Optimal Performance of Thermal Imaging CCTV Camera Technology
The security requirements in the world have been transformed by the COVID-19 pandemic, for this reason security technologies have also begun to focus on these needs, it is necessary to know the optimal operating parameters of these solutions.
The executives in charge of facilities often have a multifaceted role, as they are responsible for its general maintenance: structural maintenance of the building and general systems, aspects related to HVAC and lighting, waste management and a variety of elements that ensure that the site can guarantee its operations and is suitable to receive workers and visitors.
Due to the COVID-19 pandemic, these executives have had to incorporate a new level of responsibilities into their tasks: determining the safest way to restart operations in facilities that have been closed or to allow customers to enter without contributing again. to the spread of a highly contagious virus.
Therefore, the focus is now on what new procedures should be implemented, in accordance with the safety guidelines established in relation to cleaning and disinfection protocols, capacity limits and social distancing standards.
Although all these measures are critical to guarantee the correct disinfection and safety of the workspaces, there is a marked tendency to recognize that technology – specifically thermal camera systems – will also play a key role.
These systems will proactively determine whether an employee or visitor has a high temperature (one of the most common symptoms of COVID-19), establishing a critical first line of defense to help businesses allow or deny access. to your facilities.
Many executives in charge of facilities already know about the implementation and key benefits of surveillance CCTV camera solutions: Being a matter of investment and implementation of a security system, they are often involved in the decision making.
Those that include a blackbody calibration device usually offer a higher level of precision. By allowing continuous camera calibration, the black body device mitigates many of the external factors that can affect the accuracy of the camera’s thermal sensor, such as ambient temperature.
When properly installed in a suitable deployment environment, the Blackbody Calibrated Thermal Camera can achieve an accuracy of ± 0.3 ° C / 0.5 ° F.
Also, it is important to ensure that the system is calibrated. To do this, wait 30 minutes for the unit to stabilize and an initial set point for the temperature can be established. It should be noted that the blackbody device should also include a calibration certificate.
Another issue to consider is the location where the thermal camera system is expected to be installed, which is an essential point to ensure its correct operation.
This includes the height and distance between the camera and the black body device. The installation guides will provide calibration parameters to analyze the proper distance between the camera and the person being scanned. It is important to install the cameras parallel to people’s faces to ensure accurate readings.
The system deployment environment is also an important point. The camera system should not be located in a large glazed entry hall, or in any space where there are fluctuating drafts, as cameras are often susceptible to bright background lighting.
Direct sun exposure can affect results, as can placing cameras near an entrance with ventilation and heating sources.
This is known as temperature drift, a phenomenon by which the opening or closing of a door near a thermal camera system generates an air current and a possible change in temperature as a result of the combination of air coming from outside with the room temperature.
For this reason, it is always recommended to locate thermal camera systems approximately 5 m (16 ft) from the entrance door, in an area that will maintain a constant ambient temperature between 10 ° C and 35 ° C (50 ° F and 95 ° F).
Executives in charge of facilities must also consider people flows and actual revenue volume. For entry to be effective, through a turnstile or in a busy access with a card reader, it is required that one person pass at a time without stopping.
To ensure a high level of precision and maintain adequate resolution in a thermal camera system, a two to four second interval is required between one person and another. Depending on the number of people to be monitored, camera systems can be installed in multiple entry rows for high-traffic environments; a blackbody camera can process between 15 and 30 people per minute.
Monitoring and system integrations should also be taken into account. Systems that offer a variety of options to monitor gait and alert the operator when a person with elevated temperature is detected offers executives much flexibility in response procedures.
Some systems can be configured to monitor a specific range of low and high temperatures. In this way, different ways can be established to alert personnel when temperature anomalies are detected: a bright and visible LED light can flash as a visual notification or it can be integrated with a loudspeaker to give audible alerts.
Thermal cameras can be integrated with a variety of solutions, including turnstiles, VMS platforms, and access control systems, to extend the monitoring capabilities of the standalone solution. When the thermal camera detects a temperature anomaly, it can automatically lock a turnstile to prevent the person from entering the building without first performing a second temperature check.
You can also send an automated contagion report to facilitate contact tracing through a VMS or access control platform.
As executives in charge of facilities adjust to this new normal in building operation and management in the times of COVID-19, technology will prove to be a valuable ally in safely resuming operations and reopening doors. to employees and visitors.
When properly implemented, thermal camera systems can assure building occupants that measures to ensure their health and safety are truly a priority, as well as providing valuable first-line defense against COVID-19 by helping to mitigate risks.