Current peak detection device, high voltage generator and vascular calcification treatment equipment

Abstract

The current peak detection device, high voltage generator and vascular calcification treatment equipment according to the present invention includes a PCB Rogowski coil, a sampling resistor, a signal amplifier circuit, an integration and voltage holding circuit and a microcontroller, the PCB Rogowski coil induces a current signal in the line to be measured and obtains the corresponding induced electromotive force, the sampling resistor is connected to the PCB Rogowski coil, the signal amplifier circuit is connected to the sampling resistor, the integration and voltage holding circuit is connected to the signal amplifier circuit, the microcontroller is connected to the integration and voltage holding circuit to ADC sample the maximum value of the voltage signal, and obtain the current peak of the current signal in the line to be measured according to the ADC sampling data and the preset current location data. The present invention realizes real-time monitoring of the pulse current, accurately detects the current peak of the pulse current, does not affect the existing high voltage discharge circuit, and has the advantages of high safety, fast response speed, stable process, high consistency and low cost.

Description

[Technical field]

[0001] [Cross-references to related literature] This application claims priority to Chinese patent application number CN202111005958.6, filed on August 30, 2021, entitled "Current peak detection device, high voltage generator and vascular calcification treatment equipment," the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the field of current detection technology, and in particular to a current peak detection device, a high voltage generator, and a vascular calcification treatment equipment. [Background technology]

[0003] Vascular calcification refers to the pathological process of hydroxyapatite mineral deposition in the vascular system. In clinical practice, it is commonly seen in atherosclerotic plaque, diabetes, aging, and chronic renal failure, and uremia in blood vessels and heart valves. Clinical and epidemiological data show that vascular calcification is a common clinical pathological manifestation that is universally present in patients with atherosclerosis, hypertension, diabetic vascular lesions, vascular damage, and chronic nephropathy, and is an important risk factor for cardiovascular disease, occurring in 80% of vascular damage and 90% of coronary artery disease. Vascular calcification in infancy, uremic small artery calcification, and calcified valvular disease can be life-threatening. The onset of vascular calcification in young patients is more common in diabetic patients, and elderly patients often have abnormal blood lipid levels. Recent research in vascular biology and cardiovascular imaging has shown that the site and degree of vascular calcification can be used as early warning indicators of stroke and ischemic heart disease, and as predictors of cardiovascular mortality in patients with type II non-insulin-dependent diabetes mellitus. Vascular calcification has been considered to be a passive process of calcium salt deposition between tissues due to an imbalance in biological calcium-phosphorus metabolism. Vascular calcification increases the stiffness and reduces the adaptability of the vascular wall, leading to myocardial ischemia, left ventricular hypertrophy and heart failure, thrombus formation, and plaque rupture, which is one of the important factors in the high incidence and high mortality of cardiovascular disease, and is also an important marker molecule for the development of cardiovascular disease.

[0004] At present, the treatment of vascular calcification mainly includes medical treatment and surgical treatment. Medical treatment uses lipolytic drugs to stabilize plaque in blood vessels and delay the progression of atherosclerosis, or regulates the overall calcium-phosphorus metabolism through calcium-phosphorus balance regulators such as phosphate binders and diphosphates to reduce calcium salt deposition and calcium crystal nucleation. However, the effects of these drugs on vascular calcification are still unclear, and the effect on patients with late-stage vascular calcification is relatively poor. Surgical treatment includes interventional treatment and arterial bypass grafting. Interventional devices include traditional balloons, special balloons, and percutaneous intraluminal plaque resection. These equipment and techniques still have many limitations and are prone to serious complications. Traditional balloons are only effective against soft lesion expansion, and in the treatment of calcified lesions of blood vessels, it is necessary to restore the lumen again with higher pressure, but sustained high pressure is prone to secondary mechanical damage of blood vessels and even rupture of blood vessels. Special balloons, such as implantable and spinous balloons, have special conditions for use, and operators must undergo long-term training. Percutaneous intraluminal plaque rotation resection equipment is expensive, complicated to operate, long operation time, and difficult to solve the risk of distal embolism and high vascular damage. In order to solve the above problems in calcified vascular treatment, ultrasonic lithotripsy and balloon angioplasty technology are combined, and the use of sound waves to treat calcified arterial disease can better overcome the shortcomings of traditional equipment and technology in the treatment process, and is promising as a next-generation calcified vascular treatment technology. Summary of the Invention [Problem to be solved by the invention]

[0005] The equipment for treating vascular calcification is mainly composed of a consumable electrode, a connector, and an ultrasonic generator. During treatment, the electrode discharges the instantaneous current of the vascular calcification treatment equipment, which can reach hundreds of amperes, and the discharge voltage is high, which can reach 10,000 volts. Current vascular calcification treatment equipment does not have an electrode current sampling device, so it cannot capture the peak current during treatment in real time, and it is not possible to check the operation status of the equipment and the treatment status of the patient, thereby further analyzing the treatment results, and it is not possible to monitor the treatment effect in real time, and it is not possible to monitor the treatment status of the patient during the treatment and adjust the treatment strategy in a timely manner, so it is difficult to ensure the treatment effect and safety for the patient.

[0006] The conventional method of increasing the sampling resistance in the high voltage circuit affects the existing discharge circuit and poses a safety risk. The conventional method of adopting external electrode current sampling equipment is relatively easy to deploy during laboratory test verification, but in actual use, the cost of specialized equipment is generally high, and the equipment is large in volume, making it difficult to apply, inconvenient to install and carry, difficult to implement, and difficult to use in the field. In the conventional current mutual inductor method, magnetic saturation is inevitable due to the existence of a magnetic element in the mutual inductor, and the current measured during magnetic saturation is of no reference value. At the same time, the ferromagnetic element has a hysteresis effect, and there is a certain phase difference. [Means for solving the problem]

[0007] Therefore, an object of the present invention is to provide a current peak detection device, a high-voltage generator, and a vascular calcification treatment equipment which can realize real-time monitoring of pulse current, accurately detect the current peak of the pulse current, have the advantages of not affecting the existing discharge circuit, being highly safe, having a fast response speed, and a large saturation current, and furthermore have a simple structure, stable process, high consistency, and low cost.

[0008] To achieve the above object, a first aspect of an embodiment of the present invention provides a current peak detection device.

[0009] In one embodiment, the current peak detection device includes a PCB lock coil, a sampling resistor, a signal amplifier circuit, an integration and voltage holding circuit, and a microcontroller; Wherein the PCB Rogowski coil induces a current signal in the line to be measured and obtains a corresponding induced electromotive force; the sampling resistor is connected to the PCB Rogowski coil to obtain a sampling voltage corresponding to the induced electromotive force; the signal amplifier circuit is connected to the sampling resistor and amplifies and outputs the sampling voltage; The integration and voltage holding circuit is connected to the signal amplifier circuit, and integrates the amplified sampled voltage to obtain a voltage signal proportional to the current signal in the line to be measured, and holds a maximum value of the voltage signal; The microcontroller is connected to the integration and voltage holding circuit, performs ADC sampling on the maximum value of the voltage signal, and obtains the current peak of the current signal in the line to be measured based on the ADC sampling data and preset current location data.

[0010] In one embodiment, the PCB Rogowski coil includes a first coil portion and a second coil portion, The first coil portion and the second coil portion constitute an entire annular coil, the first coil portion and the second coil portion are removably connected; Here, the first coil portion and the second coil portion have conductors arranged in upper and lower layers, respectively, The corresponding conductors are connected vias to form wire turns and loop wires.

[0011] In one embodiment, the integrator and voltage holding circuit includes an RC integrator circuit and a first diode; the RC integrator circuit includes a first resistor and a first capacitor; Here, the first diode and the first resistor are connected in series between the output terminal of the signal amplifier circuit and the input terminal of the microcontroller, and the first capacitor is connected between the input terminal of the microcontroller and ground.

[0012] In one embodiment, the microcontroller further performs digital filtering on the ADC sampling data to filter out abnormal data in the plurality of ADC sampling data, and obtains an average value of the filtered plurality of ADC sampling data to obtain a current peak of a current signal in the measurement target line based on the current location data; Here, the abnormal data includes a minimum value and / or a maximum value of the plurality of ADC sampling data.

[0013] In one embodiment, the signal amplifier further includes a filter circuit disposed between the PCB Rogowski coil and the signal amplifier circuit.

[0014] In one embodiment, the filter circuit includes a common mode inductance disposed between an output terminal of the PCB Rogowski coil and the sampling resistor.

[0015] In one embodiment, the filter circuit includes a first magnetic bead and a second magnetic bead connected in parallel between the sampling resistor and the signal amplification circuit.

[0016] In one embodiment, the filter circuit includes a common mode filter capacitance and a differential mode filter capacitance, and the common mode filter capacitance and the differential mode filter capacitance are provided between the sampling resistor and the signal amplifier circuit.

[0017] In order to achieve the above object, a second aspect of the present invention provides a high voltage generator.

[0018] In one embodiment, a high voltage generator includes a power supply module, a boost circuit, and a current peak detection device according to any one of the above embodiments; Wherein, the power supply module is connected to the boost circuit and the microcontroller in the current peak detection device; The microcontroller in the current peak detection device is connected to the boost circuit, The PCB coil in the current peak detection device is provided at an output terminal of the boost circuit and induces a current signal in the line to be measured at the output terminal.

[0019] In order to achieve the above object, a third aspect of the present invention provides a vascular calcification treatment device.

[0020] In one embodiment, the vascular calcification treatment equipment includes the high voltage generator, a connector and a consumable electrode described in the above embodiment, wherein the output terminal of the high voltage generator is connected to the consumable electrode via the connector to form a high voltage discharge circuit. Effect of the Invention

[0021] The current peak detection device, high voltage generator and vascular calcification treatment equipment according to the present invention includes a PCB Rogowski coil, a sampling resistor, a signal amplification circuit, an integration and voltage holding circuit and a microcontroller. Here, the PCB Rogowski coil is used to induce a current signal in a line to be measured and obtain a corresponding induced electromotive force. The sampling resistor is connected to the PCB Rogowski coil and used to obtain a sampling voltage corresponding to the induced electromotive force. The signal amplification circuit is connected to the sampling resistor and amplifies and outputs the sampling voltage. The integration and voltage holding circuit is connected to the signal amplification circuit and is used to integrate the amplified sampling voltage, obtain a voltage signal proportional to the current signal in the line to be measured and hold the maximum value of the voltage signal. The microcontroller is connected to the integration and voltage holding circuit and performs ADC sampling on the maximum value of the voltage signal, and obtains the current peak of the current signal in the line to be measured based on the ADC sampling data and the preset current location data. In one aspect of the present invention, current sampling is performed through a PCB Rogowski coil, adopting non-contact detection, which does not affect the existing discharge circuit, and is highly safe, has a fast response speed, and can reach a saturation current of several thousand amperes. Moreover, the PCB coil has a simple structure, stable process, high consistency, and low cost. In another aspect of the present invention, the peak current can be stably and accurately measured each time by using a signal amplification circuit and an integration and voltage holding circuit, and the treatment effect can be monitored in real time when treatment is performed in a vascular calcification treatment equipment. [Brief description of the drawings]

[0022] The drawings described herein are intended to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and the description thereof are intended to illustrate the present invention and are not to be construed as unduly limiting the present invention. In the drawings, [Figure 1] 1 shows a block diagram of a current peak detection device provided according to an embodiment of the present invention; [Diagram 2]1 shows an overall configuration diagram of a PCB Rogowski coil provided in accordance with an embodiment of the present invention. [Diagram 3] FIG. 3 is a schematic structural diagram of the wire turns of the PCB Rogowski coil in region B of FIG. 2. [Figure 4] 2 is a specific circuit schematic diagram of a current peak detection device provided by an embodiment of the present invention; FIG. [Diagram 5] 1 shows a structural schematic diagram of a high voltage generator provided by an embodiment of the present invention. [Figure 6] 1 shows a structural schematic diagram of a vascular calcification treatment equipment provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] In order to allow those skilled in the art to better understand the technical aspects of the present invention, the technical aspects of the embodiments of the present invention will be described below clearly and completely in accordance with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Those skilled in the art should understand that all other embodiments obtained based on the embodiments of the present invention without creative labor should fall within the protection scope of the present invention.

[0024] It should be noted that the terms "first," "second," etc. in the present specification, claims, and the above-mentioned drawings are intended to distinguish between similar objects, and not to describe a particular order or priority. It should be understood that the data so used may be interchanged where appropriate, such that the embodiments of the present invention described herein may be practiced in an order other than that shown or described herein. Furthermore, the terms "comprise" and "have" and any variations thereof are intended to cover a non-exclusive inclusion, e.g., a process, method, system, product, or apparatus that includes a series of steps or units need not be limited to the steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to those processes, methods, products, or apparatus.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0026] Please refer to FIG. 1. FIG. 1 shows a block diagram of a current peak detection device provided by an embodiment of the present invention. As shown in FIG. 1, the current peak detection device 100 includes a PCB Rogowski coil 10, a sampling resistor 11, a signal amplifier circuit 12, an integration and voltage holding circuit 13, and a microcontroller 14. Here, the PCB Rogowski coil 10 is used to induce a current signal in a line to be measured and obtain a corresponding induced electromotive force. The sampling resistor 11 is connected to the PCB Rogowski coil 10 and is used to obtain a sampling voltage corresponding to the induced electromotive force. The signal amplifier circuit 12 is connected to the sampling resistor 11 and is used to amplify and output the sampling voltage. The integration and voltage holding circuit 13 is connected to the signal amplifier circuit 12 and performs integration processing on the amplified sampling voltage to obtain a voltage signal proportional to the current signal in the line to be measured, and holds the maximum value of the voltage signal. The microcontroller 14 is connected to the integration and voltage holding circuit 13 and performs ADC sampling on the maximum value of the voltage signal, and obtains the current peak of the current signal in the line to be measured from the ADC sampling data and the preset current location data.

[0027] Specifically, according to the induction principle of the PCB Rogowski coil 10, i.e., when the current flowing through the conductor in the PCB Rogowski coil 10 is I(t), a magnetic field is generated around the carrier conductor, and the closer to the carrier conductor, the stronger the magnetic field strength is, and the magnetic field strength from the carrier conductor r is H=(I(t)) / 2πr.

[0028] The magnetic induction strength here is B = (μ0I(t)) / 2πr, Here, the vacuum permeability μ0=4πx 10 -7 H / m, and π is the constant of the circumference of a circle.

[0029] There is a magnetic flux in the wire turns of the PCB Rogowski coil 10, and the magnetic flux per wire turn is φ=∫BdS. where S is the area of ​​a single wire turn, d is the differential symbol, and dS is the differential with respect to area. From the above formula, it can be seen that the amount of magnetic flux is correlated with the magnetic induction strength and the area of ​​the wire turn.

[0030] As can be seen from Faraday's law of electromagnetic induction, when the current to be measured changes, an induced electromotive force e(t) = -N dφ / dt = -M (dI(t)) / dt is generated in the coil.

[0031] In the formula, N is the number of wire turns, M is the coil mutual induction, dφ is the change in magnetic flux, dt is the change in time, and dI(t) is the change in current.

[0032] As can be seen from the formula for induced electromotive force, the derivative with respect to time of the induced electromotive force of the PCB Rogowski coil 10 and the current to be measured is proportional, so the waveform of the current to be measured cannot be reduced unless an integrating circuit is connected.

[0033] Since the induced electromotive force is correlated with the number of wire turns and the area of ​​the wire turns, the induced electromotive force can be increased by increasing the number of wire turns accordingly and increasing the amount of induced magnetic flux in the coil. On the other hand, the area of ​​the wire turns can be increased to a certain extent by appropriately increasing the width of the wire turns, thereby expanding the amount of magnetic flux passing through the hollow wire turns and increasing the induced electromotive force.

[0034] Therefore, the present invention uses the PCB Rogowski coil 10 to induce a current signal in the line to be measured, and obtains a corresponding induced electromotive force. The sampling resistor 11 is connected to the PCB Rogowski coil 10 to obtain a sampling voltage corresponding to the induced electromotive force. The signal amplifier circuit 12 is connected to the sampling resistor 11 to amplify and output the sampling voltage. The integration and voltage holding circuit 13 is connected to the signal amplifier circuit 12 to integrate the amplified sampling voltage to obtain a voltage signal proportional to the current signal in the line to be measured, and to hold the maximum value of the voltage signal. The microcontroller 14 is connected to the integration and voltage holding circuit 13 to ADC sample the maximum value of the voltage signal, and obtain the current peak of the current signal in the line to be measured based on the ADC sampling data and the preset current location data.

[0035] Here, the microcontroller 14 can set the sampling port as the ADC input and start the ADC sampling. A timer can also be arranged to periodically sample the ADC signal. The timing time can be adjusted as necessary. After counting down, when the count value reaches the set value 0, a timer interrupt occurs, the interrupt interval time becomes the set time, and the ADC sampling data is processed in the interrupt service function, and when an interrupt occurs, the interrupt flag bit is cleared to facilitate the next interrupt entry. At the same time, the count value is reloaded to the set count value and counted again. After receiving the ADC data, the primary sampling value can be obtained. Under the condition that the sampling time interval is short, the current change curve can be accurately reduced. Of course, by setting, only the numerical value of the corresponding phase, such as the peak current, can be sampled.

[0036] Here, in order to obtain the actual current in the line to be measured from the ADC sampling data, current location is required. That is, a reference current source is used to select current values ​​at regular intervals as reference values, and data corresponding to the current peak detection device 100 is obtained under the selected current. That is, when a set current flows in the line to be measured, the microcontroller 14 can sample the corresponding data in this state. Therefore, it is possible to obtain linear relationships corresponding to a plurality of stages. When the linear relationship is obtained, the data sampled by the microcontroller 14 corresponds one-to-one to the actual current of the line to be measured, and the actual current value at that time can be calculated from the corresponding data.

[0037] The current peak detection device 100 of the present invention can not only detect the peak current, but also reconstruct the complete current change curve in the line to be measured by setting the sampling frequency of the microcontroller 14.

[0038] In one embodiment, refer to FIG. 2. FIG. 2 shows the overall configuration of a PCB Rogowski coil provided by an embodiment of the present invention. The PCB Rogowski coil 10 includes a first coil portion 101 and a second coil portion 102 (two portions separated by a dashed line a in FIG. 2). The first coil portion 101 and the second coil portion 102 form an entire ring-shaped coil. The first coil portion 101 and the second coil portion 102 are detachably connected. Here, the first coil portion 101 and the second coil portion 102 are both arranged with conductors corresponding to the upper and lower layers. The corresponding conductors form wire turns by via connections, and loop wires are installed.

[0039] Specifically, refer to FIG. 3. FIG. 3 is a schematic diagram of the structure of the wire turn of the PCB Rogowski coil in the B region of FIG. 2. As shown in FIG. 3, the top layer and the lower layer of the PCB are formed with radially evenly spaced wiring along the circumference, and the conductors corresponding to the top layer and the lower layer are formed with via connection to form a wire turn, that is, the top layer and the lower layer of the PCB are respectively wired with equal intervals, and then the conductors of the top layer and the lower layer are connected by conductors to form a wire turn and set up a loop. A plurality of wire turns are uniformly distributed on the PCB. Since the voltage induced in a single turn is very weak, when a plurality of wire turns are connected in series in sequence, the induced voltage is improved to a certain extent. In order to facilitate installation and removal and not affect the connection of the existing line, in this embodiment, the PCB Rogowski coil 10 is manufactured into two annular parts, namely, a first coil part 101 and a second coil part 102. 2 are preferably two equal-sized semicircular structures that are connected together to form a complete PCB Rogowski coil 10. In practical use, the first coil section 101 and the second coil section 102 form one PCB Rogowski coil 10 after being connected together. During measurement, the line to be measured can be passed through the coil, and it can be easily removed as needed after the measurement is completed.

[0040] It is necessary to explain that, for the sake of simplicity, the specific structure of the wire turn only shows the B region in Fig. 2, and other regions can extend according to the rules in Fig. 3. Also, in other embodiments, the first coil section 101 and the second coil section 102 may be set to different sizes, since the two coil sections only need to be connected to form a complete PCB Rogowski coil.

[0041] In one embodiment, the current peak detection apparatus 100 further includes a filter circuit provided between the PCB Rogowski coil 10 and the signal amplifier circuit 12 .

[0042] In one embodiment, refer to Fig. 4. Fig. 4 shows a specific circuit of a current peak detection device 100 provided by an embodiment of the present invention. As shown in Fig. 4, the signal amplification circuit 12 includes a differential amplifier U1.

[0043] Specifically, the first input terminal (+ in the figure) and the second input terminal (- in the figure) of the differential amplifier U1 differentially amplify the sampling voltage across the sampling resistor 11, and output the amplified voltage to the output terminal. Here, the power supply terminal of the differential amplifier U1 is also connected to the power supply VCC, the bias port of the differential amplifier U1 is connected to the bias voltage VBIAS, and both the power supply terminal and the bias port of the differential amplifier U1 are connected to corresponding filter units.

[0044] In one embodiment, as shown in Fig. 4, the integration and voltage holding circuit 13 includes an RC integration circuit and a first diode D1. The RC integration circuit includes a first resistor R1 and a first capacitor C1. Here, the first diode D1 and the first resistor R1 are connected in series between the output terminal Vout of the signal amplifier circuit 12 and the input terminal of the microcontroller 14. The first capacitor C1 is connected between the input terminal of the microcontroller 14 and ground.

[0045] Specifically, the RC integrator circuit is used to integrate the output signal of the signal amplifier circuit 12. Since the derivative of the induced electromotive force of the PCB Rogowski coil and the measured current with respect to time is proportional, the measured current waveform cannot be reduced unless the integrator circuit is connected. Since a diode has a unidirectional conductive characteristic, the maximum voltage value of the first capacitor C1 can be maintained by providing the first diode D1. Even if the current drops, the maximum voltage value can be maintained, thereby ensuring that the peak current or current peak of the measured current is accurately sampled by the microcontroller 14.

[0046] 4, the current peak detection apparatus 100 further includes a second resistor R2. One end of the second resistor R2 is connected to the input terminal of the microcontroller 14, and the other end of the second resistor R2 is connected to the control terminal of the microcontroller 14 for discharging the voltage of the first capacitor C1 after the sampling of the input terminal of the microcontroller 14 is completed.

[0047] Specifically, after the signal is sampled at the ADC sampling port, which is the input terminal of the microcontroller 14, the voltage of the first capacitor C1 is discharged by controlling the port level state of the control terminal of the microcontroller 14. After the discharge, it can be sampled again.

[0048] In one embodiment, the current peak detection apparatus 100 further includes a second diode D2 connected between the input terminal of the microcontroller 14 and ground.

[0049] Specifically, a second diode D2 is provided between the input terminal of the microcontroller 14 and ground to prevent the tip voltage from becoming too high and ensure that the voltage at the input terminal (sampling port) of the microcontroller 14 is within a stable range.

[0050] In one embodiment, the filter circuit includes a common mode inductance L1 disposed between the output terminal of the PCB Rogowski coil 10 and the sampling resistor 11.

[0051] Specifically, the common mode inductance L1 (Common Mode Choke) is also called a common mode choke that suppresses the external radiation of electromagnetic waves generated in high-speed signal lines. The common mode inductance is essentially a bidirectional filter that filters common mode electromagnetic interference in the signal line while preventing itself from causing external electromagnetic interference and from affecting the normal operation of other electronic devices in the same electromagnetic environment. In other words, it filters common mode electromagnetic interference on the signal line while preventing itself from emitting electromagnetic interference to the outside.

[0052] In one embodiment, as shown in FIG. 4, the filter circuit includes a first magnetic bead L2 and a second magnetic bead L3 connected in parallel between a sampling resistor 11 and a signal amplification circuit 12.

[0053] Specifically, the first magnetic bead L2 and the second magnetic bead L3 correspond to a series connection of a resistor and an inductance, but the resistance and inductance values ​​both change according to the frequency. In this embodiment, it is used to remove differential mode interference, suppress high frequency noise and spike interference, and absorb electrostatic pulses. As shown in FIG. 4, the first magnetic bead L2 is connected between the first end of the sampling resistor 11 and the first input terminal of the differential amplifier U1, and the second magnetic bead L3 is connected between the second end of the sampling resistor 11 and the second input terminal of the differential amplifier U1.

[0054] In one embodiment, the filter circuit includes a common mode filter capacitance and a differential mode filter capacitance disposed between the sampling resistor 11 and the signal amplifier circuit 12 .

[0055] Specifically, as shown in Figure 4, the common mode filter capacitance includes a second capacitor C2 connected between the first input terminal of the differential amplifier U1 and ground, and a third capacitor C3 connected between the second input terminal of the differential amplifier U1 and ground. The differential mode filter capacitance includes a fourth capacitor C4 connected between the first input terminal and the second input terminal of the differential amplifier U1. The common mode filter capacitance and the differential mode filter capacitance are used to eliminate noise, and a more accurate voltage difference can be obtained after filtering.

[0056] In one embodiment, as shown in FIG. 4, the current peak detection device 100 further includes a third resistor R3 connected between the first magnetic bead L2 and the first input terminal of the differential amplifier U1, and a fourth resistor R4 connected between the second magnetic bead L3 and the second input terminal of the differential amplifier U1.

[0057] In one embodiment, as shown in Fig. 4, the current peak detection device 100 further includes a voltage dividing resistor. The voltage dividing resistor further includes a fifth resistor R5 and a sixth resistor R6. The fifth resistor R5 and the sixth resistor R6 are connected between the output terminal of the PCB Rogowski coil 10 and the sampling resistor 11.

[0058] In one embodiment, the microcontroller 14 is further used to digitally filter the ADC sampling data to filter abnormal data in the plurality of ADC sampling data. Furthermore, the microcontroller 14 obtains a current peak of the current signal in the measurement target line from the current location data by taking an average value of the plurality of ADC sampling data after filtering. Here, the abnormal data includes a minimum value and / or a maximum value of the plurality of ADC sampling data.

[0059] Specifically, when the microcontroller 14 obtains the corresponding current peak according to the value of one sampling in a preset period (the pulse current has a stable time at the peak), there may be a certain deviation. In order to avoid the influence of the deviation of the sampling data, in this embodiment, the abnormal data is filtered by digital filtering. That is, when sampling data, the data is processed after sampling multiple times, for example, the number of sampling times is 32 times, and the microcontroller 14 samples 32 times before processing the data, and sorts the 32 data from smallest to largest, and after the sorting is completed, the smallest set of data and the largest set of data are removed. Of course, the smallest and largest groups of data may be used according to the time situation. After that, the remaining data are averaged to obtain the effective data after the primary filtering. Based on this effective data and the current location data, the current peak of the current signal in the line to be measured is obtained.

[0060] In one embodiment, as shown in Figure 4, the current peak detection device 100 further includes a storage module 15 connected to the microcontroller 14. The storage module 15 is used to store the current peaks.

[0061] Specifically, the storage module 15 may be a Flash memory. The Flash memory is a serial SPI chip, and when data is stored, addressing is performed for each address, and a count value is automatically added each time one line of data is added. The top address that requires addressing is the number of data entries x data length. This count value is also stored. This data is stored at the end of the address of the Flash memory. When the current peak detection device 100 is used in vascular calcification treatment equipment, data information such as a device ID may be stored in the Flash memory. For example, the data storage format is as follows:

[0062] 01 02 03 04 05 00 01 0F 0A; where 01 02 03 04 05 are the consumable ID numbers, 00 01 is the number of times the data was recorded, 0F 0A is the numerical value for current.

[0063] The data storage addresses are as shown in Table 1 and are offset in the Flash base address. [Table 1]

[0064] In conclusion, the present invention performs current sampling through the PCB Rogowski coil 10, adopts non-contact detection, does not affect the existing discharge circuit, has high safety, fast response speed, and can reach a saturation current of several thousand amperes, and has a simple PCB coil structure, stable process, high consistency, and low cost. Meanwhile, the signal amplifier circuit 12 and the integration and voltage holding circuit 13 can stably and accurately measure the peak current every time, and can monitor the treatment effect in real time during treatment with the vascular calcification treatment equipment.

[0065] The embodiment of the present invention also provides a high voltage generator. FIG. 5 shows a structural structure of a high voltage generator according to one embodiment of the present invention. As shown in FIG. 5, the high voltage generator 200 includes a power supply module 110, a boost circuit 120, and a current peak detection device 100 according to any of the above embodiments. Here, the power supply module 110 and the boost circuit 120 are connected to a microcontroller 14 in the current peak detection device 100. The microcontroller 14 in the current peak detection device 100 is connected to the boost circuit 120. The PCB coil in the current peak detection device 100 is provided at the output terminal of the boost circuit 120 and is used to induce a current signal in the measurement target line at the output terminal. For simplicity, the signal processing module 20 in FIG. 5 includes other modules, circuits and elements except the PCB Rogowski coil 10, the microcontroller 14 and the memory module 15 in the above embodiments.

[0066] Specifically, the power supply module 110 supplies power to the boost circuit 120 and the microcontroller 14. The boost circuit 120 is used to generate a high voltage required for treatment, and the power supply voltage can be increased to a high voltage as required via the boost circuit 120.

[0067] An embodiment of the present invention also provides a vascular calcification treatment equipment. Please refer to Fig. 6. Fig. 6 shows a schematic structure of a vascular calcification treatment equipment according to one embodiment of the present invention. As shown in Fig. 6, the vascular calcification treatment equipment includes a high voltage generator of the above embodiment, a connector 300, and a consumable electrode 400. Here, the output terminal of the high voltage generator is connected to the consumable electrode 400 via the connector 300 to form a high voltage discharge circuit.

[0068] <Industrial Applicability> When using a vascular calcification treatment device to treat calcified tissue in a blood vessel, the specific process is to send an inner tube with several consumable electrodes 400 distributed at the distal end and a balloon coated on the outside of the inner tube together through a guide wire to the calcified tissue in the blood vessel that needs to be treated, and fill the balloon with liquid (conductive liquid such as saline solution). After filling with liquid is completed, a high voltage generator is energized, and the high voltage generator generates a high voltage discharge circuit, which generates shock waves in the consumable electrodes 400, which breaks up the calcified furnace attached to the blood vessel wall.

[0069] The above is merely a preferred embodiment of the present invention, and is not intended to limit the present invention in any manner. The present invention has been disclosed as above in a preferred embodiment, but the present invention is not limited thereby. Any person familiar with the present technology can use the above disclosed technical content to make equivalent modifications or modify the above into an equivalent embodiment of equivalent variation, without departing from the technical scope of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the gist of the invention, without departing from the technical proposal of the present invention, are within the scope of the technical proposal of the present invention.

Claims

1. A current peak detection device including a PCB Rogowski coil, a sampling resistor, a signal amplifier circuit, an integration and voltage holding circuit, and a microcontroller, The PCB Rogowski coil induces a current signal in the line to be measured and obtains a corresponding induced electromotive force; the sampling resistor is connected to the PCB Rogowski coil to obtain a sampling voltage corresponding to the induced electromotive force; the signal amplifier circuit is connected to the sampling resistor and amplifies and outputs the sampling voltage; The integration and voltage holding circuit is connected to the signal amplifier circuit, integrates the amplified sampled voltage, obtains a voltage signal proportional to the current signal in the line to be measured, and holds a maximum value of the voltage signal; the microcontroller is connected to the integration and voltage holding circuit, performs ADC sampling on the maximum value of the voltage signal, and obtains a current peak of the current signal in the line to be measured based on the ADC sampling data and preset current location data, and further performs digital filtering on the ADC sampling data to filter out abnormal data in a plurality of the ADC sampling data, and obtains an average value of the filtered plurality of the ADC sampling data to obtain a current peak of the current signal in the line to be measured based on the current location data; Here, the abnormal data includes a minimum value and / or a maximum value of the plurality of ADC sampling data. A current peak detection device comprising:

2. the PCB Rogowski coil includes a first coil portion and a second coil portion; The first coil portion and the second coil portion constitute an entire annular coil, The first coil portion and the second coil portion are removably connected, Here, the first coil portion and the second coil portion have conductors arranged in upper and lower layers, respectively, 2. The current peak detection device according to claim 1, wherein the corresponding conductor wire forms a wire turn by via connection and has a loop wire installed thereon.

3. the integrating and voltage holding circuit includes an RC integrating circuit and a first diode; the RC integrator circuit includes a first resistor and a first capacitor; 2. The current peak detection device according to claim 1, wherein the first diode and the first resistor are connected in series between the output terminal of the signal amplifier circuit and the input terminal of the microcontroller, and the first capacitor is connected between the input terminal of the microcontroller and ground.

4. The current peak detection device as described in claim 1, further comprising a filter circuit arranged between the PCB Rogowski coil and the signal amplification circuit.

5. The current peak detection device as described in Claim 4, characterized in that the filter circuit includes a common mode inductance arranged between the output terminal of the PCB Rogowski coil and the sampling resistor.

6. 5. The current peak detection device according to claim 4, wherein the filter circuit includes a first magnetic bead and a second magnetic bead connected in parallel between the sampling resistor and the signal amplifier circuit.

7. A current peak detection device including a PCB Rogowski coil, a sampling resistor, a signal amplifier circuit, an integration and voltage holding circuit, a filter circuit provided between the PCB Rogowski coil and the signal amplifier circuit, and a microcontroller, The PCB Rogowski coil induces a current signal in the line to be measured and obtains a corresponding induced electromotive force; the sampling resistor is connected to the PCB Rogowski coil to obtain a sampling voltage corresponding to the induced electromotive force; the signal amplifier circuit is connected to the sampling resistor and amplifies and outputs the sampling voltage; The integration and voltage holding circuit is connected to the signal amplifier circuit, integrates the amplified sampled voltage, obtains a voltage signal proportional to the current signal in the line to be measured, and holds a maximum value of the voltage signal; The microcontroller is connected to the integration and voltage holding circuit, and performs ADC sampling on the maximum value of the voltage signal, and obtains a current peak of the current signal in the line to be measured based on the ADC sampling data and preset current location data; The filter circuit includes a common mode inductance disposed between an output terminal of the PCB Rogowski coil and the sampling resistor, or includes a first magnetic bead and a second magnetic bead connected in parallel between the sampling resistor and the signal amplifier circuit. A current peak detection device comprising:

8. the filter circuit includes a common mode filter capacitance and a differential mode filter capacitance; 5. The current peak detection device according to claim 4, wherein the common mode filter capacitance and the differential mode filter capacitance are provided between the sampling resistor and the signal amplifier circuit.

9. 1. A high voltage generator comprising: A power supply module, a boost circuit, and a current peak detection device according to any one of claims 1 to 8, Wherein, the power supply module is connected to the boost circuit and the microcontroller in the current peak detection device; The microcontroller in the current peak detection device is connected to the boost circuit, A high voltage generator, characterized in that the PCB Rogowski coil in the current peak detection device is provided at the output terminal of the boost circuit and induces a current signal in the line to be measured at the output terminal.

10. A vascular calcification treatment device, comprising:

10. A high voltage generator, connector and consumable electrode according to claim 9, 11. The vascular calcification treatment equipment, wherein an output terminal of the high voltage generator is connected to the consumable electrode via the connector to form a high voltage discharge circuit.

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