Piano keyboard vibration playing instrument
A vibrator and piano key technology, applied to instruments, stringed instruments, etc., can solve the problems of long time, large differences in temperature and humidity environment, and multiple spaces, and achieve the effect of reducing time and rapid on-site detection.
Active Publication Date: 2012-06-13
BEIJING MUSICAL INSTR RES INST
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Problems solved by technology
On the one hand, this method takes a long time to judge the pitch stability of the finished piano; on the other hand, due to the large size of the piano, this method will take up more space, making this detection method economical, The rationality is poor. For example, if the finished pianos of foreign piano factories are transferred to the musical instrument testing center, the cost will be high, and the musical instrument testing agency needs to prepare corresponding venues, and the temperature and humidity environments are quite different, and the production standards and testing standards should not be unified; if It is not practical for the musical instrument testing agency to send people to the scene to test one by one
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[0023] The piano keyboard vibration instrument of the present embodiment includes a controller 1, a key beating device and a key reset sensor. The controller 1 is a programmable logic controller (PLC); its internal structure is as follows Figure 7 As shown, it includes a liquid crystal display 20, a system power supply 21, a keyboard input board 22, and an input-output adapter board 23 that are respectively connected to the system motherboard 19; the second photoelectric isolation device 28 and input The socket 25 is also provided with a first photoelectric isolation device 21 , a power amplifier 26 and an output socket 27 . The key reset sensor is an infrared sensor switch. In this embodiment, a photoelectric cell 17 is specifically used, and the photoelectric cell 17 is connected to the input socket 25 of the controller 1 through the second data line 3 . The key beating device is a pneumatic beating device, which includes a gas compressor, a solenoid valve 5, a manif...
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The invention relates to a piano keyboard vibration playing instrument, which comprises a controller, a piano key striking device and a piano key reset sensor, wherein the piano key striking device and the piano key reset sensor are respectively connected with the controller through a first data wire and a second data wire, the piano key reset sensor detects the position of piano keys and transmits the detection signal to the controller through the second data wire, and the controller transmits a working signal for the piano key striking device to strike the piano keys through the first data wire according to the detection signal transmitted by the piano key reset sensor. The piano keyboard vibration playing instrument can simulate the force and frequency played by people. By adopting thepiano keyboard vibration playing instrument to strike the piano keyboard for a given times and / or a given frequency so as to test the variation of the tone of the piano keyboard before and after the striking, so the intonation stability of the piano from a piano factory can be rapidly judged on the spot.
Description
technical field [0001] The invention relates to a detection device for the pitch stability of a piano, in particular to a piano keyboard vibration instrument capable of simulating the strength and frequency of a human playing. . Background technique [0002] As the king of musical instruments, the piano is more and more loved by people. It has been widely used at present, and its quality improvement has been paid more and more attention. In order to meet the needs of development and effectively guide production, when revising the national piano standard in 2008, The pitch stability of the piano is put forward in the standard as an important indicator requirement. The quality of piano intonation stability is affected by many factors, such as: the influence of temperature and humidity changes on the soundboard, the influence of the extension characteristics of the string wire itself on the intonation; the friction between the peg board and the peg The effect of size on pitch...
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IPC IPC(8): G10C9/00G10C3/12
Inventor 张振启王伟郭学成孟宇孙朝平贾岳王晋飞齐朋
Owner BEIJING MUSICAL INSTR RES INST