CN110007590B - Connection switching circuit of measurement and control system, measured target and simulator - Google Patents
Connection switching circuit of measurement and control system, measured target and simulator Download PDFInfo
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- CN110007590B CN110007590B CN201910303182.2A CN201910303182A CN110007590B CN 110007590 B CN110007590 B CN 110007590B CN 201910303182 A CN201910303182 A CN 201910303182A CN 110007590 B CN110007590 B CN 110007590B
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- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B7/00—Arrangements for obtaining smooth engagement or disengagement of automatic control
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Abstract
The invention provides a connection switching circuit of a measurement and control system, a measured target and a simulator, which comprises: the invention relates to a state transfer switch, two transfer relays and a relay group consisting of a plurality of transfer relays connected in parallel.
Description
Technical Field
The invention relates to a universal target/simulator conversion device, in particular to a connection switching circuit, a device and a method of a measurement and control system, a measured target and a simulator.
Background
The target simulator is used as an important component of a computer measurement and control system and is mainly responsible for replacing a controlled target access system and completing self-checking test, regular maintenance, fault positioning or simulation training and the like of the system in a matching manner.
At present, when a common computer measurement and control system connection object performs state conversion between a target and a simulator, an operator needs to manually complete the plugging conversion work of a system control cable on the measured target and the simulator. The operation often has the problems of time consumption, labor consumption and the like, and particularly, the problem of control channel conversion between the target and the simulator is particularly obvious for a system which has a complex electrical interface, a large number of signals and frequent test state conversion requirements.
Disclosure of Invention
The invention provides a connection switching circuit, a device and a method of a measurement and control system, a measured object and a simulator, which aim to solve the problem that when the state of a connection object of the computer measurement and control system is switched between the object and the simulator, an operator needs to manually complete the plug-in switching work of a system control cable on the measured object and the simulator.
In some embodiments, a connection switching circuit for a measurement and control system, a target to be measured, and a simulator includes: the relay group comprises a state transfer switch, two transfer relays and a plurality of conversion relays connected in parallel;
each switching relay comprises an on-off switch, the two switching relays are connected between the state switching switch and the connecting node in parallel, and can be selected to be communicated with an external power supply through the state switching switch so as to control the corresponding on-off switch to be closed;
the on-off switch of one switching relay is closed to enable the relay group to be communicated with the connecting node;
each conversion relay comprises a single-pole double-throw switch, two fixed contacts of each single-pole double-throw switch are respectively connected with the simulator and the target to be tested, and a movable contact is connected with the computer measurement and control system.
In some embodiments, the circuit further comprises:
a first status display lamp connected in parallel with one of the two switching relays; and/or a second status display lamp connected in parallel with the other of the two switching relays.
In some embodiments, the circuit further comprises a fault detection module connected to the connection node for detecting whether an open circuit fault has occurred in the switching circuit.
In some embodiments, each of the transfer relays further includes an on-off switch, and when the transfer relay is powered on, the on-off switch of the transfer relay is opened, and the movable contact of the single-pole double-throw switch is connected to one of the stationary contacts of the switch, and the fault detection module includes:
a fault detection relay, a fault lamp, an on-off switch of another switching relay, and an on-off switch of each switching relay; the fault detection relay comprises an on-off switch;
the fault lamp is connected with the fault detection relay in parallel and is connected with the on-off switch of the fault detection relay in series;
the on-off switch of each conversion relay is connected in series and is connected between a connection node and the fault relay;
the on-off switch of the other switching relay is connected in parallel with the on-off switch of each switching relay which is connected in series.
In certain embodiments, the on-off switch is a single pole, single throw switch.
In some embodiments, the switching circuit further comprises:
and the power switch is used for controlling the communication of the circuit and an external power supply.
In some embodiments, a device for switching connection between a measurement and control system and a measured object and a simulator comprises the switching circuit.
In some embodiments, a method of utilizing a switching circuit as described above, comprises:
controlling the state change-over switch to be switched to a first state so that the on-off switch of one of the switching relays is closed due to the electrification of the corresponding switching relay, and further connecting the movable contact and one of the stationary contacts of the single-pole double-throw switch of the relay group;
and controlling the state change-over switch to be switched to a second state so as to close the on-off switch of the other switching relay due to the electrification of the corresponding switching relay, and further connecting the movable contact and the other fixed contact of the single-pole double-throw switch of the relay group.
The invention has the following beneficial effects:
the invention provides a connection switching circuit, a device and a method for a measurement and control system, a measured object and a simulator, which realize the rapid conversion of the states of the object and the simulator in the operation and use process of a computer test system by utilizing the switching of normally open and normally closed ends of a single-pole double-throw contact of a relay, solve the problem that the computer test system performs the state conversion of the system object and the simulator by inserting the measured object and the simulator through a manual operation control cable, and improve the usability of the system.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Fig. 1 shows a schematic structural diagram of a connection switching circuit of a measurement and control system, a measured object and a simulator in an embodiment of the invention.
Fig. 2 shows a schematic diagram of connection switching between the measurement and control system, the target to be measured and the simulator in the embodiment of the invention.
Fig. 3 shows a schematic flow chart of a connection switching method between the measurement and control system, the measured object and the simulator in the embodiment of the invention.
Detailed Description
In order to more clearly illustrate the invention, the invention is further described below with reference to preferred embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is intended to be illustrative and not restrictive, and is not intended to limit the scope of the invention.
Various cross-sectional views in accordance with the disclosed embodiment of the invention are shown in the drawings. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers, and relative sizes and positional relationships therebetween shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
At present, when a common computer measurement and control system connection object performs state conversion between a target and a simulator, an operator needs to manually complete the plugging conversion work of a system control cable on the measured target and the simulator. The operation usually has the problems of time consumption, labor consumption and the like, and particularly, the problem of control channel conversion between the target and the simulator is particularly obvious for a system which has a complex electrical interface, a large number of signals and frequent test state conversion requirements.
The invention provides a connection switching circuit, a device and a method of a measurement and control system, a measured object and a simulator, which aim to solve the problem that when the state of a connection object of the computer measurement and control system is switched between the object and the simulator, an operator needs to manually complete the plug-in switching work of a system control cable on the measured object and the simulator.
The present invention will be described in detail with reference to fig. 1 to 3.
The first aspect of the present invention provides a circuit for switching connection between a measurement and control system, a target to be measured, and a simulator, and specifically includes: the system comprises a state switch S2, two switching relays (K1 and K2) and a relay group consisting of a plurality of switching relays (K4 to Kn) connected in parallel.
As shown in fig. 1, each of the switching relays (K1 and K2) includes an on-off switch (an on-off switch K1_1 of K1, an on-off switch K2_1 of K2), and the two switching relays (K1 and K2) are connected in parallel between the state switching switch S2 and the connection node P, and can be selectively connected to an external power source (for example, a +28V power source in the figure) through a state switching switch S2, so as to control the on-off switches (an on-off switch K1_1 of K1, and an on-off switch K2_1 of K2) to be closed; the on-off switch K2_1 of one switching relay K2 is closed to enable the relay group to be communicated with the external power supply; each transfer relay (K4-Kn) comprises a single-pole double-throw switch (K4_ 2-Kn _2), two fixed contacts of each single-pole double-throw switch (K4_ 2-Kn _2) are respectively connected with the simulator and the tested object, and a movable contact is connected with the computer measurement and control system.
Further, in order to enable the switching circuit to have a fault indication function, a fault detection module connected to the connection node P may be provided, and configured to detect whether an open-circuit fault occurs in the switching circuit.
Specifically, each of the transfer relays (K4 to Kn) further includes an on-off switch (K4_1 to Kn _1), when the transfer relays (K4 to Kn) are energized, the on-off switches K4_1 to Kn _1 of the transfer relays (K4 to Kn) are closed, the movable contacts of the single-pole double-throw switches (K4_2 to Kn _2) are connected with one of the stationary contacts of the switch, and the fault detection module includes: a fault detection relay K3, a fault lamp L4, an on-off switch K1_1 of another switching relay K1, and on-off switches (K4_1 to Kn _1) of each of the transfer relays (K4 to Kn); the fault detection relay comprises an on-off switch (K3_ 1); the fault lamp L4 is connected with the fault detection relay K3 in parallel and is connected with an on-off switch K3_1 of the fault detection relay K3 in series; on-off switches (K4_1 to Kn _1) of each of the transfer relays (K4 to Kn) are connected in series with each other and between a connection node P and the failure relay K3; the on-off switch K1_1 of the other switching relay K1 is provided in parallel with the on-off switches (K4_1 to Kn _1) of each of the transfer relays (K4 to Kn) connected in series with each other.
In the invention, K1_1, K2_1, K3_1, K4_1, K5_1, K6_1 and … (and so on), Kn _1 is on-off switches of relays K1, K2, K3, K4, K5, K6 and … (and so on) and Kn, K4_2, K5_2, K6_2 and … (and so on), Kn _2 is single-pole double-throw switches of relays K4, K5, K6 and … (and so on) and Kn. When the relay set is not electrified, the initial state of K4_1, K5_1, K6_1 and … (and so on) and the initial state of Kn _1 are closed states, K4_2, K5_2, K6_2 and … (and so on) and Kn _2 are switched to the states in the figure 2, namely the simulator is connected with the measurement and control system; when the relay set is electrified, K4_1, K5_1, K6_1, … (and the like) and Kn _1 are switched to an open state, and K4_2, K5_2, K6_2, … (and the like) and Kn _2 are switched to a measured object to be connected with the measurement and control system. When the current is not applied to K1 or K2, the corresponding K1_1 and K2_1 are in an open state, and when the current is applied to K1 or K2, the corresponding K1_1 and K2_1 are in a closed state. Because the relay group is controlled to be electrified or not through the K2_1, the communication between the simulator and the measurement and control system and the communication between the simulator and the measurement and control system can be realized through the combination of the K2_1 and the relay group.
In some embodiments, a power indicator light L1 may be provided to indicate whether the circuit is powered.
Further, the circuit further comprises: a first status display lamp (L2) connected in parallel with one of the two switching relays (K1); and/or a second status display lamp (L3) connected in parallel with the other of the two switching relays (K2).
Therefore, the current switching state can be displayed through the two mode display lamps, namely, the measured target is communicated with the measurement and control system, or the simulator is communicated with the measurement and control system.
Of course, three gears may be provided on the state switch, and in the embodiment in the application, the first state may be defined as a state where the target to be measured communicates with the measurement and control system, that is, the K1 relay is turned on, and the second state may be defined as a state where the simulator communicates with the measurement and control system, that is, the K2 relay is connected to the conductor. The three gears are therefore: when the state switch is in the neutral position, that is, the whole circuit is not connected to the external power supply, and then all the relays recover the initial state, the initial states of all the relays in the embodiment of the present application, that is, K1_1 of K1 is opened, K2_1 of K2 is opened, K3_1 of K3 is closed, K4_1 to Kn _1 of K4-Kn are opened, and K4_2 to Kn _2 of K4-Kn are switched to the state shown in fig. 2.
In some embodiments, the switching circuit further comprises: and a power switch S1 for controlling the communication of the circuit with an external power source.
In some embodiments, the on-off switch is a single pole single throw switch.
The operation of the switching circuit in the above embodiment will be described in detail.
1) In the initial state, the power switch S1 is pressed, the power indicator lamp L1 is on, and the fault indicator lamp L4 is on; 2) turning a state switch S2, if the state switch S2 is set in a simulator gear, controlling the relay K1 and the relay K3 to act, continuously lighting a power indicator lamp L1, lighting a simulator state indicator lamp L2, turning off a fault indicator lamp L4, and switching a computer measurement and control system measurement and control port comprising a channel 1, a channel 2 and a channel 3 to a … channel n-3 into a simulator state; 3) rotating a state switch S2, if the state switch is set in a target gear, controlling relays K2 and K3, switching relays K4, K5, K6 and Kn to act, continuously lighting a power indicator lamp L1, lighting a target state indicator lamp L3, turning off a fault indicator lamp L4, and switching a computer measurement and control system measurement and control port comprising a channel 1, a channel 2, a channel 3 and a channel n-3 of … to a target state; 4) after the task is finished, the state switch S2 is rotated and placed in a neutral gear, all relays recover to the initial state, the power indicator lamp L1 is continuously turned on, and the fault indicator lamp L4 is turned on; 5) the power switch S1 is turned off and all indicator lights go off.
Obviously, through the detailed description of the above embodiments, it can be known that the switching circuit provided in the first aspect of the present invention utilizes the switching of the normally open and normally closed ends of the single-pole double-throw contact of the relay to realize the fast conversion between the target and the state of the simulator during the operation and use of the computer test system, solve the problem that the computer test system performs the conversion between the system target and the state of the simulator by plugging the tested target and the simulator through the manual operation control cable, and improve the usability of the system.
Furthermore, the second aspect of the present invention provides a switching device for connecting a measurement and control system with a target to be measured and a simulator, the device includes the switching circuit mentioned in the foregoing embodiment, and for the same reason as the foregoing embodiment, the switching device provided in the second aspect of the present invention utilizes the switching of the normally open and normally closed ends of the single-pole double-throw contacts of the relay to realize the rapid switching between the states of the target and the simulator during the operation and use of the computer test system, thereby solving the problem that the computer test system performs the switching between the states of the system target and the simulator by plugging the target to be measured and the simulator through the manual operation control cable, and improving the usability of the system.
Further, a third aspect of the present invention provides a method for performing switching by using the above switching circuit, specifically, as shown in fig. 3, the method includes:
and S1, controlling the state change-over switches to be switched to a first state, so that the on-off switch of one of the change-over relays is closed because the corresponding change-over relay is electrified, and further, the movable contact of the single-pole double-throw switch of the relay group is connected with one of the stationary contacts.
And S2, controlling the state change-over switch to be switched to a second state, so that the on-off switch of the other change-over relay is closed because the corresponding change-over relay is electrified, and further connecting the movable contact of the single-pole double-throw switch of the relay group with the other stationary contact.
The first state and the second state mentioned in this aspect can be known according to the foregoing embodiments, and are not described herein.
Based on the same reason as the foregoing embodiment, the switching method provided in the third aspect of the present invention utilizes the switching of the normally open and normally closed ends of the single-pole double-throw contact of the relay to achieve the rapid conversion between the target and the simulator state during the operation and use of the computer test system, thereby solving the problem of performing the conversion between the system target and the simulator state by the computer test system through the manual operation of the control cable to plug the tested target and the simulator, and improving the usability of the system.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations and modifications can be made on the basis of the above description, and all embodiments cannot be exhaustive, and obvious variations and modifications of the present invention are included in the protection scope of the present invention.
Claims (6)
1. A measurement and control system and a connection switching circuit of a measured object and a simulator are characterized by comprising: the relay group comprises a state switch, two switching relays and a plurality of switching relays connected in parallel;
each switching relay comprises an on-off switch, the two switching relays are connected between the state switching switch and the connecting node in parallel, and can be communicated with an external power supply by selecting one of the state switching switches to control the corresponding on-off switch to be closed;
the on-off switch of one of the switching relays is closed to enable the relay group to be communicated with the connecting node;
each conversion relay comprises a single-pole double-throw switch, two fixed contacts of each single-pole double-throw switch are respectively connected with the simulator and the object to be tested, and a moving contact is connected with a computer measurement and control system;
the circuit also comprises a fault detection module connected with the connecting node and used for detecting whether the switching circuit has an open circuit fault;
each conversion relay also comprises an on-off switch, when the conversion relay is electrified, the on-off switch of the conversion relay is opened, the movable contact of the single-pole double-throw switch is connected with one of the stationary contacts of the switch, and the fault detection module comprises:
a fault detection relay, a fault lamp, an on-off switch of another switching relay, and an on-off switch of each switching relay; the fault detection relay comprises an on-off switch;
the fault lamp is connected with the fault detection relay in parallel and is connected with the on-off switch of the fault detection relay in series;
the on-off switch of each conversion relay is connected in series and is connected between a connection node and the fault detection relay;
the on-off switch of the other switching relay is connected in parallel with the on-off switch of each switching relay which is connected in series.
2. The switching circuit of claim 1, wherein the circuit further comprises:
a first status display lamp connected in parallel with one of the two switching relays; and/or a second status display lamp connected in parallel with the other of the two switching relays.
3. The switching circuit of claim 1, wherein the on-off switch is a single pole, single throw switch.
4. The switching circuit of claim 1, further comprising:
and the power switch is used for controlling the communication of the circuit and an external power supply.
5. A device for switching the connection of a measurement and control system to a target to be measured and a simulator, comprising a switching circuit according to any one of claims 1 to 4.
6. A method of using the switching circuit of any of claims 1-4, comprising:
controlling the state change-over switch to be switched to a first state so that the on-off switch of one switching relay is closed due to the electrification of the corresponding switching relay, and further connecting the movable contact of the single-pole double-throw switch of the relay group with one of the stationary contacts;
and controlling the state change-over switch to be switched to a second state so as to close the on-off switch of the other switching relay due to the electrification of the corresponding switching relay, and further connecting the movable contact and the other fixed contact of the single-pole double-throw switch of the relay group.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910303182.2A CN110007590B (en) | 2019-04-16 | 2019-04-16 | Connection switching circuit of measurement and control system, measured target and simulator |
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| CN201910303182.2A CN110007590B (en) | 2019-04-16 | 2019-04-16 | Connection switching circuit of measurement and control system, measured target and simulator |
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| CN110007590B true CN110007590B (en) | 2022-09-23 |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003123568A (en) * | 2001-10-17 | 2003-04-25 | Nec Corp | Signal switching device and signal switching method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10203682C2 (en) * | 2002-01-24 | 2003-11-27 | Siemens Ag | Electrical switching arrangement with an electromagnetic relay and a switching device arranged parallel to a contact of the electromagnetic relay |
| US8482885B2 (en) * | 2009-09-14 | 2013-07-09 | Electronic Systems Protection, Inc. | Hybrid switch circuit |
| CN102508485B (en) * | 2011-11-08 | 2014-11-12 | 中国航空工业集团公司航空动力控制系统研究所 | Signal detection and fault simulation device for semi-physical simulation test |
| CN103016325B (en) * | 2012-12-07 | 2015-10-21 | 江苏永钢集团有限公司 | A kind of raw water service pump control gear |
| CN103683484A (en) * | 2013-12-31 | 2014-03-26 | 大唐贵州发耳发电有限公司 | Circuit switching device |
| CN104298125B (en) * | 2014-08-27 | 2017-09-15 | 北京华力创通科技股份有限公司 | Modularization CPCI distributing cabinets |
| CN104317243A (en) * | 2014-11-13 | 2015-01-28 | 江苏大唐国际吕四港发电有限责任公司 | Scraper slag conveyor protection circuit |
| CN106026782A (en) * | 2016-06-25 | 2016-10-12 | 黄志强 | Control line for soft starting of double-speed motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003123568A (en) * | 2001-10-17 | 2003-04-25 | Nec Corp | Signal switching device and signal switching method |
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