CN108362360A - A kind of fuel-metering device and its metering method - Google Patents
A kind of fuel-metering device and its metering method Download PDFInfo
- Publication number
- CN108362360A CN108362360A CN201810327533.9A CN201810327533A CN108362360A CN 108362360 A CN108362360 A CN 108362360A CN 201810327533 A CN201810327533 A CN 201810327533A CN 108362360 A CN108362360 A CN 108362360A
- Authority
- CN
- China
- Prior art keywords
- connect
- fuel
- integrated circuit
- nand gate
- metering device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000000295 fuel oil Substances 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 9
- 239000003921 oil Substances 0.000 claims description 8
- 238000004458 analytical method Methods 0.000 claims description 5
- 238000004364 calculation method Methods 0.000 claims description 5
- 239000000446 fuel Substances 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000013078 crystal Substances 0.000 claims description 3
- 230000003628 erosive effect Effects 0.000 claims description 3
- 239000010761 intermediate fuel oil Substances 0.000 claims description 3
- 239000004973 liquid crystal related substance Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003760 hair shine Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/10—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of flowmeters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a kind of fuel-metering devices, including tube body and measuring instrument, the both ends of tube body are respectively arranged with oil inlet pipe and flowline, tube body is internally provided with flow sensor, flow sensor is connect with measuring instrument, control module is provided in measuring instrument, control module is connect with flow sensor, control module is connected with accumulator, accumulator is connected with charging module, charging module includes charging circuit, measuring instrument outer surface is provided with display screen, indicator light, loud speaker and button, display screen, indicator light, loud speaker and button are connect with control module, the invention also discloses the metering methods of the fuel-metering device.Solve the problems, such as that the accumulator of fuel-metering device existing in the prior art is unable to automatic charging.
Description
Technical field
The invention belongs to fuel metering technical fields, are related to a kind of fuel-metering device, and the invention further relates to above-mentioned fuel oils
The metering method of metering device.
Background technology
All it is to need external power supply in existing fuel-metering device, thus will appear power input failure, from
And cause device that can not run, reduce the reliability of device；So in the fuel-metering device of part, it is equipped with accumulator, still
Automatic charging can not be carried out for accumulator charging, staff is needed manually to be observed, when not enough power supply, then it is right
It charges, and is greatly lowered the practicability of device in this way.
Invention content
The object of the present invention is to provide a kind of fuel-metering devices, solve fuel-metering device existing in the prior art
Accumulator the problem of being unable to automatic charging.
It is a further object of the present invention to provide the metering methods of above-mentioned fuel-metering device.
The technical solution adopted in the present invention is a kind of fuel-metering device, including tube body and measuring instrument, the two of tube body
End is respectively arranged with oil inlet pipe and flowline, and tube body is internally provided with flow sensor, and flow sensor connects with measuring instrument
It connects, control module is provided in measuring instrument, control module is connect with flow sensor, and control module is connected with accumulator, is stored
Battery is connected with charging module, and charging module includes charging circuit, and measuring instrument outer surface is provided with display screen, indicator light, raises
Sound device and button, display screen, indicator light, loud speaker and button are connect with control module.
The features of the present invention also characterized in that
Charging circuit includes integrated circuit U5, the first end of integrated circuit U5 by adjustable resistance RP1, first resistor R1 and
The series circuit of first capacitance C1 compositions is connect with the second end of integrated circuit U5, and the second end of integrated circuit U5 passes through the first electricity
The series circuit for holding C1 and second resistance R2 compositions is connect with the third end of integrated circuit U5, and the second end of integrated circuit U5 is also divided
Do not connect with one of the first NAND gate U1 input terminal and 3rd resistor R3, another input terminal of the first NAND gate U1 with
The 8th end of integrated circuit U5 connects, and the 5th end, the 6th end and the 7th end of integrated circuit U5 are grounded, and the of integrated circuit U5
Ten ends, the 12nd end, the 13rd end, the 14th end are connect with the anode of accumulator BT1, and the 8th end of integrated circuit U5 passes through
4th resistance R4 connect with the base stage of triode VT1, is connect with the anode of third Light-emitting diode LED 3 by the 4th resistance R4,
The anode of second Light-emitting diode LED 2 is connect by 3rd resistor R3 with the second end of integrated circuit U5, the second light emitting diode
The cathode of LED2 and the cathode of third Light-emitting diode LED 3 are grounded, the tenth one end ground connection of integrated circuit U5, triode VT1
Emitter connect with the moved end of switch S1, in two non-moving ends of switch S1, one of non-moving end passes through the 5th resistance R5
Ground connection, another non-moving end are grounded by the 6th resistance R6, the moon of the collector of triode VT1 and the first Light-emitting diode LED 1
Pole connects, and the anode of the first Light-emitting diode LED 1 is connect with the cathode of accumulator BT1, one end of the outlet side of rectifier bridge BR1
Be grounded by third capacitance C3, the positive of the other end and accumulator BT1 connect, the output end of the first NAND gate U1 with second with it is non-
One of door U2 input terminal connections, another input end grounding of the second NAND gate U2, the output end of the second NAND gate U2
Connect with one of third NAND gate U3 input terminal, another input terminal of third NAND gate U3 by the 8th resistance R8 and
The series circuit of 7th resistance R7 compositions is connect with the input terminal of the output end of third NAND gate U3 and the 4th NAND gate U4 respectively,
The output end of 4th NAND gate U4 is by the series circuit of the second capacitance C2 and the 7th resistance R7 compositions with third NAND gate U3's
Output end connects, and the output end of the 4th NAND gate U4 is connect by crystal oscillator X1 with the anode of accumulator BT1.
The model CD4541 of integrated circuit U5, switch S1 are single-pole double-throw switch (SPDT).
Display screen is liquid crystal display.
The operating voltage of loud speaker is 5V.
The periphery of measuring instrument is coated with erosion resistant coating.
Another technical solution of the present invention is that a kind of metering method of fuel-metering device specifically includes following
Step：
Step 1：Fuel oil enters tube body from oil inlet pipe, is then flowed out from flowline, when flowing in tube body, passes through stream
Quantity sensor acquires the data on flows of fuel oil in real time；
Step 2：The real-time calculation and analysis of fuel flow is carried out by error model of the computing terminal based on flow sensor；
Step 3：The Calculation results of step 2 intermediate fuel oil flow are assessed based on fault alarm model, to real
The keying of existing voice alarm module.
The characteristics of another technical solution of the present invention, also resides in,
In step 2, different flow sensors corresponds to different error models.
In step 3, fault alarm model includes at least fuel oil and calculates the result of analysis and its corresponding fault type data
With audio alert phrase.
The invention has the advantages that
1. a kind of fuel-metering device of the present invention can carry out accumulator periodical charging, be prevented by charging circuit
Accumulator electric-quantity is insufficient, improves the reliability of device；
2. the metering method of fuel-metering device of the present invention, step is simple, and accurate measurement is reliable.
Description of the drawings
Fig. 1 is a kind of structure chart of fuel-metering device of the present invention；
Fig. 2 is a kind of function structure chart of the measuring instrument of fuel-metering device of the present invention；
Fig. 3 is a kind of circuit diagram of the charging circuit of the measuring instrument of fuel-metering device of the present invention.
In figure, 1. tube bodies, 2. oil inlet pipes, 3. flowlines, 4. flow sensors, 5. measuring instruments, 6. display screens, 7. instructions
Lamp, 8. loud speakers, 9. buttons, 10. control modules, 11. accumulators, 12. charging modules, 13. charging circuits.
Specific implementation mode
The following describes the present invention in detail with reference to the accompanying drawings and specific embodiments.
A kind of fuel-metering device of the present invention, structure is as shown in Figure 1, Figure 2 and Figure 3, including tube body 1 and measuring instrument 5, pipe
The both ends of body 1 are respectively arranged with oil inlet pipe 2 and flowline 3, and tube body 1 is internally provided with flow sensor 4, flow sensor 4
It is connect with measuring instrument 5, control module 10 is provided in measuring instrument 5, control module 10 is connect with flow sensor 4, control
Module 10 is connected with accumulator 11, and accumulator 11 is connected with charging module 12, and charging module 12 includes charging circuit 13, gauge
5 outer surface of table is provided with display screen 6, indicator light 7, loud speaker 8 and button 9, display screen 6, indicator light 7, loud speaker 8 and button 9
It is connect with control module 10.
