CN220603582U - Self-checking circuit and lane all-in-one - Google Patents

Self-checking circuit and lane all-in-one Download PDF

Info

Publication number
CN220603582U
CN220603582U CN202322250159.6U CN202322250159U CN220603582U CN 220603582 U CN220603582 U CN 220603582U CN 202322250159 U CN202322250159 U CN 202322250159U CN 220603582 U CN220603582 U CN 220603582U
Authority
CN
China
Prior art keywords
controller
type
peripheral
self
resistor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202322250159.6U
Other languages
Chinese (zh)
Inventor
蔡福春
吴文佳
刘宇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Genvict Technology Co Ltd
Original Assignee
Shenzhen Genvict Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Genvict Technology Co Ltd filed Critical Shenzhen Genvict Technology Co Ltd
Priority to CN202322250159.6U priority Critical patent/CN220603582U/en
Application granted granted Critical
Publication of CN220603582U publication Critical patent/CN220603582U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

Landscapes

  • Control Of Electric Motors In General (AREA)

Abstract

The utility model discloses a self-checking circuit and a lane all-in-one machine, wherein the lane all-in-one machine comprises a controller, a first type peripheral, a second type peripheral and a third type peripheral, and the self-checking circuit comprises a communication unit connected between the controller and the first type peripheral, a state feedback unit connected between the controller and the second type peripheral and a load monitoring unit connected between the third type peripheral and the controller. The utility model can help maintenance personnel monitor the peripheral running state in the lane all-in-one machine, and has positive effects on reducing the time required by peripheral maintenance, reducing equipment faults, improving the lane passing efficiency, reducing traffic jam, protecting the environment and the like.

