MXPA98001526A - Method to constitute a database to correct the departure of the load cell, and recipientepondera - Google Patents

Abstract

A suitable weighting vessel to prepare a database to correct the output of a load cell, and able to change the weight in the desired steps in an efficient and safe way, comparing with the conventional procedures that involve the use of weights and other tools The weighting container comprises a hollow body in the form of a box (61) for storing liquid, an injection gate (61c) formed in an upper part (61b) of the container body (61), a discharge gate (61f) in a lower part of the container body (61), and a scale (61e) formed in the lateral portion (61d) of the container body (61), and indicating a value corresponding to the amount of the liquid in the container, wherein at least the lateral portion (61d) of the container body (61), where the scale (61e) is formed, is made of a transparent or translucent member, such that the amount of liquid in the body of the container can be seen. recipient (6

Description

METHOD TO CONSTITUTE A DATABASE TO CORRECT THE OUTPUT OF THE LOAD CELL. AND WEIGHTED CONTAINER.

TECHNICAL FIELD The present invention relates to a method for constructing an output correction database that indicates the output characteristics of a plurality of load measuring detection devices, such as voltage gauge tensors, or the like, in the condition in which the detection devices are connected to a vehicle, such as a truck, or the like, in such a way that the database is used to calculate the correction values to correct the characteristics of the vehicle, or the like, where the loads imposed on the respective detection devices are changed according to the variations in the output characteristics of the detection devices and the structure of the vehicle, when the load of the vehicle is measured based on the sum of the outputs of the devices of detection, or similar. The present invention further relates to a weight container adapted for use with the database constructed by the above method.

ANTECEDENT TECHNIQUE The measurement of the load of a vehicle is mainly made for a large vehicle, such as a truck, etc., for example, for the purpose of preventing traffic accidents, such as rollover accidents caused by overload, etc., and to prevent the acceleration of the deterioration of the vehicle. In a conventional manner, the load measurement of a vehicle is performed in the condition that the vehicle, which is an object of the measurement, is placed on a platform weighting machine called "KANKAN" in Japanese. However, because large-scale equipment and a large installation space are required for measurement, the number of platform weight machines that are allowed to be installed in the space is limited, so that numbers can not be measured. vehicles. In addition, the cost of installing platform weighting machines increases. Accordingly, recently, a load measuring apparatus is provided which is mounted on the vehicle by itself to measure the load of the vehicle. In a conventional load measuring apparatus of the on-vehicle type, for example, load measuring sensing devices, such as strain gauge sensors, or the like, are designed to connect suitable compositions between the front, rear, left and right of the frames of the carrier and leaf springs in the form of a circular arc interposed between the opposite end portions left and right of the front and rear axes, in such a way that the load is measured based on the sum of the signals produced from the detection devices, respectively proportional to the loads imposed on the front, rear, left, and right detection devices. When the outputs of the respective detection devices are directly used for measuring the vehicle load by means of the aforementioned load measuring apparatus, the outputs of the detection devices may become values that do not correspond to the loads actually imposed on the vehicle. the respective detection devices, due to variations in the output characteristics of the detection devices, even in the case where the center of gravity of a baggage is located substantially in the center of a carrier, in such a way that the load of luggage or carrier is imposed uniformly on the respective detection devices. That is, there is a risk that the correct values of the baggage load placed on the carrier can not be obtained based on the sum of the outputs of the respective detection devices. In addition, the outputs of the detection devices also depend on the characteristics of the vehicle, defined according to the structure of the vehicle.

In the measurement of a load on a vehicle, by using this plurality of detection devices, it becomes necessary to correct the outputs of the detection devices in accordance with the individual output characteristics and the characteristics of the vehicle. As described above, the calculation of the correction values to correct the output characteristics of the respective detection devices, and the calculation of the output correction values of the respective detection devices according to the characteristics of the vehicle, is perform based on the calculation of coefficients to make the sum of the outputs of the respective detection devices according to a value corresponding to a known load value, in the condition in which the value of the load on the carrier is known. In a particular manner, the correction values corresponding to the output characteristics of the detection devices are calculated after the loaded state is adjusted, such that the center of gravity of the carrier in the loaded state becomes coincident with the center of gravity of the bearer in the state that is not loaded or loaded. Both the calculation of the output characteristics of the detection devices and the calculation of the output correction values of the detection devices, according to the characteristics of the vehicle, are made each time by an appropriate increase / decrease of the weight value of a weight on the carrier. That is, the calculation of the output correction values of the load measurement detection devices is equivalent to the calculation of the correction values or of the correction equations for the detection devices, based on a database constructed by calculating the changes in the output characteristics of the respective detection devices corresponding to the weight. Therefore, it is necessary to look for the outputs of the respective detection devices, to build the database, while gradually increasing / decreasing the load on the carrier, and as long as the load is always known by itself after the increase / decrease. decrease. Accordingly, in order to know the load by itself after increasing / decreasing, while the load of the carrier is increased / decreased gradually in the time of work of calculating the output correction values, it is considered that they are placed weights, such as balance weights, etc., each having a known mass value, on a single position or at a plurality of places on the carrier, such that the load is imposed uniformly on the detection devices, and the number of weights per site is also increased / decreased as long as the outputs of the detection devices have been measured and searched as data. However, because the balance weights to be used mounted on the carrier are large, both in weight and in external size, a conveyor device, such as a lift truck, crane, etc., should be used separately. , to carry the balance weights and increase / decrease the number of balance weights on the carrier. In accordance with the above, there is a disadvantage that not only an excess of labor and equipment is required, but it is also a dangerous job, such as the work of putting slings for the balance weights, which must be performed in the case of a crane. In addition, the weight by weight of the balance is previously determined, in such a way that the separation to increase / decrease the load is limited by the previously determined balance weight. A disadvantage arises, in that the change of the output of each detection device can not be calculated in a separation smaller than the weight of a balance weight, or different kinds of balance weights of different weight have to be prepared with the object to calculate the change of the output in a separation as small as possible.

