CN2150539Y - Small servo vibration stand system - Google Patents
Small servo vibration stand system Download PDFInfo
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- CN2150539Y CN2150539Y CN 92243429 CN92243429U CN2150539Y CN 2150539 Y CN2150539 Y CN 2150539Y CN 92243429 CN92243429 CN 92243429 CN 92243429 U CN92243429 U CN 92243429U CN 2150539 Y CN2150539 Y CN 2150539Y
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- servo
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- relative velocity
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Abstract
The utility model relates to a small servo vibration stand system which is applicable to a sensor with low frequency vibration. The utility model comprises a horizontal servo vibrating platform, a vertical vibrating platform and a servo measuring system, wherein, the minitype horizontal and the minitype vertical vibrating platforms are respectively provided with speed gauges which correspond to each other; the vertical vibrating platform is provided with a reciprocating guide reed and a vertical regulating spring; the servo measuring system has the integrative fiunctions of a signal generator, a power amplifier, servo feedback and voltage measurement for multi-path signals. Therefore, the cost is reduced, and the efficiency is increased. The utility model makes the active servo technology apply to a portable vibrating platform, so the low-frequency performance of the vibrating platform is largely extended, the stability of the portable vibrating platform is improved, and the distortion degrree is improved.
Description
The utility model relates to vibration measurement equipment, and it is easy to carry for low frequency or ultralow frequency vibro-pickup provide a kind of, cheap, function admirable, calibration facility easy to use.
Demarcation for the ultralow frequency vibro-pickup, existing corresponding apparatus--" the superlow frequency vibrating standard set-up " of engineering mechanics research institute, but it is bulky, (about 700,000 yuan) cost an arm and a leg, the utility model has all had bigger change at method and structure in form, in theory with reference to engineering mechanics article " DCJ type servo type accelerometer ".
The purpose of this utility model is a kind of novel small-sized servo vibration table of design system, and the demarcation problem of realization ultralow frequency vibro-pickup on the compact electromagnetic shaking table that solves that past do not solve is convenient and practical, accurately and reliably, easy to carry, cheap, be convenient to field condition and use.
Task of the present utility model realizes as follows, by small-sized level to shaking table, small-sizedly vertically form this system to shaking table and servo measurement mechanism.Small-sized level to shaking table with small-sized vertically on shaking table, respectively be equipped with a relative velocity meter, and with this velograph with collect the servo measurement mechanism that signal generator, servoamplifier, power amplifier, multichannel crest voltage be measured as one (in the little plastic casing that is complementary with it of packing into) and be connected, and feeding back to the moving-coil of exciting head, formation can be demarcated the small-sized servo vibration table system of ultralow frequency vibro-pickup.The relative velocity meter of said horizontal vibration platform is to be contained on the central axis of exciting head and level table, and its moving-coil is installed in an end of level table, and magnetic circuit is installed on the shaking table base, forms the relative velocity meter.The relative velocity meter of said vertical vibration platform is mounted on the axis of exciting head and connecting rod, and on the cross bar that moving-coil is fixed on table top is connected, magnetic circuit is installed on the entablature that is connected as a single entity with base, forms the relative velocity meter.Small-sized vertical to there being two groups four reciprocating type guiding reeds to be fixed on the vertical beam and connecting rod that fuses with base on the shaking table, there are two vertical adjustment springs to hang on entablature and the cross bar.
Its task also is the active servo feedback technique is applied in the small vibrating platform, the moving-coil of relative velocity meter is inserted the input end of servoamplifier, the moving-coil of exciting head is inserted the output terminal of effect amplifier, form servo vibration table, output voltage signal with the relative velocity meter takes out in addition, after impedance conversion as the standard speed voltage of table top, through behind integration as the standard displacement voltage of table top.
The principle of work of this system is: moving-coil (5) or (16) by the relative velocity meter link to each other with servoamplifier (19) input end, and exciting head moving-coil (3) or (10) link to each other with the output terminal of power amplifier (20), form servo vibration table.The sine voltage signal that is produced 0.1-100Hz by signal generator (18) promotes shaking table through servoamplifier (19), power amplifier (20).The input signal of impedance transformer (21) and integrator (22) all is taken from the output voltage of relative velocity meter, output is proportional to the voltage signal of table top speed (X) and table top displacement (X) respectively, is used as the standard speed and the standard displacement voltage of this system.Crest voltage is measured (23) can distinguish measurement standard speed and normal bit shifting signal voltage and vibration table (7) or (11) last output voltage of being marked vibro-pickup.
When connecting system power supply, when increasing the gain of servoamplifier, system has formed big damping ratio system, principle as shown in Figure 4, its damping ratio is:
D＝ (G
1G
2K)/(2M
1n
1R) ＞＞1
G in the formula
1, G
2Be respectively the electromechanical coupling factor of relative velocity meter and exciting head part, M
1, n
1=2 π f
1And R is respectively the quality of motion parts, the mechanical natural frequency of vibration and loop resistance.K=R
f/ R
1Enlargement factor for servoamplifier.
The shaking table low-frequency minimum is:
j
Down=
Therefore the shaking table low-frequency minimum can be adjusted easily with the enlargement factor of servoamplifier.
Work as generator output voltage, after promoting the shaking table motion, the output signal of relative velocity meter is through impedance transformer and integrator, with standard speed and the normal bit shifting signal that small vibration platform table top is provided, all give crest voltage with the output voltage of being marked vibro-pickup and measure, can obtain by the sensitivity and the amplitude versus frequency characte of mark vibro-pickup.
