CN212875756U

CN212875756U - Parallel resonant circuit capable of tuning resonant frequency

Info

Publication number: CN212875756U
Application number: CN202021331728.XU
Authority: CN
Inventors: 黄松
Original assignee: Wuhan Bluebaoshi Medical Equipment Co ltd
Current assignee: Wuhan Bluebaoshi Medical Equipment Co ltd
Priority date: 2020-07-09
Filing date: 2020-07-09
Publication date: 2021-04-02
Anticipated expiration: 2030-07-09

Abstract

The utility model discloses a parallel resonance circuit of tunable frequency of shaking, including the standard capacitance circuit that relay switch Ki of a plurality of polyphone standard electric capacity Ci constitutes, standard electric capacity Ci's electric capacity is 2ⁱF, connecting the standard capacitor circuits in parallel to form a capacitor analog circuit; the inductor also comprises a standard inductor circuit consisting of a plurality of relay switches Gj connected with a standard inductor Lj in parallel, wherein the inductive reactance of the standard inductor Lj is 2^jH, connecting the standard inductance circuit in series to form an inductance analog circuit; the inductance analog circuit is connected with the capacitance analog circuit in parallel, and the overcurrent protection relay SW, the current acquisition resistor Rlimt and the resistorThe inductance analog circuit is connected in series, and the digital circuit, the nixie tube, the relay switches and the LED indicator lamp provide power; the digital circuit comprises BCD decoders in signal connection with the relay switches, the input ends of the BCD decoders are in signal connection with a counter, the counter is further in signal connection with nixie tubes and keys, and the nixie tubes are used for displaying decimal numbers input by the keys in a parallel mode into decimal capacitance Cout and inductive reactance Lout.

Description

Parallel resonant circuit capable of tuning resonant frequency

Technical Field

The patent of the utility model relates to a tunable frequency's parallel resonance circuit.

Background

The high-frequency generator is an electrosurgical instrument for treating living tissue, and includes a resonant circuit that excites a high-frequency signal based on electric power, and the resonant frequency is set based on the amount of frequency variation of the high-frequency signal caused by load variation of the living tissue with which the electrosurgical instrument is in contact. However, in the prior art, several different inductors and capacitors are prepared according to experimental data to adjust the resonant frequency, but the adjustment of the inductors and capacitors cannot be changed continuously, and the resonant frequency can only be adjusted by several values.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a tunable frequency's parallel resonance circuit for through digital circuit drive relay opening and shutting, obtain the inductance of input inductance value, or the electric capacity of input capacitance, reach the sense of adjustment and hold and the electric capacity can continuous change, provide basic scheme for adjusting continuous resonance frequency.

In order to solve the technical problem, the technical scheme of the utility model as follows: a parallel resonance circuit capable of tuning the resonant frequency comprises a nixie tube, keys, an LED lamp, analog capacitor output interfaces SC1, SC2 and an analog inductor, wherein 20 parallel standard capacitor circuits are arranged between the analog circuit output interfaces SC1 and SC2, each standard capacitor circuit is internally provided with a standard capacitor Ci and a relay switch Ki which are connected in series, and the capacitance of the standard capacitor Ci is 2ⁱF, the standard capacitor circuits are connected in parallel into a capacitor analog circuit in sequence from small to large according to the capacitance, wherein i is the serial number of the standard capacitor Li and the relay switch Ki; the switch Sc is connected with the capacitance analog circuit in series, and the power supply VCC supplies power to the capacitance analog circuit, the counting circuit I, the nixie tube I U1 and each relay switch Ki; the first counting circuit comprises a first counter U3 in signal connection with 4 relay switches Ki, the output end of the first counter U3 is in signal connection with a first nixie tube U1, the first counter U3 is further in signal connection with a key, 6 nixie tubes U1 are arranged, a plurality of first nixie tubes U1 are used for displaying decimal numbers input by the key as a decimal capacitor Cout in parallel, the first counter U3 is used for converting the decimal numbers into four-digit binary signals, and the capacitance analog circuit is further connected with an inductor in parallelAn analog circuit.

Preferably, the inductance analog circuit comprises 20 standard inductors Lj connected in series, each standard resistor Lj is connected in parallel with a relay switch Gj, and the inductance of each standard inductor Lj is 2^jH, the standard inductors are sequentially connected in series from small to large according to inductive reactance, wherein j is the serial number of the standard inductor Lj and the relay switch Gj; change-over switch S_LThe overcurrent protection relay SW and the current collection resistor Rlimt are connected with the inductance analog circuit in series, and the power supply VCC supplies power to the inductance analog circuit, the counting circuit II, the nixie tube II U4, the relay switches Gj and the LED indicator lamp; the second counting circuit comprises a second counter U5 in signal connection with 4 relay switches Gi, the output end of the second counter U5 is in signal connection with a second nixie tube U4, the second counter U5 is also in signal connection with a key, 6 nixie tubes U4 are arranged, a plurality of nixie tubes U4 are used for displaying decimal numbers input by the key as decimal inductive reactance Lout in parallel, and the second counter U5 is used for converting the decimal numbers into four-digit binary signals.

Further, the current collection resistor Rlimt is connected in parallel with the current collection circuit, and the current collection circuit is in signal connection with the overcurrent protection relay SW and is used for driving the overcurrent protection relay SW to cut off the inductance analog circuit when the collected current exceeds a threshold value.

Further, the current collecting resistor Rlimt is connected with an LED lamp through a signal, and the LED indicating lamp is used for indicating system faults.

Furthermore, the first counter U3 is a 4-digit decimal synchronous reversible counter CD4510, and the output end of the first counter U3 is in signal connection with the input end of the electromagnetic coil of each relay switch Ki through 4 resistors and Darlington tubes.

The utility model relates to a possess following functional characteristics: the capacitance Cout output range of the capacitance analog circuit is 1-999KF, the step is 1F, the capacitance Lout output range of the inductance analog circuit is 1-999KH, and the step is 1H.

Drawings

Fig. 1 is a schematic view of the assembly of the nixie tube, the key and the LED lamp of the parallel resonant circuit with tunable resonant frequency of the present invention;

fig. 2 is a functional block diagram of the present invention;

fig. 3 is a schematic diagram of a capacitor and inductor analog circuit according to the present invention;

fig. 4 is a schematic diagram of the driving of the keys, the counter and the relay according to the present invention;

FIG. 5 is a schematic diagram of the binary-to-BCD code and nixie tube circuit of the present invention;

fig. 6 is a schematic diagram of the driving of the keys, the counter and the relay according to the present invention;

fig. 7 is a schematic diagram of the current collecting circuit of the present invention.

Detailed Description

Specific embodiments of the present invention will be described in detail below, and it should be noted that the embodiments described herein are only for illustration and are not intended to limit the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that these specific details need not be employed to practice the present invention. In other instances, well-known circuits, materials, or methods have not been described in detail in order to avoid obscuring the present invention.