Taking the above-mentioned circumstances into consideration, a first object of the present invention is to provide a method for constructing a database for correcting the outputs of a plurality of load measuring detection devices, such as voltage gauge sensors, etc. , to measure the load of a vehicle, in such a way that the database is used to calculate the correction values to correct the outputs of the detection devices according to the output characteristics of the detection devices and the characteristics of the vehicle, and in such a way that the database that indicates the output characteristics of the detection devices can be constructed by a simple workforce. A second object of the present invention is to provide a container of weight adapted to perform the method of construction of the database, in such a way that the weight can be changed in a desired arbitrary separation without requiring an excess of labor, of equipment such as balance weights, and any hazardous work.

DISCLOSURE OF THE INVENTION In order to achieve the first prior object, in accordance with the present invention as recited in claim 1, there is provided a method for constructing an output characteristic correction database, which indicates the characteristics of outputting a plurality of load measuring detection devices arranged in a vehicle, in the portions supporting a carrier of the vehicle, such that the database is used to calculate correction values to correct the outputs of the devices detection according to the characteristics of the vehicle, determined based on the variations in the output characteristic of the detection devices and the structure of the vehicle, which comprises the steps of: changing a quantity of a liquid contained in a container of weight placed on the carrier, to change in this way the weight of the container of weight that contains the liquid, while a value of the weight of the container of weight containing the known liquid is made; and collecting and storing at least one of the amount of the liquid and the weight of the container of weight, while it is related to the outputs of the detection devices, provided that the quantity of the liquid in the weight container is changed. In the above method for constructing a database for correcting the outputs of load measuring detection devices, according to the present invention, as described in claim 2, a plurality of the weight containers are placed at equal intervals along and across the carrier; and the outputs of the detection devices are collected and stored to relate to at least one of the quantities of the liquid in the containers of weight and the weight values of the containers of weight in a condition in which the weight values of the containers Weight containers are made equal to each other. In order to achieve the second prior object, according to the present invention as described in claim 3, the aforementioned weight container comprises: a container body configured as a hollow box, in such a way that a container can be deposited. liquid inside the body of the container; an injection inlet formed in an upper portion of the container body; a discharge outlet formed in a lower portion of the container body; and a scale formed on a side portion of the container body, to indicate a value corresponding to the amount of liquid deposited in the container body; wherein at least the side portion provided with the scale in the side portions of the container body, is formed of a transparent or semi-transparent member, such that the amount of liquid in the container body can be seen through the transparent member or semitransparent. In the previous weight container, according to the present invention as described in claim 4, rotating ball wheels are attached to at least three corner portions on a lower end of the container body, to thereby make the container movable. In the above weight container, according to the present invention as described in claim 5, shock absorbers are interposed between the corner portions of the container body and the bearing wheels, respectively, in such a way that the absorbent crashes can expand / contract to get close to / away from, a surface on the floor of the bearing wheels, and in such a way that the body of the container is forced to go away from the surface of the ground with respect to the wheels of bearings against the loads of the container body and the liquid in the container body. In the above weight container, according to the present invention as described in claim 6, the shock absorbers are contracted to bring the body of the container into contact with the surface of the floor when the amount of liquid in the body of the container it reaches a previously determined value, and where shrinkage limiting members are further provided, in such a way that the contraction of the shock absorbers is limited in the condition that the body of the container comes into contact with the surface of the floor. In the method for constructing a database for connecting the outputs of the charge measurement detecting devices according to the present invention, as described in claim 1, the known weight of the weight container containing the liquid in the weight container, increases / decreases, by increasing / decreasing the amount of liquid in the weight container. In accordance with the above, the weights imposed on the detection devices can be easily changed in an arbitrary separation, without requiring a problematic work of increasing / decreasing the balance weight, using a conveyor apparatus such as a lift truck, a crane, or similar, as in the conventional case where balance weights are used, and without the need to separately prepare different kinds of balance weights of different weight in advance. In accordance with the foregoing, the database that indicates the changes in the output characteristics of the detection devices corresponding to the changes in the weights imposed on the detection devices can be easily constructed. Further, in the method for constructing a database for correcting the outputs of the load measuring detection devices according to the present invention as described in claim 2, the weight balance imposed on the carrier is made uniform by the plurality of weight containers that have weights that are made equal to one another. According to the above, the changes of the weights in the output characteristics of the detection devices that contain the influence of the characteristics of the vehicle determined on the basis of the structure of the vehicle, can be easily collected, and can be stored in the form of a database. Further, in the weight container according to the present invention as described in claim 3, the amount of liquid deposited in a box-shaped container body, can be easily confirmed by means of the scale provided in a side portion. of the body of the container. In addition, by confirming the weight of the container body itself, and the specific gravity of the liquid in advance, the weight of the entire container body can be easily calculated based on the amount of liquid in the container body observed by the container. middle of the scale. Also, by making the body of the container empty, the weight container can be carried only with the light weight of the weight container by itself. The weight container can be safely transported without the use of a conveyor device, such as a lift truck, a crane, or the like, unlike the conventional case where balance weights are used. In addition, the increase / decrease in the weight of the weight container can be easily realized by injecting the liquid into the body of the container, through the injection port, and discharging the liquid from the container body through the container. the discharge output. Further, in the weight container according to the present invention as described in claim 4, by providing bearing wheels at least in three corner portions for rotating on a lower end of the container body, the container body can be move easily so as not to get up off the ground surface. Furthermore, in the weight container according to the present invention described in claim 5, the body of the container reaches away from the ground surface of the bearing wheels by the force of the shock absorbers. In accordance with the above, carrying the weight container can be carried out easily by means of the rotation of the bearing wheels. In addition, in the weight container according to the present invention as described in claim 6, by causing the quantity of the liquid in the body of the container to reach a predetermined value in order to cause the shock absorbers to contract, the body of the container is placed in contact with the surface of the soil. In accordance with the above, if the weight of the weight container is increased to some degree, the weight container can be fixed by contacting the body of the container with the surface of the floor. In addition, the contraction of the shock absorbers is limited by the limiting contraction members in this condition. Accordingly, the shock absorbers are prevented from wearing out and damaging in the state of continuous contraction due to continuous overload reception.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view of a weight container in accordance with one embodiment of the present invention. Figures 2 (a) and 2 (b) are explanation views of a bearing wheel portion of the weight container illustrated in Figure 1; Figure 2 (a) shows an empty state in the weight container, and Figure 2 (b) shows a state where a predetermined amount of water is deposited in the weight container. Figure 3 is an explanation view showing an example of a modified configuration of the bearing wheel illustrated in Figures 2 (a) -2 (b). Figure 4 is an explanatory view showing a method for constructing a database with respect to the output characteristics of charge measuring detection devices, using a plurality of weight containers. Figures 5 (a) and 5 (b) are side and plan explanation views, respectively, showing the locations of a vehicle where the load measurement detection devices having outputs corrected according to the values are arranged. of correction obtained on the basis of the database constructed by the method of Figure 4. Figure 6 is a perspective view separated into parts of a structure wherein the leaf springs illustrated in Figures 5 (a) and 5 ( b) they are supported on carrier frames of a vehicle. Figure 7 is a sectional view showing a detection device provided on a fork bolt illustrated in Figure 6. Figure 8 is a circuit diagram, partially in block, showing the configuration of the detection device illustrated in the Figure 7. Figure 9 is a front view of a load meter for calculating the load of a vehicle based on the outputs of the respective detection devices illustrated in Figure 7.

