Type: to be shown the parameters I d vector (single row matrix), if the scalar, such as, S. Such as, I a 1; As if for a first order tensor本文来自辣/文(论"文?网，
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, D, H,,,, P, I 1, 2, 3; If a second order tensor, and can be reduced to 6 d vector, such as, s, I = 1, 2,..., 6; As shown in the parameter of the ordinal number, 6 six generalized force and generalized displacement, so the J = l, 2,..., l2; For the coupling between the two parameters
Coefficient matrix; Z to the first one and coupling of the independent variable parameters; If considered at the same time, 1, 2, 6 kinds of energy parameters and the mutual coupling between the the rest ¨ every be shown parameter is a function of the independent variables. For example, when off for D (electric displacement), formula (2) can be written as: EI Dt - E + dHT + present mI H + pi0 ten tt, K + vnPk +.. (equals sign right from the first item of the following coupling relationship with D, respectively, the main effects of the electrical signal to, positive piezoelectric effect and induced
Inverse piezoelectric effect, magnetoelectric effect, thermoelectric effect, the photoelectric effect and acoustoelectric effect ¨ effect. By analogy, can get the rest of the l1 expression such as type (3). This can be listed property effect between list]. 6 kinds of energy. At table, you can see that too much
Effect has been developed, some effects, such as magnetic, acoustic thermoacoustic effect, etc are to be exploited. Thus, crystal asked the physical effects of 6 kinds of energy model, not only can explain for effect, but also can predict untapped effect. It should be noted that in this equation, the optical quantity corresponds to the shown strong definition of variables and in capacity remains to be determined. From the volatility of light, it seems should work with electrical signal in strong similar to shown variable is defined. In practice, however, is applied to the sensor light effect is mainly using the particle nature of light, so light energy corresponding to the two coupled variables should be defined particle nature of light. In addition, the author of piezoelectric secondary effect and multiple induced effect has carried on the experimental research, proposed the electromechanical effect and electromagnetic effect similarity judgment, and do the analytic proof. Utilizing piezoelectric secondary and multiple induced effect possible to test the micro force and micro displacement.
Two piezoelectric sensors and the research and development of the dynamometer
2.1 the piezoelectric sensor
Piezoelectric sensor and dynamometer is always the key point of the author's institute for research and development project. Has developed a one-way, two-way, three-way piezoelectric Shi Yingli sensor (see figure 6 ~ 8), and approved by technical appraisal and won the second prize of provincial scientific and technological progress, respectively, and according to the range and application form \"series of products. In addition, the successful development of piezoelectric unidirectional and multidirectional acceleration sensor and pressure resistance, axial and radial load bearing sensor [.
2.2 piezoelectric dynamometer
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