CN110145300B - Double-channel sound transmitter suitable for oil well pressure measurement and circuit thereof - Google Patents
Double-channel sound transmitter suitable for oil well pressure measurement and circuit thereof Download PDFInfo
- Publication number
- CN110145300B CN110145300B CN201910460809.5A CN201910460809A CN110145300B CN 110145300 B CN110145300 B CN 110145300B CN 201910460809 A CN201910460809 A CN 201910460809A CN 110145300 B CN110145300 B CN 110145300B
- Authority
- CN
- China
- Prior art keywords
- port
- circuit
- grounded
- chip
- capacitor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003129 oil well Substances 0.000 title claims abstract description 15
- 238000009530 blood pressure measurement Methods 0.000 title claims abstract description 14
- 230000003321 amplification Effects 0.000 claims abstract description 12
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 12
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 239000003990 capacitor Substances 0.000 claims description 48
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 38
- 239000000919 ceramic Substances 0.000 claims description 37
- 229910052802 copper Inorganic materials 0.000 claims description 32
- 239000010949 copper Substances 0.000 claims description 32
- 239000004814 polyurethane Substances 0.000 claims description 6
- 229920002635 polyurethane Polymers 0.000 claims description 6
- 238000005538 encapsulation Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 230000009977 dual effect Effects 0.000 claims 6
- 239000007788 liquid Substances 0.000 abstract description 15
- 230000008878 coupling Effects 0.000 abstract description 7
- 238000010168 coupling process Methods 0.000 abstract description 7
- 238000005859 coupling reaction Methods 0.000 abstract description 7
- 238000012544 monitoring process Methods 0.000 abstract description 5
- 230000035945 sensitivity Effects 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 15
- 238000001914 filtration Methods 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000001228 spectrum Methods 0.000 description 4
- 239000002775 capsule Substances 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002592 echocardiography Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
- E21B47/14—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geophysics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Acoustics & Sound (AREA)
- Remote Sensing (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a double-channel sound transmitter suitable for oil well pressure measurement and a circuit thereof. The circuit transmitting part inputs voltages of +/-5V to +/-36V, directly outputs standard coupling echo 0-5V voltage signals used for calculating sound velocity and liquid level echo 0-5V voltage signals used for calculating liquid level depth, can directly perform AD conversion, realizes amplification of weak signals, is high in sensitivity, reduces the size of the transmitter, facilitates underground measurement, and meets monitoring conditions under more working conditions.
Description
Technical Field
The invention belongs to the field of oil well formation pressure measurement, and relates to a dual-channel sound transmitter suitable for oil well pressure measurement and a circuit thereof.
Background
At present, when the formation pressure of an oil well is tested, a storage type pressure gauge measuring mode is generally adopted. The method needs to open the combination of the oil well pipe, the rod and the column for each test, has a long test period of about 15 days, has high test cost and affects the yield. Therefore, a method for testing the formation pressure by using the echo is proposed, but a sound transmitter for testing the echo is not available in the market at present, and becomes a key technical problem for testing the formation pressure by using an echo method. Generally, an acoustic sensor manufactured by a piezoelectric effect does not have the capability of processing an acoustic signal, the acoustic signal is processed by software mostly, the sensor signal is directly acquired, a useful signal is acquired, meanwhile, a useless noise signal is easily brought in, the signal spectrum is filtered by the software, the signal spectrum is expanded to an infinite range, the spectrum aliasing is easily generated, the signal spectrum is distorted at the moment, and the design of a filter has no significance. This would not facilitate the extraction of the sound speed data in the collar wave signal. Meanwhile, because the liquid surface wave is reflected by the liquid surface at the bottom of the well, the signal is weak, and the signal is easily buried in noise and cannot be accurately identified, so that the test result cannot be analyzed and the test fails.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provide a dual-channel sound transmitter and a circuit thereof, wherein the sound transmitter is suitable for measuring the formation pressure of an oil well, and the sound transmitter realizes the self-adaptive amplification and filtering of weak echo signals and outputs 0-5V standard voltage signals so as to meet the requirement of testing the formation pressure by an echo method.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
a double-channel sound transmitter circuit suitable for oil well pressure measurement is arranged on a circuit board of a transmitter and comprises a power supply circuit, a voltage following circuit, a charge amplifying circuit and a low-pass filter circuit;
the output end of the power circuit is connected with the output ends of other circuits, and the power circuit outputs +/-5V- +/-36V voltage; the output end of the voltage following circuit is connected to the input end of the charge amplifying circuit; the output end of the charge amplifying circuit is connected to the input end of the low-pass filter circuit;
the low-pass filter circuit comprises two self-adaptive low-pass filter circuits with cut-off frequencies of 100Hz and 10 Hz;
the 100Hz low-pass filter circuit comprises a filter chip U4, wherein an IN port of the filter chip U4 is connected with an OUT port of a charge amplifier chip U3; the NC port of the filter chip U4 is grounded, the V-port and the NC port are grounded after being connected, the VCC port is connected with +5V voltage and is grounded through a capacitor C10, the GND port is grounded through a capacitor C9, and the CLK port is grounded after sequentially passing through a resistor R7 and a VPULSE module; cutoff frequency F of filter chip U4cutoff＝Fclk/50，FclkIs 5 KHz;
the 10Hz low-pass filter circuit comprises a filter chip U5, wherein an IN port of the filter chip U5 is connected with an OUT port of a charge amplifier chip U3; the NC port of the filter chip U5 is grounded, the V-port and the NC port are grounded after being connected, the VCC port is connected with +5V voltage and is grounded through a capacitor C12, the GND port is grounded through a capacitor C11, and the CLK port is grounded after sequentially passing through a resistor R7 and a VPULSE module; cutoff frequency F of filter chip U5cutoff＝Fclk/50，FclkIs 500 Hz.
