The sensitivity of an Infrared Receiving Tube is an important indicator of its performance, which can usually be measured in the following aspects.
First, the sensitivity of an Infrared Receiving Tube can be evaluated by the receiving distance. Under certain transmission power and environmental conditions, the farthest distance at which an effective infrared signal can be received is a key measurement parameter. The farther the distance, the higher its sensitivity. For example, some high-performance Infrared Receiving Tubes can receive clear signals at a distance of tens of meters or even farther under ideal conditions, while those with lower sensitivity may not be able to receive accurately within a few meters.
The response frequency is also an important factor in measuring sensitivity. It indicates the frequency range of infrared signals that the Infrared Receiving Tube can accurately respond to. A wider response frequency range means that the receiving tube can adapt to more different types of infrared emission sources and has better adaptability and sensitivity to complex infrared signal environments.
In addition, the noise level is also an important aspect of sensitivity considerations. A lower noise level means that the receiving tube can accurately distinguish effective information from weaker infrared signals without being interfered by internal noise. By measuring the output noise of the receiving tube when there is no signal input, its noise performance can be evaluated. The lower the noise, the higher the sensitivity.
In addition, the minimum threshold power of signal reception is also a direct indicator of sensitivity. That is, the minimum infrared transmission power that can make the receiving tube produce effective output. The lower this threshold power is, the weaker the receiving tube can sense the infrared signal, and the higher the sensitivity.
In actual testing, professional test equipment and standard test environment are often used to accurately measure these parameters. For example, using an infrared emission source with fixed power and frequency, the receiving tube is tested at different distances and angles, and the situation in which it can accurately receive and output effective signals is recorded.
For example, in a smart home control system, if the sensitivity of the Infrared Receiving Tube is not high enough, the remote control may need to be operated at a very close distance to take effect, which brings inconvenience to the user. In some industrial automation equipment, the sensitivity of the Infrared Receiving Tube is required to be higher, because it may be necessary to accurately receive infrared signals at a longer distance or in a complex electromagnetic environment to achieve precise control.
In summary, the sensitivity of the Infrared Receiving Tube can be comprehensively measured by multiple parameters such as receiving distance, response frequency, noise level, minimum threshold power, etc. In practical applications, according to specific usage scenarios and requirements, choosing an Infrared Receiving Tube with appropriate sensitivity is crucial to the performance and stability of the system.
