CN105928587A - High-precision digital liquid level meter - Google Patents

High-precision digital liquid level meter Download PDF

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Publication number
CN105928587A
CN105928587A CN201610471780.7A CN201610471780A CN105928587A CN 105928587 A CN105928587 A CN 105928587A CN 201610471780 A CN201610471780 A CN 201610471780A CN 105928587 A CN105928587 A CN 105928587A
Authority
CN
China
Prior art keywords
space
liquidometer
accuracy
housing
monocrystalline
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
Application number
CN201610471780.7A
Other languages
Chinese (zh)
Inventor
陈树军
黄新亚
孙建华
张维新
周豪
蒋惠东
曹磊
张建平
潘洋
卞凯华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzhou Saizhida Intelligent Science & Technology Co Ltd
Original Assignee
Suzhou Saizhida Intelligent Science & Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Suzhou Saizhida Intelligent Science & Technology Co Ltd filed Critical Suzhou Saizhida Intelligent Science & Technology Co Ltd
Priority to CN201610471780.7A priority Critical patent/CN105928587A/en
Publication of CN105928587A publication Critical patent/CN105928587A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01FMEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00Indicating or measuring liquid level, or level of fluent solid material, e.g. indicating in terms of volume, indicating by means of an alarm
    • G01F23/14Indicating or measuring liquid level, or level of fluent solid material, e.g. indicating in terms of volume, indicating by means of an alarm by measurement of pressure

Abstract

The invention discloses a high-precision digital liquid level meter, which comprises a casing, wherein the casing is provided with a first space used for accommodating a processor; a third space is formed under the first space; a monocrystalline silicon pressure sensor is arranged in the third space, and is connected with the processor. The monocrystalline silicon pressure sensor is used and is applied to the liquid level meter, so that the detection precision of the liquid level meter can be greatly improved.

Description

High accuracy number liquidometer
Technical field
The application relates to a kind of high accuracy number liquidometer, is mainly used in the technical fields such as LNG storage tank.
Background technology
Vehicle-mounted LNG gas cylinder belongs to Cryo Heat Insulation bottle, the particularity made due to it, and filled liquefied gas The particularity of body, it is desirable to liquidometer must have high reliability, the most once breaks down, vehicle-mounted LNG gas cylinder will be unable to normally use, and hardly possible keeps in repair it, thus can cause LNG Scrapping of gas cylinder.Market reaction capacitance type liquid level in actual use is in respect of faulty sensor, display The defects such as mistake, make LNG vehicle in travelling way because being forced to stop without fuel, give and produce LNG automobile Producer and user bring the biggest trouble.
It is essential that pressure transducer has become the numerous areas such as commercial production, Smart Home, environmental conservation One of electronic devices and components, and in pressure sensor, the chip of pressure transducer directly determines pressure The service behaviour of sensor.Existing pressure sensor chip is generally by measuring pressure to the electricity in chip Hinder the impact of resistance and then realize the detection of pressure, but existing chip structure is difficult to meet extreme environment Work requirements, i.e. its overvoltage performance is unsatisfactory.
Traditional liquidometer mostly just arranges one and installs cavity, CPU, display, binding post etc. All it is arranged in this installation cavity body, but when liquidometer uses, needs often to open this installation cavity, The CPU needing to seal and display etc. are also exposed under steam, affect its service life.
Summary of the invention
It is an object of the invention to provide a kind of high accuracy number liquidometer, to overcome of the prior art asking Topic.
For achieving the above object, the present invention provides following technical scheme:
The open a kind of high accuracy number liquidometer of the embodiment of the present application, including housing, this housing has receiving First space of processor, the 3rd space formed below in this first space, set in described 3rd space Being equipped with monocrystalline-silicon pressure transducer, this monocrystalline-silicon pressure transducer is connected to described processor.
Preferably, in above-mentioned high accuracy number liquidometer, between described first space and the 3rd space Being formed with intercommunicating pore, described monocrystalline-silicon pressure transducer is sealed in described intercommunicating pore.
Preferably, in above-mentioned high accuracy number liquidometer, the edge of described monocrystalline-silicon pressure transducer And threadedly it is rotatably assorted between the inwall in the 3rd space.
Preferably, in above-mentioned high accuracy number liquidometer, described monocrystalline-silicon pressure transducer includes lining The end and be formed at substrate surface monocrystalline silicon thin film, it is formed between described monocrystalline silicon thin film and substrate surface Vacuum chamber.
Preferably, in above-mentioned high accuracy number liquidometer, described 3rd space is airtight cavity.
Preferably, in above-mentioned high accuracy number liquidometer, described housing offers and described first The second opening that space communicates, this second opening part is capped with the second lid, and described second lid is detachable It is fixed on described housing.
Preferably, in above-mentioned high accuracy number liquidometer, it is provided with numeral in described first space aobvious Display screen, the corresponding described digital display screen position of described second lid is provided with transparent window.
Preferably, in above-mentioned high accuracy number liquidometer, the material of described housing is aluminium alloy.
Compared with prior art, it is an advantage of the current invention that:
(1), the parts that this new hull is internal are used by difference and require to be arranged at two independent spaces In, wherein CPU, display etc. need the parts isolating steam to be arranged in the first airtight space, its He needs the binding post etc. being often connected with outside line to be arranged in second space, and second space passes through First lid can be opened.It is arranged such, CPU, display etc. can be played a protective role, improve Its service life.
(2), this novel employing monocrystalline-silicon pressure transducer be applied to liquidometer, its inspection can be greatly improved Survey precision.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present application or technical scheme of the prior art, below will be to reality Execute the required accompanying drawing used in example or description of the prior art to be briefly described, it should be apparent that below, Accompanying drawing in description is only some embodiments described in the application, for those of ordinary skill in the art From the point of view of, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 show the structural representation of digital level indicator in the specific embodiment of the invention;
Fig. 2 show the side view of digital level indicator in the specific embodiment of the invention;
Fig. 3 show the sectional view of digital level indicator in the specific embodiment of the invention;
Fig. 4 show the structural representation of sensor in the specific embodiment of the invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out Detailed description, it is clear that described embodiment is only a part of embodiment of the present invention rather than complete The embodiment in portion.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creation Property work on the premise of the every other embodiment that obtained, broadly fall into the scope of protection of the invention.
In conjunction with shown in Fig. 1 to Fig. 3, digital level indicator, including housing 1, this housing is separated into by dividing plate 2 The first separate space 11 and second space 12, the first space 11 is airtight cavity, this cavity Inside it is provided with processor, in second space 12, is provided with binding post, housing offers and second space The first opening communicated, this first opening part is capped with the first lid 3, and the first lid 3 is removably fixed in On housing 1.Preferably, threadedly it is rotationally connected between the first lid 3 and housing 1.
In this technical scheme, the parts of enclosure interior are used by difference and require to be arranged at two independent skies In, wherein CPU, display etc. need the parts isolating steam to be arranged in the first airtight space, Other need the binding post etc. being often connected with outside line to be arranged in second space, and second space leads to Cross the first lid can open.It is arranged such, CPU, display etc. can be played a protective role, carry Its service life high.
Offering the second opening communicated with the first space 11 on housing 1, this second opening part is capped with Two lids 4, the second lid 4 is removably fixed on housing.Preferably, the second lid 4 and the second opening Between be threadedly rotationally connected.
Further, digital display screen 5, the second lid correspondence numerical monitor it are provided with in the first space 11 Screen position is provided with transparent window.
In this technical scheme, when the second lid is opened, the installation of CPU and display can be facilitated, second After lid is fixing with housing, can realize sealing to the first space.
Preferably, the first lid 3 and the second lid 4 are respectively formed in the both sides that housing 1 is contrary.
Further, housing 1 offers at least one wiring hole 6 communicated with second space.
In a preferred embodiment, housing offering two wiring holes communicated with second space, these are two years old Individual wiring hole lays respectively at the both sides of housing.The opening part of wiring hole is sealed with the 3rd lid 7.
In this technical scheme, by being positioned at the wiring hole of diverse location, different installations can be adaptable to Position, during use, can select nearest wiring hole to be attached, and untapped wiring hole is by lid Body seals.
3rd space formed below in the first space, is provided with monocrystal silicon pressure and passes in described 3rd space Sensor, this monocrystalline-silicon pressure transducer is connected to processor.
Further, intercommunicating pore, described monocrystal silicon pressure it are formed with between described first space and the 3rd space Force transducer is sealed in described intercommunicating pore.
Further, screw thread is passed through between edge and the inwall in the 3rd space of this monocrystalline-silicon pressure transducer Mode is rotatably assorted.
Shown in Fig. 4, monocrystalline-silicon pressure transducer includes substrate 81 and is formed at substrate 81 surface Monocrystalline silicon thin film 82, is formed with vacuum chamber 83 between monocrystalline silicon thin film 82 and substrate surface.
In this technical scheme, use monocrystalline-silicon pressure transducer to be applied to liquidometer, can be greatly improved it Accuracy of detection.
It should be noted that in this article, the relational terms of such as first and second or the like is used merely to One entity or operation are separated with another entity or operating space, and not necessarily requires or imply Relation or the order of any this reality is there is between these entities or operation.And, term " includes ", " comprise " or its any other variant is intended to comprising of nonexcludability, so that include that one is The process of row key element, method, article or equipment not only include those key elements, but also include the brightest Other key elements really listed, or also include intrinsic for this process, method, article or equipment Key element.In the case of there is no more restriction, statement " including ... " key element limited, It is not precluded from there is also in including the process of described key element, method, article or equipment other identical Key element.
The above is only the detailed description of the invention of the application, it is noted that general for the art For logical technical staff, on the premise of without departing from the application principle, it is also possible to make some improvement and profit Decorations, these improvements and modifications also should be regarded as the protection domain of the application.

Claims (8)

1. a high accuracy number liquidometer, it is characterised in that include housing, this housing has at receiving First space of reason device, the 3rd space formed below in this first space, arrange in described 3rd space Having monocrystalline-silicon pressure transducer, this monocrystalline-silicon pressure transducer is connected to described processor.
High accuracy number liquidometer the most according to claim 1, it is characterised in that: described first is empty Between and the 3rd space between be formed with intercommunicating pore, described monocrystalline-silicon pressure transducer is sealed in described intercommunicating pore.
High accuracy number liquidometer the most according to claim 1, it is characterised in that: described monocrystal silicon Threadedly it is rotatably assorted between edge and the inwall in the 3rd space of pressure transducer.
High accuracy number liquidometer the most according to claim 1, it is characterised in that: described monocrystal silicon Pressure transducer includes substrate and is formed at substrate surface monocrystalline silicon thin film, described monocrystalline silicon thin film and lining Vacuum chamber it is formed with between basal surface.
High accuracy number liquidometer the most according to claim 1, it is characterised in that: the described 3rd is empty Between be airtight cavity.
High accuracy number liquidometer the most according to claim 5, it is characterised in that: on described housing Offering the second opening communicated with described first space, this second opening part is capped with the second lid, institute State the second lid to be removably fixed on described housing.
High accuracy number liquidometer the most according to claim 6, it is characterised in that: described first is empty In be provided with digital display screen, the corresponding described digital display screen position of described second lid is provided with transparent Window.
High accuracy number liquidometer the most according to claim 1, it is characterised in that: described housing Material is aluminium alloy.
CN201610471780.7A 2016-06-25 2016-06-25 High-precision digital liquid level meter Pending CN105928587A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610471780.7A CN105928587A (en) 2016-06-25 2016-06-25 High-precision digital liquid level meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610471780.7A CN105928587A (en) 2016-06-25 2016-06-25 High-precision digital liquid level meter

Publications (1)

Publication Number Publication Date
CN105928587A true CN105928587A (en) 2016-09-07

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Family Applications (1)

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CN201610471780.7A Pending CN105928587A (en) 2016-06-25 2016-06-25 High-precision digital liquid level meter

Country Status (1)

Country Link
CN (1) CN105928587A (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1047420A (en) * 1989-05-18 1990-11-28 清华大学 A kind of monocrystalline-silicon pressure transducer manufacture method and structure thereof
CN203705940U (en) * 2014-03-06 2014-07-09 浙江机电职业技术学院 Environment monitoring apparatus with packaging box
CN204086943U (en) * 2014-07-01 2015-01-07 江汉大学 Harmful influence transport monitor system
CN104931114A (en) * 2015-05-29 2015-09-23 苏州德锐朗智能科技有限公司 Water level detection system with pressure compensation function
CN105004457A (en) * 2015-07-19 2015-10-28 江苏德尔森传感器科技有限公司 Monocrystalline silicon pressure sensor chip capable of improving working performance
CN105044155A (en) * 2015-06-24 2015-11-11 中山欧麦克仪器设备有限公司 Multi-parameter sensor integrating pH, salinity and dissolved oxygen
WO2015173611A1 (en) * 2014-05-16 2015-11-19 Sorin Group Italia S.R.L. Blood reservoir with fluid volume measurement based on pressure sensor
CN205175505U (en) * 2015-11-04 2016-04-20 西安航天自动化股份有限公司 A protection device for entrying formula ship lift underwater penetration measuring transducer
CN205691199U (en) * 2016-06-25 2016-11-16 苏州赛智达智能科技有限公司 High accuracy number liquidometer

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1047420A (en) * 1989-05-18 1990-11-28 清华大学 A kind of monocrystalline-silicon pressure transducer manufacture method and structure thereof
CN203705940U (en) * 2014-03-06 2014-07-09 浙江机电职业技术学院 Environment monitoring apparatus with packaging box
WO2015173611A1 (en) * 2014-05-16 2015-11-19 Sorin Group Italia S.R.L. Blood reservoir with fluid volume measurement based on pressure sensor
CN204086943U (en) * 2014-07-01 2015-01-07 江汉大学 Harmful influence transport monitor system
CN104931114A (en) * 2015-05-29 2015-09-23 苏州德锐朗智能科技有限公司 Water level detection system with pressure compensation function
CN105044155A (en) * 2015-06-24 2015-11-11 中山欧麦克仪器设备有限公司 Multi-parameter sensor integrating pH, salinity and dissolved oxygen
CN105004457A (en) * 2015-07-19 2015-10-28 江苏德尔森传感器科技有限公司 Monocrystalline silicon pressure sensor chip capable of improving working performance
CN205175505U (en) * 2015-11-04 2016-04-20 西安航天自动化股份有限公司 A protection device for entrying formula ship lift underwater penetration measuring transducer
CN205691199U (en) * 2016-06-25 2016-11-16 苏州赛智达智能科技有限公司 High accuracy number liquidometer

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