Splicable and detachable floating line-free sensor array

Abstract

The invention relates to a splicable and detachable floating line-free sensor array. The splicable and detachable floating line-free sensor array is technically characterized by comprising a central module, flank modules and array element nodes, wherein the central module and the flank modules are detachably installed together; the array element nodes are installed on the front side surfaces of the central module and the flank modules and are in planar spiral array distribution; the central module as well as each flank module comprises a front panel, a circuit board layer and a back lining plate; the circuit board layer is installed between the front panel and the back lining plate; and module connecting plugs arranged at splicing positions of the circuit board layer of the central module and the circuit board layer of each flank module and are mutually spliced together. The splicable and detachable floating line-free sensor array is reasonable in design; electrical signal connection between the central module and each flank module is realized through the module connecting plugs, so that the problem that the conventional sensor array is complicated in line arrangement, high in installation difficulty and poor in signal interference resistance is solved and the signal quality is ensured; and the splicable and detachable floating line-free sensor array is good in electrical property and has the characteristics of compact structure, good rigidity, easiness in detachment and combination, convenience for carrying and the like.

Description

technical field [0001] The invention belongs to the field of acoustic and vibration measurement, in particular to a detachable non-floating line sensor array. Background technique [0002] The sensor array refers to the arrangement of multiple acoustic or vibration sensor receiving units in space. It is an acoustic detection device distributed on the bracket according to a certain plane or three-dimensional geometric shape, or ordered or randomly arranged. The main function is to calculate the spatial sound field. Or the energy distribution of the vibration field, get the spatial information of the sound field or vibration field, determine the position and intensity of the sound source or vibration source, and can enhance the desired signal and suppress background noise and interference sources, so it is widely used in industrial machine noise control and machine fault diagnosis. [0003] The portability and reliability of the sensor array are important factors affecting it...

AI Technical Summary

Problems solved by technology

The size of the sensor array is related to the frequency of the machine noise and vibration to be measured. Since the frequency of machine noise and vibration is usually low, the sensor array is required to have a larger aperture size, which will greatly improve the use, transportation, and installation of the sensor array. brings difficulties

At present, the size of products on the market, such as the planar circular array of German GiFi company and the planar spiral array of Danish B&K company, are all fixed. In order to solve the problem of portability, the aperture size of the array is sacrificed, which is generally less than 0.75. m, which affects the performance of the product

The folding method used by the Institute of Acoustics of the Chinese Academy of Sciences to develop the planar spiral sensor array increases the aperture of the array, but it is difficult to guarantee the flatness after unfolding, especially the signal line is easily damaged, and the reliability cannot be guaranteed.

At present, similar products on the market are facing the problem of complex signal line routing. Each microphone needs to be connected to the acquisition device with a cable. Due to the large number of microphones, such as 64 yuan or 128 yuan or more, not only the cable wiring is intricate, The installation is difficult, the risk of failure is high, and the weight of the array is increased, which affects the appearance. More importantly, the reliability of the cable connection is poor. The connection plug-in of the cable used for a long time will often have problems, and the reliability of the electrical performance is poor.

[0004] To sum up, the existing sensor arrays must make some compromises in terms of array size, use and portability, which affects the performance of the product

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