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Thursday, October 1, 2020
WORSHIP SURVEILLANCE DETECTION
Tuesday, September 15, 2020
ACTIVE INFRARED PERIMETER SENSOR
ACTIVE INFRARED PERIMETER SENSOR
Perimeter sensors use infrared (IR), passive infrared (PIR) or light-detecting sensors to monitor your surrounding property. When movement is detected by these sensors, they can send notifications to your alarms or security system so you instantly know when someone is approaching.
An infrared (IR) sensor is an electronic device that measures and detects infrared radiation in its surrounding environment. Active infrared sensors both emit and detect infrared radiation. Active IR sensors have two parts: a light emitting diode (LED) and a receiver.
Active Infrared (IR) Fence Detectors, or Photoelectric Infrared Fence Sensors have been widely used in perimeter security systems. Unlike the electric fence, the Active Infrared fence detectors utilize invisible Infrared barriers to detect the intrusion. It has long detection/guarding range, low-cost, high-quality, and installation-friendly features. Some IR fence detectors adopt 4-channel frequency design to avoid IR interference between different beams, this can greatly reduce the false alarm rate to offer you accurate motion detection.
Some Active IR Fence Detector product portfolio includes 2∼10 beams, and detection range reaches up to 5m∼40m. These photoelectric fence sensors have N.O. and N.C. alarm output, can work with difference systems through reliable wired connection. It's the ideal security detectors for your intrusion alarm system, access control system, IP surveillance system and home automation system.
1# How active infrared fence detector works?
Each
Active Infrared (AIR) sensor comes as a pair, consisting of a transmitter and
receiver. IR transmitter emits multiple Infrared light to the receiver, this is
the working principle of AIR sensors. The transmitter and receiver are
installed opposite each other, the area between the transmitter and received
has been guarded by invisible IR-beams. When a person or object crosses the
IR-beam, the infrared beam is interrupted. The receiver triggers alarm and send
alarm signals.
AIR
fence detectors use an active infrared technique, it provides much accurate
motion detection than PIR-based detectors. Additionally, the fence sensors use
the pulsating code to filter out interference light sources from sunlight,car
headlights and lightning flashes. The fence receiver only reacts to
interruptions in this pulsating infrared beam, other light sources therefore do
not affect the receiver. Our active Infrared fence detectors emit IR in 4
different frequencies to make it difficult to be replicated and interfered.
2# How to choose right AIR fence detectors?
To
choose the right active infrared fence detectors, you need to consider the
following two things; the number of beams, the detection range. Most active
infrared beam detectors have 2, 3, 4, 6, 8, 10 beams. The more the number of
beams, the higher of the detector's height. Typically, 2∼4 beams
fence detectors are suitable for covering single window and door. 6∼10
beams AIR fence detectors fit the application of balconies and windows and
doors in the array.
Active Infrared Fence
Detector Installation 1
AIR Fence Detector
Installation 2
Detection coverage/range is the another very important factor when choosing the detector. Unlike other detectors, the installation distance between the transmitter and receiver should be the exact/approximate same rated detection distance of Active Infrared fence detectors. This means if the detection range is 20 meters, users need to choose 20 meter Active IR fence detector, not the 40 meters product. However, the Active IR detectors allow users to adjust the intensity of Infrared light to change the detection distance.
3# How to connect the AIR fence detector?
Both IR transmitter and receiver requires power supply (10.5
- 15V DC) to operate. However, sync connection maybe required for the long range
detection. When connecting the AIR fence detector to alarm systems, EOL
resistor (2.2Kohm) connection is mandatory to supervise the circuit.
Note: In order to avoid false alarm caused by power
failure/electricity outage, it's recommended to use UPS power supply.
Note: If the controller is an alarm panel, EOL resistor (R1) should be used, it should be connected in series to protect and supervise the circuit. Other controllers don't need to use EOL resistors.
Tuesday, September 1, 2020
India and China relation effect in Surveillance Market
India and China relation effect in Surveillance Market
India faces trade imbalance heavily in favour of China. The two countries failed to resolve their border dispute and Indian media outlets have repeatedly reported Chinese military incursions into Indian territory. Both countries have steadily established military infrastructure along border areas.
Major Issues Between India And
China
- LAC issues – Border demarcation has been a major issue between India and China. ..
- Water Disputes – The 4 Rivers flowing from China to India are the crucial source of water for some Indian states. ...
- Dali Lama – India's step to shelter Dalai Lama, who has taken shelter in Dharamshala, after his exile.
According to Indian sources, melee fighting on 15/16 June 2020 resulted in the deaths of 20 Indian soldiers (including an officer) and casualties of 43 Chinese soldiers (including death of an officer). ... On the Indian side ten soldiers were reported to have been taken captive while the Chinese numbers remain unconfirmed.
“We will make it mandatory for all bigger organisations to share CCTV footage. We will set up a control room where our industry department will monitor this feed to ensure that the social distancing norms are being followed,” said additional chief secretary and GMDA chief VS Kundu. Besides this, officials from the labour department as well as Haryana State
Industrial Development Corporation (HSIDC) will constantly monitor the factories. “We will also form teams of volunteers who will conduct random checks at the industry premises to see that the SOPs are being followed,” said Kundu. You need to audit video footage what your camera saw. As far as the construction sites are concerned, only those projects that have made arrangements for the workers’ accommodation at the site will be allowed to reopen.
China alone in 2019 accounted for approximately 90% of the worldwide production of video surveillance camera units, and its domestic surveillance market represented 47% of worldwide global market revenue, Omdia estimates, as shown by the chart below.
Sunday, August 16, 2020
Why UL listing important
- UL 60950: Is the most common for cameras, and applies to low voltage safety (ie: non combustibility)
- UL 1492: Audio/Video Products and Accessories
- UL 1995: Heating and Cooling Equipment
- UL 2802: Tests related to performance quality of Camera image quality.
- UL 2043: Standard for Fire Test for Heat and Visible Smoke Release for Discrete Products and Their Accessories Installed in Air-Handling Spaces.
- UL 60065: Audio, Video and Similar Electronic Apparatuses: Safety Requirements.
- UL 325: Safety standard for door, drapery, gate, louver, and window operators and systems. Specifically, it applies to electric operators for doors, draperies, gates, louvers, windows and other opening and closing appliances rated 600 volts or less.
- No UL listing required: Some municipalities are extremely lenient, never checking any product for UL certification.
- Ceiling-mounted products: One of the most arbitrary requirements we have seen is that all ceiling-mounted equipment must be listed, but no other parts of the system were checked.
- High-voltage only: In other cases, only high-voltage products require UL listing. This means that electricians are required to comply, but low-voltage security equipment is exempt.
- Strict, 100% listing: In the most extreme cases, the building inspector will require every last part of an installation to bear the UL mark, whether it be servers, cameras, cable, or any other components.
- Replace the non-compliant product with compliant. This is often the simplest way to gain compliance. The major downside is, of course, that product must be removed and replaced, incurring additional material, shipping, and labor costs.
- Contract UL to provide a one-time certification of the system of the whole. In this case, a UL engineer visits the site and performs testing of the system in place. While this may alleviate listing issues, it is extremely expensive, commonly in the $10,000+ range for even small installations. It is therefore considered a last resort.
Qualified monitoring stations will undergo an audit during each calendar year by our audit staff in order to verify continued compliance. Such audits will assess both the monitoring station facility and the delivery of services to subscribers who have been issued UL monitoring certificates.
The managed video service provider has personnel located at a managed video monitoring station in order to:
- View video streams
- Make informed decisions
- Interact with people or systems at a protected property
- Notify identified parties of events
Saturday, August 1, 2020
Chinavirus infection control in existing building design
Figure 2: Bipolar ionization generators create positively and
negatively charged oxygen ions, which bind to contaminants in the indoor air.
Courtesy: Lance Schmittling/Henderson Engineers
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- IEC 80601-2-59:2017 Medical electrical equipment — Part 2-59: Particular requirements for the basic safety and essential performance of screening thermographs for human febrile temperature screening
- ISO/TR 13154:2017 Medical electrical equipment — Deployment, implementation and operational guidelines for identifying febrile humans using a screening thermograph
- ISO 80601-2-56:2017 Medical electrical equipment — Part 2-56: Particular requirements for basic safety and essential performance of clinical thermometers for body temperature measurement