A high-compatibility space radiation detector ground calibration device and control method thereof

Abstract

The present invention discloses a highly compatible ground calibration device for space radiation detectors and a control method thereof, wherein the calibration device comprises a two-stage lifting platform, a translation transport platform and an interface board. The ground calibration device of the present invention has a reasonable structural planning and a high degree of integration, and is conducive to meeting the requirements of high load, large stroke and minimum table height required for space radiation detectors during ground calibration tests. At the same time, the present invention has greater compatibility and can meet the calibration and testing requirements of different types of space radiation detectors, such as X-ray detectors, space calorimeters and other loads, and the present invention can realize rapid alignment of the calibration platform with the beam ray outlet, meet the requirements of different detectors for different inclination angles of the calibration platform table, and the control method is easy to implement, which helps to shorten the test time and improve the test efficiency, and is suitable for promotion and use in this field.

Description

Technical Field

[0001] The invention belongs to the technical field of space detection, and in particular relates to a high-compatibility ground calibration device, which is used for performing calibration tests on space radiation detectors on the ground. Background Art

[0002] The development history of domestic space radiation detectors is relatively early, but large-scale specialized space science observations began with the launch of the Space Science Pilot Project, such as the Dark Matter Particle Detection Satellite, the Hard X-ray Telescope, and the Advanced Space-based Solar Observatory Satellite. Before launching a space radiation detector into space, a large number of tests need to be carried out on the ground, especially the performance calibration of the detector, such as the imaging calibration and efficiency calibration of the detector.

[0003] The ground calibration of space high-energy particle detection is generally carried out under the condition of a fixed beam height. The height of the beam center is often fixed and relatively low. The most famous European Organization for Nuclear Research has a beam center height of only 1.3m, and the beam center height used for pulsar navigation in China is 1.25m. In order to gain greater acceptance, space high-energy particle detectors usually use a larger area. Considering the installation of tooling and other joint test equipment, it is usually required that the support surface of the calibration platform is as low as possible, generally less than 550mm, and preferably less than 500mm (both values ​​do not consider the turntable). The existing calibration platform is generally lifted and lowered by a scissor-type lifting mechanism. If the support surface is too low, the load-bearing capacity will drop rapidly (mainly because the load-bearing capacity is usually limited during the lifting stage). In addition, there is currently no calibration platform in China that can adapt to different radiation detectors, mainly because the requirements of each detector for various indicators of the platform are different. Therefore, we consider designing a highly compatible calibration device that can achieve high precision and a large travel range under the premise of a large load, while reducing the initial height of the table as much as possible and providing an adjustable table inclination function. This can not only shorten the time required for the calibration test, but also reduce duplication of construction and save money. However, it also faces great challenges. Summary of the invention

[0004] The technical purpose of the present invention is to design a highly compatible ground calibration device for space radiation detectors which can achieve high precision and a large travel range, while reducing the minimum travel height of the calibration platform as much as possible and having a table top inclination adjustable function.

[0005] The scheme designed by the present invention is as follows:

[0006] A high-compatibility ground calibration device for space radiation detectors comprises an interface platform, a two-stage lifting platform, a translation transport platform and a measurement feedback mechanism, wherein the interface platform comprises an interface board, and the measurement feedback mechanism is provided with a sensor for detecting the travel of the two-stage lifting platform, and is characterized in that:

[0007] The interface board is provided with an array of threaded holes, a turntable interface, a temperature and humidity sensor interface, and a level meter measurement position;

[0008] The two-stage lifting platform comprises a first-stage lifting mechanism and a second-stage lifting mechanism;

[0009] The first section lifting mechanism is a scissor lift, which includes a top frame, a bottom frame and a scissor pair connecting the top frame and the bottom frame. The interface platform is installed on the top frame, and a back-force support mechanism is installed on the upper surface of the bottom frame. The back-force support mechanism includes a plurality of spring members symmetrically distributed on the bottom frame. When the top frame descends to the initial position, the top frame presses on the spring members, and the spring members are in a compressed state.

