A device for automatically measuring the mass, centroid, length, and width of an object

Abstract

The present invention provides a device for automatically measuring the mass, centroid, length and width of an object. It includes two parallel sliding rails provided on a base, and is characterized in that a weighing mechanism, a lifting and rolling mechanism, a ranging mechanism are provided on the two parallel sliding rails, and a rolling positioner clamped on the object to be measured, and a controller electrically connected to the weighing mechanism, the lifting and rolling mechanism, and the ranging mechanism is provided on one side of the base. By adjusting the distances between the weighing mechanism, the lifting and rolling mechanism, and the ranging mechanism on the two parallel sliding rails to adapt to objects to be measured with different lengths, the lifting and rolling mechanism can move and lift the object to be measured on the device. The rolling positioner is used to measure the downward displacement and displacement of the centroid of the object to be measured. Together with a series of parameter values such as the mass, length and width of the object to be measured measured by the weighing mechanism and the ranging mechanism, the centroid position of the object to be measured is obtained through the controller. The whole measurement process is fast, efficient and accurate, and can adapt to objects to be measured with various shapes.

Description

Technical Field

[0001] The present invention relates to a measuring device, in particular to a device for automatically measuring the mass, centroid, length and width of an object, and belongs to the technical field of measuring machinery design and manufacturing. Background Art

[0002] At present, the research and development of various equipment and devices have been increasingly emphasized by various countries. Whether the working attitude of the equipment and device is stable has a great impact on its performance. Whether the working attitude of the equipment and device is stable requires accurately calculating the mass and centroid position of the product during design and development and keeping them within a certain range, so as to ensure that the product works in a stable and controllable attitude. This requires accurate and reliable measurement of its mass and centroid position, and the measurement method is as simple, convenient and versatile as possible. At present, most of the equipment and devices measure the mass and centroid position by adding a water tank on the ground. This method needs to replace some special models on the original product for measurement. When measuring different products, different measurement models are required. It not only has a high cost investment and poor versatility, but also has a large amount of repetitive work in measurement adjustment. At the same time, there is a problem of large measurement error for products with a small length. Therefore, it is necessary to improve the existing technology. Summary of the Invention

[0003] In order to solve the problems of high cost investment, poor versatility, large workload and large measurement error in the existing measurement of the mass and centroid of an object, the present invention provides a device for automatically measuring the mass and centroid of an object.

[0004] The present invention is completed through the following technical solutions: A device for automatically measuring the mass, centroid, length and width of an object, which includes two parallel sliding rails spaced on a base. It is characterized in that a weighing mechanism, a lifting and rolling mechanism, a ranging mechanism are arranged on the two parallel sliding rails, and a rolling locator clamped on the object to be measured, and a controller electrically connected to the weighing mechanism, the lifting and rolling mechanism, and the ranging mechanism is arranged on one side of the base, so as to adjust the distance between the weighing mechanism, the lifting and rolling mechanism, and the ranging mechanism on the sliding rails to adapt to objects to be measured with different lengths. After the lifting and rolling mechanism enables the object to be measured to move and lift to a set position, the rolling locator on the object to be measured measures the downward displacement and lateral displacement of its centroid, and then the mass, length and width values of the object to be measured are measured through the weighing mechanism and the ranging mechanism, and the centroid position of the object to be measured is accurately calculated through the calculation and control module in the controller.

[0005] The base is a horizontally arranged long rectangular body, and the two parallel sliding rails are symmetrically arranged on the base. The lengths of the two parallel sliding rails are adapted to the length of the base. The two parallel sliding rails adopt conventional I-shaped steel rails, so that the weighing mechanism, the lifting and rolling mechanism, and the ranging mechanism can slide smoothly on the base through the two parallel sliding rails.

[0006] The weighing mechanism includes a weighing base, which is designed as a portal-shaped base. Chutes that are slidably mated with two parallel sliding rails are respectively provided at the bottom ends of the two side plates of the portal-shaped base. A support is provided above the weighing base, which is composed of a vertical plate provided at one end above the weighing base and an inclined rod connecting the vertical plate and the weighing base. A horizontal plate extending towards the other end of the weighing base is provided at the top of the vertical plate. Two support ball heads are symmetrically provided on the horizontal plate. Weighing sensors are provided at the bottoms of the two support ball heads. The weighing sensors are electrically connected to the controller through wires, so as to support the object to be measured placed thereon through the support ball heads and measure the mass of the object to be measured through the weighing sensors.

