SI9011904A

SI9011904A - Truck load weighing method and apparatus

Info

Publication number: SI9011904A
Application number: SI9011904A
Authority: SI
Inventors: Glenn A Shankle; Dwight Baker; Richard D Baney; Paul L Kelsey; Erwin T Stoldt
Original assignee: Letourneau Inc
Priority date: 1989-10-12
Filing date: 1990-10-10
Publication date: 1997-02-28
Also published as: HRP930427A2

Abstract

Postopek in naprava za določitev mase tovora tovornega vozila, vsebujoča korake: nakladanje tovora na tovorno vozilo, zaznavanje tlaka v nagibnih cilindrih za določitev količine tovora, prikaz mase tovora, vzpostavitev povratne informacije v zvezi z vplivom spreminjanja težišča tovora za korigiranje mase tovora, kakršna je bila določena, in dajanje popravljene mase tovora. Naprava vsebuje tovorno vozilo z nagibnim tovornim zabojem, pri čemer je slednji povezan z okvirom tovornega vozila in ga v praznilni položaj nagneta nagibna cilindra, zaznavalno napravo za zaznavanje tlaka v nagibnih cilindrih, ko le-ta nosita tovorni zaboj nad namenskim opornim nastavkom, podatkovni procesor, ki ima podatke o naložitvi tovornega vozila in prejme informacije o tlaku, ki ga zaznava zaznavalna naprava, ter ima izhod h kazalnima napravama za maso tovora.Method and apparatus for determining the mass of the load truck, containing the steps: loading cargo to the truck, tilt pressure sensing cylinders for determining the amount of cargo, display of mass freight, establishing feedback regarding the impact of changing the center of gravity of the load to correct the mass of the load as determined and the delivery repaired cargo masses. The device contains a freight a vehicle with a tilt load box, where the latter connected to the frame of the lorry and to emptying position inclined tilting cylinders, detectable pressure sensing device in tilt cylinders when they carry a load box over a dedicated support an extension, a data processor that has data on loading a lorry and receiving information on pressure detected by the sensing device and having output to pointing devices for load mass.

Description

Marathon LeToumeau CompanyMarathon LeToumeau Company

Postopek in naprava za določitev mase tovora na tovornem voziluProcedure and apparatus for determining the mass of cargo on a lorry

Predloženi izum se nanaša na postopek in napravo za določitev mase tovora, ki ga nosijo velika tovorna vozila. Tovrstna vozila se običajno uporabljajo v rudarstvu v dnevnih kopih.The present invention relates to a method and apparatus for determining the mass of cargo carried by large goods vehicles. Such vehicles are commonly used in mining in day mines.

Sistemi za nakladanje tovora na tovorna vozila so se v preteklosti za tovorna vozila, ki nosijo zelo težke tovore, že uporabljali. Gre za sisteme, ki določajo maso naloženega tovora, da tovorna vozila niso preobremenjena in da se ve, koliko materiala prevaža skupina tovrstnih tovornih vozil.Cargo loading systems have been used in the past for heavy goods vehicles. These are systems that determine the mass of loaded cargo, that trucks are not overloaded and that it is known how much material is transported by a group of such vehicles.

Patent US 4,831,539 razkriva postopek in napravo za kompletni sistem, ki vzpostavlja zvezo od tovornih vozil k centrali, tako da se količina na tovorna vozila naloženega in s tovornimi vozili prepeljanega tovora kot tudi lokacije, kamor je material bil prepeljan in razložen, nenehno in v popolnosti zapisujejo. Naprava za določanje količine tovora obsega s fluidom napolnjeno cevje, ki nadomešča blažilne nosilne materiale, dodane vzdolž vzporednih nosilcev okvira. S fluidom napolnjeno cevje, kombinirano s tlačnimi senzorji, omogoča pridobitev želene informacije o masi tovora, ki ga nosi tovorno vozilo.U.S. Patent 4,831,539 discloses a process and device for a complete system that establishes a connection from trucks to the plant, so that the amount of cargo loaded and transported by freight vehicles, as well as the location to which the material was transported and explained, is constantly and completely they record. The load-measuring device comprises a fluid-filled tube, which replaces the damping support materials added along the parallel frame supports. The fluid-filled tube, combined with pressure sensors, allows you to obtain the desired information about the weight of the load carried by the truck.

Patent US 4,839,835 razkriva podobno s fluidom napolnjeno cevje med nosilcema in okvirom za sodelovanje s tlačnimi senzorji, da se dobi želeni podatek o masi. Omenjeni patent vsebuje razčlenitev predhodnih poskusov določanja količine tovora in razčlenitev problemov, ki se pojavljajo zaradi zgibne zveze med okvirom in tovornim zabojem, ter pomanjkljivosti koncentracije tovora na okviru zaradi uporabe bremenskih senzorjev, ki so vgrajeni v šamirske sklope in v hidravliko. Eden teh problemov je po tamkajšnji omembi prenos bremena na zgradbo vozila. V takem primeru hidravlična cilindra odražata skupno breme, ki se prenaša, in ne le del bremena, kot je to slučaj pri običajnem tovornem vozilu z nagibnim tovornim zabojem.U.S. Patent 4,839,835 discloses a fluid-filled tube between supports and a frame for cooperating with pressure sensors to obtain the desired mass data. This patent contains a breakdown of previous attempts to determine the volume of cargo and a breakdown of problems arising from the articulated connection between the frame and the cargo box, as well as deficiencies in the concentration of cargo on the frame due to the use of load sensors mounted in shamrock assemblies and in hydraulics. One of these problems is the transfer of the load to the vehicle structure, mentioned there. In such a case, the hydraulic cylinders reflect the total load being carried and not just a part of the load, as is the case with a conventional tilt truck.

Predloženi izum se nanaša na izboljšan postopek in napravo za določitev mase tovora, ki ga nosi tovorno vozilo vrste z nagibnim tovornim zabojem. Hidravlična cilindra za nagibanje tovornega zaboja sta uporabljena tako, da se zasleduje tlačno breme, ki je, če je korigirano s faktorjem, ki upošteva maso bremena, ki jo nosijo šamiiji, in splošno porazdelitev bremena po tovornem zaboju, pokazatelj mase bremena v tovornem zaboju.The present invention relates to an improved process and apparatus for determining the weight of a load carried by a tilting type truck. The hydraulic cylinders for tilting the cargo box are used to follow the pressure load, which, when corrected by a factor that takes into account the mass of the load carried by the shamis and the overall load distribution across the cargo box, is an indicator of the load mass in the cargo box.

Ustvariti izboljšan postopek in napravo za določitev mase tovora, ki ga nosi tovorno vozilo vrste z nagibnim tovornim zabojem, pri čemer bo šlo za enostavno zgrajeno in zanesljivo delujočo napravo, je cilj predloženega izuma.The object of the present invention is to provide an improved process and apparatus for determining the mass of the load carried by a tilt truck of a type with a tilting cargo box.

Nadaljnji cilj je ustvariti izboljšan postopek in napravo za določitev mase tovora tovornega vozila vrste z nagibnim tovornim zabojem, ki zanesljivo pokaže maso tovora v naloženem stanju, tako da tovorno vozilo ni preveč obremenjeno.A further objective is to create an improved process and device for determining the weight of a lorry of a type with a tilting cargo box, which reliably shows the mass of the load in the loaded state, so that the lorry is not excessively loaded.

Še en cilj predloženega izuma pa je ustvariti izboljšan postopek in napravo za določitev mase tovora tovornega vozila vrste z nagibnim tovornim zabojem, pri kateri je oprema za zaznavanje tovora lahko zaščitena pred sunki nakladanja materiala tovora, ko ta pada v tovorni zaboj vozila.Another object of the present invention is to provide an improved process and apparatus for determining the weight of a lorry of a type with a tilting cargo box, in which the load sensing equipment can be protected from the impact of loading material of a load when it falls into the cargo box of a vehicle.

Ti in drugi cilji in prednosti predloženega izuma so v podrobnostih obdelani in obrazloženi ob pomoči priloženih skic, v katerih kaže sl. 1 težko tovorno vozilo vrste z nagibnim tovornim zabojem, na katerem je uporabljen predloženi izum, v narisni projekciji, pri čemer sta nagibna cilindra tovorni zaboj vozila za malenkost dvignila, da se lahko zazna masa tovora v tovornem zaboju, sl. 2 podrobnost iz narisne projekcije nagibnega tovornega zaboja in odbijača ali naslona zanj na okviru, na katerega tovorni zaboj naleže, ko nagibna cilindra povsem popustita, sl. 3 isto tovorno vozilo v prostorski predstavitvi in v stanju s tovornim zabojem v nagnjenem položaju, pri čemer so sestavni deli predloženega izuma predstavljeni v njihovem relativnem položaju glede na vozilo, sl. 4 podrobnost tovornega vozila, konkretno voznikovo kabino v prostorski predstavitvi, pri čemer je vrisan najprimernejši položaj indikatorja mase za voznika in procesorja, ki preračuna maso in jo pošlje indikatorju mase za voznika, sl. 5 podrobnost voznikove kabine tovornega vozila, konkretno eno stran kabine, v prostorski predstavitvi, ki kaže kontrolne luči za nakladalca, sl. 6 podrobnost tovornega vozila, konkretno hidravlični sistem in sistem za zaznavanje mase naloženega tovora, ki je uporabljen skupaj z nagibnim cilindrom na eni strani tovornega vozila, v prostorski projekciji, in sl. 7 vezno shemo delovnih korakov za izvedbo postopka po predloženem izumu.These and other objects and advantages of the present invention are elaborated and explained in detail by means of the accompanying drawings, in which FIG. 1 is a heavy-duty vehicle of the type with a tilting box using the present invention in outline projection, with the tilting cylinders lifting the cargo box of the vehicle slightly so that the weight of the cargo in the cargo box can be detected, FIG. 2 is a detail from the outline projection of the tilting box and the bumper or the backrest thereof on the frame on which the cargo box rests when the tilting cylinders are completely loosened, FIG. 3 shows the same truck in a spatial representation and in a cargo box condition in an inclined position, wherein the components of the present invention are presented in their relative position relative to the vehicle, FIG. 4 is a detail of a lorry, specifically a driver's cab in a spatial representation, with the preferred position of the mass indicator for the driver and the processor calculating the mass and sending it to the mass indicator for the driver, FIG. 5 is a detail view of the driver's cab of a lorry, specifically one side of the cab, in a spatial representation showing the tell-tale lights for the loader, FIG. 6 is a detail of a truck, specifically a hydraulic system and a load sensing system, which is used in conjunction with the tilting cylinder on one side of the truck, in spatial projection, and FIG. 7 is a schematic diagram of work steps for carrying out the process of the present invention.

Tovorno vozilo 10, kakršno je predstavljeno na skicah, je tipično vozilo velike zmogljivosti za odvažanje trdnega materiala, kot je ruda. Vozilo ima okvir 12, ki ga nosijo kolesa 14, in nagiben tovorni zaboj 16, ki je z okvirom 12 povezan zgibno preko šamiija 18, razporejenega pod tovornim zabojem 16 blizu zadnjega konca okvira 12, in nagibnih cilindrov 20, ki ga podpirata na mestu, ki je, kot se vidi s skice, kar opazno oddaljeno od zadnjega konca zaboja 16. Kot kažeta skici sl. 1 in 2, okvir 12 nosi oporo 22, razporejeno za sprejem spodnjega mejnega dela 24 zaboja 16, ki pri normalnih operacijah nalega nanjo, razen če je drugačnost posebej omenjena.The truck 10 as shown in the drawings is a typical high-capacity vehicle for the removal of solid material such as ore. The vehicle has a frame 12 carried by the wheels 14 and a tilting cargo box 16 which is articulated with the frame 12 via a shami 18 arranged below the cargo box 16 near the rear end of the frame 12, and tilting cylinders 20 supporting it in place, which is, as seen from the sketch, noticeably distant from the rear end of the box 16. As shown in the sketches of FIG. 1 and 2, the frame 12 bears a support 22 arranged to receive the lower boundary portion 24 of the casing 16, which, in normal operations, rests upon it, unless otherwise noted.

Vozilo 10 upravlja voznik, ki je v kabini 26, v kateri se na primernem mestu nahaja tudi indikator 28 mase tovora, tako da ga voznik lahko vidi in z njega odčita ugotovljeni podatek. V kabini je na mestu, kjer ne ovira voznikovih gibov, razporejen tudi podatkovni procesor 30. Indikator 28 mase tovora in podatkovni procesor 30 sta nakazana na skicah sl. 3 in 4.Vehicle 10 is operated by the driver in the cab 26, which also has a cargo weight indicator 28 at a convenient location so that the driver can see it and read the determined information. In the cab, a data processor 30 is also arranged at a location which does not interfere with the driver's movements. The load mass indicator 28 and the data processor 30 are shown in the drawings of FIG. 3 and 4.

V cevovod 36, ki s hidravličnim fluidom pod pritiskom oskrbuje nagibna cilindra 20, sta vgrajeni primerna vzdrževalna naprava 32, npr. akumulator, in zaznavalna naprava 34. Zaznavalna naprava 34 je v cevovod 36 vgrajena tako, da lahko zaznava višino tlaka v nagibnih cilindrih 20, ko le-ta dvigata zaboj 16 s tovorom v njem. Zadevna naprava je predstavljena v skicah sl. 3 in 6.Suitable maintenance device 32 is installed in the pipeline 36, which supplies the tilting cylinders 20 with hydraulic fluid under pressure, e.g. a battery, and a sensing device 34. A sensing device 34 is integrated into the pipeline 36 so that it can detect the height of pressure in the tilting cylinders 20 when they are lifted by a container 16 with a load therein. The apparatus in question is presented in the drawings of FIG. 3 and 6.

Včasih je delavcu, ki naklada material v tovorni zaboj vozila, potrebna informacija o tem, koliko tovora je že v zaboju. Do take informacije pride s pomočjo signalnih luči 38, razporejenih na primernem mestu, tako da jih delavec, ki naklada, z lahkoto vidi, naprimer na obeh straneh vozila 10 na mestu blizu zadka kabine 26, kot je nakazano na skici sl. 3. Zadevna podrobnost signalnih luči 38 je bolj na veliko predstavljena v skici sl. 5, s katere se vidi, da signalno luč 38 nosi okvir 12 zadaj za kabino 26 in da zadevna signalna luč obsega tri svetila, namreč spodnje, zeleno svetilo 40, vmesno, rumenkastoijavo svetilo 42 in zgornje, rdeče svetilo 44. Zeleno svetilo 40 sveti tedaj, ko je merjeni tovor zadosti manjši od največje dovoljene mase tovora. Rumenkastorjavo svetilo 42 sveti, ko se masa tovora bliža največji želeni masi tovora, rdeče svetilo 44 pa tedaj, ko je največja masa tovora bila dosežena in ko naj se nakladanje konča.Sometimes a worker loading material into a truck's cargo bin may need information about how much cargo is already in the crate. Such information is obtained by means of signal lights 38 arranged in a convenient location so that the loading worker can easily see them, for example on both sides of the vehicle 10 at a position near the rear of the cab 26, as indicated in the sketch of FIG. 3. The detail of the signal lights 38 in question is more fully illustrated in FIG. 5, which shows that the signal light 38 bears a frame 12 behind the cab 26 and that the respective signal light comprises three lamps, namely the lower green lamp 40, the intermediate, the yellow-colored lamp 42 and the upper red lamp 44. The green lamp 40 is illuminated. when the measured load is sufficiently less than the maximum permissible mass of the load. The yellow-brown lamp 42 illuminates when the weight of the load approaches the maximum desired mass of the load, and the red lamp 44 when the maximum mass of the load has been reached and when loading is to be completed.

Zaznavalna naprava 34, indikator 28 mase tovora in signalne luči 38 so povezani s podatkovnim procesoijem 30, ki obdela podatke iz zaznavalne naprave 34 kot tudi podatke, ki so v njej shranjeni od prej, in izdela primeren izhodni podatek za indikator 28 mase tovora in signalne luči 38. Podatkovni procesor 30 je razen tega lahko še spopolnjen, s tem da je opremljen z radijsko zvezo za oddajanje podatkov v centralo in sprejemanje podatkov iz nje, o čemer je podrobno govor spodaj. Nadalje je vozniku tovornega vozila 10 omogočeno vnašanje vhodnih podatkov v podatkovni procesor 30. Med podatkovnim procesoijem 30 in drugimi sestavnimi deli je vzpostavljena komunikacijska kabelska zveza, kot je opisana.The sensing device 34, the load mass indicator 28 and the signal lights 38 are connected to a data procession 30 which processes the data from the sensing device 34 as well as the data stored therein and produces a suitable output for the load mass and signal indicator 28 38. The data processor 30 may further be further refined by having a radio link for transmitting data to and receiving data from the control panel, discussed in detail below. Further, the driver of the truck 10 is provided with input data into the data processor 30. A communication cable connection is established between the data processor 30 and the other components as described.

Po vgraditvi izboljšane naprave za določitev mase tovora po predloženem izumu v tovorno vozilo 10 tovorno vozilo prepeljemo na mesto nakladanja, kjer primerna nakladalna naprava naloži v transportni zaboj 16 rudo ali drugo gradivo, ki naj ga med obratovanjem tovorno vozilo 10 prepelje. Normalno se daje prednost stanju, ko je transportni zaboj 16 med polnjenjem podprt s šamirjem 18 in opornim nastavkom 22, tako da sta nagibna cilindra 20 in njuna priključena hidravlična sistema zaščitena pred udarci tovora, ko le-ta pada v tovorni zaboj. To se doseže s tem, da tovorni zaboj 16 spustimo na oporni nastavek 22, preden prvi vsipek pade v tovorni zaboj, zatem tovorni zaboj 16 z nagibnima cilindroma 20 malo dvignemo, da podatkovni procesor 30 dobi informacijo o tovoru, nakar pred vsutjem naslednjega vsipka tovorni zaboj spet spustimo na oporni nastavek 22. Tako voznik tovornega vozila preko indikatorja 28 mase tovora, nakladalec pa preko signalnih luči 38 nenehno zasledujeta količino naloženega materiala. Dasiravno normalno ni zaželeno, pa tovorni zaboj 16 lahko ostane v malo nagnjenem položaju, kot to kaže sl. 1, tako daje stalno na voljo odčitavanje podatka o masi tovora v zaboju 16. V primeru, da voznik med nakladanjem tovora stalno zasleduje količino naloženega tovora, priporočamo, da je na voljo podatek o začetni naložitvi, tako da se ve samo, da minimalne količine tovora še nismo dosegli, kajti sistem za določanje količine tovora je podvržen temu, da med začetnim nakladanjem nepravilno odčitava stanje, saj porazdelitev tovora po dolžini tovornega zaboja lahko privede do podatka, da gre za malo dodanega tovora ali pa da je bilo dodanega mnogo več tovora - odvisno pač od tega, kam v tovornem zaboju je bil material stresen. Zavajajoč podatek namreč voznika lahko pripravi do tega, da danim podatkom ne zaupa in da on kazalnik izključi, ko ve, da podatki ne ustrezajo pravi količini dodanega tovora, katero ocenjuje po svoji lastni izkušnji.After installing an improved device for determining the weight of the load of the present invention in a truck 10, the truck is transported to the loading point, where a suitable loading device loads the ore or other material to be transported by the truck 10 during operation. Normally, it is preferred that the transport box 16 is backed up by the sham 18 and the support 22 during loading, so that the tilting cylinders 20 and their connected hydraulic systems are protected from shock when the load falls into the cargo box. This is achieved by lowering the load box 16 onto the support nozzle 22 before the first load drops into the load bin, then lift the load box 16 with the tilting cylinders 20 slightly so that the data processor 30 receives information about the load, and then before loading the next load container The box is again lowered to the support nozzle 22. Thus, the truck driver constantly monitors the amount of material loaded through the indicator lights 38 through the load mass indicator 28 and the loader through the signal lights 38. Dosing normally is not desirable, however, the cargo box 16 may remain in a slightly inclined position, as shown in FIG. 1, so that the readout of the load mass in the crate is permanently available 16. If the driver is constantly tracking the amount of load loaded during loading, it is recommended that the initial loading data be available so that only the minimum quantities are known We have not yet reached the load, because the system for determining the volume of cargo is subject to incorrect reading during the initial loading, since the distribution of cargo over the length of the cargo box may lead to the fact that there is little or no cargo added. - Depending on where the material in the cargo box was stressful. Namely, misleading information can lead the driver to distrust the given data and to exclude the indicator when he / she knows that the data do not correspond to the right amount of added cargo, which he / she estimates in his / her own experience.

Drug postopek delovanja sistema je osnovan na tem, da se masa tovora kontrolira samo na koncu, ko je nakladanje končano. To se lahko opravi, preden tovorno vozilo krene z mesta nakladanja, ali, po želji, na kraju stresanja tovora. Na mestu odlaganja se to lahko opravi tako, da zaznavamo tovor, ko sta nagibna cilindra v iztegnjenem položaju, kajti podatke o količini tovora odčitavamo tedaj. Če se količina tovora določa ob praznjenju, se podatki o masi tovora posredujejo nakladalcu, tako da temu, če se je razmerje mase proti prostornini materiala menjalo, kar pomeni, da je polna zajemalka ali druga nakladalna naprava postala mnogo težja ali lažja, ni treba tolikokrat zajeti ali da mora dodatno zajemati, če hoče povsem napolniti vozilo.Another system operation is based on the fact that the weight of the load is controlled only at the end when loading is complete. This can be done before the truck leaves the loading area or, if desired, at the point of shaking of the load. At the point of deposition, this can be done by detecting the load when the tilting cylinders are in the extended position, as the load volume data is then read. If the amount of cargo is determined at discharge, the data on the mass of the cargo are transmitted to the loader, so that if the ratio of mass to volume of material has changed, which means that the full scoop or other loading device has become much heavier or lighter, then many times to cover or to additionally cover in order to fully charge the vehicle.

Pripomniti velja, da se da količino tovora določati pri dveh različnih položajih raztegnitve nagibnih cilindrov 20. Če gre za določanje, ko sta cilindra samo minimalno raztegnjena in ko sta cilindra raztegnjena bistveno več kot minimalno, se pride do podatka o težišču tovora in s tem do prave mase tovora. Nadaljnji korak, ki se ga lahko poslužimo za izboljšanje določanja mase tovora, je, da tovorno vozilo po naložitvi stehtamo in informacijo o rezultatu tehtanja posredujemo procesorju 30, v katerem se podatki tehtanja v prihodnje lahko korigirajo, če gre za kompenzacijo odstopanja težišča tovora v trenutku zaznavanja.It should be noted that the amount of load can be determined at two different tilting cylinders 20. When determining when the cylinders are only minimally stretched and when the cylinders are stretched substantially more than minimum, then the center of gravity is obtained and thus the real masses of cargo. A further step that can be taken to improve the determination of the weight of the load is to weigh the truck after loading and transmit the weighing result information to the processor 30, in which the weighing data can be corrected in the future if compensation is given for the moment of gravity of the load center of gravity. perceptions.

Koraki delovanja sistema po predloženem izumu so predstavljeni v skici sl. 7. Nakladalni korak 50 je prvi korak, ko tovorno vozilo 10 postavimo na mesto nakladanja in ko primerna nakladalna naprava, naprimer zajemalni transporter ali druga nakladalna naprava, zajame material, denimo rudo, in jo transportira v tovorni zaboj 16 tovornega vozila 10. Korak 52 je drugi korak in pri njem gre za zaznavanje mase tovora v tovornem zaboju in za kazanje podatka o njej. Korak 54 je drugotni kazalni korak, v katerem gre za ločeno zaznavanje in kazanje z menjalnim položajem nagib6 nih cilindrov 20. Ta, drugotni kazalni korak 54 poskrbi za povratno informacijo podatkovnemu procesorju 30, s čimer se korigira določanje mase tovora. Korak 56 predstavlja odhod tovornega vozila z nakladalnega polja in prehaja v korak 58 za dejansko določanje mase vozila in tovora za potrebe povratne informacije za korigiranje začetnega določanja mase tovora, ko drugotni korak 54 ni bil vključen. Korak 60 je zvračanje tovora in tovorno vozilo se vrača na mesto nakladanja.The steps of operation of the system of the present invention are presented in FIG. 7. Loading step 50 is the first step when placing truck 10 at the loading location and when a suitable loading device, such as a pickup conveyor or other loading device, captures material, such as ore, and transports it to the cargo box 16 of the truck 10. Step 52 is the second step, and it is about detecting the weight of the cargo in the cargo box and showing it. Step 54 is a secondary pointing step in which it is a separate detection and indication of the tilting cylinders 20. This second step 54 provides feedback to the data processor 30, thereby correcting the load mass determination. Step 56 represents the departure of the truck from the loading field and goes to step 58 to actually determine the mass of the vehicle and the load for feedback purposes to correct the initial determination of the load mass when the second step 54 was not included. Step 60 is the reversing of the load and the truck returns to the loading location.

Claims

1. A method for determining the mass of material in a cargo box of a tilt truck box, the cargo box being hingedly connected to the truck frame and operated by the tilting cylinder, characterized in that it comprises the following procedural steps:

loading material ready to be hauled, tilting cylinders extracted to such an extent that it is ensured that the cargo contained in the cargo box does not directly carry the frame of the lorry, the measurement of hydraulic fluid pressure in the tilting cylinders, the preselected correction for load distribution according to cargo box and for the amount of cargo carried by the hinges, and for the alleged distribution of material in the cargo box to determine the weight of the cargo in the cargo box, the second measurement to determine a pre-selected correction for the distribution of cargo weight after the cargo box, a change of said pre-selected correction for use in a given procedural step, and determining the mass of the load of the following items on the truck using the modified correction.

The method of claim 1, characterized in that said secondary measurement step comprises the step of:

Measurement of the total mass of the lorry and its load and deduction of the tare mass of the lorry without load on it to determine the actual mass of the load and use the real mass of the load to determine the pre-selected correction for use together with the correction in determining the mass of the load based on the pressure detected in the tilts cylinders.

A method according to claim 1, characterized in that said secondary measurement step comprises the step of:

extracting the tilting cylinders to a position beyond the position of the first pressure measurement and measuring the fluid pressure in the tilting cylinders to determine a preselected correction for use in determining the mass of the load.

A method as in claim 1, characterized in that:

the correction is applied by means of a vehicle-mounted processor carried by the vehicle, and the processor is changed to reflect the dependence of the true weight of the load on the determined mass of the load using a pre-selected correction.

A method as in claim 1, characterized in that it comprises the steps of: determining the actual weight of the load after multiple bursts, and changing a pre-selected correction to reflect a deviation from the originally pre-selected correction of all determined actual cargo loads.

A method according to claim 1, characterized in that it comprises the step of:

extraction of tilting cylinders just before determining the mass of the load to ensure that the cargo box does not fit on the frame other than in the shamites with which the jw is attached to it.

A method according to claim 6, characterized in that:

the step of extracting the tilting cylinders is performed after receiving each load of material load, and before receiving the next load the tilting cylinders shrink, thus avoiding loading from the impact of each load load falling into the cargo box.

A method according to claim 1, characterized in that it comprises the step of: establishing an indicator of the corrected load mass in the lorry during at least part of loading on it.

A method according to claim 8, characterized in that it comprises the step of:

deferral of the load mass indicator in the lorry until the load mass reaches a pre-selected level to ensure that no incorrect readings of the load quantity are made after each load taken by the vehicle.

A method according to claim 1, characterized in that it comprises the step of: establishing a sign that it is approaching and that the maximum of the desired mass of cargo visible to the loader is reached.

11. A load-sensing device on a lorry, characterized in that it comprises:

truck having a frame, cargo box, means of rotation between the cargo box and the frame, tilting cylinders for tilting the cargo box with respect to the frame, means for moving the truck and a built-in processor carried by the truck, pressure sensing means in tilting cylinders, means for transferring detected pressure from tilting cylinders to embedded processor, pre-selected correction set in embedded processor for converting tilting cylinder pressures to cargo weight, means for determining said pre-selected correction, means for transmitting pre-selected correction into a built-in processor for combining with the weight of the load determined by the tilting cylinders to determine the corrected weight of the load, and the means on the lorry indicating the corrected weight of the load determined by the processor.

Apparatus according to claim 11, characterized in that said means, which indicates the weight of the load, comprises:

a device for directly indicating the mass of the load.

Apparatus according to claim 11, characterized in that said means for indicating the weight of the load comprises:

lights that give the loader an indication that we are approaching the maximum mass of cargo and that we have reached it.

Apparatus according to claim 11, characterized in that said means for determining a pre-selected correction comprises:

means for determining the weight of the loaded truck, means for transmitting the weight of the loaded truck to a built-in processor for changing a pre-selected correction.

at least two preselected positions for tilt cylinders where cylinder pressure sensing can be performed and means for transmitting data from pressure sensing at two preselected positions for tilting cylinders to change a preselected correction.