CN102967361B - Calibrating device and method for high-frequency high-amplitude vibrating sensor - Google Patents

Abstract

The invention relates to a calibrating device and method for a high-frequency high-amplitude vibrating sensor and belongs to the field of vibrating sensor calibration. The device comprises a signal generator, a power amplifier, a first excitation coil, a resonance beam, a clamp, a second excitation coil, a direct-current stabilized power supply, a standard sensor, a calibrated sensor, a signal conditioner, a vibration meter, a first digital multimeter and a second digital multimeter, wherein the calibrated sensor and the vibration meter form a calibrated goal device. The calibrating device has the advantages of being small in size, small in energy consumption, long in service life and good in standard. The calibrating device stimulates high-frequency high-amplitude vibration, and the frequency range and vibration amplitude are large.

Description

The high amplitude Vibrating Sensor Calibration of high frequency device and method

Technical field

The invention belongs to Vibrating Sensor Calibration field, be specifically related to the high amplitude Vibrating Sensor Calibration of a kind of high frequency device and method.

Background technology

Up to now, at aviation field, external domestic manufacturer is mainly adopting cold water standard vibration machine aspect the high amplitude Vibrating Sensor Calibration of high frequency, this equipment volume is large, it is high to consume energy, life cycle is short, standard is poor, and especially to reach standard vibration machine more than 200g be almost a blank to vibration amplitude.

Summary of the invention

For the deficiencies in the prior art, the present invention proposes the high amplitude Vibrating Sensor Calibration of a kind of high frequency device and method, reduces device volume, reduces the object that consumes energy, extends life cycle, raising standard, expansion survey frequency scope and improve vibration amplitude to reach.

The high amplitude Vibrating Sensor Calibration of a kind of high frequency device, comprises signal generator, power amplifier, the first field coil, resonance beam, fixture, the second field coil, D.C. regulated power supply, standard transducer, by school sensor, signal conditioner, vialog, the first digital multimeter and the second digital multimeter; Wherein,

Be calibrated destination apparatus by school sensor and vialog composition;

The output terminal of signal generator connects the input end of power amplifier, the output terminal of above-mentioned power amplifier connects the input end of the first field coil, the iron core opening of the first field coil is just to resonance beam, described resonance beam is fixed on fixture, described fixture lower end is wound around the second field coil, and the input end of the second field coil connects the output terminal of D.C. regulated power supply; The lower end of described resonance beam is provided with standard transducer, and upper end is provided with by school sensor; The output terminal of described standard transducer connects the input end of signal conditioner, and the output terminal of above-mentioned signal conditioner connects the input end of the first digital multimeter; The described input end that is connected vialog by the output terminal of school sensor, the output terminal of described vialog connects the input end of the second digital multimeter.

The method that adopts the high amplitude Vibrating Sensor Calibration of high frequency device to calibrate, comprises the following steps:

Step 1, the position of the required natural frequency of definite calibration in resonance beam, at this frequency location installation code sensor of resonance beam lower end, install by school sensor upper end;

Step 2, starter gear, turn generator output voltage down, has output signal; According to target natural frequency conditioning signal generator, the sine wave signal frequency that makes its output in target natural frequency ± 5% scope in, and within the scope of this, finely tune the frequency of output signal, until reaching maximal value, the first digital multimeter voltage output value reaches the true resonant frequency of resonance beam;

Step 3, according to the voltage check point target value of standard transducer, conditioning signal generator, makes the voltage output value of the first digital multimeter reach voltage check point target value;

Step 4: regulate vialog, make the voltage output value of the second digital multimeter identical with the corresponding vibration amplitude of voltage output value of the first digital multimeter, the device that is calibrated that now vialog and sensor form is specification product.

Advantage of the present invention:

The high amplitude Vibrating Sensor Calibration of a kind of high frequency of the present invention device and method, has that device volume is little, the feature little, that life cycle is long, standard is good that consumes energy, and this device inspires the vibration of the high amplitude of high frequency, and frequency range and vibration amplitude are larger.

Accompanying drawing explanation

Fig. 1 is the high amplitude Vibrating Sensor Calibration of an embodiment of the present invention high frequency apparatus structure block diagram;

Wherein, 1-signal generator, 2-power amplifier; 3-the first field coil; 4-resonance beam; 5-fixture; 6-the second field coil; 7-D.C. regulated power supply; 8-standard transducer; 9-is by school sensor; 10-signal conditioner; 11-vialog; 12-the first digital multimeter; 13-the second digital multimeter;

Fig. 2 is the high amplitude Vibrating Sensor Calibration of an embodiment of the present invention high frequency device circuit schematic diagram;

Fig. 3 is first resonant beam structure of an embodiment of the present invention figure;

Fig. 4 is second resonant beam structure figure of an embodiment of the present invention;

Fig. 5 is the high amplitude Vibrating Sensor Calibration of an embodiment of the present invention high frequency method flow diagram.

Embodiment

Below in conjunction with accompanying drawing, the embodiment of the present invention is described further.