Figure 10 is a block diagram showing the hardware configuration of a microcomputer illustrated in Figure 9.

BEST MODE FOR CARRYING OUT THE INVENTION A mode of the present invention will be described below with reference to Figures 1 to 10. First, referring to Figures 5 (a) and 5 (b), a description will be made of the locations in a vehicle where the detection devices of a load measuring apparatus, which is an object of construction of an output correction database, are arranged by the use of weight containers according to one embodiment of the present invention. invention. Figure 5 (a) is a side view of a vehicle, and Figure 5 (b) is a plan view of the vehicle. The vehicle 1 has the wheels 3, the carrying frames 5, and a carrier 7. The wheels 3 are provided in six in total, in the front, middle, and rear portions, on the left and right sides, respectively. The front, middle, and rear wheel pairs are supported by the front, middle, and rear axes 9, respectively, at their widthwise or laterally opposite ends, respectively. The carrier 7 is supported on the carrier frames 5. Front, middle, and rear pairs of positions are supported, spaced on the left and right sides at a distance on the frames of the carrier 5, through the leaf springs 11, by pairs of left and right end positions of the respective front, middle, and rear axes 9. As shown in Figure 6, which is a perspective view separated into parts of a structure for causing the frames of the carrier to support the leaf springs 11 of Figures 5 (a) and 5 (b), each of the leaf springs 11 are formed of strip type spring sheets which are placed one above the other, to form substantially as a substantially circular arc curved convexly towards the ground. The opposite longitudinal ends of the leaf spring 11 are supported by two clamps 13 joined on the frame of the carrier 5 in the front and rear positions spaced at a distance. In a particular way, the rear end portion of the leaf spring 11, on the rear side of the vehicle 1, is supported by a fork 15 interposed between the clamp 13 and the leaf spring 11, in order to be able to oscillate with respect to the clamp 13. In the Figure 6, the reference numeral 17 designates a fork pin (corresponding to the "portions supporting a vehicle carrier" in the claim), which connects the clamp 13 and the fork 15 with one another, so as to be able to oscillate . In the vehicle 1 configured as described above, load measuring detection devices 21 (corresponding to the "sensors" are arranged in six fork bolts 17, which are arranged in the pairs of front, middle, and rear locations, on the left and right sides of the vehicle 1, to connect the clamps 13 and the forks 15 to each other In this embodiment, each of the detection devices 21 is constituted by a magnetostriction type meter sensor. Figure 7, which is a sectional view showing a detection device provided in the fork pin illustrated in Figure 6, the detection device 21 is connected to a fabric 19a of a retaining member 19 received in a hole 17a formed along the axial direction from one end of the fork bolt 17. Incidentally, in the case where the detection device 21 is of a magnetostricci type The detection device 21 is fitted in a receiving hole (not shown) formed in the tissue 19a. Each of the six detection devices 21 respectively disposed on the fork bolts 17 located at the front, middle, and rear locations on the left and right sides, is constituted by a sensor 23, and a frequency conversion portion at frequency (hereinafter referred to as the V / F conversion portion) 25, as shown in Figure 8, which is a block diagram of the detection device 21. The sensor 23 is constituted by a magnetrostriction element 23a, and a transformer 23b that uses the magnetostriction element 23a as a magnetic circuit. The V / F conversion portion 25 has an oscillator 25a connected to a primary coil of the transformer 23b, a detector 25b connected to a secondary coil of the transformer 23b, and a V / F conversion circuit 25c connected to the detector 25b. The detection device 21 is configured to make a current flow to the primary coil of the transformer 23b, based on the output signal of the oscillator 25a, to thereby induce an alternating current voltage in the secondary coil of the transformer 23b, cause the detector 25b to convert the alternating current voltage into a direct current voltage, and make the V / F conversion circuit 25c converts the direct current voltage into a pulse signal of a frequency proportional to the value of the direct current voltage at the output of the pulse signal to the outside. Incidentally, a resistor 25d having a high resistance value is connected between the oscillator 25a and the primary coil of the transformer 23b. The alternating current voltage value induced in the primary coil of the transformer 23b can not be changed by the resistor 25d, even in the case where the output signal of the oscillator 25a changes more or less. In addition, the conversion of the alternating current voltage, induced in the secondary coil of the transformer 23b, to the direct current voltage by the detector 25b, is realized by the multiplication of alternating current voltage by a voltage generated between the opposite ends of the resistor. 25d, such that the noise components contained in the alternating current voltage are reduced by detection based on multiplication. Furthermore, in the detection device 21, the permeability of the magnetostriction element 23a changes correspondingly with the load imposed on the magnetostriction element 23a. As a result, the alternating current voltage induced in the secondary coil of the transformer 23b changes correspondingly with the output signal of the oscillator 25a, such that it changes the frequency of the pulse signal produced from the V / F conversion circuit. 25c. The detection of load of a single side of the vehicle 1, and the measurement of load based on the outputs of the respective detection devices 21 arranged on the fork bolts 17, at the front, middle, and rear locations, on the sides left and right, are made by a microcomputer 33 arranged in a charge meter 31 shown in Figure 9, which is a front view thereof. On the front surface 31a of the charge meter 31, a charge indication portion 37 is provided which is constituted, for example, by a group of 7-segment light-emitting diodes, to indicate the charge measured by the microcomputer 33, three charging indication lamps 40a to 40c, to indicate a left-side state, a uniform state, and a right-side state, respectively, an overload indication lamp 41 to indicate the fact that the measured load exceeds a value previously determined maximum load, an alarm bell 43 for reporting a one-sided state of charge and an overload state, a set-value set-compensation key 45, an over-value setting key 47, ten keys 53, a reset key 54, and an establishment key 55. As shown in Figure 10, the microcomputer 33 is constituted by a central processing unit (CPU) 33a, a memory a direct access (RAM) 33b, and a read-only memory (ROM) 33c.

