CN101788799A - Field signal acquisition method used for remote monitoring system - Google Patents
Field signal acquisition method used for remote monitoring system Download PDFInfo
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- CN101788799A CN101788799A CN200910044582A CN200910044582A CN101788799A CN 101788799 A CN101788799 A CN 101788799A CN 200910044582 A CN200910044582 A CN 200910044582A CN 200910044582 A CN200910044582 A CN 200910044582A CN 101788799 A CN101788799 A CN 101788799A
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Abstract
The invention relates to a field signal acquisition method used for a remote monitoring system, which comprises the following steps of 1, additionally installing a relay and a double-path DC signal isolator; 2, receiving a field signal; 3, separating the signal in good condition; 4, outputting the signal. In the method, the electrical appliance additionally installed is adopted for shunting the signal acquired on site in good condition, so that the signal can not only be used for field monitoring, but also be transmitted to a remote monitoring center for real-time monitoring, thereby effectively preventing the remote monitoring system from acquiring a spurious signal under the condition of saving investment. The invention has the following benefits that: (1) the method can ensure the authenticity of the signal and the remote monitoring; (2) the method can share a cable with the local control system, therefore, the investment is small; (3) the method can be applicable to the remote monitoring systems in various scales without the constraint of other factors.
Description
Technical field
The invention belongs to the control engineering technical field, be specifically related to a kind of field signal acquisition method that is used for long distance control system.
Background technology
Along with mechanics of communication and development of computer, long distance control system has all been developed in a lot of fields, the ruuning situation at a distance of the equipment of hundreds if not thousands of kilometers on the region is transferred to the remote monitoring center, with convenient supervision.If but this supervision has a negative impact to the manager of equipment, the phenomenon that signal is played tricks then appears probably, and for example environmental administration is so often just to the long distance control system of heat-engine plant desulfurizer ruuning situation.And the field signal acquisition mode overwhelming majority in the past is the control system by the scene, passes on out as DCS system (scattered control system) and SIS system (plant level supervisory information system).Though this technology implementation is got up simply, but owing to can handle arbitrarily signal easily in the control system at the scene, so the signal that such long distance control system collects often is false, thereby cause long distance control system to lose the meaning of monitoring.In order to prevent the generation of spurious signal, someone installs a cover signal measurement element at the scene separately, lay special cable and deliver to long distance control system, but that this mode is invested is excessive, and some scene can't install another set of measuring sensor, so can't large-scale promotion application.
Summary of the invention
The technical problem to be solved in the present invention is, the defective at known technology exists provides a kind of field signal acquisition method that is used for long distance control system, and this method can not only be guaranteed the authenticity of data-signal, and small investment, instant effect.
Technical solution of the present invention is that a kind of field signal acquisition method that is used for long distance control system that is provided is to be following step:
1, sets up relay and two-way direct current signal isolator.In existing field control system, set up a relay and a two-way direct current signal isolator.The input end of wherein said relay is inserted by shielded cable by on-the-spot switch on and off signal collecting element, and two output terminals of relay insert the switch on and off signal input part of field control system and long distance control system respectively by shielded cable; The input end of described two-way direct current signal isolator is inserted by shielded cable by on-the-spot 4～20mA standard signal acquisition elements, and two output terminals of two-way direct current signal isolator insert 4～20mA standard signal input end of field control system and long distance control system respectively by shielded cable.
2, receive on-site signal.By shielded cable on-the-spot switch on and off signal is received and import above-mentioned relay, by shielded cable scene 4～20mA standard signal is received and import above-mentioned two-way direct current signal isolator simultaneously.
3, harmless separation signal.The relay of setting up by above-mentioned steps 1 is divided into two the on-the-spot switch on and off signal lossless ground of step 2 input, and the two-way direct current signal isolator of setting up by above-mentioned steps 1 scene 4～20mA standard signal that step 2 is imported also nondestructively is divided into two simultaneously.
4, output signal.With the on-the-spot switch on and off signal after separating by relay is harmless in the step 3, the one tunnel is sent to field control system by shielded cable, and one the tunnel is sent to long distance control system; Simultaneously by shielded cable with the scene 4～20mA standard signal after separating by two-way direct current signal isolator is harmless in the step 3, the one tunnel is sent to field control system, the one tunnel is sent to long distance control system.
Workflow of the present invention can be referring to shown in the accompanying drawing 1.
Technological core of the present invention be adopt the relay set up and two-way direct current signal isolator with collection in worksite to standard signal can't harm shunting, make this signal both can continue on for on-the-spot monitoring and operation, can be sent to the remote monitoring center by communication apparatus again and monitor in real time, gather spurious signal so can under the situation of reducing investment outlay, effectively prevent long distance control system.
The invention has the beneficial effects as follows:
(1), what can guarantee that various long distance control system collected is from the signal of signal element on the spot, therefore can guarantee the authenticity of signal, the purpose of guaranteeing to carry out remote monitoring.
(2), share cable, small investment with local control system.
(3), be applicable to and the long distance control system of various scales be not subjected to the restriction of any other factors.
Description of drawings
Fig. 1 is a workflow reference diagram of the present invention.
Embodiment
Embodiment 1.
1, sets up relay and two-way direct current signal isolator.In existing field control system, set up a relay and a two-way direct current signal isolator.The SWP9034 type two-way direct current signal isolator that the DC48V type relay that wherein said relay adopts commercially available Omron (China) company limited to produce, described two-way direct current signal isolator adopt commercially available Yunnan Yun Run instrument Manufacturing Co., Ltd to produce.The input end of wherein said relay is inserted by shielded cable by on-the-spot switch on and off signal collecting element, and two output terminals of relay insert the switch on and off signal input part of field control system and long distance control system respectively by shielded cable; The input end of described two-way direct current signal isolator is inserted by shielded cable by on-the-spot 4～20mA standard signal acquisition elements, and two output terminals of two-way direct current signal isolator insert 4～20mA standard signal input end of field control system and long distance control system respectively by shielded cable.
