Frequency domain measurement device and frequency domain measurement method

Abstract

The invention provides frequency domain measurement equipment and a frequency domain measurement method, the frequency domain measurement equipment is used for performing frequency domain parameter measurement on a power device, and the frequency domain measurement equipment comprises a base; 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 invention is simpler in measurement process.

Description

Technical Field

[0001] The present invention relates to the technical field of device measurement, and in particular to a frequency domain measurement device and a frequency domain measurement method. Background Art

[0002] In the related art, when performing frequency domain measurement of power devices, a welding measuring fixture is required to meet the impedance matching between the measuring equipment and the power device, and the power device needs to be re-soldered on the measuring fixture each time a frequency domain measurement is performed. Power devices have a very high power density and are integrated on a copper frame package substrate with excellent heat dissipation, and the drain terminal and the substrate are an integrated structure, which means that the soldering iron temperature must be greater than 350°C to ensure the melting of the solder, which poses a risk of damaging the device.

[0003] After completing the frequency domain measurement, the device needs to be disassembled for a second time, during which the three terminals must be ensured to reach the solder melting temperature synchronously to detach from the measurement fixture, which is very inconvenient and time-consuming. In addition, frequent device disassembly can easily lead to problems such as solder accumulation, cracking, and substrate separation in the measurement fixture, which not only causes damage to the measurement fixture, but also introduces measurement errors. The complexity of using the measurement fixture also makes it impossible to achieve fast frequency domain measurement of power devices. Summary of the invention

[0004] The present invention aims to solve one of the technical problems existing in the prior art or related technology.

[0005] In view of this, the first aspect of 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 to the support platform by the power device located on 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 the present invention aims 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 state and performance of the power devices at different frequencies.

[0007] The frequency domain measurement equipment includes 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, and the base provides a stable foundation to ensure that other components can be stably installed and operated.

[0008] The pressure feedback platform includes a support platform and a pressure sensor. The support platform is located on the base and is used to support the power device to be tested. The pressure sensor is arranged on the support platform. Specifically, the pressure sensor can be embedded inside the support platform or closely connected to the support platform. The pressure sensor is used to detect the pressure applied by the power device to 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 driving assembly is arranged on the base, and is used to drive the probe assembly to move relative to the pressure feedback platform. The driving assembly can realize the precise movement and positioning of the probe assembly. The probe assembly is connected to the driving assembly, and the probe assembly includes a probe.

[0011] The probe is a component used to contact the terminal of the power device, and the probe is made of a conductive material. The data analyzer is connected to the probe assembly, and the data analyzer 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 the power device in real time to obtain the 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 by the present invention drives the probe assembly to move relative to the pressure feedback platform through the driving assembly, so that the probe is in close contact with the terminal of the power device. During the contact process, the pressure sensor detects the contact pressure in real time. When the contact pressure reaches a preset pressure value, it means that the probe is in contact with the terminal of the power device. At this time, data analysis can be performed accurately. Therefore, the data analyzer starts to scan the frequency to detect and obtain the frequency domain parameters of the power device. Specifically, the data analyzer obtains the frequency domain feedback curve of the power device. In addition, the driving assembly stops driving at this time.

[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 the present invention adopts a voltage-controlled frequency domain reflection measurement scheme, replacing the traditional welding frequency domain reflection measurement scheme, which greatly reduces the complexity of measurement, saves measurement time, and avoids the risk of damage and measurement errors that may be caused during the welding process.

[0017] Through pressure feedback regulation, the present invention 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 present invention can extend the service life of the measuring fixture and reduce the 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 measurement 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: In some technical solutions, optionally, the pressure sensor is also used to display the pressure detection value.

[0021] In this technical solution, the frequency domain measurement device proposed in the present invention can provide 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 used to display the 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, so as to accurately adjust 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.

[0022] In some technical schemes, 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.

[0023] 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.

[0024] The roller screw consists of a lead screw and a slider. The lead screw is connected to the motor. When the motor rotates, the lead screw will also rotate. The slider is set on the lead screw and forms a rolling friction contact with the lead screw. When the lead screw rotates, the slider will slide on the lead screw along its axial direction. The slide is provided with a guide rail, which is a linear track extending along the height direction of the pressure feedback platform. The slider is set on the guide rail, thereby providing a stable and low-friction sliding path for the slider.

