Method for realizing variable output power of fire bus and long-distance constant voltage power supply method
A bus output, fire protection technology, applied in the direction of AC network voltage adjustment, fire alarms, instruments, etc., can solve the problems of difficult to start normal and continuous work of terminal intelligent components, unbalanced energy of fire alarm system, poor stability, etc., to achieve voltage adjustment The method is flexible, overcomes the lack of voltage, and reduces the cost of wiring costs.
Active Publication Date: 2020-06-16
SICHUAN SAIKE SECURITY TECH CO LTD
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Problems solved by technology
[0005] The purpose of the present invention is to provide a method for realizing the variable power output of the fire bus and the long-distance constant voltage power supply method composed of it, which mainly solves the problems in the prior art that the terminal intelligent components are difficult to start and continue to work normally, and the fire alarm system Problems such as energy imbalance and poor stability
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[0021] The present invention will be further described below with reference to the accompanying drawings and examples, and the embodiments of the present invention include but not limited to the following examples.
[0022] Based on the design idea described in the patent application number 201710113010X and the invention name is a fire protection industrial bus coding method, the present invention pioneers a design that can realize the output variable power of the fire protection bus, and on this basis, additionally A method for realizing long-distance constant-voltage power supply of the fire bus is provided, thereby solving the problems in the prior art that the terminal intelligent components are difficult to work normally, the energy of the fire alarm system is unbalanced, and the stability is poor.
[0023] Such as figure 1 As shown, the present invention realizes the flow process of fire bus output variable power as follows:
[0024] (1) Adjust the duty cycle of the lo...
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The invention discloses a fire-fighting bus variable power output implementation method and a formed long-distance constant-voltage power supply method thereof. The fire-fighting bus variable power output implementation method comprises the steps that (1) the duty ratio of low-level pulses is adjusted in any coding cycle; and (2) the duty ratio of the low-level pulses in other coding cycles is adjusted in turn according to the mode of the step (1) so that the fire-fighting bus is enabled to integrally output variable power. The long-distance constant-voltage power supply method comprises the steps that (1) the intelligent components hung on the fire-fighting bus acquire the lost voltage information and data to be uploaded to a fire alarm controller; and (2) the fire alarm controller controls the fire-fighting bus to output the variable power so as to realize real-time adjustment of the voltage of the intelligent components. The design is ingenious and the cost is low, normal starting and continuous working of the terminal intelligent components can be ensured without changing the hardware design and the stability of the whole fire alarm system can be enhanced.
Description
technical field [0001] The invention relates to the technical field of fire protection, in particular to a method for realizing variable output power of a fire protection bus and a long-distance constant voltage power supply method formed by the method. Background technique [0002] The fire alarm system is generally composed of a fire alarm controller, intelligent components and external equipment. The fire alarm system uses two buses for power supply and data transmission based on the bus. It has low investment cost and is easy to install. It is widely used in fire communication transmission. However, There is bound to be a certain impedance in the bus power supply line, causing the voltage of the fire alarm to decrease with the increase of the bus length, that is, the voltage drop, causing the voltage of the fire alarm to be lower than the working voltage of the terminal equipment, causing the terminal equipment to fail to work normally. [0003] At present, in order to s...
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IPC IPC(8): H02J3/28H02J3/12G08B17/00
CPCG08B17/00H02J3/12H02J3/28
Inventor 不公告发明人
Owner SICHUAN SAIKE SECURITY TECH CO LTD