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Audio acquisition and processing circuit for vehicle-mounted talkback system

A technology for audio collection and vehicle intercom. It is applied in transducer circuits, two-way line system stations, electrical components, etc. It can solve the problems of cumbersome wiring of analog intercom systems and long system debugging period, and is easy to popularize and use. , the effect of short debugging cycle and simple structure

Inactive Publication Date: 2012-08-22
ANNAX SUZHOU RAIL SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the vehicle-mounted intercom system used in urban rail transit has the disadvantage of a long debugging period, and most trains have adopted an analog intercom system due to the low cost, but the wiring of the analog intercom system is relatively low. It is cumbersome, and there will be many uncertain interference factors due to the specific environment of the site, etc.

Method used

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  • Audio acquisition and processing circuit for vehicle-mounted talkback system
  • Audio acquisition and processing circuit for vehicle-mounted talkback system
  • Audio acquisition and processing circuit for vehicle-mounted talkback system

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Embodiment Construction

[0014] The technical implementation process of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0015] see figure 1 As shown, a kind of audio collection and processing circuit that is used for vehicle-mounted intercom system comprises a handle interface 1, and described handle interface 1 is respectively connected with a collection circuit 2 and amplifying circuit 3, and described collection circuit 2 and amplifying circuit 3 are connected in On a controller 4, the controller 4 is connected with an SDRAM memory 7 and a Flash memory 8, and the controller 4 is also connected with an Ethernet interface 6.

[0016] Further, the controller 4 is also connected with an RS232 interface 5 .

[0017] see figure 2 As shown, the acquisition circuit 2 includes a first resistor R1, a second resistor R2, a photocoupler U1 and a regulator tube DA1, one end of the first resistor R1 is connected to the handle interface 1, ...

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PUM

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Abstract

The invention discloses an audio acquisition and processing circuit for a vehicle-mounted talkback system. The audio acquisition and processing circuit comprises a microphone interface, wherein the microphone interface is respectively connected with an acquisition circuit and an amplifying circuit; the acquisition circuit and the amplifying circuit are connected to a controller which is connected with an SDRAM (Synchronous Dynamic Random Access Memory) and a Flash memory and is also connected with an Ethernet interface; and further, the controller is also connected with an RS232 interface. The audio acquisition and processing circuit disclosed by the invention has the advantages of simple structure, simple wiring and short debugging period and is beneficial to the promotion and application of the vehicle-mounted talkback system.

Description

technical field [0001] The invention belongs to the technical field of vehicle-mounted intercom systems for urban rail transit, and in particular relates to an audio collection and processing circuit for vehicle-mounted intercom systems. Background technique [0002] At present, the vehicle-mounted intercom system used in urban rail transit has the disadvantage of a long debugging period, and most trains have adopted an analog intercom system due to the low cost, but the wiring of the analog intercom system is relatively low. It is cumbersome, and there will be many uncertain interference factors due to the specific environment on site. Contents of the invention [0003] In order to overcome the deficiencies in the prior art, the object of the present invention is to provide an audio collection and processing circuit for a vehicle-mounted intercom system. The audio collection and processing circuit has simple wiring and a short debugging period. [0004] In order to solve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R3/00H04Q5/24
Inventor 艾培德
Owner ANNAX SUZHOU RAIL SYST
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