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WO2005119188A1 - Appareil et procede permettant de determiner la charge d'un vehicule - Google Patents

Appareil et procede permettant de determiner la charge d'un vehicule Download PDF

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Publication number
WO2005119188A1
WO2005119188A1 PCT/IB2005/000499 IB2005000499W WO2005119188A1 WO 2005119188 A1 WO2005119188 A1 WO 2005119188A1 IB 2005000499 W IB2005000499 W IB 2005000499W WO 2005119188 A1 WO2005119188 A1 WO 2005119188A1
Authority
WO
WIPO (PCT)
Prior art keywords
vehicle
transducer
load
cable
orientation
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.)
Ceased
Application number
PCT/IB2005/000499
Other languages
English (en)
Inventor
Jan Hendrik Henning
Dennis Glen Scheepers
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO2005119188A1 publication Critical patent/WO2005119188A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G23/00—Auxiliary devices for weighing apparatus
    • G01G23/002—Means for correcting for obliquity of mounting
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
    • G01G19/02—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles
    • G01G19/07—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles for weighing aircraft
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
    • G01G19/08—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for incorporation in vehicles
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G23/00—Auxiliary devices for weighing apparatus
    • G01G23/18—Indicating devices, e.g. for remote indication; Recording devices; Scales, e.g. graduated
    • G01G23/36—Indicating the weight by electrical means, e.g. using photoelectric cells
    • G01G23/37—Indicating the weight by electrical means, e.g. using photoelectric cells involving digital counting
    • G01G23/3728—Indicating the weight by electrical means, e.g. using photoelectric cells involving digital counting with wireless means
    • G01G23/3735—Indicating the weight by electrical means, e.g. using photoelectric cells involving digital counting with wireless means using a digital network
    • G01G23/3742—Indicating the weight by electrical means, e.g. using photoelectric cells involving digital counting with wireless means using a digital network using a mobile telephone network