A non-volatile memory (NVM) 35, to prevent the stored data from disappearing, even in the case where an electrical supply is deactivated; and the compensation setting value setting key 45, the overload value setting key 47, the ten keys 53, the reset key 54, and the set key 55, are connected directly to the central processing unit 33a. In addition, the respective detection devices 21, and an execution sensor 57, for generating the execution impulses corresponding to the execution of the vehicle 1, are connected to the central processing unit 33a through an input interface 33b. In addition, the charge indication 37, the state charge indication lamps on the left side, uniform state, and state of the right side 40a to 40c, the overload indication lamp 41, and the alarm bell 43, are connected to the central processing unit 33a, through an output interface 33e. The direct access memory 33b has a data area for storing different kinds of data, and a work area for different kinds of processing. The control programs for making the central processing unit 33a perform different kinds of operations are stored in the read-only memory 33c. In the non-volatile memory 35, the tables of the compensation adjustment values and the characteristic correction values for the respective output pulse signals of the detection devices 21, the weighting coefficients ql to q3 are stored in advance. axes 9, used to calculate the load values of one side of the vehicle (unit:%), which will be described later, and which indicates the magnitude and direction of the deviation of the load imposed on the vehicle, a table of values of gain correction for the sum of the frequencies of the output pulse signals of the detection devices 21 after the compensation adjustment and the characteristic correction, load conversion equations, overload values, and values for judging the deviation Load in the left and right directions. Adjustment values are provided in the compensation setting value table, to eliminate variations in the frequency of the output pulse signals of the six detection devices 21 in the vehicle's condition 1. The adjustment values are set for the detection devices 21, respectively, by means of an establishment process in the condition of the vehicle 1. Each one of the adjustment values for the detection devices 21 is a difference (unit; Hz) between the frequency of the output pulse signal of the detection device 21 in the cut condition, and the reference frequency of 200 Hz of the pulse signal at the time when the load is 0 tonnes. The specific scale of the adjustment value is between +170 Hz and -500 Hz. In accordance with the foregoing, each of the detection devices 21, which can be adjusted with compensation, by means of the adjustment values, respectively, is set in such a manner that the frequency of the output pulse signal in the cut state is on a scale of 30 Hz to 700 Hz. Characteristic correction values are provided in the table of characteristic correction values, to correct for variations in the characteristic of detection devices 21, which refers to the correlation between charges imposed on the detection devices 21 and the output pulse signals of the detection devices 21. The characteristic correction values are respectively set for the detection devices 21 in the stage before the detection devices are arranged 21 on the respective fork bolts 17. Each of the characteristic correction values for the devices Detection values 21, is a correction coefficient, by which the frequency of the output pulse signal of the detection device 21 is multiplied, in such a way that the inclination of a line indicating the correlation between the load imposed on the detection device 21 and the output pulse signal of the detection device 21, is coincident with the inclination of a line indicating the reference characteristic. In the case where the detection device 21 has a non-linear characteristic, in such a way that the characteristic of the impulse signal changes from one characteristic to another characteristic corresponding to the frequency band of the output pulse signal, a plurality of characteristic correction values, to be applied to the frequency bands between the adjacent turning points, for a detection device 21. The weighting coefficients ql and q3 peculiar to the respective axes 9, are provided to give weight, correspondingly with the proportions of load distributed to the respective axes 9, with the values of load of deviation established from the wheel pl to p3 (unit:%), which will be described later, which indicate the magnitude and the direction of the lateral deviation of the loads imposed on the respective axes 9, and which are calculated based on the frequencies of the pulse signals d e output of detection output devices 21 after compensation adjustment and characteristic correction. The weighting coefficients ql to q3 are set correspondingly with the structure of the vehicle 1 in advance. In this embodiment, the weight coefficient ql of the front axis 9 is set to 0.1, the weighting coefficient q2 of the middle axis 9 is set to 0.2, and the weighting coefficient q3 of the rear axis 9 is set to 0.7. The gain correction value table in the area of the gain correction value table is provided to correct the outputs of the detection devices 21, in order to adjust the gains of the detection devices 21 correspondingly with the error between the sum of the frequencies of the actual output pulse signals of the six detection devices 21, and the sum of the frequencies of the output pulse signals originally expected of the detection devices 21, in accordance with the loads imposed on the six detection devices 21. In addition, first to sixth correction values Zl to Z6 are stored in the gain correction value table in such a way that one of the six correction values Z1 through Z6 in one of the six correction values is suitably selected. basis to the combination of the state of deviation of the load imposed on the vehicle 1, with respect to which state laterally deviated (across the width) the load arrived, between the deviation of the left side, no deviation, and the deviation of the right side, and the execution status of the vehicle 1, with respect to whether the vehicle 1 has been executed or not after the load measurement is previously made. The first, third, and fifth correction values Zl, Z3, and Z5, are calculated as follows. Before the vehicle 1 is made to work, weights (not shown) of known weight values are placed successively on the positions where the loads on the respective detection devices 21 are imposed uniformly on the carrier 7, in the positions where they are uniformly imposed. the charges are imposed on the respective detection devices 21 in the state of the left side, and in the positions where the charges are imposed on the respective detection devices 21 in the state of the right side. The sum of the frequencies of the output pulse signals of the respective detection devices 21, is measured in each of the load-mounting states, and then the first, third, and fifth correction values Zl are respectively calculated, Z3, and Z5, in such a way that the sum values thus obtained in each load-mounting state, are divided by the sum of the frequencies of the output pulse signals originally expected from the respective detection devices 21, correspondingly with the weight values of the weights. The second, fourth, and sixth correction values Z2, Z4, and Z6, are calculated as follows. Before the vehicle 1 is made to work, weights (not shown) of known weight values are placed, successively in the positions where the loads are uniformly imposed on the respective detection devices 21 on the carrier 7, at the positions in where the charges are imposed on the respective detection devices 21 in the state of the left side, and where the positions where the loads are imposed on the respective detection devices 21 in the state of the right side. After the vehicle 1 is operated in this state, and then stopped, the sum of the frequencies of the output pulse signals of the respective detection devices 21 in each of the load-mounting states is measured, and then the second, fourth, and sixth correction values Z2, Z4, and Z6 are calculated, respectively, in such a way that the values of the sum thus obtained in each load-mounting state are divided by the sum of the frequencies. of the output pulse signals originally expected from the respective detection devices 21, correspondingly with the weight values of the weights of the frequencies of the output pulse signals of the respective detection devices 21 which are measured in each of the respective positions where the known weight is placed. The first, third, and fifth correction values Zl, Z3, and Z5 are respectively calculated in such a way that the values of the sum thus obtained in different positions are divided by the sum of the frequencies of the pulse signals of output originally expected from the respective detection devices 21, according to the weight values of the weights. The work of building the database with respect to the output characteristics of the detection devices 21 used to calculate the characteristic correction values in the characteristic correction values table, and the first to sixth correction values Zl a Z6, will be described below with reference to Figures 1 to 4. Figure 1 is a perspective view of a water injection tank type weight container used as the aforementioned weight, in accordance with one embodiment of the invention. present invention. In Figure 1, the weight container 60 in this mode, has a container body 61 configured as a hollow box, bearing wheels 63 attached to four corners of the lower portion of the container body 61. The container body 61 is formed of, for example, a plastic film reinforced with resin transparent, semi-transparent resin, or similar, in such a way that you can see inside. The concave portions 61a (corresponding to the "corner portions of the container body" in the claims), each of which has a size such that a corresponding bearing wheel 63 can be received, are formed in the four portions of lower corner where the bearing wheels 63 are joined. In addition, a water injection gate is formed 61c (corresponding to the "injection entry" in the claims) substantially in the central position of an upper surface 61b (corresponding to an upper portion of the container body) of the container body 61, such that it can be injected water inside the container body 61. A scale 6le is formed, which indicates the amount of water injected and deposited inside the container body 61, on a side 6Id of the container body 61 (corresponding to the "portion"). side of the container body "in the claim). A drainage flap 61f (corresponding to the "discharge outlet" in the claims) is formed to discharge water from the interior of the container body 61, at a position below the scale 61e, and onto the lateral surface 61d of the container. container body 61. As the occasion demands, a water plug (not shown) is suitably attached, for example, to form a soft rubber that also serves as a water-sealing material, to the drain gate 61f. Incidentally, the lower portion of the container body 61, which contains at least the concave portions 61a, is formed with a hardness such that the rectangular shape can be maintained as shown in Figure 1, regardless of the water reservoir in the body of the container. In addition, it is a matter of routine that the shape of the container body 61 is not limited to the box shape of this embodiment, as shown in Figure 1, and any shape, such as a columnar shape, can be used. , a form of stock market in indefinite format, etcetera. In addition, the size of the container body 61 is preferably formed in such a way that the weight of the body of weight 60 takes a uniform value, such as a ton, or the like, when the body of the container 61 is filled with water. As shown in Figure 2 (a), each of the bearing wheels 63 is configured in such a way that an open tube-shaped receiving member 63b is integrally formed upward in the upper portion of a frame 63a of the bearing wheel 63. A shock absorber 65 is constituted by a coiled spring 63c received in the receiving member 63b, and an arrow 61h projecting from an inner surface 61g of the concave portion 61a of the container body 61, and having one end front inserted in the coiled spring 63c. As shown in Figure 2 (a), the shock absorber 65 is configured in such a way that a gap H is formed between the upper end of the receiving member 63b, and the lower surface 61g of the concave portion 61a, by means of the elastic force of the coiled spring 63c, to thereby separate a bottom surface 61j from the container body 61 upwards, away from the floor surface G of the bearing wheel 63, because the hollow H is in the condition wherein the body of the container 61 is empty of water. On the other hand, as shown in Figure 2 (b), the shock absorber 65 is configured in such a way that the arrow 61h is inserted in the receiving member 63b against the spring force of the coiled spring 63c, by the weight of the water contained within the interior of the container body 61, to thereby carry the bottom surface 61g of the concave portion 61a to a contact with the upper end of the receiving member 63b, and to bring the bottom surface 61j of the container body 61 in contact with the ground surface G of the bearing wheel 63, in the condition in which a quantity of water not less than a previously determined value is deposited, in the body of the container 61. In the shock absorber 65 shown in FIG. Figures 2 (a) and 2 (b), the receiving member 63b corresponds to a contraction limiting member. As shown in Figure 3, the shock absorber 65 can be configured in such a way that a receiving member in the form of a tube 61k open downwards is attached., with the bottom surface 61g of the concave portion 61a, such that the coiled spring 63c is received inside the receiving member 61k, and an arrow 63d projected from the upper end of the frame 63a of the bearing wheel is inserted. 63, in the coiled spring 63c. In Figure 3, the reference numeral 63e designates a flange projected from the outer circumference of the arrow 63d, in order to receive the coiled spring 63c. In the shock absorber 65 shown in Figure 3, the receiving member 61k and the flange 63e correspond to the contraction limiting member. The procedure for constructing the database with respect to the output characteristics of the detection devices 21, by using a plurality of weight containers 60, as defined above, will be described below with reference to Figure 4. As shown in Figure 4, ten weight containers 60 are assembled in the form of a matrix of two lines and five columns, at equal intervals both widthwise and lengthwise, and are placed on the carrier 7 of the vehicle 1 .