2, receive on-site signal.By commercially available shielded cable on-the-spot switch on and off signal is received and import above-mentioned relay, also scene 4～20mA standard signal is received and import above-mentioned two-way direct current signal isolator simultaneously by commercially available shielded cable.
3, harmless separation signal.The relay of setting up by above-mentioned steps 1 is divided into two the on-the-spot switch on and off signal lossless ground of step 2 input, and the two-way direct current signal isolator of setting up by above-mentioned steps 1 scene 4～20mA standard signal that step 2 is imported also nondestructively is divided into two simultaneously.
4, output signal.With the on-the-spot switch on and off signal after separating by relay is harmless in the step 3, the one tunnel is sent to field control system by commercially available shielded cable, and one the tunnel is sent to long distance control system; Simultaneously also by commercially available shielded cable with in the step 3 by the scene 4～20mA standard signal after the harmless separation of two-way direct current signal isolator, the one tunnel is sent to field control system, the one tunnel is sent to long distance control system.
Claims (1)
1. field signal acquisition method that is used for long distance control system, this method is following step:
(1), sets up relay and two-way direct current signal isolator, in existing field control system, set up a relay and a two-way direct current signal isolator, the input end of wherein said relay is inserted by shielded cable by on-the-spot switch on and off signal collecting element, and two output terminals of relay insert the switch on and off signal input part of field control system and long distance control system respectively by shielded cable; The input end of described two-way direct current signal isolator is inserted by shielded cable by on-the-spot 4～20mA standard signal acquisition elements, and two output terminals of two-way direct current signal isolator insert 4～20mA standard signal input end of field control system and long distance control system respectively by shielded cable;
(2), receive on-site signal, by shielded cable on-the-spot switch on and off signal is received and imports above-mentioned relay, simultaneously by shielded cable with the reception of scene 4～20mA standard signal and import above-mentioned two-way direct current signal isolator;
(3), harmless separation signal, the relay of setting up by above-mentioned steps 1 is divided into two the on-the-spot switch on and off signal lossless ground of step 2 input, and the two-way direct current signal isolator of setting up by above-mentioned steps 1 scene 4～20mA standard signal that step 2 is imported also nondestructively is divided into two simultaneously;
(4), output signal, with the on-the-spot switch on and off signal after separating by relay is harmless in the step 3, the one tunnel is sent to field control system by shielded cable, the one tunnel is sent to long distance control system; Simultaneously by shielded cable with the scene 4～20mA standard signal after separating by two-way direct current signal isolator is harmless in the step 3, the one tunnel is sent to field control system, the one tunnel is sent to long distance control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2009100445822A CN101788799B (en) | 2009-10-21 | 2009-10-21 | Field signal acquisition method used for remote monitoring system |
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| CN2009100445822A CN101788799B (en) | 2009-10-21 | 2009-10-21 | Field signal acquisition method used for remote monitoring system |
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| CN101788799A true CN101788799A (en) | 2010-07-28 |
| CN101788799B CN101788799B (en) | 2011-12-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115195069A (en) * | 2022-06-27 | 2022-10-18 | 佛山市南海区广工大数控装备协同创新研究院 | Universal data acquisition module and system for injection molding machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100368949C (en) * | 2005-04-28 | 2008-02-13 | 南京科远控制工程有限公司 | Automatic control system based on artificial intelligence for heat-engine plant |
| CN101157006B (en) * | 2007-07-27 | 2010-04-21 | 江苏方天电力技术有限公司 | Real time monitoring and information management system of coal-firing units gas desulfurization |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115195069A (en) * | 2022-06-27 | 2022-10-18 | 佛山市南海区广工大数控装备协同创新研究院 | Universal data acquisition module and system for injection molding machine |
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Owner name: THE RESEARCH ACADEMY OF HU'NAN ELECTRIC POWER COMP Free format text: FORMER OWNER: EXPERIMENT RESEARCH ACADEMY OF HU'NAN ELECTRIC POWER COMPANY Effective date: 20121206 Owner name: HU'NAN HUICUI ELECTRIC POWER TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: HU'NAN HUICUI ELECTRIC POWER TECHNOLOGY CO., LTD. Effective date: 20121206 |
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Effective date of registration: 20121206 Address after: 410007 No. 79 hydroelectric power street, east pond, Hunan, Changsha Patentee after: Science Research Institute of Hunan Electric Power Co., Ltd. Patentee after: Hunan Focus Environmental Protection Technology Co.,Ltd. Patentee after: State Grid Corporation of China Address before: 410007 No. 79 hydroelectric power street, east pond, Hunan, Changsha Patentee before: Hunan Institute of Power Company Experiment Patentee before: Hunan Focus Environmental Protection Technology Co.,Ltd. |
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Effective date of registration: 20180810 Address after: 410004 398 new Shao Dong Road, Tianxin District, Changsha, Hunan Co-patentee after: Power Science Research Institute of Hunan Electric Power Co., Ltd. Patentee after: State Grid Hunan Electric Power Co., Ltd. Co-patentee after: State Grid Corporation of China Address before: No. 79, Dongtang hydropower street, Changsha, Hunan Province Co-patentee before: Hunan Focus Environmental Protection Technology Co.,Ltd. Patentee before: Science Research Institute of Hunan Electric Power Co., Ltd. Co-patentee before: State Grid Corporation of China |
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