Bench drill is a compact size of the pillar drill that is designed for drilling holes through materials including a range of woods, plastics and metals. They are suitable for smaller holes or work pieces and have moderate to high speeds. The dills always come with a belt driver that makes it possible to select different speed: High speed for wood and lower speed for metal. In order to suit different size of projects, the height and angle of bench is adjustable.
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In 1964, Texas Instruments pioneered the development of the first generation of infrared imaging devices for military use, known as the Infrared Finder (FLIR). These early systems used an optical-mechanical scanning mechanism to detect and capture infrared radiation from objects. The radiation was then converted into electrical signals by a photon detector, processed, and finally displayed as a thermal image on a screen. By the mid-1960s, Swedish company AGA and the Swedish National Electric Power Bureau introduced a second-generation thermal infrared imaging device capable of measuring temperature, commonly referred to as a thermal imager.
In the security field, infrared thermal imaging cameras are often called thermal imaging cameras. Their core principle involves focusing infrared radiation emitted by objects using optical lenses, which is then detected by an infrared sensor. The data is sent to sensor electronics for processing, and the system converts this information into a visible image that can be displayed on standard video monitors or LCD screens, or even accessed through networked computers. The key components include the optical system (lens), infrared detectors, and signal processing circuits. The performance and design of each part directly impact the quality and stability of the thermal images produced.
Thermal imaging cameras display the thermal image of the object being measured, representing the heat distribution across its surface. This image essentially shows the infrared radiation pattern of the target. However, because the signal is weak, it lacks the depth and contrast found in visible light images. To improve usability in practical applications, various techniques such as brightness control, calibration with reference standards, and false color rendering are often employed.
In the security domain, infrared thermal imaging products are typically divided into two categories: observation thermal imagers and thermal imaging cameras. Observation thermal imagers are designed for high sensitivity and the ability to penetrate environmental conditions like smoke, fog, and haze, enabling continuous monitoring throughout the day. They are widely used in highway surveillance, airport operations, and border defense. When combined with visible light cameras and laser illumination, they can enhance surveillance capabilities, allowing for target detection, tracking, and identification.
The second type, thermal imaging cameras, adds temperature measurement functionality. Equipped with long focal length lenses, these devices can measure temperatures from distances up to 1–2 kilometers or more. Their temperature accuracy is comparable to handheld thermometers. With real-time temperature analysis, they allow users to set absolute or relative alarm thresholds, helping prevent potential fire hazards. These cameras are commonly used in forest fire prevention and urban fire warning systems.
According to Cheng Hao from Hangzhou Hikvision Digital Technology Co., Ltd., "Infrared thermal imaging technology in security primarily refers to thermal imaging network cameras. Traditional thermal imaging cameras and thermal imaging network cameras address issues such as limited functionality, inconvenient installation, high labor costs, and lack of timely data transmission. By integrating thermal imaging into a broader network monitoring platform, it enables round-the-clock, large-scale monitoring. Thermal images can be transmitted in real time to the monitoring center for analysis."
Ruan Wu, a product manager at Changzhou Mingjing Electronics Co., Ltd., noted that "thermal imagers focus mainly on detecting heat and may not require detailed resolution. In contrast, thermal imaging cameras demand higher sensitivity and must be able to capture the general shape of the object being measured."