CN211602154U - Rotation type compact sound level meter automatic calibration device - Google Patents
Rotation type compact sound level meter automatic calibration device Download PDFInfo
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- CN211602154U CN211602154U CN202020572640.0U CN202020572640U CN211602154U CN 211602154 U CN211602154 U CN 211602154U CN 202020572640 U CN202020572640 U CN 202020572640U CN 211602154 U CN211602154 U CN 211602154U
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Abstract
The utility model discloses a rotation type compact sound level meter automatic calibration device, the device includes: a sound level meter with flexibly adjustable position; a sound pressure calibrator with a fixed position; a sound level meter position automatic adjusting device for supporting the sound level meter and automatically adjusting the position of the sound level meter during calibration; the main control unit is used for coordinating and controlling the operation of the automatic position adjusting equipment of the sound level meter, realizing the position adjustment of the sound level meter, acquiring and analyzing data of the sound level meter and the sound pressure calibrator and further calibrating the sound level meter; the main control unit is connected with the sound level meter, the sound pressure calibrator and the sound level meter position automatic adjusting equipment. The utility model discloses only design one set of position control equipment, through the improvement to system architecture, reduced system occupation space greatly, the cost is reduced has reduced the requirement to control system processing and assembly precision, has improved the holistic stability of system.
Description
Technical Field
The utility model relates to a sound level meter calibration technical field especially relates to a rotation type compact sound level meter automatic calibration device.
Background
Sound level meters are common instruments in environmental monitoring and occupational health detection, and since the sound level meters have a reading drift phenomenon after being used for a period of time, users need to periodically calibrate the sound level meters so as to ensure the accuracy of the readings of the sound level meters.
Sound level meters are commonly used in two ways: one is manual short-term monitoring by using an instrument, and the other is long-term on-line monitoring of the monitoring environment by an on-line monitoring system.
For the first case, the user may calibrate the sound level meter with a sound level meter calibrator prior to each monitoring. In the second case, the monitoring equipment is usually installed in a monitoring box at a high distance from the ground, so that it is difficult to periodically perform manual calibration, and auxiliary equipment such as a ladder or a man-lift vehicle is usually required.
The applicant has disclosed in patent No. 201911154091.3 entitled "an automatic sound level meter calibration device and method" an automatic sound level meter calibration system for periodically automatically calibrating a sound level meter installed in a monitoring box located at a high distance from the ground, thereby avoiding the trouble of manual operation. This system passes through master control unit drive sound level meter position automatically regulated equipment and sound pressure calibrator position automatically regulated equipment, adjusts the position of sound level meter and sound pressure calibrator respectively for sound pressure calibrator directly overlaps on the microphone of sound level meter during the calibration, carries out the calibration of sound level meter, and after the calibration was accomplished, original position was got back to again to sound level meter and sound pressure calibrator.
However, in the process of implementing the technical solution of the present invention in the embodiment of the present application, the inventor of the present application finds that the above-mentioned technology has at least the following technical problems:
1. the sound level meter microphone and the sound pressure calibrator are required to be subjected to position adjustment, so that the sound level meter microphone and the sound pressure calibrator are both moving parts, two sets of position adjusting equipment are required to be arranged, the occupied space of the equipment is large, and the size of the whole box body of the system is large.
2. The mode that the servo motor adds the module is adopted to control the sound level meter microphone and the sound pressure calibrator to move, and the cost is relatively high.
3. Because the sound level meter microphone and the sound pressure calibrator both have motion tracks, the working result of the whole system can be influenced after any one of the two motions deviates, and the guarantee of the motion precision completely depends on the rotation of the motor and the processing and assembling precision of the system, so the processing and assembling requirements of the whole system are higher.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a rotation type compact sound level meter automatic calibration device, has solved sound level meter automatic calibration device occupation space among the prior art big, with high costs, the high technical problem of processing assembly requirement, only designs one set of position control equipment, through the improvement to system architecture, has reduced system occupation space greatly, and the cost is reduced has reduced the requirement to control system processing and assembly precision, has improved the holistic stability of system.
The embodiment of the application provides a rotation type compact sound level meter automatic calibration device, includes:
a sound level meter with flexibly adjustable position;
a sound pressure calibrator with a fixed position;
a sound level meter position automatic adjusting device for supporting the sound level meter and automatically adjusting the position of the sound level meter during calibration;
the main control unit is used for coordinating and controlling the operation of the automatic position adjusting equipment of the sound level meter, realizing the position adjustment of the sound level meter, acquiring and analyzing data of the sound level meter and the sound pressure calibrator and further calibrating the sound level meter;
the main control unit is connected with the sound level meter, the sound pressure calibrator and the sound level meter position automatic adjusting equipment.
Preferably, the main control unit controls the automatic sound level meter position adjusting device to automatically adjust the position of the sound level meter during calibration, inserts a microphone of the sound level meter into the sound pressure calibrator to calibrate, and resets the sound level meter after calibration is completed.
Preferably, the device further comprises a monitoring box, the sound pressure calibrator is fixedly embedded on a shell of the monitoring box, the sound pressure calibrator is partially exposed outside the monitoring box, and a sound source hole of the sound pressure calibrator is located in the monitoring box.
More preferably, the automatic sound level meter position adjusting device is arranged inside the monitoring box and penetrates through the monitoring box to be connected with the sound level meter.
Preferably, the automatic position adjustment device of the sound level meter comprises a sound level meter supporting shaft, one end of the sound level meter supporting shaft penetrates through the monitoring box and is connected with the sound level meter, the other end of the sound level meter supporting shaft is fixed on an eccentric base, and the eccentric base is fixed on a tray through a rotating gear mechanism and is connected with a rotating motor; the tray is tightly attached to the end of the rack, and the rack is connected with a lifting motor through a lifting gear.
More preferably, the rotating gear mechanism includes a first rotating gear and a second rotating gear that are engaged with each other, the eccentric base is fixedly connected with the first rotating gear, the first rotating gear is fixed on the tray, and the second rotating gear is connected with the rotating motor.
Further, the rack is coaxially arranged in the lifting chute in a lifting way.
Furthermore, a track groove for protecting and guiding the sound level meter to move along a set track is arranged on the side surface of the automatic sound level meter position adjusting device.
Furthermore, a limiting mechanism is arranged at the limit position of the track groove.
Furthermore, the main control unit is connected with the remote control terminal through a wireless transmission module.
When the automatic calibration device for the rotary compact sound level meter is used, the steps are as follows:
adjusting the sound level meter to be in a calibration mode;
starting a sound pressure calibrator to generate a standard sound source;
controlling the position of the sound level meter to automatically adjust the equipment to work, inserting a microphone of the sound level meter into a sound source hole of the sound pressure calibrator, and calibrating the sound level meter;
after the calibration is completed, the sound level meter is reset and switched to a test mode, and normal data monitoring work is continued.
Preferably, in a calibration period, the action process of the automatic sound level meter position adjusting device is as follows:
in an initial state, the sound level meter is in a monitoring mode, and a microphone of the sound level meter is located at a working position outside the monitoring box at the moment;
after the calibration is started, the main control unit triggers the lifting motor to work, so that the microphone of the sound level meter withdraws into the monitoring box;
the main control unit triggers the rotating motor to work, so that the eccentric base rotates, and a microphone of the sound level meter is brought to the position below a sound source hole of the sound pressure calibrator;
the main control unit triggers the lifting motor to rotate reversely, so that a microphone of the sound level meter is inserted into a sound source hole of the sound pressure calibrator, and the sound level meter is calibrated;
after the calibration is finished, the main control unit triggers the lifting motor to work, and the microphone of the sound level meter is withdrawn from the sound source hole of the sound pressure calibrator to be below the sound source hole of the sound pressure calibrator;
the main control unit triggers the rotating motor to rotate reversely, the eccentric base is rotated and returned, and the microphone of the sound level meter returns to the lower part of the working position;
and finally, the main control unit triggers the lifting motor to rotate reversely, so that the microphone of the sound level meter returns to the working position.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
1. the sound pressure calibrator is fixed in position, so that the sound pressure calibrator can be embedded into the monitoring box, the internal space of the monitoring box can be effectively saved, the lifting stroke of a microphone of the sound level meter can be effectively reduced, and the size of the whole box can be effectively reduced.
2. The sound pressure calibrator adopts a fixed position and only one set of position adjusting equipment, so that only one set of motion trail exists, and compared with the traditional two sets of motion trails, the sound pressure calibrator is simpler and more convenient to control.
3. Through improving system mechanical structure, the servo motor that removes the adoption of traditional control sound pressure calibrator and sound level meter adds the mode of module, changes into to adopt ordinary rotating electrical machines drive to replace, therefore can save the cost, and the choice space of motor is also bigger.
4. The mechanical limit is arranged in the rotation of the eccentric chassis and the up-and-down sliding of the sound level meter, the requirements on the processing and assembling precision of the control system can be reduced, and the integral stability of the calibration system is ensured by the high stability of the mechanical structure.
Drawings
FIG. 1 is a schematic structural diagram (initial state, monitoring position) of an automatic calibration device of a rotary compact sound level meter provided in an embodiment of the present application;
FIG. 2 is a schematic diagram of a control system for an automatic calibration device for a rotary compact sound level meter provided in an embodiment of the present application;
FIG. 3 is a schematic diagram of a sound level meter according to an embodiment of the present invention with a microphone retracted into a monitoring box;
fig. 4 is a schematic view of a microphone of a sound level meter rotating to a position below a sound source hole of a sound pressure calibrator in an embodiment of the present application;
fig. 5 is a schematic diagram of a microphone of a sound level meter inserted into a sound source hole of a sound pressure calibrator in the embodiment of the present application;
FIG. 6 is a schematic diagram illustrating a microphone of the sound level meter being retracted to a position below a sound source hole of the sound pressure calibrator in an embodiment of the present invention;
fig. 7 is a schematic diagram of the microphone rotation return of the sound level meter in the embodiment of the present application;
fig. 8 is a schematic view of the return of the microphone of the sound level meter to the monitoring position in the embodiment of the present application.
Detailed Description
The embodiment of the application provides a rotation type compact sound level meter automatic calibration device, has solved sound level meter automatic calibration device occupation space among the prior art big, with high costs, the processing assembly requires high technical problem, through the improvement to system architecture, has reduced system occupation space greatly, and the cost is reduced has reduced the requirement to control system processing and assembly precision, has improved the holistic stability of system.
In order to solve the problem of crosstalk, the technical scheme in the embodiment of the present application has the following general idea:
the sound pressure calibrator adopts a fixed position, and only one set of position adjusting equipment is designed for a microphone of the sound level meter. During calibration, after the microphone is retracted for a short distance, the microphone is rotated to the position below the sound pressure calibrator and then is inserted into a sound source hole of the sound pressure calibrator to be calibrated. After calibration is complete, the microphone is withdrawn from the sound source aperture of the sound pressure calibrator and rotated back into position.
Because the sound pressure calibrator adopts the fixed position, therefore the sound pressure calibrator can imbed outside the main tank body to effectively save box inner space. The travel of the microphone along the longitudinal direction can be effectively reduced, so that the size of the whole box body can be effectively reduced.
Through improving mechanical structure, adopt rotatable eccentric chassis and spout combination, adopt in the position control equipment of sound level meter microphone ordinary rotating electrical machines drive can, need not to use servo motor, can save the cost, the selection space of motor is also bigger.
Because only one set of position control equipment exists, only one set of motion trail exists, further, mechanical limit can be set in the rotation of the eccentric chassis and the up-and-down sliding of the sound level meter, the requirements on the processing and assembling precision of the control system can be reduced, and the integral stability of the calibration system is ensured by the aid of the characteristic of high stability of a mechanical structure.
For better understanding of the above technical solutions, reference will now be made to the drawings and specific description
Fig. 1 is a schematic structural diagram of an automatic calibration device for a rotary compact sound level meter provided in an embodiment of the present application, where the automatic calibration device for a rotary compact sound level meter includes:
the sound level meter 1, the position of the sound level meter 1 can be flexibly adjusted;
the sound pressure calibrator 2 is fixed in position;
the sound level meter position automatic adjusting device 3 is used for supporting the sound level meter 1, automatically adjusting the position of the sound level meter 1 during calibration, inserting a microphone of the sound level meter 1 into the sound pressure calibrator 2 for calibration, and resetting the sound level meter 1 after the calibration is finished;
the monitoring box 4 is used for assembling the sound level meter 1, the sound pressure calibrator 2 and the sound level meter position automatic adjusting equipment 3;
and the main control unit 5 is connected with the sound level meter 1, the sound pressure calibrator 2 and the sound level meter position automatic adjusting device 3, and is used for coordinating and controlling the operation of the sound level meter position automatic adjusting device 3, acquiring and analyzing data of the sound level meter 1 and the sound pressure calibrator 2, and modifying an adjusting coefficient of the sound level meter 1.
In this embodiment, the sound level meter 1 is formed by sequentially connecting a microphone, a preamplifier, a data processing module, and a noise sound level display module. The microphone converts the sound into an electric signal, the electric signal is amplified by the preamplifier and then sent to the data processing module for processing and analysis, the numerical value of the noise level is obtained, and the numerical value is displayed by the noise level display module.
Wherein, the microphone and the preamplifier are integrated together to form the microphone. The data processing module and the noise sound level display module are integrated together to form a sound level meter control unit. The microphone is connected with the sound level meter control unit through an extension line.
In this embodiment, the sound pressure calibrator 2 is also called a sound level calibrator, and is configured to generate one or more known sound pressure levels at one or more predetermined frequencies, thereby determining the sound pressure sensitivity of a microphone of a predetermined type and configuration.
The sound pressure calibrator 2 is fixedly embedded on a shell of the monitoring box 4, the sound pressure calibrator 2 is partially exposed outside the monitoring box 4, and a sound source hole of the sound pressure calibrator 2 is positioned in the monitoring box 4.
As a preferred embodiment, a rain-proof device is arranged above the sound pressure calibrator 2.
In this embodiment, the automatic sound level meter position adjusting device 3 is composed of a sound level meter supporting shaft 31, an eccentric base 32, a bearing 33, a first rotating gear 34, a tray 35, a second rotating gear 36, a rotating motor 37, a rack 38, a lifting chute 39, a lifting gear 310, a lifting motor 311, and the like.
The upper end of the support shaft 31 of the sound level meter passes through the monitoring box 4 and is connected with the sound level meter 1, and other components of the automatic position adjusting device 3 of the sound level meter are arranged inside the monitoring box 4.
The lower end of the sound level meter supporting shaft 31 is fixed on an eccentric base 32, the eccentric base 32 is fixedly connected with a first rotating gear 34, and the first rotating gear 34 is fixed on a tray 35. The first rotary gear 34 is engaged with a second rotary gear 36, and the second rotary gear 36 is connected to a rotary motor 37. The first rotary gear 34 is provided at both ends thereof with bearings 33 so that friction force when the first rotary gear 34 rotates can be reduced.
The upper end of the rack 38 is tightly attached to the tray 35, but the two are not fixedly connected. The rack 38 is coaxially disposed in the lifting chute 39, the rack 38 is engaged with the lifting gear 310 to form a rack-and-pinion mechanism, and the lifting gear 310 is connected to the lifting motor 311.
When the automatic sound level meter position adjusting device 3 works, the rotary motor 37 drives the sound level meter 1 to rotate, and the lifting motor 311 drives the sound level meter 1 to lift. The method comprises the following specific steps:
the rotating motor 37 works to drive the second rotating gear 36 to rotate, so as to drive the first rotating gear 34 to rotate, and the eccentric base 32 and the tray 35 rotate along with the first rotating gear, so as to drive the sound level meter 1 to rotate. Since rack 38 is disposed coaxially with tray 35, but is not fixedly attached, tray 35 is allowed to rotate without rotating rack 38.
The rack 38 can move up and down in the lifting chute 39, and the lifting movement of the rack 38 is driven by the lifting motor 311 and completed by a gear rack mechanism. That is, the lifting motor 311 works to drive the lifting gear 310 to rotate, so as to drive the rack 38 to move up and down in the lifting chute 39.
In this embodiment, the main control unit 5 may adopt an industrial personal computer, a raspberry pi or a single chip microcomputer. With reference to fig. 2, the main control unit 5 is connected to the sound level meter 1, the sound pressure calibrator 2, the rotating motor 37, and the lifting motor 311, and the main control unit 5 controls the operation of the rotating motor 37 and the lifting motor 311 to adjust the position of the sound level meter 1; the main control unit 5 also collects and analyzes data of the sound level meter 1 and the sound pressure calibrator 2, and modifies adjustment coefficients of the sound level meter 1.
As a preferred embodiment, the main control unit 5 is further connected to a remote control terminal through a wireless transmission module, and sends the real-time data collection and calibration results to the remote control terminal.
The specific working method of the automatic calibration device for the rotary compact sound level meter provided by the embodiment is as follows:
step S1: adjusting the sound level meter 1 to be in a calibration mode;
step S2: starting the sound pressure calibrator 2 to generate a standard sound source; typical standard sound sources are 1kHz, 96dB or 1kHz, 114 dB;
step S3: controlling the automatic position adjusting device 3 of the sound level meter to work, and inserting a microphone of the sound level meter 1 into a sound source hole of the sound pressure calibrator 2;
step S4: informing the sound level meter 1 that the current input signal is a standard signal (96dB or 114dB), wherein a microphone of the sound level meter 1 acquires the standard signal, and the standard signal is processed by an internal data processing module to give a numerical value of a noise level; comparing the value given by the sound level meter 1 with a standard signal sent by the sound pressure calibrator 2, if deviation exists, calculating an adjusting coefficient according to the deviation, writing the adjusting coefficient into an internal data processing module of the sound level meter 1, and finally, achieving the condition that the reading of the sound level meter 1 is consistent with the value of the sound pressure calibrator 2, and completing primary calibration of the sound level meter;
step S5: and switching the sound level meter to a test mode, and continuously monitoring data.
The step S1, the step S2 and the step S3 are not in sequence, and the steps may be exchanged.
In the specific operation process, the user is allowed to set the calibration to be carried out at regular intervals. When the system triggers calibration, the master control unit sets the sound level meter into a calibration mode, the rotary motor and the lifting motor are driven by the control card to be calibrated, and the system automatically switches the sound level meter into a test mode to continue monitoring data after the calibration is completed.
In the calibration process, the action steps of the automatic sound level meter position adjusting device 3 are as follows:
in the initial state, the sound level meter 1 is in the monitoring mode, and the microphone of the sound level meter 1 is outside the monitoring box 4, as shown in fig. 1. As a preferred embodiment, the monitoring box 4 is provided with a hollow sleeve 41 for limiting and protecting the up-and-down movement of the sound level meter microphone. The upper end of the sound level meter supporting shaft 31 passes through the hollow sleeve 41 and is connected with the sound level meter 1.
After the calibration is started, the sound level meter 1 is set to the calibration mode, and the sound pressure calibrator 2 is triggered to emit the standard sound.
The main control unit 5 triggers the lifting motor 311 to work, so that the microphone of the sound level meter 1 is withdrawn into the monitoring box 4, as shown in fig. 3.
Then, the main control unit 5 activates the rotating motor 37 to rotate the eccentric base 32, and brings the microphone of the sound level meter 1 below the sound source hole of the sound pressure calibrator 2, as shown in fig. 4.
Subsequently, the main control unit 5 triggers the lifting motor 311 to reverse, so that the microphone of the sound level meter 1 is inserted into the sound source hole of the sound pressure calibrator 2, as shown in fig. 5. And sends a command to the sound level meter 1 to perform calibration work.
After the calibration is completed, the main control unit 5 triggers the lifting motor 311 to operate, and the microphone of the sound level meter 1 is withdrawn from the sound source hole of the sound pressure calibrator 2, as shown in fig. 6.
Next, the main control unit 5 triggers the rotating motor 37 to rotate reversely, and rotates the eccentric base 32 back again, so that the microphone of the sound level meter 1 returns to the lower part of the working position, as shown in fig. 7.
Finally, the main control unit 5 triggers the lifting motor 311 to reverse direction, so that the microphone of the sound level meter 1 returns to the working position, as shown in fig. 8, and the sound level meter 1 is set to the monitoring mode by command, thereby completing a complete calibration cycle.
As a preferred embodiment, a limiting mechanism is arranged at the limit position of the up-and-down movement and the rotation movement of the sound level meter, so that the limiting control of the movement position of the sound level meter is realized.
As a preferred embodiment, a rotating track groove and a lifting track groove are arranged on one side of the automatic sound level meter position adjusting device, so that the automatic sound level meter position adjusting device is protected from moving along the set track groove, and system derailment cannot occur.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages:
1. the sound pressure calibrator is fixed in position, so that the sound pressure calibrator can be embedded into the monitoring box, the internal space of the monitoring box can be effectively saved, the lifting stroke of a microphone of the sound level meter can be effectively reduced, and the size of the whole box can be effectively reduced.
2. The sound pressure calibrator adopts a fixed position and only one set of position adjusting equipment, so that only one set of motion trail exists, and compared with the traditional two sets of motion trails, the sound pressure calibrator is simpler and more convenient to control.
3. Through improving system mechanical structure, the servo motor that removes the adoption of traditional control sound pressure calibrator and sound level meter adds the mode of module, changes into to adopt ordinary rotating electrical machines drive to replace, therefore can save the cost, and the choice space of motor is also bigger.
4. The mechanical limit is arranged in the rotation of the eccentric chassis and the up-and-down sliding of the sound level meter, the requirements on the processing and assembling precision of the control system can be reduced, and the integral stability of the calibration system is ensured by the high stability of the mechanical structure.
It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element may be termed a second element, and, similarly, a second element may be termed a first element, without departing from the scope of example embodiments.
