CN201340555Y

CN201340555Y - Temperature online-monitoring device of high-voltage electric control cabinet

Info

Publication number: CN201340555Y
Application number: CNU2008200817188U
Authority: CN
Inventors: 马文瑾; 吴加权; 马琨; 李迅鹏; 高永卫
Original assignee: Kunming University of Science and Technology
Current assignee: Kunming University of Science and Technology
Priority date: 2008-09-26
Filing date: 2008-09-26
Publication date: 2009-11-04
Anticipated expiration: 2018-09-26

Abstract

The utility model relates to an automatic temperature monitoring and alarming device of a high-voltage electric control cabinet. The device comprises a signal collecting device which is composed of a circular sleeve, a thermopile infrared sensor and a Fresnel lens, a nether system terminal processor, an RS232/RS485 forwarder, a PC host supervisory computer and a system monitoring software. The signal collecting device is positioned in a high-voltage electric switch cabinet and just faces contacts. The nether system terminal processor adopts a single chip microcontroller to process signals collected by the infrared sensor. The RS232/RS485 forwarder is connected with a COM port of the PC host computer and a single output end of the nether system terminal processor, thereby realizing real-time half-duplex communication between the PC computer and the single chip microcontroller. The device realizes the utilization of one PC supervisory computer to carry out real-time online monitoring and alarming on the work temperatures of all switch contacts in different control cabinets of different plants; and when the temperatures are abnormal, the device automatically cut off the power supply of the control cabinet. The device is suitable for monitoring the temperature of the contacts in the high-voltage electric control cabinet in industrial and mining establishments.

Description

High-voltage electrical apparatus switch board temperature online supervising device

Technical field

The utility model relates to a kind of industrial temperature supervising device, and particularly intelligentized high-voltage electrical apparatus switch board temperature online is monitoring and warning device automatically.

Background technology

The high-voltage switch gear switch board is being undertaken and is being closed the dual-use function that closes and cut-off power circuit, protection machinery and equipment security of system in enterprise produces.And the contact performance of the interior conductor wire junction of cabinet directly has influence on the reliability of switch cubicle work.In the process that enterprise produces, owing to all may causing switch contact position temperature, reasons such as machinery shakes, overload, contact ablation raise, then local melting welding or generation spark even arc discharge occur and bring disaster to insulating material on every side, can cause high-tension switch cabinet to produce explosion phenomenon under the serious situation, finally cause the damage of electrical equipment, bring great property and economic loss to enterprise.Therefore, need carry out real-time temperature monitoring, realize temperature alarm, avoid major accident to take place each switch contact in the high voltage control cabinet.

At present, manufacturing enterprise mainly based on artificial patrolling and examining, this monitoring mode mainly relies in the personal experience who detects the employee for the monitoring means of high-tension switch cabinet routine.Personal monitoring's mode often is difficult to the fault of finding that switch cubicle is potential, more can't the failure judgement development trend.At the deficiency of manual inspection, each scientific research institutions and manufacturer have developed the weakness that a series of novel high-tension switch cabinet device for detecting temperature have overcome manual inspection to a certain extent.These thermometric modes roughly have: (1) infrared imaging, by the infared spectrum of thermal infrared imager acquisition switch cubicle, judge the temperature of switch cubicle indirectly by infared spectrum.(2) optical fiber temperature-measurement mounts fibre optic temperature sensor on the electrical contact surface, be connected to the optical fiber detuner that is installed on cabinet by optical cable, the corresponding temperature data of optical fiber detuner output.(3) traditional contact temperature-measuring adopts traditional contact type temperature sensor thermopair, integrated temperature sensor etc. to carry out temperature detection.

Though above-mentioned detection device has solved the problem that manual inspection exists, but still there is the place of many deficiencies.In the infrared imaging temperature measuring technology, the thermal infrared imager price is comparatively expensive, and enterprise needs input cost higher, and needs to be equipped with special detection technique personnel, is unfavorable for extensively promoting the use of; The mode of optical fiber temperature-measurement is used at present more, but its supporting optical fiber sensing network analyser volume is bigger, can't install in that switch cubicle is inner, and this analyser only provides the communication interface with the separate unit machine simultaneously, has certain limitation in the use; Tradition contact temperature-measuring mode need be installed on Temperature Detector and the inductive coil that obtains power supply on the high voltage bus, and the inner installation of this switch cubicle narrow and small in the space is difficulty comparatively, might reduce the insulation clear distance of switch cubicle inside simultaneously.

The summary of the invention the purpose of this utility model, be to provide a kind of manpower that can save manual inspection, overcome manual inspection and be difficult to the fault of finding that switch cubicle is potential, more can't the failure judgement development trend cover end, and circuit reduction, stability is high, price is low and can be simultaneously the working temperature of each switch contact in many high-voltage electrical apparatus switch boards under in running order in the different factory buildings be carried out real time and on line monitoring, when the high temperature unusual condition occurring, report to the police and the automatic device that cuts off of power supply, eliminate safe hidden trouble.

The purpose of this utility model is achieved in that this supervising device mainly comprises:

Signal pickup assembly is made up of circular casing 1, thermoelectric pile infrared sensor 2, Fresnel Lenses 3, is installed in the high-voltage electrical apparatus switch board over against each switch contact place, is used to gather the temperature of the switch contact in the high-voltage electrical apparatus switch board;

The next monitoring client controller 5, employing single-chip microcomputer, comprising: power circuit unit, sensor front end signal magnification processing, A/D AD conversion unit, data micro-processor interface circuit unit, communication unit, control output unit; Its input end is connected with the output terminal of signal pickup assembly, and output terminal is connected with RS232/RS485 transponder 7; Be used for the signal that signal pickup assembly collects is handled, and communicate by letter with upper PC monitoring equipment 9;

RS232/RS485 transponder 7, its usefulness quad system bus 8 link to each other the COM connector 6 of the next monitoring client controller 5 and upper PC monitoring equipment 9; ,

Upper PC monitoring equipment 9 is used for realizing intercommunication with each the next monitoring client controller 5;

System monitoring software is used to realize the intercommunication of the next monitoring client controller 5 and upper PC monitoring equipment 9, and the temperature anomaly situation alerting signal of the next system terminal handler 5 is set, and control output unit part is set the switch board power supply is cut off automatically.

The principle of work of this device is: the infrared ray that the temperature of switch contact is sent, after seeing through Fresnel Lenses, by the thermopile IR detector collection, the signal that collects is after the next system terminal handler is handled, reach PC upper monitoring machine through the RS232/RS485 transponder, the monitor staff understands the state of temperature of each switch contact in each high-voltage electrical apparatus switch board at any time from PC upper monitoring machine, realize half-duplex operation in real time between PC and the single-chip microcomputer.When the temperature that monitors when the next system terminal processor 5 surpassed the definite value that system monitoring software is provided with, the panalarm on the PC sent alerting signal, and by control output unit part the switch board power supply is cut off processing automatically.

The beneficial effects of the utility model are: owing to adopted signal pickup assembly to place in the high-voltage electrical apparatus switch board over against each switch contact place, and be connected with the next monitoring client controller, after the single-chip microcomputer of collection result in the next system terminal handler handled with the communication that is connected of Control Room PC, so both saved the manpower of manual inspection, overcome manual inspection and be difficult to the fault of finding that switch cubicle is potential, drawback that more can't the failure judgement development trend, can simplify circuit greatly again, improve stability, because the signal pickup assembly volume is little, cost is low, has both helped being installed in the high-voltage electrical apparatus switch board, help reducing price again, wide popularization and application; Adopt communicating to connect of single-chip microcomputer and PC, help long-distance transmissions, realize that a PC monitoring equipment can carry out real time and on line monitoring to each switch contact working temperature in the different switch boards of different factory buildings.Because the PC monitoring equipment is by the system monitoring software setting, to sending alerting signal, and the switch board power supply is cut off processing automatically by control output unit part from the temperature anomaly situation of the next system terminal handler 5, eliminated potential safety hazard.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 gets for this device thermoelectric pile infrared sensor signal and adopts synoptic diagram;

Fig. 2 installs the circuit theory diagrams of the next system terminal handler for this;

Fig. 3 is this device RS232/RS485 repeater circuit schematic diagram;

Fig. 4 is the structural representation of this device.

Among the figure, 1 circular casing; 2 thermopile IR detectors; 3 Fresnel Lenses; The infrared ray that send 4 contacts; 5 the next terminal handlers; 6PC machine COM connector; The 7RS232/RS485 transponder; 8 quad system buss; 9 upper PC monitoring equipments.

Embodiment

Embodiment, shown in Fig. 1-4, this device for detecting temperature is made up of circular casing 1, pyroelectric infrared sensor 2, the signal pickup assembly of Fresnel Lenses 3 ingredients, the next system terminal handler 5, RS232/RS485 transponder 7, upper PC monitoring equipment 9 and system monitoring software.Referring to Fig. 1 and Fig. 2, in each electric control cabinet, put the signal pickup assembly that a cover is made of jointly pyroelectric infrared sensor, Fresnel Lenses and circular casing over against each switch contact; The next system terminal handler adopts single-chip microcomputer (being the AT89C51 among Fig. 2) that the data-signal that collects is carried out analytical calculation and handles, signal is transferred to the com port 6 of PC upper monitoring machine 9 by the RS232/RS485 transponder, realizes half-duplex operation in real time between PC 9 and the single-chip microcomputer.The next system terminal handler comprises: power circuit unit, sensor front end signal magnification processing, A/D AD conversion unit, data micro-processor interface circuit unit, communication unit, 6 parts of control output unit.Wherein, LM324 has constituted the front end signal magnification processing sensor signal has been carried out processing and amplifying; ADC0809 and 74LS02 form the A/D converting unit acquired signal are carried out mould/number conversion; Switching signal transfers to the AT89C2051 microprocessing unit by data bus and carries out data processing.Processing signals is through RO, the DI of MAX485 communication unit input Transistor-Transistor Logic level, from SinA, SinB end output 485 signals; 485 signals are connected terminal on the quad system bus 8 by the J1 input/output interface of RS232/RS485 transponder 7 again.As shown in Figure 3, J1 provides the data communication interface of controller and PC 9 in the circuit of RS232/RS485 transponder 7, and wherein DTR is a receipts/Data Control pin of computing machine, is connected the 4th pin of PC com port.PCT is the output pin of the computer sends the data, is connected the 3rd pin of computing machine com port; PCR is the input pin of computer receiving data, is connected the 2nd pin of PC com port; GND is the shared grounding line of computing machine communication, is connected the 5th pin of computing machine com port; 1,2,5,6 pin and the U1 that are connected on the MAX232 among Fig. 3 form the change-over circuit of RS-232 level to Transistor-Transistor Logic level; U2 is the conversion of Transistor-Transistor Logic level to the RS485 level; J2 provides the support of 5V power supply for control end; J3 is the input/output interface of 485 networks, is used to connect each terminal alarm; The Physical layer that this control circuit is finished RS485 network and PC communication links.Source of early warning on this device for monitoring temperature PC can adopt the common PC sound equipment, by the system monitoring software setting, to sending alerting signal from the temperature anomaly situation of the next system terminal handler 5.Simultaneously, when appearring in temperature, unusual condition also can cut off processing automatically to the switch board power supply by control output unit part.

Claims

1, high-voltage electrical apparatus switch board temperature online supervising device, it is characterized in that, this device comprises the signal pickup assembly of being made up of circular casing (1), thermoelectric pile infrared sensor (2), Fresnel Lenses (3), it is interior over against each switch contact place to be installed on the high-voltage electrical apparatus switch board, is used to gather the temperature of the switch contact in the high-voltage electrical apparatus switch board;

The next monitoring client controller (5), employing single-chip microcomputer, comprising: power circuit unit, sensor front end signal magnification processing, A/D AD conversion unit, data micro-processor interface circuit unit, communication unit, control output unit; Its input end is connected with the output terminal of signal pickup assembly, and output terminal is connected with RS232/RS485 transponder (7); Be used for the signal that signal pickup assembly collects is handled, and communicate by letter with upper PC monitoring equipment (9);

RS232/RS485 transponder (7), its usefulness quad system bus (8) link to each other the COM connector (6) of the next monitoring client controller (5) and upper PC monitoring equipment (9);

Upper PC monitoring equipment (9) is used for realizing intercommunication with each the next monitoring client controller (5).