System for rapidly and accurately sampling output power of high-frequency surgical equipment
By introducing current, voltage, and power sampling modules and feedback control from a DSP processor into the high-frequency surgical equipment, the response problem of the high-frequency surgical equipment under different tissue impedances is solved, achieving fast and precise constant power output, and improving the uniformity of cutting and the safety of operation.
Patent Information
- Application Number
- CN202423196036.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2034-12-24
AI Technical Summary
Existing high-frequency surgical equipment cannot respond quickly and maintain constant power output when faced with different tissue impedances, resulting in uneven and inconsistent cutting, slow feedback time, and long sampling cycles, which affect the accuracy of operation.
It employs a current sampling module, a voltage sampling module, a power sampling module, a DSP processor module, and a feedback control module, combined with a phase compensation module, to achieve fast and accurate three-loop closed-loop control of constant current, constant voltage, and constant power. Real-time feedback control is achieved through a high-speed analog multiplier and a DSP processor.
It enables rapid power sampling and precise control of high-frequency surgical equipment, shortens sampling time, improves the smoothness of operation and the uniformity of cutting, reduces the generation of sparks and smoke, and improves the accuracy and safety of operation.
Smart Images
Figure CN223955681U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of medical apparatus and instruments, and particularly relates to a system for rapidly and accurately sampling output power of high-frequency surgical equipment. BACKGROUND
[0002] At present, high-frequency surgical equipment cannot quickly respond to different tissue impedances and maintain constant power output in clinical application, and problems such as long cutting mode response time, a little spark or smoke, unsmooth cutting, uneven cutting, slow response of coagulation, slow feedback time and the like occur. Through in-depth research on the causes of these problems by the inventor, it is found that the existing high-frequency surgical equipment cannot timely adjust the voltage, current and power size of output, which is caused. The currently used sampling circuit inputs the high-frequency waveform after RC filtering to a single-chip microcomputer or a sampling chip, and the whole sampling cycle response time is relatively long. In this time, the equipment operator can obviously feel that the operation is not smooth, the operation force is inconsistent, fine cutting cannot be achieved, and the cutting effect and process are not satisfactory. SUMMARY
[0003] The utility model wants to solve the technical problem: overcome the above-mentioned technical defects, and propose a system for output power of high-frequency surgical equipment which can rapidly and accurately sample power measurement, and can realize constant current, constant voltage and constant power three-loop closed-loop control through feedback control.
[0004] In order to solve the above technical problems, the technical scheme provided by the utility model is: a system for rapidly and accurately sampling output power of high-frequency surgical equipment, comprising: a current sampling module, a voltage sampling module, a power sampling module, a DSP processor module and a feedback control module; the current sampling module and the voltage sampling module respectively collect current information and voltage information of the target equipment; the current sampling module and the voltage sampling module respectively output the current information and the voltage information to the DSP processor module and the power sampling module; the output of the power sampling module is connected to the DSP processor module; and the DSP processor module controls the target equipment through the feedback control module.
[0005] The above-mentioned scheme is further improved in that: the current sampling module, the voltage sampling module and the power sampling module are further connected with a phase compensation module.
[0006] The above-mentioned scheme is further improved in that: the current sampling module comprises a current transformer sampling circuit, a differential amplification circuit, a direct-current blocking capacitor and a full-wave amplification rectification circuit connected in sequence.
[0007] The above-mentioned scheme is further improved in that: the voltage sampling circuit comprises a high-voltage capacitor coupling board sampling circuit, a following amplification circuit, a direct-current blocking capacitor and a full-wave amplification rectification circuit connected in sequence.
[0008] The further improvement of the above scheme is that the power sampling module comprises a high-speed analog multiplier and a high-speed following amplification circuit connected in sequence.
[0009] The further improvement of the above scheme is that the phase compensation module comprises an active high-speed RC phase-shifting circuit.
[0010] The further improvement of the above scheme is that the DSP processor module has a high-speed sampling ADC module and a DSP sampling processing algorithm module.
[0011] The further improvement of the above scheme is that the DSP processor module controls the voltage, current and power of the target device through the feedback control module.
[0012] The system for rapidly and accurately sampling output power of high-frequency surgical equipment provided by the utility model rapidly samples current and voltage, then carries out hardware calculation through a high-speed analog multiplier, rapidly obtains a power value, and makes feedback control rapidly through a DSP processor, so that constant current, constant voltage and constant power three-loop closed-loop control is rapidly and accurately realized. Furthermore, the system for rapidly and accurately sampling output power of high-frequency surgical equipment provided by the utility model is more accurate in waveform through direct sampling. BRIEF DESCRIPTION OF DRAWINGS
[0013] The utility model will be further described in connection with the drawings.
[0014] Figure 1 It is a preferred embodiment system structure schematic view of the utility model.
[0015] Figure 2 It is Figure 1 The output current sampling circuit diagram in the middle.
[0016] Figure 3 It is Figure 1 The output voltage sampling circuit diagram in the middle.
[0017] Figure 4 It is Figure 1 The output power sampling circuit diagram in the middle.
[0018] Figure 5 It is Figure 1 The feedback control system (three-loop closed-loop control) schematic view in the middle.
[0019] Figure 6 It is Figure 1 The waveform sampling schematic view in the middle.
[0020] Figure 7 It is the waveform schematic view of the input and output of the traditional mode.
[0021] Figure 8It is the waveform schematic diagram of sampling input and output in the utility model. DETAILED DESCRIPTION
[0022] The system for rapidly and accurately sampling output power of high-frequency surgical equipment of the embodiment, as shown in the figure, comprises a current sampling module, a voltage sampling module, a power sampling module, a phase compensation module, a DSP processor module and a feedback control module. Figure 1
[0023] The current sampling module and the voltage sampling module collect current information and voltage information of the target equipment respectively, and the collected current information and voltage information are divided into two paths, one of which is directly sent to the DSP processor module, and the other is sent to the power sampling module after passing through the phase compensation module, and then output to the DSP processor module; the DSP processor module controls the current, voltage and power of the target equipment through the feedback control module.
[0024] As shown in the figure, Figure 2 The current sampling module comprises a current transformer L6, a sampling load R64, high-speed operational amplifiers U7 and U8, a direct-current blocking capacitor C43, a zero-calibration potentiometer RP1 and other necessary capacitors and resistors. The high-frequency output of the target equipment is sampled through the current transformer L6, the sampled signal is formed into a voltage signal through the load R64, the voltage signal is amplified by 1 times through the operational amplifier U7A, the amplified signal passes through the direct-current blocking capacitor C43 to prevent some low-frequency signals from interfering with the sampling result, the signal is then rectified by the operational amplifier U7B and the operational amplifier U8 to flip the negative half-axis part of the signal along the X axis into the positive half-axis, and the signal is rectified into a positive half-wave signal with doubled frequency, thereby completing the collection of the current signal. Finally, the signal is output to the ADC sampling module of the DSP processor for sampling calculation and processing, and is also output to the phase compensation circuit; when the target equipment does not output high-frequency energy, the current sampling is zero through the zero-calibration potentiometer RP1.
[0025] As shown in the figure, Figure 3 As shown, the voltage sampling module includes voltage coupling capacitor plate CAP_RFA / CAP_RFB, sampling load R78 / R85, high-speed operational amplifier U10 / U9 / U11, DC blocking capacitor C51, zero calibration potentiometer RP2, and other necessary capacitors and resistors, etc. The high-frequency output of the target device is sampled through the voltage coupling capacitor plate, the sampled signals are formed into voltage signals through the load R78 / R85, and the two voltage signals are differentially amplified to twice through operational amplifier U10A and U10-B and operational amplifier U9B, respectively. The amplified signals pass through the DC blocking capacitor C51 to prevent some low-frequency signals from interfering with the sampling results. Then, the signals pass through the operational amplifier U9A to full-wave rectify the signal negative half-axis part along the X-axis to flip into the positive half-axis, and to rectify the signal into a frequency-doubled positive half-wave signal, which completes the voltage signal sampling. Finally, the signal is output to the ADC sampling module of the DSP processor for sampling calculation and processing, and is also output to the phase compensation circuit. When the target device does not output high-frequency energy, the voltage sampling is zero through the zero calibration potentiometer RP2.
[0026] As shown in Figure 4 , the power sampling module includes analog multiplier U12, high-speed operational amplifier U28, zero calibration potentiometer RP3, and other necessary capacitors and resistors, etc. The current and voltage positive half-wave signals are input to the phase compensation circuit to obtain signals of the same phase. The voltage and current signals are input to the X1 / Y1 of the analog multiplier U12, the X2 / Y2 of the analog multiplier U12 is connected to the ground, and the W pin of the analog multiplier U12 outputs a value, W = (X1−X2)(Y1−Y2) / 10V+Z; wherein X2 and Y2 are connected to the ground and are 0, so the formula is simplified as: W = X1*Y1 / 10+Z. The analog multiplier W signal is amplified by 1 times through the operational amplifier U28A and is output to the DSP processor through the voltage follower U28B. When the target device does not output high-frequency energy, the W sampling of the analog multiplier U12 is zero through the zero calibration potentiometer RP3.
[0027] As shown in Figure 5 , the feedback control module includes current limiting, voltage limiting, power limiting, etc. According to the requirements of the target device, the control rules of the DSP processor are adjusted. According to the current, voltage, and power values, the maximum protection values of the current, voltage, and power are limited in different modes to protect the high-frequency energy output from overvoltage, overcurrent, and over-power phenomena. At the same time, the change of different impedances in the output process can quickly adjust the voltage of the high-frequency output of the target device to be stable in the constant voltage state, and the output of the current is maintained in the constant power state.
[0028] As shown in Figure 6As shown, the waveform sampling includes the high-frequency output coupling waveform (trace 1), the current sampling waveform after phase compensation (trace 2), the voltage sampling waveform after phase compensation (trace 3), and the power sampling waveform (trace 4).
[0029] like Figure 7 As shown, the waveform diagram of the input and output is obtained by the traditional sampling method. The waveform to be sampled is (light trace 1), the actual sampled waveform is (light trace 3), and the stabilization time of the actual sampled waveform is about 700us.
[0030] like Figure 8 As shown in the figure, this embodiment shows the waveform diagram of the sampling input and output after the input is put into use. The waveform to be sampled is (light trace 1), the actual sampled waveform is (light trace 3), and the stabilization time of the actual sampled waveform is about 110us.
[0031] In this embodiment, the high-frequency output energy waveform is reduced to the range of chip acquisition by the high-frequency output sine wave (continuous or discontinuous) through the mutual inductor and coupling capacitor plate. By rectifying the waveform, the sampling time can be greatly shortened. The actual sampling waveform is around 110us in the existing scheme, which is 7 times faster than the traditional hardware sampling time of 700us.
[0032] Meanwhile, a 150MHz DSP processor (TMS320F28335) is used in the processor, employing a 12-bit dual-channel ADC with a maximum synchronous sampling rate of 8.33MHz, increasing the sampling speed to 8.33 million times per second. The single DSP processing sampling time is shortened to 120ns, and the software sampling algorithm calculation cycle is 60us. In contrast, the traditional sampling method uses a 12-bit ADC with a maximum sampling rate of 2.4MHz, with a single processing sampling time of up to 417ns and a software sampling algorithm calculation cycle of 1ms. The improved hardware performance, increased processing speed, and optimized software algorithm enable fast and accurate sampling in the entire control system.
[0033] This utility model is not limited to the above embodiments. All technical solutions formed by equivalent substitutions fall within the protection scope claimed by this utility model.
Claims
1. A system for fast and accurate sampling of the output power of high frequency surgical equipment, characterized in that, The application relates to a current sampling module, a voltage sampling module, a power sampling module, a DSP processor module and a feedback control module. The current sampling module and the voltage sampling module respectively collect current information and voltage information of a target device. The current sampling module and the voltage sampling module respectively output the current information and the voltage information to the DSP processor module and the power sampling module.
2. The system for fast and accurate sampling of the output power of high-frequency surgical equipment according to claim 1, characterized in that: The DSP processor module controls the target device through the feedback control module.
3. The system for fast and accurate sampling of the output power of high-frequency surgical equipment according to claim 2, characterized in that: A phase compensation module is further connected between the current sampling module, the voltage sampling module and the power sampling module.
4. The system for fast and accurate sampling of the output power of high-frequency surgical equipment according to claim 2, characterized in that: The current sampling module comprises a current transformer sampling circuit, a differential amplification circuit, a direct-current isolation capacitor and a full-wave amplification rectification circuit which are sequentially connected.
5. The system for fast and accurate sampling of the output power of high-frequency surgical equipment according to claim 2, characterized in that: The voltage sampling module comprises a high-voltage capacitor coupling plate sampling circuit, a follow-up amplification circuit, a direct-current isolation capacitor and a full-wave amplification rectification circuit which are sequentially connected.
6. The system for fast and accurate sampling of high frequency surgical device output power according to claim 2, wherein: The power sampling module comprises a high-speed analog multiplier and a high-speed follow-up amplification circuit which are sequentially connected.
7. The system for fast and accurate sampling of high frequency surgical device output power according to claim 2, wherein: The phase compensation module comprises an active high-speed RC phase-shifting circuit.
8. The system for fast and accurate sampling of high frequency surgical device output power according to claim 2, wherein: The DSP processor module comprises a high-speed sampling ADC module and a DSP sampling processing algorithm module. The DSP processor module controls the voltage, the current and the power of the target device through the feedback control module.