CN106885623B - Sensing device for detecting electric appliance electrogenerated vibration - Google Patents
Sensing device for detecting electric appliance electrogenerated vibration Download PDFInfo
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- CN106885623B CN106885623B CN201710085868.XA CN201710085868A CN106885623B CN 106885623 B CN106885623 B CN 106885623B CN 201710085868 A CN201710085868 A CN 201710085868A CN 106885623 B CN106885623 B CN 106885623B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/02—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by magnetic means, e.g. reluctance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
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- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention provides a sensing device for detecting electric appliance electrogenerated vibration, comprising: the device comprises an isolation chamber, a detection sensor, a vibration conduction rod, a sleeve and a spring; the detection sensor is arranged in the isolation chamber, the vibration conduction rod is used for transmitting an electric vibration signal to the detection sensor, the front end of the vibration conduction rod extends out of the front end of the sleeve, and the spring is arranged in the sleeve and used for realizing the reciprocating motion of the vibration conduction rod. The sensing device for detecting the electric appliance electrogenerated vibration has the advantages of small volume, light weight, strong capability of resisting environmental vibration and environmental noise interference, high detection accuracy, good repeatability and high detection efficiency, can detect weak electrogenerated vibration signals of the electric appliance, can be used for detecting the vibration characteristics of narrow areas in the electric appliance, is suitable for detecting the electrogenerated vibration of the electric appliance on line in the manufacturing process of the electric appliance, and is also suitable for detecting the electrogenerated vibration in the running process of the electric appliance, thereby judging whether the working state of the electric appliance is normal or not.
Description
Technical Field
The invention relates to the technical field of vibration detection, in particular to a sensing device for detecting electric appliance electrogenerated vibration.
Background
When the electric appliance is electrified to work, vibration is usually generated to cause noise, and the vibration is called electric vibration of the electric appliance and is a key parameter reflecting the quality and the working state of the electric appliance. Many electrical appliances are subjected to vibration detection in an electrified state before leaving the factory to judge whether the quality of the electrical appliances is qualified or not and whether vibration noise meets a specified noise standard or not. The detection of the electric vibration is a main means for controlling the quality in the production process of electric appliances. The electrical appliance production plant environment is complex, and there are a variety of vibration sources and noise sources that can sometimes overwhelm the electrical appliance's electrical induced vibrations. Therefore, when the existing sensor instrument is used for detecting the electric shock before the delivery of the electric appliance, the vibration of the surrounding environment can seriously interfere with the detection result of the instrument, thereby influencing the detection accuracy and causing the misjudgment of the quality of the electric appliance. In order to overcome the influence of the surrounding environment, a plurality of electrical appliance manufacturing factories carry out the electric-induced vibration detection of the electrical appliances in an original mode of hand touch or ear monitoring at present, and the quality control before delivery is finished. The manual detection mode not only needs trained detection personnel, but also belongs to qualitative detection, the detection efficiency is not high, and the detection result is easily influenced by the emotion of people.
Disclosure of Invention
Technical problem to be solved
In view of the above technical problems, the present invention provides a sensing device for detecting electrical apparatus induced vibration, so as to overcome the disadvantages that the existing vibration detection device is easily interfered by ambient noise and environmental vibration, the detection accuracy is not high, the reliability is poor, and the like, and the original manual detection mode requires personnel training, only qualitative detection is available, the detection efficiency is low, the detection result is easily influenced by the emotion of the person, and the like.
(II) technical scheme
According to one aspect of the present invention, there is provided a sensing device for detecting electrical induced vibration of an appliance, comprising: the device comprises an isolation chamber, a detection sensor, a vibration conduction rod, a sleeve and a spring; the detection sensor is arranged in the isolation chamber, the vibration conduction rod is used for transmitting an electric vibration signal to the detection sensor, the front end of the vibration conduction rod extends out of the front end of the sleeve, and the spring is arranged in the sleeve and used for realizing the reciprocating motion of the vibration conduction rod.
(III) advantageous effects
According to the technical scheme, the sensing device for detecting the electric appliance electrogenerated vibration has at least one of the following beneficial effects:
(1) the sensing device adopts a vibration conduction rod positioning contact detection mode and a double-layer isolation structure of the sensor probe and the environment, effectively enhances the capability of resisting environmental vibration and environmental noise interference, has high detection accuracy, and is suitable for online detection of the electric vibration of the electric appliance in the manufacturing process of the electric appliance;
(2) the sensing device of the invention keeps the compressed length of the spring the same in each detection through the built-in spring structure, thereby keeping the contact force between the vibration conduction rod and the detected electric appliance unchanged, avoiding the interference to the detection result caused by the change of the contact force and improving the repeatability of the detection;
(3) the sensing device of the invention adopts the flexible sound wave guide tube to connect the vibration conduction rod and the sound sensor, thereby creating favorable conditions for detecting the vibration characteristics of narrow areas in the electric appliance;
(4) the sensing device adopts a combined structure of a plurality of vibration conduction rods and a plurality of sound wave guide pipes, can realize one-time multipoint detection, improves the detection efficiency, increases the detection signal strength, and can realize the detection of weak vibration signals of electric appliances;
(5) the sensing device is also suitable for detecting the electric vibration in the running process of the electric appliance so as to judge whether the working state of the electric appliance is normal or not;
(6) the sensing device of the invention has small volume, light weight, more flexible use and wide application range.
Drawings
FIG. 1 is a schematic structural diagram of a sensing device for detecting electric shock of an electrical appliance according to a first embodiment of the present invention;
FIG. 2 is a schematic view of a first embodiment of the present invention with the sensing device in operation;
FIG. 3 is a schematic structural diagram of a sensing device for detecting electric shock of an electrical apparatus according to a second embodiment of the present invention;
FIG. 4 is a schematic view of a second embodiment of the sensing device of the present invention in an operational state;
FIG. 5 is a schematic structural diagram of a sensing device for detecting electric shock of an electrical appliance according to a third embodiment of the present invention;
FIG. 6 is a schematic view of a third embodiment of the sensing device of the present invention in an operational state;
FIG. 7 is a schematic structural diagram of a sensing device for detecting electric shock of an electric appliance according to a fourth embodiment of the present invention;
FIG. 8 is a schematic view of a fourth embodiment of the sensing device of the present invention in an operational state;
FIG. 9 is a schematic structural view of a "one-to-two" adapter tube according to a fourth embodiment of the present invention;
FIG. 10 is a schematic structural diagram of a sensing device for detecting electric shock of an electric appliance according to a fifth embodiment of the present invention;
FIG. 11 is a schematic view of a fifth embodiment of the sensing device of the present invention in an operational state;
FIG. 12 is a schematic structural diagram of a sensing device for detecting electric shock of an electric appliance according to a sixth embodiment of the present invention;
fig. 13 is a schematic view of a sixth embodiment of the sensing device of the present invention in an operational state.
[ Main element ]
1-a sleeve;
2-a vibration conduction rod;
3-a spring;
4 a-an acoustic sensor; 4 b-a vibration sensor;
5-an isolation chamber;
6-an acoustic waveguide;
61- "one to N" adapter tube;
7-support;
8-a signal processing chip;
9-the tested electric appliance.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings.
The first embodiment:
in a first exemplary embodiment of the present invention, a sensing device for detecting electrical induced vibration of an appliance is provided. Fig. 1 is a schematic structural diagram of a sensing device for detecting electric device induced vibration according to a first embodiment of the present invention, and referring to fig. 1, a sensing device for detecting electric device induced vibration includes: sleeve 1, vibration conduction pole 2, spring 3, acoustic sensor 4a, isolation chamber 5.
