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Sensor of library automatic book borrowing process
目录:New发布时间:2021-11-12 21:24:03点击率:684
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Leuze electronic sensor is helpful to the automation of book borrowing process in modern library
In large libraries, self-service dominates everything from check-out to return. But few users stop to think about how to classify the returned media. In this regard, rislow telelift's flexible transportation system and Leuze electronic's sensors provide an automated process.
The German National Library in Leipzig provides nearly 25 million media to its users. Every day, thousands of mobile phones are used, Lent and returned. Such a large number can only be handled through automated processes. In addition, the need for fast access time, shorter paths and more economical processes is true not only in the German National Library, but also in Jacob and wunelm Grimm zcunm of Humboldt University (Grimm Library) in Berlin and the Berlin State Library.
Swisslog telelift's transportation solution has made an important contribution in these large and well-known libraries to ensure accelerated order processing and eliminate manual transportation tasks for personnel (figures 1a and 1b). Highly automated operating procedures can avoid unnecessary waiting time at loading and unloading points. Leuze electronic is required to provide a reliable and highly integrated sensor solution (Figure 2). J ö RG Franke, project manager of telelift light cargo transportation system in reslow, believes that the benefits of this are obvious: "returned books can be provided again faster. This brings real added value to users. There is no doubt that this is a high-quality function of the library."
Experts in light transport technology
Headquartered in pushheim, Bavaria, Swisslog telelift is part of the Swisslog group and a leading manufacturer of conveyor systems for internal transportation of light goods and documents. In addition to rail transport systems, the manufacturer also produces driverless transport systems with a maximum capacity of 500 kg.
In the Library Department, the company is responsible for the whole logistics process, from book return to sorting, and then to target transportation to the library. All Swisslog telelift transportation systems can be integrated according to the individual requirements in the standard self-service borrowing logistics system used by the library, that is, even in the customer terminal of media detection and return (Figure 3). J ö RG Franke described the service portfolio: "we develop and manufacture modular systems for almost all requirements and provide customers with all services from design and planning to construction and startup. In the field of sensor systems, we have successfully cooperated with experts from Leuze electronic for a long time."
Multi lift with Leuze electronic sensor system
Two large libraries in Berlin, the University Library and the State Library, and the German National Library in Leipzig, implemented solutions during renovation work to allow books to be transported to their intended locations in non driven transport boxes ("vertical conveyors") on conveyor systems and elevators. The "multlift" system is used in these applications. This basic technical concept of Swisslog telelift mainly includes conveyor belt sections and roller conveyors for horizontal transportation in building floors, as well as fully automatic container elevators for vertical transportation between building floors (Figures 4 and 5).
A Book transport container with a maximum capacity of 25 kg is used to transport media. The multi lift system operates through the direct destination control device (Figure 6). J ö RG Franke explained how it works: "The transport destination is set on the code carrier directly on the transport container. These can be slider coding strips or rotary coding discs. The non-contact destination query performed by the Leuze electronic BCL 34 barcode reader detects the destination setting at all decision points of the transport system. Therefore, the container can reach the destination quickly and reliably." In the green library in Berlin, Leuze electronic's rotary coded disc is used (Fig. 7). With these, you can quickly and easily set the code manually through the rotation action. In contrast, the slider code bar used by the National Library and the German National Library provides unlimited "nesting" functionality (Figure 8). This means that containers can be stacked optimally horizontally. "This saves a lot of space, for example, in the German National Library, about 350 containers are used," said J ö RG Franke
Data transmission via PROFIBUS
The barcode reader is equipped with an integrated PROFIBUS interface. This eliminates the need for PROFIBUS gateway and RS-232 components and greatly reduces the cost of the whole system. The BCL 34 barcode reader reads the manually preset code on the slider code bar (Fig. 9) and transmits the data directly to the control device via PROFIBUS. In this way, the destination of each detected container can be accurately identified. The barcode reader supports a maximum signal transmission rate of 12 MBD.
The equipment is programmed directly with the software tools of PROFIBUS master, that is, no other tools are required for configuration. If necessary, the barcode reader can be replaced within a few seconds without any special technical knowledge. The Profibus diagnostic tool can directly query and monitor the status of bcl 34.
Distance measurement in elevator
In order to improve the transport capacity and overcome the transport height between the building floors, the Berlin national library uses a continuous container elevator with a function similar to paternoster. On the other hand, in the green library, linear elevators are used to connect the eleven floors to each other. The multi lift system TEM fully automatically loads and unloads during upward and downward movement. In this process, after each loading and unloading operation, the door is automatically and reliably closed by the motor.
For the vertical movement of the container in the elevator, the control device uses the signal provided by AMS 200 laser ranging equipment from Leuze electronic. With these devices, signals are also transmitted via PROFIBUS. Due to the integrated interface, they can be easily and economically integrated into the Profibus network. The sensors achieve an absolute accuracy of + / - 2 mm at a measurement distance of 120 M. Due to the extremely fast position calculation speed in the equipment, the high dynamics of modern driving technology can give full play to its potential (FIG. 10).
AMS 200 ranging equipment improves system safety by using pre fault information. Through these warning signals, the equipment timely informs the user that the performance of the laser diode is degraded, the temperature is not allowed or the optical elements are dirty. Early warning and subsequent maintenance work provide additional reliability and AVA repeatability.
Good results from the beginning
In conclusion, the technical alliance between Swisslog telelift and Leuze electronic ensures that library visitors can quickly obtain books at the check-out / return terminal and easily return them again after reading. By using the type of automation described here and networking control through PROFIBUS, books can be used in a few minutes, and even remotely in multiple buildings and several floors. This should make future readers happy, even with this technology
Use of products
AMS 304i optical ranging system
Barcode reader
Industry / field
Material handling
task
Bar code, control engineering, positioning
application
Sensor of library automatic book borrowing process
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