Inertial devices, American space defense projects and advanced precision strike weapons should be used.
A cantilever beam (treated by nanotechnology) and an inertial body. It's kind of like a gyro.
The alarm for automobile and motorcycle is a spring welded on the piezoelectric ceramic piece on the electronic clock and sound greeting card, and there is a counterweight at the end of the spring, which is the vibration sensor.
If you have the ability to recognize posture, it's expensive.
For example, the airbag of a car sometimes fails to open after a car accident, which is the problem. This is the problem of your inaccuracy.
Everyone knows that inertial technology and gyro theory are very mature, but the process is very difficult, and there is always a gap from the expected value of precision strike weapons.
Americans are always talking about the hit error probability and accuracy of his missiles, guided weapons, unpowered guided weapons and guided ammunition fired by ordinary guns, which is to show off his precision machining ability. The actual physical strike capability can never be calculated by a personal computer.
Neither can Bill Gates.
You should accurately detect that people are running, not cheating. It's normal to spend hundreds of thousands, the size of a fist. It is possible to design and use a large number of foreign production equipment according to your requirements for tens of dollars, and it is quite difficult.
With steel balls, the effect of numerical processing is achieved. It is parameterized and realized by physical structure. If you want a single-chip operation, power consumption, size and price, you will not be able to compete in business. You still ask such a professional question, and the average master of science and engineering students in China can't do this. It will be more troublesome to have a coordinate transformation first.
Inertial devices made in China can't be used in toy helicopters and cars. Others are cheap and have high precision.
It is more meaningful to find books on inertial technology and guidance technology when you have time than military forums.
The American two-wheeled parallel car and the SW that George W. Bush gave to Japanese Prime Minister Koizumi are typical representative products.
A few years ago, I read all the documents related to inertia keywords in the public documents of China patent application, such as the dynamic tilt measurement of automobiles and the judgment of the safety state of tower cranes, all of which are based on inertial components, and it is impossible to get an ordinary pendulum. The incense ash universal joint in the history of our country has been used in some mechanical gyroscopes, so the actual control and algorithm are completely different.
So farmers and workers in China build airplanes and submarines, but they haven't involved engines, avionics, autonomous routes and so on.
You must read books, have skills and be indispensable. Theory, technology and innovation are interdependent and complementary.