CN204807191U - Vibration of two -wire system casing becomes send table - Google Patents
Vibration of two -wire system casing becomes send table Download PDFInfo
- Publication number
- CN204807191U CN204807191U CN201520529827.1U CN201520529827U CN204807191U CN 204807191 U CN204807191 U CN 204807191U CN 201520529827 U CN201520529827 U CN 201520529827U CN 204807191 U CN204807191 U CN 204807191U
- Authority
- CN
- China
- Prior art keywords
- circuit
- wire system
- current
- vibration transmission
- transmission table
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000012545 processing Methods 0.000 claims abstract description 16
- 230000001133 acceleration Effects 0.000 claims abstract description 7
- 230000005540 biological transmission Effects 0.000 claims description 22
- 238000001914 filtration Methods 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 abstract description 9
- 238000007689 inspection Methods 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 238000013519 translation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The utility model relates to a vibration of two -wire system casing becomes send table, including filter circuit, alternating current signal amplifier circuit, mould / number converting circuit, a central processing unit, number / mould converting circuit and the current output circuit who connects gradually, filter circuit's input is equipped with the sensor input terminal, the sensor input terminal is connected with constant current source sensor supply circuit's output, current output circuit's output is equipped with current outgoing terminal and junction current feedback circuit's input, current feedback circuit's output is connected current output circuit's input, current output circuit and current feedback circuit constitute two -wire system VI converter. The utility model discloses cooperation acceleration sensor speedtransmitter can be used to the vibration of automated inspection casing, has sparingly advantages such as cost, wiring convenience, low -power consumption, has higher reliability, flexibility and interference killing feature, for the normal operating of managing unit equipment provides simply, efficient monitoring scheme.
Description
Technical field
The utility model relates to a kind of two-wire system casing vibration transmission table, can accept the signal input of acceleration/speed pickup.
Background technology
Large rotating machinery is widely used in nearly all industrial sector such as electric power, petrochemical industry, metallurgy, manufacture, aviation, is the crucial power-equipment in producing, very large on safety in production impact.In practical application, owing to there is the unavoidable factors such as many such as wearing and tearing, rotating machinery often there will be various fault; so that reduce or lose its predetermined function; even may cause serious accident, cause huge economic loss and even casualties, produce serious social influence.
Vibration is the main cause of rotating machinery fault, and different types of fault can show to some extent on the signal of vibration.Therefore, the generation that vibration monitoring just effectively can reduce above-mentioned situation is carried out to rotating machinery, ensure the safe and highly efficient operation of machinery and equipment.By the vibration signal of Real-Time Monitoring rotating machinery, and treatment and analysis in addition, just can grasp the information such as running status and development trend of equipment at any time.These information contribute to related personnel and pinpoint the problems in rotating machinery generation catastrophic failure or before leading to major accident, and in addition maintenance and repair in advance, thus can effectively avoid major accident to occur.General signal monitoring instrument, majority is simulation detection system, more complicated, has that cost is high, poor reliability, the life-span is short, sensitivity is low, limitation is large, without shortcomings such as communication interfaces when monitoring large complicated unit.
Summary of the invention
In order to overcome the above-mentioned defect under prior art, the purpose of this utility model is to provide a kind of two-wire system casing vibration transmission table, there is advantages such as saving cost, easy-to-connect, low-power consumption, this change simultaneously send table can dock multiple sensors system, there is higher reliability, dirigibility and antijamming capability, providing simply for managing the normal operation of unit equipment, efficient monitoring scheme.
The technical solution of the utility model is:
A kind of two-wire system casing vibration transmission table, comprise the filtering circuit connected successively, AC signal amplifying circuit, analog/digital conversion circuit, CPU (central processing unit), D/A switch circuit and current output circuit, the input end of described filtering circuit is provided with sensor input, described sensor input is connected with the output terminal of constant current source sensor feed circuit, the output terminal of described current output circuit is provided with current output terminal and connects the input end of current feedback circuit, the output terminal of described current feedback circuit connects the input end of described current output circuit, described current output circuit and current feedback circuit form two-wire system V/I transducer.
Described two-wire system casing vibration transmission table is also provided with original signal Buffer output circuit, and the signal input part of described original signal Buffer output circuit is electrically connected with described sensor input.
Described two-wire system casing vibration transmission table can also be provided with keyboard control circuit, and the output terminal of described keyboard control circuit connects the keyboard control signals input end of described CPU (central processing unit).
Described CPU (central processing unit) adopts microprocessor or chip.
Described current output terminal preferably adopts the passive lead-out terminal of 4 ~ 20mA.
Described two-wire system casing vibration transmission table is also provided with the power supply of powering to each circuit or unit.
Described sensor input is sensor input that acceleration transducer and/or speed pickup are suitable for.
Described sensor input is for being applicable to the connection terminal of eddy current sensor.
All inner members all adopt low-power consumption components and parts.
The output line of described two-wire system V/I transducer adopts 2 twisted-pair feeders.
The beneficial effects of the utility model are: because the utility model adopts filtering circuit, AC signal amplifying circuit, analog/digital conversion circuit, CPU (central processing unit), D/A switch circuit and the current output circuit connected successively, and the input end of filtering circuit is connected with sensor input, achieve the on-line automatic collection of vibration signal, so that when there is unusual condition can and alarm, contribute to the normal operation of equipment, the damage of minimizing equipment, avoids the generation of accident.
The setting of constant current source sensor feed circuit, solves the powerup issue of sensor, also can power for filtering circuit and AC signal amplifying circuit simultaneously.
Owing to arranging current feedback circuit and forming two-wire system V/I transducer with current output circuit, voltage signal is not directly control output current, but control whole circuit self power consumption electric current, even if instrument power consumption electric current has fluctuation, but export total current can not fluctuate thereupon, but only depend on current measurement value.In other words, current feedback loop can regulate current output value according to instrument current power consumption, makes current output value only relevant with measured value.
Accompanying drawing explanation
Fig. 1 is the circuit structure block diagram of an embodiment of the present utility model.
Embodiment
See Fig. 1, a kind of two-wire system casing vibration transmission table, comprises constant current source sensor feed circuit, filtering circuit, AC signal amplifying circuit, analog/digital conversion circuit, CPU (central processing unit), D/A switch circuit, current output circuit and current feedback circuit.
Sensor input and described constant current source sensor feed circuit are arranged on the front end of described filtering circuit, and sensor input is sensor input that acceleration transducer and/or speed pickup are suitable for.Described two-wire system casing vibration transmission table is also provided with original signal Buffer output circuit, and the signal input part of described original signal Buffer output circuit is electrically connected with described sensor input.
During use, tested machine case bores a mounting hole, surface of shell is tightened to by switching screw degree of will speed up/speed pickup supporting with connecting thread on acceleration/speed pickup, degree of will speed up/speed sensor cable and described sensor input sub-connection, described constant current source sensor feed circuit are to sensor power, and sensor will export the d. c. voltage signal of about 12VDC.Then when casing vibrates, sensor will vibrate together with casing, the piezoelectric crystal built-in by sensor and circuit, Oscillation Amplitude will be converted into voltage signal and export, sensor will superpose an AC signal be directly proportional to vibration amplitude and export on the bias voltage of 12VDC, signal frequency is equal to vibration frequency, and signal amplitude depends on transducer sensitivity (as 100mv/g).
Sensor output signal is leaded up to original signal Buffer output circuit and is outputted on Buffer output terminal, is generally used for presence states monitoring; Another road outputs to filtering circuit, for vibration survey.Filtering circuit will carry out high low-pass filtering to AC signal, filter the undesired signal outside useful signal frequency range.
Amplifying circuit will carry out scale amplifying to filtered AC signal, be conducive to the precision improving A/D sampling.AC analogue signal after amplification is converted to digital signal by analog/digital conversion circuit, and sends to CPU (central processing unit) by digital interface.The digital signal received is carried out calculating conversion by CPU (central processing unit), and by digital interface, transformation result is sent to D/A switch circuit.D/A switch circuit exports the DC voltage of specifying according to the digital signal received, be converted to 4-20mA electric current export through described current output circuit.
Described current output circuit is provided with current output terminal and connects current feedback circuit.The output terminal of described current feedback circuit connects the input end of described current output circuit, and described current output circuit and current feedback loop together form two-wire system V/I translation circuit, the DC voltage that D/A switch circuit exports is converted to 4-20mA and exports.Two-wire system V/I transducer and general V/I translation circuit difference are: voltage signal is not directly control output current, but control whole circuit self power consumption electric current.
The input voltage of two-wire system V/I transducer is divided into two parts: the feedback voltage of D/A switch circuit output voltage and sampling resistor.Sampling resistor Rs is connected on the low side of circuit, all electric currents all will flow back into power cathode by Rs, then when circuit power consumption curent change, the voltage on Rs also changes thereupon and affects the voltage input of V/I translation circuit as feedback voltage conversely, thus ensure that the stable of total current.For example, when instrument full scale is 5g, current measurement value is 2.5g, then 4-20mA exports be 12mA, also contains all power consumption electric currents of instrument, even if instrument power consumption electric current has fluctuation in this 12mA simultaneously, but the total current of 12mA is constant, only depends on current measurement value.
Described two-wire system casing vibration transmission table can also be provided with keyboard control circuit, and the output terminal of described keyboard control circuit connects the keyboard control signals input end of described CPU (central processing unit).
Described CPU (central processing unit) adopts microprocessor or chip.
Described current output terminal preferably adopts the passive lead-out terminal of 4 ~ 20mA.
Described two-wire system casing vibration transmission table is also provided with the power supply of powering to each circuit or unit, for powering to other circuit, to improve the reliability of system.
All inner members all adopt low-power consumption components and parts, ensure that maximum power consumption is no more than 3.75mA.
Described two-wire system casing vibration transmission table can also be provided with warning circuit, and the input end of described warning circuit connects the alarm signal output ends of described CPU (central processing unit).When the result of CPU (central processing unit) conversion meets or exceeds respective threshold, send alarm command to warning circuit, warning circuit sends instruction of reporting to the police.
The utility model only needs connection two twisted-pair feeders, and both sending table to provide power supply for becoming, is again 4-20mA output line.
The utility model can with sensor particularly acceleration transducer/speed pickup connect into two-wire system casing vibration signals collecting and device is sent in change, the signal gathered according to sensor, and signal detected in real time, analyze, become and send.It can also provide more information for on-site service personnel, as: GAP voltage etc.Mainly be adapted to the monitoring of various rotating machinery, such as steam turbine, compressor, motor, pump, fan, fan blower, hydro-extractor and generator etc., casing vibration can be measured, reporting to the police when there is unusual condition, contributing to the normal operation of equipment, reduce the damage of equipment, avoid the generation of accident.Further, the utility model good reliability, dirigibility is high, easy to use, and volume is little, has many kinds of parameters can arrange for client, can adapt to different user's requests, can substitute the monitoring and protecting system of existing backwardness very easily.
Claims (10)
1. a two-wire system casing vibration transmission table, it is characterized in that comprising the filtering circuit connected successively, AC signal amplifying circuit, analog/digital conversion circuit, CPU (central processing unit), D/A switch circuit and current output circuit, the input end of described filtering circuit is provided with sensor input, described sensor input is connected with the output terminal of constant current source sensor feed circuit, the output terminal of described current output circuit is provided with current output terminal and connects the input end of current feedback circuit, the output terminal of described current feedback circuit connects the input end of described current output circuit, described current output circuit and current feedback circuit form two-wire system V/I transducer.
2. two-wire system casing vibration transmission table as claimed in claim 1, is characterized in that also being provided with original signal Buffer output circuit, and the signal input part of described original signal Buffer output circuit is electrically connected with described sensor input.
3. two-wire system casing vibration transmission table as claimed in claim 2, it is characterized in that also being provided with keyboard control circuit, the output terminal of described keyboard control circuit connects the keyboard control signals input end of described CPU (central processing unit).
4. the two-wire system casing vibration transmission table as described in claim 1,2 or 3, is characterized in that described CPU (central processing unit) adopts microprocessor or chip.
5. two-wire system casing vibration transmission table as claimed in claim 4, is characterized in that described current output terminal adopts the passive lead-out terminal of 4 ~ 20mA.
6. two-wire system casing vibration transmission table as claimed in claim 5, is characterized in that also being provided with the power supply of powering to each circuit or unit.
7. two-wire system casing vibration transmission table as claimed in claim 6, is characterized in that described sensor input is sensor input that acceleration transducer and/or speed pickup are suitable for.
8. two-wire system casing vibration transmission table as claimed in claim 7, is characterized in that all inner members all adopt low-power consumption components and parts.
9. two-wire system casing vibration transmission table as claimed in claim 8, it is characterized in that also being provided with warning circuit, the input end of described warning circuit connects the alarm signal output ends of described CPU (central processing unit).
10. two-wire system casing vibration transmission table as claimed in claim 9, is characterized in that the output line of described two-wire system V/I transducer adopts 2 twisted-pair feeders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520529827.1U CN204807191U (en) | 2015-07-21 | 2015-07-21 | Vibration of two -wire system casing becomes send table |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520529827.1U CN204807191U (en) | 2015-07-21 | 2015-07-21 | Vibration of two -wire system casing becomes send table |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204807191U true CN204807191U (en) | 2015-11-25 |
Family
ID=54591998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520529827.1U Expired - Fee Related CN204807191U (en) | 2015-07-21 | 2015-07-21 | Vibration of two -wire system casing becomes send table |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204807191U (en) |
-
2015
- 2015-07-21 CN CN201520529827.1U patent/CN204807191U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201666248U (en) | Natural gas compressor state detection and failure predication system | |
| CN101436046A (en) | Integrated multichannel synchronous oscillation data acquiring and monitoring and analysis diagnostic device | |
| CN106154978A (en) | A kind of dynamic equipment condition monitoring and fault diagnosis security system | |
| CN201607647U (en) | Vibration protecting device | |
| CN201477423U (en) | Intelligent vibration monitoring and protecting apparatus | |
| CN203551240U (en) | Detection and protection device of rotating machinery | |
| CN201413190Y (en) | Vibration monitoring module | |
| CN204807191U (en) | Vibration of two -wire system casing becomes send table | |
| CN202350908U (en) | Intelligent monitor for vibration and temperature | |
| CN208238923U (en) | Intelligent vibration 4-20ma signal transmitting device | |
| CN104330762B (en) | Line fault detection circuit for current transformer | |
| CN111856268A (en) | Motor and generator fault diagnosis system based on harmonic method | |
| CN205015080U (en) | Intelligence vibration monitoring module | |
| CN2629047Y (en) | Computer testing electric machine system | |
| CN201242473Y (en) | Hydraulic set temperature measurement instrument | |
| CN208206290U (en) | Three-wire system casing vibration transmission table | |
| CN202350915U (en) | Vibration transmitter | |
| CN204807099U (en) | Two -wire system position of axle shift variant send table | |
| CN203287098U (en) | Multifunctional vibration transmitter | |
| CN209230776U (en) | A kind of rotating machinery monitoring protection and vibration analysis combination instrument | |
| CN208140144U (en) | Three-wire system axial displacement pick-up table | |
| CN208251228U (en) | Supply equipment on-Line Monitor Device | |
| CN201413334Y (en) | Rotating speed module | |
| CN204807570U (en) | Table is sent in change of two -wire system rotational speed | |
| CN202350728U (en) | Monitor for axial displacement |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151125 |