A water supply pump 70 and a water tank 80 are arranged on one side of the vehicle 1. Each weight container 60 and the water supply pump 70 are connected to each other by means of two hoses 71, 71 shown by a line in Figure 4. A hose 71 connects the drain gate 71f of the container body 61, of the weight container 60, with a water suction gate (not shown) of the water supply pump 70, and the other hose 71 connects the water injection gate 61c of the container body 61, with a water outlet (not shown) of a drain pump 70. Incidentally, the gap between the outer circumference of the hose 71 connected to the gate of drain 60f of the weight container 60, and the inner circumference of the drain gate 61f, is sealed by a water sealing member not shown, so as to prevent leakage of water. In this condition, water is supplied from the water supply tank 80 to the weight containers 60, or water is discharged from the weight containers 60 to the water supply tank 80, by the water supply pump 70, to increase / decrease in this way the quantities of water in the container bodies 61, of the weight containers 60, step by step, by a predetermined value, while the quantities of water are made equal to each other. The frequencies of the output signals of the detection devices 21 in each step, and the weight of each container of weight 60, or the amount of water in each container of weight 60, at that time, are searched in the computer, not shown This data is stored in an external or internal storage medium. As a result, the database is constructed with respect to the output characteristics of the detection devices 21. Although the above description has been made about the case where the quantities of water in the container bodies 61 are increased / decreased the weight containers 60, by means of the water supply pump 70, the present invention can also be applied to the case where the quantities of water are increased / decreased manually, without the water supply pump 70, while the respective scales 61e of the weight containers 60. Taking into consideration the differences between the output frequencies of the detection devices 21 in the respective amounts of water in the database. The arrangement of the detection devices 21, etc., calculate the characteristic correction values for the respective detection devices 21, and the first to sixth correction values Zl to Z6, by means of the computer, based on the equations calculation of correction value previously determined. The correction values thus calculated are stored in the non-volatile memory 35 of the load meter 31. Although the above description has been made about the case where the processing work to build the database and to calculate the correction values of feature, and the first to sixth correction values Zl to Z6 can be performed by the computer not shown, the present invention can also be applied to the case where the necessary programs are stored in the read-only memory 33c of the load meter 31 , to operate the central processing unit 33a based on the programs, in such a way that the processing work can be performed by the microcomputer 33. In the weight container 60 configured as described above in this embodiment, the weight of the container of weight 60 can be adjusted to an arbitrary value when adjusting the amount of water deposited in the body of the container 61. In addition, only By adjusting the amount of water, the weight of the container of weight 60 can be increased / decreased in a delicate separation. Although the bearing wheels 63 attached to the four lower corners of the container body 61 can be omitted, the bearing wheels 63 work as follows, if the bearing wheels 63 are joined to the four lower corners of the container body 61. When the weight container 60 is placed or removed, the container body can be emptied of water 61, in such a way that the weight of the weight container 60 is lightened. Also, when the bearing wheels 63 are rotated in the condition that the bottom surface 61j of the container body 61 is separated upwardly from the floor surface G of the bearing wheels 63 by the shock absorber 65, the weight container 60 can be easily moved without special equipment and without hazardous work. Furthermore, in this configuration, when a quantity of water not less than a predetermined value is deposited in the body of the container 61, the coiled spring 63c of the shock absorber 65 is contracted by the weight of the weight container 60, which is the sum of the weight of the container body 61 and the weight of the water inside the container body 61, such that the bottom surface 61j of the container body 61 is brought to a close contact with the floor surface G of the wheels of the container 61. bearings 63 that can be omitted or replaced by wheel stops, or the like, attached to / separated from, the bearing wheels 63. In the aforementioned configuration, when the weight of the container 60 becomes heavy to some degree, the container weight 60 can be fixed on the floor surface G of the carrier 7, or the like. Further, because the bottom surfaces 61g of the concave portions 61a are brought to close contact with the upper ends of the receiving members 63b, respectively, in this condition, the reaction force received in the shock absorber 65 from the floor surface G, can be dispersed to, and received by, the entire body of the container 61. Accordingly, it can be prevented that the reaction force (load) is concentrated in one place to damage the container of weight 60. , etc. In addition, the shock absorber 65 itself can also be omitted. However, by providing the shock absorber 65, the load imposed on the support shaft of the bearing wheel 63 can be relaxed by the elastic force of the coiled spring 63c. Although the specific description about the correction process of the outputs of the detection devices 21 is omitted using the aforementioned database, and using the characteristic correction values and the first to sixth correction values Zl to Z6 calculated on the basis of to the database, and the specific description about the calculation of the load based on the outputs of the detection devices 21 corrected by the aforementioned correction process.