Charging circuit 13 includes integrated circuit U5, and the first end of integrated circuit U5 passes through adjustable resistance RP1, first resistor R1
It is connect with the second end of integrated circuit U5 with the series circuit of the first capacitance C1 compositions, the second end of integrated circuit U5 passes through first
The series circuit of capacitance C1 and second resistance R2 compositions is connect with the third end of integrated circuit U5, and the second end of integrated circuit U5 is also
It is connect respectively with one of the first NAND gate U1 input terminal and 3rd resistor R3, another input terminal of the first NAND gate U1
It is connect with the 8th end of integrated circuit U5, the 5th end, the 6th end and the 7th end of integrated circuit U5 are grounded, integrated circuit U5's
Tenth end, the 12nd end, the 13rd end, the 14th end are connect with the anode of accumulator 11BT1, the 8th end of integrated circuit U5
It is connect with the base stage of triode VT1 by the 4th resistance R4, by the anode of the 4th resistance R4 and third Light-emitting diode LED 3
Connection, the anode of the second Light-emitting diode LED 2 are connect by 3rd resistor R3 with the second end of integrated circuit U5, and second shines
The cathode of diode (LED) 2 and the cathode of third Light-emitting diode LED 3 are grounded, the tenth one end ground connection of integrated circuit U5, and three
The emitter of pole pipe VT1 is connect with the moved end of switch S1, and in two non-moving ends of switch S1, one of non-moving end passes through the 5th
Resistance R5 ground connection, another non-moving end are grounded by the 6th resistance R6, the collector of triode VT1 and the first light emitting diode
The cathode of LED1 connects, and the anode of the first Light-emitting diode LED 1 is connect with the cathode of accumulator BT1, the output of rectifier bridge BR1
One end of side is grounded by third capacitance C3, and the other end is connect with the anode of accumulator 11BT1, the output end of the first NAND gate U1
It is connect with one of the second NAND gate U2 input terminal, another input end grounding of the second NAND gate U2, the second NAND gate
The output end of U2 is connect with one of third NAND gate U3 input terminal, and another input terminal of third NAND gate U3 passes through
The series circuit of eight resistance R8 and the 7th resistance R7 compositions respectively with the output end of third NAND gate U3 and the 4th NAND gate U4
Input terminal connects, and the output end of the 4th NAND gate U4 passes through series circuit and third that the second capacitance C2 and the 7th resistance R7 are formed
The output end of NAND gate U3 connects, and the output end of the 4th NAND gate U4 is connect by crystal oscillator X1 with the anode of accumulator BT1.
The model CD4541 of integrated circuit U5, switch S1 are single-pole double-throw switch (SPDT).
Display screen 6 is liquid crystal display.
The operating voltage of loud speaker 8 is 5V.
The periphery of measuring instrument 5 is coated with erosion resistant coating, plays the role of etch-proof.
A kind of fuel-metering device of the present invention, when use, fuel oil enters from oil inlet pipe 2, then from flowline 3
Outflow, when fuel oil flows in tube body 1, monitors the flow of fuel oil in real time by flow sensor 4, the number of monitoring
According to and device job information real-time display on display screen 6, indicator light 7 indicates the working condition of device in real time, raises
Sound device 8 can carry out voice prompt, and button 9 can manipulate device.
A kind of fuel-metering device of the present invention, charging circuit 13 have the characteristics that automatic charging, constant-current charge, power on
Circuit is started to work afterwards, and internal counter counts oscillator, after counting meter completely, the 8th end of integrated circuit U5
Output level occurs overturning and stops counting.If the tenth termination high level of integrated circuit U5, full rear integrated circuit U5 is counted
The overturning of the 8th end, then count again, such cycle overturn again after meter is full, so as to accumulator BT1 periodically fill
Electricity prevents accumulator BT1 not enough power supplies, improves the reliability of device.
A kind of metering method of fuel-metering device of the present invention, specifically includes following steps：
Step 1：Fuel oil enters tube body 1 from oil inlet pipe 2, is then flowed out from flowline 3, when flowing in tube body 1, leads to
Overcurrent quantity sensor 4 acquires the data on flows of fuel oil in real time；
Step 2：The real-time calculating point of fuel flow is carried out by error model of the computing terminal based on flow sensor 4
Analysis；
Step 3：The Calculation results of step 2 intermediate fuel oil flow are assessed based on fault alarm model, to real
The keying of existing voice alarm module.
In step 2, different flow sensors 4 corresponds to different error models.
In step 3, fault alarm model includes at least fuel oil and calculates the result of analysis and its corresponding fault type data
With audio alert phrase.
A kind of metering method of fuel-metering device of the present invention, step is simple, and accurate measurement is reliable.
Claims (9)
1. a kind of fuel-metering device, which is characterized in that including tube body (1) and measuring instrument (5), the both ends of the tube body (1)
It is respectively arranged with oil inlet pipe (2) and flowline (3), the tube body (1) is internally provided with flow sensor (4), the flow
Sensor (4) is connect with measuring instrument (5), and control module (10), the control module are provided in the measuring instrument (5)
(10) it is connect with flow sensor (4), the control module (10) is connected with accumulator (11), and the accumulator (11) is connected with
Charging module (12), the charging module (12) include charging circuit (13), and measuring instrument (5) outer surface is provided with display
Shield (6), indicator light (7), loud speaker (8) and button (9), the display screen (6), indicator light (7), loud speaker (8) and button (9)
It is connect with control module (10).
