I. Requirements Analysis

In recent years, as infrared thermal imaging diagnostic technology has matured in its application within the power sector, it has played an increasingly significant role in the online monitoring of distribution equipment. Leveraging its thermal sensitivity as high as 0.06 degrees, it detects thermal defects in high-voltage equipment and lines, such as transformers, bushings, circuit breakers, disconnect switches, instrument transformers, power capacitors, surge arresters, power cables, busbars, conductors, composite switchgear, insulator strings, low-voltage electrical equipment, and secondary circuits of devices with current/voltage-induced heating effects or other thermal effects. This capability plays a crucial and effective role in the timely detection, handling, and prevention of major accidents.

II. Working Principle

The working principle of the dual-beam infrared temperature measurement device for power distribution is based on infrared thermal imaging technology. It detects the infrared radiation emitted by objects to measure changes in surface temperature distribution, thereby locating defects.

Infrared thermal imagers operate on the principle of infrared radiation, whereby any object possessing a certain temperature emits infrared light. By detecting the infrared radiation emitted by objects, converting it into electrical signals, and then outputting it through imaging devices, these instruments can simulate the spatial distribution of temperatures across the scanned object's surface, generating clear thermal images.

III. Features and Functions

1. Supports three operating modes: Sleep Mode, Low Power Mode, and Full Power Mode; defaults to Low Power Mode.

2. Standby power consumption shall not exceed 0.17W, with operating power consumption at 20W.

3. Supports temperature measurement with an accuracy of ±2°C (or ±2% of the measurement range);

4. Supports magnetic encoder closed-loop control with positioning accuracy deviation less than 0.1 degrees, ensuring no drift during equipment operation.

5. The front-end features multispectral intelligent algorithms that filter out false alarms such as solar reflections.

6. The thermal imaging channel employs an electronically controlled focus lens equipped with a high-durability motor, ensuring long-term stable operation of the equipment.

7. Compact device size, with a total weight of 5 kg;

8. The equipment supports horizontal 360° rotation and vertical ±90° rotation, enabling a single unit to cover a wide area.

9. Application Scenarios: Suitable for online monitoring of transmission and distribution lines and terminal towers at all voltage levels for State Grid, China Southern Power Grid, and various power generation groups, as well as other temperature measurement scenarios.

IV. Technical Specifications

Serial Number	Project Name	Technical Specifications
1	Thermal imaging	Uncooled Vanadium Oxide Detector
		640 x 512
		0.5m
		1353m
		441m
		±2 degrees (or ±2% of the range)
		-20°C to 150°C, 0°C to 550°C
2	Pan-Tilt Function	Horizontal 360° / Vertical -90° to 90°
		±0.1°
		8 tracks, each supporting up to 256 preset points
3	Interface	2-channel digital input (0-5 VDC)
		2-channel, supports alarm linkage
		Omnidirectional, sensitivity -24dB, signal-to-noise ratio 60dB
4	System Parameters	DC9~28V
		IP67
		Temperature: -40°C to 70°C (outdoor), humidity less than 90%