CN111077443A - Drop switch monitoring device - Google Patents
Drop switch monitoring device Download PDFInfo
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- CN111077443A CN111077443A CN201911395352.0A CN201911395352A CN111077443A CN 111077443 A CN111077443 A CN 111077443A CN 201911395352 A CN201911395352 A CN 201911395352A CN 111077443 A CN111077443 A CN 111077443A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3272—Apparatus, systems or circuits therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3275—Fault detection or status indication
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Abstract
The invention discloses a drop switch monitoring device. The device comprises a shape monitoring terminal and a collecting gateway, wherein the shape monitoring terminal collects position and current signals of the fuse, and the collecting gateway judges the working state of the fuse according to the position and current signals. The invention realizes that one current transformer is adopted to take current sampling and charging functions into consideration, so that the size of a product is smaller, two power supply modes of a first rechargeable battery and a standby battery are adopted, so that power supply and working stability are provided, the judgment accuracy is improved by using three detection modes of switch detection, angle detection and current detection, the clock chip is used for waking up the first processor for active detection at regular time, the abnormal condition of a switch detection unit is avoided, the abnormal condition of the switch detection unit and the abnormal condition of the angle detection unit can be judged by comparing the results of the switch detection and the angle detection during active detection, the monitoring accuracy of a fuse is greatly improved, and the service life of the battery can be prolonged.
Description
Technical Field
The invention relates to the field of power monitoring equipment, in particular to a monitoring device for a drop switch.
Background
The drop-out fuse has the characteristics of economy, convenient operation, strong adaptability to outdoor environment and the like, is widely applied to 10kV distribution lines and distribution transformers, and is used as a component for protecting and carrying out equipment throwing and cutting operations. Because the drop-out fuse is not monitored in the prior art, when the drop-out fuse is fused due to overcurrent, a maintainer cannot know that the fuse breaks down in time, so that the maintainer cannot process the fault in time, and a relevant area is powered off for a long time.
In recent years, some drop-out fuse monitoring means have appeared, such as the following application numbers: 201620582342.3 discloses a passive auxiliary monitoring system for position signals of a drop-out fuse, which adopts a ball switch or a mercury switch to judge whether the drop-out fuse falls or not, and then outputs signals in a wired mode through a passive contact signal output module. And as disclosed in the invention patent application with application number 201410256187.1, the intelligent drop-out fuse is triggered to wake up a single chip computer when a gravity sensing detection circuit detects that the drop-out fuse falls off, and the working mode has low reliability. Specifically, when the gravity sensing detection circuit fails, a drop event cannot be sensed when the drop fuse falls, or the drop event information cannot be sent out, so that the drop fuse cannot be normally monitored.
The drop-out fuse is an ideal state when a fuse wire is fused, but when the drop-out fuse is used in reality, the drop-out fuse cannot fall normally when the fuse wire is fused due to the fact that the rotating resistance of a rotating shaft is large caused by the fact that the drop-out fuse is not installed correctly, sundries are blocked or the environment is bad, and under the condition, the drop-out fuse cannot be detected to be in a fused and non-falling state currently only through means such as switch detection and angle detection, and maintainers cannot know that the fuse wire fails in time, so that the failure cannot be handled in time, and long-time power failure of relevant areas is caused.
In addition, when the existing power terminal needs to be charged and current is sampled, two current transformers are generally adopted to respectively carry out charging and sampling work, the terminal needs to be installed on a drop-out fuse, and the two current transformers are adopted to enable the product to be large and not beneficial to use.
Disclosure of Invention
The invention aims to provide a monitoring device for a drop switch, aiming at the defects in the prior art.
In order to achieve the purpose, the invention provides a drop switch monitoring device which comprises three monitoring terminals and a collecting gateway, wherein the three monitoring terminals are respectively arranged on three-phase corresponding drop fuses, each monitoring terminal is used for collecting the position state and the current signal of one phase of the drop fuse, the three monitoring terminals are respectively in wireless connection with the collecting gateway so as to send the collected position state and the collected current signal of the three-phase drop fuse to the collecting gateway, and the collecting gateway is used for judging the working state of the three-phase drop fuse according to the position state and the current signal of the three-phase drop fuse and sending the position state, the current signal and the working state of the three-phase drop fuse.
