Worktable type electronic impact hammer

A technology of impact hammer and worktable, applied in the field of hammer device, can solve the problems such as difficulty in keeping the size and direction of hammering force consistent, difficult control of excitation time, difficulty in excitation force pulse, etc., to ensure repeatability and firm design , to ensure the effect of adjustability

A technology of impact hammer and worktable, applied in the field of hammer device, can solve the problems such as difficulty in keeping the size and direction of hammering force consistent, difficult control of excitation time, difficulty in excitation force pulse, etc., to ensure repeatability and firm design , to ensure the effect of adjustability

CN102879167AInactive Publication Date: 2013-01-16SHANDONG UNIV
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  • Worktable type electronic impact hammer
  • Worktable type electronic impact hammer
  • Worktable type electronic impact hammer

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Experimental program
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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] A workbench type electronic impact hammer, combined with Figure 1 to Figure 3 , including a workbench, a controller, a trigger, and a DC power supply, the controller and the trigger are respectively connected to the DC power supply, and the controller is respectively connected to the trigger and an actuator, and the actuator includes a traction electromagnet 16, the electromagnet The overhanging part 17 of the iron core is connected with the force sensor 18, the front end of the force sensor 18 is provided with a protective impact head 19, and the electromagnet 16 is installed on the platform of the workbench. The extension part of the iron core and the force sensor are threaded, and different force sensors and impact heads are selected according to the needs to obtain the required excitation frequency.

[0029] The controller includes an optocou...

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Abstract

The invention discloses a worktable type electronic impact hammer. The worktable type electronic impact hammer is characterized by comprising a worktable, a controller, a trigger and a direct-current power supply, wherein the controller and the trigger are respectively connected with the direct-current power supply; the controller is respectively connected with the trigger and an actuator; the actuator comprises a traction type electromagnet; an iron core extending part of the electromagnet is connected with a force sensor; an impact head with a protecting function is arranged at the front end of the force sensor; and the electromagnet is arranged on a platform of the worktable. The repeatability and the adjustability of impact force are guaranteed, the time for contact between the hammer and a mechanical structure to be measured is controlled reliably so as to obtain ideal force pulse, and the worktable type electronic impact hammer is particularly applied to modal analysis, automatic impact testing and finite element analysis (FEA) modal verification of the mechanical structure.

Description

technical field [0001] The invention relates to a hammer device for hammering modal tests, in particular to a bench-type electronic impact hammer which can generate repeatable and variable impact force by adjusting pulse time through a BCD switch. Background technique [0002] The experimental modal analysis method is used to measure the dynamic characteristics of the mechanical structure, and its purpose is to obtain the natural frequency, mode shape and modal damping of the structure, so as to perform transient dynamic simulation or harmonic response analysis of the mechanical structure. [0003] Modal tests often use the hammer method. The hammering method is to hit (that is, excite) the mechanical structure to be tested by using an impact hammer equipped with a force sensor, and obtain the mechanical properties of the mechanical structure with the help of modal testing technology and fast Fourier transform (FFT) with the principle of pulse test and modal theory. Methods...

Claims

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Application Information

Patent Timeline
16 Jan 2013
Publication
CN102879167A
IPC
G01M7/08
Inventors
刘战强; 张杨广