CN101788799B - 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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- CN101788799B CN101788799B CN2009100445822A CN200910044582A CN101788799B CN 101788799 B CN101788799 B CN 101788799B CN 2009100445822 A CN2009100445822 A CN 2009100445822A CN 200910044582 A CN200910044582 A CN 200910044582A CN 101788799 B CN101788799 B CN 101788799B
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Abstract
一种用于远程监控系统的现场信号采集方法，该方法为下述步骤：1、增设继电器和双路直流信号隔离器。2、接收现场信号。3、无损分离信号。4、输出信号。该方法采用增设的电器将现场采集的信号无损分流，使该信号既可继续用于现场监控，又可传送到远方监控中心进行实时监测，于是可在节省投资的情况下有效防止远程监控系统采集虚假信号。具有如下有益效果：(1)能保证信号的真实性，确保远程监控。(2)与当地控制系统共享电缆，投资少。(3)适用于各种规模的远程监控系统，不受其它因素制约。
A field signal acquisition method for a remote monitoring system, the method comprises the following steps: 1. Adding a relay and a double-channel DC signal isolator. 2. Receive live signals. 3. Lossless separation of signals. 4. Output signal. In this method, additional electrical appliances are used to shunt the signal collected on site without loss, so that the signal can be used for on-site monitoring, and can be transmitted to the remote monitoring center for real-time monitoring, thus effectively preventing the remote monitoring system from collecting false signal. The invention has the following beneficial effects: (1) It can ensure the authenticity of signals and ensure remote monitoring. (2) Share cables with local control system, less investment. (3) It is suitable for remote monitoring systems of various scales and is not restricted by 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.
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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 CN101788799A (en) | 2010-07-28 |
| CN101788799B true CN101788799B (en) | 2011-12-07 |
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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 |
Citations (2)
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| CN1694025A (en) * | 2005-04-28 | 2005-11-09 | 南京科远控制工程有限公司 | Automatic control system based on artificial intelligence for heat-engine plant |
| CN101157006A (en) * | 2007-07-27 | 2008-04-09 | 江苏方天电力技术有限公司 | Coal-fired unit flue gas desulfurization real-time monitoring and information management system |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1694025A (en) * | 2005-04-28 | 2005-11-09 | 南京科远控制工程有限公司 | Automatic control system based on artificial intelligence for heat-engine plant |
| CN101157006A (en) * | 2007-07-27 | 2008-04-09 | 江苏方天电力技术有限公司 | Coal-fired unit flue gas desulfurization real-time monitoring and information management system |
Non-Patent Citations (2)
| Title |
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| 刘武林.火电厂烟气脱硫系统热工控制技术探讨.《湖南电力》.2004,第24卷(第5期), * |
| 熊亚明.利用负荷管理系统完善电能量实时采集与监控系统.《甘肃水利水电技术》.2007,第43卷(第3期), * |
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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 |