A short-sequence acoustic wave generation component and a wave train measurement instrument

Abstract

The present invention relates to a short-sequence acoustic wave generating component and a wave train measuring instrument, comprising a power supply unit, an excitation unit, an acoustic wave transmitting unit and an energy recovery unit; the acoustic wave transmitting unit includes a transmitting sensor X1; the input end of the excitation unit is connected to the power supply unit, and the output end is connected to the transmitting sensor, and is used for exciting the transmitting sensor to vibrate so as to transmit acoustic waves; the energy recovery unit is connected to the transmitting sensor and is used for consuming the electric energy stored in the transmitting sensor during the vibration of the transmitting sensor; by setting the energy recovery unit, the energy stored in the transmitting sensor is recovered in the positive half-cycle and / or negative half-cycle of the vibration of the transmitting sensor by consuming electric energy, forcing the acoustic wave transmitting sensor to quickly stop vibrating, so that the wave train length of the acoustic waves emitted by the transmitting sensor is greatly shortened, avoiding the overlap of the latter arrival wave and the latter half of the first arrival wave, and improving the measurement effect of the full wave train measurement of acoustic waves.

Description

Technical Field

[0001] The present invention relates to the technical field of acoustic wave measurement, and particularly relates to a short-sequence acoustic wave generating component and a wave train measuring instrument. Background Art

[0002] Acoustic wave measurement technology, as a non-contact measurement technology, has been widely applied. Acoustic wave measurement technology generally faces relatively complex acoustic environments. For example, it may face multiple acoustic wave propagation paths, multiple reflectors, or different propagation modes (longitudinal waves, transverse waves, or Stoneley waves, etc.). These situations will result in the waveform received by the receiving sensor being a superposition of various waveforms. And we often need to focus on the characteristics of the late-arriving waves. For example, in oil logging, we need to measure the late-arriving transverse wave, and we are very concerned about the acoustic waves reflected by the second interface of the cement bond arriving later, etc.

[0003] If the acoustic wave train is too long, the late-arriving wave will overlap with the second half of the early-arriving wave and cannot be recognized. If we can effectively shorten the length of the acoustic wave train, the late-arriving wave and the early-arriving wave can be fully separated.

[0004] The reason for the too-long acoustic wave train may be that the frequency band of the receiving sensor is too narrow, or it may be that resonance echoes are formed in the measured medium by the acoustic waves. However, the main and most intractable reason lies in the excessive after-vibration of the transmitting sensor. Specifically, usually, the two electrodes of the transmitting sensor are not connected. After mechanical energy is converted into electrical energy, it is stored in the sensor capacitor in the form of electric field energy and is converted into mechanical energy in the subsequent process in the way of the inverse piezoelectric effect, cycling repeatedly, and cannot be directly consumed in the form of electrical energy. If the positive and negative electrodes of the transmitting sensor are directly short-circuited, the electrical energy generated on the transmitting sensor will directly drive the inductor on the transmitting sensor, corresponding to mechanical kinetic energy, and is directly converted into the mechanical kinetic energy of the transmitting sensor, cycling repeatedly, and also cannot be directly consumed in the form of electrical energy. Summary of the Invention

[0005] Based on the above description, the present invention provides a short-sequence acoustic wave generating component and a wave train measuring instrument. By setting an energy recovery unit, the energy stored in the transmitting sensor is recovered in the positive half-cycle and / or negative half-cycle of the vibration of the transmitting sensor by consuming electrical energy, forcing the acoustic wave transmitting sensor to stop vibrating quickly, so as to greatly shorten the length of the acoustic wave train emitted by the transmitting sensor, avoid the overlap of the late-arriving wave and the second half of the early-arriving wave, and improve the measurement effect of the full-wave train measurement of acoustic waves.