[0007] The width of the support is adapted to the width of the weighing base. The two support ball heads on the support are made of nylon ball heads to avoid scratching the object to be measured. At the same time, the nylon ball heads have wear resistance and anti-slip properties.

[0008] Two distance measuring mechanisms are provided. Each distance measuring mechanism includes a distance measuring base, which is designed as a portal-shaped base. Chutes that are slidably mated with two parallel sliding rails are respectively provided at the bottom ends of the two side plates of the portal-shaped base. A measuring ruler is provided in the middle at one end of the distance measuring base. A distance measuring transmitter is provided on one side of the distance measuring base of one distance measuring mechanism through a horizontal plate, and a distance measuring receiver is provided on one side of the distance measuring base of the other distance measuring mechanism through a horizontal plate, so as to measure the length or width of the object to be measured through the two distance measuring mechanisms.

[0009] The lifting and rolling mechanism includes a base, which is designed as a portal-shaped base. Chutes that are slidably mated with two parallel sliding rails are respectively provided at the bottom ends of the two side plates of the portal-shaped base. A lifting assembly is provided above the base. A top plate is provided on the lifting assembly. Two frames are symmetrically provided on the top plate. Corresponding support rollers are respectively provided on the two frames. The wheel axle of one of the support rollers is connected to the output shaft of the power machine, so as to drive the support rollers to rotate under the drive of the power machine, thereby driving the object to be measured thereon to move until the object to be measured is balanced on the support rollers, so as to obtain the centroid of the object to be measured.

[0010] The lifting assembly includes a power cylinder seat provided in the middle of the base. The upper end of the movable rod of the power cylinder is fixed on the top plate. Guide sleeves are respectively provided on the base on both sides of the power cylinder seat. A guide rod is movably inserted into each guide sleeve. The upper end of each guide rod is fixed on the top plate, so as to drive the top plate and the support rollers thereon to rise or fall under the drive of the power cylinder, and be used to adjust the height of the object to be measured, so that the object to be measured is in contact with the adjacent weighing mechanism and distance measuring mechanism to measure its mass and length.

[0011] The support rollers are made of rubber rollers to avoid damaging the object to be measured and increase the anti-slip ability.

[0012] The rolling locator includes a cross bar with a spirit level in the center, and vertical rods respectively arranged at both ends of the cross bar and perpendicular to it, so as to clamp the rolling locator on the object to be measured and cooperate with the lifting and rolling mechanism for level measurement.

[0013] The two weighing mechanisms, two lifting and rolling mechanisms, two ranging mechanisms, and one cross-rolling locator form a group, and multiple groups can be set on the base according to actual needs, so as to measure the mass, centroid, width or length of multiple objects to be measured.

[0014] The controller is a conventional device for recording and calculating the collected parameters.

[0015] The present invention has the following advantages and effects: With the above solution, by adjusting the spacing of the weighing mechanism, lifting and rolling mechanism, and ranging mechanism on the two parallel slide rails to adapt to objects to be measured with different lengths, the lifting and rolling mechanism can move and lift the object to be measured on the device, and the cross-rolling locator measures the downward displacement and displacement of the centroid of the object to be measured. Together with a series of parameter values such as the mass, length, and width of the object to be measured measured by the weighing mechanism and ranging mechanism, the centroid position of the object to be measured is obtained through the controller. The entire measurement process is fast, efficient, accurate, and can adapt to objects to be measured with various shapes. It is truly an ideal measurement device. Description of the Drawings

[0016] Figure 1 is the structural diagram of the present invention;

[0017] Figure 2 is Figure 1 the side view of the lifting and rolling mechanism in

[0018] Figure 3 is Figure 1 the side view of the weighing mechanism in

[0019] Figure 4 is Figure 1 the side view of the ranging mechanism in

[0020] Figure 5 is the front view of the object to be measured placed on the device;

[0021] Figure 6 is Figure 5 the top view of

[0022] Figure 7 is Figure 5 the right view of Detailed Embodiments

[0023] The present invention will be further described below in conjunction with the drawings.

