Frequency domain measurement device

Abstract

The utility model provides frequency domain measuring equipment, which is used for measuring frequency domain parameters of a power device and comprises a base, a frequency domain measuring device and a frequency domain measuring device, the pressure feedback platform is arranged on the base, the pressure feedback platform comprises an object bearing table and a pressure sensor, the object bearing table is used for bearing the power device, and the pressure sensor is arranged on the object bearing table and used for detecting pressure applied to the object bearing table by the power device located on the object bearing table; the driving assembly is arranged on the base; the probe assembly is connected with the driving assembly, and the probe assembly comprises a probe; the data analyzer is connected with the probe assembly; wherein the driving assembly is used for driving the probe assembly to move relative to the pressure feedback platform, so that the probe is connected with or separated from the terminal of the power device, and under the condition that the probe is connected with the terminal and a pressure detection value detected by the pressure sensor reaches a preset pressure value, the data analyzer detects frequency domain parameters of the power device. The frequency domain measurement equipment provided by the utility model is simpler in measurement process.

Description

Technical Field

[0001] The utility model relates to the technical field of device measurement, in particular to a frequency domain measurement device. Background Art

[0002] In the related art, frequency-domain measurements of power devices require the use of a soldering fixture to ensure impedance matching between the measurement equipment and the power device. Each frequency-domain measurement requires the power device to be re-soldered to the fixture. Power devices have high power density and are integrated into a copper-framed package substrate with excellent heat dissipation. The drain terminal and substrate are integrally formed. This requires a soldering iron temperature exceeding 350°C to ensure melting of the solder, posing a risk of device damage.

[0003] After completing frequency-domain measurements, the device must be disassembled a second time to ensure that all three terminals reach the solder melting temperature simultaneously before being removed from the measurement fixture. This is extremely inconvenient and time-consuming. Furthermore, frequent device disassembly can easily lead to solder buildup, cracking, and substrate separation in the measurement fixture, damaging it and introducing measurement errors. The complexity of using the measurement fixture also hinders rapid frequency-domain measurement of power devices. Utility Model Content

[0004] The utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0005] In view of this, the present invention proposes a frequency domain measurement device for measuring frequency domain parameters of a power device, the frequency domain measurement device comprising: a base; a pressure feedback platform, arranged on the base, the pressure feedback platform comprising a support platform and a pressure sensor, the support platform being used to support the power device, the pressure sensor being arranged on the support platform, and being used to detect the pressure applied by the power device located on the support platform to the support platform; a drive assembly, arranged on the base; a probe assembly, connected to the drive assembly, the probe assembly comprising a probe; a data analyzer, connected to the probe assembly; wherein the drive assembly is used to drive the probe assembly to move relative to the pressure feedback platform so that the probe is connected to or separated from the terminal of the power device, and when the probe is connected to the terminal and the pressure detection value detected by the pressure sensor reaches a preset pressure value, the data analyzer detects and obtains the frequency domain parameters of the power device.

[0006] The frequency domain measurement equipment proposed in this utility model is intended to realize accurate and efficient frequency domain measurement of power devices, thereby obtaining the frequency domain parameters of the power devices, and then obtaining the electrical characteristic parameters of the power devices in the frequency domain, reflecting the working status and performance of the power devices at different frequencies.

[0007] The frequency domain measurement equipment consists of a base, a pressure feedback platform, a drive assembly, a probe assembly, and a data analyzer. The base is the supporting structure of the entire measurement equipment, providing a solid foundation to ensure stable installation and operation of other components.

[0008] The pressure feedback platform includes a support platform and a pressure sensor. The support platform is located on a base and is used to support the power device under test. The pressure sensor is located on the support platform. Specifically, the pressure sensor can be embedded in the support platform or tightly connected to the support platform. The pressure sensor is used to detect the pressure applied by the power device on the support platform.

[0009] When the probe is connected to the terminal of the power device, the pressure sensor can provide real-time feedback on the size of the contact pressure, thereby understanding the connection status of the probe and the terminal of the power device, and knowing whether the probe and the terminal of the power device are tightly connected, thereby ensuring the accuracy and reliability of the measurement.

[0010] The drive assembly is mounted on the base and is used to drive the probe assembly relative to the pressure feedback platform. The drive assembly enables precise movement and positioning of the probe assembly. The probe assembly is connected to the drive assembly and includes a probe.

[0011] The probe is a component used to contact the terminals of the power device and is made of conductive material. The data analyzer is connected to the probe assembly and is used to provide a continuous frequency sweep signal, specifically, to send a continuous frequency sweep signal through the probe.

[0012] The data analyzer can also receive and process the signal about the power device fed back from the probe.

[0013] The data analyzer has high-speed frequency domain data acquisition and analysis capabilities, and can measure and analyze the signals fed back by power devices in real time to obtain frequency domain parameters of the power range. Specifically, the frequency domain parameters include the frequency domain feedback curve.

[0014] The frequency domain measurement device proposed in this utility model uses a drive assembly to drive a probe assembly relative to a pressure feedback platform, bringing the probe into close contact with the terminals of a power device. During this contact process, a pressure sensor detects the contact pressure in real time. When the contact pressure reaches a preset pressure value, it indicates that the probe and the power device terminals are in contact, allowing accurate data analysis. Therefore, a data analyzer begins frequency sweeping to detect and obtain the frequency domain parameters of the power device. Specifically, the data analyzer obtains a frequency domain feedback curve for the power device. Furthermore, the drive assembly stops driving at this point.

