CN212850532U - Network protection test system - Google Patents
Network protection test system Download PDFInfo
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- CN212850532U CN212850532U CN202021344398.8U CN202021344398U CN212850532U CN 212850532 U CN212850532 U CN 212850532U CN 202021344398 U CN202021344398 U CN 202021344398U CN 212850532 U CN212850532 U CN 212850532U
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Abstract
The utility model provides a network protection test system, it is including the microphone, first resistance and second resistance one end, the second transports the 4 th foot of amplifier and connects the back power inlet wire, the first resistance other end connects the microphone after being connected with first electric capacity one end, the microphone other end is exported, the first electric capacity other end is connected with fourth resistance one end, the fourth resistance other end is connected with fifth resistance one end after being connected with the first 3 rd foot that transports the amplifier, the second resistance other end respectively with third resistance one end, fourth electric capacity one end is connected the back and is transported the 12 th foot of amplifier with the second and be connected, the first 1 st foot and the sixth resistance one end that transport the amplifier are connected. Rational in infrastructure, excellent in use effect after this scheme of adoption.
Description
Technical Field
The utility model belongs to the technical field of the intelligent control technique and specifically relates to indicate network protection test system.
Background
When the traditional network protection is assembled, all parts need to be tested, particularly, sound testing needs to be carried out at a far place for sound distinguishing and receiving, and the volume received by a normal microphone is small.
Disclosure of Invention
An object of the utility model is to overcome prior art not enough, provide a network protection test system rational in infrastructure, excellent in use effect.
In order to achieve the above object, the present invention provides a technical solution: the network protection test system comprises a microphone, a first resistor, one end of a second resistor and a pin 4 of a second conveying amplifier are connected with a power inlet wire, the other end of the first resistor is connected with one end of a first capacitor and then connected with the microphone, the other end of the microphone is output, the other end of the first capacitor is connected with one end of a fourth resistor, the other end of the fourth resistor is connected with one end of a fifth resistor and then connected with a pin 3 of the first conveying amplifier, the other end of the second resistor is respectively connected with one end of a third resistor and one end of a fourth capacitor and then connected with a pin 12 of the second conveying amplifier, a pin 1 of the first conveying amplifier is connected with one end of a sixth resistor, the other end of the sixth resistor is respectively connected with one end of a seventh resistor, the 13 th pin of the second transmission amplifier is connected, the other end of the seventh resistor is connected with the 14 th pin of the second transmission amplifier and one end of the fifth capacitor, and the other end of the fifth capacitor outputs.
The fourth capacitor is connected with the 2 nd pin of the first conveying amplifier.
The other end of the fifth resistor is connected with the 1 st pin of the first conveying amplifier.
After the above technical scheme is adopted, R1= R2, the value range is between 10K- - -100K, connects loudspeaker or megaphone at fifth electric capacity, microphone output, and the sound is received the back and is sent into the amplifier and enlargies. The amplifier consists of two stages, the first stage consists of one of the LM324 four operational amplifiers with an amplification amount of 110 times the gain, and the second stage consists of the other operational amplifier with an amplification amount of 500 times the gain. The high amplification capacity is enough to amplify the extremely weak sound signal and output the signal by the output end. Thereby hear the faint sound of very far place, especially the sound of each monitoring point at night when making the network protection test, this scheme can directly assemble in a shell, connects the output on the audio line, carries out remote conduction, rational in infrastructure, excellent in use effect after this scheme of adoption.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The present invention will be further explained with reference to the drawings, and the preferred embodiment of the present invention is: referring to fig. 1, the network protection testing system according to this embodiment includes a microphone MIC, a first resistor R1 and one end of a second resistor R2, a second transport amplifier LM324D with a 4 th pin connected to a rear power supply line, a first resistor R1 with the other end connected to one end of a first capacitor C1 and then connected to the microphone MIC, and the other end of the microphone MIC outputs, a first capacitor C1 with the other end connected to one end of a fourth resistor R4, a fourth resistor R4 with the other end connected to one end of a fifth resistor R5 and then connected to a 3 rd pin of a first transport amplifier LM324A, a second resistor R2 with the other end connected to one end of a third resistor R3 and one end of a fourth capacitor C4 and then connected to a 12 th pin of a second transport amplifier LM D, a fifth resistor R5 with the other end connected to a 1 st pin of a first transport amplifier LM324 LM A, a fourth capacitor C6 connected to a 2 nd pin of a first transport amplifier LM A, and a first resistor LM 324R 73727 with one end of a sixth resistor LM 6, the other end of the sixth resistor R6 is connected to one end of the seventh resistor R7 and the 13 th pin of the second transfer amplifier LM324D, respectively, the other end of the seventh resistor R7 is connected to the 14 th pin of the second transfer amplifier LM324D and one end of the fifth capacitor C5, and the other end of the fifth capacitor C5 outputs.
