CN220508348U - Air pipeline leak detector - Google Patents
Air pipeline leak detector Download PDFInfo
- Publication number
- CN220508348U CN220508348U CN202321855163.9U CN202321855163U CN220508348U CN 220508348 U CN220508348 U CN 220508348U CN 202321855163 U CN202321855163 U CN 202321855163U CN 220508348 U CN220508348 U CN 220508348U
- Authority
- CN
- China
- Prior art keywords
- circuit
- signal
- amplifying circuit
- filtering
- amplifying
- 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
- 238000001514 detection method Methods 0.000 claims abstract description 41
- 238000012545 processing Methods 0.000 claims abstract description 28
- 238000001914 filtration Methods 0.000 claims description 60
- 239000003990 capacitor Substances 0.000 claims description 24
- 230000035945 sensitivity Effects 0.000 claims description 18
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 230000006854 communication Effects 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 6
- 230000007175 bidirectional communication Effects 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000003137 locomotive effect Effects 0.000 description 5
- 230000005236 sound signal Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 2
- 210000005069 ears Anatomy 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Examining Or Testing Airtightness (AREA)
Abstract
The utility model discloses an air pipeline leakage detector, and belongs to the field of gas leakage measuring instruments and meters. The pipeline leakage point detection device comprises a vibration sensor, an ultrasonic sensor and a signal processing circuit, wherein the vibration sensor and the ultrasonic sensor are used for detecting the pipeline leakage point, the signal processing circuit is electrically connected with the vibration sensor and the ultrasonic sensor, and the signal processing circuit comprises a vibration signal processing circuit and an ultrasonic signal processing circuit. The air pipeline leakage detector integrates the air leakage vibration detection mode and the air leakage ultrasonic detection mode, detects whether the air pipe joint leaks air or not through the air leakage ultrasonic detection mode and the air leakage vibration detection mode, and solves the problem that the existing detection mode is single and inaccurate in detection result is easy to cause.
Description
Technical Field
The utility model belongs to the field of gas leakage measuring instruments and meters, and particularly relates to an air pipeline leakage detector.
Background
At present, for the detection of air pipeline gas leakage, two types of manual detection and instrument are mainly available, and the manual detection needs professional detection personnel, and the detection personnel need to have corresponding experience and technology. And the instrument detection does not need professional detection personnel.
At present, an ultrasonic detection instrument is generally adopted in the field for detection, and the ultrasonic detection instrument converts ultrasonic signals (sound of gas flowing through a leakage hole) which cannot be heard by human ears into low-frequency audio signals which can be heard by human ears by using a heterodyne technology and simultaneously displays the low-frequency audio signals on a liquid crystal screen, so that leakage detection is realized.
In the railway transportation field, the electric locomotive gradually replaces the fuel locomotive, and after production or when put into use, the electric locomotive needs to use the airtight of gas leakage detection instrument to detect air duct joint, and then judges whether air duct joint has the phenomenon of gas leakage, and current air duct joint detects and adopts ultrasonic detection instrument, and ultrasonic detection instrument has only an ultrasonic detection mode, and the detection mode is more single, appears the inaccurate problem of testing result easily.
Disclosure of Invention
The utility model aims to provide an air pipeline leakage detector integrating two detection modes.
In order to solve the problems, the utility model adopts the following technical scheme:
the utility model provides an air line leak hunting appearance, includes vibration sensor and the ultrasonic sensor that is used for detecting pipeline leak source, and with vibration sensor and ultrasonic sensor electric connection's signal processing circuit, signal processing circuit includes vibration signal processing circuit and ultrasonic signal processing circuit.
Further, the vibration signal processing circuit comprises a first signal filtering and amplifying circuit connected with the vibration sensor, an audio driving output circuit, an MCU circuit, a display circuit and an audio circuit, the ultrasonic signal processing circuit comprises a second signal filtering and amplifying circuit connected with the ultrasonic sensor, the MCU circuit, the display circuit and the audio circuit, the input end of the MCU circuit is connected with the first signal filtering and amplifying circuit and the second signal filtering and amplifying circuit, the output of the MCU circuit is connected with the display circuit and the audio circuit, the leakage signal detected by the vibration sensor is processed by the first signal filtering and amplifying circuit and then is input into the MCU, the leakage signal detected by the ultrasonic sensor is processed by the second signal filtering and amplifying circuit and then is input into the MCU, and the leakage signal is displayed and driven by the audio circuit to output the leakage point audio signal.
