Video surveillance solutions manufacturer Dahua introduces new specialty cameras for the critical infrastructure vertical at ASIS 2017, including explosion-proof devices and a network positioning system.

Critical infrastructure market

“Critical infrastructure is a market that has very specialised needs for video surveillance – there is no ‘one size fits all’ solution,” commented Jennifer Hackenburg, Senior Product Marketing Manager for Dahua Technology USA. “Dahua’s R&D team is continually innovating new products that meet the high requirements of these verticals and help keep people and assets safe.”

Dahua’s explosion-proof cameras offer a combination of rugged reliability and superior optics, an ideal fit for surveillance of explosive and corrosive environments, including chemical plants, refineries, and other facilities in the oil and gas industry. This explosion-proof series of cameras are housed in enclosures that are certified to the ATEX and IECEx standards for equipment in explosive atmospheres.

Each explosion-proof camera features Dahua’s Starlight technology for ultra low-light sensitivity and high-definition sensors that deliver crisp, clear images in real-time. They are IP68-rated to prevent water and dust ingress.

Dahua Starlight IR NPS

The Dahua Starlight IR Network Positioning System delivers HD images in real-time with pin-point accuracy even in corrosive and volatile environments, making it the camera of choice for critical infrastructure applications. These cameras provide positional accuracy to 0.1°, 24/7 touring capabilities, and up to 300 presets for superior coverage over a wide area; and its Starlight technology ensures colour images in near total darkness.

The Dahua Positioning System with integrated Intelligent Video System (IVS) analytics, auto-tracking, and IR illumination provide an all-in-one video surveillance solution.

Visit Dahua at Booth 4145 at the ASIS International Seminar and Exhibits in Dallas, Texas, September 26- 28, and see these cameras, along with other new and innovative products from Dahua.

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Which new buzzwords reflect the security industry’s trends?
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Maximising effectiveness of thermal cameras for temperature screening
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Thermal cameras can be used for rapid and safe initial temperature screening of staff, visitors and customers. Used the right way, the cameras can help prevent unnecessary spread of viruses like the novel coronavirus. During the global pandemic, use of thermal cameras has increased, but they have not always been used correctly, and therefore, not effectively. Hikvision’s temperature screening thermal products are currently assisting users in initial temperature screening across the global market. During 2020, demand increased in most markets, and the company highly recommends that Hikvision’s thermographic cameras be used in accordance with local laws and regulations. Limitations of the technology include throughput and the impact of ambient conditions. 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Temperature screening facilities “There have been some claims that measuring the forehead temperature is not as accurate as measuring the inner canthus, and we believe this video demonstrates the accuracy of forehead measurement very well,” he says. “We also illustrate how the skin temperature will experience a process of recovery (warming up), no matter if it is measured by a thermal camera or a thermometer.” Mr. Li adds that people should wait five minutes in such circumstances before starting a temperature measurement. “We hope that stakeholders who are involved in the design of temperature screening facilities and associated health and safety procedures will recognise how important it is to consider the skin temperature recovery time, and that forehead measurement can provide accurate test results,” says Mr. Li. Thermal imaging manufacturers The algorithm is based on a large number of test results to obtain a value that tends to be dynamically balanced The temperature measurement principle of thermal imaging is to detect the heat radiation emitted by the human body. The detected heat value often does not reflect the true internal body temperature of an individual. Furthermore, the temperature varies among different parts of the human, such as the forehead, ears, underarms, etc. A temperature compensation algorithm can be used to adjust the measured skin temperature to align with the internal body temperature. The algorithm is based on a large number of test results to obtain a value that tends to be dynamically balanced. 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A large amount of test data and practical results indicates that the forehead is a correct and easy-to-use temperature measurement area, says the company. There are advantages and disadvantages of choosing different facial areas for temperature measurement. Default compensation temperature Two main approaches direct the measurement area and how compensation algorithms are applied: Forehead area + default forehead compensation algorithm value Upper half face (forehead + canthus) + default inner canthus compensation algorithm value. Both methods deploy compensation algorithms, but the default compensation temperature of the inner canthus will be less than the default compensation temperature of the forehead, generally speaking. The reason is that the temperature of the inner canthus of most people is higher than their forehead, so the temperature compensation is relatively low (i.e., closer to the actual temperature inside the body.) 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Also, the default forehead compensation temperature is based on rigorous testing and can also correctly mimic the actual temperature of the person being measured, says Mr. Li. After many test comparisons, considering that the results of forehead temperature measurement are relatively more stable, and in order to avoid the false results from inner canthus temperature measurement, Hikvision chose the forehead temperature measurement approach. “We look forward to bringing thermal imaging products from a niche market where there is a relatively high-end industry application to a mass market and serving more users,” says Mr. Li. Facial recognition terminals Additional application parameters can maximise effectiveness of thermal cameras for measuring body temperature: Positioning and height - All cameras must be mounted appropriately to avoid loss of accuracy and performance. 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Unstable environmental condition An unstable environmental condition may affect the accuracy of thermal camera systems Environmental factors can impact the accuracy of thermal cameras, and the idea of using a black body is to provide the camera with a reference point that has a stable temperature. The black body is heated to a specific temperature and helps the thermal camera to know how much error is caused by environmental factors in the room, and how the camera should calibrate itself in real time to improve its accuracy. A black body can help increase the temperature measurement accuracy, and the most common improvement is from ±0.5 degrees to ±0.3 degrees. However, it also increases the cost of the installation. In some markets, customers may require black bodies in order to comply with regulatory accuracy requirements. An unstable environmental condition may affect the accuracy of thermal camera systems for measuring temperature. Medical temperature measurement Therefore, Hikvision suggests that the ambient conditions should be met for installation and use. First of all, users should avoid installing devices in hot or changeable environments. All cameras require indoor environments with calm air, consistent temperature and no direct sunlight. Installation should also be avoided in semi-open locations that may be prone to changes in ambient conditions, such as doorways, and there should be enough stable, visible light. All devices should be installed to avoid backlighting, high temperature targets, and reflections in the field of view as far as possible. “We often see the misconception that thermal cameras can replace medical temperature measurement equipment, which is not the case,” says Mr. Li. 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Looking back at 2020: Cloud systems expand in shadow of COVID
Looking back at 2020: Cloud systems expand in shadow of COVID

The cloud is here to stay. Its resilience and ability to connect the world during during the COVID-19 pandemic has proved its worth, even to the uninitiated who have now witnessed first-hand the value of connected systems. Video and access control as a service provides a flexible and fluid security and business solution to meet the demands of a rapidly evolving industry, where the changing threat landscape means investing in the cloud is an investment towards success. This article will look back at our articles in 2020 about the growing popularity of cloud solutions for physical security, with links to the original content. Product offering While most people agree on the definition of “cloud,” there are several points about the terminology that may require clarification. Private cloud or public cloud? VSaaS or unlimited storage for video? 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