Description

Self-checking circuit and lane all-in-one
Technical Field
The utility model relates to the technical field of lane integrated machines, in particular to a self-checking circuit and a lane integrated machine.
Background
At present, most of the old lane integrated machines in the market are installed in a scattered mode, a lane server and equipment are converted into on-off control signals of the equipment according to related protocols, and the equipment can be controlled normally, but the scheme not only lacks of effective monitoring on peripheral equipment, but also cannot feed back equipment operation conditions in time, so that abnormal conditions cannot be dealt with in time, the smoothness of vehicle traffic is possibly affected, and even the occurrence of vehicle blocking and the like is caused.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a self-checking circuit and a lane integrated machine.
The technical scheme adopted for solving the technical problems is as follows: a self-checking circuit is constructed for lane all-in-one, lane all-in-one includes controller, first class peripheral hardware, second class peripheral hardware and third class peripheral hardware, self-checking circuit includes:
the communication unit is connected between the controller and the first type of peripheral equipment and is used for feeding back first state information output by the first type of peripheral equipment to the controller;
the state feedback unit is connected between the controller and the second type peripheral and used for converting the second state information output by the second type peripheral and feeding back the second state information to the controller; and
and the load monitoring unit is connected between the third type of peripheral equipment and the controller and is used for outputting a third state signal according to the power supply change of the third type of peripheral equipment.
Preferably, the self-checking circuit further comprises a server communication unit connected with the controller and used for feeding back the first state information, the second state information and the third state signal to the lane server.
Preferably, the self-checking circuit further comprises an alarm unit connected with the controller and used for outputting alarm signals when the first type peripheral, the second type peripheral and the third type peripheral are abnormal.
Preferably, the self-checking circuit further comprises a status code display unit for displaying status codes according to status code instructions output by the controller, and the status code display unit is connected with the controller.
Preferably, the communication unit is an RS-232 communication module or an RS-485 communication module.
Preferably, the load monitoring unit includes:
the current acquisition module is connected with the power supply loop of the third type of peripheral equipment and used for acquiring working current of the third type of peripheral equipment;
the current detection module is connected with the controller and the current acquisition module and is used for amplifying the working current and transmitting the amplified working current to the controller; and
and the power supply protection module is connected with the power supply loop of the third-class peripheral and the controller and is used for disconnecting the power supply loop of the third-class peripheral when the working current is abnormal.
Preferably, the current acquisition module comprises a sampling resistor R36; the current detection module comprises a current detection chip U5;
the first end and the second end of the sampling resistor R36 are connected in series on the power supply circuit of the third type of peripheral equipment, the first end of the sampling resistor R36 is connected with the negative input end of the current detection chip U5, and the second end of the sampling resistor R36 is connected with the positive input end of the current detection chip U5;
the output end of the current detection chip U5 is connected with the controller.
Preferably, the power supply protection module comprises a relay K19;
the first contact and the second contact of the relay K19 are connected in series on the power supply circuit of the third type of peripheral equipment, the first end of the exciting coil of the relay K19 is connected with a first direct-current voltage, and the second end of the exciting coil of the relay K19 is connected with the controller.
Preferably, the state feedback unit includes a fifth resistor R106, a sixth resistor R105, a second diode D22, an optocoupler U13A, and a seventh resistor R93;
the first end of the state feedback interface of the second type of peripheral is connected to the second end of the state feedback interface through the fifth resistor R106, the sixth resistor R105 and the anode and cathode of the second diode D22, the light emitting diode cathode of the optocoupler U13A is connected to the first end of the fifth resistor R106, the light emitting diode anode of the optocoupler U13A is connected to the second end of the fifth resistor R106, the collector of the optocoupler U13A is connected to the controller and is connected to the second direct voltage through the seventh resistor R93, and the emitter of the optocoupler U13A is grounded.
The utility model also constructs a lane all-in-one machine which comprises the self-checking circuit.
The utility model has the following beneficial effects: providing a self-checking circuit; establishing a communication channel with the first type of peripheral equipment through the communication unit so that the first type of peripheral equipment feeds back the output first state information to the controller; the state feedback unit is used for converting the second state information output by the second type of peripheral equipment so that the controller can normally read the second state information; the load monitoring unit outputs a third state signal according to the power supply change of the third type of peripheral equipment, so that the controller can monitor whether the power supply of the controller is abnormal or not directly through the third state signal so as to take corresponding measures; the utility model can help maintenance personnel monitor the peripheral running state in the lane all-in-one machine, and has positive effects on reducing the time required by peripheral maintenance, reducing equipment faults, improving the lane passing efficiency, reducing traffic jam, protecting the environment and the like.
Drawings
The utility model will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic block diagram of a self-test circuit in some embodiments of the utility model;
FIG. 2 is a circuit diagram of a state feedback unit in some embodiments of the utility model;
fig. 3 is a circuit diagram of a load monitoring unit in some embodiments of the utility model.
Detailed Description
For a clearer understanding of technical features, objects and effects of the present utility model, a detailed description of embodiments of the present utility model will be made with reference to the accompanying drawings.
In the following description, it should be understood that the directions or positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "longitudinal", "transverse", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are configured and operated in specific directions based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model, and do not indicate that the apparatus or element to be referred to must have specific directions, and thus should not be construed as limiting the present utility model.
Fig. 1 is a schematic block circuit diagram of a self-test circuit in some embodiments of the present utility model, which is suitable for a lane all-in-one machine, including a controller 1, a first type peripheral, a second type peripheral, and a third type peripheral. In addition, the first type of peripheral equipment mainly comprises peripheral equipment which is provided with common communication interfaces (such as an RS-232 communication module, an RS-485 communication module and the like), such as a railing machine (the communication interfaces are mainly used for configuring parameters of the railing machine and feeding back configuration states, abnormal states and the like), a fee display screen, a voice module, a car detector and the like; the second type of peripheral mainly comprises peripheral equipment capable of feeding back signals in a high-voltage signal form (the voltage value of the high-voltage signal is far higher than the working voltage of the controller 1, so that the existing controller 1 cannot directly read some states of the second type of peripheral equipment), such as a motor in a railing machine (by outputting states of high-low level feedback motors, including whether lifting a rod, falling a rod is in place or not) and the like; the third type of peripheral equipment mainly comprises peripheral equipment except the first type of peripheral equipment and the second type of peripheral equipment in the lane all-in-one machine, namely the existing controller 1 is only the peripheral equipment for controlling the on-off of the controller, such as fog lamps, cooling fans in all-in-one machines, alarm lamps, running lamps and the like. As shown in fig. 1, the self-checking circuit comprises a communication unit 2 for feeding back first state information output by a first type of peripheral to a controller 1, a state feedback unit 3 for feeding back second state information output by a second type of peripheral to the controller 1 after conversion, and a load monitoring unit 4 for outputting a third state signal according to power supply change of a third type of peripheral.
Specifically, the communication unit 2 is connected between the controller 1 and the first type of peripheral, the status feedback unit 3 is connected between the controller 1 and the second type of peripheral, and the load monitoring unit 4 is connected between the third type of peripheral and the controller 1.
In this embodiment, a communication channel is established with the first type peripheral through the communication unit 2, so that the first type peripheral feeds back the output first state information thereof to the controller 1; the state feedback unit 3 is used for converting (reducing) the second state information output by the second type of peripheral equipment so that the controller 1 can normally read the second state information; the load monitoring unit 4 outputs a third state signal according to the power supply change of the third type of peripheral equipment, so that the controller 1 can monitor whether the power supply of the third type of peripheral equipment is abnormal or not through the third state signal, and corresponding measures can be taken.
It should be noted that, in order to be able to monitor a plurality of devices at the same time, the number of the communication unit 2, the status feedback unit 3, and the load monitoring unit in the self-checking circuit may be several.
In some embodiments, the communication unit 2 may be a communication module such as an RS-232 communication module or an RS-485 communication module.
In some embodiments, as shown in fig. 2, the status feedback unit 3 includes a fifth resistor R106, a sixth resistor R105, a second diode D22, an optocoupler U13A, and a seventh resistor R93.
Specifically, a first end of a state feedback interface of the second type of peripheral is connected to a second end of the state feedback interface through a fifth resistor R106, a sixth resistor R105, an anode and a cathode of a second diode D22, a light emitting diode cathode of an optocoupler U13A is connected to the first end of the fifth resistor R106, a light emitting diode anode of the optocoupler U13A is connected to the second end of the fifth resistor R106, a collector of the optocoupler U13A is connected to the controller 1, and is connected to a second direct voltage through a seventh resistor R93, and an emitter of the optocoupler U13A is grounded.
It should be noted that, in this embodiment, the state feedback interface refers to an interface that the second type of peripheral outputs a high voltage signal that may reflect some states of the second type of peripheral. Taking fig. 2 as an example, the network reference number motorjcom_1 is correspondingly connected to the negative end of the power supply source of the Motor, while the network reference number motorjfall_state_1 is connected to the falling pole feedback signal end of the Motor, when the Motor falls in place, the Motor will set motorjfall_state_1 to a high level (the voltage of the high level can reach 24V), the motorjfall_state_1 and motorjfall_state_1 form a voltage difference, the second diode D22 is turned on, the light emitting diode of the optocoupler U13A emits light due to the voltage difference formed at the two ends of the sixth resistor R105, the collector and the emitter of the optocoupler U13A are turned on, the collector of the optocoupler U13A is set to a low level, the controller 1 detects the low level, and the low level can indicate that the railing machine has fallen in place; conversely, when the Motor drop rod is not in place, the Motor will set motor_fall_state_1 to a low level, so that the second diode D22 is turned off, the collector and emitter of the optocoupler U13A are not conductive, and under the pull-up action of the seventh resistor R93, the collector of the optocoupler U13A is set to a high level, and the high level may indicate that the railing drop rod is not in place. It will be readily appreciated that in this embodiment, the network reference numerals motor_fall_state_1 and motor_com_1 are correspondingly connected to a status feedback interface (interface not shown) for feeding back whether the drop bar is in place or not by the Motor in a railing machine.
In some embodiments, as shown in fig. 3, the load monitoring unit 4 includes a current collection module 41 for collecting the working current of the third type of peripheral, a current detection module 42 for amplifying the working current and transmitting the amplified working current to the controller 1, and a power supply protection module 43 for disconnecting the power supply loop of the third type of peripheral when the working current is abnormal.
Specifically, the current collecting module 41 is connected to the power supply circuit of the third type of peripheral, the current detecting module 42 is connected to the current collecting module 41 of the controller 1 to transmit the amplified working current to the controller 1, and the power supply protecting module 43 is connected to the power supply circuit of the third type of peripheral and the controller 1 to disconnect the power supply circuit of the third type of peripheral by the controller 1 through the power supply protecting module 43 when the working current is abnormal.
Further, as shown in fig. 3, the current acquisition module 41 includes a sampling resistor R36; the current detection module 42 includes a current detection chip U5, a second resistor R37, and a third resistor R38. Optionally, the current detection chip U5 is IN214.
Specifically, the first end and the second end of the sampling resistor R36 are connected in series on the power supply loop of the third type of peripheral (connected in series with the power supply loop of the third type of peripheral through the network labels ledaiit_out_c and ledaiit_out_b), the first end of the sampling resistor R36 is connected to the negative input end of the current detection chip U5, and the second end of the sampling resistor R36 is connected to the positive input end of the current detection chip U5. One path of the output end of the current detection chip U5 is connected to the ground through a second resistor R37, and the other path of the output end of the current detection chip U5 is connected to the controller 1 through a third resistor R38.
In this embodiment, since the sampling resistor R36 is connected in series to the power supply loop of the third type of peripheral device, the voltage values of the first end and the second end of the sampling resistor R36 can reflect the transmission current value of the power supply loop (i.e. the working current of the third type of peripheral device), but the voltage value is generally smaller, if the AD detection resolution of the controller 1 is not high enough, the working current is directly calculated through the voltage value, and the accuracy is lower, so that the voltage value is amplified through the current detection chip U5, which is beneficial to improving the calculation accuracy of the working current. In addition, the sampling resistor R36 may be composed of a plurality of resistors in series-parallel connection.
In some embodiments, as shown in fig. 3, the power protection module 43 includes a relay K19.
Specifically, the first contact and the second contact of the relay K19 are connected in series on a power supply circuit of a third type of peripheral equipment, the first end of the exciting coil of the relay K19 is connected with the first direct current voltage, and the second end of the exciting coil of the relay K19 is connected with the controller 1.
In this embodiment, when no abnormality of the working current of the third type peripheral device is found, the controller 1 may output a low level to the second end of the exciting coil of the relay K19, so that the exciting coil is excited, and the first contact and the second contact of the relay K19 are closed, so that the third type peripheral device may normally acquire and work a power supply; when the working current of the third type peripheral is found to be abnormal, the controller 1 can output a high level to the second end of the exciting coil of the relay K19, so that the relay K19 is in demagnetizing state, the first contact and the second contact of the relay K19 are opened, the third type peripheral is further in power losing state, and the third type peripheral is protected from being damaged due to overcurrent.
In some embodiments, as shown in fig. 3, the power protection module 43 further includes a first diode D104, a fourth resistor R3, and a first light emitting diode D103.
Specifically, the cathode of the first diode D104 and the first end of the fourth resistor R3 are connected to the first end of the exciting coil of the relay K19, the second end of the fourth resistor R3 is connected to the anode of the first light emitting diode D103, and the cathode of the first light emitting diode D103 and the anode of the first diode D104 are connected to the second end of the exciting coil of the relay K19.
In the present embodiment, the first diode D104 is a freewheeling diode of the exciting coil of the relay K19, which can prevent the exciting coil from being damaged due to excessively high reverse potential when the exciting coil is demagnetized. The fourth resistor R3 and the first light emitting diode D103 form an indication circuit, and the first light emitting diode D103 may be turned on when the controller 1 outputs a low level to the second end of the exciting coil, thereby indicating that the instruction output by the controller 1 is in place.
In order to enable the lane server to know the status of each peripheral in time, in some embodiments, as shown in fig. 1, the self-checking circuit further comprises a server communication unit 5 for feeding back the first status information, the second status information, and the third status signal to the lane server. The server communication unit 5 is connected to the controller 1 to acquire the first state information, the second state information, and the third state signal.
Further, the server communication unit 5 may be an RS-485 communication module, a CAN communication module, or the like.
In order to be able to prompt the intervention of maintenance personnel in time when an abnormality occurs in the peripheral, in some embodiments, as shown in fig. 1, the self-checking circuit further comprises an alarm unit 6 for outputting an alarm signal when the first type peripheral, the second type peripheral and the third type peripheral are abnormal. The alarm unit 6 is connected to the controller 1 to receive a corresponding alarm instruction.
Alternatively, the alarm unit 6 is an audible and visual alarm.
In some embodiments, as shown in fig. 1, the self-checking circuit further includes a status code display unit 7 for displaying a status code according to a status code instruction output by the controller 1, where the status code display unit 7 is connected to the controller 1. The status code display unit 7 is mainly used for further improving the prompt effect, so that maintenance personnel cannot intervene in time due to abnormal prompt functions.
Optionally, the status code display unit 7 is a digital tube, and further directly reflects whether the self-checking circuit has found an abnormality through digital encoding.
The utility model also provides a lane all-in-one machine, which comprises the self-checking circuit provided by the embodiment of the utility model.
The utility model has the following beneficial effects: providing a self-checking circuit; establishing a communication channel with the first type of peripheral equipment through the communication unit so that the first type of peripheral equipment feeds back the output first state information to the controller; the state feedback unit is used for converting the second state information output by the second type of peripheral equipment so that the controller can normally read the second state information; the load monitoring unit outputs a third state signal according to the power supply change of the third type of peripheral equipment, so that the controller can monitor whether the power supply of the controller is abnormal or not directly through the third state signal so as to take corresponding measures; the utility model can help maintenance personnel monitor the peripheral running state in the lane all-in-one machine, and has positive effects on reducing the time required by peripheral maintenance, reducing equipment faults, improving the lane passing efficiency, reducing traffic jam, protecting the environment and the like.
It is to be understood that the above examples only represent preferred embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the utility model; it should be noted that, for a person skilled in the art, the above technical features can be freely combined, and several variations and modifications can be made without departing from the scope of the utility model; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims (10)

1. The utility model provides a self-checking circuit for lane all-in-one, lane all-in-one includes controller (1), first class peripheral hardware, second class peripheral hardware and third class peripheral hardware, its characterized in that, self-checking circuit includes:
the communication unit (2) is connected between the controller (1) and the first type of peripheral equipment and is used for feeding back first state information output by the first type of peripheral equipment to the controller (1);
the state feedback unit (3) is connected between the controller (1) and the second type of peripheral equipment and is used for converting second state information output by the second type of peripheral equipment and feeding the second state information back to the controller (1); and
and the load monitoring unit (4) is connected between the third type of peripheral equipment and the controller (1) and is used for outputting a third state signal according to the power supply change of the third type of peripheral equipment.
2. The self-test circuit according to claim 1, further comprising a server communication unit (5) connected to the controller (1) for feeding back the first, second and third status signals to a lane server.
3. Self-test circuit according to claim 1, further comprising an alarm unit (6) connected to the controller (1) for outputting an alarm signal when the first, second and third type of peripherals are abnormal.
4. Self-test circuit according to claim 1, further comprising a status code display unit (7) for displaying a status code according to a status code instruction output by the controller (1), the status code display unit (7) being connected to the controller (1).
5. Self-test circuit according to claim 1, characterized in that the communication unit (2) is an RS-232 communication module or an RS-485 communication module.
6. Self-test circuit according to claim 1, characterized in that the load monitoring unit (4) comprises:
the current acquisition module (41) is connected with the power supply loop of the third type of peripheral equipment and is used for acquiring working current of the third type of peripheral equipment;
the current detection module (42) is connected with the controller (1) and the current acquisition module (41) and is used for amplifying the working current and transmitting the amplified working current to the controller (1); and
and the power supply protection module (43) is connected with the power supply loop of the third-class peripheral and the controller (1) and is used for disconnecting the power supply loop of the third-class peripheral when the working current is abnormal.
7. The self-test circuit according to claim 6, characterized in that the current acquisition module (41) comprises a sampling resistor R36; the current detection module (42) comprises a current detection chip U5;
the first end and the second end of the sampling resistor R36 are connected in series on the power supply circuit of the third type of peripheral equipment, the first end of the sampling resistor R36 is connected with the negative input end of the current detection chip U5, and the second end of the sampling resistor R36 is connected with the positive input end of the current detection chip U5;
the output end of the current detection chip U5 is connected with the controller (1).
8. The self-test circuit according to claim 6, characterized in that the power supply protection module (43) comprises a relay K19;
the first contact and the second contact of the relay K19 are connected in series on the power supply circuit of the third type of peripheral equipment, the first end of the exciting coil of the relay K19 is connected with a first direct-current voltage, and the second end of the exciting coil of the relay K19 is connected with the controller (1).
9. The self-test circuit according to any one of claims 1 to 8, wherein the state feedback unit (3) comprises a fifth resistor R106, a sixth resistor R105, a second diode D22, an optocoupler U13A and a seventh resistor R93;
the first end of the state feedback interface of the second type of peripheral is connected to the second end of the state feedback interface through the fifth resistor R106, the sixth resistor R105 and the anode and cathode of the second diode D22, the light emitting diode cathode of the optocoupler U13A is connected to the first end of the fifth resistor R106, the light emitting diode anode of the optocoupler U13A is connected to the second end of the fifth resistor R106, the collector of the optocoupler U13A is connected to the controller (1), and is connected to the second direct voltage through the seventh resistor R93, and the emitter of the optocoupler U13A is grounded.
10. A lane all-in-one machine comprising a self-test circuit as claimed in any one of claims 1 to 9.
CN202322250159.6U 2023-08-18 2023-08-18 Self-checking circuit and lane all-in-one Active CN220603582U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202322250159.6U CN220603582U (en) 2023-08-18 2023-08-18 Self-checking circuit and lane all-in-one

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202322250159.6U CN220603582U (en) 2023-08-18 2023-08-18 Self-checking circuit and lane all-in-one

Publications (1)

Publication Number Publication Date
CN220603582U true CN220603582U (en) 2024-03-15

Family

ID=90177834

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202322250159.6U Active CN220603582U (en) 2023-08-18 2023-08-18 Self-checking circuit and lane all-in-one

Country Status (1)

Country Link
CN (1) CN220603582U (en)

Similar Documents

Publication Publication Date Title
US8067946B2 (en) Method for repairing a transmission line in an electrical power distribution system
EP0301528A1 (en) Monitoring and warning system for series fed runway visual aids
CN106443362A (en) Power distribution network fault detection system
CN220603582U (en) Self-checking circuit and lane all-in-one
CN210222143U (en) High-voltage lightning arrester monitoring device
CN212905381U (en) Live wire zero line ground wire of alternating-current charging stake connects wrong detection circuitry
JP6140527B2 (en) String monitor system for photovoltaic power generation
CN112615432A (en) Power distribution low-voltage equipment monitoring system
CN115792708B (en) SPD online aging monitoring system and method
CN104359591A (en) High-voltage cable coupling box temperature detection device
CN207664228U (en) A kind of antenna lodging control device based on CAN bus
CN218733209U (en) Residual current operated circuit breaker
CN111142059A (en) Intelligent detection device and method for PT unit of outdoor ring main unit
CN205581252U (en) Power system fault indicator
KR20100000592U (en) Device for monitoring a zero-phasecurrent of transformer
CN213935115U (en) Communication optical cable monitoring system
CN210721746U (en) Perimeter system capable of automatically correcting
KR101382253B1 (en) Power unit monitering controller system
CN206331780U (en) A kind of display intelligent checking system
CN211579578U (en) Current transformer open circuit protection device for electric quantity collection
CN220795356U (en) Automatic detection device for grounding resistance of distribution box
JPH0716275B2 (en) Device for remotely signaling the status of a device that can assume multiple individual states
CN220171217U (en) Scram line open short circuit detection circuit, remote controller and vehicle
CN113899974B (en) Fault analysis circuit, control method thereof and refrigerating unit
CN220399612U (en) Server power supply detection system

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant