WO2017061613A1 - ミキサ車の積載量計量装置 - Google Patents
ミキサ車の積載量計量装置 Download PDFInfo
- Publication number
- WO2017061613A1 WO2017061613A1 PCT/JP2016/079977 JP2016079977W WO2017061613A1 WO 2017061613 A1 WO2017061613 A1 WO 2017061613A1 JP 2016079977 W JP2016079977 W JP 2016079977W WO 2017061613 A1 WO2017061613 A1 WO 2017061613A1
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- WIPO (PCT)
- Prior art keywords
- load
- drum
- vehicle body
- mixer
- mixer drum
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/42—Apparatus specially adapted for being mounted on vehicles with provision for mixing during transport
- B28C5/4203—Details; Accessories
- B28C5/4206—Control apparatus; Drive systems, e.g. coupled to the vehicle drive-system
- B28C5/422—Controlling or measuring devices
- B28C5/4224—Roll-over prevention
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
- B60P3/00—Vehicles adapted to transport, to carry or to comprise special loads or objects
- B60P3/16—Vehicles adapted to transport, to carry or to comprise special loads or objects for carrying mixed concrete, e.g. having rotatable drums
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/08—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for incorporation in vehicles
- G01G19/12—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for incorporation in vehicles having electrical weight-sensitive devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/01—Testing or calibrating of weighing apparatus
Definitions
- the present invention relates to a load capacity measuring device for a mixer truck.
- JP 9-193134A describes a mixer vehicle load weighing device equipped with a load cell installed in a front drum receiver and a load cell installed in each of a pair of left and right rear drum receivers.
- a method for obtaining the load of the mixer truck a method of adding the detection values of each load cell, a share of the load acting on the front drum receiving portion and the rear drum receiving portion, and the front drum receiving portion A method of estimating from a detected value of an installed load cell is disclosed.
- a load cell detects a load in a predetermined direction.
- the load cell detects a load in a direction perpendicular to the vehicle body, not in the vertical direction.
- the load direction detected by each load cell is not the vertical direction, and there is a possibility that the weighing accuracy of the load amount is lowered.
- the share of the load acting on the front drum receiving portion and the rear drum receiving portion is constant.
- the load sharing rate changes in accordance with the distribution state of the load in the drum, and the distribution state of the load changes depending on the inclination of the vehicle body, the rotation speed of the drum, the viscosity of the load, and the like. That is, when the load sharing rate is constant, the weighing accuracy of the load may be reduced.
- the present invention aims to improve the weighing accuracy of the load capacity of the mixer truck.
- a load-measuring device for a mixer truck that measures the load of a load in a drum rotatably mounted on a vehicle body supports the rear of the drum behind the vehicle body.
- a rear load detector provided at a rear drum receiving portion for detecting a load of the drum; at least one of a vehicle body state quantity indicating the state of the vehicle body and a drum state quantity indicating the state of the drum; and the rear load detector.
- a calculation unit that calculates a load amount of the load based on the detected value.
- FIG. 1 is a side view of a mixer truck including a load weighing device according to a first embodiment of the present invention.
- FIG. 2 is a sectional view of the mixer truck taken along line II-II in FIG.
- FIG. 3 is a cross-sectional view of the guide roller taken along line III-III in FIG.
- FIG. 4 is a block diagram of the load weighing device according to the first embodiment of the present invention.
- FIG. 5 is a circuit diagram of a load cell of the load weighing device according to the first embodiment of the present invention.
- FIG. 6 is a diagram for explaining the balance of forces acting on the mixer drum of the mixer truck.
- FIG. 7 is a graph showing the correlation between the calculated weight and the actual weight that change according to the inclination angle of the vehicle body.
- FIG. 1 is a side view of a mixer truck including a load weighing device according to a first embodiment of the present invention.
- FIG. 2 is a sectional view of the mixer truck taken along line II-II in
- FIG. 8 is a graph showing the correlation between the calculated weight and the actual weight that change in accordance with the rotational speed of the mixer drum.
- FIG. 9 is a graph showing the correlation between the calculated weight and the actual weight that change according to the slump value.
- FIG. 10 is a flowchart showing the calculation procedure of the weight measurement mode by the load weighing device according to the first embodiment of the present invention.
- FIG. 11 is a diagram for explaining the movement of the center of gravity of the load when the mixer drum rotates.
- FIG. 12 is a graph showing the correlation between the load difference per unit volume and the slump value.
- FIG. 13 is a flowchart showing the calculation procedure of the slump value estimation mode by the load weighing device according to the first embodiment of the present invention.
- FIG. 14 is a flowchart showing the calculation procedure of the vehicle body rollover determination mode by the load weighing device according to the first embodiment of the present invention.
- FIG. 15 is a block diagram of the load weighing device according to the second embodiment of the present invention.
- FIG. 16 is an enlarged view showing, in an enlarged manner, a front drum receiving portion of a mixer truck equipped with a load weighing device according to the second embodiment of the present invention.
- 17 is a cross-sectional view of the front drum receiving portion taken along line XVII-XVII in FIG.
- FIG. A mixer truck 1 shown in FIG. 1 is a vehicle that transports ready-mixed concrete (hereinafter referred to as “ready-con”) that is put into a mixer drum 10 in a concrete plant.
- the mixer truck 1 transports aggregates such as gravel and sand in addition to the ready-mixed concrete.
- ready-con ready-mixed concrete
- aggregates such as gravel and sand
- the mixer vehicle 1 includes a mixer drum 10 on which raw concrete is loaded, a driving device 20 that rotationally drives the mixer drum 10, a hopper 30 that supplies the raw drum to the mixer drum 10, and a chute 40 that guides the raw concrete discharged from the mixer drum 10 to a predetermined position. And comprising.
- the mixer drum 10 is a cylindrical member whose rear end is formed as an open end, and is rotatably mounted on the gantry 2a of the vehicle body 2.
- a driving shaft 10a extending along the rotation axis C1 of the mixer drum 10 is provided at the front end of the mixer drum 10, and an annular roller ring 10b is provided on the outer periphery of the rear portion of the mixer drum 10.
- the drive shaft 10a of the mixer drum 10 is connected to a hydraulic motor (not shown) provided in the drive device 20 disposed on the front side of the gantry 2a via a gear box (not shown).
- the mixer drum 10 is configured to rotate forward or backward by a hydraulic motor.
- the rear side of the mixer drum 10 is supported from below by a rear drum receiving portion 50 disposed behind the gantry 2a via a roller ring 10b.
- the front side of the mixer drum 10 is supported from below by a front drum receiving portion 60 disposed in front of the gantry 2 a via the drive device 20.
- the mixer drum 10 is disposed on the gantry 2a in a front-lowering posture in which the rear is lifted upward from the front.
- the mixer drum 10 supported in this way is shown in FIG. 1 as XY with the horizontal direction in the longitudinal direction of the vehicle body as the X axis and the vertical direction as the Y axis, and the virtual support point of the front drum receiving portion 60 as the origin O.
- the image is rotated about the X ′ axis of the X′-Y ′ coordinate system rotated by a predetermined angle (elevation angle ⁇ ) about the origin O. That is, the rotation axis C1 of the mixer drum 10 coincides with the X ′ axis.