[0015] Specifically, the contact pressure reaches a preset pressure value, which means that a pressure detection value of the pressure sensor is equal to the preset pressure value.

[0016] The frequency domain measurement equipment proposed in this utility model adopts a voltage-controlled frequency domain reflection measurement scheme, which replaces the traditional welding frequency domain reflection measurement scheme, greatly reducing the measurement complexity, saving measurement time, and avoiding the damage risk and measurement error that may be caused during the welding process.

[0017] Through pressure feedback regulation, the utility model can accurately control the contact pressure and contact angle between the probe and the power device terminal, which helps to control the contact resistance between the two, thereby ensuring the repeatability of multiple measurements.

[0018] Since the welding process is avoided, the utility model can extend the service life of the measuring fixture and reduce aging and damage of the fixture caused by welding.

[0019] In summary, the frequency domain measurement device proposed in the present invention has fast and accurate measurement capabilities and can complete the frequency domain parameter measurements of multiple power devices in a short time, which helps to improve production efficiency and product quality.

[0020] In addition, the frequency domain measurement device in the above technical solution provided by the present invention may also have the following additional technical features:

[0021] In some technical solutions, optionally, the pressure sensor is also used to display the pressure detection value.

[0022] In this technical solution, the frequency domain measurement device proposed in the present invention is capable of providing data for manual operation by the user. Specifically, the pressure sensor is not only used to detect the pressure applied by the power device to the support platform, but also to display this pressure detection value in real time. This function provides the user with the convenience of manual adjustment, allowing the user to intuitively observe the value displayed in the pressure sensor area and control the movement of the drive component accordingly, thereby accurately adjusting the contact pressure between the probe and the power device terminal. The above design improves the scope of application of the equipment and can fully meet the user's frequency domain measurement needs.

[0023] In some technical solutions, optionally, the driving assembly includes: a motor; a roller screw, the roller screw includes a screw and a slider, the screw is connected to the motor, and the slider is arranged on the screw; a slide is arranged on the base, the slide is provided with a guide rail extending along the height direction of the pressure feedback platform, and the slider is slidably connected to the guide rail; the screw is arranged in the guide rail, and the probe assembly is connected to the slider; the motor can drive the screw to rotate so that the slider slides on the screw and the guide rail.

[0024] In this technical solution, the drive assembly is an assembly that integrates a motor, a roller screw, and a slide. The motor serves as the power source of the entire drive assembly and is used to provide power output.

[0025] The roller screw consists of a lead screw and a slider. The lead screw is connected to the motor, and when the motor rotates, the lead screw rotates with it. The slider is mounted on the lead screw and forms rolling friction contact with the lead screw. As the lead screw rotates, the slider slides along its axis. The slide is equipped with a guide rail, a linear track extending along the height of the pressure feedback platform. The slider is mounted on the guide rail, providing a stable and low-friction sliding path for the slider.

[0026] The probe assembly is connected to the slider so that when the slider slides on the guide rail, the probe assembly moves with it.

[0027] During the operation of the drive assembly, when the position of the probe assembly needs to be adjusted, the control motor is activated. The motor rotates, driving the screw. As the screw rotates, the slider slides along the screw's spiral trajectory. Because the slider is mounted on a guide rail, it moves simultaneously on the guide rail. When the slider moves, the probe assembly connected to it also moves with it, thereby adjusting the position of the probe assembly. Specifically, the probe assembly can be adjusted up and down along the height of the pressure feedback platform.

[0028] The high precision and stable rolling friction of the roller screw provide a smooth and accurate driving force. The probe assembly moves toward the pressure feedback platform at a constant speed and smooth acceleration, ensuring accurate and reliable measurements.

[0029] The motor is the power source, and its speed and direction can be precisely adjusted by the controller. This allows users to easily control the motion trajectory and speed of the probe assembly to accommodate power devices of different sizes and characteristics.

[0030] Compared to other high-precision drive solutions (such as pneumatic or hydraulic drives), roller screw drives have lower costs. This makes frequency domain measurement equipment more cost-effective while maintaining high accuracy and stability.

[0031] In some technical solutions, optionally, the probe assembly further includes: a connecting arm connected to the driving assembly; a first clamp connected to the connecting arm, and the first clamp clamps the probe.

[0032] In this technical solution, the probe assembly also includes a connecting arm and a first clamp. The connecting arm serves as a connection and transmission mechanism. It connects to the drive assembly, acting as a bridge between the two, transmitting the drive assembly's power and motion to the probe. Through the connecting arm, the drive assembly can precisely control the probe's trajectory and speed.

[0033] Through precise control and gripping of the connecting arm and the first fixture, the probe accurately contacts the power device's terminals and establishes a stable electrical connection. Simultaneously, the data analyzer acquires, processes, and analyzes the device's frequency domain data through the probe, enabling accurate measurement of the device's frequency domain parameters.

[0034] In some technical solutions, optionally, the probe assembly further includes: a cable, one end of the cable is connected to the probe, and the other end of the cable is connected to the data analyzer.

[0035] In this technical solution, the probe assembly also includes a cable, which is the data transmission component. One end of the cable is connected to the probe, and the other end is connected to the data analyzer. The cable is used to transmit the electrical signal acquired by the probe to the data analyzer and also helps the data analyzer generate the sweep signal.

[0036] In some technical solutions, optionally, the probe assembly further includes: a bracket, which is arranged on the connecting arm, and a supporting portion is provided on the bracket, and the supporting portion abuts against the cable to support the cable.

[0037] In this technical solution, the probe assembly of the frequency domain measurement device further includes a bracket, which is a fixed structure arranged on the connecting arm. The support portion is a part of the bracket, which is arc-shaped or groove-shaped to match the shape of the cable.

[0038] The support's primary function is to support the cable, preventing it from sagging, twisting, or fraying during measurement. Placing the cable on the support ensures it maintains a stable shape and position during signal transmission, improving measurement accuracy and reliability.

[0039] In some technical solutions, optionally, the frequency domain measurement device further includes: a control component electrically connected to the pressure sensor and the driving component, respectively, for controlling the operation of the driving component according to the detection result of the pressure sensor.

[0040] In this technical solution, the frequency domain measurement device also includes a control component, which is electrically connected to the drive component and the pressure sensor. The control component can control the operation of the drive component according to the pressure detection value of the pressure sensor to realize automated measurement of the frequency domain measurement device.

[0041] The control component controls the pressure sensor to perform pressure detection. If the pressure detection value is less than the preset pressure value, the control component controls the drive component to move closer to the pressure feedback platform. During the movement, the probe gradually approaches the terminal of the power device. The probe assembly continues to obtain pressure detection values ​​during its movement. When the pressure detection value reaches the preset pressure value, indicating that the probe is in close contact with the terminal of the power device, the control component stops driving.

[0042] Specifically, the control component includes a touch screen display, which can perform corresponding operations when touched by a user, so that the user can perform manual operations.

[0043] The touch screen can also display control parameters to keep users informed of the control process.

[0044] In some technical solutions, optionally, the support platform includes: a support surface; a second clamp, arranged on the support surface, the second clamp is used to clamp the power device; the pressure sensor is arranged in the support platform, and at least part of the pressure sensor is passed through the support surface and connected to the second clamp.

[0045] In this technical solution, the support platform is further defined. The support surface is the main part of the support platform, which is used to directly support and carry the power device. Specifically, the support surface is flat to ensure that the power device can be stably placed on it and facilitate subsequent testing or operation.

[0046] The second fixture is positioned on the support surface, opposite the pressure sensor. Its primary function is to clamp the power device, ensuring it is stably secured to the support platform for subsequent testing or operation. By clamping the power device, the second fixture prevents it from moving or shifting during testing, thereby improving test accuracy and stability. At least some of the pressure sensors are positioned through the support surface and connected to the second fixture, enabling accurate detection of the force applied by the power device.

[0047] In some technical solutions, optionally, the frequency domain measurement device further includes: a fixing frame, which is arranged on the base; and a fixing member, which passes through the fixing frame and has one end abutting against the pressure feedback platform.

[0048] In this technical solution, the frequency domain measurement device further includes a fixing component, specifically, the frequency domain measurement device further includes a fixing frame and a fixing member. The fixing frame is arranged on the base. The fixing member is inserted into the fixing frame.

[0049] One end of the fixing piece is in contact with the pressure feedback platform, and the pressure feedback platform is firmly fixed on the fixing frame by applying a certain pressure or clamping force.

[0050] The fixing function of the fixing piece can prevent the pressure feedback platform from moving or deflecting during the measurement process, thereby ensuring the continuity and accuracy of the measurement.

[0051] In some technical solutions, optionally, the frequency domain measurement device further includes: a plurality of supporting legs, wherein the plurality of supporting legs are spaced apart and arranged on a side of the base away from the pressure feedback platform.

[0052] In this technical solution, the frequency domain measurement device also includes multiple legs, spaced apart on the side of the base facing away from the pressure feedback platform, providing stable support for the entire measurement device. The legs allow the device to rest stably on a work surface, preventing it from tilting or collapsing due to an unstable center of gravity.

[0053] Additional aspects and advantages of the present invention will become apparent in the following description or will be understood through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0055] Figure 1 FIG1 shows one of the structural schematic diagrams of the frequency domain measurement device in an embodiment of the present utility model;

[0056] Figure 2 FIG2 shows a second structural diagram of the frequency domain measurement device in an embodiment of the present utility model;

[0057] Figure 3 One of the structural diagrams of the drive assembly in the embodiment of the present utility model is shown;

[0058] Figure 4 The second structural diagram of the driving assembly in the embodiment of the present utility model is shown;

[0059] Figure 5 The third structural diagram of the driving assembly in the embodiment of the present utility model is shown;

[0060] Figure 6 FIG2 shows a schematic structural diagram of a pressure feedback platform in an embodiment of the present utility model;

[0061] Figure 7 FIG2 shows a schematic structural diagram of the second clamp in an embodiment of the present utility model;

[0062] Figure 8 A schematic structural diagram of a connecting arm of a probe assembly in an embodiment of the present utility model is shown;

[0063] Figure 9 A schematic structural diagram of a first clamp of a probe assembly in an embodiment of the present utility model is shown;

[0064] Figure 10 A schematic structural diagram of a probe assembly in an embodiment of the present utility model is shown;

[0065] Figure 11 A schematic structural diagram of a bracket of a probe assembly in an embodiment of the present utility model is shown;

[0066] Figure 12 A schematic structural diagram of a base in an embodiment of the present utility model is shown;

[0067] Figure 13 A schematic structural diagram of a power device in an embodiment of the present utility model is shown;

[0068] in, Figures 1 to 13 The corresponding relationship between the reference numerals and components is as follows:

[0069] 110 base, 120 pressure feedback platform, 122 object support platform, 124 bearing surface, 126 second fixture, 128 pressure sensor, 130 drive assembly, 132 motor, 134 roller screw, 136 lead screw, 138 slider, 140 slide, 142 guide rail, 144 coupling, 150 probe assembly, 152 probe, 154 connecting arm, 156 first fixture, 158 housing, 160 connector, 162 cable, 164 bracket, 166 support part, 170 data analyzer, 180 control assembly, 190 fixing frame, 192 fixing part, 194 support leg, 200 power device, 202 terminal. DETAILED DESCRIPTION

[0070] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0071] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0072] Refer to the following Figures 1 to 13 The present invention describes a frequency domain measurement device provided according to some embodiments of the present invention.

[0073] like Figure 1 and Figure 2As shown, in one embodiment of the present invention, a frequency domain measurement device is proposed for measuring the frequency domain parameters of a power device 200. The frequency domain measurement device includes: a base 110; a pressure feedback platform 120, which is arranged on the base 110, and the pressure feedback platform 120 includes a support 122 and a pressure sensor 128. The support 122 is used to support the power device 200, and the pressure sensor 128 is arranged on the support 122 to detect the pressure applied by the power device 200 located on the support 122 to the support 122; a driving component 130, which is arranged On the base 110; the probe assembly 150 is connected to the drive assembly 130, and the probe assembly 150 includes a probe 152; the data analyzer 170 is connected to the probe assembly 150; wherein the drive assembly 130 is used to drive the probe assembly 150 to move relative to the pressure feedback platform 120 so that the probe 152 is connected to or separated from the terminal 202 of the power device 200. When the probe 152 is connected to the terminal 202 and the pressure detection value detected by the pressure sensor 128 reaches a preset pressure value, the data analyzer 170 detects the frequency domain parameters of the power device 200.

[0074] In this embodiment, the frequency domain measurement equipment proposed in the present invention is intended to achieve accurate and efficient frequency domain measurement of the power device 200, thereby obtaining frequency domain parameters, and then obtaining the electrical characteristic parameters of the power device 200 in the frequency domain, reflecting the working status and performance of the power device 200 at different frequencies.

[0075] like Figure 6 and Figure 12 As shown, the frequency domain measurement device includes a base 110, a pressure feedback platform 120, a drive assembly 130, a probe assembly 150, and a data analyzer 170. The base 110 is the supporting structure of the entire measurement device and provides a stable foundation to ensure that other components can be stably installed and operated.

[0076] The pressure feedback platform 120 includes a support 122 and a pressure sensor 128. The support 122 is located on the base 110 and is used to support the power device 200 to be tested. The pressure sensor 128 is disposed on the support 122. Specifically, the pressure sensor 128 can be embedded in the support 122 or tightly connected to the support 122 to detect the pressure applied by the power device 200 to the support 122.

[0077] When the probe 152 is connected to the terminal 202 of the power device 200, the pressure sensor 128 can provide real-time feedback on the size of the contact pressure, thereby understanding the connection status between the probe 152 and the terminal 202 of the power device 200, and knowing whether the probe 152 and the terminal 202 of the power device 200 are tightly connected, thereby ensuring the accuracy and reliability of the measurement.

[0078] The drive assembly 130 is disposed on the base 110 and is used to drive the probe assembly 150 to move relative to the pressure feedback platform 120. The drive assembly 130 can achieve precise movement and positioning of the probe assembly 150. The probe assembly 150 is connected to the drive assembly 130 and includes a probe 152.

[0079] like Figure 10 and Figure 13 As shown, the probe 152 is a component for contacting the terminal 202 of the power device 200 and is made of a conductive material. The data analyzer 170 is connected to the probe assembly 150 and is used to provide a continuous frequency sweep signal, specifically, to send a continuous frequency sweep signal through the probe 152.

[0080] The data analyzer 170 may also receive and process signals related to the power device 200 fed back from the probe 152 .

[0081] The data analyzer 170 has high-speed frequency domain data acquisition and analysis capabilities, and can measure and analyze the signal fed back by the power device 200 in real time to obtain frequency domain parameters.

[0082] The frequency domain measurement device proposed in the present invention uses a drive assembly 130 to drive a probe assembly 150 relative to a pressure feedback platform 120, bringing the probe 152 into close contact with the terminal 202 of the power device 200. During the contact process, the pressure sensor 128 detects the contact pressure in real time. When the contact pressure reaches a preset pressure value, it indicates that the probe 152 is in contact with the terminal 202 of the power device 200. At this point, accurate data analysis can be performed. Therefore, the data analyzer 170 begins frequency sweeping to detect and obtain the frequency domain parameters of the power device 200. In addition, the drive assembly 130 stops driving at this time.

[0083] Specifically, the frequency domain parameters include a frequency domain feedback curve, which can intuitively display the response characteristics and performance of the power device at different frequencies.

[0084] The frequency domain measurement equipment proposed in this utility model adopts a voltage-controlled frequency domain reflection measurement scheme, which replaces the traditional welding frequency domain reflection measurement scheme, greatly reducing the measurement complexity, saving measurement time, and avoiding the damage risk and measurement error that may be caused during the welding process.

[0085] Through pressure feedback regulation, the present invention can accurately control the contact pressure and contact angle between the probe 152 and the terminal 202 of the power device 200, which helps to control the contact resistance between the two, thereby ensuring the repeatability of multiple measurements.

[0086] Since the welding process is avoided, the utility model can extend the service life of the measuring fixture and reduce aging and damage of the fixture caused by welding.

[0087] In summary, the frequency domain measurement device proposed in the present invention has fast and accurate measurement capabilities, and can complete the frequency domain parameter measurement of multiple power devices 200 in a short time, which helps to improve production efficiency and product quality.

