CN207339817U - A kind of key phase preamplifier - Google Patents
A kind of key phase preamplifier Download PDFInfo
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- CN207339817U CN207339817U CN201721501803.0U CN201721501803U CN207339817U CN 207339817 U CN207339817 U CN 207339817U CN 201721501803 U CN201721501803 U CN 201721501803U CN 207339817 U CN207339817 U CN 207339817U
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Abstract
The utility model provides a kind of key phase preamplifier, including sequentially connected signal conditioning circuit, hysteresis comparison circuit, shaping circuit, output driving circuit and power circuit, the power supply output of power circuit is connected respectively to signal conditioning circuit, hysteresis comparison circuit, shaping circuit, the power input of output driving circuit；Foregoing hysteresis comparison circuit includes two comparators, and two comparator outputs are respectively set as high-low threshold value trigger voltage；The output of high-low threshold value trigger voltage connects logic gate and trigger, square-wave signal of the trigger output with hysteretic characteristics respectively.Power circuit provides working power and datum for foregoing each functional circuit connection.
Description
Technical field
Measuring instrumentss field is the utility model is related to, in particular to a kind of key phase preamplifier.
Background technology
Key is mutually measured by setting a groove or convex key on measured axis, claims key mutually to mark.When this groove or convex key
When going to sensor mounting location, sensor can produce a voltage signal, and axis every revolution, will produce a signal, production
The relative position of axis in the cycle is indicated at the time of raw.Usual sensor output signal (is generally for class sinusoidal ac signal
Sense the electromagnetic signal produced), sensor signal need to be converted into having by preamplifier for accurately definite phase precipitous
The pulse signal of upper lower edge.Key phase preamplifier has a wide range of applications in mechanical protection systems, by pulse count,
The rotating speed of axis can be measured；By by pulse compared with the vibration signal of axis, it may be determined that the phase angle of vibration, for shafting frequency
The specificity analysises such as spectrum, amplitude-frequency；Steam turbine can use key signal auxiliary misalignment measurement when mechanical actuation.
Modern control technology requirement makes accurate measurement to the frequency and phase of key phase, the base accurately controlled as numeral
Standard, since the rotating speed of measured axis is big, it should say that the latter's is difficult, existing amplifier is difficult to complete to survey the accurate of phase
Amount.
Utility model content
The utility model aim is to provide a kind of key phase preamplifier, using hydrid integrated circuit and operational amplifier
Deng device by the tach signal that sensor inputs be converted into pulsewidth fixation calibration pulse signal, especially signal conditioning circuit,
Hysteresis comparison circuit, has the advantages that transmission delay is small, Phase Tracking is stable, reliable high, can be rotating speed, misalignment measurement and machinery
Fault diagnosis provides phase reference signal.
To reach above-mentioned purpose, the utility model proposes a kind of key phase preamplifier, including sequentially connected signal tune
Circuit, hysteresis comparison circuit, shaping circuit, output driving circuit and power circuit are managed, the power supply output of power circuit connects respectively
It is connected to signal conditioning circuit, hysteresis comparison circuit, shaping circuit, the power input of output driving circuit；
Foregoing hysteresis comparison circuit includes two comparators, and two comparator outputs are respectively set as high-low threshold value triggering electricity
Press Vth, Vtl；The output of high-low threshold value trigger voltage connects logic gate and trigger respectively, and height activation threshold value is by comparator potentiometer
The bleeder circuit that SW10-11 and resistance R112-115 are formed provides, and circuit touches the comparison of incoming signal level and activation threshold value
Send out square-wave signal of the device output with hysteretic characteristics.
Aforementioned signal modulate circuit uses amplitude limit rectification circuit and filter amplification circuit, and the class that key phase is exported is just
String ripple tach signal is converted into half-wave tach signal, and is converted into being appropriate for comparing by tach signal using filter amplification circuit
Level signal.
Foregoing output driving circuit carries out isolation output using optocoupler and transistor amplifier circuit to output pulse, before increase
Put amplifier carrying load ability.
Aforementioned power source circuit uses voltage reference chip to provide threshold reference potential for foregoing hysteresis comparison circuit.
Aforementioned signal modulate circuit uses the sinusoidal wave tach signal that amplitude limit rectification circuit exports key phase device
It is converted into half-wave tach signal, and using filter amplification circuit is converted into tach signal being appropriate for the level signal compared.
The signals of rotational speed sensor that signal conditioning circuit is used to receive it carries out amplitude limit, rectification, filtering, amplification, compares for hysteresis
Device provides required half-wave tach signal；
Rotating speed square-wave signal is converted into the key signal of pulsewidth fixation using hydrid integrated circuit by foregoing shaping circuit, whole
Shape circuit is used for the square-wave signal pulsewidth for adjusting the output of hysteresis comparison circuit, to generate the key phase pulse signal of pulsewidth fixation；Arteries and veins
Width can modified elements parameter be adjusted.
Further, aforementioned signal modulate circuit carries out spacing and rectification, filtered electrical using diode pair all-wave tach signal
Road uses active filter circuit, eliminates the noise coupled in tach signal, and be amplified.
The beneficial effects of the utility model, input sensor using circuits such as operational amplifier, comparator, logic gates
Tach signal is handled, and generation pulsewidth is fixed, the adjustable key phase reference signal of activation threshold value, need to be passed through for accurately definite phase
Sensor signal is converted into the pulse signal with precipitous upper lower edge by preamplifier.Tthe utility model system Phase Tracking is accurate
Really, transmission delay is small, strong antijamming capability, stable and reliable operation, had a wide range of applications in mechanical protection systems, pass through essence
Really complete the phase of the rotating speed of measurement axis.The utility model is defeated by sensor using devices such as operational amplifier and logic gates
The tach signal entered is converted into the calibration pulse signal of pulsewidth fixation, Phase Tracking is accurate, operation can, available for tachometric survey and
Key phase reference signal as misalignment measurement and mechanical fault diagnosis.
Brief description of the drawings
Fig. 1 is the module diagram of the key phase preamplifier of the utility model preferred embodiment.
Fig. 2 is the circuit diagram that logic control circuit is counted in Fig. 1 embodiments.
Fig. 3 is the circuit diagram of decoding circuit in Fig. 1 embodiments.
Fig. 4 is the circuit diagram of signal conditioning circuit in Fig. 1 embodiments.
Fig. 5 is the circuit diagram of warning circuit in Fig. 1 embodiments.
Fig. 6 is regular and outputting circuit for relay circuit diagram in Fig. 1 embodiments.
Embodiment
In order to know more about the technology contents of the utility model, especially exemplified by specific embodiment and institute's accompanying drawings are coordinated to be described as follows.
As shown in Figure 1, preferred embodiment according to the present utility model, key phase preamplifier include signal conditioning circuit 1,
Hysteresis comparison circuit 2, shaping circuit 3, output driving circuit 4, power circuit 5.As shown in Figure 1, signal conditioning circuit 1 with it is foregoing
Hysteresis comparison circuit 2 connects, and the output that hysteresis compares 2 is connected with shaping circuit 3, output and the output driving electricity of shaping circuit 3
Road 4 connects, and power circuit 5 provides working power for foregoing each functional circuit, and provides activation threshold value ginseng for hysteresis comparison circuit 2
Examine level.
Signal conditioning circuit 1 is used to carry out amplitude limit, rectification, filtering, amplification to signals of rotational speed sensor.As shown in Fig. 2, this
In embodiment, signal conditioning circuit 1 include diode D1, D2, resistance R103, R104, R105-107, capacitance C111, C112 and
Operational amplifier U100, U100B.Wherein：Diode D1, D2 carry out amplitude limit rectification in Fig. 2, and input signal conditioning is turned into half-wave
Fast signal, operational amplifier U100 and resistance capacitance form active power filtering amplifying circuit, have for filtering out high frequency noise and amplifying
Use signal.
Tach signal is converted into square-wave signal by hysteresis loop comparator using comparator and logic gates.Comparator has can
Low activation threshold value is heightened, forms the trigger circuit with hysteretic characteristic, its height activation threshold value is carried out using adjustable voltage division circuit
Set.Tach signal is converted into square-wave signal by hysteresis comparison circuit 2 according to the activation threshold value voltage of setting.As shown in figure 3, this
In embodiment, hysteresis comparison circuit 2 including two comparators U101A, B be respectively set as high-low threshold value trigger voltage Vth, Vtl,
Logic gate (U102B, C, U103A-D) and trigger U104A are met respectively, and height activation threshold value is by potentiometer in comparator circuit
The bleeder circuit that SW10-11 and resistance R112-115 are formed provides, circuit by the comparison of incoming signal level and activation threshold value, by
The bleeder circuit that potentiometer SW10-11 and resistance R112-115 is formed provides, and the functional circuit is by incoming signal level with triggering
The comparison of threshold value, output (generation) have the square-wave signal of hysteretic characteristics.
Refering to what is shown in Fig. 4, shaping circuit includes the passive devices such as hydrid integrated circuit and resistance capacitance, for square wave to be believed
The pulse signal with fixed pulse width number is converted into, pulsewidth can be set by adjusting component parameter.3 fixed pulse width of shaping circuit
Generation circuit includes hydrid integrated circuit U105 and resistance capacitance, for by square-wave signal rotating speed into the pulse with fixed pulse width
Signal, wherein R118 and C107 are used to adjust pulse width.
Refering to what is shown in Fig. 5, output driving circuit includes the elements such as optocoupler, transistor, for isolating output and other functions
Circuit, and increase load driving force.Output driving circuit 4 includes optocoupler OPT1, transistor Q1 and resistance capacitance, wherein optocoupler
OPT1 is physically separated signal is exported with front stage circuits, and the amplifying circuit based on transistor Q1 is used to increase output signal
Driving force.
Refering to what is shown in Fig. 6, power circuit uses isolated power supply module to provide working power for each functional circuit in fore-lying device
With comparator threshold datum.Power circuit 5 includes isolation module power supply POW1, POW2, reference voltage source U1 and resistance electricity
Hold, reference voltage source U1 provides datum for 2 activation threshold value of hysteresis comparison circuit, and modular power source POW1 is signal conditioning circuit
1st, hysteresis comparison circuit 2, shaping circuit 3 provide working power, and modular power source POW2 provides working power for output driving circuit.
As it can be seen that the key phase preamplifier of the present embodiment uses the circuits such as operational amplifier, comparator, logic gate to sensing
The tach signal of device input is handled, and generation pulsewidth is fixed, the adjustable key phase reference signal of activation threshold value, system phase tracking
Accurately, transmission delay is small, strong antijamming capability, stable and reliable operation, suitable for rotating speed, misalignment measurement and mechanical fault diagnosis.
In conclusion the utility model feature is as follows：
1st, using the hysteresis loop comparator with adjustable height activation threshold value level, turn suitable for connection signal amplitude is different
Fast sensor (such as magnetoelectric tachometric transducer, current vortex sensor), and firing level can be adjusted according to background scene noise level
Value, can effectively improve preamplifier antijamming capability.
2nd, designed using devices at full hardware, Phase Tracking is accurate, transmission delay is small, stable and reliable operation.
3rd, key mutually exports the calibration pulse signal fixed for pulsewidth, is conducive to rear class processing instrument and accurately determines to refer to phase
Position.
4th, exported using isolation drive, there is stronger carrying load ability and protect rear class processing system.
Although the utility model has been disclosed with preferred embodiment as above, so it is not limited to the utility model.This reality
It is without departing from the spirit and scope of the utility model, each when that can make with new those of ordinary skill in the art
Kind changes and retouches.Therefore, the scope of protection of the utility model is when subject to those as defined in claim.
Claims (4)
- A kind of 1. key phase preamplifier, it is characterised in that including sequentially connected signal conditioning circuit, hysteresis comparison circuit, Shaping circuit, output driving circuit and power circuit, the power supply output of power circuit are connected respectively to signal conditioning circuit, hysteresis Comparison circuit, shaping circuit, the power input of output driving circuit；Foregoing hysteresis comparison circuit includes two comparators, and two comparator outputs are respectively set as high-low threshold value trigger voltage； The output of high-low threshold value trigger voltage connects logic gate and trigger, square-wave signal of the trigger output with hysteretic characteristics respectively.
- 2. key phase preamplifier according to claim 1, it is characterised in that aforementioned signal modulate circuit is whole using amplitude limit Current circuit and filter amplification circuit.
- 3. key phase preamplifier according to claim 1, it is characterised in that foregoing output driving circuit using optocoupler and Transistor amplifier circuit carries out isolation output to output pulse.
- 4. key phase preamplifier according to claim 1, it is characterised in that aforementioned power source circuit uses voltage reference core Piece provides threshold reference potential for foregoing hysteresis comparison circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721501803.0U CN207339817U (en) | 2017-11-13 | 2017-11-13 | A kind of key phase preamplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721501803.0U CN207339817U (en) | 2017-11-13 | 2017-11-13 | A kind of key phase preamplifier |
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| Publication Number | Publication Date |
|---|---|
| CN207339817U true CN207339817U (en) | 2018-05-08 |
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ID=62427695
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721501803.0U Active CN207339817U (en) | 2017-11-13 | 2017-11-13 | A kind of key phase preamplifier |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111105955A (en) * | 2020-01-06 | 2020-05-05 | 江苏海诺普谩电子科技有限公司 | Air pressure height switch |
| CN114089036A (en) * | 2021-11-09 | 2022-02-25 | 许继集团有限公司 | Key phase pulse intelligent acquisition device and acquisition method thereof |
-
2017
- 2017-11-13 CN CN201721501803.0U patent/CN207339817U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111105955A (en) * | 2020-01-06 | 2020-05-05 | 江苏海诺普谩电子科技有限公司 | Air pressure height switch |
| CN114089036A (en) * | 2021-11-09 | 2022-02-25 | 许继集团有限公司 | Key phase pulse intelligent acquisition device and acquisition method thereof |
| CN114089036B (en) * | 2021-11-09 | 2024-04-16 | 许继集团有限公司 | Key phase pulse intelligent acquisition device and acquisition method thereof |
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