The sound sensor 4a is fixed in the isolation chamber 5, the sound sensing surface of the sound sensor is opposite to the through hole at the front end of the isolation chamber 5, the rear end of the vibration conduction rod 2 is inserted into the isolation chamber 5 from the through hole and stays in front of the sound sensor 4a, and the vibration conduction rod 2 is fixedly connected with the isolation chamber 5. Isolation room 5 is arranged in sleeve 1, and the front end of vibration conduction pole 2 stretches out from sleeve 1's front end, and spring 3 sets up in sleeve 1 for realize the reciprocating motion of vibration conduction pole, its one end top is at isolation room 5's rear end, and the other end top is at the spacing tank bottom of sleeve 1 rear end, and isolation room 5 can slide in sleeve 1 under the exogenic action, removes behind the exogenic action isolation room 5 can be by the 3 automatic re-settings of spring in the sleeve 1.
In this embodiment, the sensing device further includes a support 7 and a signal processing chip 8. The sleeve 1 is fixed on the support 7, and the signal processing chip 8 is electrically connected with the acoustic sensor 4a through a cable, and is used for supplying power to the acoustic sensor 4a and processing an electric signal generated by the acoustic sensor 4 a.
The vibration conduction rod 2 is used for transmitting an electric vibration signal to an acoustic sensor in the isolation chamber, and is one of a metal rod, a quartz glass rod and a ceramic rod. Wherein, the metal rod is one of steel pole, copper pole, aluminium pole, aluminum alloy pole. The acoustic sensor 4a may be one of a piezoelectric acoustic sensor, a capacitive acoustic sensor, an electromagnetic acoustic sensor, and an optical acoustic sensor. The capacitance type sound sensor can be an electret capacitance type sound sensor, and the optical type sound sensor can be an optical fiber sound sensor. Taking the optical fiber acoustic sensor as an example, the optical fiber acoustic sensor is formed by optically connecting an optical fiber acoustic probe, a light source and a photoelectric detector through optical fibers, and the signal processing chip 8 is electrically connected with the light source and the photoelectric detector of the optical fiber acoustic sensor respectively and is used for supplying power to the light source and processing an electric signal generated by the photoelectric detector.
Fig. 2 is a schematic view of the sensing device in an operating state according to the first embodiment of the present invention. Referring to fig. 2, the support 7 or the electrical device 9 is moved to make the front end of the vibration transmission rod 2 abut against the designated position of the electrical device 9, and the spring 3 is compressed to a predetermined length, so that the electric vibration signal of the electrical device 9 is transmitted from the vibration transmission rod 2 to the rear end thereof and converted into an air sound signal, and the air sound signal is received by the sound sensor 4 a. The electric signal output by the acoustic sensor 4a is processed by a signal processing chip 8.
Thus, a sensing device for detecting electrical induced vibration of an electrical appliance according to a first embodiment of the present invention has been described.
Second embodiment:
in a second exemplary embodiment of the present invention, a sensing device for detecting electrical induced vibration of an appliance is provided. Fig. 3 is a schematic structural diagram of a sensing device for detecting electric appliance induced vibration according to a second embodiment of the present invention, and as shown in fig. 3, compared with the sensing device for detecting electric appliance induced vibration according to the first embodiment, the sensing device of the present embodiment is different in that: the spring 3 is arranged in the sleeve 1 and sleeved on the isolation chamber 5, one end of the spring 3 is propped against the protrusion at the front end of the isolation chamber 5, and the other end of the spring 3 is propped against the rear end of the sleeve 1.
Fig. 4 is a schematic view of a second embodiment of the sensing device of the present invention in an operating state.
For the purpose of brief description, any technical features of the first embodiment that can be applied to the same are described herein, and the same description is not repeated.
Thus, a second embodiment of a sensing device for detecting electrical induced vibration in an electrical appliance is described.
