A safety AND gate circuit using an oscillator in a two-out-two circuit and its control method
A technology of oscillator and gate circuit, applied in the field of safety and gate circuit and its control, can solve the problems of poor reliability, many equipment and high cost, and achieve the effect of high safety, saving space, and improving safety and reliability.
Active Publication Date: 2017-08-25
HEFEI GOCOM INFORMATION &TECH CO LTD
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Problems solved by technology
This method can solve the problem of security, but the disadvantage is that more equipment is used and the cost is higher
The other type is to use a safety circuit. The outputs of two CPUs pass through a safety AND gate to control a relay. This method only uses one relay, which can effectively reduce the cost, but the reliability is poor.
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[0019] The present invention will be further described below in conjunction with the accompanying drawings.
[0020] like Figure 1 ~ Figure 3 As shown, the safe AND gate circuit of an oscillator is used in the two-out-of-two circuit of this embodiment, including an isolated boost conversion circuit one 1, an isolated boost conversion circuit two 2, an oscillator 3, a safety relay 5, an isolated Type boost conversion circuit 4, isolated feedback circuit 6; the input end of isolated boost conversion circuit one 1 is connected with the output end of CPU1, the input end of isolated boost conversion circuit two 2 is connected with the output end of CPU2, The output terminals of the isolated boost converter circuit 1 and the isolated boost converter circuit 2 are connected to the input terminal of the isolated boost converter circuit 4 through the oscillator 3, and the output terminals of the isolated boost converter circuit 4 are connected to the The input end of the safety relay...
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A safety AND gate circuit using an oscillator in a two-out-two circuit according to the present invention and its control method include an isolated boost conversion circuit 1, an isolated boost conversion circuit 2, an oscillator, a safety relay, an isolated boost transducer circuit, an isolated feedback circuit; the input end of the isolated boost conversion circuit one is connected to the output end of CPU1, the input end of the isolated boost conversion circuit two is connected to the output end of CPU2, and the The output terminals of the isolated boost conversion circuit 1 and the isolated boost conversion circuit 2 are connected to the input terminal of the isolated boost conversion circuit through an oscillator, and the output terminal of the isolated boost conversion circuit is connected to the input of the safety relay The input end of the isolated feedback circuit is connected to the output end of the isolated boost transducing circuit, and the output end is connected to the input end of the isolated boost transducing circuit. The invention can better solve the problems of circuit safety and reliability.
Description
technical field [0001] The invention relates to the technical field of railway signals, in particular to a safety AND gate circuit using an oscillator in a two-out-two circuit and a control method thereof. Background technique [0002] The safety AND gate circuits currently used in the field of railway signals are usually divided into two categories. One is to use two safety circuits, each CPU controls a safety circuit, each safety circuit controls a relay, and the logic is realized by connecting two relays in series. "AND" function. This method can solve the problem of safety, but the disadvantage is that more equipment is used and the cost is higher. The other type is to use a safety circuit. The outputs of two CPUs pass through a safety AND gate to control a relay. This method only uses one relay, which can effectively reduce the cost, but the reliability is poor. Contents of the invention [0003] The technical problem to be solved by the present invention is to prov...
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IPC IPC(8): H03K19/003H03K19/007H02M7/217
Inventor 魏臻胡庆新庞师锋夏寒冰吴兴岗诸葛战斌
Owner HEFEI GOCOM INFORMATION &TECH CO LTD