[0024] Structures, devices, and components not specifically described in the present invention are all commercially available products.

[0025] The device for automatically measuring the mass, centroid, length and width of an object provided by the present invention includes two parallel slide rails 51 spaced on a base 5. A weighing mechanism 3, a lifting and rolling mechanism 2, a ranging mechanism 1 are arranged on the two parallel slide rails 51, and a rolling locator 6 clamped on the object to be measured. A controller 4 electrically connected to the weighing mechanism 3, the lifting and rolling mechanism 2 and the ranging mechanism 1 is arranged on the front side of the base 5. The controller 4 is a conventional device, and the weighing mechanism 3, the lifting and rolling mechanism 2 and the ranging mechanism 1 can move along the two parallel slide rails 51 as required to adapt to the measurement of the mass, length and width of different objects to be measured, obtain the mass, length and width data of the object to be measured, and send these measurement data to the controller 4 for calculation, and finally obtain the centroid data mm of the object to be measured:

[0026] The base 5 is a horizontally arranged long rectangular body. The two parallel slide rails 51 are symmetrically arranged on the base 5. The lengths of the two parallel slide rails 51 are adapted to the length of the base 5. The two parallel slide rails 51 adopt conventional I-shaped steel rails so that the weighing mechanism 3, the lifting and rolling mechanism 2 and the ranging mechanism 1 can slide smoothly on the base 5 through the two parallel slide rails 51;

[0027] The weighing mechanism 3 includes a weighing base 32 which is set as a portal-shaped seat. Sliding grooves 31 slidably engaged with the two parallel slide rails 51 are respectively arranged at the bottom ends of the two side plates of the portal-shaped seat. A support 33 is arranged on the upper part of the weighing base 32. The support 33 is composed of a vertical plate 331 arranged at one end of the upper part of the weighing base 32 and an inclined rod 333 connecting the vertical plate 331 and the weighing base 32. A horizontal plate 332 extending towards the other end of the weighing base 32 is arranged at the top of the vertical plate 331. Two support ball heads 35 are symmetrically arranged on the horizontal plate 332. A weighing sensor 34 is arranged at the bottom of the two support ball heads 35, as Figure 1 、 Figure 3 , the weighing sensor 34 is electrically connected to the controller 4 through a wire so as to support the object to be measured A placed thereon through the support ball heads 35, and send the mass data of the object to be measured A to the controller 4 after obtaining it through the weighing sensor 34; the width of the support 33 is adapted to the width of the weighing base 32. The two support ball heads 35 on the support 33 are made of nylon ball heads to avoid scratching the object to be measured. At the same time, the nylon ball heads have wear resistance and anti-slip properties;

[0028] The ranging mechanism 1 is provided with two units. Each ranging mechanism 1 includes a ranging base 12, which is a portal-shaped base. At the bottom ends of the two side plates of the portal-shaped base, there are respectively chutes 11 that are slidably mated with two parallel sliding rails 51. In the middle of one end of the ranging base 12, there is a leveling rod 13. On one side of the ranging base 12 of one ranging mechanism 1, there is a first ranging sensor 14 through a horizontal plate, and on one side of the ranging base of the other ranging mechanism 1, there is a second ranging sensor 15 through a horizontal plate. The first and second ranging sensors 14 and 15 are respectively electrically connected to the controller 4 through wires, so as to measure the length or width of the object to be measured by the two ranging mechanisms, that is, after obtaining the length or width data of the object A by the first and second ranging sensors 14 and 15, the data is sent to the controller 4;

[0029] The lifting and rolling mechanism 2 includes a base 21, which is a portal-shaped base. At the bottom ends of the two side plates of the portal-shaped base, there are respectively chutes 211 that are slidably mated with two parallel sliding rails 51. An elevating assembly is provided on the upper part of the base 21. There is a top plate 233 on the elevating assembly. Two frames 23 are symmetrically arranged on the top plate 233. Corresponding support rollers 232 are respectively arranged on the two frames 23. The axle of one of the support rollers 232 is connected to the output shaft of the power machine 231, as Figure 1 , Figure 2 , so that the support roller 232 rotates under the drive of the power machine 231, thereby driving the object A thereon to move until the object A remains balanced on the support roller 232; The elevating assembly includes a power cylinder seat 22 arranged in the middle upper part of the base 21. The upper end of the movable rod 222 of the power cylinder is fixed on the top plate 233. Guide sleeves 223 are respectively arranged on the base 21 on both sides of the power cylinder seat 22. A guide rod 221 is movably inserted into each guide sleeve 223. The upper end of each guide rod 221 is fixed on the top plate 233, as Figure 1 , Figure 2 , so that under the drive of the power cylinder, the top plate 233 and the support roller 232 and the guide rod 221 thereon rise or fall, for adjusting the height of the object A, so that the object A is in contact with the adjacent weighing mechanism 3 and ranging mechanism 1 to measure its mass and length; The support roller 232 is a rubber roller to avoid damaging the object A and increase the anti-slip ability;

[0030] The horizontal rolling positioner 6 includes a cross bar 62 with a spirit level 61 in the center, and vertical rods 63 respectively arranged at both ends of the cross bar 62 and perpendicular to it, so as to clamp the horizontal rolling positioner 6 on the object A to cooperate with the lifting and rolling mechanism 2 for leveling adjustment;

[0031] Two weighing mechanisms 3, two lifting and rolling mechanisms 2, two ranging mechanisms 1, and one horizontal rolling positioner 6 form a group, and multiple groups can be set on the base 5 according to actual needs, so as to measure the mass, centroid, width or length of multiple objects A.

[0032] During operation, the distance between the weighing mechanism 3, the lifting and rolling mechanism 2, and the distance measuring mechanism 1 on the two parallel slide rails 51 is adjusted slidably to adapt to the measured object A of different lengths. The measured object A is moved and lifted on the lifting and rolling mechanism 2 until the measured object A comes into contact with the weighing mechanism 3 and the distance measuring mechanism 1. Then, the horizontal degree of the measured object A is adjusted through the cross-rolling positioner 6 on the measured object A. Then, the mass, length, and width data of the measured object A measured by the weighing mechanism 3 and the distance measuring mechanism 1 are sent into the controller 4, and the centroid position of the measured object A is obtained by the controller 4, thereby completing the measurement of the mass, centroid, length, and width of the measured object A.

[0033] Now, taking the measured object A as a cylinder as an example, the following calculations of mass, length, and centroid position are carried out:

[0034] Figure 5 、 Figure 6 、 Figure 7 The definitions of each letter in

[0035] L: The length of the measured object A, unit: mm;

[0036] G: The centroid of the measured object A, unit: mm;

[0037] G1, G2, G3, G4: The four mass values of the measured object A obtained by the four weighing sensors corresponding to the two weighing mechanisms 3 respectively, unit: kg;

[0038] G1′, G2′, G3′, G4′: The four mass values of the measured object A when it rotates 90° obtained by the four weighing sensors corresponding to the two weighing mechanisms 3 respectively, unit: kg;

[0039] Xc: The distance from the centroid 0 to the right end of the measured object A, unit: mm;

[0040] Yc: The distance from the centroid 0 to the axis of the horizontal symmetry plane of the measured object A (or from the centroid G to the X-axis), unit: mm;

[0041] Zc: The distance from the centroid 0 to the axis of the vertical symmetry plane of the measured object A (or from the centroid G to the Z-axis), unit: mm;

[0042] L1: The distance between the weighing sensors on the left and right two weighing mechanisms 3, unit: mm;

[0043] L2: The distance between the two weighing sensors on one weighing mechanism 3, unit: mm;

[0044] L3: The distance between the two weighing sensors on the right weighing mechanism 3 and the right end of the measured object A, unit: mm;

[0045] L4: The distance between the two load cells on the left weighing mechanism 3 and the left end of the object A to be measured, unit: mm;

[0046] The centroid of the object A to be measured can be understood as an equivalent point within the X, Y, and Z axis coordinates. Specifically, it is reflected in the fact that the four load cells show different weight values G1, G2, G3, and G4. Substitute the spatial position dimensions of the four sensors and calculate the centroid position Xc, Yc, and Zc values according to the principle of moment balance;

[0047] The mass G of the object A to be measured = G1 + G2 + G3 + G4, unit: kg;

[0048] The total length L of the object A to be measured = L1 + L3 + L4, unit: mm;

[0049] The distance Xc from the centroid 0 to the right end of the object A to be measured = (G1 + G2) × L1 ÷ G + L3, unit: mm;

[0050] The distance Yc from the centroid 0 to the axis of the horizontal symmetry plane of the object A to be measured = (G1′ + G3′ - G2′ - G4′) × (L2 ÷ 2) ÷ (G1′ + G2′ + G3′ + G4′), unit: mm;

[0051] The distance Zc from the centroid 0 to the axis of the vertical symmetry plane of the object A to be measured = (G2 + G4 - G1 - G3) × (L2 ÷ 2) ÷ G, unit: mm;

[0052] Thus, the position of the centroid 0 is obtained.

Claims

1. An apparatus for automatically measuring the mass, centroid, length and width of an object, which comprises two parallel slide rails spaced on a base, characterized in that A weighing mechanism, a lifting and rolling mechanism, a ranging mechanism, and a rolling positioner clamped on the object to be measured are provided on two parallel slide rails, and a controller electrically connected to the weighing mechanism, the lifting and rolling mechanism, and the ranging mechanism is provided on one side of the base; The lifting and rolling mechanism includes a base, the base is set as a portal-shaped seat, sliding grooves slidably mating with the two parallel slide rails are respectively provided at the bottom ends of the two side plates of the portal-shaped seat, a lifting assembly is provided on the upper part of the base, a top plate is provided on the lifting assembly, two frames are symmetrically provided on the top plate, corresponding support rollers are respectively provided on the two frames, and the wheel axle of one of the support rollers is connected to the output shaft of the power machine; The lifting assembly includes a power cylinder seat provided in the middle of the base, the upper end of the movable rod of the power cylinder is fixed on the top plate, guide sleeves are respectively provided on the base on both sides of the power cylinder seat, a guide rod is movably inserted into each guide sleeve, and the upper end of each guide rod is fixed on the top plate; The rolling positioner includes a cross bar with a spirit level in the center, and vertical bars provided at both ends of the cross bar and perpendicular to it.

2. The device for automatically measuring the mass, centroid, length and width of an object according to claim 1, characterized in that The base is a horizontally arranged long rectangular body, two parallel slide rails are symmetrically provided on the base, the lengths of the two parallel slide rails are adapted to the length of the base, and the two parallel slide rails adopt conventional I-shaped steel rails.

3. The device for automatically measuring the mass, centroid, length and width of an object according to claim 1, characterized in that The weighing mechanism includes a weighing base, the weighing base is set as a portal-shaped seat, sliding grooves slidably mating with the two parallel slide rails are respectively provided at the bottom ends of the two side plates of the portal-shaped seat, a support is provided on the upper part of the weighing base, the support is composed of a vertical plate provided at one end of the upper part of the weighing base and an inclined rod connecting the vertical plate and the weighing base, a horizontal plate extending towards the other end of the weighing base is provided at the top of the vertical plate, two support ball heads are symmetrically provided on the horizontal plate, weighing sensors are provided at the bottoms of the two support ball heads, and the weighing sensors are electrically connected to the controller through wires.

4. The device for automatically measuring the mass, centroid, length, and width of an object according to claim 3, characterized in that The width of the support is adapted to the width of the weighing base, and the two support ball heads on the support are nylon ball heads.

5. The device for automatically measuring the mass, centroid, length, and width of an object according to claim 1, wherein Two ranging mechanisms are provided, each ranging mechanism includes a ranging base, the ranging base is set as a portal-shaped seat, sliding grooves slidably mating with the two parallel slide rails are respectively provided at the bottom ends of the two side plates of the portal-shaped seat, a measuring ruler is provided in the middle of one end of the ranging base, a ranging transmitter is provided on one side of the ranging base of one of the ranging mechanisms through a horizontal plate, and a ranging receiver is provided on one side of the ranging base of the other ranging mechanism through a horizontal plate.

6. The device for automatically measuring the mass, centroid, length, and width of an object according to claim 1, wherein One weighing mechanism, one lifting and rolling mechanism, two ranging mechanisms, and one rolling positioner form a group.

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