The details of these processes may follow the content preliminarily described in the load calculation apparatus according to Japanese Patent Number JP-A-7-58899 proposed by this applicant. Although this embodiment has been described on the case where a scale 61e and a drain gate 61f are formed on a lateral surface 61d of each container body 61, the present invention can also be applied to the case where a scale 61e is formed. and a drainage gate 61f on two sides, respectively, or a plurality of ladders 6le and a plurality of drainage gates 61f are formed on two or more side surfaces, or no scale is provided. Although this embodiment has been described about the case where the bearing wheels 63 are attached to, and disposed in, the four lower corners of the container body 61 through the impact absorbers 65, the present invention can also be applied. to the case where the shock absorbers 65 are omitted, or both the shock absorbers 65 and the bearing wheels 63 are omitted. Although this embodiment has been described about the case where the entire body of the container 61 is formed from transparent resin or semitransparent resin, so that it can be seen inside the body of the container 61, the present invention can also be applied to the case where, for example, only the side 61d having the scale 61e and its vicinity, is they form of transparent resin or of semi-transparent resin, in such a way that the inside of the body of the container 61 can be seen, while the other sides 61d are formed of opaque resin, so that they can not be It is possible to see the interior of the container body 61. Although this embodiment has been described about the case where the gain adjustment correction values Zl to Z6 are provided separate from the characteristic correction values, the present invention can also be applied. to the case where these values are collected as a kind of correction values, such that the weight containers 60 are used when the database is constructed for the calculation of correction values collected in a class. In this case, if the characteristics of the detection devices 21 change correspondingly with the frequency bands of the output pulse signals of the detection devices 21, the gain adjustment correction values Z1 through Z6 can be set to different values corresponding to the frequency bands, as the occasion demands. Although this embodiment has demonstrated the case where the detection devices 21 are arranged in the respective fork bolts 17, it is a matter of routine that the locations of the detection devices 21 are not limited to the positions shown in this embodiment, but which are freely selected only so that the sensing devices 21 are arranged in steering wheel spindles (in the case of steering wheels), or in the portions of the vehicle 1 where the load from the carrier 7 is imposed on the wheel 3 Although this embodiment has been described about the case where six detection devices 21 are provided, because the number of wheels 3 is six, and the number of axes 9 is three, that is, the front axes are provided. medium, and subsequent, it is a matter of routine that the present invention can also be applied to a vehicle where the number of wheels is not six, for example, four wheels are provided 3 and two axes 9, etc., provided that the number of detection devices 21 corresponds to the number of the wheels. Although this embodiment has been described about the case where magnetrostriction type detection devices 21 are used as the sensors, the present invention can also be applied to the case where weight measurement sensors having another configuration are used. further, the object of the gain adjustment according to the load deviation, or the fact on the vehicle 1 has worked or not before the load measurement, is not limited to the frequencies of the output pulse signals of the devices of detection 21 as described above in this embodiment. Other values can be used as the object according to the difference in the configuration of the sensors, such as voltage level, current level, weight value after weight conversion, and so on. The liquid deposited in the container body 61 of the weight container 60 is not limited to water, as described above in this embodiment, and any liquid of a specific gravity higher or lower than that of water can be used, such as the liquid Provided the specific gravity of the liquid is known, the weight of the liquid can be calculated on the basis of the amount of liquid deposited recognized by the scale 61e, so that the total weight of the container of weight 61 can be handled based on the sum of the weight of the container of weight 61 and the weight of the liquid.

INDUSTRIAL UTILITY As described above, in accordance with the present invention as described in claim 1, there is provided a method for constructing an output characteristic correction database, which indicates the output characteristics of a plurality of output devices. load measurement detection arranged in a vehicle in the portions supporting a carrier of the vehicle, such that the database is to be used to calculate the correction values to correct the outputs of the detection devices according to the characteristics of the vehicle, determined based on the variations in the output characteristic of the detection devices and a structure of the vehicle, which comprises the steps of: changing a quantity of a liquid contained in a weight container placed on the carrier, to change in this way the weight of the container of weight that contains the liquid, while so that a weight value of the weight container containing the known liquid is made; and collecting and storing at least one of the amount of the liquid and the weight of the container of weight, while it is related to the outputs of the detection devices, whenever the quantity of the liquid in the container of weight changes. Accordingly, the known weight of the weight container containing the liquid in the weight container is increased / decreased by increasing / decreasing the amount of liquid in the weight container. In accordance with the above, the weights imposed on the detection devices can be easily changed in an arbitrary separation, without requiring any work of increasing / decreasing the weight of the problematic balance, using a conveyor apparatus such as a lift truck, a crane, or similar, as in the conventional case where balance weights are used, and without the need to separately prepare different kinds of balance weights of different weight in advance. In accordance with the foregoing, the database that indicates the changes of the output characteristics of the detection devices corresponding to the changes in the weights imposed on the detection devices, can be easily constructed. In the above method for constructing a database for correcting the outputs of load measuring detection devices, according to the present invention as described in claim 2, a plurality of weight containers are placed at equal intervals to long and wide on the carrier; and the outputs of the detection devices are collected and stored, to relate to at least one of the quantities of liquid in the containers of weight, and the weight values of the containers of weight, in a condition in which the values of Weight of the weight containers are made equal to each other. Accordingly, the balance of the weight imposed on the carrier is made uniform by the plurality of weight containers, which have weights matched to each other, and the changes of the weights in the output characteristics of the detection devices can be easily collected. They contain the influence of the characteristics of the vehicle determined on the basis of the structure of the vehicle, and are stored in the form of a database.

