Voltage signal wireless transmission device
A wireless transmission and voltage signal technology, applied in signal transmission systems, instruments, etc., can solve problems such as difficult wiring, difficult cables, and complicated lines, and achieve the effect of convenient detection and maintenance, reduction of construction difficulty, and simple interface circuit.
Inactive Publication Date: 2014-06-18
江苏红光仪表厂有限公司
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Problems solved by technology
There are usually the following defects in using wired methods to connect instruments and control systems: 1. High cost
Cables, bridges, safety barriers, isolators, compensating wires, DCS cards, and wire and cable laying space acquisitions cost a lot of money, the construction period is long, and labor costs are high. Wiring costs are the bottleneck restricting the application of wired measurement and control systems; 2. Maintenance difficulty
The wiring of traditional wired instruments is complicated. After a fault occurs, workers need to check one by one from the field instrument to the cable to the control room. The maintenance of the line is difficult, the construction period is long, and the efficiency is low. When the line is transformed, it is even more difficult to face thousands of cables. difficulty
3. Difficult to implement
When the measurement and control nodes are scattered and affected by geographical obstacles and environments such as rivers and railways, wiring is more difficult. In special occasions, such as rotary or mobile platforms such as cement rotary kilns, signal cables cannot be laid
Method used
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[0016] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings, which should not be construed as a limitation on the technical solution.
[0017] Such as figure 1 , 2 As shown, the circuit of the voltage signal wireless transmission device includes a power supply circuit, an AD conversion circuit, a main controller, an information storage and display circuit, and a wireless communication module; the circuit connection of the voltage signal wireless transmission device is as follows:
[0018] Power supply: AMS1117 3.3V regulator chip is selected to avoid unstable lithium battery voltage. The 3.3V power supply is filtered by C2, C3, C16, C17, C18, C19, C20, and C21. Pin 3 of AMS1117 is connected to the positive pole of the lithium battery and pin 1 is grounded. Pin 2 is connected to the signal positive pole VDD;
[0019] MCU: Choose the MSP430F149 chip from Texas Instruments, and use the standard Jtag interf...
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The invention discloses a voltage signal wireless transmission device. A circuit of the voltage signal wireless transmission device comprises a power supply circuit, an AD (analog / digital) conversion circuit, a mater controller, an information storage and display circuit and a wireless communication module; a voltage signal (0-5V) output by a field instrument is acquired, data information is sent by a transmitter module after temperature compensation, the response speed is high, AD conversion precision is high, the stability is high, after a wireless module is started, a network is autonomously formed without artificial configuration, and the field and remote mentoring can be conveniently performed simultaneously.
Description
technical field [0001] The invention relates to a voltage signal acquisition and conversion wireless transmission device, in particular to an industrial site voltage signal wireless transmission device. Background technique [0002] The collection of instrumentation signals plays a vital role in industrial automation systems. Every chain reaction and process control cannot be separated from the collection of field instrumentation measurement signals and feedback signals. In the traditional industrial field, the wiring methods between the instruments and meters at each point of the factory and the DCS and PLC in the control room adopt one-to-one physical connection or field bus. There are usually the following defects in connecting instruments and control systems in a wired manner: 1. The cost is high. Cables, bridges, safety barriers, isolators, compensating wires, DCS cards, and wire and cable laying space acquisitions cost a lot of money, the construction period is long, ...
Claims
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IPC IPC(8): G08C17/00
Inventor 史伟超陈云李伯全崔善超
Owner 江苏红光仪表厂有限公司