[0010] The second stage lifting mechanism comprises screw lifts distributed at the four corners of the bottom frame, the screw lifts are vertically arranged on the outside of the bottom frame, the nut sleeve of the screw lift is connected to the bottom frame, and the bottom frame moves up and down along with the nut sleeve under the drive of the motor;

[0011] The translational transport platform is provided with a lifting platform and rollers installed under the lifting platform. The height of the upper surface of the lifting platform is less than the height of the lower surface of the bottom frame when the screw lift moves upward to the maximum stroke. The translational transport platform moves to the bottom of the bottom frame through the space channel formed between the lifted bottom frame and the table top or the ground below.

[0012] Based on the above scheme, the improved scheme also includes:

[0013] Further, the frame matrix of the top frame and the bottom frame is in the shape of a Chinese character 'Ri', including a rectangular outer frame and a cross beam fixedly arranged in the middle of the outer frame. A first lead screw mounting seat is provided on the cross beam, and the first lead screw mounting seat of the top frame is arranged downward, while the first lead screw mounting seat of the bottom frame is arranged upward. On the inner sides of the two side frames of the outer frame, two opposite horizontal linear chutes and two opposite shaft mounting seats are installed. The horizontal linear chutes and the shaft mounting seats are respectively located on the front and rear sides of the cross beam, and in the vertical direction, the horizontal linear chutes and the shaft mounting seats of the top frame respectively correspond to the horizontal linear chutes and the shaft mounting seats of the bottom frame up and down. One end of the scissor arm on one side of the scissor pair is connected to the horizontal linear chute through a slider type connecting shaft, and the other end of the scissor arm on the other side is connected to the shaft mounting seat through a hinge shaft. The scissor lift includes a first linear motion module installed on the top frame and a second linear motion module installed on the bottom frame. Both linear motion modules include a lead screw, a nut sleeve, and a servo motor. The two linear motion modules are arranged oppositely in the front and rear directions, and one end of the lead screw is installed on the top frame or the bottom frame through a second shaft mounting seat, and the other is installed in the first shaft mounting seat of the corresponding cross beam.

[0014] Further, the translation transport platform is a remote control universal translation transport platform, and the rollers under its lifting platform are a universal wheel set, which is driven by a servo motor provided with a remote control circuit.

[0015] Further, a disc type support foot is provided at the bottom of the screw jack.

[0016] Further, a limiting mechanism for fixedly connecting the bottom frame is provided on the lifting platform of the translation transport platform.

[0017] Further, the spring member of the return force support mechanism is a column type spring coil, and at the position corresponding to the spring coil, a limiting shaft core inserted into the spring coil from above is fixedly installed on the lower surface of the top frame.

[0018] Further, the measurement feedback mechanism is a linear displacement grating scale.

[0019] Further, the array of threaded holes is evenly distributed on the surface of the interface board, the temperature and humidity sensor interface is arranged on the opposite side of the interface board, and the leveling instrument measurement positions are evenly distributed on the edge side of the interface board.

[0020] Further, the servo motor of the first linear motion module is located below the interface board, and a door panel that can be opened or removed is provided on the interface board at the position corresponding to the servo motor.

[0021] A control method applied to the above-mentioned high-compatibility space radiation detector ground calibration device, characterized by including the following steps:

[0022] The motors of the four screw lifts are controlled to rotate forward and work together to lift the bottom frame until the height distance between the bottom frame and the lower table or the ground can be inserted into the translation transport platform. Then the translation transport platform is controlled to move to the bottom of the bottom frame, and then the bottom frame and its upper structure are lowered until the bottom frame contacts the lifting table of the translation transport platform, and the bottom of the screw lift is off the ground. The motors of the four screw lifts are controlled to stop working, and the translation transport platform is started to lift and transport the calibration device to the preset position.

[0023] When the calibration device reaches the preset position, the motors of the four screw lifts are controlled to rotate in the opposite direction and work together to drop the bottom of the screw lift to the ground, raise the bottom frame and detach it from the lifting surface of the translation transport platform. Then, the motors of the four screw lifts are controlled to stop working, the translation transport platform is moved away, and the motors of the four screw lifts are controlled to rotate in the forward direction to lower the bottom frame and its upper structure to the lowest extreme position.

[0024] The beneficial effects of the present invention are:

[0025] 1) The present invention realizes the separation of the lifting mechanism and the translation mechanism through the design of a two-stage lifting mechanism. After the lifting mechanism is separated from the translation mechanism, the minimum calibration height of the device can be further reduced. At the same time, the second-stage lifting mechanism uses a screw lifting platform. The matching clearance between the screw and the nut pair can realize the posture adjustment of the inclination angle of the interface plate within a certain range, meeting the calibration requirements of different situations;

[0026] 2) The present invention further increases the angle between the scissor arms of the scissor lift through the design of the back-force support mechanism, so as to reduce the minimum calibration height of the device. Specifically, during the descent process, the gravity of the scissor lift support platform is used to compress the spring member of the bottom back-force support mechanism, so that the spring member stores potential energy. When the scissor lift is lifted, the potential energy is used to compensate for the increased motor starting resistance due to the increase in the angle between the scissor arms, thereby further reducing the minimum calibration height of the calibration platform;

[0027] 3) The relatively independent external interface board design of the device of the present invention can provide the temperature and humidity environment and table inclination angle during the calibration test of the space high-energy radiation detector, and integrate different types of turntables as needed to provide the rotation angle requirements required for the detector calibration;

[0028] 4) The device of the present invention has a reasonable structural planning and high integration, and is conducive to meeting the high load, large stroke and minimum table height required by space radiation detectors during ground calibration tests. The calibration device of the present invention has greater compatibility and can meet the calibration test requirements of different types of space radiation detectors, such as X-ray detectors, space calorimeters and other loads, and can quickly align the calibration platform with the beam ray outlet, meet the requirements of different detectors for different inclination angles of the calibration platform table, and the control method is easy to implement, which helps to shorten the test time and improve the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The three-dimensional structure of the device of the present invention is shown in FIG. Figure 1 ;

[0030] Figure 2 The three-dimensional structure of the device of the present invention is shown in FIG. Figure 2 ;

[0031] Figure 3 It is a partial structural schematic diagram of the support frame of the device of the present invention;

[0032] Figure 4 It is a schematic structural diagram of the bottom frame of the device of the present invention;

[0033] Figure 5 It is a structural schematic diagram of a translation transport platform;

[0034] Figure 6 It is a comparison diagram of the descending and ascending states of the device of the present invention;

[0035] Figure 7 It is a structural schematic diagram of the interface board of the device of the present invention.

[0036] The reference numerals in the above drawings are respectively:

[0037] 1-interface station, 101-interface board;

[0038] 2-two-stage lifting mechanism, 201-top frame, 202-bottom frame, 203-servo motor, 204-nut sleeve, 205-spring, 206-screw rod, 207-servo motor, 208-scissor pair, 209-slider type connecting shaft, 210-shaft rod mounting seat, 212-transverse linear slide, 213-screw rod, 214-disc base;

[0039] 3-translation transport platform, 301-lifting platform, 302-roller, 303-limiting mechanism;

[0040] 4-Measurement feedback mechanism. DETAILED DESCRIPTION

[0041] The present invention will now be described in further detail with reference to the accompanying drawings.

[0042] A highly compatible ground calibration device for space radiation detectors includes an interface platform 1, a two-stage lifting platform 2, a translation transport platform 3, a measurement feedback mechanism 4 and other main components, such as Figures 1 to 7 As shown, the specific structure of each part is as follows:

[0043] (I) Interface station 1

[0044] The interface station 1 comprises a grid plate and an interface plate 101 which is flatly and fixedly installed above the grid plate.

[0045] The interface board 101 is designed with an array of threaded holes 101-5, a turntable interface, a temperature and humidity sensor interface 101-3 and a level meter measuring position 101-2, wherein:

[0046] The array threaded holes 101 - 5 are evenly distributed on the surface of the interface board 101 and are used for fixing and connecting the high-energy radiation detector during the test process. The work surface can also be further expanded as needed.

[0047] The interface board 101 is provided with at least one turntable interface for installing the turntable 101 - 4 to meet the installation requirements of different turntables selected in different detector calibration experiments;

[0048] The interface board 101 is provided with temperature and humidity sensor interfaces 101-3 on two opposite sides in at least one direction, which are used to monitor the temperature and humidity environment during the calibration test;

[0049] The interface plate 101 has reserved level measuring positions 101-2 (the positions for installing or placing the level measuring positions 101-2) at both ends and the middle position of the opposite side edges in at least one direction, which are used to coordinate with the adjustment of the inclination angle required by the calibration platform during the test (generally required to be horizontal 0°).

[0050] When replacing the equipment below the maintenance interface board 101 may cause interference, a detachable or openable door panel 101 - 1 may be reserved at this position.

[0051] In this embodiment: The interface board 101 is made of stainless steel, with a length of 2000 mm, a width of 1200 mm, a thickness of 10 mm, a surface flatness better than 0.01 mm, a load-bearing capacity exceeding 1500 kg, and reserved M6 array threaded holes with a hole pitch of 100 mm; Two high-precision temperature and humidity integrated sensors that can be remotely monitored are installed on the top of the interface board 101, with a temperature accuracy of 0.1 °C and a relative humidity accuracy of ±2%; Measuring positions for 6 small spirit levels are reserved on the top of the interface board 101, and the inclination measurement accuracy of the spirit level is 0.01 °; Installation interfaces for 2 turntables 101-4 are reserved. The two turntables 101-4 can be installed separately or used simultaneously according to needs. One turntable has a load-bearing capacity of 250 kg, an angular resolution of 0.1 ″, and an accuracy of 2 ″, and the other turntable has a load-bearing capacity of more than 500 kg, an angular resolution of 2.6 ″, and an accuracy of 18 ″ (the two sets of rotating platforms can be used separately or simultaneously according to needs). The instruments installed on the interface board 101 can be configured with different parameters according to specific requirements in other projects. If weight reduction is considered for this device, other lightweight and high-strength materials, such as aluminum alloy and titanium alloy, can also be considered.

[0052] (2) Two-stage lifting platform

[0053] The two-stage lifting platform includes a first-stage lifting mechanism and a second-stage lifting mechanism.

[0054] The first-stage lifting mechanism is a scissor lift, and the scissor lift includes a top frame 201, a bottom frame 202, and a scissor pair 208 connecting the two.

[0055] Both the top frame 201 and the bottom frame 202 are rectangular frames, and the frame bases of the two are in a "day" shape. Taking the bottom frame 202 as an example, as Figure 4 shown, the "day"-shaped frame structure includes a rectangular outer frame and a cross beam fixedly arranged in the middle of the outer frame. A first lead screw mounting seat is provided on the cross beam. The first lead screw mounting seat of the top frame 201 is arranged downward, and the first lead screw mounting seat of the bottom frame 202 is arranged upward.

[0056] In this embodiment, a single-layer scissor pair is used (according to actual situations, the scissor pair can also be a multi-layer structure), and this scissor pair includes left and right groups of parallel and symmetric scissor arms.

[0057] Corresponding to the left and right groups of scissor arms, the inner sides of the outer frame are provided with left and right opposite horizontal linear chutes 212 and left and right opposite shaft rod mounting seats 210. The horizontal linear chutes 212 and the shaft rod mounting seats 210 are respectively located on the front and rear sides of the cross beam, and as Figure 3As shown, the transverse linear slide groove of the top frame 201 corresponds to the transverse linear slide groove of the bottom frame 202 in the upper and lower parts, the shaft rod mounting seat of the top frame 201 corresponds to the shaft rod mounting seat of the bottom frame 202 in the upper and lower parts, the end of the scissor arm on the front side of the scissor pair 208 is limitedly installed in the transverse linear slide groove 212 through the slider-type connecting shaft 209, and the end of the scissor arm on the rear side is connected to the shaft rod mounting seat 210 through the hinge shaft. When the angle of the scissor arm changes, the end of the scissor arm on the front side performs linear reciprocating motion along the extension direction of the transverse linear slide groove 212 (one end of the slider-type connecting shaft 209 is a slider installed in the transverse linear slide groove 212, and the other end is a shaft rod hinged to the scissor arm), while the end of the scissor arm on the rear side only rotates around its hinge shaft, and does not generate displacement in the front-to-back direction.

[0058] The scissor lift comprises a first linear motion module and a second linear motion module which are arranged opposite to each other in the front and rear directions, and both linear motion modules comprise a lead screw, a nut sleeve and a servo motor.

[0059] like Figure 3 As shown, the motor 203 of the first linear motion module is installed at the rear side of the top frame 201, one end of the screw rod is connected to the top frame 201 through the shaft rod mounting seat, and the other end is limitedly installed in the shaft rod mounting seat of the top frame cross beam. The servo motor 207 of the second linear motion module is installed at the front side of the bottom frame 202, one end of the screw rod is connected to the bottom frame 202 through the second shaft rod mounting seat, and the other end is limitedly installed in the first shaft rod mounting seat of the bottom frame cross beam.

[0060] After the servo motors of the two linear motion modules are started synchronously, the nut sleeves on their respective screw rods are controlled to move longitudinally in a push-pull manner, causing the angle of the scissor arms to change, which is then converted into a lifting motion of the scissor lift to control the height of the interface platform 1. Figure 6 Therefore, the length of the transverse linear slide 212 determines the lifting height of the scissor lift. According to actual needs, the travel range of the scissor lift can be adjusted by changing the length of the transverse linear slide 212.

[0061] The grid plate of the interface station 1 is fixedly mounted on the top frame 201, and the servo motor 203 of the first linear motion module is located below the interface plate 101. The interface plate 101 is provided with an openable or removable door panel at the edge position corresponding to the servo motor 203 to facilitate inspection and maintenance and avoid interference.

[0062] The second stage lifting mechanism includes four screw lifts respectively arranged at the four corners of the bottom frame 202. The screw lift includes a screw, a nut sleeve and a servo motor 203. A disc-type base 214 is installed at the bottom of the screw. The nut sleeve is rigidly connected to the bottom frame 202 through a connecting seat, and the housing of the servo motor 203 is also fixed to the connecting seat. Each screw lift is vertically arranged on the outside of the bottom frame 202. Under the drive of the servo motor 203, the bottom frame 202 can move up and down with the nut sleeve on the screw 213.

[0063] The upper surface of the bottom frame 202 of the first section lifting mechanism is equipped with a back-force support mechanism, which includes a plurality of spring members 205 symmetrically distributed on the front and rear sides of the bottom frame 202. When the top frame 201 descends to the initial position, the top frame 201 presses on the spring members, and the spring members 205 are in a compressed state. Figure 1 , Figure 6 As shown, in this embodiment, the spring member of the return force support mechanism adopts a column-type spring coil. At the position corresponding to the spring coil, a limiting shaft core inserted into the spring coil from above is fixedly installed on the lower surface of the top frame 201 to prevent the spring coil from being offset in the axial direction.

[0064] (III) Translation transport platform

[0065] The translation transport platform 3 is provided with a lifting platform 301 and rollers 302 installed below the lifting platform. The upper surface height of the lifting platform 301 is less than the lower surface height of the bottom frame 202 when the screw lift moves upward to the maximum stroke. The translation transport platform 3 can move to the bottom of the bottom frame 202 through the space channel formed between the raised bottom frame 202 and the table surface or the ground below, so as to contact the lowered bottom frame 202. At the same time, a limiting mechanism such as a positioning pin is provided on the lifting platform 301 to fix the bottom frame 202, so as to prevent the two-stage lifting platform from moving on the lifting platform surface during translation or posture adjustment.

[0066] In practice, the translation transport platform 3 preferably adopts a remote control universal translation transport platform, and the rollers under the lifting platform are universal wheel sets, which are driven by a servo motor with a remote control circuit, and the translation transport platform 3 can be conveniently transferred in any direction. This is the prior art and will not be described in detail. In this embodiment, the size of the lifting platform 301 is 1000mm×800mm×10mm, and it is made of steel.

[0067] (IV) Measurement feedback mechanism

[0068] The measurement feedback mechanism 4 includes sensors for detecting the movement stroke of the first lifting mechanism and the second lifting mechanism. In the present embodiment, both use linear displacement grating scales, which have high-precision measurement display and feedback functions, and the measurement accuracy is better than 0.01mm. After the overall integration of the device is completed, after calibration, the displacement accuracy is better than 0.02mm. The signal output end of the sensor is connected to the remote control platform through a wireless communication device, which can greatly avoid the radiation effect on people during the test of high-energy radiation detectors. The grating scale selected in this embodiment takes into account the calibration requirements of most high-energy radiation detectors, but it can be further optimized and replaced with a higher-precision grating scale, or other types of spherical grating scales and magnetic grating scales with measurement and feedback functions as needed.

[0069] In this embodiment, the maximum horizontal displacement stroke of the screw rod of the scissor-type lifting platform is designed to be 700mm, the lowest table height of the interface plate is 460mm, and the maximum lifting stroke is 550mm; the maximum effective displacement stroke of the screw rod lift is 270mm.

[0070] Working principle:

[0071] The two-stage lifting mechanism of the ground calibration device of the present invention can both realize the height lifting of the docking platform 1, but the working stage is mainly completed by the scissor-type lifting platform of the first stage lifting mechanism to complete the large-scale lifting and height adjustment of the docking platform 1, while the screw lifting platform of the second stage lifting mechanism is mainly used for fine-tuning the tilt posture of the docking platform, and cooperating with the translation transport platform 3 to realize the lifting of the mechanism above the bottom frame 202. Specifically:

[0072] 1) Lifting operation

[0073] When the interface platform 1 is at the lowest height, the angle between the two arms of the scissor pair 208 is close to 180°. At this time, the lifting with load requires a high output torque of the motor; during the lifting process, as the angle between the two arms of the scissor pair 208 gradually decreases, the vertical displacement movement requires a rapid decrease in the output torque of the motor. In order to reduce the difficulty of initial lifting, spring parts are set at the four corners below the top frame. When the interface platform 1 is lifted from the lowest position, the spring parts are in a compressed state to release elastic potential energy, thereby reducing the actual load demand for the motor output torque.

[0074] 2) Translation operation

[0075] The control system of the remote control platform controls the four servo motors 203 at the four corners of the second lifting mechanism to work together to lift the bottom frame 202 until the height distance between the bottom frame 202 and the lower table or the ground can be inserted into the translation transport platform 3. Then the translation transport platform 3 is remotely controlled to move autonomously to the bottom of the bottom frame 202, and the bottom frame 202 and its upper structure are lowered until the bottom frame 202 contacts the lifting table 301 of the translation transport platform 3. At this time, the four servo motors 203 continue to work. Because the bottom frame 202 and the nut sleeve on the screw lifting platform cannot be lowered any further, the screw will drive the bottom disc base 214 to lift relative to the bottom frame. When the disc base 214 is off the ground, the servo motor 203 can stop moving. After the bottom frame 202 and the lifting platform 301 are fixed by the limiting mechanism, the translation transport platform 3 is started to transfer the calibration device as a whole to a suitable position.

[0076] When the calibration device is working, the reverse operation of the above process is implemented to evacuate the translation transport platform 3 so that the detection device on the interface board 101 can work at the lowest height.

[0077] 3) Posture adjustment operation

[0078] Because there is a matching gap between the lead screw structure and its nut sleeve, the remote control platform can independently control the servo motors 203 at the four corners of the second lifting mechanism to work independently, so as to achieve fine adjustment of the inclination angle of the interface board 101 and adjust it to a horizontal state or a non-horizontal state. The lead screw lifter model used in this embodiment is YS80B5-0.75KW, the lead screw specification is Tr40*7, and the maximum horizontal inclination angle of each side of the interface board 101 can be controlled between 2 and 5 degrees.

[0079] Through the above operations, the calibration device of the present invention can adjust the detectors and other equipment on the interface board 101 to the appropriate position and direction of the ray beam. When the calibration device of the present invention is working, the bottom is directly in contact with the ground (or in order to avoid the impact of uneven ground, it can also be supported only by the disc-type bases 214 at the four corners, and the bottom frame 202 is controlled to be 1 to 2 mm above the ground). Before and after the test, the calibration device needs to be preliminarily calibrated with the incident direction of the beam. Manual adjustment can be used at this stage, and short-distance transportation can be performed through translation operation. A remote control circuit board interface for controlling each servo motor is reserved on the surface of the interface board 101, and finally remote control transportation and angle adjustment inside the factory are realized.

[0080] Considering the irradiation during the beam test process, it is common to use a calibration platform with a remote control function. However, there is currently no calibration device in China that meets the following conditions at the same time: a load of 1500kg or more, a minimum table height (from the ground) not exceeding 500mm, a displacement accuracy of 0.03mm or better, and compatibility with turntables of different requirements; a calibration platform with the above indicators can be compatible with the calibration tests of most space radiation detectors currently developed in China or that may be developed in the future. And it has been verified in practice that the maximum safe load of the calibration device of this embodiment can currently reach 1620kg (design value 1200kg, design margin 1.35), and based on the existing high-precision screw mechanism, the displacement accuracy can be controlled at about 0.01mm, which is better than the existing calibration device, and can be compatible with the calibration tests of most space radiation detectors currently developed in China, and there is room for further optimization. At the same time, according to the results of actual tests, under full load conditions, with the help of an auxiliary support mechanism, the output current of the servo motor of the scissor lift is reduced from 5A to 2A, which is more than half. This design helps to increase the load-bearing capacity of the platform, and can also protect the drive motor from overload, thereby increasing safety and reliability. The external interface board design of the calibration device of this embodiment can provide the temperature and humidity environment and table inclination angle during the calibration test of space high-energy radiation detectors, and integrate different types of turntables as needed to provide the angle requirements for detector calibration. The calibration device of this embodiment can realize the calibration requirements for adjusting the table inclination angle as needed, and overcome the adverse effects caused by the uneven ground of the test site, thereby solving the problem of rapid installation and alignment of the ground calibration platform.

[0081] It should be noted that the terms such as "upper", "lower", "left", "right", "front", "back", etc. cited in the invention are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments in their relative relationships should be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0082] The above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should be regarded as the protection scope of the present invention.

Claims

1. A ground calibration device for a highly compatible space radiation detector, comprising an interface platform (1), a two-stage lifting platform (2), a translation and transportation platform (3), and a measurement and feedback mechanism (4). The interface platform (1) includes an interface board (101), and the measurement and feedback mechanism (4) is provided with a sensor for detecting the stroke of the two-stage lifting platform (2). It is characterized in that: The interface board (101) is provided with an array of threaded holes, a turntable interface, a temperature and humidity sensor interface (101-3), and a spirit level measurement position (101-2); The two-stage lifting platform (2) includes a first-stage lifting mechanism and a second-stage lifting mechanism; The first-stage lifting mechanism is a scissor lift, which includes a top frame (201), a bottom frame (202), and a scissor pair (208) connecting the two. The interface platform (1) is installed on the top frame (201). A return force support mechanism is installed on the upper surface of the bottom frame (202). The return force support mechanism includes a plurality of spring members (205) symmetrically distributed on the bottom frame. When the top frame (201) descends to the initial position, the top frame (201) presses on the spring members (205), and the spring members (205) are in a compressed state; The second-stage lifting mechanism includes screw jacks arranged at the four corners of the bottom frame (202). The screw jacks are vertically arranged outside the bottom frame (202). The nut sleeve of the screw jack is connected to the bottom frame (202). Driven by a motor, the bottom frame (202) moves up and down with the nut sleeve; The translation and transportation platform (3) is provided with a lifting platform (301) and rollers (302) installed below the lifting platform. The height of the upper surface of the lifting platform (301) is less than the height of the lower surface of the bottom frame (202) when the screw jack moves upward to the maximum stroke. The translation and transportation platform (3) moves to the lower part of the bottom frame (202) through the space channel formed between the lifted bottom frame (202) and the lower tabletop or the ground; The frame bases of the top frame (201) and the bottom frame (202) are in the shape of "日", including a rectangular outer frame and a cross beam fixedly arranged in the middle of the outer frame. A first screw rod mounting seat is arranged on the cross beam, and the first screw rod mounting seat of the top frame is arranged downward, while the second screw rod mounting seat of the bottom frame is arranged upward; On the inner sides of the two side frames of the outer frame, two opposite left and right horizontal linear chutes (212) and two opposite shaft rod mounting seats (210) are installed. The horizontal linear chutes (212) and the shaft rod mounting seats (210) are respectively located on the front and back sides of the cross beam. And in the vertical direction, the horizontal linear chutes and the shaft rod mounting seats of the top frame (201) are respectively vertically corresponding to the horizontal linear chutes and the shaft rod mounting seats of the bottom frame (202); One end of the scissor arm on one side of the scissor pair (208) is connected to the horizontal linear chute (212) through a slider type connecting shaft (209), and the end of the scissor arm on the other side is connected to the shaft rod mounting seat (210) through a hinge shaft; The scissor lift comprises a first linear motion module mounted on a top frame (201) and a second linear motion module mounted on a bottom frame (202), both linear motion modules comprising a screw rod, a nut sleeve and a servo motor, the two linear motion modules are arranged opposite to each other in the front and rear directions, one end of the screw rod is mounted on the top frame (201) or the bottom frame (202) through a second shaft rod mounting seat, and the other end is mounted in the first shaft rod mounting seat of the corresponding crossbeam.

2. The ground calibration device for a high-compatibility space radiation detector according to claim 1, characterized in that: The translation transport platform (3) is a remote-controlled universal translation transport platform, and the rollers below the lifting platform (301) are universal wheel sets, which are driven by a motor provided with a remote control circuit.

3. The high-compatibility space radiation detector ground calibration device according to claim 1, characterized in that: A disc-type base (214) is provided at the bottom of the screw lift.

4. The high-compatibility space radiation detector ground calibration device according to claim 1, characterized in that: A limiting mechanism (303) fixedly connected to the bottom frame (202) is provided on the lifting platform (301) of the translation transport platform (3).

5. The ground calibration device for a high-compatibility space radiation detector according to claim 1, characterized in that: The spring member (205) of the return force support mechanism is a column-type spring coil, and at a position corresponding to the spring coil, a limiting shaft core inserted into the spring coil from above is fixedly mounted on the lower surface of the top frame (201).

6. The high-compatibility space radiation detector ground calibration device according to claim 1, characterized in that: The measurement feedback mechanism (4) is a linear displacement grating ruler.

7. The ground calibration device for a high-compatibility space radiation detector according to claim 1, characterized in that: The array threaded holes are evenly distributed on the surface of the interface board (101), the temperature and humidity sensor interface (101-3) is arranged on the opposite side of the interface board, and the level meter measurement positions (101-2) are evenly distributed on the edge side of the interface board.

8. The ground calibration device for a high-compatibility space radiation detector according to claim 1, characterized in that: The servo motor of the first linear motion module is located below the interface plate (101), and the interface plate (101) is provided with an openable or detachable door plate (101-1) at a position corresponding to the servo motor.

9. A control method for a ground calibration device for a high-compatibility space radiation detector according to any one of claims 1 to 8, characterized in that: The following steps are involved: The motors of the four screw lifts are controlled to rotate forward and work together to lift the bottom frame (202) until the height of the bottom frame (202) and the lower table or ground is enough to be inserted into the translation transport platform (3), and then the translation transport platform (3) is controlled to move to the bottom of the bottom frame (202), and then the bottom frame (202) and its upper structure are lowered until the bottom frame (202) contacts the lifting table of the translation transport platform (3), and the bottom of the screw lift is off the ground, and the motors of the four screw lifts are controlled to stop working, and the translation transport platform (3) is started to lift and transport the calibration device to a preset position; When the calibration device reaches the preset position, the motors of the four screw lifts are controlled to rotate in the reverse direction and work together to drop the bottom of the screw lifts to the ground, prop up the bottom frame (202) and separate it from the lifting table of the translation transport platform (3). Then, the motors of the four screw lifts are controlled to stop working, the translation transport platform (3) is moved away, and the motors of the four screw lifts are controlled to rotate in the forward direction to lower the bottom frame (202) and its upper structure to the lowest limit position.

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