What is the difference and relationship between Bluetooth and infrared

The infrared transmission speed is not as fast as Bluetooth, which can reach 20 30kb s;

Infrared transmission is a straight line, and the transmitted data can not have any obstacles between the two infrared ports, and keep it at a distance of 8 cm 1 meter, and the angle can not be too large, otherwise it cannot be transmitted;

The transmission distance of Bluetooth is up to 10 meters without solid obstacles, and no angle is required, as long as it is kept within 10 meters, it can be transmitted, and no straight line (with penetration) is required.

Infrared is relatively cheap, the adapter is generally 50 100 yuan, and the technology is mature and widely used;

Bluetooth is much more expensive than infrared, the adapter is generally 100 200 yuan, a new technology in development.

Bluetooth uses frequencies to transmit data for electromagnetic waves.

Infrared uses higher frequency infrared waves to transmit data (higher frequency is visible light), the most obvious is that their carriers are different.

According to the characteristics of the waves, the diffraction phenomena of different waves are different, which also causes their penetration to be different.

Of course, the protocols are different.

Infrared rays need to be transmitted from interface to interface, and there are location restrictions.

Bluetooth is not required, as long as it is within the range of coverage.

Quite simply, the technology is different

Infrared ---

Light that is not visible to the naked eye and has a thermal effect other than red light is called infrared.

It is a wavelength longer than visible light, invisible to the naked eye, infrared is one of the many invisible rays in the sun's rays, discovered by the German scientist Hoxel in 1800, also known as infrared thermal radiation, the wavelength of infrared on the solar spectrum is greater than that of visible light, the wavelength of infrared can be divided into three parts, that is, near-infrared, the wavelength is between; mid-infrared, wavelengths between; Far infrared, wavelength between.

Far infrared ---

Far infrared refers to the wavelength of 3-1000 microns of infrared, scientific research has shown that the human body is beneficial and harmless is the invisible infrared light that accounts for 60% of the sun's energy, of which the wavelength of microns of this wavelength of infrared is extremely important for the survival of human beings and the growth of all things.

Life science research has confirmed that the human body itself is a source of far-infrared radiation, which can absorb and emit far-infrared light, so when far-infrared rays irradiate the human body, its frequency is consistent with the frequency of the movement of water molecules between cells and atoms in the body, causing a resonance effect, and its energy is the highest and can be absorbed by the organism, so that the temperature of the deep part of the subcutaneous tissue rises, and the thermal effect produces the activation of water molecules, which is in a high-energy state, accelerates the synthesis of biological enzymes required by the human body, and activates biomolecules such as proteins. In this way, it enhances the body's immunity and the tissue regeneration ability of biological cells, accelerates the supply of nutrients and enzymes, and promotes good health.

The difference between infrared and far-infrared rays is that they have different meanings, different characteristics, and different functions.

First, the meaning is different.

1. Infrared is an electromagnetic wave with a wavelength between microwave and visible light, with a wavelength between 1mm and 760 nanometers (nm), which is longer than red light.

2. Far infrared, also known as long-wave infrared, refers to infrared rays with a wavelength of microns. (However, in practical applications, infrared rays above microns are usually referred to as far infrared rays).

Second, the characteristics are different.

1. The infrared wavelength is longer, and the ability to pass through clouds and fog is stronger than that of visible light, giving people the feeling of heat, and the effect produced is the thermal effect.

2. Far infrared rays have strong penetration and radiation force, with significant temperature control effect and resonance effect, and it is easy to be absorbed by the object and converted into the internal energy of the object.

Third, the functions are different.

1. Infrared has a wide range of uses in communications, detection, medical treatment, military and other aspects. After the medical mid-infrared rays irradiate the body surface, part of it is reflected, and the other part is absorbed.

2. Far infrared rays are an indispensable factor for the survival of organisms, and people call this wavelength of far infrared rays "life light waves". The wavelength of sunlight is 6000 to 15000 nanometers, and the wavelength of the far infrared rays emitted by the human body is similar, which can produce the most effective "resonance" with the water molecules of the cells in the organism, and at the same time has the permeability to effectively promote the growth of animals and plants.