SE537574C2 - Load-sensing elements, procedure and unit of calculation in vehicles - Google Patents

Abstract

537 574 SUMMARY Load scanning elements (150), method (300) and calculation unit (200) in a vehicle (100) are determined by vehicle weight of the vehicle (100), where the vehicle (100) has at least two wheel axles (130) and a chassis (110). The load sensing element (150) is included in a load-bearing vehicle component (120) which engages in a connection between the respective wheel axle (130) and chassis (110) of the vehicle (100), the load-bearing vehicle component (120) having a manufacturing tolerance of less than one established first spruce value.

Description

TECHNICAL FIELD This document describes a load-scanning element, a calculating unit and a procedure. More specifically, a load-sensing element is described included in a load-bearing vehicle component which forms a connection between the wheel axle and the chassis of the vehicle.

BACKGROUND In a vehicle, perhaps especially a vehicle that sometimes has a load of different weights and volumes, such as a truck, a truck, a bus or the like, it is often difficult to get an estimate of the vehicle's current total weight including load.

This weight estimate can also be used for a number of different calculations in the vehicle, for example to calculate fuel consumption, braking distance or lamp air pressure in the vehicle. for example. Thus, accidents can be avoided by a correct and current weight determination of the vehicle and its load.

A number of different food systems / weighing systems have been developed for dells andarnal. These are based, for example, on flakes of the following techniques, such as: angle sensors with a lance or the like to measure the distance between the axle and the chassis; angle sensors for feeding the extension of the spring or the distance between the axle and the chassis; wire strain gauges glued or screwed onto chassis components; load cells between chassis and superstructure and / or load cells between chassis and superstructure in combination with pressure sensor in hydraulic cylinder.

The problem with the three first-mentioned techniques above is that they involve feeding on a vehicle component that is designed to be a chassis component with the longevity and durability requirements that are necessary for it, but not accuracy in terms of elongation and deformation. In this context, large manufacturing tolerances can often occur. These large tolerances mean that it becomes in principle impossible to install these weighing systems without calibrating the selected individual, which is time-consuming and therefore expensive. Another tankable & flake is to manufacture the above-mentioned chassis components with higher manufacturing tolerance. However, this becomes very expensive, and hardly fulfills any other function, apart from just feeding the vehicle's load weight.

A problem with the two latter methods mentioned above, which include load cells between the chassis and the superstructure, is that these are expensive, add a lot of weight and only feed the mass 1,537,574 above the chassis. These systems depend on what the structure looks like and can result in many variants. These systems can also be difficult to retrofit, which can be expensive.

Another problem is that the load in a vehicle can be displaced during driving, for example during take-off due to centrifugal forces. This can damage the load. Furthermore, the vehicle may have pre-assembled driving characteristics to the NO of all the vehicle's center of gravity shifted. There is a need for everyone to be able to feed the current vehicle weight momentarily, without time-consuming individual calibration of a feeding system for each vehicle.

SUMMARY It is necessary to develop the weight feed in a vehicle in order to read at least some of the above problems and to obtain an improved weight feed in the vehicle.

According to a first aspect, this grinding is achieved by a load-scanning element in a vehicle. The load sensing element is arranged to determine the vehicle weight of the vehicle, which comprises at least two wheel axles and a chassis. The load-sensing element is included in a load-bearing vehicle component which engages in a connection between the respective wheel axle and chassis of the vehicle, where the load-bearing vehicle component has a manufacturing tolerance which is less than a fixed first inspection value.

According to a second aspect, this objective is achieved by a procedure in a calculation unit in a vehicle, for determining the vehicle weight of the vehicle. The vehicle has at least two wheel axles and a chassis, as well as a number of load-scanning elements. The method comprises collecting a respective food value from the load sensing elements in the vehicle. Furthermore, the method comprises summing the collected food values. The method further comprises calculating the vehicle weight of the vehicle, based on the summed food values, by converting these to a weight value, to which a constant corresponding to the weight of the vehicle on wheels, wheel axles and suspension is added.

