Electromagnetic induction device for lunar soil sample transfer position and detection method thereof

Abstract

The application provides an electromagnetic induction device for a lunar soil sample transfer position and a detection method thereof, and belongs to the technical field of lunar soil sample processing. The device can confirm whether a sample enters an analysis device, and solves the problem that the existing device cannot confirm whether a sample enters an analysis device. The device comprises a sample receiving hopper, an induction coil, a magnetic conductor, a metal sampling sheet, a reflecting screen and a ceramic base. The induction coil is installed at the bottom of the sample receiving hopper. The magnetic conductor is arranged below a sample outlet of the sample receiving hopper. The magnetic conductor is installed on the metal sampling sheet. The metal sampling sheet is installed on the reflecting screen. The reflecting screen is installed on the ceramic base. The ceramic base is installed on a fixing frame. The fixing frame is connected with a rover through bolts. A sampling mechanism is installed on a mechanical arm of the rover. The device is mainly used for lunar soil sampling.

Description

Technical Field

[0001] This invention belongs to the field of lunar soil sample processing technology, and in particular relates to an electromagnetic induction device and its detection method for the transfer position of lunar soil samples. Background Technology

[0002] With continuous technological updates and iterations, the next phase of the lunar exploration mission plans to conduct in-situ analysis of lunar soil samples.

[0003] Unlike sampling missions, in-situ analysis does not require bringing samples back to Earth but can be performed directly in orbit. Therefore, it involves a method for heating lunar soil samples to extract volatiles, which can process and extract lunar soil samples obtained in orbit. The rover will collect lunar soil samples in the south polar region of the moon and use its onboard sample analyzer to heat the lunar soil and detect volatiles. After the analysis is completed, the processed sample is discarded and the rover continues to the next destination for sample collection and volatile detection. However, the existing device cannot confirm whether the sample has entered the analysis device. Summary of the Invention

[0004] In view of this, the present invention aims to provide an electromagnetic induction device and its detection method for the transfer position of lunar soil samples, so as to solve the problem that existing devices cannot confirm whether the sample has entered the analysis device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An electromagnetic induction device for transferring lunar soil samples includes a sample receiving hopper, an induction coil, a magnetic conductor, a metal sampling plate, a reflective screen, and a ceramic base. The induction coil is installed at the bottom of the sample receiving hopper, the magnetic conductor is located below the sample outlet of the sample receiving hopper, the magnetic conductor is installed on the metal sampling plate, the metal sampling plate is installed on the reflective screen, the reflective screen is installed on the ceramic base, and the ceramic base is installed on a fixed frame. The fixed frame is connected to a patrol device by bolts, and a sampling mechanism is installed on the robotic arm of the patrol device.

[0007] Furthermore, a sealing ring is provided between the fixing frame and the ceramic base.

[0008] Furthermore, floating tension springs are provided on both sides of the sample receiving hopper, with an inner floating tension spring pin and an outer floating tension spring pin respectively on each side. Both the inner and outer floating tension spring pins are installed on the outside of the sample receiving hopper.

[0009] Furthermore, the sample receiving hopper is mounted on the inspection device via a frame.

[0010] Furthermore, the sampling mechanism includes a motor shaft, a lead screw, a slider, a sampling plate, a motor housing, a first ratchet, a second ratchet, an output sleeve, and a sampling tube. The motor housing is mounted on the robotic arm, the motor shaft is mounted inside the motor housing, the lead screw is connected to the motor shaft, the motor shaft is mounted on the motor, the slider is connected to the lead screw, the sampling plate is mounted inside the sampling tube, the first ratchet is located on the inner surface of the motor housing, the second ratchet is located on the outer surface of the lead screw, the output sleeve is fitted onto the outside of the lead screw, the outer end of the second ratchet contacts the inner end of the output sleeve, and a bearing is mounted on the outer side of the output sleeve.

[0011] Furthermore, the protrusion on the outer side of the slider engages with the groove inside the sampling tube.

[0012] Furthermore, the sampling pieces are provided in multiple quantities.

[0013] Furthermore, the protrusions on both sides of the sampling plate are connected to the grooves on both sides of the sampling tube.

[0014] Furthermore, the sampling piece includes a sampling piece cover and a sampling piece bottom that are connected to each other, and the sampling piece cover and the sampling piece bottom are connected by a fixing pin.

[0015] Furthermore, a method for detecting the transfer location of a lunar soil sample using an electromagnetic induction device includes the following steps:

[0016] Step 1: When collecting lunar soil samples, the robotic arm presses the sampling tube to the ground, the motor rotates clockwise, and the motor shaft drives the lead screw to rotate. Under the action of the second ratchet, the output shaft sleeve rotates, which in turn drives the sampling tube to rotate and collect lunar soil samples.

[0017] Step 2: After sampling is completed, the robotic arm moves the sampling tube until the end of the sampling tube contacts the bottom of the sampling hopper. The motor rotates counterclockwise. Due to the action of the first ratchet, the output shaft sleeve and the sampling tube remain stationary. The lead screw rotates, causing the slider to push the sampling plate away from the sampling tube and fall onto the reflective screen.

[0018] Step 3: While the sampling tube is dispensing the sample, an induction coil is used to detect whether a sample has fallen to ensure that the sampling is completed.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. This invention solves the problem that existing devices cannot confirm whether a sample has entered the analysis device by using an electromagnetic induction detection method, thereby realizing sample position monitoring and ensuring that the extraction of volatile components from heated samples can be completed.

[0021] 2. The floating spring built into this invention can adapt to the sampling position of the sampling tube and adjust the sampling state, giving the device a certain degree of fault tolerance.

[0022] 3. The sampling tube is made of metal and can collect a quantitative amount of lunar soil sample by rotating and pressing down on the sampling tube. Attached Figure Description

[0023] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0024] Figure 1 This is a schematic diagram of the sample receiving mechanism described in this invention;

[0025] Figure 2 This is a schematic diagram of the sampling tube described in this invention. Figure 1 ;

[0026] Figure 3 This is a schematic diagram of the sampling tube described in this invention. Figure 2 ;

[0027] Figure 4 This is a schematic diagram of the sampling tube described in this invention. Figure 3 ;

[0028] Figure 5 This is a schematic diagram of the circuit principle described in this invention;

[0029] Figure 6 This is a schematic diagram of the sampling sheet structure described in this invention.

[0030] 1-Sample receiving hopper, 2-Induction coil, 3-Magnetic conductor, 4-Sampling plate, 5-Reflector screen, 6-Ceramic base, 7-Bolt, 8-Inner floating tension spring pin, 9-Floating tension spring, 10-Outer floating tension spring pin, 11-Frame, 12-Sealing ring, 13-Fixed bracket, 14-Motor shaft, 15-Lead screw, 16-Slider, 17-Sampling plate, 18-Motor housing, 19-First ratchet, 20-Second ratchet, 21-Output shaft sleeve, 22-Sampling tube, 23-Bearing, 24-Fixed pin, 25-Sampling plate cover, 26-Sampling plate bottom. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other, and the described embodiments are only some embodiments of the present invention, not all embodiments.

[0032] See Figure 1-6This embodiment describes an electromagnetic induction device for transferring lunar soil samples, comprising a sample receiving hopper 1, an induction coil 2, a magnetic conductor 3, a metal sampling plate 4, a reflective screen 5, and a ceramic base 6. The induction coil 2 is installed at the bottom of the sample receiving hopper 1. The magnetic conductor 3 is positioned below the sample outlet of the sample receiving hopper 1. The magnetic conductor 3 is mounted on the metal sampling plate 4. The metal sampling plate 4 is mounted on the reflective screen 5. The reflective screen 5 is mounted on the ceramic base 6. The ceramic base 6 is mounted on a fixed frame 13. The fixed frame 13 is connected to a patrol device via bolts 7. A sampling mechanism is installed on the robotic arm of the patrol device. A sealing ring 12 is provided between the fixed frame 13 and the ceramic base 6. The sample receiving hopper 1 is mounted on the patrol device via a frame 11.

[0033] During operation, lunar soil is collected by pressing the sampling mechanism against the ground. After sampling, the end of the robotic arm drives the sampling mechanism to contact the bottom of the sample receiving hopper 1. The sample then detaches from the sampling mechanism and falls onto the reflective screen 5 below. Before the sample falls, a square wave signal of a certain frequency is input to the induction coil 2. With the coil's own inductance and the series capacitor in the circuit, a resonance phenomenon is generated inside the coil. At the same time, a pulse detection port is connected to the end of the coil to accumulate the number of square waves over a certain period of time. Since the time of the square wave format is known, the frequency of the coil can be calculated. This device, through electromagnetic induction detection, can solve the problem that existing devices cannot confirm whether the sample has entered the analysis device, thereby realizing sample position monitoring and ensuring that the extraction of volatile components from the sample through heating can be completed.

[0034] Furthermore, the sampling mechanism includes a motor shaft 14, a lead screw 15, a slider 16, a sampling plate 17, a motor housing 18, a first ratchet 19, a second ratchet 20, an output shaft sleeve 21, and a sampling tube 22. The motor housing 18 is mounted on the robotic arm, the motor shaft 14 is mounted inside the motor housing 18, the lead screw 15 is connected to the motor shaft 14, the motor shaft 14 is mounted on the motor, the slider 16 is connected to the lead screw 15, the sampling plate 17 is mounted inside the sampling tube 22, and the first ratchet 19 is located in the motor housing 18. On the inner surface, the second ratchet 20 is disposed on the outer surface of the lead screw 15. The output bushing 21 is connected to the sampling tube 22. The output bushing 21 is sleeved on the outside of the lead screw 15. The outer end of the second ratchet 20 contacts the inner end of the output bushing 21. A bearing 23 is installed on the outer side of the output bushing 21. There are multiple sampling plates 17. In this embodiment, 35 sampling plates 17 are used as an example. The sampling plate 17 includes a sampling plate cover 25 and a sampling plate bottom 26 that are connected to each other. The sampling plate cover 25 and the sampling plate bottom 26 are connected by a fixing pin 24.

[0035] During lunar soil sample collection, the robotic arm presses the sampling tube 22 to the ground. The motor rotates clockwise, and the motor shaft 14 drives the lead screw 15 to rotate clockwise. Due to the transmission action of the second ratchet 20, the lead screw 15 drives the output sleeve 21 to rotate. Since the output sleeve 21 is connected to the sampling tube 22, the lead screw 15 and the sampling tube 22 rotate at the same speed, the slider 16 does not move relative to each other, and the sampling piece 17 inside the tube remains stationary. The end of the robotic arm is fixed to the motor housing 18, driving the motor and the sampling tube 22 to press down on the lunar surface, and then collect lunar soil. After sampling, the robotic arm drives the sampling tube 22 to contact the bottom of the sample receiving hopper 1, and then the motor rotates counterclockwise. Because the motor housing 18 locks the first ratchet 19 during counterclockwise rotation, the output sleeve 21 and the motor housing 18 remain stationary, and only the lead screw 15 rotates. At this time, the lead screw... The slider 16 on 15 pushes the sampling plate 17 forward. The sampling plate 17 detaches from the sampling tube 22, passes through the induction coil 2 at the bottom of the receiving hopper 1, and falls onto the reflective screen 5. When current passes through the loop coil, an electromagnetic field is formed around it. Under normal circumstances, there is no external interference to the receiving part of the device, the circuit oscillation frequency remains constant, and the number of pulses measured per unit time period remains basically unchanged. When the sampling tube 22 ejects the plate, the metal shell of the sampling plate 17 cuts the magnetic flux lines, which will cause a change in the inductance of the loop coil circuit. At the same time, eddy currents are induced in the metal sampling plate. The eddy currents generate an electromagnetic field that is coupled to the loop but in the opposite direction, i.e., mutual inductance. This causes a change in the oscillation frequency of the eddy circuit, so that the number of pulses measured per unit time period also changes accordingly. As long as this change signal is detected, it can be detected whether the sampling plate 17 has passed. However, the shape of the sampling chip 17 is not uniform, so the number of pulses measured per unit time period changes when it passes through the loop coil. Therefore, when the received pulse changes rapidly per unit time period, it is considered that the sampling tube 22 has completed the reception of the sampling chip 17.

[0036] Furthermore, floating tension springs 9 are provided on both sides of the sample receiving hopper 1. The two sides of the floating tension springs 9 are respectively connected to the inner floating tension spring pin 8 and the outer floating tension spring pin 10. The inner floating tension spring pin 8 and the outer floating tension spring pin 10 are both installed on the outside of the sample receiving hopper 1. The built-in floating tension springs 9 will adapt to the sampling position of the sampling tube 22 and adjust the sampling posture, so that the device has a certain fault tolerance.

[0037] Furthermore, the protrusion on the outer side of the slider 16 engages with the groove inside the sampling tube 22, preventing the slider 16 from rotating. The protrusions on both sides of the sampling piece 17 engage with the grooves on both sides inside the sampling tube 22, allowing for rotation during sampling.

[0038] Furthermore, the sampling piece 17 includes a sampling piece cover 25 and a sampling piece bottom 26 connected to each other, and the sampling piece cover 25 and the sampling piece bottom 26 are connected by a fixing pin 24.

[0039] Furthermore, a method for detecting the transfer location of a lunar soil sample using an electromagnetic induction device includes the following steps:

[0040] Step 1: When collecting lunar soil samples, the robotic arm presses the sampling tube 22 into the ground, the motor rotates clockwise, and the motor shaft 14 drives the lead screw 15 to rotate. Under the action of the second ratchet 20, the output shaft sleeve 21 rotates, and then the sampling tube 22 rotates to collect lunar soil samples.

[0041] Step 2: After sampling is completed, the robotic arm moves the sampling tube 22 until the end of the sampling tube 22 contacts the bottom of the sample receiving hopper 1. The motor rotates counterclockwise. Due to the action of the first ratchet 19, the output shaft sleeve 21 and the sampling tube 22 remain stationary. The lead screw 15 rotates, causing the slider 16 to push the sampling piece 17 away from the sampling tube 22 and fall onto the reflective screen 5.

