Summary of the invention
It is an object of the invention to overcome in the parameter measurement process of current industry spot process control, analogue signal poor anti jamming capability, poor stability, wiring is complicated, control mode is a single difficult problem, it is provided that the transmission method of a kind of industry spot digital signal.
The purpose of the present invention is achieved through the following technical solutions:
A kind of transmission method of industry spot digital signal, including the data acquisition module being sequentially connected with, data processing module, data conversion module, Data Control terminal, also include the power module being connected respectively with data acquisition module, data processing module, data conversion module.
Data processing module and data conversion module connected mode have two kinds:
The first: described data processing module and 485 transducers are connected with data conversion module by fieldbus after connecting.
Described power module is connected with data acquisition module by the output circuit that boosts, and power module is connected with data processing module by low pressure difference linearity demodulator, and power module is also connected with 485 transducers, data conversion module respectively.
The second: be connected with signal emission module, transmitting antenna on described data processing module in turn, being connected with reception antenna, signal receiving module on described data conversion module in turn, data processing module is connected with data conversion module by radio signal.
Power module is connected with data acquisition module by the output circuit that boosts, power module is connected with data processing module by low pressure difference linearity demodulator, power module is connected with signal emission module by linear voltage regulator, and power module is also connected with signal receiving module, data conversion module respectively.
Adopt both the above connected mode, it is possible to give full play to its adaptability, under different geographical environmental conditions, adopt suitable mode, enhance the use scope of native system.
Described data processing module is single-chip microcomputer, and this single-chip microcomputer belongs to MSP430 super low power consuming single chip processor series. Adopting the single-chip microcomputer data processing module as native system of super low consumption series, its volume is less, energy consumption is lower, adds the working time of power supply.
Described Data Control terminal is host computer. On-the-spot environment can be monitored by host computer in control room at any time, and can pass through host computer on-the-spot fuel gas carries out concentration measurement and control, and carries out drawing right in its suitable concentration range, and native system is carried out anti-explosion safety protection.
Described power module is lithium battery group. In order to reduce volume, alleviate the weight of native system, adopt lithium battery group as the power supply of native system.
Operation principle:
Data acquisition module is by on-the-spot pressure, temperature, the physical parameters such as humidity pass through sensor acquisition, 4��20mA current signal of outputting standard, 4��20mA current signal is entered over-sampling switch and is converted to digital signal by the single-chip microcomputer of data processing module, digital signal transmits after being changed into 485 signals by 485 transducers to data conversion module, or by wireless transmission to data conversion module, 485 signals are converted to 232 signals by data conversion module, then it is reconverted into usb signal to transmit to Data Control terminal, display, storage, computings etc. process, realize remotely monitoring.
It is entity module with upper module, for instance: data acquisition module is selected from the DG1300-GE-A-2-150 series sensor of Sen Nashi company; Data processing module is selected from MSP430 super low power consuming single chip processor series; Signal emission module is selected from DTD465A; Signal receiving module is selected from DTD465A; Data conversion module is selected from: RS-232 RS-485, RS-232 RS-USB; Boosting output circuit is selected from: 34063 chips; Low pressure difference linearity demodulator is selected from: AMS1117_3.3; Linear voltage regulator is selected from: AMS1117_ADJ.
The present invention compared with prior art, has such advantages as and beneficial effect:
The transmission method of 1 a kind of industry spot digital signal of the present invention, the analogue signal gathered by data acquisition module transmits after being converted into digital signal, and its capacity of resisting disturbance is strong, signal stabilization;
The transmission method of 2 a kind of industry spot digital signals of the present invention, adopts the transmission means of field data bus, decreases connection, it is simple to construction;
The transmission method of 3 a kind of industry spot digital signals of the present invention, has single-chip microcomputer and host computer, it is possible to regulate and control at the scene, it is also possible to carry out remotely monitoring at master control room by field data bus:
The transmission method of 4 a kind of industry spot digital signals of the present invention, adopts safety anti-explosive remotely to monitor, safety and reliability.
Embodiment
As shown in Figure 1, the present invention includes the data acquisition module, data processing module, 485 transducers, data conversion module and the Data Control terminal that are sequentially connected with, power module is connected with data acquisition module by the output circuit that boosts, power module is connected with data processing module by low pressure difference linearity demodulator, and power module is also connected with 485 transducers, data conversion module respectively; Being connected with signal emission module, transmitting antenna in turn on data processing module simultaneously, be connected with reception antenna, signal receiving module on data conversion module in turn, data processing module is connected with data conversion module by radio signal.
Work process:
The 8 road signals gathered are sent to single-chip microcomputer by sensor, single-chip microcomputer enters over-sampling switch and converts analog signals into digital signal, digital signal transmits signal conversion module by field data bus or wireless transmission method, 485 level signals are converted to 232 level signals by signal conversion module, it is then converted into usb signal to transmit to Data Control terminal, digital signal displayed by Data Control terminal, store, the operation such as computing, and by field data bus or wireless transmission method, scene is remotely monitored.
As it has been described above, the present invention just can well be realized.