Definitions

  • THIS INVENTION relates to the monitoring of loads on a vehicle such as a land vehicle or aircraft, while the vehicle is stationery, to prevent overloading.
  • the invention relates to apparatus and a method for determining the load of a vehicle.
  • the overloading of vehicles can cause damage and/or wear to vehicles and the surfaces on which vehicles travel, but even more alarmingly, it can substantially decrease the safety of operation of the vehicles. This problem is particularly acute in the case of road vehicles, which are difficult to handle and to brake when overloaded, and aircraft, which may be too heavily laden to take off.
  • apparatus for determining the load of a vehicle that includes at least one wheel connected to the vehicle's body by a suspension arrangement in which the distance between the vehicle body and a wheel assembly including the wheel, decreases with an increase in the vehicle's load
  • said apparatus including: at least one transducer configured to measure the distance between the vehicles body and one of the wheel assemblies; an orientation sensor, configured to monitor the orientation of the vehicle; and processing means, configured to calculate the vehicle's load from the distance measured in each transducer, and to compare the vehicle's orientation with predetermined requirements.
  • the term “vehicle” includes a conveyance for transporting people, goods, etc., including aircraft, road vehicles, rail vehicles, and the like.
  • vehicle body includes a vehicle's body shell or fuselage and/or a vehicles chassis, frame, or the like.
  • the apparatus may include positioning means, configured to determine the position of the vehicle with the aid of a positioning system such as GPS, satellite tracking, triangulation between cellular telephone base stations, etc.
  • the apparatus may include a transmitter for transmitting data from the processor to a remote device.
  • the orientation sensor may include at least one tilt sensor, configured to determine if the vehicle body is tilted beyond a predetermined degree about one axis, and the apparatus may include more than one tilt sensor, each configured to determine if the vehicle's body is tilted beyond a predetermined degree about an axis, specific to the tilt sensor.
  • Each tilt sensor may be a tilt switch or an incline sensor.
  • At least one transducer may be mounted on the vehicle body and the apparatus may include: an elongate tensile element connected to the transducer and passing in the proximity of one of the wheel assemblies; and drawing means, connected to the tensile element at a position spaced from the transducer, and being configured to draw the tensile element into an operational position in which the tensile element exerts a tensile force on the transducer, the tensile force corresponding to the distance between the wheel assembly and the transducer.
  • the transducer may be a cable transducer and the tensile element may be a cable extending from the wheel assembly, connected to the cable of the transducer.
  • the cable may pass slidingly through a guide mounted on the wheel assembly such as a guide mounted on an axle housing of the wheel assembly.
  • the drawing means may include a component of a park brake mechanism of the vehicle such as a park brake lever that is connected to the cable to draw it into its operational position when the park brake is applied.
  • the cable may be connected to the drawing means via biasing means such as a spring and a stopper may be fixedly attached to the cable between the wheel assembly and the drawing means, so that the stopper engages an object, fixedly attached to the vehicle body, when the cable is in its operational condition. If the drawing means applies a further drawing force to the cable, the spring is extended to absorb the force, but the cable remains in its operational position.
  • biasing means such as a spring
  • a stopper may be fixedly attached to the cable between the wheel assembly and the drawing means, so that the stopper engages an object, fixedly attached to the vehicle body, when the cable is in its operational condition.
  • a method of determining the load of a vehicle that includes at least one wheel connected to the vehicle's body by a suspension arrangement in which the distance between the vehicle body and a wheel assembly including the wheel, decreases with an increase in the vehicle's load, said method including: measuring the distance between at least one wheel assembly and the vehicle's body, corresponding to the vehicle's load; generating a load signal in a transducer, corresponding to the measured distance; calculating the vehicle's load from the load signal; monitoring the orientation of the vehicle; generating orientation data corresponding to whether or not the orientation of the vehicle meets predetermined requirements; and providing an output which includes the vehicle load and the orientation data.
  • the method may include tracking the position of the vehicle, e.g. via GPS, satellite tracking, triangulation between cellular telephone base stations, or the like, and may include transmitting an output signal, e.g. via a telephone network, by radio signals, via satellite, or the like, including data relating to the load signal and the orientation data.
  • the output signal may include data relating to the position of the vehicle.
  • the method may include receiving the output signal in a remote device such as a handheld device, a remote computer, mobile telephone, or the like, and may include monitoring movement of the vehicle.
  • the method may include measuring the distance between the vehicle's body and one of the wheel assemblies, by: drawing an elongate tensile element into an operational position when the vehicle is stationery, said tensile element passing in the proximity of the wheel assembly; and exerting a tensile force from the tensile element to a transducer, mounted to the vehicle body, the tensile force corresponding to the distance between the wheel assembly and the transducer.
  • the transducer may be a cable transducer and the step of applying the tensile force includes pulling an elongate element such as a cable of the transducer.
  • the method may include relieving tension from the tensile element and relieving the force exerted on the transducer, after the vehicle load has been determined.
  • the step of drawing the elongate element into its operational position and relieving the tension from the elongate element may include operating the brake mechanism of the vehicle e.g. operating its park brake lever.
  • Figure 1 shows a side elevational view of a vehicle including apparatus in accordance with the invention, for determining the load of the vehicle
  • Figure 2 shows a detail diagrammatic view one embodiment of a transducer arrangement of the apparatus of Figure 1
  • Figure 3 shows a schematic view of the apparatus in accordance with the invention
  • Figure 4 shows a three-dimensional schematic view of an orientation sensor of the apparatus of Figure 1.
  • apparatus for determining the load of a vehicle is generally indicated by reference numeral 10, and a vehicle on which the apparatus has been installed, is indicated generally by reference numeral 12.
  • a vehicle 12 in the form of a truck comprising a mechanical horse 14 and trailer 16, connected by a so-called fifth wheel arrangement 18.
  • the vehicle 12 includes a number of wheels 20, each connected to the vehicle's body by a conventional suspension arrangement (not shown) in which the distance between the vehicle body and a wheel assembly, decreases with an increase in the vehicle's load.
  • a transducer arrangement 46 can be installed on one or more of the assemblies associated with one or more of the wheels 20, but in Figure 1 , it is shown installed on all the wheel assemblies of the mechanical horse 14 and of the trailer 16.
  • a road vehicle 12 in the form of a truck is shown.
  • the invention has application in any type of vehicle which includes a suspension arrangement extending between the vehicle's body and a wheel assembly.
  • the invention has particular further application in aircraft, and rail vehicles.
  • transducer arrangement 46 is shown in detail, extending between a chassis 22 of the vehicle body, and an axle housing 24, forming part of the wheel assembly.
  • the axle housing 24 is connected to the chassis 22 by the suspension arrangement as described hereinabove and accordingly the distance between the axle housing and the chassis corresponds to the load of the vehicle that is borne by the wheel assembly.
  • the transducer arrangement 46 includes a position transducer or cable transducer 26 mounted on the chassis 22 and including a housing 28 from which a transducer cable 30 extends.
  • the transducer 26 is configured to emit an electronic load signal, corresponding to the distance by which the transducer cable 30 protrudes from the housing 28 and the transducer cable is stored inside the housing on a drum, that is spring loaded to recoil automatically.
  • the transducer arrangement 46 further includes an elongate tensile element in the form of a cable 32 that is connected at its one end to the transducer cable 30 and extends slidingly across the end of a protuberance 34 extending from the chassis 22, through a moving cable guide 36 mounted on the axle housing 24, and through a stationery cable guide 38, mounted on the chassis 22.
  • the other end of the cable 32 is connected to biasing means in the form of an extension coil spring 40 that is connected to a park brake lever 42 of the vehicle 12.
  • the cable 32 can slide across the end of the protuberance 34 and can slide inside the cable guides 36,38.
  • a stopper 44 is fixedly attached to the cable 32 between the moving cable guide 36 and stationery cable guide 38, which can engage the end of the stationery cable guide 38.
  • the transducer arrangements 46 include any one of a wide variety of transducers 26, configured to measure the distance between the chassis 22 and the housing 24 or other part of the wheel assembly.
  • the transducer 26 can for instance be a cable transducer with its cable 30 connected directly to the housing 24, so that it remains in use continuously.
  • a transducer 26 in the form of a rheostat, a proximity sensor, or the like can be used to measure the distance between the chassis 22 and the housing 24, and transmit a load signal to the processor 50.
  • the transducers 26 mounted on the trailer 16 can be driven by a battery (not shown) of the trailer and can be connected to an output device in the form of a digital screen (not shown) mounted on the trailer.
  • the battery can be charged automatically when the trailer 16 is connected to the mechanical horse 14, so that the transducers 26 installed on the trailer can operate independently, even in the absence of the mechanical horse 14.
  • the transducers 26 mounted on the mechanical horse 14 are powered by the battery 48 of the mechanical horse and are connected to a processor 50 including an output screen 52 mounted in the cab 54 of the mechanical horse.
  • the transducers 26 mounted on the trailer 16 are connected via a hitch socket 84 to the processor 50 and are powered by the battery 48 of the mechanical horse 14.
  • the apparatus 10 includes a number of transducer arrangements 46 (of which only one example is shown), as well as an orientation sensor 56 mounted on the chassis 22. Outputs from the transducers 26 and the orientation sensor 56 are connected to the processor 50, which includes the output screen 52 and which is powered by the battery 48 of the mechanical horse 14.
  • the apparatus 10 includes positioning means in that the processor 50 is configured to determine the position of the vehicle 12 with the aid of the global positioning system (GPS), represented in Figure 3 of the drawings by a satellite 58. Instead, the processor 50 can be configured to determine the position of the vehicle through two-way communications in a satellite tracking system, through triangulation between cellular telephone base stations, through stationery control points, or the like.
  • GPS global positioning system
  • the processor 50 includes an antenna and transmitter 60 and is configured to transmit output signals 62 from the antenna, that are receivable in remote devices such as a handheld reader 64, a remote computer 66, a cellular telephone, or the like.
  • the output signals 62 can be in the form of radio signals or the like and can be receivable directly in the reader 64, or can be communicated through a communications network, such as a telephone network or a cellular telephone network (represented in Figure 3 of the drawing by a cellular telephone base station tower 68).
  • the motion sensor 56 include four tilt sensors in the form of tilt switches 70, but could instead include four incline sensors.
  • Each tilt switch 70 is oriented on a tilted axis 72, relative to axes 74 that correspond to the orientation of the trailer 16.
  • Each tilt switch 70 is in the form of a mercury switch and includes a hollow, cylindrical glass bulb 76 that houses two electrical probes 78, and houses a mercury droplet 80.
  • the probes 78 are oriented at an end of each bulb 76 that is slightly higher than the rest of the bulb, when the trailer 16 is in a perfectly upright condition, i.e. when the axes 74 are horizontal.
  • the mercury droplet 80 is urged under gravity towards the opposite end of each bulb 76, i.e. away from the probes 78.
  • the orientation sensor 56 is configured with one probe 78 of each tilt switch 70 connected together and with the other probe of each tilt switch connected together and to an output conductor.
  • the orientation sensor 56 thus include two output conductors 82, one connected to one probe 78 of each tilt switch 70, and the other connected to the other probe 78 of each tilt switch.
  • the output conductors 82 are electrically isolated from each other if the trailer 16 is in its upright position, and are electrically connected via at least one of the mercury droplets 80, when the trailer has tilted sufficiently for the droplet to contact its probes 78. If the vehicle 12 is in motion, the orientation sensor 56 will be accelerated and decelerated together with the vehicle body and will vibrate. These movements will cause the mercury droplets 80 to contact the probes 78 from time to time. The output conductors 82 will thus only be electrically isolated from each other if the trailer 16 is upright and is stationery.
  • the transducer arrangements 46 are brought into operation by operating the park brake lever 42 to engage the park brake of the vehicle.
  • the park brake lever 42 exerts a drawing force on the spring 40, which transfers the drawing force to the cable 32, which slides in the cable guides 36,38 until the stopper 44 engages the end of the stationery cable guide 38.
  • the cable 32 is now in its operational position. If the park brake lever 42 is operated further, the drawing force extends the spring 40, but the cable 32 remains in its operating position.
  • the length of the cable 32 extending between the stopper 44 and the end of the protuberance 34 will depend on the position of the axle housing 24 and moving cable guide 36, relative to the chassis 22, which in turn depends on the load of the vehicle.
  • the length of the cable 32 extending between the transducer cable 30 and the end of the protuberance 34 will thus also vary depending on the load of the vehicle 12, and will exert a tensile force on the transducer cable to draw a length of the transducer cable from the transducer housing 28, corresponding to the vehicle's load.
  • the transducer 26 generates a load signal, corresponding to the length of the transducer cable 30 that has been drawn out of the housing 28 and the signal is transmitted to the processor 50.
  • the apparatus 10 When the vehicle 12 is to be used, the apparatus 10 is deactivated by releasing the park brake lever 42, which relieves the tension on the cable 32, so that the stopper 44 moves away from the stationery cable guide 38, the cable passes in a slack condition through the moving cable guide 36 and the tensile load is taken off the transducer cable 30, which is wound into the transducer housing 28. If the vehicle 12 is driven and the axle housing 24 moves relative to the chassis 22 as a result of motion of the vehicle, the slack condition of the cable 32 prevents tensile loads from being exerted on the transducer cable 30, so that the transducer 26 is not used or worn excessively.
  • the transducer 26 can be in the form of a cable transducer with its cable 30 attached directly to the housing 20, or could be another form of transducer, generating a load signal corresponding to the distance between the chassis 22 and the housing 24, which in turn corresponds to the per axle payload borne by the particular wheel arrangement.
  • Data relating to the orientation of the vehicle 12 and particularly of the trailer 16 is generated by the orientation sensor 56 in the form of electric isolation between the output conductors 82 if the trailer is upright and stationery, continuous electrical connection between the output conductors if the trailer is tilted by more than a predetermined angle, and/or intermittent electrical connection between the output conductors if the trailer is in motion.
  • the load signals from all the transducers 26, as well as the orientation sensor 56 are received in the processor 50, which is configured to calculate the load carried by the vehicle from the load signals and which can interpret the orientation signal to ascertain whether or not the vehicle 12 is stationery and level. Further, the processor 50 collects position data of the vehicle 12 with the aid of the GPS system 58, or another tracking system. The processor combines the calculated load of the vehicle, data relating to the orientation of the vehicle and its movement, as well as the data relating to the position of the vehicle, into an output which is displayed on the screen 52 and can be transmitted from the antenna 60 in the form of the output signal 62.
  • Users can thus continually track the load condition and the position of the vehicle 12, on a remote computer 66 and can asses the accuracy of the measured load, from the orientation of the vehicle.
  • data relating to the load and orientation of the vehicle can intermittently be obtained, using the reader 64.
  • the invention illustrated holds the advantage that it allows for determining the load of the vehicle 12 with ease, while being able to assess the accuracy of the load measurement, through checking the orientation and/or movement of the vehicle, with the aid of the orientation sensor 56.
  • the invention illustrated allows the load conditions of the vehicle 12 to be monitored continually, thereby to ensure optimum usage of the vehicle, reduce losses, etc.
  • the transducer arrangement 46 illustrated holds the advantage of preventing wear on the transducer 26, when the vehicle is moving. It holds the further advantages of low cost and simplicity of manufacture, construction and operation.
  • the invention holds the further advantage that cable transducers 26 are widely used in aircraft, with the result that special approval need not be obtained to rate cable transducers for use in the apparatus 10 on an aircraft.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

La présente invention se rapporte à un appareil (10) et à un procédé permettant de déterminer la charge d'un véhicule (12). Le procédé selon l'invention consiste à mesurer la distance séparant les logements des axes de roues (24) et le châssis (22) du véhicule à l'aide de transducteurs (26), et à calculer la charge à partir de ladite distance. En outre, l'orientation du véhicule (12) est contrôlée à l'aide d'un capteur d'orientation (56), qui contrôle la précision de la charge calculée. La position du véhicule est déterminée par le biais d'un système de suivi (58), et les données liées à la charge, à l'orientation et à la position sont affichées sur le véhicule et transmises afin d'être contrôlées à distance.
PCT/IB2005/000499 2004-06-03 2005-02-28 Appareil et procede permettant de determiner la charge d'un vehicule Ceased WO2005119188A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA2004/4381 2004-06-03
ZA200404381 2004-06-03

Publications (1)

Publication Number Publication Date
WO2005119188A1 true WO2005119188A1 (fr) 2005-12-15

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ID=34960848

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2005/000499 Ceased WO2005119188A1 (fr) 2004-06-03 2005-02-28 Appareil et procede permettant de determiner la charge d'un vehicule

Country Status (1)

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WO (1) WO2005119188A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010136745A1 (fr) * 2009-05-29 2010-12-02 Weight Angel Limited Système de détection de charge pour véhicule
EP2962550A1 (fr) * 2014-07-03 2016-01-06 John Deere Forestry Oy Dispositif de transport comprenant un capteur de déformation

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5161628A (en) * 1989-05-09 1992-11-10 Wirth Gallo Messtechnik Ag Axle spring balance
US5376760A (en) * 1993-04-26 1994-12-27 Horsley; Charles L. Truck load indicator apparatus
DE29521150U1 (de) * 1995-08-22 1996-10-10 Philips Patentverwaltung GmbH, 22335 Hamburg Wägevorrichtung für ein Fahrzeug
US6150617A (en) * 1995-09-09 2000-11-21 Agco Limited Vehicle with weight sensing
DE10014877A1 (de) * 2000-03-24 2001-09-27 Volkswagen Ag Beladungsanzeige für einen Pkw-Anhänger
US6378276B1 (en) * 1999-02-17 2002-04-30 Lely Welger Maschinenfabrik Gmbh Baler with a weighing device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5161628A (en) * 1989-05-09 1992-11-10 Wirth Gallo Messtechnik Ag Axle spring balance
US5376760A (en) * 1993-04-26 1994-12-27 Horsley; Charles L. Truck load indicator apparatus
DE29521150U1 (de) * 1995-08-22 1996-10-10 Philips Patentverwaltung GmbH, 22335 Hamburg Wägevorrichtung für ein Fahrzeug
US6150617A (en) * 1995-09-09 2000-11-21 Agco Limited Vehicle with weight sensing
US6378276B1 (en) * 1999-02-17 2002-04-30 Lely Welger Maschinenfabrik Gmbh Baler with a weighing device
DE10014877A1 (de) * 2000-03-24 2001-09-27 Volkswagen Ag Beladungsanzeige für einen Pkw-Anhänger

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010136745A1 (fr) * 2009-05-29 2010-12-02 Weight Angel Limited Système de détection de charge pour véhicule
EP2962550A1 (fr) * 2014-07-03 2016-01-06 John Deere Forestry Oy Dispositif de transport comprenant un capteur de déformation

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