Comparison between laser interaction and radar interaction

  Comparison between laser interaction and radar Interaction , At present, radar is widely used in touch interactive projects in the market; It is concluded that the radar has some disadvantages, the installation is troublesome, the manual positioning is required, the accuracy deviation of touch control, the icon can not be triggered accurately, the refresh rate is low, the maximum is only 40 frames, and the ball smashing interactive games often miss the ball
Compared with these disadvantages of radar, easy to see laser touch technology can solve these problems
Laser touch has high frame rate, fast response speed, 2mm accuracy and 5S automatic positioning
The following describes the comparison between laser touch technology and radar touch technology:
 
1
  Two touch control principles:
Laser touch principle: the laser touch interactive module is simple in structure and consists of laser and camera
The laser transmitter is installed on any screen (projection screen, LED screen, LCD splicing screen, etc
), forming an invisible light film 1-2mm higher than the surface and about 1mm thick on the screen surface
When the finger or any opaque object contacts the surface, the light is reflected on the image sensor (camera) set above the screen, and then the coordinates of the mouse are obtained by calculating the position of the light point

Radar interaction principle: radar interaction is to use radar equipment to capture the actions of participants, then upload the captured actions to the phase system analysis, and then combine the analyzed data with the interactive system to finally produce an interactive effect, so that the participants can interact with the wall image

2
  Touch technology description;
The laser touch interactive module can be combined with the screen (such as projector, LED screen / floor tile screen, splicing screen, transparent screen, holographic screen, etc
) to turn the ordinary display screen into a large touch screen with high precision, large picture and no frame
It can be used in exhibition halls, exhibition halls, science and technology museums, art galleries, multimedia conference rooms, multi-functional teaching, new retail, children's entertainment, immersive interactive projection and other fields

Radar can also be used in combination with the screen, but based on the original intention of radar design, it is used for vehicle obstacle avoidance, which has poor accuracy and cannot interact with high accuracy; Unable to meet the writing requirements; Low frame rate: 15 frames for domestic radars and 40 frames for imported radars, and the triggering rate of missed ball will be low when smashing the ball; Installation, debugging and manual correction are time-consuming and laborious

Core advantages of laser touch:
Large screen: support 3 * 36m large screen and high-precision touch control; Immersive interaction
High accuracy: the touch accuracy reaches 2mm, which can reach the writing level
No border: the two sensors are only fist size and have no border

High frame rate: fast response
Automatic correction: it can be used after 5S automatic positioning
Multi screen touch integration: support 6-channel projection touch integration, which can form an immersive interactive projection experience

3
  Comparison of laser touch and radar touch parameters
 

	easy to see			imported radar	easy to see	domestic radar
name	F series	TX series	T series		P series
refresh rate	60fps	120fps	60fps	40fps	30fps	15fps
maintenance	automatic calibration once every 3 months	automatic calibration once every 3 months	automatic calibration once every 3 months	door to door calibration 1-2 times	automatic calibration once every 3 months	door to door calibration 1-2 times
positioning accuracy	2mm	1cm	1cm	2cm	3cm	4cm
failure rate	＜1%	＜1%	＜1%	lower	＜1%	High
multiple sets of splicing	support	support	support	not supported	support	not supported
original intention of R & D	designed for display interaction	designed for display interaction	designed for display interaction	designed for vehicle obstacle avoidance	designed for display interaction	designed for vehicle obstacle avoidance
height of sensing area	5mm from the screen	5mm from the screen	5mm from the screen	5-10cm from the screen	5mm from the screen	5-10cm from the screen
delay	70ms	50ms	70ms	100ms	100ms	140ms
cost	medium	High	medium	High	lower	lower
debugging time	5min, the laser has red light reference	5min, the laser has red light reference	5min, the laser has red light reference	30min	5min, the laser has red light reference	30min

4
Introduction to laser space interaction
  Using laser interaction technology and infrared laser pen can realize long-distance space separation and high-precision control; It can be used in conference rooms, multimedia exhibition halls, exhibition halls, science and technology museums, children's entertainment, immersive interactive projection and other fields
The product form can design different appearance according to the application field
It can support several meters of remote operation

5
Description of automatic positioning of laser touch technology
  It is a process of automatically calibrating the interactive picture through the image sensor (camera) of the laser interactive module
This process only needs to be completed in 5S; The interactive picture coordinates can be calculated by software and transmitted to the system
For specific operation, you only need to click the correction with one key, and the screen will automatically switch to the correction interface: the correction is completed in 5S, and touch control can be realized