Preferably, the voltage follower circuit includes an external terminal P2 and a voltage follower chip U2; the port 1 of the external terminal P2 is grounded, the port 2 is connected to the + IN1 port of the voltage follower chip U2 after passing through one end of the resistor R1, and the other end of the resistor R1 is grounded; the V-port of the voltage follower chip U2 is connected to a voltage of-5V and to ground through a capacitor C5; the VCC port of the voltage follower chip U2 is connected to +5V voltage and is grounded through a capacitor C4; the OUT1 port of the voltage follower chip U2 is connected with the-IN 1 port and then connected to the input end of the charge amplification circuit.
Further, the output end of the voltage follower circuit is connected to an IN + port of the charge amplifier chip U3 after sequentially passing through a resistor R2, one end of a capacitor C6, the cathode of a diode D1 and the anode of a diode D2; the IN-port of the charge amplifier chip U3 is grounded after sequentially passing through the cathode of the diode D2, the anode of the diode D1, the other end of the capacitor C6 and the resistor R3; the anode of the diode D2 is connected with-5V voltage through the diode D4, and the cathode of the diode D4 is connected with the anode of the diode D2; the cathode of the diode D2 is connected with +5V voltage through the diode D3, and the anode of the diode D3 is connected with the cathode of the diode D2.
Further, a cathode of the TVS diode D5 is connected between the port 2 of the external terminal P2 and the resistor R1, and an anode of the TVS diode D5 is grounded.
Preferably, the charge amplification circuit includes a potentiometer R4 and a charge amplifier chip U3; the output end of the voltage follower circuit is connected with an IN + port of the charge amplifier chip U3, an IN-port of the charge amplifier chip U3 is grounded, a V-port is connected with-5V voltage and is grounded through a capacitor C7; the RG1 port is connected with the RG2 port through a potentiometer R4; the VCC port is grounded through a capacitor C8; the OUT port of the charge amplifier chip U3 is connected to the input of the low pass filter circuit.
Further, the VCC port of the charge amplifier chip U3 is connected to the capacitor C8 through the resistor R5, the resistor R5 is grounded through the resistor R6, and the REF port of the charge amplifier chip U3 is grounded through the capacitor C8.
Preferably, the potentiometer R4 is a digital programmable potentiometer.
Preferably, the power circuit includes a terminal P1 and a power conversion chip U1; the port 1 of the terminal P1 is grounded, and the port 2 is connected to the power conversion chip U1 via one end of the capacitor C1
The other end of the capacitor C1 is grounded; the CAP + port of the power conversion chip U1 is connected with the CAP-port through a capacitor C2; the GND port is connected to ground and the OUT port is connected through a capacitor C3.
A double-channel sound transmitter suitable for oil well pressure measurement is based on any one circuit, and comprises a positive electrode copper seat, a first piezoelectric ceramic ring, a second piezoelectric ceramic ring and a negative electrode copper seat which are sequentially arranged;
a through hole is formed in the center of the negative copper seat, the center of the positive copper seat extends outwards and extends out of the through hole of the negative copper seat, and the extending part and the through hole are arranged in a sealing mode; the positive electrode copper seat, the first piezoelectric ceramic ring, the second piezoelectric ceramic ring and the negative electrode copper seat are arranged at intervals through insulating gaskets to form a hollow cavity inside;
the inner side of the first piezoelectric ceramic ring is connected with the anode copper seat through a wire, the outer side of the first piezoelectric ceramic ring is connected with the inner side of the second piezoelectric ceramic ring, and the outer side of the second piezoelectric ceramic ring is connected with the cathode copper seat through a wire;
the positive copper seat and the negative copper seat are both connected with a circuit board through leads.
Preferably, the first piezoelectric ceramic ring and the second piezoelectric ceramic ring are wrapped with polyurethane encapsulation.
Compared with the prior art, the invention has the following beneficial effects:
the sound transmitter of the invention directly outputs standard 0-5V voltage signals by integrating an amplifying and filtering circuit, is convenient for users to directly carry out AD conversion to obtain a side test result, can filter the amplified signals by designing a 100Hz low-pass filtering circuit and a 10Hz low-pass filtering circuit to obtain 0-100Hz broadband sound waves and 0-10Hz low-frequency sound waves, can realize self-adaptive amplification and double-channel filtering of weak signals according to the quality of echo signals, the broadband sound waves are used for collecting coupling waves and calculating sound velocity, the low-frequency sound waves are used for collecting liquid level echoes and calculating liquid level depth to obtain useful coupling wave signals for calculating sound velocity and useful liquid level wave signals for calculating liquid level depth, further can accurately measure the height of a liquid column under the well to obtain bottom hole pressure, and directly carries out double-channel independent filtering on the coupling wave signals and the liquid level wave signals, the coupling wave signal without any interference and the clearer liquid surface wave signal can be obtained, calculation on underground pressure is very facilitated, and the stability and the precision of a testing instrument can be further improved; meanwhile, the size of the transmitter is reduced, underground measurement is facilitated, and monitoring conditions under more working conditions are met.
Furthermore, by setting the digital programmable potentiometer R4, the function of adjusting the amplification factor is realized, and more monitoring requirements are met.
Further, a clamp protection circuit is designed to protect the charge amplifier chip U3 and prevent the burn-out.
Further, the voltage divider circuit formed by the resistor R5 and the resistor R6 can convert the amplified positive and negative bipolar voltage signals into positive voltage signals.
The transducer of the invention adopts a two-stage piezoelectric ceramic ring series structure design, the piezoelectric ceramics adopt an annular design and are connected in series, the sound monitoring sensitivity is improved, the resonant frequency is 27-31KHz, the electrostatic capacitance is 7000pF, the electromechanical coupling coefficient is 0.35, the sensitivity is 190 +/-1.5 db when 20HZ is reached, and the high-sensitivity monitoring is realized.
Furthermore, the piezoelectric ceramic is externally plated with polyurethane for packaging, so that the sensitivity is high, the piezoelectric ceramic has certain pressure bearing capacity and corrosion resistance, the piezoelectric ceramic can be better applied to an oil well with relatively high casing pressure and corrosive gas, the highest pressure bearing capacity is 10MPa, the underground pressure for measurement reaches 0-20MPa, and the requirement of low-pressure well testing in oil field production is completely met.
Drawings
FIG. 1 is a schematic diagram showing the relationship between circuits according to the present invention;
FIG. 2 is a schematic diagram of a power supply circuit of the present invention;
FIG. 3 is a schematic diagram of a voltage follower circuit according to the present invention;
FIG. 4 is a schematic diagram of a charge amplification circuit according to the present invention;
FIG. 5 is a schematic diagram of a 100Hz low pass filter circuit of the present invention;
FIG. 6 is a schematic diagram of a 10Hz low pass filter circuit of the present invention;
fig. 7 is a schematic view of the sound transmitter of the present invention.
Wherein: 1-polyurethane packaging; 2.1-a first piezoceramic ring; 2.2-a second piezoceramic ring; 3-an insulating spacer; 4-positive electrode copper seat; 5-negative electrode copper seat; 6-circuit capsule; 7-circuit board.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
as shown in FIG. 1, the circuit of the present invention includes a power circuit, a voltage follower circuit, a charge amplifier circuit, a 100Hz low-pass filter circuit and a 10Hz low-pass filter circuit.
As shown in FIG. 2, the power circuit outputs voltages of + -5V- + -36V, in this embodimentThe preferred output is + -5V voltage; the power supply circuit is used for supplying power to other circuits and comprises a terminal P1 and a power supply conversion chip U1; the port 1 of the terminal P1 is grounded, and the port 2 is connected to the power conversion chip U1 via one end of the capacitor C1
The other end of the capacitor C1 is grounded; the CAP + port of the power conversion chip U1 is connected with the CAP-port through a capacitor C2; the GND port is connected to ground and the OUT port is connected through a capacitor C3.
As shown in fig. 3, the voltage follower circuit includes an external terminal P2, a TVS diode D5, and a voltage follower chip U2; the positive copper seat 4 and the negative copper seat 5 are connected to a terminal P2 through conducting wires, a port 1 of an external terminal P2 is grounded, a port 2 sequentially passes through one end of a TVS diode D5 and one end of a resistor R1 and then is connected to a + IN1 port of a voltage follower chip U2, the other end of the TVS diode D5 and the other end of the resistor R1 are grounded, and considering that an initial pulse sound signal is large when a dynamic liquid level test is carried out, the TVS diode D5 is used for protecting the voltage follower chip U2 from being burnt; the V-port of the voltage follower chip U2 is connected to a voltage of-5V and to ground through a capacitor C5; the VCC port of the voltage follower chip U2 is connected to +5V voltage and is grounded through a capacitor C4; the OUT1 port of the voltage follower chip U2 is connected with the-IN 1 port and then is connected to the input end of the charge amplifying circuit; the voltage following design is realized, and the purpose is to improve the signal input impedance of the circuit board 7 and ensure that the echo signal heard by the piezoelectric ceramic is not distorted.
As shown in fig. 4, the charge amplification circuit includes a potentiometer R4 and a charge amplifier chip U3; the potentiometer R4 is a digital programmable potentiometer, and can adaptively adjust the amplification factor.
The output end of the voltage follower circuit is connected with an IN + port of the charge amplifier chip U3, an IN-port of the charge amplifier chip U3 is grounded, a V-port is connected with-5V voltage and is grounded through a capacitor C7; the RG1 port is connected with the RG2 port through a potentiometer R4, and the amplification factor can be adjusted through the potentiometer R4, wherein the amplification factor K is 10000/R4; the VCC port is grounded through a capacitor C8; the OUT port of the charge amplifier chip U3 is connected to the input of the low pass filter circuit.
The output end of the voltage following circuit is connected to an IN + port of the charge amplifier chip U3 after sequentially passing through a resistor R2, one end of a capacitor C6, the cathode of a diode D1 and the anode of a diode D2; the IN-port of the charge amplifier chip U3 is grounded after sequentially passing through the cathode of the diode D2, the anode of the diode D1, the other end of the capacitor C6 and the resistor R3; the anode of the diode D2 is connected with-5V voltage through the diode D4, and the cathode of the diode D4 is connected with the anode of the diode D2; the cathode of the diode D2 is connected with +5V voltage through a diode D3, and the anode of the diode D3 is connected with the cathode of a diode D2; and a clamping protection circuit is formed to protect the charge amplifier chip U3 from being burnt.
The VCC port of the charge amplifier chip U3 is connected with a capacitor C8 through a resistor R5, the resistor R5 is grounded through a resistor R6, and the REF end of the charge amplifier chip U3 is grounded through a capacitor C8; the voltage divider circuit composed of the resistor R5 and the resistor R6 can convert the amplified positive and negative bipolar voltage signals into positive voltage signals.
As shown IN fig. 5, the 100Hz low pass filter circuit includes a filter chip U4, the filter chip U4 is an 8-order digital elliptic filter chip, and the IN port of the filter chip U4 is connected to the OUT port of the charge amplifier chip U3; the NC port of the filter chip U4 is grounded, the V-port and the NC port are grounded after being connected, the VCC port is connected with +5V voltage and is grounded through a capacitor C10, the GND port is grounded through a capacitor C9, and the CLK port is grounded after sequentially passing through a resistor R7 and a VPULSE module; the cut-off frequency of the filter chip U4 is mainly controlled by the clock signal input from the CLK port of the filter chip U4, and is cut off to the frequency Fcutoff＝Fclk/50，FclkIs 5 KHz; selecting FclkThe frequency is a 5KHz clock signal, and the purpose is to realize 100Hz low-pass filtering on the audible echo signal and identify the coupling wave waveform of the dynamic liquid level test; the OUT port of the filter chip U4 outputs filtered signals, the frequency range is 0-100Hz, and the output voltage range is 0-5V. The CLK port input frequency of the filter chip U4 can be controlled and input by the single chip microcomputer, and the filtering cut-off frequency can be adjusted in a self-adaptive mode.
As shown in FIG. 6, the 10Hz low-pass filter circuit comprises a filter chip U5, and the filter chip U5 is an 8-order digital elliptic filterThe IN port of the filter chip U5 is connected with the OUT port of the charge amplifier chip U3; the NC port of the filter chip U5 is grounded, the V-port and the NC port are grounded after being connected, the VCC port is connected with +5V voltage and is grounded through a capacitor C12, the GND port is grounded through a capacitor C11, and the CLK port is grounded after sequentially passing through a resistor R7 and a VPULSE module; the cut-off frequency of the filter chip U5 is mainly controlled by the clock signal input from the CLK port of the filter chip U5, and is cut off to the frequency Fcutoff＝Fclk/50，FclkIs 500 Hz; selecting FclkThe signal is a 500Hz clock signal, and aims to realize 10Hz low-pass filtering on the audible echo signal and identify the liquid surface wave waveform of the liquid level test; the OUT port of the filter chip U5 outputs filtered signals, the frequency range is 0-10Hz, and the output voltage range is 0-5V. The CLK port input frequency of the filter chip U5 can be controlled and input by the single chip microcomputer, and the filtering cut-off frequency can be adjusted in a self-adaptive mode.
The device comprises a positive electrode copper seat 4, a first piezoelectric ceramic ring 2.1, a second piezoelectric ceramic ring 2.2 and a negative electrode copper seat 5 which are sequentially arranged as shown in figure 7;
the center of the negative copper seat 5 is provided with a through hole, the center of the positive copper seat 4 extends outwards and extends out of the through hole of the negative copper seat 5, and the extending part and the through hole are sealed by high-pressure high-viscosity epoxy resin glue, so that the negative copper seat has the effects of water resistance, high temperature resistance, corrosion resistance and high pressure bearing; the positive electrode copper seat 4, the first piezoelectric ceramic ring 2.1, the second piezoelectric ceramic ring 2.2 and the negative electrode copper seat 5 are arranged at intervals through the insulating gasket 3 to form a hollow cavity inside;
the inner side of the first piezoelectric ceramic ring 2.1 is connected with the anode copper seat 4 through a lead, the outer side of the first piezoelectric ceramic ring is connected with the inner side of the second piezoelectric ceramic ring 2.2, and the outer side of the second piezoelectric ceramic ring 2.2 is connected with the cathode copper seat 5 through a lead;
the positive copper seat 4 and the negative copper seat 5 are both connected with a circuit board 7 through leads, and a circuit diaphragm capsule 6 is arranged outside the circuit board 7.
The outer sides of the first piezoelectric ceramic ring 2.1 and the second piezoelectric ceramic ring 2.2 are wrapped with polyurethane packages 1, and the polyurethane packages 1 are used as protective sleeves of the piezoelectric ceramic rings.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (8)
1. A double-channel sound transmitter circuit suitable for oil well pressure measurement is characterized in that the circuit is arranged on a circuit board (7) of a transmitter and comprises a power supply circuit, a voltage following circuit, a charge amplifying circuit and a low-pass filter circuit;
the output end of the power circuit is connected with the output ends of other circuits, and the power circuit outputs voltages of +/-5V to +/-36V; the output end of the voltage following circuit is connected to the input end of the charge amplifying circuit; the output end of the charge amplifying circuit is connected to the input end of the low-pass filter circuit;
the low-pass filter circuit comprises two self-adaptive low-pass filter circuits with cut-off frequencies of 100Hz and 10 Hz;
the 100Hz low-pass filter circuit comprises a filter chip U4, wherein an IN port of the filter chip U4 is connected with an OUT port of a charge amplifier chip U3; the NC port of the filter chip U4 is grounded, the V-port and the NC port are grounded after being connected, the VCC port is connected with +5V voltage and is grounded through a capacitor C10, the GND port is grounded through a capacitor C9, and the CLK port is grounded after sequentially passing through a resistor R7 and a VPULSE module; cutoff frequency F of filter chip U4cutoff=Fclk/50，FclkIs 5 KHz;
the 10Hz low-pass filter circuit comprises a filter chip U5, wherein an IN port of the filter chip U5 is connected with an OUT port of a charge amplifier chip U3; the NC port of the filter chip U5 is grounded, the V-port and the NC port are grounded after being connected, the VCC port is connected with +5V voltage and is grounded through a capacitor C12, the GND port is grounded through a capacitor C11, and the CLK port is grounded after sequentially passing through a resistor R7 and a VPULSE module; cutoff frequency F of filter chip U5cutoff=Fclk/50，FclkIs 500 Hz;
the voltage follower circuit includes an external terminal P2 and a voltage follower chip U2; the port 1 of the external terminal P2 is grounded, the port 2 is connected to the + IN1 port of the voltage follower chip U2 after passing through one end of the resistor R1, and the other end of the resistor R1 is grounded; the V-port of the voltage follower chip U2 is connected to a voltage of-5V and to ground through a capacitor C5; the VCC port of the voltage follower chip U2 is connected to +5V voltage and is grounded through a capacitor C4; the OUT1 port of the voltage follower chip U2 is connected with the-IN 1 port and then is connected to the input end of the charge amplifying circuit;
the output end of the voltage following circuit is connected to an IN + port of the charge amplifier chip U3 after sequentially passing through a resistor R2, one end of a capacitor C6, the cathode of a diode D1 and the anode of a diode D2; the IN-port of the charge amplifier chip U3 is grounded after sequentially passing through the cathode of the diode D2, the anode of the diode D1, the other end of the capacitor C6 and the resistor R3; the anode of the diode D2 is connected with-5V voltage through the diode D4, and the cathode of the diode D4 is connected with the anode of the diode D2; the cathode of the diode D2 is connected with +5V voltage through the diode D3, and the anode of the diode D3 is connected with the cathode of the diode D2
2. The dual channel sound transmitter circuit for oil well pressure measurement according to claim 1, wherein a negative electrode of a TVS diode D5 is connected between the port 2 of the external terminal P2 and the resistor R1, and a positive electrode of the TVS diode D5 is grounded.