[0088] Specifically, the data analyzer 170 includes a display panel capable of displaying frequency domain parameters of the power device 200 .

[0089] like Figure 1 and Figure 6 As shown, in some embodiments, optionally, the pressure sensor 128 is also used to display the pressure detection value.

[0090] In this embodiment, the frequency domain measurement device proposed in the present invention is capable of providing data for manual operation by the user. Specifically, the pressure sensor 128 is not only used to detect the pressure applied by the power device 200 to the support platform 122, but also used to display this pressure detection value in real time. This function provides the user with the convenience of manual adjustment, allowing the user to intuitively observe the value displayed in the pressure sensor 128 area, and control the movement of the drive component 130 accordingly, thereby accurately adjusting the contact pressure between the probe 152 and the terminal 202 of the power device 200. The above design improves the scope of application of the equipment and can fully meet the user's frequency domain measurement needs.

[0091] For example, assume that the frequency domain parameters of a power device 200 are measured. First, the device is placed on the support table 122 and the device is started. Then, the value displayed by the pressure sensor 128 is observed, and it is found that the pressure detection value is lower than the preset pressure value, such as 5N. Therefore, the movement of the drive component 130 is manually controlled to make the probe 152 contact with the terminal 202 of the power device 200, and the contact pressure between the probe 152 and the power device 200 gradually increases. When the value displayed by the pressure sensor 128 reaches 5N, it is considered that this is a suitable contact pressure range, the probe 152 is in contact with the terminal 202 of the power device 200, and the frequency domain parameter measurement is started.

[0092] During the measurement process, through the display design of the pressure sensor 128, the user can flexibly adjust the contact pressure according to actual conditions, thereby ensuring the accuracy and reliability of the measurement results.

[0093] Specifically, the pressure sensor 128 is provided with a display module, which can display the pressure detection value.

[0094] Specifically, the pressure sensor 128 further includes an operating module, which can adjust the display mode of the display module, such as day mode or night mode, to facilitate user reading.

[0095] Specifically, the pressure sensor 128 is disposed inside the object support platform 122 , and a display module of the pressure sensor 128 protrudes from the object support platform 122 and is located outside the object support platform 122 , thereby facilitating the display of the pressure detection value.

[0096] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, in some embodiments, optionally, the drive assembly 130 includes: a motor 132; a roller screw 134, the roller screw 134 includes a screw 136 and a slider 138, the screw 136 is connected to the motor 132, and the slider 138 is arranged on the screw 136; a slide 140, which is arranged on the base 110, and the slide 140 is provided with a guide rail 142 extending along the height direction of the pressure feedback platform 120, and the slider 138 is slidably connected to the guide rail 142; the screw 136 is arranged in the guide rail 142, and the probe assembly 150 is connected to the slider 138; the motor 132 can drive the screw 136 to rotate so that the slider 138 slides on the screw 136 and the guide rail 142.

[0097] In this embodiment, the drive assembly 130 is an assembly that integrates a motor 132, a roller screw 134, and a slide 140. The motor 132 serves as a power source for the entire drive assembly 130 and is used to provide power output.

[0098] The roller screw 134 consists of a screw rod 136 and a slider 138. The screw rod 136 is connected to the motor 132. When the motor 132 rotates, the screw rod 136 also rotates. The slider 138 is set on the screw rod 136 and forms a rolling friction contact with the screw rod 136. When the screw rod 136 rotates, the slider 138 slides on the screw rod 136 along its axial direction. The slide 140 is provided with a guide rail 142. The guide rail 142 is along the height direction of the pressure feedback platform 120 (such as Figure 6 The slider 138 is arranged on the guide rail 142, thereby providing a stable and low-friction sliding path for the slider 138.

[0099] The probe assembly 150 is connected to the slider 138 so that when the slider 138 slides on the guide rail 142, the probe assembly 150 also moves therewith.

[0100] During the operation of the drive assembly 130, when the position of the probe assembly 150 needs to be adjusted, the control motor 132 is started. After the motor 132 rotates, it drives the screw rod 136 to rotate. As the screw rod 136 rotates, the slider 138 slides along the spiral trajectory of the screw rod 136. Since the slider 138 is set on the slide rail, the slider 138 will move on the guide rail 142 at the same time. When the slider 138 moves, the probe assembly 150 connected thereto will also move accordingly, thereby realizing the adjustment of the position of the probe assembly 150. Specifically, the probe assembly 150 is adjusted up and down along the height direction of the pressure feedback platform 120.

[0101] Since the roller screw 134 has high precision and stable rolling friction characteristics, it can provide a smooth and accurate driving force. The probe assembly 150 can move toward the pressure feedback platform 120 at a constant speed and smooth acceleration, thereby ensuring the accuracy and reliability of the measurement.

[0102] The motor 132 serves as a power source, and its rotation speed and direction can be precisely adjusted by a controller, which allows the user to easily control the motion trajectory and speed of the probe assembly 150 to adapt to power devices 200 of different sizes and characteristics.

[0103] Compared to other high-precision drive solutions (such as pneumatic or hydraulic drives), the roller screw 134 drive has a lower cost. This makes the frequency domain measurement equipment more cost-effective while maintaining high accuracy and stability.

[0104] Specifically, the motor 132 is a stepper motor, which is an electric motor that converts an electrical pulse signal into a corresponding angular displacement or linear displacement.

[0105] The motor 132 includes a body and an output shaft. The body can drive the output shaft to rotate. The output shaft is connected to the screw rod 136, thereby driving the screw rod 136 to rotate.

