Question
As president and chief engineer of Aqua (pronounced AquaNot) Aquarium Maintenance
Engineering, Inc., you have decided to develop an automatic device to control ....
As president and chief engineer of Aqua (pronounced AquaNot) Aquarium Maintenance Engineering, Inc, you have decided to develop an automatic device to control the acidity (pH) and calcium content of the water in fish aquariums. You also want to use this device to automatically feed the fish which are in the aquarium on a regular basis. This device has been made possible due to the recent development of inexpensive devices for the measurement of pH and calcium content, pC. You have decided to purchase these devices and use them as inputs to your system. The pH measuring device has an output (pH) which is asserted as a one (1) when the pH is too high requiring the introduction of a measured amount of buffering agent (B) into the aquarium to lower the pH The calcium measuring device has an output (pC) which is asserted as a zero (0) when the calcium content is too low requiring the introduction of a measured amount of calcium into the aquarium. . . Use the outputs of these two measurement devices as inputs to your Aqua not a prob aquarium controller to determine whether to actuate the output devices. .The first of the three output devices introduces a measured amount of buffering solution (B) into the aquarium to lower the pH of the water The second output device introduces a measured amount of calcium (C) into the aquarium to raise the calcium level. The simultaneous introduction of the buffering solution and calcium cannot be permitted since they may cancel the effects of each other . You have decided that pH control is more important than calcium control so that if both the pH and pC sensors indicate that the buffer and calcium must be introduced at the same time, you will only introduce the buffer into the water during that cycle. o There is, of course, a third output device (F which dumps food into the aquarium. Through experience you have found that you cannot put fish food in the tank at the same time you put any chemicals in the tank because the fish will swim through the areas of water which have toxically high concentrations of chemicals in order to get at the food. pC than to feed the fish. two feeding cycles, you must feed them rather than introduce either the buffering .Experience has also shown that, if possible, it is more important to control the pH and .It is well known that the breed of fish you have in your tanks can not miss more than agent or the calcium. You remember that this type of problem can be reasonably solved using a synchronous finite state machine of the Mealy type. It further seems reasonable that this can be done in three states where the first one (01) indicates that the fish were fed on the last cycle, the second (10) state indicates that the fish have missed one feed cycle, and a third (11) state which indicates that the fish have missed a second feed cycle. Draw a properly labeled and complete state diagram of the Mealy Machine to implement the Aqua not a prob aquarium controller
Explanation / Answer
Aquaclean Systems Of Atlanta is a family owned business. It began with a vision from Chris and Crystal Hardy to bring extraordinary aquariums, ponds, and fountains that are maintenance friendly and affordable to the Metro Atlanta area.
Chris worked for 3 years at a high end aquarium store in Buckhead in the early 1990s. At that time, multiple customers expressed interest in having the enjoyment of an aquarium, however, they did not want the hassle of the maintenance side of aquarium ownership. Due to these continued requests, Chris began doing aquarium maintenance in 1993.
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Towards the end of 1994, the owners sold the high end aquarium store and Chris left to start Aquaclean. Three days after being in business, Chris received a call from one of Atlanta's (and the country's) most well-known entrepreneurs expressing an interest in Chris's services. On that first day in January 1995, Aquaclean Systems of Atlanta was born. It has grown through referrals from other affluent and consciencious customers.
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Over the past 20 years, Aquaclean has expanded from only servicing to designing, building, and maintaning aquarium environments for top professionals and businesses in Atlanta and the surrounding areas.
Maintenance :
Once your aquarium, pond, or fountain is installed, maintenance must occur to keep it in pristine condition. A well set up installation will have better performance and less maintenance time needed. This in turn will save you money throughout the coming years. With over 20 years in business, we have the knowledge and experience to create and maintain an eye catching aquatic scape. This equates to better health of your livestock and less time needed for professional maintenance. Using proper equipment and nutrients, we will bring you a top quality system with the least amount of maintenance required.
