Analysis of three design schemes of interactive floor screen system

The interactive floor screen is an applied branch of the LED display field. The product is widely used in stage displays, commercial applications, shop decorations, and other directions through innovative design. The emergence of interactive floor screens provides a more novel expression method for various performance creative designs and is a useful supplement to current display equipment. With the increasingly prominent issue of product homogeneity in the LED display market, the emergence of interactive floor screens provides a reference for innovative LED applications in my country, and interactive floor screens have a promising market prospect.

Before the emergence of interactive floor screens, similar products on the market luminous floor screens were also used in commercial decoration and other aspects. Luminous floor screens can display patterns. Such luminous floor screens generally rely on the built-in single-chip microcomputer to control and display simple patterns or can be controlled by connecting a computer so that the entire stage can display changing effects, but these patterns or effects are preset in In the single-chip computer or computer, the control output is purely based on the program, and there is no interaction with the people on the stage. With the development of touch technology in recent years, luminous floor screens that can interact with people have appeared, and their novel and interesting experience methods are favored by the market. The realization principle of the interactive floor screen is to set an alight sensor or capacitive sensor or infrared sensor on the floor screen. When a person interacts with the floor screen, these sensors sense the position of the person and feedback its trigger information to the main controller, and then The main controller outputs the corresponding display effect after logical judgment.

Common interactive floor screen control methods include: the offline control method, Ethernet online control method, and wireless distributed control method. For different engineering applications, we have produced corresponding floor screen products and designed matching effect production software. Using the software “Seekway Dance Player”, The user can control the floor screen to enter the interactive mode of different patterns (the function of sensing patterns and sensing sound effects can be realized separately or at the same time) or as a screen to play full-color images. Multiple sets of gorgeous built-in effects can be generated with one key, and different format effects can also be intercepted or imported; with powerful text-editing functions, text effects can be edited as needed; brightness and speed can be adjusted in real-time, and brightness and speed can be flexibly adjusted according to the application; users can also carefully set or modify engineering parameters and wiring through installation settings, which is simple and fast.

Offline control and Ethernet online control mode interactive floor screen control system are composed of multiple subsystems, each subsystem includes a sensor detection unit, LED display unit, detection processing unit, and display control unit evenly distributed on the circuit board. The sensor detection unit is connected to the input end of the detection processing unit, the LED display unit is connected to the output end of the display control unit, and a data processor independent of the subsystem is also provided, and its output interface is connected to the input interface of the display control unit of the subsystem. The input interface is connected with the output interface of the detection processing unit. In the actual product, each subsystem is a floor screen module. When connecting, the subsystems are connected in series through the communication interface and the data processor.

It only needs to be connected to one of the subsystem communication interfaces. The purpose of this design is to make the wiring easier.

When the offline control mode is adopted, the offline controller functions as a data processor. On the one hand, it needs to receive the information transmitted back by all the sensor detection units, and after data fusion processing, the position of the triggered floor screen can be known. Then read the data files stored in the CF card, SD card, and other mobile storage devices to realize the corresponding effect display. The design of the offline controller is composed of a single-chip computer with strong data processing capability and its peripheral circuits.

When using the Ethernet online control mode, the calculator functions as a data processor. Because the computer has more powerful data processing capabilities, this control method can modify the display effect at any time and can realize unified monitoring of the large stage in real time. Modules can be expanded in a cascaded manner, which has huge advantages in large-scale interactive floor screens and screen engineering applications.

The interactive floor screen system design method is based on wireless distributed control, compared with the previous system design, the control method works in a wireless manner, eliminating the trouble of on-site wiring.

At the same time, using distributed control, the work of the data processing part is distributed to the control processors of each floor screen. The data processing part is completed by these processors. Therefore, the main controller part does not require strong data processing capabilities. In large-scale applications, There is no need to use a computer as a data processing center. This control method can greatly reduce the cost of system design.

The working process and principle of the wireless distributed control floor screen system are described as follows:

After the sensing point of the floor screen is triggered, the sub-controller connected to it will wirelessly send the location ID information of the trigger point to the main control; After the main control receives the location information, it synchronizes the location information to all sub-controllers by broadcasting; The sub-controller will transmit this information to the processor inside each floor screen, so each floor screen module will automatically calculate the distance information between itself and the trigger point, and then determine the display effect that it should display; The entire system will achieve a unified time reference through a special synchronization frame, so each floor screen module can accurately calculate when it should display the corresponding effect, and then can achieve the seamless connection and perfect display of the entire trigger effect.

Summarize:

 (1) Offline control mode, due to the limited data processing capability of the main controller, is mainly used for desktop interactive induction, suitable for relatively small applications such as bar counters and KTV room countertops.

(2) The Ethernet online control method can be applied to large-scale stage control and other occasions. Because the computer is used as the data processing center, this control method can easily modify the display effect at any time and can realize unified monitoring of the large-scale stage in real time.

(3) The wireless distributed control method is different from the above two wired data transmission methods. This method realizes key data transmission through wireless. In actual engineering applications, it not only improves the efficiency of on-site layout but also reduces labor costs and wire costs, which have more obvious advantages in large-scale applications.

At the same time, in terms of data processing, it is different from the above two centralized processing methods. The wireless distributed control method distributes the work of the data processing part to the control processors of each floor screen, and these processors cooperate to complete the display of the effect. Therefore, the main controller does not require strong data processing capabilities, and it is not necessary to use a computer as a data processing center in large-scale stage applications, which can further reduce the application cost of the overall system.

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