The utility model has the advantages that: small-sized being easy to carry, can on-the-spot practical, cheap, function admirable, reliable, easy to use.Because native system has adopted servo feedback, reciprocating type guiding reed and has vertically adjusted technical measures such as spring and integrated amplifier, expanded low frequency characteristic, the characteristic and the degree of distortion of system have been improved, unstable shortcomings such as table top easily reverses, waves have been overcome, dwindle volume, improved stiffness of system and reliability.
Fig. 1 be level to the shaking table sketch, comprising:
Base (1), exciting head magnetic circuit (2), exciting head moving-coil (3), relative velocity meter magnetic circuit (4), relative velocity meter moving-coil (5), reed (6), table top (7).Magnetic circuit (2) and moving-coil (3) constitute the exciting head.Magnetic circuit (4) and moving-coil (5) form the relative velocity meter.
Fig. 2, comprising to the shaking table sketch for vertically:
Base (8), exciting head magnetic circuit (9), exciting head moving-coil (10), table top (11), reciprocating type reed (12), connecting link (13) is vertically adjusted spring (14), relative velocity meter magnetic circuit (15), relative velocity meter moving-coil (16), cross bar (17).Magnetic circuit (9) and moving-coil (10) form the exciting head.Magnetic circuit (15) and moving-coil (16) form the relative velocity meter.
Fig. 3 is the electrical principle block scheme of the servo measurement mechanism of native system, comprising:
Signal generator (18), servoamplifier (19), integrated power amplifier (20), impedance transformer (21), integrator (22), crest voltage is measured (23), vibration table (7) or (11), relative velocity meter moving-coil (5) or (16), exciting head moving-coil (3) or (10).
Fig. 4 is the servoamplifier schematic diagram of the big damping ratio of formation system, comprising:
The electromechanical coupling factor G of relative velocity meter
1, the electromechanical coupling factor G of exciting head part
2, the resistance R relevant with the servoamplifier enlargement factor
1, R
fWith output loop all-in resistance R.
Claims (6)
1, a kind of small-sized servo vibration table system, it comprises that small-sized level is to shaking table, small-sized vertically to shaking table and servo measurement mechanism composition, it is characterized in that in small-sized level to shaking table and the small-sized vertical relative velocity meter that on shaking table, respectively is equipped with, this velograph be contained in the moving-coil that servo measurement mechanism that collection signal generator, servoamplifier, power amplifier, multichannel crest voltage in the little plastic casing be measured as one is connected and feeds back to the exciting head, formation can be demarcated the small-sized servo vibration table system of ultralow frequency vibro-pickup.
2,, it is characterized in that the moving mutually velograph of said small-sized horizontal vibration platform is mounted on the central axis of exciting head and level table as right 1 described system.Its moving-coil is installed in an end of level table, and magnetic circuit is contained on the shaking table base, forms the relative velocity meter.
3, as right 1 fast system, the relative velocity meter that it is characterized in that small-sized vertical vibration platform is arranged on the axis of shaking table exciting head and connecting rod, on the cross bar that moving-coil is fixed on table top is connected, magnetic circuit is installed on the entablature that is connected as a single entity with base, forms the relative velocity meter.
4,, it is characterized in that described small-sized vertical vibration platform has two groups four reciprocating type guiding reeds to be fixed on the vertical beam and connecting rod that fuses with base, has two vertical adjustment springs to hang on entablature and the cross bar as right 1,3 described systems.
5, as claim 1,2,3 described systems, it is characterized in that the moving-coil of said relative velocity meter inserts the input end of servoamplifier, the output terminal with the moving-coil access power amplifier of exciting head forms the servo-type shaking table.
6, as claim 1,2,3 described systems, the output voltage signal that it is characterized in that the relative velocity meter is through the standard speed voltage of impedance transformer as table top, through behind integration as the standard displacement voltage of table top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92243429 CN2150539Y (en) | 1992-11-24 | 1992-11-24 | Small servo vibration stand system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92243429 CN2150539Y (en) | 1992-11-24 | 1992-11-24 | Small servo vibration stand system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2150539Y true CN2150539Y (en) | 1993-12-22 |
Family
ID=33782983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92243429 Expired - Fee Related CN2150539Y (en) | 1992-11-24 | 1992-11-24 | Small servo vibration stand system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2150539Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100491948C (en) * | 2005-09-21 | 2009-05-27 | 苏州东菱振动试验仪器有限公司 | Moving coil dynamic balance control method |
| CN106959196A (en) * | 2017-03-21 | 2017-07-18 | 中国地震局工程力学研究所 | A kind of servo vibration table and control method |
| WO2021258557A1 (en) * | 2020-06-24 | 2021-12-30 | 苏州苏试试验集团股份有限公司 | Dual-output electric vibration table |
-
1992
- 1992-11-24 CN CN 92243429 patent/CN2150539Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100491948C (en) * | 2005-09-21 | 2009-05-27 | 苏州东菱振动试验仪器有限公司 | Moving coil dynamic balance control method |
| CN106959196A (en) * | 2017-03-21 | 2017-07-18 | 中国地震局工程力学研究所 | A kind of servo vibration table and control method |
| WO2021258557A1 (en) * | 2020-06-24 | 2021-12-30 | 苏州苏试试验集团股份有限公司 | Dual-output electric vibration table |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |