State monitoring and alarming device for control switch of low-voltage contact cabinet

Abstract

The utility model belongs to the technical field of low-voltage contact cabinet monitoring devices, and discloses a low-voltage contact cabinet control switch state monitoring alarm device which comprises a relay sampling circuit and a voice alarm circuit. The relay sampling circuit comprises a relay module and a relay sampling loop power supply; one end of the relay module is connected with the contact cabinet control switch through the relay sampling loop power supply; the voice alarm circuit comprises a voice chip and a voice alarm loop power supply, the other end of the relay module is connected with the voice chip, and the relay module and the voice chip are respectively connected with the voice alarm loop power supply. According to the utility model, the relay sampling circuit is directly connected with the contact cabinet control switch, so that the current state information of the change-over switch can be obtained in real time, the accuracy and the real-time performance of the state information are ensured, and a reliable basis is provided for subsequent alarm judgment. The voice alarm circuit can remind an operator that the current state is abnormal, so that the potential safety hazard caused by manual forgetting or negligence is greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of low-voltage connection cabinet monitoring devices, and particularly relates to a monitoring and alarm device for the state of a control switch of a low-voltage connection cabinet. Background Technique

[0002] The low-voltage system of the lighting station is the core unit of the navigational lighting and the basis for the safe operation of the navigational lighting system. If there are operating failures in the low-voltage system or the low-voltage system is in an unsafe state caused by humans, the entire navigational lighting system of the lighting station will not meet the operating standards, bringing great potential safety hazards to the operation of the navigational lighting. Currently, most of the design schemes for the low-voltage system of the navigational lighting station adopt a two-incoming line, one-connection, and diesel generator system. As the center connecting the two incoming lines and the diesel generator for power supply, the connection cabinet plays a very important role.

[0003] Traditional operating procedures require a diesel generator load test to be carried out every week. After the test is completed, the transfer switch of the connection cabinet must be placed in the automatic state. The low-voltage power supply of the lighting station is designed with two mains incoming lines and one diesel generator (the generator is used as a standby emergency power supply). The low-voltage distribution system is divided into two sections of busbars, and the bus-tie is automatically switched in, and the self-switching is not restored. When both mains power supplies fail, the diesel generator starts within 15 seconds and takes on all loads. The load test is to first cut off one way, then cut off both mains power supplies, and within 15 seconds, the diesel generator automatically starts and switches to the diesel generator power supply to take on all loads. The navigational lighting maintenance personnel verify the reliability of the switching operation of the low-voltage power supply system through the load test. In the normal working state, the transfer switch of the connection cabinet is always in the "automatic" position. After the diesel generator load test is completed, during the process of restoring the mains power supply to the normal working state, the operation of the transfer switch state will switch from "automatic" to "local" and then to the "automatic" mode.

[0004] According to the notification content of a safety incident related to the failure of the navigational lighting at an airport, there were two consecutive momentary power outages of the two mains power supplies in the local municipal power grid within a short period of time. After the first momentary power outage of the mains power supply, the standby generator at the south lighting station started normally, but after the mains power supply returned to normal, the switch of the diesel generator incoming line cabinet at the south lighting station was not restored from the manual to the automatic gear position. During the second momentary power outage of the municipal power supply, the diesel generator at the south lighting station started but had no output, resulting in partial failure of the airport navigational lighting and affecting the normal approach of a flight.

[0005] Therefore, the operation procedure of placing the transfer switch of the connection cabinet in the automatic state after the load test is very important. However, in actual manual operations, it is easy to be forgotten or omitted. For this reason, the utility model provides a monitoring and alarm device for the state of the control switch of the low-voltage connection cabinet, which is used for the operation reminder of the control switch of the connection cabinet and reduces the potential safety hazards caused by human errors. Content of the Utility Model

[0006] To overcome the problems existing in the related technologies, the disclosed embodiments of the present utility model provide a monitoring and alarming device for the control switch state of a low-voltage connection cabinet.

[0007] The technical solution of the present utility model is as follows: A monitoring and alarming device for the control switch state of a low-voltage connection cabinet is provided with:

[0008] A relay sampling circuit and a voice alarming circuit;

[0009] The relay sampling circuit includes a relay module and a relay sampling loop power supply. One end of the relay module is connected to the control switch of the connection cabinet through the relay sampling loop power supply;

[0010] The voice alarming circuit includes a voice chip and a voice alarming loop power supply. The other end of the relay module is connected to the voice chip, and the relay module and the voice chip are respectively connected to the voice alarming loop power supply.

[0011] In one embodiment, the voice alarming circuit further includes a voice player, and the voice player is connected to the output end of the voice chip.

[0012] In one embodiment, the voice player uses a speaker or a power amplifier. The voice chip is connected to the speaker through a PWM audio output port, or is connected to the power amplifier through a DAC output port.

[0013] In one embodiment, the relay sampling circuit further includes a working indicator light, and the working indicator light is connected to the relay module.

[0014] Combining all the above technical solutions, the beneficial effects of the present utility model are as follows: By directly connecting the relay sampling circuit to the control switch of the low-voltage connection cabinet, the present utility model can obtain the current state information of the connection cabinet control switch in real time, ensuring the accuracy and timeliness of the state information and providing a reliable basis for subsequent alarm judgment. When it is detected that the control switch of the connection cabinet is not in the expected "automatic" state (such as not being restored to the automatic mode due to human negligence), the relay sampling circuit will trigger the voice alarming circuit. The voice alarming circuit will then issue a clear voice reminder to inform the operator that the current state is abnormal and corresponding adjustment operations are required, greatly reducing the potential safety hazards caused by human forgetting or negligence.

[0015] Through automatic monitoring and alarming, the present utility model incorporates the key links in the human operation process into the monitoring scope, effectively reducing the operation errors caused by human negligence. By ensuring that the control switch of the connection cabinet is always in the correct automatic state, it guarantees the rapid response and automatic switching of the navigation aid lighting system in case of emergencies such as sudden power outages, helps improve the reliability and stability of the entire navigation aid lighting system, and ensures the safe takeoff and landing of flights.

[0016] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the disclosure of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments in accordance with the present disclosure, and are used together with the specification to explain the principles of the present disclosure.

[0018] Figure 1 is the circuit connection diagram of the low-voltage tie cabinet control switch status monitoring and alarm device provided by the embodiment of the present utility model;

[0019] Figure 2 is the power supply system diagram provided by the embodiment of the present utility model;

[0020] Figure 3 is the circuit schematic diagram of the relay sampling circuit and the voice alarm circuit provided by the embodiment of the present utility model;

[0021] In the figure: 1. Relay module; 2. Voice chip; 3. Relay sampling circuit power supply; 4. Tie cabinet control switch; 5. Voice alarm circuit power supply. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following detailed description of the specific embodiments of the present utility model will be given with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0023] As Figure 1 shown, the low-voltage tie cabinet control switch status monitoring and alarm device provided by the embodiment of the present utility model includes a relay sampling circuit and a voice alarm circuit;

[0024] The relay sampling circuit includes a relay module 1 and a relay sampling circuit power supply 3, and one end of the relay module 1 is connected to the tie cabinet control switch 4 through the relay sampling circuit power supply 3;

[0025] The voice alarm circuit includes a voice chip 2 and a voice alarm circuit power supply 5, the other end of the relay module 1 is connected to the voice chip 2, and the relay module 1 and the voice chip 2 are respectively connected to the voice alarm circuit power supply 5.

[0026] Preferably, the voice alarm circuit in the embodiment of the present utility model further includes a voice player, and the voice player is connected to the output end of the voice chip 2.

[0027] Preferably, the voice player in the embodiment of the utility model adopts a speaker or a power amplifier, and the voice chip 2 is connected to the speaker through a PWM audio output port, or is connected to the power amplifier through a DAC output port.

[0028] The relay module 1 can adopt a low-level trigger mode relay, and the voice chip 2 adopts a low static current integrated chip, which can output PWM audio and directly drive an 8Ω / 0.5W speaker. It can also support DAC output and an external power amplifier. The corresponding storage capacity can be selected according to the voice length; the power supply voltage should be the same as the relay circuit.

[0029] like Figure 2 As shown, the relay sampling circuit power supply 3 and the voice alarm circuit power supply 5 in the embodiment of the utility model are taken from the upstream VCC power supply. The two low-voltage mains are connected to the power module through the JP1 and JP2 interfaces, and output 400V DC voltage after two-stage filtering and rectification. It is connected to the DC-DC module, and after voltage stabilization and filtering, it becomes a 5V output voltage VCC to supply the relay sampling circuit and the voice alarm circuit.

[0030] like Figure 3 As shown, it is a system diagram of the relay sampling circuit and voice alarm circuit in the embodiment of the utility model. The relay sampling circuit is used to expand the form and number of sampling nodes. For example, if the sampling part of the equipment can only take a single normally closed node, it can be expanded to provide a back-end circuit for normally open and normally closed through the relay sampling circuit. After sampling, the sampling circuit inputs the single-chip microcomputer, performs logical judgment and communication, and sends a signal to the voice alarm module. The working indicator light in the figure is an extended content.

[0031] In order to reduce the potential safety hazards caused by human error, the utility model ensures that the control switch of the contact cabinet is restored to the "automatic" position after the load is completed. As long as the conversion switch is switched to the "local" mode, an uninterrupted voice prompt will be given: the operation is completed and the switch will be restored to "automatic". The device automatically gives a voice prompt, requiring the staff to manually restore to the "automatic mode".

[0032] The normally closed node of the control switch of the contact cabinet is used as the trigger switch of the alarm device. The alarm device adopts a voice mode, and the voice mode adopts a voice chip as the core component of the prompt device.

[0033] In actual application, a working indicator light can be added to the relay circuit. By combining the status change of the working indicator light with the voice alarm, double protection is provided to increase the stability of equipment operation.

[0034] Use voice playback mode: press the trigger button to start playing, keep pressing it to play in a loop, and stop playing after the current voice is played.

[0035] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be covered within the protection scope of the present utility model.

Claims

1. A monitoring and alarming device for the control switch status of a low-voltage connection cabinet, characterized in that, The device includes a relay sampling circuit and a voice alarm circuit; The relay sampling circuit includes a relay module (1) and a relay sampling circuit power supply (3). One end of the relay module (1) is connected to the control switch (4) of the connection cabinet through the relay sampling circuit power supply (3); The voice alarm circuit includes a voice chip (2) and a voice alarm circuit power supply (5). The other end of the relay module (1) is connected to the voice chip (2), and the relay module (1) and the voice chip (2) are respectively connected to the voice alarm circuit power supply (5).

2. The low-voltage connection cabinet control switch status monitoring and alarming device according to claim 1, characterized in that The voice alarm circuit further includes a voice player, and the voice player is connected to the output end of the voice chip (2).

3. The low-voltage connection cabinet control switch status monitoring and alarming device according to claim 2, wherein, The voice player uses a speaker or a power amplifier.

4. The low-voltage connection cabinet control switch status monitoring and alarming device according to claim 3, characterized in that, The voice chip (2) is connected to the speaker through the PWM audio output port or connected to the power amplifier through the DAC output port.

5. The low-voltage connection cabinet control switch status monitoring and alarming device according to claim 1, wherein The relay sampling circuit further includes a working indicator light, and the working indicator light is connected to the relay module (1).

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