Handheld sound pulse detector

Abstract

The utility model relates to pipeline nondestructive testing, and discloses a hand-held sound pulse detector, which is used for rapid detection and discrimination of pipeline defects, the detector is integrally provided with a detection end and a hand-held end, a detection port of the detection end is integrally provided with a condenser microphone and a micro loudspeaker, the detection port is detachably provided with a pipeline adapter, and the hand-held end is connected with the detection end and the hand-held end. A sound conducting hose is not needed; the instrument is provided with function control keys and signal indicating lamps, a single-chip microcomputer is integrated in the instrument to be connected with and control all elements, the single-chip microcomputer is integrated with a signal processing and judging module, the detection condition can be directly judged, and whether the pipeline has defects or not and defect types can be directly fed back through opening and closing of the corresponding indicating lamps. The instrument is only provided with a micro memory, a single-chip microcomputer is in wireless sensing connection with a mobile terminal, a detection signal is transmitted to the mobile terminal for cloud storage after discrimination, and the storage pressure of the instrument is reduced; the extremely simple structure and the feedback mode reduce the size of the detector, realize the integrated design of detection and discrimination in a handheld instrument, and improve the detection efficiency of the pipeline.

Description

Technical Field

[0001] The utility model relates to the technical field of nondestructive testing, in particular to a handheld acoustic pulse detector. Background Art

[0002] There are many pipes in some devices (such as condensers, heaters, etc.) of thermal power plants and nuclear power plants. During use, they are affected by factors such as temperature, pressure and medium, which will cause defects such as pipe blockage, pipe wall cracks and even perforations, seriously affecting the safe operation of the unit. In order to ensure the reliability of the equipment, these pipes must be inspected regularly. The acoustic pulse detection method has the characteristics of high efficiency, accuracy, and no constraints on the material and shape of the pipe. It has great advantages in efficiency, especially for the maintenance of in-service pipelines in large factories, which can effectively reduce the losses caused by long downtime. Conventional acoustic pulse detectors are composed of transmitters, receivers, displays, sound-conducting hoses, transmission cables and other parts. It often requires experienced inspection personnel to read the signal spectrum of the display to determine whether there are defects, and there are also disadvantages such as noise interference caused by sound-conducting hoses and transmission cables, and inconvenient operation. Based on this, the utility model is improved on the basis of the existing technology and strives to solve the above problems. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a handheld acoustic pulse detector, which is implemented as follows:

[0004] A handheld acoustic pulse detector for rapid detection and identification of pipeline defects, comprising a detector body, wherein the detector body is integrally provided with a detection end and a handheld end, wherein the detection end is provided with one or more detection ports parallel to each other, wherein a condenser microphone and a micro-speaker are integrally provided at the detection port, wherein the condenser microphone and the micro-speaker are integrated at the detection port for exciting and receiving acoustic pulse detection signals, wherein a pipeline adapter is detachably provided at the detection port, wherein the pipeline adapter can be directly plugged into a port of a pipeline to be detected;

[0005] Several function control keys and several signal indicator lights are respectively embedded on the outer side walls of the handheld terminal and the detection terminal. Pressing a specific function control key selects the function of the detection instrument for operation. Different signal indicator lights correspond to different defect types and are controlled to light up or go out.

[0006] The detector body also includes a single-chip microcomputer and a micro memory arranged inside the detection end, and the single-chip microcomputer is electrically connected to a capacitive microphone, a micro speaker, a plurality of function control keys, a plurality of signal indicator lights, and a micro memory respectively; the single-chip microcomputer is provided with a signal processing and discrimination module to process the detection signal and quickly discriminate the defect type, and quickly feedback the detection result by lighting up or extinguishing the signal indicator light;

[0007] The single chip microcomputer is connected to the mobile terminal device by wireless sensing, and the detection signal is transmitted to the mobile terminal for cloud storage after identification.

[0008] As a further improvement, a preamplifier and an A / D converter are also provided in the detection end, and the capacitive microphone is connected to the preamplifier and the A / D converter in sequence, and the received transmission echo signal is pre-processed and then transmitted to the single-chip microcomputer.

[0009] As a further improvement, a plurality of function control keys are equidistantly arranged on the handheld terminal, including a first control key, a second control key and a third control key;

[0010] The first control key controls the power on or off of the handheld acoustic pulse detector;

[0011] The second control key controls the operation of signal excitation and reception in acoustic pulse detection;

[0012] The third control key controls the storage or deletion of the defect detection signal on the handheld acoustic pulse detector.

[0013] As a further improvement, a plurality of signal indicator lights are equidistantly and indirectly arranged on the upper end surface of the detection end, including a first signal indicator light, a second signal indicator light, and a third signal indicator light;

[0014] The first signal indicator light is used to display whether the power is on or off;

[0015] The second signal indicator light and the third signal indicator light are used to display obstructive defects or penetrating defects, respectively.

[0016] As a further improvement, a buzzer alarm is also provided inside the detection end, and the buzzer alarm is electrically connected to the single chip computer, and generates an alarm when a defect is detected in the pipeline to be detected.

[0017] As a further improvement, the single chip microcomputer is provided with a signal processing and automatic identification module, which obtains a signal diagram of the calibrated pipeline having the first and last pipe section signal points as a calibration signal diagram;

[0018] During the detection, when the third abnormal signal point appears in the signal graph, the buzzer alarm sounds;

[0019] Furthermore, the defect type is automatically identified. When the phase of the signal is first positive and then negative, it is identified as a blocking signal defect and the second signal indicator light is on; when the phase of the signal is first negative and then positive, it is identified as a penetrating defect and the third signal indicator light is on; when multiple abnormal signal points appear in the signal graph, they are identified in sequence and the corresponding indicator lights are on at the same time.

[0020] As a further improvement, the handheld acoustic pulse detector is battery powered or rechargeable.

[0021] As a further improvement, anti-slip grooves are provided on the outer side wall of the handheld end.

[0022] Compared with the existing ones, this application can obtain the following technical effects:

[0023] 1. The utility model provides a handheld acoustic pulse detector, which uses a pipe adapter to directly align with the pipe to be detected, effectively reducing the length noise interference caused by the sound-conducting hose in the conventional acoustic pulse detector; and the pipe adapter can be replaced, and the pipe adapter is selected according to the inner diameter of the pipe to be detected, so that it has greater adaptability and practicality; in addition, the instrument also omits the spectrum display screen, does not need manual reading, reduces the error of experience judgment, and also reduces the weight of the instrument;

[0024] Second, the utility model adopts the setting of simple indicator lights, and the basic defects of the pipeline to be inspected can be quickly and automatically identified by observing the indicator lights; further, the signal indicator lights correspond to different defect categories on the pipeline to be inspected one by one, and the detection results are directly fed back by the opening and closing of the signal indicator lights. The detection and identification are simple and clear, and the integrated pipe bundle detection is achieved. Rapid detection effect, high detection efficiency, has great advantages for the in-service rapid detection of integrated pipe fittings.

[0025] Other features of the present invention will be described in detail in the subsequent specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the utility model examples or the prior art or the drawings required for use in the description of the prior art, a brief introduction is given. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] In the figure:

[0028] Figure 1 This is a structural schematic diagram of a handheld acoustic pulse detector of the utility model;

[0029] Figure 2 This is a structural schematic diagram of a handheld acoustic pulse detector according to another embodiment of the utility model;

[0030] Figure 3 This is a working schematic diagram of a handheld acoustic pulse detector of the utility model;

[0031] Figure 4 It is a schematic diagram of the calibration detection signal pre-stored in the single chip microcomputer of the utility model;

[0032] Figure 5 This is a schematic diagram of a detection signal determined as a penetrating defect in the utility model;

[0033] Figure 6 This is a schematic diagram of a detection signal determined as a blocking defect by the utility model;

[0034] Figure 7 This is a schematic diagram of detection signals determined by the present invention to be two types of defects.

[0035] In the figure:

[0036] 1-Handheld acoustic pulse detector;

[0037] 11-detection end, 111-micro speaker, 112-pipe adapter, 113-condenser microphone, 114-signal indicator light, 1141-first signal indicator light, 1142-second signal indicator light, 1143-third signal indicator light, 115-single chip microcomputer, 116-micro memory, 117-preamplifier, 118-A / D converter, 119-mobile terminal device;

[0038] 12-handheld terminal, 121-function control key, 1211-first function control key, 1212-second function control key, 1213-third function control key. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but only represents selected embodiments of the present invention.

[0040] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0041] Reference Figure 1 In this embodiment, a handheld acoustic pulse detector is used for rapid detection and identification of pipeline defects. The handheld acoustic pulse detector 1 includes a detector body, the detector body is integrally provided with a detection end 11 and a handheld end 12, and the detection end 11 is provided with a detection port;

[0042] In other embodiments, refer to the attached Figure 2 The detection end can be provided with multiple parallel detection ports to perform synchronous detection on adjacent pipes. Multiple detection ports correspond to an independent detection channel respectively. After the echo signals are processed respectively, the single chip microcomputer distinguishes them respectively and uniformly feeds back the discrimination results in the detection group.

[0043] Furthermore, the detection port is integrated with a condenser microphone 113 and a micro-speaker 111 for exciting and receiving sound pulse detection signals. A pipe adapter 112 is detachably arranged at the detection port. The pipe adapter 112 can be directly plugged into the port of the pipe to be detected. Compared with conventional detection probes, the utility model does not need to set a sound-conducting hose, and the structure is simpler. The pipe adapter 112 can be disassembled and replaced to adapt to pipes of different calibers to be detected.

[0044] A plurality of function control keys 121 and a plurality of signal indicator lights 114 are respectively embedded on the outer side walls of the handheld terminal 12 and the detection terminal 11. Pressing a specific function control key 121 selects a function of the handheld acoustic pulse detector 1 for operation. Different signal indicator lights 114 correspond to different defect types and are controlled to light up or go out.

[0045] The special improvement is that the detector body also includes a single-chip microcomputer 115 and a micro memory 116 arranged inside the detection end 11, and the single-chip microcomputer 115 is electrically connected to the capacitive microphone 113, the micro speaker 111, a plurality of function control keys 121, a plurality of signal indicator lights 114, and the micro memory 116 respectively; the single-chip microcomputer 115 is provided with a signal processing and discrimination module to process the detection signal and quickly discriminate the defect type, and quickly feedback the detection result by lighting up or extinguishing the signal indicator light 114; the single-chip microcomputer 115 with integrated functions is provided. Compared with the traditional detection equipment, the utility model integrates the instrument control end and the detection probe end into an integrated design, which is simple and portable.

[0046] Furthermore, a wireless transmission design is adopted, the single chip microcomputer 115 is wirelessly connected to the mobile terminal device 119, and the detection signal is transmitted to the mobile terminal for cloud storage after identification. The mobile terminal device 119 can be a mobile phone, a laptop computer, a detection instrument with a display function, and the like.

[0047] The handheld acoustic pulse detector of the utility model is only provided with a micro memory 116, and is connected by a single chip computer 115 and a mobile terminal device 119 by wireless sensing. After the detection signal is identified, the group of signals and the identification results are transmitted to the mobile terminal for cloud storage for subsequent data viewing and analysis. The characteristic of not storing data on the handheld acoustic pulse detector greatly reduces the storage pressure of the instrument; the minimalist structure further reduces the size of the detector, making it more portable. The integrated detection and identification mode improves the detection and identification efficiency, reduces the work intensity of the detection personnel, and realizes the rapid detection of the integrated pipeline.

[0048] As a further improvement, the detection end 11 is also provided with a preamplifier 117 and an A / D converter 118, and the condenser microphone 113 is connected to the preamplifier and the A / D converter in sequence, and the received transmission echo signal is pre-processed and then transmitted to the single chip microcomputer. The detection signal is amplified by the preamplifier, and the amplified signal is converted into analog-to-digital by the A / D converter.

[0049] As a further improvement, a plurality of function control keys 121 are equidistantly arranged on the handheld terminal 12, including a first control key 1211, a second control key 1212 and a third control key 1213; in other embodiments, the function control keys may be arranged at any position of the handheld acoustic pulse detector that complies with the structural design principles.

[0050] In this embodiment, the first control key controls the power on or off of the handheld acoustic pulse detector; the second control key controls the operation of signal excitation and reception in acoustic pulse detection; the third control key controls the storage or deletion of defect detection signals on the handheld acoustic pulse detector. In other embodiments, the functions and effects of the function control keys can also be adjusted and modified according to specific detection requirements.

[0051] Similarly, in this embodiment, the design of the signal lights 114 is as follows:

[0052] A plurality of signal indicator lights 114 are equidistantly and indirectly arranged on the upper end surface of the detection end 11, including a first signal indicator light 1141, a second signal indicator light 1142, and a third signal indicator light 1143;

[0053] The first signal indicator light is used to display whether the power is on or off;

[0054] The second signal indicator light and the third signal indicator light are used to display obstructive defects or penetrating defects, respectively.

[0055] In other embodiments, the layout position, indicating function, etc. of the signal indicator light may also be adjusted according to specific usage requirements or defect types.

[0056] As a further improvement, a buzzer alarm is also provided inside the detection end, and the buzzer alarm is electrically connected to the single chip computer, and generates an alarm when a defect is detected in the pipeline to be detected.

[0057] As a further improvement, refer to the attached Figure 4-7 As shown, the single chip microcomputer 115 is provided with a signal processing and automatic identification module, such as Figure 4 As shown, a signal diagram of the first and last pipe section signal points (A and B) of the calibrated pipeline is obtained as a calibration signal diagram;

[0058] During the detection, when the third abnormal signal point appears in the signal graph, the buzzer alarm sounds;

[0059] Further, automatically identify the defect type, refer to the attached Figure 6 , D2 is the signal point of the blocking signal defect, that is, when the phase of the signal is positive first and then negative, it is judged as a blocking defect, and the second signal indicator light is on; refer to the attached Figure 5 , D1 is the signal point of penetrating defect, that is, when the phase of the signal is negative first and then positive, it is judged as a penetrating defect, and the third signal indicator light is on; refer to the attached Figure 7 As shown, when multiple abnormal signal points appear in the signal diagram, they are identified in sequence and the corresponding indicator lights are lit at the same time.

[0060] In the utility model, as long as there is a defect in the pipeline, the pipeline needs to be repaired immediately. In the detection signal of the pipeline, the calibration pipeline without defects must have signal fluctuations at the head and tail ends, so the signal graph will have two abnormal signals, and the detection signal graph of the pipeline with defects will show three or more abnormal signals. Therefore, if the signal graph has more than two abnormal signals, an alarm will be issued to further distinguish the type of signal. The discrimination procedure is simple and practical, and the extremely simple discrimination method integrates the detection and discrimination functions into one. The size of the single-chip microcomputer is still small, and the weight and volume of the instrument are controlled to the maximum extent, making the handheld acoustic pulse detector more practical. The utility model greatly improves the detection efficiency.

[0061] As a further improvement, the handheld acoustic pulse detector 1 is battery-powered or rechargeable, and does not require any connecting cables, thus meeting the design requirements of portability.

[0062] As a further improvement, the outer wall of the handheld end 12 is provided with anti-slip grooves, or is designed as an ergonomic hand-grip structure, so that the detection personnel can stably grasp the handheld acoustic pulse detector during detection, reducing the possibility of detection errors caused by jitter during manual detection.

[0063] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A handheld acoustic pulse detector for rapid detection and identification of pipeline defects, comprising a detector body, wherein the detector body comprises an integrally arranged detection end and a handheld end, characterized in that: The detection end is provided with one or more detection ports parallel to each other, and a capacitive microphone and a micro speaker are integrated at the detection port for exciting and receiving the sound pulse detection signal, and a pipe adapter is detachably provided at the detection port, and the pipe adapter can be directly plugged into the port of the pipeline to be detected; A plurality of function control keys and a plurality of signal indicator lights are respectively embedded on the outer side walls of the handheld terminal and the detection terminal. The function of the detection instrument is selected and operated by pressing the function control key. Different signal indicator lights correspond to different defect types and are controlled to light up or go out. The detector body also includes a single-chip microcomputer and a micro memory arranged inside the detection end, and the single-chip microcomputer is electrically connected to a capacitive microphone, a micro speaker, a plurality of function control keys, a plurality of signal indicator lights, and a micro memory respectively; the single-chip microcomputer is provided with a signal processing and automatic discrimination module to process the detection signal and quickly discriminate the defect type, and quickly feedback the detection result by lighting up or extinguishing the signal indicator light; The single chip microcomputer is connected to the mobile terminal device by wireless sensing, and the detection signal is transmitted to the mobile terminal for cloud storage after identification.

2. A handheld acoustic pulse detector according to claim 1, characterized in that: The detection end is also provided with a preamplifier and an A / D converter, and the capacitive microphone is connected to the preamplifier and the A / D converter in sequence, and the received transmission echo signal is pre-processed and then transmitted to the single-chip microcomputer.

3. A handheld acoustic pulse detector according to claim 1, characterized in that: A plurality of function control keys are equidistantly arranged on the handheld terminal, including a first control key, a second control key and a third control key; The first control key controls the power on or off of the handheld acoustic pulse detector; The second control key controls the operation of signal excitation and reception in acoustic pulse detection; The third control key controls the storage or deletion of the defect detection signal on the handheld acoustic pulse detector.

4. A handheld acoustic pulse detector according to claim 1, characterized in that: A plurality of signal indicator lights are equidistantly and indirectly arranged on the upper end surface of the detection end, including a first signal indicator light, a second signal indicator light, and a third signal indicator light; The first signal indicator light is used to display whether the power is on or off; The second signal indicator light and the third signal indicator light are used to display obstructive defects or penetrating defects, respectively.

5. A handheld acoustic pulse detector according to claim 4, characterized in that: A buzzer alarm is also provided inside the detection end, and the buzzer alarm is electrically connected to the single chip computer, and generates an alarm when a defect is detected in the pipeline to be detected.

6. A handheld acoustic pulse detector according to claim 1, characterized in that: The handheld acoustic pulse detector is battery-powered or rechargeable.

7. A handheld acoustic pulse detector according to claim 1, characterized in that: The outer side wall of the handheld end is provided with anti-slip grooves.

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