After the scheme is adopted in the embodiment, R1= R2 has a value range of 10K to 100K, a horn or a loudspeaker is connected to the output end of the fifth capacitor and the microphone, and sound is received and then sent to an amplifier for amplification. The amplifier consists of two stages, the first stage consists of one of the LM324 four operational amplifiers with an amplification amount of 110 times the gain, and the second stage consists of the other operational amplifier with an amplification amount of 500 times the gain. The high amplification capacity is enough to amplify the extremely weak sound signal and output the signal by the output end. Thereby hear the faint sound of very far place, especially the sound of each monitoring point at night during messenger's network protection test, this scheme can directly assemble in a shell, connects the output on the audio line, carries out remote conduction, rational in infrastructure, excellent in use effect after the adoption this embodiment.
The above-mentioned embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so that all the changes made according to the shape and principle of the present invention should be covered within the protection scope of the present invention.
Claims (3)
1. Network protection test system, it is including Microphone (MIC), its characterized in that: a first resistor (R1) is connected with one end of a second resistor (R2) and the 4 th pin of a second conveying amplifier (LM 324D) and then connected with a power supply inlet wire, the other end of the first resistor (R1) is connected with one end of a first capacitor (C1) and then connected with a Microphone (MIC), the other end of the Microphone (MIC) outputs, the other end of a first capacitor (C1) is connected with one end of a fourth resistor (R4), the other end of the fourth resistor (R4) is connected with one end of a fifth resistor (R5) and then connected with the 3 rd pin of a first conveying amplifier (LM 324A), the other end of the second resistor (R2) is respectively connected with one end of a third resistor (R3) and one end of a fourth capacitor (C4) and then connected with the 12 th pin of a second conveying amplifier (LM 324D), the 1 st pin of the first conveying amplifier (LM 324A) is connected with one end of a sixth resistor (R6), the other end of the sixth resistor (R6) is respectively connected with the second resistor (LM 7 4, the seventh resistor (LM 324D), the other end of the seventh resistor (R7) is connected to the 14 th pin of the second transfer amplifier (LM 324D) and one end of the fifth capacitor (C5), and the other end of the fifth capacitor (C5) outputs.
2. The network defense test system of claim 1, wherein: the fourth capacitor (C4) is connected to pin 2 of the first convey amplifier (LM 324A).
3. The network defense test system of claim 1, wherein: the other end of the fifth resistor (R5) is connected to pin 1 of the first forwarding amplifier (LM 324A).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021344398.8U CN212850532U (en) | 2020-07-10 | 2020-07-10 | Network protection test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021344398.8U CN212850532U (en) | 2020-07-10 | 2020-07-10 | Network protection test system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212850532U true CN212850532U (en) | 2021-03-30 |
Family
ID=75114410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021344398.8U Active CN212850532U (en) | 2020-07-10 | 2020-07-10 | Network protection test system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212850532U (en) |
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2020
- 2020-07-10 CN CN202021344398.8U patent/CN212850532U/en active Active
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