[0042] Step 3: While the sampling tube 22 is dispensing the sample, the induction coil 2 is used to detect whether the sampling piece 17 has fallen to ensure that the sampling is completed.

[0043] The embodiments of the present invention disclosed above are merely illustrative of the invention. These embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention.

Claims

1. An electromagnetic induction device for determining the transfer position of lunar soil samples, characterized in that: The device includes a sample receiving hopper (1), an induction coil (2), a magnetic conductor (3), a metal sampling plate (4), a reflective screen (5), and a ceramic base (6). The induction coil (2) is installed at the bottom of the sample receiving hopper (1). The magnetic conductor (3) is located below the sample outlet of the sample receiving hopper (1). The magnetic conductor (3) is installed on the metal sampling plate (4). The metal sampling plate (4) is installed on the reflective screen (5). The reflective screen (5) is installed on the ceramic base (6). The ceramic base (6) is installed on a fixed frame (13). The fixed frame (13) is connected to the inspection device by bolts (7). The mechanical arm of the inspection device is equipped with a sampling mechanism, which includes a motor shaft (14), a lead screw (15), a slider (16), a sampling plate (17), a motor housing (18), a first ratchet (19), and a second ratchet. (20), output bushing (21) and sampling tube (22), the motor housing (18) is mounted on the robotic arm, the motor shaft (14) is mounted inside the motor housing (18), the lead screw (15) is connected to the motor shaft (14), the motor shaft (14) is mounted on the motor, the slider (16) is connected to the lead screw (15), the sampling plate (17) is mounted inside the sampling tube (22), the first ratchet (19) is set on the inner surface of the motor housing (18), the second ratchet (20) is set on the outer surface of the lead screw (15), the output bushing (21) is connected to the sampling tube (22), the output bushing (21) is sleeved on the outside of the lead screw (15), the outer end of the second ratchet (20) is in contact with the inner end of the output bushing (21), and a bearing (23) is installed on the outer side of the output bushing (21).

2. The electromagnetic induction device for determining the transfer position of a lunar soil sample according to claim 1, characterized in that: A sealing ring (12) is provided between the fixing frame (13) and the ceramic base (6).

3. The electromagnetic induction device for determining the transfer position of a lunar soil sample according to claim 1, characterized in that: The sample receiving hopper (1) is provided with floating tension springs (9) on both sides. The two sides of the floating tension springs (9) are respectively connected to the inner floating tension spring pin (8) and the outer floating tension spring pin (10). The inner floating tension spring pin (8) and the outer floating tension spring pin (10) are both installed on the outside of the sample receiving hopper (1).

4. The electromagnetic induction device for determining the transfer position of a lunar soil sample according to claim 1, characterized in that: The sample receiving hopper (1) is mounted on the inspection device via a frame (11).

5. The electromagnetic induction device for determining the transfer position of a lunar soil sample according to claim 1, characterized in that: The protrusion on the outside of the slider (16) engages with the groove inside the sampling tube (22).

6. The electromagnetic induction device for determining the transfer position of a lunar soil sample according to claim 1, characterized in that: The sampling piece (17) has multiple parts.

7. The electromagnetic induction device for determining the transfer position of a lunar soil sample according to claim 6, characterized in that: The protrusions on both sides of the sampling piece (17) are connected to the grooves on both sides of the sampling tube (22).

8. The electromagnetic induction device for determining the transfer position of a lunar soil sample according to claim 6, characterized in that: The sampling piece (17) includes a sampling piece cover (25) and a sampling piece bottom (26) connected to each other, and the sampling piece cover (25) and the sampling piece bottom (26) are connected by a fixing pin (24).

9. A method for detecting the transfer location of a lunar soil sample using an electromagnetic induction device as described in claim 1, characterized in that: It includes the following steps: Step 1: When collecting lunar soil samples, the robotic arm presses the sampling tube (22) into the ground, the motor rotates clockwise, and drives the lead screw (15) to rotate through the motor shaft (14). Under the action of the second ratchet (20), the output shaft sleeve (21) rotates, and then drives the sampling tube (22) to rotate to sample the lunar soil. Step 2: After sampling is completed, the robotic arm moves the sampling tube (22) until the end of the sampling tube (22) contacts the bottom of the sample receiving hopper (1). The motor rotates counterclockwise. Due to the action of the first ratchet (19), the output shaft sleeve (21) and the sampling tube (22) remain stationary. The lead screw (15) rotates, causing the slider (16) to push the sampling piece (17) away from the sampling tube (22) and fall onto the reflective screen (5). Step 3: While the sampling tube (22) is dispensing the sample, the induction coil (2) is used to detect whether a sampling piece (17) has fallen to ensure that the sampling is completed.

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