The requirements for the lighting of a tunnel are determined by the properties of the human eye. The detectability of vehicles and obstacles depends on both the lighting and the reflective properties of the road surface and the tunnel walls.
Tunnel lighting shall be controlled in such a way that drivers can safely approach, pass through and exit the tunnel both during the day and at night. Especially when entering the tunnel, a driver must be able to detect obstacles in time and stop.
The luminance describes what people perceive as brightness and is therefore the decisive control variable for tunnel lighting.
The environment to be measured is set via a lens in the luminance camera. Light from this environment hits the camera's photo element, which then calculates the luminance and outputs it via the analogue outputs.
The flow meter ACP TK 300 uses ultrasonic technology to detect the flow velocity and flow direction. One measuring unit consists of 2 transmitting and
1 receiver sensor.
The measurement is carried out point by point on the tunnel wall and remains unaffected by traffic and air turbulence, as only the flow in the longitudinal direction is recorded and the signal is not interrupted by stationary traffic, for example. Thanks to the fixed arrangement, the geometry is clearly defined, which considerably simplifies installation and commissioning.
The measuring head has no moving parts and has a degree of protection of IP 67. The measuring device requires only minimal annual maintenance. The measuring heads are arranged laterally on the tunnel wall, whereby a measuring point consists of 2 measuring heads. The evaluation takes place in a control unit CDU. The measured value output can be selected from the 2 individual values or an average value via the two measuring heads.
exist. An averaging time can be set as desired.
The ACP/VisGuard measures the scattered light intensity of an aspirated sample inside the instrument. Filtered purge air surrounds the sample stream and effectively prevents contamination or drift.
Devices are supplied either directly in the driving compartment or in a niche (in-situ) or with extractive sampling and installed away from the passenger compartment. An optional heater eliminates the influence of mist or spray.
The ACP/FireGuard detects developing fires at an early stage (cold smoke).
The sensor uses the natural, existing air flow in the tunnel. The influence of fog is eliminated by the optional heating elements.
The sensor is very compact and has neither moving nor wearing parts and requires no consumables. An economical LED serves as the light source. A universal bracket allows mounting on the wall, in the arc area or on the ceiling.
Special models for installation in the false ceiling or directly in the ventilation flap are available. Different connection types allow flexible system integration. Individual parameterisation enables the optimum object and location-related alarm setting, there are no false alarms. A contamination monitoring informs about the device status.
The ACP/FLOWSIC200 is used for non-contact and accurate measurement of flow velocity
and flow direction in tunnel tubes or exhaust air ducts.
The ultrasonic measuring method provides the average value of the speed over the entire tunnel width. In the case of climatic and traffic-related air flow, the measuring device is indispensable to ensure efficient and cost-effective control of tunnel ventilation.
Even in the case of fires in tunnels, a reliable, accurate and representative measurement of the flow velocity and direction over the entire tunnel width cannot be dispensed with today.
This is the only way to measure the spread of smoke and obtain the necessary information for optimal ventilation control.
The brightness sensor measures the brightness in the outdoor area. The brightness is converted into an analogue measuring signal in 4..20mA.
This signal can be recorded e.g. with a PLC and used further depending on the function. The sensor requires only two terminals for the 4...20mA signal.
Inside the sensor has a dip switch where you can set the measuring range.
The sensor does not contain any operation. If possible, the lens of the sensor can be wiped with a damp cloth each time the tunnel is cleaned.
As a full-range supplier of tunnel sensors and traffic measurement technology, ACP supplies the ACP/VISIC50SF, a compact smoke detector for early and reliable smoke detection.
As a compact smoke detector, the VISIC50SF is particularly characterised by very simple installation and fast commissioning.
The VISIC50SF measures immediately after switching on, because it is already pre-set at the factory.
This reduces preparation at the measuring point and commissioning to a minimum.
As a full-range supplier of tunnel sensors and traffic measurement technology, ACP supplies the ACP/VISIC100SF, a compact tunnel sensor for measuring visual opacity and carbon monoxide (CO) as well as nitrogen monoxide (NO) or nitrogen dioxide (NO2).
As a compact tunnel sensor, the VISIC100SF is particularly characterized by very simple installation and fast commissioning.
Time-consuming alignment of several device components and parameterization are a thing of the past. VISIC100SF measures immediately after switching on, because it is already preset ex works.
Thus, the preparation of the measuring point and the commissioning are actually reduced to a minimum.
The ACP VISIC is a detector that can measure different weather conditions (fog, snow, rain - depending on the temperature).
This product is used specifically for various roads and highways.
The detector is protected in a metal housing IP65. The microprocessor is equipped with different versions that can be used for highways.
The F-LASER is a linear heat detection system specially designed for fire protection applications.
It can measure temperature profiles at thousands of points simultaneously, all along a sensor cable that can be up to 4 km long.
In fire protection, the F-LASER, can not only determine the position, but also determine the course of the fire thanks to the temperature sensors along the cable.
The fiber optic cable offers several advantages thanks to the measurement medium. Signals are immune to electromagnetic interference, consequently the integrity and the precision of the measurement are always
reliable, even if, for example, in areas power cables and transformers are.
Since no electrical current is used in the fiber optic and the fiber is a relatively inert and dielectric (non-conductive) medium, this is a safe technology for use in hazardous environments. (Please consult with the manufacturer). In the first picture, two different fire alarm cables are shown: the first with with metal conduit and stranded wire, PA or FRNC jacket, the second with PA conduit and aramid yarn, PA or FRNC jacket.