[0006] The technical solution of the present invention to solve the above technical problems is as follows: A short-sequence acoustic wave generation component and a wave train measuring instrument, including a power supply unit, an excitation unit, an acoustic wave transmitting unit, and an energy recovery unit; the acoustic wave transmitting unit includes a transmitting sensor X1; the input end of the excitation unit is connected to the power supply unit, and the output end is connected to the transmitting sensor, for exciting the transmitting sensor to vibrate so as to emit acoustic waves; the energy recovery unit is connected to the transmitting sensor, for consuming the electric energy stored in the transmitting sensor during the vibration of the transmitting sensor.

[0007] On the basis of the above technical solution, the present invention can also be improved as follows.

[0008] Further, the energy recovery unit includes a positive half-cycle recovery unit, for recovering electric energy during the positive half-cycle of the vibration of the transmitting sensor X1.

[0009] Further, the positive half-cycle recovery unit includes a mutual inductor T2, a switching tube Q2, and a diode D3;

[0010] The positive pole of the primary side of the mutual inductor T2 is connected to the positive pole of the transmitting sensor X1; the negative pole of the primary side of the mutual inductor T2 is connected to one end of the switching tube Q2, and the other end of the switching tube Q2 is grounded, and the gate of the switching tube Q2 is the control end;

[0011] The positive pole of the secondary side of the mutual inductor T2 is connected to the negative pole of the diode D3, and the positive pole of the diode D3 is grounded; the negative pole of the secondary side of the mutual inductor T2 is connected to the output end of the power supply unit.

[0012] Further, the energy recovery unit includes a negative half-cycle recovery unit, for recovering electric energy during the negative half-cycle of the vibration of the transmitting sensor X1.

[0013] Further, the negative half-cycle recovery unit includes a transformer T3, a switching tube Q3, and a diode D4;

[0014] The positive pole of the primary side of the transformer T3 is connected to the positive pole of the transmitting sensor X1; the negative pole of the primary side of the transformer T3 is connected to one end of the switching tube Q3, and the other end of the switching tube Q3 is grounded, and the gate of the switching tube Q3 is the control end;

[0015] The positive pole of the secondary side of the transformer T3 is connected to the output end of the power supply unit; the negative pole of the secondary side of the transformer T3 is connected to the negative pole of the diode D4, and the positive pole of the diode D4 is grounded.

[0016] Further, the excitation unit includes a mutual inductor T1, a switching tube Q1, and a diode D2;

[0017] The positive terminal of the primary side of the mutual inductor T1 is connected to the output terminal of the power supply unit; the negative terminal of the primary side of the mutual inductor T1 is connected to one end of the switching transistor Q1, and the other end of the switching transistor Q1 is grounded, and the gate of the switching transistor Q1 is the control terminal;

[0018] After the secondary side of the mutual inductor T1 and the diode D2 are connected in series, the positive terminal is grounded, and the negative terminal is connected to the positive terminal of the emission sensor X1.

[0019] Further, the excitation unit further includes a switching transistor Q4; the positive terminal of the secondary side of the mutual inductor T1 is connected to one end of the PMOS transistor Q4, and the other end of the switching transistor Q4 is grounded; the negative terminal of the secondary side of the mutual inductor T1 is connected to the positive terminal of the diode D2, and the negative terminal of the diode D2 is connected to the positive terminal of the emission sensor X1.

[0020] Further, the acoustic wave emission unit further includes a current limiting resistor R1; the current limiting resistor R1 is connected in series with the emission sensor X1.

[0021] Further, the power supply unit includes a power receiving terminal P1, a diode D1, and a filter capacitor C1; the positive terminal of the diode D1 is connected to the power receiving terminal P1, the negative terminal is connected to the positive terminal of the filter capacitor C1, and is connected to the output terminal of the power supply unit; the negative terminal of the filter capacitor C1 is grounded.

[0022] The present application also proposes a short sequence acoustic wave train measurement instrument, including a transmitting device and a receiving device that are adapted to each other, and the transmitting device includes the short sequence acoustic wave generating component described in any one of the above.

[0023] Compared with the prior art, the technical solution of the present application has the following beneficial technical effects:

[0024] 1. By setting an energy recovery unit, the energy stored in the emission sensor is recovered in the positive half cycle and / or negative half cycle of the vibration of the emission sensor by consuming electric energy, forcing the acoustic wave emission sensor to quickly stop vibrating, so that the length of the acoustic wave train emitted by the emission sensor is greatly shortened, avoiding the overlap of the latter wave and the latter half of the first wave, and improving the measurement effect of the full acoustic wave train measurement;

[0025] 2. By replacing the transformer in the existing excitation unit with a mutual inductor, the instantaneous excitation of the emission sensor is realized, further shortening the vibration time of the emission sensor, and thus further shortening the emission wave train length of the emission sensor. Description of the Drawings

[0026] Figure 1 It is a schematic structural diagram of a short sequence acoustic wave generating component provided by an embodiment of the present invention;

[0027] Figure 2 This is a schematic structural diagram of the short - sequence acoustic wave generating component in the first embodiment of the present invention;

[0028] Figure 3 This is a schematic structural diagram of the short - sequence acoustic wave generating component in the second embodiment of the present invention;

[0029] Figure 4 This is a schematic structural diagram of the short - sequence acoustic wave generating component in the third embodiment of the present invention;

[0030] Figure 5 This is a schematic structural diagram of the short - sequence acoustic wave generating component in the fourth embodiment of the present invention;

[0031] In the drawings, the list of components represented by each reference numeral is as follows:

[0032] 1. Power supply unit; 2. Excitation unit; 3. Power transmission unit; 4. Energy recovery unit; 41. Negative - half - cycle recovery unit; 42. Negative - half - cycle recovery unit. Detailed implementation manners

[0033] To facilitate the understanding of this application, the following will describe this application more comprehensively with reference to the relevant drawings. Embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of this application more thorough and comprehensive.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the description of this application herein are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0035] As used herein, the singular forms "a", "an" and "the" may also include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "include" or "have" and the like specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0036] Embodiment 1

[0037] A short-sequence acoustic wave generating component includes a power supply unit 1, an excitation unit 2, an acoustic wave transmitting unit 3, and an energy recovery unit 4. The energy recovery unit 4 consumes the energy of the acoustic wave transmitting unit 3 in the form of electric energy, so that the energy of the acoustic wave transmitting unit 3 is quickly consumed, shortening the emission wave train length of the acoustic wave transmitting unit 3. The power supply unit 1, the excitation unit 2, the acoustic wave transmitting unit 3, and the energy recovery unit 4 can be of various forms, which are not limited here.

[0038] Among them, the power supply unit 1 includes an electric energy receiving terminal P1, a diode D1, and a filter capacitor C1. The positive electrode of the diode D1 is connected to the electric energy receiving terminal P1, and the negative electrode serves as the output terminal of the power supply unit 1. And the positive electrode of the filter capacitor C1 is connected to the negative electrode of the diode D1, and the negative electrode is grounded for filtering.

[0039] The acoustic wave transmitting unit 3 includes a transmitting sensor X1, and the negative electrode of the transmitting sensor X1 is grounded. After the transmitting sensor X1 receives electric energy, it starts to vibrate due to the inverse piezoelectric effect, and continuously converts energy between electric energy and mechanical energy to form oscillations, and emits an acoustic wave train.

[0040] In this embodiment, as Figure 2 shown, the excitation unit 2 only includes a switching transistor Q1, and in this embodiment, the switching transistor Q1 is a PMOS transistor. The source electrode of the switching transistor Q1 is connected to the output terminal of the power supply unit 1, and the drain electrode is connected to the positive electrode of the transmitting sensor X1, and the gate electrode is connected to the control terminal P2. By controlling the on / off of the switching transistor Q1 through the control terminal P2, it is controlled whether the power supply unit 1 supplies power to the transmitting sensor X1 to excite the transmitting sensor X1 to emit acoustic waves.

[0041] The energy recovery unit 4 includes a resistor R2. One end of the resistor R2 is connected to the positive electrode of the transmitting sensor X1, and the other end is grounded. By converting electric energy into heat energy, the energy stored in the transmitting sensor X1 is consumed, forcing the acoustic wave transmitting sensor X1 to stop vibrating quickly, so that the length of the acoustic wave train emitted by the transmitting sensor X1 is greatly shortened, avoiding the overlap of the later arrival wave and the second half of the first arrival wave, and improving the measurement effect of the full acoustic wave train measurement.

[0042] Embodiment 2

[0043] The difference between this embodiment and Embodiment 1 is that, as Figure 3 shown, in this embodiment, the excitation unit 2 includes a transformer T1 and a switching transistor Q1, and the switching transistor Q1 in this embodiment is an NMOS transistor. The positive electrode of the primary side of the transformer T1 is connected to the output terminal of the power supply unit. The negative electrode of the primary side of the transformer T1 is connected to the drain electrode of the switching transistor Q1, and the source electrode of the switching transistor Q1 is grounded, and the gate electrode of the switching transistor Q1 is connected to the control terminal P2. The positive electrode of the secondary side of the transformer T1 is connected to the positive electrode of the transmitting sensor X1, and the negative electrode is grounded.

[0044] When the switch Q1 is turned on by controlling the control terminal P2, the primary side of the transformer T1 is energized, thereby exciting the emission sensor X1 through the secondary side of the transformer T2.

[0045] In addition, the energy recovery unit 4 includes a positive half-cycle recovery unit 41. The positive half-cycle recovery unit 41 includes a mutual inductor T2, a switch Q2, and a diode D3. The switch Q2 in this embodiment is an NMOS transistor. The positive pole of the primary side of the mutual inductor T2 is connected to the positive pole of the emission sensor X1. The negative pole of the primary side of the mutual inductor T2 is connected to the drain of the switch Q2, and the source of the switch Q2 is grounded. The gate of the switch Q2 is connected to the control terminal P2. The positive pole of the secondary side of the mutual inductor T2 is connected to the negative pole of the diode D3, and the positive pole of the diode D3 is grounded. The negative pole of the secondary side of the mutual inductor T2 is connected to the output terminal of the power supply unit 1.

[0046] When the vibration of the emission sensor X1 is in the positive half-cycle, the switch Q2 is turned on by controlling the control terminal P3. At this time, the energy in the emission sensor X1 is transferred to the primary winding of the mutual inductor T2 in the form of electric energy, and after the switch Q2 is turned off by controlling the control terminal P3, the energy is released through the secondary side of the mutual inductor T2, thereby realizing the consumption of energy.

[0047] The energy recovery unit 4 of the first embodiment consumes the energy stored in the emission sensor X1 by converting electric energy into heat energy, forcing the acoustic wave emission sensor X1 to stop vibrating quickly. The energy recovery unit 4 of the second embodiment transfers the energy in the emission sensor X1 to the primary winding of the mutual inductor T2 in the form of electric energy, and after the switch Q2 is turned off by controlling the control terminal P3, the energy is released through the secondary side of the mutual inductor T2, thereby realizing the consumption of energy.

[0048] Therefore, whether it is quickly consumed in the form of electric energy, or the energy on the emission sensor X1 is transferred, or other structures that can quickly dissipate the energy on the emission sensor X1 are within the protection scope of the present invention.

[0049] Embodiment Three

[0050] The difference between this embodiment and the second embodiment is that, as Figure 4 shown, in this embodiment, the excitation unit 2 includes a mutual inductor T1, a switch Q1, and a diode D2. In addition, the energy recovery unit 4 of the present application further includes a positive half-cycle recovery unit 41 and a negative half-cycle recovery unit 42. The positive half-cycle recovery unit 41 includes a mutual inductor T2, a switch Q2, and a diode D3. The negative half-cycle recovery unit 42 includes a mutual inductor T3, a switch Q3, and a diode D4.

[0051] In this embodiment, the switching transistors Q1, Q2, and Q3 are all IGBTs. Compared with MOS transistors, IGBTs have a higher breakdown voltage, a larger operating current, are voltage-resistant, and are more convenient to control.

[0052] The positive pole of the primary side of the mutual inductor T1 is connected to the output terminal of the power supply unit. The negative pole of the primary side of the mutual inductor T1 is connected to the emitter of the switching transistor Q1, and the collector of the switching transistor Q1 is grounded. The gate of the switching transistor Q1 is connected to the control terminal P2. After the secondary side of the mutual inductor T1 is connected in series with the diode D2, the positive pole is grounded, and the negative pole is connected to the positive pole of the emission sensor X1.

[0053] After the switching transistor is turned on by controlling the terminal P2, the electric energy from the power supply unit 1 is stored in the primary winding of the mutual inductor T1. After the switching transistor Q1 is turned off by controlling the terminal P2, the electric energy in the primary winding of the mutual inductor T1 is instantaneously released through the secondary side of the mutual inductor T1, thereby instantaneously exciting the emission sensor.

[0054] The positive pole of the primary side of the mutual inductor T2 is connected to the positive pole of the emission sensor X1. The negative pole of the primary side of the mutual inductor T2 is connected to the emitter of the switching transistor Q2, and the collector of the switching transistor Q2 is grounded. The gate of the switching transistor Q2 is connected to the control terminal P2. The positive pole of the secondary side of the mutual inductor T2 is connected to the negative pole of the diode D3, and the positive pole of the diode D3 is grounded. The negative pole of the secondary side of the mutual inductor T2 is connected to the output terminal of the power supply unit 1.

[0055] When the vibration of the emission sensor X1 is in the positive half cycle, the switching transistor Q2 is turned on by controlling the terminal P3. At this time, the energy in the emission sensor X1 is transferred to the primary winding of the mutual inductor T2 in the form of electric energy, and after the switching transistor Q2 is turned off by controlling the terminal P3, the energy is released through the secondary side of the mutual inductor T2, thereby realizing the consumption of energy.

[0056] The positive pole of the primary side of the mutual inductor T3 is connected to the negative pole of the emission sensor X1. The negative pole of the primary side of the mutual inductor T3 is connected to the emitter of the switching transistor Q3, and the collector of the switching transistor Q3 is grounded. The gate of the switching transistor Q3 is connected to the control terminal P6. The positive pole of the secondary side of the mutual inductor T3 is connected to the negative pole of the diode D3, and the positive pole of the diode D3 is grounded. The negative pole of the secondary side of the mutual inductor T3 is connected to the output terminal of the power supply unit 1.

[0057] When the vibration of the emission sensor X1 is in the negative half cycle, the switching transistor Q3 is turned on by controlling the terminal P6. At this time, the energy in the emission sensor X1 is transferred to the primary winding of the mutual inductor T3 in the form of electric energy, and after the switching transistor Q3 is turned off by controlling the terminal P6, the energy is released through the secondary side of the mutual inductor T3, so that the consumption of energy can also be realized in the negative half cycle of the vibration of the emission sensor X1, and further shortening the emission wave train length of the emission sensor X1.

[0058] Correspondingly, the acoustic wave emitting unit 3 of the present application further includes a diode D5 and a diode D6. The negative electrode of the transmitting sensor X1 is grounded through the diode D5. Specifically, the positive electrode of the diode D5 is grounded, and the negative electrode is connected to the negative electrode of the transmitting sensor X1. The positive electrode of the diode D6 is grounded, and the negative electrode is connected to the positive electrode of the transmitting sensor X1. By providing the diodes D5 and D6, it is ensured that current can pass through the positive and negative half-cycle recovery unit 41 or the negative half-cycle recovery unit 42 during the positive and negative half-cycles of the vibration of the transmitting sensor X1.

[0059] In addition, in this embodiment, by replacing the transformer in the existing excitation unit 2 with a mutual inductor T1, the instantaneous excitation of the transmitting sensor X1 is realized, further shortening the vibration time of the transmitting sensor X1, and thus further shortening the emission wave train length of the transmitting sensor X1.

[0060] Embodiment 4

[0061] The difference between this embodiment and Embodiment 3 is that, as Figure 5 shown, in this embodiment, the excitation unit further includes a switching tube Q4, and in this embodiment, the switching tube Q4 is a PMOS tube. The positive electrode of the secondary side of the mutual inductor T1 is connected to the drain of the switching tube Q4, and the source of the switching tube Q4 is grounded, and the gate of the switching tube Q4 is connected to the control terminal P7. The negative electrode of the secondary side of the mutual inductor T1 is connected to the positive electrode of the diode D2, and the negative electrode of the diode D2 is connected to the positive electrode of the transmitting sensor X1.

[0062] By controlling the switching tube Q4 to turn on or off through the control terminal P7, together with the diode D2, it is possible to prevent the current from flowing reversely on the secondary side of the mutual inductor T1, and it can be ensured that before turning off the switching tube Q3, the energy is stored in the primary winding of the mutual inductor T1 and is not released through the secondary side.

[0063] In addition, the negative half-cycle recovery unit 42 of this embodiment includes a transformer T3, a switching tube Q3, and a diode D4. The switching tube Q3 in this embodiment is a PMOS tube. The positive electrode of the primary side of the transformer T3 is connected to the positive electrode of the transmitting sensor X1. The negative electrode of the primary side of the transformer T3 is connected to the drain of the switching tube Q3, and the source of the switching tube Q3 is grounded, and the gate of the switching tube Q3 is connected to the control terminal P6. The positive electrode of the secondary side of the transformer T3 is connected to the output terminal of the power supply unit 1. The negative electrode of the secondary side of the transformer T3 is connected to the negative electrode of the diode D4, and the positive electrode of the diode D4 is grounded.

[0064] Since most of the energy of the transmitting sensor X1 has been consumed by the positive half-cycle recovery unit 41, there is no need to worry about excessive instantaneous current or voltage. Therefore, during the negative half-cycle of the vibration of the transmitting sensor X1, the PMOS tube Q3 can be controlled to turn on through the control terminal P7, so that the energy of the transmitting sensor X1 can be gradually released and consumed continuously through the secondary side of the transformer T3.

[0065] The acoustic wave transmitting unit 3 of this embodiment includes a current limiting resistor R1, and the current limiting resistor R1 is connected in series with the transmitting sensor X1.

[0066] Embodiment Five

[0067] A short sequence acoustic wave train measuring instrument includes a transmitting device and a receiving device that are adapted to each other, and the transmitting device includes the short sequence acoustic wave generating component described in any one of the above embodiments.

[0068] Since the acoustic wave train emitted by the transmitting device is shorter, it can avoid the overlap of the later arriving wave and the second half of the earlier arriving wave received by the receiving device, thereby improving the measurement effect of the full acoustic wave train measurement.

[0069] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A short sequence acoustic wave generating component, characterized in that It includes a power supply unit (1), an excitation unit (2), an acoustic wave emitting unit (3) and an energy recovery unit (4); the acoustic wave emitting unit (3) includes an emission sensor X1; the input end of the excitation unit (2) is connected to the power supply unit (1), and the output end is connected to the emission sensor X1, for exciting the emission sensor X1 to vibrate so as to emit acoustic waves; the energy recovery unit (4) is connected to the emission sensor X1, and is used for consuming the electric energy stored in the emission sensor X1 during the vibration of the emission sensor X1.

2. The short-sequence acoustic wave generating component according to claim 1, characterized in that The energy recovery unit (4) includes a positive half-cycle recovery unit (41), which is used for recovering electric energy during the positive half-cycle of the vibration of the emission sensor X1.

3. The short sequence acoustic wave generating component according to claim 2, characterized in that The positive half-cycle recovery unit (41) includes a mutual inductor T2, a switching tube Q2 and a diode D3; The positive pole of the primary side of the mutual inductor T2 is connected to the positive pole of the emission sensor X1; the negative pole of the primary side of the mutual inductor T2 is connected to one end of the switching tube Q2, and the other end of the switching tube Q2 is grounded, and the grid of the switching tube Q2 is the control end; The positive pole of the secondary side of the mutual inductor T2 is connected to the negative pole of the diode D3, and the positive pole of the diode D3 is grounded; the negative pole of the secondary side of the mutual inductor T2 is connected to the output end of the power supply unit (1).

4. A short-sequence acoustic wave generating component according to claim 1, characterized in that The energy recovery unit (4) includes a negative half-cycle recovery unit (42), which is used for recovering electric energy during the negative half-cycle of the vibration of the emission sensor X1.

5. The short sequence acoustic wave generating component according to claim 4, wherein The negative half-cycle recovery unit (42) includes a transformer T3, a switching tube Q3 and a diode D4; The positive pole of the primary side of the transformer T3 is connected to the positive pole of the emission sensor X1; the negative pole of the primary side of the transformer T3 is connected to one end of the switching tube Q3, and the other end of the switching tube Q3 is grounded, and the grid of the switching tube Q3 is the control end; The positive pole of the secondary side of the transformer T3 is connected to the output end of the power supply unit (1); the negative pole of the secondary side of the transformer T3 is connected to the negative pole of the diode D4, and the positive pole of the diode D4 is grounded.

6. The short-sequence acoustic wave generating component according to claim 1, wherein The excitation unit (2) includes a mutual inductor T1, a switching tube Q1 and a diode D2; The positive pole of the primary side of the mutual inductor T1 is connected to the output end of the power supply unit (1); the negative pole of the primary side of the mutual inductor T1 is connected to one end of the switching tube Q1, and the other end of the switching tube Q1 is grounded, and the grid of the switching tube Q1 is the control end; After the secondary side of the mutual inductor T1 and the diode D2 are connected in series, the positive pole is grounded, and the negative pole is connected to the positive pole of the emission sensor X1.

7. A short-sequence acoustic wave generating component according to claim 6, characterized in that, The excitation unit (2) further includes a switching tube Q4; the positive pole of the secondary side of the mutual inductor T1 is connected to one end of the switching tube Q4, and the other end of the switching tube Q4 is grounded; the negative pole of the secondary side of the mutual inductor T1 is connected to the positive pole of the diode D2, and the negative pole of the diode D2 is connected to the positive pole of the emission sensor X1.

8. A short-sequence acoustic wave generating component according to claim 1, characterized in that, The acoustic wave emitting unit (3) further includes a current limiting resistor R1; the current limiting resistor R1 is connected in series with the emission sensor X1.

9. A short sequence acoustic wave generating component according to claim 1, characterized in that, The power supply unit (1) includes a power receiving terminal P1, a diode D1, and a filter capacitor C1; the positive electrode of the diode D1 is connected to the power receiving terminal P1, the negative electrode is connected to the positive electrode of the filter capacitor C1, and is connected to the output terminal of the power supply unit (1); the negative electrode of the filter capacitor C1 is grounded.

10. A short sequence acoustic wave train measuring instrument, characterized in that, It includes a transmitting device and a receiving device that are adapted to each other, and the transmitting device includes a short sequence acoustic wave generating component as described in any one of claims 1 to 9.

Images