CN201340444Y - Module for detecting residual voltage frequency of generator - Google Patents
Module for detecting residual voltage frequency of generator Download PDFInfo
- Publication number
- CN201340444Y CN201340444Y CNU2008200422569U CN200820042256U CN201340444Y CN 201340444 Y CN201340444 Y CN 201340444Y CN U2008200422569 U CNU2008200422569 U CN U2008200422569U CN 200820042256 U CN200820042256 U CN 200820042256U CN 201340444 Y CN201340444 Y CN 201340444Y
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- circuit
- frequency
- residual voltage
- module
- generator
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Abstract
The utility model discloses a module for detecting residual voltage frequency of a generator, which comprises a voltage stabilizer, a sampling circuit and an amplifying circuit and characterized by further comprising a protection circuit, an alignment circuit and a wave shaping output circuit, wherein the protection circuit comprises a hall sensor; the alignment circuit comprises an operational amplifier and a lagging comparator; the wave shaping output circuit comprises a comparator; and each circuit is connected with the former and later circuit through base pins led by the module. The utility model solves the problems in accurately and reliably detecting signal frequency of amplitude and frequency of generator residual voltage signal with ultra-low amplitude and ultra-low frequency in a wide range.
Description
Technical field
The utility model relates to the detection module of the electric mode residual voltage signal frequency that tests the speed of a kind of rotating speed measure and control device, especially relates to a kind of generator residual voltage frequency detection module.
Background technology
Continuous progress along with generating set automatic control system; measure with the reliability requirement of protection more and more higher to generating unit speed; present most of speed measuring device all adopts machinery and electric two kinds of measuring principles in same device; because the signals that adopt modes such as PT mutual inductor or electric resistance partial pressure that the residual voltage conversion of signals is handled for suitable subsequent conditioning circuit during electric testing the speed more; so just cause the residual voltage signal at the ultralow width of cloth; be difficult to during ultralow frequency measure accurately and reliably; though the PT that gathers small-signal or circuit are arranged but can not satisfy the signal measurement of residual voltage signal amplitude when higher; the mode that has a lot of unit speed measuring devices to adopt mechanical measuring principle to combine with electric measuring principle; when low frequency, get mechanical measuring principle; power taking gas measuring principle during high frequency, come that assurance device measures when ultralow width of cloth ultralow frequency accurately and precision.Reliability, accuracy and dirigibility to device all produced bad influence like this.
Therefore, require again simultaneously to guarantee that for how measuring accurately and reliably when the ultralow width of cloth ultralow frequency of residual voltage signal the residual voltage signal amplitude has just become a problem demanding prompt solution with frequency measurement accurately and reliably in the scope of a broad.
Summary of the invention
1, goal of the invention
The utility model proposes a kind of generator residual voltage frequency detection module at the deficiencies in the prior art, all can measure accurately and reliably in the scope at ultralow width of cloth ultralow frequency of generator residual voltage signal and broad.
2, technical scheme
The utility model is a kind of detection module at generator residual voltage frequency, is mainly used in to be difficult to the detection problem of survey frequency accurately and reliably when solving generator residual voltage signal ultralow frequency, the ultralow width of cloth.This modular circuit is made up of voltage stabilizer, sample circuit, amplifying circuit, holding circuit, adjustment circuit and shaping output circuit.Described holding circuit comprises a Hall element; Described adjustment circuit comprises an operational amplifier and a hysteresis comparator; Described shaping output circuit comprises a comparer.
3, beneficial effect
The utility model has solved the problem that signal frequency is measured accurately and reliably in the ultralow width of cloth of generator residual voltage signal, ultralow frequency and signal amplitude, the frequency wide region.The utility model module has that encapsulation volume is little, measurement range is wide, measures accurately and reliably, antijamming capability is strong and characteristics such as low cost, provides a kind of cost performance very high detection method for requiring more and more higher generating unit speed measure and control device.In addition, if remove special transformer T1, Hall element waits the magnetic field intensity of change detected such as distance by other modes, simultaneously Hall element subsequent conditioning circuit and parameter are carried out suitable adjustment, can constitute different types of Hall switch circuit, survey frequency can satisfy the measuring ability that most of Hall elements are made switch up to tens K.For subsequent process circuit provides reliably detection signal accurately.
Description of drawings
Fig. 1 is a synoptic diagram of the present utility model
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
Generator residual voltage signal IN1, IN2 introduce special transformer T1 winding, in the T1 iron core, produce alternating magnetic field B, magnetic field B by Hall element IC1 change detected, when nothing adds the residual voltage signal, special transformer fe does not have magnetic field in the heart, Hall element IC1 exports a stable magnitude of voltage U, when IN1, IN2 have the input of residual voltage signal, produce alternating magnetic fields in the T1 iron core, IC1 detects the magnetic field of variation, its output voltage is corresponding to change, and its Changing Pattern is to rise or descend from U, and the magnitude of voltage that rises or descend is relevant with the polarity and the intensity in magnetic field.
Adjusting circuit adopts high performance amplifier to constitute amplification and hysteresis comparator functional circuit, the voltage signal that samples is handled, export the break-make that the switching signal identical with frequency input signal controlled triode again after the high-performance comparer constitutes shaping circuit, final module output is with the switching signal of frequency input signal unanimity.
By calculating and suitably choose device, this module can reliably be measured in 0.2V≤Uin≤250V (this value is effective value, corresponding voltage peak-to-peak value 0.566V-707V), the signal frequency of frequency in 0.1Hz≤F≤150Hz accurately to amplitude.This use novel plug IC circuit device is SO8 and SO14 encapsulation, resistance, capacitor element are 0805 encapsulation, all the other device overwhelming majority all adopt less Surface Mount encapsulation, these devices are welded on the less PCB wiring board, and place the metallic shield cure package, form modularized circuit, 5 pins of drawing by module are finished with the front and back circuit and are connected.Each circuit part of the utility model module all has holding circuit in addition, as imports anti-differential mode, common mode holding circuit, and amplifier holding circuit etc. have strengthened the reliability of modular circuit.The utlity model has that volume is little, measuring accuracy is high, measurement range is wide, good reliability, antijamming capability is strong and when ultralow frequency, the ultralow width of cloth and all can measure the characteristics of frequency input signal in the amplitude frequency wide region accurately and reliably.
To the input signal amplitude in 0.2V≤Uin≤250V (effective value) scope, frequency all can measure frequency input signal accurately and reliably in 0.1Hz≤F≤150Hz scope, general electric residual voltage signal all is sinusoidal wave, for the utility model input signal also can be non-sinusoidal wave, but cannot be the pulse signal that step changes, input signal should be about exchanging the balancing waveform at zero point.In actual applications, be prevent that the input signal amplitude is higher time damage internal components and circuit, input signal need be by external current-limiting resistance shown in figure below, and the resistance value of R1, R2 is chosen, and needs to satisfy the electric current that flows into this use modular circuit and be no more than 200mA.
Claims (1)
1, a kind of generator residual voltage frequency detection module comprises voltage stabilizer, sample circuit, amplifying circuit, it is characterized in that, also comprises holding circuit, adjusts circuit and shaping output circuit, and wherein, described holding circuit comprises a Hall element; Described adjustment circuit comprises an operational amplifier and a hysteresis comparator; Described shaping output circuit comprises a comparer; The pin that foregoing circuit is drawn by module is connected with the front and back circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200422569U CN201340444Y (en) | 2008-07-29 | 2008-07-29 | Module for detecting residual voltage frequency of generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200422569U CN201340444Y (en) | 2008-07-29 | 2008-07-29 | Module for detecting residual voltage frequency of generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201340444Y true CN201340444Y (en) | 2009-11-04 |
Family
ID=41235987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200422569U Expired - Lifetime CN201340444Y (en) | 2008-07-29 | 2008-07-29 | Module for detecting residual voltage frequency of generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201340444Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459310A (en) * | 2014-10-24 | 2015-03-25 | 航天科工深圳（集团）有限公司 | Alternating voltage frequency acquisition device |
| CN114859071A (en) * | 2022-06-14 | 2022-08-05 | 北京斯年智驾科技有限公司 | Wheel speed acquisition module, device and method |
-
2008
- 2008-07-29 CN CNU2008200422569U patent/CN201340444Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459310A (en) * | 2014-10-24 | 2015-03-25 | 航天科工深圳（集团）有限公司 | Alternating voltage frequency acquisition device |
| CN114859071A (en) * | 2022-06-14 | 2022-08-05 | 北京斯年智驾科技有限公司 | Wheel speed acquisition module, device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20171207 Address after: 211106 Jiangning City, Nanjing Province, the integrity of the road No. 19, Co-patentee after: NARI TECHNOLOGY Co.,Ltd. Patentee after: STATE GRID ELECTRIC POWER Research Institute Address before: Nan Shui Road Gulou District of Nanjing city of Jiangsu Province, No. 8 210003 Co-patentee before: NANJING NARI Group Corp. Patentee before: STATE GRID ELECTRIC POWER Research Institute Effective date of registration: 20171207 Address after: Nan Shui Road Gulou District of Nanjing city of Jiangsu Province, No. 8 210003 Co-patentee after: NANJING NARI Group Corp. Patentee after: STATE GRID ELECTRIC POWER Research Institute Address before: Nan Shui Road Gulou District of Nanjing city of Jiangsu Province, No. 8 210003 Co-patentee before: Nanjing Nanrui Automatic Control Co.,Ltd. Patentee before: STATE GRID ELECTRIC POWER Research Institute |
|
| CX01 | Expiry of patent term |
Granted publication date: 20091104 |
|
| CX01 | Expiry of patent term |