CN210252992U - Ultrasonic emission drive circuit - Google Patents
Ultrasonic emission drive circuit Download PDFInfo
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- CN210252992U CN210252992U CN201920916483.8U CN201920916483U CN210252992U CN 210252992 U CN210252992 U CN 210252992U CN 201920916483 U CN201920916483 U CN 201920916483U CN 210252992 U CN210252992 U CN 210252992U
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Abstract
The utility model discloses an ultrasonic emission driving circuit, which comprises an isolation circuit for driving pulse signals, a field effect transistor for driving an ultrasonic transducer and a driving circuit for driving the field effect transistor, wherein the isolation circuit is connected with the field effect transistor through the driving circuit; the driving pulse signal is input from the input end of the isolation circuit, and the output end of the isolation circuit is connected with the input end of the driving circuit. The utility model applies negative high voltage in the driving work of the ultrasonic transmitting device, and can realize multi-path driving simultaneously by means of a plurality of input and output ends of the isolation circuit and the driving circuit; the high-voltage resistance characteristic of the N-channel field effect transistor is fully utilized, and the N-channel field effect transistor is used as a core component of ultrasonic driving, so that the emission intensity of ultrasonic is improved; meanwhile, the circuit has fewer components, so that the reliability is higher, and the field effect transistor for driving the negative high voltage by using the low-voltage pulse can be realized by adopting the isolation circuit.
Description
Technical Field
The utility model relates to an ultrasonic emission technical field, concretely relates to ultrasonic emission drive circuit.
Background
Ultrasonic wave is a sound wave with frequency higher than 20000Hz, and is widely applied to the work of distance measurement, speed measurement, cleaning, welding, stone breaking, sterilization and disinfection and the like due to the excellent properties of good directivity, strong penetration capability, easy acquisition of concentrated sound energy, long propagation distance in water and the like. The method has a plurality of applications in medicine, military, industry and agriculture. Ultrasound is known for its lower frequency limit being greater than the upper human hearing limit, and scientists refer to the number of vibrations per second as the frequency of sound, which is reported in hertz (Hz). The frequency of sound waves that can be heard by our human ear is 20Hz-20000 Hz. Therefore, we refer to sound waves with frequencies above 20000Hz as "ultrasound waves".
An ultrasonic generator is a device for generating ultrasonic waves, and the ultrasonic generator is also called an ultrasonic driving power supply, an electronic box and an ultrasonic controller and is an important component of a high-power ultrasonic system. The ultrasonic generator is used for converting commercial power into a high-frequency alternating current signal matched with the ultrasonic transducer and driving the ultrasonic transducer to work. The high-power ultrasonic power supply generally adopts a circuit form of a switching power supply in view of conversion efficiency. The ultrasonic power supply is divided into a self-excited power supply and a separate-excited power supply, the self-excited power supply is called an ultrasonic simulation power supply, and the separate-excited power supply is called an ultrasonic generator. The ultrasonic generator adopts a world-leading independent-excitation type oscillating circuit structure, and the output power is increased by more than 10% compared with a self-excitation type oscillating circuit structure. The ultrasonic amplifying circuit adopts a linear amplifying circuit and a switching power supply circuit. The switching power supply circuit has the advantage of high conversion efficiency, so that the high-power ultrasonic power supply adopts the form. The advantage of a linear power supply circuit is that circuit matching is not strictly required, allowing continuous and rapid changes in operating frequency.
In the switching power supply circuit type ultrasonic amplifying circuit, a higher voltage is often required for driving, and generally, there are two driving methods, one is driving by using a positive high voltage, and the other is driving by using a negative high voltage. However, in the existing ultrasonic emission driving circuit, on the premise of improving the emission intensity of the ultrasonic, the circuit structure becomes relatively complex, so that the reliability of the circuit is reduced to a certain extent, and therefore, the ultrasonic emission driving circuit is provided.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve lies in: on the premise of improving the ultrasonic emission intensity, the structure complexity of the ultrasonic emission driving circuit is reduced as much as possible, and the ultrasonic emission driving circuit is provided.
The utility model solves the technical problems by the following technical proposal, the utility model comprises an isolation circuit for driving pulse signals, a field effect transistor for driving an ultrasonic transducer and a driving circuit for driving the field effect transistor, wherein the isolation circuit is connected with the field effect transistor through the driving circuit, and the field effect transistor with negative high voltage can be driven by low voltage pulse due to the adoption of the isolation circuit;
the driving pulse signal is input from the input end of the isolation circuit, and the output end of the isolation circuit is connected with the input end of the driving circuit;
the output end of the driving circuit is connected with the G (grid) electrode of the field effect tube, the S (source) electrode of the field effect tube is connected with the negative high-voltage power supply terminal, and the D (drain) electrode of the field effect tube is connected with the ultrasonic transducer;
the field effect tube is an N-channel field effect tube which has good high-voltage resistance, and is used as a core component of ultrasonic drive, so that the ultrasonic emission intensity is improved, and the reliability is higher because of fewer components in the circuit.
