated, providing dustproof, moisture-proof, and electromagnetic interference-resistant capabilities.

[0030] The data acquisition module 9 employs a high-performance multi-channel synchronous analog-to-digital converter (ADC) module with a sampling rate of 100,000 to 500,000 times per second and a resolution of 16 to 24 bits. The data acquisition module 9 is connected to the displacement sensor 7 via shielded signal lines. These signal lines utilize low-noise, interference-resistant coaxial cables or twisted-pair cables to ensure the integrity and accuracy of the measurement signal transmission. The data acquisition module 9 performs real-time acquisition, filtering, and digitization processing on the analog or digital signals from the displacement sensor 7, and transmits the processed raw data to the processing chip 10.

[0031] The processing chip 10 employs a high-performance embedded processor (such as an ARM Cortex-M series or Cortex-A series processor), with a main frequency reaching 300 MHz to 1.5 GHz, possessing powerful data processing and floating-point arithmetic capabilities. The processing chip 10 is soldered onto the circuit board of the control unit 3 via SMT (Surface Mount Technology). The circuit board employs a multi-layer PCB design to ensure signal integrity and anti-interference capabilities. The processing chip 10 receives measurement data from the data acquisition module 9 and performs high-speed calculations and analyses based on preset detection algorithms, dimensional standards, and tolerance requirements, such as dimensional deviation calculations, tolerance judgments, and conformity assessments.

[0032] The display screen 11 uses an industrial-grade TFT LCD or OLED touchscreen, typically ranging from seven to ten inches in size, with a resolution of 800 x 480 pixels to 1280 x 800 pixels. The display screen 11 is mounted in pre-drilled holes in the side wall of the base unit 1 using screws and sealing gaskets, and its surface is covered with high-strength scratch-resistant glass or an acrylic panel. The display screen 11 is used to display real-time test results (e.g., actual dimensions, deviation values, pass / fail status), tolerance zones, historical data, and system operating status, while also serving as a user input interface for human-machine interaction.

[0033] During the testing process, the operator first places the part to be tested in the designated area of ​​the reference platform 4. The positioning module 5 adjusts the fixed position of the part to be tested manually or automatically (e.g., by using a clamping mechanism) according to the size and shape of the part, ensuring that the part's position is stable and has a uniform positioning reference throughout the measurement process. Subsequently, the adjustment bracket 8 of the measuring unit 2 moves along the guide rail above the base unit 1 under the drive of an internal drive mechanism (not shown, such as a lead screw or synchronous belt driven by a stepper motor), precisely positioning the multiple sets of measuring heads 6 to various preset measuring points on the part to be tested. Once the measuring head 6 contacts the part or is within the non-contact measuring distance, the displacement sensor 7 collects the dimensional data of various parts of the part in real time and converts it into electrical signals. The data acquisition module 9 receives these measurement signals, performs high-speed, high-precision digital processing, and transmits the processed data to the processing chip 10. The processing chip 10 calculates and analyzes the received dimensional data according to the preset testing program and tolerance standards, determines whether the dimensions of the part to be tested meet the requirements, and calculates the deviation information. The display screen 11 displays these test results and deviation information in real time, for example, through numerical values, charts or color codes (e.g., green indicates qualified and red indicates out of tolerance), to intuitively display the test results, making it easy for operators to quickly judge the quality status of the parts.

