CHAPTER 1: PENDERIA & PENGGUNAANNYA
1.6 PENGGUNAAN PENDERIA DALAM INDUSTRI
FOUR(4) SENSOR APPLICATIONS CATEGORIES
1. SAFETY/HAZARD MONITORING
2. INTERLOCKING
3. QUALITY CONTROL
4. OBJECT POSITIONING
1. SAFETY/HAZARD MONITORING
The use of sensors to indicate conditions or events that are unsafe or potentially unsafe.
Objectives:
To protect human
To protect equipment
SAFETY/HAZARD MONITORING :
Example: THREE (3) SAFETY ZONES IN ROBOT WORKING AREA (FIGURE 1.62)
ZONE IDENTITY
LEVEL 1(Green):
Name: Perimeter penetration
Function of sensor: To detect an intruder has crossed the perimeter boundary of the work cell without regard to the location of the intruder.
Security feature: Fence surrounded with sensor(FIGURE 1.63).
LEVEL 2(Yellow):
Name: Intruder detection in the workcell
Function of sensor: To detect the presence an intruder in the region between the workcell boundary and the limit of the robot work volume.
Security feature: Pressure sensitive floor mat (FIGURE 1.64).
FUNCTION: To sense the weight of someone standing on the mat
LEVEL 3(Red):
Name: Intruder detection inside the robot work volume
SENSOR TYPE:Close proximity sensor
FUNCTION: To detect the presence an intruder and executing a strategy for avoiding collision(FIGURE 1.65).
2. INTERLOCKING
A method of preventing the work cycle sequence from continuing unless a certain condition or set of conditions are satisfied.
Example 1: Process in Figure 1.66
Example 2: Process in Figure 1.66(b)
3. QUALITY CONTROL
Using sensor to determine variety of quality characteristics.
Applications:
Inspection and testing
INSPECTION
Involves checking the product in relation to non-functional design standard.
Verify the physical dimensions (eg; area, length, diameter etc.
TESTING
Involves the functional aspects of product;
Example:
Testing to ensure that the product operates properly.
Fatigue testing
Environment testing, etc
4. OBJECT POSITIONING
To determine the positions and other information about various object in the workcell.
Position of;
Workparts, fixtures,people, equipment
Other object information
Orientation, color, size etc
