Electromagnetic Vibration Testing System for circuit board automobile

I. Product Application

Vibration test is a process of exciting or shocking some part or device to observe its reaction in real environment. Vibration test is widely applied in many fields, ranging from circuit board, airplane, ship, rocket, missile, automobile, household appliance and other industrial products. Labtone can offer you the whole vibration and testing proposal, and provide you with the quality certificates of products according to national and international standards, including GB, GJB, UL, JIS, DIN, ISO, BS, MIL, IEC and ASTM standards.

II. Type Selection Formula of Vibrator and Structural Diagram of Vibration Generator

① Test conditions provided by your company; ② Test types: sine sweep; random; ③ Frequency response range: 2 to 3000Hz ④ Formula: A(g)=(2πf)2Dcm/980≒A=0.002DmmF2 D=A/0.002F2

F=M(kg) ×A(g)

III. Principle Block Diagram of Equipment

Installation diagram of vibration tester

IV. Equipment Configuration

V. Technical Parameter

VI. Introduction to Equipment Performance

6.1 Vibration table VG300-25

6.1.1 Armature Vibration table is provided with cast and manually processed armature, photoelectric pneumatic load support system and dual-bearing axial guide. The dual-bearing guide has a special function. It has excellent durability and can reduce axial dynamic crossing and rotation in vibration test process.

6.1.2 Excitation coil It is of double magnetic circuit structure with low flux leakage and uniform magnetic field.

6.1.3 Table surface Advanced phosphating and automotive paint technologies are applied for the surface to resist wear and rusting for long time.

6.1.4 Table cooling Intake air structure with low noise blower and improved table is applied, the excitation coil is of cellular duct, middle magnetic loop is of double-layer split duct, so new duct design is applied to enhance cooling effect.

6.2 SA digital switch power amplifier MOSFET or IGBT technology with reliable performance is used for SA digital switch power amplifier. a. High stability and reliability. b. Consistency with “CE” standard requirements of EU. c. The power amplifier has high signal to noise ratio as sine double-frequency pulse width modulation technology is used. d. Switching efficiency is high as operating principle of the switching power supply is used. e. Automatic electronic current sharing technology is used. f. Good safety.

6.3 Servo protection system

It has complete protection functions, including grid overvoltage, under-voltage, phase loss, logic fault, power module conduction through, over-temperature, over-current output, overvoltage output, power supply drive, table over-displacement, table temperature, external interlocking, etc.

6.4 Vertical extending platform The extending platform is usually used as a large installation platform of specimens which can be square, round or defined by users. In order to reduce dynamic impact on the extending platform, all extending platforms must be subject to analysis of modal frequency by modeling, and these platforms are generally made of magnesium alloy and attached with damping materials.

6.5 Automatic photoelectric centering system It automatically adjusts position of the armature to keep it in balance state. The automatic centering system is used to ensure that the armature is in the center during loading and unloading process.

7. Introduction to digital vibration controller The vibration controller is of advanced distribution structure system, and closed-loop control is achieved by DSP processor. PC is independent of control loop to ensure real-time and high efficiency of the control system so as to timely and rapidly respond to any changes of the test system, and ensure control stability and high precision. 32-bit floating-point DSP processor with primary frequency up to 300MHz and 24-bit resolution ADC/DAC are used for hardware in coordination with high precision floating-point digital filtering and low noise design technology of hardware circuit. The dynamic random control range of the controller is more than 90dB and the signal to noise ratio is more than 100dB.

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