Force sensing value calibration device and method thereof

Abstract

The invention relates to a force sensing value calibration device and a force sensing value calibration method. The device comprises a main machine frame, a large-mass weight set, a weight loading and unloading mechanism, a local indicating value error weight set, a movable cross beam, a reverser, a hanging mechanism and a force sensing value calibration mechanism. The main machine frame is of a hollowed-out structure with an upper layer and a lower layer, a partition plate with a through hole in the middle is arranged on the upper layer and the lower layer, and a middle supporting platform is arranged on the lower layer of the main machine frame. The large-mass weight group can move up and down along the lower layer of the host rack; the weight loading and unloading mechanisms are arranged on the two sides of the lower layer of the main machine rack. The local indicating value error weight group is arranged on the middle supporting platform; the movable cross beam is arranged on the upper layer of the host rack; the reverser is arranged on the upper layer of the main machine rack; the hanging mechanism is arranged on the lower layer of the main machine rack and penetrates through the partition plate to be connected with the reverser. The force sensing value calibration mechanism is arranged on the partition plate; through the arrangement, the problem of force sensing value calibration of large-mass high-precision weighing equipment is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of determining high-precision weighing equipment, and in particular to a force sensing quantity calibration device and a method thereof. Background Art

[0002] With the development of technology, large-mass and high-precision weighing equipment is increasingly used. Force sensitivity, as the minimum force change that a weighing equipment can sense, is increasingly used within the full range. At the same time, the actual force sensitivity of some weighing equipment is difficult to determine within the full range.

[0003] At present, weighing equipment is mainly used to verify or calibrate the measurement characteristics of the equipment, such as measurement error, repeatability error, eccentric load / orientation error, sensitivity, etc. There is no corresponding device or method for calibrating the force sensitivity of the equipment. Summary of the invention

[0004] In view of this, the present application provides a force sensitivity calibration device and method thereof, which can calibrate the force sensitivity of a weighing device.

[0005] According to one aspect of the present application, a force sensing quantity calibration device is provided, characterized in that it includes a main frame, a large-mass weight group, a weight loading and unloading mechanism, a local indication error weight group, a movable crossbeam, a reverser, a hanging mechanism and a force sensing quantity calibration mechanism; the main frame is a hollow upper and lower layer structure, a partition with a through hole in the middle is provided between the upper and lower layers, and the lower layer of the main frame is provided with an intermediate support platform, and the intermediate support platform is also provided with a through hole; the large-mass weight group is arranged on the lower layer of the main frame and can move up and down along the lower layer of the main frame; the weight loading and unloading mechanism is arranged on both sides of the lower layer of the main frame, and is used to The mechanism is used to drive the large mass weight group to move up and down; the local indication error weight group is arranged on the intermediate support platform and is located on both sides of the weight loading and unloading mechanism; the moving beam is arranged on the upper layer of the main frame, suitable for placing the calibrated weighing equipment, and can move up and down; the reverser is arranged on the upper layer of the main frame, passing through both sides of the moving beam; the hanging mechanism is arranged on the lower layer of the main frame, and the top of the hanging mechanism passes through the partition and is connected to the bottom of the reverser; the force sensing calibration mechanism is arranged on the partition, suitable for realizing the force sensing calibration of the calibrated weighing equipment at the local indication error measurement points at different weighing points.

[0006] In a possible implementation, the force sensing calibration mechanism includes a support frame, a lifting rod and a force sensing weight; the support frame is arranged on the partition; the lifting rod is arranged on the support frame, and the upper end of the lifting frame is connected to the support frame; the force sensing weights are divided into two groups, and a connecting rod is arranged between the two groups of the force sensing weights, and the middle end of the connecting rod is connected to the lower end of the lifting rod.

[0007] In a possible implementation, the lower layer of the main frame is a hollow cylindrical structure, a plurality of columns are provided inside the lower layer of the main frame, and the columns are arranged around the lower layer of the main frame, and the weight loading and unloading mechanism is arranged on the columns.

[0008] In a possible implementation, the local indication error weight group includes a small weight, a support assembly and a lifting rod, and the support assembly, the lifting rod and the small weight are all arranged in multiple groups; the support assembly is arranged on the intermediate support platform; the lifting rod is arranged on the support assembly, and one end of the lifting rod is connected to the support assembly; the small weight is detachably arranged at the other end of the lifting rod.

[0009] In a possible implementation, the hanging mechanism includes a hanging rod, a weight limit block and a hanging tray; the hanging rod is located at the center point of the main frame, and the upper end of the hanging rod passes through the partition and is connected to the reverser; the weight limit block is mounted on the hanging rod, and the number of the weight limit blocks is multiple, and there is a preset distance between every two weight limit blocks; the hanging tray is mounted in the middle of the hanging rod, located above the intermediate support platform, and is used for loading the small weight on the hanging rod.

[0010] In a possible implementation, the large-mass weight group includes a plurality of large weights, and the large weights penetrate the suspension rod. When the large-mass weights are loaded through a weight loading and unloading mechanism, the large-mass weights are separated from the columns and placed on weight limit blocks.

[0011] In a possible implementation, the movable crossbeam includes a worm gear and a worm, which are suitable for adjusting the position of the weighing device being calibrated.

[0012] In a possible implementation manner, a base is further included, and the base is arranged at the bottom of the host frame.

