CN218037134U - Power distribution terminal export hard clamp plate state detection circuit based on active detection - Google Patents
Power distribution terminal export hard clamp plate state detection circuit based on active detection Download PDFInfo
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Abstract
The utility model relates to a distribution terminal exports hard clamp plate state detection circuitry based on active detection belongs to the technical field of measurement, test. The detection circuit includes: the detection module with keeping apart the opto-coupler as core device, with the isolation power of export distribution terminal export relay operating circuit common ground, utilize the change of opto-coupler output level when hard clamp plate drops into or withdraws from, effective real-time detection hard clamp plate contact state, the unable hard clamp plate state of accurately reflecting distribution terminal export in real time provides support for distribution terminal's maintenance work. The detection circuit does not need human eyes to identify a detection result, does not need to transform a hard pressing plate structure, is simple to realize and low in cost, and has universality on the hard pressing plate which leaves a factory.
Description
Technical Field
The utility model relates to a distribution terminal export hard clamp plate state detection circuitry based on active detection relates to DTU, FTU's export hard clamp plate state detection technique, belongs to the technical field of measurement, test.
Background
At present, an open-end controller on a column and a power distribution terminal such as a ring main unit and a ring main unit are provided with an obvious fracture at an outlet of a controller so as to ensure the safety of maintenance personnel during maintenance, and a hard pressing plate is arranged on an outlet loop of the controller and is electrically connected in a mechanical extrusion mode. Hard clamp plate suppliers on the market are numerous, the supplied hard clamp plates are different in size and quality and have no unified standard, the condition of poor contact can often occur, the outlet fault of the controller is caused, the faults caused by most of poor contact are hidden, the faults cannot be detected visually, and the trouble is brought to the maintenance of the power distribution terminal device.
The existing hard pressing plate detection technology needs to modify a hard pressing plate, for example, an infrared detection device is integrated on the hard pressing plate, and a pressing plate on-off detection module is integrated on the hard pressing plate, the modification schemes require that the hard pressing plate is specially made, the specially made hard pressing plate is complex in structure and high in cost, the hard pressing plate state information acquired by a device integrated on the hard pressing plate needs a human eye identification controller outlet hard pressing plate switching state of an operation and maintenance worker, the response speed of a power distribution terminal such as a DTU (data transfer unit) and an FTU (fiber to the unit) to the fault caused by poor contact of the outlet hard pressing plate is low, and the automation degree needs to be improved.
In view of the defect that the existing hard pressing plate detection technology cannot rapidly and effectively detect the throw-in and retreat states of the DTU and FTU outlet hard pressing plates, it is very necessary to design a power distribution terminal hard pressing plate state monitoring circuit based on active detection to solve the problems.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an invention purpose is to the not enough of above-mentioned background art, provides a distribution terminal export hard clamp plate state detection circuitry based on active detection, realizes effectively detecting the invention purpose that the hard clamp plate of export thrown and moves back the state, solves current hard clamp plate detection technology and needs combine the technical problem that the hard clamp plate of human eye discernment acquireed distribution terminal export thrown and move back the state.
