CN109632062B - Weight and gravity center measuring device and measuring method - Google Patents
Weight and gravity center measuring device and measuring method Download PDFInfo
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- CN109632062B CN109632062B CN201811634530.6A CN201811634530A CN109632062B CN 109632062 B CN109632062 B CN 109632062B CN 201811634530 A CN201811634530 A CN 201811634530A CN 109632062 B CN109632062 B CN 109632062B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/02—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles
- G01G19/07—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing wheeled or rolling bodies, e.g. vehicles for weighing aircraft
Abstract
The utility model provides a weight and focus measuring device and measuring method, relates to unmanned aerial vehicle technical field. The weight and gravity center measuring device comprises a bearing component, a weighing component, a positioning component, a bearing platform, a control panel and a display piece. The weighing assembly comprises a first weighing assembly and a second weighing assembly, and the bearing platform is used for bearing the measuring piece. The first weighing group and the second weighing group are used for jointly measuring the weight of the measuring piece. The positioning assembly is fixed on the bearing assembly and used for detecting the distance between the end part of the measuring piece and the reference center of the weight and gravity center measuring device. The control board is used for calculating the distance of the gravity center of the measuring piece from the reference center and calculating the offset distance of the gravity center from the standard gravity center. The display part is used for displaying weight data of the measuring part and offset distance data of the gravity center and the standard gravity center. The weight and gravity center measuring device is high in structural integration level, small in volume and weight, simple to operate, capable of shortening operation time, capable of measuring weight and gravity center position in real time and high in measuring precision.
Description
Technical Field
The utility model relates to an unmanned air vehicle technique field particularly, relates to a weight and focus measuring device and measuring method.
Background
For unmanned aerial vehicles, the takeoff weight and the gravity center position directly influence the flight performance and flight safety of the unmanned aerial vehicles, and the takeoff weight and the actual gravity center position of the unmanned aerial vehicles need to be reasonably configured before takeoff in order to ensure safe and effective flight of the unmanned aerial vehicles.
In the prior art, the weight of the unmanned aerial vehicle is measured by adopting a common platform scale or a portable scale for small and medium-sized unmanned aerial vehicles, and whether the actual gravity center position of the unmanned aerial vehicle is suitable or not is roughly evaluated by adopting a hand-carrying or lifting mode. The method is complex in operation, the measurement precision cannot be guaranteed, and when the weight or the gravity center position of the unmanned aerial vehicle is dynamically changed (such as oiling the oil-driven unmanned aerial vehicle or installing a battery on the electric unmanned aerial vehicle), the current weight and gravity center information cannot be obtained in real time, so that the ground preparation time before the unmanned aerial vehicle takes off is seriously prolonged, and the operation efficiency of the unmanned aerial vehicle is reduced.
Disclosure of Invention
The disclosed purpose includes providing a weight and focus measuring device, its structure integrated level is high, and volume weight is little, and easy operation can shorten operating time, can measure weight and focus position in real time simultaneously, and measurement accuracy is high.
The object of the present disclosure also includes providing a method for measuring weight and center of gravity, which can quickly and conveniently measure the weight and center of gravity position of measurement pieces such as unmanned aerial vehicles, and has high measurement accuracy.
The technical problem to be solved by the present disclosure is realized by adopting the following technical scheme:
the utility model provides a weight and gravity center measuring device, which comprises a bearing component, a weighing component, a positioning component, a bearing platform, a control panel and a display part;
the weighing assembly comprises a first weighing group and a second weighing group which are arranged at the front end and the rear end of the bearing assembly, and the bearing platform is connected with the first weighing group and the second weighing group and used for bearing the measuring piece; the first weighing group and the second weighing group are used for measuring the weight of the measuring piece together; the positioning assembly is fixed on the bearing assembly and is used for detecting the distance between the end part of the measuring piece and the reference center of the weight and gravity center measuring device; the first weighing assembly, the second weighing assembly, the positioning assembly and the display piece are respectively electrically connected with the control panel;
the control board is used for calculating the distance of the gravity center of the measuring piece deviating from the reference center according to the measuring data of the first weighing group, the measuring data of the second weighing group and the weight of the measuring piece; the control board is also used for calculating the offset distance of the gravity center and the standard gravity center according to the distance between the end part of the measuring piece and the standard gravity center position of the measuring piece, the distance between the gravity center of the measuring piece and the reference center, and the distance between the end part of the measuring piece and the reference center of the weight and gravity center measuring device;
the display part is used for displaying weight data of the measuring part and offset distance data of the gravity center and the standard gravity center.
Further, the positioning assembly comprises a displacement sensor and a push-pull rod which can be retracted and extended relative to the displacement sensor, the displacement sensor is electrically connected with the control board, and the displacement sensor is used for detecting the distance between the free end of the push-pull rod and the reference center of the weight and gravity center measuring device under the condition that the free end of the push-pull rod, far away from the displacement sensor, is aligned with the end of the measuring piece.
Furthermore, the push-pull rod is rotatably connected with the displacement sensor, the positioning assembly further comprises a positioning stop block, the positioning stop block is connected with the free end of the push-pull rod, the positioning stop block is used for rotating to abut against the end part of the measuring piece, and the displacement sensor is used for detecting the distance between the positioning stop block and the reference center of the weight and gravity center measuring device.
Further, the first weighing group comprises at least two first weight sensors, and the at least two first weight sensors are arranged side by side at intervals.
Further, the second weighing group comprises at least two second weight sensors, and the at least two second weight sensors are arranged side by side at intervals.
Further, at least two first weight sensors and at least two second weight sensors are arranged in axial symmetry.
Furthermore, the weight and gravity center measuring device further comprises a support frame, the support frame is connected to the top ends of the at least two first weight sensors and the at least two second weight sensors, and the support frame is fixedly connected with the bearing platform.
Furthermore, the weight and gravity center measuring device further comprises buffering members, and each of the first weight sensors and each of the second weight sensors are connected with the bearing assembly through one buffering member.
Furthermore, the weight and gravity center measuring device further comprises a power switch, a zero clearing button and a change-over switch, wherein the power switch, the zero clearing button and the change-over switch are arranged on the bearing assembly at intervals and are respectively and electrically connected with the control panel.
The weight and gravity center measuring method provided by the embodiment of the disclosure adopts the weight and gravity center measuring device, and comprises the following steps:
arranging the measuring piece on the bearing platform;
calculating the weight of the measuring piece according to the measuring data of the first weighing group and the measuring data of the second weighing group;
calculating the distance of the gravity center of the measuring piece from the reference center according to the measuring data of the first weighing group, the measuring data of the second weighing group and the weight of the measuring piece;
and calculating the offset distance of the gravity center and the standard gravity center according to the distance between the end part of the measuring piece and the standard gravity center position of the measuring piece, the distance between the gravity center of the measuring piece and the reference center, and the distance between the end part of the measuring piece and the reference center of the weight and gravity center measuring device.
The beneficial effects of the embodiment of the disclosure are:
the weight and gravity center measuring device provided by the embodiment of the disclosure can measure the weight of the measuring part through the first weighing group and the second weighing group of the weighing assembly, the positioning assembly can detect the distance between the end part of the measuring part and the reference center of the weight and gravity center measuring device, the control panel can calculate the distance between the gravity center of the measuring part and the reference center according to the measurement data of the first weighing group, the measurement data of the second weighing group and the weight of the measuring part, calculate the offset distance between the gravity center and the standard gravity center according to the distance between the end part of the measuring part and the standard gravity center position of the measuring part, the distance between the gravity center of the measuring part and the reference center of the weight and gravity center measuring device, and display the weight data of the measuring part and the offset distance data between the gravity center and the standard gravity center on the display part. The weight and gravity center measuring device is high in structural integration level, small in volume and weight, simple to operate, capable of shortening operation time, capable of measuring weight and gravity center position in real time and high in measuring precision.
The weight and gravity center measuring method provided by the embodiment of the disclosure adopts the weight and gravity center measuring device, can quickly and conveniently measure the weight and gravity center position of measuring pieces such as an unmanned aerial vehicle, and has high measuring precision.
Drawings
In order to more clearly explain the technical solutions of the embodiments of the present disclosure, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate certain embodiments of the present disclosure, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to these drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a first view angle of a weight and center of gravity measuring device according to an embodiment of the present disclosure.
Fig. 2 is a schematic partial structural view of a weight and center of gravity measuring device according to an embodiment of the present disclosure.
Fig. 3 is a schematic structural diagram of a second view angle of the weight and center of gravity measuring device according to the embodiment of the present disclosure.
Fig. 4 is a schematic structural diagram of a positioning assembly of a weight and center of gravity measuring device according to an embodiment of the present disclosure.
Fig. 5 is a partial structural schematic diagram of a weight and center of gravity measuring device according to an embodiment of the present disclosure.
Fig. 6 is a schematic view illustrating a measurement principle of a weight and center of gravity measuring device according to an embodiment of the present disclosure.
Fig. 7 is a usage state diagram of the weight and center of gravity measuring device according to the embodiment of the present disclosure.
Icon: 100-weight and center of gravity measuring device; 110-a carrier assembly; 112-a backplane; 113-side plate; 114-a battery compartment; 115-battery compartment cover; 101-gap; 120-a weighing component; 121-first term recombination; 1211 — a first weight sensor; 102-a front end; 103-back end; 104-a connecting segment; 122-second term recombination; 1221-a second weight sensor; 130-a positioning assembly; 131-a displacement sensor; 1311-output cable; 1312-mounting angle; 132-a push-pull rod; 133-positioning a stop block; 140-a load-bearing platform; 150-a control panel; 160-a display; 170-a buffer; 180-a support frame; 181-lightening holes; 191-a power switch; 192-clear button; 193-a diverter switch; 109-measuring element.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be described clearly and completely with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are some, but not all embodiments of the present disclosure. The components of the embodiments of the present disclosure, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present disclosure, presented in the figures, is not intended to limit the scope of the claimed disclosure, but is merely representative of selected embodiments of the disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present disclosure, it should be noted that the terms "upper" and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally laid out when the disclosed products are used, and are only used for convenience in describing and simplifying the present disclosure, but do not indicate or imply that the referred devices or elements must have specific orientations, be constructed in specific orientations and operations, and thus, should not be construed as limiting the present disclosure.
Furthermore, the terms "first," "second," "third," and "fourth," etc. are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the present disclosure, it should also be noted that, unless otherwise specified or limited more specifically, the terms "disposed" and "connected" are to be construed broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present disclosure can be understood in specific instances by those of ordinary skill in the art.
In the following, an embodiment of the present disclosure will be described in detail with reference to the drawings, and features in the following embodiments may be combined with each other without conflict.
Fig. 1 is a schematic structural diagram of a first view angle of the weight and center of gravity measuring device 100 according to the present embodiment. Fig. 2 is a partial structural schematic diagram of the weight and center of gravity measuring device 100 provided in this embodiment. Referring to fig. 1 and fig. 2, the present embodiment discloses a weight and center of gravity measuring device 100, which includes a supporting assembly 110, a weighing assembly 120, a positioning assembly 130, a supporting platform 140, a control board 150 and a display 160.
The positioning assembly 130, the weighing assembly 120, the control board 150 and the display member 160 are respectively arranged on the bearing assembly 110, and the bearing platform 140 is arranged on the weighing assembly 120 and used for bearing the measuring member 109 such as an unmanned aerial vehicle. The weighing assembly 120, the positioning assembly 130 and the display member 160 are electrically connected to the control board 150, respectively. The weighing assembly 120 is used to measure the weight of the load bearing member. The positioning assembly 130 is used to measure the distance from the end of the carrier to the center of gravity from the reference center of the gravity center measuring device 100. The control board 150 is used for calculating the distance of the center of gravity of the measuring part 109 from the reference center based on the measurement data of the weighing unit 120, and for calculating the offset distance of the center of gravity from the reference center based on the distance of the end of the measuring part 109 from the standard center of gravity position of the measuring part 109, the distance of the center of gravity of the measuring part 109 from the reference center, and the distance of the end of the measuring part 109 from the weight and the reference center of the gravity center measuring device 100.
Referring to fig. 1, the supporting platform 140 is substantially plate-shaped, and the supporting platform 140 should not directly contact the supporting element 110, in this embodiment, a gap 101 is formed between the supporting platform 140 and the supporting element 110. Referring to fig. 1, the supporting platform 140 is substantially plate-shaped, and the supporting platform 140 should not directly contact the supporting element 110, in this embodiment, a gap 101 is formed between the supporting platform 140 and the supporting element 110.
Fig. 3 is a schematic structural diagram of a second view angle of the weight and center of gravity measuring device 100 according to the present embodiment. Referring to fig. 1 to fig. 3, in the present embodiment, the bearing assembly 110 is substantially in the shape of a rectangular housing, the bearing assembly 110 includes a bottom plate 112 and a plurality of side plates 113, and the plurality of side plates 113 are enclosed and disposed on the bottom plate 112.
The outer surface of the base plate 112 is recessed toward the top of the carrier assembly 110 to form a battery compartment 114 for mounting a battery to power the control board 150 and the like. The carrier assembly 110 further includes a battery compartment cover 115, and the battery compartment cover 115 is disposed in the opening of the battery compartment 114 and is detachably connected to the base plate 112.
In one embodiment, the positioning assembly 130, the weighing assembly 120 and the control board 150 are disposed on the bottom plate 112. The display member 160 is a display screen and is disposed on one side plate 113.
Fig. 4 is a schematic structural diagram of the positioning assembly 130 of the weight and center of gravity measuring apparatus 100 according to the present embodiment. Referring to fig. 2 and 4, in the present embodiment, the positioning assembly 130 includes a displacement sensor 131, a push-pull rod 132 and a positioning stopper 133. The positioning stopper 133 is connected to the displacement sensor 131 through the push-pull rod 132, and the push-pull rod 132 can be retracted relative to the displacement sensor 131 to drive the positioning stopper 133 to approach or be away from the displacement sensor 131, and in this embodiment, the push-pull rod 132 is rotationally matched with the displacement sensor 131 to drive the positioning stopper 133 to rotate relative to the displacement sensor 131.
In one embodiment, the displacement sensor 131 is fixedly connected to the bottom plate 112, and the displacement sensor 131 is substantially parallel to the long axis direction of the bearing assembly 110. The displacement sensor 131 is provided with an output cable 1311 and a mounting angle 1312. The mounting angles 1312 are used to facilitate the connection.
The free end of the push-pull rod 132 remote from the displacement sensor 131 protrudes through one of the side walls and is connected to a positioning stop 133.
It should be noted that the positioning block 133 is substantially elongated and can rotate onto the supporting platform 140 to abut against the end surface of the measuring component 109 or rotate to be parallel to the side surface of the supporting assembly 110.
It is understood that the displacement sensor 131 may be used to measure the distance between the end of the measuring member 109 and the standard center of gravity of the measuring member 109 by detecting the distance between the positioning stopper 133 and the reference center of the gravity center measuring device 100 when the positioning stopper 133 is rotated to abut against the end of the measuring member 109.
It should be appreciated that in alternative embodiments, the positioning stop 133 may also be pivotally coupled to the push-pull rod 132, and the push-pull rod 132 may be slidably engaged with the displacement sensor 131. Alternatively, without providing the positioning stopper 133, the displacement sensor 131 detects the distance from the free end of the push-pull rod 132 to the reference center of the gravity center measuring device 100 in a state where the free end of the push-pull rod 132 remote from the displacement sensor 131 is aligned with the end of the measuring piece 109, thereby measuring the distance from the end of the measuring piece 109 to the standard gravity center position of the measuring piece 109.
Fig. 5 is a partial structural schematic diagram of the weight and center of gravity measuring device 100 provided in this embodiment. Referring to fig. 2 and fig. 5, as an implementation manner, in the present embodiment, the weighing assembly 120 includes a first weighing assembly 121 and a second weighing assembly 122 disposed at front and rear ends of the bearing assembly 110, and the bearing platform 140 is connected to the first weighing assembly 121 and the second weighing assembly 122 and is used for bearing the measuring element 109. The first weighing assembly 121 and the second weighing assembly 122 are used to measure the weight of the measuring member 109.
It can be understood that the first weighing unit 121 and the second weighing unit 122 disposed at the front and rear ends of the bearing assembly 110 measure the weight of the measuring member 109 at the same time, and each of the weights occupies a certain specific gravity, which can be used to measure the actual gravity center of the measuring member 109.
In one embodiment, the first weighing assembly 121 includes two first weight sensors 1211, and the two first weight sensors 1211 are spaced side by side. The second weighing assembly 122 includes two second weight sensors 1221, and the two second weight sensors 1221 are arranged side by side and spaced apart from each other.
In the present embodiment, the two first weight sensors 1211 and the two second weight sensors 1221 have the same shape and structure. The two first weight sensors 1211 and the two second weight sensors 1221 are arranged in a rectangular shape and are disposed on the bottom plate 112. It is understood that the two first weight sensors 1211 are disposed in axial symmetry with the two second weight sensors 1221 to facilitate calculation of the specific gravity of the measuring member 109 measured by each of the first weight sensors 1211 and each of the second weight sensors 1221.
It should be understood that in other alternative embodiments, the number of the first weight sensors 1211 and the second weight sensors 1221 may also be selected to be three, four, etc.
The first weight sensor 1211 and the second weight sensor 1221 are stable in structure and have a symmetrical structure. Taking the first weight sensor 1211 as an example, the first weight sensor 1211 includes a front end 102, a rear end 103, and a connecting section 104 disposed between the front end 102 and the rear end 103.
In order to achieve a good buffering effect, in this embodiment, the weight and center of gravity measuring device 100 further includes a plurality of buffering members 170, and each of the first weight sensor 1211 and each of the second weight sensors 1221 are connected to the bearing assembly 110 through one buffering member 170.
Specifically, in the present embodiment, the buffer member 170 is connected to the bottom of the front end 102 of the first weight sensor 1211 to be further fixed to the bottom plate 112. The buffer member 170 is connected to the bottom of the rear end 103 of the second sensor to be further fixed to the base plate 112.
It will be appreciated that this configuration can improve the accuracy of the measurement by the weighing assembly 120 and facilitate the calculation.
Optionally, the weight and gravity center measuring device 100 further comprises a support frame 180, and the support frame 180 connects the weighing assembly 120 and the carrying platform 140.
In one embodiment, the supporting frame 180 is connected to the top of the rear ends 103 of the two first weight sensors 1211 and the top of the front ends 102 of the two second weight sensors 1221. And, the supporting frame 180 is fixedly connected with the carrying platform 140.
It will be appreciated that the support bracket 180 can enhance the stability of the connection between the load-bearing platform 140 and the weighing assembly 120. Optionally, in order to reduce the weight, in this embodiment, the supporting frame 180 is provided with a plurality of lightening holes 181.
At least two first weight sensors 1211 and at least two second weight sensors 1221, the supporting frame 180 is fixedly connected to the supporting platform 140.
Referring to fig. 1, as an implementation manner, in the present embodiment, the weight and center of gravity measuring device 100 further includes a power switch 191, a clear button 192 and a switch 193, and the power switch 191, the clear button 192 and the switch 193 are disposed on the bearing assembly 110 at intervals and are electrically connected to the control board 150 respectively.
It is understood that, in the present embodiment, the two first weight sensors 1211 and the two second weight sensors 1221 are also electrically connected to the control board 150, respectively.
Fig. 6 is a schematic view illustrating a measurement principle of the weight and center of gravity measuring apparatus 100 according to the present embodiment. Referring to fig. 6, when the weight and gravity center measuring device 100 is used to measure the weight of the unmanned aerial vehicle and the actual gravity center of the unmanned aerial vehicle, assuming that the weight of the unmanned aerial vehicle is W, the actual gravity center position is set to be WFruit of Chinese wolfberryWhen the distance between the gravity center position and the reference center of the gravity center measuring device 100 is s, the distance between the weight and the first weight group 121 and the second weight group 122 on the gravity center measuring device 100 is L, and the component forces on the four load cells inside the weight and gravity center measuring device 100 are G1, G2, G3, and G4, respectively, the following principles are applied to force distribution:
w ═ G1+ G2+ G3+ G4; (formula 1)
(G2+ G3-G1-G4)/(G1+ G2+ G3+ G4) × L; (formula 2)
The distance s between the actual weight and the gravity center position of the unmanned aerial vehicle relative to the reference center of the measuring device can be obtained;
it should be understood that, when only one first weight sensor 1211 and one second weight sensor 1221 are disposed inside the weight and center of gravity measuring device 100, the force components on the first weight sensor 1211 and the second weight sensor 1221 are GA and GB, respectively, which can be obtained according to the force distribution principle:
W＝GA+GB；
s＝(GB-GA)/(GA+GB)×L；
when the number of the weight sensors of the first weighing group 121 and the second weighing group 122 is plural, the calculation is similar.
Fig. 7 is a usage state diagram of the weight and center of gravity measuring device 100 according to the present embodiment. Referring to FIG. 7, it can be appreciated that WFruit of Chinese wolfberryThe actual gravity center position of the unmanned aerial vehicle is adopted, and WS is the designed gravity center position of the unmanned aerial vehicle; pull out location dog 133 and rotate to coincide with an end face of unmanned aerial vehicle, location dog 133 drives displacement sensor 131's push-pull rod 132 motion, and then can measure the distance h of the actual position of placing of aircraft for measuring device benchmark center.
For the unmanned aerial vehicle, the position of the standard gravity center of the unmanned aerial vehicle away from the end face of the unmanned aerial vehicle is a known quantity, namely H is known; assuming that the offset distance between the actual center of gravity and the standard center of gravity is d, the following calculation results:
d is s + H-H; (formula 3)
It should be understood that this principle is mainly to calculate the distance s of the actual barycentric position from the reference center of the barycentric measurement device from the weight measurement data G1, G2, G3, and G4 and the distance L between the first weighing group 121 and the second weighing group 122;
then, the distance from the standard barycentric position of the measuring unit 109 to the reference center of the gravity center measuring device 100 is calculated based on the distance H between the end of the known measuring unit 109 and the reference center of the gravity center measuring device 100 and the distance H between the end of the measured data measuring unit 109 and the standard barycentric position of the measuring unit 109,
the offset distance between the actual center of gravity and the standard center of gravity is calculated from the distance between the actual center of gravity and the reference center of the gravity center measuring device and the distance between the standard center of gravity of the measuring element 109 and the reference center of the gravity center measuring device 100.
