CN214225283U - On-line monitoring circuit for cabinet insurance - Google Patents
On-line monitoring circuit for cabinet insurance Download PDFInfo
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- CN214225283U CN214225283U CN202022210960.4U CN202022210960U CN214225283U CN 214225283 U CN214225283 U CN 214225283U CN 202022210960 U CN202022210960 U CN 202022210960U CN 214225283 U CN214225283 U CN 214225283U
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Abstract
The invention belongs to the technical field of nuclear power maintenance, and particularly relates to an on-line monitoring circuit for a cabinet fuse.A detection port comprises a plurality of detection channels, and a switch array comprises a plurality of switches; each detection channel is connected with a switch in series, each switch is connected with a voltage detection module, the voltage detection module is connected with a controller, and each detection channel is used for transmitting an electric signal to be processed of a connected fuse to be detected; the power supply is connected with the voltage detection module and used for outputting an excitation electric signal to the voltage detection module; each switch is also connected with a controller respectively, and the controller is used for controlling the disconnection or connection of the switches; for each detection channel, under the condition that the switch connected with the detection channel is closed and the switches connected with other detection channels are opened, the electric signal to be processed transmitted by the detection channel is input to the voltage detection module and processed by the voltage detection module to form voltage data, and the controller acquires and stores the voltage data corresponding to the detection channel from the voltage detection module.
Description
Technical Field
The utility model belongs to the technical field of the nuclear power maintenance, concretely relates to machine cabinet insurance on-line monitoring circuit.
Background
In the related art, fuses are arranged in switching value loops of cabinets of Distributed Control Systems (DCS) of nuclear power stations, when faults occur to cause the fuses in the cabinets to be fused, the switching value loops of the cabinets are disconnected, the traditional DCS cabinets of the nuclear power stations cannot indicate the phenomenon that the fuses are fused, and therefore under the condition that the fuses of the DCS cabinets are fused, if the clamping pieces of the cabinets send signals, due to the fact that the switching value loops are disconnected, DCS field equipment cannot act, and therefore the states of the fuses need to be effectively checked and guaranteed.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problems in the related art, the on-line monitoring circuit for the safety of the machine cabinet is provided.
According to an aspect of the embodiments of the present disclosure, an online cabinet fuse monitoring circuit is provided, which includes: the detection device comprises a detection port, a switch array, a voltage detection module, a power supply and a controller, wherein the detection port comprises a plurality of detection channels, and the switch array comprises a plurality of switches;
each detection channel is connected with a switch in series, each switch is connected with the voltage detection module, the voltage detection module is connected with the controller, and each detection channel is used for transmitting an electric signal to be processed of the connected fuse to be detected;
the power supply is connected with the voltage detection module and used for outputting an excitation electric signal to the voltage detection module;
each switch is also respectively connected with the controller, and the controller is used for controlling the plurality of switches to be disconnected or connected;
for each detection channel, when the switch connected with the detection channel is closed and the switches connected with other detection channels are opened, the electric signal to be processed transmitted by the detection channel is input to the voltage detection module and processed by the voltage detection module to form voltage data, and the controller acquires and stores the voltage data corresponding to the detection channel from the voltage detection module.
In one possible implementation manner, the voltage detection module includes a resistance module, a voltage follower and a differential amplifier which are connected in series in sequence;
each switch is respectively connected with the resistance module, the power supply is connected with the resistance module, and the impedance of the resistance module can enable the voltage detection module to form an open circuit;
the controller is connected with the differential amplifier, and the electric signals to be processed transmitted by the detection channel sequentially pass through the voltage follower and the differential amplifier to form voltage data.
In one possible implementation, the output voltage of the power supply is 3.3 volts, and the resistance value of the resistance module is 180 kohms.
In one possible implementation, the resistor module includes 12 resistors connected in series, and each resistor has a resistance of 15 kilo-ohms.
In a possible implementation manner, the cabinet insurance online monitoring circuit further includes a first indicator light and a second indicator light;
the first indicator light is connected with the power supply through a normally open switch, and the second indicator light is connected with the power supply through the normally open switch;
the controller comprises a first trigger circuit and a second trigger circuit, the first trigger circuit is connected with a normally open switch of the first indicator light, and the second trigger circuit is connected with a normally open switch of the second indicator light;
when the voltage data received by the first trigger circuit accords with a first trigger threshold value of the first trigger circuit, sending a control signal to a normally open switch of the first indicator lamp to control the normally open switch of the first indicator lamp to be closed, so that the first indicator lamp emits light;
when the voltage data received by the second trigger circuit accords with a second trigger threshold value of the second trigger circuit, a control signal is sent to a normally open switch of the second indicator light to control the normally open switch of the second indicator light to be closed, so that the second indicator light emits light, and the first trigger threshold value is higher than the second trigger threshold value.
In a possible implementation manner, the cabinet insurance online monitoring circuit further includes a buzzer;
the buzzer is connected with the power supply through a normally open switch;
the first trigger circuit is connected with a normally open switch of the buzzer;
when the voltage data received by the first trigger circuit accords with a first trigger threshold value of the first trigger circuit, a control signal is sent to a normally open switch of the buzzer to control the normally open switch of the buzzer to be closed, so that the buzzer sends out a prompt sound.
In one possible implementation manner, the power source is a battery, and the cabinet fuse online monitoring circuit further includes: the power supply management circuit and the charging interface;
the power management circuit is connected with the charging interface, and the battery is connected with the power management circuit.
In one possible implementation manner, the switch of the cabinet fuse online monitoring circuit is a photoelectric coupling switch.
The beneficial effects of the utility model reside in that: the cabinet fuse on-line monitoring circuit can carry out on-off detection on a plurality of cabinet fuses, can detect the fuses under the condition that a disconnecting link and the fuses are not opened and electrified, can carry out on-line detection, cannot influence an operating control system, and eliminates hidden dangers when the control system operates.
Drawings
Fig. 1 is a block diagram illustrating an on-line monitoring circuit for a cabinet fuse according to an exemplary embodiment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a block diagram illustrating an on-line monitoring circuit for a cabinet fuse according to an exemplary embodiment. As shown in fig. 1, the on-line cabinet insurance monitoring circuit may include: the detection device comprises a detection port, a switch array, a voltage detection module, a power supply and a controller, wherein the detection port comprises a plurality of detection channels, and the switch array comprises a plurality of switches;
each detection channel can be connected with a switch in series, each switch is connected with the voltage detection module, the voltage detection module is connected with the controller, each detection channel can be connected with a fuse to be detected, and each detection channel can be used for transmitting an electric signal to be processed of the connected fuse to be detected;
the power supply is connected with the voltage detection module and used for outputting an excitation electric signal to the voltage detection module; each switch is also connected with the controller respectively, and the controller is used for controlling the plurality of switches to be opened or closed, wherein the controller can be a single chip microcomputer or the like, and the type of the controller is not limited in the embodiment of the disclosure.
In the detection process, for each detection channel, when the switch connected with the detection channel is connected and the switches connected with other detection channels are disconnected, the electric signal to be processed transmitted by the detection channel is input to the voltage detection module and processed by the voltage detection module to form voltage data, and the controller can acquire and store the voltage data corresponding to the detection channel from the voltage detection module. The controller can sequentially control one switch to be closed and other switches of the controller to be opened when the switch is controlled to be closed, so that the controller can sequentially acquire and store a plurality of voltage data for indicating the on-off state of the fuse.
The cabinet fuse on-line monitoring circuit can carry out on-off detection on a plurality of cabinet fuses, can detect the fuses under the condition that a disconnecting link and the fuses are not opened and electrified, can carry out on-line detection, cannot influence an operating control system, and eliminates hidden dangers when the control system operates.
In one possible implementation manner, the voltage detection module may include a resistance module, a voltage follower, and a differential amplifier, which are connected in series in sequence; each switch can be respectively connected with the resistance module, the power supply is connected with the resistance module, and the impedance of the resistance module can enable the voltage detection module to form an open circuit; for example, the resistance value of the resistor module may be 180k Ω, and the resistor module includes 12 resistors connected in series, and each resistor has a resistance value of 15k Ω. Therefore, the resistance module can effectively resist the impact caused when the detection port is mistakenly connected with the 220VAC power supply.
The sampling precision of the voltage detection module can reach 0.8 mV. In order to improve the detection accuracy, the difference between the voltage value detected by the voltage module when the fuse is intact and the distinguishing voltage value of the voltage module on the fuse is at least more than 80 mV. If the impedance of the control loop at the two ends of the fuse can be about 6k Ω, it can be determined that the current value of the excitation signal should be greater than 13.3uA, so that the output voltage of the power supply can be 3.3V, and thus the current value of the excitation signal can be 18.3 uA.
The controller is connected with the differential amplifier, and the electric signals to be processed transmitted by the detection channel sequentially pass through the voltage follower and the differential amplifier to form voltage data.
In one possible implementation manner, the cabinet insurance online monitoring circuit may further include a first indicator light and a second indicator light; the first indicator light is connected with the power supply through a normally open switch, and the second indicator light is connected with the power supply through the normally open switch; the controller comprises a first trigger circuit and a second trigger circuit, the first trigger circuit is connected with a normally open switch of the first indicator light, and the second trigger circuit is connected with a normally open switch of the second indicator light; when the voltage data received by the first trigger circuit accords with a first trigger threshold value of the first trigger circuit, sending a control signal to a normally open switch of the first indicator lamp to control the normally open switch of the first indicator lamp to be closed, so that the first indicator lamp emits light;
when the voltage data received by the second trigger circuit accords with a second trigger threshold value of the second trigger circuit, a control signal is sent to a normally open switch of the second indicator light to control the normally open switch of the second indicator light to be closed, so that the second indicator light emits light, and the first trigger threshold value is higher than the second trigger threshold value. Therefore, the on-off state of the tested fuse can be visually displayed through the first indicator light and the second indicator light.
In a possible implementation manner, the cabinet insurance online monitoring circuit further includes a buzzer; the buzzer is connected with the power supply through a normally open switch; the first trigger circuit is connected with a normally open switch of the buzzer; when the voltage data received by the first trigger circuit accords with a first trigger threshold value of the first trigger circuit, a control signal is sent to a normally open switch of the buzzer to control the normally open switch of the buzzer to be closed, so that the buzzer sends out a prompt sound. Like this, can further remind maintainer through bee calling organ, help maintainer in time to get rid of the trouble.
In one possible implementation manner, the cabinet insurance online monitoring circuit further includes: the power supply management circuit and the charging interface; the power management circuit is connected with the charging interface, and the battery is connected with the power management circuit.
In one possible implementation, the switch of the on-line monitoring circuit for the cabinet fuse can be a photoelectric coupling switch. For example, the switch can be a 400V withstand voltage photoelectric coupling switch with model number PhotoMos-AQW 214 EH.
Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terms used herein were chosen in order to best explain the principles of the embodiments, the practical application, or technical improvements to the techniques in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (8)
1. The utility model provides a cabinet insurance on-line monitoring circuit which characterized in that, cabinet insurance on-line monitoring circuit includes: the detection device comprises a detection port, a switch array, a voltage detection module, a power supply and a controller, wherein the detection port comprises a plurality of detection channels, and the switch array comprises a plurality of switches;
each detection channel is connected with a switch in series, each switch is connected with the voltage detection module, the voltage detection module is connected with the controller, and each detection channel is used for transmitting an electric signal to be processed of the connected fuse to be detected;
the power supply is connected with the voltage detection module and used for outputting an excitation electric signal to the voltage detection module;
each switch is also respectively connected with the controller, and the controller is used for controlling the plurality of switches to be switched on or switched off;
for each detection channel, when the switch connected with the detection channel is closed and the switches connected with other detection channels are opened, the electric signal to be processed transmitted by the detection channel is input to the voltage detection module and processed by the voltage detection module to form voltage data, and the controller acquires and stores the voltage data corresponding to the detection channel from the voltage detection module.
2. The on-line cabinet fuse monitoring circuit according to claim 1, wherein the voltage detection module comprises a resistance module, a voltage follower and a differential amplifier which are connected in series in sequence;
each switch is respectively connected with the resistance module, the power supply is connected with the resistance module, and the impedance of the resistance module can enable the voltage detection module to form an open circuit;
the controller is connected with the differential amplifier, and the electric signals to be processed transmitted by the detection channel sequentially pass through the voltage follower and the differential amplifier to form voltage data.
3. The on-line cabinet fuse monitoring circuit of claim 2, wherein the output voltage of the power supply is 3.3 volts and the resistance value of the resistor module is 180 kilo-ohms.
4. The on-line cabinet fuse monitoring circuit according to claim 3, wherein the resistor module comprises 12 resistors connected in series, and each resistor has a resistance of 15 kilo-ohms.
5. The cabinet fuse on-line monitoring circuit of claim 1, further comprising a first indicator light and a second indicator light;
the first indicator light is connected with the power supply through a normally open switch, and the second indicator light is connected with the power supply through the normally open switch;
the controller comprises a first trigger circuit and a second trigger circuit, the first trigger circuit is connected with a normally open switch of the first indicator light, and the second trigger circuit is connected with a normally open switch of the second indicator light;
when the voltage data received by the first trigger circuit accords with a first trigger threshold value of the first trigger circuit, sending a control signal to a normally open switch of the first indicator lamp to control the normally open switch of the first indicator lamp to be closed, so that the first indicator lamp emits light;
when the voltage data received by the second trigger circuit accords with a second trigger threshold value of the second trigger circuit, a control signal is sent to a normally open switch of the second indicator light to control the normally open switch of the second indicator light to be closed, so that the second indicator light emits light, and the first trigger threshold value is higher than the second trigger threshold value.
6. The cabinet fuse on-line monitoring circuit of claim 5, further comprising a buzzer;
the buzzer is connected with the power supply through a normally open switch;
the first trigger circuit is connected with a normally open switch of the buzzer;
when the voltage data received by the first trigger circuit accords with a first trigger threshold value of the first trigger circuit, a control signal is sent to a normally open switch of the buzzer to control the normally open switch of the buzzer to be closed, so that the buzzer sends out a prompt sound.
7. The on-line cabinet fuse monitoring circuit of claim 1, wherein the power source is a battery, the on-line cabinet fuse monitoring circuit further comprising: the power supply management circuit and the charging interface;
the power management circuit is connected with the charging interface, and the battery is connected with the power management circuit.
8. The on-line cabinet fuse monitoring circuit according to claim 1, wherein the switch of the on-line cabinet fuse monitoring circuit is an opto-coupled switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022210960.4U CN214225283U (en) | 2020-09-30 | 2020-09-30 | On-line monitoring circuit for cabinet insurance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022210960.4U CN214225283U (en) | 2020-09-30 | 2020-09-30 | On-line monitoring circuit for cabinet insurance |
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| CN214225283U true CN214225283U (en) | 2021-09-17 |
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| CN202022210960.4U Active CN214225283U (en) | 2020-09-30 | 2020-09-30 | On-line monitoring circuit for cabinet insurance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114325183A (en) * | 2021-12-20 | 2022-04-12 | 广西交控智维科技发展有限公司 | Cabinet state monitoring circuit and method |
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2020
- 2020-09-30 CN CN202022210960.4U patent/CN214225283U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114325183A (en) * | 2021-12-20 | 2022-04-12 | 广西交控智维科技发展有限公司 | Cabinet state monitoring circuit and method |
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