CN205225938U - Hydraulic system's alarm - Google Patents
Hydraulic system's alarm Download PDFInfo
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- CN205225938U CN205225938U CN201521020690.3U CN201521020690U CN205225938U CN 205225938 U CN205225938 U CN 205225938U CN 201521020690 U CN201521020690 U CN 201521020690U CN 205225938 U CN205225938 U CN 205225938U
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- operational amplifier
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- emitting diode
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Abstract
The utility model discloses a hydraulic system's alarm, including first resistance, demodulator, second resistance, the 2nd comparison circuit, a comparison circuit, an emitting diode, a CD4082BE chip, third resistance, the 2nd CD4082BE chip, the 2nd emitting diode, fourth resistance, 12V power, the 3rd emitting diode, the 5th resistance, 555 chips, fourth emitting diode, the 2nd CD4082BE chip and first switch. The utility model discloses realization that can be accurate is to the control of hydraulic system operating condition, the erroneous judgement phenomenon that simultaneously can effectual solution appears because the start -up course intermediate -current is great.
Description
Technical field
The utility model relates to a kind of alarm, is specifically related to a kind of alarm of hydraulic system.
Background technique
Hydraulic system generally adopts threephase asynchronous machine to drive, in operation, its electric current changes with oil pump load direct ratio, therefore in electric control cubicle, generally motor current collecting device-current transformer is all equipped with, the trend of curent change in motor operation course can be detected at any time by it, but the current signal that current sensor detects is generally am signals, accurately can not judge the operating conditions of hydraulic system, simultaneously in testing process because electric current in motor start-up procedure is larger, therefore often there is the phenomenon of erroneous judgement system conditions, but there is no the device and method that effectively can solve this problem in prior art.
Model utility content
The purpose of this utility model is the shortcoming overcoming above-mentioned prior art, provide a kind of alarm of hydraulic system, this alarm can realize the monitoring to hydraulic system operating conditions accurately, effectively can solve the misjudgment phenomenon occurred because electric current in start-up course is comparatively large simultaneously.
For achieving the above object, the alarm of hydraulic system described in the utility model comprises the first resistance, demodulator, the second resistance, the second comparison circuit, the first comparison circuit, the first light emitting diode, a CD4082BE chip, the 3rd resistance, the 2nd CD4082BE chip, the second light emitting diode, the 4th resistance, 12V power supply, the 3rd light emitting diode, the 5th resistance, 555 chips, the 4th light emitting diode, the 2nd CD4082BE chip, the first switch and the current transformer for detecting motor stator side electric current;
The output terminal of current transformer is connected with the input end of demodulator, the output terminal of demodulator is connected through the input end of the first resistance with the first comparison circuit, the output terminal of demodulator is connected through the input end of the second resistance with the second comparison circuit, the output terminal of the first comparison circuit is connected with the input end of the negative pole of the first light emitting diode and a CD4082BE chip, the positive pole of the first light emitting diode is connected through the output terminal of the 3rd resistance with the 2nd CD4082BE chip, the output terminal of the second comparison circuit is connected with the input end of the negative electrode of the second light emitting diode and a CD4082BE chip, the anode of the second light emitting diode is connected with 12V power supply through the 4th resistance, the output terminal of the one CD4082BE chip is connected with 12V power supply through the 3rd light emitting diode and the 5th resistance,
The output terminal of 555 chips is connected with an input end of the positive pole of the 4th light emitting diode and the 2nd CD4082BE chip, another input end of 2nd CD4082BE chip is connected with 12V power supply, and the negative pole of the 4th light emitting diode is connected with 12V power supply through the first switch.
The output terminal of described demodulator is connected with the first resistance and the second resistance through eliminator, rectification circuit and amplification circuit successively.
Described demodulator comprises the first diode, second switch, the 6th resistance, the 7th resistance, the 8th resistance and the first electric capacity;
One end ground connection of described current transformer, the other end of current transformer is connected with the positive pole of the first diode, the negative pole of the first diode is connected with one end of second switch, one end of the 6th resistance and one end of the first electric capacity, the other end of the first electric capacity is connected with one end of one end of the 7th resistance and the 8th resistance, the equal ground connection of the other end of the other end of second switch, the other end of the 6th resistance and the 7th resistance, the other end of the 8th resistance is connected with eliminator.
Described eliminator comprises the first operational amplifier, the 9th resistance, the tenth resistance, the 11 resistance, first have polar capacitor, second to have polar capacitor and the 3rd to have polar capacitor;
Second positive pole having a polar capacitor, 3rd has one end of the positive pole of polar capacitor and the 9th resistance to be all connected with the 8th resistance, the other end and first of the 9th resistance has the in-phase input end of the positive pole of polar capacitor and the first operational amplifier to be connected, the first equal ground connection in one end having the negative pole of polar capacitor and the tenth resistance, the other end of the tenth resistance is connected with one end of the inverting input of the first operational amplifier and the 11 resistance, the output terminal of the first operational amplifier and second has the negative pole of polar capacitor, 3rd negative pole having a polar capacitor, the other end of the 11 resistance and the input end of rectification circuit are connected.
Described rectification circuit comprises the second operational amplifier, the 3rd operational amplifier, the 12 resistance, the 13 resistance, the 14 resistance, the 15 resistance and the second diode;
The output terminal of described first operational amplifier is connected with the inverting input of the second operational amplifier and one end of the 15 resistance through the 12 resistance, the output terminal of the first operational amplifier is connected through the inverting input of the 13 resistance with the 3rd operational amplifier, the in-phase input end of the second operational amplifier is connected with the inverting input of the 3rd operational amplifier and the negative pole of the second diode, the in-phase input end of the 3rd operational amplifier is through the 14 resistance eutral grounding, the positive pole of the second diode is connected with the output terminal of the 3rd operational amplifier, the output terminal of the second operational amplifier is connected with the other end of the input end of amplification circuit and the 15 resistance.
Described amplification circuit comprises the 16 resistance, the 17 resistance, the 4th has polar capacitor and four-operational amplifier;
The output terminal of the second operational amplifier has the positive pole of polar capacitor to be connected through the 17 resistance with the in-phase input end and the 4th of four-operational amplifier, 4th minus earth having a polar capacitor, the inverting input of four-operational amplifier is connected with one end of the 16 resistance and one end of the 18 resistance, the other end ground connection of the 16 resistance, the output terminal of four-operational amplifier is connected with the other end of the first resistance, the second resistance and the 18 resistance.
Described first comparison circuit comprises the 5th operational amplifier, the 19 resistance and the first slide rheostat;
First resistance is connected with the inverting input of the 5th operational amplifier, one end ground connection of the first slide rheostat, the other end of the first slide rheostat is connected with 12V power supply, the free end of the first slide rheostat is connected through the in-phase input end of the 19 resistance with the 5th operational amplifier, and the output terminal of the 5th operational amplifier is connected with the input end of the negative pole of the first light emitting diode and a CD4082BE chip.
Described second comparison circuit comprises the 6th operational amplifier, the 20 resistance and the second slide rheostat;
Second resistance is connected with the in-phase input end of the 6th operational amplifier, one end ground connection of the second slide rheostat, the other end of the second slide rheostat is connected with 12V power supply, the free end of the second slide rheostat is connected through the inverting input of the 20 resistance with the 6th operational amplifier, and the output terminal of the 6th operational amplifier is connected with the input end of a CD4082BE chip and the negative pole of the second light emitting diode.
The output terminal of 555 chips is connected with 12V power supply through the 22 resistance, the 4th light emitting diode, the first switch and the 11 resistance successively.
The utility model has following beneficial effect:
The alarm of hydraulic system described in the utility model operationally, the current information of motor stator is detected by current transformer, described current information is again through the first comparison circuit, second comparison circuit and a CD4082BE chip carry out logical operation, when the current information after amplifying is in preset range, 3rd light emitting diode brightens, then the slight overload operation of hydraulic system is described, when the current information after amplifying is less than this preset range, second light emitting diode brightens, then illustrate that hydraulic system is normally run, when the first light emitting diode brightens, then the serious overload operation of hydraulic system is described, thus the monitoring realized hydraulic system operating conditions, simultaneously in start-up course, 555 chips start timing, when in Preset Time, 555 chips export as low level, described low level and 12V power supply make the first light emitting diode not work after the 2nd CD4082BE chip computing, thus avoid in start-up course, the erroneous judgement that motor stator side inrush current is excessive and occur, structure is simple, flexible operation, practicability is extremely strong.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
With reference to figure 1, the alarm of hydraulic system described in the utility model comprises the first resistance R1, demodulator, the second resistance R2, the second comparison circuit, the first comparison circuit, the first light emitting diode W1, a CD4082BE chip E1, the 3rd resistance R3, the 2nd CD4082BE chip E2, the second light emitting diode W2, the 4th resistance R4,12V power supply, the 3rd light emitting diode W3, the 5th resistance R5,555 chips, the 4th light emitting diode W4, the 2nd CD4082BE chip E2, the first K switch 1 and the current transformer B for detecting motor stator side electric current, the output terminal of current transformer B is connected with the input end of demodulator, the output terminal of demodulator is connected with the input end of the first comparison circuit through the first resistance R1, the output terminal of demodulator is connected with the input end of the second comparison circuit through the second resistance R2, the output terminal of the first comparison circuit is connected with the input end of the negative pole of the first light emitting diode W1 and a CD4082BE chip E1, the positive pole of the first light emitting diode W1 is connected with the output terminal of the 2nd CD4082BE chip E2 through the 3rd resistance R3, the output terminal of the second comparison circuit is connected with the input end of the negative electrode of the second light emitting diode W2 and a CD4082BE chip E1, the anode of the second light emitting diode W2 is connected with 12V power supply through the 4th resistance R4, the output terminal of the one CD4082BE chip E1 is connected with 12V power supply through the 3rd light emitting diode W3 and the 5th resistance R5, the output terminal of 555 chips is connected with an input end of the positive pole of the 4th light emitting diode W4 and the 2nd CD4082BE chip E2, another input end of 2nd CD4082BE chip E2 is connected with 12V power supply, and the negative pole of the 4th light emitting diode W4 is connected with 12V power supply through the first K switch 1.
It should be noted that, the output terminal of described demodulator is connected with the first resistance R1 and the second resistance R2 through eliminator, rectification circuit and amplification circuit successively.
Described demodulator comprises the first diode D1, second switch K2, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8 and the first electric capacity C1; One end ground connection of described current transformer B, the other end of current transformer B is connected with the positive pole of the first diode D1, the negative pole of the first diode D1 is connected with one end of one end of second switch K2, the 6th resistance R6 and one end of the first electric capacity C1, the other end of the first electric capacity C1 is connected with one end of one end of the 7th resistance R7 and the 8th resistance R8, the equal ground connection of the other end of the other end of second switch K2, the other end of the 6th resistance R6 and the 7th resistance R7, the other end of the 8th resistance R8 is connected with eliminator.
Described eliminator comprises the first operational amplifier Q1, the 9th resistance R9, the tenth resistance R10, the 11 resistance R11, first have polar capacitor C2, second to have polar capacitor C3 and the 3rd to have polar capacitor C4, second positive pole having a polar capacitor C3, 3rd has one end of the positive pole of polar capacitor C4 and the 9th resistance R9 to be all connected with the 8th resistance R8, the other end and first of the 9th resistance R9 has the in-phase input end of the positive pole of polar capacitor C2 and the first operational amplifier Q1 to be connected, the first equal ground connection in one end having the negative pole of polar capacitor C2 and a tenth resistance R10, the other end of the tenth resistance R10 is connected with the inverting input of the first operational amplifier Q1 and one end of the 11 resistance R11, the output terminal of the first operational amplifier Q1 and second has the negative pole of polar capacitor C3, 3rd negative pole having a polar capacitor C4, the other end of the 11 resistance R11 and the input end of rectification circuit are connected.
Described rectification circuit comprises the second operational amplifier Q2, the 3rd operational amplifier Q3, the 12 resistance R12, the 13 resistance R13, the 14 resistance R14, the 15 resistance R15 and the second diode D2, the output terminal of described first operational amplifier Q1 is connected with the inverting input of the second operational amplifier Q2 and one end of the 15 resistance R15 through the 12 resistance R12, the output terminal of the first operational amplifier Q1 is connected with the inverting input of the 3rd operational amplifier Q3 through the 13 resistance R13, the in-phase input end of the second operational amplifier Q2 is connected with the negative pole of the inverting input of the 3rd operational amplifier Q3 and the second diode D2, the in-phase input end of the 3rd operational amplifier Q3 is through the 14 resistance R14 ground connection, the positive pole of the second diode D2 is connected with the output terminal of the 3rd operational amplifier Q3, the output terminal of the second operational amplifier Q2 is connected with the other end of the input end of amplification circuit and the 15 resistance R15.
Described amplification circuit comprises the 16 resistance R16, the 17 resistance R17, the 4th has polar capacitor C5 and four-operational amplifier Q4; The output terminal of the second operational amplifier Q2 has the positive pole of polar capacitor C5 to be connected through the 17 resistance R17 with the in-phase input end and the 4th of four-operational amplifier Q4,4th minus earth having a polar capacitor C5, the inverting input of four-operational amplifier Q4 is connected with one end of the 16 resistance R16 and one end of the 18 resistance R18, the other end ground connection of the 16 resistance R16, the output terminal of four-operational amplifier Q4 is connected with the other end of the first resistance R1, the second resistance R2 and the 18 resistance R18.
Described first comparison circuit comprises the 5th operational amplifier Q5, the 19 resistance R19 and the first slide rheostat R22; First resistance R1 is connected with the inverting input of the 5th operational amplifier Q5, one end ground connection of the first slide rheostat R22, the other end of the first slide rheostat R22 is connected with 12V power supply, the free end of the first slide rheostat R22 is connected with the in-phase input end of the 5th operational amplifier Q5 through the 19 resistance R19, and the output terminal of the 5th operational amplifier Q5 is connected with the input end of the negative pole of the first light emitting diode W1 and a CD4082BE chip E1.
Described second comparison circuit comprises the 6th operational amplifier Q6, the 20 resistance R20 and the second slide rheostat R23, second resistance R2 is connected with the in-phase input end of the 6th operational amplifier Q6, one end ground connection of the second slide rheostat R23, the other end of the second slide rheostat R23 is connected with 12V power supply, the free end of the second slide rheostat R23 is connected with the inverting input of the 6th operational amplifier Q6 through the 20 resistance R20, the output terminal of the 6th operational amplifier Q6 is connected with the input end of a CD4082BE chip E1 and the negative pole of the second light emitting diode W2, the output terminal of 555 chips is successively through the 22 resistance R24, 4th light emitting diode W4, first K switch the 1 and the 11 resistance R21 is connected with 12V power supply.
Specific works process of the present utility model is:
Current transformer B detects the current signal of motor stator in real time, described current signal amplifies through demodulator demodulation, eliminator filtering and amplification circuit successively, current signal after amplification enters into the first comparison circuit and the second comparison circuit, current signal after amplifying is less than the first comparison circuit, whether the current signal after the first comparison circuit judges described amplification is less than or equal to is preset the highest threshold values, when the current signal after amplifying be more than or equal to preset the highest threshold values time, then the first light emitting diode W1 works, then the serious overload operation of hydraulic system is described, second comparison circuit judges whether the current signal after amplifying is less than default minimum threshold values simultaneously, when the current signal after amplifying is less than default minimum threshold values, then the second light emitting diode W2 works, then illustrate that hydraulic system is normally run, when the current signal after amplifying is greater than default minimum threshold values and is less than default maximum threshold values, then the 3rd light emitting diode W3 works, the slight overload operation of hydraulic system is described, when practical operation, described default maximum threshold values can be regulated by the first slide rheostat R22, described default minimum threshold values is regulated by the second slide rheostat R23, structure is simple, flexibility is higher, when starting, 555 chips start timing, in Preset Time, 555 chips export as low level, now the 5th LED operation, described low level and 12V power supply make the first light emitting diode W1 not work after the 2nd CD4082BE chip E2 computing, after exceeding Preset Time, 555 chips export as high level, now the 4th light emitting diode is closed, described high level and 12V power supply make the positive pole of the first light emitting diode W1 connect high level after the 2nd CD4082BE chip E2 computing, thus the first light emitting diode W1 is normally used.
