A polyphase detection apparatus

Abstract

The utility model relates to a kind of multiphase detection devices for detecting the composition of fluid sample, including detection unit, loading unit and cover, the loading unit is set on the detection unit, the sample is installed in the loading unit, the cover is covered on the sample surface inside the loading unit;The detection unit continuously transmits detection signal to sample through loading unit bottom, and receives the composition signal formed by the reflection after the transmission sample of the detection signal, while analyzing composition signal obtains the composition information of sample.The multiphase detection device of the utility model can increase the adaptation of module to fluid detection function, while reducing detection error, improving detection efficiency, reducing sample loss, reducing detection cost.

Description

Technical Field

[0001] This utility model relates to the field of near-infrared detection, and in particular to a multiphase detection device. Background Technology

[0002] With the continuous development of materials science, production often involves samples of various materials. To ensure production quality, sample purity is crucial, making sample composition detection paramount. Among these techniques, using laser, near-infrared, and ultrasonic signals for sample composition detection is common and widely applied in chemistry, materials science, biology, and medicine. In intelligent production processes in food, pharmaceutical, and feed manufacturing, multiphase detection devices are used to measure various gaseous, liquid, and solid fluid samples, obtaining information such as mixing uniformity, content uniformity, and moisture content.

[0003] Please see Figure 1 The existing multiphase detection device includes a detection unit 1 and a loading unit 2, with the loading unit 2 disposed inside the detection unit 1, and the sample 3 loaded in the loading unit 2. The detection unit 1 includes a housing 10, an emitter 11, a detector 13, and a loading window 14; the sample 3 is placed into the loading unit 2 through an opening 21, and the loading unit 2 is placed into the detection unit 1 through the loading window 14; the emitter 11 continuously emits a detection signal, which is transmitted through the sample 3 in the loading unit 2 to form a component signal containing the component information of the sample 3; the detector 13 receives the component signal and analyzes it to obtain the component information of the sample.

[0004] However, existing multiphase detection devices have low detection accuracy when used to detect samples, and the operation process is complicated when detecting different samples, resulting in poor practical application performance. Utility Model Content

[0005] Based on this, the purpose of this utility model is to provide a multiphase detection device that can increase the module's adaptability to fluid detection functions, while reducing detection errors, improving detection efficiency, reducing sample loss, and reducing detection costs.

[0006] A multiphase detection device for detecting the composition of a fluid sample includes a detection unit, a loading unit, and a cover. The loading unit is disposed on the detection unit, and the sample is loaded in the loading unit. The cover is placed on the sample surface inside the loading unit. The detection unit continuously emits a detection signal through the bottom of the loading unit to the sample and receives the component signal formed by the reflection of the detection signal after it is transmitted through the sample. Simultaneously, the component signal is analyzed to obtain the composition information of the sample. The cover includes a cover plate and multiple feet. The cover plate is a flat plate that covers the sample surface. The side of the cover plate that contacts the sample is a reflective surface. The multiple feet are symmetrically disposed on this surface and contact the bottom surface of the loading unit to provide support for the cover plate. The height adjustment of the feet corresponds to the transparency of the sample. The lower the transparency of the sample, the lower the height adjustment of the feet, so that the light beam can completely penetrate the sample.

[0007] Furthermore, the cover also includes a handle, multiple sets of extensions and multiple sets of connectors. The handle is located at the center of the surface of the cover plate away from the sample. The extensions are located on the surface of the cover plate away from the sample. One end of each connector is connected to the extension and the other end is connected to the handle. The number of connectors is the same as the number of extensions.

[0008] Furthermore, the extension member has an arc-shaped structure, the side of the extension member has a centrally symmetrical structure, and the bottom surface of the extension member that contacts the cover plate is a reflective surface; the multiple sets of extension members include multiple first sets of extension members and multiple second sets of extension members, and the multiple sets of connectors include multiple first sets of connectors and multiple second sets of connectors. The first sets of extension members are disposed on the outer side of the cover plate, and the second sets of extension members are disposed on the inner side of the cover plate. The outer arc edge of the second set of extension members contacts the inner arc edge of the first set of extension members, and they mutually limit each other in the plane where the cover plate is located, except in the direction outward along the radius of the cover plate.

[0009] Furthermore, the cover also includes a rotating head, multiple spiral columns, a rotating rod, and a transmission rod; the handle is disposed on the surface of the cover plate away from the sample, the rotating head is disposed at the end of the handle away from the cover plate and is connected to the rotating rod through the spiral columns, the rotating rod is disposed inside the handle and rotates in the same direction as the rotating head through the spiral columns; the transmission rod is disposed inside the cover plate and rotates synchronously with the rotation rod; the multiple feet are respectively connected to the corresponding transmission rods through spiral columns, and when the transmission rod rotates, the spiral columns rotate synchronously so that the height of the feet changes synchronously.

[0010] Furthermore, the emission position of the detection signal is at a certain distance from the center of the loading unit, and this distance is less than the radius of the loading unit.

[0011] Furthermore, the surface of the cover plate away from the sample is inclined, and the extension includes a trapezoidal blade and a parallelogram-shaped handle. The handle of the first set of extensions contacts the end of the blade of the second set of extensions away from the handle, and the handle of the second set of extensions contacts the handle.

[0012] Furthermore, the first set of connectors is connected to the first set of extensions and the handle, and the second set of connectors is connected to the second set of extensions and the handle. When the first set of connectors and the second set of connectors extend, they provide tension to their respective extensions.

[0013] Furthermore, the multiphase detection device also includes a rotator, which contacts the loading unit and drives the loading unit to rotate. The extension slides outward as the loading unit rotates. When the loading unit reaches a certain speed, the tension provided by the connecting member to its corresponding extension meets the centripetal force required for the extension to perform circular motion, and the extension stops sliding. At this time, the inner arc edge of the extension fits against the outer edge of the cover plate.

[0014] Furthermore, when the tension provided by the connector to its corresponding extension is sufficient to satisfy the centripetal force required for the extension to perform circular motion, the inner arc edge of the second set of extensions and the first set of extensions are in contact with the outer edge of the cover plate, and the side edge of the second set of extensions is in contact with the side edge of the first set of extensions.

[0015] Furthermore, the handle is a telescopic rod with an adjustable length. A locking element is provided near the rotating head. When the locking element is in the locked state, the length of the handle is locked. The length of the handle can be freely adjusted by adjusting the locking element to the unlocked state.

[0016] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a multiphase detection device in the prior art.

[0018] Figure 2 This is a schematic diagram of the multiphase detection device in Embodiment 1 of this utility model.

[0019] Figure 3 This is a schematic diagram of the multiphase detection device in Embodiment 2 of this utility model.

[0020] Figure 4 for Figure 3 A side view of the cover in the multiphase detection device.

[0021] Figure 5 for Figure 3 A top view of the cover described in the text.

[0022] Figure 6 for Figure 3 A schematic diagram of the bottom structure of the cover described in the document.

[0023] Figure 7 This is a schematic cross-sectional view of the cover structure in Embodiment 3 of this utility model.

[0024] Figure 8 This is a schematic diagram of the multiphase detection device in Embodiment 4 of this utility model.

[0025] Figure 9 for Figure 8 A schematic cross-sectional view of the cover in the multiphase detection device.

[0026] Figure 10 for Figure 9 A top view of the cover when it is not rotated.

[0027] Figure 11 for Figure 9 A top view of the cover when it is rotated.

[0028] Figure 12 This is a schematic cross-sectional view of the cover structure in Embodiment 5 of this utility model. Detailed Implementation

[0029] This invention carefully analyzes existing multiphase detection devices and finds that their low detection accuracy is due to the difficulty in fully penetrating dark-colored, high-viscosity fluid samples during detection. Furthermore, the loading unit, located inside the detection unit, is limited by the internal space, resulting in a small volume and opening. This makes it difficult to eliminate air bubbles when adding fluid samples, leading to sample residue remaining in the loading unit after detection and hindering quick cleaning for subsequent testing. Therefore, this invention first attempts to replace the transmission detection method in existing multiphase detection devices with an integrating sphere reflection detection method. This moves the loading unit outside the detection unit, increasing its volume and opening, preventing air bubble generation during sample addition, and facilitating cleaning and replacement.

[0030] Example 1

[0031] Based on this, the present invention provides a multiphase detection device, please refer to [link / reference]. Figure 2 The multiphase detection device includes a detection unit 1, a loading unit 2, and a cover 4. The loading unit 2 is disposed on the detection unit 1, the sample 3 is disposed in the loading unit 2, and the cover 4 is disposed on the loading unit 2.

[0032] The detection unit 1 includes a housing 10, a transmitter 11, a detection window 12, and a detector 13. The sample 3 is filled into the loading unit 2 through the opening 21, and the cover 4 is placed over the opening 21. The transmitter 11 is located inside the housing 10 and continuously emits a detection signal. The detection signal passes through the detection window 12 on the surface of the housing 10, transmits through the sample 3 in the loading unit 2, and is reflected back by the cover 4, forming a component signal containing the component information of the sample 3. The component signal transmits through the sample 3 again, passes through the detection window 12, and is received by the detector 13 inside the housing 10. The detector 13 analyzes the component signal to obtain the component information of the sample. The light aperture in the detection window 12 is located at the center of the detection window 12, and the center of the loading unit 2 is located at the light aperture of the detection window 12, that is, the center of the detection window 12 coincides with the center of the loading unit 2.

[0033] The loading unit 2 is used to carry the sample 3 for detection. It has an opening 21 at its top through which the sample 3 is loaded into the loading unit 2. Specifically, the loading unit 2 can be cylindrical, such as a beaker, water glass, or measuring cylinder, or inverted Y-shaped, such as a flask. The area of ​​the opening 21 can be adjusted according to actual conditions, ensuring that air bubbles are not easily generated when the sample 3 is poured in, and that the loading unit 2 has sufficient volume to accommodate the amount of sample 3 required for near-infrared detection. The bottom of the loading unit 2 has a flat, highly transparent area, larger than the detection area of ​​the detection window 12, to allow the detection signal to enter and achieve component detection of the sample 3. It is understood that the number and shape of the loading units 2 are not fixed. When detecting different samples 3, the same loading unit 2 can be used for cleaning, or different loading units 2 can be directly replaced.

[0034] The cover 4 is an opaque flat plate with a highly reflective surface on the side closest to the sample 3. The area of ​​the cover 4 is larger than the area of ​​the opening 21 of the loading unit 2.

[0035] Example 2

[0036] In the actual production application of Embodiment 1, it was found that due to the excessively large detection space between the cover 4 and the loading unit 2, the amount of sample required for detection in the loading unit 2 was too large, resulting in a significant increase in detection costs. Therefore, this embodiment attempts to modify the structure of the cover 4 based on Embodiment 1, reducing the detection space while ensuring sufficient reflection distance is reserved for the integrating sphere detection method, thereby reducing the amount of sample 3 required for detection and lowering detection costs.

[0037] Based on this, please refer to Figure 3This utility model provides a multiphase detection device, including a detection unit 1, a loading unit 2 and a cover 4. The loading unit 2 is disposed on the detection unit 1, the sample 3 is disposed in the loading unit 2, and the cover 4 is disposed on the surface of the sample 3 inside the loading unit 2.

[0038] Combination Figures 4 to 6 The cover 4 includes a cover plate 41, multiple feet 42, and a handle 43. The cover plate 41 is an opaque flat plate, and its shape can be circular or polygonal, etc., as long as the surface area of ​​the cover plate 41 is large enough to meet the conditions of near-infrared integrating sphere detection. At the same time, the surface area of ​​the cover plate 41 is smaller than the cross-sectional area of ​​the loading unit 2, so that it can be placed inside the loading unit 2 and covered on the surface of the sample 3, and can reflect the detection signal entering the sample 3 from the detection window 12 to obtain the component signal. Preferably, the cover plate is set as a circle with a radius greater than 15mm, so as to completely cover the light-transmitting hole in the detection window 12.

[0039] The base 42 is a cylindrical fixing block, symmetrically arranged on the surface of the cover plate 41 that contacts the sample 3. It provides support for the cover plate 41 when it is placed on the sample 3, thus creating a gap between the cover plate 41 and the loading unit 2 to accommodate the sample 3. The bottom surface of the base 42 is a smooth plane to prevent wear on the loading unit 2. There are at least two bases 42. Figure 6 The structure of the cover plate 41, including three feet 42, is shown.

[0040] The handle 43 is fixedly connected to the surface of the cover plate 41 away from the sample 3, so that the cover plate 41 can be easily moved by the handle 43, making it easy to put the cover plate 41 into the loading unit 2 and take it out of the loading unit 2.

[0041] The multiphase detection device in this embodiment 2 reduces the cross-sectional area of ​​the cover, allowing the cover to be placed in the loading unit to form a detection space. It also adds feet to reduce the size of the detection space between the cover and the loading unit, thereby saving the amount of sample to be tested. Furthermore, the cover can be easily placed and removed by setting a handle. With the replacement of the loading unit, different test samples can be detected quickly, which greatly improves the detection efficiency.

[0042] Example 3

[0043] In the actual production application of Embodiment 2, it was found that the simple structure of the cover 4 could not be applied to different samples 3, requiring the production of a large number of cover 4s with different parameters to cope with different samples 3. Therefore, Embodiment 3 attempts to further improve the structure of the cover 4 based on Embodiment 2, so that it can be adjusted according to the changes in the properties of the sample 3, thereby being applicable to various different samples 3 and reducing production costs.

[0044] Please see Figure 7 The cover 4 includes a cover plate 41, multiple feet 42, a handle 43, a rotating head 44, a spiral column 45, a rotating rod 46, and a transmission rod 47. The rotating head 44 is located at the end of the handle away from the cover plate 41 and is connected to the rotating rod 46 via the spiral column 45. The rotating rod 46 is located inside the handle 43 and rotates in the same direction as the rotating head 44 via the spiral column 45. The transmission rod 47 is located inside the cover plate 41 and rotates synchronously with the rotating rod 46. The multiple feet 42 are connected to the corresponding transmission rods 47 via the spiral column 45, so that when the transmission rod 47 rotates, the height of the feet 42 changes under the action of the spiral column 45. This allows the feet 42, which are difficult to reach at the bottom, to be adjusted by the rotating head 44, which is easily accessible at the top, without the need for individual adjustment and height equalization of each foot 42. Instead, multiple feet 42 can be adjusted simultaneously by one rotating head 44.

[0045] To prevent the foot 42 from affecting the sample 3 itself, a spiral column 45 is placed inside the foot 42. The height of the foot 42 changes as the spiral column 45 rotates, ensuring that only the foot 42 contacts the sample 3 during this process. Preferably, the outer side of the foot 42 is made of a flexible or elastic material, which stretches or compresses with the height change of the foot 42, ensuring that the outer side of the foot 42 always maintains a cylindrical shape and that there are no gaps between it and the cover plate 41, thus preventing any impact on the detection of the sample 3. Furthermore, to ensure that the light emitted by the beam can completely penetrate the sample 3, the lower the transparency, the lower the height of the foot is adjusted. Therefore, the height of the foot 42 is determined by the transparency of the sample 3. When detecting fluids with the same transparency, the feet need to be kept at the same height. Specifically, to better meet the needs of large-scale rapid detection, the transparency of the sample 3 is divided into dark and normal levels. For dark-level samples 3, the height of the foot 42 is adjusted to 1 mm, and for normal-level samples 3, the height of the foot 42 is adjusted to 2 mm.

[0046] Understandable Figure 7 This is a cross-sectional view of the cover. The dashed lines in the figure represent the internal structure of the cover, which cannot be directly observed from the outside. To make it easier to distinguish, dashed lines represent the hidden internal structure, while solid lines represent the externally observable structure.

[0047] Specifically, the handle 43 is a telescopic rod with an adjustable length. A locking element is provided near the rotating head 44. When the locking element is locked, the length of the handle 43 is locked and cannot be adjusted. When the locking element is unlocked, the length of the handle 43 can be freely adjusted up and down. Those skilled in the art can adjust it according to actual needs. Preferably, the handle length is set to be greater than the height of the loading unit 2, thereby facilitating the insertion or removal of the cover 4 into the loading unit 2.

[0048] Example 4

[0049] In the actual production applications of Embodiments 2 and 3, it was found that the detection effect at different points of sample 3 varied, making it difficult to comprehensively and accurately detect the composition of sample 3. Therefore, in Embodiment 4, based on Embodiments 2 and 3, a rotator was considered for rotating sample 3 for detection. However, under centrifugal force, the radius occupied by sample 3 would increase compared to conventional detection, and the area of ​​the cover plate 41 in the original design could not completely cover sample 3. Therefore, an attempt was made to further improve the structure of the cover 4 by adding an extension to increase the area of ​​the cover plate 41 and changing the relative position of the center of the loading unit 2 and the light aperture of the detection window 12, so that sample 3 could be detected in near-infrared mode while rotating, thereby improving the accuracy of detection.

[0050] Please see Figure 8 The detection unit 1 further includes a rotator 15, which is disposed outside the housing 10, in contact with the side wall of the loading unit 2, and drives the loading unit 2 to rotate along the central axis of the bottom surface of the loading unit 2. The light aperture in the detection window 12 is at a certain distance from the center of the loading unit 2, which is less than the radius of the loading unit 2, so that the detection signal can illuminate multiple positions of the sample 3 when the loading unit 2 rotates.

[0051] Combination Figures 9 to 10 The cover 4 also includes multiple sets of extension members 5 and multiple sets of connectors 6. The handle 43 is located at the center of the surface of the cover plate 41 away from the sample 3. The extension members are located on the surface of the cover plate 41 away from the sample 3. One end of each connector 6 is connected to the extension member 5, and the other end is connected to the handle 43. The number of connectors 6 is the same as the number of extension members 5. The extension member 5 has an arc-shaped structure, and its side is a centrally symmetrical Z-shaped structure. The bottom surface that contacts the cover plate 41 is a smooth reflective surface.

[0052] In this embodiment 4, the multiple sets of extension members 5 include four first sets of extension members 51 and four second sets of extension members 52, and the multiple sets of connectors 6 include four first sets of connectors 61 and four second sets of connectors 62. The first sets of extension members 51 are disposed on the outer side of the cover plate 41, and the second sets of extension members 52 are disposed on the inner side of the cover plate 41. The outer arc edge of the second sets of extension members 52 contacts the inner arc edge of the first sets of extension members 51, forming a limiting relationship between them in the plane of the cover plate 41 except in the direction outward along the radius of the cover plate 41. The first sets of connectors 61 are connected to the first sets of extension members 51 and the handle 43, and the second sets of connectors 62 are connected to the second sets of extension members 52 and the handle 43. The first sets of connectors 61 and the second sets of connectors 62 are structures with elastic potential energy, such as springs, which provide tension to their respective extension members 5 when extension occurs. Specifically, the cover plate 41 is set as a circle with a radius greater than 50 mm, and the radius of the base is set to 1.5-5 mm.

[0053] Please see Figure 11 When the rotator 15 drives the loading unit 2 to rotate, the extension piece 5 will slide outward under the influence of centrifugal force. When the sliding distance of the extension piece 5 is such that the tension provided by the corresponding connecting piece 6 satisfies the centripetal force required for the extension piece 5 to perform circular motion, the extension piece 5 will stop sliding. Since the rotational speed of the rotator 15 is usually a fixed setting in actual testing, the elastic coefficient of the connecting piece 6 can be set according to the actual rotational speed requirements so that when the extension piece 5 performs circular motion, its inner arc edge just fits against the outer edge of the cover plate 41. The elastic coefficient of the second set of connecting pieces 62 is smaller than that of the first set of connecting pieces 61.

[0054] It is understood that the number of the first set of extension pieces 51 is not limited to four, and the number of the second set of extension pieces 52 is not limited to the same as the first set of extension pieces 51. It can be divided according to the radius length that the actual cover plate 41 needs to expand and the radius of the cover plate 41 itself. Similarly, the extension pieces 5 are not limited to the first set of extension pieces 51 and the second set of extension pieces 52.

[0055] Example 5

[0056] In the actual production application of Embodiment 4, it was found that when not rotated, the connecting member 6 is in a relaxed state, and the extension member 5 is not limited in the direction outward from the radius of the cover plate 41 on the plane of the cover plate 41. Therefore, the extension member 5 is prone to sliding when the cover 4 moves, causing inconvenience. To address this, Embodiment 5 improves upon Embodiment 4 by changing the surface of the cover plate 41 away from the sample 3 from a plane to a slope. At the same time, the structure of the extension member 5 is adaptively improved, and the connecting member 6 is initially in an elongated state to provide tensile force limiting for the extension member 5.

[0057] Please see Figure 12The surface of the cover plate 41 away from the sample 3 is an inclined plane with a certain angle. The side of the extension 5 is knife-shaped, including a trapezoidal blade and a parallelogram handle. The handle of the first set of extensions 51 contacts the end of the blade of the second set of extensions 52 away from the handle, and the handle of the second set of extensions 52 contacts the handle, thereby forming a limit on the plane of the cover plate 41 except in the direction outward along the radius of the cover plate 41. It can be understood that the extension 5 needs to be fully rotated out before testing, and the inner arc edge of the extension 5 should just fit against the outer edge of the cover plate 41 during circular motion.

[0058] The first set of connectors 61 is connected to the first set of extensions 51 and the handle 43, and the second set of connectors 62 is connected to the second set of extensions 52 and the handle 43. When the cover 4 is not rotated, the connectors 6 provide a partial pulling force to the extensions 5 so that the extensions 5 will not slide outward from the cover plate 41, thereby achieving the limitation of the extensions 5 in any direction along the plane of the cover plate 41.

[0059] The embodiments described above only illustrate the preferred implementation of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of this utility model, and this utility model also intends to include these modifications and variations.

Claims

1. A multiphase detection device for detecting the composition of a fluid sample, characterized in that: The system includes a detection unit, a loading unit, and a cover. The loading unit is mounted on the detection unit, and the sample is placed inside the loading unit. The cover is placed on the sample surface inside the loading unit. The detection unit continuously emits a detection signal through the bottom of the loading unit to the sample and receives the component signal formed by the reflection of the detection signal after it passes through the sample. Simultaneously, the component signal is analyzed to obtain the sample's component information. The cover includes a cover plate and multiple feet. The cover plate is a flat plate that covers the sample surface. The side of the cover plate that contacts the sample is a reflective surface. Multiple feet are symmetrically arranged on this surface and contact the bottom surface of the loading unit to provide support for the cover plate. The height adjustment of the feet corresponds to the sample's transparency. The lower the sample's transparency, the lower the height adjustment of the feet, so that the light beam can completely penetrate the sample.

2. The multi-phase detection apparatus of claim 1, wherein: The cover also includes a handle, multiple sets of extensions and multiple sets of connectors. The handle is located at the center of the surface of the cover plate away from the sample. The extensions are located on the surface of the cover plate away from the sample. One end of each connector is connected to the extension and the other end is connected to the handle. The number of connectors is the same as the number of extensions.

3. The multiphase detection device according to claim 2, characterized in that: The extension component has an arc-shaped structure and a centrally symmetrical side. The bottom surface of the extension component that contacts the cover plate is a reflective surface. The multiple sets of extension components include multiple first sets of extension components and multiple second sets of extension components. The multiple sets of connectors include multiple first sets of connectors and multiple second sets of connectors. The first sets of extension components are located on the outer side of the cover plate, and the second sets of extension components are located on the inner side of the cover plate. The outer arc edge of the second set of extension components contacts the inner arc edge of the first set of extension components, and they mutually limit each other in the plane where the cover plate is located, except in the direction outward along the radius of the cover plate.

4. The multiphase detection device according to claim 3, characterized in that: The cover also includes a rotating head, multiple spiral columns, a rotating rod, and a transmission rod. The handle is disposed on the surface of the cover plate away from the sample. The rotating head is disposed at the end of the handle away from the cover plate and is connected to the rotating rod via the spiral columns. The rotating rod is disposed inside the handle and rotates in the same direction as the rotating head via the spiral columns. The transmission rod is disposed inside the cover plate and rotates synchronously with the rotating rod. The multiple feet are respectively connected to the corresponding transmission rods via spiral columns. When the transmission rod rotates, the spiral columns rotate synchronously, so that the height of the feet changes synchronously.

5. The multiphase detection device according to claim 4, characterized in that: The emission position of the detection signal is at a certain distance from the center of the loading unit, and this distance is less than the radius of the loading unit.

6. The multiphase detection device according to claim 5, characterized in that: The surface of the cover plate away from the sample is inclined. The extension includes a trapezoidal blade and a parallelogram handle. The handle of the first set of extensions is in contact with the end of the blade of the second set of extensions away from the handle. The handle of the second set of extensions is in contact with the handle.

7. The multiphase detection device according to claim 6, characterized in that: The first set of connectors is connected to the first set of extensions and the handle, and the second set of connectors is connected to the second set of extensions and the handle. When the first set of connectors and the second set of connectors extend, they provide tension to their respective extensions.

8. The multiphase detection device according to claim 7, characterized in that: The multiphase detection device also includes a rotator, which contacts the loading unit and drives the loading unit to rotate. The extension slides outward as the loading unit rotates. When the loading unit reaches a certain speed, the tension provided by the connecting member to its corresponding extension meets the centripetal force required for the extension to make circular motion, and the extension stops sliding. At this time, the inner arc edge of the extension fits against the outer edge of the cover plate.

9. The multiphase detection device according to claim 8, characterized in that: When the tension provided by the connector to its corresponding extension is sufficient to satisfy the centripetal force required for the extension to make a circular motion, the inner arc edge of the second set of extensions and the first set of extensions are in contact with the outer edge of the cover plate, and the side of the second set of extensions is in contact with the side of the first set of extensions.

10. The multiphase detection device according to any one of claims 4-9, characterized in that: The handle is a telescopic rod with an adjustable length. A locking element is provided near the rotating head. When the locking element is in the locked state, the length of the handle is locked. The length of the handle can be freely adjusted by adjusting the locking element to the unlocked state.

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