Multi-channel load test tool for radio frequency medical equipment
The multi-channel load test fixture for radio frequency medical devices solves the problem of not being able to directly test the radio frequency output during equipment development, enabling flexible adaptation to different devices and power levels, and reducing development costs and time.
Patent Information
- Application Number
- CN202520202406.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-08
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-02-08
AI Technical Summary
Existing radiofrequency medical devices cannot be directly tested in the patient's body during the research and development process, and the load connection form is unique for different devices and power requirements, resulting in high research and development costs and difficulties in material control.
Design a multi-channel load test fixture for radio frequency medical devices. It uses a wiring board, terminals, impedance adjustment knob, and resistive load. Through multi-channel design and impedance adjustment knob, it can adjust the resistive load with different resistance values to adapt to different devices and power requirements.
It reduces R&D costs and testing time, improves the efficiency of equipment stability assessment, and adapts to the testing needs of various radiofrequency medical devices.
Smart Images
Figure CN223857258U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of radio frequency medical testing equipment technology, specifically to a multi-channel load testing fixture for radio frequency medical equipment. Background Technology
[0002] Radiofrequency medical devices typically consist of a radiofrequency generator, a temperature measurement device, treatment electrodes, cables, and a neutral electrode (if applicable). Radiofrequency energy (usually in the form of an electric current) is applied to the skin and subcutaneous tissue through the treatment electrodes. During the development of radiofrequency medical devices, it is not possible to directly test the device's radiofrequency output on a patient or evaluate its stability; therefore, a high-power resistor is used as a load for testing.
[0003] Because the output power of radio frequency (RF) devices is not a single value, different loads are required for different output power levels. Even for the same power output, the industry tests loads with different resistance values to ensure device stability. Furthermore, different medical devices output RF power in different ways, corresponding to different interfaces. Therefore, the connection method between the load and the device is unique; that is, different devices and loads with different resistance values require a specific set of equipment. Moreover, the use of these loads is concentrated in the device development phase and is not reused after development is complete, leading to high development costs and difficulties in material control. Utility Model Content
[0004] The purpose of this utility model is to provide a multi-channel load testing fixture for radio frequency medical devices in order to solve the above problems.
[0005] To achieve the above objectives, this utility model specifically adopts the following technical solution, including:
[0006] A junction box, wherein a terminal block is provided in the middle of the junction box, and multiple sets of impedance adjustment knobs and resistive loads are provided on both sides of the terminal block;
[0007] The wiring terminals, the impedance adjustment knob, and the resistive load are electrically connected to form a multi-channel test path.
[0008] As a further description of the above technical solution, the terminal block has a wiring hole through which a wire passes.
[0009] As a further description of the above technical solution, the bottom of the terminal block is symmetrically provided with support columns, which are used to support the terminal block.
[0010] As a further description of the above technical solution, the wiring terminal includes a first terminal and a second terminal, the first terminal and the second terminal being fixed facing each other.
[0011] As a further description of the above technical solution, the first terminal is electrically connected to the impedance adjustment knob and the positive terminal of the resistive load, and the impedance of the first terminal is adjusted by the impedance adjustment knob.
[0012] As a further description of the above technical solution, the second terminal is electrically connected to the negative terminal of the resistive load, and the second terminal is used for testing.
[0013] As a further description of the above technical solution, a terminal block is provided at the bottom of the impedance adjustment knob, and the terminal block is provided with wiring contacts.
[0014] As a further description of the above technical solution, the wiring contact includes a first contact and a second contact, with the second contact arranged around the first contact.
[0015] As a further description of the above technical solution, multiple sets of resistive loads are symmetrically arranged, and the resistive loads are electrically connected through wires and second contacts.
[0016] As a further description of the above technical solution, the resistive load includes a plurality of resistors with different resistance values arranged in parallel, the resistance values of which are 50-1000Ω.
[0017] The beneficial effects of this utility model are as follows:
[0018] This invention employs a multi-channel design, connecting a resistive load and the medical radio frequency device under test via terminal blocks. The resistance value of each channel load can be adjusted via an impedance adjustment knob, allowing for the testing of different numbers of medical radio frequency devices as needed, effectively reducing R&D costs and testing time. Attached Figure Description
[0019] Figure 1 This is a top view of the multi-channel load testing fixture for radio frequency medical devices of this utility model;
[0020] Figure 2 This is a bottom view of the multi-channel load test fixture for radio frequency medical devices of this utility model;
[0021] Figure label:
[0022] 1. Terminal block; 11. Wiring hole; 12. Support column; 2. Terminal block; 21. First terminal; 22. Second terminal; 3. Impedance adjustment knob; 31. Terminal block; 32. Wiring contact; 321. First contact; 322. Second contact; 4. Resistive load; 41. Resistor; 5. Wire. Detailed Implementation
[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.
[0024] like Figures 1-2 As shown, in one embodiment, a multi-channel load test fixture for radio frequency medical devices includes: a terminal block 1, a terminal block 2, an impedance adjustment knob 3, and a resistive load 4, which are electrically connected to form a multi-channel test path.
[0025] The terminal block 2 is located in the middle of the terminal block 1 and is used to connect the device under test and the resistive load 4. Multiple impedance adjustment knobs 3 and the resistive load 4 are located on both sides of the terminal block 2. The resistance value is adjusted by adjusting the impedance adjustment knobs 3.
[0026] like Figures 1-2 As shown, in this embodiment, the bottom of the terminal block 1 is symmetrically provided with support columns 12 for supporting the terminal block 1; the terminal block 1 has a wiring hole 11, through which a wire 5 is passed to form a multi-channel test circuit.
[0027] For example, the wire 5 can be made of high-specification pure copper wire, so that the terminal block 1, the terminal block 2, the impedance adjustment knob 3 and the resistive load 4 can be connected by welding the wire 5 to the corresponding contacts to form a multi-channel test path.
[0028] like Figures 1-2 As shown, in this embodiment, the terminal block 2 includes a first terminal 21 and a second terminal 22, and the first terminal 21 and the second terminal 22 are fixed facing each other. Copper wires are used to connect the medical radio frequency device under test as needed according to the number of channels used.
[0029] For example, the first terminal 21 is electrically connected to the impedance adjustment knob 3 and the positive terminal of the resistive load 4, and the impedance is adjusted by the impedance adjustment knob 3; while the second terminal 22 is electrically connected to the negative terminal of the resistive load 4 for testing.
[0030] Specifically, terminal 2 can be a screw-fixed terminal with a nominal operating current of 8A and a rated voltage of 130V, ensuring that the power can meet the needs of various RF output devices, and only requires tightening the screw to achieve fixation. For different connection interfaces, it can be convenient to connect and simultaneously match devices under test with different numbers of RF channels.
[0031] like Figures 1-2 As shown, in this embodiment, a junction box 31 is provided at the bottom of the impedance adjustment knob 3, and the junction box 31 is provided with wiring contacts 32 for connecting the second terminal 2 and the resistive load 4. Different resistance values can be switched by rotating the impedance adjustment knob 3.
[0032] Specifically, the wiring contact 32 includes a first contact 321 and a second contact 322. The impedance adjustment knob 3 is electrically connected to the first terminal 21 through the first contact 321. The second contact 322 is arranged around the first contact 321. The impedance adjustment knob 3 is electrically connected to the resistive load 4 through the second contact 322.
[0033] like Figures 1-2 As shown, in this embodiment, multiple sets of resistive loads 4 are symmetrically arranged, and the resistive loads 4 are electrically connected through wires 5 and second contact 322.
[0034] Specifically, the resistive load 4 includes multiple resistors 41 with different resistance values arranged in parallel. The resistance value of the resistors 41 is 50-1000Ω. The resistance value can be gradually increased or decreased by rotating the impedance adjustment knob 3.
[0035] Through the above technical solution, this application adopts a multi-channel design, connecting the resistive load 4 and the medical radio frequency device under test through the terminal 2. The resistance value of each channel load can be adjusted by the impedance adjustment knob 3, which can test different numbers of medical radio frequency devices as needed, effectively reducing R&D costs and testing time.
[0036] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A multi-channel load test fixture for radio frequency medical devices, characterized by, Include: The terminal block (1) is provided with terminal (2) in the middle, and a plurality of sets of impedance adjustment knob (3) and resistance load (4) are arranged on both sides of the terminal (2); The terminal (2), the impedance adjustment knob (3) and the resistance load (4) are electrically connected to form a multi-channel test path.
2. The RF medical device multi-channel load test fixture of claim 1, wherein, The terminal block (1) is provided with a wiring hole (11), and the wiring hole (11) is provided with a wire (5).
3. The RF medical device multi-channel load test fixture of claim 2, wherein, The terminal block (1) is provided with a support column (12) at the bottom, which is used to support the terminal block (1).
4. The RF medical device multi-channel load test fixture of claim 1, wherein, The terminal (2) includes a first terminal (21) and a second terminal (22), and the first terminal (21) and the second terminal (22) are fixed opposite to each other.
5. The RF medical device multi-channel load test fixture of claim 4, wherein, The first terminal (21) is electrically connected with the impedance adjustment knob (3) and the positive electrode of the resistance load (4), and the impedance of the first terminal (21) is adjusted by the impedance adjustment knob (3).
6. The RF medical device multi-channel load test fixture of claim 4, wherein, The second terminal (22) and the negative electrode of the resistance load (4) are electrically connected, and the second terminal (22) is used for testing.
7. The RF medical device multi-channel load test fixture of claim 1, wherein, The impedance adjustment knob (3) is provided with a terminal disc (31) at the bottom, and the terminal disc (31) is provided with a terminal contact (32).
8. The RF medical device multi-channel load test fixture of claim 7, wherein, The terminal contact (32) includes a first contact (321) and a second contact (322), and the second contact (322) is arranged around the first contact (321).
9. The RF medical device multi-channel load test fixture of claim 1, wherein, The resistance load (4) is symmetrically provided with a plurality of sets, and the resistance load (4) is electrically connected with the wire (5) and the second contact (322).
10. The RF medical device multi-channel load test fixture of claim 9, wherein, The resistance load (4) includes a plurality of different resistance values of resistance (41) arranged side by side, and the resistance value of the resistance (41) is 50-1000Ω.