1. What is a data logger? A data logger is a type of data logger that takes measurements from sensors and stores them in spare electronic instruments. Common physical quantities recorded by data loggers are temperature, voltage, current, speed, tension, displacement, and others. The data logger and the sensor (also the probe) work together to convert the physical quantity and excitation signal to be measured into electrical signals, such as voltage and current; these electrical signals are then converted or digitized into binary data. Simply put, a logger is an instrument that converts the process of one or more variables over time (or other variables) into identifiable and readable signals. Second, the measurement principle of the data logger Typical waveform observation devices include oscilloscopes, electromagnetic oscilloscopes, and pen oscilloscopes (including pen recorders). However, with the development of digital technology, analog oscilloscopes have been replaced by digital oscilloscopes, and electromagnetic oscilloscopes and pen oscilloscopes have been recorded. Replace the instrument (transient recorder). This type of storage recorder is a storage recorder. The basic structure of the storage recorder is shown in Figure 1-1. It consists of an A/D converter, a data memory, a waveform display section, a printer, and a CPU that controls these. The input analog signal is digitally converted by an A/D converter and stored in a memory for display or printing as a waveform. Third, the comparison between the storage recorder and the analog recorder Here, the reason why the analog recorder such as a pen oscilloscope or an electromagnetic oscilloscope is replaced by a storage recorder is explained. The pen oscilloscope is an automatic balanced recorder that operates the servo motor according to the amplitude ratio of the input signal and moves the stylus pen to record. It has a response speed of several tens of Hz, but since the amplitude is mechanically realized, the response speed is limited, and If it is ink type, it needs to be maintained. Next, an electromagnetic oscilloscope is used, which uses a highly sensitive reflected current detecting element, which vibrates according to the amplitude of the input signal, reflects the light from the light source, and illuminates the photosensitive paper for recording. In this way, high-speed recording with a paper feed speed of 200 cm/Sec (5 ms/cm) can be performed, and a response speed of several kHz is provided. However, due to the high speed, the running cost of the photosensitive paper and the processing of the reflected current detecting element are difficult. The recording and printing part of the storage recorder uses a thermal dot matrix printer (8 points/mm high resolution), and there is no working part of the stylus pen, so the general reliability is high, and the sampling speed is 20MS/s (50 ns). High speed response. In addition, it has a rich trigger function that can only export the required waveform data, thus reducing operating costs. Moreover, not only the function, the performance improvement, but also the cost reduction of the host, these reasons make the storage recorder gradually replace the electromagnetic oscilloscope and the pen recorder. It is equipped with a color LCD screen for waveform display and a printer for printing. Whether it is display or print, it can be drawn in real time at a certain signal speed. (Real-time display on the screen at a sampling speed of more than 10kS/s) The sampling speed is up to 2MS/s. Although it is lower than the digital oscilloscope, it has the advantage of being able to be used for multiple input signals without an isolation amplifier or an isolation amplifier. There is no need to worry about the potential difference. Fourth, the name and function of each part of the storage recorder The stored data can be saved in the SSD or CF card or USB flash drive built into the host. Each input unit can basically input 2CH, and the unit can input DC1000V (AC700V) at the maximum. It can also support the replacement of dynamic strain or thermocouple, logic input and other units. Data transfer or remote operation can be performed by connecting a computer via USB or LAN. Copyright statement: This information belongs to Beijing Ocean Industrial Technology Co., Ltd., if you need to reprint, please indicate the source! Glass Bottle,Glass Double Wall Bottle,Glass Tea Bottle,Glass Bottle With Silicone Cover Ningbo Auland International Co.,Ltd. , https://www.everwaterbottle.com
