CN213209245U - Low decibel detection device - Google Patents
Low decibel detection device Download PDFInfo
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- CN213209245U CN213209245U CN202021523181.3U CN202021523181U CN213209245U CN 213209245 U CN213209245 U CN 213209245U CN 202021523181 U CN202021523181 U CN 202021523181U CN 213209245 U CN213209245 U CN 213209245U
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- preamplifier
- low decibel
- shell
- detection device
- testing
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Abstract
The utility model discloses a low decibel detection device, include: the testing device comprises a shell, wherein an overload indicator lamp, a power-on reset key, a liquid crystal display and a buckling operation area are arranged on the front surface of the shell, a preamplifier is arranged at the top end of the shell, a testing rod is mounted on the preamplifier, a capacitance sensor is mounted at the top end of the testing rod, the testing rods are symmetrically mounted on the preamplifier, a storage battery is mounted at the bottom inside the shell and electrically connected with a control panel, the preamplifier is electrically connected with the control panel, and the indicator lamp, the power-on reset key, the liquid crystal display and the buckling operation area are all connected with the control panel. This practical low decibel detection device adopts digital detection technique, has improved the stability and the reliability of detection, and dynamic range is big, easy operation, usage extensively.
Description
Technical Field
The utility model relates to a technical field that the sound detected the setting especially relates to a low decibel detection device.
Background
The sound level meter is a subjective electronic instrument, and the working principle of the sound level meter is as follows: the sound is converted into an electric signal by a microphone, and impedance is converted by a preamplifier to match the microphone with an attenuator. The amplifier adds the output signal to the weighting network, carries on frequency weighting (or external filter) to the signal, then amplifies the signal to certain amplitude through the attenuator and amplifier, sends to the effective value detector (or external according to the level recorder), gives the value of the noise level on the indicating gauge head, the level meter in the using process, the testing result has large influence to the placing position and the microphone angle, makes the testing accuracy of the level meter have some error.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the main technical problem who solves provides a low decibel detection device, adopts digital detection technique, has improved the stability and the reliability of detection, and dynamic range is big, easy operation, light in weight, conveniently carry, and the usage is wide.
In order to solve the technical problem, the utility model discloses a technical scheme be: a low decibel detection apparatus, comprising: the testing device comprises a shell, wherein an overload indicator lamp, a power-on reset key, a liquid crystal display and a buckling operation area are arranged on the front surface of the shell, a preamplifier is arranged at the top end of the shell, a testing rod is mounted on the preamplifier, a capacitance sensor is mounted at the top end of the testing rod, the testing rods are symmetrically mounted on the preamplifier, a storage battery is mounted at the bottom inside the shell and electrically connected with a control panel, the preamplifier is electrically connected with the control panel, and the indicator lamp, the power-on reset key, the liquid crystal display and the buckling operation area are all connected with the control panel.
In a preferred embodiment of the present invention, the operation area includes a confirmation key, a return key, and a parameter adjustment key.
In a preferred embodiment of the present invention, the testing rods are inclined from the preamplifier, and the included angle between the two testing rods is 30-50 degrees.
In a preferred embodiment of the present invention, a windproof sponge cover is disposed outside the capacitive sensor.
In a preferred embodiment of the present invention, the bottom of the housing is provided with an RS232 output socket and a USB charging interface.
In a preferred embodiment of the present invention, the output socket is an RJ45 type socket.
In a preferred embodiment of the present invention, a USB indicator is further disposed at the bottom of the housing.
In a preferred embodiment of the present invention, the housing is made of ABS engineering plastic.
In a preferred embodiment of the present invention, the anti-slip protrusions are fixed to both the left and right side walls of the housing.
In a preferred embodiment of the present invention, the preamplifier is detachably connected to the top end of the housing through a knurled nut.
The utility model has the advantages that: this practical low decibel detection device sets up two test bars and has improved the sound source and gathered the rate of accuracy, receives when having solved the test to place the problem that position and angle influence have a little error, adopts digital detection technique, has improved the stability and the reliability that detect, and dynamic range is big, easy operation, light in weight, conveniently carry, and the usage is wide.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:
fig. 1 is a schematic structural diagram of a low decibel detection apparatus according to the present invention;
fig. 2 is a bottom schematic view of the low decibel detection apparatus of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a low decibel detection apparatus, comprising: the front surface of the shell 1 is provided with an overload indicator lamp 2, a power-on reset key 3, a liquid crystal display 4 and a button operation area, specifically, the operation area comprises a confirmation key 8, a return key 9 and a parameter adjusting key 10, the top end of the shell is provided with a preamplifier 5, in particular, the preamplifier is detachably connected with the top end of the shell through a knurled nut, the preamplifier is provided with a test rod 6, the top end of the test rod is provided with a capacitance sensor 7, the number of the test rods is two, the test rods are symmetrically arranged on the preamplifier, the bottom inside the shell is provided with a storage battery (not shown in the figure), the storage battery is electrically connected with the control panel, the preamplifier is electrically connected with the control panel, the indicator light, the power-on reset key, the liquid crystal display and the button operation area are all connected with the control panel.
Specifically, the test rods and the preamplifier are arranged in an inclined mode, the included angle between the two test rods is 30-50 degrees, the two test rods are aligned to the direction of a sound source, and the two test support rods detect noise at the position of the sound source, so that all-directional collection is achieved, and the collection accuracy is improved.
Specifically, the outer side of the capacitance sensor is provided with a wind-proof sponge cover 11, and when measurement is carried out in windy occasions, the wind-proof sponge cover can be used for reducing the influence of wind noise.
Specifically, the bottom of casing is provided with RS232 output socket 12 and the USB interface 13 that charges, and the bottom still is provided with USB pilot lamp 14, conveniently observes at any time whether the battery is full of the electricity, output socket adopts RJ45 type socket, can carry out remote control telemetering measurement with the computer online, also can realize that many the devices carry out the network deployment, measures simultaneously through computer control.
Specifically, the shell is made of ABS engineering plastics, so that the ABS plastic shell is attractive in appearance, light in weight and convenient to carry.
Specifically, the left side wall and the right side wall of the shell are both fixed with anti-skid protrusions 15, so that the detection device is convenient to grasp and prevented from being broken.
The working principle is as follows: the detection device is placed in a place where volume detection is needed, the two testing rods are aligned to the direction of a sound source, the two testing rods detect noise at the position of the sound source, omnibearing collection is achieved, a power-on reset key is turned on to start working, sound is converted into an electric signal through a capacitance sensor, the electric signal is subjected to impedance transformation through a preamplifier, a sound wave signal processing module is matched in a control panel, signals are received and processed, and the numerical value of the noise level is displayed on a liquid crystal display.
The utility model relates to a low decibel detection device's beneficial effect is: this practical low decibel detection device sets up two test bars and has improved the sound source and gathered the rate of accuracy, receives when having solved the test to place the problem that position and angle influence have a little error, adopts digital detection technique, has improved the stability and the reliability that detect, and dynamic range is big, easy operation, light in weight, conveniently carry, and the usage is wide.
The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all of which utilize the equivalent structure or equivalent flow transformation made by the content of the specification of the present invention, or directly or indirectly applied to other related technical fields, all included in the same way in the patent protection scope of the present invention.
Claims (10)
1. A low decibel detection apparatus, comprising: the testing device comprises a shell, wherein an overload indicator lamp, a power-on reset key, a liquid crystal display and a buckling operation area are arranged on the front surface of the shell, a preamplifier is arranged at the top end of the shell, a testing rod is mounted on the preamplifier, a capacitance sensor is mounted at the top end of the testing rod, the testing rods are symmetrically mounted on the preamplifier, a storage battery is mounted at the bottom inside the shell and electrically connected with a control panel, the preamplifier is electrically connected with the control panel, and the indicator lamp, the power-on reset key, the liquid crystal display and the buckling operation area are all connected with the control panel.
2. A low decibel detection device as claimed in claim 1, wherein said operation area comprises an enter key, a return key and a parameter adjustment key.
3. The low decibel measurement device according to claim 1, wherein the test rods are tilted with respect to the preamplifier, and the angle between the two test rods is 30-50 degrees.
4. The low decibel detection device according to claim 1, wherein a windproof sponge cover is placed on the outside of said capacitive sensor.
5. The low decibel detection device according to claim 1, wherein the bottom of said housing is provided with an RS232 output socket and a USB charging interface.
6. A low decibel detection device according to claim 5 wherein said output jack is an RJ45 type jack.
7. A low decibel measurement device according to claim 5, characterized in that a USB indicator is also provided on the bottom of said housing.
8. The low decibel measurement device according to claim 1, wherein said housing is made of ABS engineering plastic.
9. A low decibel measurement device as claimed in claim 1, wherein said housing has anti-slip protrusions fixed to both left and right side walls.
10. The low decibel detection device of claim 1, wherein said preamplifier is removably connected to the top of the housing by a knurled nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021523181.3U CN213209245U (en) | 2020-07-29 | 2020-07-29 | Low decibel detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021523181.3U CN213209245U (en) | 2020-07-29 | 2020-07-29 | Low decibel detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213209245U true CN213209245U (en) | 2021-05-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021523181.3U Active CN213209245U (en) | 2020-07-29 | 2020-07-29 | Low decibel detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213209245U (en) |
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2020
- 2020-07-29 CN CN202021523181.3U patent/CN213209245U/en active Active
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