Preferably, a power supply end of the driving circuit is connected to a first positive low-voltage power supply terminal, a first power supply end of the isolation circuit is connected to a third positive low-voltage power supply terminal, and a second power supply end of the isolation circuit is connected to a second positive low-voltage power supply terminal.
Preferably, the voltage value of the first positive low voltage power supply terminal is smaller than the voltage value of the second positive low voltage power supply terminal.
Preferably, the second ground terminal of the isolation circuit is connected in parallel with the ground terminal of the driving circuit and is connected to the negative high voltage power supply terminal, and the voltage of the negative high voltage power supply terminal is lower than the voltage of the ground terminal in the circuit, so that the negative high voltage power supply terminal can be connected to the ground, which is equivalent to the ground.
Preferably, the ultrasonic transducer is an ultrasonic probe, the ultrasonic probe includes a wire core and a housing, and the wire core is located inside the housing.
Preferably, the wire core of the ultrasonic probe is connected with the drain electrode of the field effect transistor, and the shell of the ultrasonic probe is grounded.
Preferably, the isolation circuit has two power supply ends, and the first power supply end, the second power supply end of the isolation circuit and the power supply end of the driving circuit are connected to the negative high-voltage power supply terminal through a capacitor.
Preferably, the voltage resistance of the field effect transistor is less than or equal to one thousand two hundred volts.
Preferably, the number of the input ends and the output ends of the isolation circuit and the drive circuit are at least two, negative high voltage is applied to the drive work of the ultrasonic transmitting device, and by means of the isolation circuit and the plurality of input and output ends of the drive circuit, multi-path drive can be simultaneously realized, and high-speed drive can be realized.
Compared with the prior art, the utility model has the following advantages: the negative high voltage is applied to the driving work of the ultrasonic transmitting device, and by means of the isolation circuit and a plurality of input and output ends of the driving circuit, multi-path driving can be simultaneously realized, and high-speed driving can be realized; the high-voltage resistance characteristic of the N-channel field effect transistor is fully utilized, and the N-channel field effect transistor is used as a core component of ultrasonic driving, so that the emission intensity of ultrasonic is improved; meanwhile, the circuit has fewer components, so that the reliability is higher, and the isolation circuit is adopted, so that the field effect transistor for driving the negative high voltage by using the low-voltage pulse can be realized, and the circuit is worthy of popularization and application.
Drawings
Fig. 1 is an overall circuit diagram of the present invention.
Detailed Description
The embodiments of the present invention will be described in detail below, and the present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
As shown in fig. 1, the present embodiment provides a technical solution: an ultrasonic emission driving circuit comprises an isolation circuit U1 used for driving a pulse signal Y1, a field effect transistor G1 used for driving an ultrasonic transducer and a driving circuit U2 used for driving the field effect transistor G1, wherein the isolation circuit U1 is connected with the field effect transistor G1 through the driving circuit U2, and the field effect transistor G1 which drives negative and high voltage by using low-voltage pulse can be realized by adopting the isolation circuit U1;
the driving pulse signal Y1 is input from a Vib input pin of the isolation circuit U1, and Voa output pins of the isolation circuit U1 are respectively connected with INA and INB input pins of the driving circuit U2;
an OutB output pin of the driving circuit U2 is connected with a G pole of the field effect transistor G1, an S pole of the field effect transistor G1 is connected with a negative high power supply terminal voltage HV, and a D pole of the field effect transistor G1 is connected with an ultrasonic transducer;
the field effect tube G1 is an N-channel field effect tube which has good high-voltage resistance, and is used as a core component of ultrasonic drive, so that the ultrasonic emission intensity is improved, and the reliability is higher because of fewer components in the circuit.
In this embodiment, the isolation circuit is an isolation circuit U1, the driving pulse signal is a driving pulse signal Y1, but not only a group of driving pulse signals, the driving circuit is a driving circuit U2, and the fet is a fet G1.
Further, the VS pin of the driving circuit U2 is connected to a first positive low voltage supply terminal V1, and a capacitor HC2 is connected across the first positive low voltage supply terminal V1 for filtering.
Furthermore, a pin Vdd1 of the isolation circuit U1 is connected to a third positive low-voltage power supply terminal V3, a capacitor LC1 is connected across the third positive low-voltage power supply terminal V3 for filtering, a pin Vdd2 of the isolation circuit U1 is connected to a second positive low-voltage power supply terminal V2, and a capacitor HC1 is connected across the third positive low-voltage power supply terminal V2 for absorbing reactive current of an inductive load of the circuit, so that reactive power consumption is reduced.
Further, the voltage value of the first positive low-voltage power supply terminal V1 is smaller than the voltage value of the second positive low-voltage power supply terminal V2 by about 5V.
Furthermore, the Gnd2 pin of the isolation circuit U1 is connected in parallel with the Gnd of the driving circuit and is connected with the negative high voltage power supply terminal HV, the voltage of the negative high voltage power supply terminal HV is lower than the voltage of the ground terminal in the circuit, so that the negative high voltage power supply terminal HV is connected, which is equivalent to being grounded, and the Gnd1 pin of the isolation circuit U1 is normally grounded.