According to a third aspect, this targeting is achieved by a calculating unit in a vehicle. The monitoring unit is arranged for determining the vehicle weight of the vehicle. The vehicle has at least two wheel axles and a chassis, as well as a number of load-scanning elements. The calculation unit comprises a communication module, arranged to receive all signals representing a respective food value from all load-sensing elements in the vehicle. Furthermore, the calculation unit comprises a processor, arranged to sum up the collected food values, and also arranged to calculate the vehicle weight of the vehicle, based on the summed food values, by converting these to a weight value, to which a constant corresponding to the weight of the vehicle on wheels, wheel axles and suspension added.

Flarigenom; by placing load-sensing elements in load-bearing vehicle components in a vehicle, where the load-bearing vehicle components are manufactured with a manufacturing tolerance below a spruce value, a food system can be obtained to measure vehicle weight in a reliable manner without time-consuming and thus costly individual loading. the elements of each vehicle must be gOras. This results in a more reliable and improved feed of the weight of the vehicle, compared with prior art.

Other advantages and additional features will become apparent from the following detailed description.

LIST OF FIGURES Embodiments of the invention will now be described in further detail with reference to the accompanying figures, which illustrate various embodiments: Figure 1 Illustrates a scenario with a vehicle with a load-sensing element in a load-bearing vehicle component according to an embodiment.

Figure 1 Illustrates a load scanning element according to an embodiment.

Figure 2 Illustrates a scenario with a vehicle with a load-sensing element in a load-bearing vehicle component according to an embodiment.

Figure 2 Illustrates a load scanning element according to an embodiment.

Figure 2Cillustrates a load scanning element according to an embodiment.

Figure 3 is a flow chart illustrating an embodiment of the invention.

Figure 4 is an illustration of a calculating unit in connection with a load scanning element, according to an embodiment of the invention.

DETAILED DESCRIPTION Embodiments of the invention comprise a load scanning element, a method and a calculation unit, which can be realized according to any of the examples described below. However, this invention can be practiced in many different forms and should not be construed as limited by the embodiments described, which are instead intended to illustrate and obscure various aspects.

Additional aspects and features of the invention will become apparent from the following detailed description when considered in conjunction with the accompanying figures. However, the figures are to be considered only as examples of different embodiments of the invention and should not be construed as limiting the invention, which is limited only by the appended claims. Furthermore, the figures are not necessarily to scale, and are, unless otherwise noted, intended to conceptually illustrate aspects of the invention.

Figure 1A shows a vehicle 100 with a chassis 110. The vehicle 100 may be arranged to be loaded with a load and consists of, for example, a truck, truck, transport vehicle, passenger car, emergency vehicle, bus, tank, motorcycle, fire truck, roof, tram, amphibious vehicle or other similar motorized or unmanned means of transport, adapted for geographical movement ashore.

A load-bearing component 120 is located in the vehicle chassis 110. In the illustrated embodiment, the load-bearing component 120 is provided by a spring bolt, which fastens the wheel suspension 1 of the vehicle in the chassis 110, in a front fastening and a rear fastening. There is therefore in this embodiment a first spring bolt 120-1 and a second spring bolt 120-2 which fasten the wheel suspension of the vehicle in the chassis 110 for each wheel axle 1 in the vehicle 100. Other embodiments may include a different number of spring bolts 120.

Figure 1B shows a load-bearing component 120 in the form of a spring bolt. This spring bolt 1 includes a load scanning element 150.

By placing the load sensing element 150, which may be constituted, for example, by a sensor, a wire strain gauge, a load cell, a piezoelectric element or the like, on a chassis component which carried the entire load weight, in some cases the tether bolt 120 with which the vehicle wheel load is attached weighing systems that are cheap, accurate and also include the chassis weight.

A strain gauge on a load sensing element 150 which can be described as an electrical conductor with electrical resistance / resistance. When the leader, the trade, is exposed, an extension or shortening of the resistance of others takes place in it. By feeding the change in resistance, an idea can be obtained of how much and at which hall the material is toasted. Desire gives increased resistance and vice versa. 4,537,574 A load cell is a type of load sensing element 150 that supplies forces. Normally they are used for feeding weight or load. A load cell is normally constructed with the help of wire strain gauges connected in Wheatstone's jetty. Since the differential voltage is typically only up to a few tens of millivolts, an amplifier for reading the signal from the load cell can be used in certain embodiments.

By placing the load-sensing element 150 in the spring bolt 120, which is placed between the wheel axle 130 and the spring 140 on all bearing wheel axles, the towing can be fed as a function of the entire mass of the vehicle, excluding axles and wheels. However, the weight of wheel axles and wheels can be measured or estimated separately and assumed to be constant. Darned, a weight calculation can compensate for this by adding a constant value. In some embodiments, compensation may be provided for dirt, mud, and the like that is stuck to the wheel axles and vehicle chassis. The weight of this is law, or very law in relation to the total weight of the vehicle, perhaps in the order of 0-30 kg.

The spring bolt 120 is a relatively cheap and easy-to-manufacture component that can be manufactured with high accuracy without any significant additional cost. Furthermore, the spring bolts 120 are made with high matte accuracy, as these are usually turned.

A further advantage of placing the load sensing element 150 in a spring bolt 120 which in turn attaches the wheel suspension 140 to the vehicle chassis 110 is that the load sensing element 150 is not subjected to static load from the screw connection. In addition, the sensor signal from the load sensing element 150 is not affected by the stiffness of other parts. Thus, one can avoid having to do an individual calibration for each vehicle 100, which facilitates and avoids assembly.

Figure 2A again shows a vehicle 100 with a chassis 110, similar to the vehicle 100 previously presented in Figure 1A. The vehicle 100 has a rear boogie wheel installation, which differs from the front axle schematically illustrated in Figure 1A. Has a spring 140 two wheel axles 1-1, 1-2 which are suspended on a pivot, also called bogie beam. In the illustrated example, this spring 140 is not suspended on a bolt joint but rests against a spring seat 120-1, 120-2 mounted in the front bogie shaft 130-1 and the rear bogie shaft 130-2, respectively. 537 574 By integrating load scanning elements 150, for example in the form of a load cell in respective spring sets 120-1, 120-2, a weighing system can be obtained which is cheap, accurate and also includes the chassis weight of the vehicle 100.

The load sensing element 150 can for instance be placed in the spring seat body 120-1, 12 and a lid can be placed on the load sensing element 150, as a replaceable detail as it wears when the spring 140 slides over the load sensing element 150 on the spring set 11, 120-2. A part of the carriage is thus protected by the load-sensing element 150 from wear and replacement intervals thereof. The location of the load sensing element 150 means that the entire mass of the vehicle will be supported by the load sensing element 150, regardless of irregularities that the bogie compensates for. If the load sensing element 150 is constructed so that both the vertical force vector is obtained, then any contribution from lateral loads and friction loads can be eliminated.

The location discussed has also been advantageous from a service and installation perspective. The load scanning elements 150 are integrated in small components which are easy to change and are protected; this applies to the alien embodiment embodied in Figures 1A and 1B. Furthermore, the installation of a weighing system without any need to calibrate each individual load scanning element 150 is possible.

Figure shows a spring 140 in a boogie wheel installation, for example in the vehicle 100 which has been damaged in Figure 2A. The spring 140 rests in one end on a spring seat 120 in one of the wheel axles 130 of the vehicle. In this spring seat 120, in certain embodiments, a load-scanning element 150 may be mounted. This load-sensing element 150 may have a protective cover 160 mounted, arranged to be placed between the load-sensing element 150 and the wheel suspension 140 so that the load-sensing element 150 is protected from wear due to the movement of the wheel suspension under load. The load scanning element 150 can be made of a load cell, other embodiments. Furthermore, the load sensing element 150 may be constructed to karma only of vertical forces according to certain embodiments.

Figure 2C shows the load sensing member 150 which has been damaged in Figure 2B, with a protective cover 160 placed on top of the load sensing member 150 between the spring 140 and the load sensing member 150, to reduce wear damage to the load sensing member 150 as the frame 140 comes under load. The protective cover 160 may, for example, 6 537 574 be made of a groove-resistant stable alloy; haghallfast stal; an alloy comprising tungsten carbide and cobalt; hard metal; ceramic based material or the like.

