Plasma operation equipment aging test tool

Abstract

The utility model discloses an aging test tool for plasma operation equipment, which comprises a case, an operation panel, a control box, an input / output wire harness, a plurality of load resistors, a plurality of temperature sensors and at least one group of cooling fans, and a display screen, a control switch, an indicator light and an operation button are arranged on the operation panel on the front side surface of the case; the control box is fixedly mounted on a bottom plate of the case, and a control unit is arranged in the control box; one end of the input / output wire harness is connected with a plurality of plugs, and the other end extends into the case and is connected with the control unit; the plurality of load resistors are arranged in the case in parallel, and gaps are formed between the load resistors and the bottom plate; the plurality of temperature sensor probes are respectively fixed on the surfaces of the plurality of load resistors one by one; the display screen, the control switch, the indicating lamp, the operation button, the load resistor, the temperature sensor and the cooling fan are all connected with the control unit. According to the utility model, multi-aspect tests can be carried out on the plasma operation equipment, and the accuracy and consistency of the tests are ensured.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, and in particular relates to an aging test fixture for plasma surgical equipment. Background Technology

[0002] Plasma surgical devices are electrosurgical instruments that use radio frequency energy to excite electrolytes to form low-temperature plasma, thereby achieving functions such as tissue cutting, ablation, and hemostasis. They have been widely used in electrosurgical procedures, and have shown significant advantages, especially in the field of minimally invasive surgery.

[0003] According to the failure rate characteristic curve (bathtub curve), the product failure rate changes over time in three stages: early failure period, random failure period, and wear failure period. Aging tests before the product leaves the factory can expose product defects before leaving the factory, eliminate products that fail early, and improve the reliability of the products leaving the factory.

[0004] Aging tests are conducted on plasma surgical equipment before it leaves the factory, a crucial step to ensure its stability and reliability in actual use. Aging test fixtures are used to perform aging tests and performance evaluations on plasma surgical equipment, directly impacting the accuracy and efficiency of the tests. These fixtures use resistors to provide a stable load for the plasma surgical equipment. When the load resistor operates at high power for extended periods, it generates heat, causing changes in the load's temperature and resistance value. Currently, aging test fixtures for plasma surgical equipment have the following problems: 1. They use natural cooling or single-sided fan cooling, resulting in low heat dissipation efficiency; 2. The fan speed is fixed, and the cooling rate is not adjusted in real time according to the load temperature, leading to large fluctuations in the load's resistance value, affecting test accuracy and consistency; 3. They fail to monitor and record the content and timing of product failures during the aging test in real time, hindering the analysis and improvement of product failures. Summary of the Invention

[0005] To address the aforementioned problems, the purpose of this invention is to provide an aging test fixture for plasma surgical equipment.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0007] An aging test fixture for a plasma surgical device includes a chassis, an operation panel, a control box, input / output wiring harnesses, several load resistors, several temperature sensors, and at least one set of cooling fans. The operation panel is located on the front side of the chassis and includes a display screen, control switches, indicator lights, and operation buttons. The control box is fixedly mounted on the bottom plate of the chassis and houses a control unit. The input / output wiring harness includes a main wiring harness, one end of which is connected to multiple branch wiring harnesses. Each branch wiring harness is connected to multiple plugs required for the operation of the plasma surgical device, and the other end extends into the chassis to connect to the control unit. The several load resistors, several temperature sensors, and at least one set of cooling fans are also included. The load resistors are arranged in parallel inside the chassis and fixedly mounted on the chassis base plate, with gaps between the load resistors and the base plate; the temperature sensor probes are fixed one by one on the surface of the load resistors; each set of cooling fans includes an intake fan and an exhaust fan, which are symmetrically mounted on the two side walls inside the chassis and located on both sides of the load resistors; the display screen, control switch, indicator lights, operation buttons, the load resistors, the temperature sensors, and at least one set of cooling fans are all connected to the control unit, and a current sensor is connected in series in the working circuit connecting the load resistors and the control unit.

[0008] Furthermore, the plugs connected to the ends of the multiple branch wire harnesses of the above-mentioned input and output wire harness are respectively a single-pole surgical electrode plug, a bipolar surgical electrode plug, a neutral electrode plug, a single-pole foot switch plug, and a bipolar foot switch plug.

[0009] Furthermore, the aforementioned control unit includes an MCU controller. Multiple ADC ports of the MCU controller are respectively connected to several temperature sensors and current sensors, which are used to receive the temperature signals of the corresponding load resistors acquired by the temperature sensors and the current signals of the working circuit of the load resistors. The PWM port is connected to at least one set of cooling fans through a speed control circuit. Multiple I / O ports are respectively connected to several load resistors through several relays to provide load for the operation of the plasma surgical equipment. One I / O port is connected to an indicator light through a drive circuit.

[0010] Due to the adoption of the technical solution described above, this utility model has the following advantages:

[0011] This aging test fixture for plasma surgical equipment features a simple structure, reasonable design, and easy operation. It adjusts the speed of the cooling fan in real time based on the temperature signal from the temperature sensor probe, thereby regulating the airflow of the intake and exhaust systems and controlling the temperature of the load resistor within a stable range. This ensures the accuracy and consistency of the test and provides high heat dissipation efficiency. It can perform multi-faceted testing on plasma surgical equipment, improving production efficiency. Furthermore, it allows for real-time monitoring and recording of product failure details and timing during the aging test, facilitating the analysis and improvement of product failures and demonstrating significant potential for widespread application. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural schematic diagram of the aging test fixture for plasma surgical equipment of this utility model;

[0013] Figure 2 yes Figure 1 A schematic diagram of the operation panel in the diagram;

[0014] Figure 3 yes Figure 1 A schematic diagram of the input / output harness structure in the diagram;

[0015] Figure 4 This is a schematic diagram of the internal structure of the aging test fixture for plasma surgical equipment of this utility model;

[0016] Figure 5 This is a control principle diagram of an embodiment of the aging test fixture for plasma surgical equipment of this utility model;

[0017] In the diagram: 1 - Main wiring harness; 2 - Operation panel; 3 - Control box; 4 - Exhaust fan; 5 - Intake fan; 6 - Connector; 7 - Base plate; 8 - Load resistor; 9 - Branch wiring harness; 10 - Display screen; 11 - Start button; 12 - Pause button; 13 - Reset button; 14 - Emergency stop switch; 15 - Alarm indicator light; 16 - Power switch; 17 - Neutral electrode plug; 18 - Monopolar surgical electrode plug; 19 - Bipolar surgical electrode plug; 20 - Bipolar foot switch plug; 21 - Monopolar foot switch plug; 22 - Temperature sensor probe; 23 - Chassis; 24 - Current sensor. Detailed Implementation

[0018] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0019] like Figures 1-4As shown, the aging test fixture for the plasma surgical equipment includes a chassis 23, a control box 3, input / output wiring harnesses, several load resistors 8, several temperature sensors, and at least one cooling fan. The chassis 23 has an operation panel 2 on its front side, which includes a display screen 10, a power switch 16, an emergency stop switch 14, an alarm indicator light 15, a start button 11, a pause button 12, and a reset button 13. The control box 3 is fixedly mounted on the base plate 7 of the chassis 23 and contains a control unit. The input / output wiring harnesses include a main wiring harness 1, with one end connected to multiple branch wiring harnesses 9, and the ends of the branch wiring harnesses... Each component is connected to a monopolar surgical electrode plug 18, a bipolar surgical electrode plug 19, a neutral electrode plug 17, a monopolar foot switch plug 21, and a bipolar foot switch plug 20, respectively. Each plug is connected to the monopolar surgical electrode socket, bipolar surgical electrode socket, neutral electrode socket, monopolar foot switch socket, and bipolar foot switch socket of the plasma surgery device. The other end of the main wiring harness extends into one side of the chassis and connects to the control unit through the end interface. The plurality of load resistors 8 are arranged in parallel inside the chassis and fixedly mounted on the chassis base plate 7 by connectors 6. The plurality of load resistors are insulated from the base plate. The enclosure has gaps of 10-20mm to facilitate heat dissipation; the plurality of temperature sensor probes 22 are respectively fixed on the surfaces of the plurality of load resistors 8; each set of cooling fans includes an intake fan 5 and an exhaust fan 4, which are symmetrically installed on the inner side walls of the chassis 23 and located on both sides of the plurality of load resistors 8. Cool air enters the chassis through the intake fan and the heat from the load resistors is exhausted from the chassis through the exhaust fan; the display screen, control switch, indicator lights, operation buttons, the plurality of load resistors, the plurality of temperature sensors, and at least one set of cooling fans are all connected to the control unit. A current sensor is connected in series in the working circuit of the load resistor and the control unit to monitor the current in the working circuit of the load resistor in real time. Several load resistors form a working circuit with the plasma surgery equipment through corresponding branch harnesses that are respectively connected to the monopolar surgical electrode plug, bipolar surgical electrode plug and neutral electrode plug, so as to provide a stable load for the plasma surgery equipment when it is working. Several temperature sensor probes transmit the temperature signal of the corresponding load resistor to the control unit in real time. The control unit controls the working time of the plasma surgery equipment and switches the load resistors through corresponding branch harnesses that are respectively connected to the monopolar foot switch plug and bipolar foot switch plug.

[0020] The aforementioned display screen can show the current time, load resistance temperature, cooling fan speed, current mode, excitation status, number of completed cycles, and alarm information in real time. When the aging test of the plasma surgical equipment fails, it can query detailed information such as the time of failure, load resistance temperature, cooling fan speed, current mode, excitation status, number of completed cycles, and alarm information.

[0021] The aforementioned power switch, emergency stop switch, start button, pause button, and reset button control the power supply to and from the aging test, stop the test in an emergency, start the test program, pause the test program, and reset the test program, respectively. When the alarm indicator light is on, it indicates that an abnormality has occurred during the aging test.

[0022] like Figure 5As shown, the aging test fixture for the plasma surgical equipment of this utility model uses resistors R1, R2, and R3 with different resistance values ​​as load resistors, and temperature sensors T1, T2, and T3 as temperature sensors. The control unit includes an MCU controller, whose multiple ADC ports are respectively connected to temperature sensors T1, T2, and T3, and current sensor U1. The PWM1 port is connected to the base of transistor Q1 via resistor R5. The base of transistor Q1 is connected to the emitter and grounded via resistor R4, and the collector is connected to... The intake fan 5 motor M1 and the exhaust fan 4 motor M2 are connected in parallel. I / O ports 1, 2, and 3 are respectively connected to the first terminals of the coils of relays K1, K2, and K3. The first contacts of relays K1, K2, and K3 are respectively connected to one end of resistors R1, R2, and R3, and their second contacts are all connected. The other ends of resistors R1, R2, and R3 are also connected. I / O port 4 is connected to the first terminals of the coils of relays K4 and K5. The moving contact of relay K4 is connected to the coils of relays K1, K2, and K3. The second contact of electrical appliance K3 is connected; the moving contact of relay K5 is connected to the terminals of resistors R1, R2, and R3; the first stationary contacts of relays K4 and K5 are connected to the bipolar surgical electrode, and the second stationary contacts are connected to the unipolar surgical electrode and the neutral electrode, respectively; the I / O5 port is connected to the base of transistor Q2 via resistor R7; the base of transistor Q2 is connected to the emitter and grounded via resistor R6; the collector is connected to one end of alarm indicator LED1; the I / O6 port is connected to the first terminal of the coil of relay K6; the I / O7 and I / O8 ports are connected to relays K7, K4, K5, K6, K6, K7 ... The first end of the coil of relay K8 is connected; the first contact of relay K6 is connected to the moving contact of relay K8; the second contact of relay K6, the first stationary contact and the second stationary contact of relay K8 are all connected to a single-pole foot switch; the first contact and the second contact of relay K7 are both connected to a double-pole foot switch; the power supply terminal of the MCU controller, the second end of the coils of relays K1, K2, K3, K4, K5, K6, K7, and K8, and the other end of the alarm indicator LED1 are all connected to a 12V power supply; the ground terminal of the MCU controller is grounded.

[0023] The transistors Q1 and Q2 mentioned above are NPN type transistors.

[0024] The working principle of this aging test fixture for plasma surgical equipment is as follows: Temperature sensors T1, T2, and T3 convert the temperature signals of the corresponding load resistors into voltage signals and transmit them to the MCU controller. Based on the temperature values ​​converted from the received temperature signals, the MCU controller outputs PWM signals with different duty cycles at the PWM1 port to adjust the speeds of the intake and exhaust fans in real time, thereby regulating the airflow and controlling the temperature of the load resistors to remain within a stable range. The MCU controller outputs high and low levels through I / O1, I / O2, and I / O3 ports to control relays K1, K2, and K3 to connect resistors R1, R2, and R3 to the test circuit, respectively. The I / O1, I / O2, and I / O3 ports alternately output low levels for 30 minutes per port, with a total of 90 minutes constituting one cycle. A total of 16 aging test cycles are performed. The total duration is 24 hours. The high and low levels output by I / O4 port control the switching of relays K4 and K5, thereby switching the load resistor connected to either the monopolar or bipolar surgical electrode. The high and low levels output by I / O6 and I / O7 ports control the on / off states of relays K1 and K2, respectively, thereby controlling the activation or deactivation of the monopolar and bipolar surgical electrodes. The single activation cycle for I / O6 and I / O7 ports is: I / O7 port low level 10s, I / O7 port high level 30s, I / O6 port low level 10s, I / O6 port high level 30s, I / O6 port low level 10s, I / O6 port high level 30s, I / O6 port low level 10s, I / O6 port high level 30s, for a total of 120s. The high and low levels output by I / O8 port control the switching of relay K8, thereby controlling the switching of the monopolar surgical electrode between cutting and coagulation modes. The single activation cycle for I / O8 port is: I / O8 port low level 10s, I / O8 port high level 70s.

[0025] When the temperature of the load resistor exceeds the preset threshold, the I / O5 port of the MCU controller outputs a high level, the alarm indicator LED1 lights up, indicating that the test result is abnormal, the test stops, and the time and fault details of the abnormality are recorded.

[0026] The current sensor U1 transmits the current signal to the MCU controller in real time. When the plasma surgical device is in the ignition state, the load has no working current, or the load current exceeds the specified range, the I / O5 port of the MCU controller outputs a high level, the alarm indicator LED1 lights up, indicating that the test result is abnormal, the test stops, and the time point of the abnormality and the fault content are recorded.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A testing fixture for aging of plasma surgical equipment, characterized in that: It includes a chassis, an operation panel, a control box, input / output wiring harnesses, several load resistors, several temperature sensors, and at least one set of cooling fans. The operation panel is located on the front side of the chassis and includes a display screen, control switches, indicator lights, and operation buttons. The control box is fixedly mounted on the bottom plate of the chassis and houses a control unit. The input / output wiring harnesses include a main wiring harness, one end of which is connected to multiple branch wiring harnesses. Each branch wiring harness is connected to multiple plugs required for the operation of the plasma surgical device, and the other end extends into the chassis to connect to the control unit. The several load resistors are located within the chassis. The load resistors are arranged in parallel and fixedly mounted on the base plate of the chassis, with gaps between them and the base plate. Several temperature sensor probes are fixed to the surfaces of the load resistors. Each cooling fan group includes an intake fan and an exhaust fan, which are symmetrically mounted on the two side walls inside the chassis, located on either side of the load resistors. The display screen, control switch, indicator lights, operation buttons, the load resistors, the temperature sensors, and at least one cooling fan group are all connected to the control unit. A current sensor is connected in series in the working circuit connecting the load resistors to the control unit.

2. The aging test fixture for plasma surgical equipment according to claim 1, characterized in that: The multiple branch wires of the input / output harness are respectively connected to plugs such as a monopolar surgical electrode plug, a bipolar surgical electrode plug, a neutral electrode plug, a monopolar foot switch plug, and a bipolar foot switch plug.

3. The aging test fixture for plasma surgical equipment according to claim 1, characterized in that: The control unit includes an MCU controller. Multiple ADC ports of the MCU controller are connected to a number of temperature sensors and current sensors, respectively, to receive temperature signals from the corresponding load resistors and current signals from the working circuits of the load resistors. A PWM port is connected to at least one set of cooling fans through a speed control circuit. Multiple I / O ports are connected to a number of load resistors through a number of relays to provide load for the operation of the plasma surgical equipment. One I / O port is connected to an indicator light through a drive circuit.

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