CN201639629U

CN201639629U - Amplified phone device using CAN bus

Info

Publication number: CN201639629U
Application number: CN2010201421202U
Authority: CN
Inventors: 李勇; 姚立权; 席伟; 陈兴宝; 陈金鹏; 宫富章; 刘永刚
Original assignee: Sany Heavy Equipment Co Ltd
Current assignee: Sany Heavy Equipment Co Ltd
Priority date: 2010-03-26
Filing date: 2010-03-26
Publication date: 2010-11-17
Anticipated expiration: 2020-03-26

Abstract

The utility model relates to an amplified phone device using a CAN bus, which comprises a single chip microcomputer, a CAN transceiver drive module, an address dip switch, a locking button and a power supply module, wherein the input end of the single chip microcomputer is connected with the address signal of the address dip switch, the locking signal of the locking button and the power supply voltage signal of the power supply module, and the single chip microcomputer is in communication connection with a master control board through the CAN transceiver drive module. The utility model has the advantages that the CAN bus can detect whether the power supply is normal when the CAN bus detects the locking signal, the location number of the phone can be detected in real time, the replacement is convenient and the address number is only required to be set on a communication board through the dip switch.

Description

A kind of hands free telephone device of using the CAN bus

Technical field

The utility model relates to a kind of hands free telephone, a kind of specifically hands free telephone device of using the CAN bus.

Background technology

At present, known hands free telephone is by dtmf signal, and external five core bands shielding pulling force cable communicates.Hands free telephone internal battery, the communicating circuit plate that seals amplifier and have master controller; Five core bands shielding pulling force cable is by two power line (18V, 0V), tone frequency channel wire, locking line and dtmf signal transmission line are formed, the hands free telephone signal of communication is the dual tone multi-frequency dtmf signal, each phone all sends dtmf signal, the decoder of master control borad is demodulated to digital signal with this dtmf signal, and the CPU of master control borad can discern which phone and the residing state of this phone by this signal.The hands free telephone device software and hardware of this structure is complicated, the position that can not measure block signal very soon, and whether the power supply that can not detect every phone easily is normal, makes troubles for user's use, and phone limited amount along the line generally is no more than 25.

The utility model content

At the above-mentioned hands free telephone that exists in the prior art use inconvenience, quantity along the line is few and etc. weak point, the technical problems to be solved in the utility model provides a kind of just with the hands free telephone device that makes things convenient for, can increase the application CAN bus of phone quantity along the line.

For solving the problems of the technologies described above, the technical solution adopted in the utility model is:

The hands free telephone device that the utility model is used the CAN bus comprises: single-chip microcomputer, CAN transceiver driver module, address toggle switch, latch buttons and power module, wherein the input of single-chip microcomputer is connected to the address signal of address toggle switch, the block signal of latch buttons and the power supply voltage signal of power module, and single-chip microcomputer carries out communication by CAN transceiver driver module and master control borad and is connected.

Described single-chip microcomputer and CAN transceiver driver module, 7 core cables are adopted in the connection between address toggle switch, latch buttons and the power module; Described address toggle switch adopts 7; Described power module comprises first power module and second source module, and wherein the second source module is located at the output of first power module, and the direct voltage that first power module is exported further converts required DC power supply to.

The utlity model has following beneficial effect and advantage:

1. detecting block signal simultaneously by the CAN bus, whether the power supply that can also detect on the communication board is normal;

2. when by latch buttons, can detect the location number of phone in real time;

3. when phone broke down, it was convenient to change, and only needed by toggle switch address number to be set on communication board and got final product;

4. each phone is provided with address number by toggle switch, can hang 30 (limited by power supply) platform phone at most along the line.

Description of drawings

Fig. 1 is the utility model circuit theory diagrams;

Fig. 2 is the utility model winding diagram.

Embodiment

The hands free telephone system comprises the phone housing, communication board, the sealing amplifier, loud speaker, limit switch, latch buttons, Mike, by saying button, indicator light, the utility model is used the hands free telephone device of CAN bus and is located on the communication board of hands free telephone system, as shown in Figure 1, comprise: single-chip microcomputer U1, CAN transceiver driver module U2, address toggle switch U3, latch buttons and power module, wherein the input of single-chip microcomputer U1 is connected to the address signal of address toggle switch U3, the block signal of latch buttons, and the power supply voltage signal of power module, single-chip microcomputer U1 carries out communication by CAN transceiver driver module U2 with master control borad and is connected.Single-chip microcomputer U1 and CAN transceiver driver module U2,7 core cables are adopted in the connection between address toggle switch U3, latch buttons and the power module; Address toggle switch U3 adopts 7, and present embodiment is 7; Power module comprises the first power module U4 and second source module U5, and wherein second source module U5 is located at the output of the first power module U4, and the direct voltage that the first power module U4 is exported further converts required DC power supply to.

In the present embodiment, single-chip microcomputer U1 adopts 8051F047, carries the CAN interface.It gathers the address signal of toggle switch U3, the block signal and the power supply voltage signal of latch buttons, and each signal is sent to master control borad by CAN transceiver driver module U2; The first power module U4 adopts LM2576, and it is converted to DC5V with DC24V; Second source module U5 adopts LD1117, and it is converted to DC3.3V with DC5V.

The 1st～3 resistance R 6 among Fig. 1, R7, R8 are divider resistance; 6 pin of connector socket J2 connect the indicator light at phone two ends, if latch buttons is pressed then this indicator light flicker; 5 pin are the block signal line, and 3 pin and 4 pin are the CAN holding wire, and 1 pin and 2 pin are power line; Last phone will be the 8th connection of toggle switch, the 8th disconnection of phone toggle switch before this (120 Ohmic resistances that connect on the communication board on last phone on the CAN bus will connect by toggle switch, and this is that CAN transceiver driver module U2 requires); Luminous tube D3 is located at the output pin of single-chip microcomputer U1, uses when debugging, and later on need not.

The utility model adopts the CAN bus communication, and cable is seven heart yearns, is respectively 2 24 volts of power lines, 2 CAN lines, 2 block signal lines, 1 audio signal wire.If block signal is arranged, after single-chip microcomputer U1 detects this signal, U2 is sent to master control borad through the CAN bus by CAN transceiver driver module, can measure the address number (on off operating mode that refers to toggle switch in the utility model) of hands free telephone, and whether the voltage that can detect on the communication board is normal.Each communication board is provided with address number by address toggle switch U3.

As shown in Figure 2, J1 (a) is the import connector socket, and J1 (b) is the outlet connector socket, 1 pin and 2 pin of import and outlet connector socket are power supply, and 3 pin and 4 pin are the CAN signal, and 5 pin connect the latch switch normally-closed contact, 6 pin and 5 pin constitute the loop, and 7 pin are audio signal.Sealing amplifier in the phone casing connects 24 volts of power supplys, audio signal, call button, press-to-talk switch, transmitter, loud speaker.

Claims

1. hands free telephone device of using the CAN bus, it is characterized in that comprising: single-chip microcomputer (U1), CAN transceiver driver module (U2), address toggle switch (U3), latch buttons and power module, wherein the input of single-chip microcomputer (U1) is connected to the address signal of address toggle switch (U3), the block signal of latch buttons and the power supply voltage signal of power module, and single-chip microcomputer (U1) carries out communication by CAN transceiver driver module (U2) and master control borad and is connected.

2. by the hands free telephone device of the described application of claim 1 CAN bus, it is characterized in that: described single-chip microcomputer (U1) and CAN transceiver driver module (U2), 7 core cables are adopted in the connection between address toggle switch (U3), latch buttons and the power module.

3. by the hands free telephone device of the described application of claim 1 CAN bus, it is characterized in that: described address toggle switch (U3) adopts 7.

4. by the described hands free telephone device of using the CAN bus of claim 1, it is characterized in that: described power module comprises first power module (U4) and second source module (U5), and wherein second source module (U5) is located at the output of first power module (U4).