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USB serial-port LED double-flash alarm

A technology of USB interface and alarm, applied in the field of alarm, can solve problems such as easy fatigue, complex man-machine interface, direct drive of host program, etc., and achieve the effect of reliable performance, simple structure, and convenient installation and use

Inactive Publication Date: 2014-03-26
DALIAN POWER SUPPLY COMPANY STATE GRID LIAONING ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The man-machine interface of the monitoring system of the power dispatching control center is generally relatively complicated, such as: plant single-line diagram, system power flow diagram, alarm information scrolling window, curve diagram, etc., resulting in the effect of the alarm information classification indication on the controller workstation screen not being outstanding enough. Controllers have to stare closely at the warning window on the screen for a long time, which is prone to fatigue. In the event of an accident or abnormality in the power grid, it is easy to affect the controller's monitoring effect on the operation status of the power grid
Existing alarms generally use high-power light sources for strong flash indication, which require an external power supply and cannot be flexibly and directly driven by the host program through the USB port, so they are not suitable for application in power dispatching control centers

Method used

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  • USB serial-port LED double-flash alarm

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Embodiment Construction

[0008] The present invention will be further described below in conjunction with accompanying drawing:

[0009] As shown in the figure, the USB-to-serial chip U1 given in this embodiment is a 28-pin chip, and this embodiment only uses the TXD pin, VCCIO pin, RXD pin, and GND pin (pins 7, 18, and 21). , USBDP pin, USBDM pin, 3V3OUT pin, CBUS1 pin, CBUS0 pin, AGND pin, VCC pin, TEST pin, a total of 14 pins, the other pins are suspended.

[0010] The TXD pin of the USB-to-serial port chip is directly connected to the RXD pin, which is used for the transceiver loop in data transmission; the GND and AGND pins are grounded, providing shielding and reference potential for the circuit in the chip; the TEST pin is grounded, so that the chip is in normal state after power-on working status.

[0011] The USBDM pin and the USBDP pin of the USB-to-serial port chip are respectively connected to the 2 pin and 3 pin of the USB interface plug-in JP1 for data transmission.

[0012] The 3V3OUT...

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Abstract

The invention relates to a USB serial-port LED double-flash alarm which includes a USB-to-serial-port chip, a USB interface plug-in, LEDs, a current-limiting resistor and a power-supply filtering circuit. The alarm is characterized in that two sending and receiving base pins on the USB-to-serial-port chip form a short circuit. A receiving-state monitoring base pin and a sending-state monitoring base pin on the USB-to-serial-port chip are connected with LEDs respectively. The USB-to-serial-port chip is connected with a host through the USB interface plug-in. In the USB serial-port LED double-flash alarm, the LEDs are driven directly by a host program through a USB interface to flash and alarm and power is supplied by the host directly without an external power supply. The alarm is simple in structure, convenient to install and use and reliable in performance.

Description

technical field [0001] The invention relates to an alarm, in particular to a USB serial port LED double flashing alarm. Background technique [0002] The man-machine interface of the monitoring system of the power dispatching control center is generally relatively complicated, such as: plant single-line diagram, system power flow diagram, alarm information scrolling window, curve diagram, etc., resulting in the effect of the alarm information classification indication on the controller workstation screen not being outstanding enough. The controller has to stare closely at the warning window on the screen for a long time, which is prone to fatigue. In the event of an accident or abnormality in the power grid, it is easy to affect the effect of the controller on monitoring the operation status of the power grid. Existing alarms generally use high-power light sources for strong flash indication, which require an external power supply and cannot be flexibly and directly driven b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08B5/38
Inventor 石文江
Owner DALIAN POWER SUPPLY COMPANY STATE GRID LIAONING ELECTRIC POWER
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