As shown in figure 1, the parallel resonance circuit capable of tuning the resonant frequency comprises 6 nixie tubes I U1, 6 nixie tubes II U4, 12 keys 3, 1 LED lamp D21, analog circuit output interfaces SC1 and SC2, 20 parallel standard capacitor circuits are arranged between the analog resistor output interfaces SC1 and SC2, each standard capacitor circuit is internally provided with a standard capacitor Ci and a relay switch Ki which are connected in series, i is the serial number of the standard capacitor Ci and the relay switch Ki and is arranged from 0 to 20 from small to large, and the capacitance of the ith standard capacitor Ci is 2ⁱOmega, the standard capacitor circuits are connected in parallel into a capacitor analog circuit in sequence from small to large according to the capacitance; the switch Sc is connected with the resistance value analog circuit in series as shown in figure 3, see 1, 2a and 4, a power supply VCC supplies power for the capacitance analog circuit, the counting circuit I, the nixie tube I U1 and each relay switch Ki2, and output interfaces SC1 and SC2 serve as output ends of the digital circuit; the counting circuit comprises a counter U3 in signal connection with each relay switch Ki, see FIG. 4, the counter U3 being synchronized with 4 decimalAn inverse counter CD4510, wherein the output terminals (6, 11, 14, 2) of a counter U3 are respectively connected with the input terminals of the electromagnetic coils of the relay switches (K1, K2, K3, K4) through 4 resistors and Darlington tubes (Q1, Q2, Q3, Q4) in signal connection, the output terminal of each counter U3 is also connected with the input terminal (7, 1, 2, 6) of a BCD decoder U2 in signal connection with the output terminal of each counter U2 in FIG. 5, the output terminals (D0-D6) of each BCD decoder U2 are connected with a nixie tube U1 through 7 resistor signals, the counter U8 is also connected with a key 3 in signal connection, the nixie tube U1 is provided, 6 nixie tubes U1 are freely juxtaposed from the left for displaying the decimal number inputted by the key as a decimal number Coutt, the BCD decoder U2 is used for converting the single decimal number inputted into a four-digit binary number binary signal corresponding to a binary number of a binary signal of 20, 0, 1, 0, the inductance analog circuit is also connected in parallel with an inductance analog circuit, as shown in fig. 6, the inductance analog circuit comprises 20 standard inductors Lj connected in series, each standard resistor Lj is connected in parallel with a relay switch Gj, and the inductance of each standard inductor Lj is 2^jH, sequentially connecting the standard inductors in series from small to large according to inductive reactance, wherein j is the serial number of the standard inductor Lj and the relay switch Gj; change-over switch S_LThe overcurrent protection relay SW and the current collection resistor Rlimt are connected with the inductance analog circuit in series, and the power supply VCC supplies power to the inductance analog circuit, the counting circuit II, the nixie tube II U4, the relay switches Gj and the LED indicator lamp; referring to fig. 5 (only nixie tube U1 and BCD decoder U2 have different symbols), the second counting circuit includes a second counter U5 in signal connection with 4 relay switches Gi, the output end of each second counter U5 is also in signal connection with the input ends (7, 1, 2, 6) of the second BCD decoder U6, the second BCD decoder U6 and the first BCD decoder U2 have the same structure, the output ends (D0-D6) of each second BCD decoder U6 are in signal connection with the second nixie tube U4 through 7 resistors, the second counter U5 is also in signal connection with the key 3, 6 nixie tube U4 are provided, a plurality of nixie tubes U4 are arranged in parallel for displaying the decimal number input by the key as a decimal inductive reactance Lout, and the second counter U5 is used for converting the decimal number into a four-bit binary signal.

The two ends of the current collection resistor Rlimt are electrically connected with the current collection circuit 8 as shown in FIG. 7, the current collection circuit 8 is in signal connection with an LED indicator lamp D21, the LED indicator lamp D21 is used for indicating system faults, and the current collection circuit is in signal connection with the overcurrent protection relay SW and is used for driving the overcurrent protection relay SW to cut off the inductance simulation circuit when the collected current exceeds a threshold value.

Let Q0 … … Q19 be binary signals of the corresponding sequence converted by the BCD decoder I U2 and the BCD decoder II U6, the binary numbers 0 or 1, 0 are invalid, the corresponding relay switch Ki or Gi is closed, 1 is valid, the corresponding relay switch Ki or Gi is opened,

then:

l0 × L0+ Q1 × L1+ Q2 × L2+ Q3 × L3 … + Q19 × L19, and L0 × 2⁰H，L1＝2¹H，L2＝2²H，…L18＝2¹⁸H，L19＝2¹⁹H，

Then:

Lout＝Q0*2⁰+Q1*2¹+Q2*2²+Q3*2³…+Q19*2¹⁹

Cout-Q0-C0 + Q1-C1 + Q2-C2 + Q3-C3 … + Q19-C19, and C0-2⁰F，C1＝2¹F，C2＝2²F，…C18＝2¹⁸F，C19＝2¹⁹F。

Switch S_LAnd Sc is switched, so that the output port can only output the selected capacitance or inductive reactance.

When Cout is required to be set as 243F, the BCD decoder U2 can convert the decimal number 243 into a 20-bit binary signal through the key input 243, and the binary signals are arranged in the following order: q₁₉Q₁₈Q₁₇Q₁₆Q₁₅Q₁₄Q₁₃Q₁₂Q₁₁Q₁₀Q₉Q₈Q₇Q₆Q₅Q₄Q₃Q₂Q₁Q₀Can be expressed as: 00000000000011110011

The actual output CG is:

Cout＝C7+C6+C5+C4+C1+C0

＝Q7*2⁷+Q6*2⁶+Q5*2⁵+Q4*2⁴+Q1*2¹+Q0*2⁰

＝2⁷+2⁶+2⁵+2⁴+2¹+2⁰

＝243F

inputting desired capacitance and inductive reactance as above, and turning on Sc and S simultaneously_LThus, a corresponding parallel resonant circuit is obtained, and a set resonant frequency can be obtained by applying power.

Claims

1. A parallel resonance circuit capable of tuning the resonant frequency comprises a nixie tube, keys, an LED lamp, analog capacitor output interfaces SC1, SC2 and an analog inductor, and is characterized in that 20 parallel standard capacitor circuits are arranged between the analog capacitor output interfaces SC1 and SC2, each standard capacitor circuit is internally provided with a standard capacitor Ci and a relay switch Ki which are connected in series, and the capacitance of the standard capacitor Ci is 2ⁱF, the standard capacitor circuits are connected in parallel into a capacitor analog circuit in sequence from small to large according to the capacitance, wherein i is the serial number of the standard capacitor Li and the relay switch Ki; the switch Sc is connected with the capacitance analog circuit in series, and the power supply VCC supplies power to the capacitance analog circuit, the counting circuit I, the nixie tube I U1 and each relay switch Ki; the first counting circuit comprises a first counter U3 in signal connection with 4 relay switches Ki, the output end of the first counter U3 is in signal connection with a first nixie tube U1, the first counter U3 is further in signal connection with a key, 6 first nixie tubes U1 are arranged, a plurality of first nixie tubes U1 are used for displaying decimal numbers input by the key as a decimal capacitor Cout in parallel, the first counter U3 is used for converting the decimal numbers into four-digit binary signals, and the capacitor analog circuit is further connected with an inductor analog circuit in parallel.

2. The parallel resonant circuit with tunable resonant frequency according to claim 1, wherein the inductance simulation circuit comprises 20 standard inductors Lj connected in series, each standard resistor Lj is connected in parallel with a relay switch Gj, and the inductance of each standard inductor Lj is 2^jH, the standard inductors are sequentially connected in series from small to large according to inductive reactance, wherein j is the serial number of the standard inductor Lj and the relay switch Gj; change-over switch S_LThe overcurrent protection relay SW and the current collection resistor Rlimt are connected with the inductance analog circuit in series, and the power supply VCC supplies power to the inductance analog circuit, the counting circuit II, the nixie tube II U4, the relay switches Gj and the LED indicator lamp; the second counting circuit comprises a second counter U5 in signal connection with 4 relay switches Gi, the output end of the second counter U5 is in signal connection with a second nixie tube U4, the second counter U5 is also in signal connection with a key, 6 nixie tubes U4 are arranged, a plurality of nixie tubes U4 are used for displaying decimal numbers input by the key as decimal inductive reactance Lout in parallel, and the second counter U5 is used for converting the decimal numbers into four-digit binary signals.

3. The parallel resonant circuit with tunable resonant frequency according to claim 2, wherein the current collection resistor Rlimt is connected in parallel with the current collection circuit, and the current collection circuit is connected with the over-current protection relay SW through a signal, and is used for driving the over-current protection relay SW to cut off the inductance analog circuit when the collected current exceeds a threshold value.

4. The parallel resonant circuit capable of tuning the resonant frequency according to claim 3, wherein the current collection resistor Rlimt is connected with an LED lamp through a signal, and an LED indicator lamp is used for indicating a system fault.

5. The parallel resonant circuit with tunable resonant frequency according to claim 1, wherein the counter-U3 is a 4-digit decimal synchronous reversible counter CD4510, and the output terminal of the counter-U3 is in signal connection with the input terminal of the electromagnetic coil of each relay switch Ki through 4 resistors and darlington tubes.