The machine tool monitoring system includes a host computer monitoring computer, multiple signal acquisition instruments, and multiple network connection cables. By each signal acquisition instrument continuously recording the operation information of the production machine tool, and uploading to the upper computer monitoring computer through the network connection cable, at any time to monitor the operation of each machine tool.
The machine tool monitoring system is suitable for monitoring the operation and running process of multiple machine tools. The machine tool monitoring system includes a host computer monitoring computer, multiple signal acquisition instruments and network connection cables installed on the corresponding machine tools. The signal acquisition devices are respectively installed on the corresponding multiple machine tools, and the network connection cables are used to connect with the host computer monitoring computer. The signal acquisition instrument collects machine tool operator's operation of the machine tool information, and some basic data collected from the machine tool is simply processed and stored. When the host computer monitors the computer query, the network connection cable is used. Transmit the data, and make the final processing on the monitoring computer of the host computer to generate more intuitive operation data or graphics.
The optical fiber-based optical cable with an outer diameter of only 0.4 to 3mm is suitable for use in high-precision machine tool processing
A sensor is a physical device or biological organ that can detect and feel external signals, physical conditions (such as light, heat, humidity) or chemical composition (such as smoke), and transmit the detected information to other devices or organs. Sensors have already penetrated into extremely wide fields such as industrial production, space development, ocean exploration, environmental protection, resource investigation, medical diagnosis, bioengineering, and even cultural relics protection. It is no exaggeration to say that from the vast space, to the vast ocean, to complex engineering systems, almost every modernization project is inseparable from various sensors. Classification of sensor working principles Physical sensors apply physical effects, such as piezoelectric effect, magnetostriction, ionization, polarization, thermoelectric, photoelectric, magnetoelectric and other effects. The small changes of the measured signal will be converted into electrical signals. Chemical sensors include those that use chemical adsorption, electrochemical reactions, and other phenomena as the causal relationship. The small changes in the measured signal quantity will also be converted into electrical signals.
Detection technology and automation devices are a conforming technology that integrates various disciplines and technologies such as automation, electronics, computers, control engineering, information processing, and machinery, and integrates them into a comprehensive application And other fields of automation equipment and production automation process. The research and application of detection technology and automation devices not only have important theoretical significance, but also accord with the current and future strategy of China's scientific and technological development for a long period of time, but also closely integrate with the actual situation of the national economy, and promote the technological progress of enterprises and the transformation of traditional industrial technology. It is of great significance to the modernization of railway technical equipment.
Using the spacing detection sensor developed and designed by the Fraunhofer IPT Institute, it is possible to complete the nano-level precision detection of the shape and position errors of the processed parts at multiple different detection positions at the same time. This technology can be well applied in the fields of aerospace, automobile manufacturing, printing machinery manufacturing and optical equipment manufacturing.
This detection technology is suitable for those occasions where traditional detection solutions have limited installation and use space and traditional detection technologies cannot meet the detection accuracy. The detection frequency of this sensor is very high, and the detection error is significantly smaller than that of the high-precision detector. It can realize online detection of machine tools and equipment in the ultra-precision range, such as the monitoring of the movement axis and guide rail movement of the machine tool, and the monitoring of the drive shaft.
The detection system developed by the Fraunhofer Institute is based on the principle of short-wave laser interference and is mainly composed of two coherent laser components. The first of these is pure optical all-fiber technology components (SLD1), and the second is Michelson laser interferometer (SLD2). The detection distance of this detection instrument is about 500μm, and the detection range with a resolution of 1nm is about 80μm.
IPT is an application that provides mobile phone users with multimedia messages. Its main function is to send users to communicate quickly with others or the system through IPT system, using voice, text, information and other methods when they need to respond quickly and work together. IPT has a new message reminder setting, the other party's status display, can remind the recipient user by receiving short messages, etc. The recipient can receive and view the information record sent by the sender when it is convenient or the network is smooth, to ensure that the user has no omissions Improve communication efficiency.
The system developed by the Fraunhofer IPT Institute is based on the working principle of laser short coherence. Its main components are two coherent laser component units, the first of which is pure optical all-fiber technology components (SLD1), and the second It is a Michelson laser interferometer (SLD2). This sensor is connected with a light wave cable (LWL). The outer diameter of the cable is 0.4 ~ 3mm. For sensors with high rigidity requirements, it can be installed on CFK or nickel-titanium composite metal In the shell.
Finally, the two signals are decoded in the Michelson interferometer. The miniature sensor and the detection device are integrated, and the final evaluation device of the detection result does not need to be installed on the detection site. In addition, the structure of this detection system also allows multiple detection sensors to be used in one detection evaluation unit. Using the fiber optic switch can quickly and easily switch between the various sensors.
The raster image thus obtained in the Michelson interferometer will be decoded with a CCD charge-coupled camera, and the computer will be used for the next data processing. The detection distance and detection range depend on the sensor signal (focal length) and the angle of the refracting mirror and the distance between it and the laser beam. Compared with other detection systems, the advantage of this detection system is that it has no mechanical parts with different gears like linear regulators or piezoelectric generators.
Characteristic decoding of CCD charge-coupled camera
CCD, English full name: Charge-coupled Device, Chinese full name: charge-coupled device. It can be called CCD image sensor. CCD is a semiconductor device that can convert optical images into digital signals. The tiny photosensitive material implanted on the CCD is called a pixel. The greater the number of pixels contained on a CCD, the higher the picture resolution it provides. CCD functions like film, but it converts image pixels into digital signals. There are many neatly arranged capacitors on the CCD, which can sense light and convert the image into a digital signal. Through the control of external circuits, each small capacitor can transfer the charge it carries to its adjacent capacitor. There are two kinds of CCD processing technology, one is TTL technology, the other is CMOS technology, the former is milliamp power consumption, and the latter is micro-amp power consumption. The imaging quality of CCD under TTL technology is better than that under CMOS technology. CCD is widely used in industrial, medical and civilian products.
When the measured object enters the inspection range, an intrinsic characteristic interference light sample decoded by the CCD charge-coupled camera will be generated. Use the lateral position of the interference signal to compensate for the distance between the measured objects in the CCD chip, and convert the distance adjustment to the number of pixels in the image.
To deal with energy and resource issues economically, machine tools and equipment must be monitored during continuous use. For this reason, an easy-to-integrate sensor technology has become a key factor for timely maintenance of machine tools and equipment, ensuring product quality, avoiding downtime and improving production process stability.
High-precision production process monitoring requires data directly from the production process as a guarantee. These data should be provided by sensors installed on the machine tool equipment. Most of the sensors responsible for such detection and monitoring tasks are optical fiber sensors, that is, miniaturized optical fiber sensors with extremely high detection accuracy, which can be easily integrated in machine tools, equipment and testing instruments, and can complete monitoring and The task of data transmission.
The optical fiber-based optical cable with an outer diameter of only 0.4 to 3mm is suitable for use in high-precision machine tool processing
Using the spacing detection sensor developed and designed by the Fraunhofer IPT Institute, it is possible to complete the nano-level precision detection of the shape and position errors of the processed parts at multiple different detection positions at the same time. This technology can be well applied in the fields of aerospace, automobile manufacturing, printing machinery manufacturing and optical equipment manufacturing.
This detection technology is suitable for those occasions where traditional detection solutions have limited installation and use space and traditional detection technologies cannot meet the detection accuracy. The detection frequency of this sensor is very high, and the detection error is significantly smaller than that of the high-precision detector. It can realize online detection of machine tools and equipment in the ultra-precision range, such as the monitoring of the movement axis and guide rail movement of the machine tool, and the monitoring of the drive shaft.
The detection system developed by the Fraunhofer Institute is based on the principle of short-wave laser interference and is mainly composed of two coherent laser components. The first of these is pure optical all-fiber technology components (SLD1), and the second is Michelson laser interferometer (SLD2). The detection distance of this detection instrument is about 500μm, and the detection range with a resolution of 1nm is about 80μm.
The system developed by the Fraunhofer IPT Institute is based on the working principle of laser short coherence. Its main components are two coherent laser component units, the first of which is pure optical all-fiber technology components (SLD1), and the second It is a Michelson laser interferometer (SLD2). This sensor is connected with a light wave cable (LWL). The outer diameter of the cable is 0.4 ~ 3mm. For sensors with high rigidity requirements, it can be installed on CFK or nickel-titanium composite metal In the shell.
Finally, the two signals are decoded in the Michelson interferometer. The miniature sensor and the detection device are integrated, and the final evaluation device of the detection result does not need to be installed on the detection site. In addition, the structure of this detection system also allows multiple detection sensors to be used in one detection evaluation unit. Using the fiber optic switch can quickly and easily switch between the various sensors.
The raster image thus obtained in the Michelson interferometer will be decoded with a CCD charge-coupled camera, and the computer will be used for the next data processing. The detection distance and detection range depend on the sensor signal (focal length) and the angle of the refracting mirror and the distance between it and the laser beam. Compared with other detection systems, the advantage of this detection system is that it has no mechanical parts with different gears like linear regulators or piezoelectric generators.
Characteristic decoding of CCD charge-coupled camera
When the measured object enters the inspection range, an intrinsic characteristic interference light sample decoded by the CCD charge-coupled camera will be generated. Use the lateral position of the interference signal to compensate for the distance between the measured objects in the CCD chip, and convert the distance adjustment to the number of pixels in the image.
The complete system consisting of data matching instruments and sensors is produced and sold by Fionec GmbH, established in Achen by the Fraunhofer IPT Institute.
In this system, the roundness and round runout of the rotating slewing parts have an important impact on the detection accuracy, noise and wear of the entire system. The error signals due to them should be identified and produced in the production process Excluded, which includes important parts of the machine tool, such as output shaft, rotor, main shaft, rolls (backup rolls and work rolls) and guide rolls. Sensors should be installed on these revolving body parts in order to collect important production process data and take necessary measures in time.
In this detection method, the deformation of the rotating component under the action of external force (the deformation of the rotating component under the action of external force can be detected at multiple different detection points), which occurs during the production process Surface wear and shape wear (peeling, adhesion, surface crushing and friction) of rotating parts can be important parameters to be tested.
This technology can be directly applied in the field of printing, for example. In this field, the roundness and round run-out error of roller parts have a direct impact on the quality of printed matter. Another area where this type of inspection technology can be used directly is roll production enterprises, because this area requires inspection of the microstructure of the surface of the roll that produces the photoconductive plastic film.
In this case, it is very appropriate to use optical fiber-conducted distance detection sensors to detect at multiple detection points, because the space required for the installation of these detection sensors is very small (miniature sensors), non-contact detection is used, not Will cause damage to the measured surface, there is no interaction and influence between the sensor and the measured object.
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