CN202836767U - Infrared temperature monitoring and warning device of electric power system - Google Patents

Abstract

An infrared temperature monitoring and warning device of an electric power system belongs to the technical field of electric power equipment. The infrared temperature monitoring and warning device is characterized in that an infrared temperature detector is connected with a wireless transmission module through an amplifying circuit and a band-pass filter, a receiving module is connected with a data processing integrated circuit, the I/O (input/output) port of the data processing integrated circuit is connected with a Pa0-Pa7 port of a main SCM (single chip microcomputer), and a parallel port of a keyboard display circuit is connected with a Pb0-Pb7 port of the main SCM. The infrared temperature monitoring and warning device has the advantages that 1.the measuring answering time is short, the device is non-contacted and safe to utilize, and the service life is long; 2.the difficult problem of field wiring and routing is avoided and the field installation becomes more convenient; 3.the influence of the environmental factor on the measuring temperature is greatly decreased; 4.the accuracy of measured points is improved greatly; and 5.on the networking aspect, the speed of data transmission and procession is increased by utilizing sensor network technology.

Description

The monitoring of electric system infrared temperature and prior-warning device

Technical field

The utility model belongs to electrical equipment technical field.

Background technology

The electric system temperature measuring equipment mainly is used in easy heating part, and such as high voltage bus, large transformer etc., contact type temperature measuring is also adopted in present most of temperature survey, and its advantage is that price is very low.But it is very strict that contact type temperature measuring requires aspect Installation and Debugging, and danger is very large when charged installation, debugging, replacing especially.Adopt wired mode in data transmission, in high voltage environment, increasing or more very difficult during emat sensor, because distribution again when the contact temperature-measuring sensor is installed.Aspect network management, temperature measuring equipment mostly adopts legacy network at present, and its call duration time is long, and picking rate is slow.

Non-contact infrared thermometer is developed rapidly technically, and performance is constantly perfect, and function constantly strengthens, and kind is on the increase, and the scope of application also constantly enlarges, the market share increase year after year.Compared with the contact temperature-measuring method, infrared measurement of temperature has the advantages such as fast, noncontact of response time, use safety and long service life.But there is following shortcoming in present infrared temperature measurement apparatus: 1, be subject to such environmental effects (the electromagnetism electric field disturbs, environment temperature, airborne dust etc.).2, the thermometric reading impact for the metal surface of light or polishing is larger.3, be only limited to measurement object external temperature, the temperature when being inconvenient to measure interior of articles and having barrier.

Summary of the invention

The purpose of this utility model is: a kind of electric system infrared temperature monitoring and prior-warning device are provided, and it adopts infrared contact-free measurement of temperature technology, can carry out thermometric to the electric system device quickly and accurately.

The technical solution of the utility model is:

The infrared measurement of temperature detector is connected with wireless transmitter module by amplifying circuit and bandpass filter;

Receiver module is processed integrated circuit with data and is connected, the I/O port that data are processed integrated circuit is connected with the Pa0-Pa7 port of host scm, the Pb0 of keyboard-display circuit parallel port and host scm-Pb7 FPDP is connected, adopt 485 communication interfaces with communicating by letter of host computer, data are processed integrated circuit and are linked to each other with host scm TR2, TX2 interface, adopt the Modbus stipulations with host computer, high speed photo coupling is connected with host scm PC mouth, and output drives warning circuit by relay.

The beneficial effects of the utility model are:

1, adopts fast, the noncontact of infrared non-cpntact measurement response time, use safety and long service life.

2, sensor adopts wireless transmission to data transmission between receiving trap, has avoided the difficult problem of field wiring cabling, makes on-the-spot installation more convenient.

3, in signal processing circuit, added compensating circuit, greatly reduced the measurement temperature and be subjected to such environmental effects.

4, for can the Measurement accuracy measured point, we have installed laser collimation device at measuring head, have greatly improved the accuracy of measured point.

5, networking aspect adopts the Sensor Network technology to increase data transmission and processing speed, uses in the Time synchronization technique of HRTS algorithm especially and has greatly improved the practicality of system and the robustness of network.

Description of drawings

Fig. 1 is the utility model infrared measurement of temperature schematic diagram;

Fig. 2 is the utility model schematic block circuit diagram;

Fig. 3 is the utility model wireless transmit equivalent circuit diagram;

Fig. 4 is the utility model wireless receiving equivalent electrical circuit;

Fig. 5 is the utility model CPU governor circuit figure.

Embodiment

Below in conjunction with accompanying drawing the utility model is described further:

As shown in Figure 1, optical system adopts condenser, and detector adopts infrared temperature sensor.Its temperature-measurement principle is as follows:

Spoke out-degree according to this special fence-Boltzmann theorem black matrix Pb (Τ)With temperature ΤThe be directly proportional mathematical description of the radiation temperature measure that is object of biquadratic:

Can derive the radiator temperature and detect relational expression between the voltage by planck formula:

V=RaεσT ⁴=KT ⁴ （4）

K=Ra ε σ in the formula determines that by experiment ε gets 1 during calibration

The absolute temperature of T-testee

R---detector sensitivity

A---with the constant of atmospheric attenuation distance dependent

ε---radiance

σ---Si Difen-Boltzmann constant

Therefore, can determine by detecting voltage the temperature of testee, following formula shows that detector output signal and target temperature are nonlinear relationship, and V is directly proportional with the biquadratic of T, so will carry out linearization process.Obtain the apparent temperature of object after the linearization process, need carry out radiance and be modified to true temperature,

Its corrector is:

T in the formula _r---radiation temperature (apparent temperature)

ε (T)---radiance gets 0.1～0.9

Because the impact of modulation sheet radiation signal, the revised true temperature of radiance is the temperature that is higher than environment, also must do the ring temperature compensation and repay, and namely true temperature adds the actual temperature that the pressed on ring temperature could finally obtain testee.

Shown in Fig. 2,3,4,5, Q is that switching tube, C are that electric capacity, R are that resistance, L are telefaults.

Come the collecting temperature signal by the infrared measurement of temperature detector, temperature signal carries out amplification filtering through amplifying circuit and bandpass filter LMS87 to signal, has wherein used high performance amplifier Op37 to design the temperature-compensation circuit temperature signal and has carried out temperature compensation.Temperature signal after the amplification filtering transfers out by the CC2430 wireless transmitter module, and CC2430 is the high-performance wireless transmitter module that combines in single-chip microcomputer, and the temperature signal data line connects the single chip communication interface.By the CC2431 receiver module data receiver of harvester is come, processing integrated circuit EMP7812E by data processes data, serial data is become parallel data, process the I/O port of integrated circuit EMP7812E by data data are delivered to host scm 8 bit data ports (Pa0-Pa7), host scm selects ATMEGA128A its objective is can improve signal processing and communication speed greatly.Clock circuit is selected the SD21201API module, provides accurate clock information by it for device, and interface mode is the SPI interface mode.The memory circuit chip is selected C2401, and it has the memory space of 2KB, and interface is I ²The C interface mode.Keyboard-display circuit is selected the 7289BS chip, adopts parallel mode, and the Pb0 of the parallel port of 7289BS chip and host scm-Pb7 FPDP is connected.Adopt 485 communication interfaces with communicating by letter of host computer, the MAX3535E chip links to each other with host scm TR2, TX2 interface, adopts the Modbus stipulations with host computer.Alerting signal selects high speed photo coupling PLC127 to be connected with host scm PC mouth as alerting signal output, and output drives warning circuit by relay HF115F-A.

Claims (1)

1. an electric system infrared temperature is monitored and prior-warning device, it is characterized in that:

The infrared measurement of temperature detector is connected with wireless transmitter module by amplifying circuit and bandpass filter;

Receiver module is processed integrated circuit with data and is connected, the I/O port that data are processed integrated circuit is connected with the Pa0-Pa7 port of host scm, the Pb0 of keyboard-display circuit parallel port and host scm-Pb7 FPDP is connected, adopt 485 communication interfaces with communicating by letter of host computer, data are processed integrated circuit and are linked to each other with host scm TR2, TX2 interface, adopt the Modbus stipulations with host computer, high speed photo coupling is connected with host scm PC mouth, and output drives warning circuit by relay.

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