[0025] The probe assembly is connected to the slider so that when the slider slides on the rail, the probe assembly moves with it.

[0026] During the operation of the drive assembly, when the position of the probe assembly needs to be adjusted, the control motor is started, and after the motor rotates, the lead screw is driven to rotate. As the lead screw rotates, the slider slides along the spiral track of the lead screw. Since the slider is set on the slide rail, the slider will move on the guide rail at the same time. When the slider moves, the probe assembly connected to it will also move accordingly, thereby realizing the adjustment of the position of the probe assembly. Specifically, the probe assembly is adjusted up and down along the height direction of the pressure feedback platform.

[0027] The roller screw provides a smooth and accurate driving force due to its high precision and stable rolling friction characteristics. The probe assembly moves toward the pressure feedback platform at a constant speed and smooth acceleration, ensuring the accuracy and reliability of the measurement.

[0028] The motor is used as a 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.

[0029] Compared with 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.

[0030] In some technical solutions, optionally, the probe assembly further includes: a connecting arm connected to the driving assembly; and a first clamp connected to the connecting arm, the first clamp clamping the probe.

[0031] In this technical solution, the probe assembly also includes a connecting arm and a first clamp. The connecting arm plays a connecting and transmission role. The connecting arm is connected to the driving assembly, and the connecting arm is a bridge between the probe assembly and the driving assembly, and is used to transmit the power and movement of the driving assembly to the probe. Through the connecting arm, the driving assembly can accurately control the moving trajectory and speed of the probe.

[0032] Through the precise control and clamping of the connecting arm and the first fixture, the probe can accurately contact the terminal of the power device and establish a stable electrical connection. At the same time, the data analyzer obtains the frequency domain data of the power device through the probe, processes and analyzes it, thereby achieving accurate measurement of the frequency domain parameters of the power device.

[0033] 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.

[0034] In this technical solution, the probe assembly also includes a cable, which is a data transmission part, one end of the cable is connected to the probe, and the other end of the cable is connected to the data analyzer. The cable is used to transmit the electrical signal obtained by the probe to the data analyzer, and is also used to assist the data analyzer in sending a sweep signal.

[0035] In some technical solutions, optionally, the probe assembly further includes: a bracket, which is arranged on the connecting arm, and a supporting portion is arranged on the bracket, and the supporting portion abuts against the cable to support the cable.

[0036] In the technical solution, the probe assembly of the frequency domain measurement device also includes a bracket, which is a fixed structure arranged on the connecting arm. The support part is a part on the bracket, which is arc-shaped or groove-shaped to match the shape of the cable.

[0037] The main function of the support part is to support the cable and prevent the cable from sagging, twisting or wearing during the measurement process. By placing the cable on the support part, it can ensure that the cable maintains a stable shape and position when transmitting signals, thereby improving the accuracy and reliability of the measurement.

[0038] In some technical solutions, optionally, the frequency domain measurement device also includes: a control component, which 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.

[0039] 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 achieve automated measurement of the frequency domain measurement device.

[0040] The control component controls the pressure sensor to perform pressure detection. When the pressure detection value is less than the preset pressure value, the control driving component is controlled to move toward the direction close to the pressure feedback platform. During the movement, the probe will gradually approach the terminal of the power device. The pressure detection value continues to be obtained during the movement of the probe component. When the pressure detection value reaches the preset pressure value, it indicates that the probe has been tightly abutted against the terminal of the power device. At this time, the control driving component stops driving.

[0041] Specifically, the control component includes a touch display screen, and the touch display screen can perform corresponding operations when being touched by a user, so that the user can perform manual operations.

[0042] The touch screen can also display control parameters to keep users informed of the control process.

[0043] In some technical solutions, optionally, the platform includes: a carrying surface; a second clamp, arranged on the carrying surface, the second clamp is used to clamp the power device; the pressure sensor is arranged in the platform, and at least part of the pressure sensor is passed through the carrying surface and connected to the second clamp.

