An emergency communication host with both internal and external communication functions

Abstract

The invention discloses an emergency communication host with both internal and external communication functions, including a host housing, an intercom button, an intercom handle, a power circuit, an internal and external communication circuit of the host, and an intercom handle communication circuit. The power circuit includes a rechargeable battery, Isolated single-ended flyback switching power supply step-down circuit, rechargeable battery, power switching circuit, battery charging circuit, battery protection circuit, battery voltage detection circuit, non-isolated Boost circuit, linear voltage regulator circuit and extension voltage supply control circuit , The internal and external call circuits of the host include GSM module, SIM card holder, GSM antenna, watchdog circuit, reset circuit, voice signal processing circuit, call for help signal detection circuit, handle on-hook detection button circuit, buzzer circuit, low battery indication Circuit and GSM network signal indicating circuit. The invention is easy to install and use, has fast voice response speed, high call quality, high work reliability, and can realize 24-hour emergency call.

Description

technical field [0001] The invention belongs to the technical field of emergency communication equipment, and in particular relates to an emergency communication host with both internal and external communication functions. Background technique [0002] With the rapid development of the national economy, the construction of labor-intensive industrial and mining enterprises and industrial plants has increased, the urban population density has risen sharply, and high-rise residential buildings have continued to increase. Emergency communication equipment in mines, tunnels, factories, high-rise buildings, shafts, and confined spaces Become the last line of defense for the lives of trapped people, so the performance and use of emergency communication equipment is particularly important to save lives. [0003] The emergency communication equipment maturely used in the existing market is usually a direct-press intercom system, which uses wires or optical cables as communication tr...

AI Technical Summary

Problems solved by technology

[0004] 1. This type of emergency communication connection system, in addition to the four common lines of the transmitting line, the receiving line, the unlocking line and the ground line, each communication point needs a call connection line, the wiring is complicated, and it is a closed wiring that cannot be integrated into the complex If the distance of the call location is long and the number of monitoring points is large, the wiring construction will be more difficult, the construction period of the laying line will be long, and switching equipment is required for outbound public calls, and the maintenance cost of the line will be high;

[0005] 2. The transmission distance is limited, and the signal attenuation of long-distance communication is serious;

[0006] 3. The personnel in the duty room must be on duty 24 hours a day, 24-hour emergency calls cannot be realized, and the service cost is high;

[0007] 4. There is no SMS alarm function, and multi-mode reliability alarms cannot be achieved;

[0008] 5. The anti-interference ability is poor. When there is external interference, the call quality will become unclear and cannot meet the needs of users;

[0009] 6. The scalability of the product is poor. Once the system is established, the positions of the emergency communication hosts and the communication points of all parties cannot be changed. The reconstruction of the line for subsequent location changes has caused great cost hidden dangers, and due to technical reasons , product upgrades or expansions have greater limitations

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