CN215534823U - Signal acquisition circuit for ultrasonic transducer - Google Patents
Signal acquisition circuit for ultrasonic transducer Download PDFInfo
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- CN215534823U CN215534823U CN202120119400.XU CN202120119400U CN215534823U CN 215534823 U CN215534823 U CN 215534823U CN 202120119400 U CN202120119400 U CN 202120119400U CN 215534823 U CN215534823 U CN 215534823U
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Abstract
The utility model provides a signal acquisition circuit for an ultrasonic transducer, which comprises a voltage acquisition circuit module and a current acquisition circuit module, wherein the voltage acquisition circuit module and the current acquisition circuit module are used for acquiring voltage and current signals of the ultrasonic transducer. The voltage acquisition circuit module comprises a voltage sampling unit, a first amplification unit, a first isolation unit, a first filtering unit and a second amplification unit which are sequentially connected in series, the current acquisition circuit module comprises a current sampling unit, a third amplification unit, a second isolation unit, a second filtering unit and a fourth amplification unit which are sequentially connected in series, the circuit structure is adopted to provide real-time and accurate voltage and current signals for a post-stage processing circuit, the phase difference between the voltage signals and the current signals and the input power of the transducer are detected, and the basis is provided for the resonant frequency regulation and the power regulation of the ultrasonic transducer.
Description
Technical Field
The utility model belongs to the technical field of medical instruments, and particularly relates to a signal acquisition circuit for an ultrasonic transducer.
Background
An ultrasonic transducer is a device that converts electromagnetic energy into mechanical energy, made of piezoelectric ceramics or other magnetostrictive materials. The ultrasonic transducer is a piezoelectric ceramic stack resonating at ultrasonic frequency, and the piezoelectric effect of the piezoelectric ceramic stack converts electrical signals and electrical energy into mechanical vibration.
The electric oscillation signal in the ultrasonic transducer causes the change of an electric field or a magnetic field in the piezoelectric energy storage element, the change causes the piezoelectric energy storage element to stretch and displace, mechanical vibration wave energy with electric oscillation type frequency is output outwards, and the energy of the mechanical vibration wave acts on tissues to cut or stop bleeding after being transmitted and amplified in amplitude.
The ultrasonic transducer in the prior art has the defects of not adjustable vibration state, not maximum output energy, not strong amplitude and poor effect. A sampling circuit capable of collecting the voltage and current output by the ultrasonic transducer is required, so as to provide a basis for the resonance adjustment of the subsequent stage.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to overcome the above-mentioned deficiencies in the prior art, and to provide a signal acquisition circuit for an ultrasonic transducer, wherein a voltage signal and a current signal are detectable and stable, so as to detect whether the voltage signal and the current signal are in phase for a voltage signal acquisition processing circuit and a current signal acquisition processing circuit at a subsequent stage, and provide a basis for resonance adjustment, thereby enabling the ultrasonic transducer to be in a resonance state.
The utility model is realized in such a way that a signal acquisition circuit for an ultrasonic transducer comprises:
the voltage acquisition circuit module is used for acquiring a voltage signal of the ultrasonic transducer;
the current acquisition circuit module is used for acquiring a current signal of the ultrasonic transducer;
the voltage acquisition circuit module comprises a voltage sampling unit, a first amplification unit, a first isolation unit, a first filtering unit and a second amplification unit which are sequentially connected in series;
the current acquisition circuit module comprises a current sampling unit, a third amplification unit, a second isolation unit, a second filtering unit and a fourth amplification unit which are sequentially connected in series.
Specifically, the voltage sampling unit consists of a series resistor and is used for reducing the voltage of the high voltage output to the anode of the ultrasonic transducer;
the current sampling unit consists of series resistors and is used for converting a loop current signal in the ultrasonic transducer into a voltage signal for collection.
Specifically, the first amplification unit and the third amplification unit respectively include: the amplifier comprises a first amplifier and a peripheral resistor which is connected to the periphery of the first amplifier and used for setting amplification factors so as to amplify a voltage signal and a current signal in proportion.
Specifically, the first isolation unit and the second isolation unit are both transformers and are used for transmitting voltage signals and current signals output by the first amplification unit and the third amplification unit to the post-stage filtering unit after isolation and conversion.
Specifically, the first filtering unit and the second filtering unit respectively comprise filtering resistors arranged in parallel and filtering capacitors connected between the filtering resistors and used for filtering noise waves in voltage signals and current signals output by the first filtering unit and the second filtering unit.
Specifically, the second amplification unit and the fourth amplification unit respectively comprise a second amplifier and a peripheral resistor connected to the periphery of the second amplifier for setting amplification factors, and are used for amplifying the voltage signal and the current signal in proportion.
More specifically, the specific structure of the series resistor of the voltage sampling unit is as follows:
the ultrasonic transducer comprises a plurality of first resistors and a plurality of second resistors, wherein the first resistors are arranged in series, the second resistors are arranged in parallel, one ends of the first resistors and the first second resistors are respectively connected with the anode of the ultrasonic transducer, and the other ends of the last resistors are respectively grounded.
More specifically, the specific structure of the series resistor of the current sampling unit is as follows:
and the other end of the last third resistor is respectively connected with the first resistor, the second resistor and the negative end of the ultrasonic transducer, and the other end of the third resistor is also grounded.
More specifically, the first amplification unit and the third amplification unit have the following specific structures:
the first amplifier comprises a Vout-end, a Vout + end, a VIN-end, a VCC + end, a PD end and a Vocm end;
the peripheral resistor comprises a fourth resistor, a fifth resistor, a sixth resistor and a seventh resistor;
the Vout-end is respectively connected with one end of the fourth resistor and one end of the primary of the transformer;
the Vout + end is respectively connected with one end of the sixth resistor and the other end of the primary of the transformer, the other end of the sixth resistor is respectively connected with the VIN-end and one end of the seventh resistor, and the other end of the seventh resistor is connected with the Vocm end and grounded;
the VCC-end is used for being connected with the negative end of a 5V power supply;
the VCC + end is used for being connected with the positive end of a 5V power supply;
the PD end is used for being connected with the positive end of a 5V power supply;
and the VIN + end is connected with a node between the fourth resistor and the fifth resistor.
Specifically, one end and the other end of the secondary of the mutual inductor are respectively connected with one ends of two filter resistors which are arranged in parallel.
More specifically, the specific structures of the second amplification unit and the fourth amplification unit are as follows:
the second amplifier comprises two RG ends, an IN end, a VS + end, an IN + end, an OUT end, a VS-end and a REF end;
the peripheral resistors of the second amplifying unit and the fourth amplifying unit are at least one ninth resistor;
and the IN-end and the IN + end are respectively connected with the other ends of the two filter resistors arranged IN parallel.
The VS + end is connected with the positive end of the 12V power supply;
the VS-end is connected with the negative end of the 12V power supply;
the REF terminal is grounded.
The OUT end in the second amplifying unit is used for being connected with a voltage signal acquisition and processing circuit;
and the OUT end in the fourth amplifying unit is used for being connected with a current signal acquisition and processing circuit.
The utility model provides an electric signal acquisition circuit for an ultrasonic transducer, which comprises an acquisition circuit module for acquiring voltage and current signals of the ultrasonic transducer. The voltage acquisition circuit module comprises a voltage sampling unit, a first amplification unit, a first isolation unit, a first filtering unit and a second amplification unit which are sequentially connected in series, the current acquisition circuit module comprises a current sampling unit, a third amplification unit, a second isolation unit, a second filtering unit and a fourth amplification unit which are sequentially connected in series, the circuit structure is adopted to provide real-time and accurate voltage and current signals for a post-stage processing circuit, the phase difference between the voltage signals and the current signals and the input power of the transducer are detected, and the basis is provided for the resonant frequency regulation and the power regulation of the ultrasonic transducer.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a signal acquisition circuit for an ultrasonic transducer according to an embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a signal acquisition circuit for an ultrasonic transducer, including:
the voltage acquisition circuit module 1 is used for acquiring a voltage signal of the ultrasonic transducer;
the current acquisition circuit module 2 is used for acquiring current signals of the ultrasonic transducer;
the voltage acquisition circuit module 1 comprises a voltage sampling unit 11, a first amplifying unit 12, a first isolating unit 13, a first filtering unit 14 and a second amplifying unit 15 which are sequentially connected in series;
the current acquisition circuit module 2 includes a current sampling unit 21, a third amplifying unit 22, a second isolating unit 23, a second filtering unit 24 and a fourth amplifying unit 25 which are connected in series in sequence.
Specifically, the voltage sampling unit 11 is composed of a series resistor, and is used for stepping down the high voltage output to the anode of the ultrasonic transducer;
the current sampling unit 21 is composed of series resistors and is used for converting a loop current signal in the ultrasonic transducer into a voltage signal for collection.
Specifically, the first amplification unit 12 and the third amplification unit 22 respectively include: the first amplifier U1 and a peripheral resistor connected to the periphery of the first amplifier U1 for setting amplification factors to proportionally amplify the voltage signal and the current signal.
Specifically, the first isolation unit 13 and the second isolation unit 23 are both transformers, and are configured to isolate and convert voltage signals and current signals output by the first amplification unit 12 and the third amplification unit 22, and transmit the voltage signals and the current signals to a post-stage filtering unit.
Specifically, the first filtering unit 14 and the second filtering unit 24 respectively include filtering resistors arranged in parallel and a filtering capacitor C connected between the filtering resistors, and are configured to filter noise in the voltage signal and the current signal output by the first filtering unit 14 and the second filtering unit 24.
Specifically, the second amplifying unit 15 and the fourth amplifying unit 25 respectively include a second amplifier U2 and a peripheral resistor connected to the outer periphery of the second amplifier U2 for setting amplification factors for proportionally amplifying the voltage signal and the current signal.
More specifically, the specific structure of the series resistor of the voltage sampling unit 11 is as follows:
the ultrasonic transducer comprises a plurality of first resistors R1 arranged in series and a plurality of second resistors R2 arranged in series, wherein the first resistors R1 and the second resistors R2 are arranged in parallel, one ends of a first resistor R1 and a first second resistor R2 are respectively connected with the anode of the ultrasonic transducer, and the other ends of a last first resistor R1 and a last second resistor R2 are respectively grounded.
More specifically, the specific structure of the series resistor of the current sampling unit 21 is as follows:
and the plurality of third resistors R3 are arranged in series, wherein one end of the first third resistor R3 is connected with the negative terminal of the power supply, the other end of the last third resistor R3 is respectively connected with the first resistor R1, the second resistor R2 and the negative terminal of the ultrasonic transducer, and the other end of the third resistor R3 is also grounded.
More specifically, the specific structures of the first amplification unit 12 and the third amplification unit 22 are as follows:
the first amplifier U1 comprises a Vout-end, a Vout + end, a VIN-end, a VCC + end, a PD end and a Vocm end;
the peripheral resistor comprises a fourth resistor R4, a fifth resistor R5, a sixth resistor R6 and a seventh resistor R7;
the Vout-end is respectively connected with one end of a fourth resistor R4 and the primary end of the transformer;
the Vout + end is respectively connected with one end of a sixth resistor R6 and the other end of the primary of the transformer, the other end of a sixth resistor R6 is respectively connected with the VIN-end and one end of a seventh resistor R7, and the other end of a seventh resistor R7 is connected with the Vocm end and grounded;
the VCC-end is used for being connected with the negative end of the 5V power supply;
the VCC + end is used for being connected with the positive end of a 5V power supply;
the PD end is used for being connected with the positive end of a 5V power supply;
the VIN + terminal is connected to a node between the fourth resistor R4 and the fifth resistor R5.
Specifically, one end and the other end of the secondary of the mutual inductor are respectively connected with one ends of two filter resistors R8 which are arranged in parallel.
More specifically, the specific structures of the second amplification unit 15 and the fourth amplification unit 25 are as follows:
the second amplifier U2 comprises two RG ends, an IN end, a VS + end, an IN + end, an OUT end, a VS-end and a REF end;
the peripheral resistance of the second amplifying unit 15 and the fourth amplifying unit 25 is at least one ninth resistance R9;
and a ninth resistor R9 is connected between the two RG ends, and the IN-end and the IN + end are respectively connected with the other ends of the two filter resistors R8 which are arranged IN parallel.
The VS + end is connected with the positive end of the 12V power supply;
the VS-end is connected with the negative end of the 12V power supply;
the REF terminal is connected to ground.
The OUT terminal of the second amplifying unit 15 is used for being connected with a voltage signal acquisition and processing circuit;
and the OUT terminal of the fourth amplifying unit 25 is used for being connected with a current signal acquisition and processing circuit.
The utility model provides an electric signal acquisition circuit for an ultrasonic transducer, which comprises a voltage acquisition circuit module 1 and a current acquisition circuit module 2, wherein the voltage acquisition circuit module 1 and the current acquisition circuit module 2 are used for acquiring voltage and current signals of the ultrasonic transducer. The voltage acquisition circuit module 1 comprises a voltage sampling unit 11, a first amplifying unit 12, a first isolating unit 13, a first filtering unit 14 and a second amplifying unit 15 which are sequentially connected in series, the current acquisition circuit module 2 comprises a current sampling unit 21, a third amplifying unit 22, a second isolating unit 23, a second filtering unit 24 and a fourth amplifying unit 25 which are sequentially connected in series, the circuit structure is adopted to provide real-time and accurate voltage and current signals for a rear-stage processing circuit, phase difference between the voltage signals and the current signals and calculation of input power of the transducer are detected, and basis is provided for resonant frequency adjustment and power adjustment of the ultrasonic transducer.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the utility model.
Claims (10)
1. A signal acquisition circuit for an ultrasonic transducer, comprising:
the voltage acquisition circuit module (1) is used for acquiring a voltage signal of the ultrasonic transducer;
the current acquisition circuit module (2) is used for acquiring a current signal of the ultrasonic transducer;
the voltage acquisition circuit module (1) comprises a voltage sampling unit (11), a first amplifying unit (12), a first isolating unit (13), a first filtering unit (14) and a second amplifying unit (15) which are sequentially connected in series;
the current acquisition circuit module (2) comprises a current sampling unit (21), a third amplification unit (22), a second isolation unit (23), a second filtering unit (24) and a fourth amplification unit (25) which are sequentially connected in series.
2. The signal acquisition circuit for an ultrasonic transducer according to claim 1, wherein said voltage sampling unit (11) is composed of a series resistor for stepping down the high voltage outputted to the anode of the ultrasonic transducer;
the current sampling unit (21) is composed of series resistors and is used for converting a loop current signal in the ultrasonic transducer into a voltage signal for collection.
3. The signal acquisition circuit for an ultrasonic transducer according to claim 1, wherein said first amplification unit (12) and third amplification unit (22) respectively comprise: the device comprises a first amplifier (U1) and a peripheral resistor which is connected to the periphery of the first amplifier (U1) and is used for setting amplification factors so as to proportionally amplify a voltage signal and a current signal.
4. The signal acquisition circuit for the ultrasonic transducer according to claim 3, wherein the first isolation unit (13) and the second isolation unit (23) are transformers, and are used for isolating and converting the voltage signals and the current signals output by the first amplification unit (12) and the third amplification unit (22) and then transmitting the signals to the post-stage filtering unit.
5. The signal acquisition circuit for an ultrasonic transducer according to claim 4, wherein said first filtering unit (14) and said second filtering unit (24) respectively comprise filtering resistors arranged in parallel and a filtering capacitor (C) connected between said filtering resistors for filtering out noise in the voltage signal and the current signal outputted from the first filtering unit (14) and the second filtering unit (24).
6. The signal acquisition circuit for an ultrasonic transducer according to claim 5, wherein said second amplification unit (15) and fourth amplification unit (25) respectively comprise a second amplifier (U2) and a peripheral resistor connected to the periphery of said second amplifier (U2) for setting amplification factors for scaling up the voltage signal and the current signal.
7. The signal acquisition circuit for an ultrasonic transducer according to claim 2, wherein the series resistance of said voltage sampling unit (11) has the specific structure:
the ultrasonic transducer comprises a plurality of first resistors (R1) arranged in series and a plurality of second resistors (R2) arranged in series, wherein the first resistors (R1) and the second resistors (R2) are arranged in parallel, one ends of the first resistors (R1) and the first resistors (R2) are respectively connected with the anode of the ultrasonic transducer, and the other ends of the last resistors (R1) and the last resistors (R2) are respectively connected with the ground.
8. The signal acquisition circuit for an ultrasonic transducer according to claim 7, wherein the series resistance of said current sampling unit (21) has the specific structure:
a plurality of third resistors (R3) arranged in series, wherein one end of the first third resistor (R3) is connected with the negative terminal of a power supply, the other end of the last third resistor (R3) is respectively connected with the first resistor (R1), the second resistor (R2) and the negative terminal of the ultrasonic transducer, and the other end of the third resistor (R3) is also grounded.
9. The signal acquisition circuit for an ultrasonic transducer according to claim 5, wherein said first amplification unit (12) and said third amplification unit (22) are structured in such a way that:
the first amplifier (U1) comprises a Vout-end, a Vout + end, a VIN-end, a VCC + end, a PD end and a Vocm end;
the peripheral resistors comprise a fourth resistor (R4), a fifth resistor (R5), a sixth resistor (R6) and a seventh resistor (R7);
the Vout-end is respectively connected with one end of the fourth resistor (R4) and the primary end of the transformer;
the Vout + end is respectively connected with one end of a sixth resistor (R6) and the other end of the primary of the transformer, the other end of the sixth resistor (R6) is respectively connected with the VIN-end and one end of a seventh resistor (R7), and the other end of the seventh resistor (R7) is connected with the Vocm end and grounded;
the VCC-end is used for being connected with the negative end of a 5V power supply;
the VCC + end is used for being connected with the positive end of a 5V power supply;
the PD end is used for being connected with the positive end of a 5V power supply;
the VIN + terminal is connected with a node between the fourth resistor (R4) and the fifth resistor (R5);
and one end and the other end of the secondary of the mutual inductor are respectively connected with one ends of the two filter resistors (R8) which are arranged in parallel.
10. The signal acquisition circuit for an ultrasonic transducer according to claim 6, wherein said second amplification unit (15) and said fourth amplification unit (25) are specifically structured as follows:
the second amplifier (U2) comprises two RG ends, an IN end, a VS + end, an IN + end, an OUT end, a VS-end and a REF end;
the peripheral resistance of the second amplifying unit (15) and the fourth amplifying unit (25) is at least a ninth resistance (R9);
the ninth resistor (R9) is connected between the two RG ends, and the IN-end and the IN + end are respectively connected with the other ends of the two filter resistors (R8) which are arranged IN parallel;
the VS + end is connected with the positive end of the 12V power supply;
the VS-end is connected with the negative end of the 12V power supply;
the REF end is grounded;
the OUT end in the second amplifying unit (15) is used for being connected with a voltage signal acquisition and processing circuit;
and the OUT end in the fourth amplifying unit (25) is used for being connected with a current signal acquisition and processing circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120119400.XU CN215534823U (en) | 2021-01-18 | 2021-01-18 | Signal acquisition circuit for ultrasonic transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120119400.XU CN215534823U (en) | 2021-01-18 | 2021-01-18 | Signal acquisition circuit for ultrasonic transducer |
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| Publication Number | Publication Date |
|---|---|
| CN215534823U true CN215534823U (en) | 2022-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120119400.XU Active CN215534823U (en) | 2021-01-18 | 2021-01-18 | Signal acquisition circuit for ultrasonic transducer |
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| CN (1) | CN215534823U (en) |
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- 2021-01-18 CN CN202120119400.XU patent/CN215534823U/en active Active
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