CN203705013U - Double-capacitor sensor - Google Patents
Double-capacitor sensor Download PDFInfo
- Publication number
- CN203705013U CN203705013U CN201420088232.2U CN201420088232U CN203705013U CN 203705013 U CN203705013 U CN 203705013U CN 201420088232 U CN201420088232 U CN 201420088232U CN 203705013 U CN203705013 U CN 203705013U
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- Prior art keywords
- cylinder
- barrel
- cable
- urceolus
- inner core
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- Expired - Lifetime
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- 239000003990 capacitor Substances 0.000 title claims abstract description 21
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 239000012212 insulator Substances 0.000 claims description 25
- 238000003032 molecular docking Methods 0.000 claims description 16
- 238000005259 measurement Methods 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 description 19
- 230000035945 sensitivity Effects 0.000 description 10
- 239000007789 gas Substances 0.000 description 8
- 230000006978 adaptation Effects 0.000 description 5
- 239000003949 liquefied natural gas Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000001939 inductive effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The utility model discloses a double-capacitor sensor. A lower middle barrel and an upper middle barrel are arranged in an outer barrel, the upper middle barrel is arranged right above the lower middle barrel, and an inner barrel is arranged in the upper middle barrel and is simultaneously arranged inside the lower middle barrel and the upper middle barrel. The lower middle barrel, the outer barrel and the inner barrel form a capacitor C1 to be detected by a capacitor detection circuit simultaneously, the upper middle barrel, the outer barrel and the inner barrel form a capacitor C2 to be detected by the capacitor detection circuit, and a C1 capacitance value and a C2 capacitance value are identical. The inner barrel improves the measurement flexibility, the outer barrel and the inner barrel are connected electrically and serve as negative electrodes of the capacitors, the lower middle barrel and the upper middle barrel have capacitance values relative to the outer barrel and also have capacitance values relative to the inner barrel, the overall flexibility is the sum of two flexibilities. The capacitance values are stable and free of interference and are not changed when a lower middle barrel cable or an upper middle barrel cable penetrates through the inner barrel or is stored, and interference is not produced when the cable shakes in the inner barrel. The redundant portions of the lower middle barrel cable and the upper middle barrel cable are stored in the inner barrel.
Description
Technical field
The utility model relates to the capacitance type sensor field using in low temperature cylinder or storage tank, is specifically related to a kind of two-capacitance sensor.
Background technology
Along with the support of national policy, rapidly, the level gauging in its bottle is the liquid level gauge with capacitance type sensor mostly for industry bottle and vehicle-mounted bottle development in recent years.But conventional liquid level gauge must be demarcated zero-bit, is difficult to know true zero-bit at this very moment in gas cylinder while having liquid, and the easily impact of liquid body medium.
The Chinese patent that the patent No. is " 201220576669.1 " discloses a kind of three-wire type two-capacitance sensor, comprise outer tube, upper inner tube and lower inner tube are within the outer tube set, described upper inner and outer tubes form reference capacitive transducer, lower inner and outer tubes form measures capacitive transducer, between described upper inner tube and lower inner tube, is provided with the bracing or strutting arrangement for its insulation is linked together.The automatic calibration that this three-wire type two-capacitance sensor can be realized level gauging in LNG gas cylinder with self-adaptation LNG due to the different change in dielectric constant that cause in liquid source, but its sensitivity does not reach the request for utilization of some specific environment.
The Chinese patent that the patent No. is " 201120403939.4 " discloses two coaxial capacitance sensors for a kind of liquefied gas, its composition comprises polytetrafluoroethylcable cable, urceolus and middle cylinder, in middle cylinder, be provided with inner core, inner core is connected with urceolus conduction, middle cylinder is connected with polytetrafluoroethylcable cable heart yearn conduction, between urceolus, middle cylinder, inner core, is provided with gap.This sensor is used for improving LNG fuel tank liquid level measurement precision and strengthens antijamming capability, and it is single capacitor sensor, has high sensitivity, but it cannot carry out automatic calibration and self-adaptation under liquid medium impact.
To sum up patent, does not have the technology can be at highly sensitive automatic calibration and the adaptive sensor realized simultaneously.
Utility model content
The purpose of this utility model is can be in highly sensitive while automatic calibration and adaptive function in order to realize, and provide a kind of two-capacitance sensor, the principle that this two-capacitance sensor utilizes the variation of liquid in container liquid level that capacitance is changed is measured, realize the full position of automatic Calibration zero-bit and automatic Calibration, the variation of specific inductive capacity does not affect measuring accuracy, solves existing sensor and is difficult to the problem that simultaneously realizes automatic calibration and adaptation function highly sensitive.
The technical scheme in the invention for solving the above technical problem is: two-capacitance sensor, comprise urceolus, in described urceolus, be provided with lower cylinder and upper cylinder, and upper cylinder be arranged on lower cylinder directly over, in described upper cylinder, be provided with inner core, and inner core is arranged on the inside of lower cylinder and upper cylinder simultaneously, and urceolus and inner core are electrically connected; Lower cylinder holds with urceolus, inner core formation power supply the capacitor C 1 that testing circuit detects simultaneously, and the upper cylinder while forms power supply with urceolus, inner core and holds the capacitor C 2 that testing circuit detects, and C1 capacitance is equal with C2 capacitance.With respect to existing single capacitor sensor or two-capacitance sensor, inner core to arrange effect of the present utility model be clearly, first be to have improved measurement sensitivity, urceolus and inner core electrical connection, it is the negative pole of electric capacity, so lower cylinder has capacitance with the relative urceolus of upper cylinder, inner core also has capacitance relatively, and total sensitivity is these two sensitivity sums.It is noiseless that next is that capacitance is stablized, lower cylinder cable or upper cylinder cable from inner core through or while depositing, capacitance can not change, cable rocks Shi Buhui and produces and disturb in inner core.It three is lower cylinder cable and upper cylinder cable redundance can be left in inner core, is convenient to the layout of multi-thread cable.
The lower end of urceolus is provided with base, and the top of urceolus is provided with upper bracket, and the bottom of inner core and the bottom of urceolus all fix with base, and the top of inner core and the top of urceolus are all fixed with upper bracket; Between lower cylinder and base, be provided with lower insulator, and lower insulator is fixed with lower cylinder and base simultaneously; Between lower cylinder and upper cylinder, be provided with middle insulator, middle insulator is fixed with the top of lower cylinder and the bottom of upper cylinder simultaneously, between upper cylinder and upper bracket, be provided with upper insulator, and upper insulator is fixed with upper cylinder and upper bracket simultaneously, lower cylinder and upper are that diameter is identical and coaxially assemble.Upper bracket be as to the top of urceolus, upper cylinder and inner core as support component, and base is also as supporting construction, guarantee the insulation function between lower cylinder and upper cylinder.
Upper bracket top is provided with cable docking facilities, cable docking facilities is connected with respectively upper cylinder shielded cable and lower cylinder shielded cable, lower cylinder shielded cable one end is through being connected with lower cylinder after inner core, the other end stretches out urceolus after being electrically connected with cable docking facilities, has formed the capacitor C 1 detecting for capacitive detection circuit; Upper cylinder shielded cable one end is connected with upper cylinder, and the other end stretches out urceolus after being electrically connected with cable docking facilities, has formed the capacitor C 2 detecting for capacitive detection circuit, and C1 capacitance is equal with C2 capacitance.Full of the utility model energy automatic Calibration zero-bit and automatic Calibration, C1 is capacitance corresponding to lower this branch road of cylinder, and C2 is capacitance corresponding to upper this branch road of cylinder, and the lenth ratio of setting middle cylinder and upper cylinder equals K, and after electric capacity production is qualified, C1 equals C2.In the time that the liquid level in gas cylinder is under middle insulator, the C2 zero value now detecting just equals the zero value of C1, in the time that the liquid level in gas cylinder is on middle insulator, now detect the full place value of C1, the difference that full C1 place value is subtracted to C1 zero value just equals the full position increment size of C2 divided by K, this increment size adds that C2 zero value just equals the full place value of C2, the full place value of zero-bit that is C1 and C2 can be calculated, liquid level can calculate at arbitrary height so, so full position of the utility model energy automatic Calibration zero-bit and automatic Calibration, and the specific inductive capacity in whole computation process neutralization medium is irrelevant, and the lenth ratio of lower cylinder and upper cylinder can be arbitrary value.Solve existing sensor and be difficult to the problem that simultaneously realizes automatic calibration and adaptation function highly sensitive.
The effect of cable docking facilities, first be to be convenient to batch production, after the production testing of electric capacity cylindrical shell is qualified, just carry out the docking of signal cable, the length of general signal cable is 1.5 meters to 2.5 meters, if so long cable is followed the assembling process of whole capacitive transducer, speed causes a hidden trouble slowly and easily, next is to improve product percent of pass, due to the reason of production and assembly or materials variances, can cause some difference of value of two electric capacity, the length that now can change lower cylinder cable or upper cylinder cable makes two electric capacity accurately reach the value of regulation, can make qualification rate arrive 100%.
To sum up, the beneficial effects of the utility model are:
1, first inner core is to have improved measurement sensitivity, and urceolus and inner core electrical connection is the negative pole of electric capacity, so lower cylinder has capacitance with the relative urceolus of upper cylinder, inner core also has capacitance relatively, and total sensitivity is these two sensitivity sums;
2, be secondly that capacitance is stablized noiseless, lower cylinder cable or upper cylinder cable from inner core through or while depositing, capacitance can not change, cable rocks Shi Buhui and produces and disturb in inner core;
3, realize the sensitivity of measuring, also realize automatic calibration and adaptation function simultaneously;
4, it four is lower cylinder cable and upper cylinder cable redundance can be left in inner core.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Mark and corresponding parts title in accompanying drawing: 1-base; 2-lower insulator; 3-lower cylinder; 4-lower cylinder shielded cable; 5-inner core; 6-urceolus; 7-middle insulator; 8-upper cylinder; 9-upper insulator; 10-upper cylinder shielded cable; 11-upper bracket; 12-regulating sleeve; 13-cable docking facilities; 14-cable is drawn cover; 15-signal cable.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is done to detailed description further, but embodiment of the present utility model is not limited to this.
Embodiment 1:
As shown in Figure 1, two-capacitance sensor, comprise urceolus 6, in described urceolus 6, be provided with lower cylinder 3 and upper cylinder 8, and upper cylinder 8 be arranged on lower cylinder 3 directly over, in described upper cylinder 8, be provided with inner core 5, and inner core 5 is arranged on the inside of lower cylinder 3 and upper cylinder 8 simultaneously, urceolus 6 and inner core 5 are electrically connected; Form with urceolus 6, inner core 5 capacitor C 1 detecting for capacitive detection circuit for lower 3, upper 8 forms with urceolus 6, inner core 5 capacitor C 2 detecting for capacitive detection circuit simultaneously, and C1 capacitance is equal with C2 capacitance simultaneously.Utilize the inner core arranging in two-capacitance sensor, the full position of energy automatic Calibration zero-bit and automatic Calibration, C1 is capacitance corresponding to lower this branch road of cylinder, C2 is capacitance corresponding to upper this branch road of cylinder, the lenth ratio of setting middle cylinder and upper cylinder equals K, and after electric capacity production is qualified, C1 equals C2.In the time that the liquid level in gas cylinder is under middle insulator, the C2 zero value now detecting just equals the zero value of C1, in the time that the liquid level in gas cylinder is on middle insulator, now detect the full place value of C1, the difference that full C1 place value is subtracted to C1 zero value just equals the full position increment size of C2 divided by K, this increment size adds that C2 zero value just equals the full place value of C2, the full place value of zero-bit that is C1 and C2 can be calculated, liquid level can calculate at arbitrary height so, so full position of the utility model energy automatic Calibration zero-bit and automatic Calibration, and the specific inductive capacity in whole computation process neutralization medium is irrelevant, and the lenth ratio of lower cylinder and upper cylinder can be arbitrary value.Can either solve interference problem, realize the sensitivity of measuring, also realize automatic calibration and adaptation function, solve existing sensor and be difficult to the problem that simultaneously realizes automatic calibration and adaptation function highly sensitive simultaneously.
Embodiment 2:
The lower end of urceolus 6 is provided with base 1 as shown in Figure 1, and the top of urceolus 6 is provided with upper bracket 11, and the bottom of the bottom of inner core 5 and urceolus 6 is all fixing with base 1, and the top of the top of inner core 5 and urceolus 6 is all fixing with upper bracket 11; Between lower cylinder 3 and base 1, be provided with lower insulator 2, and lower insulator 2 is simultaneously fixing with lower cylinder 3 and base 1; Between lower cylinder 3 and upper cylinder 8, be provided with middle insulator 7, middle insulator 7 is fixed with the top of lower cylinder 3 and the bottom of upper cylinder 8 simultaneously, between upper cylinder 8 and upper bracket 11, be provided with upper insulator 9, and upper insulator 9 is simultaneously fixing with upper cylinder 8 and upper bracket 11, lower cylinder 3 and upper cylinder 8 are the identical and coaxially assemblings of diameter; Upper bracket 11 tops are provided with cable docking facilities 13, cable docking facilities 13 is connected with respectively upper cylinder shielded cable 10 and lower cylinder shielded cable 4, lower cylinder shielded cable 4 one end are connected through rear and lower 3 of inner core 5, the other end stretches out urceolus 6 after being electrically connected with cable docking facilities 13, has formed the capacitor C 1 detecting for capacitive detection circuit; Upper cylinder shielded cable 10 one end are connected with upper cylinder 8, and the other end stretches out urceolus 6 after being electrically connected with cable docking facilities 13, has formed the capacitor C 2 detecting for capacitive detection circuit, and C1 capacitance is equal with C2 capacitance.Lower cylinder shielded cable 4 is connected with lower 3 after through the inside of inner core 5 and base 1, and the connection of cable can adopt connector lug, also can, select according to actual production and environment for use.On the outer wall of the top of urceolus 6, be sheathed with regulating sleeve 12, cable is drawn cover 14 through regulating sleeve 12, upper cylinder shielded cable 10 forms signal cable 15 after being connected with cable docking facilities 13 with lower cylinder shielded cable 4, being arranged on cable draws in cover 14, with extraneous corresponding capacitance detecting connection, form the detection relation to C1 and C2.
This two-capacitance sensor is mainly used in the level gauging of the cryogenic liquids such as liquid oxygen in gas cylinder or storage tank, liquid nitrogen, liquid argon, liquefied natural gas (LNG), also can be used for the measurement of non-conductive medium liquid level in normal temperature, any container of low temperature.
As mentioned above, can realize preferably the utility model.
Claims (4)
1. two-capacitance sensor, comprise urceolus (6), in described urceolus (6), be provided with lower cylinder (3) and upper cylinder (8), and upper cylinder (8) be arranged on lower cylinder (3) directly over, it is characterized in that, in described upper cylinder (8), be provided with inner core (5), and inner core (5) is arranged on the inside of lower cylinder (3) and upper (8) simultaneously, urceolus (6) and inner core (5) are electrically connected; Lower cylinder (3) forms with urceolus (6), inner core (5) capacitor C 1 detecting for capacitive detection circuit simultaneously, upper (8) form with urceolus (6), inner core (5) capacitor C 2 detecting for capacitive detection circuit simultaneously, and C1 capacitance is equal with C2 capacitance.
2. two-capacitance sensor according to claim 1, it is characterized in that, the lower end of described urceolus (6) is provided with base (1), the top of urceolus (6) is provided with upper bracket (11), and the bottom of the bottom of inner core (5) and urceolus (6) is all fixing with base (1), the top of the top of inner core (5) and urceolus (6) is all fixing with upper bracket (11).
3. two-capacitance sensor according to claim 2, is characterized in that, between described lower cylinder (3) and base (1), is provided with lower insulator (2), and lower insulator (2) is simultaneously fixing with lower cylinder (3) and base (1); Between lower cylinder (3) and upper cylinder (8), be provided with middle insulator (7), middle insulator (7) is fixed with the top of lower cylinder (3) and the bottom of upper cylinder (8) simultaneously, between upper cylinder (8) and upper bracket (11), be provided with upper insulator (9), and upper insulator (9) is simultaneously fixing with upper cylinder (8) and upper bracket (11), lower cylinder (3) and upper (8) are that diameter is identical and coaxially assemble.
4. two-capacitance sensor according to claim 2, it is characterized in that, described upper bracket (11) top is provided with cable docking facilities (13), cable docking facilities (13) is connected with respectively upper cylinder shielded cable (10) and lower cylinder shielded cable (4), lower cylinder shielded cable (4) one end is through being connected with lower cylinder (3) after inner core (5), the other end stretches out urceolus (6) after being electrically connected with cable docking facilities (13), has formed the capacitor C 1 detecting for capacitive detection circuit; Upper cylinder shielded cable (10) one end is connected with upper cylinder (8), and the other end stretches out urceolus (6) after being electrically connected with cable docking facilities (13), has formed the capacitor C 2 detecting for capacitive detection circuit, and C1 capacitance is equal with C2 capacitance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420088232.2U CN203705013U (en) | 2014-02-28 | 2014-02-28 | Double-capacitor sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420088232.2U CN203705013U (en) | 2014-02-28 | 2014-02-28 | Double-capacitor sensor |
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| Publication Number | Publication Date |
|---|---|
| CN203705013U true CN203705013U (en) | 2014-07-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420088232.2U Expired - Lifetime CN203705013U (en) | 2014-02-28 | 2014-02-28 | Double-capacitor sensor |
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| Country | Link |
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| CN (1) | CN203705013U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104236672A (en) * | 2014-09-30 | 2014-12-24 | 四川泛华航空仪表电器有限公司 | Multi-redundancy capacitance type oil quantity sensor |
| CN106546517A (en) * | 2016-09-29 | 2017-03-29 | 中国农业大学 | Magnetorheological fluid sedimentation process electric capacity monitoring device and monitoring method |
| CN106989662A (en) * | 2017-05-09 | 2017-07-28 | 天津理工大学 | A kind of wide range capacitor type wave-height sensing device |
| CN113252136A (en) * | 2021-05-12 | 2021-08-13 | 北京布莱迪测控仪表有限公司 | Liquid level sensor |
-
2014
- 2014-02-28 CN CN201420088232.2U patent/CN203705013U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104236672A (en) * | 2014-09-30 | 2014-12-24 | 四川泛华航空仪表电器有限公司 | Multi-redundancy capacitance type oil quantity sensor |
| CN106546517A (en) * | 2016-09-29 | 2017-03-29 | 中国农业大学 | Magnetorheological fluid sedimentation process electric capacity monitoring device and monitoring method |
| CN106546517B (en) * | 2016-09-29 | 2019-03-08 | 中国农业大学 | Magnetorheological fluid sedimentation process capacitor monitoring device and monitoring method |
| CN106989662A (en) * | 2017-05-09 | 2017-07-28 | 天津理工大学 | A kind of wide range capacitor type wave-height sensing device |
| CN113252136A (en) * | 2021-05-12 | 2021-08-13 | 北京布莱迪测控仪表有限公司 | Liquid level sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140709 |