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Client: Monluo County is located in northwestern Mississippi, with an area of approximately 764 square miles, a population of more than 37,000, and a residential density of approximately 22 per square mile. According to state-level and county-level laws, the county government must collect all garbage placed on the roadside by residents and charge corresponding service fees. Menglu County has used manual methods to collect garbage bags in the past, but after studying the automated collection system, the county chose LaBrie Environmental Group to deploy a test system that uses five trucks to cover 8,500 homes. LaBrie Group cooperated with Cascade Engineering Company to jointly develop a set ofImpinjProvide technical support RFID solutions.
Challenges: The challenges faced by the staff responsible for garbage collection are:
> It is difficult to accurately determine which house the garbage comes from and charge it
> Confirm that the garbage has been collected to avoid duplication of work
> Make sure that the truck is on the road on time and avoid returning the truck to forget to throw it out on time
Garbage customers collect garbage again
> Determine whether the garbage thrown by customers exceeds the quantitative limit
> Track their valuable assets (trash can)
In the southern states, the government’s garbage collection work will also encounter another problem-temporary residents from the north to escape the cold winter. In winter, garbage collection takes longer than in summer. However, due to the lack of an accurate way to judge the garbage producer, it is difficult for the staff to charge the residents the correct fee.
In order to overcome these difficulties, equipment manufacturers have tried many methods. One way is to use a barcode on each trash can. The garbage collection staff can individually identify each bin and associate them with each residence. The truck driver uses a scanner to scan the bar code of each bin when collecting garbage. However, barcode operation has high requirements for visibility. If the weather is bad, or the barcode is covered by sludge, or the customer places the trash can in the wrong direction, the scanning accuracy cannot be guaranteed. Another method is to use a global satellite positioning (GPS) system to install sensors on the truck’s trash can lift arm to confirm that the trash can at a specific location has been emptied. However, in urban and semi-urban areas with very dense residential areas, it is difficult to accurately map trash bins to customers one-to-one. The staff also tried taking pictures. Although it is easy to take photos, managing them is another big hassle. It is difficult to accurately correspond the photos to the location in the office, and it is difficult to provide services to customers in a timely manner. In order to solve the various problems that exist, the manufacturers of garbage collection equipment are turning their attention to RFID technology.
Tried otherRFID readerLater, the Labrie/Cascade team chose Impinj’s Speedway® reader because of its superior performance, high reliability, and lower system costs. Certain features of Speedway Reader are essential to garbage collection applications. These features include:
> Read zone control. The ability to control the reading area enables more diverse antenna layouts. It is too dangerous to place the antenna in the body of some trucks, so it is necessary to place the antenna on the side of the body. However, the antenna in this position sometimes misread the label of the trash can placed on the ground. The unique reading area control function of the Speedway reader can control the reading distance of the antenna within a small range, and only read when the trash can is in a suitable position.
> Rugged mechanical design. The robust housing of the Speedway reader makes it extremely resistant to shocks. Other readers require additional protective housing, but doing so will cause the reader to overheat. Speedway’s rugged design does not require any additional protection, reducing costs for manufacturers of in-vehicle systems, while being more reliable.
> Best sensitivity. Speedway reader relies on its outstanding sensitivity andantennaThe port design requires only one antenna to complete the work well, while the readers of competing brands need two antennas. This advantage can also reduce the overall system cost.
With Impinj’s support, Labrie/Cascade took only one week of engineering time to integrate RFID technology into their system. At present, Menglu County has a fully operational RFID waste collection and testing system, which covers 8,500 houses and has received significant results. The county has found 650 customers who have never paid for the service. As the RFID system is deployed in the remaining residential areas, more similar customers should be found. Another advantage of the RFID system is that trash cans can be tracked.
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