The present invention is according to resonance beam theory, the natural mode of vibration that applied analysis is calculated, and the resonance characteristics of application 3000Hz～7000Hz frequency band, the high amplitude Vibrating Sensor Calibration of high frequency device has been created in design.

As shown in Figure 1, the high amplitude Vibrating Sensor Calibration of a kind of high frequency device, comprises signal generator 1, power amplifier 2; The first field coil 3; Resonance beam 4; Fixture 5; The second field coil 6; D.C. regulated power supply 7; Standard transducer 8; By school sensor 9; Signal conditioner 10; Vialog 11; The first digital multimeter 12 and the second digital multimeter 13; Wherein,

Be calibrated destination apparatus by school sensor 9 and vialog 11 compositions;

As shown in Figure 2, the output terminal bnc interface sine wave output signal of signal generator 1 is to the input end Line OUT of power amplifier 2, the positive terminal of the output terminal OUTPUT of above-mentioned power amplifier 2 connects the electrode input end of the first field coil 3, and the negative pole end of the output terminal OUTPUT of power amplifier 2 connects the negative input of the first field coil 3; The iron core opening of the first field coil 3 is just to resonance beam 4, described resonance beam 4 is fixed on fixture 5, described fixture 5 lower ends are wound around the second field coil 6, the electrode input end of the second field coil 6 connects the cathode output end of D.C. regulated power supply 7, and the negative input of the second field coil 6 connects the cathode output end of D.C. regulated power supply 7; The lower end of described resonance beam 4 is provided with standard transducer 8, and upper end is provided with by school sensor 9; The output terminal bnc interface of described standard transducer 8 connects the input end SENSOR of signal conditioner 10, the anodal electrode input end that connects the first digital multimeter 12 of output terminal OUTPUT of above-mentioned signal conditioner 10, the output terminal OUTPUT negative pole of signal conditioner 10 connects the negative input of the first digital multimeter 12; Described by the output terminal 1 of school sensor 9; 2 and 4 are connected respectively the input end 1 of vialog 11; 2 and 4, the anodal electrode input end that connects the second digital multimeter 13 of output terminal bnc interface of described vialog 11, the output terminal bnc interface negative pole of vialog 11 connects the negative input of the second digital multimeter 13.

In the embodiment of the present invention, signal generator 1 is selected WF1943A model; Power amplifier 2 is selected PA-1000W model; D.C. regulated power supply 7 is selected DH1716A model; Standard transducer 8 is selected PCB model; Signal conditioner 10 is selected PCB model; Vialog 11 is selected CZY model; The first digital multimeter 12 and the second digital multimeter 13 are selected HP34401A model.

Under the control of signal generator 1, the first field coil 3 produces high strength alternating magnetic field, resonance beam 4 is " L " type structure, after the perfectly straight stream electric current of voltage regulation of the second field coil 6, resonance beam 4 is magnetized, resonance beam 4 two ends have electrode, and the alternating magnetic field direction producing with the first field coil 3 is orthogonal, during by electric current, will produce the Ampère force of resonance beam 4 thickness directions, resonance beam 4 produces natural frequency resonance, inspire the high amplitude vibration of multiple frequencies, standard transducer 8 and the assigned address that is calibrated sensor 9 and is installed on back-to-back resonance beam 4, calibrate and be calibrated sensor by standard transducer.

Described resonance beam 4 can be porose resonance beam or atresia resonance beam.

As shown in Figure 3, be first resonance beam of embodiment of the present invention employing, wherein, the position that install for the first time for sensor position 1, the position that install for the second time for sensor position 2.In the time that the frequency of first resonance beam does not reach target frequency, change second resonance beam, as shown in Figure 4, for second resonance beam of embodiment of the present invention employing, the size of this resonance beam is different from first resonance beam, wherein, the position that install for the first time for sensor position 3, the position that install for the second time for sensor position 4.The resonance beam performance data adopting in the embodiment of the present invention is as shown in table 1:

Table 1

Part	Material	Density/kgm -3	Elastic modulus/Pa	Poisson ratio
					Resonance beam	No. 45 steel	7810	2e11	0.3

In the embodiment of the present invention, be calculated as resonance beam modal calculation, do not consider self gravitation, without external applied load, autonomous back end (without cantilever place) is completely fixed in 30mm region downwards, applies full constraint.In order to facilitate the installation of sensor, be provided with installation screw at the resonant position of resonance beam 4, carry out resonance beam modal calculation by and two kinds of situations of atresia porose to resonance beam 4, result is as shown in table 2:

Table 2

Order frequency Hz	Resonance beam 1 (porose)	Resonance beam 1 (atresia)	Resonance beam 2 (porose)	Resonance beam 2 (atresia)
					f1	238．342	236．934	251.31	24948
f2	858．386	867.80	982．80	990．38
					f3	895.d09	890．87	1161．1	1150．7
f4	1739	1739．3	1738．3	1733．1
					f5	2183	2226．6	2888．7	3027.9
f6	3468	3551．7	3215.0	3321．5
					f7	4627	4646．1	4713.7	4696．4
f8	5385	5391．4	5855.4	5914.1
					f9	6347	6411．5	6255．1	62418
f10	7205	7188.2	7343.6	7316．3

As shown in Table 2, resonance beam punching is little to its performance impact.

In the embodiment of the present invention, find out the not resonance frequency of coordination of resonance beam by software, resonance beam lower surface is positioned at XY plane, little cantilever is directions X, Z axis is perpendicular to lower surface, and first resonance beam is under the 5th rank natural frequency to the ten rank natural frequencys, and its formation feature is:

The 5th rank formation: little cantilever end swings around Z axis in XY plane, more arrives end and is out of shape larger.

The 6th rank formation: girder reverses (one turns round) around XY plane middle one vertical curve, and little cantilever swings thereupon, more arrives end and is out of shape larger.

The 7th rank formation: it is curved that girder prolongs Y-direction three, on girder, two point deformation are larger.

The 8th rank formation: girder is two curved in XY plane, and little cantilever swings up and down thereupon, on girder a bit; Little cantilever two point deformation are larger.

The 9th rank formation: girder has two reverse torsions around XY plane middle one vertical axis, two turns round, and little cantilever end prolongs X to swing, little cantilevered distal end distortion is maximum.

The tenth rank formation: girder prolongs Y-direction and pumps, little cantilever swings up and down thereupon, and the two direction of motion is contrary, and corner and the distortion of little cantilevered distal end are maximum.

Second resonance beam the 5th rank to the ten rank formation feature is:

The 5th seven rank, rank to the; The tenth rank formation is consistent with first resonance beam, and the 8th rank formation is consistent with first resonance beam the 9th rank formation, and the 9th rank formation is consistent with first resonance beam the 8th rank formation.

The method that adopts the high amplitude Vibrating Sensor Calibration of high frequency device to calibrate, as shown in Figure 5, comprises the following steps:

Step 1; Determine the position of the required natural frequency of calibration in resonance beam, at this frequency location installation code sensor of resonance beam lower end, install by school sensor upper end;

The embodiment of the present invention adopts ANSYS finite element software to determine the position of the required natural frequency of calibration in resonance beam.

Step 2; Starter gear, turns generator output voltage down, has output signal; According to target natural frequency conditioning signal generator, the sine wave signal frequency that makes its output in target natural frequency ± 5% scope in, and within the scope of this, finely tune the frequency of output signal, until reaching maximal value, the first digital multimeter voltage output value really reaches the true resonant frequency of resonance beam;

Step 3; According to the voltage check point target value of standard transducer, conditioning signal generator, makes the voltage output value of the first digital multimeter reach voltage check point target value;

Step 4: regulate vialog, make the voltage output value of the second digital multimeter identical with the corresponding vibration amplitude of voltage output value of the first digital multimeter, the device that is calibrated that now vialog and sensor form is specification product.

Frequency and amplitude range that table 3 excites for apparatus of the present invention.

Table 3

Claims (2)

1. the high amplitude Vibrating Sensor Calibration of a high frequency device, it is characterized in that: comprise signal generator (1), power amplifier (2), the first field coil (3), resonance beam (4), fixture (5), the second field coil (6), D.C. regulated power supply (7), standard transducer (8), by school sensor (9), signal conditioner (10), vialog (11), the first digital multimeter (12) and the second digital multimeter (13); Wherein,

Be calibrated destination apparatus by school sensor (9) and vialog (11) composition;

The output terminal of signal generator (1) connects the input end of power amplifier (2), the output terminal of above-mentioned power amplifier (2) connects the input end of the first field coil (3), the iron core opening of the first field coil (3) is just to resonance beam (4), described resonance beam (4) is fixed on fixture (5), described fixture (5) lower end is wound around the second field coil (6), and the input end of the second field coil (6) connects the output terminal of D.C. regulated power supply (7); The lower end of described resonance beam (4) is provided with standard transducer (8), and upper end is provided with by school sensor (9); The output terminal of described standard transducer (8) connects the input end of signal conditioner (10), and the output terminal of above-mentioned signal conditioner (10) connects the input end of the first digital multimeter (12); The described input end that is connected vialog (11) by the output terminal of school sensor (9), the output terminal of described vialog (11) connects the input end of the second digital multimeter (13).

2. the method that adopts the high amplitude Vibrating Sensor Calibration of high frequency claimed in claim 1 device to calibrate, is characterized in that: comprise the following steps:

Step 1, the position of the required natural frequency of definite calibration in resonance beam, at this position installation code sensor of resonance beam lower end, install by school sensor upper end;

Step 2, starter gear, turn generator output voltage down, has output signal; According to the required natural frequency conditioning signal generator of calibration, the sine wave signal frequency that makes its output in calibrate required natural frequency ± 5% scope in, and within the scope of this, finely tune the frequency of output signal, until reaching maximal value, the first digital multimeter voltage output value reaches the true resonant frequency of resonance beam;

Step 3, according to the voltage check point target value of standard transducer, conditioning signal generator, makes the voltage output value of the first digital multimeter reach voltage check point target value;

Step 4: regulate vialog, make the voltage output value of the second digital multimeter identical with the corresponding vibration amplitude of voltage output value of the first digital multimeter, the device that is calibrated that now vialog and sensor form is specification product.

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