CN212060930U - Palm ultrasonic multistage high-voltage control circuit - Google Patents
Palm ultrasonic multistage high-voltage control circuit Download PDFInfo
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- CN212060930U CN212060930U CN202021088024.4U CN202021088024U CN212060930U CN 212060930 U CN212060930 U CN 212060930U CN 202021088024 U CN202021088024 U CN 202021088024U CN 212060930 U CN212060930 U CN 212060930U
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Abstract
The utility model discloses a multistage high-voltage control circuit of palm supersound, including microcontroller, digital analog converter and high-voltage circuit, microcontroller's output is connected with digital analog converter's input, high-voltage circuit's output is connected with partial pressure feedback resistance circuit, digital analog converter's output and high-voltage circuit's partial pressure feedback resistance circuit are connected. The utility model discloses avoided adopting to arrange multiunit feedback divider resistance and switching circuit, only with a digital-to-analog converter (DAC) and a set of partial pressure feedback resistance circuit just can realize the high-voltage output of multistage difference, not only controllable progression greatly increased has but also reduced the complexity of system design for the PCB overall arrangement of circuit is more convenient, has guaranteed the miniaturization of system.
Description
Technical Field
The utility model relates to an supersound technical field, more specifically say, in particular to multistage high-voltage control circuit of palm supersound.
Background
In an ultrasound diagnostic apparatus, the adjustment of the acoustic power is important for clinical applications, and the more controllable series, the more beneficial it is for diagnosing patients with different physiological characteristics. The adjustment of the acoustic power is mainly to adjust the output of different voltages of the ultrasonic high-voltage power supply. At present, different voltages output by high voltage are mainly adjusted by matching different voltage division feedback resistors and controlling and switching different voltage division feedback resistors to output different high voltages. However, the method is very redundant, if multi-stage high-voltage output is to be realized, multi-stage voltage division feedback resistors and switching circuits need to be arranged, so that a system circuit is very complex, the number of controllable stages is not large, the method is more unsuitable for palm ultrasound, the hardware size is increased, and the power consumption is increased. Therefore, a small and simple handheld ultrasonic multi-stage high-voltage control circuit is highly needed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a multistage high-voltage control circuit of palm supersound to overcome the defect that prior art exists.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the multi-stage high-voltage control circuit of the palm ultrasound comprises a microcontroller, a digital-to-analog converter and a high-voltage circuit, wherein the output end of the microcontroller is connected with the input end of the digital-to-analog converter, the output end of the high-voltage circuit is connected with a voltage division feedback resistance circuit, and the output end of the digital-to-analog converter is connected with the voltage division feedback resistance circuit of the high-voltage circuit.
Further, the microcontroller adopts an ultrasonic special FPGA chip.
Furthermore, the model of the digital-to-analog converter is DAC084S085, a second port of the digital-to-analog converter is connected to one end of a resistor R306, and the other end of the resistor R306 is connected to a capacitor C729 and an output feedback end of the high-voltage circuit.
Further, the high-voltage circuit comprises an LM5575 high-voltage chip U, an inductor L, a resistor R, a capacitor C and a diode D, the voltage division feedback resistance circuit comprises the resistor R, the resistor R and the resistor R, one end of the inductor L IS connected with an SW port of the high-voltage chip U, one end of the capacitor C and a cathode of the diode D, an anode of the diode D IS connected with an IS port of the high-voltage chip U, the other end of the inductor L IS connected with one end of the capacitor C, one end of the resistor R and an OUT port of the high-voltage chip U, the other end of the capacitor C and the other end of the capacitor C are both grounded, the other end of the resistor R IS connected with one end of the resistor R, the FB port of the high-voltage chip U, one end of the capacitor C and one end of the capacitor C, the other end of the resistor R1 is grounded through a resistor R11, and the connection part of the resistor R1 and the resistor R11 is used as an output feedback end of the high-voltage circuit.
Compared with the prior art, the utility model has the advantages of: the utility model discloses avoided adopting to arrange multiunit feedback divider resistance and switching circuit, only with a digital-to-analog converter (DAC) and a set of partial pressure feedback resistance circuit just can realize the high-voltage output of multistage difference, not only controllable progression greatly increased has but also reduced the complexity of system design for the PCB overall arrangement of circuit is more convenient, has guaranteed the miniaturization of system.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of the multi-stage high-voltage control circuit of the palm ultrasound device of the present invention.
Fig. 2 is a circuit diagram of a digital-analog converter in the multi-stage high-voltage control circuit of the palm ultrasound device of the present invention.
Fig. 3 is a circuit diagram of a high-voltage circuit in the multi-stage high-voltage control circuit of the palm ultrasound device of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention can be more clearly and clearly defined.
Referring to fig. 1-3, the utility model provides a multistage high-voltage control circuit of palm supersound, including microcontroller 10, digital analog converter 20 and high-voltage circuit 30, microcontroller 10's output is connected with digital analog converter 20's input, digital analog converter 20's output is connected with high-voltage circuit 30's output feedback end.
