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A thermographic camera is a device that creates an image using infrared (IR) radiation, similar to a normal camera that forms an image using visible light. Instead of the 400–700 nanometre (nm) range of the visible light camera, infrared cameras are sensitive to wavelengths from about 1,000 nm to about 14,000 nm (14 μm). The practice of capturing and analyzing the data they provide is called thermography.
Measurement and signature intelligence (MASINT) is a technical branch of intelligence gathering, which serves to detect, track, identify or describe the distinctive characteristics (signatures) of fixed or dynamic target sources. This often includes radar intelligence, acoustic intelligence, nuclear intelligence, and chemical and biological intelligence. MASINT is defined as scientific and technical intelligence derived from the analysis of data obtained from sensing instruments for the purpose of identifying any distinctive features associated with the source, emitter or sender, to facilitate the latter's measurement and identification.
Motion detection is the process of detecting a change in the position of an object relative to its surroundings or a change in the surroundings relative to an object. It can be achieved by either mechanical or electronic methods. When it is done by natural organisms, it is called motion perception.
A security alarm is a system designed to detect intrusions, such as unauthorized entry, into a building or other areas, such as a home or school. Security alarms protect against burglary (theft) or property damage, as well as against intruders. Examples include personal systems, neighborhood security alerts, car alarms, and prisons.
A radar detector is an electronic device used by motorists to detect if their speed is being monitored by police or law enforcement using a radar gun. Most radar detectors are used so the driver can reduce the car's speed before being ticketed for speeding. In general sense, only emitting technologies, like doppler RADAR, or LIDAR can be detected. Visual speed estimating techniques, like ANPR or VASCAR can not be detected in daytime, but technically vulnerable to detection at night, when IR spotlight is used. There are no reports that piezo sensors can be detected. LIDAR devices require an optical-band sensor, although many modern detectors include LIDAR sensors. Most of today's radar detectors detect signals across a variety of wavelength bands: usually X, K, and Ka. In Europe the Ku band is common as well. The past success of radar detectors was based on the fact that radio-wave beams can not be narrow-enough, so the detector usually senses stray and scattered radiation, giving the driver time to slow down. Based on a focused laser-beam, LIDAR technology does not suffer this shortcoming; however it requires precise aiming. Modern police radars incorporate formidable computing power, producing a minimum number of ultra-short pulses, reusing wide beams for multi-target measurement, which renders most detectors useless. But, mobile Internet allows GPS navigation devices to map police radar locations in real-time. These devices are also often called "radar detectors", while not necessary carrying an RF sensor.
A passive infrared sensor is an electronic sensor that measures infrared (IR) light radiating from objects in its field of view. They are most often used in PIR-based motion detectors. PIR sensors are commonly used in security alarms and automatic lighting applications.
A motion detector is an electrical device that utilizes a sensor to detect nearby motion. Such a device is often integrated as a component of a system that automatically performs a task or alerts a user of motion in an area. They form a vital component of security, automated lighting control, home control, energy efficiency, and other useful systems.
A gunfire locator or gunshot detection system is a system that detects and conveys the location of gunfire or other weapon fire using acoustic, vibration, optical, or potentially other types of sensors, as well as a combination of such sensors. These systems are used by law enforcement, security, military, government offices, schools and businesses to identify the source and, in some cases, the direction of gunfire and/or the type of weapon fired. Most systems possess three main components:
A stud finder is a handheld device used with wood buildings to locate framing studs located behind the final walling surface, usually drywall. While there are many different stud finders available, most fall into two main categories: magnetic stud detectors and electric stud finders. There are also some devices employing radar.
An occupancy sensor is an indoor device used to detect the presence of a person. Applications include automatic adjustment of lights or temperature or ventilation systems in response to the quantity of people present. The sensors typically use infrared, ultrasonic, microwave, or other technology. The term encompasses devices as different as PIR sensors, hotel room keycard locks and smart meters. Occupancy sensors are typically used to save energy, provide automatic control, and comply with building codes.
A proximity sensor is a sensor able to detect the presence of nearby objects without any physical contact.
A gas detector is a device that detects the presence of gases in an area, often as part of a safety system. A gas detector can sound an alarm to operators in the area where the leak is occurring, giving them the opportunity to leave. This type of device is important because there are many gases that can be harmful to organic life, such as humans or animals.
Project Hostile Intent is an ongoing project of the United States Department of Homeland Security and Human Factors Division. It has been renamed to Future Attribute Screening Technology. This project comes under the Social and Behavioral Research (SBR) Program, one of the three broad program areas within the Science and Technology (S&T) Directorate of the Department of Homeland Security (DHS) that "sponsors research to inform, develop, and test tools and methodologies to assess terrorist threats, understand terrorism, and improve national security".
Electro-optical MASINT is a subdiscipline of Measurement and Signature Intelligence, (MASINT) and refers to intelligence gathering activities which bring together disparate elements that do not fit within the definitions of Signals Intelligence (SIGINT), Imagery Intelligence (IMINT), or Human Intelligence (HUMINT).
The Explosives Division (EXD) is a division of the Science and Technology Directorate of the United States Department of Homeland Security. Within the Homeland Security Advanced Research Projects Agency, EXD develops technologies needed to detect, interdict, and lessen the effect of non-nuclear explosives used by terrorists against mass transit, civil aviation, and critical infrastructure.
The Chemical and Biological Defense Division (CBD) is a division of the Science and Technology Directorate of the United States Department of Homeland Security. Within the Homeland Security Advanced Research Projects Agency, CBD develops technologies to increase the United States's preparedness and protect key national infrastructure against chemical, biological, and agricultural threats and disasters through improved threat awareness and advanced surveillance, detection, and protective countermeasures.
A flame detector is a sensor designed to detect and respond to the presence of a flame or fire, allowing flame detection. Responses to a detected flame depend on the installation, but can include sounding an alarm, deactivating a fuel line, and activating a fire suppression system. When used in applications such as industrial furnaces, their role is to provide confirmation that the furnace is working properly; it can be used to turn off the ignition system though in many cases they take no direct action beyond notifying the operator or control system. A flame detector can often respond faster and more accurately than a smoke or heat detector due to the mechanisms it uses to detect the flame.
Xtralis, now part of Honeywell, was a privately held firm. It manufactures smoke detection, gas detection and video surveillance security products for the early detection, visual verification, and prevention of fire and intrusion threats.
Human presence detection is a range of technologies and methods for detecting the presence of a human body in an area of interest (AOI), or verification that computer, smartphone is operated by human. Software and hardware technologies are used for human presence detection. Unlike human sensing, that is dealing with human body only, human presence detection technologies are used to verify for safety, security or other reasons that human person, but not any other object is identified. Methods can be used for internet security authentication. These include software technologies such CAPTCHA and reCAPTCHA, as well as hardware technologies such as:
References
- ↑ Teixeira, Thiago, et al. "A Survey of Human-Sensing: Methods for Detecting Presence, Count, Location, Track, and Identity"
- ↑ ENSCO, Inc. "MicroSearch G3"
- ↑ Geovox Security Inc. "AVIAN Heartbeat Detector"
- ↑ Intelligent Security Limited. "Heartbeat - Human Detection System"
- ↑ Armstrong Monitoring. "Human Occupancy Detector"
- ↑ Press Office, Science and Technology Directorate, U.S. Department of Homeland Security. "DHS Teams Up With NASA to Find Heartbeats in Rubble", 17 September 2013.
- ↑ Science and Technology Directorate, U.S. Department of Homeland Security. "Detecting Heartbeats in Rubble: DHS and NASA Team up to Save Victims of Disasters"
- ↑ Pilkington, Ed. "Urban Shield: after Ferguson, police and suppliers consider fate of military-grade tactical gear", The Guardian , 8 September 2014.
- ↑ "World's first 'human detector' to protect homeless people sleeping in bins launched". The Independent. 15 December 2019. Retrieved 15 April 2020.