- the elevation angle ⁇ is a predetermined rotation axis angle ⁇ 1.
- the elevation angle ⁇ has a magnitude obtained by adding or subtracting the tilt angle ⁇ to the rotation axis angle ⁇ 1.
- drum blades (not shown) are spirally arranged along the inner wall surface of the drum. A raw blade loaded in the mixer drum 10 is stirred by a drum blade that rotates together with the mixer drum 10.
- the drum blade moves the raw control in the mixer drum 10 forward while stirring.
- the drum blade moves the raw cooking container backward while stirring. In this way, by rotating the mixer drum 10 in the reverse direction, the raw concrete can be discharged from the opening end of the mixer drum 10.
- the raw concrete discharged from the mixer drum 10 is guided to a predetermined position via a chute 40 that is pivotably provided at the lower rear portion of the mixer vehicle 1.
- the mixer drum 10 is rotated forward at a higher speed than during stirring, so that the charged raw food can be quickly removed. Move forward.
- FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 1, and the structure inside the mixer drum 10 and below the rear drum receiving portion 50 is omitted.
- FIG. 3 is a sectional view taken along line III-III in FIG.
- the rear drum receiver 50 includes a first guide roller 51 that supports the right side of the mixer drum 10 as viewed from the rear side of the vehicle body 2 and a second guide roller 52 that supports the left side of the mixer drum 10. And are provided. Pin-type load cells 71 and 72 are incorporated in the guide rollers 51 and 52, respectively. The structure of the first guide roller 51 will be described with reference to FIG.
- the first guide roller 51 includes an annular roller 54 that contacts the roller ring 10b, a pin-type first load cell 71 that rotatably supports the roller 54, and an insertion hole through which the first load cell 71 is inserted without contacting. And a pair of support frames 55 formed with 55a.
- the pin that supports the roller 54 is constituted by the pin-type first load cell 71.
- the first load cell 71 is an elastic body formed in a columnar shape, and both end portions 71 b are fixed by a fixing member 56 fixed to the support frame 55, and a center portion 71 a is provided between the roller 54 and a rolling bearing 57. It is press-fitted and fixed to the inner ring.
- a strain generating portion 71c that generates strain due to a load acting on the first load cell 71 is provided.
- a strain gauge (not shown) is attached to the strain generating portion 71c, and an electric signal proportional to the load is output from the first load cell 71 by changing the resistance of the strain gauge according to the strain amount in the strain generating portion 71c. .
- the first guide roller 51 is arranged so that the axis C2 of the first load cell 71 and the rotation axis C1 of the mixer drum 10 are parallel to the mixer drum 10. For this reason, a load in the Y′-axis direction acts on the first load cell 71 as shown by a thick arrow in FIG. 3. That is, the first load cell 71 detects not the load in the vertical direction of the mixer drum 10 but the load on the mixer drum 10 in the Y′-axis direction perpendicular to the rotation axis C ⁇ b> 1 (X′-axis) of the mixer drum 10.
- the second guide roller 52 has the same structure as the first guide roller 51, and a pin-type second load cell 72 is incorporated in a pin that supports the roller 54. Similar to the first load cell 71, the second load cell 72 detects the load on the mixer drum 10 in the Y′-axis direction perpendicular to the rotation axis C ⁇ b> 1 of the mixer drum 10.
- FIG. 4 is a block diagram showing a schematic configuration of the load weighing device 100.
- FIG. 5 is a circuit diagram of the load cells 71 and 72.
- the load-measuring device 100 is provided in a rear drum receiving unit 50 that supports the rear of the mixer drum 10, and detects a rear load detection that detects the load of the mixer drum 10 in the Y′-axis direction perpendicular to the rotation axis C 1 of the mixer drum 10. Based on a pair of load cells 71 and 72, at least one of a vehicle body state quantity indicating the state of the mixer vehicle 1 and a drum state quantity indicating the state of the mixer drum 10, and detection values of the pair of load cells 71 and 72.
- a calculation unit 110 that calculates the loading amount of the raw control unit and a display unit 120 that displays a calculation result of the calculation unit 110 and the like are provided.
- the calculation unit 110 includes a memory (not shown) that stores a program, a map, an arithmetic expression, and the like for calculating a load amount, a CPU (not shown) that calculates a load amount according to the program, detection values of various sensors and load cells. And an input / output interface (not shown) that outputs a calculation result and the like to the display unit 120.
- the calculation unit 110 includes a determination unit 111 that compares a predetermined threshold with a calculation result.
- the calculation unit 110 receives the detection value of the inclination sensor 131 that detects the inclination angle in the front-rear direction with respect to the horizontal plane of the mixer vehicle 1 and the detection value of the mixer drum sensor 132 that detects the rotation speed and rotation position of the mixer drum 10. Is done. Further, the calculation unit 110 receives information such as the density and slump value of the live control input by the operator via the input unit 133, and other devices connected via the input / output interface, such as measurement values from the slump measurement device. Entered.
- the tilt sensor 131 is disposed on the gantry 2a, and the mixer drum sensor 132 (not shown) is provided in the driving device 20.
- the display unit 120 displays the results calculated by the calculation unit 110 such as the weight and slump value of the raw control and the risk of the vehicle body 2 rolling over. In addition, when the displayed content is dangerous, the display unit 120 notifies the operator of the content by changing the display color or generating an alarm sound. Thus, the display unit 120 not only displays the calculation result but also has a warning function.
- the calculation unit 110, the display unit 120, and the input unit 133 are arranged as one calculation display unit 150 in the cabin of the vehicle as shown in FIG.
- the input unit 133 may be integrated with the display unit 120 by providing a touch panel or the like on the display unit 120.
- the load cells 71 and 72 are the pin-type first load cell 71 and second load cell 72 incorporated as pins for supporting the roller 54 as described above.
- the 1st load cell 71 and the 2nd load cell 72 are connected to the calculating part 110 arrange
- a circuit switching unit 140 having a circuit for synthesizing the output of the first load cell 71 and the output of the second load cell 72 is provided in the load cell connection box 145.
- the output values of the first load cell 71 and the second load cell 72 combined in the circuit switching unit 140 are input to the arithmetic unit 110.
- the circuit switching unit 140 includes a changeover switch 141 that is switched between a first position and a second position.
- the changeover switch 141 When the changeover switch 141 is in the first position, the output of the first load cell 71 and the output of the second load cell 72 are the same.
- the first connection state (the state shown in FIG. 5) is connected with polarity and the changeover switch 141 is in the second position, the output of the first load cell 71 and the output of the second load cell 72 are connected with different polarities.
- the second connection state is established.
- the changeover switch 141 when the changeover switch 141 is in the first position, the positive pole of the first load cell 71 and the positive pole of the second load cell 72, the negative pole of the first load cell 71, and the negative pole of the second load cell 72, respectively.
- a value obtained by adding the output of the first load cell 71 and the output of the second load cell 72 is output to the arithmetic unit 110.
- the changeover switch 141 when the changeover switch 141 is in the second position, the positive pole of the first load cell 71 and the negative pole of the second load cell 72, the negative pole of the first load cell 71 and the positive pole of the second load cell 72 are connected, respectively.
- the difference between the output of the first load cell 71 and the output of the second load cell 72 is output to the computing unit 110. Switching of the changeover switch 141 is controlled by the arithmetic unit 110.
- FIG. 6 shows a balance of forces acting on the mixer drum 10 when the vehicle body 2 is horizontal.
- the supporting force of the rear drum receiving unit 50 is W1
- Wcos ⁇ W1 cos ⁇ + W2 cos ⁇ .
- the load cells 71 and 72 for detecting the load in the rear drum receiver 50 are attached so as to detect the load in the Y′-axis direction. Therefore, the sum of the output values of the pair of load cells 71 and 72 corresponds to W1 cos ⁇ .
- the elevation angle ⁇ is a magnitude obtained by adding or subtracting the inclination angle ⁇ to the rotation axis angle ⁇ 1. For this reason, the sum of the output values of the load cells 71 and 72 is W1 cos ( ⁇ 1 ⁇ ⁇ ).
- the inclination angle ⁇ is obtained by the inclination sensor 131, and since the rotation shaft angle ⁇ 1 is a preset value, the supporting force W1 of the rear drum receiving portion 50 is easily calculated.
- the weight of the mixer drum 10 is based on the supporting force W1 and the sharing ratio of the rear drum receiving unit 50. W can be calculated.
- the sharing ratio between the supporting force W1 of the rear drum receiving unit 50 and the supporting force W2 of the front drum receiving unit 60 is not constant, and changes according to the distribution state of the raw cooking unit in the mixer drum 10, that is, the center of gravity of the raw mixing unit.
- the calculated weight W of the mixer drum 10 is based on at least one of the drum state quantity indicating the state of the mixer drum 10 that affects the change in the gravity center position of the raw control and the vehicle body state quantity indicating the state of the vehicle body 2.
- the more accurate weight W of the mixer drum 10 is obtained.
- the drum state quantity the input amount of the raw concrete in the mixer drum 10, the rotation speed of the mixer drum 10, and the slump value (viscosity) of the raw concrete in the mixer drum 10 are used.
- An inclination angle ⁇ is used.
- the calculated weight Wcal calculated from the load detected by the rear drum receiving unit 50 on the assumption that the sharing rate is constant and the actual weight Wr are in a relationship indicated by a solid line in the graph of FIG. .
- the actual weight Wr is larger than the calculated weight Wcal calculated when the input amount is small. This is because when the input amount is small, the gravity center position of the raw control is separated from the rear drum receiving portion 50, and the ratio of the load acting on the rear drum receiving portion 50 to the entire load is reduced.
- the input amount of the raw control unit becomes the gravity center position of the raw control unit.
- the corrected weight Wcor of the mixer drum 10 that is compensated for the influence on the mixer drum 10 can be obtained.
- the conversion formula and the map are stored in the memory of the calculation unit 110 and are used when the correction weight Wcor of the mixer drum 10 is obtained.
- the position of the center of gravity of the fluid raw control loaded in the mixer drum 10 moves according to the inclination angle ⁇ of the vehicle.
- the center of gravity position of the raw control is moved forward than when the vehicle body 2 is horizontal, and the rear of the vehicle body 2 is lowered after the rear is lowered from the front.
- the gravity center position of the ready-mixer moves rearward than when the vehicle body 2 is horizontal.
- the sharing rate also changes. Therefore, if the weight W of the mixer drum 10 is calculated based on the assumption that the sharing rate is constant from the load detected by the rear drum receiving unit 50, An error occurs with respect to the weight Wr.
- the calculated weight Wcal, the inclination angle of the vehicle body 2 and the actual weight Wr calculated from the load detected by the rear drum receiver 50 on the assumption that the sharing ratio is constant are shown in the graph of FIG.
- the relationship is indicated by a broken line and a one-dot chain line.
- a broken line is a case where the vehicle body 2 is lowered forward, and an alternate long and short dash line is a case where the vehicle body 2 is lowered backward.
- the solid line indicates a case where the vehicle body 2 is not inclined and is in a horizontal state.
- the calculated weight Wcal is greater than the actual weight Wr when the vehicle body 2 is in the front lower direction (broken line) than in the case in which the vehicle body 2 is the rear lowering (dashed line). Less than. This is because, when the vehicle body 2 is in the front-lowering position, the gravity center position of the raw control is separated from the rear drum receiving portion 50, and the ratio of the load acting on the rear drum receiving portion 50 with respect to the entire load is reduced. Note that the inclination of the graph decreases as the vehicle body 2 tilts forward and decreases, and the inclination of the graph increases as the vehicle body 2 tilts backward and downward.
- the vehicle body 2 It is possible to obtain the corrected weight Wcor of the mixer drum 10 in which the influence of the inclination angle ⁇ on the center of gravity of the ready-mixed container is compensated.
- the conversion formula and the map are stored in the memory of the calculation unit 110 and are used when the correction weight Wcor of the mixer drum 10 is obtained. Note that the tilt angle ⁇ of the vehicle body 2 is detected by the tilt sensor 131 described above.
- the rotation speed of the mixer drum 10 is the rotation speed per unit time and means a so-called rotation speed.
- the raw concrete in the mixer drum 10 during the rotating rotation is pressed forward of the mixer drum 10 by a spiral drum blade provided in the mixer drum 10. For this reason, for example, the surface of the ready-mixed portion is inclined downward as shown by a broken line in FIG.
- the inclination of the surface of the raw control unit increases as the rotation speed of the mixer drum 10 increases, that is, as the rotation speed increases, and the gravity center position of the raw control unit moves forward as the inclination increases.
- the relationship between the calculated weight Wcal calculated from the load detected by the rear drum receiver 50 assuming that the sharing ratio is constant, the rotational speed of the mixer drum 10 and the actual weight Wr is shown in the graph of FIG. As shown in FIG. 4, it changes according to the rotation speed of the mixer drum 10.
- the solid line is when the mixer drum 10 is not rotating
- the broken line is when the mixer drum 10 is rotating at a low speed
- the alternate long and short dash line is more than when the mixer drum 10 is indicated by a broken line.
- the calculated weight Wcal is the actual weight when the mixer drum 10 is rotating at a high speed (dashed line) than when the mixer drum 10 is rotating at a low speed (dashed line). It is calculated to be less than Wr. This is because, when the mixer drum 10 is rotating at a high speed, the gravity center position of the raw control is separated from the rear drum receiving portion 50, and the ratio of the load acting on the rear drum receiving portion 50 with respect to the entire load is reduced. .
- the correction weight Wcor of the mixer drum 10 in which the influence of the rotation speed on the gravity center position of the raw control unit is compensated can be obtained.
- the conversion formula and the map are stored in the memory of the calculation unit 110 and are used when the correction weight Wcor of the mixer drum 10 is obtained.
- the rotation speed of the mixer drum 10 is detected by the above-described mixer drum sensor 132.
- the raw concrete in the rotating mixer drum 10 is pressed forward of the mixer drum 10 by the spiral drum blade provided in the mixer drum 10, and the surface of the raw concrete is inclined downward.
- the inclination of the surface of the green corn is correlated with the slump value (viscosity) of the green corn, and the smaller the slump value, that is, the larger the viscosity, the larger the slump value.
- the center-of-gravity position of raw control moves ahead, so that the inclination of the surface of raw control becomes large.
- the relationship between the calculated weight Wcal calculated from the load detected by the rear drum receiver 50 assuming that the sharing rate is constant, the slump value of the raw control unit, and the actual weight Wr is shown in the graph of FIG. As shown, it changes according to the slump value of the raw control.
- the broken line is the case where the mixer drum 10 rotates at a predetermined rotation speed and the slump value is large (low viscosity), and the alternate long and short dash line rotates at the same rotation speed as when the mixer drum 10 is broken.
- the slump value is small (viscosity is high).
- the calculated weight Wcal is smaller than the actual weight Wr when the slump value is small and the viscosity is high (dashed line) than when the slump value is large and the viscosity is low (dashed line). Calculated. This is because when the viscosity is large, the gravity center position of the raw control is separated from the rear drum receiving portion 50, and the ratio of the load acting on the rear drum receiving portion 50 with respect to the entire load is reduced.
- the slump value becomes the center of gravity of the raw control unit.
- the corrected weight Wcor of the mixer drum 10 in which the influence on the position is compensated can be obtained.
- the conversion formula and the map are stored in the memory of the calculation unit 110 and are used when the correction weight Wcor of the mixer drum 10 is obtained.
- the slump value may be input by an operator via the input unit 133, may be input from a slump measuring device connected via an input / output interface, or is estimated by a slump value estimation mode described later. Different values may be used.
- the calculation unit 110 starts measuring the weight of the raw control unit.
- step S101 the changeover switch 141 is set to the first connection state so that the output of the first load cell 71 and the output of the second load cell 72 are connected with the same polarity according to a command from the calculation unit 110. Switch to position. As a result, the sum of the detection value of the first load cell 71 and the detection value of the second load cell 72 is input to the calculation unit 110.
- step S102 the type of weight measurement mode is determined.
- which of the rotation measurement mode in which the weight is measured while the mixer drum 10 is rotating and the stop measurement mode in which the weight is measured while the mixer drum 10 is stopped is selected by the operator. Is determined.
- step S103 weight measurement is started in a state where the mixer drum 10 is stopped.
- step S104 weight measurement is started in a state where the mixer drum 10 is rotating.
- the mixer drum 10 is stopped at a predetermined position set in advance in step S105. Since the drum blade is spirally arranged in the mixer drum 10, there is a possibility that the load of the drum blade acting on the first load cell 71 and the second load cell 72 varies depending on the stop position. For this reason, the mixer drum 10 is stopped at a position where the load of the drum blade acting on the first load cell 71 and the second load cell 72 becomes uniform.
- step S107 When the mixer drum sensor 132 confirms that the mixer drum 10 has stopped at a predetermined position, the process proceeds to step S107.
- the mixer drum 10 is rotated at a preset measurement rotation speed in step S106. If the rotation speed fluctuates, the state of distribution of raw food becomes unstable and the position of the center of gravity changes. For this reason, the rotation speed of the mixer drum 10 is set to a fixed rotation speed. When it is confirmed by the mixer drum sensor 132 that the mixer drum 10 is rotating at a predetermined rotation speed, the process proceeds to step S107.
- the rotation speed of the mixer drum 10 is not limited to the measurement rotation speed, and may be an arbitrary rotation speed.
- step S107 the sum of the detected value of the first load cell 71 and the detected value of the second load cell 72 and the detected value of the tilt sensor 131 are acquired by the arithmetic unit 110.
- the total value is a value corresponding to W1 cos ( ⁇ ⁇ ⁇ ).
- step S108 the calculated weight Wcal of the mixer drum 10 is calculated based on the detected values of the load cells 71 and 72 and the detected value of the tilt sensor 131.
- the sharing ratio between the supporting force W1 of the rear drum receiving unit 50 and the supporting force W2 of the front drum receiving unit 60 is a predetermined value.
- a parameter that affects the sharing ratio that is, a parameter that affects the position of the center of gravity of the raw control is acquired as a correction parameter.
- the inclination angle ⁇ detected by the inclination sensor 131, the rotation speed of the mixer drum 10 detected by the mixer drum sensor 132, and the slump value of the live control input by the operator are read.
- the stop measurement mode the rotation speed of the mixer drum 10 is not read.
- the slump value is read because the surface of the ready-mixed container is inclined downward according to the slump value even after the rotation is stopped.
- the rotation measurement mode when the rotation speed of the mixer drum 10 is set to a preset measurement rotation speed, it is not necessary to read the rotation speed of the mixer drum 10.
- step S110 the calculated weight Wcal of the mixer drum 10 is corrected based on the read correction parameters (inclination angle ⁇ , rotation speed of the mixer drum 10, slump value of the raw control unit). As described above, the calculated weight Wcal and the actual weight Wr have the correlation shown in FIGS. In the calculation unit 110, the calculated weight Wcal is corrected by a conversion formula or the like created based on these correlations, and the corrected weight Wcor is calculated. When the rotation speed of the mixer drum 10 is the same as the rotation speed when the correlation due to the viscosity shown in FIG. 9 is measured in the rotation measurement mode, the correlation due to the rotation speed of the mixer drum 10 shown in FIG. 8 is corrected. Need not be incorporated into
- the correction amount based on the slump value of the live control and the correction amount based on the rotation speed of the mixer drum 10 may be converted into the correction amount based on the tilt angle ⁇ and combined with the correction based on the tilt angle ⁇ .
- the inclination angle ⁇ is 2 ° and the slump value is 15 cm, for example, if the correction by the slump value corresponds to the correction when the inclination angle ⁇ is 3 °, the inclination angle ⁇
- step S111 an average value of the correction weight Wcor is calculated.
- the drum blade is spirally arranged in the mixer drum 10. For this reason, the state of distribution of the raw concrete in the mixer drum 10 varies depending on the drum blade, but when the mixer drum 10 rotates once, the drum blade returns to the same position. For this reason, the state of distribution of the raw corn in the mixer drum 10 becomes substantially the same every time the mixer drum 10 makes one revolution. Therefore, if the corrected weight Wcor is averaged over one revolution of the mixer drum 10, a more accurate weight can be obtained. In the stop measurement mode, averaging may not be performed.
- the correction weight Wcor is calculated over a predetermined number of times (for example, 60 times) while the mixer drum 10 makes one revolution, and the average value is calculated every time the mixer drum 10 makes one revolution.
- the averaging may average the calculated weight Wcal instead of the corrected weight Wcor. In this case, the above-described correction is performed on the averaged calculated weight Wcal.
- the corrected weight Wcor averaged in step S111 is output from the calculation unit 110 to the display unit 120 and displayed on the display unit 120.
- the displayed weight may be the weight of the entire mixer drum 10 including the raw control unit, or may be the weight of only the raw control unit (only the load) obtained by subtracting the weight of the mixer drum 10 alone.
- the density of the raw control unit is input by the operator via the input unit 133, the volume amount V of the raw control unit can be displayed.
- the live control unit may have a weight that exceeds the predetermined load amount or the predetermined load amount. If the weight is not within the predetermined range, it is possible to alert the operator by changing the display color of the weight displayed on the display unit 120 to yellow or red, or generating an alarm sound. is there.
- the accurate weight W and volume V of the mixer drum 10 can be measured and displayed to the operator.
- the slump value (viscosity) of the live control and the risk of rollover of the vehicle body 2 are further estimated.
- FIG. 11 shows a state in which the raw control unit moves in the center of gravity when the mixer drum 10 rotates in the direction indicated by the dotted arrow in the cross-sectional view taken along the line II-II in FIG.
- the surface of the ready-mixed concrete that is the load is agitated in the mixer drum 10
- the surface of the ready-mixed concrete is inclined in the left-right direction of the vehicle body 2 as indicated by the solid line from the horizontal state indicated by the broken line, and the position of the center of gravity G is moved along with this To do.
- the inclination of the surface of the raw control increases as the viscosity of the raw control increases, and the amount of movement of the center of gravity G increases accordingly.
- a difference occurs between the value detected by the first load cell 71 and the value detected by the second load cell 72. For example, as shown in FIG. 11, when the gravity center G position of the raw food container moves closer to the first load cell 71, the value detected by the first load cell 71 becomes larger than the value detected by the second load cell 72. .
- the amount of movement of the center of gravity G varies depending on the volume of the raw control unit in the mixer drum 10, and even if the slump value of the raw control unit is the same, the amount of movement of the center of gravity G increases as the volume amount increases. That is, there is a correlation between the position of the center of gravity G, the volume amount, and the slump value of the raw control unit, and the slump value of the raw control unit can be estimated from the position and the volume amount of the center of gravity G of the raw control unit.
- the volume difference converted from the load difference ⁇ W1 of the load cells 71 and 72 which changes due to the movement of the gravity center G position of the raw container in the left-right direction of the vehicle body 2, and the weight calculated in the weight measurement mode.
- V the slump value of the live control is estimated.
- the load difference per unit volume ( ⁇ W1 / V) obtained by dividing the load difference ⁇ W1 by the volume amount V and the slump value of ready-mixed concrete have a relationship as shown in the graph of FIG. For example, even if the load difference ⁇ W1 is the same, the larger the volume amount V, the smaller the inclination of the surface of the ready-mixed container.
- a conversion formula or map is created based on the correlation between the load difference per unit volume ( ⁇ W1 / V) shown in FIG. 12 and the slump value of ready-mixed concrete, and the load difference per unit volume based on this conversion formula, etc. It is possible to estimate the slump value of ready-mixed concrete from ( ⁇ W1 / V).
- the conversion formula and the map are stored in the memory of the calculation unit 110, and are used when estimating the slump value of the live control.
- the slump value of the raw container is a three-dimensional relationship between the volume amount V, the load difference ⁇ W1 and the slump value of the raw container instead of the correlation between the load difference per unit volume ( ⁇ W1 / V) and the slump value of the raw container. You may estimate based on what was mapped.
- the measured slump value using the slump cone is recorded in the memory together with the estimated slump value, and is used for estimation so that the difference between the actually measured slump value and the estimated slump value becomes small. Maps and conversion formulas are updated sequentially.
- the slump value of the live control may be estimated based on the drive pressure of the hydraulic motor instead of the load difference ⁇ W1.
- the calculation unit 110 starts estimating the slump value.
- step S201 it is determined whether or not the weight of the raw control unit has been measured. If the weight of the raw control has not been measured yet, the process proceeds to step S202, and the weight measurement mode is started. If the weight of the raw control has already been measured, the process proceeds to step S203, and the second connection state in which the output of the first load cell 71 and the output of the second load cell 72 are connected with different polarities according to a command from the calculation unit 110 Thus, the changeover switch 141 is switched to the second position. As a result, the load difference ⁇ W1 that is the difference between the detected value of the first load cell 71 and the detected value of the second load cell 72 is input to the computing unit 110.
- step S204 the mixer drum 10 is rotated at a preset measurement rotational speed. If the rotation speed fluctuates, the state of distribution of raw food becomes unstable and the position of the center of gravity changes. For this reason, the rotation speed of the mixer drum 10 is set to a fixed measurement rotation speed.
- the process proceeds to step S205.
- step S ⁇ b> 205 a load difference ⁇ W ⁇ b> 1 that is a difference between the detected value of the first load cell 71 and the detected value of the second load cell 72 is acquired by the calculation unit 110.
- step S206 a load difference per unit volume ( ⁇ W1 / V) is calculated from the acquired load difference ⁇ W1 and the volume amount V of the raw control, and a load difference per unit volume ( ⁇ W1 / V) stored in the memory.
- the slump value is estimated based on the correlation between V) and the slump value of the live control.
- step S207 the average value of the estimated slump values is calculated.
- the drum blade is spirally arranged in the mixer drum 10.
- the drum blade returns to the same position when the mixer drum 10 makes one revolution. Therefore, the distribution state of the raw concrete in the mixer drum 10 is changed every time the mixer drum 10 makes one revolution. It becomes almost the same state. Therefore, if the estimated slump value is averaged over one revolution of the mixer drum 10, a more accurate slump value can be obtained.
- the averaging may average the load difference ⁇ W1 instead of the estimated slump value. In this case, the slump value is estimated based on the averaged load difference ⁇ W1 and the volume amount V.
- step S208 the slump value averaged in step S207 is output from the calculation unit 110 to the display unit 120 and displayed on the display unit 120.
- the measured slump value using the slump cone is input, it may be displayed together with the estimated slump value.
- step S209 the estimated slump value is stored in the memory.
- step S210 the arithmetic unit 110 compares the estimated slump value stored in the memory with the actually measured slump value, so that the difference between the estimated slump value and the actually measured slump value is reduced. And the map is updated.
- the slump value of the live control can be estimated and displayed to the operator.
- the estimated slump value may be used in the weighing mode.
- the mixer drum 10 is rotated during traveling to agitate the raw concrete. For this reason, as shown in FIG. 11, the center of gravity of the raw control unit moves in the left-right direction of the vehicle body 2, and the raw control unit tends to be biased to one side.
- the raw control is further biased by the centrifugal force, and the possibility that the vehicle rolls over increases.
- the total weight of the raw control is small and large, even if the weight difference of the horizontal control in the left and right direction of the vehicle body 2 is the same, the inclination of the surface of the raw control is smaller when the total weight is large.
- the possibility that the vehicle rolls over is low. In other words, it is difficult to determine whether or not the vehicle body 2 rolls over only from the difference in the weight of the vehicle body 2 in the left-right direction, which means that the vehicle body 2 is biased, and the vehicle body 2 can roll over more accurately. In order to judge sex, it is necessary to consider the total weight of raw concrete.
- the load difference ⁇ W1 of the load cells 71 and 72 which changes due to the shift of the center of gravity of the live control in the left-right direction of the vehicle body 2 and the bias of the live control caused by centrifugal force, and the weight measurement mode are calculated.
- the possibility that the vehicle body 2 rolls over is determined based on the weight W of the ready-mixed container.
- the load difference per unit weight ( ⁇ W1 / W) obtained by dividing the load difference ⁇ W1 by the weight W is compared with a predetermined threshold, and the load difference per unit weight ( ⁇ W1 / W) is compared.
- a predetermined threshold it is determined that the vehicle body 2 is likely to roll over.
- the ratio of the load difference per unit weight ( ⁇ W1 / W) to the threshold value may be displayed as the degree of risk.
- the calculation unit 110 starts determining whether the vehicle body 2 may roll over.
- step S301 it is determined whether or not the weight of the raw control unit has been measured. If the weight of the raw kon is not yet measured, the process proceeds to step S302, and the weight measurement mode is started. When the weight of the raw control has already been measured, the process proceeds to step S303, and the second connection state in which the output of the first load cell 71 and the output of the second load cell 72 are connected with different polarities according to a command from the calculation unit 110 Thus, the changeover switch 141 is switched to the second position. As a result, the load difference ⁇ W1 that is the difference between the detected value of the first load cell 71 and the detected value of the second load cell 72 is input to the computing unit 110.
- step S304 a load difference ⁇ W1, which is the difference between the detected value of the first load cell 71 and the detected value of the second load cell 72, is acquired by the calculation unit 110.
- step S305 the acquired load difference ⁇ W1 and the mixer drum The load difference per unit weight ( ⁇ W1 / W) is calculated from the weight W of 10.
- the determination unit 111 calculates a risk degree D that is a ratio of the load difference per unit weight ( ⁇ W1 / W) to the threshold value stored in the memory.
- the threshold is set to a value that is highly likely to cause the vehicle body 2 to roll over when the load difference per unit weight ( ⁇ W1 / W) exceeds this threshold. That is, when the degree of risk D is 1 or more, it means that the possibility that the vehicle body 2 rolls over is high.
- step S307 the calculated risk D is smoothed. Since the risk level D is required to be a real-time value, it is processed at a relatively high speed and noise and the like are removed.
- the smoothed risk D is output from the calculation unit 110 to the display unit 120 and displayed on the display unit 120.
- the display color of the danger level D is changed according to the magnitude of the risk level D, for example, green at 0.8 or less, yellow at 0.8 to 1.0 or less, and red when greater than 1.0. It is displayed on the display unit 120.
- step S309 the determination unit 111 determines whether or not the degree of risk D is greater than one. If the degree of risk D exceeds 1, the vehicle body 2 is very likely to roll over. Therefore, in step S310, an alarm is output from the determination unit 111 to the display unit 120, and an alarm sound or blinking lamp is displayed on the display unit 120. The operator is notified of the risk of rollover. On the other hand, if the risk level D is 1 or less, the determination ends.
- the risk of rollover of the vehicle body 2 can be determined, and the danger level D can be displayed to the operator. Further, when the risk is high, an alarm can be output.
- load cells 71 and 72 are arranged so as to detect the load of the mixer drum 10 acting in a direction perpendicular to the rotation axis C1 of the mixer drum 10. For this reason, even when the vehicle body 2 is inclined, the weight of the mixer drum 10 in the vertical direction can be easily calculated based on the inclination angle ⁇ of the vehicle body 2. As a result, the weighing accuracy of the load amount of the mixer vehicle 1 can be improved.
- the load amount weighing device 100 the load amount of the mixer vehicle 1 is reduced by the pair of load cells 71 and 72 arranged in the rear drum receiving unit 50. Weighed. As described above, since the load amount can be measured by the load cells 71 and 72 which are smaller than the conventional one, the manufacturing cost of the load amount measuring device 100 can be reduced.
- the load weighing device 100 the volume of the raw control unit in the mixer drum 10, the rotation speed of the mixer drum 10, the slump value of the raw control unit in the mixer drum 10, and the inclination angle ⁇ of the vehicle body 2, which cause the change in the gravity center position of the raw control unit. Based on this, the calculated weight Wcal calculated from the detected values of the load cells 71 and 72 is corrected. Thus, since the influence of the change in the gravity center position of the raw concrete is compensated, the weighing accuracy of the load amount of the mixer truck 1 can be improved.
- the load cells 71 and 72 of the load weighing device 100 are incorporated in the pin portions that support the rollers 54 of the guide rollers 51 and 52. As described above, since the load cells 71 and 72 are incorporated in place of members conventionally provided, the load cells 71 and 72 can be easily incorporated without significantly changing the structure of the vehicle. Further, since the load cells 71 and 72 are incorporated in the pin portions that support the rollers 54 of the guide rollers 51 and 52, the vehicle height is not changed and the weight of the vehicle body 2 is hardly increased.
- the load weighing device 100 can estimate the slump value of the raw control unit put into the mixer drum 10 by using the difference between the detection values of the load cells 71 and 72, and can be used when the vehicle turns a curve. The risk of rollover can be determined.
- the load weighing device 100 can display the volume of the raw concrete loaded in the mixer drum 10.
- raw concrete is ordered in volume units. For this reason, by using a device that can display the remaining amount of raw concrete in the mixer drum 10 that changes due to the loading and unloading of raw concrete, such as the load weighing device 100, the amount of raw concrete is appropriately adjusted. Can be managed.
- the basic configuration of the load weighing device 200 is the same as that of the load weighing device 100 according to the first embodiment.
- the load amount weighing device 200 is different from the load amount weighing device 100 in that it includes a third load cell 73 and a fourth load cell 74 provided in the front drum receiving unit 60.
- FIG. 16 is an enlarged view showing the front drum receiving portion 60 in an enlarged manner.
- FIG. 17 is a sectional view taken along line XVII-XVII in FIG. In FIG. 16, the cross section of the driving device 20 is omitted.
- the third load cell 73 and the fourth load cell 74 are flat type load cells arranged between the pedestal 61 provided on the gantry 2a of the vehicle body 2 and the driving device 20.
- the central portion 73 a of the third load cell 73 is coupled to the drive device 20 via the pressing member 62, and both end portions 73 b are coupled to the pedestal 61 via the leg portions 63.
- a strain generating portion 73c that generates strain due to a load acting on the third load cell 73 is provided.
- a strain gauge (not shown) is attached to the strain generating portion 73c, and an electrical signal proportional to the load is output from the third load cell 73 by changing the resistance of the strain gauge according to the strain amount in the strain generating portion 73c.
- the fourth load cell 74 has the same configuration and is coupled to the driving device 20 and the pedestal 61.
- the third load cell 73 and the fourth load cell 74 are arranged so that the longitudinal direction thereof is parallel to the rotation axis C1 of the mixer drum 10. Further, the third load cell 73 and the fourth load cell 74 are symmetrically arranged in the left-right direction of the vehicle body 2 with the rotation axis C1 of the mixer drum 10 interposed therebetween. Therefore, the third load cell 73 and the fourth load cell 74 are not perpendicular to the load in the vertical direction of the mixer drum 10 but perpendicular to the rotational axis C1 (X ′ axis) of the mixer drum 10, as indicated by the thick arrows in FIG. The load of the mixer drum 10 in the Y ′ axis direction is detected.
- the third load cell 73 and the fourth load cell 74 are connected to the arithmetic unit 110 via the load cell connection box 145 arranged on the gantry 2a, similarly to the first load cell 71 and the second load cell 72.
- the output of the third load cell 73 and the output of the fourth load cell 74 are connected with the same polarity. That is, the sum of the detection value of the third load cell 73 and the detection value of the fourth load cell 74 is input to the calculation unit 110 as a load in the Y′-axis direction that acts on the front drum receiving unit 60.
- the calculation unit 110 is connected to the display unit 120, the input unit 133, the inclination sensor 131, and the mixer drum sensor 132, as in the first embodiment.
- the load cells 71 and 72 for detecting the load in the rear drum receiver 50 are attached so as to detect the load in the Y′-axis direction. Therefore, the sum of the output values of the pair of load cells 71 and 72 corresponds to W1 cos ⁇ . Further, in the load amount measuring device 200, the load cells 73 and 74 for detecting the load in the front drum receiving unit 60 are attached so as to detect the load in the Y′-axis direction. Therefore, the sum of the output values of the load cells 73 and 74 corresponds to W2 cos ⁇ .
- the elevation angle ⁇ is a magnitude obtained by adding or subtracting the inclination angle ⁇ to the rotation axis angle ⁇ 1. Therefore, the output values of the load cells 71 and 72 are W1 cos ( ⁇ 1 ⁇ ⁇ ), and the output values of the load cells 73 and 74 are W2 cos ( ⁇ 1 ⁇ ⁇ ).
- the inclination angle ⁇ is obtained by the inclination sensor 131, and since the rotation axis angle ⁇ 1 is a preset value, cos ( ⁇ 1 ⁇ ⁇ ), W1 and W2 are easily calculated.
- the weight W of the mixer drum 10 is calculated, and from this weight W, the mixer drum in a state where nothing is loaded. If the weight of 10 is subtracted, the weight of the raw control can be easily calculated. In addition, if the density of the raw control unit is input by the operator, the volume amount V of the raw control unit can be displayed.
- the load weighing device 200 includes the load cells 71 and 72 for detecting the load in the rear drum receiving unit 50, the slump value estimation mode and the vehicle body rollover determination mode are executed as in the first embodiment. can do.
- the load weighing device 200 In the load weighing device 200, the detection values of the load cells 71 and 72 that detect the load in the rear drum receiver 50, the detection values of the load cells 73 and 74 that detect the load in the front drum receiver 60, and the detection of the inclination sensor 131. Based on the value, the weight W of the mixer drum 10 is calculated. As described above, the load weighing device 200 can calculate the weight W of the mixer drum 10 without taking into account the distribution ratio of the raw corn in the mixer drum 10, that is, the sharing ratio that changes in accordance with the gravity center position of the raw corn. As a result, in calculating the weight W of the mixer drum 10, the weighing accuracy of the load amount of the mixer truck 1 can be improved because it is not affected by the movement of the gravity center position of the raw control unit.
- the load weighing devices 100 and 200 are provided in a rear drum receiving portion 50 that supports the rear of the mixer drum 10 behind the vehicle body 2, load cells 71 and 72 that detect the load of the mixer drum 10, and a vehicle body that indicates the state of the vehicle body 2. And a calculation unit 110 that calculates the load amount of the load based on at least one of the state amount and the drum state amount indicating the state of the mixer drum 10 and the detection values of the load cells 71 and 72.
- the load amount of the load is calculated based on at least one of the vehicle body state amount indicating the state of the vehicle body 2 and the drum state amount indicating the state of the mixer drum 10, and the detection values of the load cells 71 and 72. .
- the load amount of the load is not only the detection value of the load cells 71 and 72 but also the vehicle body state amount indicating the state of the vehicle body 2 that affects the distribution state of the load in the mixer drum 10 and the state of the mixer drum 10. It is calculated in consideration of the drum state quantity shown. As a result, the weighing accuracy of the load capacity of the mixer truck can be improved. Further, by displaying the volume amount as the loading amount, the amount of raw food can be appropriately managed.
- the rear drum receiving portion 50 includes a roller 54 that contacts and supports the mixer drum 10 while rotating, and a pin that is inserted through the roller 54 and rotatably supports the roller 54. The load of the mixer drum 10 acting on the pin via the roller 54 is detected.
- the load cells 71 and 72 are incorporated in the pin portions that support the rollers 54 of the guide rollers 51 and 52.
- the load cells 71 and 72 can be easily incorporated without significantly changing the structure of the vehicle.
- the load cells 71 and 72 are incorporated in the pin portions that support the rollers 54 of the guide rollers 51 and 52, the vehicle height is not changed and the weight of the vehicle body 2 is hardly increased.
- the load of the mixer drum 10 in the direction perpendicular to the rotation axis C1 of the mixer drum 10 acts on the roller 54 and the pin.
- the load cells 71 and 72 measure the load in the vertical direction with high accuracy, the load cells 71 and 72 incorporated in the pin portion accurately measure the load of the mixer drum 10 on which the load is mounted. can do.
- a pair of rollers 54 is provided, and load cells 71 and 72 have a first load cell 71 and a second load cell 72 respectively provided on pins inserted into the rollers 54.
- the drum state quantity is at least one of the rotational speed of the mixer drum 10 and the viscosity of the load in the mixer drum 10, and the calculation unit 110 calculates the detected value of the first load cell 71 and the second load cell 72.
- the weight of the load is calculated from the sum of the detected values, and the load of the load is calculated by correcting the calculated weight of the load based on at least one of the vehicle body state amount and the drum state amount.
- the detection values of the first load cell 71 and the second load cell 72 are based on the inclination angle of the vehicle body 2 that causes a change in the center of gravity position of the raw control unit, the rotational speed of the mixer drum 10, and the slump value of the live control unit in the mixer drum 10.
- the calculated weight Wcal calculated from is corrected.
- the load weighing devices 100 and 200 further include a determination unit 111 that determines the risk of rollover of the vehicle body 2, and a display unit 120 that displays the determination result of the determination unit 111 and the calculation result of the calculation unit 110.
- the determination unit 111 determines the risk of rollover of the vehicle body 2 based on the difference between the detection value of the first load cell 71 and the detection value of the second load cell 72, and the display unit 120 is determined by the determination unit 111. The risk of rollover of the vehicle body 2 is displayed.
- the load weighing device 200 is provided in a front drum receiving unit 60 that supports the front of the mixer drum 10 in front of the vehicle body 2, and further includes load cells 73 and 74 that detect the load of the mixer drum 10.
- the load amount of the load is calculated based on the vehicle body state amount, the detection values of the load cells 73 and 74, and the detection values of the load cells 71 and 72.
- the detection values of the load cells 71 and 72 that detect the load in the rear drum receiving unit 50, the detection values of the load cells 73 and 74 that detect the load in the front drum receiving unit 60, and the detection value of the inclination sensor 131 Based on the above, the weight W of the mixer drum 10 is calculated. As described above, in the load weighing device 200, the weight of the mixer drum 10 is detected by the front drum receiving unit 60 and the rear drum receiving unit 50. The weight W of the mixer drum 10 can be calculated without considering the sharing ratio that changes accordingly. As a result, in calculating the weight W of the mixer drum 10, the weighing accuracy of the load amount of the mixer truck 1 can be improved because it is not affected by the movement of the gravity center position of the raw control unit.
- the load cells 71 and 72 provided in the rear drum receiver 50 and the load cells 73 and 74 provided in the front drum receiver 60 detect the load of the mixer drum 10 in the direction perpendicular to the rotation axis C1 of the mixer drum 10. To do.
- each of the load cells 71 to 74 detects the load of the mixer drum 10 in the direction perpendicular to the rotation axis C1 of the mixer drum 10, in other words, detects the load of the mixer drum 10 in the same direction.
- the weight of the mixer drum 10 in the vertical direction can be easily calculated based on the inclination angle ⁇ of the vehicle body 2 and the rotation shaft angle ⁇ 1 of the mixer drum 10. .
- the weighing accuracy of the load capacity of the mixer truck can be improved.
- by displaying the volume amount as the loading amount the amount of raw food can be appropriately managed.
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Abstract
Description
まず、図1~3を参照して、積載量計量装置100が設けられるミキサ車1について説明する。図1に示されるミキサ車1は、コンクリートプラントでミキサドラム10内に投入された生コンクリート(以下、「生コン」と称する。)を運搬する車両である。ミキサ車1は、生コン以外に砂利や砂等の骨材を運搬するが、以下の説明では積載物として生コンを積載する場合について説明する。
また、積載量計量装置100では、後方ドラム受部50に配置される一対のロードセル71,72によってミキサ車1の積載量が計量される。このように従来と比較し少ないロードセル71,72により積載量を計量することが可能となるため、積載量計量装置100の製造コストを低減することができる。
次に、図15~17を参照して、本発明の第2実施形態に係る積載量計量装置200について説明する。以下では、第1実施形態と異なる点を中心に説明し、第1実施形態と同様の構成には、同一の符号を付し説明を省略する。
Claims (6)
- 車体上に回転自在に搭載されたドラム内の積載物の積載量を計量するミキサ車の積載量計量装置であって、
前記車体の後方において前記ドラムの後方を支持する後方ドラム受部に設けられ、前記ドラムの荷重を検出する後方荷重検出器と、
前記車体の状態を示す車体状態量及び前記ドラムの状態を示すドラム状態量の少なくとも一方と、前記後方荷重検出器の検出値と、に基づいて積載物の積載量を算出する演算部と、を備えるミキサ車の積載量計量装置。 - 請求項1に記載のミキサ車の積載量計量装置であって、
前記後方ドラム受部は、回転しながら前記ドラムを接触支持するローラと、前記ローラに挿通して設けられ前記ローラを回転自在に支持するピンと、を有し、
前記後方荷重検出器は、前記ローラを介して前記ピンに作用する前記ドラムの荷重を検出するミキサ車の積載量計量装置。 - 請求項2に記載のミキサ車の積載量計量装置であって、
前記ローラは、一対設けられ、
前記後方荷重検出器は、前記ローラに挿通される前記ピンにそれぞれ設けられる第1後方荷重検出器と第2後方荷重検出器とを有し、
前記車体状態量は、前記車体の前後方向の傾斜量であり、
前記ドラム状態量は、前記ドラムの回転数及び前記ドラム内の積載物の粘性の少なくとも一方であり、
前記演算部は、前記第1後方荷重検出器の検出値と前記第2後方荷重検出器の検出値との和から積載物の重量を算出し、算出された積載物の重量を前記車体状態量及び前記ドラム状態量の少なくとも一方に基づいて補正することによって積載物の積載量を算出するミキサ車の積載量計量装置。 - 請求項2または3に記載のミキサ車の積載量計量装置であって、
前記車体の横転の危険性を判定する判定部と、前記判定部の判定結果と前記演算部の演算結果を表示する表示部と、をさらに備え、
前記判定部は、前記第1後方荷重検出器の検出値と前記第2後方荷重検出器の検出値との差に基づいて、前記車体の横転の危険性を判定し、
前記表示部は、前記判定部で判定された前記車体の横転の危険性を表示するミキサ車の積載量計量装置。 - 請求項1から4の何れか1つに記載のミキサ車の積載量計量装置であって、
前記車体の前方において前記ドラムの前方を支持する前方ドラム受部に設けられ、前記ドラムの荷重を検出する前方荷重検出器をさらに備え、
前記演算部は、前記車体状態量と、前記前方荷重検出器の検出値と、前記後方荷重検出器の検出値と、に基づいて積載物の積載量を算出するミキサ車の積載量計量装置。 - 請求項5に記載のミキサ車の積載量計量装置であって、
前記前方荷重検出器及び前記後方荷重検出器は、前記ドラムの回転軸に対して垂直な方向の前記ドラムの荷重を検出するミキサ車の積載量計量装置。
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CN112384064A (zh) * | 2018-07-10 | 2021-02-19 | 莱利专利股份有限公司 | 具有校准功能的饲料混合装置 |
GB2620642A (en) * | 2022-07-15 | 2024-01-17 | Total Vehicle Solutions Group Ltd | A vehicle for mixing concrete |
GB2620644A (en) * | 2022-07-15 | 2024-01-17 | Total Vehicle Solutions Group Ltd | A vehicle for mixing concrete |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JOP20180028A1 (ar) | 2017-03-31 | 2019-01-30 | Takeda Pharmaceuticals Co | مركب ببتيد |
JP7164969B2 (ja) * | 2018-05-09 | 2022-11-02 | Kyb株式会社 | 生コンクリート量推定装置及びこれを備えたミキサ車 |
CN113290699B (zh) * | 2021-05-20 | 2022-05-20 | 中联重科股份有限公司 | 用于确定物料的重量的方法、处理器、装置及搅拌车 |
GB2620936A (en) * | 2022-07-25 | 2024-01-31 | Total Vehicle Solutions Group Ltd | Roll over warning system |
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JPH0893045A (ja) * | 1994-09-22 | 1996-04-09 | Aibesu Techno Kk | タンク車輛 |
JPH09193134A (ja) * | 1996-01-23 | 1997-07-29 | Kayaba Ind Co Ltd | コンクリ−トミキサ車のドラム積載重量の自重計 |
US6938716B1 (en) * | 2002-03-18 | 2005-09-06 | Schwing America, Inc. | Concrete mixing truck anti-rollover system |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112384064A (zh) * | 2018-07-10 | 2021-02-19 | 莱利专利股份有限公司 | 具有校准功能的饲料混合装置 |
US12035694B2 (en) | 2018-07-10 | 2024-07-16 | Lely Patent N.V. | Feed-mixing device having a calibrating function |
GB2620642A (en) * | 2022-07-15 | 2024-01-17 | Total Vehicle Solutions Group Ltd | A vehicle for mixing concrete |
GB2620644A (en) * | 2022-07-15 | 2024-01-17 | Total Vehicle Solutions Group Ltd | A vehicle for mixing concrete |
Also Published As
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AU2016334863A1 (en) | 2018-05-17 |
JP2017072556A (ja) | 2017-04-13 |
JP6326394B2 (ja) | 2018-05-16 |
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