CN2355387Y - Electric network alarming and controlling device - Google Patents
Electric network alarming and controlling device Download PDFInfo
- Publication number
- CN2355387Y CN2355387Y CN 98222914 CN98222914U CN2355387Y CN 2355387 Y CN2355387 Y CN 2355387Y CN 98222914 CN98222914 CN 98222914 CN 98222914 U CN98222914 U CN 98222914U CN 2355387 Y CN2355387 Y CN 2355387Y
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- circuit
- resistance
- relay
- central control
- latch
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Abstract
The utility model relates to an electric network alarming and controlling device which is used for monitoring and defending a special warning region and comprises a central control circuit, a data acquisition circuit, a display circuit, an electric network power supply circuit and a control circuit, wherein the central control circuit is composed of CPU, a flip-latch and a decoder; the data acquisition circuit, the display circuit, the electric network power supply circuit and the control circuit are connected with the central control circuit. The electric network power supply circuit comprises a resistance changing circuit which is connected with a power cord in series, the output terminal of the resistance changing circuit is connected with the low-pressure terminal of a voltage mutual inductor, and the control terminal of the resistance changing circuit is connected with the control terminal of a power supply circuit of the central control circuit. The data acquisition circuit is connected with the low-pressure terminal of the voltage mutual inductor and comprises a voltage changing circuit and a filter circuit, and the output terminal of the data acquisition circuit is connected with the central control circuit by an A/D converting circuit. The utility model has the characteristics of low cost, simple construction and decreased rate of false alarm.
Description
The utility model is a kind of grid alarm control device that relates to special warning region monitoring defence.
Along with science and technology development, Control Technique of Microcomputer has also used microcomputer technology to be used for environment is monitored in the industry-by-industry widespread use as forbidden zones such as prison, detention house, weapons and ammunitions storehouse, national treasuries.Present employed supervising device generally adopts infrared ray, inductive switch control warning circuit, and these method rate of false alarm height and corresponding apparatus cost are higher, the construction trouble.
The purpose of this utility model is: design a kind of with low cost, construction is simple and can reduce the grid alarm control device of rate of false alarm.
The utility model comprises by CPU, latch, the central control circuit that code translator is formed, the data acquisition circuit that is connected with central control circuit, display circuit, grid power supply circuit and control circuit thereof, said grid power supply circuit comprises the change resistance circuit that is connected on the power lead, the low pressure end of its output termination voltage transformer (VT), the control end that becomes resistance circuit is connected with the feed circuit control end of central control circuit, data acquisition circuit is connected to the low pressure end of voltage transformer (VT), it comprises transformation, filtering circuit, its output terminal is connected with central control circuit by the A/D change-over circuit.
The utility model has adopted change resistance circuit and the voltage transformer (VT) that is connected with power lead (being generally civil power), voltage on the power lead is converted to extra-high voltage through voltage transformer (VT) and is added on the electrical network, gathers the data at voltage transformer (VT) two ends simultaneously by data acquisition circuit.Certainly, also can realize monitoring purpose by gathering the data that become resistance circuit.After electrical network powered up, if there is the people to get an electric shock, electrical network approached the instantaneous short circuit state, its voltage reduces, thereupon, voltage transformer (VT) low pressure end electric current increases, and this signal data acquisition circuit is delivered to central control circuit, relatively send shows signal by analysis, also can send alerting signal, the control end by feed circuit reduces the resistance that becomes resistance circuit simultaneously, and the low electric terminal voltage of voltage transformer (VT) increases, the voltage that drives on the electrical network increases, and gives electric shock person to hit.
Above-mentioned change resistance circuit can be made up of two resistance and three relays: resistance R 1, relay K 6, resistance R 2, relay K 7 head and the tail successively are connected to form closed loop, the two ends of relay K 5 are connected between resistance R 1 and the relay K 7 respectively and between resistance R 2 and the relay K 6, resistance R 1 is this input and output side that becomes resistance circuit with node, the resistance R 2 of relay K 6 with the node of relay K 7, and the control end of above-mentioned each relay is connected with the feed circuit control end of central control circuit.
For ease of determining the electric shock position, can be with the electrical network subregion, each electrical network district is carried out the cycle control that the certain hour interval is arranged, its implementation is as follows: have the parallel circuit of at least two supply relays to be series in the feed circuit on power lead, make the voltage transformer (VT) in each electrical network district be connected to the output terminal of each supply relay.
Central control circuit can be formed by code translator, latch, driving circuit and not gate by cpu signal successively to the feed circuit control signal.
Physical circuit of the present utility model is optional uses following version: said central control circuit comprises CPU8031, latch 373, storer 2764 and code translator 138, wherein the P0 port of CPU connects data/address multiplex bus, it is connected with storer by latch, and it also connects the A/D change-over circuit; P1 is an output control terminal; Among the P2 three connect status display circuit, voltage display circuit and latch 273 by code translator, and this latch connects the control end that becomes resistance circuit and supply relay through driving circuit 241 and not gate and resistance successively; P2 has five to be connected with storer in addition.
Data acquisition circuit then comprises transformer, and the output terminal of transformer connects rheostat, rheostatic adjusting termination A/D change-over circuit by the resistance and the diode of series connection.
In addition, the output control terminal of central control circuit connects the interlock output circuit, and this circuit is made up of at least two user's relay drive circuits of parallel connection and user's relay of its control.It is used for central control circuit sends signal and makes the adhesive simultaneously of user's relay when having the people to get an electric shock, to start video camera, illuminating lamp, warning circuit etc.
Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated.
Fig. 1 is the schematic diagram of the utility model embodiment;
Fig. 2 is the circuit diagram of present embodiment central control circuit;
Fig. 3 is the circuit diagram of state demonstration and power-supplying circuit;
Fig. 4 is the circuit diagram of grid power supply circuit;
Fig. 5 is the circuit diagram of data acquisition circuit;
Fig. 6 is interlock output circuit figure;
Present embodiment is by central control circuit, the data acquisition circuit that is connected with central control circuit, display circuit, warning circuit and user's control relay circuit, reset circuit, grid power supply circuit and control circuit thereof.Wherein, central control circuit comprises central controller (CPU) 8031, and the latch 74LS373 that is connected with its P0 port, the storer 2764 that is connected with this latch, two code translator 74LS138 that are connected with CPU form.Wherein the P0 port of CPU connects data/address bus, and the output line of P1 connects the driving circuit of each user's relay, thereby controls each user's relay, realizes interlock output, to start facilities such as light, warning, shooting simultaneously.Low five address ports that connect storer among the P2, the Senior Three position connects the control circuit of A/D change-over circuit in the data acquisition circuit, status display circuit, voltage display circuit, warning circuit, feed circuit through code translator.Reset circuit, the display circuit of present embodiment are same as the prior art, repeat no more here.And data acquiring control circuit is formed by the latch 74LS273 that is connected with code translator, drive circuit chip 74LS241 and with the series circuit of respectively exporting termination not gate and resistance of driving circuit, and it is output as the control end of grid power supply circuit.The grid power supply circuit of present embodiment comprises the supply relay of the change resistance circuit that is series between the 220V power supply, four parallel connections and is connected to the voltage transformer (VT) of each supply relay output terminal that supply relay wherein adopts solid-state relay.Above-mentioned change resistance circuit is made up of two resistance R 1, R2, three solid-state relay K5, K6, K7, resistance R 1, relay K 6, resistance R 2, the end to end successively formation closed loop of relay K 7, the two ends of relay K 5 are connected on respectively between resistance R 1 and the relay K 7 and reach between resistance R 2 and the relay K 6.Resistance R 1 connects power supply and voltage transformer (VT) with node, the resistance R 2 of relay K 6 respectively with the node of relay K 7.The get access to grid control end of feed circuit of the control end of above-mentioned each solid-state relay.The data acquisition circuit of present embodiment is connected to the parallel circuit and the voltage transformer (VT) two ends of supply relay, and it comprises transformer, connects a rheostat again after diode filtering and the further step-down of resistance, rheostatic adjusting termination A/D change-over circuit.
The utility model must be provided with data such as alarm voltage before use, and it can judge the reason that power network signal changes comparatively exactly.After the energized, CPU begins the content of executive memory, transmits data to the solid-state relay driving circuit earlier, controls four solid-state relays and connects successively.It is as follows that order is crossed in the connection of four solid-state relays: solid-state relay 1 is connected, the low pressure end of voltage transformer (VT) 1 is received on the power lead of 220V, 50HZ, and the high-pressure side of voltage transformer (VT) 1 is pressurized to electrical network one district, at this moment, solid- state relay 2,3,4 cuts out, and electrical network two, three, four districts do not have.Delay time after 240 milliseconds, solid-state relay 2 is connected, and there is electricity in electrical network two districts, and other electrical network district does not have.Afterwards by the connection that circulates successively of each electrical network district of above-mentioned rule.If someone contacts electrical network, the voltage in this electrical network district reduces, and promptly the voltage of the voltage transformer (VT) high-pressure side that is connected with the electrical network district reduces.According to the principle of work of voltage transformer (VT), the voltage of this voltage transformer (VT) low pressure end reduces simultaneously, thereby the voltage between the transformer output line reduces, so the change in voltage of transformer output has reflected the change in voltage on the electrical network.Above-mentioned variable signal is delivered to central control circuit by the A/D conversion, and shows each electrical network zone state and voltage value by display circuit.Central control circuit will gather extremely data and the numeric ratio of setting, judge whether the someone contacts electrical network, if determine, then start the interlock output circuit, open light, video camera, warning circuit etc.
