Introduction of photoelectric sensor technology, multi-sensor information fusion of sensor technology

The application of sensor technology is becoming more and more extensive. For sensor technology, all electronics professionals know how much. In order to improve everyone’s understanding of sensor technology, this article will introduce sensor technology based on two aspects: 1. Photoelectric sensor technology, 2. Multi-sensor information fusion technology.

The application of sensor technology is becoming more and more extensive. For sensor technology, all electronics professionals know how much. In order to improve everyone’s understanding of sensor technology, this article will introduce sensor technology based on two aspects: 1. Photoelectric sensor technology, 2. Multi-sensor information fusion technology.

Introduction of photoelectric sensor technology, multi-sensor information fusion of sensor technology

1. Photoelectric sensor technology

There have been new developments in the development direction and application field of photoelectric sensors, and in different occasions, photoelectric sensors will follow the differences in technology to develop the technology to a certain level. Then the technology of the photoelectric sensor can be understood as:

Photoelectric sensors are sensors that use photoelectric elements as detection elements. It first converts the measured changes into changes in optical signals, and then further converts the optical signals into electrical signals with the help of photoelectric elements. The photoelectric sensor produces photoelectric effect after being irradiated by visible light, and converts the light signal into an electrical signal for output. In addition to measuring light intensity, it can also measure various physical quantities, such as size, displacement, speed, temperature, etc. by light transmission, occlusion, reflection, interference, etc., so it is an important sensitive device photoelectric sensor with a wide range of applications. It is generally composed of three parts: light source, optical path and optoelectronic components. The photoelectric detection method has the advantages of high precision, fast response, non-contact, etc., and can measure many parameters. The structure of the sensor is simple and the form is flexible and diverse. Therefore, the photoelectric sensor is widely used in detection and control.

Exceptionally, the photoelectric effect of a photoelectric sensor is mainly a physical phenomenon in which light irradiates certain substances and changes the electrical properties of the substances, which can be divided into two categories: external photoelectric effect and internal photoelectric effect. The external photoelectric effect refers to the physical phenomenon in which electrons in an object escape from the surface of the object and are emitted outward under the action of light. Photons are descriptions of electromagnetic waves in the visible light band in the form of quantized “particles”. Photons have energy hv, where h is Planck’s constant and v is the frequency of light. The photon flux corresponds to the light intensity.

Introduction of photoelectric sensor technology, multi-sensor information fusion of sensor technology

Second, the significance of multi-sensor information fusion technology

In general, information fusion (also known as data fusion) is a multi-level and multi-faceted processing process for information. The process is to fuse multi-source data to obtain accurate, complete and timely target attributes and states. Waltz and LinaS et al. gave a more complete definition of data fusion: a multi-level! multi-faceted processing process, which is to detect, combine, correlate, estimate and combine multi-source data to achieve accurate state estimation and Identity estimates, as well as complete and timely situational assessments and threat estimates. Now, the more precise definition of information fusion can be summarized as: using computer technology to automatically analyze and synthesize the observation information of several sensors obtained in time series under certain criteria to complete the required decision-making and estimation tasks. . It is to comprehensively process the measurement information from multiple sensors through a certain algorithm to generate more reliable, more accurate and more complete information, and to make judgments, estimates and decisions based on this information. Information for data preprocessing, data association, data decision-making and data fusion and so on. The multi-sensor information fusion system has the following advantages:

(1) The information provided by any sensor is unilateral and incomplete, and may be wrong and inaccurate. The accuracy of the sensors is not the same, and the types of information provided are not the same. By comprehensively processing the information provided by multiple sensors, more reliable judgments and decisions will be made than a single sensor, and the accuracy of the guidance system will be greatly improved.

(2) The information characteristics provided by different sensors are different, and the multi-sensor information fusion system can obtain a large amount of characteristic information that cannot be obtained by a single sensor, which greatly enhances the anti-interference ability of the system.

The Links:   PM20CSJ060 LM32P18

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