Furthermore, according to the present invention as described in claim 3, the aforementioned weight container comprises: a container body configured as a hollow box, in such a way that a liquid can be deposited inside the body of the container; an injection inlet formed in an upper portion of the container body; a discharge outlet formed in a lower portion of the container body; and a scale formed on a side portion of the container body, to indicate a value corresponding to the amount of liquid deposited in the container body; wherein at least the side portion provided on the scale in the side portions of the container body, is formed of a transparent or semi-transparent member, such that the amount of liquid in the container body can be seen through the transparent member or semitransparent. Accordingly, the amount of liquid deposited in a box-shaped container body can be easily confirmed by means of the scale provided in a side portion of the container body. In addition, by confirming the weight of the container body itself, and the specific gravity of the liquid in advance, the weight of the entire container body can be easily calculated based on the amount of liquid observed in the container body. middle of the scale.

In addition, when emptying the body of the container, the weight container can be carried only with the light weight of the weight container by itself. The weight container can be carried safely without using a conveyor apparatus, such as a lift truck, crane, or the like, unlike the conventional case where scale weights are used. In addition, the increase / decrease in the weight of the container of weight, can be easily realized by injecting the liquid into the container body, through the injection port, and the liquid is discharged from the container body through the container. discharge output. In the above weight container, according to the present invention as described in claim 4, wheels of rotating bearings are attached to at least three corner portions on a lower end of the body of the container, to thereby make the container can be moved. Accordingly, by providing bearing wheels at at least three corner portions for rotating a lower end of the container body, the container body can be easily moved so as not to rise from the floor surface. In the above weight container, according to the present invention as described in claim 5, shock absorbers are interposed between the corner portions of the container body and the bearing wheels, respectively, in such a way that the absorbent Shock can be expanded / contracted to get close to / away from, a ground surface of the bearing wheels, and in such a way that the container body is forced to go away from the ground surface with respect to the bearing wheels , against the loads of the body of the container and the liquid in the body of the container. In accordance with the above, the transport of the weight container can be easily carried out by means of the rotation of the bearing wheels. In the above weight container, according to the present invention as described in claim 6, the shock absorbers are contracted to bring the container body into contact with the surface of the floor when the amount of liquid in the body of the container. The container reaches a previously determined value, and wherein the limiting members of contraction are also provided, in such a way that the contraction of the shock absorbers is limited in the condition in which the body of the container comes into contact with the surface of the floor . Accordingly, by causing the quantity of the liquid in the body of the container to reach a previously determined value, in order to cause the shock absorbers to contract, the body of the container comes into contact with the surface of the floor. According to the above, if the weight of the weight container is increased to some degree, the weight container can be fixed by contacting the body of the container with the surface of the floor. In addition, the contraction of the shock absorbers is limited by the contraction limiting members in this condition. Accordingly, the impact absorber is prevented from wearing out and damaging in the state of continuous contraction due to continuous overload reception.

Claims (6)

1. A method for constructing an output characteristic correction database, which indicates the output characteristics of a plurality of load measuring detection devices arranged in a vehicle, in the portions supporting a carrier of this vehicle, of Such a way that the database will be used to calculate the correction values to correct the outputs of the detection devices according to the characteristics of the vehicle, determined based on the variations in the output characteristics of the devices. detection and a structure of the vehicle, which comprises the steps of: changing a quantity of a liquid contained in a weight container placed on the carrier, in this way changing the weight of the container of weight that contains the liquid, while makes a weight value of the weight container that contains the known liquid; and collecting and storing at least one of the amount of the liquid and the weight of the container of weight, while it is related to the outputs of the detection devices, provided that the quantity of the liquid in the container of weight is changed.

2. A method for constructing a database for correcting the outputs of the charge measurement detecting devices according to claim 1, wherein: a plurality of the weight containers are placed at equal intervals along and width over the carrier; and the outputs of the detection devices are collected and stored to relate to at least one of the quantities of the liquid in the containers of weight and the weight values of the containers of weight in a condition in which the weight values of the Weight containers are made equal to each other.

3. A container of weight described in claim 1 or 2, which comprises: a container body configured as a hollow box, in such a way that a liquid can be deposited inside the body of the container; an injection inlet formed in an upper portion of the container body; a discharge outlet formed in a lower portion of the container body; and a scale formed on a side portion of the container body, to indicate a value corresponding to the amount of liquid deposited in the container body; wherein at least the side portion provided with the scale in the side portions of the container body, is formed of a transparent or semi-transparent member, such that the amount of liquid in the container body can be seen through the transparent member or semitransparent. A container of weight according to claim 3, wherein wheels of rotating bearings are attached to at least three corner portions on a lower end of the body of the container, to thereby make the container movable. A container of weight according to claim 4, wherein shock absorbers are interposed between the corner portions of the container body and the bearing wheels, respectively, in such a way that the impact absorbers can expand / contract for get close to / away from, a surface on the ground of the bearing wheels, and in such a way that the container body is forced to go away from the ground surface with respect to the bearing wheels against the body loads of the container and the liquid in the container body. A container of weight according to claim 5, wherein the shock absorbers are contracted to bring the body of the container into contact with the surface of the floor when the quantity of the liquid in the body of the container reaches a predetermined value, and wherein shrinkage limiting members are further provided, such that the shrinkage of the shock absorbers is limited in the condition that the container body comes into contact with the floor surface.