Can be found out by structure of the present utility model, it have with low cost, construction is simple and can reduce and miss The characteristics of newspaper rate.
Claims (7)
1, a kind of grid alarm control device, comprise by CPU, latch, the central control circuit that code translator is formed, the data acquisition circuit that is connected with central control circuit, display circuit, grid power supply circuit and control circuit thereof, it is characterized in that: said grid power supply circuit comprises the change resistance circuit that is connected on the power lead, the low pressure end of its output termination voltage transformer (VT), the control end that becomes resistance circuit is connected with the feed circuit control end of central control circuit, data acquisition circuit is connected to the low pressure end of voltage transformer (VT), it comprises transformation, filtering circuit, its output terminal is connected with central control circuit by the A/D change-over circuit.
2, grid alarm control device according to claim 1, it is characterized in that: said change resistance circuit is made up of two resistance and three relays: resistance R 1, relay K 6, resistance R 2, relay K 7 head and the tail successively are connected to form closed loop, the two ends of relay K 5 are connected between resistance R 1 and the relay K 7 respectively and between resistance R 2 and the relay K 6, resistance R 1 is this input and output side that becomes resistance circuit with node, the resistance R 2 of relay K 6 with the node of relay K 7, and the control end of above-mentioned each relay is connected with the feed circuit control end of central control circuit.
3, grid alarm control device according to claim 1 and 2 is characterized in that: have the parallel circuit of at least two supply relays to be series in the feed circuit on the power lead, the voltage transformer (VT) of respective numbers is connected to the output terminal of each supply relay.
4, according to the described grid alarm control device of claim 3, it is characterized in that: cpu signal is successively by code translator, latch, driving circuit and not gate, and its output constitutes the feed circuit control end.
5, grid alarm control device according to claim 4, it is characterized in that: said central control circuit comprises CPU8031, latch 373, storer 2764 and code translator 138, wherein the P0 port of CPU connects data/address multiplex bus, it is connected with storer by latch, and it also connects the A/D change-over circuit; P1 is an output control terminal; Among the P2 three connect status display circuit, voltage display circuit and latch 273 by code translator, and this latch connects the control end that becomes resistance circuit and supply relay through driving circuit 241 and not gate and resistance successively; P2 has five to be connected with storer in addition.
6, grid alarm control device according to claim 5, it is characterized in that: said data acquisition circuit comprises transformer, the output terminal of transformer connects rheostat, rheostatic adjusting termination A/D change-over circuit by the resistance and the diode of series connection.
7, grid alarm control device according to claim 1 and 2 is characterized in that: the output terminal of central control circuit connects user's relay of at least one user's relay drive circuit and control thereof, above-mentionedly respectively organizes the circuit parallel connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98222914 CN2355387Y (en) | 1998-11-13 | 1998-11-13 | Electric network alarming and controlling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98222914 CN2355387Y (en) | 1998-11-13 | 1998-11-13 | Electric network alarming and controlling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2355387Y true CN2355387Y (en) | 1999-12-22 |
Family
ID=33974136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98222914 Expired - Fee Related CN2355387Y (en) | 1998-11-13 | 1998-11-13 | Electric network alarming and controlling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2355387Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103268353A (en) * | 2013-06-03 | 2013-08-28 | 国家电网公司 | Power grid alarming automatic response system and power grid alarming automatic response method |
-
1998
- 1998-11-13 CN CN 98222914 patent/CN2355387Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103268353A (en) * | 2013-06-03 | 2013-08-28 | 国家电网公司 | Power grid alarming automatic response system and power grid alarming automatic response method |
| CN103268353B (en) * | 2013-06-03 | 2016-01-20 | 国家电网公司 | Grid alarm auto response system and grid alarm automatic response method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |