CN217083885U - Ultrasonic probe drive circuit - Google Patents
Ultrasonic probe drive circuit Download PDFInfo
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- CN217083885U CN217083885U CN202220101278.8U CN202220101278U CN217083885U CN 217083885 U CN217083885 U CN 217083885U CN 202220101278 U CN202220101278 U CN 202220101278U CN 217083885 U CN217083885 U CN 217083885U
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Abstract
The utility model belongs to the technical field of drive circuit, especially, an ultrasonic probe drive circuit, this ultrasonic probe drive circuit includes the adjustable drive unit of voltage, alternating voltage generating element and trailing signal suppression unit, wherein, the adjustable drive unit of voltage is used for exporting adjustable direct current voltage, alternating voltage generating element is used for exporting the change voltage of loading at the ultrasonic probe both ends, trailing signal suppression unit is used for the voltage loading with alternating voltage generating element output at the ultrasonic probe both ends in the first aspect, the second aspect is used for restraining the trailing signal, the third aspect is used for accepting the signal of ultrasonic probe feedback, wherein, resistance R5 in the trailing signal suppression unit, resistance R6, 3 grades of suppression circuit are constituteed to resistance R7, reduce ultrasonic probe's trailing signal by a wide margin, reduce ultrasonic probe's detection blind area.
Description
Technical Field
The utility model belongs to the technical field of drive circuit, concretely relates to ultrasonic probe drive circuit.
Background
The ultrasonic probe is a device for transmitting and receiving ultrasonic waves in the ultrasonic detection process, the ultrasonic probe is a transducer for converting electric energy and sound energy by utilizing the piezoelectric effect of materials, the key component in the probe is a wafer, and the wafer is a single crystal or polycrystalline sheet with the piezoelectric effect and has the function of converting the electric energy and the sound energy into each other.
The performance of the ultrasonic wave generating and receiving device is influenced by the performance of the probe on one hand and the driving circuit on the other hand, wherein the driving principle of the ultrasonic wave probe is that the ceramic plate is driven to vibrate by applying variable voltage so as to emit corresponding ultrasonic waves. At present, the ultrasonic drive circuit has a big problem in how to control the trailing condition of the sound wave without seriously affecting the signal receiving sensitivity so as to shorten the blind area of detection. For example, when the oil level of the oil tank is detected by the ultrasonic probe, the ultrasonic probe emits ultrasonic waves upwards at the bottom of the oil tank, when the oil level is low, due to the existence of a trailing signal, an echo signal can be received when the trailing signal does not disappear, the echo signal is mixed with the trailing signal, and a real oil level echo cannot be distinguished, so that the ultrasonic detection device cannot really know the real oil level when the oil amount is low.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an ultrasonic probe drive circuit, there is the obvious trailing condition in the signal of ultrasonic detection system transmission among the solution prior art, leads to having the technical problem of great detection blind area.
In order to solve the technical problem, the utility model discloses a following technical scheme:
provided is an ultrasonic probe drive circuit including:
the voltage-adjustable driving unit is used for outputting direct-current voltage;
the alternating voltage generating unit comprises a transformer, and the direct-current voltage output by the voltage-adjustable driving unit is used as a voltage source of the transformer;
the tail signal suppression unit comprises a resistor R5, two ends of the resistor R5 are respectively and electrically connected with the output end of the transformer, the resistor R5 is provided with a resistor R6 in parallel, and the resistor R6 is provided with a resistor R7 in parallel; a diode D2 and a diode D3 are electrically connected between the resistor R5 and the resistor R6, and the diode D2 and the diode D3 are connected in parallel and have opposite conduction directions; a diode D4 is electrically connected between the resistor R5 and the other end of the resistor R6 connected in parallel, and the conducting direction of the diode D4 is from the resistor R5 to the resistor R6; the output end of the diode D4 is electrically connected with a diode D5, the conduction direction of the diode D5 is the same as that of the diode D4, one end of the diode D5 is electrically connected with the resistor R6, and the other end of the diode D5 is electrically connected with the resistor R7; the input of the diode D4 and the output of the diode D5 are grounded;
one end of the resistor R6, which is connected with the diode D2 and the diode D3, is an ultrasonic probe driving voltage output terminal, and the other end of the resistor R6 is a signal acquisition terminal.
Preferably, the voltage-adjustable driving unit comprises a voltage adjusting subunit and a voltage stabilizing subunit, a voltage output end of the voltage adjusting subunit is electrically connected with a resistor R3, an output end of the resistor R3 is grounded through an energy storage capacitor C1, and an output terminal of the resistor R3 is used for providing an operating voltage for the alternating voltage generating unit;
the voltage regulation subunit comprises a voltage regulation chip U1 and peripheral circuits thereof, a control signal input terminal of the voltage regulation chip U1 is electrically connected with a resistor R8, and the other end of the resistor R8 is used for inputting a control signal so as to regulate the output voltage of the voltage regulation chip U1;
the voltage stabilizing subunit comprises a resistor R4 and a resistor R9 which are connected in series, the other end of the resistor R4 is electrically connected to the output end of the voltage regulating subunit, the other end of the resistor R9 is grounded, and a capacitor C2 is connected in parallel between the resistor R4 and the resistor R9; the control signal input terminal of the voltage regulating chip U1 is electrically connected between the resistor R4 and the resistor R9.
Preferably, the transformer has two sets of primary windings and one set of secondary windings, and the cathodes of the two sets of primary windings are grounded through the first electronic switch and the second electronic switch respectively.
Preferably, the first electronic switch and the second electronic switch are both MOS transistors.
Compared with the prior art, the beneficial effects of the utility model are that: the ultrasonic probe driving circuit comprises a voltage-adjustable driving unit, an alternating voltage generating unit and a trailing signal restraining unit, wherein the voltage-adjustable driving unit is used for outputting adjustable direct-current voltage, the alternating voltage generating unit is used for outputting variable voltage loaded at two ends of an ultrasonic probe, the trailing signal restraining unit is used for loading voltage output by the alternating voltage generating unit at two ends of the ultrasonic probe on the first aspect, the second aspect is used for restraining trailing signals, the third aspect is used for receiving signals fed back by the ultrasonic probe, wherein a resistor R5, a resistor R6 and a resistor R7 in the trailing signal restraining unit form a 3-order restraining circuit, the trailing signals of the ultrasonic probe are greatly reduced, and the detection blind area of the ultrasonic probe is reduced.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a circuit diagram of a voltage-adjustable driving unit in an embodiment of the driving circuit of the ultrasonic probe of the present invention.
Fig. 2 is a circuit diagram of an alternating voltage generating unit and a trailing signal suppressing unit in an embodiment of the ultrasonic probe driving circuit of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Fig. 1 and 2 show an ultrasonic probe driving circuit.
The ultrasonic probe driving circuit comprises a voltage-adjustable driving unit as shown in fig. 1, the voltage-adjustable driving unit comprises a voltage adjusting subunit 10 and a voltage stabilizing subunit 20, the voltage adjusting subunit 10 is used for adjusting voltage, the voltage stabilizing subunit 20 plays a role in stabilizing voltage, the voltage-adjustable driving unit is a boost DC/DC conversion circuit, and the voltage-adjustable driving unit is used for outputting direct-current voltage.
The ultrasonic probe driving circuit further comprises an alternating voltage generating unit 30 and a trailing signal suppressing unit 40 shown in fig. 2, wherein the alternating voltage generating unit 30 is used for providing alternating voltage, and the trailing signal suppressing unit 40 is used for providing working voltage for the ultrasonic probe, suppressing a trailing signal and receiving a signal fed back by the ultrasonic probe.
As shown in fig. 1, a resistor R3 is electrically connected to the voltage output terminal (the output terminal of the zener diode D1) of the voltage regulator subunit 10, and the resistor R3 is a buffer resistor to reduce the impact of the driving circuit on the load; the output terminal of the resistor R3 is connected to ground via the energy storage capacitor C1, and the output terminal VADJ of the resistor R3 is used to supply the operating voltage to the alternating voltage generating unit 30.
The voltage regulation subunit 10 comprises a voltage regulation chip U1 and a peripheral circuit thereof, the peripheral circuit comprises a filter capacitor C3, a boost inductor L1 and a voltage stabilizing diode D1, a pin LX of the voltage regulation chip U1 is connected with an output end of the boost inductor L1, and the pin LX is opened and closed intermittently, so that an induced voltage generated by the boost inductor L1 is superposed with VDD-IN to achieve the purpose of boosting.
The control signal input terminal FB of the voltage regulating chip U1 is electrically connected to a resistor R8, and the other end of the resistor R8 is used for inputting a control signal to regulate the output voltage of the voltage regulating chip U1, specifically, the control voltage VOUT is loaded at the other end of the resistor R8, so that the magnitude of the output voltage of the voltage regulating subunit 10 can be changed, wherein the control voltage VOUT is inversely proportional to the output voltage of the voltage regulating subunit 10.
The voltage stabilizing subunit 20 comprises a resistor R4 and a resistor R9 which are connected in series, the other end of the resistor R4 is electrically connected to the output end of the voltage regulating subunit 10 (the output end of the voltage stabilizing diode D1), the other end of the resistor R9 is grounded, a capacitor C2 is connected in parallel between the resistor R4 and the resistor R9, and the capacitor C2 plays a role in filtering; in addition, the control signal input terminal FB of the voltage regulating chip U1 is electrically connected between the resistor R4 and the resistor R9, so that the voltage is fed back by the output voltage of the voltage regulator subunit 20 to affect the output voltage of the voltage regulator subunit 10.
As shown in fig. 2, the alternating voltage generating unit 30 includes a transformer T1, and the dc voltage VADJ output by the voltage adjustable driving unit is used as a voltage source of a transformer T1, and the dc voltage VADJ is applied to a pin 2 of the transformer T1. The transformer T1 has two groups of primary windings (a group of primary windings is between pin 1 and pin 2, another group of primary windings is between pin 3 and pin 2), and a group of secondary windings (pin 4 and pin 5 of the secondary windings are both grounded), the cathodes of the two groups of primary windings are grounded through a first electronic switch Q1A and a second electronic switch Q1B respectively, the first electronic switch Q1A and the second electronic switch Q1B are both MOS tubes, wherein a resistor R2 is arranged between pin 1 and pin 5 of the first electronic switch Q1A, the resistor R2 is connected in series with a resistor R1, a user input control signal DriverA is at the other end of the resistor R1, and pin 1 of the first electronic switch Q1A is electrically connected to the output end of the resistor R1; a resistor R11 is arranged between the pin 2 and the pin 3 of the second electronic switch Q1B, the resistor R11 is connected in series with the resistor R10, the other end of the resistor R10 is used for inputting a control signal DriverB, and the pin 3 of the second electronic switch Q1B is electrically connected to the output end of the resistor R10.
The trailing signal suppression unit 40 comprises a resistor R5, two ends of which are respectively electrically connected to the output end of the transformer T1, a resistor R6 is connected in parallel to the resistor R5, a resistor R7 is connected in parallel to the resistor R6, and a 3-step suppression circuit is formed by the resistor R5, the resistor R6 and the resistor R7, so that the trailing signal of the ultrasonic probe is greatly reduced.
A diode D2 and a diode D3 are electrically connected between the resistor R5 and the resistor R6, and a diode D2 and a diode D3 are connected in parallel and have opposite conduction directions; a diode D4 is electrically connected between the resistor R5 and the other end of the resistor R6 which are connected in parallel, and the conducting direction of the diode D4 is from the resistor R5 to the resistor R6; the output end of the diode D4 is electrically connected with a diode D5, the conduction direction of the diode D5 is the same as that of the diode D4, one end of the diode D5 is electrically connected with the resistor R6, the other end of the diode D5 is electrically connected with the resistor R7, and the input end of the diode D4 and the output end of the diode D5 are grounded; one end of the resistor R6, which is connected with the diode D2 and the diode D3, is a driving voltage output terminal WAVEOUT of the ultrasonic probe, and the other end of the resistor R6 is a signal acquisition terminal WAVEIN, and the signal acquisition terminal WAVEIN acquires an electric signal fed back by the ultrasonic probe.
When the ultrasonic probe works, the control signal DriverA and the control signal DriverB respectively control the first electronic switch Q1A and the second electronic switch Q1B to be switched on and off alternately, square wave driving signals are provided between the primary coil 12 and the primary coil 23 of the transformer T1, sine pulse driving voltage is induced between the pin 6 and the pin 4 of the secondary coil of the transformer T1, and after the sine pulse driving voltage is isolated by the diode D2 and the diode D3, the sine pulse driving voltage is added to two ends of the ultrasonic probe through an ultrasonic probe driving voltage output terminal WAVEOUT.
The resistor R5 as a first-stage suppression circuit can greatly shorten the tail length of the driving circuit, and meanwhile, because the diode D2 and the diode D3 are isolated, the resistor R5 does not affect the size of the received signal output by the signal acquisition terminal WAVEIN; the resistor R6, the diode D4 and the diode D5 are used as a second-stage suppression circuit, so that the tail can be suppressed, and signals received by the signal acquisition terminal WAVEIN can be taken out to the input end of the signal amplification circuit; the resistor R7 is directly connected in parallel at two ends of the ultrasonic probe as a third-stage suppression circuit, and the resistor R7 and other parts form a parallel resonance circuit which can filter a part of trailing signals.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. An ultrasonic probe drive circuit characterized by comprising:
the voltage-adjustable driving unit is used for outputting direct-current voltage;
the alternating voltage generating unit comprises a transformer, and the direct-current voltage output by the voltage-adjustable driving unit is used as a voltage source of the transformer;
the tail signal suppression unit comprises a resistor R5, two ends of the resistor R5 are respectively and electrically connected with the output end of the transformer, the resistor R5 is provided with a resistor R6 in parallel, and the resistor R6 is provided with a resistor R7 in parallel; a diode D2 and a diode D3 are electrically connected between the resistor R5 and the resistor R6, and the diode D2 and the diode D3 are connected in parallel and have opposite conduction directions; a diode D4 is electrically connected between the resistor R5 and the other end of the resistor R6 connected in parallel, and the conducting direction of the diode D4 is from the resistor R5 to the resistor R6; the output end of the diode D4 is electrically connected with a diode D5, the conduction direction of the diode D5 is the same as that of the diode D4, one end of the diode D5 is electrically connected with the resistor R6, and the other end of the diode D5 is electrically connected with the resistor R7; the input of the diode D4 and the output of the diode D5 are grounded;
one end of the resistor R6, which is connected with the diode D2 and the diode D3, is an ultrasonic probe driving voltage output terminal, and the other end of the resistor R6 is a signal acquisition terminal.
2. The ultrasonic probe drive circuit according to claim 1, characterized in that: the voltage-adjustable driving unit comprises a voltage adjusting subunit and a voltage stabilizing subunit, wherein a voltage output end of the voltage adjusting subunit is electrically connected with a resistor R3, an output end of the resistor R3 is grounded through an energy storage capacitor C1, and an output terminal of the resistor R3 is used for providing working voltage for the alternating voltage generating unit;
the voltage regulation subunit comprises a voltage regulation chip U1 and peripheral circuits thereof, a control signal input terminal of the voltage regulation chip U1 is electrically connected with a resistor R8, and the other end of the resistor R8 is used for inputting a control signal so as to regulate the output voltage of the voltage regulation chip U1;
the voltage stabilizing subunit comprises a resistor R4 and a resistor R9 which are connected in series, the other end of the resistor R4 is electrically connected to the output end of the voltage regulating subunit, the other end of the resistor R9 is grounded, and a capacitor C2 is connected in parallel between the resistor R4 and the resistor R9; the control signal input terminal of the voltage regulating chip U1 is electrically connected between the resistor R4 and the resistor R9.
3. The ultrasonic probe drive circuit according to claim 1, characterized in that: the transformer is provided with two groups of primary windings and one group of secondary windings, and the cathodes of the two groups of primary windings are grounded through the first electronic switch and the second electronic switch respectively.
4. The ultrasonic probe drive circuit according to claim 3, characterized in that: the first electronic switch and the second electronic switch are both MOS tubes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220101278.8U CN217083885U (en) | 2022-01-15 | 2022-01-15 | Ultrasonic probe drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220101278.8U CN217083885U (en) | 2022-01-15 | 2022-01-15 | Ultrasonic probe drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217083885U true CN217083885U (en) | 2022-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220101278.8U Active CN217083885U (en) | 2022-01-15 | 2022-01-15 | Ultrasonic probe drive circuit |
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| Country | Link |
|---|---|
| CN (1) | CN217083885U (en) |
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2022
- 2022-01-15 CN CN202220101278.8U patent/CN217083885U/en active Active
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