[0034] Example 2

[0035] In another embodiment of this utility model, the positioning module 5 is provided with an adaptive clamping structure to ensure that the part is firmly fixed and does not deform. Its structure is basically the same as that in Embodiment 1, and will not be described again here. Specifically, the adaptive clamping structure includes a clamping block 12, a pressure sensing plate 13, and a driving cylinder 14. The clamping block 12 is made of cemented carbide material, and its main body is manufactured by precision cutting and grinding of high wear-resistant and high-hardness tungsten carbide-based cemented carbide, such as YG8 or YG15 grades. The clamping block 12 is in the shape of an irregular block or a V-shaped block, with typical dimensions of about 50 mm to 80 mm in length, about 20 mm to 40 mm in width, and about 30 mm to 50 mm in height. The working surface of the clamping block 12 is provided with anti-slip texture, which is a fine grid or parallel rib pattern, formed by laser etching or wire cutting process, effectively increasing the friction when in contact with the part to be measured and preventing the part from sliding. The clamping block 12 is mounted on the main body of the positioning module 5 via several precision guide posts. These guide posts are made of hardened tool steel and have a diameter of approximately 10 to 15 millimeters, ensuring the straightness and stability of the clamping block 12 during clamping motion. The pressure sensing plate 13 is a thin-film pressure sensor with dimensions of approximately 20 to 30 millimeters x 30 millimeters and a thickness of approximately 0.5 to 1.0 millimeters. Its measurement range is 0 to 200 Newtons, and its measurement accuracy is ±5 Newtons. The pressure sensing plate 13 is attached to the working surface of the clamping block 12 using high-performance thermally conductive adhesive or double-sided tape, ensuring direct contact with the part to be measured, for real-time monitoring of the actual clamping force of the clamping block 12 on the part. The drive cylinder 14 is a miniature double-acting or single-acting cylinder with a cylinder body made of aerospace aluminum alloy and a piston rod made of stainless steel. Its stroke is approximately 20 to 40 millimeters, and its maximum output force is approximately 300 to 500 Newtons. The drive cylinder 14 is fixed inside the positioning module 5, and its piston rod is connected to the clamping block 12 via a linkage mechanism (not shown), driving the clamping block 12 to clamp and release. The drive cylinder 14 is connected to an external air source (e.g., a small air compressor or air cylinder, not shown) via an air pipe, and its air pressure is precisely controlled by an electromagnetic proportional valve (not shown). During the testing process, the intelligent control unit 4 (not shown, integrated with the processing chip 10 in the control unit 3) dynamically adjusts the air pressure of the drive cylinder 14 based on the real-time clamping force signal fed back by the pressure sensor 13, thereby precisely controlling the clamping force of the clamping block 12. The adaptive clamping structure ensures that the part under test is firmly and reliably fixed while avoiding plastic deformation or surface damage caused by excessive clamping force, thus guaranteeing the accuracy of the test results and the integrity of the part.

[0036] Example 3

[0037] In another embodiment of this utility model, the measuring head 6 is provided with a quick conversion mechanism to adapt to multi-size detection requirements. Its structure is basically the same as in Embodiment 1, and will not be described again here. Specifically, the quick conversion mechanism includes a conversion disc 15, a locking pin 16, and several positioning slots 17. The conversion disc 15 is manufactured from high-strength aluminum alloy or hardened alloy steel through precision machining, with a diameter of approximately 80 mm to 120 mm and a thickness of approximately 20 mm to 30 mm. The conversion disc 15 is mounted to the end of the adjusting bracket 8 via precision bearings (e.g., crossed roller bearings), which ensure smooth rotation and high rotational accuracy of the conversion disc 15. The periphery of the conversion disc 15 has six equidistantly distributed mounting positions, each with a standard mounting hole and positioning pin hole, which can be used to install measuring heads 6 of different specifications and types. The locking pin 16 is made of hardened stainless steel and has a diameter of approximately 8 mm to 10 mm. The locking pin 16 is mounted on the side of the conversion disc 15 via a spring (not shown) and connected to a small cylinder or electromagnet (not shown), allowing it to extend and retract under pneumatic or electromagnetic force. The tip of the locking pin 16 is conical or spherical. The positioning grooves 17 are V-shaped or U-shaped, distributed in a ring around the periphery of the conversion disc 15, with their number corresponding to the number of installation positions. The shape and size of the positioning grooves 17 precisely match the tip of the locking pin 16 to achieve precise positioning of the measuring head 6. When inspecting parts of different sizes or types, the operator or the intelligent control unit 4 (not shown) drives the small cylinder or electromagnet to disengage the locking pin 16 from the positioning groove 17, then rotates the conversion disc 15 to the desired measuring head 6 position. After the locking pin 16 re-inserts into the corresponding positioning groove 17, the switching of the measuring head 6 is completed. The quick-change mechanism enables rapid switching between different measuring heads 6 by rotating the conversion disk 15, avoiding the time-consuming and repetitive positioning errors caused by manually changing measuring heads in traditional inspection fixtures, thereby significantly improving the inspection efficiency and adaptability of composite inspection fixtures for multi-size parts.

[0038] Example 4

[0039] In another embodiment of this utility model, the adjusting bracket 8 is equipped with a fine-tuning device for precise adjustment of the measuring head position. Its structure is basically the same as in Embodiment 1, and will not be described again here. Specifically, the fine-tuning device includes a micrometer head 18, a transmission screw 19, and several guide rails 20. The micrometer head 18 adopts a precision thread structure, its main body is made of high-precision stainless steel or brass, and it is equipped with a precision scale and vernier on the outside. The micrometer head 18 is fixed to the adjusting slider (not shown) of the adjusting bracket 8 by a special bracket (made of aluminum alloy or stainless steel). The minimum reading value of the micrometer head 18 can reach 0.01 mm or even 0.001 mm, and its internal precision thread pair (e.g., a pitch of 0.5 mm) ensures the accuracy of the fine-tuning. The transmission screw 19 adopts a precision ball screw pair, its main body is made of high-strength alloy steel, its diameter is approximately 10 mm to 15 mm, and its lead is 1 mm to 5 mm. One end of the transmission screw 19 is connected to the rotating shaft of the micrometer head 18, and the other end is connected to the mounting base (not shown) of the measuring head 6 via a precision coupling. The mounting base can move linearly along a guide rail or linear bearing. The guide rail 20 is a high-precision linear guide, such as a V-groove guide rail or a linear ball bearing guide rail, and its length matches the length of the adjusting bracket 8. The guide rail 20 is arranged parallel to both sides of the adjusting bracket 8 and precisely cooperates with the guide block (not shown) of the mounting base of the measuring head 6 to guide the linear movement of the mounting base of the measuring head 6, ensuring its high straightness during fine adjustment. During the testing process, when it is necessary to finely adjust the position of the measuring head 6 to reach the precise measurement point of the part to be tested, the operator or the intelligent control unit 4 (not shown) rotates the micrometer head 18. The rotation of the micrometer head 18 drives the transmission screw 19 to rotate via its internal precision threaded pair. The rotation of the transmission screw 19 then converts the rotational motion into linear motion via a ball screw pair, thereby driving the measuring head 6 mounting base connected to the transmission screw 19 to perform precise linear motion along the guide rail 20. The fine-tuning device is designed to achieve precise adjustment of the position of the measuring head 6 by rotating the micrometer head 18 to drive the transmission screw 19. Its minimum adjustment step reaches the micrometer level, which greatly improves the accuracy of the measuring head 6 in aligning with the measuring point and ensures high precision and high repeatability of dimensional inspection.

[0040] Example 5

[0041] In another embodiment of this utility model, the control unit 3 is equipped with a data storage system for managing the detection data. Its structure is basically the same as in Embodiment 1, and will not be described again here. Specifically, the data storage system includes a storage chip 21, a data interface 22, and a memory card slot 23. The storage chip 21 uses a high-speed FLASH memory (e.g., eMMC or NAND Flash), with a storage capacity typically ranging from 64GB to 128GB. The storage chip 21 is soldered to the side of the processing chip 10 via SMT (Surface Mount Technology) and interacts with the processing chip 10 via a high-speed parallel or serial interface (e.g., SPI or SDIO). The storage chip 21 is used to save in real time all raw dimensional data generated during the detection process, processed detection results, deviation information, tolerance judgment results, detection time, operator information, and part batch numbers, ensuring data integrity and traceability. The data interface 22 uses a standard USB-C interface with a transmission rate of 5 gigabits per second to 10 gigabits per second. The data interface 22 is located on the side or front panel of the control unit 3 and is connected to the processing chip 10 via internal wires. It is used to connect to external storage devices (e.g., USB flash drives, external hard drives) or computers to enable rapid export of test data. The storage card slot 23 is a standard microSD card slot or SD card slot, supporting hot-swapping. Located on the side of the control unit 3 and connected to the processing chip 10 via an internal bus, the storage card slot 23 is used to insert an external storage card (e.g., a microSD card or SD card), providing additional expandable storage space and data backup functionality. The data storage system enables real-time saving of test data via the storage chip 21, rapid data export via the data interface 22, and expandable storage via the storage card slot 23. This allows for efficient management of massive amounts of test data, supports historical data querying, quality traceability, and statistical analysis, significantly enhancing the data management capabilities and application value of the composite inspection fixture.

[0042] Example 6

[0043] In another embodiment of this utility model, the base unit 1 is provided with a leveling mechanism to ensure that the reference platform is in a level state. Its structure is basically the same as that in Embodiment 1, and will not be described again here. Specifically, the leveling mechanism includes several adjusting feet 24, a level 25, and several locking nuts 26. The adjusting feet 24 are made of high-strength stainless steel, and their main body is threaded rod-shaped with anti-slip rubber pads or hard alloy pads at the bottom. The diameter is about 30 mm to 50 mm, and the length is about 100 mm to 150 mm. The adjusting feet 24 are installed on the bottom edge of the reference platform 4 by threaded connection, and are evenly distributed. The thread precision is precision grade to ensure smooth adjustment. The adjustment height range of the adjusting feet 24 is ±5 mm to ±10 mm, so that the reference platform 4 can be finely leveled. The level 25 is a high-precision electronic level, with a size of about 50 mm x 50 mm to 80 mm x 80 mm, and a resolution of 0.001 degrees. The level 25 is embedded in the center of the surface of the reference platform 4, with its display screen flush with the platform surface. It displays the current tilt angle of the reference platform 4 in real time, with a measurement accuracy of 0.02 degrees per meter. The locking nut 26 is made of high-strength stainless steel and has a hexagonal or circular knurled structure. Its internal thread matches the thread of the adjusting foot 24. The locking nut 26 is located on the upper part of the adjusting foot 24, adjacent to the bottom of the reference platform 4. After the height of the adjusting foot 24 is adjusted to meet the level requirements, tightening the locking nut 26 axially locks the adjusting foot 24, preventing it from loosening or rotating. This provides reliable locking after setting the height, ensuring the long-term horizontal stability of the reference platform 4. The function of this leveling mechanism is to precisely adjust the reference platform 4 to the ideal level by adjusting the height of the adjusting foot 24, combined with the real-time display of the level 25. This eliminates measurement errors caused by platform tilt, ensuring the accuracy and consistency of the test results, which is especially crucial for high-precision dimensional measurements.

[0044] Example 7

[0045] In another embodiment of this utility model, the measuring unit 2 is provided with a temperature compensation module to eliminate the influence of thermal deformation on the detection accuracy. Its structure is basically the same as in Embodiment 1, and will not be described again here. Specifically, the temperature compensation module includes a temperature sensor 27, a compensation circuit 28, and a heat sink 29. The temperature sensor 27 is a high-precision platinum resistance sensor (e.g., PT100 or PT1000), with dimensions of approximately 5 mm x 5 mm and a thickness of approximately 2 mm. The temperature sensor 27 is installed inside the measuring head 6, close to the displacement sensor 7, or tightly attached to the inner side of the outer shell of the measuring head 6, for real-time monitoring of the temperature of the measuring head 6 and its surrounding environment. Its measurement range is from 0 degrees Celsius to 80 degrees Celsius, and its measurement accuracy is 0.1 degrees Celsius. The compensation circuit 28 is integrated inside the processing chip 10 and implemented through firmware. The compensation circuit 28 receives real-time temperature data from the temperature sensor 27 and, in conjunction with a pre-established model of the thermal expansion coefficient of the measuring head material, the thermal drift characteristics of the displacement sensor, and the thermal expansion coefficient of the material of the part under test, automatically corrects the original dimensional data collected by the displacement sensor 7. The heat sink 29 is made of aluminum alloy or copper, and is finned or mesh-like, with dimensions ranging from approximately 50 mm x 50 mm to 80 mm x 80 mm. The heat sink 29 is attached to the housing of the control unit 3 (especially the area where the processing chip 10 is located) using thermally conductive adhesive or screws to assist in heat dissipation of the processing chip 10 and related electronic components, ensuring their operation at a stable temperature, thereby guaranteeing the calculation accuracy of the compensation circuit 28 and the long-term stability of the entire control unit 3. During the detection process, when the ambient temperature or the device itself generates heat, causing slight thermal deformation of the measuring head 6 and the part under test, the temperature sensor 27 detects these temperature changes in real time. Based on this temperature data, the compensation circuit 28 uses an internal compensation algorithm to automatically correct dimensional measurement errors caused by thermal deformation, such as compensating for changes in the length of the measuring head 6 or estimating the actual dimensions of the part under test. The temperature compensation module is designed to monitor temperature changes in real time via temperature sensor 27 and automatically correct measurement data via compensation circuit 28, effectively eliminating the impact of thermal deformation on detection accuracy. This ensures the high-precision and high-stability dimensional measurement capability of the composite gauge under different ambient temperature conditions, which is especially crucial for the detection of high-precision parts.

[0046] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A composite gauge for simultaneous multi-size inspection, comprising: The base unit (1), measuring unit (2), and control unit (3) are configured. The measuring unit (2) is mounted above the base unit (1) via a guide rail. The control unit (3) is located on the side of the base unit (1). The base unit (1) includes a reference platform (4) and a positioning module (5). The reference platform (4) is made of granite. The positioning module (5) is mounted on the edge of the reference platform (4) via a sliding groove. The measuring unit (2) includes multiple measuring heads (6), a displacement sensor (7), and an adjusting bracket (8). The multiple measuring heads (6) are mounted on the end of the adjusting bracket (8) via a rotating shaft. The displacement sensor (7) is embedded inside the measuring head (6). The adjusting bracket (8) is mounted on the end of the adjusting bracket (8) via a rotating shaft. 8) The guide rail is connected via a slider; the control unit (3) includes a data acquisition module (9), a processing chip (10), and a display screen (11); the data acquisition module (9) is connected to the displacement sensor (7) via a signal line; the processing chip (10) is soldered to the circuit board of the control unit (3); the display screen (11) is embedded in the side wall of the base unit (1); the positioning module (5) is provided with an adaptive clamping structure; the adaptive clamping structure includes a clamping block (12), a pressure sensing plate (13), and a driving cylinder (14); the clamping block (12) is installed on the main body of the positioning module (5) via a guide post; the pressure sensing plate (13) is attached to the working surface of the clamping block (12); the driving cylinder (14) is fixed. Inside the positioning module (5); the clamping block (12) is made of hard alloy material, and its working surface is provided with anti-slip texture; the pressure sensing plate (13) is a thin film pressure sensor, and its measurement range is from zero Newton to two hundred Newtons; the driving cylinder (14) is connected to an external air source through an air pipe; the measuring head (6) is provided with a quick conversion mechanism; the quick conversion mechanism includes a conversion plate (15), a locking pin (16) and a positioning groove (17); the conversion plate (15) is mounted on the end of the adjusting bracket (8) through a bearing; the locking pin (16) is set on the side of the conversion plate (15) through a spring; the positioning groove (17) is distributed in a ring around the periphery of the conversion plate (15); the conversion plate (15) is provided with six installation positions; The locking pin (16) cooperates with the positioning groove (17) to achieve precise positioning of the measuring head (6) station; the adjusting bracket (8) is equipped with a fine-tuning device; the fine-tuning device includes a micrometer head (18), a transmission screw (19) and a guide rail (20); the micrometer head (18) is fixed to the adjusting slider of the adjusting bracket (8) by the bracket; the transmission screw (19) connects the micrometer head (18) and the measuring head (6) mounting base; the guide rail (20) is arranged parallel to both sides of the adjusting bracket (8); the micrometer head (18) adopts a precision thread structure, and its minimum reading value is 0.01 mm; the transmission screw (19) adopts a ball screw pair, and its lead is 1 mm; the control unit (3) is equipped with a data storage system;The data storage system includes a storage chip (21), a data interface (22), and a memory card slot (23); the storage chip (21) is soldered to the side of the processing chip (10); the data interface (22) adopts a USB-type C interface; the memory card slot (23) is located on the side of the control unit (3); the storage chip (21) adopts a FLASH memory with a capacity of 64 GB; the base unit (1) is provided with a horizontal adjustment mechanism; the horizontal adjustment mechanism includes an adjusting foot (24), a level (25), and a locking nut (26); the adjusting foot (24) is installed on the bottom of the reference platform (4) by a threaded connection; the level (25) is embedded in the surface of the reference platform (4); the locking nut (26) is installed on the surface of the reference platform (4); the level (25) is installed on the surface of the reference platform (4); the level (26) is installed on the bottom of the reference platform (4). A tightening nut (26) is located on the upper part of the adjusting foot (24); the adjusting foot (24) is made of stainless steel and its adjustment height range is ±5 mm; the level (25) is an electronic level with a measurement accuracy of 0.02 degrees per meter; the measuring unit (2) is equipped with a temperature compensation module; the temperature compensation module includes a temperature sensor (27), a compensation circuit (28), and a heat sink (29); the temperature sensor (27) is installed inside the measuring head (6); the compensation circuit (28) is integrated into the processing chip (10); the heat sink (29) is attached to the housing of the control unit (3); the temperature sensor (27) is a platinum resistance sensor with a measurement range of 0 degrees Celsius to 80 degrees Celsius.

2. The composite gauge for simultaneous multi-size inspection according to claim 1, characterized in that, The clamping block (12) of the adaptive clamping structure is in the shape of an irregular block or a V-shaped block; the pressure sensing plate (13) is attached to the working surface of the clamping block (12) by high-performance thermally conductive adhesive; the driving cylinder (14) is a miniature double-acting or single-acting cylinder with a stroke of 20 mm to 40 mm and a maximum output force of 300 N to 500 N.

3. The composite gauge for simultaneous multi-size inspection according to claim 1, characterized in that, The conversion disc (15) of the quick conversion mechanism has a diameter of 80 mm to 120 mm and a thickness of 20 mm to 30 mm; the locking pin (16) has a diameter of 8 mm to 10 mm and its tip is conical or spherical; the positioning groove (17) has a V-shaped or U-shaped structure.

4. The composite gauge for simultaneous multi-size inspection according to claim 1, characterized in that, The micrometer head (18) of the fine-tuning device drives the transmission screw (19) to rotate through a precision threaded pair; the transmission screw (19) converts the rotational motion into linear motion through a ball screw pair; the guide rail (20) is a V-groove guide rail or a linear ball bearing guide rail.

5. The composite gauge for simultaneous multi-size inspection according to claim 1, characterized in that, The storage chip (21) of the data storage system interacts with the processing chip (10) through a high-speed parallel or serial interface; the data interface (22) has a transmission rate of five gigabits per second to ten gigabits per second; the storage card slot (23) is a microSD card slot or an SD card slot.

6. The composite gauge for simultaneous multi-size inspection according to claim 1, characterized in that, The bottom of the adjusting feet (24) of the leveling mechanism is provided with anti-slip rubber pads or hard alloy pads; the display screen of the level (25) is flush with the surface of the reference platform (4); the locking nut (26) has a hexagonal or circular knurled structure.

7. The composite gauge for simultaneous multi-size inspection according to claim 1, characterized in that, The temperature sensor (27) of the temperature compensation module has a measurement accuracy of 0.1 degrees Celsius; the compensation circuit (28) is integrated into the processing chip (10) through firmware program; the heat sink (29) is made of aluminum alloy or copper material and is in the form of fins or mesh.

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