Further, including fixing the shell in the fuse outside, be equipped with state detection unit, first treater D4, first wireless communication module, first power module and current transformer in the shell, state detection unit is connected with first treater D4 for detect the position state of drop out fuse, current transformer and first treater D4 are connected with first switch chip D2 respectively, first power module includes charging circuit and the first rechargeable battery who is connected with charging circuit, first switch chip D2 is connected with current sampling circuit and charging circuit respectively, first treater D4 controls current transformer and current sampling circuit or charging circuit switch-on through first switch chip D2 to carry out current sampling or charge first rechargeable battery, first treater D4 is connected with first wireless communication module to control first wireless communication module and send the fuse drop out position state information and the current data that gather to send And (6) discharging.
Further, first power module still includes the spare battery, first rechargeable battery and spare battery are connected with second switch chip D3 respectively, second switch chip D3 obtains operating voltage from the spare battery, be connected with electric quantity feedback circuit between first treater D4 and the first rechargeable battery, work as when first rechargeable battery's electric quantity is higher than and sets for the threshold value, first treater D4 controls first rechargeable battery through second switch chip D3 and supplies power to the terminal, work as when first rechargeable battery's electric quantity is less than and sets for the threshold value, first treater D4 controls the spare battery through second switch chip D3 and supplies power to the terminal.
Further, the state detection unit comprises a switch detection unit connected with the first processor D4, when the switch detection unit does not detect that the drop-out fuse falls, the first processor D4 operates in a sleep state, the switch detection unit wakes up the first processor D4 when detecting that the drop-out fuse falls, the first processor D4 and the standby battery are further connected with a clock chip D5, the clock chip D5 wakes up the first processor D4 at a set time interval, the state detection unit further comprises an angle detection unit, the first processor D4 controls the angle detection unit and the first switch chip D2 to work in the wake-up state, and controls the first wireless communication module to send out position state information and current data of the drop-out fuse.
Further, the current sampling circuit comprises a resistor R15 and a resistor R16, one ends of the resistor R15 and the resistor R16 are respectively connected with two ends of the current transformer, the other ends of the resistor R18 are connected with each other, the other end of the resistor R15 is connected with one end of a resistor R21, the other ends of the resistor R21 and the resistor R16 are respectively connected with the first processor D4, the resistor R18 is connected with a capacitor C27 in parallel, and a capacitor C29 is connected between the other ends of the resistor R21 and the resistor R16.
Further, the switch detecting unit includes a position switch Q4, one end of the position switch Q4 is connected to the positive electrode of the first power module through a resistor R46, and the other end thereof is connected to the first processor D4, and the position detecting switch Q4 includes a mercury switch or a ball switch.
Further, the angle detection unit comprises an angle sensor D1 connected with the first processor D4 and a power supply control circuit connected between the angle sensor D1 and the first processor D4, the power supply control circuit comprises a triode VT1 with an emitter connected with the first processor D4, a base of the triode VT1 is connected with the first processor D4 through a resistor R11, a collector of the triode VT1 is connected with the angle sensor D1 through a resistor R13 and a resistor R5 in sequence, a position between the angle sensor D1 and the resistor R5 is connected with one end of a capacitor C18, the other end of the capacitor C18 is grounded, a capacitor C24 is connected between the emitter of the triode VT1 and the ground, and a capacitor C23 is connected between the collector of the triode VT1 and the ground.
Further, the convergence gateway includes a second wireless communication module wirelessly connected to the first wireless communication module, the second wireless communication module is connected to the second processor D15, and the second processor D15 is connected to a power supply module and a reporting communication unit.
Further, the power module includes a switch power supply, the switch power supply is connected with a second charging circuit and a third switch chip D11, the second charging circuit and the third switch chip D11 are respectively connected with a second charging battery, a voltage stabilizing circuit is connected between the third switch chip D11 and the second processor D15, the second charging circuit and the third switch chip D11 are respectively connected with the second processor D15, the third switch chip D11 is powered by the second charging battery, and is controlled by the second processor D15 to realize that the switch power supply or the second charging battery supplies power to the collection gateway, and a voltage feedback circuit is connected between the output end of the second charging circuit and the second processor D15.
Further, a display unit is connected to the second processor D15, and the display unit includes a plurality of LED indicator lights.
Has the advantages that: 1. the device consists of a shape monitoring terminal arranged on the drop-out fuse and a convergence gateway wirelessly connected with the shape monitoring terminal, wherein the shape monitoring terminal has smaller volume and lower power consumption, is prevented from being limited by installation, is not limited by installation and is convenient for power taking, and can adopt a high-power reporting communication unit to communicate with a remote real-time system;
2. the shape monitoring terminal adopts a current transformer, and the current transformer is switched by the first switch chip to be communicated with the current sampling circuit or the charging circuit, so that current sampling and charging of a first rechargeable battery can be switched, and compared with the conventional two current transformers, the size of a product can be reduced;
3. the shape monitoring terminal adopts two power supply modes of the first rechargeable battery and the standby battery, so that the power supply and working stability can be improved, and the replacement time of the battery is prolonged;
4. the state monitoring terminal is fixed on the drop-out fuse, when the fuse is fused and drops, the state detection unit can detect a drop event, and when the fuse is fused but fails to fall normally, the state monitoring terminal can be found through data collected by the current collection unit;
5. the first processor has two working modes of a dormant state and an awakening state, so that the electric quantity is saved;
6. the accuracy of fuse state judgment is improved through three detection modes, namely switch detection, angle detection and current detection;
7. the clock chip regularly awakens the first processor to carry out active detection on the fuse, so that the situation that the fuse cannot be detected to fall due to abnormity of the switch detection unit is avoided, and whether the switch detection unit, the angle detection unit and the current sampling are abnormal or not is judged by comparing results of switch detection, angle detection and current detection during active detection.
Drawings
Fig. 1 is a schematic structural diagram of a drop switch monitoring device according to an embodiment of the invention;
FIG. 2 is a functional block diagram of a condition monitoring terminal according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a first switch chip according to an embodiment of the invention;
fig. 4 is a schematic structural diagram of a second switch chip according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of an exemplary embodiment of a power feedback circuit;
FIG. 6 is a schematic diagram of a current sampling circuit according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of an angle detection unit according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a switch detection unit according to an embodiment of the present invention;
FIG. 9 is a schematic structural diagram of a clock chip according to an embodiment of the present invention;
FIG. 10 is a block diagram of a first processor according to an embodiment of the invention;
fig. 11 is a schematic structural diagram of a first charging circuit according to an embodiment of the invention;
FIG. 12 is a functional block diagram of a convergence gateway of an embodiment of the invention;
fig. 13 is a schematic structural diagram of a third switch chip according to an embodiment of the invention;
FIG. 14 is a block diagram of a second processor according to an embodiment of the invention;
FIG. 15 is a schematic diagram of a voltage feedback circuit according to an embodiment of the present invention;
FIG. 16 is a schematic diagram of a charging circuit according to an embodiment of the present invention;
FIG. 17 is a schematic diagram of a voltage regulator circuit according to an embodiment of the present invention.
Detailed Description
The present invention will be further illustrated with reference to the accompanying drawings and specific examples, which are carried out on the premise of the technical solution of the present invention, and it should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a drop switch monitoring device, which includes three monitoring terminals 101 and a collecting gateway 102, where the three monitoring terminals 101 are respectively disposed on A, B, C three-phase corresponding drop fuses 103, each monitoring terminal 101 is configured to collect a position state and a current signal of one phase of drop fuse 103, the three monitoring terminals 101 are respectively wirelessly connected to the collecting gateway 102, the collected position state and current signal of the three-phase drop-out fuse 103 are sent to the collection gateway 102, and the collection gateway 102 is used for judging the working state of the three-phase drop-out fuse 103 according to the position state and current signal of the three-phase drop-out fuse 103, specifically, when the position state of the three-phase drop-out fuse 103 is detected to be in a closed position and the current of the three-phase drop-out fuse 103 is not zero, the working state of the drop-out fuse 103 is a normal working state; when the position state of the drop-out fuse 103 is detected to be at a drop-out position and the current of the drop-out fuse 103 is zero, the working state of the drop-out fuse is a fusing drop; when the position state of the three-phase drop-out fuse 103 is detected to be in the closed position and the current of the drop-out fuse 103 is zero, the working state of the drop-out fuse is a suspected fusing non-drop state, the collecting gateway 102 sends out the position state, the current signal and the working state of the three-phase drop-out fuse 103, and the position state, the current signal and the working state of the three-phase drop-out fuse 103 can be uploaded and stored in a background server to serve as historical data of fault analysis. When the working state of the three-phase drop-out fuse 103 is a fused drop-out state or a suspected fused non-drop-out state, a maintainer can be reminded or notified to process a fault as soon as possible.
As shown in fig. 2 to 11, the shape monitoring terminal 101 of the embodiment of the present invention includes a housing fixed to the outside of the fuse, and the housing is preferably a waterproof insulating housing. The state detection unit 1, the first processor D4, the first wireless communication module 2, the first power module 3, the current transformer 4 and the like are arranged in the shell, wherein the first processor D4 preferably adopts a single chip microcomputer, the state detection unit 1 is connected with the first processor D4 and used for detecting the position state of the drop-out fuse 103 and sending the detected position state of the drop-out fuse 103 to the first processor D4 through an electric signal, and the current transformer 4 is arranged in the shell in a sleeved mode on the periphery of the drop-out fuse 103 and can further collect current signals passing through the drop-out fuse 103.
The current transformer 4 and the first processor D4 are respectively connected to the first switch chip D2, and the first power module 3 includes a charging circuit 5 and a first rechargeable battery 6. The charging circuit 5 is connected with the first charging battery 6, the charging circuit 5 comprises a bridge rectifier circuit consisting of a diode VD1, a diode VD2, a diode VD3 and a diode VD4, the bridge rectifier circuit is connected with a charging chip D7 and the like, and the first switch chip D2 is respectively connected with the current sampling circuit 7 and the charging circuit 5. Only when current sampling is needed, the first processor D4 controls the first switch chip D2 to switch on the current transformer 4 with the current sampling circuit 7, otherwise, the first processor D4 controls the first switch chip D2 to switch on the current transformer 4 with the charging circuit 5 to charge the first rechargeable battery 6. The first processor D4 is connected to the first wireless communication module 2 to control the first wireless communication module 2 to send out the collected position state information and current data of the drop-out fuse 103.
In a time period with less electricity, when the current passing through the fuse is small, the current obtained by the current transformer 4 may not be enough to meet the charging requirement, and at this time, the first rechargeable battery 6 may have electric quantity loss and cannot normally supply power to the terminal, so the first power module of the embodiment of the present invention further includes a backup battery 8, the first rechargeable battery 6 and the backup battery 8 are respectively connected to the second switch chip D3, and the second switch chip D3 obtains the working voltage from the backup battery 8, thereby ensuring that the battery switching operation is normally performed. An electric quantity feedback circuit 9 is connected between the first processor D4 and the first rechargeable battery 6 to collect and monitor the electric quantity of the first rechargeable battery 6. When the charge of the first rechargeable battery 4 is higher than the set threshold, the first processor D4 controls the first rechargeable battery 6 to supply power to the terminal through the second switch chip D3, and when the charge of the first rechargeable battery 4 is lower than the set threshold, the first processor D4 controls the backup battery 8 to supply power to the terminal through the second switch chip D3. In order to adapt to various temperature environments, the standby battery 8 can adopt a high-low voltage battery, preferably a high-low temperature battery with the voltage of 3.6V and the capacity of more than or equal to 1200mAh, and can directly supply power to the terminal without arranging a voltage reduction circuit.
The state detection unit 1 of the embodiment of the present invention includes a switch detection unit 11 connected to the first processor D4. In order to save the power of the first rechargeable battery 6 and the backup battery 8, the first processor D4 preferably has two operation modes, i.e., a sleep state and an awake state, and when the drop-out fuse 103 is not detected by the switch detection unit 11, the first processor D4 operates in the sleep state, thereby reducing the power consumption. The switch detection unit 11 wakes up the first processor D4 when detecting that the drop-out fuse 103 drops off, the first processor D4 is further connected with the clock chip D5, the clock chip 5 is further connected with the backup battery 8 so as to directly obtain the working voltage from the backup battery 8, and the clock chip D5 is not powered off during power switching. The clock chip D5 wakes up the first processor D4 at a set time interval, the state detection unit 1 further includes an angle detection unit 12, and the first processor D4 controls the angle detection unit 12 and the first switch chip D2 to work in the awake state to measure the angle and the current of the drop-out fuse 103 and control the first wireless communication module 2 to send the position state information and the current data of the drop-out fuse 103. The first processor D4 sends the position state information of the drop-out fuse 103 and then enters the sleep state again until the switch detection unit 11 or the clock chip D5 wakes up the same again.
The current sampling circuit 6 of the embodiment of the invention comprises a resistor R15 and a resistor R16, wherein one ends of the resistor R15 and the resistor R16 are respectively connected with two ends of the current transformer 5, a resistor R18 is connected between the other ends of the resistor R15 and the resistor R16, the other end of the resistor R15 is connected with one end of the resistor R21, and the other ends of the resistor R21 and the resistor R16 are respectively connected with the first processor D4. In order to improve the stability of the signal supplied to the first processor D4, a capacitor C27 is connected in parallel to the resistor R18, and a capacitor C29 is connected between the resistor R21 and the other end of the resistor R16.
The switch detection unit of the embodiment of the invention comprises a position switch Q4, and the position detection switch Q4 can adopt a mercury switch or a ball switch. One end of the position switch Q4 is connected to the positive electrode of the first power module 3 through a resistor R46, and the other end thereof is connected to the first processor D4. When the drop-out fuse 103 is blown down, the position switch Q4 is closed from the open state, thereby providing a high signal to the first processor D4.
The angle detection unit 12 of the embodiment of the present invention includes an angle sensor D1 connected to the first processor D4, and a power control circuit connected between the angle sensor D1 and the first processor D4. Specifically, the power control circuit comprises a triode VT1, an emitter of the triode VT1 is connected with the first processor D4 to obtain a working voltage, a base of the triode VT1 is connected with the first processor D4 through a resistor R11, and a collector of the triode VT1 is connected with the angle sensor D1 through a resistor R13 and a resistor R5 in sequence. The first processor D4 provides a low level signal to the base of the transistor VT1 in the sleep state, so that the emitter and the collector of the transistor VT1 are in the cut-off state, and the power supply of the angle sensor D1 is cut off, and the angle sensor D1 does not work. When the first processor D4 is in the wake-up state, it inputs a high level to the base of the transistor VT1, and triggers the transistor VT1 to turn on, so that the angle sensor D1 is powered on. Thereby avoiding wasting power by the angle sensor D1 when the first processor D4 is in the sleep state.
In order to improve the stability of the power supply voltage of the angle sensor D1, a capacitor C18 is connected between the angle sensor D1 and the resistor R5, the other end of the capacitor C18 is grounded, a capacitor C24 is connected between the emitter of the transistor VT1 and the ground, and a capacitor C23 is connected between the collector of the transistor VT1 and the ground.
The first wireless communication module 2 preferably used in the embodiment of the present invention is a 2.4G wireless module or a low power consumption LoRa/FSK module, but is not limited to the above three modules, and may be selected according to the needs of the customer.
As shown in fig. 12 to 17, the convergence gateway 102 according to the embodiment of the present invention includes a second wireless communication module 21, the second wireless communication module 21 is wirelessly connected to the first wireless communication module 2, the second wireless communication module 21 is connected to a second processor D15, the second processor D15 preferably employs a single chip, the second processor D15 controls the second wireless communication module 21 to receive data, such as a position state and a current signal, of the three-phase drop-out fuse 103 sent by the first wireless communication module 2, the second processor D15 further determines an operating state of the three-phase drop-out fuse 103 according to the received position state and current signal of the three-phase drop-out fuse 103, the second processor D15 is connected to a second power module 22 and a reporting communication unit 23, wherein the second power module 22 is used to supply power to the convergence gateway 102, and the second processor D15 controls the reporting communication unit 23 to determine the position state, the current signal, and the reporting communication unit 23 of the three-phase drop-out fuse 103, And sending out a current signal and an operating state.
The power module 22 of the embodiment of the invention includes a switching power supply 24, the switching power supply 24 is an AC220V input, a DC5V output, and the switching power supply 24 is connected with a second charging circuit 25 and a third switching chip D11, wherein the second charging circuit 25 includes a charging chip D12 and the like. The second charging circuit 25 and the third switching chip D11 are respectively connected with the second rechargeable battery 26, a voltage stabilizing circuit 27 is connected between the third switching chip D11 and the second processor D15, and the voltage stabilizing circuit 27 includes a voltage stabilizing chip D17 and the like. The second charging circuit 25 and the third switching chip D11 are respectively connected to the second processor D15, the third switching chip D11 is powered by the second charging battery 26 to avoid power failure during switching power supply, the third switching chip D11 is controlled by the second processor D15 to operate, when the ac power supply is normal, the second processor D15 controls the third switching chip D11 to connect the switching power supply 24 with the voltage stabilizing chip D17, so that the convergence gateway 102 is powered by the switching power supply 24 to operate, when the ac power supply is powered off or the switching power supply 24 fails, the second processor D15 controls the third switching chip D11 to connect the second charging battery 26 with the voltage stabilizing circuit 27, so that the convergence gateway 102 is powered by the second charging battery to operate. A voltage feedback circuit 29 is connected between the output end of the second charging circuit 25 and the second processor D15, and when the ac power supply returns to normal, the second processor D15 detects the voltage increase at the output end of the second charging circuit 25 through the voltage feedback circuit 29, and further controls the third switching chip D11 to switch the switching power supply 24 to be connected with the voltage stabilizing chip D17.
The second processor D15 of the embodiment of the present invention is further connected to a display unit 28, and the display unit 28 includes a plurality of LED indicators, and the operating status of the monitoring device is locally displayed through the LED indicators. Specifically, for example, a power supply indicator lamp VD3, a current collection indicator lamp VD4, a communication indicator lamp VD5, and the like may be provided. The power supply indicator VD3 is used to display the power supply state. The current acquisition indicator lamp VD4 is used for showing whether current acquisition is normal, and when the current was zero, the fault indicator lamp lighted promptly, and communication indicator lamp VD5 is used for showing whether the communication is normal.
The reporting communication unit 23 of the embodiment of the present invention may access to a local device such as a TTU in a wired manner such as RS485 or RS232, and then upload data to the server together with the local device. In the case of no local device, the position state, the current signal, the operating state, and the like of the three-phase drop-out fuse 103 can be wirelessly transmitted to the server by providing a wireless communication module such as 2G/3G/4G/NBIOT.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that other parts not specifically described are within the prior art or common general knowledge to those of ordinary skill in the art. Without departing from the principle of the invention, several improvements and modifications can be made, and these improvements and modifications should also be construed as the scope of the invention.
Claims (10)
1. A monitoring device for a drop switch is characterized by comprising three monitoring terminals (101) and a convergence gateway (102), the three shape monitoring terminals (101) are respectively arranged on the three-phase corresponding drop-out fuses (103), each shape monitoring terminal (101) is used for collecting the position state and the current signal of one phase of the drop-out fuse (103), the three state monitoring terminals (101) are respectively connected with the convergence gateway (102) in a wireless way, to send the collected position state and current signals of the three-phase drop-out fuse (103) to the collection gateway (102), the collection gateway (102) is used for judging the working state of the three-phase drop-out fuse (103) according to the position state and the current signal of the three-phase drop-out fuse (103), and the position state, the current signal and the working state of the three-phase drop-out fuse (103) are sent out.
2. The drop switch monitoring device according to claim 1, comprising a housing fixed outside the fuse, wherein a state detection unit (1), a first processor (D4), a first wireless communication module (2), a first power module (3) and a current transformer (4) are arranged in the housing, the state detection unit (1) is connected with the first processor (D4) for detecting the position state of the drop fuse (103), the current transformer (4) and the first processor (D4) are respectively connected with the first switch chip (D2), the first power module (3) comprises a charging circuit (5) and a first rechargeable battery (6) connected with the charging circuit (5), the first switch chip (D2) is respectively connected with the current sampling circuit (7) and the charging circuit (5), and the first processor (D4) controls the current transformer (4) and the current sampling circuit (D2) through the first switch chip (D2) 7) Or the charging circuit (6) is switched on to perform current sampling or charge the first rechargeable battery, and the first processor (D4) is connected with the first wireless communication module (2) to control the first wireless communication module (2) to send out the collected position state information and current data of the drop-out fuse (103).
3. The drop switch monitoring device according to claim 2, wherein the first power supply module further comprises a backup battery (8), the first rechargeable battery (6) and the spare battery (8) are respectively connected with a second switch chip (D3), the second switch chip (D3) obtains the working voltage from the standby battery (8), an electric quantity feedback circuit (9) is connected between the first processor (D4) and the first rechargeable battery (6), when the charge of the first rechargeable battery (4) is higher than a set threshold, the first processor (D4) controls the first rechargeable battery (6) to supply power to the terminal through a second switch chip (D3), when the electric quantity of the first rechargeable battery (4) is lower than a set threshold value, the first processor (D4) controls the standby battery (8) to supply power to the terminal through the second switch chip (D3).
