Digital sensor refers to the traditional analog sensor after the addition or modification of the A/D conversion module, so that the output signal for the digital quantity (or digital code) of the sensor, mainly including: amplifiers, A/D converter, microprocessor (CPU), memory, communication interfaces, temperature test circuits, etc., in the microprocessor and sensors are becoming more and more inexpensive today, the full-automatic or semiautomatic (through the manual instructions for high-level operations and automatic handling of low-level operations) systems can include more intelligent features that can acquire and process more diverse parameters from their environment.
Digital sensor belt features
1. Advanced A/D conversion technology and intelligent filtering algorithm can still ensure the stability of the output code in the case of full scale.
2. feasible data storage technology to ensure that the module parameters will not be lost.
3. Good electromagnetic compatibility performance.
4. the performance of the sensor using digital error compensation technology and a high degree of integration of electronic components, software to achieve the sensor's linearity, zero, temperature drift, creep and other performance parameters of the comprehensive compensation, eliminating the impact of human factors on the compensation, greatly improving the sensor's overall accuracy and reliability.
5. the sensor's output consistency error can reach within 0.02% or even higher, the sensor's characteristic parameters can be exactly the same, and thus has good interchangeability.
6. the use of A/D conversion circuit, digital signal transmission and digital filtering technology, the sensor's anti-interference ability to increase the signal transmission distance, improve the stability of the sensor.
7. digital sensors can automatically collect data and can be preprocessed, stored and memorized, with a unique mark, easy to troubleshoot.
8. the sensor uses a standard digital communication interface, can be directly connected to the computer, can also be connected to the standard industrial control bus, convenient and flexible.
9. digital sensor is the AD, EPROM, DIE (refers to the sensor chip has not been packaged, belongs to the bare chip, the size of between cell and chip), packaged in a PCB, metal block or ceramic board on the integration. Through the calibration of various temperature and pressure points, the linearity of the DIE is calculated, and then processed by using the AD de-compensation method.
Digital Sensor Belt Applications and Prospects
Nowadays, as microprocessors and sensors are becoming cheaper and cheaper, fully automated or semi-automated (high level operations by manual commands and automatic processing of low level operations) systems can incorporate more intelligent functions and can acquire and process more and more different parameters from their environment. In particular, MEMS (Micro Electro Mechanical Systems) technology enables digital sensors to be very small in size and low in energy consumption and cost. Nanosensors made of carbon nanotubes or other nanomaterials also have great potential.
Even in their infancy, digital sensors are seen as an important driver for the electronics market in the near future. The creation of interfaces for digital sensors and the support of a wide variety of communication protocols for digital sensor networks represent a great challenge for the technological process. The non-homogeneous nature of the sensors and the diversity of their operating conditions also pose a great challenge to the technological process.
The number of sensors and processors included in a system design is increasing. As the prices of sensors and processors continue to decrease, the thresholds for replacing mechanical control structures are changing. Choosing the right combination of sensors and processing algorithms in a system can significantly reduce raw material and energy costs and improve overall system performance. Increasing operational simplicity and extending energy life are becoming increasingly important, especially as more and more sensor networks today are configured with 1,000 or more sensor nodes.