The Evolution and Cross-Industry Applications of Haptic Feedback: From Smart Devices to Medical and Industrial Systems

1.Introduction 
2.Consumer Electronics: The Revolution in Everyday Life
3.Intelligent Mobility: Safer and accurate on the Road
4.Medical and Life Sciences Precision At A Distance
5.Industry and Professional Fields: Digitalizing Skills and Efficiency
6.What Comes Next
7.Conclusion

Introduction 
What is Haptic Feedback
When you hit a button on your smartphone and there is that satisfying little click, that is haptic feedback in action. Haptic feedback and haptic interface are used as a general term for technology that simulates the sense of touch by mechanical stimulation. It falls into two major categories, force feedback (pushing back against the user's hand or fingers) and vibration feedback (sending rapid pulses through a device's surface).
The technology has developed a long way. In the early days,  eccentric rotating mass motors or ERM motors were used. These small spinning weights gave a buzzing experience. They were cheap and simple, but inaccurate. Then came the Linear Resonant Actuators or what is referred to as LRA motors. These are of a straight-line movement and react much faster. And they can make sharp and accurate sensations. Today, with the advent of piezoelectric actuators, the limit used to be further pushed. They use crystals that deform when an electrical current passes through them, and these can get very subtle and precise tactile signals.
Why does this matter? Haptic feedback does three things and they are important. First, it offers more immersion into digital experiences. Second, it accelerates the interaction process by verifying actions without having to look at a screen by the user. Third, it acts as an accessibility tool, assisting people with visual or hearing impairments, providing them with methods of interacting with technology by touch.

Consumer Electronics: The Revolution in Everyday Life
Advanced haptics are first experienced by most people in smartphones and wearable devices. Modern phones have horizontal linear motors below the screen. When you press a virtual home button, the motor fires and makes you feel like the actual click of a button. There is not a moving part under your finger but the sensation looks convincing.
Haptic Feedback also makes notifications smart. A phone can use different vibration patterns to provide you with information about whether or not a phone call is coming in, your alarm is going off or an app has sent a message. You can tell the type of alert by not even looking at the screen. This is a small but meaningful positive change in life.
Gaming & extended reality devices take haptics a farther higher. Modern game controllers are used adaptive triggers. When you pull on the trigger in a game, the motor is able to resist your finger to simulate drawing a bowstring or firing a gun. Each action feels different. This type of feedback makes games more physical and real.
In the case of VR and AR devices, haptic feedback vest​s and haptic feedback gloves go even further. They can simulate the weight of a virtual object or a surface texture. When a user reaches his or her hands toward a digital wall and touches it, the glove pushes back. This is the bridging of the gap between the virtual and physical world.

Intelligent Mobility: Safer and accurate on the Road
In modern vehicles, touchscreen systems have removed buttons in favor of physical touchscreen options. This is a cleaner and more flexible solution, but it will cause a problem: drivers will have to take their gaze off the road to make sure their input is confirmed. Haptic feedback solves this. When a driver pushes a button on the center console, a vibration will let the driver know that the action has taken place. There is no need for the driver to look. This helps to reduce distraction and increase safety.
Multi-function knobs and steering wheel controls are also recipients of haptics feedback. A virtual detent, the sensation of a slight click as you rotate a dial, gives drivers the confidence that they've rotated the control by precise one-step increments. This is important when adjusting volume, temperature or navigation settings while driving.
Haptics also has a direct contribution to driver safety systems. When the car detects they might be leaving the lane, the car can send a vibration through the driver's car seat , stronger on the side closer to the line the car is driving on. This is a faster and less disruptive solution than butting people with an audio alarm. On some vehicles, the accelerator pedal itself is also used as a feedback channel. If the driver pushes past a speed limit or goes into a mode of eco-driving, the pedal would push back a little. The driver has a physical indication without any audio or visual cue to alert them.

Medical and Life Sciences Precision At A Distance
In medicine, haptic feedback allows for impossible functionality. With force feedback systems, the robotic arms push back to the hands of the surgeon. The surgeon is able to feel the difference between soft and firm tissue, and feel if the surgeon's cut is meeting with resistance. This information is critical to safe and effective surgery.
Smart prosthetic limbs use haptics to comprehend touch again with amputees. Sensors in the prosthetic hands detect the grip force. That information is converted to a vibration or a pressure signal that's sent on to the user's skin. The user can then feel how tight a grip they are holding on to an object and adjust his or her grip naturally. This enables the prosthetic to feel more like a real limb.
Haptic feedback​ in medicine medical education is yet another space where haptics will provide the real value. Haptic feedback devices are used in surgical simulation systems to enable students to practice surgery on virtual patients. When the student performs an injection or incision virtually, the device pushes against him to simulate the feeling of skin and tissue. Students are able to practice hundreds of times, with no risk to true patients.

Industry and Professional Fields: Digitalizing Skills and Efficiency
In industrial situations, workers are sometimes required to operate machinery in surroundings which are too dangerous or too small for a human to directly enter. Teleoperation systems let a human user remoter controls a robotic arm from a safe location. With haptic feedback, the operator can sense the forces that are experienced by the robot arm. If the robot touches a surface the operator feels it. This makes remote operation much more accurate and reliable.
Professional simulation training is also based on haptic feedback. Pilots use flight simulators that shake and lead backward to create turbulence and aerodynamic forces. This type of physical feedback makes skills more quickly acquired, and saves on training costs.
In 3D designing, haptic styluses are used so that designer can "feel" their digital designs. By moving a stylus over the edge of a 3D model, as soon as the designer presses down on the style the device. Provider resists the movement and simulates the sharpness of the edge. This gives designers a more intuitive and accurate means of working in digital space.

What Comes Next
The future of haptic feedback technology is flexible and wearable. This kind of flexible altruistic actuator can be woven into fabric or applied to skin like a patch. This opens the door to "haptic skin"--a layer of tactile sensation going all over the body. Imagine if there is a suit on your whole body that will allow you to feel every surface in a virtual world.
Haptics technology is also coming to social interaction. There are researchers who are working on creating systems for remote handshakes and long-distance touches. A person at one city could squeeze a sensor device and their partner in another city would feel pressure on his or her own wrist or hand. This type of technology could help to change the way that people connect, despite the distance between each other.
Bestarsensor is working on making haptic feedback technology evolve from rudimentary vibration towards complex and nuanced tactile simulation. The company has a profound technical expertise that has been developed during years of research and development. Bestarsensor collaborates very closely with partners to understand their particular haptic needs and delivers customized components along with the technical support required to integrate them. Bestarsensor does not merely provide parts but gets involved in shaping what the upcoming generation of human-machine interaction feels like. By giving excellence hardware and open partnership, Bestarsensor is positioned as an important role link in the haptic technology supply chain.

Conclusion
Haptic feedback has come a long way from the buzz that was present on the old phone. It currently touches on surgery, driving, education, gaming and industrial work. As the technology of actuators advances and their form factors become smaller, haptics feedback will become a standard layer of every digital experience. Touch will cease to be a secondary feature. It will become an integral part of how humans will interact with machines and with each other. The digital future is more than something we see, hear, it's something we feel.