Furthermore, the input end of the audio driving output circuit is connected with the output end of the first signal filtering and amplifying circuit, the leakage signal detected by the vibration sensor is filtered and amplified by the first signal filtering and amplifying circuit and then is input into the audio driving output circuit, and the leakage signal is amplified by the audio driving output circuit and then is output.
Still further, the signal processing circuit also comprises a wireless communication circuit, and the wireless communication circuit is in bidirectional communication connection with the MCU circuit.
Preferably, the first input end of the signal filtering and amplifying circuit and the second input end of the signal filtering and amplifying circuit are connected with a sensitivity adjusting potentiometer, and the sensitivity adjusting potentiometer is used for adjusting the sensitivity of detection.
Preferably, the sensitivity adjusting potentiometer is a duplex potentiometer, and two potentiometers of the duplex potentiometer are respectively connected with the input end of the first signal filtering and amplifying circuit and the input end of the second signal filtering and amplifying circuit.
Preferably, the first signal filtering and amplifying circuit comprises a buffer amplifier circuit connected with the MCU circuit and a signal filtering and amplifying circuit for filtering and amplifying the vibration signal, wherein the buffer amplifier circuit mainly comprises an operational amplifier U3B, the vibration signal is directly input into the MCU circuit through the operational amplifier U3B, the signal filtering and amplifying circuit comprises resistors R51-R53, resistors R55-R60, resistors R64-R65, resistors R51-R53, resistor R73, resistor R77, potentiometer VR5, potentiometer VR6, capacitor C30, capacitor C33, capacitor C35-C37, triode Q5 and triode Q6, the resistor R77 and the potentiometer VR5 are connected in series and then are connected between a power supply VBAT1 and the ground to form a first-stage amplifying circuit, the resistors R51-R53, R55 and the triode Q5 form a second-stage amplifying and filtering circuit, the signal is coupled into the second-stage amplifying circuit through the capacitor C33 after being subjected to sensitivity adjustment, and then enters the second-stage amplifying circuit through the capacitor C30 and is coupled into the second-stage amplifying circuit after being subjected to coupling.
Preferably, the audio driving output circuit comprises an audio power amplifier chip U20, a peripheral element resistor R63 and capacitors C38-C41.
Preferably, the second signal filtering and amplifying circuit includes a sensitivity adjusting circuit composed of a resistor R7, a resistor R10 and a potentiometer VR2, a multistage band-pass filtering circuit composed of operational amplifiers U1C to U1D, operational amplifiers U2A to U2D, operational amplifier U3A and peripheral capacitance resistors thereof, a resistance-capacitance filtering circuit composed of a resistor R22 and a capacitor C17, a buffer amplifier circuit composed of operational amplifier U1B, and an amplifying circuit mainly composed of operational amplifier U3D and a triode Q4.
The beneficial effects of adopting above-mentioned technical scheme to produce lie in:
the air pipeline leakage detector integrates an air leakage vibration detection mode and an air leakage ultrasonic detection mode, detects whether air leakage exists in an air pipe joint of an electric locomotive through an ultrasonic sensor, carries out filtering amplification processing on an air leakage sound wave signal, then transmits the air leakage sound wave signal to a processor, and transmits data to a display screen through the processor, if the air leakage size is displayed on the air leakage display screen, the air leakage size is convenient for a detector to visually check, and simultaneously sends out an audio signal, so that the detector can conveniently confirm the air leakage condition; if the ultrasonic sensor fails to detect air leakage, the vibration sensor detects whether the air leakage exists in the air pipe joint of the electric locomotive again, the vibration sensor transmits detected air leakage vibration signals to the processor for display, and meanwhile, the vibration signals are output to the audio driving output circuit for audio output after being filtered and amplified, so that whether the air leakage exists is judged. The utility model detects whether the air pipe joint leaks air or not by two detection modes, namely the air leakage ultrasonic detection and the air leakage vibration detection, and solves the problem that the existing detection mode is single and the detection result is inaccurate easily.
Drawings
FIG. 1 is a schematic block diagram of an air line leak detector of the present utility model;
FIG. 2 is a schematic diagram of a first signal filtering and amplifying circuit and an audio driving output circuit according to the present utility model;
FIG. 3 is a schematic diagram of a signal filtering and amplifying circuit according to the present utility model;
FIG. 4 is a schematic circuit diagram of an MCU of the present utility model;
fig. 5 is a schematic diagram of an audio circuit of the present utility model.
Detailed Description
In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to specific embodiments of the present utility model and corresponding drawings. It is apparent that the described embodiments of the utility model are only some, but not all embodiments of the utility model. Accordingly, the following detailed description of the embodiments is not intended to limit the scope of the utility model, but is to be construed as providing those skilled in the art with the benefit of the teachings presented herein; all other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.
The utility model relates to an air pipeline leakage detector integrating an air leakage vibration detection mode and an air leakage ultrasonic detection mode, which comprises a vibration sensor, an ultrasonic sensor and a signal processing circuit, wherein the vibration sensor and the ultrasonic sensor are used for detecting leakage points of a pipeline, and the signal processing circuit is electrically connected with the vibration sensor and the ultrasonic sensor and comprises a vibration signal processing circuit and an ultrasonic signal processing circuit.
As shown in fig. 1, the vibration signal processing circuit includes a first signal filtering and amplifying circuit connected with the vibration sensor, an audio driving output circuit, an MCU circuit, a display circuit and an audio circuit, the ultrasonic signal processing circuit includes a second signal filtering and amplifying circuit connected with the ultrasonic sensor, the MCU circuit, the display circuit and the audio circuit are connected with the input end of the MCU circuit, the output of the MCU circuit is connected with the display circuit and the audio circuit, the leakage signal detected by the vibration sensor is processed by the first signal filtering and amplifying circuit and then input into the MCU, the leakage signal detected by the ultrasonic sensor is processed by the second signal filtering and amplifying circuit and then input into the MCU, and the leakage signal detected by the ultrasonic sensor is processed by the MCU and then displayed and driven by the audio circuit to output the leakage point audio signal. The input end of the audio driving output circuit is connected with the output end of the first signal filtering and amplifying circuit, the leakage signal detected by the vibration sensor is filtered and amplified by the first signal filtering and amplifying circuit and then is input into the audio driving output circuit, and the leakage signal is amplified by the audio driving output circuit and then is output.
In order to realize the real-time uploading and storage of the detection data of the leak detector and the instant detection by issuing a command through the server, the signal processing circuit further comprises a wireless communication circuit, and the wireless communication circuit is in bidirectional communication connection with the MCU circuit.
For the utility model, in order to provide measurement accuracy and sensitivity conveniently, the input end of the first signal filtering and amplifying circuit and the input end of the second signal filtering and amplifying circuit are connected with a sensitivity adjusting potentiometer, and the sensitivity adjusting potentiometer is used for adjusting the sensitivity of detection. In order to facilitate operation and reduce the volume of the device, the sensitivity adjustment potentiometer is a duplex potentiometer, and the two potentiometers of the duplex potentiometer are respectively connected with the input end of the first signal filtering and amplifying circuit and the input end of the second signal filtering and amplifying circuit.
As shown in FIG. 2, the first signal filtering and amplifying circuit comprises a buffer amplifier circuit connected with the MCU circuit and a signal filtering and amplifying circuit for filtering and amplifying vibration signals, wherein the buffer amplifier circuit mainly comprises an operational amplifier U3B, the vibration signals are directly input into the MCU circuit through the operational amplifier U3B, the signal filtering and amplifying circuit comprises resistors R51-R53, resistors R55-R60, resistors R64-R65, resistors R51-R53, resistor R73, resistor R77, potentiometer VR5, potentiometer VR6, capacitor C30, capacitor C33, capacitor C35-C37, triode Q5 and triode Q6, the resistors R77 and the potentiometer VR5 are connected in series and then are connected between a power supply VBAT1 and the ground to form a first-stage amplifying circuit, the resistors R51-R53, R55 and the triode Q5 form a second-stage amplifying circuit, the resistors R56-R60, the resistors R73, the potentiometer VR6, the capacitor C35-C36 and the triode Q6 form a second-stage amplifying circuit, the signals are coupled through the capacitor C30, and then enter the capacitor C33 after being coupled through the second-stage amplifying circuit, and are coupled through the capacitor C30.
Because of the complexity of the field detection environment, in order to facilitate the accurate judgment of detection personnel without missing electric leakage, the utility model also increases the audio drive output circuit, wherein the audio drive output circuit comprises an audio power amplifier chip U20, a peripheral element resistor R63 and capacitors C38-C41 thereof, and the audio drive output circuit is externally connected with an earphone, thus being capable of preventing the influence of the external environment, further being capable of accurately detecting without missing tiny leakage points.
As shown in fig. 3, the second signal filtering and amplifying circuit includes a sensitivity adjusting circuit composed of a resistor R7, a resistor R10, and a potentiometer VR2, a multistage band-pass filtering circuit composed of operational amplifiers U1C to U1D, operational amplifiers U2A to U2D, operational amplifier U3A, and peripheral capacitance resistors thereof, a resistance-capacitance filtering circuit composed of a resistor R22 and a capacitor C17, a buffer amplifier circuit composed of operational amplifier U1B, and an amplifying circuit mainly composed of operational amplifier U3D and a triode Q4.
As shown in fig. 4, the MCU circuit includes an ARM microcontroller chip U17 and its peripheral circuits.
As shown in fig. 5, the audio circuit includes a resistor R36, a resistor R42, a transistor Q7, a voltage regulator D7, and a buzzer BZ1, where the beep signal output by the MCU drives the transistor Q7 to be turned on through the resistor R36, so as to drive the buzzer BZ1 to sound, and the voltage regulator D7 is used to protect the buzzer BZ1.
The foregoing has described in detail an air line leak detector in accordance with the embodiments of the present application, wherein specific examples are provided herein to illustrate the principles and embodiments of the present application, and wherein the above examples are provided only to assist in understanding the methods and core ideas of the present application; meanwhile, as those skilled in the art will have modifications in the specific embodiments and application scope in accordance with the ideas of the present application, the present description should not be construed as limiting the present application in view of the above.
Claims (9)
1. An air line leak detector which is characterized in that: the pipeline leakage point detection device comprises a vibration sensor, an ultrasonic sensor and a signal processing circuit, wherein the vibration sensor and the ultrasonic sensor are used for detecting the pipeline leakage point, the signal processing circuit is electrically connected with the vibration sensor and the ultrasonic sensor, and the signal processing circuit comprises a vibration signal processing circuit and an ultrasonic signal processing circuit.
2. An air line leak detector as defined in claim 1, wherein: the vibration signal processing circuit comprises a first signal filtering and amplifying circuit connected with the vibration sensor, an audio driving output circuit, an MCU circuit, a display circuit and an audio circuit, wherein the ultrasonic signal processing circuit comprises a second signal filtering and amplifying circuit connected with the ultrasonic sensor, the MCU circuit, the display circuit and the audio circuit, the input end of the MCU circuit is connected with the first signal filtering and amplifying circuit and the second signal filtering and amplifying circuit, the output end of the MCU circuit is connected with the display circuit and the audio circuit, the leakage signal detected by the vibration sensor is processed by the first signal filtering and amplifying circuit and then is input into the MCU, the leakage signal detected by the ultrasonic sensor is processed by the second signal filtering and amplifying circuit and then is input into the MCU, and the leakage signal is displayed and driven by the audio circuit to output.
3. An air line leak detector as defined in claim 2, wherein: the input end of the audio driving output circuit is connected with the output end of the first signal filtering and amplifying circuit, the leakage signal detected by the vibration sensor is filtered and amplified by the first signal filtering and amplifying circuit and then is input into the audio driving output circuit, and the leakage signal is amplified by the audio driving output circuit and then is output.
4. An air line leak detector as defined in claim 3, wherein: the signal processing circuit also comprises a wireless communication circuit, and the wireless communication circuit is in bidirectional communication connection with the MCU circuit.
5. An air line leak detector according to any one of claims 2-4, wherein: the first input end of the signal filtering and amplifying circuit and the second input end of the signal filtering and amplifying circuit are connected with a sensitivity adjusting potentiometer, and the sensitivity adjusting potentiometer is used for adjusting the sensitivity of detection.
6. An air line leak detector as defined in claim 5, wherein: the sensitivity adjusting potentiometer is a duplex potentiometer, and the two potentiometers of the duplex potentiometer are respectively connected with the input end of the first signal filtering and amplifying circuit and the input end of the second signal filtering and amplifying circuit.
7. An air line leak detector as defined in claim 5, wherein: the first signal filtering and amplifying circuit comprises a buffer amplifier circuit connected with the MCU circuit and a signal filtering and amplifying circuit for filtering and amplifying vibration signals, wherein the buffer amplifier circuit mainly comprises an operational amplifier U3B, the vibration signals are directly input into the MCU circuit through the operational amplifier U3B, the signal filtering and amplifying circuit comprises resistors R51-R53, resistors R55-R60, resistors R64-R65, resistors R51-R53, resistor R73, resistor R77, potentiometer VR5, potentiometer VR6, a capacitor C30, a capacitor C33, a capacitor C35-C37, a triode Q5 and a triode Q6, the resistor R77 and the potentiometer VR5 are connected in series and then are connected between a power supply VBAT1 and the ground to form a first-stage amplifying circuit, the resistors R56-R60, the resistor R73, the potentiometer VR6, the capacitor C35-C36 and the triode Q6 form a second-stage filtering circuit, the vibration signals are subjected to sensitivity adjustment, and then are coupled into the second-stage amplifying circuit through the capacitor C30, and then are coupled into the second-stage amplifying circuit through the capacitor C37.
8. An air line leak detector as defined in claim 5, wherein: the audio driving output circuit comprises an audio power amplifier chip U20, a peripheral element resistor R63 and capacitors C38-C41.
9. An air line leak detector as defined in claim 5, wherein: the second signal filtering and amplifying circuit comprises a sensitivity adjusting circuit composed of a resistor R7, a resistor R10 and a potentiometer VR2, a multistage band-pass filtering circuit composed of operational amplifiers U1C-U1D, operational amplifiers U2A-U2D, operational amplifier U3A and peripheral capacitance resistors thereof, a resistance-capacitance filtering circuit composed of a resistor R22 and a capacitor C17, a buffer amplifier circuit composed of an operational amplifier U1B and an amplifying circuit mainly composed of an operational amplifier U3D and a triode Q4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321855163.9U CN220508348U (en) | 2023-07-14 | 2023-07-14 | Air pipeline leak detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321855163.9U CN220508348U (en) | 2023-07-14 | 2023-07-14 | Air pipeline leak detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220508348U true CN220508348U (en) | 2024-02-20 |
Family
ID=89868645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321855163.9U Active CN220508348U (en) | 2023-07-14 | 2023-07-14 | Air pipeline leak detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220508348U (en) |
-
2023
- 2023-07-14 CN CN202321855163.9U patent/CN220508348U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102619562B (en) | Instrument for monitoring gas emission quantity in roadway | |
| US3028450A (en) | Gas leak detection apparatus | |
| CN101710030A (en) | System and method for testing performance of cross flow fan | |
| CN107328528A (en) | A kind of ultrasonic wave air tightness detection system and method based on multisensor | |
| CN105136404A (en) | Voiceprint detection system | |
| CN101403635A (en) | Infrasonic wave detection apparatus | |
| CN220508348U (en) | Air pipeline leak detector | |
| CN108007531B (en) | Echo signal processing circuit of ultrasonic level meter | |
| CN201671805U (en) | Tangential fan performance testing device | |
| CN106645590B (en) | Gas concentration measuring device based on differential acquisition | |
| CN202974379U (en) | Temperature and liquid level integrated transmitter | |
| CN212515015U (en) | Ultrasonic distance measuring sensor | |
| CN203949753U (en) | A kind of vacuum pressure valve automatic Verification proving installation | |
| CN206057428U (en) | A kind of digital galvanometer for microwave waveguide measuring system | |
| CN203883778U (en) | Amplification module for detected signals in substation gas concentration detection system | |
| CN203883774U (en) | Module for amplifying signals in transformer substation gas concentration detection system | |
| CN203101329U (en) | Device for detecting oxides inside stainless steel tube by single sensor | |
| CN219796941U (en) | Pipeline leakage sound wave detection device | |
| CN104748940A (en) | Portable online flow resistance tester | |
| CN216668906U (en) | Liquid tank liquid level detection alarm circuit | |
| CN205049313U (en) | Portable online flow resistance tester | |
| CN206696147U (en) | A kind of integral control circuit and dust detector | |
| CN217237121U (en) | Supercharger sealing performance detection device based on pressure measurement | |
| CN205538571U (en) | Particulate matter concentration measurement system in low concentration particulate matter online test appearance | |
| CN104038161A (en) | Module for amplifying signals in gas concentration detection system of transformer substation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |