Electromagnetic vibration table for non-refrigeration infrared machine core assembly adopting multiple sensors

Abstract

The invention discloses an electromagnetic vibration table for an uncooled infrared machine core assembly adopting multiple sensors, and relates to the technical field of vibration tables. By arranging four groups of vibration testing mechanisms of low frequency, intermediate frequency, high frequency and ultrahigh frequency, vibration waves of different frequencies can be synchronously or alternately generated, complex operation conditions of the uncooled infrared movement in real environments such as transportation jolting, mechanical shock and high-frequency vibration can be simulated, and vibration testing of different vibration frequencies can be performed on a plurality of uncooled infrared movement assemblies at the same time. Wherein the low-frequency vibration testing mechanism and the intermediate-frequency vibration testing mechanism can simulate low-frequency vibration in a transportation process, the high-frequency vibration testing mechanism can simulate high-frequency noise interference in operation of the uncooled infrared movement, and the ultrahigh-frequency vibration testing mechanism can simulate an instantaneous impact working condition of the uncooled infrared movement in an extreme environment. Therefore, each uncooled infrared movement to be tested can undergo vibration tests in various modes, full-band coverage tests are realized, and the accuracy and credibility of test results are greatly improved.

Description

Technical Field

[0001] This invention relates to the field of vibration table technology, specifically to an electromagnetic vibration table using a multi-sensor uncooled infrared core assembly. Background Technology

[0002] Employing uncooled infrared core components with multiple sensors, this system integrates data from infrared thermal imaging with other types of sensors, such as visible light cameras, lidar, inertial measurement units (IMUs), and gas sensors, to achieve more comprehensive and high-precision environmental perception and target recognition. It is widely used in military, security, autonomous driving, industrial inspection, and medical diagnostics fields.

[0003] The uncooled infrared core components include the Core series, HD series, Micro series, and Mini series. In the quality control process for the production of uncooled infrared core components, vibration and impact tests on a vibration table are required to simulate the vibration environment during transportation and use. Only after verifying the structural reliability can the components be put into use.

[0004] Referring to the patent application with publication number CN222761836U, an electromagnetic vibration table that facilitates heat dissipation is disclosed. The excitation signal is emitted through a control panel fixedly installed on one side of the electromagnetic vibration table housing. The vibration base connected to the coil is driven by a first magnetic field coil and a second magnetic field coil placed in a magnetic field. The upper guide system and the lower guide system of the moving coil are used to stabilize the device.

[0005] The electromagnetic vibration table in the prior art has the following drawbacks in practical use: Traditional vibration tables mostly adopt a single-frequency band design, which makes it difficult to simultaneously cover multi-frequency vibration environments of low frequency, medium frequency, high frequency and ultra-high frequency. This results in the need for multiple devices to be tested in batches, which is inefficient and cannot simulate the working conditions of multi-frequency composite vibration in real scenarios. Currently, vibration tables mostly use segmented current regulation to adjust the vibration frequency, which cannot achieve continuous stepless adjustment of the amplitude. This makes it easy for the amplitude to fluctuate significantly due to large vibration acceleration control errors, which cannot meet the vibration accuracy testing requirements of precision test pieces.

[0006] Therefore, the present invention proposes an electromagnetic vibration table for an uncooled infrared core assembly using multiple sensors to solve the above problems. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides an electromagnetic vibration table for uncooled infrared core components using multiple sensors. This solves the problem that traditional vibration tables mostly adopt a single-frequency band design, making it difficult to simultaneously cover multi-frequency vibration environments including low, medium, high, and ultra-high frequencies. This results in the need for multiple devices to conduct batch tests, leading to low efficiency and an inability to simulate the multi-frequency composite vibration conditions in real-world scenarios. Furthermore, most traditional vibration tables use segmented current regulation to adjust the vibration frequency, failing to achieve continuous stepless adjustment of the amplitude. This makes it prone to large amplitude fluctuations due to large vibration acceleration control errors, which cannot meet the vibration accuracy testing requirements of precision test pieces.

[0008] To achieve the above objectives, the present invention provides the following technical solution: an electromagnetic vibration table for an uncooled infrared core assembly using multiple sensors, comprising a test table and a turntable driven to rotate on top of the test table by a servo motor; a control console for controlling the vibration testing process is also provided on one side of the test table; and further comprising: Low-frequency vibration testing mechanism, medium-frequency vibration testing mechanism, high-frequency vibration testing mechanism and ultra-high-frequency vibration testing mechanism are evenly arranged on the top of the turntable for loading the uncooled infrared core component to be tested using multiple sensors. The low-frequency vibration testing mechanism, medium-frequency vibration testing mechanism, high-frequency vibration testing mechanism and ultra-high-frequency vibration testing mechanism can generate vibration waves of different frequencies at different testing stations, or generate rapidly changing vibration waves at a single testing station to simulate different application scenarios of uncooled infrared core components in real environment; An L-shaped support arm is fixedly installed on one side of the top of the test bench. At the bottom of the L-shaped support arm and directly above the turntable, there is a multi-frequency vibration control mechanism for cooperating with the low-frequency vibration testing mechanism, medium-frequency vibration testing mechanism, high-frequency vibration testing mechanism and ultra-high-frequency vibration testing mechanism to perform low-frequency vibration testing, medium-frequency vibration testing, high-frequency vibration testing and ultra-high-frequency vibration testing, and the vibration frequency can be flexibly adjusted according to the testing requirements. Multiple vibration isolation pads are evenly distributed on the top of the turntable to reduce the impact of resonance on the low-frequency vibration testing mechanism, the medium-frequency vibration testing mechanism, the high-frequency vibration testing mechanism, and the ultra-high-frequency vibration testing mechanism.

[0009] Furthermore, the low-frequency vibration testing mechanism, medium-frequency vibration testing mechanism, high-frequency vibration testing mechanism, and ultra-high-frequency vibration testing mechanism have the same structure. The low-frequency vibration testing mechanism includes an electromagnetic vibration table assembly fixedly mounted on the top of the vibration isolation pad. The top of the electromagnetic vibration table assembly has a test cavity for placing the uncooled infrared core assembly with multiple sensors to be tested. Multiple sliding grooves are evenly distributed around the bottom of the test cavity. A clamping plate is slidably mounted in each of the sliding grooves. The multiple clamping plates are locked to the electromagnetic vibration table assembly by fastening bolts. A support plate is also fixedly mounted on the side wall of the electromagnetic vibration table assembly. A first metal spring and a second metal spring for transmitting electrical energy to the multi-frequency vibration control mechanism are fixedly mounted on the top two sides of the support plate, respectively. A drive unit is also provided on the top side of the support plate near the electromagnetic vibration table assembly.

[0010] Furthermore, the driving unit includes a wedge block, and a horizontal bearing area is provided at the top center of the wedge block. A protrusion and a groove are respectively provided on both sides of the horizontal bearing area.

[0011] Furthermore, the multi-frequency vibration control mechanism includes a mounting plate fixedly installed at one end of an L-shaped support arm. Low-frequency vibration control components, medium-frequency vibration control components, high-frequency vibration control components, and ultra-high-frequency vibration control components are evenly arranged around the outer wall of the mounting plate. A junction box for supplying electrical energy to the low-frequency vibration control components, medium-frequency vibration control components, high-frequency vibration control components, and ultra-high-frequency vibration control components is provided at the bottom center of the mounting plate. The junction box is connected to the power supply through wires.

[0012] Furthermore, the low-frequency vibration control component includes a support base and a first power connection component and a second power connection component disposed on both sides inside the support base. An energy control component is disposed inside the support base and between the first and second power connection components. A current control component for controlling the magnitude of the current is disposed inside the support base and above the energy control component. The low-frequency vibration control component, the medium-frequency vibration control component, the high-frequency vibration control component, and the ultra-high-frequency vibration control component have the same structure.

[0013] Furthermore, the second power connection assembly includes a sleeve fixedly installed inside the bearing seat. A first lifting column is slidably installed inside the sleeve. A metal contact is fixedly installed at the bottom end of the first lifting column. A first spring is slidably installed on the outer wall of the first lifting column between the metal contact and the sleeve. The second power connection assembly has the same structure as the first power connection assembly.

[0014] Furthermore, the power control component includes a bearing sleeve that slides through the bearing seat. The bearing sleeve has a first clearance groove and a second clearance groove on its two side walls, respectively. A second lifting column is slidably disposed inside the bearing sleeve. The second lifting column is locked in position by locking bolts and the bearing sleeve. The side wall of the bearing sleeve also has a scale groove for marking the position of the top of the second lifting column. Guide rods are fixedly disposed on both sides of the outer wall of the bearing sleeve by mounting brackets. The guide rods slide through the bearing seat and are fixedly disposed with baffles to limit the position of the bottom of the second lifting column. A second spring is slidably disposed on the outer wall of the guide rod between the mounting bracket and the bearing seat. A rack is fixedly disposed at the top of the bearing sleeve.

[0015] Furthermore, the current control assembly includes an insulating plate fixedly mounted on the inner wall of the bearing seat. An annular resistance wire is fixedly mounted on the side wall of the insulating plate, and a drive shaft is rotatably mounted on the side wall of the insulating plate. A gear that meshes with a rack is fixedly mounted at the end of the drive shaft away from the insulating plate. A conductive metal sleeve is fixedly mounted on the outer wall of the insulating plate. A brush is fixedly mounted on one side of the outer wall of the conductive metal sleeve. One end of the brush is electrically slidably connected to the outer wall of the annular resistance wire. A first terminal is rotatably mounted on one side of the outer wall of the conductive metal sleeve. The first terminal is fixedly mounted on the side wall of the insulating plate. A second terminal is fixedly mounted at one end of the annular resistance wire.

[0016] Furthermore, the bottom ends of the second terminal and the first terminal are electrically connected to a first wire and a second wire, respectively. The first wire is connected to the positive terminal of the junction box, the second wire is connected to the second electrical connection component, and the first electrical connection component is connected to the negative terminal of the junction box through a third wire.

[0017] This invention provides an electromagnetic vibration table for an uncooled infrared core assembly employing multiple sensors. Compared with existing technologies, it offers the following advantages: 1. An electromagnetic vibration table for uncooled infrared core components using multiple sensors is provided. By setting up four sets of vibration testing mechanisms (low frequency, medium frequency, high frequency, and ultra-high frequency), vibration waves of different frequencies can be generated synchronously or alternately to simulate the complex operating conditions of uncooled infrared core components in real environments such as transportation bumps, mechanical shocks, and high-frequency vibrations. Simultaneously, vibration tests at different frequencies can be performed on multiple uncooled infrared core components, significantly improving testing efficiency. Among them, the low-frequency and medium-frequency vibration testing mechanisms can simulate low-frequency vibrations during transportation, the high-frequency vibration testing mechanism can simulate high-frequency noise interference during the operation of uncooled infrared core components, and the ultra-high frequency vibration testing mechanism can simulate the instantaneous impact conditions of uncooled infrared core components in extreme environments. Secondly, by driving the turntable to rotate 90 degrees every time, the station exchange of low-frequency, medium-frequency, high-frequency, and ultra-high-frequency testing mechanisms can be realized. This ensures that each mechanism completes a connection with the corresponding low-frequency vibration control component, medium-frequency vibration control component, high-frequency vibration control component, and ultra-high-frequency vibration control component. This allows each uncooled infrared core to undergo vibration testing in multiple modes, achieving full-band coverage testing and greatly improving the accuracy and reliability of the test results.

[0018] 2. An electromagnetic vibration table using an uncooled infrared core assembly with multiple sensors is employed. By setting up a multi-frequency vibration control mechanism, the length of the lifting column is adjusted by referring to the scale groove in the power control assembly, thereby controlling the total length of the power control assembly. This causes the drive gears at multiple positions to rotate at different angles under the drive of power control assemblies of different lengths, thereby driving the brushes at the corresponding positions to slide on the annular resistance wire. This achieves the effect of stepless current adjustment, that is, the low-frequency control assembly has a smaller current and a gentler vibration intensity, while the ultra-high-frequency control assembly has a larger current and a more intense vibration intensity, meeting the needs of different testing environments.

[0019] Secondly, when the four vibration testing mechanisms of low frequency, medium frequency, high frequency and ultra-high frequency are tested at a single station, the turntable is driven by a servo motor to rotate back and forth within a preset angle, so that the lifting column slides on the protrusion and groove of the drive unit, so as to achieve the purpose of the brush swinging rapidly within a small range of angles, and realize the effect of rapid change of current, so as to simulate the dynamic adjustment of the vibration waveform from low frequency to high frequency, thereby verifying the stability of the test piece in the instantaneously changing environment.

[0020] 3. An electromagnetic vibration table for uncooled infrared core components using multiple sensors is employed. By setting vibration and sound sensors, it can collect vibration waveform amplitude, frequency, and abnormal noise data in real time. By comparing with the benchmark data of qualified products, it can quickly identify whether the component has structural defects or performance abnormalities. If the vibration data deviation exceeds the threshold, it is judged as unqualified and requires further in-depth testing. Secondly, the control console integrates servo motor control, current adjustment, data acquisition and analysis functions to automate the testing process, reduce manual intervention, and enable testing under various vibration conditions, thereby improving testing efficiency.

[0021] 4. An electromagnetic vibration table for uncooled infrared core components using multiple sensors is employed. By setting vibration isolation pads, it can effectively absorb external vibrations, reduce the impact of resonance on multiple vibration testing mechanisms, and ensure the accuracy of test data. Secondly, the clamping plate in the test chamber is quickly locked through sliding grooves and fastening bolts, ensuring that the uncooled infrared core is fixed in position during vibration and avoiding test errors caused by loosening. In addition, the low-frequency, medium-frequency, high-frequency, and ultra-high-frequency testing mechanisms have the same structure, and the functional differences are only achieved by adjusting the length of the power control component, which is convenient to use and easy to mass-produce and maintain.

[0022] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the first overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the state structure of the test bench and control console removed in this invention; Figure 3 For the present invention Figure 2 A magnified structural diagram of part A in the diagram; Figure 4 This is a schematic diagram showing the exploded state structure of the multi-frequency vibration control mechanism, turntable, and low, medium, high, and ultra-high frequency vibration testing mechanisms of the present invention. Figure 5 This is a schematic diagram of the low-frequency vibration testing mechanism of the present invention; Figure 6 This is a schematic diagram of the driving unit structure of the present invention; Figure 7 This is a schematic diagram of the first state structure of the multi-frequency vibration control mechanism of the present invention; Figure 8 This is a schematic diagram of the second state structure of the multi-frequency vibration control mechanism of the present invention; Figure 9 This is a schematic diagram of the assembly structure of the low-frequency, medium-frequency, high-frequency and ultra-high-frequency vibration testing components of the present invention; Figure 10 This is a schematic diagram of the first state structure of the low-frequency vibration control component of the present invention; Figure 11 For the present invention Figure 10 A magnified structural diagram of part B in the diagram; Figure 12 This is a schematic diagram of the second state structure of the low-frequency vibration control component of the present invention; Figure 13 For the present invention Figure 12 A magnified structural diagram of part C in the diagram; Figure 14 This is a schematic diagram of the current control component structure of the present invention.

[0024] In the diagram: 1. Test bench; 2. Turntable; 3. Control console; 4. Low-frequency vibration testing mechanism; 41. Electromagnetic vibration table assembly; 42. Test chamber; 43. Clamping plate; 44. First metal spring; 45. Second metal spring; 46. Drive unit; 461. Wedge block; 462. Groove; 463. Protrusion; 47. Vibration sensor; 48. Sound sensor; 5. Medium-frequency vibration testing mechanism; 6. High-frequency vibration testing mechanism; 7. Ultra-high-frequency vibration testing mechanism; 8. L-shaped support arm; 9. Multi-frequency vibration control mechanism; 91. Mounting plate; 92. Low-frequency vibration control assembly; 921. Bearing seat; 922. First power connection assembly; 923. Second power connection assembly; 9231. Sleeve; 9232. First lifting column; 9233. Metal contact Head; 9234, First Spring; 924, Power Control Component; 9241, Bearing Sleeve; 9242, First Clearance Groove; 9243, Second Clearance Groove; 9244, Second Lifting Column; 9245, Locking Bolt; 9246, Scale Groove; 9247, Guide Rod; 9248, Second Spring; 9249, Rack; 925, Current Control Component; 9251, Insulating Board; 9252, Circular Resistance Wire; 9253, Drive Shaft; 9254, Gear; 9255, Conductive Metal Sleeve; 9256, Brush; 9257, First Terminal; 9258, Second Terminal; 93, Medium Frequency Vibration Control Component; 94, High Frequency Vibration Control Component; 95, Ultra-High Frequency Vibration Control Component; 96, Junction Box; 10, Vibration Isolation Pad. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] This invention provides three technical solutions: an electromagnetic vibration table for an uncooled infrared core assembly using multiple sensors, specifically including the following embodiments: like Figures 1 to 5 The first embodiment is shown: an electromagnetic vibration table for an uncooled infrared core assembly using multiple sensors, including a test platform 1 and a turntable 2 driven to rotate on top of the test platform 1 by a servo motor. A control console 3 for controlling the vibration testing process is also provided on one side of the test platform 1. The table also includes: Low-frequency vibration testing mechanism 4, medium-frequency vibration testing mechanism 5, high-frequency vibration testing mechanism 6 and ultra-high-frequency vibration testing mechanism 7 are evenly arranged on the top of turntable 2 for loading the uncooled infrared core component to be tested using multiple sensors. The low-frequency vibration testing mechanism 4, medium-frequency vibration testing mechanism 5, high-frequency vibration testing mechanism 6 and ultra-high-frequency vibration testing mechanism 7 can generate vibration waves of different frequencies at different testing stations, and can also generate rapidly changing vibration waves at a single testing station to simulate different application scenarios of uncooled infrared core components in real environments. The L-shaped support arm 8 is fixedly installed on the top side of the test bench 1. At the bottom of the L-shaped support arm 8 and directly above the turntable 2, there is a multi-frequency vibration control mechanism 9 for cooperating with the low-frequency vibration testing mechanism 4, the medium-frequency vibration testing mechanism 5, the high-frequency vibration testing mechanism 6 and the ultra-high-frequency vibration testing mechanism 7 to perform low-frequency vibration testing, medium-frequency vibration testing, high-frequency vibration testing and ultra-high-frequency vibration testing. The vibration frequency can be flexibly adjusted according to the testing requirements. Multiple vibration isolation pads 10 are evenly distributed on the top of the turntable 2 to reduce the impact of resonance on the low-frequency vibration testing mechanism 4, the medium-frequency vibration testing mechanism 5, the high-frequency vibration testing mechanism 6, and the ultra-high-frequency vibration testing mechanism 7. By setting up vibration isolation pads, external vibrations can be effectively absorbed, reducing the impact of resonance on multiple vibration testing mechanisms and ensuring the accuracy of test data.

[0027] In this embodiment, by setting up four sets of vibration testing mechanisms—low frequency, medium frequency, high frequency, and ultra-high frequency—vibration waves of different frequencies can be generated synchronously or alternately to simulate the complex operating conditions of the uncooled infrared core in real environments such as transportation bumps, mechanical shocks, and high-frequency vibrations. For example, the low-frequency and medium-frequency vibration testing mechanisms can simulate low-frequency vibrations during transportation, the high-frequency vibration testing mechanism can simulate high-frequency noise interference during the operation of the uncooled infrared core, and the ultra-high frequency vibration testing mechanism can simulate the instantaneous impact conditions of the uncooled infrared core in extreme environments. Secondly, by driving the turntable to rotate 90 degrees every time, the station exchange of low-frequency, medium-frequency, high-frequency, and ultra-high-frequency testing mechanisms can be realized. This ensures that each mechanism completes a connection with the corresponding low-frequency vibration control component, medium-frequency vibration control component, high-frequency vibration control component, and ultra-high-frequency vibration control component. This allows each uncooled infrared core to undergo vibration testing in multiple modes, achieving full-band coverage testing and greatly improving the accuracy and reliability of the test results.

[0028] like Figures 5 to 6The second embodiment is shown, which differs from the first embodiment in that the low-frequency vibration testing mechanism 4, the medium-frequency vibration testing mechanism 5, the high-frequency vibration testing mechanism 6, and the ultra-high-frequency vibration testing mechanism 7 have the same structure. The low-frequency vibration testing mechanism 4 includes an electromagnetic vibration table assembly 41 fixedly mounted on the top of the vibration isolation pad 10. The top of the electromagnetic vibration table assembly 41 has a test cavity 42 for placing the uncooled infrared core assembly with multiple sensors to be tested. Multiple sliding grooves are evenly provided around the bottom of the test cavity 42. A clamping plate 43 is slidably mounted in each sliding groove. The multiple clamping plates 43 are locked to the electromagnetic vibration table assembly 41 by fastening bolts. A support plate is also fixedly mounted on the side wall of the electromagnetic vibration table assembly 41. A first metal spring 44 and a second metal spring 45 for transmitting electrical energy to the multi-frequency vibration control mechanism 9 are fixedly mounted on the top two sides of the support plate, and a drive unit 46 is also provided on the top side of the support plate near the electromagnetic vibration table assembly 41.

[0029] The clamping plate 43 inside the test chamber 42 is quickly locked by the sliding groove and fastening bolts to ensure that the uncooled infrared core is fixed in position during vibration and avoid test errors caused by loosening. In addition, the low frequency, medium frequency, high frequency and ultra-high frequency test mechanisms have the same structure and only the function is different by adjusting the length of the power control component 924, which is convenient to use and easy to mass production and maintenance.

[0030] In this embodiment, the drive unit 46 includes a wedge block 461, and a horizontal bearing area is provided at the top center of the wedge block 461. A protrusion 463 and a groove 462 are respectively provided on both sides of the horizontal bearing area.

[0031] By setting up vibration sensor 47 and sound sensor 48, the amplitude, frequency, and abnormal noise data of vibration waveforms can be collected in real time. By comparing with the benchmark data of qualified products, it is possible to quickly identify whether the test piece has structural defects or performance abnormalities. If the vibration data deviation exceeds the threshold, it is judged as unqualified and further in-depth testing is required. Secondly, the control console integrates servo motor control, current adjustment, data acquisition and analysis functions to automate the testing process, reduce manual intervention, and enable testing under various vibration conditions, thereby improving testing efficiency.

[0032] like Figures 7 to 14The third embodiment is shown, which differs from the second embodiment in that: the multi-frequency vibration control mechanism 9 includes a mounting plate 91 fixedly disposed at one end of the L-shaped support arm 8. The outer wall of the mounting plate 91 is evenly provided with a low-frequency vibration control component 92, a medium-frequency vibration control component 93, a high-frequency vibration control component 94, and an ultra-high-frequency vibration control component 95. Furthermore, a junction box 96 for supplying electrical energy to the low-frequency vibration control component 92, the medium-frequency vibration control component 93, the high-frequency vibration control component 94, and the ultra-high-frequency vibration control component 95 is disposed at the bottom center of the mounting plate 91. The junction box 96 is connected to the power supply through wires.

[0033] In this embodiment, the low-frequency vibration control component 92 includes a support base 921 and a first power connection component 922 and a second power connection component 923 disposed on both sides inside the support base 921. An energy control component 924 is disposed inside the support base 921 and between the first power connection component 922 and the second power connection component 923. A current control component 925 for controlling the magnitude of the current is disposed inside the support base 921 and above the energy control component 924. The low-frequency vibration control component 92, the medium-frequency vibration control component 93, the high-frequency vibration control component 94, and the ultra-high-frequency vibration control component 95 have the same structure.

[0034] In this embodiment, the second power connection component 923 includes a sleeve 9231 fixedly disposed inside the bearing seat 921. A first lifting column 9232 is slidably disposed inside the sleeve 9231. A metal contact 9233 is fixedly disposed at the bottom end of the first lifting column 9232. A first spring 9234 is slidably disposed on the outer wall of the first lifting column 9232 and between the metal contact 9233 and the sleeve 9231. The second power connection component 923 has the same structure as the first power connection component 922.

[0035] In this embodiment, the power control component 924 includes a support sleeve 9241 that slides through the support base 921. The support sleeve 9241 has a first clearance groove 9242 and a second clearance groove 9243 respectively on its two side walls. A second lifting column 9244 is slidably disposed inside the support sleeve 9241. The second lifting column 9244 is locked in position with the support sleeve 9241 by a locking bolt 9245. The side wall of the support sleeve 9241 also has a scale groove 9246 for marking the position of the top of the second lifting column 9244. Guide rods 9247 are fixedly disposed on both sides of the outer wall of the support sleeve 9241 by a mounting bracket. The guide rods 9247 slide through the support base 921 and are fixedly disposed with baffles to limit the position of the bottom of the second lifting column 9244. A second spring 9248 is slidably disposed on the outer wall of the guide rods 9247 and located between the mounting bracket and the support base 921. A rack 9249 is fixedly disposed at the top of the support sleeve 9241. The bottom end of the second lifting column 9244 is equipped with a guide wheel for easy movement on the top of the wedge block 461.

[0036] In this embodiment, the current control component 925 includes an insulating plate 9251 fixedly disposed on the inner wall of the support 921. An annular resistance wire 9252 is fixedly disposed on the side wall of the insulating plate 9251, and a drive shaft 9253 is rotatably disposed on the side wall of the insulating plate 9251. A gear 9254 that meshes with a rack 9249 is fixedly disposed at one end of the drive shaft 9253 away from the insulating plate 9251. A conductive metal sleeve 9255 is fixedly sleeved on the outer wall of the insulating plate 9251. A brush 9256 is fixedly sleeved on one side of the outer wall of the conductive metal sleeve 9255. One end of the brush 9256 is electrically slidably connected to the outer wall of the annular resistance wire 9252. A first terminal 9257 is rotatably sleeved on one side of the outer wall of the conductive metal sleeve 9255. The first terminal 9257 is fixedly disposed on the side wall of the insulating plate 9251. A second terminal 9258 is fixedly disposed at one end of the annular resistance wire 9252.

[0037] By setting up a multi-frequency vibration control mechanism 9, the length of the second lifting column 9244 is adjusted by referring to the scale groove 9246 in the power control component 924, thereby controlling the total length of the power control component 924. This causes the gears 9254 at multiple positions to rotate at different angles under the drive of power control components of different lengths, thereby driving the brushes 9256 at the corresponding positions to slide on the annular resistance wire 9252. This achieves the effect of stepless current adjustment, that is, the low-frequency vibration control component has a smaller current and a gentler vibration force, while the ultra-high-frequency vibration control component has a larger current and a more intense vibration force, meeting the needs of different testing environments.

[0038] Secondly, when the four vibration testing mechanisms of low frequency, medium frequency, high frequency and ultra-high frequency are tested at a single station, the turntable 2 is driven by a servo motor to reciprocate within a preset angle, so that the second lifting column 9244 slides on the protrusion 463 and groove 462 of the drive unit 46, so that the brush 9256 swings rapidly within a small range of angles, thereby achieving the effect of rapid change of current, to simulate the dynamic adjustment of the vibration waveform from low frequency to high frequency, so as to verify the stability of the test piece in the instantaneously changing environment.

[0039] In this embodiment, the bottom ends of the second terminal 9258 and the first terminal 9257 are electrically connected to a first wire and a second wire, respectively. The first wire is connected to the positive terminal of the junction box 96, and the second wire is connected to the second power connection assembly 923. The first power connection assembly 922 is connected to the negative terminal of the junction box 96 via a third wire. The metal contact 9233 in the first power connection assembly 922 is electrically connected to the negative terminal of the junction box 96 via the third wire, and the metal contact 9233 in the second power connection assembly 923 is electrically connected to the first terminal 9257 via the second wire. In use, first place the uncooled infrared core assembly with multiple sensors at the bottom of the test chamber 42, and manually push the clamping plates 43 at multiple positions to fit tightly against the side wall of the uncooled infrared core assembly with multiple sensors. Then, use the fastening bolts to lock the position of the clamping plates 43, so that the position of the uncooled infrared core assembly with multiple sensors is fixed.

[0040] The low-frequency vibration control component 92, medium-frequency vibration control component 93, high-frequency vibration control component 94, and ultra-high-frequency vibration control component 95 in the multi-frequency vibration control mechanism 9 are energized by the control console 3. For example, taking the current passing through the low-frequency vibration control component 92 as an example, the current enters the metal contacts 9233 in the first power connection component 922 and the second power connection component 923 through the positive and negative terminals of the junction box 96, respectively. Since in the initial position, the metal contacts 9233 in the first power connection component 922 and the second power connection component 923 are in contact with the first metal spring 44 and the second metal spring 45 in the low-frequency vibration test mechanism 4, the medium-frequency vibration test mechanism 5, the high-frequency vibration test mechanism 6, or the ultra-high-frequency vibration test mechanism 7, respectively, the current then forms a closed loop through the two metal contacts 9233 and the internal circuit of the electromagnetic vibration table assembly 41. After the electromagnetic vibration table assembly 41 is energized, it vibrates to drive the uncooled infrared core assembly with multiple sensors to vibrate. Since the position of the scale groove 9246 corresponding to the end of the power control component 924 in the low-frequency vibration control component 92 is determined, the total length of the power control component 924 is determined. At this time, when the bottom of the power control component 924 is not subjected to external force, its distance from the top of the turntable 2 is a fixed value. After the total length of the power control component 924 is pre-adjusted, it can be pushed upward by the drive unit 46 a preset distance.

[0041] Similarly, the position of the scale line of the scale groove 9246 corresponding to the top of the second lifting column 9244 in the medium frequency vibration control component 93, high frequency vibration control component 94 and ultra-high frequency vibration control component 95 has also been determined, and the total length of the power control component 924 in the low frequency vibration control component 92, medium frequency vibration control component 93, high frequency vibration control component 94 and ultra-high frequency vibration control component 95 increases sequentially. Since the height of the drive unit 46 in the low-frequency vibration testing mechanism 4, the medium-frequency vibration testing mechanism 5, the high-frequency vibration testing mechanism 6, and the ultra-high-frequency vibration testing mechanism 7 is always a fixed value, when the total length of the power control component 924 in the low-frequency vibration control component 92, the medium-frequency vibration control component 93, the high-frequency vibration control component 94, and the ultra-high-frequency vibration control component 95 increases sequentially, the height of the power control component 924 in the low-frequency vibration control component 92, the medium-frequency vibration control component 93, the high-frequency vibration control component 94, and the ultra-high-frequency vibration control component 95 pushed upward by the drive unit 46 at the corresponding position increases sequentially. Therefore, the height of the low-frequency vibration control component 92, the medium-frequency vibration control component 93, the high-frequency vibration control component 94, and the ultra-high-frequency vibration control component 95 increases sequentially. In the vibration control component 95, the rack 9249 at the top of the power control component 924 drives the gear 9254 to rotate at an angle that gradually increases. The brush 9256 gradually moves closer to the second terminal 9258. That is, the length of the annular resistance wire 9252 in the low-frequency vibration control component 92, medium-frequency vibration control component 93, high-frequency vibration control component 94 and ultra-high-frequency vibration control component 95 gradually decreases, and the current gradually increases. This causes the current flowing into the low-frequency vibration testing mechanism 4, medium-frequency vibration testing mechanism 5, high-frequency vibration testing mechanism 6 and ultra-high-frequency vibration testing mechanism 7 to gradually increase. In other words, the vibration intensity of the low-frequency vibration testing mechanism 4, medium-frequency vibration testing mechanism 5, high-frequency vibration testing mechanism 6 and ultra-high-frequency vibration testing mechanism 7 gradually increases.

[0042] Next, after the low-frequency vibration testing mechanism 4, the medium-frequency vibration testing mechanism 5, the high-frequency vibration testing mechanism 6, and the ultra-high-frequency vibration testing mechanism 7 have reached a certain testing time at one of their testing positions, the servo motors are controlled by the control console 3 to rotate 90 degrees each time, thus exchanging the positions of the low-frequency vibration testing mechanism 4, the medium-frequency vibration testing mechanism 5, the high-frequency vibration testing mechanism 6, and the ultra-high-frequency vibration testing mechanism 7. Throughout the entire testing process, the low-frequency vibration testing mechanism 4, the medium-frequency vibration testing mechanism 5, the high-frequency vibration testing mechanism 6, and the ultra-high-frequency vibration testing mechanism 7 interact with the low-frequency vibration control component 92 and the medium-frequency vibration control component, respectively. 93. The high-frequency vibration control component 94 and the ultra-high-frequency vibration control component 95 complete one connection. After each connection, a preset test time is maintained. During this process, the vibration sensor 47 and the sound sensor 48 send the collected data to the terminal device for analysis in real time. By comparing the data collected by the vibration sensor 47 and the sound sensor 48 under the qualified uncooled infrared core component with the data collected by the current test product, if there is a large difference in the data, it indicates that the product is abnormal and further in-depth testing is required. If there is no significant difference between the current test data and the data collected by the qualified product, it indicates that the product is qualified.

[0043] For example, after the low-frequency vibration testing mechanism 4 is connected to the low-frequency vibration control component 92, during the subsequent preset test time, the servo motor of the control console 3 drives the control console 3 to reciprocate within a preset angle. While ensuring that the two metal contacts 9233 in the low-frequency vibration control component 92, medium-frequency vibration control component 93, high-frequency vibration control component 94, and ultra-high-frequency vibration control component 95 are always in contact with the first metal spring 44 and the drive unit 46 at the corresponding positions, the bottom end of the second lifting column 9244 in the low-frequency vibration control component 92, medium-frequency vibration control component 93, high-frequency vibration control component 94, and ultra-high-frequency vibration control component 95 reciprocates along the top area of ​​the drive unit 46. The second lifting column 9244 moves up and down reciprocally under the action of multiple grooves 462 and protrusions 463, while the brush 9256 at the corresponding position slides back and forth along the outer wall of the annular resistance wire 9252. The current in the electromagnetic vibration table component 41 changes rapidly in a short time, causing the vibration intensity of the electromagnetic vibration table component 41 to change rapidly in a short time.

[0044] After the test is completed, the position lock of the clamping plate 43 on the uncooled infrared core components with multiple sensors can be released and the plate can be removed.

[0045] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An electromagnetic vibration table for an uncooled infrared core assembly employing multiple sensors, comprising a test platform and a turntable driven to rotate on top of the test platform by a servo motor, wherein a control console for controlling the vibration testing process is also provided on one side of the test platform, characterized in that, Also includes: Low-frequency vibration testing mechanism, medium-frequency vibration testing mechanism, high-frequency vibration testing mechanism and ultra-high-frequency vibration testing mechanism are evenly arranged on the top of the turntable for loading the uncooled infrared core component to be tested using multiple sensors. The low-frequency vibration testing mechanism, medium-frequency vibration testing mechanism, high-frequency vibration testing mechanism and ultra-high-frequency vibration testing mechanism can generate vibration waves of different frequencies at different testing stations, or generate rapidly changing vibration waves at a single testing station to simulate different application scenarios of uncooled infrared core components in real environment; An L-shaped support arm is fixedly installed on one side of the top of the test bench. At the bottom of the L-shaped support arm and directly above the turntable, there is a multi-frequency vibration control mechanism for cooperating with the low-frequency vibration testing mechanism, medium-frequency vibration testing mechanism, high-frequency vibration testing mechanism and ultra-high-frequency vibration testing mechanism to perform low-frequency vibration testing, medium-frequency vibration testing, high-frequency vibration testing and ultra-high-frequency vibration testing, and the vibration frequency can be flexibly adjusted according to the testing requirements. Multiple vibration isolation pads are evenly distributed on the top of the turntable to reduce the impact of resonance on the low-frequency vibration testing mechanism, the medium-frequency vibration testing mechanism, the high-frequency vibration testing mechanism, and the ultra-high-frequency vibration testing mechanism.

2. The electromagnetic vibration table for an uncooled infrared core assembly employing multiple sensors as described in claim 1, characterized in that: The low-frequency vibration testing mechanism, medium-frequency vibration testing mechanism, high-frequency vibration testing mechanism, and ultra-high-frequency vibration testing mechanism have the same structure. The low-frequency vibration testing mechanism includes an electromagnetic vibration table assembly fixedly mounted on the top of the vibration isolation pad. The top of the electromagnetic vibration table assembly has a test cavity for placing the uncooled infrared core assembly with multiple sensors to be tested. Multiple sliding grooves are evenly distributed around the bottom of the test cavity. A clamping plate is slidably mounted in each of the sliding grooves. The multiple clamping plates are locked to the electromagnetic vibration table assembly by fastening bolts. A support plate is also fixedly mounted on the side wall of the electromagnetic vibration table assembly. A first metal spring and a second metal spring for transmitting electrical energy to the multi-frequency vibration control mechanism are fixedly mounted on the top two sides of the support plate, respectively. A drive unit is also provided on the top side of the support plate near the electromagnetic vibration table assembly.

3. The electromagnetic vibration table for an uncooled infrared core assembly employing multiple sensors as described in claim 2, characterized in that: The drive unit includes a wedge block, and a horizontal bearing area is provided at the top center of the wedge block. A protrusion and a groove are respectively provided on both sides of the horizontal bearing area.

4. The electromagnetic vibration table for an uncooled infrared core assembly employing multiple sensors according to claim 1, characterized in that: The multi-frequency vibration control mechanism includes a mounting plate fixedly installed at one end of an L-shaped support arm. Low-frequency vibration control components, medium-frequency vibration control components, high-frequency vibration control components, and ultra-high-frequency vibration control components are evenly arranged around the outer wall of the mounting plate. A junction box for supplying electrical energy to the low-frequency vibration control components, medium-frequency vibration control components, high-frequency vibration control components, and ultra-high-frequency vibration control components is provided at the bottom center of the mounting plate. The junction box is connected to the power supply through wires.

5. The electromagnetic vibration table for an uncooled infrared core assembly employing multiple sensors according to claim 4, characterized in that: The low-frequency vibration control component includes a support base and a first power connection component and a second power connection component disposed on both sides inside the support base. An energy control component is disposed inside the support base and between the first and second power connection components. A current control component for controlling the magnitude of the current is disposed inside the support base and above the energy control component. The low-frequency vibration control component, the medium-frequency vibration control component, the high-frequency vibration control component, and the ultra-high-frequency vibration control component have the same structure.

6. The electromagnetic vibration table for an uncooled infrared core assembly employing multiple sensors according to claim 5, characterized in that: The second power connection assembly includes a sleeve fixedly installed inside the bearing seat. A first lifting column is slidably installed inside the sleeve. A metal contact is fixedly installed at the bottom end of the first lifting column. A first spring is slidably installed on the outer wall of the first lifting column between the metal contact and the sleeve. The second power connection assembly has the same structure as the first power connection assembly.

7. The electromagnetic vibration table for an uncooled infrared core assembly employing multiple sensors according to claim 5, characterized in that: The power control component includes a bearing sleeve that slides through the bearing seat. The bearing sleeve has a first clearance groove and a second clearance groove on its two side walls. A second lifting column is slidably disposed inside the bearing sleeve. The second lifting column is locked in position with the bearing sleeve by locking bolts. The side wall of the bearing sleeve also has a scale groove for marking the position of the top of the second lifting column. Guide rods are fixedly disposed on both sides of the outer wall of the bearing sleeve by mounting brackets. The guide rods slide through the bearing seat and are fixedly disposed with baffles to limit the position of the bottom of the second lifting column. A second spring is slidably disposed on the outer wall of the guide rod between the mounting bracket and the bearing seat. A rack is fixedly disposed at the top of the bearing sleeve.

8. The electromagnetic vibration table for an uncooled infrared core assembly employing multiple sensors according to claim 7, characterized in that: The current control assembly includes an insulating plate fixedly mounted on the inner wall of the bearing seat. An annular resistance wire is fixedly mounted on the side wall of the insulating plate, and a drive shaft is rotatably mounted on the side wall of the insulating plate. A gear that meshes with a rack is fixedly mounted at the end of the drive shaft away from the insulating plate. A conductive metal sleeve is fixedly mounted on the outer wall of the insulating plate. A brush is fixedly mounted on one side of the outer wall of the conductive metal sleeve. One end of the brush is electrically slidably connected to the outer wall of the annular resistance wire. A first terminal is rotatably mounted on one side of the outer wall of the conductive metal sleeve. The first terminal is fixedly mounted on the side wall of the insulating plate. A second terminal is fixedly mounted at one end of the annular resistance wire.

9. The electromagnetic vibration table for an uncooled infrared core assembly employing multiple sensors according to claim 8, characterized in that: The bottom ends of the second terminal and the first terminal are electrically connected to a first wire and a second wire, respectively. The first wire is connected to the positive terminal of the junction box, the second wire is connected to the second electrical connection component, and the first electrical connection component is connected to the negative terminal of the junction box through a third wire.

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