Further, in this embodiment, the ultrasonic transducer is an ultrasonic probe X1, and the ultrasonic probe X1 includes a wire core and a housing, where the wire core is located inside the housing.
Further, the wire core of the ultrasonic probe X1 is connected with the D pole of the field effect transistor, and the shell of the ultrasonic probe X1 is grounded.
Further, the voltage resistance of the field effect transistor G1 is less than or equal to one thousand two hundred volts.
Furthermore, the number of the input ends and the output ends of the isolation circuit U1 and the drive circuit U2 is two, negative high voltage HV is applied to the driving work of the ultrasonic transmitting device, and by means of the isolation circuit U1 and the plurality of input and output ends of the drive circuit U2, multi-path driving can be simultaneously realized, and high-speed driving can be achieved.
The working principle is as follows: in the working process, one or more low-voltage positive pulse signals are input to the input end of an isolation circuit U1, the positive pulse signals are isolated and converted by the isolation circuit U1 to form multiple high-voltage pulse signals, then the high-voltage pulse signals reach a driving circuit U2, and after the high-voltage pulse signals are output by the driving circuit U2, the grid-source voltage of a field-effect tube G1 is changed by matching with a negative high-voltage power supply terminal HV, so that a source electrode and a drain electrode are conducted, and an ultrasonic probe X1 can be driven to generate ultrasonic waves. The negative high voltage is applied to the driving work of the ultrasonic transmitting device, and by means of the isolation circuit U1 and a plurality of input and output ends of the driving circuit U2, multi-path driving can be realized at the same time, and high-speed driving can be realized; the high-voltage resistance characteristic of the N-channel field effect transistor is fully utilized, and the N-channel field effect transistor is used as a core component of ultrasonic driving, so that the emission intensity of ultrasonic is improved; meanwhile, the circuit has fewer components, so that the reliability is higher, and the isolation circuit U1 is adopted, so that the field effect transistor G1 for driving negative high voltage by using low-voltage pulse can be realized, and the circuit is more practical.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. An ultrasonic transmission drive circuit characterized by: the ultrasonic transducer comprises an isolation circuit for driving a pulse signal, a field effect transistor for driving an ultrasonic transducer and a driving circuit for driving the field effect transistor, wherein the isolation circuit is connected with the field effect transistor through the driving circuit;
the driving pulse signal is input from the input end of the isolation circuit, and the output end of the isolation circuit is connected with the input end of the driving circuit;
the output end of the driving circuit is connected with the grid electrode of the field effect tube, the source electrode of the field effect tube is connected with the negative high-voltage power supply terminal, and the drain electrode of the field effect tube is connected with the ultrasonic transducer;
the field effect transistor is an N-channel field effect transistor.
2. An ultrasound transmission drive circuit according to claim 1, characterized in that: the power supply end of the driving circuit is connected with a first positive low-voltage power supply terminal, the first power supply end of the isolating circuit is connected with a third positive low-voltage power supply terminal, and the second power supply end of the isolating circuit is connected with a second positive low-voltage power supply terminal.
3. An ultrasound transmission drive circuit according to claim 2, characterized in that: the voltage value of the first positive low voltage power supply terminal is smaller than the voltage value of the second positive low voltage power supply terminal.
4. An ultrasound transmission drive circuit according to claim 1, characterized in that: and the second grounding end of the isolation circuit is connected with the grounding end of the driving circuit in parallel and then is connected with the negative high-voltage power supply terminal.
5. An ultrasound transmission drive circuit according to claim 1, characterized in that: the ultrasonic transducer is an ultrasonic probe, the ultrasonic probe comprises a wire core and a shell, and the wire core is located inside the shell.
6. An ultrasound transmission drive circuit according to claim 5, characterized in that: the wire core of the ultrasonic probe is connected with the drain electrode of the field effect tube, and the shell of the ultrasonic probe is grounded.
7. An ultrasound transmission drive circuit according to claim 1, characterized in that: the isolation circuit is provided with two power supply ends, and the first power supply end, the second power supply end and the power supply end of the driving circuit of the isolation circuit are connected with the negative high-voltage power supply terminal through capacitors.
8. An ultrasound transmission drive circuit according to claim 1, characterized in that: the withstand voltage value of the field effect transistor is less than or equal to one thousand two hundred volts.
9. An ultrasound transmission drive circuit according to claim 1, characterized in that: the input ends and the output ends of the isolation circuit and the drive circuit are at least two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920916483.8U CN210252992U (en) | 2019-06-18 | 2019-06-18 | Ultrasonic emission drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920916483.8U CN210252992U (en) | 2019-06-18 | 2019-06-18 | Ultrasonic emission drive circuit |
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| Publication Number | Publication Date |
|---|---|
| CN210252992U true CN210252992U (en) | 2020-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920916483.8U Active CN210252992U (en) | 2019-06-18 | 2019-06-18 | Ultrasonic emission drive circuit |
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| CN (1) | CN210252992U (en) |
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- 2019-06-18 CN CN201920916483.8U patent/CN210252992U/en active Active
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