MOTION SENSOR

Assignment 2: AUTOMATIC DOOR OPENER (KONE SD 35S)

Introduction

The kone SD 35S is a member of Kone SD group of Kone Sliding automatic door openers. It uses; manually operated Program activators which are push buttons and switches,safety sensors that ensures that the doors do not get in contact with the user, Entrance control system,wireless program switch and a remote control. Additional features such as fire alarm can be added

Working Specifications

The manually operated activators control; the automatic opening and closing,reduce opening width and sequence opening. It also has reset functions and maintenance indicator to notify when the door has reached its programmed number of cycles.

Safety sensors provide safety features such as electronic safety reverse,finger trap safety,photo cell safety, door speed safety and power failure safety .

Figure 1: A schematic of Kone SD 35s group of Automatic sliding doors

Working Principles

The sliding automatic door can either have a single or double doors opening. The doors open outwards from each other in double doors and left or right sliding in a single door setting.

The door uses the radar-based motion detector which is installed at a specific location just above the door which is a part of a wireless sensor network device.A wireless sensor network device is a device packed data collecting component which includes a sensor and /or an actuator,a radio stack,an enclosure,an embedded processor and a power delivery mechanism .The radar based motion detector box located just above the door frame sends out bursts of Radio Frequency(RF) beams or and then waits for the beams to be reflected back. The beams sent only covers a certain circumference and then bounce back to the source in the same pattern. When a person or an object enters the circumference in which the beams are shone,the reflection pattern is disturbed and the sensor send a signal and the door opens. But when there is no object in the path of the beams,the reflection pattern is consistent and the door remains shut.

The same setting can also be utilised In a security system ,instead the sensor sends an alarm signal when the reflection pattern in the room is disturbed.

Assignment 3:SENSOR CHARACTERISTICS

MP NaPiOn Motion Sensor:Area Reflective Type

This type of sensor emits infrared rays from an LED.The sensor sends out a ray of light towards the object or human body then uses the reflected light to measure the distance and determine whether there is a person within the given distance of the sensor. Using the reflection of the infrared rays,the sensor measures the distance to the person or object and detects whether or not it is within a specific distance. If the sensor detects an object in its line of sight, it sets an output non-contact switch to ON.

This kind of sensor is used in a wide variety of applications ranging from automatic indoor lighting systems , automatic air control louver system,On/Off smoke dispersal machine ,Automatic windmill machines,Automatic water faucets ,Automatic parking meter,Non-contact switch for the toilet and many other day to day applications.

Interface electronic:Current Amplifier

The motion sensor in Automatic door opener uses the current amplifier as one of its interface electronic device. In this section we are going to focus on the panasonic MP motion sensor ‘NaPiOn’. These are small,high performance infrared human detection sensors with a built in amplifier. It has ultra-small design,dual lens colours,digital and analogue output with adjustable sensitivity options to allow for flexibility is applications designs.

The sensors have a built in sensor element,amplifier and a comparator. The output from the sensor element has an extremely weak signal in passive infrared scheme and the signal has to be amplified and then converted to an ON/OFF signal with a comparator circuit before output

Figure 1. Rating of the Sensor

Figure 2. Different Types of NaPiOn Sensors

Figure 3. Digital Output of NaPiOn motion Sensors

Figure 4. Analog Output of ‘NaPiOn’ Motion sensor

FINDING MORE INFORMATION ABOUT NaPiOn Sensors [30-04-2015] :

1.Power Consumption

2.Materials used

The Area Reflective NaPiOn motion detector is developed by a proprietary technology for lenses,detector elements,Integrated circuits (IC’s) and mounting. It is made up Highly sensitive quad element with U-shaped slits around the four light-receiving units . It is also made up of Small multi-lens. With proprietary high precision molding technology, 16 short-focal point lenses with 5 different optical axes are integrated.

2.1 suitability of the material

2.2 Properties

[Presentation :slide docx template]

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References

1. KONE Automatic Sliding Door offering.2015. SD series

URL: http://cdn.kone.com/www.kone.fi/Images/kone-slidingdoors-technical-datasheet.pdf?v=2 [ONLINE]

Accessed 30 March 2015

2. How Stuff Works.2015.Motion Detectors

URL:http://home.howstuffworks.com/home-improvement/household-safety/security/burglar-alarm2.htm [ONLINE]

Accessed 30 March 2015

3. Dishong,Terrance J.,McGrath, Michael E.,Ben. 2009.