Claims (9)
1. the alarm of a hydraulic system, it is characterized in that, comprise the first resistance (R1), demodulator, second resistance (R2), second comparison circuit, first comparison circuit, first light emitting diode (W1), one CD4082BE chip (E1), 3rd resistance (R3), 2nd CD4082BE chip (E2), second light emitting diode (W2), 4th resistance (R4), 12V power supply, 3rd light emitting diode (W3), 5th resistance (R5), 555 chips, 4th light emitting diode (W4), 2nd CD4082BE chip (E2), first switch (K1), and the current transformer (B) for detecting motor stator side electric current,
The output terminal of current transformer (B) is connected with the input end of demodulator, the output terminal of demodulator is connected with the input end of the first comparison circuit through the first resistance (R1), the output terminal of demodulator is connected with the input end of the second comparison circuit through the second resistance (R2), the output terminal of the first comparison circuit is connected with the input end of the negative pole of the first light emitting diode (W1) and a CD4082BE chip (E1), the positive pole of the first light emitting diode (W1) is connected through the output terminal of the 3rd resistance (R3) with the 2nd CD4082BE chip (E2), the output terminal of the second comparison circuit is connected with the input end of the negative electrode of the second light emitting diode (W2) and a CD4082BE chip (E1), the anode of the second light emitting diode (W2) is connected with 12V power supply through the 4th resistance (R4), the output terminal of the one CD4082BE chip (E1) is connected with 12V power supply through the 3rd light emitting diode (W3) and the 5th resistance (R5),
The output terminal of 555 chips is connected with an input end of the positive pole of the 4th light emitting diode (W4) and the 2nd CD4082BE chip (E2), another input end of 2nd CD4082BE chip (E2) is connected with 12V power supply, and the negative pole of the 4th light emitting diode (W4) is connected with 12V power supply through the first switch (K1).
2. the alarm of hydraulic system according to claim 1, is characterized in that, the output terminal of described demodulator is connected with the first resistance (R1) and the second resistance (R2) through eliminator, rectification circuit and amplification circuit successively.
3. the alarm of hydraulic system according to claim 2, it is characterized in that, described demodulator comprises the first diode (D1), second switch (K2), the 6th resistance (R6), the 7th resistance (R7), the 8th resistance (R8) and the first electric capacity (C1);
One end ground connection of described current transformer (B), the other end of current transformer (B) is connected with the positive pole of the first diode (D1), the negative pole of the first diode (D1) and one end of second switch (K2), one end of 6th resistance (R6) and one end of the first electric capacity (C1) are connected, the other end of the first electric capacity (C1) is connected with one end of one end of the 7th resistance (R7) and the 8th resistance (R8), the other end of second switch (K2), the other end of the 6th resistance (R6) and the equal ground connection of the other end of the 7th resistance (R7), the other end of the 8th resistance (R8) is connected with eliminator.
4. the alarm of hydraulic system according to claim 3, it is characterized in that, described eliminator comprises the first operational amplifier (Q1), the 9th resistance (R9), the tenth resistance (R10), the 11 resistance (R11), first has polar capacitor (C2), second to have polar capacitor (C3) and the 3rd to have polar capacitor (C4);
Second positive pole having polar capacitor (C3), 3rd has one end of the positive pole of polar capacitor (C4) and the 9th resistance (R9) to be all connected with the 8th resistance (R8), the other end and first of the 9th resistance (R9) has the in-phase input end of the positive pole of polar capacitor (C2) and the first operational amplifier (Q1) to be connected, first has the negative pole of polar capacitor (C2) and the equal ground connection in one end of the tenth resistance (R10), the other end of the tenth resistance (R10) is connected with one end of the inverting input of the first operational amplifier (Q1) and the 11 resistance (R11), the output terminal of the first operational amplifier (Q1) and second has the negative pole of polar capacitor (C3), 3rd negative pole having polar capacitor (C4), the other end of the 11 resistance (R11) and the input end of rectification circuit are connected.
5. the alarm of hydraulic system according to claim 4, it is characterized in that, described rectification circuit comprises the second operational amplifier (Q2), the 3rd operational amplifier (Q3), the 12 resistance (R12), the 13 resistance (R13), the 14 resistance (R14), the 15 resistance (R15) and the second diode (D2);
The output terminal of described first operational amplifier (Q1) is connected with the inverting input of the second operational amplifier (Q2) and one end of the 15 resistance (R15) through the 12 resistance (R12), the output terminal of the first operational amplifier (Q1) is connected through the inverting input of the 13 resistance (R13) with the 3rd operational amplifier (Q3), the in-phase input end of the second operational amplifier (Q2) is connected with the inverting input of the 3rd operational amplifier (Q3) and the negative pole of the second diode (D2), the in-phase input end of the 3rd operational amplifier (Q3) is through the 14 resistance (R14) ground connection, the positive pole of the second diode (D2) is connected with the output terminal of the 3rd operational amplifier (Q3), the output terminal of the second operational amplifier (Q2) is connected with the other end of the input end of amplification circuit and the 15 resistance (R15).
6. the alarm of hydraulic system according to claim 5, it is characterized in that, described amplification circuit comprises the 16 resistance (R16), the 17 resistance (R17), the 4th has polar capacitor (C5) and four-operational amplifier (Q4);
The output terminal of the second operational amplifier (Q2) has the positive pole of polar capacitor (C5) to be connected through the 17 resistance (R17) with the in-phase input end and the 4th of four-operational amplifier (Q4), 4th minus earth having polar capacitor (C5), the inverting input of four-operational amplifier (Q4) is connected with one end of the 16 resistance (R16) and one end of the 18 resistance (R18), the other end ground connection of the 16 resistance (R16), the output terminal of four-operational amplifier (Q4) and the first resistance (R1), the other end of the second resistance (R2) and the 18 resistance (R18) is connected.
7. the alarm of hydraulic system according to claim 6, is characterized in that, described first comparison circuit comprises the 5th operational amplifier (Q5), the 19 resistance (R19) and the first slide rheostat (R22);
First resistance (R1) is connected with the inverting input of the 5th operational amplifier (Q5), one end ground connection of the first slide rheostat (R22), the other end of the first slide rheostat (R22) is connected with 12V power supply, the free end of the first slide rheostat (R22) is connected through the in-phase input end of the 19 resistance (R19) with the 5th operational amplifier (Q5), and the output terminal of the 5th operational amplifier (Q5) is connected with the input end of the negative pole of the first light emitting diode (W1) and a CD4082BE chip (E1).
8. the alarm of hydraulic system according to claim 7, is characterized in that, described second comparison circuit comprises the 6th operational amplifier (Q6), the 20 resistance (R20) and the second slide rheostat (R23);
Second resistance (R2) is connected with the in-phase input end of the 6th operational amplifier (Q6), one end ground connection of the second slide rheostat (R23), the other end of the second slide rheostat (R23) is connected with 12V power supply, the free end of the second slide rheostat (R23) is connected through the inverting input of the 20 resistance (R20) with the 6th operational amplifier (Q6), and the output terminal of the 6th operational amplifier (Q6) is connected with the input end of a CD4082BE chip (E1) and the negative pole of the second light emitting diode (W2).
9. the alarm of hydraulic system according to claim 8, it is characterized in that, the output terminal of 555 chips is connected with 12V power supply through the 22 resistance (R24), the 4th light emitting diode (W4), the first switch (K1) and the 11 resistance (R21) successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521020690.3U CN205225938U (en) | 2015-12-09 | 2015-12-09 | Hydraulic system's alarm |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521020690.3U CN205225938U (en) | 2015-12-09 | 2015-12-09 | Hydraulic system's alarm |
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| CN205225938U true CN205225938U (en) | 2016-05-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422549A (en) * | 2015-12-09 | 2016-03-23 | 西安建筑科技大学 | Alarm of hydraulic system |
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2015
- 2015-12-09 CN CN201521020690.3U patent/CN205225938U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105422549A (en) * | 2015-12-09 | 2016-03-23 | 西安建筑科技大学 | Alarm of hydraulic system |
| CN105422549B (en) * | 2015-12-09 | 2017-05-24 | 西安建筑科技大学 | Alarm of hydraulic system |
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