In this embodiment, the microcontroller 10 employs an ultrasonic FPGA chip.
In this embodiment, the digital-to-analog converter 20 (also referred to as DAC) is in a model of DAC084S085, a second port of the digital-to-analog converter 20 is connected to one end of a resistor R306, and the other end of the resistor R306 is connected to the capacitor C729 and the output feedback end of the high-voltage circuit 30.
In this embodiment, the high voltage circuit 30 includes an LM5575 high voltage chip U, an inductor L, a resistor R, a capacitor C, and a diode D, the voltage division feedback resistor circuit includes a resistor R, and a resistor R, one end of the inductor L IS connected to the SW port of the high voltage chip U, one end of the capacitor C, and the cathode of the diode D, the anode of the diode D IS connected to the IS port of the high voltage chip U, the other end of the inductor L IS connected to one end of the capacitor C, one end of the resistor R, and the OUT port of the high voltage chip U, the other end of the capacitor C and the other end of the capacitor C are both grounded, the other end of the resistor R IS connected to one end of the resistor R, the FB port of the high voltage chip U, one end of the capacitor C, and one end of the, the other end of the resistor R1 is grounded through a resistor R11, and the junction of the resistor R1 and the resistor R11 is used as the output feedback end of the high-voltage circuit 30.
The utility model discloses a theory of operation does: the microcontroller 10 writes corresponding data into a digital-to-analog converter 20(DAC) through the SPI interface according to the set sound power value, the DAC converts the digital signal into an analog signal, and the analog signal is connected to the output feedback terminal of the high-voltage circuit 30, because almost all the outputs of the high-voltage circuit are affected by the high-voltage output feedback terminal, different DAC output values will be different high-voltage values output by the high-voltage hardware circuit, thereby implementing the multi-stage control of the high-voltage circuit, and the specific implementation formula is as follows:
Vout＝(VFB-VDAC)*(R10+R1+R11)/R1；
wherein, VFBIs determined by a high voltage chip U5 and is a fixed value VDACThe output value is converted by DAC, that is, the output values of different DACs are different high voltage values output by high voltage hardware circuit, so as to realize multi-stage control of high voltage circuit.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, various changes and modifications can be made by the owner within the scope of the appended claims, and the protection scope of the present invention should not be exceeded by the claims.
Claims (4)
1. The utility model provides a multistage high-voltage control circuit of palm supersound which characterized in that: the voltage divider comprises a microcontroller, a digital-to-analog converter and a high-voltage circuit, wherein the output end of the microcontroller is connected with the input end of the digital-to-analog converter, the output end of the high-voltage circuit is connected with a voltage dividing feedback resistance circuit, and the output end of the digital-to-analog converter is connected with the voltage dividing feedback resistance circuit of the high-voltage circuit.
2. The palm-ultrasonic multistage high-voltage control circuit according to claim 1, characterized in that: the microcontroller adopts an ultrasonic special FPGA chip.
3. The palm-ultrasonic multistage high-voltage control circuit according to claim 1, characterized in that: the model of the digital-to-analog converter is DAC084S085, a second port of the digital-to-analog converter is connected with one end of a resistor R306, and the other end of the resistor R306 is connected with a capacitor C729 and an output feedback end of a high-voltage circuit.
4. The palm-ultrasonic multistage high-voltage control circuit according to claim 1, characterized in that: the high-voltage circuit comprises an LM5575 high-voltage chip U, an inductor L, a resistor R, a capacitor C and a diode D, the voltage division feedback resistance circuit comprises the resistor R, the resistor R and the resistor R, one end of the inductor L IS connected with a SW port of the high-voltage chip U, one end of the capacitor C and a cathode of the diode D, an anode of the diode D IS connected with an IS port of the high-voltage chip U, the other end of the inductor L IS connected with one end of the capacitor C, one end of the resistor R and an OUT port of the high-voltage chip U, the other end of the capacitor C and the other end of the capacitor C are both grounded, the other end of the resistor R IS connected with one end of the resistor R, an FB port of the high-voltage chip U, one end of the capacitor C and one end of the, the other end of the resistor R1 is grounded through a resistor R11, and the connection part of the resistor R1 and the resistor R11 is used as an output feedback end of the high-voltage circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021088024.4U CN212060930U (en) | 2020-06-14 | 2020-06-14 | Palm ultrasonic multistage high-voltage control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021088024.4U CN212060930U (en) | 2020-06-14 | 2020-06-14 | Palm ultrasonic multistage high-voltage control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212060930U true CN212060930U (en) | 2020-12-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021088024.4U Active CN212060930U (en) | 2020-06-14 | 2020-06-14 | Palm ultrasonic multistage high-voltage control circuit |
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| CN (1) | CN212060930U (en) |
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2020
- 2020-06-14 CN CN202021088024.4U patent/CN212060930U/en active Active
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