CN103398772A - Passenger compartment noise monitor - Google Patents
Passenger compartment noise monitor Download PDFInfo
- Publication number
- CN103398772A CN103398772A CN2013103567936A CN201310356793A CN103398772A CN 103398772 A CN103398772 A CN 103398772A CN 2013103567936 A CN2013103567936 A CN 2013103567936A CN 201310356793 A CN201310356793 A CN 201310356793A CN 103398772 A CN103398772 A CN 103398772A
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- Prior art keywords
- operational amplifier
- noise
- triode
- circuit
- capacitor
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Abstract
The invention provides a passenger compartment noise monitor which comprises an internal noise detection circuit and a peripheral circuit which are connected, wherein the internal noise detection circuit comprises an operation amplifier and a noise probe; the noise probe is connected with the input end of the operation amplifier through a capacitor; an power supply pin Vcc of the operation amplifier is connected with a power supply pin Vee of the operation amplifier through another capacitor; the output end of the operation amplifier is connected with a base electrode of a triode; the collecting electrode of the triode is connected with the power supply pin Vcc of the operation amplifier through a resistor, and the emitting electrode of the triode is connected with the power supply pin Vee of the operation amplifier through another resistor; the peripheral circuit is a rectifier bridge circuit, interfaces A and B can be led out from the input end of the peripheral circuit, and the output end of the peripheral circuit is connected with the internal noise detection circuit. The interfaces A and B of the noise monitor can be connected with a power supply at will, and the equipment cannot be damaged; the passenger compartment noise monitor has the advantages of simple structure, convenience in installation, low production cost, simplicity and convenience in operation, control and use, high stability and the like.
Description
Technical field
The invention belongs to the noise monitoring field, especially relate to a kind of passenger compartment noise monitor.
Background technology
At light rail, in the public voice broadcast service system of the field of traffic such as subway, in each compartment, guest room, two noise monitor devices are set, be used for measuring the environmental noise of guest room, the environmental noise that the noise monitor device will measure transfers to the power amplifier in guest room, is automatically adjusted the volume of broadcasting by power amplifier.Traditional noise monitor complex interfaces, mainly contain power lead, the noise tone frequency channel wire, and control lines etc., exist the interface load construction and installation inconvenient, and cable increases the technical matterss such as cost.
Summary of the invention
The problem to be solved in the present invention is to provide a kind of passenger compartment noise monitor simple in structure, easy to use, is particluarly suitable for light rail, uses in the public voice broadcast service system of the field of traffic such as subway.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of passenger compartment noise monitor, comprise make an uproar inspection internal circuit and peripheral circuit, and the described inspection internal circuit of making an uproar is connected with described peripheral circuit;
the described inspection internal circuit of making an uproar comprises operational amplifier, the noise probe, described noise probe is connected with the negative pole of capacitor C 1, the positive pole of described capacitor C 1 is connected with the input end of operational amplifier, the power Vcc pin of described operational amplifier is connected with the positive pole of capacitor C 2, the negative pole of described capacitor C 2 is connected with the power supply Vee pin of described operational amplifier, the output terminal of described operational amplifier is connected with the base stage of triode, the collector of described triode is connected with the power Vcc pin of operational amplifier by resistance R 1, the emitter of described triode is connected with the power supply Vee pin of operational amplifier by resistance R 2,
Described peripheral circuit is the rectifier circuit that four diodes form, the input end of described rectifier circuit is drawn interface A and interface B, an output terminal of described rectifier circuit is connected with the collector of triode, and another output terminal of described rectifier circuit is linked between the negative pole of resistance R 2 and capacitor C 2.
Advantage and good effect that the present invention has are: owing to adopting technique scheme, the A of noise monitor, B can connect arbitrarily, can damage equipment, and can work, each noise monitor is by one two core cable transmission power supply and noise signal, and circuit is simple and reliable; Have simple in structurely, easy for installation, production cost is low, operation, control, easy to use, stability advantages of higher.
Description of drawings
Fig. 1 is the schematic diagram of a kind of passenger compartment noise monitor of the present invention.
Embodiment
As shown in Figure 1, a kind of passenger compartment noise monitor of the present invention, comprise make an uproar inspection internal circuit and peripheral circuit, and the described inspection internal circuit of making an uproar is connected with described peripheral circuit;
the described inspection internal circuit of making an uproar comprises operational amplifier, the noise probe, described noise probe is connected with the negative pole of capacitor C 1, the positive pole of described capacitor C 1 is connected with the input end of operational amplifier, the power Vcc pin of described operational amplifier is connected with the positive pole of capacitor C 2, the negative pole of described capacitor C 2 is connected with the power supply Vee pin of described operational amplifier, the output terminal of described operational amplifier is connected with the base stage of triode, the collector of described triode is connected with the power Vcc pin of operational amplifier by resistance R 1, the emitter of described triode is connected with the power supply Vee pin of operational amplifier by resistance R 2,
Described peripheral circuit is the rectifier circuit that four diodes form, the input end of described rectifier circuit is drawn interface A and interface B, an output terminal of described rectifier circuit is connected with the collector of triode, and another output terminal of described rectifier circuit is linked between the negative pole of resistance R 2 and capacitor C 2.
the course of work of this example: during use, after interface A or B connection power supply, enter rectifier circuit, export by the collector of operational amplifier and triode after picking up noise by electret, the load circuit of triode is on the digital power amplifier plank, then output to power amplifier noise monitoring circuit, output after environmental noise can being amplified, each noise monitor is by one two core cable transmission power supply and noise signal, circuit is simple and reliable, four diodes form rectifier circuit, realize A, B interface connects arbitrarily, the input power of whole equipment, the output noise audio frequency is all by interface A, B realizes.
Above one embodiment of the present of invention are had been described in detail, but described content is only preferred embodiment of the present invention, can not be considered to be used to limiting practical range of the present invention.All equalizations of doing according to the present patent application scope change and improve etc., within all should still belonging to patent covering scope of the present invention.
Claims (1)
1. passenger compartment noise monitor is characterized in that: comprising make an uproar inspection internal circuit and peripheral circuit, the described inspection internal circuit of making an uproar is connected with described peripheral circuit;
the described inspection internal circuit of making an uproar comprises operational amplifier, the noise probe, described noise probe is connected with the negative pole of capacitor C 1, the positive pole of described capacitor C 1 is connected with the input end of operational amplifier, the power Vcc pin of described operational amplifier is connected with the positive pole of capacitor C 2, the negative pole of described capacitor C 2 is connected with the power supply Vee pin of described operational amplifier, the output terminal of described operational amplifier is connected with the base stage of triode, the collector of described triode is connected with the power Vcc pin of operational amplifier by resistance R 1, the emitter of described triode is connected with the power supply Vee pin of operational amplifier by resistance R 2,
Described peripheral circuit is the rectifier circuit that four diodes form, the input end of described rectifier circuit is drawn interface A and interface B, an output terminal of described rectifier circuit is connected with the collector of triode, and another output terminal of described rectifier circuit is linked between the negative pole of resistance R 2 and capacitor C 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103567936A CN103398772A (en) | 2013-08-15 | 2013-08-15 | Passenger compartment noise monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103567936A CN103398772A (en) | 2013-08-15 | 2013-08-15 | Passenger compartment noise monitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103398772A true CN103398772A (en) | 2013-11-20 |
Family
ID=49562441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013103567936A Pending CN103398772A (en) | 2013-08-15 | 2013-08-15 | Passenger compartment noise monitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103398772A (en) |
-
2013
- 2013-08-15 CN CN2013103567936A patent/CN103398772A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131120 |