CN204007794U - A kind of generator leakproof fuel cell ultrasonic measurement warning device - Google Patents
A kind of generator leakproof fuel cell ultrasonic measurement warning device Download PDFInfo
- Publication number
- CN204007794U CN204007794U CN201420398488.3U CN201420398488U CN204007794U CN 204007794 U CN204007794 U CN 204007794U CN 201420398488 U CN201420398488 U CN 201420398488U CN 204007794 U CN204007794 U CN 204007794U
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- signal
- ultrasonic
- warning device
- ultrasonic measurement
- measurement warning
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- 238000005259 measurement Methods 0.000 title claims abstract description 19
- 239000000446 fuel Substances 0.000 title claims abstract description 10
- 238000001914 filtration Methods 0.000 claims abstract description 13
- 238000012545 processing Methods 0.000 claims abstract description 12
- 238000001514 detection method Methods 0.000 claims abstract description 9
- 230000002093 peripheral effect Effects 0.000 claims abstract description 6
- 238000002604 ultrasonography Methods 0.000 claims description 13
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 229910052739 hydrogen Inorganic materials 0.000 description 5
- 239000001257 hydrogen Substances 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 230000003321 amplification Effects 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000002679 ablation Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000002592 echocardiography Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Abstract
The utility model provides a kind of generator leakproof fuel cell ultrasonic measurement warning device, adopt ultrasonic sensor principle to complete and measure warning work, it comprises signal processing apparatus and the sender unit being attached thereto respectively, signal receiving device, sender unit comprises the peripheral amplifier of ultrasonic transmitter and connection thereof, signal receiving device comprises the filtering circuit of ultrasonic receiver and connection thereof, and signal processing apparatus comprises singlechip chip and the temperature sensor being attached thereto respectively, digital indicator and signal alarm.By single-chip microcomputer output square-wave signal, utilize outer middle fracture monitoring to receive return signal, and data processing is shown and report to the police.This device adopts non-contact detection method, and measuring accuracy is high, and antijamming capability is strong, and security effectiveness is greatly improved, but compared with tongue tube system, uses cost relatively high, thereby is suitable for some safety coefficient or the relatively high environment of operating accuracy requirement.
Description
Technical field
The utility model relates to measurement, control technology and device field, relates in particular to a kind of generator leakproof fuel cell ultrasonic measurement warning device.
Background technology
Current large turbo-type generator adopts hydrogen-cooled mode mostly, it is oil sealing device that the generator of the hydrogen-cooled mode of all employings just must arrange corresponding gland seal device, its oil supply system by two-way separately independence and the oil circuit that interknits form, one is empty side oil circuit, one is hydrogen side oil circuit.Leakproof fuel cell is the independent oil tank of hydrogen side oil circuit, receive the oil return of hydrogen side seal watt, for hydrogen-side seal oil pump provides oil sources, carry out oily hydrogen separation, in generator sealing oil system, play a part very important, so the measurement liquid level on fuel tank and signalling alarm equipment also seem very important.
Oil tank liquid level is measured warning device, and that what adopt is tongue tube is more, and when normal, tongue tube contact disconnects, and runs into magnetic bodies, junction closure during as liquid level magnetic float, thus realize the collection of signal.Although measure responsive, but because being subject to magnet for a long time, tongue tube affects, self is with magnetic, easily cause signal mistake to send out and control loop misoperation, and in alternating current 220V circuit, easily form contact carbon distribution or ablation phenomen, contact was lost efficacy causes oil level out of control, too high or too low generator sealing bearing bush hydrogen, the empty side pressure fluctuation of all can causing of oil level in fuel tank, even may cause hydrogen gas leakage, causes serious accident.
Ultrasonic ranging method is used widely in various fields, and the utility model that is 200920228190.7 as application number provides a kind of ultrasonic gasoline tank oil level sensor, comprises probe, signal generator, data collector and data processing equipment.Signal generator and the data collector of reversal connection are housed on probe, and signal generator is connected with data processing equipment respectively with data collector.The ultrasound wave transmission/reception that reversal connection is housed on probe, described sensor also comprises wave filter, amplifier, wave detector, CPU, they join successively; Ultrasound wave transmission/reception is as signal generator and data collector, and wave filter, amplifier, wave detector, CPU are as data processing equipment.This sensor price is lower, non-cpntact measurement precision is high, highly able to programme, antijamming capability is strong, and the patent of invention that application number is 201010033387.2 provides a kind of sensing device with applying ultrasonic lever meter to measure liquid level, belong to supersonic technique field, it is characterized in that on prior art basis, between ultrasonic level gage and fluid to be measured surface, sensing device is installed, its structure is that upper end is a maintenance horizontal level, round pie, ganoid reflecting plate, reflecting plate lower surface center is connected perpendicular to the connecting rod of reflecting plate with one, connecting rod middle part kink is in the annulus of two bracket end, the other end of support is fixedly connected on container inner wall, connecting rod lower end and ball float link together, ball float has half to swim on liquid level.While measuring liquid level, the ultrasonic reflections that ultrasonic level gage is sent is at the upper surface of reflecting plate, can measure the height of reflecting plate upper surface to liquid bottom, this height value is deducted to the radius value of the thickness of reflecting plate and the length of connecting rod and ball float, can obtain liquid surface liquid level numerical value accurately, thus completely can by certain method by ultrasonic ranging application of principle among generator leakproof fuel cell.
Utility model content
The purpose of this utility model is to provide a kind of generator leakproof fuel cell ultrasonic measurement warning device, adopts non-contact detection method, and measuring accuracy is high, reports to the police effective, and antijamming capability is strong, and security effectiveness can be greatly improved.
For realizing the technical scheme that the purpose of this utility model adopts be: a kind of generator leakproof fuel cell ultrasonic measurement warning device, comprise signal processing apparatus and the sender unit being attached thereto respectively, signal receiving device, described sender unit comprises the peripheral amplifier of ultrasonic transmitter and connection thereof, described signal receiving device comprises the filtering circuit of ultrasonic receiver and connection thereof, and described signal processing apparatus comprises singlechip chip and the temperature sensor being attached thereto respectively, digital indicator and signal alarm.
Described ultrasonic transmitter is made up of ultrasound transmitting transducer and multiple phase inverter.
Described ultrasonic receiver is made up of ultrasound wave receiving transducer and receiving chip.
Described filtering circuit is the two-stage filtering and amplifying circuit of R-C coupling form.
Described receiving chip is infrared ray detection receiving circuit integrated chip.
Described singlechip chip is MCS-51 series microcontroller able to programme.
When the utility model work, transferring of subroutine be set or be encapsulated to single-chip microcomputer can by internal hardware, realize sampling, comparison, interruption, pulse signal and the sequence of operations such as send, for example, by subroutine control functional pin output signal pulses group, be added to the elementary of amplifier with the form of recommending, push pull mode is low-resistance, is used for ensureing on mouthful line regardless of walking voltage or dividing to walk minimum voltage, after amplifier boosts, signal promotes ultrasound transmitting transducer and launches.Touching after reflecting surface, ultrasound wave receiving transducer is sent to filter amplifier by the barrier reflection wave receiving and carries out amplification filtering, this is high-gain, the low noise amplifier of a R-C coupling form, signal after amplifying is being carried out after detection, send detection of echoes back to single-chip microcomputer receiving end, settling signal gatherer process.
Single-chip microcomputer is converted to general digital signal by the rectified signal receiving on the one hand, be transferred to the outside digital indicator connecting, on the other hand the critical alarming value of digital signal and internal processes storage is carried out to size relatively, if meet or exceed critical alarming value, carry out interruption subroutine, and alerting signal is transferred to external signal alarm, show and warning function thereby realize.Because ultrasonic ranging is by running into the echo that barrier reflects after continuous detection ultrasound wave transmitting, thereby measure the mistiming T that transmits and receives echo, then obtain apart from S=C*T/2, C in formula is ultrasonic velocity, this velocity of wave is affected by transmission medium temperature, so SCM peripheral connects temperature sensor, by the different temperatures value detecting, call the value of wave speed under different temperatures, make to calculate distance more accurate.
The utility model adopts ultrasonic ranging method, and measuring accuracy and security effectiveness are greatly improved, but compared with tongue tube system, uses cost relatively high, thereby is suitable for some safety coefficient or the relatively high environment of operating accuracy requirement.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is transmitting driving circuit figure of the present utility model.
Fig. 3 is wave reception filtering circuit figure of the present utility model.
Fig. 4 is the main program flow chart of single chip computer measurement.
Fig. 5 is the Interruption subroutine flow chart of single chip computer measurement.
Fig. 6 is the external interrupt subroutine flow chart of single chip computer measurement.
Embodiment
As shown in Figures 1 to 6: a kind of generator leakproof fuel cell ultrasonic measurement warning device, comprises signal processing apparatus and the sender unit being attached thereto respectively, signal receiving device.
Sender unit comprises the peripheral amplifier of ultrasonic transmitter and connection thereof, wherein ultrasonic transmitter forms transmitting driving circuit by ultrasound transmitting transducer and multiple phase inverter, export pulse train as drive input signal by the external pin of single-chip microcomputer, this signal is pulsewidth 250 μ s, the square-wave signal of carrier wave 40kHz, an electrode of ultrasonic transducer is delivered on signal one tunnel after one-level reverser, another electrode of ultrasonic transducer is delivered on another road after two-stage reverser, with this two ends of recommending form square-wave signal is added to ultrasonic transducer, can improve hyperacoustic emissive porwer.Output terminal is adopted two reverser parallel connections, in order to improve driving force.Upper resistance R 1, R2 can improve the driving force of reverser output high level on the one hand, can increase on the other hand the damping of ultrasonic transducer, shorten its free oscillation time, phase inverter can be chosen the six anti-phase Schmidt triggers that antijamming capability is strong, as 74LS14.
Signal receiving device comprises the filtering circuit of ultrasonic receiver and connection thereof, wherein, ultrasonic receiver is made up of ultrasound wave receiving transducer and receiving chip, receiving chip is infrared ray detection receiving circuit integrated chip, as integrated chip CX20106A, there is good sensitivity and stronger antijamming capability.By the size of suitable change output capacitor, can also change sensitivity and the antijamming capability of receiving circuit.The signal of receiving chip before being transferred to single-chip microcomputer, circuit after filtering, filtering circuit is the two-stage filtering and amplifying circuit of R-C coupling form, by chip input signal, by introduce electric capacity to cascode level circuit T
1base stage, by T
1after amplification, be reflected in T
1on collector, then introduce electric capacity to T through subordinate
2, after amplification, be reflected in T
2on collector, finally obtain output signal and export by OUT port.
Signal processing apparatus comprises singlechip chip and the temperature sensor being attached thereto respectively, digital indicator and signal alarm.Singlechip chip is MCS-51 series microcontroller able to programme, adopt the high-precision crystal oscillator of 12MHz, to obtain compared with stabilizing clock frequency, reduce measuring error, can set or encapsulate transferring of subroutine by internal hardware, realize sampling, comparison, interruption, pulse signal and the sequence of operations such as send.In the utility model, the square-wave signal of the required 40kHz of default P port output ultrasonic wave transducer for single-chip microcomputer, utilize the return signal of outer middle fracture monitoring ultrasound wave receiving circuit output, on the one hand the return signal receiving is converted to general digital signal subsequently, be transferred to the outside digital indicator connecting, on the other hand the critical alarming value of digital signal and internal processes storage is carried out to size relatively, if meet or exceed critical alarming value, carry out interruption subroutine, and alerting signal is transferred to external signal alarm, show and warning function thereby realize.
Because ultrasonic ranging is by running into the echo that barrier reflects after continuous detection ultrasound wave transmitting, thereby measure the mistiming T that transmits and receives echo, then obtain apart from S=C*T/2, C in formula is ultrasonic velocity, and this velocity of wave is affected by transmission medium temperature, so SCM peripheral connects temperature sensor, by the different temperatures value detecting, call the value of wave speed under different temperatures, for example, when oily the temperature inside the box is 0 DEG C, it is 323 m/s that counting subroutine can call acoustic velocity; In the time that oily the temperature inside the box is 30 DEG C, it is 349 m/s that counting subroutine can call acoustic velocity, can make like this to calculate distance more accurate.
Claims (6)
1. a generator leakproof fuel cell ultrasonic measurement warning device, it is characterized in that: comprise signal processing apparatus and the sender unit being attached thereto respectively, signal receiving device, described sender unit comprises the peripheral amplifier of ultrasonic transmitter and connection thereof, described signal receiving device comprises the filtering circuit of ultrasonic receiver and connection thereof, and described signal processing apparatus comprises singlechip chip and the temperature sensor being attached thereto respectively, digital indicator and signal alarm.
2. ultrasonic measurement warning device as claimed in claim 1, is characterized in that: described ultrasonic receiver is made up of ultrasound wave receiving transducer and receiving chip.
3. ultrasonic measurement warning device as claimed in claim 1, is characterized in that: described ultrasonic transmitter is made up of ultrasound transmitting transducer and multiple phase inverter.
4. ultrasonic measurement warning device as claimed in claim 1, is characterized in that: described filtering circuit is the two-stage filtering and amplifying circuit of R-C coupling form.
5. ultrasonic measurement warning device as claimed in claim 1, is characterized in that: described singlechip chip is MCS-51 series microcontroller able to programme.
6. ultrasonic measurement warning device as claimed in claim 2, is characterized in that: described receiving chip is infrared ray detection receiving circuit integrated chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420398488.3U CN204007794U (en) | 2014-07-18 | 2014-07-18 | A kind of generator leakproof fuel cell ultrasonic measurement warning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420398488.3U CN204007794U (en) | 2014-07-18 | 2014-07-18 | A kind of generator leakproof fuel cell ultrasonic measurement warning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204007794U true CN204007794U (en) | 2014-12-10 |
Family
ID=52047776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420398488.3U Expired - Fee Related CN204007794U (en) | 2014-07-18 | 2014-07-18 | A kind of generator leakproof fuel cell ultrasonic measurement warning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204007794U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017084796A1 (en) * | 2015-11-16 | 2017-05-26 | Robert Bosch Gmbh | Monitoring method and monitoring system for fuel gas |
-
2014
- 2014-07-18 CN CN201420398488.3U patent/CN204007794U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017084796A1 (en) * | 2015-11-16 | 2017-05-26 | Robert Bosch Gmbh | Monitoring method and monitoring system for fuel gas |
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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 |
Granted publication date: 20141210 Termination date: 20150718 |
|
| EXPY | Termination of patent right or utility model |