2. a kind of fuel-metering device according to claim 1, which is characterized in that the charging circuit (13) includes integrated
Circuit U 5, the first end of the integrated circuit U5 pass through the series connection that adjustable resistance RP1, first resistor R1 and the first capacitance C1 are formed
Circuit is connect with the second end of integrated circuit U5, and the second end of the integrated circuit U5 passes through the first capacitance C1 and second resistance R2
The series circuit of composition is connect with the third end of integrated circuit U5, the second end of the integrated circuit U5 also respectively with first with it is non-
One of door U1 input terminals are connected with 3rd resistor R3, and another input terminal of the first NAND gate U1 is with integrated circuit U5's
8th end connects, and the 5th end, the 6th end and the 7th end of the integrated circuit U5 are grounded, and the tenth of the integrated circuit U5 the
End, the 12nd end, the 13rd end, the 14th end are connect with the anode of accumulator (11) BT1, and the 8th of the integrated circuit U5 the
End is connect, by the sun of the 4th resistance R4 and third Light-emitting diode LED 3 by the 4th resistance R4 with the base stage of triode VT1
Pole connects, and the anode of second Light-emitting diode LED 2 is connect by 3rd resistor R3 with the second end of integrated circuit U5, institute
The cathode of the cathode and third Light-emitting diode LED 3 of stating the second Light-emitting diode LED 2 is grounded, and the of the integrated circuit U5
Ten one end are grounded, and the emitter of the triode VT1 is connect with the moved end of switch S1, in two non-moving ends of switch S1, wherein
One non-moving end is grounded by the 5th resistance R5 ground connection, another non-moving end by the 6th resistance R6, the collection of the triode VT1
Electrode is connect with the cathode of the first Light-emitting diode LED 1, and the anode of first Light-emitting diode LED 1 is with accumulator BT1's
Cathode connects, and one end of the outlet side of the rectifier bridge BR1 is grounded by third capacitance C3, the other end and accumulator (11) BT1
Anode connection, the output end of the first NAND gate U1 connect with one of the second NAND gate U2 input terminal, described the
Another input end grounding of two NAND gate U2, one of output end and third NAND gate U3 of the second NAND gate U2
Input terminal connects, and another input terminal of third NAND gate U3 passes through the series circuit that the 8th resistance R8 and the 7th resistance R7 are formed
It is connect respectively with the input terminal of the output end of third NAND gate U3 and the 4th NAND gate U4, the output end of the 4th NAND gate U4
Connect with the output end of third NAND gate U3 by the series circuit of the second capacitance C2 and the 7th resistance R7 compositions, the described 4th and
The output end of NOT gate U4 is connect by crystal oscillator X1 with the anode of accumulator BT1.
3. a kind of fuel-metering device according to claim 2, which is characterized in that the model of the integrated circuit U5
CD4541, the switch S1 are single-pole double-throw switch (SPDT).
4. a kind of fuel-metering device according to claim 1, which is characterized in that the display screen (6) is liquid crystal display.
5. a kind of fuel-metering device according to claim 1, which is characterized in that the operating voltage of the loud speaker (8)
For 5V.
6. a kind of fuel-metering device according to claim 1, which is characterized in that the periphery of the measuring instrument (5) applies
There is erosion resistant coating.
7. such as a kind of metering method of fuel-metering device of claim 1~6 any one of them, which is characterized in that specific packet
Include following steps：
Step 1：Fuel oil enters tube body (1) from oil inlet pipe (2), is then flowed out from flowline (3), flow in the tube body (1) when
It waits, the data on flows of fuel oil is acquired in real time by flow sensor (4)；
Step 2：The error model that flow sensor (4) is based on by computing terminal carries out the real-time calculation and analysis of fuel flow；
Step 3：The Calculation results of step 2 intermediate fuel oil flow are assessed based on fault alarm model, to realize language
The keying of sound alarm module.
8. a kind of metering method of fuel-metering device according to claim 7, which is characterized in that in the step 2,
The corresponding different error model of different flow sensors (4).
9. a kind of metering method of fuel-metering device according to claim 7, which is characterized in that in the step 3, therefore
Hinder alarm model and includes at least the result and its corresponding fault type data and audio alert phrase that fuel oil calculating is analyzed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810327533.9A CN108362360A (en) | 2018-04-12 | 2018-04-12 | A kind of fuel-metering device and its metering method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810327533.9A CN108362360A (en) | 2018-04-12 | 2018-04-12 | A kind of fuel-metering device and its metering method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108362360A true CN108362360A (en) | 2018-08-03 |
Family
ID=63008202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810327533.9A Pending CN108362360A (en) | 2018-04-12 | 2018-04-12 | A kind of fuel-metering device and its metering method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108362360A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060074570A1 (en) * | 2004-03-02 | 2006-04-06 | Brad Belke | Electronic gas flow measurement and recording device |
| CN201066293Y (en) * | 2007-06-27 | 2008-05-28 | 空军油料研究所 | Wireless digital waist wheel capacity flowmeter |
| CN105320026A (en) * | 2014-07-11 | 2016-02-10 | 正文科技股份有限公司 | Monitoring system with power conversion module and sensor and method thereof |
| CN105571665A (en) * | 2016-03-04 | 2016-05-11 | 成都中横通科技有限公司 | Rechargeable flow instrument and charging method |
| CN206362386U (en) * | 2016-10-27 | 2017-07-28 | 牛犇 | A kind of SCM Based turbine flowmeter |
-
2018
- 2018-04-12 CN CN201810327533.9A patent/CN108362360A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060074570A1 (en) * | 2004-03-02 | 2006-04-06 | Brad Belke | Electronic gas flow measurement and recording device |
| CN201066293Y (en) * | 2007-06-27 | 2008-05-28 | 空军油料研究所 | Wireless digital waist wheel capacity flowmeter |
| CN105320026A (en) * | 2014-07-11 | 2016-02-10 | 正文科技股份有限公司 | Monitoring system with power conversion module and sensor and method thereof |
| CN105571665A (en) * | 2016-03-04 | 2016-05-11 | 成都中横通科技有限公司 | Rechargeable flow instrument and charging method |
| CN206362386U (en) * | 2016-10-27 | 2017-07-28 | 牛犇 | A kind of SCM Based turbine flowmeter |
Non-Patent Citations (1)
| Title |
|---|
| JIWEI.NET: "CD4541构成的镉镍电池自动充电器电路图", 《维库电子市场网HTTP://WWW.DZSC.COM/DATA/CIRCUIT-16612.HTML》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203387218U (en) | USB charger with battery pole electric quantity display | |
| CN105068016B (en) | Battery capacity display control method and control circuit | |
| CN201562007U (en) | Intelligent non-contact high voltage electroscope | |
| CN103691035A (en) | Medical intravenous infusion alarm | |
| CN206805286U (en) | A kind of device of DCS system simulations amount signal acquisition browsing real-time data | |
| CN1876256B (en) | Battery screening system and method | |
| CN103308776A (en) | Testing circuit of capacitive screen and testing method thereof | |
| CN103048583B (en) | A kind of LED charactron pick-up unit and method | |
| CN108362360A (en) | A kind of fuel-metering device and its metering method | |
| CN109407032A (en) | A kind of divider calibration of divider ratio platform | |
| CN204347186U (en) | A kind of polarity testing device of current transformer | |
| CN201449977U (en) | Photomultiplier tube linear parameter debugging device | |
| CN105467200B (en) | A kind of measurement method and its device of power current | |
| CN207232301U (en) | A kind of equipment of quick detection battery pack voltage sample line line sequence | |
| CN109613410A (en) | A fully automatic insulating oil dielectric strength tester | |
| CN105158573A (en) | Battery internal resistance detection circuit and battery internal resistance detection method and apparatus | |
| CN206773140U (en) | A kind of manual testing's control device for semiconductor test system | |
| CN2603579Y (en) | Comprehensive fault detector for communication line | |
| CN207780155U (en) | A kind of portable CT polarity testers based on pulse circuit | |
| CN207051430U (en) | A kind of hand-held semiconductor minority carrier lifetime tester | |
| CN111176940A (en) | Novel power meter and power consumption measuring method thereof | |
| CN106771948A (en) | A kind of metal-oxide-semiconductor cut-in voltage measurement apparatus | |
| CN209542768U (en) | A kind of full-automatic dielectric oil dielectric strength tester | |
| CN206725658U (en) | A kind of measuring circuit for monitoring oil pump resistance value size | |
| CN204188782U (en) | Controller power source failure detector circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180803 |
|
| RJ01 | Rejection of invention patent application after publication |