It should be understood that equation 3 can also be transformed into, based on the actual center of gravity position, the standard center position, and the positional relationship of the weight to the reference center of the gravity center measuring device 100:
d＝s+h-H；
d＝s-(h-H)。
to sum up, can obtain unmanned aerial vehicle's actual weight according to equation 1, can obtain unmanned aerial vehicle's actual barycenter position offset relative to standard barycenter position according to equation 2 and equation 3, above measure and the calculation process all go on through the inside main control board of measuring device, therefore can accomplish the measurement process rapidly, the main control board shows the weight of measuring and the focus result simultaneously on display 160, has accomplished whole measurement process promptly.
In summary, the method for measuring the weight and the center of gravity comprises the following steps:
turning on the power switch 191, the weight and gravity center measuring device 100 is started and automatically initialized;
flatly placing a measuring piece 109 such as an unmanned aerial vehicle to be measured on a bearing platform 140 of the weight and gravity center measuring device 100, wherein the course and the weight of the unmanned aerial vehicle are consistent with the long edge of the weight and gravity center measuring device 100;
withdrawing the push-pull rod 132 and rotating the positioning stop 133 to abut the end of the measuring member 109;
calculating the weight W of the measuring member 109 according to the measurement data of the first weighing group 121 and the measurement data of the second weighing group 122, referring to formula 1;
calculating the distance s of the gravity center of the measuring piece 109 from the reference center based on the measurement data G1 and G2 of the first weighing group 121, the measurement data G3 and G4 of the second weighing group 122, and the weight of the measuring piece 109, with reference to formula 2;
the offset distance between the center of gravity and the reference center of gravity is calculated from the distance H between the end of the measuring element 109 and the reference center of the measuring element 109, the distance s between the center of gravity of the measuring element 109 and the reference center of the gravity measuring device 100, and the distance H between the end of the measuring element 109 and the reference center of the weight measuring device 100, and is referred to formula 3.
It should be appreciated that where multiple measurements are desired, the zero can be cleared via the clear button 192 and the above described operations repeated.
In summary, the weight and center of gravity measuring apparatus 100 of the present embodiment can measure the weight of the measuring member 109 through the first weighing unit 121 and the second weighing unit 122 of the weighing unit 120, the positioning unit 130 can detect the distance between the end of the measuring member 109 and the reference center of the weight and center of gravity measuring apparatus 100, the control board 150 can calculate the distance of the center of gravity of the measuring member 109 from the reference center according to the measurement data of the first weighing unit 121, the measurement data of the second weighing unit 122 and the weight of the measuring member 109, and calculates an offset distance of the center of gravity from the standard center of gravity based on a distance between the end of the measuring piece 109 and the standard center of gravity position of the measuring piece 109, a distance of the center of gravity of the measuring piece 109 from the reference center, and a distance between the end of the measuring piece 109 and the reference center of the gravity measuring device 100, and the weight data of the measuring part 109 and the data of the offset distance of the center of gravity from the standard center of gravity are displayed on the display part 160. The weight and gravity center measuring device 100 is high in structural integration level, small in volume and weight, simple to operate, capable of shortening operation time, capable of measuring weight and gravity center position in real time and high in measurement precision.
The weight and gravity center measuring method disclosed in this embodiment, using the weight and gravity center measuring device 100, can quickly and conveniently measure the weight and gravity center position of the measurement member 109 such as the unmanned aerial vehicle, and the measurement accuracy is high.
The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure, and various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Claims (10)
1. A weight and gravity center measuring device is characterized by comprising a bearing component, a weighing component, a positioning component, a bearing platform, a control panel and a display component;
the weighing assembly comprises a first weighing group and a second weighing group which are arranged at the front end and the rear end of the bearing assembly, and the bearing platform is connected with the first weighing group and the second weighing group and used for bearing the measuring piece; the positioning assembly is fixed on the bearing assembly and is used for detecting the distance between the end part of the measuring piece and the reference center of the weight and gravity center measuring device; the first weighing assembly, the second weighing assembly, the positioning assembly and the display piece are respectively electrically connected with the control panel;
the control board is used for calculating the weight of the measuring piece and the distance of the gravity center of the measuring piece deviating from the reference center according to the measuring data of the first weighing group and the measuring data of the second weighing group; the control board is also used for calculating the offset distance of the gravity center and the standard gravity center according to the distance between the end part of the measuring piece and the standard gravity center position of the measuring piece, the distance between the gravity center of the measuring piece and the reference center, and the distance between the end part of the measuring piece and the reference center of the weight and gravity center measuring device;
the display part is used for displaying weight data of the measuring part and offset distance data of the gravity center and the standard gravity center.
2. The weight and center of gravity measuring device according to claim 1, wherein the positioning assembly includes a displacement sensor and a push-pull rod retractable with respect to the displacement sensor, the displacement sensor being electrically connected to the control plate, the displacement sensor being configured to detect a distance between a free end of the push-pull rod remote from the displacement sensor and a reference center of the weight and center of gravity measuring device in a state where the free end of the push-pull rod is aligned with an end of the measuring member.
3. The weight and center of gravity measuring device of claim 2, wherein the push-pull rod is rotatably coupled to the displacement sensor, the positioning assembly further comprises a positioning stop coupled to a free end of the push-pull rod, the positioning stop is configured to rotate to abut against an end of the measuring member, and the displacement sensor is configured to detect a distance between the positioning stop and a reference center of the weight and center of gravity measuring device.
4. The weight and center of gravity measuring device of claim 1, wherein said first weighing bank includes at least two first weight sensors, at least two of said first weight sensors being spaced side-by-side.
5. The weight and center of gravity measuring device of claim 4, wherein said second weight set includes at least two second weight sensors, at least two of said second weight sensors being spaced side-by-side.
6. The weight and center of gravity measuring device of claim 5, wherein at least two of said first weight sensors are disposed in axial symmetry with at least two of said second weight sensors.
7. The weight and center of gravity measuring device of claim 5, further comprising a support frame connected to the top ends of at least two of said first weight sensors and at least two of said second weight sensors, said support frame being fixedly connected to said load-bearing platform.
8. The weight and center of gravity measuring device of claim 5, further comprising a buffer member, each of said first weight sensors and each of said second weight sensors being connected to said load bearing assembly through one of said buffer members, respectively.
9. The weight and center of gravity measuring device of claim 1, further comprising a power switch, a clear button and a switch, wherein the power switch, the clear button and the switch are disposed on the carrier assembly at intervals and are electrically connected to the control board, respectively.
10. A method for measuring weight and center of gravity, using the apparatus for measuring weight and center of gravity according to any one of claims 1 to 9, the method comprising:
arranging the measuring piece on the bearing platform;
calculating the weight of the measuring piece according to the measuring data of the first weighing group and the measuring data of the second weighing group;
calculating the weight of the measuring piece and the distance of the gravity center of the measuring piece from the reference center according to the measuring data of the first weighing group and the measuring data of the second weighing group;
and calculating the offset distance of the gravity center and the standard gravity center according to the distance between the end part of the measuring piece and the standard gravity center position of the measuring piece, the distance between the gravity center of the measuring piece and the reference center, and the distance between the end part of the measuring piece and the reference center of the weight and gravity center measuring device.
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| US11001392B1 (en) * | 2019-11-10 | 2021-05-11 | John Timothy Kern | System of hardware and software for determining the weight and center of gravity location of an airplane or other vehicles, like a forklift, truck, and maritime vessel |
| CN112798086A (en) * | 2021-01-04 | 2021-05-14 | 云南昆船电子设备有限公司 | Cylinder-like weighing equipment and weighing method |
| CN114020012B (en) * | 2021-10-22 | 2023-04-28 | 西安羚控电子科技有限公司 | Flat flight control system and method of fixed wing unmanned aerial vehicle |
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