The third embodiment:
in a third exemplary embodiment of the present invention, a sensing device for detecting electrical induced vibration of an appliance is provided. Fig. 5 is a schematic structural diagram of a sensing device for detecting electric appliance induced vibration according to a third embodiment of the present invention, and as shown in fig. 5, compared with the sensing device for detecting electric appliance induced vibration of the first embodiment, the sensing device of the present embodiment is different in that:
the acoustic transducer is characterized by further comprising an acoustic waveguide 6, the acoustic sensor 4a is fixed in the isolation chamber 5, the acoustic sensing surface of the acoustic waveguide is opposite to the through hole in the front end of the isolation chamber 5, one end of the acoustic waveguide 6 is in butt joint with the through hole, the other end of the acoustic waveguide is connected with the rear end of the vibration conduction rod 2, and the signal processing chip 8 is electrically connected with the acoustic sensor 4 a.
The acoustic waveguide 6 is a flexible waveguide, which is a plastic waveguide, a nylon waveguide, a rubber waveguide, a silica gel waveguide, a resin waveguide, or a teflon waveguide.
Fig. 6 is a schematic view of a third embodiment of the sensing device of the present invention in an operating state. Moving the support 7 or the tested electric appliance 9 to make the front end of the vibration conduction rod 2 abut on the designated position of the tested electric appliance 9, and making the spring 3 be compressed to a preset length, the electric vibration signal of the tested electric appliance 9 is transmitted from the vibration conduction rod 2 to the rear end thereof to be converted into an air sound signal, and the air sound signal is transmitted along the sound wave guide tube 6 to the isolation chamber 5 to be received by the sound sensor 4 a. The electric signal output by the acoustic sensor 4a is processed by a signal processing chip 8.
For the purpose of brief description, any technical features of the first embodiment that can be applied to the same are described herein, and the same description is not repeated.
Thus, a third embodiment of a sensing device for detecting electrical induced vibration in an electrical appliance is described.
The fourth embodiment:
in a fourth exemplary embodiment of the present invention, a sensing device for detecting electrical induced vibration of an appliance is provided. Fig. 7 is a schematic structural diagram of a sensing device for detecting electric appliance electric-induced vibration according to a fourth embodiment of the present invention, and as shown in fig. 7, compared with the sensing device for detecting electric appliance electric-induced vibration according to the third embodiment, the sensing device of the present embodiment is different in that:
the sensing device further comprises a one-to-N adapter tube 61, and the one-to-N adapter tube 61 comprises N branch tubes and a trunk tube. Each vibration conduction pole 2 in N vibration conduction poles (wherein N is more than or equal to 2, and N is 2 in this embodiment) is provided with a sleeve 1, and spring 3 arranges in sleeve 1 and overlaps on vibration conduction pole 2, and the one end top of spring 3 is on the arch of vibration conduction pole 2, and the other end top is at the rear end of sleeve 1, and vibration conduction pole 2 can slide along sleeve 1 under the exogenic action, and vibration conduction pole 2 can be by spring 3 automatic re-setting after removing the exogenic action. The rear end of each vibration conduction rod 2 is connected with an acoustic waveguide 6, the other end of each acoustic waveguide 6 is connected with a branch pipe of a one-to-N adapter pipe 61, a main branch pipe of the one-to-N adapter pipe 61 is connected with a through hole at the front end of an isolation chamber 5 through the acoustic waveguide 6, and each sleeve 1 is fixed on a support 7. The signal processing chip 8 is electrically connected to the acoustic sensor 4 a. The acoustic waveguide 6 is a flexible waveguide, and may be one or more of a plastic waveguide, a nylon waveguide, a rubber waveguide, a silicone waveguide, a resin waveguide, or a teflon waveguide.
Fig. 8 is a schematic view showing the working state of the sensing device according to the fourth embodiment of the present invention, in which the support 7 or the electrical device 9 is moved such that the front end of each vibration-conducting rod 2 abuts on a different portion of the electrical device 9, and the spring 3 is compressed to a predetermined length, the electrical induced vibration signal of the electrical device 9 at the portion contacting with the vibration-conducting rod 2 is transmitted from the corresponding vibration-conducting rod 2 to the rear end thereof and converted into an airborne sound signal, and the N airborne sound signals are transmitted to the branch pipes of the "one-to-N" adapting pipe 61 along the respective acoustic wave guide 6, then converged to the main branch pipe, and then transmitted to the isolation chamber 5 by the acoustic wave guide 6 connected to the main branch pipe and received by the acoustic sensor 4 a. The electric signal output by the acoustic sensor 4a is processed by a signal processing chip 8.
Fig. 9 is a schematic structural view of a "one-to-two" adapter tube according to a fourth embodiment of the present invention, where the "one-to-two" adapter tube is made of metal or plastic.
For the purpose of brief description, any technical features of the third embodiment that can be applied to the same are described herein, and the same description is not repeated.
Thus, a fourth embodiment of the present invention is described for a sensing device for detecting electrical induced vibration in an electrical appliance.
Fifth embodiment:
in a fifth exemplary embodiment of the present invention, a sensing device for detecting electrical induced vibration of an appliance is provided. Fig. 10 is a schematic structural diagram of a sensing device for detecting electric appliance electric-induced vibration according to a fifth embodiment of the present invention, and as shown in fig. 10, compared with the sensing device for detecting electric appliance electric-induced vibration of the first embodiment, the sensing device of the present embodiment is different in that:
the acoustic sensor 4a is replaced by a vibration sensor 4 b. The rear end of the vibration conduction rod 2 is inserted into the through hole at the front end of the isolation chamber 5 and then fixedly connected with the isolation chamber 5, the vibration sensor 4b is arranged in the isolation chamber 5 and fixed on the end face of the vibration conduction rod 2, the sensitive shaft of the vibration sensor 4b is parallel to the vibration conduction rod 2, and the signal processing chip 8 is electrically connected with the vibration sensor 4 b. The sleeve 1 is fixed on the support 7, the isolation chamber 5 is arranged in the sleeve 1, and the vibration conduction rod 2 extends out of the front end of the sleeve 1. The spring 3 is arranged in the sleeve 1, one end of the spring is propped against the rear end of the isolation chamber 5, and the other end of the spring is propped against the limiting groove bottom at the rear end of the sleeve 1. The isolation chamber 5 can slide in the sleeve 1 under the action of external force, and the isolation chamber 5 can be automatically reset by the spring 3 in the sleeve 1 after the external force is removed.
Fig. 11 is a schematic diagram of a fifth embodiment of the present invention, in which a sensing device is in an operating state, a support 7 or a tested electrical appliance 9 is moved to make the front end of the vibration transmission rod 2 abut against a designated position of the tested electrical appliance 9, and the spring 3 is compressed to a preset length, an electric vibration signal of the tested electrical appliance 9 is transmitted from the vibration transmission rod 2 to the rear end thereof and received by the vibration sensor 4b, and an electric signal output by the vibration sensor 4b is processed by the signal processing chip 8.
For the purpose of brief description, any technical features of the first embodiment that can be applied to the same are described herein, and the same description is not repeated.
Thus, a fifth embodiment of the present invention is described for a sensing device for detecting electrical induced vibration in an electrical appliance.
Sixth embodiment:
in a sixth exemplary embodiment of the present invention, a sensing device for detecting electrical induced vibration of an appliance is provided. Fig. 12 is a schematic structural diagram of a sensing device for detecting electric appliance electric-induced vibration according to a sixth embodiment of the present invention, and as shown in fig. 12, compared with the sensing device for detecting electric appliance electric-induced vibration according to the fifth embodiment, the sensing device of the present embodiment is different in that:
Fig. 13 is a schematic diagram illustrating the operation state of the sensing device according to the fifth embodiment of the present invention, in which the support 7 or the electrical device 9 is moved to make the front end of the vibration transmission rod 2 abut against the electrical device 9, and the spring 3 is compressed to a predetermined length, the electric signal of the electrical device 9 is transmitted from the vibration transmission rod 2 to the rear end thereof and received by the vibration sensor 4b, and the electric signal output by the vibration sensor 4b is processed by the signal processing chip 8.
For the purpose of brief description, any technical features of the fifth embodiment that can be applied to the same are described herein, and the same description is not repeated.
Thus, a sensing device for detecting electrical induced vibration of an electrical appliance according to a sixth embodiment of the present invention has been described.
In summary, the sensing device for detecting the electric appliance induced vibration is a sound sensor or a vibration sensor, has small volume, light weight, strong environmental vibration and environmental noise interference resistance, high detection accuracy, good repeatability and high detection efficiency, can detect weak electric-induced vibration signals of the electric appliance, can be used for detecting the vibration characteristics of narrow areas in the electric appliance, is suitable for detecting the electric appliance induced vibration on line in the manufacturing process of the electric appliance, and is also suitable for detecting the electric-induced vibration in the running process of the electric appliance, thereby judging whether the working state of the electric appliance is normal or not.
It is to be noted that, in the attached drawings or in the description, the implementation modes not shown or described are all the modes known by the ordinary skilled person in the field of technology, and are not described in detail. Furthermore, the above definitions of the various elements and methods are not limited to the particular structures, shapes or arrangements of parts mentioned in the examples, which may be easily modified or substituted by one of ordinary skill in the art, for example:
(1) the spring can also be in the form of a tension spring besides a compression spring; in the case of an extension spring, the spring should be placed at the front end of the sleeve;
(2) the vibration conduction rod can be replaced by a solid rod, a metal tube or a ceramic tube or a glass tube with openings at two ends; when a tubular vibration conduction rod is adopted, one end of the vibration conduction rod, which is in contact with the tested electric appliance, can be in a bell mouth shape;
it is also noted that the illustrations herein may provide examples of parameters that include particular values, but that these parameters need not be exactly equal to the corresponding values, but may be approximated to the corresponding values within acceptable error tolerances or design constraints. Directional phrases used in the embodiments, such as "upper", "lower", "front", "rear", "left", "right", etc., refer only to the direction of the attached drawings and are not intended to limit the scope of the present invention. In addition, unless steps are specifically described or must occur in sequence, the order of the steps is not limited to that listed above and may be changed or rearranged as desired by the desired design. The embodiments described above may be mixed and matched with each other or with other embodiments based on design and reliability considerations, i.e., technical features in different embodiments may be freely combined to form further embodiments.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.
It should be noted that throughout the drawings, like elements are represented by like or similar reference numerals. In the above description, some specific embodiments are only used for descriptive purposes and should not be construed as limiting the invention in any way, but merely as exemplifications of embodiments of the invention. Conventional structures or constructions will be omitted when they may obscure the understanding of the present invention. It should be noted that the shapes and sizes of the respective components in the drawings do not reflect actual sizes and proportions, but merely illustrate the contents of the embodiments of the present invention.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A sensing device for detecting electrical induced vibration in an electrical appliance, comprising:
an isolation chamber;
the detection sensor is an acoustic sensor and is fixed in the isolation chamber, and the sound sensing surface of the detection sensor is opposite to the through hole at the front end of the isolation chamber;
the vibration conduction rod is used for transmitting an electric vibration signal of the tested electric appliance to the rear end of the vibration conduction rod and converting the electric vibration signal into an air sound signal, and the air sound signal is received by the sound sensor;
a sleeve from which the front end of the vibration conduction rod extends;
the spring is arranged in the sleeve and used for realizing the reciprocating motion of the vibration conduction rod; wherein the content of the first and second substances,
the isolation chamber is arranged in the sleeve, the rear end of the vibration conduction rod is inserted into the isolation chamber from the through hole and stays in front of the sound sensor and at a position where the vibration conduction rod is not in contact with the sound sensor, and the vibration conduction rod is fixedly connected with the isolation chamber.
2. The sensing device of claim 1,
one end of the spring is propped against the rear end of the isolation chamber, and the other end of the spring is propped against the rear end of the sleeve; alternatively, the first and second electrodes may be,
the spring is sleeved on the isolation chamber, one end of the spring is propped against the protrusion at the front end of the isolation chamber, and the other end of the spring is propped against the rear end of the sleeve.
3. The sensing device of claim 1, further comprising:
one end of the sound wave guide pipe is in butt joint with the through hole, the other end of the sound wave guide pipe is connected with the rear end of the vibration conduction rod, the vibration conduction rod penetrates through the sleeve, the spring is sleeved on the vibration conduction rod, one end of the spring abuts against the protrusion of the vibration conduction rod, and the other end of the spring abuts against the rear end of the sleeve.
4. The sensing device of claim 3, further comprising:
the 'one-to-N' adapter tube comprises N branch tubes and a main branch tube, wherein N is more than or equal to 2, a sleeve is arranged on each vibration conduction rod, the rear end of each vibration conduction rod is connected with a sound wave guide tube, the other end of each sound wave guide tube is connected with the one-to-N branch tube of the 'one-to-N' adapter tube, and the main branch tube of the 'one-to-N' adapter tube is connected with the through hole at the front end of the isolation chamber through the sound wave guide tube.
5. The sensing device of claim 1, further comprising:
the sleeve is fixed on the support;
and the signal processing chip is electrically connected with the detection sensor.
6. The sensing device of claim 1, wherein the acoustic sensor is a piezoelectric acoustic sensor, a capacitive acoustic sensor, an electromagnetic acoustic sensor, or an optical acoustic sensor.
7. The sensing device of claim 6, wherein the capacitive acoustic sensor is an electret capacitive acoustic sensor and the optical acoustic sensor is a fiber optic acoustic sensor.
8. A sensing apparatus according to claim 3 or 4, wherein the acoustic waveguide is one or more of a plastic, nylon, rubber, silicone, resin or polytetrafluoroethylene waveguide.
9. A sensing device according to claim 1, wherein the vibration conducting rod is a metal rod, a quartz glass rod or a ceramic rod.
10. The sensing device of claim 9, wherein the metal rod is a steel rod, a copper rod, an aluminum rod, or an aluminum alloy rod.
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| CN201710028202 | 2017-01-13 | ||
| CN2017100282020 | 2017-01-13 |
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| CN108574755A (en) * | 2018-06-13 | 2018-09-25 | 阜南县特立电子有限公司 | A kind of phone vibrator automatic testing equipment |
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|---|---|---|---|---|
| DE10349398A1 (en) * | 2003-10-21 | 2005-06-02 | Thomas Jaggo | Sensor for measuring the structure-borne sound, vibrations and oscillations of a test object has an axially displaceable rod within a housing with one end held against the test object and the other connected to a sound sensor |
| CN2775637Y (en) * | 2004-12-09 | 2006-04-26 | 武汉昊海立德科技有限公司 | Conducting device for measuring blast furnace distributing device vibration |
| CN105784394A (en) * | 2016-03-02 | 2016-07-20 | 中国科学院电子学研究所 | Mechanical fault acoustic detector |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0545340A (en) * | 1991-08-13 | 1993-02-23 | Toshiba Corp | Ultrasonic signal detecting apparatus |
| JPH08210909A (en) * | 1995-02-02 | 1996-08-20 | Fujitsu Ten Ltd | Operation abnormal sound detection device for electrical apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10349398A1 (en) * | 2003-10-21 | 2005-06-02 | Thomas Jaggo | Sensor for measuring the structure-borne sound, vibrations and oscillations of a test object has an axially displaceable rod within a housing with one end held against the test object and the other connected to a sound sensor |
| CN2775637Y (en) * | 2004-12-09 | 2006-04-26 | 武汉昊海立德科技有限公司 | Conducting device for measuring blast furnace distributing device vibration |
| CN105784394A (en) * | 2016-03-02 | 2016-07-20 | 中国科学院电子学研究所 | Mechanical fault acoustic detector |
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