Automation sensors have been part of automation devices ever since automation was available to manufacturing. As time has passed and technology has contributed changes to automation sensors, the use and application of these devices has moved to a point of necessity because of the functions that they perform. Leading to the high demand for automation sensors and their associated abilities has been push to automation systems perform at high speeds with very great accuracy. There is a concurrent demand for automation sensors to be able to monitor the continuous motion of devices that are under pressure to produce. A close eye must be kept on the manufacturing systems and their operating components to make sure optimum production is achieved.
Sensors are primary for watching the health of components during everyday operations. If devices through mandatory, continuous use get out of tolerance, overall production can be effected. It is left to the sensors to “watch” and make sure that proper maintenance is done on devices to eliminate poor production output. High speed production has made this task of utmost importance because machinery wears faster than ever with ramped up speeds.
The ability of sensors is also important in the location of randomly scattered parts in various locations during production. Without the ability to “see” a pick and place robot would be useless in the manufacturing process. Having sight makes the associated automated devices extremely efficient as they max-out the production rate without missing a beat. Often sensing devices can offer safe operation as their main part in the production process. Light sensors can close or open safety gates for the intended part of protecting equipment and people from harm. In other cases they may be used to shutdown equipment to keep some disaster from occurring. In fact automation sensors pervade all parts of manufacturing from inspection, identification, assembly and part orientation. Sensors fulfill important tasks that cannot be done on a long term basis with accuracy by humans. These are the tasks that are physically demanding, boring, and cause excessive fatigue.
In the early stages of automation applications, sensors were manufactured as separate devices that could be added to the capabilities of automation to perform a function in tandem with other devices. As speeds of production have increased and the necessary use of sensors has grow, devices and sensors are becoming single units. An automation device that has a built-in sensor to assist in operation makes it much easier to implement an effective work cell that has built-in safety or “visibility” capabilities. There is no need for having to synchronize the sensor with the device it supports. Having several automation devices with embedded sensors can supply fully integrated information to controllers about the overall state of the health of the automation system in real-time. Having full information supplied continually to the controller about the health of equipment will make it much easier to schedule maintenance for any part of the system that is under scrutiny. This will reduce unscheduled downtime and optimize machine performance and allow for effective production scheduling.
Another growing area in the use of sensors is occurring in the use of RFID devices. The radio frequency identification that can be included in the labels of products makes the fine cost control that is needed in inventory management a reality. RFID gives a manufacturing operation the ability to know not only the exact amount of raw material it has in storage, but also it will make the exact location of that material evident. Having reorder points cut down to an exact amount allows the manufacturer to reduce overall inventory costs to a scientific level. Only the amount of raw material that is required for production will be available in the warehouse when it is needed, due to the precision of RFID in inventory control.
When a sensor is to be employed in production it is important to match the skill of the sensor with the requirements of production. Different sensors have very well-defined abilities, so making the match is important. This matching also extends over to the environment where the sensor will be required to work. The sensor must be able to work there or it could be ineffective. For the successful use of any automation sensor there must be the proper resources available for changing the programming of the device when this is needed. If a sensor is to be sued in several different automation applications this will be a critical part of keeping production up and running. If there are various changes of the requirements for the sensor, it might be necessary to have a programmer on staff who can make changes to programs in a timely fashion.
The increased abilities in production, and the accuracy of production will far outweigh the requirements of cost and effort to get sensors as part of the automation in a company. All functions that thee devices contribute will make the production of a company much more efficient.
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