CN215195043U - Eight-source phase control device with isolation and radio frequency beauty instrument - Google Patents
Eight-source phase control device with isolation and radio frequency beauty instrument Download PDFInfo
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- CN215195043U CN215195043U CN202120884959.1U CN202120884959U CN215195043U CN 215195043 U CN215195043 U CN 215195043U CN 202120884959 U CN202120884959 U CN 202120884959U CN 215195043 U CN215195043 U CN 215195043U
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Abstract
The utility model relates to an eight-source phase control device with isolation and a radio frequency beauty instrument realized by the eight-source phase control device, wherein the eight-source phase control device comprises a signal generating circuit, a shaping circuit, a first modulation circuit, a second modulation circuit, a fourth third modulation circuit and a fourth isolation output circuit which are electrically connected in sequence, and the second modulation circuit is used for outputting 8-channel displacement signals; the input ports of the four paths of third modulation circuits are sequentially connected with 4-channel signals in 8-channel shift signals output by the second modulation circuit in a staggered mode to generate 4 square wave signals with adjacent phase difference of pi/4, and one path of the 8-channel shift signals output by the second modulation circuit is connected in an idle mode; the four isolated output circuits respectively correspond to one third modulation circuit. The utility model discloses can reach 8 phase output that the phase difference is 45, the frequency can reach 1MHz frequency, has reduced the dependence to main control chip, just can reach the purpose of shifting the phase through common logic device, and the frequency precision is high.
Description
Technical Field
The utility model relates to a control technical field mutually, concretely relates to take eight source accuse devices of high frequency output of keeping apart and adopt the radio frequency beauty instrument that this eight source accuse device realized.
Background
The phase control technology is widely applied to military and civil use, and is mainly commonly used in a three-phase electric control technology, a phase control radar and the like. The three-phase electric control mainly controls the phase of voltage and current to reach the electricity utilization standard, the phase control radar is a technology for controlling the radar wave phase, and the difference between the three-phase electric control and the phase control is control electricity and control wave. The traditional three-phase electric control technology controls the phase difference of complete sine wave alternating current to be 120 degrees.
The common market of radio frequency beauty instruments and equipment is monopole radio frequency and dipole radio frequency, which are single-phase output and double-phase output with a phase difference of 180 degrees, and the output waveform is mostly a malformed sine wave or a pulse wave, which cannot meet the actual demand. A few radio frequency beauty instruments and equipment which can achieve 8-source phase control technology in the market generally adopt a main control chip to achieve the purpose of phase shifting through program control, have higher performance requirements on the main control chip, and are easily restricted by chip manufacturers in the face of the current intense chip competition. Meanwhile, the frequency of the driving signal is easy to deviate from a normal preset value due to the time difference of the program control clock, so that the precision of the output frequency is low.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the technical problem who exists among the prior art, provide an eight source accuse devices of high frequency output of area isolation and adopt the radio frequency beauty instrument that this eight source accuse device realized, aim at reaching the purpose of moving the phase through common logic device to realize high frequency, the waveform output of high accuracy.
The utility model provides an above-mentioned technical problem's technical scheme as follows:
in one aspect, the utility model provides an eight source accuse devices of area isolation, include:
a signal generating circuit for generating a high-frequency sine wave signal;
the input end of the shaping circuit is connected with the signal generating circuit and is used for shaping the sine wave signal output by the signal generating circuit and outputting a square wave signal;
the input end of the first modulation circuit is connected with the output end of the shaping circuit and is used for outputting a three-bit binary signal according to the square wave signal output by the shaping circuit;
the input end of the second modulation circuit is connected with the output end of the first modulation circuit and is used for outputting 8-channel shift signals according to the three-bit binary signals output by the first modulation circuit;
each path of third modulation circuit comprises four paths of input ports and one path of output port; the input ports of the four paths of third modulation circuits are sequentially connected with 4-channel signals in 8-channel shift signals output by the second modulation circuit in a staggered mode to generate 4 square wave signals with adjacent phase difference of pi/4, and one path of the 8-channel shift signals output by the second modulation circuit is connected in an idle mode;
and the four isolated output circuits respectively correspond to one third modulation circuit, and the input end of each isolated output circuit is connected with the output end of the corresponding third modulation circuit.
Further, the signal generating circuit is a crystal oscillator circuit and is configured to output a 8MHZ sine wave signal.
Further, the shaping circuit is realized by a nand gate circuit and is used for outputting 8MHZ square wave signals.
Furthermore, the first modulation circuit is realized by adopting a 74HC161 chip, the output end of the shaping circuit is connected with a clock signal pin of the 74HC161 chip, and three-bit binary numbers are output from pins Q0-Q2 of the 74HC161 chip at the rising edge of square waves.
Furthermore, the second modulation circuit is realized by adopting a three-eight decoder, and three-bit binary input is converted into 8-channel shift signals Y0-Y7 through the three-eight decoder to be output.
Furthermore, Y0 of the 8-channel shift signals Y0-Y7 output by the second modulation circuit is connected in the air.
Further, the third modulation circuit is implemented by an 8-input nand/and chip with the model 74HC 4068.
Furthermore, the isolation output circuit is realized by adopting a Si8234 grid electrode driving and isolating device, and a PWM (pulse width modulation) functional pin of the isolation output circuit is connected with the output end of the third modulation circuit.
On the other hand, the utility model also provides a radio frequency beauty instrument, this beauty instrument adopts foretell eight source accuse devices of taking isolation to carry out output control.
The utility model has the advantages that:
the utility model discloses an output circuit is kept apart in four ways can produce 8 adjacent phase differences and be 1 MHZ's of pi 4 square signal, and traditional bridge type oscillation circuit that forms through MOS pipe and push-pull transformer combination produces the alternating current of high-frequency, reaches the high frequency alternating current output of different phases through phase shift circuit control, and the voltage waveform is the triangle wave, and the phase difference is 45. The utility model discloses an output circuit is kept apart in four ways can produce 8 adjacent phase differences and be 1 MHZ's of pi 4 square signal, through MOS pipe and push-pull transformer combination traditional bridge type oscillation circuit control direct current that forms reach the output of 8 different phase and voltage waveform of high-frequency for the alternating current of triangle wave. The controllability of direct current is stronger than that of traditional alternating current, and the output of high frequency alternating current with different amplitudes and different frequencies can be met by changing the size of power supply voltage, crystal oscillation parameters of the phase-shift circuit and corresponding components.
The utility model discloses can reach 8 phase output that the phase difference is 45, the frequency can reach 1MHz frequency. The utility model discloses an output circuit is kept apart in four ways can produce 8 adjacent phase differences and be 1 MHZ's of pi 4 square signal, through MOS pipe and the traditional bridge type oscillation circuit that push-pull transformer combination formed, the voltage waveform of output is the triangle waveform of exchanging, is different from malformation sine wave or pulse wave on the market. The utility model discloses reduced the dependence to main control chip, just can reach the purpose of shifting the phase through common logic device. The utility model discloses a crystal oscillator provides the clock source, is different from the skew normal preset value of drive signal frequency that the time difference of program control clock caused, the utility model discloses a frequency precision of phase-shifting circuit output drive MOS pipe is high.
Drawings
Fig. 1 is a circuit logic block diagram of an eight-source phase control device according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of an eight-source phase control device according to an embodiment of the present invention;
fig. 3 is a circuit logic timing diagram of an eight-source phase control apparatus according to an embodiment of the present invention.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1 and 2, an embodiment of the present invention provides an eight-source phase control device with isolation, including:
a signal generating circuit for generating a high-frequency sine wave signal; in this embodiment, the signal generating circuit is a crystal oscillator circuit, and is configured to output a 8MHZ sine wave signal.
The input end of the shaping circuit is connected with the signal generating circuit and is used for shaping the sine wave signal output by the signal generating circuit and outputting a square wave signal; the shaping circuit in this embodiment is implemented by a nand gate circuit, and is configured to output a square wave signal of 8 MHZ.
The input end of the first modulation circuit is connected with the output end of the shaping circuit and is used for outputting a three-bit binary signal according to the square wave signal output by the shaping circuit; in this embodiment, the first modulation circuit is implemented by using a 74HC161 chip, an output terminal of the shaping circuit is connected to a clock signal pin of the 74HC161 chip, and a three-bit binary number is output from pins Q0 to Q2 of the 74HC161 chip on a rising edge of a square wave.
The input end of the second modulation circuit is connected with the output end of the first modulation circuit and is used for outputting 8-channel shift signals according to the three-bit binary signals output by the first modulation circuit; in this embodiment, the second modulation circuit is implemented by a three-eight decoder with a model 74HC138, and three-bit binary input is converted into 8-channel shift signals Y0 to Y7 by the three-eight decoder. Y0 of the 8-channel shift signals Y0-Y7 output by the second modulation circuit is connected in the air.
Each path of third modulation circuit comprises four paths of input ports and one path of output port; the input ports of the four paths of third modulation circuits are sequentially connected with 4-channel signals in 8-channel shift signals output by the second modulation circuit in a staggered mode to generate 4 square wave signals with adjacent phase difference of pi/4, and one path of the 8-channel shift signals output by the second modulation circuit is connected in an idle mode; in this embodiment, the third modulation circuit is implemented by using an 8-input nand/and chip with a model number of 74HC 4068. 4 square wave signals of 1MHz with the adjacent phase difference of pi/4 are generated by 4 74HC4068, and the duration proportion of high and low levels in one period is 1: 1.
And the four isolated output circuits respectively correspond to one third modulation circuit, and the input end of each isolated output circuit is connected with the output end of the corresponding third modulation circuit. The isolation output circuit is realized by adopting a Si8234 grid electrode driving and isolating device, and a PWM (pulse width modulation) functional pin of the isolation output circuit is connected with the output end of the third modulation circuit.
The logic timing of the circuit of the eight-source control device is shown in fig. 3.
The utility model discloses an output circuit is kept apart in four ways can produce 8 adjacent phase differences and be 1 MHZ's of pi 4 square signal, and traditional bridge type oscillation circuit that forms through MOS pipe and push-pull transformer combination produces the alternating current of high-frequency, reaches the high frequency alternating current output of different phases through phase shift circuit control, and the voltage waveform is the triangle wave, and the phase difference is 45. The output of 8 kinds of alternating current with different phases and triangular wave voltage waveform at high frequency is achieved by controlling the direct current. The controllability of direct current is stronger than that of traditional alternating current, and the output of high frequency alternating current with different amplitudes and different frequencies can be met by changing the size of power supply voltage, crystal oscillation parameters of the phase-shift circuit and corresponding components.
The common market of radio frequency beauty instruments and equipment is monopole radio frequency and dipole radio frequency, which are respectively single-phase output and double-phase output with 180-degree phase difference. The utility model discloses can reach 8 phase output that the phase difference is 45, the frequency can reach 1MHz frequency. The output voltage waveform is an alternating-current triangular waveform, which is different from a malformed sine wave or a pulse wave on the market. Can reach 8 source accuse technique universal adoption main control chip and reach the purpose of moving the phase through program control on the radio frequency beauty instrument and the equipment market, to main control chip's performance requirement than higher, in the face of fierce chip competition at present, receive the restriction of chip producer easily, and the utility model discloses reduced the dependence to main control chip, just can reach the purpose of moving the phase through common logic device. The utility model adopts the crystal oscillator to provide the clock source, which is different from the deviation of the driving signal frequency from the normal preset value caused by the time difference of the program control clock, the four-way isolation output circuit of the utility model can generate 8 square wave signals with the adjacent phase difference of pi/4 and the frequency precision is extremely high,
the above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (9)
1. The utility model provides an eight source accuse device of area isolation which characterized in that includes:
a signal generating circuit for generating a high-frequency sine wave signal;
the input end of the shaping circuit is connected with the signal generating circuit and is used for shaping the sine wave signal output by the signal generating circuit and outputting a square wave signal;
the input end of the first modulation circuit is connected with the output end of the shaping circuit and is used for outputting a three-bit binary signal according to the square wave signal output by the shaping circuit;
the input end of the second modulation circuit is connected with the output end of the first modulation circuit and is used for outputting 8-channel shift signals according to the three-bit binary signals output by the first modulation circuit;
each path of third modulation circuit comprises four paths of input ports and one path of output port; the input ports of the four paths of third modulation circuits are sequentially connected with 4-channel signals in 8-channel shift signals output by the second modulation circuit in a staggered mode to generate 4 square wave signals with adjacent phase difference of pi/4, and one path of the 8-channel shift signals output by the second modulation circuit is connected in an idle mode;
and the four isolated output circuits respectively correspond to one third modulation circuit, and the input end of each isolated output circuit is connected with the output end of the corresponding third modulation circuit.
2. The isolated eight-source phase control device according to claim 1, wherein the signal generating circuit is a crystal oscillator circuit for outputting an 8MHZ sine wave signal.
3. The isolated eight-source phase-control device according to claim 1, wherein the shaping circuit is implemented by a nand gate circuit for outputting 8MHZ square wave signals.
4. The isolated eight-source phase control device according to claim 1, wherein the first modulation circuit is implemented by a chip 74HC161, an output terminal of the shaping circuit is connected to a clock signal pin of the chip 74HC161, and a three-bit binary number is output from pins Q0 to Q2 of the chip 74HC161 at a rising edge of a square wave.
5. The isolated eight-source phase control device according to claim 1, wherein the second modulation circuit is implemented by a three-eight decoder, and the three-bit binary input is converted into 8-channel shift signals Y0-Y7 for output through the three-eight decoder.
6. The isolated eight-source phase control device according to claim 5, wherein Y0 of the 8-channel shift signals Y0-Y7 outputted by the second modulation circuit is connected in the air.
7. The isolated eight-source phase control device according to claim 1, wherein the third modulation circuit is implemented by an 8-input nand/and gate chip of type 74HC 4068.
8. The eight-source phase control device with isolation according to claim 1, wherein the isolation output circuit is implemented by using a Si8234 gate driver and isolator, and a PWM functional pin of the isolation output circuit is connected to an output terminal of the third modulation circuit.
9. A radio frequency cosmetic apparatus characterized in that the cosmetic apparatus is output controlled by the isolated eight-source control device according to any one of claims 1 to 8.
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| CN202120884959.1U CN215195043U (en) | 2021-04-27 | 2021-04-27 | Eight-source phase control device with isolation and radio frequency beauty instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113082524A (en) * | 2021-04-27 | 2021-07-09 | 武汉好维来科技有限公司 | Eight-source phase control device with isolation and radio frequency beauty instrument |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113082524A (en) * | 2021-04-27 | 2021-07-09 | 武汉好维来科技有限公司 | Eight-source phase control device with isolation and radio frequency beauty instrument |
| CN113082524B (en) * | 2021-04-27 | 2024-08-16 | 武汉好维来科技有限公司 | Eight-source phase control device with isolation function and radio frequency beauty instrument |
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