4. The drop switch monitoring device according to claim 2, wherein the state detection unit (1) comprises a switch detection unit (11) connected with a first processor (D4), the first processor (D4) operates in a sleep state when the switch detection unit (11) does not detect that the drop fuse (103) drops, the switch detection unit (11) wakes up the first processor (D4) when detecting that the drop fuse (103) drops, the first processor (D4) and the backup battery (8) are further connected with a clock chip (D5), the clock chip (D5) wakes up the first processor (D4) at set time intervals, the state detection unit (1) comprises an angle detection unit (12), the first processor (D4) controls the angle detection unit (12) and the first switch chip (D2) to operate in the wake-up state, and the first wireless communication module (2) is controlled to send out position state information and current data of the drop-out fuse (103).
5. The drop switch monitoring device according to claim 2, wherein the current sampling circuit (6) comprises a resistor (R15) and a resistor (R16), one end of the resistor (R15) and one end of the resistor (R16) are respectively connected with two ends of the current transformer (5), a resistor (R18) is connected between the other ends of the resistors, the other end of the resistor (R15) is connected with one end of a resistor (R21), the other ends of the resistor (R21) and the resistor (R16) are respectively connected with the first processor (D4), the resistor (R18) is connected with a capacitor (C27) in parallel, and a capacitor (C29) is connected between the other ends of the resistor (R21) and the resistor (R16).
6. The drop switch monitoring device according to claim 4, wherein the switch detection unit comprises a position switch (Q4), one end of the position switch (Q4) being connected to the positive pole of the first power module (3) via a resistor (R46) and the other end thereof being connected to the first processor (D4), the position detection switch (Q4) comprising a mercury switch or a ball switch.
7. The fall switch monitoring device according to claim 4, wherein the angle detection unit (12) comprises an angle sensor (D1) connected to the first processor (D4) and a power control circuit connected between the angle sensor (D1) and the first processor (D4), the power control circuit comprises a transistor (VT1) having an emitter connected to the first processor (D4), a base of the transistor (VT1) is connected to the first processor (D4) through a resistor (R11), a collector of the transistor (VT1) is connected to the angle sensor (D1) through a resistor (R13) and a resistor (R5) in sequence, one end of a capacitor (C18) is connected between the angle sensor (D1) and the resistor (R5), the other end of the capacitor (C18) is grounded, and a capacitor (C24) is connected between the emitter of the transistor (VT1) and ground, and a capacitor (C23) is connected between the collector of the capacitor and the ground.
8. The fall switch monitoring device according to claim 2, wherein the convergence gateway (102) comprises a second wireless communication module (21) wirelessly connected to the first wireless communication module (2), the second wireless communication module (21) being connected to a second processor (D15), the second processor (D15) being connected to a power supply module (22) and a reporting communication unit (23).
9. The drop switch monitoring device according to claim 8, wherein the power supply module (22) comprises a switching power supply (24), the switch power supply (24) is connected with a second charging circuit (25) and a third switch chip (D11), the second charging circuit (25) and the third switching chip (D11) are respectively connected with a second charging battery (26), a voltage stabilizing circuit (27) is connected between the third switch chip (D11) and the second processor (D15), the second charging circuit (25) and the third switching chip (D11) are respectively connected with the second processor (D15), the third switch chip (D11) is powered by a second rechargeable battery (26), and which is controlled by a second processor (D15) to effect the supply of the switching power supply (24) or a second rechargeable battery (26) to the convergence gateway (102), and a voltage feedback circuit (29) is connected between the output end of the second charging circuit (25) and the second processor (D15).
10. The fall switch monitoring device according to claim 8, wherein a display unit (28) is further connected to the second processor (D15), the display unit (28) comprising a number of LED indicator lights.
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| CN201911395352.0A CN111077443A (en) | 2019-12-30 | 2019-12-30 | Drop switch monitoring device |
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| CN201911395352.0A CN111077443A (en) | 2019-12-30 | 2019-12-30 | Drop switch monitoring device |
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Application publication date: 20200428 |