Radio transmission apparatus for the high-tension cable on-line monitoring based on the on-line monitoring of cable device of the wireless transmission of MG323.Measurement parameter comprises: the grounding circulation (capacitive current) of A, B, C three-phase, total ground current, a phase running current.
Traditional detection method is when the cable interruption maintenance, and the monitoring personnel detect one by one to field by using off-line measurement instrument, has that measuring period is long, the surveying work amount is large, measurement data is few, does not have the inherent defect such as continuity.
Therefore, instantly need a urgent technical matters that solves to be exactly: how can propose a kind of effective measures, to satisfy more practical application request.
The utility model content
Technical problem to be solved in the utility model provides a kind of on-line monitoring of cable device of the wireless transmission based on MG323, is used for shortening monitoring periods, reduces the test job amount.
In order to solve the problems of the technologies described above, the utility model provides a kind of on-line monitoring of cable device of the wireless transmission based on MG323, the branch road that specifically comprises five parallel joins, current sensor is connected with sample circuit with filtering circuit by amplification in the described branch road, described sample circuit and GPRS module MG323, described GPRS module MG323 is connected with wireless antenna.
To sum up, the on-line monitoring of cable device based on the wireless transmission of MG323 that the utility model provides can effectively shorten monitoring periods, reduces the test job amount.
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Based on the structure of the on-line monitoring of cable device of the wireless transmission of MG323 as shown in Figure 1.In the accompanying drawing 1,2,3,4,5---current sensor, 6---amplifying and filtering circuit 7---sample circuit, 7---single-chip microcomputer, 8---GPRS module MG323,10---wireless antenna.
1. adopt current sensor 1,2,3 to extract the grounding circulation of A, B, C three-phase; Current sensor 4 extracts total Leakage Current; Current sensor 5 extracts a phase running current.2. amplify and filtering by amplifying with 6 pairs of measured signals of filtering circuit.3. will amplify by sample circuit 7 and filtering after simulating signal convert the digital signal that computing machine can identify to and give single-chip microcomputer 8.4. single-chip microcomputer 8 is delivered to GPRS module 9 with digital signal through being assembled into fixing message format after the operand word arithmetic.5. GPRS module 9 is exported data.
Feature of the present utility model specifically comprises: (1) adopts HUAWEI MG323GSM M2M module to carry out Wireless Data Transmission.
(2) adopt the collection of single chip circuit composition data, data take LM3S5956-IQR as core to calculate, realize on-line monitoring of cable.
For the input control signal interface section, the MG323 module mainly realizes machine open/close control and hardware reset function.
The TERM_ON pin is used for realizing the machine open/close function.When the TERM_ON pin drag down 〉=1s after, can start shooting; After the start, if again the TERM_ON pin is dragged down 〉=1s, can shut down.
The RESET pin is used for realizing that module hardware resets.When the situation of software deadlock appearred in module, after dragging down RESET pin 〉=10ms, module was carried out hardware reset.
Output control signal interface
The MG323 module provides network state indication interface LED_STATUS, controls led state pilot lamp on the User Exploitation plate, the state that display network connects by the pulse signal of this interface output.In actual applications, the LED_STATUS pin is the driving LED status indicator lamp directly, and driving circuit as shown in Figure 3.
The UART interface is recommended circuit, and MG323 module (DCE) UART1 interface is connected as shown in Figure 4 with main frame (DTE's).
Above on-line monitoring of cable device to the wireless transmission based on MG323 provided by the utility model is described in detail, used specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.