Figure 3 illustrates an example of an embodiment of the invention. The flow chart in Figure 3 illustrates a method 300 in a calculation unit 200 in a vehicle 100, for determining vehicle weight on the vehicle 100. The vehicle 100 has at least two wheel axles 130 and a chassis 110, and a number of load sensing elements 150. At least one of these wheel axles 130 can be constituted by a bogie axle, comprising a front axle 130-1 and a rear axle! 130-1 according to certain embodiments. Said load-sensing elements 150 in the vehicle 100 are arranged for determining vehicle weight on the vehicle 100. Each such load-sensing element 150 is included in a load-bearing vehicle component 120 which engages in a connection between the respective wheel axle 130 and chassis 110 on the vehicle 100. Furthermore, the load-bearing the vehicle component 120 has a manufacturing tolerance that is less than a fixed first value. In order to be able to determine the vehicle weight correctly, the method 300 may comprise a number of steps 301-304. It should be noted, however, that some of the described steps 301-304 may be performed in a different chronological order from what the numbering order suggests and that some or a plurality of them may be performed in parallel with each other, according to different forms of performance. Furthermore, certain steps are performed only in certain embodiments, such as, for example, step 302. The method 300 includes the following steps: Step 301 A respective food value from the load scanning elements 150 in the vehicle 100 is collected.

The food guard can be received from the load-scanning elements 150 over a wired or wire-loaded interface according to different embodiments.

The wired interface may, for example, comprise, or be based on, a cable connection, an Internet-connected network or a communication bus system consisting of one or more communication buses for connecting the enumerated units 150, 200 to each other and alternatively also to other units such as control unit, control unit and / or sensors. The communication bus may, for example, consist of one or more of a cable; a data bus, such as a CAN bus (Controller Area Network bus), a MOST bus (Media Oriented Systems Transport), or flagon other bus configuration. For example, the wireless interface may be based on or inspired by the flagship of the following technologies: Global System for Mobile Communications (GSM), Enhanced Data Rates for GSM Evolution (EDGE), Universal Mobile Telecommunications System (UMTS), Code Division 7 537 574 Access (CDMA), (CDMA 2000), Time Division Synchronous CDMA (TD-SCDMA), Long Term Evolution (LTE); Wireless Fidelity (Wi-Fi), defined by the Institute of Electrical and Electronics Engineers (IEEE) standards 802.11 a, ac, b, g and / or n, Internet Protocol (IP), Bluetooth and / or Near Field Communication, (NFC) , or similar communication technology according to different forms of performance.

The food value from the load-scanning elements 150 can be collected, for example, continuously during operation of the vehicle 100, or in individual food cases according to different forms of performance. For example, the calculating unit 200 may send a request for this food data at a certain time interval, for example every day, every hour, every minute, or as a result of another action which, for example in connection with the vehicle 100 being started or the driver requesting a feed.

With tata intervals, more reliable food information is obtained. With less frequent feed intervals 15, the calculation load on the calculation unit 200 decreases.

Step 302 This process step is not possible in some, but not necessarily all, embodiments.

Collected 301 food items from load-sensing elements 150 placed on different wheel axles 1 on the vehicle 100, and / or placed on the right and left sides of the vehicle 100, respectively. If the difference between these food values exceeds a second spruce value, a load displacement warning can be triggered to grab the driver's attention. Such a laser displacement warning may include, for example, a warning light being lit in the vehicle's instrument panel, an auditory warning signal being triggered, or the like.

In this way, a displacement of the load in the vehicle 100 while driving can be detected and also guarded by the driver before a flag accident occurs.

Step 303 The food values collected 301 collected from the load scanning elements 150 in the vehicle 100 are summed.

Step 304 The vehicle weight of the vehicle 100 is calculated, based on the summed 303 food values, by converting these food values to a weight value, to which a constant corresponding to the weight of the vehicle on wheels, wheel axles 130 and suspension 140 is added. 8 537 574 For example, the food value can be stored, for example, in a table, or a graph where the food value, corresponding to the strain value, is mapped to the weight value of the vehicle 100 and its load. In this way, a continuously updated weight calculation of the vehicle 100 can be obtained, which enables a more accurate calculation of the vehicle weight to be used as parameter values in the calculations performed in the vehicle 100, such as calculation of fuel consumption, possible rack width with current fuel quantity, braking distance, etc.

Figure 4 shows an embodiment of a system 400 comprising, inter alia, a calculating unit 200 and load sensing elements 150 in a vehicle 100. The system 400 is arranged to determine vehicle weight on the vehicle 100, where the vehicle 100 has at least two wheel axles 130 and a chassis 110. At least one of these wheel axles 130 may be constituted by a bogie axle, comprising a front axle 130-1 and a rear axle 130-1 according to certain embodiments.

The load-sensing element 150 is included in a load-bearing vehicle component 120 which engages in a connection between the respective wheel axle 130 and the chassis 110 of the vehicle 100) where the load-bearing vehicle component 120 has a manufacturing tolerance below a fixed first inspection value. The first spruce response may be predetermined or configurable according to various embodiments.

The load-bearing vehicle component 120 may in some embodiments be provided with a spring bolt, provided all fixed with a wheel suspension 140, which is fixed in the wheel axle 130 of the vehicle, with the vehicle chassis 110. Furthermore, in certain embodiments, the load-bearing vehicle component 120 may be a spring seat in one of the vehicle wheel axles 130, on which a wheel suspension 140 rests, which is fixed in the vehicle chassis 110. Furthermore, the vehicle 100 may in some embodiments include load-bearing vehicle components 120 of both types, depending for example on axle construction, such as single axle or bogie axle. on different shoulders. The load-sensing element 150 may in some embodiments be arranged to supply only the load in the vertical plane of the vehicle.

The load sensing element 150 may also be provided for mounting a protective cap 160. In some embodiments this protective cap 160 may be placed between the load sensing element 150 and the wheel suspension 140 so that the load sensing element 150 is protected from abrasion wear due to the movement of the wheel suspension under load. 9 537 574 In the latter case, the system 400 may also include such a protective cover 160, arranged to be placed between the load sensing element 150 and the wheel suspension 140, so that the load sensing element 150 is protected from wear due to the movement of the wheel suspension under load.

Furthermore, the system 400 also comprises a calculating unit 200 in the vehicle 100. The calculating unit 200 is arranged for determining vehicle weight on the vehicle 100, where the vehicle 100 has at least two wheel axles 130 and a chassis 110, and a number of load scanning elements 150.

This calculating unit 200 comprises a communication module 410, arranged to receive signals representing a respective food value from all load scanning elements 150 in the vehicle 100.

The calculating unit 200 may be arranged to receive food data from the load scanning elements 150 over a wired or a wireless interface according to different embodiments. The wired interface may, for example, comprise, or be based on, a cable connection, an Internet-connected network or a communication bus system consisting of one or more communication buses for connecting the enumerated units 150, 200 to each other and alternatively also to other units such as control unit, control unit and / or sensors. The communication bus may, for example, consist of one or more of a cable; a data bus, such as a CAN bus (Controller Area Network bus), a MOST bus (Media Oriented Systems Transport), or any other bus configuration. For example, the wireless interface may be based on or inspired by any of the following technologies: Global System for Mobile Communications (GSM), Enhanced Data Rates for GSM Evolution (EDGE), Universal Mobile Telecommunications System (UMTS), Code Division Access (CDMA ), (CDMA 2000), Time Division Synchronous CDMA (TD-SCDMA), Long Term Evolution (LTE); Wireless Fidelity (Wi-Fl), defined by the Institute of Electrical and Electronics Engineers (IEEE) standards 802.11 a, ac, b, g and / or n, Internet Protocol (IP), Bluetooth and / or Near Field Communication, (NFC) , or similar communication technology according to different embodiments.

Furthermore, the calculation unit 200 comprises a processor 420, arranged to sum up the collected food values, and also arranged to calculate the vehicle weight of the vehicle 100, based on the summed food values. Such calculation of the vehicle weight of the vehicle 100 involves a conversion of the summed food values from the load sensing elements 537 574 150 in the vehicle 100 to a weight value to which a constant corresponding to the weight of the vehicle on wheels, wheel axles 130 and suspension 140 is added.

The processor 420 may also in some embodiments be arranged to compare the collected food from load-sensing elements 150 placed on different wheel axles 130 on the vehicle 100, and / or placed on the right and left sides of the vehicle 100, respectively, and read a load-shift warning to the driver, if the difference between the jamparda vardena averskreides en andra gransvarde. So other spruce values can be predetermined or configurable according to different embodiments.

The processor circuit 420 may be comprised of, for example, one or more Central Processing Unit (CPU), microprocessor or other logic designed to interpret and execute instructions and / or to read and write data. The processor circuit 420 may handle data for influencing, waffling or data processing of data including also buffering data, control functions and the like.

The calculating unit 200 may further comprise a memory 425, arranged to store, for example, a constant corresponding to the rest of the vehicle on wheels, wheel axles 130 and suspension 140, in certain embodiments.

The memory unit 425 can be output from, for example, a memory card, flash memory, USB memory, hard disk or other similar data storage device, for example flags from the group: ROM (Read-Only Memory), PROM (Programmable Read-Only Memory), EPROM (Erasable PROM), Flash memory, EEPROM (Electrically Erasable PROM), etc., in various forms of operation.

Furthermore, the calculating unit 200 may also comprise a signal transmitter 430, arranged to transmit wired or wired control signals according to the previously described communication technologies. For example, the signal transmitter 430 may send a request for food information to the load sensing elements 150 of the vehicle 100. Furthermore, the signal transmitter 4 may send, for example, a control signal which initiates a warning for the vehicle driver that a load shift has occurred, under certain conditions. detected. An information unit 4 in the vehicle's wheelhouse can then call the driver's attention to this. Such an information unit 450 can be provided by an LED, a lamp, a loudspeaker which generates a warning sound, a screen which displays a warning message; or similar device. Furthermore, according to certain embodiments, the invention comprises a computer program in a vehicle 100, wherein the vehicle 100 has at least two wheel axles 130 and a chassis 110, and comprises a number of load sensing elements 150. The computer program relates to determining vehicle weight of the vehicle 100 by performing the method 300 according to at least some of steps 301-304, then the computer program is executed in a processor 420 in a computing unit 200 in the vehicle 100.

Thus, the method 300 according to at least some of the steps 301-304 may be implemented by one or more processor circuits 420 in the computing unit 200 together with computer program code to perform any, some, some or all of the steps 301-304 described above when the computer program comprising instructions for performing these steps 301-304 are loaded into the processor circuit 420.

This computer program described above may in some embodiments be arranged all installed in the memory unit 425, for example over a wireless or wired interface, for example some of the previously listed.

The communication module 410, and / or signal transmitters 430 described and discussed above, may in some embodiments be separate transmitters and receivers. However, in certain embodiments, the communication module 410 and signal transmitter 430 in the reconnaissance unit 200 of the vehicle 100 may be a sand receiver, or transceiver, which is adapted to both transmit and receive signals, such as radio signals, and parts of the structure, such as the antenna. , is common to sanders and receivers. The said communication can be adapted for wireless information transmission, via radio waves, WLAN, Bluetooth or infrared transmitter / receiver module. However, the communication module 410, and / or signal transmitter 430 in some embodiments may alternatively be specially adapted for wired information exchange, or alternatively for both wireless and wired communication according to certain embodiments.

Some embodiments of the invention also include a vehicle 100, which includes a system 400 installed in the vehicle 100 arranged to perform a method 300 according to at least one of the method steps 301-304, for determining vehicle weight on the vehicle 100. 12

Claims (13)

537 574 PATE NTKRAV A load scanning element (150) in a vehicle (100) for determining the vehicle weight of the vehicle (100), wherein the vehicle (100) has at least two wheel axles (130) and a chassis (110), the load scanning element (150) ) can be characterized by: that the load-sensing element (150) is arranged for inclusion in a load-bearing vehicle component (120) which forms a connection between the respective wheel axle (130) and chassis (110) on the vehicle (100), where the load-bearing vehicle component (120) ) consists of a spring bolt, arranged to fasten a wheel suspension (140), which is fixed in the wheel axle (130) of the vehicle, with the chassis (110) of the vehicle. A load-sensing element (150) according to claim 1, wherein the vehicle (100) has a wheel axle (130) which is a boogie axle, the load-bearing vehicle component (120) being constituted by a spring seat in said boogie axle, on which a wheel suspension (140 ) rests, which is fixed in the vehicle chassis (110). The load scanning element (150) according to claim 2, wherein the load scanning element (150) is arranged for mounting a protective cover (160), arranged to be placed between the load scanning element (150) and the wheel suspension (140) so that the load scanning element (140) 150) is protected from wear due to the movement of the wheel suspension under load. Load scanning element (150) according to any one of claims 1-3, wherein the load scanning element (150) is arranged to supply load only in the vertical plane of the vehicle. A method (300) in a calculation unit (200) in a vehicle (100), for determining vehicle weight of the vehicle (100), wherein the vehicle (100) has at least two wheel axles (130) and a chassis (110), and a a number of cargo scanning elements (150) according to any one of claims 1-4, wherein the method (300) is characterized by: collecting (301) a respective food value from the cargo scanning elements (150) in the vehicle (100); summing (303) the collected (301) food values; calculation (304) of the vehicle weight for the vehicle (100), based on the summed (303) food values, by converting these to a weight value, to which a constant corresponding to the weight of the vehicle on wheels, wheel axles (130) and suspension (140) is added . The method (300) of claim 5, further comprising: comparing (302) between collected (301) food values from load sensing elements (150) placed on different wheel axles (130) on the vehicle (100), and / or placed on right and left side of the vehicle (100), as well as triggering a load displacement warning for the driver if the difference between the equalized (302) values exceeds a second spruce value. A calculation unit (200) in a vehicle (100), for determining the vehicle weight of the vehicle (100), wherein the vehicle (100) has at least two wheel axles (130) and a chassis (110), and a number of load scanning elements ( 150) according to any one of claims 1-4, wherein the calculating unit (200) is characterized by: a communication module (410), arranged to receive signals representing a respective food value from all load scanning elements (150) in the vehicle (100); a processor (420), arranged to sum the collected food values, and also arranged to calculate the vehicle weight of the vehicle (100), based on the summed food values, by converting these to a weight value, to which a constant corresponding to the weight of the vehicle on wheels, wheel axles (130) and suspension (140) are added. The calculating unit (200) according to claim 7, wherein the processor (420) is also arranged to compare the collected food from load-sensing elements (150) placed on different wheel axles (130) on the vehicle (100), and / or placed on the right and left sides, respectively. of the vehicle (100), and trigger a load displacement warning for the driver, if the difference between the compared values exceeds a second spruce value. The calculating unit (200) according to any one of claims 7 or claim 8, further comprising a memory (425), arranged to store the constant corresponding to the weight of the vehicle on wheels, wheel axles (130) and suspension (140). A system (400) in a vehicle (100) for determining vehicle weight on the vehicle (100), wherein the vehicle (100) has at least two wheel axles (130) and a chassis (110), the system (400) comprising: load sensing elements (150) according to any one of claims 1-4; and calculation unit (200) according to any one of claims 7-9. The system (400) of claim 10, further comprising protective caps (160) arranged to be placed between at least certain load sensing elements (150) according to any one of claims 1-4 and the wheel suspension (140) such that the load sensing element (150) is protected from wear as a result of the movement of the wheel suspension under load. 14 537 574 A computer program in a vehicle (100), wherein the vehicle (100) has at least two wheel axles (130) and a chassis (110), and a number of load sensing elements (150) according to any one of claims 1-4, for determining vehicle weight on a vehicle (100), according to a method (300) according to any one of claims 5-6, wherein the computer program is executed in a processor (420) in a computing unit (200) according to any one of claims 7-9. A vehicle (100) comprising a system (400) installed in the vehicle (100) according to any one of claims 10-11, arranged to perform a method (300) according to any one of claims 5-6 for determining vehicle weight on the vehicle (100) . 537 574 1 / 120-1