CN205373816U - On -vehicle LNG takes inclination liquid level measurement compensation arrangement - Google Patents

On -vehicle LNG takes inclination liquid level measurement compensation arrangement Download PDF

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Publication number
CN205373816U
CN205373816U CN201521091335.5U CN201521091335U CN205373816U CN 205373816 U CN205373816 U CN 205373816U CN 201521091335 U CN201521091335 U CN 201521091335U CN 205373816 U CN205373816 U CN 205373816U
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CN
China
Prior art keywords
pin
circuit
liquid level
electric capacity
angle
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.)
Expired - Fee Related
Application number
CN201521091335.5U
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Chinese (zh)
Inventor
吴慎将
徐欢
吴斌
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.)
XI'AN GAUSS LASER TECHNOLOGY Co Ltd
Original Assignee
XI'AN GAUSS LASER TECHNOLOGY Co Ltd
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Publication date
Application filed by XI'AN GAUSS LASER TECHNOLOGY Co Ltd filed Critical XI'AN GAUSS LASER TECHNOLOGY Co Ltd
Priority to CN201521091335.5U priority Critical patent/CN205373816U/en
Application granted granted Critical
Publication of CN205373816U publication Critical patent/CN205373816U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses an on -vehicle LNG takes inclination liquid level measurement compensation arrangement, including cylindrical horizontal LNG fuel cell 1, capacitive sensor 2, changer module 3 and display instrument 4, wherein, changer module 3 contains inclination measuring circuit, capacitance measurement circuit, CAN bus transceiver circuits and control circuit, wherein, the inclination measuring circuit includes triaxial acceleration sensor ADXL345 integrated circuit module, electric capacity no. 1 and electric capacity no. 2, control circuit adds and to take inclination liquid level algorithm, and the liquid level height error who arouses the liquid level inclination compensates, obtains real liquid level height and sends and show for display instrument. The utility model discloses circuit structure is simple, the algorithm is easily understood, and it can only to need to add the inclination measuring circuit and measure the algorithm in original changer.

Description

A kind of vehicle-mounted LNG level gauging compensation device with angle
Technical field
This utility model belongs to a kind of measurement apparatus, is a kind of measurement apparatus for accurately measuring LNG liquid level more precisely.
Background technology
LNG is a kind of cleaning, efficient novel energy, is mainly used on city bus, environmental sanitation vehicles, taxi, intercity big bus, these vehicles of heavy truck.Currently used level measuring method carries out growing upward slope or long descending time error is bigger at vehicle, main cause is liquid level goes up a slope or during long descending relative to capacitance type sensor run-off the straight long, causing that liquid level gauging is forbidden, this utility model aims to solve the problem that this engineering problem.
Summary of the invention
The purpose of this utility model is to improve vehicle-mounted LNG liquid level measurement precision, it is provided that a kind of vehicle-mounted LNG level gauging compensation device with angle.
The purpose of this utility model may be accomplished by: this utility model provides a kind of vehicle-mounted LNG level gauging compensation device with angle, it is characterized in that: include cylindrical horizontal LNG fuel tank, capacitance type sensor, transmitter module, wherein, described capacitance type sensor stands on cylindrical horizontal LNG fuel tank interior circle tangent plane center, described capacitance type sensor is connected to the transmitter of fuel tank horizontal positioned, wherein, described transmitter module comprises measurement of dip angle circuit, capacitance measurement circuit, CAN transmission circuit and control circuit.Wherein said measurement of dip angle circuit includes 3-axis acceleration sensor ADXL345 integrated circuit modules, electric capacity one and electric capacity two, a wherein termination 3.3V power supply of the pin one of ADXL345 integrated circuit, one end of electric capacity one, electric capacity two, the pin two of ADXL345 integrated circuit, pin four, pin five, the other end of electric capacity one, electric capacity two other end ground connection, the pin eight of ADXL345 integrated circuit, pin nine, pin 12, pin 13, pin 14 connect control circuit, and other pins of ADXL345 integrated circuit do not connect.It is as follows that this utility model realizes principle: capacitance type sensor stands on the centre of cylindrical horizontal LNG fuel tank front and back position, when liquid level changes, liquid level information is converted into capacitance information by sensor, capacitance measurement circuit in transmitter module measures capacitance signal now, draw the elevation information of correspondence, measurement of dip angle circuit measures the change of pitch angle of now fuel tank simultaneously, draws the level value closer to true value according to Liquid level compensator algorithm with angle.
As preferably, described measurement of dip angle circuit place plane need to keep level or fixed angle with liquid level.
As preferably, described control circuit adopts STM32 controller.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1: vehicle-mounted LNG fuel tank liquid level emasuring device structural representation;
Fig. 2: measurement of dip angle circuit diagram.
Fig. 3: vehicle-mounted LNG level gauging backoff algorithm schematic diagram with angle;
Detailed description of the invention
For the technological means making this utility model realize, creation characteristic, reach purpose and effect and be easy to understand, below in conjunction with being specifically illustrating, this utility model is expanded on further.
As shown in Figure 1: this utility model is a kind of vehicle-mounted LNG level gauging compensation method with angle, including cylindrical horizontal LNG fuel tank 1, capacitance type sensor 2, transmitter module 3 and display instrument 4, horizontal LNG fuel tank 1 accumbency of described cylinder is on automobile, capacitance type sensor 2 stands in the middle of cylindrical horizontal LNG fuel tank 1 circle tangent plane, capacitance type sensor 2 is connected to transmitter module 3, and transmitter module 3 calculating obtains level value and is sent to display instrument 4 by bus.In transmitter module 3 measurement of dip angle circuit place plane need to parallel with liquid level or become fixed angle, present embodiment selects parallel.
As shown in Figure 2: described measurement of dip angle circuit includes 3-axis acceleration sensor ADXL345 integrated circuit modules, electric capacity one and electric capacity two, the wherein pin one of ADXL345 integrated circuit U1, one end of electric capacity one C1, the one termination 3.3V power supply of electric capacity two C2, the pin two of ADXL345 integrated circuit U1, pin four, pin five, the other end of electric capacity one C1, the other end ground connection of electric capacity two C2, the pin eight of ADXL345 integrated circuit U1, pin nine, pin 12, pin 13, pin 14 connects control circuit, other pins of ADXL345 integrated circuit U1 do not connect.Control circuit reads the ADXL345 integrated circuit U1 3-axis acceleration information recorded by bus, calculates and obtains and horizontal plane and liquid level angle α.
As shown in Figure 3: for vehicle-mounted LNG level gauging backoff algorithm schematic diagram with angle, assume that liquid level is more than fuel tank radius, and be up-hill journey, in figure, radius is R great circle 5 is cylindrical horizontal LNG fuel tank cross section, radius is the roundlet 6 of r is the auxiliary circle tangent for the center of circle and liquid level straight dotted line 9 with the great circle R center of circle, straight line 7 represents the position of capacitance type sensor during vehicle level road traveling, h represents the liquid level now recorded, straight dotted line 8 is automobile position of capacitance type sensor when the gradient is go up a slope continuously on α ramp, and H represents the liquid level now recorded.The compensation of liquid level with angle just can be equivalent to the known liquid level H with angle that records, cylindrical horizontal LNG fuel tank radius R and ramp inclination alpha, seek liquid level true altitude h.
As seen from Figure 3:
(1)
(2)
In triangle OAB:
(3)
Obtained by formula (1) (2) (3) simultaneous
(4)
Record height H in conjunction with capacitance sensor, utilize formula (4) to can be obtained by closer to real liquid level h in the controller, when automobile downhill traveling or liquid level are identical lower than fuel tank Radius algorithm.
Of the present utility model ultimate principle and principal character and of the present utility model advantage have more than been shown and described.Skilled person will appreciate that of the industry; this utility model is not restricted to the described embodiments; described in above-described embodiment and description is that principle of the present utility model is described; under the premise without departing from this utility model spirit and scope; this utility model also has various changes and modifications, and these changes and improvements both fall within the scope of claimed this utility model.This utility model claims scope and is defined by appending claims and equivalent thereof.

Claims (4)

1. a vehicle-mounted LNG level gauging compensation device with angle, it is characterized in that: include cylindrical horizontal LNG fuel tank, capacitance type sensor, transmitter module, wherein, described capacitance type sensor stands on cylindrical horizontal LNG fuel tank interior circle tangent plane center, described capacitance type sensor is connected to the transmitter of fuel tank horizontal positioned, wherein, described transmitter module comprises measurement of dip angle circuit, capacitance measurement circuit, CAN transmission circuit and control circuit.
2. a kind of vehicle-mounted LNG level gauging compensation device with angle according to claim 1, it is characterized in that measurement of dip angle circuit includes 3-axis acceleration sensor ADXL345 integrated circuit modules, electric capacity one and electric capacity two, the wherein pin one of ADXL345 integrated circuit, one end of electric capacity one, one termination 3.3V power supply of electric capacity two, the pin two of ADXL345 integrated circuit, pin four, pin five, the other end of electric capacity one, the other end ground connection of electric capacity two, the pin eight of ADXL345 integrated circuit, pin nine, pin 12, pin 13, pin 14 connects control circuit, other pins of ADXL345 integrated circuit do not connect.
3. the vehicle-mounted LNG of one according to claim 1 level gauging compensation device with angle, it is characterised in that: described measurement of dip angle circuit place plane need to keep level or fixed angle with liquid level.
4. the vehicle-mounted LNG of one according to claim 1 level gauging compensation device with angle, it is characterised in that: described control circuit adopts STM32 controller.
CN201521091335.5U 2015-12-25 2015-12-25 On -vehicle LNG takes inclination liquid level measurement compensation arrangement Expired - Fee Related CN205373816U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201521091335.5U CN205373816U (en) 2015-12-25 2015-12-25 On -vehicle LNG takes inclination liquid level measurement compensation arrangement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201521091335.5U CN205373816U (en) 2015-12-25 2015-12-25 On -vehicle LNG takes inclination liquid level measurement compensation arrangement

Publications (1)

Publication Number Publication Date
CN205373816U true CN205373816U (en) 2016-07-06

Family

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CN201521091335.5U Expired - Fee Related CN205373816U (en) 2015-12-25 2015-12-25 On -vehicle LNG takes inclination liquid level measurement compensation arrangement

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10082416B1 (en) 2017-04-20 2018-09-25 Rochester Gauges, Inc. Liquid level gauge with integral electronic display
US10684157B2 (en) 2017-04-20 2020-06-16 Rochester Gauges, Inc. Liquid level gauge with integral electronic display

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10082416B1 (en) 2017-04-20 2018-09-25 Rochester Gauges, Inc. Liquid level gauge with integral electronic display
US10684157B2 (en) 2017-04-20 2020-06-16 Rochester Gauges, Inc. Liquid level gauge with integral electronic display

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GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20160706

Termination date: 20161225

CF01 Termination of patent right due to non-payment of annual fee