CN209687841U - A kind of hydraulic safe early warning system - Google Patents
A kind of hydraulic safe early warning system Download PDFInfo
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- CN209687841U CN209687841U CN201920406272.XU CN201920406272U CN209687841U CN 209687841 U CN209687841 U CN 209687841U CN 201920406272 U CN201920406272 U CN 201920406272U CN 209687841 U CN209687841 U CN 209687841U
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Abstract
The utility model provides a kind of hydraulic safe early warning system, belong to electronic circuit technology field, including the relief valve being arranged on fluid pressure line, pressure release sensor is set on the flap of the relief valve, it is characterized in that, the pressure release sensor connects pre-warning signal processing module, the pre-warning signal processing module includes pressure release signal filter circuit, two-way amplification regulating circuit and early warning circuit are sequentially connected composition, the electronic component that the utility model is selected is small and exquisite and economic easy realization, the output signal of pressure release signal filter circuit, which is divided in two-way feeding two-way amplification regulating circuit, to be amplified, transport and placing device AR1, AR2 amplifies the output signal of pressure release signal filter circuit simultaneously, improve signal amplification efficiency, and two input terminals that amplified signal is sent into transport and placing device AR3 are further formed difference-mode input amplification, suppression Signal environment noise processed, effectively improves effectiveness.
Description
Technical field
The utility model belongs to electronic circuit technology field, is specifically related to a kind of hydraulic safe early warning system.
Background technique
The effect of hydraulic system is to increase active force by changing pressure, and a complete hydraulic system is by five part groups
At i.e. dynamical element, executive component, control element, auxiliary element (attachment) and hydraulic oil, the system structure of hydraulic system is by believing
Number control and hydraulic power two parts composition, signal control portion are used to drive control valve events in hydraulic power part, In
In hydraulic system, when equipment or loine pressure are more than regulation safety value, such as executive component commutation and valve closing make to flow
Liquid generate instantaneous pressure peak value because inertia and certain Hydraulic Elements reactions movement be not sensitive enough, peak value can be more than work
Several times of pressure need to carry out pressure release to fluid pressure line at this time, and common method is that relief valve is installed on fluid pressure line, existing
The automatic monitoring warning device of relief valve superpressure is pressure release touching signals to be incuded using pressure release sensor, and be sent to micro process
Device, while pressure release touching signals are recorded, it is finally controlled and is alarmed by microprocessor.But in actual use, due to hydraulic tube
Often there is a phenomenon where hydraulic shock in road, the change dramatically of flow stream velocity causes hydraulic system to cause to vibrate, and generates noise
Equal high frequencies noise jamming, and the signal environment noise that the power supply disturbance of electronic control module generates, all can be to the detection of pressure release sensor
Signal brings very big interference, influences the stability of signal transmitting, results even in wrong early warning, it is automatic to influence relief valve superpressure
Monitoring warning device reliability.
For above situation, this patent provides a kind of hydraulic safe early warning system, including letting out on fluid pressure line is arranged in
Pressure valve, pressure release sensor is arranged on the flap of relief valve, and pressure release sensor connects pre-warning signal processing module, the pre-warning signal
Processing module includes sequentially connected pressure release signal filter circuit, two-way amplification regulating circuit and early warning circuit, improves signal and puts
Big efficiency effectively inhibits signal environment noise.
Utility model content
The utility model provides a kind of hydraulic safe early warning system, includes sequentially connected let out using electronics early warning circuit
It presses signal filter circuit, two-way amplification regulating circuit and early warning circuit to carry out safe early warning to hydraulic safe, improves early warning efficiency.
The utility model provides a kind of hydraulic safe early warning system, including the relief valve being arranged on fluid pressure line, institute
Setting pressure release sensor on the flap of relief valve is stated, the pressure release sensor connects pre-warning signal processing module, the early warning letter
Number processing module includes that pressure release signal filter circuit, two-way amplification regulating circuit and early warning circuit are sequentially connected composition；Wherein, institute
State filter circuit, including capacitor C1, inductance L1, capacitor C2, capacitor C3 and resistance R2, the capacitor C1 one end connection described in let out
The signal output end of pressure sensor, the inductance L1 and capacitor C2 are connected in parallel, and form shunt-resonant circuit, there is the humorous of a fixation
Vibration frequency, be added in shunt-resonant circuit both ends alternating current signal frequencies it is identical as resonance frequency when, present maximum impedance, it is described
Inductance L1 connects the other end of the capacitor C1 with the one end being connected in parallel capacitor C2, and the inductance L1 and capacitor C2 are connected in parallel
The other end connect one end of the capacitor C3 and resistance R2, the other end of the capacitor C3 and resistance R2 are grounded respectively.
The two-way amplification regulating circuit, including transport and placing device AR1 and transport and placing device AR2, the filter circuit are separately connected institute
The non-inverting input terminal 2 of transport and placing device AR1 and transport and placing device AR2 are stated, the inverting input terminal 1 of the transport and placing device AR1 connects the one of resistance R5
The pin 1 at end and rheostat RP1, the output end 3 of the transport and placing device AR1 connects the other end of the resistance R5, and passes through resistance
The non-inverting input terminal 2 of R7 connection transport and placing device AR3, the inverting input terminal 1 of the transport and placing device AR2 connect one end of resistance R6 and described
The pin 2 of rheostat RP1, the output end 3 of the transport and placing device AR2 connects the other end of the resistance R6, and is connected by resistance R8
The inverting input terminal 1 of the transport and placing device AR3 is connect, the non-inverting input terminal 2 of the transport and placing device AR3 is also grounded by resistance R9, described
The pin 3 of rheostat RP1 connects the non-inverting input terminal 2 of transport and placing device AR4, and the output end 3 of the transport and placing device AR4 is connected by capacitor C5
The inverting input terminal 1 of the transport and placing device AR4 is connect, and connects the output end of the filter circuit by diode VD1.
The early warning circuit, including the anode and the diode of diode VD2 and diode VD3, the diode VD2
The cathode of VD3 connects the output end 3 of the transport and placing device AR3 and the cathode of voltage-stabiliser tube DZ2, and the cathode connection of the diode VD2+
The anode of 5V power supply, the plus earth of the diode VD3, the voltage-stabiliser tube DZ2 passes through resistance R10 connection wireless alarming mould
Block passes through resistance R11 connection acousto-optic warning module.
Further, the filter circuit further includes resistance R1, and the resistance R1 and the capacitor C1 are connected in series, mainly
Effect is absorption peak voltage, reduces interference, provides signal-to-noise ratio high signal for next stage.
Further, the two-way amplification regulating circuit further includes that capacitor C4 and voltage-stabiliser tube DZ1 are connected in parallel, the capacitor
C4 connects the pin 3 of the rheostat RP1 with the one end being connected in parallel voltage-stabiliser tube DZ1, and the capacitor C4 and voltage-stabiliser tube DZ1 are in parallel
The other end of connection is grounded, voltage-stabiliser tube DZ1 one steady dc voltage of offer, after shunt capacitance C4, can be played filtering, be disappeared
Except the coupling by power supply.
It further, further include that one end of resistance R3 and resistance R4, the resistance R3 connects the output of the filter circuit
End, the other end of the resistance R3 connect the non-inverting input terminal 2 of the transport and placing device AR1, described in one end connection of the resistance R4
The output end of filter circuit, the other end of the resistance R4 connect the non-inverting input terminal 2 of the transport and placing device AR2.
Further, the wireless alarming module includes triode VT1, and the base stage of the triode VT1 connects resistance
The collector of R10, the triode VT1 are sequentially connected one end of+12V power supply and capacitor C6, another termination of the capacitor C6
The emitter on ground, the triode VT1 connects wireless signal transmitter E1, and wireless signal transmitter model compares currently on the market
It is more, such as DMX512 wireless signal transmitter, WiFi wireless signal transmitter and mobile phone card wireless signal transmitter etc..
Further, the acousto-optic warning module includes bidirectional thyristor Q1, and the control electrode of the bidirectional thyristor Q1 connects
Connecting resistance R11, one end connection+12V power supply of the main electrode of bidirectional thyristor Q1, the main electrode of the bidirectional thyristor Q1 it is another
One end connects one end of resistance R12 and resistance R13, and the other end of the resistance R12 is grounded by indicator light LED1, the resistance
The other end of R13 is grounded by buzzer LS1, the common model of buzzer, including electromagnetism patch type buzzer, because extra small thin
Characteristic, application is more, and several moneys are most commonly used models below: 5002,5003,7525,8503,0927,0945 and 1370.
The utility model provides a kind of hydraulic safe early warning system, including the relief valve being arranged on fluid pressure line, institute
Setting pressure release sensor on the flap of relief valve is stated, the pressure release sensor connects pre-warning signal processing module, the early warning letter
Number processing module includes that pressure release signal filter circuit, two-way amplification regulating circuit and early warning circuit are sequentially connected composition, this is practical
The electronic component of novel selection is small and exquisite and economic easy realization, the output signal of pressure release signal filter circuit divide two-way to be sent into two-way
It being amplified in amplification regulating circuit, transport and placing device AR1, AR2 amplify the output signal of pressure release signal filter circuit simultaneously,
Signal amplification efficiency is improved, and two input terminals that amplified signal is sent into transport and placing device AR3 are further formed difference-mode input
Amplification inhibits signal environment noise, effectively improves effectiveness.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is this
Some embodiments of utility model, for those of ordinary skill in the art, without creative efforts, also
Other drawings may be obtained according to these drawings without any creative labor.
Fig. 1 is the system composition schematic diagram of the utility model.
Fig. 2 is the electrical block diagram of the utility model.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments, based on the implementation in the utility model
Example, those of ordinary skill in the art's every other embodiment obtained without making creative work, all belongs to
In the range of the utility model protection.
As shown in Figs. 1-2, the utility model provides a kind of hydraulic safe early warning system, including is arranged on fluid pressure line
Relief valve, pressure release sensor is set on the flap of the relief valve, the pressure release sensor connects pre-warning signal processing module,
The pre-warning signal processing module includes that pressure release signal filter circuit, two-way amplification regulating circuit and early warning circuit are sequentially connected structure
At.
The output signal of pressure release sensor is sent into pressure release signal filter circuit and is filtered, the filter circuit,
The pressure release sensor is connected including capacitor C1, inductance L1, capacitor C2, capacitor C3 and resistance R2, one end of the capacitor C1
Signal output end, other end connection capacitor C2, one end of inductance L1 and the input terminal of two-way amplification regulating circuit of capacitor C1, institute
It states inductance L1 and capacitor C2 is connected in parallel, form shunt-resonant circuit, have a fixed resonance frequency, be added in shunt-resonant circuit
When the alternating current signal frequencies at both ends are identical as resonance frequency, maximum impedance is presented, the inductance L1 and capacitor C2 are connected in parallel
One end connect the other end of the capacitor C1, the inductance L1 connects the capacitor C3 with the capacitor C2 other end being connected in parallel
And one end of resistance R2, the other end of the capacitor C3 and resistance R2 are grounded respectively, the output signal of pressure release sensor is through capacitor
It is sent into the LC filter formed by capacitor C2, C3, inductance L1 and resistance R2 and is handled after C1 coupling, utilize LC filtering principle
High-frequency Interference of the signal in transmittance process will be reduced, the accuracy of signal is improved.
The output signal of pressure release signal filter circuit, which is divided in two-way feeding two-way amplification regulating circuit, to be amplified, wherein one
Road is input to the non-inverting input terminal 2 of transport and placing device AR1 by resistance R3, and another way is input to the same of transport and placing device AR2 by resistance R4
Phase input terminal 2, transport and placing device AR1, AR2 amplify the output signal of pressure release signal filter circuit simultaneously, improve signal amplification
Efficiency, and two input terminals that amplified signal is sent into transport and placing device AR3 are further formed difference-mode input amplification, inhibit signal
Ambient noise, meanwhile, output signal a part of transport and placing device AR1, AR2 also pass through transport and placing device AR4 and are fed back, and greatly improve
Stability in signal amplification process, the inverting input terminal 1 of transport and placing device AR1 connect one end and the rheostat RP1 of resistance R5
Pin 1, the output end 3 of transport and placing device AR1 connects the other end of resistance R5, and passes through the same mutually defeated of resistance R7 connection transport and placing device AR3
Enter end 2, the inverting input terminal 1 of transport and placing device AR2 connects one end of resistance R6 and the pin 2 of rheostat RP1, and transport and placing device AR2's is defeated
Outlet 3 connects the other end of resistance R6, and passes through the inverting input terminal 1 of resistance R8 connection transport and placing device AR3, and transport and placing device AR3's is same
Phase input terminal 2 is also grounded by resistance R9, and the pin 3 of rheostat RP1 connects the non-inverting input terminal 2 of transport and placing device AR4, capacitor C4
The cathode of one end and voltage-stabiliser tube DZ1, the other end of capacitor C4 and the anode earth of voltage-stabiliser tube DZ1, the output of transport and placing device AR4
End 3 passes through the inverting input terminal 1 of capacitor C5 connection transport and placing device AR4, and passes through diode VD1 connection pressure release signal filter circuit
Output end, wherein the feedback effects of transport and placing device AR4 can be changed in the resistance value of standardsizing rheostat RP1, in actual use for
The pressure release sensor output signal range difference of different model facilitates adjusting, and capacitor C4 and voltage-stabiliser tube DZ1 is in the defeated of transport and placing device AR4
Enter end and play the role of signal-stabilized effect, capacitor C5 plays signal compensation, to effectively guarantee signal in amplification process
In stability.
Early warning circuit includes diode VD2, VD3, and the anode of diode VD2 connect transport and placing device with the cathode of diode VD3
The output end of AR3 and the cathode of voltage-stabiliser tube DZ2, the cathode connection+5V power supply of diode VD2, the plus earth of diode VD3,
The anode of voltage-stabiliser tube DZ2 passes through resistance R11 connection acousto-optic warning module by resistance R10 connection wireless alarming module, due to
For fluid pressure line often there is a phenomenon where hydraulic shock, the change dramatically of flow stream velocity causes hydraulic system to cause to vibrate, and generates
Noise, when detecting abnormal high pressure in order to avoid pressure release sensor, the output signal voltage after the amplification of two-way amplification regulating circuit
It is excessive, late-class circuit is damaged ,+5V power supply, diode VD2, VD3 form clamper voltage regulator circuit for the defeated of transport and placing device AR3
Signal clamper exports in the range of 0-5V out, plays effective protection to the electronic component of late-class circuit, voltage-stabiliser tube DZ2 will be clamped
As control signal driving wireless alarming module and the work of acousto-optic warning module after signal pressure stabilizing behind position.
The early warning circuit, including the anode and the diode of diode VD2 and diode VD3, the diode VD2
The cathode of VD3 connects the output end 3 of the transport and placing device AR3 and the cathode of voltage-stabiliser tube DZ2, and the cathode connection of the diode VD2+
The anode of 5V power supply, the plus earth of the diode VD3, the voltage-stabiliser tube DZ2 passes through resistance R10 connection wireless alarming mould
Block passes through resistance R11 connection acousto-optic warning module.
The filter circuit further includes resistance R1, and the resistance R1 and the capacitor C1 are connected in series, and main function is to inhale
Crest voltage is received, reduces interference, provides signal-to-noise ratio high signal for next stage.
The two-way amplification regulating circuit further includes that capacitor C4 and voltage-stabiliser tube DZ1 are connected in parallel, the capacitor C4 and pressure stabilizing
One end that pipe DZ1 is connected in parallel connects the pin 3 of the rheostat RP1, and the capacitor C4 and voltage-stabiliser tube DZ1 are connected in parallel another
One end is grounded, voltage-stabiliser tube DZ1 one steady dc voltage of offer, after shunt capacitance C4, can play filtering, elimination passes through electricity
The coupling in source.
It further include that one end of resistance R3 and resistance R4, the resistance R3 connects the output end of the filter circuit, the electricity
The other end of resistance R3 connects the non-inverting input terminal 2 of the transport and placing device AR1, and one end of the resistance R4 connects the filter circuit
Output end, the other end of the resistance R4 connect the non-inverting input terminal 2 of the transport and placing device AR2.
The wireless alarming module includes triode VT1, and the base stage of the triode VT1 connects resistance R10, three pole
The collector of pipe VT1 is sequentially connected one end of+12V power supply and capacitor C6, the other end ground connection of the capacitor C6, the triode
The emitter of VT1 connects wireless signal transmitter E1.
The acousto-optic warning module includes bidirectional thyristor Q1, and the control electrode of the bidirectional thyristor Q1 connects resistance R11,
The other end of one end connection+12V power supply of the main electrode of bidirectional thyristor Q1, the main electrode of the bidirectional thyristor Q1 connects electricity
One end of R12 and resistance R13 are hindered, the other end of the resistance R12 is grounded by indicator light LED1, and the resistance R13's is another
End is grounded by buzzer LS1.
When hydraulic line pressure is beyond regulation safe range value, the flap of relief valve is opened to Lift, then
Valve pressure release is automatically turned on, pressure release sensor detects pressure jump at this time, and is converted into electric signal output, and the signal is through pressure release
There is good accuracy and stability after signal filter circuit, the processing of two-way amplification regulating circuit, then through in early warning circuit
It is output to the base stage of triode VT1 and the control electrode of bidirectional thyristor Q1 after clamper pressure stabilizing, makes triode VT1, bidirectional thyristor
Q1 is simultaneously turned on, and wireless signal transmitter E1 is remotely sent on pre-warning signal to terminal Warning Service device in wireless alarming module,
Background work personnel are reminded to make early warning processing；Indicator light LED1, buzzer LS1 obtain electric sending sound in the work of acousto-optic warning module
Visual alarm reminds field service personnel to overhaul fluid pressure line in time.
In conclusion each embodiment of the utility model at least may be implemented it is following the utility model has the advantages that
1. the utility model circuit design is ingenious, the electronic component of selection is small and exquisite and economic easy realization, the filter of pressure release signal
The output signal of wave circuit, which is divided in two-way feeding two-way amplification regulating circuit, to be amplified, and transport and placing device AR1, AR2 are to pressure release signal
The output signal of filter circuit amplifies simultaneously, improves signal amplification efficiency, and amplified signal is sent into transport and placing device AR3
Two input terminals be further formed difference-mode input amplification, effectively inhibit signal environment noise, transport and placing device AR1, AR2 output letter
Number a part also passes through transport and placing device AR4 and is fed back, and greatly improves the stability in signal amplification process.
2. the output signal of pressure release sensor is sent into pressure release signal filter circuit and is filtered, the logical height of capacitor is utilized
Frequency resistance low frequency, inductance lead to low frequency and hinder high frequency, will reduce High-frequency Interference of the signal in transmittance process, improve the accuracy of signal.
3. the resistance value of standardsizing rheostat RP1 can change the feedback effects of transport and placing device AR4, in actual use for
When the pressure release sensor output signal range difference of different model, facilitate adjusting, simple operations.
4. in early warning circuit utilize pressure stabilization function and clamping action, to two-way amplification regulating circuit amplification after output signal into
The output of row clamper, avoids pressure release sensor from damaging when detecting abnormal high pressure to late-class circuit, to the electronics of late-class circuit
Component plays effective protection.
5. early warning circuit uses wireless alarming module and acousto-optic warning module, dual early warning is formed, in wireless alarming module
Wireless signal transmitter E1 is remotely sent on pre-warning signal to terminal Warning Service device, and background work personnel is reminded to make at early warning
Reason；Indicator light LED1, buzzer LS1 obtain electric sending sound and light alarm signal in the work of acousto-optic warning module, remind site examining and repairing people
Member overhauls fluid pressure line in time, keeps early warning effect more efficient reliable.
Finally, it should be noted that the above is only the preferred embodiment of the present invention, it is merely to illustrate practical
Novel technical solution, is not intended to limit the protection scope of the utility model.It is all the spirit and principles of the utility model it
Interior done any modification, equivalent substitution, improvement and etc., are all contained in the protection scope of the utility model.
Claims (6)
1. a kind of hydraulic safe early warning system is set on the flap of the relief valve including the relief valve being arranged on fluid pressure line
Set pressure release sensor, which is characterized in that the pressure release sensor connects pre-warning signal processing module, and the pre-warning signal handles mould
Block includes that pressure release signal filter circuit, two-way amplification regulating circuit and early warning circuit are sequentially connected composition；Wherein,
The filter circuit, including one end connection of capacitor C1, inductance L1, capacitor C2, capacitor C3 and resistance R2, the capacitor C1
The signal output end of the pressure release sensor, the inductance L1 and capacitor C2 are connected in parallel, and the inductance L1 and capacitor C2 are in parallel
One end of connection connects the other end of the capacitor C1, and the inductance L1 connects the electricity with the capacitor C2 other end being connected in parallel
The other end of one end of appearance C3 and resistance R2, the capacitor C3 and resistance R2 are grounded respectively；
The two-way amplification regulating circuit, including transport and placing device AR1 and transport and placing device AR2, the filter circuit are separately connected the fortune
Put the non-inverting input terminal 2 of device AR1 and transport and placing device AR2, the inverting input terminal 1 of the transport and placing device AR1 connect resistance R5 one end and
The pin 1 of rheostat RP1, the output end 3 of the transport and placing device AR1 connects the other end of the resistance R5, and is connected by resistance R7
Connect the non-inverting input terminal 2 of transport and placing device AR3, one end of the connection of the inverting input terminal 1 resistance R6 of the transport and placing device AR2 and the variable resistance
The pin 2 of device RP1, the output end 3 of the transport and placing device AR2 connects the other end of the resistance R6, and passes through resistance R8 connection institute
The inverting input terminal 1 of transport and placing device AR3 is stated, the non-inverting input terminal 2 of the transport and placing device AR3 is also grounded by resistance R9, the variable resistance
The pin 3 of device RP1 connects the non-inverting input terminal 2 of transport and placing device AR4, and the output end 3 of the transport and placing device AR4 passes through capacitor C5 connection institute
The inverting input terminal 1 of transport and placing device AR4 is stated, and connects the output end of the filter circuit by diode VD1；
The early warning circuit, including diode VD2 and diode VD3, the anode of the diode VD2 and the diode VD3
Cathode connect the output end 3 of the transport and placing device AR3 and the cathode of voltage-stabiliser tube DZ2, the cathode connection+5V of the diode VD2
The anode of power supply, the plus earth of the diode VD3, the voltage-stabiliser tube DZ2 passes through resistance R10 connection wireless alarming module,
Pass through resistance R11 connection acousto-optic warning module.
2. a kind of hydraulic safe early warning system according to claim 1, which is characterized in that the filter circuit further includes electricity
R1, the resistance R1 and the capacitor C1 is hindered to be connected in series.
3. a kind of hydraulic safe early warning system according to claim 2, which is characterized in that the two-way amplification regulating circuit
It further include that capacitor C4 and voltage-stabiliser tube DZ1 are connected in parallel, the capacitor C4 connects the change with the one end being connected in parallel voltage-stabiliser tube DZ1
The pin 3 of device RP1 is hindered, the other end ground connection that the capacitor C4 and voltage-stabiliser tube DZ1 are connected in parallel.
4. a kind of hydraulic safe early warning system according to claim 3, which is characterized in that further include resistance R3 and resistance
One end of R4, the resistance R3 connect the output end of the filter circuit, and the other end of the resistance R3 connects the transport and placing device
The non-inverting input terminal 2 of AR1, one end of the resistance R4 connect the output end of the filter circuit, the other end of the resistance R4
Connect the non-inverting input terminal 2 of the transport and placing device AR2.
5. a kind of hydraulic safe early warning system according to claim 4, which is characterized in that the wireless alarming module includes
The base stage of triode VT1, the triode VT1 connect resistance R10, and the collector of the triode VT1 is sequentially connected+12V electricity
The one end in source and capacitor C6, the other end ground connection of the capacitor C6, the emitter connection wireless signal transmitting of the triode VT1
Device E1.
6. a kind of hydraulic safe early warning system according to claim 5, which is characterized in that the acousto-optic warning module includes
The control electrode of bidirectional thyristor Q1, the bidirectional thyristor Q1 connect resistance R11, and one end of the main electrode of bidirectional thyristor Q1 connects
Connect+12V power supply, one end of the other end connection resistance R12 and resistance R13 of the main electrode of the bidirectional thyristor Q1, the electricity
The other end of resistance R12 is grounded by indicator light LED1, and the other end of the resistance R13 is grounded by buzzer LS1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920406272.XU CN209687841U (en) | 2019-03-28 | 2019-03-28 | A kind of hydraulic safe early warning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920406272.XU CN209687841U (en) | 2019-03-28 | 2019-03-28 | A kind of hydraulic safe early warning system |
Publications (1)
| Publication Number | Publication Date |
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| CN209687841U true CN209687841U (en) | 2019-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920406272.XU Expired - Fee Related CN209687841U (en) | 2019-03-28 | 2019-03-28 | A kind of hydraulic safe early warning system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109899342A (en) * | 2019-03-28 | 2019-06-18 | 中国石油大学(华东) | A kind of hydraulic safe early warning system |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109899342A (en) * | 2019-03-28 | 2019-06-18 | 中国石油大学(华东) | A kind of hydraulic safe early warning system |
| CN109899342B (en) * | 2019-03-28 | 2024-04-12 | 中国石油大学(华东) | Hydraulic safety early warning system |
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Granted publication date: 20191126 |