3. The dual channel acoustic transducer circuit for well manometry of claim 1, wherein the charge amplification circuit comprises a potentiometer R4 and a charge amplifier chip U3; the output end of the voltage follower circuit is connected with an IN + port of the charge amplifier chip U3, an IN-port of the charge amplifier chip U3 is grounded, a V-port is connected with-5V voltage and is grounded through a capacitor C7; the RG1 port is connected with the RG2 port through a potentiometer R4; the VCC port is grounded through a capacitor C8; the OUT port of the charge amplifier chip U3 is connected to the input of the low pass filter circuit.
4. The dual channel sound transmitter circuit suitable for oil well pressure measurement according to claim 3, wherein the VCC port of the charge amplifier chip U3 is connected with the capacitor C8 through the resistor R5, the resistor R5 is grounded through the resistor R6, and the REF end of the charge amplifier chip U3 is grounded through the capacitor C8.
5. The dual channel acoustic transducer circuit for well pressure measurement according to claim 3, wherein the potentiometer R4 is a digital programmable potentiometer.
6. The dual channel acoustic transducer circuit for well pressure measurement according to claim 1, wherein the power circuit comprises terminal P1 and power conversion chip U1; the port 1 of the terminal P1 is grounded, the port 2 is respectively connected with the SD (-minus) port and the VCC port of the power conversion chip U1 after passing through one end of the capacitor C1, and the other end of the capacitor C1 is grounded; the CAP + port of the power conversion chip U1 is connected with the CAP-port through a capacitor C2; the GND port is connected to ground and the OUT port is connected through a capacitor C3.
7. A double-channel sound transmitter suitable for oil well pressure measurement is based on the circuit of any one of claims 1 to 6 and is characterized by comprising a positive copper seat (4), a first piezoelectric ceramic ring (2.1), a second piezoelectric ceramic ring (2.2) and a negative copper seat (5) which are arranged in sequence;
a through hole is formed in the center of the negative copper seat (5), the center of the positive copper seat (4) extends outwards and extends out of the through hole of the negative copper seat (5), and the extending part and the through hole are arranged in a sealing mode; the positive electrode copper seat (4), the first piezoelectric ceramic ring (2.1), the second piezoelectric ceramic ring (2.2) and the negative electrode copper seat (5) are arranged at intervals through the insulating gasket (3) to form a cavity with a hollow interior;
the inner side of the first piezoelectric ceramic ring (2.1) is connected with the anode copper seat (4) through a lead, the outer side of the first piezoelectric ceramic ring is connected with the inner side of the second piezoelectric ceramic ring (2.2), and the outer side of the second piezoelectric ceramic ring (2.2) is connected with the cathode copper seat (5) through a lead;
the positive copper seat (4) and the negative copper seat (5) are both connected with a circuit board (7) through leads.
8. The dual channel sound transmitter for well pressure measurement according to claim 7, characterized in that the first piezo-ceramic ring (2.1) and the second piezo-ceramic ring (2.2) are surrounded by a polyurethane encapsulation (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910460809.5A CN110145300B (en) | 2019-05-30 | 2019-05-30 | Double-channel sound transmitter suitable for oil well pressure measurement and circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910460809.5A CN110145300B (en) | 2019-05-30 | 2019-05-30 | Double-channel sound transmitter suitable for oil well pressure measurement and circuit thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110145300A CN110145300A (en) | 2019-08-20 |
| CN110145300B true CN110145300B (en) | 2022-03-01 |
Family
ID=67593477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910460809.5A Active CN110145300B (en) | 2019-05-30 | 2019-05-30 | Double-channel sound transmitter suitable for oil well pressure measurement and circuit thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110145300B (en) |
Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1034646A (en) * | 1988-01-25 | 1989-08-09 | 内燃机及测量技术有限公司Avl公司 | Charge amplifier circuit |
| US5220836A (en) * | 1989-04-27 | 1993-06-22 | AVL Gesellschaft fur Verbrennungskraftmaschinen und Messtechnick mbH., Prof.Dr.Dr.h.c. Hans List | Method and arrangement for piezoelectric measurement |
| CN2702325Y (en) * | 2003-10-23 | 2005-05-25 | 黄世矩 | Full-automatic high resolution ratio formation lithology scanner |
| CN200949463Y (en) * | 2006-08-16 | 2007-09-19 | 北京恒兴利达仪器有限公司 | Explosion-proof dynamic fluid level depth and casing pressure automatic testing system |
| CN201043463Y (en) * | 2007-06-09 | 2008-04-02 | 中国石化股份胜利油田分公司河口采油厂 | Automatic detection instrument for dynamic liquid level of oil well |
| CN101162162A (en) * | 2007-11-14 | 2008-04-16 | 合肥工业大学 | Low-power consumption two-wire system vortex flowmeter |
| CN101419108A (en) * | 2008-11-29 | 2009-04-29 | 太原理工大学 | Ultrasonic cavitation pressure measuring device and measurement method thereof |
| CN201653461U (en) * | 2010-03-29 | 2010-11-24 | 潍坊奥博仪表科技发展有限公司 | VSF power circuit |
| CN201902205U (en) * | 2010-12-03 | 2011-07-20 | 贵州航天凯山石油仪器有限公司 | Phonoscope for oil and gas well liquid level depth measuring device |
| CN202031567U (en) * | 2011-01-05 | 2011-11-09 | 中国海洋石油总公司 | Circuit used for measuring annulus instantaneous flow in marine riser |
| CN203775152U (en) * | 2014-01-26 | 2014-08-13 | 杭州电子科技大学 | Self-inspection charge amplifier circuit |
| CN204836096U (en) * | 2015-07-08 | 2015-12-02 | 上海大学 | Piezoelectric acceleration sensor's charge amplifier |
| CN105156904A (en) * | 2015-09-08 | 2015-12-16 | 中国石油天然气股份有限公司 | Dynamic pressure transmitter |
| CN105323685A (en) * | 2015-06-09 | 2016-02-10 | 中国科学院声学研究所 | Full-depth low-frequency broadband highly-sensitive piezoelectric hydrophone |
| CN106415230A (en) * | 2014-01-22 | 2017-02-15 | 株式会社电装 | Fuel-pressure sensor with built-in charge amplifier |
| CN205977202U (en) * | 2016-08-25 | 2017-02-22 | 贵州航天凯山石油仪器有限公司 | Oil well dynamic fluid level tests self -adaptive circuit |
| CN108416282A (en) * | 2018-02-28 | 2018-08-17 | 西安石油大学 | A kind of underground hydrodynamic face echo-signal velocity of sound extracting method based on tubing coupling |
| CN108768310A (en) * | 2018-09-12 | 2018-11-06 | 齐鲁工业大学 | A kind of low-noise charge amplifier and its implementation for piezoelectric transducer |
| CN108758360A (en) * | 2018-06-05 | 2018-11-06 | 北京目黑科技有限公司 | A kind of infrasound sensor and electronic equipment |
| CN109560807A (en) * | 2017-09-25 | 2019-04-02 | 英飞凌科技股份有限公司 | High-voltage level shifter circuit |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2470487C (en) * | 2004-06-07 | 2009-10-20 | Dean Finnestad | Apparatus, method and system for digitally transmitting acoustic pulse gun signals |
| EP2400317A1 (en) * | 2010-06-23 | 2011-12-28 | Adam SA | Method and system for measuring radiation doses in radiotherapy treatments |
| CN202735471U (en) * | 2012-09-06 | 2013-02-13 | 山西省电力公司朔州供电分公司 | Supersonic wave signal acquisition device |
-
2019
- 2019-05-30 CN CN201910460809.5A patent/CN110145300B/en active Active
Patent Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1034646A (en) * | 1988-01-25 | 1989-08-09 | 内燃机及测量技术有限公司Avl公司 | Charge amplifier circuit |
| US5220836A (en) * | 1989-04-27 | 1993-06-22 | AVL Gesellschaft fur Verbrennungskraftmaschinen und Messtechnick mbH., Prof.Dr.Dr.h.c. Hans List | Method and arrangement for piezoelectric measurement |
| CN2702325Y (en) * | 2003-10-23 | 2005-05-25 | 黄世矩 | Full-automatic high resolution ratio formation lithology scanner |
| CN200949463Y (en) * | 2006-08-16 | 2007-09-19 | 北京恒兴利达仪器有限公司 | Explosion-proof dynamic fluid level depth and casing pressure automatic testing system |
| CN201043463Y (en) * | 2007-06-09 | 2008-04-02 | 中国石化股份胜利油田分公司河口采油厂 | Automatic detection instrument for dynamic liquid level of oil well |
| CN101162162A (en) * | 2007-11-14 | 2008-04-16 | 合肥工业大学 | Low-power consumption two-wire system vortex flowmeter |
| CN101419108A (en) * | 2008-11-29 | 2009-04-29 | 太原理工大学 | Ultrasonic cavitation pressure measuring device and measurement method thereof |
| CN201653461U (en) * | 2010-03-29 | 2010-11-24 | 潍坊奥博仪表科技发展有限公司 | VSF power circuit |
| CN201902205U (en) * | 2010-12-03 | 2011-07-20 | 贵州航天凯山石油仪器有限公司 | Phonoscope for oil and gas well liquid level depth measuring device |
| CN202031567U (en) * | 2011-01-05 | 2011-11-09 | 中国海洋石油总公司 | Circuit used for measuring annulus instantaneous flow in marine riser |
| CN106415230A (en) * | 2014-01-22 | 2017-02-15 | 株式会社电装 | Fuel-pressure sensor with built-in charge amplifier |
| CN203775152U (en) * | 2014-01-26 | 2014-08-13 | 杭州电子科技大学 | Self-inspection charge amplifier circuit |
| CN105323685A (en) * | 2015-06-09 | 2016-02-10 | 中国科学院声学研究所 | Full-depth low-frequency broadband highly-sensitive piezoelectric hydrophone |
| CN204836096U (en) * | 2015-07-08 | 2015-12-02 | 上海大学 | Piezoelectric acceleration sensor's charge amplifier |
| CN105156904A (en) * | 2015-09-08 | 2015-12-16 | 中国石油天然气股份有限公司 | Dynamic pressure transmitter |
| CN205977202U (en) * | 2016-08-25 | 2017-02-22 | 贵州航天凯山石油仪器有限公司 | Oil well dynamic fluid level tests self -adaptive circuit |
| CN109560807A (en) * | 2017-09-25 | 2019-04-02 | 英飞凌科技股份有限公司 | High-voltage level shifter circuit |
| CN108416282A (en) * | 2018-02-28 | 2018-08-17 | 西安石油大学 | A kind of underground hydrodynamic face echo-signal velocity of sound extracting method based on tubing coupling |
| CN108758360A (en) * | 2018-06-05 | 2018-11-06 | 北京目黑科技有限公司 | A kind of infrasound sensor and electronic equipment |
| CN108768310A (en) * | 2018-09-12 | 2018-11-06 | 齐鲁工业大学 | A kind of low-noise charge amplifier and its implementation for piezoelectric transducer |
Non-Patent Citations (1)
| Title |
|---|
| 综合测井系统的开发与研制;陈长兵;《中国优秀博硕士学位论文全文数据库 (硕士) 基础科学辑》;20041231(第04期);第3-6、31-36、40页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110145300A (en) | 2019-08-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO1990004318A1 (en) | Air-gap hydrophone | |
| US3713086A (en) | Hydrophone | |
| CN100371696C (en) | Piezoresistance type high-frequency dynamic high voltage sensing device | |
| CN103292947A (en) | Novel capacitance plate suspension structure of differential motion metal capacitance diaphragm capsule | |
| CN110145300B (en) | Double-channel sound transmitter suitable for oil well pressure measurement and circuit thereof | |
| CN1892248B (en) | Small static-pressure-resisting hydrophone for drag-wire array | |
| CN105627106B (en) | Infrasound sensor for gas pipeline leakage detection | |
| CN104614066B (en) | A kind of piezoelectric ceramic hydrophone of metal shell sealing | |
| GB2442026A (en) | A pressure-balanced electromechanical converter | |
| CN112146703A (en) | Temperature, pressure and acoustic integrated MEMS (micro-electromechanical systems) underwater sensor and system | |
| CN204463610U (en) | A kind of infrasonic wave apparatus for demonstrating | |
| CN208795359U (en) | Two dimension is the same as vibration shape vector hydrophone | |
| US3243767A (en) | Electroacoustic transducer for detection of low level acoustic signals over a broad frequency range | |
| CN107396239B (en) | Hydrophone and packaging technology thereof | |
| CN116086593A (en) | Sound pressure vibration speed FFT sensor based on integration of N harmonic response MEMS sensitive units and working method thereof | |
| AU562390B2 (en) | Remote calibration of acoustic transducer array | |
| JPH0643055A (en) | Capacity type pressure sensor | |
| CN101650246B (en) | Curve disk-type hydraulic pressure sensor for built-in modulation circuit | |
| CN210136010U (en) | Sensing device of underwater shock wave sensor | |
| CN112511933A (en) | Microphone | |
| JP2586421B2 (en) | Semiconductor pressure detector | |
| CN201974268U (en) | Novel isolating structure of differential metal capacitance membrane box | |
| CN112097124B (en) | Novel infrasonic wave sensor that structure is strengthened | |
| CN117425118A (en) | Low-power-consumption and low-noise capacitive MEMS microphone reading circuit | |
| CN2924985Y (en) | Low-frequency sound pressure sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |