Detection components and detection methods

Abstract

This invention provides a detection component and a detection method. The detection component is connected to a frequency sweep component for detecting power devices. The detection component includes a base, a first mounting component, a support component, a first sleeve, a second sleeve, a probe component, and a pressure detection component. The first mounting component is disposed on the base; the support component is disposed on the base; the first sleeve is connected to the support component and is movable relative to the support component; the second sleeve is connected to the first sleeve and is movable relative to the first sleeve; the probe component is connected to the first sleeve; the pressure detection component includes a pressure detection element and an elastic element; one end of the elastic element is connected to the second sleeve, and the other end of the elastic element is connected to the first sleeve. When detecting a power device, the power device is placed on the first mounting component, and the pressure detection element can detect a first pressure value of the elastic element to control the contact state between the probe component and the power device.

Description

Technical Field

[0001] This invention relates to the field of testing tooling technology, and more specifically to a testing component and testing method. Background Technology

[0002] Currently, in related technologies, when testing power devices, it is necessary to manually bring the test probe into contact with the test terminal of the power device. However, it is difficult to guarantee the pressure of the test probe when it comes into contact with the test terminal each time, which leads to measurement errors. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] Therefore, a first aspect of the present invention provides a detection component.

[0005] A second aspect of the present invention provides a detection method.

[0006] In view of this, a first aspect of the present invention provides a detection assembly connected to a frequency sweep assembly for detecting a power device. The detection assembly includes a base, a first mounting assembly, a support assembly, a first sleeve, a second sleeve, a probe assembly, and a pressure detection assembly. The first mounting assembly is disposed on the base; the support assembly is disposed on the base; the first sleeve is connected to the support assembly and is movable relative to the support assembly; the second sleeve is connected to the first sleeve and is movable relative to the first sleeve; the probe assembly is connected to the first sleeve; the pressure detection assembly includes a pressure detection component and an elastic element; one end of the elastic element is connected to the second sleeve, and the other end of the elastic element is connected to the first sleeve; when detecting a power device, the power device is placed on the first mounting assembly, and the pressure detection assembly can detect a first pressure value of the elastic element to control the contact state between the probe assembly and the power device.

[0007] In this technical solution, the detection component is connected to the frequency sweep component for detecting power devices. This allows the detection component to detect the impedance changes of the power devices at different frequencies, thereby enabling the detection of the power devices. The detection component includes a base, a first mounting component, a support component, a first sleeve, a second sleeve, a probe component, and a pressure detection component. The first mounting component is disposed on the base to mount the power devices. The support component is disposed on the base to mount and fix the support component. The first sleeve is connected to the support component and can move relative to the support component to mount the first sleeve, allowing the support component to adjust the position of the first sleeve. The probe component is connected to the first sleeve to mount the probe component on the first sleeve. The second sleeve is connected to the first sleeve and can move relative to the first sleeve. When the second sleeve moves, the probe component moves with the second sleeve, allowing the second sleeve to control the movement of the probe component. The pressure detection assembly includes a pressure detection component and an elastic element. One end of the elastic element is connected to a second sleeve, and the other end is connected to a first sleeve, thus connecting the first and second sleeves via the elastic element. The pressure detection component can detect the pressure on the elastic element. When testing a power device, the power device is placed on a first mounting assembly, causing the probe terminals of the probe assembly to contact the test terminals of the power device. Then, the second sleeve is controlled to move relative to the first sleeve. After the elastic element is compressed, the pressure detection assembly can detect a first pressure value of the elastic element. Each time the pressure detection component detects the first pressure value, it can determine that the probe terminals of the probe assembly have reached a predetermined position, thereby controlling the contact state between the probe assembly and the power device. This ensures that the contact pressure between the probe terminals of the probe assembly and the power device remains consistent, avoiding errors in each measurement and improving the accuracy of power device testing.

[0008] In addition, the detection component in the above-mentioned technical solution provided by the present invention may also have the following additional technical features:

[0009] In one technical solution of the present invention, a mounting groove is provided on the bottom wall of the first sleeve, the opening of the mounting groove faces the elastic member, the mounting groove is recessed away from the first sleeve, and one end of the elastic member is located in the mounting groove.

[0010] In this technical solution, a mounting groove is provided on the bottom wall of the first sleeve. The opening of the mounting groove faces the elastic element, and the mounting groove is recessed away from the first sleeve. One end of the elastic element is located in the mounting groove, so that the mounting groove can install the elastic element, so that the mounting groove can fix one end of the elastic element, and the elastic element can be compressed in a preset direction. This can avoid errors in the pressure detection of the elastic element by the pressure detection component.

[0011] In one technical solution of the present invention, the bracket assembly includes a first support component, a support, a first rotating rod, a gear, a first mounting plate, a second mounting plate, a lead screw, and a sliding member. The first support component is disposed on the base; the support is connected to the first support component; the first rotating rod passes through the support; the gear is sleeved on the first rotating rod; a rack is disposed on one side of the first mounting plate, and the rack meshes with the gear; one end of the second mounting plate is connected to the side of the first mounting plate opposite to the rack, and forms an angle with the first mounting plate; the lead screw is mounted on the side of the second mounting plate facing the base and is rotatable relative to the second mounting plate; one end of the sliding member is connected to a first sleeve, and the other end of the sliding member cooperates with the lead screw and is axially movable along the lead screw.

[0012] In this technical solution, the bracket assembly includes a first supporting component, a support, a first rotating rod, a gear, a first mounting plate, a second mounting plate, a lead screw, and a sliding component. The first supporting component is disposed on the base to achieve the installation and fixation of the first supporting component. The support is connected to the first supporting component to achieve the installation of the support. The first rotating rod passes through the support, and the gear is sleeved on the first rotating rod so that when the first rotating rod rotates relative to the support, the first rotating rod can drive the gear to rotate. A rack is provided on one side of the first mounting plate, and the rack meshes with the gear to achieve the installation of the rack. When the first rotating rod rotates, the first mounting plate can move axially along the first supporting component. One end of the second mounting plate is connected to the side of the first mounting plate opposite to the rack, and forms an angle with the first mounting plate so that the first mounting plate and the second mounting plate are L-shaped. The lead screw is installed on the side of the second mounting plate facing the base and can rotate relative to the second mounting plate to achieve the installation of the lead screw. One end of the slider is connected to the first sleeve, and the other end of the slider is engaged with the lead screw, enabling it to move along the axial direction of the lead screw. The horizontal position of the slider can be adjusted forward and backward by rotating the lead screw, so that the position of the probe assembly can be adjusted in the horizontal direction when the slider moves. When the first rotating part moves, the position of the probe assembly can be adjusted in the vertical direction. By setting the lead screw transmission structure and the gear and rack transmission structure, the vertical and horizontal movement of the slider can be realized, thereby realizing the rapid positioning and measurement of the probe assembly of the device under test.

[0013] In one embodiment of the present invention, the second sleeve includes a cylindrical body and a first positioning component. The cylindrical body is located inside the first sleeve; the first positioning component is located on the side of the cylindrical body away from the base and is connected to the probe assembly.

[0014] In this technical solution, the second sleeve includes a cylinder body and a first positioning component. The cylinder body is located inside the first sleeve, so that the first sleeve is fitted onto the cylinder body, allowing the cylinder body to move relative to the first sleeve. The first positioning component is located on the side of the cylinder body away from the base and is connected to the probe assembly to install the first positioning component, allowing the first positioning component to fix and position the probe assembly so that the probe assembly can move together with the cylinder body.

[0015] In one embodiment of the present invention, the probe assembly includes a grounding probe and at least one detection probe. The side of the grounding probe away from the base is disposed on a first positioning component; the side of the at least one detection probe away from the base is disposed on the first positioning component and is arranged side by side with the grounding probe, allowing them to be either far away from or close to each other.

[0016] In this technical solution, the probe assembly includes a ground probe and at least one detection probe. The side of the ground probe furthest from the base is positioned on a first positioning component for mounting the ground probe. The side of the at least one detection probe furthest from the base is also positioned on the first positioning component, and is arranged parallel to the ground probe for mounting the at least one detection probe. This allows the first positioning component to fix the mounting position of the at least one detection probe. The at least one detection probe can move away from or closer to the ground probe, allowing the first positioning component to adjust the distance between the at least one detection probe and the ground probe. Since the distance between test terminals on different power devices varies, the probe assembly can adjust the distance between the probes accordingly based on the test terminals. This allows it to adapt to power devices with different package structures, i.e., power devices with different terminal spacing, thus meeting the universal testing requirements for power devices.

[0017] In one technical solution of the present invention, the second sleeve further includes a limiting post, which is located inside the elastic member. One end of the limiting post is connected to the bottom wall of the second sleeve, and the other end of the elastic member can contact the bottom wall of the first sleeve.

[0018] In this technical solution, the second sleeve also includes a limiting post located inside the elastic element. One end of the limiting post is connected to the bottom wall of the second sleeve to achieve the installation and fixation of the limiting post. The other end of the elastic element can contact the bottom wall of the first sleeve, thereby allowing the limiting post to restrict the movement distance of the second sleeve and play the role of limiting the compression distance of the elastic element. When the other end of the elastic element can contact the bottom wall of the first sleeve, by detecting the pressure value of the elastic element, the ohmic contact test requirement of consistent contact pressure between the probe terminal and the test terminal can be ensured to reduce measurement error.

[0019] A second aspect of the present invention provides a detection method for detecting a power device using the detection component in any of the above-described technical solutions. The detection method includes: controlling the detection part of the probe component to be opposite to the test terminal of the power device according to the position of the power device; controlling the detection part of the probe component to contact the test terminal of the power device; controlling the second sleeve to move relative to the first sleeve; controlling the contact state between the probe component and the power device according to a first pressure value; and controlling the probe component to detect the power device.

[0020] In this technical solution, based on the position of the power device, the detection part of the probe assembly is aligned with the test terminal of the power device. Then, based on the position of the power device, the probe assembly is moved closer to it to facilitate measurement. By controlling the detection part of the probe assembly to contact the test terminal of the power device, the second sleeve is moved relative to the first sleeve. This ensures that after the second sleeve moves, the compression of the elastic element is the same as the distance the probe assembly moves relative to the power device. After the elastic element is compressed, the first pressure value of the elastic element is detected to determine whether the probe assembly has moved to a position with consistent pressure for each measurement. The contact state between the probe assembly and the power device is controlled based on the first pressure value. Once the probe assembly moves to a position with consistent pressure relative to the power device, it is then controlled to measure the power device. This avoids errors in each measurement and improves the accuracy of power device testing.

[0021] In one technical solution of the present invention, before controlling the movement of the second sleeve relative to the first sleeve, the detection method further includes: controlling the pressure detection component to detect the initial pressure value of the elastic element when the probe assembly contacts the test terminal of the power device.

[0022] In this technical solution, before the second sleeve moves relative to the first sleeve, the pressure detection component detects the initial pressure value of the elastic element when the probe assembly contacts the test terminal of the power device. This avoids the spring being compressed before the second sleeve moves relative to the first sleeve, thereby further ensuring the accuracy of the pressure detection component's detection of the elastic element's pressure value after the second sleeve moves relative to the first sleeve. It also ensures that the probe terminal can move to a position with consistent detection pressure each time, minimizing detection errors.

[0023] In one technical solution of the present invention, if the first pressure value is equal to the first pressure threshold, the probe assembly is controlled to detect the power device; if the first pressure value is greater than or less than the first pressure threshold, the initial pressure value of the elastic element is calibrated.

[0024] In this technical solution, after the elastic element is compressed, if the first pressure value equals the first pressure threshold, the probe terminals of the probe assembly have moved to a position with consistent pressure, controlling the probe assembly to detect the power device. If the first pressure value is greater than or less than the first pressure threshold, the probe terminals of the probe assembly are not in a position with consistent pressure after the elastic element is compressed. In this case, it is necessary to calibrate the initial pressure value of the elastic element. The second sleeve is then controlled to move relative to the first sleeve, so that the probe terminals of the probe assembly move to a position with consistent pressure. This ensures that the probe terminals are in a position with consistent pressure every time the power device is detected, thereby reducing measurement errors.

[0025] In one technical solution of the present invention, controlling the detection part of the probe assembly to be opposite to the test terminal of the power device according to the position of the power device includes: acquiring the position of the power device; controlling the slider to move the probe assembly to the position of the power device according to the position of the power device; acquiring the position of the test terminal; and adjusting the spacing between the grounding probe and at least one detection probe according to the position of the test terminal.

[0026] In this technical solution, the position of the power device is obtained; based on the position of the power device, a slider is controlled to move the probe assembly to the position of the power device, thereby allowing the probe assembly to move close to the power device. The position of the test terminal is obtained, and the spacing between the grounding probe and at least one detection probe is adjusted according to the position of the test terminal. Since the distance between the test terminals on different power devices is different, the probe assembly can adjust the distance between the probes accordingly based on the test terminals, thereby enabling the testing of different power devices.

[0027] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0028] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0029] Figure 1 One of the structural schematic diagrams of a detection component according to an embodiment of the present invention is shown;

[0030] Figure 2 A cross-sectional view of a detection component according to an embodiment of the present invention is shown;

[0031] Figure 3 A schematic diagram of the structure of a base according to an embodiment of the present invention is shown;

[0032] Figure 4A second schematic diagram of the structure of a detection component according to an embodiment of the present invention is shown;

[0033] Figure 5 A third schematic diagram of the structure of a detection component according to an embodiment of the present invention is shown;

[0034] Figure 6 A fourth schematic diagram of the structure of a detection component according to an embodiment of the present invention is shown;

[0035] Figure 7 One of the schematic diagrams of a probe assembly according to an embodiment of the present invention is shown;

[0036] Figure 8 A second schematic diagram of the structure of a probe assembly according to an embodiment of the present invention is shown;

[0037] Figure 9 A third schematic diagram of the structure of a probe assembly according to an embodiment of the present invention is shown;

[0038] Figure 10 A cross-sectional view of a probe assembly according to an embodiment of the present invention is shown;

[0039] Figure 11 One of the flowcharts of a detection method according to an embodiment of the present invention is shown;

[0040] Figure 12 A second flowchart of a detection method according to an embodiment of the present invention is shown;

[0041] Figure 13 A third flowchart of a detection method according to an embodiment of the present invention is shown;

[0042] Figure 14 A third flowchart of a detection method according to an embodiment of the present invention is shown.

[0043] in, Figures 1 to 14 The correspondence between diagram labels and component names is as follows:

[0044] 100 Detection component, 110 Base, 112 Slide groove, 114 Base body, 116 Boss, 120 First mounting component, 122 First rotating shaft, 124 Second rotating shaft, 126 First clamping component, 128 Second clamping component, 130 Bracket assembly, 131 First support component, 132 Support, 133 First rotating rod, 134 Gear, 135 First mounting plate, 136 Second mounting plate, 137 Lead screw, 138 Rack, 139 Bearing seat, 140 Sliding component, 150 First sleeve, 152 Mounting groove, 160 Second sleeve, 162 Cylinder body, 164 First positioning component, 166 Limiting post, 170 Probe assembly, 172 Grounding probe, 174 Detection probe, 176 First probe, 178 Second probe, 180 Pressure detection component, 182 Elastic component, 184 Pressure detection component, 200 Sweep frequency assembly, 700 Power device. Detailed Implementation

[0045] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0046] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0047] The following reference Figures 1 to 14 The detection component 100 and detection method according to some embodiments of the present invention.

[0048] In view of this, such as Figure 1 , Figure 2 and Figure 3As shown, the first aspect of the present invention provides a detection component 100, which is connected to a frequency sweep component 200 and is used to detect a power device 700. The detection component 100 includes a base 110, a first mounting component 120, a bracket component 130, a first sleeve 150, a second sleeve 160, a probe component 170, and a pressure detection component 180. The first mounting assembly 120 is disposed on the base 110; the bracket assembly 130 is disposed on the base 110; the first sleeve 150 is connected to the bracket assembly 130 and is movable relative to the bracket assembly 130; the second sleeve 160 is connected to the first sleeve 150 and is movable relative to the first sleeve 150; the probe assembly 170 is connected to the first sleeve 150; the pressure detection assembly 180 includes a pressure detection component 184 and an elastic element 182; one end of the elastic element 182 is connected to the second sleeve 160, and the other end of the elastic element 182 is connected to the first sleeve 150; when the power device 700 is being tested, the power device 700 is placed on the first mounting assembly 120, and the pressure detection component 184 can detect the first pressure value of the elastic element 182 to control the contact state between the probe assembly 170 and the power device 700.

[0049] In this embodiment, the detection component 100 and the frequency sweep component 200 are connected by a cable for detecting the power device 700. This allows the detection component 100 to detect the impedance changes of the power device 700 at different frequencies. The detection component 100 includes a base 110, a first mounting component 120, a support component 130, a first sleeve 150, a second sleeve 160, a probe component 170, and a pressure detection component 180. The first mounting component 120 is disposed on the base 110 for mounting the power device 700. The support component 130 is disposed on the base 110 for mounting and fixing the support component 130. The first sleeve 150 is connected to the support component 130 and is movable relative to the support component 130 for mounting the first sleeve 150, allowing the support component 130 to adjust the position of the first sleeve 150. The probe assembly 170 is connected to the first sleeve 150 to mount the probe assembly 170 onto the first sleeve 150. The second sleeve 160 is connected to the first sleeve 150 and can move relative to the first sleeve 150. Therefore, when the second sleeve 160 moves, the probe assembly 170 can move with the second sleeve 160, allowing the second sleeve 160 to control the movement of the probe assembly 170. The pressure detection assembly 180 includes a pressure detection component 184 and an elastic element 182. One end of the elastic element 182 is connected to the second sleeve 160, and the other end is connected to the first sleeve 150, so that the first sleeve 150 and the second sleeve 160 are connected via the elastic element 182. The pressure detection component 184 can detect the pressure of the elastic element 182. When testing the power device 700, the power device 700 is placed on the first mounting assembly 120, so that the probe terminal of the probe assembly 170 contacts the test terminal of the power device 700. Then, the second sleeve 160 is controlled to move relative to the first sleeve 150. After the elastic member 182 is compressed, the pressure detection component 180 can detect the first pressure value of the elastic member 182. After the pressure detection component 184 detects the first pressure value each time, it can be determined that the probe terminal of the probe assembly 170 has moved to a predetermined position. This allows control of the contact state between the probe assembly 170 and the power device 700, thereby ensuring that the contact pressure between the probe terminal of the probe assembly 170 and the power device 700 remains consistent. This avoids errors that occur in each measurement and improves the accuracy of testing the power device 700.

[0050] Specifically, by connecting the pressure detection component 184 to the elastic element 182, the pressure detection component 184 can detect the pressure value of the elastic element 182.

[0051] Specifically, a handle is provided at the end of the second sleeve 160 away from the elastic member 182, and the movement of the second sleeve 160 relative to the first sleeve 150 can be controlled by pressing the handle.

[0052] Specifically, the pressure detection component 184 consists of a sensor, a signal detection and processing unit, and a display panel, so that the pressure value of the elastic element 182 can be directly known when the elastic element 182 is compressed. By detecting the amount of stretching and compression of the elastic element 182, it is ensured that the detection probe assembly 170 can move relative to the power device 700 to a position where the contact pressure is consistent each time.

[0053] Specifically, the base 110 includes a base 114 and two bosses 116. The base 114 has a groove 112 recessed in a direction away from the probe assembly 170. The two bosses 116 are located on opposite sides of the groove 112 along its length and are connected to the base 114. The first mounting assembly 120 includes a first rotating shaft 122, a second rotating shaft 124, a first clamping component 126, and a second clamping component 128. Each of the two bosses 116 has a through hole, which is circular and threaded. The outer walls of the first rotating shaft 122 and the second rotating shaft 124 also have threads that engage with the threads in the through holes. The first clamping component 126 and the second clamping component 128 are located between the two bosses 116. The first rotating shaft 122 passes through the through hole on one of the two bosses 116 and the first clamping component 126, so that when the rotating shaft rotates, the first clamping component 126... 26 can move along the axial direction of the first rotating shaft 122; the second rotating shaft 124 passes through the through hole on the other boss 116 and the second clamping member 128, so that when the rotating shaft rotates, the second clamping member 128 can move along the axial direction of the second rotating shaft 124; and by rotating the first rotating shaft 122 and the second rotating shaft 124, the first clamping member 126 and the second clamping member 128 can clamp or release the power device 700. One side of the first clamping member 126 and the second clamping member 128 is located in the slide groove 112 and can slide in the slide groove 112 along the length direction of the slide groove 112.

[0054] Specifically, the initial contact pressure between the probe and the test terminal in the probe assembly 170 is calibrated by the pressure detection component 184. Generally, the initial contact pressure is set to 0, that is, at this time the probe of the probe assembly 170 is just in contact with the power device 700. Then, the contact pressure of the probe tip on the terminal is kept consistent by further compressing the elastic element 182.

[0055] Specifically, power semiconductor devices operate in harsh environments for extended periods. Under prolonged electrical, thermal, and vibration shocks, these devices are prone to aging and reliability issues, which can affect their normal operation. Related research indicates that approximately 38% of power system failures originate from the failure of power semiconductor devices. Given the crucial role of the power device 700 in electronic power systems, the need for online detection technology in reliability studies of the power device 700 becomes particularly important. In this application, the probe assembly 170 and the sweep frequency assembly 200 system are connected via threaded engagement. The probe assembly 170 contains a 50Ω internal transmission line, and the sweep frequency assembly 200's 50Ω cable is press-fitted and interconnected via an SMA adapter. Adjusting the probe spacing enables online frequency domain measurement of discrete devices with different terminal spacings in different packages. The first mounting component 120 can simultaneously mount multiple power devices under test 700. The detection component 100 in this application can achieve rapid batch detection. The probe component 170 can be directly interconnected with the signal port of the sweep frequency component 200 (such as a vector network analyzer or impedance analyzer) through its built-in SMA port. After interconnection with the frequency domain reflection instrument, the device under test can be fixed, positioned, and subjected to point contact measurement through the probe fine-tuning positioning structure, the device under test clamping structure, and the limit spring pressing structure of the device.

[0056] Furthermore, this application solves the problem of traditional frequency domain measurement technology's inability to perform online measurement of semiconductor power devices 700 by further compressing the elastic element 182 to ensure consistent contact pressure between the probe tip and the terminal. It successfully extends frequency domain measurement technology to the field of online quality screening and online quality inspection of semiconductor power devices 700. This achieves online frequency domain measurement of semiconductor power devices 700 in various package forms, avoiding the cumbersome process of integrating external impedance matching fixtures and soldering the measurement fixture to the device under test, which is essential in traditional frequency domain measurement. This significantly reduces the difficulty, time, and cost of frequency domain measurement.

[0057] This embodiment provides a detection component 100, which, in addition to the technical features of the above embodiments, further includes the following technical features.

[0058] like Figure 2 As shown, a mounting groove 152 is provided on the bottom wall of the first sleeve 150. The opening of the mounting groove 152 faces the elastic member 182. The mounting groove 152 is recessed in a direction away from the first sleeve 150. One end of the elastic member 182 is located in the mounting groove 152.

[0059] In this embodiment, a mounting groove 152 is provided on the bottom wall of the first sleeve 150. The opening of the mounting groove 152 faces the elastic member 182, and the mounting groove 152 is recessed away from the first sleeve 150. One end of the elastic member 182 is located in the mounting groove 152, so that the mounting groove 152 can install the elastic member 182, so that the mounting groove 152 can fix one end of the elastic member 182, so that the elastic member 182 can be compressed in a preset direction, thereby avoiding errors in the pressure detection of the elastic member 182 by the pressure detection component 184.

[0060] Specifically, the elastic element 182 is a spring, and the opening of the mounting groove 152 is circular, which can fix one end of the elastic element 182.

[0061] This embodiment provides a detection component 100, which, in addition to the technical features of the above embodiments, further includes the following technical features.

[0062] like Figure 1 , Figure 4 and Figure 5 As shown, the bracket assembly 130 includes a first support component 131, a support 132, a first rotating rod 133, a gear 134, a first mounting plate 135, a second mounting plate 136, a lead screw 137, and a sliding member 140. A first support component 131 is disposed on a base 110; a support 132 is connected to the first support component 131; a first rotating rod 133 passes through the support 132; a gear 134 is sleeved on the first rotating rod 133; a rack 138 is disposed on one side of a first mounting plate 135, and the rack 138 meshes with the gear 134; one end of a second mounting plate 136 is connected to the side of the first mounting plate 135 away from the rack 138, and forms an angle with the first mounting plate 135; a lead screw 137 is mounted on the side of the second mounting plate 136 facing the base 110, and can rotate relative to the second mounting plate 136; one end of a sliding member 140 is connected to a first sleeve 150, and the other end of the sliding member 140 cooperates with the lead screw 137, and can move along the axial direction of the lead screw 137.

[0063] In this embodiment, the bracket assembly 130 includes a first support member 131, a support 132, a first rotating rod 133, a gear 134, a first mounting plate 135, a second mounting plate 136, a lead screw 137, and a sliding member 140. The first support member 131 is disposed on the base 110 to realize the installation and fixation of the first support member 131. The support 132 is connected to the first support member 131 to realize the installation of the support 132. The first rotating rod 133 passes through the support 132, and the gear 134 is sleeved on the first rotating rod 133 so that when the first rotating rod 133 rotates relative to the support 132, the first rotating rod 133 can drive the gear 134 to rotate. A rack 138 is provided on one side of the first mounting plate 135. The rack 138 meshes with the gear 134 to realize the installation of the rack 138. When the first rotating rod 133 rotates, the first mounting plate 135 can move along the axial direction of the first support member 131. One end of the second mounting plate 136 is connected to the side of the first mounting plate 135 opposite to the rack 138, and forms an angle with the first mounting plate 135, so that the first mounting plate 135 and the second mounting plate 136 are L-shaped. The lead screw 137 is mounted on the side of the second mounting plate 136 facing the base 110, and can rotate relative to the second mounting plate 136 to realize the installation of the lead screw 137. One end of the slider 140 is connected to the first sleeve 150, and the other end of the slider 140 is engaged with the lead screw 137, enabling it to move along the axial direction of the lead screw 137. The horizontal position of the slider 140 can be adjusted back and forth by rotating the lead screw 137, thereby allowing the slider 140 to adjust the horizontal position of the probe assembly 170 when it moves. When the first rotating member moves, it can adjust the vertical position of the probe assembly 170. By setting the lead screw 137 transmission structure and the gear 134 and rack 138 transmission structure, the vertical and horizontal movement of the slider 140 can be realized, thereby enabling the probe assembly 170 to quickly position and measure the device under test.

[0064] Specifically, the first support component 131 is a rectangular vertical rod.

[0065] Specifically, there are two supports 132, which are fixedly installed on the first support member 131. There is a gap between the two supports 132. The first rotating rod 133 passes through the two supports 132, and the gear 134 is located in the gap. The supports 132 and the first support member 131 are connected by screws to fix the supports 132.

[0066] Specifically, the bracket assembly 130 also includes a rack 138 seat, which is connected to the side of the first mounting plate 135 facing the gear 134. The rack 138 is connected to the rack 138 seat, so that the rack 138 seat can install and fix the rack 138.

[0067] Specifically, the bracket assembly 130 also includes two bearing seats 139, which are connected to the side of the second mounting plate 136 facing the base 110. The lead screw 137 passes through the two bearing seats 139 to realize the installation of the lead screw 137, so that when the lead screw 137 rotates, the sliding member 140 can move along the axial direction of the lead screw 137, thereby realizing the adjustment of the probe assembly 170 in the horizontal direction.

[0068] Specifically, the controllable and fine-tuned movement distance of the test probe is achieved by setting up the bracket assembly 130 and the first mounting assembly 120. The first mounting assembly 120 can clamp the power device under test 700, eliminating test errors caused by minor vibration displacement of the device during the test. The lead screw 137 is used to fine-tune the horizontal position of the probe assembly 170, and the rotation of the first rotating rod 133 is used to fine-tune the vertical distance of the probe module. The entire device adopts an integrated structural design, and the position of the probe assembly 170 is fine-tuned and positioned through a mechanical transmission structure, resulting in more stable test results compared to the test method of directly contacting the test terminal with a handheld probe.

[0069] This embodiment provides a detection component 100, which, in addition to the technical features of the above embodiments, further includes the following technical features.

[0070] like Figure 6 and Figure 7 As shown, the second sleeve 160 includes a cylinder 162 and a first positioning component 164. The cylinder 162 is located inside the first sleeve 150; the first positioning component 164 is located on the side of the cylinder 162 away from the base 110 and is connected to the probe assembly 170.

[0071] In this embodiment, the second sleeve 160 includes a cylinder 162 and a first positioning component 164. The cylinder 162 is located inside the first sleeve 150, so that the first sleeve 150 is fitted onto the cylinder 162, allowing the cylinder 162 to move relative to the first sleeve 150. The first positioning component 164 is located on the side of the cylinder 162 away from the base 110 and is connected to the probe assembly 170 to install the first positioning component 164, so that the first positioning component 164 can fix and position the probe assembly 170, allowing the probe assembly 170 to move together with the cylinder 162.

[0072] This embodiment provides a detection component 100, which, in addition to the technical features of the above embodiments, further includes the following technical features.

[0073] like Figure 7 , Figure 8 , Figure 9 and Figure 10As shown, the probe assembly 170 includes a grounding probe 172 and at least one detection probe 174. The side of the grounding probe 172 away from the base 110 is disposed on the first positioning member 164; the side of the at least one detection probe 174 away from the base 110 is disposed on the first positioning member 164 and is arranged side by side with the grounding probe 172, and can be located away from or close to the grounding probe 172.

[0074] In this embodiment, the probe assembly 170 includes a ground probe 172 and at least one detection probe 174. The side of the ground probe 172 furthest from the base 110 is disposed on the first positioning component 164 for mounting the ground probe 172. The side of the at least one detection probe 174 furthest from the base 110 is disposed on the first positioning component 164 and arranged parallel to the ground probe 172 for mounting the at least one detection probe 174, allowing the first positioning component 164 to fix the mounting position of the at least one detection probe 174. The at least one detection probe 174 can be positioned away from or close to the ground probe 172, allowing the first positioning component 164 to adjust the distance between the at least one detection probe 174 and the ground probe 172. Since the distance between test terminals on different power devices 700 is different, the probe assembly 170 can adjust the distance between the probes accordingly based on the test terminals, thereby adapting to power devices 700 with different package structures, i.e., power devices 700 with different terminal spacing, achieving universal testing requirements for power devices 700.

[0075] Specifically, the first positioning component 164 includes a first guide rail, a second guide rail, a third guide rail, and a fourth guide rail, which are arranged side by side. There is a first gap between the first guide rail and the second guide rail, a second gap between the second guide rail and the third guide rail, and a third gap between the third guide rail and the fourth guide rail. A grounding probe 172 and at least one detection probe 174 are located within the second gap. The grounding probe 172 and at least one detection probe 174 are movable relative to the length direction of the second and third guide rails, making the distance between the grounding probe 172 and at least one detection probe 174 adjustable. This allows for the testing of power devices 700 with different test terminals, such as To-247, To-220, and To-92 package structures.

[0076] Specifically, one end of the grounding probe 172 has a first mounting portion, making the grounding probe 172 cross-shaped. One end of the first mounting portion is located on the first guide rail and the second guide rail, and can slide relative to the first guide rail and the second guide rail. The other end of the first mounting portion is located on the third guide rail and the fourth guide rail, and can slide relative to the third guide rail and the fourth guide rail. When fixing the grounding probe 172, a first bolt is inserted through the first gap into one end of the first mounting portion and connected to the first bolt through the first nut. A second bolt is inserted through the third gap into the other end of the first mounting portion and connected to the second bolt through the second nut. The grounding probe 172 has a cross-shaped structure and is connected to the guide rail by the bolt and nut structure to achieve horizontal sliding and fixing on the guide rail.

[0077] Specifically, at least one detection probe 174 has a second mounting portion at one end, making the at least one detection probe 174 cross-shaped. One end of the second mounting portion is located on the first guide rail and the second guide rail, and can slide relative to the first guide rail and the second guide rail. The other end of the second mounting portion is located on the third guide rail and the fourth guide rail, and can slide relative to the third guide rail and the fourth guide rail. When fixing at least one detection probe 174, a third bolt is inserted through the first gap into one end of the second mounting portion and connected to the third bolt through a third nut. A fourth bolt is inserted through the third gap into the other end of the second mounting portion and connected to the fourth bolt through a fourth nut. The at least one detection probe 174 has a cross-shaped structure and is connected to the guide rail by a bolt and nut structure to achieve horizontal sliding on the guide rail, so as to achieve adjustable and fixed horizontal distance.

[0078] Specifically, the number of probes in the probe assembly 170 can be determined according to actual needs. At least one detection probe 174 includes a first probe 176 and a second probe 178, so that the probe assembly 170 includes three probes: a ground probe 172, a first probe 176, and a second probe 178. The tails of the three probes, ground probe 172, first probe 176, and second probe 178, are designed with an SMA structure for direct interconnection with the input and output ports of the sweep frequency assembly 200. The tips of the ground probe 172, first probe 176, and second probe 178 are interconnected with the test terminals of the power device 700 through ohmic contact. When the tips of the ground probe 172, first probe 176, and second probe 178 are connected to the test terminals, pressure is applied manually. The probe heads of the ground probe 172, first probe 176, and second probe 178 are rigid and non-extensible.

[0079] Specifically, both ends of the first mounting part and the second mounting part are provided with through holes, which facilitates the loosening and locking of the grounding probe 172 and at least one detection probe 174 using a bolt and nut structure.

[0080] The three probes, ground probe 172, first probe 176, and second probe 178, are designed with threaded ends to interconnect the probe assembly 170 and the sweep frequency assembly 200 (e.g., a vector network analyzer or impedance analyzer) with ports 1 (input port) and 2 (output port). First probe 176 and second probe 178 are designed with a conventional 50Ω characteristic impedance (consisting of 50Ω internal traces, an insulating layer, and a metal casing). Ground probe 172 shares a ground with the sweep frequency assembly 200 via the first positioning component 164.

[0081] This embodiment provides a detection component 100, which, in addition to the technical features of the above embodiments, further includes the following technical features.

[0082] like Figure 2 As shown, the second sleeve 160 also includes a limiting post 166, which is located inside the elastic member 182. One end of the limiting post 166 is connected to the bottom wall of the second sleeve 160, and the other end of the elastic member 182 can contact the bottom wall of the first sleeve 150.

[0083] In this embodiment, the second sleeve 160 further includes a limiting post 166, which is located inside the elastic member 182. One end of the limiting post 166 is connected to the bottom wall of the second sleeve 160 to achieve the installation and fixation of the limiting post 166. The other end of the elastic member 182 can contact the bottom wall of the first sleeve 150, so that the limiting post 166 can limit the movement distance of the second sleeve 160 and play the role of limiting the compression distance of the elastic member 182. When the other end of the elastic member 182 can contact the bottom wall of the first sleeve 150, by detecting the pressure value of the elastic member 182, the ohmic contact test requirement of maintaining a good consistency between the contact pressure of the probe terminal and the test terminal can be ensured each time, so as to reduce the measurement error.

[0084] The elastic element 182 is fitted onto the elastic element 182 limiting post 166, limiting the compression of the elastic element 182, thereby ensuring that the pressure applied during each press remains a fixed value. The elastic element 182 is connected to a pressure sensing component 184, which is used to calibrate the initial contact pressure of the probe before pressing down, and also to monitor the pressure value over time, ensuring that the pressure applied during each press remains at a fixed value. This ensures the consistency of the ohmic contact stress between the probe and the device terminal, reducing the error value of the test results.

[0085] A second aspect of the present invention provides a detection method for detecting power devices using the detection components in any of the above embodiments, such as... Figure 11 As shown, the detection methods include:

[0086] S302, depending on the position of the power device, control the detection part of the probe assembly to be opposite to the test terminal of the power device;

[0087] S304, the detection section of the control probe assembly contacts the test terminal of the power device;

[0088] S306, controls the movement of the second sleeve relative to the first sleeve;

[0089] S308, control the contact state between the probe assembly and the power device according to the first pressure value;

[0090] S310 controls the probe assembly to test the power device.

[0091] In this embodiment, based on the position of the power device, the detection section of the probe assembly is positioned relative to the test terminal of the power device. This allows the probe assembly to move closer to the power device, facilitating measurement. By controlling the detection section of the probe assembly to contact the test terminal of the power device, the second sleeve moves relative to the first sleeve. This ensures that the compression of the elastic element after the second sleeve moves is the same as the distance the probe assembly moves relative to the power device. After compression, the first pressure value of the elastic element is detected to determine if the probe assembly has moved to a position with consistent pressure for each measurement. The contact state between the probe assembly and the power device is controlled based on this first pressure value. Once the probe assembly reaches a position with consistent pressure, it is then used to measure the power device. This avoids errors in each measurement and improves the accuracy of power device testing.

[0092] Specifically, before aligning the detection section of the probe assembly with the test terminals of the power device based on its position, the detection method further includes: connecting the probe assembly to the frequency sweep assembly; calibrating the probe assembly using the frequency sweep assembly; and clamping the power device using the first mounting assembly. Connecting the probe assembly to the frequency sweep assembly allows the frequency sweep assembly to calibrate the probe assembly, thereby reducing errors during detection and improving accuracy. Clamping the power device using the first mounting assembly secures the power device, ensuring stability during detection.

[0093] This embodiment provides a detection method, such as Figure 12 As shown, the detection method also includes:

[0094] S402, depending on the position of the power device, control the detection part of the probe assembly to be opposite to the test terminal of the power device;

[0095] S404, controls the detection section of the probe assembly to contact the test terminal of the power device;

[0096] S406, Control pressure detection component detects the initial pressure value of the elastic element when the probe assembly contacts the test terminal of the power device;

[0097] S408 controls the movement of the second sleeve relative to the first sleeve;

[0098] S410, controls the contact state between the probe assembly and the power device according to the first pressure value;

[0099] S412 controls the probe assembly to test the power device.

[0100] In this embodiment, before the second sleeve moves relative to the first sleeve, the pressure detection component detects the initial pressure value of the elastic element when the probe assembly contacts the test terminal of the power device. This prevents the spring from being compressed before the second sleeve moves relative to the first sleeve, thereby further ensuring the accuracy of the pressure detection component's detection of the elastic element's pressure value after the second sleeve moves relative to the first sleeve. This ensures that the probe terminal can move to a position with consistent detection pressure each time, reducing detection errors. The pressure detection component can be used to calibrate the initial pressure value when the probe assembly contacts the test terminal.

[0101] In one embodiment of the present invention, if the first pressure value is equal to the first pressure threshold, the probe assembly is controlled to detect the power device; if the first pressure value is greater than or less than the first pressure threshold, the initial pressure value of the elastic element is calibrated.

[0102] In this embodiment, after the elastic element is compressed, if the first pressure value equals the first pressure threshold, the probe terminals of the probe assembly have moved to a position with consistent pressure, and the probe assembly is controlled to detect the power device. If the first pressure value is greater than or less than the first pressure threshold, the probe terminals of the probe assembly are not in a position with consistent pressure after the elastic element is compressed. In this case, the initial pressure value of the elastic element needs to be calibrated. The second sleeve is then controlled to move relative to the first sleeve so that the probe terminals of the probe assembly move to a position with consistent pressure. This ensures that the probe terminals are in a position with consistent pressure every time the power device is detected, thereby reducing measurement errors.

[0103] This embodiment provides a detection method, such as Figure 13 As shown, the detection method also includes:

[0104] S502, Obtain the location of the power device;

[0105] S504, based on the position of the power device, controls the slider to drive the probe assembly to the position of the power device;

[0106] S506, Obtain the position of the test terminal;

[0107] S508, adjust the spacing between the grounding probe and at least one detection probe according to the position of the test terminal;

[0108] S510, controls the detection section of the probe assembly to contact the test terminal of the power device;

[0109] S512 controls the movement of the second sleeve relative to the first sleeve;

[0110] S514, control the contact state between the probe assembly and the power device according to the first pressure value;

[0111] S516 controls the probe assembly to test power devices.

[0112] In this embodiment, the position of the power device is obtained; based on the position of the power device, the slider is controlled to move the probe assembly to the position of the power device, thereby allowing the probe assembly to move close to the power device. The position of the test terminal is obtained, and the spacing between the grounding probe and at least one detection probe is adjusted according to the position of the test terminal. Since the distance between the test terminals on different power devices is different, the probe assembly can adjust the distance between the probes accordingly based on the test terminals, thereby enabling the detection of different power devices.

[0113] This embodiment provides a detection method, such as Figure 14 As shown, the detection method also includes:

[0114] S602, the control probe assembly is connected to the frequency sweep assembly;

[0115] S604 controls the frequency sweep component to calibrate the probe component;

[0116] S606 controls the first mounting component to clamp the power device;

[0117] S608, depending on the position of the power device, controls the detection section of the probe assembly to be aligned with the test terminal of the power device;

[0118] S610, controls the detection section of the probe assembly to contact the test terminal of the power device;

[0119] S612, the initial pressure value of the elastic element when the calibration probe assembly of the control pressure detection component comes into contact with the test terminal of the power device;

[0120] S614 controls the movement of the second sleeve relative to the first sleeve;

[0121] S616, determine whether the displayed value of the pressure detection component is a fixed value. If yes, execute S618; otherwise, execute S610.

[0122] S618 controls the probe assembly to detect power devices;

[0123] S620: Obtain the detection results of the power device by the frequency sweep component.

[0124] In this embodiment, during the testing process, pressing down the handle of the second sleeve allows it to move relative to the first sleeve. After movement, it is determined whether the displayed value of the pressure detection component on the elastic element is a fixed value. If the displayed value is fixed, it indicates that the probe assembly has moved to a position with consistent pressure relative to the power device, and the power device can then be tested. If the displayed value is not fixed, it indicates that the probe assembly has not moved to a position with consistent pressure relative to the power device. In this case, it is necessary to re-control the probe assembly's detection part to contact the test terminal of the power device to calibrate the initial pressure value of the elastic element when the probe assembly contacts the test terminal of the power device, thereby ensuring that the probe assembly is in a position with consistent pressure during each test.

[0125] In the claims, description, and accompanying drawings of this invention, the term "plural" refers to two or more. Unless otherwise explicitly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and simplifying the descriptive process, and are not intended to indicate or imply that the device or element referred to must have the described specific orientation, or be constructed and operated in a specific orientation. Therefore, these descriptions should not be construed as limiting the invention. The terms "connected," "installed," "fixed," etc., should be interpreted broadly. For example, "connected" can be a fixed connection between multiple objects, a detachable connection between multiple objects, or an integral connection; it can be a direct connection between multiple objects or an indirect connection between multiple objects through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this invention can be understood based on the specific circumstances described above.

[0126] In the claims, description, and accompanying drawings of this invention, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In the claims, description, and accompanying drawings of this invention, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0127] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A detection component, characterized in that, The detection component is connected to the frequency sweep component and is used to detect the power device. The detection component includes: Base; A first mounting component is disposed on the base; A support assembly disposed on the base; A first sleeve is connected to the support assembly and is movable relative to the support assembly; The second sleeve is connected to the first sleeve and is movable relative to the first sleeve; A probe assembly, wherein the probe assembly is connected to the first sleeve; A pressure detection assembly, comprising a pressure detection component and an elastic element; One end of the elastic element is connected to the second sleeve, and the other end of the elastic element is connected to the first sleeve; When the power device is being tested, the power device is placed on the first mounting assembly, and the pressure detection component can detect the first pressure value of the elastic element to control the contact state between the probe assembly and the power device. The bottom wall of the first sleeve is provided with a mounting groove, the opening of the mounting groove faces the elastic member, the mounting groove is recessed away from the first sleeve, and one end of the elastic member is located in the mounting groove; The second sleeve includes: A limiting post is located inside the elastic member. One end of the limiting post is connected to the bottom wall of the second sleeve, and the other end of the elastic member can contact the bottom wall of the first sleeve. A handle is provided at the end of the second sleeve away from the elastic element, and the movement of the second sleeve relative to the first sleeve is controlled by pressing the handle.

2. The detection component according to claim 1, characterized in that, The support assembly includes: A first support component is disposed on the base; The support is connected to the first support component; A first rotating rod, which passes through the support; Gear, the gear being sleeved on the first rotating rod; A first mounting plate, wherein a rack is provided on one side of the first mounting plate, and the rack meshes with the gear; A second mounting plate, one end of which is connected to the side of the first mounting plate away from the rack, and forms an angle with the first mounting plate; A lead screw, which is mounted on the side of the second mounting plate facing the base and is rotatable relative to the second mounting plate; A sliding member, one end of which is connected to the first sleeve, and the other end of which is engaged with the lead screw, enabling it to move along the axial direction of the lead screw.

3. The detection component according to claim 1, characterized in that, The second sleeve also includes: A cylindrical body, which is located inside the first sleeve; A first positioning component is located on the side of the cylinder away from the base and is connected to the probe assembly.

4. The detection component according to claim 3, characterized in that, The probe assembly: A grounding probe, wherein the side of the grounding probe away from the base is disposed on the first positioning component; At least one detection probe is disposed on the side of the first positioning component away from the base and is arranged in parallel with the grounding probe, and can be moved away from or close to the grounding probe.

5. A detection method, characterized in that, The power device is tested using the detection component according to any one of claims 1 to 4, the detection method comprising: Based on the position of the power device, the detection section of the probe assembly is controlled to be aligned with the test terminal of the power device; The detection section of the probe assembly is controlled to contact the test terminal of the power device; Control the movement of the second sleeve relative to the first sleeve; The contact state between the probe assembly and the power device is controlled according to the first pressure value; The probe assembly is controlled to detect the power device.

6. The detection method according to claim 5, characterized in that, Before controlling the movement of the second sleeve relative to the first sleeve, the detection method further includes: The pressure detection component is controlled to detect the initial pressure value of the elastic element when the probe assembly comes into contact with the test terminal of the power device.

7. The detection method according to claim 6, characterized in that, If the first pressure value is equal to the first pressure threshold, the probe assembly is controlled to detect the power device; If the first pressure value is greater than or less than the first pressure threshold, calibrate the initial pressure value of the elastic element.

8. The detection method according to any one of claims 5 to 7, characterized in that, Based on the position of the power device, controlling the detection section of the probe assembly to be aligned with the test terminal of the power device includes: Obtain the position of the power device; Based on the position of the power device, control the slider to move the probe assembly to the position of the power device; Obtain the position of the test terminal; Adjust the spacing between the grounding probe and at least one detection probe according to the position of the test terminal.

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