The utility model adopts the following technical proposal for realizing the purpose of the invention:
a distribution terminal exports hard clamp plate state detection circuitry based on active detection, includes:
a detection module, one detection terminal of which is connected with the connection point of the hard pressure plate and the outlet relay disconnecting link, the other detection terminal of which is connected with the connection point of the hard pressure plate and the outlet end of the opening and closing switch, and outputs the level representing the state of the hard pressure plate when the hard pressure plate is put in or put out, and,
the isolation power supply provides an isolation power supply for the detection module and is grounded together with an operation power supply of the power distribution terminal outlet relay; wherein,
the detection module includes: the high-voltage direct current power supply comprises an anti-reverse voltage-stabilizing tube, a fly-wheel diode, a first voltage-dividing resistor, a second voltage-dividing resistor, a third voltage-dividing resistor, a pull-up resistor, a first filtering capacitor, a second filtering capacitor and an isolation optocoupler, wherein the anode of the anti-reverse voltage-stabilizing tube is connected with a positive power supply of an isolation power supply, the cathode of the anti-reverse voltage-stabilizing tube is connected with one end of the first voltage-dividing resistor, the other end of the first voltage-dividing resistor is connected with one end of the second voltage-dividing resistor, one end of a hard voltage plate and one end of an outlet relay disconnecting switch, the other end of the outlet relay disconnecting switch is connected with the anode of a power distribution terminal outlet relay operation power supply, the other end of the second voltage-dividing resistor is connected with the cathode of the fly-wheel diode, one end of the first filtering capacitor and the anode of the isolation optocoupler, one end of the third voltage-dividing resistor and the other end of the hard voltage-pressing plate are connected as the outlet end of the power supply of the power distribution terminal outlet relay operation power supply, the collector of the isolation freewheeling diode is connected with one end of the pull-up resistor and one pole of the second voltage-dividing resistor, and the other end of the output point of the output filter capacitor is connected with the pull-up resistor, and the other end of the output point of the output signal of the output node of the output filter capacitor.
Still further, in the power distribution terminal outlet hard pressing plate state detection circuit based on active detection, the type of the isolation optocoupler is HCPL-181-00CE.
Still further, in the distribution terminal outlet hard pressure plate state detection circuit based on active detection, an outlet relay operation power supply is 48V or 24V direct current, and an isolation power supply is 24V or 12V or 5V direct current.
Further, a power distribution terminal outlet hard platen condition detection based on active detection is integrated within a power distribution terminal.
The utility model adopts the above technical scheme, following beneficial effect has:
(1) The utility model discloses a detection circuitry adopts and keeps apart mains operated, and keeps apart power and operating power supply altogether, under the normal export function condition not influencing, exports different level signals when detecting out hard clamp plate input or withdraw from, can effectively detect the hard clamp plate state of export, and the circuit is realized simply, and the cost is extremely low.
(2) The utility model discloses a detection circuitry can adjust the exit and float the pressure under the different situation that hard clamp plate drops into or withdraws from, effectively reduces the export and goes out floating voltage.
(3) The utility model discloses a detection circuitry is integrated inside distribution terminal, and the reliability is high, and CPU can acquire hard clamp plate state in real time, can in time send hard clamp plate state detected signal to backstage monitored control system through communication device simultaneously, for distribution terminal maintains and provides support, is convenient for fortune dimension.
(4) Utilize the utility model discloses a detection circuitry detects distribution terminal export hard clamp plate state need not to change the structure that has hard clamp plate, has the universality to the hard clamp plate that dispatches from the factory.
Drawings
Fig. 1 is a block diagram of the hard platen state detection circuit of the present invention.
Fig. 2 is a specific circuit diagram of the hard platen state detection circuit of the present invention.
Fig. 3 is the equivalent circuit diagram of the utility model discloses detection circuitry inserts the export of distribution terminal under the hard clamp plate withdraws from the situation.
Fig. 4 is the utility model discloses the equivalent circuit diagram of detection circuitry access distribution terminal export under the hard clamp plate drops into the situation.
The reference numbers in the figures illustrate: r1, R2 and R3 are first, second and third voltage dividing resistors, D1 is a freewheeling diode, D2 is an anti-reverse voltage stabilizing tube, C1 and C2 are first and second filter capacitors, R4 is a pull-up resistor, and U1 is an isolation optocoupler.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the accompanying drawings.
The utility model relates to a join in marriage net terminal export hard clamp plate state detection circuitry is shown in fig. 1, contains and keeps apart power and detection circuitry two parts, keeps apart the power and is used for providing the power for detection circuitry, and detection circuitry produces a level respectively when detecting hard clamp plate and being in to drop into or withdraw from under the state export relay, can judge hard clamp plate state according to the level that detection circuitry produced. Under the condition that the hard pressing plate is withdrawn, after the outlet relay acts, the voltage of the outlet end of the switching on/off switch is equal to the operating voltage, which causes troubles to operation and maintenance.
As shown in fig. 2, the detection circuit includes an anti-reverse voltage regulator D2, a freewheeling diode D1, a first voltage dividing resistor R1, a second voltage dividing resistor R2, a third voltage dividing resistor R3, a pull-up resistor R4, a first filter capacitor C1, a second filter capacitor C2, and an isolation optocoupler U1. The anode of the anti-reverse voltage stabilizing tube D2 is connected with the positive power supply V _ ISO of the isolation power supply, and the cathode of the anti-reverse voltage stabilizing tube D2 is connected with one end of the first divider resistor R1; the other end of the first divider resistor R1 is connected with one end of the second divider resistor R2, one end of the hard pressing plate and one end of the outlet relay disconnecting link, and the other end of the outlet relay disconnecting link is connected with an operation power supply anode KM +; the other end of the second voltage-dividing resistor R2 is connected with the cathode of the freewheeling diode D1, one pole of the first filtering capacitor C1 and the anode of the isolation optocoupler U1, wherein the first filtering capacitor C1 is connected with the freewheeling diode D1 in parallel; the anode of the freewheeling diode D1 is connected with the cathode of the isolation optocoupler U1, one end of the third voltage-dividing resistor R3 and the other end of the hard pressing plate, and the connecting point is used as an opening and closing brake outlet end FZ/HZ; the other end of the third voltage dividing resistor R3 is connected with an isolated power ground, namely an operation power negative electrode KM-; the collector of the isolation optocoupler U1 is connected with one end of a pull-up resistor R4 and one pole of a second filter capacitor C2, the other pole of the pull-up resistor R4 is connected with 3.3V direct current, the other pole of the second filter capacitor C2 is connected with a signal ground GND, and the pull-up resistor R4 is a pull-up resistor on the weak current side and an RC filter resistor. When the detection circuit detects that the hard pressing plate is in an input or exit state, the level of the connection point of the pull-up resistor R4 and the second filter capacitor C2 changes, and the state information of the hard pressing plate can be obtained by acquiring the level of the connection point and carrying out remote signaling filtering processing on the level. The isolation optocoupler U1 can be an optocoupler with the model of HCPL-181-00CE.
The function of the voltage stabilizing tube D2 is as follows: protecting the isolated power supply when the operating power supply is greater than the isolated power supply; the freewheeling diode D1 functions as: when an interference signal is introduced from the negative end of the isolation power supply, the built-in diode of the isolation optocoupler U1 is in short circuit connection, and the isolation optocoupler is protected. The first filter capacitor C1, the second filter capacitor C2 and the pull-up resistor R4 can effectively reduce the interference of external vibration and remote signaling jitter on signal acquisition.
The operating power supply of the outlet relay is generally 48V or 24V direct current, the isolation power supply preferably selects 24V, 12V or 5V direct current, and the floating pressure at the outlet end of the opening and closing switch and the power consumption of the circuit are reduced as much as possible under the normal state.
When hard clamp plate withdraws from, the utility model relates to an equivalent circuit that detection circuitry inserts the export of distribution terminal is shown as figure 3, confirms constraint condition 1:
wherein CTR is the current transmission ratio of the optical coupler, V ISO In order to isolate the power supply voltage, the voltage of the switching-on/switching-off outlet end FZ/HZ is controlled to be lower than direct current 2V.
When the hard pressing plate is withdrawn and the relay acts, determining a constraint condition 2:
wherein, V KM To operate the supply voltage.
When the hard pressing plate is put in, the equivalent circuit of the detection circuit connected to the outlet of the power distribution terminal is shown in fig. 4, and the constraint condition 3 is determined:
according to the impedance value of the electromagnet of the power distribution terminal spring operation mechanism, the circuit power consumption requirement and the EMC test requirement, determining a constraint condition 4:
and
wherein,
Determining the resistance values of the first to third divider resistors R1 to R3 according to constraint conditions 1 to 4; in addition, the resistance value of the pull-up resistor R4 can be determined according to experience, and the capacitance values of the first filter capacitor C1 and the second filter capacitor C2 are determined according to RC filter parameters.
The foregoing is only a preferred embodiment of the present invention, which is illustrative and not limiting of the present invention. The invention is not limited to the specific embodiments described herein, but rather, it is to be understood that various modifications, additions, substitutions, and equivalents may be made without departing from the spirit and scope of the invention as defined in the following claims.
Claims (4)
1. A distribution terminal outlet hard pressure plate state detection circuit based on active detection is characterized by comprising:
a detection module, one detection terminal of which is connected with the connection point of the hard pressure plate and the outlet relay disconnecting link, the other detection terminal of which is connected with the connection point of the hard pressure plate and the outlet end of the opening and closing switch, and outputs the level representing the state of the hard pressure plate when the hard pressure plate is put in or put out, and,
the isolation power supply provides the isolation power supply for the detection module and is grounded together with an operation power supply of the power distribution terminal outlet relay; wherein,
the detection module comprises: the high-voltage direct current output circuit comprises an anti-reverse voltage-stabilizing tube, a fly-wheel diode, a first voltage-dividing resistor, a second voltage-dividing resistor, a third voltage-dividing resistor, a pull-up resistor, a first filtering capacitor, a second filtering capacitor and an isolation optocoupler, wherein the anode of the anti-reverse voltage-stabilizing tube is connected with a positive power supply of an isolation power supply, the cathode of the anti-reverse voltage-stabilizing tube is connected with one end of the first voltage-dividing resistor, the other end of the first voltage-dividing resistor is connected with one end of the second voltage-dividing resistor, one end of a hard voltage plate and one end of an outlet relay disconnecting switch, the other end of the outlet relay disconnecting switch is connected with the anode of an outlet relay operation power supply of a power distribution terminal, the other end of the second voltage-dividing resistor is connected with the cathode of the fly-wheel diode, one electrode of the first filtering capacitor and the anode of the isolation optocoupler, the anode of the fly-wheel diode is connected with the other electrode of the first filtering capacitor, the cathode of the isolation optocoupler, one end of the third voltage-dividing resistor and the other end of the hard voltage plate are connected as output points of the output of the switch, and the other end of the second voltage-dividing resistor is connected with the pull-up resistor, and the other end of the output point of the output node of the output signal of the output resistor.
2. The power distribution terminal outlet hard platen state detection circuit based on active detection as claimed in claim 1, wherein the type of the isolation optocoupler is HCPL-181-00CE.
3. The power distribution terminal outlet hard platen state detection circuit based on active detection as claimed in claim 1, wherein the power distribution terminal outlet relay operation power supply is 48V or 24V dc, and the isolation power supply is 24V or 12V or 5V dc.
4. The power distribution terminal outlet hard platen state detection circuit based on active detection as claimed in any one of claims 1 to 3, wherein the detection circuit is integrated in a power distribution terminal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222174530.0U CN218037134U (en) | 2022-08-17 | 2022-08-17 | Power distribution terminal export hard clamp plate state detection circuit based on active detection |
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| CN202222174530.0U CN218037134U (en) | 2022-08-17 | 2022-08-17 | Power distribution terminal export hard clamp plate state detection circuit based on active detection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116774629A (en) * | 2023-06-16 | 2023-09-19 | 国网江苏省电力有限公司泰州供电分公司 | Intelligent monitoring module and method for relay protection outlet loop number |
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2022
- 2022-08-17 CN CN202222174530.0U patent/CN218037134U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116774629A (en) * | 2023-06-16 | 2023-09-19 | 国网江苏省电力有限公司泰州供电分公司 | Intelligent monitoring module and method for relay protection outlet loop number |
| CN116774629B (en) * | 2023-06-16 | 2024-01-23 | 国网江苏省电力有限公司泰州供电分公司 | A digital intelligent monitoring module for relay protection outlet circuit and method thereof |
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