CN2379802Y - Instrument for marking diesel oil and testing cetane value - Google Patents
Instrument for marking diesel oil and testing cetane value Download PDFInfo
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- CN2379802Y CN2379802Y CN 98249054 CN98249054U CN2379802Y CN 2379802 Y CN2379802 Y CN 2379802Y CN 98249054 CN98249054 CN 98249054 CN 98249054 U CN98249054 U CN 98249054U CN 2379802 Y CN2379802 Y CN 2379802Y
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- test method
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- circuit
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Abstract
The utility model relates to an instrument for marking diesel oil and testing cetane value, which is mainly composed of a capacitance-type sensor, a capacitance or Frequency conversion circuit and a microprocessor. A printed circuit board 103 and batteries 104 are arranged on the inner part of the air hermetic casing 100 of the instrument; a joint 105 of a miniature printer and the sensor 200 which is connected with a movable joint 106 via a shield wire 107. The instrument tests the relative dielectric constant of the diesel oil via the sensor 200, and obtains correlation parameters via the microprocessor and inputs the correlation parameter into association formula to calculate the cetane value of the diesel oil. So the testing is very convenient and rapid, and problems of troubles, errors, requires of expensive precision equipment, etc. in the testing procedure by using traditional methods thoroughly.
Description
The utility model relates to the determinator of fuel, is specifically to measure the label of diesel oil and the device of cetane rating.
The fuel fraction of diesel motor is heavier, wherein contains a large amount of macromolecule alkane, when atmospheric temperature is reduced to a certain degree, because the crystallization of wax loses flowability diesel oil, uses and transportation brings difficulty thereby give.Though the congealing point of diesel oil can not be represented its minimum serviceability temperature, just begin have wax crystallization to separate out when should be before congealing point 5～10 ℃, they will stop up the aperture of fuel filter, reduce fuel delivery, reduce the power of engine, can interrupt fuel feeding when serious, engine is quit work, but congealing point important taking out notes, transportation and take care of index beyond doubt.Therefore, the label of commercial Dissel oil with congealing point as the criteria for classifying, if measured the condensing temperature of diesel oil, just known the label of diesel oil.
Because the complicacy and the boiling range of diesel component are very wide, existing conventional method is measured condensing temperature and is difficult to.Utilize the boundary that reduces method of temperature observation congealing point very indeterminate, observed deviation is bigger, and the equipment of this conventional determining method is outmoded, complex operation, and minute is longer.
The assay method of existing diesel cetane-number, be to utilize standard cetane pH-value determination pH machine, under standard test conditions, the detonation tendency of sample and the standard fuel (n-hexadecane and alpha-methyl-naphthalene or n-hexadecane and heptamethylnonane) of certain proportioning compared and measure out.Utilizing this method to measure cetane rating needs precision, valuable equipment and the technician of skilled operation, and consumes comparative fuel and oil plant to be measured, is an expensive experiment consuming time.In addition, though this method and mensuration machine through people update and perfect, it measures operating mode and measuring accuracy is improved constantly, because mensuration program and operation are quite complicated, the factor that influences measuring accuracy is various, thereby influences the reliability of actual measured results.
Along with science and technology development, domestic and international many R﹠D institutions are all in the physicochemical characteristics of research with diesel oil, and exploration is measured the new method of cetane rating or cetane rating is associated with other characterisitic parameters, and obtains the corresponding calculated formula.
Utilize formula to determine the cetane rating of diesel oil, comparatively economical, easy, but for measuring density d
20(g/cm
3) and mid-boiling point t
c, (℃), still must be sent to oil sample to be measured in the laboratory that is equipped with instrumentation and calculate again after the mensuration, its mensuration process still very bothers.
The purpose of this utility model promptly is the testing apparatus at above-mentioned existing diesel number and the valuable precision of cetane test method method needs, the problem of aspects such as mensuration work extremely bothers, and a kind of both easy diesel number fast and cetane test method device are provided.
The purpose of this utility model is to be achieved through the following technical solutions: a kind of diesel number and cetane test method device, mainly form by capacitance type sensor, electric capacity/frequency-conversion circuit and microprocessor, it comprises display (101), the gentle closed shell of keyboard (102) (100), printed-wiring board (PWB) (103) and battery (104) are housed in the inside of airtight enclosed shell (100), and upper side has mini-printer interface (105) and the sensor (200) that is connected with Active Interface (106) by shielding line (107); Wherein sensor (200) is a kind of capacitance type sensor, and the positive/negative plate of the parallel discharging that it is mainly made by nonmagnetic metal is formed.Circuit on the printed-wiring board (PWB) (103) comprises sample circuit (131), electric capacity/frequency-conversion circuit (132), microprocessor (133); Electric capacity/frequency-conversion circuit wherein (132) is made up of non-steady-state oscillation circuit, can adopt LC oscillatory circuit or 555 time-base oscillation circuit.Circuit on the printed-wiring board (PWB) (103) is also had additional temperature-compensation circuit (137) and computing machine interconnecting interface (138).
The utlity model has following advantage and effect:
1. this determinator mainly is made up of capacitance type sensor, electric capacity/frequency-conversion circuit and microprocessor, and is simple in structure, easy to operate.
2. thoroughly having solved needs to be equipped with specialized instrument and equipment in the prior art, and the very loaded down with trivial details trouble of mensuration process, and the problem of measuring accuracy difference, uses this determinator not only easy but also quick, and the measuring accuracy height, and repeatability is good.
The drawing of accompanying drawing is described as follows:
Fig. 1-a is diesel number and cetane test method apparatus structure synoptic diagram
Fig. 1-b is the side view of diesel number and cetane test method device
Fig. 2-a is annular concentric electrode capacitance formula sensor construction figure
Fig. 2-b is the annular concentric electrode capacitance formula sensor construction figure with temperature compensation performance
Fig. 3 is diesel number and cetane test method device circuit logic diagram
Fig. 4 is can be for a kind of embodiment figure of the electronic circuit that adopts
It is sensor that the utility model adopts with the capacity-type sensing element, is correlated variables with the relative dielectric constant, uses the mathematical statistics rule, the method for indirect determination diesel number, cetane rating and other physical parameters of petroleum fraction (being called for short the SW method).The particular content of this method and principle are described in detail in my application for a patent for invention, the structure of main this device of explanation in the utility model patented claim.
Diesel number of the present utility model and cetane test method device mainly are made up of capacitance type sensor, electric capacity/frequency-conversion circuit and microprocessor, it comprises: display 101, keyboard 102 gentle closed shells 100, in airtight enclosed shell 100, printed-wiring board (PWB) 103 is housed, battery 104 is equipped with in the bottom, upper side has mini-printer interface 105 and the sensor 200 that is connected with Active Interface 106 by shielding line 107.
The positive/negative plate of the parallel discharging that sensor 200 is mainly made by nonmagnetic metal is formed, positive/negative plate can be plate shaped parallel plate electrode, also can be the annular concentric pole plate or the pole plate of other form of parallel discharging at regular intervals, Fig. 2-a is depicted as and adopts annular concentric electrode capacitance formula sensor, it mainly contains the ring electrode of being processed into by nonmagnetic material 201,2011,202 and 2021, respectively have 2～6 pores 203,2031,204 and 2041 on it respectively, when measuring, be used for discharging the air in the inner chamber.The pole plate skeleton 205 that ring electrode 201,2011 is made by screw thread and identical material connects, and the insulation sleeve 206 that 202,2021 of ring electrodes are separated positive and negative pole plate by screw thread and being used to made from nylon (or teflon, bakelite, oil resistant plastics etc.) respectively links to each other with insulated connecting piece 207.In pole plate skeleton 205 top center one external handle or the standard microwave plug 210 of twisting the people as required arranged, and by center pit 208 introducings one lead A, this lead links to each other with ring electrode 202 by the hole 209 that is positioned at pole plate skeleton 205 and insulation sleeve 206 same positions, also links to each other with ring electrode 2021 simultaneously.
In order to eliminate since variation of temperature to the influence of test accuracy, sensor 200 also can adopt annular concentric electrode capacitance formula sensor with temperature compensation performance (Fig. 2-b).This sensor has by nonmagnetic material is processed into concentric annular negative pole 211,2111 and annular central electrode (positive pole) 212, respectively has 2～6 pores 213,2131 and 214 on it respectively, is used for discharging the air in the inner chamber when measuring.Pole plate skeleton 215 connections that annular negative pole 211,2111 is made by screw thread and identical material, 212 of annular central electrodes link to each other with the insulation sleeve made from nylon (or teflon, bakelite, oil resistant plastics etc.) and be used to separate positive and negative pole plate 216 by screw thread.In pole plate skeleton 215 top center one external handle that is screwed into as required or standard microwave plug 220 are arranged.Two binding posts 2201,2202 on the standard microwave plug 220 and temperature sensor 217 are connected by lead, and another binding post 2203 is also linked to each other with annular central electrode 212 by the hole 218 that is positioned at pole plate skeleton 215 and insulation sleeve 216 same positions by lead.
Logic diagram of circuit on the printed-wiring board (PWB) 103 as shown in Figure 3.After immersing capacitive transducer 200 in the oil sample to be measured, signal just is sent to electric capacity/frequency-conversion circuit 132 by sample circuit 131.Electric capacity/frequency-conversion circuit 132 is made up of non-steady-state oscillation circuit, and it can be the LC oscillatory circuit, and its oscillation frequency is
Also can be 555 time-base oscillation circuit, its oscillation frequency be
Wherein k is that constant is because C/C
o=ε
Rd/ ε
Ro=ε
RdSo the increase of oil sample relative dielectric constant C to be measured will cause the reduction of oscillation frequency, thereby electric capacity increases; Vice versa.Just can obtain the relative dielectric constant of diesel oil to be measured thus.Fig. 4 is can be for a kind of electronic circuit that adopts.The P of single-chip microcomputer 80C31/51
1.3～P
1.7Join with keyboard KEYBOARD4 * 6; The Q of keyboard KEYBOARD4 * 6 other ends and chip 273
0～Q
7Pin joins; The D of chip 273
0～D
7Pin by bus respectively with the D of chip 373
0～D
7With the DA7A of chip 61C16 and the B of chip 16265
0～B
7, chip 0801 B
0～B
7Join; The A of chip 373 and chip 27C64
0～A
7A with chip 61C16
0～A
7Join; The A of single-chip microcomputer 80C31/51 and chip 27C64
8～A
12A with chip 61C16
8～A
12Join; After joining, capacitance type sensor C and frequency-conversion circuit C/f insert the To/P of single-chip microcomputer 80C31/51
3.4Pin;
Mini-printer interface RS-232 inserts the P of single-chip microcomputer 80C31/51
1.2, RXD, TXD and GND pin; The CS pin of chip 0801 and the P of single-chip microcomputer 80C31/51
1.0Join; The INTR pin of chip 0801 and the INT1 of single-chip microcomputer 80C31/51 join; The WR pin of chip 0801 and the WR pin of single-chip microcomputer 80C31/51 join; The RD pin of chip 0801 and the RD pin of single-chip microcomputer 80C31/51 join; The WR pin of chip 0801 is simultaneously with chip 16265
The WE pin of pin and chip 61C16 joins; The RD pin while of chip 0801 joins with the OE pin of chip 61C16; The P of the WR of chip 0801 and RD pin and single-chip microcomputer 80C31/51
2.5Pin joins by the E pin of gate circuit and chip 16265; The RS pin of chip 16265 and the P of single-chip microcomputer 80C31/51
2.6Pin joins; The CE pin of chip 61C16 and the P of single-chip microcomputer 80C31/51
2.7Pin joins; The OE pin of chip 27C64 and the PSEN pin of single-chip microcomputer 80C31/51 join; The CLK pin of chip 273 joins with the EA pin of single-chip microcomputer 80C31/51 and the G pin of chip 373 respectively.
By regretional analysis, obtain the relative density d of diesel oil in the time of 20 ℃ to a large amount of measured datas
20, mid-boiling point t
c, congealing point t
dWith aniline point t
aWith relative dielectric constant ε
RdAnd the relation of the related function between the diesel cetane-number.
To be stored in the microprocessor 133 by the computing degree that each related function relation is write.After being sent to microprocessor 133 by the capacitance that obtains after electric capacity/frequency transformation, just can obtain label (congealing point) and the cetane rating and the cetane index of diesel oil, also can obtain the index of refraction n of diesel oil to be measured simultaneously through computing
dWith other important physical parameters such as mean molecular weight M.Then, will calculate the gained result by display interface device 134 and/or 135 outputs of mini-printer interface.In addition, also has keyboard interface 136.As needs, can increase temperature-compensation circuit 137 and computing machine interconnecting interface 138.
Claims (9)
1. diesel number and cetane test method device, mainly form by capacitance type sensor, electric capacity/frequency-conversion circuit and microprocessor, it comprises display (101), the gentle closed shell of keyboard (102) (100), it is characterized in that: printed-wiring board (PWB) (103) and battery (104) are housed in the inside of airtight enclosed shell (100), and upper side has mini-printer interface (105) and the sensor (200) that is connected with Active Interface (106) by shielding line (107); Wherein sensor (200) is a kind of capacitance type sensor, and the positive/negative plate of the parallel discharging that it is mainly made by nonmagnetic metal is formed.
2. diesel number according to claim 1 and cetane test method device is characterized in that: the positive/negative plate of said parallel discharging is the annular concentric pole plate.
3. diesel number according to claim 1 and cetane test method device is characterized in that: the positive/negative plate of said parallel discharging is the plate shaped parallel plate electrode or the pole plate of other form of parallel discharging at regular intervals.
4. diesel number according to claim 2 and cetane test method device, it is characterized in that: said concentric annular pole plate mainly is made up of ring electrode (201), (2011), (202) and (2021), the pole plate skeleton (205) that make by screw thread and identical material ring electrode (201), (2011) connects, and ring electrode (202), (2021) then link to each other with insulated connecting piece (207) with insulation sleeve (206) by screw thread respectively; In pole plate skeleton (205) top center one standard microwave plug (210) is arranged, and by center pit (208) introducing one lead (A), this lead (A) links to each other with ring electrode (202) by the hole (209) that is positioned at pole plate skeleton (205) and insulation sleeve (206) same position, also links to each other with ring electrode (2021) simultaneously.
5. diesel number according to claim 4 and cetane test method device is characterized in that: respectively have 2～6 pores (203), (2031), (204) and (2041) on ring electrode (201), (2011), (202) and (2021) respectively.
6. diesel number according to claim 2 and cetane test method device, it is characterized in that: said concentric annular pole plate, mainly form by annular concentric negative pole (211), (2111) and annular central electrode (212), the pole plate skeleton (215) that make by screw thread and identical material annular negative pole (211), (2111) connects, and annular central electrode (212) then links to each other with insulation sleeve (216) by screw thread; In pole plate skeleton (215) top center one standard microwave plug (220) is arranged, two binding posts (2201) on the standard microwave plug (220), (2202) are connected with temperature sensor (217) by lead, and another binding post is linked to each other with annular central electrode (212) by the hole (218) that is positioned at pole plate skeleton (215) and insulation sleeve (216) same position by lead.
7. diesel number according to claim 6 and cetane test method device is characterized in that: respectively have 2～6 pores (213), (2131) and (214) on annular negative pole (211), (2111) and annular central electrode (212) respectively.
8. diesel number according to claim 1 and cetane test method device is characterized in that: the circuit on the printed-wiring board (PWB) (103) comprises sample circuit (131), electric capacity/frequency-conversion circuit (132), microprocessor (133); Electric capacity/frequency-conversion circuit wherein (132) is made up of non-steady-state oscillation circuit, can adopt LC oscillatory circuit or 555 time-base oscillation circuit.
9. diesel number according to claim 8 and cetane test method device is characterized in that: the circuit on the printed-wiring board (PWB) (103) is also had additional temperature-compensation circuit (137) and computing machine interconnecting interface (138).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98249054 CN2379802Y (en) | 1998-11-25 | 1998-11-25 | Instrument for marking diesel oil and testing cetane value |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98249054 CN2379802Y (en) | 1998-11-25 | 1998-11-25 | Instrument for marking diesel oil and testing cetane value |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2379802Y true CN2379802Y (en) | 2000-05-24 |
Family
ID=33993914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98249054 Expired - Fee Related CN2379802Y (en) | 1998-11-25 | 1998-11-25 | Instrument for marking diesel oil and testing cetane value |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2379802Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104483464A (en) * | 2014-11-19 | 2015-04-01 | 上海沪顺石化装备有限公司 | Device and method for determining cetane number of diesel and biodiesel |
| CN111650256A (en) * | 2020-06-17 | 2020-09-11 | 新乡航空工业(集团)有限公司 | Portable aviation turbine absorbent cotton oil content detection sensor |
-
1998
- 1998-11-25 CN CN 98249054 patent/CN2379802Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104483464A (en) * | 2014-11-19 | 2015-04-01 | 上海沪顺石化装备有限公司 | Device and method for determining cetane number of diesel and biodiesel |
| CN104483464B (en) * | 2014-11-19 | 2016-08-31 | 上海沪顺石化装备有限公司 | For measuring diesel oil and the device and method of biodiesel Cetane number |
| CN111650256A (en) * | 2020-06-17 | 2020-09-11 | 新乡航空工业(集团)有限公司 | Portable aviation turbine absorbent cotton oil content detection sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |