CN202886318U - Three-wire double-capacitor transducer - Google Patents

Three-wire double-capacitor transducer Download PDF

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Publication number
CN202886318U
CN202886318U CN 201220576669 CN201220576669U CN202886318U CN 202886318 U CN202886318 U CN 202886318U CN 201220576669 CN201220576669 CN 201220576669 CN 201220576669 U CN201220576669 U CN 201220576669U CN 202886318 U CN202886318 U CN 202886318U
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Prior art keywords
support
tube
inner tube
inner
capacitance
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CN 201220576669
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Chinese (zh)
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杨国渝
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成都兰石低温科技有限公司
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Abstract

The utility model belongs to the field of capacitance-process liquid level measurement transducers, and provides a three-wire double-capacitor transducer. The utility model aims to implement automatic calibration and self-adaptation of dielectric constant changes due to different liquid sources in the LBG gas cylinder liquid level measurement process. The transducer comprises an outer tube and two inner tubes arranged in the outer tube, wherein one inner tube and the outer tube form a reference capacitor transducer, and the other inner tube and the outer tube form a measurement capacitor transducer; and a support device for connecting the two inner tubes together in an insulating mode is arranged between the two inner tubes. The utility model is used for liquefied gas liquid level measurement.

Description

一种三线式双电容传感器 A three-wire capacitance sensor bis

技术领域 FIELD

[0001] 本实用新型属于电容法液位测量传感器领域,提供了一种三线式双电容传感器,其易于实现自动校准和自适应介质变化的场合。 [0001] The present invention belongs to the field of Capacitance level measurement sensor, a capacitance sensor dual three-wire, which is easy to achieve automatic calibration and adaptive media case changes. 主要应用于液化天然气气瓶内液面高度的测量,也可应用于低温、真空行业液化气体储罐内的液位测量。 Is mainly used to measure the liquid level in the liquefied natural gas cylinders, can also be used in low temperature, liquid level measurement in the vacuum tank for liquefied gas industry.

背景技术 Background technique

[0002] 根据国际能源发展的方向,适应我国清洁能源的发展战略,液化天然气(LNG)将成为首选的新型燃料,车载LNG气瓶将大面积推广以取代传统的汽油或柴油燃料箱。 [0002] According to the direction of international energy development, adapt to the development strategy of China's clean energy, liquefied natural gas (LNG) will become the first choice of new fuels, LNG gas cylinder car will be large scale to replace conventional gasoline or diesel fuel tank. 与汽车燃料箱类似,LNG气瓶也需要一个液位表指示气瓶内液化气的量。 Similarly automobile fuel tank, LNG cylinders also require a level table indicates the amount of liquefied gas cylinders. 目前用于测量LNG液位的电容式液位计,都是采用的单电容式传感器。 Single capacitive sensor for measuring the current level of LNG capacitive level gauge, is employed. 这种单电容式传感器构成的液位计需要手动进行零刻度和满刻度校准,因而也就预先需要人工测量LNG气瓶的零刻度和满刻度电容值,这给气瓶生产带来极大的不便。 The single level gauge capacitive sensor configured to manually zero and full scale calibration and, therefore, the previously zero scale and full scale LNG cylinders require manual measuring capacitance values, which brings to a great cylinder production inconvenient. 另一方面,实践中发现天然气组成成分与产地密切相关,而这种单电容式传感器不能消除此种由于LNG液源不同带来的测量误差。 On the other hand, the composition of the natural gas found in practice that is closely related to the origin, and this alone can not eliminate the capacitive sensor such measurement error caused due to the difference of an LNG source.

实用新型内容 SUMMARY

[0003] 本实用新型的目的在于为了实现LNG气瓶内液位测量的自动校准和自适应LNG由于液源不同引起的介电常数变化,而提供了一种三线式双电容传感器。 [0003] The object of the present invention to achieve automatic calibration cylinder inner LNG LNG level measurement and adaptive change in dielectric constant caused due to various liquid sources, and there is provided a dual three-wire capacitance sensor.

[0004] 本实用新型为实现上述目的采用以下技术方案: [0004] The present invention to achieve the above purpose the following technical solutions:

[0005] 一种三线式双电容传感器,其特征在于:包括外管,设置外管内的上内管和下内管,所述上内管与外管形成参比电容传感器,下内管与外管形成测量电容传感器,所述上内管和下内管间设置有用于将其绝缘连接在一起的支撑装置。 [0005] A three-line double-capacitance sensor, characterized by: comprising an outer tube disposed tubes and the lower inner tube on the inside of the outer tube, said upper and outer tubes forming a reference capacitive sensor, the lower inner tube and the outer measuring capacitive sensor formed tube, said inner tube and the inner tube is provided between the supporting means for connecting together the insulation.

[0006] 上述方案中,所述支撑装置包括支撑套、支撑筒和支撑环,所述支撑套采用绝缘塑料,支撑套套装在支撑筒外,支持套通过固定在支撑套两端的支撑环固定,支撑筒有效的防止了支持套因为温度变化而收缩产生间隙的问题。 [0006] In the above embodiment, the support means comprises a support sleeve, the support sleeve and the support ring, the support sleeve using an insulating plastic, the outer support sleeve sleeved on the support cylinder, a support ring is fixed by a support sleeve fixed to both ends of the support sleeve, support cylinder effectively prevent the support sleeve is contracted because of a temperature change gap problem.

[0007] 上述方案中,还包括三根同型号等长度同轴电缆,其中两个分别连接参比电容传感器和测量电容传感器的内容,另一根悬空作为参考电缆,测量引线参考电容,用于分离参比电容和测量电容的净变化值,并且消除引线长度变化对测量结果的影响。 [0007] In the above embodiment, further comprising three other models of the same length of the coaxial cable, wherein two capacitors are connected to reference content sensors and measuring a capacitive sensor, the other as a reference floating cable, wire reference capacitance measurement, for separating reference net change of the measurement capacitance ratio, and eliminate the effects of changes in lead length measurement results.

[0008] 上述方案中,所述内管和外管间设置有绝缘支撑座。 [0008] In the above embodiment, the inner support base is provided between the insulating tube and the outer tube.

[0009] 上述方案中,所述2个内管内均设置有连接片,所述连接片连接有芯杆,所述芯杆连接用于引出的同轴电缆。 [0009] In the above embodiment, the connecting piece is provided with the inner tube 2, the connecting plate is connected to the coaxial cable core rod, the core rod is connected to the lead.

[0010] 上述方案中,所述外管、内管两侧设有上固定套和下固定套。 [0010] In the above embodiment, the outer tube is provided on the stationary sleeve and the inner tube sleeve fixed on both sides.

[0011] 本实用新型因为采用以上技术方案,所以具有以下益效果: [0011] Since the present invention adopts the above technical solution, it has the following beneficial effects:

[0012] 一、本实用新型不需要手动进行零刻度和满刻度校准,免除了在LNG气瓶生产中人工测量空瓶电容的麻烦,提高了工作效率。 [0012] First, the present invention does not need to manually zero and full scale calibration, eliminating manual measurement capacitance is empty cylinders LNG production trouble, improve the work efficiency. 由于自动实现液位的零刻度和满刻度校准,并且这种校准在仪器运行中是常态化进行的,使液体介电常数变化与测量结果无关,因此提高了测量精度。 Since the automatic zero and full scale calibration level, and this calibration is performed in the normalization operation of the instrument, the liquid regardless of change in dielectric constant measurement, the measurement accuracy is improved. 用户使用和操作更加简单,有利于推动LNG清洁能源大规模普及和应用。 User-friendly and easier to operate, LNG will help promote the popularization and application of large-scale clean energy. [0013] 二、采用本实用新型作为传感器研制的智能型自适应LNG液位计,配以高效的驱动软件,实现了自动液位的零刻度和满刻度校准和自适应LNG液源的变化。 [0013] Second, the use of the present invention as a sensor developed intelligent adaptive LNG level gauge, coupled with efficient drive software, and the change in the zero scale and full scale automatic level calibration and adaptation of an LNG source. 测量液位误差小于1%,在行车过程中电磁兼容性良好。 Level measurement error is less than 1%, during driving good electromagnetic compatibility.

附图说明 BRIEF DESCRIPTION

[0014] 图1为本实用新型的结构示意图; [0014] Figure 1 is a schematic view of the structure of the new utility;

[0015]1-上固定套、2-焊管、3-十字堵头、4-绝缘支撑、5-外管、6-上内管、7-下固定套、8-限位环、9-三芯同轴电缆、10-定位套、11-支撑套、12-支撑筒、13-支撑环、14-护线套、15-芯杆、16-连接片、17-穿线管、18- Φ 3 X 0. 3四氟管、19-下内管。 [0015] 1- fixed sleeve, 2- pipe, plug cross 3-, 4- insulating support, 5 an outer tube, the inner tube on the 6-, 7- lower fixing sleeve, the stop ring 8-, 9- core coaxial cable, positioning sleeve 10-, 11- support sleeve, 12 the support tube, the support ring 13-, 14- grommet, core rod 15, 16 connected to sheet, pipe threading 17-, 18- Φ 3 X 0. 3 PTFE tube, the inner tube 19-.

具体实施方式 detailed description

[0016] 下面结合附图对本实用新型作进一步具体说明: [0016] DETAILED DESCRIPTION OF DRAWINGS Further the present invention as:

[0017] 本实用新型提供的“液化天然气用三线式双电容传感器”采用两个完全相同结构和尺寸的同轴电容,共轴对称安装在一根轴线上。 [0017] The present invention provides a "three-wire LNG with double capacitance sensor" capacitance two coaxial identical structure and size, is mounted coaxially on an axis of symmetry. 两同轴电容之间间隙小小于整个传感器总长(大约0. 5%),因此该间隙对测量影响很小。 A gap between two coaxial capacitor with a small overall length of the entire sensor (approximately 0.5%), this gap has little effect on the measurement. 当传感器垂直安装时,下面一个同轴电容作为参比电容传感器,上面一个同轴电容作为测量电容传感器。 When the sensor is mounted vertically, coaxially below a reference capacitor as a capacitive sensor, coaxially above a capacitive sensor as the measuring capacitor. 两个同轴电容用两根同型号等长同轴电缆引出,因此,在无液体时,上下两个电容的测量值是完全相同的。 Two capacitors of the same type as long as the coaxial lead with two coaxial cables, and therefore, in the absence of a liquid, the capacitance of the upper and lower two measurements are identical. 为了分离出参比电容和测量电容的净变化值,引入第3根同型号等长同轴电缆,称为参考电缆。 To separate the reference net change in the measurement capacitance ratio, with the introduction of three equal length coaxial type, called the reference cable. 见图示结构,这就构成了三线式双电容传感器。 See the illustrated construction, which constitutes a double three-wire capacitance sensor.

[0018] 本实用新型包括三芯同轴电缆、外管、上内管、下内管、连接部件和接线部件。 [0018] The present invention comprises a three-core coaxial cable, the outer tube, the inner tube, the inner tube, and a connection member connecting member. 外管、上内管和下内管为同轴结构金属管。 Outer tube, inner tube and the tube is a metal tube within the coaxial structure. 连接部件包括上固定套、下固定套、焊管、十字堵头、限位环、定位套、绝缘支撑、支撑套、支撑筒和支撑环。 The connecting member includes an upper fixing sleeve, the lower fixing sleeve, pipe, cross plug, stop ring, positioning sleeve, the insulating support, a support sleeve, the support sleeve and the support ring. 接线部件包括护线套、芯杆、连接片、穿线管和Φ3Χ0.3四氟管。 Junction member comprises grommet, core rod, connecting plate, and a conduit Φ3Χ0.3 PTFE tube.

[0019] 本实用新型外管与上下内管之间构成两个结构和尺寸相同的独立传感器电容,分别称为测量电容传感器和参比电容传感器。 The same configuration and size of two separate structures sensor capacitance between [0019] the present invention and down the inner tube and the outer tube, called the reference measurement and the capacitive sensor capacitive sensor. 2.三根同型号等长度同轴电缆中的两根实现测量电容和参比电容的引出,另一根作为参考电缆,测量引线参考电容,用于分离参比电容和测量电容的净变化值,并且消除引线长度变化对测量结果的影响。 2. The other three of the same model of coaxial cable length to achieve two measuring capacitance and the reference capacitance than lead, the other cable as a reference, the reference capacitance measurement leads, for separating net change ratio of the reference capacitance and the measured capacitance, and eliminating the effect of trace length variation on the measurement results.

[0020] 在采用该实用新型发明作为传感器制作的LNG液位计工作时,由于测量电容传感器和参比电容传感器完全对称的结构形式,以及参考电缆的作用,液位计可以非常容易地通过一个液位变化的学习过程,自动实现液位的零刻度和满刻度校准。 [0020] When using LNG working level gauge as a sensor of the invention, the invention made, due to the capacitive measuring sensor and the reference sensor capacitance than completely symmetrical structure, and reference cables level gauge can be very easily through a changes in the level of the learning process, automatic level to achieve zero-scale and full-scale calibration. 这个校准过程完成后,测量结果会与液体介质的介电常数无关,消除了LNG液源变化对测量结果的影响。 After the calibration process is completed, regardless of the measurement results of the dielectric constant of the liquid medium, the influence of variation of an LNG source on the measurement results.

Claims (6)

  1. 1. 一种三线式双电容传感器,其特征在于:包括外管,设置外管内的上内管和下内管, 所述上内管与外管形成参比电容传感器,下内管与外管形成测量电容传感器,所述上内管和下内管间设置有用于将其绝缘连接在一起的支撑装置。 A double three-wire capacitance sensor, characterized by: comprising an outer tube disposed within the outer tube on the inner tube and the inner tube, the upper inner and outer tubes forming a reference capacitive sensor, the inner and outer pipes measuring the capacitance sensor is formed, the inner tube and the inner tube is provided between the supporting means for connecting together the insulation.
  2. 2.根据权利要求1所述的一种自适应传感器,其特征在于:还包括三根同型号等长度的同轴电缆,其中两个分别连接参比电容传感器和测量电容传感器的内容,另一根悬空作为参考电缆。 An adaptive sensor according to claim 1, characterized in that: further comprising a coaxial cable with a length of three model, etc., which are connected to two reference capacitance sensor and measuring the content of a capacitive sensor, the other dangling reference cable.
  3. 3.根据权利要求1所述的一种三线式双电容传感器,其特征在于:所述支撑装置包括支撑套、支撑筒和支撑环,所述支撑套采用绝缘塑料,支撑套套装在支撑筒外,支持套通过固定在支撑套两端的支撑环固定。 The dual capacitor a three-wire sensor according to claim 1, wherein: said support means comprises a support sleeve, the support sleeve and the support ring, the support sleeve using an insulating plastic, support sleeve sleeved outside the support tube support collar secured by a support fixed to both ends of the brace.
  4. 4.根据权利要求1所述的一种三线式双电容传感器,其特征在于:所述内管和外管间设置有绝缘支撑座。 The dual capacitor a three-wire sensor according to claim 1, further comprising: an insulating support base is provided between the inner tube and the outer tube.
  5. 5.根据权利要求1所述的一种三线式双电容传感器,其特征在于:所述2个内管内均设置有连接片,所述连接片连接有芯杆,所述芯杆连接用于引出的同轴电缆。 5. A three-line double capacitance sensor according to claim 1, wherein: the inner tube 2 is provided with a connecting piece, the connecting piece is connected with the core rod, the core rod is connected to the lead the coaxial cable.
  6. 6.根据权利要求1所述的一种三线式双电容传感器,其特征在于:所述外管、内管两侧设有上固定套和下固定套。 The capacitance of a three-wire sensor according bis claim 1, wherein: said outer tube is provided on the stationary sleeve and the inner tube sleeve fixed on both sides.
CN 201220576669 2012-11-05 2012-11-05 Three-wire double-capacitor transducer CN202886318U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103197155A (en) * 2013-04-18 2013-07-10 苏州赛智达智能科技有限公司 Method for measuring fully loaded capacitance in LNG (Liquefied Natural Gas) liquid level detector
CN103196037A (en) * 2013-04-18 2013-07-10 苏州赛智达智能科技有限公司 Internally integral primary-secondary capacitance type sensor
CN103234597A (en) * 2013-04-18 2013-08-07 苏州赛智达智能科技有限公司 Side-structured primary and secondary capacitance-type sensor
CN103353324A (en) * 2013-06-05 2013-10-16 王云平 Self-calibrated capacitive liquid level sensor
CN103727995A (en) * 2013-12-20 2014-04-16 江南工业集团有限公司 Self-calibration liquid level sensor

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103197155A (en) * 2013-04-18 2013-07-10 苏州赛智达智能科技有限公司 Method for measuring fully loaded capacitance in LNG (Liquefied Natural Gas) liquid level detector
CN103196037A (en) * 2013-04-18 2013-07-10 苏州赛智达智能科技有限公司 Internally integral primary-secondary capacitance type sensor
CN103234597A (en) * 2013-04-18 2013-08-07 苏州赛智达智能科技有限公司 Side-structured primary and secondary capacitance-type sensor
CN103196037B (en) * 2013-04-18 2015-04-08 苏州赛智达智能科技有限公司 Internally integral primary-secondary capacitance type sensor
CN103197155B (en) * 2013-04-18 2015-10-28 苏州赛智达智能科技有限公司 Lng method of detecting full level detector capacitance
CN103353324A (en) * 2013-06-05 2013-10-16 王云平 Self-calibrated capacitive liquid level sensor
CN103353324B (en) * 2013-06-05 2016-10-05 王云平 A capacitive level sensor self-calibration
CN103727995A (en) * 2013-12-20 2014-04-16 江南工业集团有限公司 Self-calibration liquid level sensor
CN103727995B (en) * 2013-12-20 2017-01-04 江南工业集团有限公司 Self-calibration level sensor

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