[0106] Specifically, the driving assembly 130 further includes a coupling 144 , which connects the output shaft and the screw rod 136 respectively to achieve power transmission.

[0107] like Figure 1 、 Figure 2 、 Figure 8 、 Figure 9 and Figure 10 As shown, in some embodiments, optionally, the probe assembly 150 further includes: a connecting arm 154 connected to the driving assembly 130 ; and a first clamp 156 connected to the connecting arm 154 , the first clamp 156 clamping the probe 152 .

[0108] In this embodiment, probe assembly 150 further includes a connecting arm 154 and a first clamp 156. Connecting arm 154 serves as a connection and transmission mechanism. Connecting arm 154 is connected to drive assembly 130, serving as a bridge between probe assembly 150 and drive assembly 130, transmitting the power and motion of drive assembly 130 to probe 152. Through connecting arm 154, drive assembly 130 can precisely control the trajectory and speed of probe 152.

[0109] Specifically, the connecting arm 154 is detachably connected to the driving assembly 130 , thereby facilitating installation and separation between the probe assembly 150 and the driving assembly 130 .

[0110] Specifically, the connecting arm 154 is connected to the slider 138 of the driving assembly 130 .

[0111] Specifically, the connecting arm 154 is connected to the slider 138 of the driving assembly 130 via bolts.

[0112] The first clamp 156 is an important component of the probe assembly 150, which is used to clamp the probe 152 and ensure the stability and accuracy of the probe 152 during the measurement process. Through the first clamp 156, the probe 152 can be firmly fixed on the connecting arm 154, thereby preventing it from falling off or deflecting during the measurement process.

[0113] Specifically, the first clamp 156 includes a spring clamp, a threaded clamp, etc. to ensure that the probe 152 can be firmly clamped.

[0114] Through precise control and clamping of the connecting arm 154 and the first fixture 156, the probe 152 can accurately contact the terminal 202 of the power device 200 and establish a stable electrical connection. Simultaneously, the data analyzer 170 acquires frequency domain data of the power device 200 through the probe 152, processes and analyzes it, and thus accurately measures the frequency domain characteristics of the power device 200.

[0115] like Figure 1 As shown, in some embodiments, optionally, the probe assembly 150 further includes: a cable 162 , one end of the cable 162 is connected to the probe 152 , and the other end of the cable 162 is connected to the data analyzer 170 .

[0116] In this embodiment, probe assembly 150 further includes a cable 162, which is a data transmission component. One end of cable 162 is connected to probe 152, and the other end of cable 162 is connected to data analyzer 170. Cable 162 is used to transmit electrical signals acquired by probe 152 to data analyzer 170 and also assists data analyzer 170 in generating sweep frequency signals.

[0117] Specifically, the cable 162 is composed of multiple thin conductors that are wrapped in an insulating material to provide electrical isolation and protection.

[0118] like Figure 1 and Figure 11 As shown, in some embodiments, optionally, the probe assembly 150 further includes: a bracket 164 disposed on the connecting arm 154 , a support portion 166 is disposed on the bracket 164 , and the support portion 166 abuts against the cable 162 to support the cable 162 .

[0119] In this embodiment, the probe assembly 150 of the frequency domain measurement device further includes a bracket 164, which is a fixed structure disposed on the connecting arm 154. The support portion 166 is a portion of the bracket 164 and is arc-shaped or groove-shaped to match the shape of the cable 162.

[0120] The primary function of support portion 166 is to support cable 162 and prevent it from sagging, twisting, or fraying during measurement. Placing cable 162 on support portion 166 ensures that it maintains a stable shape and position during signal transmission, thereby improving measurement accuracy and reliability.

[0121] Specifically, on one hand, one end of the cable 162 passes through the first fixture 156 and is connected to the probe 152 .

[0122] Specifically, on the other hand, the first clamp 156 includes a shell 158 , which is provided with an opening and a connector 160 , one end of the cable 162 is electrically connected to one end of the connector 160 , and the probe 152 is passed through the opening and electrically connected to the other end of the connector 160 .

[0123] Specifically, there are two cables 162 and two connectors 160 , and one cable 162 is connected to one connector 160 .

[0124] like Figure 1 and Figure 2 As shown, in some embodiments, optionally, the frequency domain measurement device further includes: a control component 180, which is electrically connected to the pressure sensor 128 and the drive component 130 respectively, and is used to control the operation of the drive component 130 according to the detection result of the pressure sensor 128.

[0125] In this embodiment, specifically, the frequency domain measurement device also includes a control component 180, which is electrically connected to the drive component 130 and the pressure sensor 128. The control component 180 can control the operation of the drive component 130 according to the pressure detection value of the pressure sensor 128, thereby realizing automated measurement of the frequency domain measurement device.

[0126] Specifically, the control component 180 controls the pressure sensor 128 to perform pressure detection. When the pressure detection value is less than the preset pressure value, the control drive component 130 is controlled to move toward the direction close to the pressure feedback platform 120. During the movement, the probe 152 will gradually approach the terminal 202 of the power device 200. The pressure detection value is obtained throughout the movement. When the pressure detection value reaches the preset pressure value, it indicates that the probe 152 is in close contact with the terminal 202 of the power device 200. At this time, the control drive component 130 stops driving.

[0127] Specifically, the control component 180 includes a touch screen display, which can perform corresponding operations when touched by the user, so that the user can perform manual operations.

[0128] The touch screen can also display control parameters to keep users informed of the control process.

[0129] Specifically, the control parameters include parameters such as pressure detection value, preset pressure value and motor step value.

[0130] like Figure 1 、 Figure 2 、 Figure 6 and Figure 7 As shown, in some embodiments, optionally, the support platform 122 includes: a support surface 124; a second clamp 126, which is arranged on the support surface 124, and the second clamp 126 is used to clamp the power device 200; the pressure sensor 128 is arranged in the support platform 122, and at least part of the pressure sensor 128 is passed through the support surface 124 and connected to the second clamp 126.

[0131] In this embodiment, the support platform 122 is further defined. The support surface 124 is the primary portion of the support platform 122, directly supporting and carrying the power device 200. Specifically, the support surface 124 is flat, ensuring that the power device 200 can be stably placed thereon while facilitating subsequent testing or operation. A pressure sensor 128 is disposed on one side of the support surface 124.

[0132] The second fixture 126 is disposed on the bearing surface 124, opposite the pressure sensor 128. The primary function of the second fixture 126 is to clamp the power device 200, ensuring it is stably fixed to the support platform 122 for subsequent testing or operation. By clamping the power device 200, the second fixture 126 can prevent it from moving or shifting during testing, thereby improving the accuracy and stability of the test. At least a portion of the pressure sensor 128 is disposed through the bearing surface 124 and connected to the second fixture 126. This allows for accurate detection of the force applied by the power device 200.

[0133] like Figure 1 and Figure 2As shown, in some embodiments, optionally, the frequency domain measurement device further includes: a fixing frame 190 , which is disposed on the base 110 ; and a fixing member 192 , which passes through the fixing frame 190 and has one end abutting against the pressure feedback platform 120 .

[0134] In this embodiment, the frequency domain measurement device further includes a fixing component, specifically, the frequency domain measurement device further includes a fixing frame 190 and a fixing member 192. The fixing frame 190 is disposed on the base 110. The fixing member 192 is disposed in the fixing frame 190.

[0135] One end of the fixing member 192 abuts against the pressure feedback platform 120 , and the pressure feedback platform 120 is firmly fixed on the fixing frame 190 by applying a certain pressure or clamping force.

[0136] The fixing function of the fixing member 192 can prevent the pressure feedback platform 120 from moving or deflecting during the measurement process, thereby ensuring the continuity and accuracy of the measurement.

[0137] The combination of the mounting bracket 190 and the fixture 192 plays a key role in supporting and securing the frequency domain measurement device. Together, they ensure that key components such as the power device 200 under test and the pressure feedback platform 120 maintain stable positions and states during the measurement process.

[0138] Specifically, the frequency domain measurement device further includes a fixed adjustment portion, which is located at one end of the fixing member 192 away from the pressure feedback platform 120 . By rotating the fixed adjustment portion, the fixing force of the fixing member 192 can be adjusted.

[0139] Specifically, the fixing frame 190 includes a first frame and a second frame, and the first frame and the second frame are respectively located on different sides of the pressure feedback platform 120. There are six fixing parts 192, three fixing parts 192 pass through the first frame and abut against the pressure feedback platform 120, and the other three fixing parts 192 pass through the second frame and abut against the pressure feedback platform 120 to achieve corresponding fixation.

[0140] Specifically, the first frame includes a first plate and a second plate. The first plate extends along the height direction of the pressure feedback platform 120, and the second plate extends along the width direction of the pressure feedback platform 120. The second plate is connected to the first plate and is located above at least part of the pressure feedback platform 120. Two of the three fixing members 192 are passed through the second plate, and one is passed through the first plate to achieve upper and left side fixation.

[0141] Specifically, the second frame includes a third plate and a fourth plate. The third plate extends along the height direction of the pressure feedback platform 120, and the fourth plate extends along the width direction of the pressure feedback platform 120. The fourth plate is connected to the third plate and is located above at least part of the pressure feedback platform 120. Two of the three fixing members 192 are passed through the fourth plate, and one is passed through the third plate to achieve upper and right side fixation.

[0142] like Figure 1 and Figure 2 As shown, in some embodiments, optionally, the frequency domain measurement device further includes: a plurality of legs 194 , and the plurality of legs 194 are spaced apart and arranged on a side of the base 110 away from the pressure feedback platform 120 .

[0143] In this embodiment, the frequency domain measurement device also includes a plurality of legs 194, which are spaced apart on the side of the base 110 facing away from the pressure feedback platform 120, providing stable support for the entire measurement device. The design of legs 194 allows the device to be placed stably on a work surface, preventing it from tilting or collapsing due to an unstable center of gravity.

[0144] Specifically, there are four legs 194, located at the four corners of the base 110 facing away from the pressure feedback platform 120. The number and layout of legs 194 are carefully designed to ensure the stability of the device during measurement. By properly distributing the position and number of legs 194, shaking of the device due to vibration or external interference during measurement can be minimized.

[0145] Specifically, the support legs 194 have an adjustment function, such as height adjustment or tilt angle adjustment, which enables the device to adapt to different working environments and measurement requirements, thereby improving the flexibility and applicability of the frequency domain measurement device.

[0146] Specifically, the support legs 194 and the base 110 are connected by bolts or welding, which ensures a firm connection between the support legs 194 and the base 110 and avoids equipment instability caused by loose connection.

[0147] Specifically, the support leg 194 includes a connecting column and a rubber pad. One end of the connecting column is connected to the side of the base 110 away from the pressure feedback platform 120, and the other end of the connecting column is connected to the rubber pad. The rubber pad is used to contact the work surface to achieve stable support.

[0148] Specifically, the cross-sectional diameter of the rubber pad is larger than the cross-sectional diameter of the connecting column.

[0149] In some embodiments of the present invention, the frequency domain parameters of the power device 200 are optionally measured using a frequency domain measurement device. First, the power device 200 is fixed to the pressure feedback platform 120 via the second fixture 126. The motor 132 is then controlled to reset. Based on the absence of pressure feedback from the pressure sensor 128, the motor 132 rotates according to a preset stepping motion, and the roller screw 134 controls the feed of the probe 152 along the Z axis. When the probe 152 contacts the terminal 202 of the power device 200, the pressure sensor 128 feeds back pressure to the pressure feedback system to adjust the rotation of the motor 132 until the preset pressure value is reached and the motor 132 stops rotating. The frequency domain curve results are then read out on the vector network analyzer.

[0150] In this embodiment, the data analyzer 170 is a vector network analyzer. The present invention designs a frequency domain measurement device with adjustable and controllable pressure. The frequency domain measurement device comprises a vector network analyzer, a cable 162, a probe assembly 150, and a power device 200. The power device 200 is secured to the pressure feedback platform 120 by a second fixture 126. The vector network analyzer, via the cable 162 and a probe 152 on the probe assembly 150, is in full contact with the terminal 202 of the power device 200. The pressure feedback system, integrated with the pressure sensor 128, regulates the rotation of the motor 132 in real time. The roller screw 134 controls the Z-axis feed of the probe 152, thereby adjusting the contact pressure between the probe 152 and the terminal 202 of the power device 200.

[0151] This utility model replaces the traditional welding-type frequency domain reflectometry with a voltage-controlled power device frequency domain reflectometry solution. On the one hand, it greatly reduces the complexity of FDR (Frequency Domain Reflectometry) measurement, saves measurement time, avoids the risk of damage to the traditional welding-type measurement fixture during the welding process, and also avoids the measurement error introduced by the aging of the measurement fixture caused by the welding process; on the other hand, the designed pressure probe system can accurately control the contact pressure and contact angle between the probe and the power device terminal through pressure feedback adjustment, thereby controlling the size of the contact resistance between the two, and ensuring the repeatability of multiple frequency domain reflectometry measurements.

[0152] In this utility model, the term "plurality" refers to two or more, unless otherwise specified. Terms such as "installed," "connected," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean fixed, removable, or integral; "connected" can mean directly or indirectly through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0153] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these 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 any one or more embodiments or examples.

[0154] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A frequency domain measurement device, characterized in that: Used to measure frequency domain parameters of power devices, the frequency domain measurement equipment includes: base; a pressure feedback platform, disposed on the base, comprising a support platform and a pressure sensor, wherein the support platform is used to support the power device, and the pressure sensor is disposed on the support platform and is used to detect the pressure applied by the power device on the support platform; A driving assembly is provided on the base; A probe assembly connected to the drive assembly, wherein the probe assembly includes a probe; a data analyzer connected to the probe assembly; In which, the driving component is used to drive the probe assembly to move relative to the pressure feedback platform so that the probe is connected to or separated from the terminal of the power device. When the probe is connected to the terminal and the pressure detection value detected by the pressure sensor reaches a preset pressure value, the data analyzer detects and obtains the frequency domain parameters of the power device.

2. The frequency domain measurement device according to claim 1, characterized in that The pressure sensor is further configured to display the pressure detection value.

3. The frequency domain measurement device according to claim 1, characterized in that The drive assembly includes: Motor; A roller screw, the roller screw comprising a screw rod and a slider, the screw rod being connected to the motor, and the slider being arranged on the screw rod; A slide is provided on the base, the slide is provided with a guide rail extending along the height direction of the pressure feedback platform, and the slider is slidably connected to the guide rail; The screw rod is arranged in the guide rail, and the probe assembly is connected to the slider; The motor can drive the screw rod to rotate, so that the slider slides on the screw rod and the guide rail.

4. The frequency domain measurement device according to claim 1, characterized in that The probe assembly further comprises: a connecting arm connected to the driving assembly; A first clamp is connected to the connecting arm, and the first clamp clamps the probe.

5. The frequency domain measurement device according to claim 4, characterized in that The probe assembly further comprises: A cable, one end of which is connected to the probe, and the other end of which is connected to the data analyzer.

6. The frequency domain measurement device according to claim 5, characterized in that The probe assembly further comprises: The bracket is arranged on the connecting arm. The bracket is provided with a supporting portion, and the supporting portion abuts against the cable to support the cable.

7. The frequency domain measurement device according to claim 1, characterized in that The object bearing platform includes: bearing surface; A second clamp is provided on the carrying surface, and the second clamp is used to clamp the power device; The pressure sensor is disposed in the object supporting platform, and at least a portion of the pressure sensor is disposed through the supporting surface and connected to the second clamp.

8. The frequency domain measurement device according to any one of claims 1 to 7, characterized in that: The frequency domain measurement device further includes: The control component is electrically connected to the pressure sensor and the driving component respectively, and is used to control the operation of the driving component according to the detection result of the pressure sensor.

9. The frequency domain measurement device according to any one of claims 1 to 7, characterized in that: The frequency domain measurement device further includes: A fixing frame, arranged on the base; A fixing member is provided through the fixing frame, and one end of the fixing member is in contact with the pressure feedback platform.

10. The frequency domain measurement device according to any one of claims 1 to 7, characterized in that: The frequency domain measurement device further includes: A plurality of supporting legs are arranged at intervals on a side of the base facing away from the pressure feedback platform.

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