[0044] In this technical solution, the support platform is further defined, and 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 a plane to ensure that the power device can be stably placed on it and facilitate subsequent testing or operation.

[0045] The second fixture is arranged on the bearing surface, opposite to the pressure sensor. The main function of the second fixture is to clamp the power device and ensure that it is stably fixed on the object platform for subsequent testing or operation. By clamping the power device, the second fixture can prevent it from moving or shifting during the test, thereby improving the accuracy and stability of the test. At least part of the pressure sensor is arranged on the bearing surface and connected to the second fixture. Accurate detection of the force applied by the power device is achieved.

[0046] 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.

[0047] 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 piece. The fixing frame is arranged on the base. The fixing piece is inserted into the fixing frame.

[0048] 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.

[0049] The fixing function of the fixing piece can prevent the pressure feedback platform from moving or deviating during the measurement process, thereby ensuring the continuity and accuracy of the measurement.

[0050] 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.

[0051] In this technical solution, the frequency domain measurement device also includes a plurality of legs, which are arranged at intervals on the side of the base away from the pressure feedback platform, providing stable support for the entire measurement device. The design of the legs enables the device to be placed stably on the work surface, avoiding tilting or collapse due to unstable center of gravity of the device.

[0052] According to the second aspect of the present invention, a frequency domain measurement method is proposed. The frequency domain measurement method includes measuring the frequency domain parameters of a power device through the frequency domain measurement equipment of the first aspect. The frequency domain measurement method includes: obtaining a pressure detection value of a pressure sensor; based on the pressure detection value being less than a preset pressure value, controlling a driving component to drive a probe component to move toward a direction close to a pressure feedback platform, and continuing to obtain the pressure detection value of the pressure sensor during the movement of the probe component; based on the pressure detection value reaching a preset pressure value, controlling the driving component to stop driving; and controlling a data analyzer to detect and obtain the frequency domain parameters of the power device.

[0053] In this technical solution, the frequency domain measurement method proposed by the present invention first obtains the current pressure detection value of the pressure sensor in the initial stage of measurement. If the pressure detection value is less than the preset pressure value, it means that the contact between the probe assembly and the pressure feedback platform is not tight enough, which may affect the accuracy of the measurement. Therefore, the control driving assembly drives the probe assembly to move in the direction close to the pressure feedback platform to increase the contact pressure.

[0054] After the drive assembly moves, the pressure detection value of the pressure sensor is obtained throughout the movement process to confirm whether the contact pressure has reached the preset standard. If the pressure detection value reaches the preset pressure value, it means that the contact between the probe assembly and the pressure feedback platform is tight enough to start measurement. At this time, the control drive assembly stops driving and maintains the current contact state.

[0055] Specifically, the pressure detection value reaches the preset pressure value, that is, the pressure detection value of the pressure sensor is equal to the preset pressure value.

[0056] After confirming that the contact pressure reaches the preset standard, the control data analyzer starts working. The data analyzer uses specific measurement technology and algorithms to perform frequency domain measurements on power devices and generate frequency domain parameters.

[0057] 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.

[0058] The frequency domain measurement method proposed in the present invention adopts a voltage-controlled frequency domain reflection measurement scheme, which replaces the traditional welding frequency domain reflection measurement scheme, greatly reduces the complexity of measurement, saves measurement time, and avoids the risk of damage and measurement errors that may be caused during the welding process.

[0059] Through pressure feedback regulation, the present invention 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.

[0060] Since the welding process is avoided, the present invention can extend the service life of the measuring fixture and reduce the aging and damage of the fixture caused by welding.

[0061] In summary, the frequency domain measurement method proposed in the present invention has fast and accurate measurement capabilities, and can complete the frequency domain parameter measurement of multiple power devices in a short time, which helps to improve production efficiency and product quality.

[0062] In some technical solutions, optionally, before obtaining the pressure detection value of the pressure sensor, the frequency domain measurement method further includes: controlling the driving component to reset.

[0063] In this technical solution, before starting the measurement, the drive assembly is first controlled to reset. The purpose of this step is to restore the probe assembly to its initial position, ensuring that each measurement starts from the same starting point. This helps to eliminate measurement errors caused by different positions of the probe assembly.

[0064] In some technical solutions, optionally, controlling the driving component to drive the probe component to move toward a direction close to the pressure feedback platform specifically includes: controlling the driving component to drive according to a preset step to move the probe component toward a direction close to the pressure feedback platform.

[0065] In this technical solution, before the measurement begins, a suitable step value is set according to the measurement requirements and the initial distance between the probe assembly and the pressure feedback platform. This step value determines the distance the drive assembly moves each time.

[0066] The control driving assembly moves the probe assembly step by step according to a preset step value. By moving the probe assembly step by step, the contact pressure between the probe assembly and the pressure feedback platform can be more accurately controlled, thereby ensuring the accuracy of the measurement.

[0067] Additional aspects and advantages of the present invention will become apparent from the following description or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 One of the structural schematic diagrams of the frequency domain measurement device in an embodiment of the present invention is shown; Figure 2A second structural schematic diagram of a frequency domain measurement device in an embodiment of the present invention is shown; Figure 3 One of the structural schematic diagrams of the driving assembly in an embodiment of the present invention is shown; Figure 4 The second structural schematic diagram of the driving assembly in the embodiment of the present invention is shown; Figure 5 The third structural schematic diagram of the driving assembly in the embodiment of the present invention is shown; Figure 6 A schematic diagram of the structure of a pressure feedback platform in an embodiment of the present invention is shown; Figure 7 A schematic diagram of the structure of a second clamp in an embodiment of the present invention is shown; Figure 8 A schematic structural diagram of a connecting arm of a probe assembly in an embodiment of the present invention is shown; Fig. 9 A schematic structural diagram of a first fixture of a probe assembly in an embodiment of the present invention is shown; Fig.10 A schematic diagram of the structure of a probe assembly in an embodiment of the present invention is shown; Fig.11 A schematic structural diagram of a bracket of a probe assembly in an embodiment of the present invention is shown; Fig.12 A schematic structural diagram of a base in an embodiment of the present invention is shown; Fig.13 A schematic diagram of the structure of a power device in an embodiment of the present invention is shown; Fig.14 One of the flow charts of the frequency domain measurement method in an embodiment of the present invention is shown; Fig.15 The second flowchart of the frequency domain measurement method in the embodiment of the present invention is shown; Fig.16 The third flowchart of the frequency domain measurement method in the embodiment of the present invention is shown.

[0069] in, Figures 1 to 13 The corresponding relationship between the reference numerals and the components is as follows: 110 base, 120 pressure feedback platform, 122 object support table, 124 bearing surface, 126 second fixture, 128 pressure sensor, 130 drive assembly, 132 motor, 134 roller screw, 136 screw, 138 slider, 140 slide table, 142 guide rail, 144 coupling, 150 probe assembly, 152 probe, 154 connecting arm, 156 first fixture, 158 shell, 160 joint, 162 cable, 164 bracket, 166 support part, 170 data analyzer, 180 control assembly, 190 fixing frame, 192 fixing part, 194 support foot, 200 power device, 202 terminal. DETAILED DESCRIPTION

[0070] In order to more clearly understand the above-mentioned purpose, 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 in the embodiments 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 protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0072] Refer to the following Figures 1 to 16 A frequency domain measurement device and a frequency domain measurement method provided according to some embodiments of the present invention are described.

[0073] like Figure 1 and Figure 2 As 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, and 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 platform 122 and a pressure sensor 128, the support platform 122 is used to support the power device 200, and the pressure sensor 128 is arranged on the support platform 122, and is used to detect the pressure applied by the power device 200 located on the support platform 122 to the support platform 122; a driving component 130, which is arranged on A base 110; a probe assembly 150, connected to a drive assembly 130, wherein the probe assembly 150 includes a probe 152; and a data analyzer 170, 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 aims to realize accurate and efficient frequency domain measurement of the power device 200, so as to obtain frequency domain parameters, and then obtain the electrical characteristic parameters of the power device 200 in the frequency domain, reflecting the working state and performance of the power device 200 at different frequencies.

[0075] like Figure 6 and Fig.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 a supporting structure of the entire measurement device, and the base 110 provides a stable foundation to ensure that other components can be stably installed and operated.

[0076] The pressure feedback platform 120 includes a support platform 122 and a pressure sensor 128. The support platform 122 is located on the base 110 and is used to support the power device 200 to be tested. The pressure sensor 128 is arranged on the support platform 122. Specifically, the pressure sensor 128 can be embedded in the support platform 122 or closely connected to the support platform 122 to detect the pressure applied by the power device 200 to the support platform 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 driving 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 driving assembly 130 can achieve precise movement and positioning of the probe assembly 150. The probe assembly 150 is connected to the driving assembly 130 and includes a probe 152.

[0079] like Fig.10 and Fig.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 sweep frequency signal, specifically, to send a continuous sweep frequency 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 drives the probe assembly 150 to move relative to the pressure feedback platform 120 through the driving assembly 130, so that the probe 152 is in 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 means that the probe 152 is in contact with the terminal 202 of the power device 200. At this time, data analysis can be accurately performed, so the data analyzer 170 starts frequency scanning to detect and obtain the frequency domain parameters of the power device 200. In addition, the driving 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 the present invention adopts a voltage-controlled frequency domain reflection measurement scheme, replacing the traditional welding frequency domain reflection measurement scheme, which greatly reduces the complexity of measurement, saves measurement time, and avoids the risk of damage and measurement errors 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 present invention can extend the service life of the measuring fixture and reduce the 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, which can display 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 can provide 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 the pressure detection value in real time. This function provides the user with the convenience of manual adjustment, so that the user can intuitively observe the value displayed in the pressure sensor 128 area, and control the movement of the drive component 130 accordingly, so as to accurately adjust 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] Exemplarily, 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 assembly 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, and the probe 152 is in contact with the terminal 202 of the power device 200, so 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, and the display module can display the pressure detection value.

[0094] Specifically, the pressure sensor 128 also 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 5As 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 driving 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 driving assembly 130 and is used to provide power output.

[0098] The roller screw 134 is composed 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 arranged 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, which is arranged 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, and after the motor 132 rotates, the screw rod 136 is driven to rotate. As the screw rod 136 rotates, the slider 138 slides along the spiral track 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 a smooth acceleration, thereby ensuring the accuracy and reliability of the measurement.

[0102] The motor 132 is used as a power source, and its rotation speed and direction can be precisely adjusted by a controller, so that the user can 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 with 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 have a high cost-effectiveness 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 respectively connects the output shaft and the screw rod 136 to achieve power transmission.

[0107] like Figure 1 , Figure 2 , Figure 8 , Fig. 9 and Fig.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, the probe assembly 150 further includes a connecting arm 154 and a first clamp 156. The connecting arm 154 plays a connecting and transmission role. The connecting arm 154 is connected to the drive assembly 130, and the connecting arm 154 is a bridge between the probe assembly 150 and the drive assembly 130, and is used to transmit the power and movement of the drive assembly 130 to the probe 152. Through the connecting arm 154, the drive assembly 130 can accurately control the moving trajectory and speed of the probe 152.

[0109] Specifically, the connecting arm 154 is detachably connected to the driving assembly 130 , thereby facilitating installation and separation of 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, for example, a spring clamp, a threaded clamp, etc., to ensure that the probe 152 can be firmly clamped.

[0114] Through the 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. At the same time, the data analyzer 170 obtains the frequency domain data of the power device 200 through the probe 152, and processes and analyzes it, thereby achieving accurate measurement of 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, the probe assembly 150 further includes a cable 162, which is a data transmission part, 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. The cable 162 is used to transmit the electrical signal obtained by the probe 152 to the data analyzer 170, and is also used to assist the data analyzer 170 in sending a sweep signal.

[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 Fig.11 As shown, in some embodiments, optionally, the probe assembly 150 further includes: a bracket 164 disposed on the connecting arm 154 , and a supporting portion 166 is disposed on the bracket 164 , and the supporting 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 supporting portion 166 is a portion on the bracket 164, which is arc-shaped or groove-shaped to match the shape of the cable 162.

[0120] The main function of the support portion 166 is to support the cable 162 to prevent the cable 162 from sagging, twisting or wearing during the measurement process. By placing the cable 162 on the support portion 166, it is ensured that the cable 162 maintains a stable shape and position when transmitting signals, thereby improving the accuracy and reliability of the measurement.

[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 fixture 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 there are 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 also 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 means 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 display screen, which can perform corresponding operations when touched by a 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 disposed on the support surface 124, and the second clamp 126 is used to clamp the power device 200; the pressure sensor 128 is disposed in the support platform 122, and at least a portion of the pressure sensor 128 is penetrated through the support surface 124 and connected to the second clamp 126.

[0131] In this embodiment, the support platform 122 is further defined, and the support surface 124 is the main part of the support platform 122, which is used to directly support and support the power device 200. Specifically, the support surface 124 is a plane to ensure that the power device 200 can be stably placed on it, and to facilitate subsequent testing or operation. The pressure sensor 128 is arranged on one side of the support surface 124.

[0132] The second fixture 126 is disposed on the bearing surface 124, opposite to the pressure sensor 128. The main function of the second fixture 126 is to clamp the power device 200 and ensure that it is stably fixed on the support table 122 for subsequent testing or operation. By clamping the power device 200, the second fixture 126 can prevent it from moving or shifting during the test, thereby improving the accuracy and stability of the test. At least part of the pressure sensor 128 is disposed on the bearing surface 124 and connected to the second fixture 126. Accurate detection of the force applied by the power device 200 is achieved.

[0133] like Figure 1 and Figure 2 As shown, in some embodiments, optionally, the frequency domain measurement device further includes: a fixing frame 190 disposed on the base 110 ; a fixing member 192 , the fixing member 192 is passed through the fixing frame 190 , and one end of the fixing member 192 is abutted 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 inserted into 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 deviating during the measurement process, thereby ensuring the continuity and accuracy of the measurement.

[0137] The combination design of the fixing frame 190 and the fixing member 192 plays a key supporting and fixing role in 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 can maintain a stable position and state 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 fixed 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. The number of the fixing members 192 is six, three fixing members 192 pass through the first frame and abut against the pressure feedback platform 120, and the other three fixing members 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 body and a second plate body, the first plate body extends along the height direction of the pressure feedback platform 120, the second plate body extends along the width direction of the pressure feedback platform 120, and the second plate body is connected to the first plate body and is located above at least part of the pressure feedback platform 120. Two of the three fixing members 192 are penetrated through the second plate body, and one is penetrated through the first plate body 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 supporting feet 194 , and the plurality of supporting feet 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 further includes a plurality of legs 194, which are spaced apart on the side of the base 110 away from the pressure feedback platform 120, providing a stable support for the entire measurement device. The design of the legs 194 enables the device to be stably placed on a work surface, avoiding tilting or collapse due to an unstable center of gravity of the device.

[0144] Specifically, there are four legs 194, which are arranged at the four corners of the side of the base 110 away from the pressure feedback platform 120. The number and layout of the legs 194 are carefully designed to ensure the stability of the device during the measurement process. By reasonably distributing the positions and numbers of the legs 194, the shaking of the device caused by vibration or external force interference during the measurement process can be minimized.

[0145] Specifically, the support leg 194 has 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 leg 194 and the base 110 are connected by bolts or welding, which ensures a firm connection between the support leg 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, which is used to contact the work surface to achieve stable support.

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

[0149] like Fig.14 As shown, in some embodiments of the present invention, a frequency domain measurement method is proposed, and the frequency domain measurement method includes: S302: Obtaining a pressure detection value of a pressure sensor; S304: Based on the pressure detection value being less than the preset pressure value, controlling the driving assembly to drive the probe assembly to move toward the direction close to the pressure feedback platform, and continuing to obtain the pressure detection value of the pressure sensor during the movement of the probe assembly; S306: Based on the pressure detection value reaching a preset pressure value, controlling the driving component to stop driving; S308: Control the data analyzer to detect and obtain frequency domain parameters of the power device.

[0150] In this embodiment, at the initial stage of measurement, the current pressure detection value of the pressure sensor is first obtained. If the pressure detection value is less than the preset pressure value, it means that the contact between the probe assembly and the pressure feedback platform is not tight enough, which may affect the accuracy of the measurement. Therefore, the control driving assembly drives the probe assembly to move in the direction close to the pressure feedback platform to increase the contact pressure.

[0151] After the drive assembly moves, the pressure sensor's pressure detection value is obtained throughout the movement of the probe assembly to confirm whether the contact pressure has reached the preset standard. If the pressure detection value reaches the preset pressure value, it means that the contact between the probe assembly and the pressure feedback platform is tight enough to start measurement. At this time, the drive assembly is controlled to stop driving and maintain the current contact state.

[0152] After confirming that the contact pressure reaches the preset standard, the control data analyzer starts working. The data analyzer uses specific measurement technology and algorithms to perform frequency domain measurements on power devices and generate frequency domain parameters.

[0153] 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.

[0154] The frequency domain measurement method proposed in the present invention adopts a voltage-controlled frequency domain reflection measurement scheme, which replaces the traditional welding frequency domain reflection measurement scheme, greatly reduces the complexity of measurement, saves measurement time, and avoids the risk of damage and measurement errors that may be caused during the welding process.

[0155] Through pressure feedback regulation, the present invention 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.

[0156] Since the welding process is avoided, the present invention can extend the service life of the measuring fixture and reduce the aging and damage of the fixture caused by welding.

[0157] 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 in a short time, which helps to improve production efficiency and product quality.

[0158] Specifically, during the movement of the probe assembly, when the pressure detection value of the pressure sensor continues to be obtained, based on the pressure detection value being less than the preset pressure value, the driving assembly is controlled to continue driving; like Fig.15 As shown, in some embodiments of the present invention, a frequency domain measurement method is proposed, and the frequency domain measurement method includes: S402: Control the drive component to reset; S404: Obtaining a pressure detection value of a pressure sensor; S406: Based on the pressure detection value being less than the preset pressure value, controlling the driving assembly to drive the probe assembly to move toward the direction close to the pressure feedback platform, and continuing to obtain the pressure detection value of the pressure sensor during the movement of the probe assembly; S408: Based on the pressure detection value reaching a preset pressure value, controlling the driving component to stop driving; S410: Control the data analyzer to detect and obtain frequency domain parameters of the power device.

[0159] In this embodiment, before starting the measurement, the driving assembly is first controlled to reset. The purpose of this step is to restore the probe assembly to the initial position, ensuring that each measurement starts from the same starting point. This helps to eliminate measurement errors caused by different positions of the probe assembly.

[0160] In some embodiments, optionally, controlling the driving assembly to drive the probe assembly to move toward a direction close to the pressure feedback platform specifically includes: controlling the driving assembly to drive according to a preset stepping step to move the probe assembly toward a direction close to the pressure feedback platform.

[0161] In this embodiment, before the measurement begins, a suitable step value is set according to the measurement requirements and the initial distance between the probe assembly and the pressure feedback platform, and the step value determines the distance that the driving assembly moves each time.

[0162] The control driving assembly moves the probe assembly step by step according to a preset step value. By moving the probe assembly step by step, the contact pressure between the probe assembly and the pressure feedback platform can be more accurately controlled, thereby ensuring the accuracy of the measurement.

[0163] like Fig.16 As shown, in some embodiments, in some embodiments of the present invention, a frequency domain measurement method is proposed, and the frequency domain measurement method includes: S502: The power device is fixed on the pressure feedback platform by a second fixture; S504: Control the motor to reset; S506: Based on the pressure sensor without pressure feedback, the motor rotates according to the preset step, and the roller screw structure controls the feeding of the frequency domain probe on the Z axis; S508: When the probe contacts the power device terminal, the pressure sensor feeds back pressure to the pressure feedback system to adjust the rotation of the motor until the preset pressure value is reached and the motor stops. S510: Read out the frequency domain curve results displayed on the vector network analyzer.

[0164] In this embodiment, the data analyzer is a vector network analyzer.

[0165] The present invention designs a frequency domain measurement method and device with adjustable and controllable pressure. The frequency domain measurement device is composed of a vector network analyzer, a cable, a probe assembly and a power device, wherein the power device is fixed on a pressure feedback platform by a second fixture, the vector network analyzer is in full contact with the power device terminal through the cable and the probe on the probe assembly, the rotation of the motor is adjusted in real time through the pressure feedback system of the integrated pressure sensor, and the feed of the probe on the Z axis is controlled by the roller screw structure to achieve the contact pressure adjustment between the probe and the power device terminal.

[0166] Specifically, for the test process, the power device is first fixed on the pressure feedback platform by the second fixture, and the control component controls the motor to reset. When there is no pressure feedback from the pressure sensor, the motor rotates according to the preset step, and the roller screw structure controls the feed of the frequency domain probe on the Z axis. When the probe contacts the power device terminal, the pressure sensor feeds back the real-time pressure to the control component (specifically the pressure feedback system in the control component) to adjust the rotation of the motor until it reaches the preset pressure value and stops, and then reads the frequency domain curve results displayed on the data analyzer.

[0167] The present invention replaces the traditional welding frequency domain reflection measurement with a voltage-controlled power device frequency domain reflection measurement scheme. On the one hand, the complexity of FDR (Frequency Domain Reflectometry) measurement is greatly reduced, the measurement time is saved, the risk of damage to the traditional welding measurement fixture during the welding process is avoided, and the measurement error introduced by the aging of the measurement fixture caused by the welding process is avoided; on the other hand, the designed pressure probe system can accurately control the contact pressure and contact angle between the frequency domain 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 accuracy of multiple frequency domain reflection measurements.

[0168] In the present invention, the term "plurality" refers to two or more than two, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0169] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0170] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A frequency domain measurement device, characterized in that: Used to measure frequency domain parameters of a power device, the frequency domain measurement device comprises: Base; A pressure feedback platform is arranged on the base, the pressure feedback platform comprises a support platform and a pressure sensor, the support platform is used to carry the power device, and the pressure sensor is arranged on the support platform and is used to detect the pressure applied by the power device on the support platform to the support platform; A driving assembly, disposed on the base; A probe assembly connected to the driving assembly, wherein the probe assembly includes a probe; a data analyzer connected to the probe assembly; Among them, the driving component is used to drive the probe component 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 also used to display the pressure detection value.

3. The frequency domain measurement device according to claim 1, characterized in that: The drive assembly comprises: Motor; A roller screw, the roller screw comprising a screw and a slider, the screw is connected to the motor, and the slider is arranged on the screw; A slide table is arranged on the base, the slide table 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 lead screw to rotate so that the slider slides on the lead screw and the guide rail.

4. The frequency domain measurement device according to claim 1, characterized in that: The probe assembly also includes: 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 also includes: 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 also includes: The bracket is arranged on the connecting arm, and a supporting portion is arranged on the bracket, 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 support platform comprises: bearing surface; A second clamp, disposed on the carrying surface, the second clamp being used to clamp the power device; The pressure sensor is disposed in the object-carrying platform, and at least a portion of the pressure sensor is disposed through the carrying surface and connected to the second clamp.

8. A frequency domain measurement method, characterized in that: Used to measure frequency domain parameters of a power device by using the frequency domain measurement device according to any one of claims 1 to 7, the frequency domain measurement method comprising: Obtaining a pressure detection value of the pressure sensor; Based on the pressure detection value being less than a preset pressure value, controlling the driving assembly to drive the probe assembly to move toward the direction close to the pressure feedback platform, and continuing to obtain the pressure detection value of the pressure sensor during the movement of the probe assembly; Based on the pressure detection value reaching a preset pressure value, controlling the driving component to stop driving; The data analyzer is controlled to detect and obtain the frequency domain parameters of the power device.

9. The frequency domain measurement method according to claim 8, characterized in that: Before obtaining the pressure detection value of the pressure sensor, the frequency domain measurement method further includes: Control the driving component to reset.

10. The frequency domain measurement method according to claim 8, characterized in that: Controlling the driving assembly to drive the probe assembly to move toward the direction close to the pressure feedback platform specifically includes: The driving assembly is controlled to drive according to a preset stepping step, so that the probe assembly moves toward a direction close to the pressure feedback platform.

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