On the afternoon of March 7, 2014, the third council of the 4th Jiangsu Machine Tool Industry Association opened in the “China Tool Town†Changzhou Xixiashu, the president of Jiangsu Yangli Group and the third board of directors of Jiangsu Machine Tool Industry Association. Lin Guofu, chairman of the board of directors, presided over the convening of the board meeting and made a work report. It is now attached as follows. In the past year, I will pay close attention to the key points, hot spots and difficulties of the machine tool manufacturing industry. In 2013, under the general environment of slowing domestic economic growth, the market environment and other growth factors changed accordingly. The machine tool industry was in a low-level operation state throughout the year; the market scale was shrinking overall, and the industrial structure and product structure of the entire industry. The contradiction with market demand has not been effectively alleviated; corporate profits have continued to decline, market competition has become increasingly fierce; the decline in export growth has not improved significantly; at the same time, imports that have maintained growth for a long time have also fallen sharply. In order to further understand the production status of the province's machine tool industry and the import and export situation of the products, on July 22, 2013, I will organize some members to hold a discussion in Nanjing, Yangli Group, Jiangsu Yawei, Nanjing Second Machine Tool, Wode Group, Changzhou Leaders of Chuangshengtel, Yangzhou Lichuang and Nanjing Ningqing participated in the exhibition. The leaders of the Provincial Electromechanical Products Import and Export Office Zhang Junqing and Yuan Ping were invited to attend. I will work and get the strong support of the Provincial Department of Commerce. On December 5th, the official signing ceremony of the Memorandum of Cooperation was held in the Provincial Department of Commerce. Mr. Lin Guofu, President of the company, came to Nanjing from Yangzhou to participate in the signing ceremony. The Office of Commerce clearly stated in the Memorandum of Cooperation: Taking the development of the machine tool industry as one of the key industries for the import and export of mechanical and electrical products in the province, jointly promoting the transformation and upgrading of the province's machine tool industry, helping enterprises to explore the international market and organizing enterprises to participate in each Class professional exhibitions encourage enterprises to introduce advanced technology and equipment. In order to further understand the latest developments in the world's mechanical equipment, from September 11th to 23rd, I will jointly organize a delegation with the Provincial Textile Machinery Association to visit the Chicago International Machinery Design and Manufacturing Exhibition, a group of 18 people. I will accept the entrustment of relevant government departments, and have participated in the first introduction of major technical equipment certification by the Provincial Department of Commerce, the provincial-level enterprise technology center evaluation of the Provincial Economic and Information Committee, the first set of major equipment certification, and the provincial quality and technical supervision bureau. Relevant work on the evaluation of brand-name products and the evaluation of well-known trademarks of the Provincial Administration for Industry and Commerce. In the identification of provincial famous trademarks, Jiangsu Yawei Machine Tool Co., Ltd. “YAWEI†trademark, Wuxi Machine Tool Co., Ltd. “Tin Machineâ€, Guannan Die Casting Machine Co., Ltd. “Irrigationâ€, Jiangsu Qihang CNC Machine Tool Co., Ltd. "Zhenzhen", Jiangsu Jianghai Machine Tool Group Co., Ltd. "Jianghai", as well as Yangzhou Forging Machine Co., Ltd., Nanjing Technology Equipment Manufacturing Co., Ltd. and other trademarks have passed the certification. I will actively match the business between member units and expand market sales. In the whole year, I will be a matchmaker for 4 member units, set up a collaborative bridge and build a communication platform. In 2013, I will complete 3 issues of Jiangsu Machine Tool. "Information" is the publication and distribution work. "Information" focuses on the promotion of national industrial policies, analyzes the situation of machine tool industry at home and abroad, reports on business activities in the industry, and expands the influence of the province's machine tool industry; I will continue to do the "12th" The China International Machine Tool Exhibition (CIMES2014) has organized a group organization with an exhibition area of ​​more than 2,000 square meters to provide quality services to its members. In the new year, under the leadership of the provincial party committee and the provincial government, the council will adhere to the main line of scientific development, focus on promoting technological innovation and scientific and technological progress in the industry, and strive to create a new situation in the work of the association, and contribute to the development of the Jiangsu machine tool industry. Contribute.
The vibration sensor(Vibration Transmitter) is one of the key components in the testing technology of Vibration Measurement. Its main function is to receive the mechanical quantity and convert it into a proportional electric quantity. Because it is also an electromechanical conversion device. So we sometimes call it a transducer, a vibration pickup, etc.
Commonly used vibration sensors are as follows:
1. Piezoelectric resonant
The piezoelectric sheet is used to receive the vibration signal, and the resonance frequency of the piezoelectric sheet is relatively high. In order to reduce the resonance frequency, it is realized by increasing the mass of the piezoelectric sheet vibrating body, and using a spring ball instead of an appendage to reduce the two resonance frequencies and enhance the vibration effect. Its advantages are high sensitivity and simple structure. However, the signal needs to be amplified and sent to a TTL circuit or a single-chip microcomputer circuit, but it is enough to use a triode single-stage amplification
2. mechanical vibration
In the traditional vibration detection method, after being vibrated, the spring ball vibrates at a reduced amplitude for a long time, and this vibration is easy to be detected by the detection circuit. The vibration output switch signal is determined by the output impedance and the resistance value of the matching output. According to the input impedance of the detection circuit, it can be made into a high-impedance output mode.
3. Micro Vibration Sensor
The mechanical vibration sensor is miniaturized, the vibration body is carbonized and sealed, and its working performance is more reliable. The output switching signal is directly connected with the TTL circuit and or the input circuit of the single-chip microcomputer, and the circuit structure is simple. The output impedance is high, and the quiescent working current is small.
Advantages of Vibration Sensors
1. Small size and light weight. It can be applied to some vibration test systems that are greatly affected by the additional mass.
2. It has a wider response frequency range of 4Hz-2000Hz than the magnetoelectric speed sensor, and the mechanical moving parts are not easy to damage
If you have any questions about the vibration sensor, please contact us, we will provide you with professional and timely answers.
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