The terms of orientation of up, down, left, right, front, back, top, bottom, and the like referred to or may be referred to in this specification are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed correspondingly according to the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms.
While the foregoing is directed to the preferred embodiment of the present application, and not to the limiting thereof in any way and any way, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. Those skilled in the art can make various changes, modifications and equivalent arrangements to those skilled in the art without departing from the spirit and scope of the present application; moreover, any equivalent alterations, modifications and variations of the above-described embodiments according to the spirit and techniques of this application are intended to be within the scope of the claims of this application.
Claims (10)
1. A rotary compact sound level meter automatic calibration device, comprising:
a sound level meter (1) with flexibly adjustable position;
a sound pressure calibrator (2) with a fixed position;
a sound level meter position automatic adjustment device (3) for supporting the sound level meter (1) and automatically adjusting the position of the sound level meter (1) at the time of calibration;
the main control unit (5) is used for coordinating and controlling the operation of the sound level meter position automatic adjusting equipment (3), realizing the position adjustment of the sound level meter (1), acquiring and analyzing data of the sound level meter (1) and the sound pressure calibrator (2), and further calibrating the sound level meter (1);
the main control unit (5) is connected with the sound level meter (1), the sound pressure calibrator (2) and the sound level meter position automatic adjusting equipment (3).
2. The automatic calibrating device for a rotary compact sound level meter according to claim 1, characterized in that it further comprises a monitoring box (4), the sound pressure calibrator (2) is fixedly embedded in the housing of the monitoring box (4), the sound pressure calibrator (2) is partially exposed outside the monitoring box (4), and the sound source hole of the sound pressure calibrator (2) is located in the monitoring box (4).
3. A rotary compact sound level meter auto-calibration device according to claim 2, characterized in that the sound level meter position auto-adjustment device (3) is arranged inside the monitoring box (4) and is connected to the sound level meter (1) through the monitoring box (4).
4. The automatic rotary compact sound level meter calibration device according to claim 3 characterized in that the automatic sound level meter position adjustment device (3) comprises a sound level meter support shaft (31), one end of the sound level meter support shaft (31) is connected to the sound level meter (1) through the monitoring box (4), the other end of the sound level meter support shaft (31) is fixed to an eccentric base (32), the eccentric base (32) is fixed to a tray (35) through a rotating gear mechanism and is connected to a rotating motor (37); the tray (35) is tightly attached to the end part of the rack (38), and the rack (38) is connected with a lifting motor (311) through a lifting gear (310).
5. A rotary compact sound level meter automatic calibration device according to claim 4, characterized in that the monitoring box (4) is provided with a hollow sleeve (41), the upper end of the sound level meter support shaft (31) passes through the hollow sleeve (41) and is connected with the sound level meter (1).
6. The automatic rotary compact sound level meter calibration device according to claim 4, characterized in that the rotating gear mechanism comprises a first rotating gear (34) and a second rotating gear (36) which are meshed with each other, the eccentric base (32) is fixedly connected with the first rotating gear (34), the first rotating gear (34) is fixed on the tray (35), and the second rotating gear (36) is connected with the rotating motor (37).
7. Automatic calibration device for rotary compact sound level meters according to claim 4, characterized in that the toothed rack (38) is coaxially arranged in a lifting chute (39) in a liftable manner.
8. A rotary compact sound level meter auto-calibration device according to claim 4, characterized in that the side of the auto-adjustment device (3) for the sound level meter position is provided with a track groove for protecting and guiding the sound level meter (1) to move along a set track.
9. The automatic rotary compact sound level meter calibration device according to claim 8, wherein the limit positions of the track groove are provided with limit mechanisms.
10. The automatic calibration device for rotary compact sound level meters according to claim 1, characterized in that the master control unit (5) is connected to a remote control terminal via a wireless transmission module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020572640.0U CN211602154U (en) | 2020-04-17 | 2020-04-17 | Rotation type compact sound level meter automatic calibration device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020572640.0U CN211602154U (en) | 2020-04-17 | 2020-04-17 | Rotation type compact sound level meter automatic calibration device |
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| CN211602154U true CN211602154U (en) | 2020-09-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111366236A (en) * | 2020-04-17 | 2020-07-03 | 上海尚毅测控技术有限公司 | Automatic calibration device and method for rotary compact sound level meter |
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2020
- 2020-04-17 CN CN202020572640.0U patent/CN211602154U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111366236A (en) * | 2020-04-17 | 2020-07-03 | 上海尚毅测控技术有限公司 | Automatic calibration device and method for rotary compact sound level meter |
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