Zero-pressure type sideslip angle sensor calibration tool

Abstract

The invention discloses a zero-pressure type sideslip angle sensor calibration tool. The zero-pressure type sideslip angle sensor calibration tool comprises an angle protractor and a connecting rod, the angle graduator comprises a main shaft, a graduated plate and a base, a first through hole and a second through hole are formed in the central axis of the graduated plate and the central axis of the base respectively, and the connecting rod penetrates through the first through hole and the second through hole to be fixedly connected with the main shaft. The connecting rod comprises a connecting part and a clamping part, one end of the clamping part is provided with a clamping groove and a clamping piece, and the clamping piece penetrates through the clamping groove to be clamped with a probe of the sideslip angle sensor. The problems that an existing sideslip angle sensor calibration tool is low in testing precision and poor in reliability and portability are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of sensors, and specifically relates to a calibration tool for a zero-pressure sideslip angle sensor. Background Art

[0002] The research on sideslip angle sensors is a national strategic development requirement. Under the current international situation, the domestic demand in the aviation field is becoming increasingly urgent, and it is of great significance to realize the localization of high-performance sideslip angle sensors. Generally, sideslip angle sensors can be divided into weathervane sensors, zero-pressure difference sensors, differential pressure ratio sensors, etc.

[0003] With the continuous development of aviation technology, the measurement of sideslip angle plays an important role. Advanced high-performance aircraft require high-precision and high-reliability sideslip angle sensors as basic configurations. As an important auxiliary device for zero-pressure sideslip angle sensors, the design of the calibration tool for zero-pressure sideslip angle sensors is also an important link in the entire R & D process of sideslip angle sensors. The calibration tools for general sideslip angle sensors have low test accuracy, poor reliability and portability, and cannot meet the requirements of high-performance aircraft sideslip angle sensors. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: to provide a calibration tool for a zero-pressure sideslip angle sensor, which solves the problems of low test accuracy, poor reliability and portability of the existing calibration tools for sideslip angle sensors.

[0005] The technical solution of the present invention is: the present invention provides a calibration tool for a zero-pressure sideslip angle sensor, including: an angle dividing instrument and a connecting rod;

[0006] The angle dividing instrument includes a main shaft, a dividing plate and a base. A first through hole and a second through hole are respectively provided on the central axes of the dividing plate and the base. The connecting rod passes through the first through hole and the second through hole and is fixedly connected to the main shaft;

[0007] The connecting rod includes a connecting portion and a clamping portion. One end of the clamping portion is provided with a clamping groove and a clamping card. The clamping card passes through the clamping groove and is clamped with the probe of the sideslip angle sensor.

[0008] Further, the main shaft is detachably connected to the dividing plate, the dividing plate is rotatably connected to the base, and the central axes of the main shaft, the dividing plate and the base coincide.

[0009] Further, a coarse adjustment knob is provided on the dividing plate, the coarse adjustment knob is provided on the side wall of the dividing plate, and a coarse adjustment locking member is provided on the base, and the coarse adjustment locking member is provided on the side wall of the base.

[0010] Further, the angle dividing instrument further includes a fine adjustment lead screw, which is arranged on the side away from the coarse adjustment locking member. The fine adjustment lead screw includes a fine adjustment knob and a fine adjustment locking member. The fine adjustment knob and the fine adjustment locking member are respectively arranged at both ends of the fine adjustment lead screw. The fine adjustment lead screw is rotationally connected to the dividing plate.

[0011] Further, the zero-pressure side slip angle sensor calibration tooling further includes a mounting bracket, which includes a first mounting plate, a second mounting plate and a bottom plate arranged in parallel from top to bottom. The base is detachably connected to the first mounting plate. A third through hole is provided on the first mounting plate. The connecting rod passes through the third through hole. The second mounting plate is detachably connected to the side slip angle sensor.

[0012] Further, a set of struts is provided between the second mounting plate and the bottom plate. The struts are detachably connected to the second mounting plate. A set of foot pads is provided at one end of the bottom plate close to the ground.

[0013] Further, one end of the connecting portion is fixedly connected to the main shaft, and the other end is fixedly connected to the clamping portion. A groove is provided on one side of the clamping portion close to the probe. The width of the groove at one end close to the connecting portion is smaller than the width of the groove at the end away from the connecting portion.

[0014] Further, the card slot includes a first card slot and a second card slot. Both the first card slot and the second card slot are parallel to the axis direction of the clamping portion. The first card slot and the second card slot penetrate through the outer wall of the clamping portion and are connected to the groove.

[0015] Further, a set of first cards is provided in the first card slot. The length of the first card is smaller than the length of the first card slot. The first card is slidably connected to the first card slot. A set of second cards is provided in the second card slot. The second card is slidably connected to the second card slot. Both the first card and the second card are clamped to the air inlet on the probe.

[0016] Further, a first card hole and a second card hole are respectively provided on the first card and the second card. Both the first card hole and the second card hole are provided at one end close to the connecting portion

[0017] The beneficial effects of the present invention are as follows: The present invention calibrates the sensor by setting an angle dividing instrument and a connecting rod. The dividing disc on the angle dividing instrument has precise scale markings, enabling high-precision angle division and providing an accurate reference angle for sensor calibration. The first through-hole and the second through-hole of the dividing disc and the central axis of the base ensure the precise alignment of the connecting rod with the main shaft, reducing installation errors and improving the angle transmission accuracy of the overall system. The connecting rod is fixedly connected to the main shaft, enabling the change of angle division to be transmitted to the sensor probe without loss, ensuring calibration accuracy. The combination of the card slot and the card provides reliable probe fixation, preventing data distortion caused by probe loosening or displacement during calibration, improving the repeatability and stability of calibration, and facilitating quick disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 Schematic structural diagram of a zero-pressure sideslip angle sensor calibration tooling provided by an embodiment of the present application;

[0020] Figure 2 For Figure 1 Schematic structural diagram of the angle dividing instrument in

[0021] Figure 3 For Figure 1 First schematic structural diagram of the connecting rod in

[0022] Figure 4 For Figure 1 Second schematic structural diagram of the connecting rod in

[0023] Description of the reference numerals in the drawings:

[0024] 1 - Angle dividing instrument, 2 - Connecting rod, 3 - Mounting bracket, 4 - Sideslip angle sensor;

[0025] 11 - Main shaft, 12 - Dividing disc, 13 - Base, 14 - Fine adjustment screw rod, 21 - Connecting part, 22 - Clamping part, 31 - First mounting plate, 32 - Second mounting plate, 33 - Base plate, 34 - Support column, 35 - Foot pad;

[0026] 121 - Coarse adjustment knob, 131 - Coarse adjustment locking part, 141 - Fine adjustment knob, 142 - Fine adjustment locking part, 221 - First card slot, 222 - Second card slot, 223 - First card, 224 - Second card, 225 - Groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0028] In the present invention, terms such as "first" and "second" are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, the meaning of "a plurality" is two or more.

[0029] The implementation of the present invention will be described in detail below with reference to specific accompanying drawings:

[0030] Figure 1 The following is a schematic structural diagram of a zero-pressure sideslip angle sensor calibration tooling provided for the embodiments of the present application. As Figure 1 shown, the sideslip angle sensor calibration tooling includes: an angle dividing instrument 1, a connecting rod 2, and a mounting bracket 3. Both the angle dividing instrument 1 and the sideslip angle sensor 4 to be measured are detachably connected to the mounting bracket 3. By integrating an angle reference generation, transmission, and sensor fixing function into a set of equipment, no additional auxiliary tools are required, simplifying the calibration process.

[0031] Figure 2 For Figure 1Schematic diagram of the structure of an angular dividing instrument. The angular dividing instrument 1 includes a main shaft 11, a dividing plate 12, a base 13, and a fine adjustment screw rod 14. The central axes of the main shaft 11, the dividing plate 12, and the base 13 coincide. The main shaft 11 is detachably connected to the dividing plate 12, and there are four bolt structures on the main shaft 11 for easy loading and unloading. The main shaft 11 is fixedly connected to the connecting rod 1, and the connecting rod 1 is fixedly connected to the main shaft 11, so that the change of angular division can be transmitted to the sensor probe without loss, ensuring the calibration accuracy. The base is a basic component for supporting the entire dividing instrument, usually having good rigidity and stability, and is used to be installed on a machine tool to provide a firm fixing foundation. The base provides stable support, and the precise connection between the main shaft and the connecting rod improves the anti-vibration and anti-deformation capabilities of the overall device, making it suitable for various working conditions. The dividing plate is the core component of the dividing instrument, engraved with equally divided scales or dividing holes, and is used to determine the dividing angle of the workpiece. The scales on the dividing plate are usually marked in degrees or minutes to ensure high precision. The main shaft of the angular dividing instrument is used to fix the workpiece and can rotate freely on the base. The rotation of the main shaft drives the workpiece to rotate to the required angle. A first through hole and a second through hole are respectively provided on the central axes of the dividing plate 12 and the base 13. The connecting rod 2 passes through the first through hole and the second through hole to be connected to the main shaft. The diameters of the first through hole and the second through hole are larger than the diameter of the connecting rod 2, and the connecting rod 2 does not contact the dividing plate 12 and the base 13. The first through hole and the second through hole on the central axes of the dividing plate 12 and the base 13 ensure the precise alignment of the connecting rod and the main shaft, reduce the installation error, and improve the angular transmission accuracy of the overall system.

[0032] A coarse adjustment knob 121 is provided on the side wall of the dividing plate 12, and a coarse adjustment locking member 131 is provided on the side wall of the base 13. The coarse adjustment knob 121 is used for a large-range preliminary adjustment of the dividing plate or the main shaft, and can quickly rotate the dividing instrument to an angle range close to the target, reducing the adjustment time and improving the work efficiency. The coarse adjustment locking member 131 is arranged on the side of the base 13 and is locked through a pressing plate connected to the dividing plate 12.

[0033] The fine adjustment screw rod 14 is arranged on the opposite side of the coarse adjustment locking member 131. Fine adjustment knobs 141 and fine adjustment locking members 142 are respectively provided at both ends of the fine adjustment screw rod 14. The fine adjustment screw rod 14 converts the fine linear displacement into the angular change of the dividing plate 12 by rotation to ensure the accuracy of adjustment. A threaded structure is provided on the fine adjustment screw rod 14, and the thread design can provide a large torque and higher adjustment smoothness, facilitating the precise positioning of the angle. After the fine adjustment is completed, the fine adjustment locking member 142 fixes the screw rod 14 and the dividing plate 12 through a pressing structure to ensure that the adjusted position will not shift due to external force or vibration. By adopting a double locking device of the coarse adjustment locking member 131 and the fine adjustment locking member 142, it can be ensured that the dividing instrument is not easily shifted due to vibration or external force after the coarse adjustment, further improving the reliability of the device.

[0034] The calibration structure further includes a mounting bracket 3, which includes a first mounting plate 31, a second mounting plate 32 and a bottom plate 33. A third through-hole is provided on the first mounting plate 31. The connecting rod 2 passes through the third through-hole and is connected to the main shaft 21. The base 13 is detachably connected to the first mounting plate 31 through a bolt structure. The side slip angle sensor to be measured is detachably connected to the second mounting plate 32. A set of support columns 34 are provided between the second mounting plate 32 and the bottom plate 33. The support columns 34 are detachably connected to the second mounting plate 32 and fixedly connected to the bottom plate 33. The support columns 34 can adjust the distance between the second mounting plate 32 and the bottom plate 33. A foot pad 35 is provided on the side of the bottom plate 33 close to the ground.

[0035] The connecting rod 2 includes a connecting portion 21 and a clamping portion 22. One end of the connecting portion 21 is connected to the main shaft 11, and the other end is connected to the clamping portion 22. The clamping portion 22 is provided with a first clamping groove 221 and a second clamping groove 222 parallel to the central axis of the clamping portion 22. A first card 223 is provided in the first clamping groove 221, and a second card 224 is provided in the second clamping groove 222. The first card 223 is slidably connected to the first clamping groove 221, and the second card 224 is slidably connected to the second clamping groove 222. The width of the first card 223 is smaller than the width of the first clamping groove 221, and the width of the second card 224 is smaller than the width of the second clamping groove 222. Different models of side slip angle sensors are adapted through a common clamping method to ensure the versatility and long-term reliability of the tooling. Both the first card 223 and the second card 224 are inserted into the air inlet on the probe of the side slip angle sensor to fix the angle of the probe of the side slip angle sensor. The combination of the clamping groove and the card provides reliable probe fixation, preventing data distortion caused by the loosening or displacement of the probe during the calibration process, and improving the repeatability and stability of the calibration.

[0036] A groove 225 is provided on the side of the clamping portion 22 close to the probe. The groove 225 fits the probe. The width of the groove 225 at one end close to the connecting portion 21 is greater than the width at the end far from the connecting portion 21. The first clamping groove 221 and the second clamping groove 222 penetrate through the outer wall of the clamping portion 22 and the bottom of the groove 225. The first card 223 and the second card 224 are respectively provided with a first card hole and a second card hole to facilitate the movement of the first card 223 and the second card 224.

[0037] Through the design of the zero-pressure type side slip angle sensor calibration tooling, the present invention achieves the effects of high precision, high reliability and convenience.

[0038] This side slip angle sensor calibration tooling improves the calibration accuracy, specifically including: Application of the angle dividing instrument: The dividing plate has precise scale markings, enabling high-precision angle division and providing an accurate reference angle for sensor calibration. Central axis alignment design: The first through-hole and the second through-hole of the central axes of the dividing plate and the base ensure the precise alignment of the connecting rod and the main shaft, reducing installation errors and improving the angle transfer accuracy of the overall system. Stable mechanical transmission: The connecting rod is fixedly connected to the main shaft, enabling the change of angle division to be transmitted to the sensor probe without loss, ensuring calibration accuracy.

[0039] This side slip angle sensor calibration tooling has reliability, specifically including: Robust structural design: The base provides stable support, and the precise connection between the main shaft and the connecting rod improves the vibration resistance and deformation resistance of the overall device, suitable for various working conditions. Design of the clamping part: The combination of the clamping groove and the card provides reliable probe fixation, preventing data distortion caused by probe loosening or displacement during the calibration process, and improving the repeatability and stability of calibration. Standardized connection: Adapts to different models of side slip angle sensors through a common clamping method, ensuring the versatility and long-term reliability of the tooling.

[0040] This side slip angle sensor calibration tooling is convenient for quick loading and unloading. Modular design: The connecting part and the clamping part of the connecting rod are modularly designed for easy disassembly and assembly, reducing the operation complexity of sensor calibration. Integrated calibration tooling: Integrates the functions of angle reference generation, transmission, and sensor fixation through a set of equipment, without the need for additional auxiliary tools, simplifying the calibration process. Easy-to-operate dividing plate: The markings on the dividing plate are clear and easy to adjust, reducing the manual intervention time and improving work efficiency.

[0041] Therefore, this tooling combines mechanical precision and operational convenience, can ensure high precision and reliability in complex calibration tasks, while reducing the difficulty and error of manual operation, providing an efficient and stable solution for the calibration of side slip angle sensors in actual use.

[0042] The zero-pressure side slip angle sensor calibration tooling provides a high-precision, stable, and convenient calibration method for the sensor through precise mechanical design and calibration process. The sensor calibration method based on the calibration tooling includes:

[0043] 1. Installation and preliminary alignment

[0044] Tooling fixation: Firmly install the base of the calibration tooling on the calibration platform to ensure its levelness and stability.

[0045] Sensor installation: Use the connecting rod clamping part in the tooling to firmly connect the zero-pressure side slip angle sensor to the tooling probe, ensuring that the sensor is aligned with the main shaft.

[0046] Initial alignment: Quickly adjust the angle of the indexing plate through the coarse adjustment knob to make the general direction of the sensor consistent with the reference, reducing the subsequent adjustment time.

[0047] 2. Generation of reference angle

[0048] Indexing plate adjustment: Use the scale of the indexing plate to generate a preset reference angle. For example, set standard angles such as 0°, 10°, 20°, etc. respectively for calibration.

[0049] Precise fine-tuning: Adjust the indexing plate to the target angle through the fine adjustment screw rod and fine adjustment knob to ensure high-precision angle setting.

[0050] Lock the angle: After the adjustment is completed, fix the indexing plate and the main shaft with the coarse adjustment locking part and the fine adjustment locking part to ensure the stability of the tooling angle.

[0051] 3. Data acquisition and sensor calibration

[0052] Zero calibration: With the indexing plate set to 0°, record the initial output value of the sensor and correct the zero pressure deviation. If the sensor has a deviation at 0°, perform zero compensation through the computer calibration system.

[0053] Angle calibration: Gradually adjust the indexing plate to different angles (such as ±10°, ±20°, etc.), and record the sensor output values corresponding to each angle. Compare the output values with the actual angles of the indexing plate to generate a calibration curve or calibration table for the sensor.

[0054] Repeated verification: Repeatedly adjust the indexing plate to the same angle, check the repeated measurement accuracy of the sensor, and ensure the stability and reliability of its calibration results.

[0055] 4. Calibration error correction

[0056] Nonlinear error compensation: If there is a nonlinear error between the output of the sensor and the actual angle, use the data fitting function (such as polynomial fitting) in the calibration system to generate a compensation formula.

[0057] Temperature compensation: If the sensor is easily affected by the ambient temperature, repeat the calibration under different temperature conditions, establish a relationship model between temperature and error, and apply real-time compensation.

[0058] 5. Saving and exporting calibration results

[0059] Parameter storage: Write the corrected zero point, linear compensation coefficient and other parameters into the internal memory of the sensor for subsequent automatic correction.

[0060] Report export: Generate a calibration report, including angle reference values, sensor output values, compensation data and calibration accuracy evaluation, as a complete record of the calibration.

[0061] The beneficial effects of using this calibration tooling and calibration method are as follows:

[0062] High precision: With the help of devices such as the indexing plate and fine-tuning screw rod of the tooling, a precise angle reference is provided to ensure calibration accuracy; Efficiency: Combining rough adjustment and fine adjustment makes the calibration process fast and efficient; High reliability: The tooling design ensures that the sensor is stable and firm during calibration, without loosening or error accumulation; Repeatability: The calibration results are consistent for multiple times, meeting the requirements of high industrial standards.

[0063] Obviously, the above are only the preferred embodiments of the present invention and the technical principles applied. Those skilled in the art will understand that the present invention is not limited to the specific embodiments here, and various obvious changes, re-adjustments, and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments. Without departing from the concept of the present invention, it can also include more other equivalent embodiments, and the scope of the present invention is determined by the scope of the appended claims.

[0064] Note that in the description of this specification, the descriptions referring to the terms "some embodiments", "other embodiments", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

Claims

1. A calibration tool for a zero-pressure sideslip angle sensor, characterized in that, Comprising: An angle indexer and a connecting rod; The angle indexer includes a main shaft, an index plate and a base. A first through hole and a second through hole are respectively provided on the central axis of the index plate and the base. The connecting rod passes through the first through hole and the second through hole and is fixedly connected to the main shaft; The connecting rod includes a connecting portion and a clamping portion. A clamping groove and a clamping card are provided at one end of the clamping portion. The clamping card passes through the clamping groove and is clamped with the probe of the sideslip angle sensor.

2. The zero-pressure sideslip angle sensor calibration tooling according to claim 1, characterized in that, The main shaft is detachably connected to the index plate, the index plate is rotatably connected to the base, and the central axes of the main shaft, the index plate and the base coincide.

3. A zero-pressure sideslip angle sensor calibration tooling according to claim 2, characterized in that, A coarse adjustment knob is provided on the index plate. The coarse adjustment knob is provided on the side wall of the index plate. A coarse adjustment locking member is provided on the base. The coarse adjustment locking member is provided on the side wall of the base.

4. A zero-pressure sideslip angle sensor calibration tooling according to claim 3, characterized in that, The angle indexer further includes a fine adjustment screw rod. The fine adjustment screw rod is provided on the side away from the coarse adjustment locking member. The fine adjustment screw rod includes a fine adjustment knob and a fine adjustment locking member. The fine adjustment knob and the fine adjustment locking member are respectively provided at both ends of the fine adjustment screw rod. The fine adjustment screw rod is rotatably connected to the index plate.

5. The zero-pressure sideslip angle sensor calibration tooling according to claim 1, characterized in that, The zero-pressure sideslip angle sensor calibration tooling further includes a mounting bracket. The mounting bracket includes a first mounting plate, a second mounting plate and a bottom plate which are arranged in parallel from top to bottom. The base is detachably connected to the first mounting plate. A third through hole is provided on the first mounting plate. The connecting rod passes through the third through hole. The second mounting plate is detachably connected to the sideslip angle sensor.

6. The zero-pressure sideslip angle sensor calibration tooling according to claim 5, characterized in that, A group of struts is provided between the second mounting plate and the bottom plate. The struts are detachably connected to the second mounting plate. A group of foot pads is provided at one end of the bottom plate close to the ground.

7. A zero-pressure sideslip angle sensor calibration tooling according to claim 1, characterized in that, One end of the connecting portion is fixedly connected to the main shaft, and the other end is fixedly connected to the clamping portion. A groove is provided on one side of the clamping portion close to the probe. The width of the groove at one end close to the connecting portion is smaller than the width of the groove at one end away from the connecting portion.

8. A zero-pressure sideslip angle sensor calibration tooling according to claim 7, characterized in that, The clamping groove includes a first clamping groove and a second clamping groove. Both the first clamping groove and the second clamping groove are parallel to the axis direction of the clamping portion. The first clamping groove and the second clamping groove penetrate through the outer wall of the clamping portion and are connected to the groove.

9. The zero-pressure sideslip angle sensor calibration tooling according to claim 8, wherein, A group of first clamping cards is provided in the first clamping groove. The length of the first clamping card is smaller than the length of the first clamping groove. The first clamping card is slidably connected to the first clamping groove; a group of second clamping cards is provided in the second clamping groove. The second clamping card is slidably connected to the second clamping groove. The first clamping card and the second clamping card are both clamped with the air inlet on the probe.

10. A zero-pressure sideslip angle sensor calibration tooling according to claim 9, characterized in that, First clamping holes and second clamping holes are respectively provided on the first clamping card and the second clamping card. The first clamping hole and the second clamping hole are both provided at one end close to the connecting portion.

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