[0013] In a possible implementation, a motor is further included, and the motor is arranged on the top of the base and inside the lower layer of the main frame.

[0014] A method for automatic calibration of force sensing quantity, used for the above-mentioned force sensing quantity calibration device, comprises the following steps: firstly, fixing the weighing device to be calibrated on the load-bearing movable crossbeam, selecting the measuring point to be calibrated, moving the crossbeam so that the reverser falls on the load-bearing plane of the weighing device to be calibrated, loading the corresponding large weight onto the suspension rod through the weight loading mechanism, and loading it onto the weighing device to be calibrated through the reverser; calibrating the force sensing quantity through the force sensing quantity calibration mechanism, applying the force sensing quantity calibration weights to the reverser in turn; selecting the local indication small weights corresponding to the 50 times graduation value and the 500 graduation value respectively, and loading them onto the hanging tray of the suspension rod; then repeating the step of calibrating the force sensing quantity through the force sensing quantity calibration mechanism, applying the force sensing quantity calibration weights to the reverser in turn, until the calibration is completed; finally, unloading the large weight and the small weight, rotating the weighing device, and repeating the above process.

[0015] The beneficial effects of the present invention are as follows: the weights corresponding to the common measuring points of the weighing equipment are loaded onto the weighing equipment through the automatic loading and unloading mechanism of the weights; the force value or equivalent mass value equal to the force sensitivity of the weighing equipment to be calibrated is generated through the force sensing calibration mechanism, and loaded onto the weighing equipment step by step; wherein the force sensing calibration mechanism is based on the measurement principle of the direct measurement method, combined with the automatic loading and unloading means of the weights, to calibrate the force sensitivity of the high-precision weighing equipment. At the same time, the design adopts two sets of symmetrical structures, each measuring load is completed by a combination of two weights of the same mass, symmetrically suspended at both ends of the weight lifting mechanism, to ensure that the influence of the eccentric load is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram showing the specific structure of the automatic force sensing calibration device according to an embodiment of the present application; Figure 2 A schematic diagram showing the specific structure of a force sensing calibration mechanism of the automatic force sensing calibration device according to an embodiment of the present application; Figure 3 A schematic diagram showing the specific structure of the hanging mechanism of the automatic force sensing calibration device according to an embodiment of the present application; Figure 4 A schematic diagram showing the specific structure of a weight group with local indication error of a force sensing automatic calibration device according to an embodiment of the present application; Figure 5 A schematic diagram showing the overall structure of the automatic force sensing calibration device according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0018] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0019] In the description of the present invention, it is necessary to understand that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0020] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0021] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix", "join", "hinge", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] like Figures 1 to 5As shown, the force sensing calibration device is used to calibrate the force sensing of large mass and high precision weighing equipment, including a main frame 1, a large mass weight group 2, a weight loading and unloading mechanism 3, a local indication error weight group 4, a moving crossbeam 5, a reverser 6, a hanging mechanism 7 and a force sensing calibration mechanism 8, and the weight loading and unloading mechanism 3, the local indication error weight group 4, the moving crossbeam 5, the hanging mechanism 7 and the force sensing calibration mechanism 8 are all suitable for connecting with an external control system. The main frame 1 is a hollow upper and lower layer structure, and the lower layer of the main frame 1 is provided with an intermediate support platform 11, and a through hole is opened on the intermediate support platform 11. The large mass weight group 2 is arranged on the lower layer of the main frame 1, and can move up and down along the lower layer of the main frame 1. The weight loading and unloading mechanism 3 is arranged on both sides of the lower layer of the main frame 1, and is used to drive the large mass weight group 2 to move up and down. The local indication error weight group 4 is arranged on the intermediate support platform 11, located on one side of the weight loading and unloading mechanism 3. The movable crossbeam 5 is arranged on the upper layer of the main frame 1, and is suitable for placing the weighing equipment to be calibrated. The reverser 6 is arranged on the upper layer of the main frame 1, passes through both sides of the movable crossbeam 5, and can move up and down. The hanging mechanism 7 is arranged on the lower layer of the main frame 1, and the top of the hanging mechanism 7 passes through the main frame 1 and is connected to the bottom of the reverser 6. The force sensing calibration mechanism 8 is arranged on the partition 13, and is suitable for realizing the force sensing calibration of the weighing equipment to be calibrated at the local indication error measurement points of different weighing points.

[0023] Specifically, the main frame 1, the weight loading and unloading mechanism 3, the large mass weight group 2, the local indication error weight group 4, the moving beam 5, the reverser 6, the force sensing calibration mechanism 8 and the hanging mechanism 7, the main frame 1 is an integral frame, the main frame 1 is divided into two parts, the upper layer of the main frame 1 and the lower layer of the main frame, the upper and lower layers are provided with a partition 13 with a through hole in the middle, the lower layer of the main frame 1 is provided with an intermediate support platform 11, and the intermediate support platform 11 is also provided with a through hole, the support platform 11 is provided to be able to support the local indication error weight group 4, the moving beam 5 is provided on the upper layer of the main frame 1, and the calibrated weighing equipment force is placed on the moving beam 5, The movable crossbeam 5 is provided to change the position of the weighing device to be calibrated and to drive the weighing device to be calibrated to the designated position. The deflector 6, the hanging mechanism 7, the weight loading and unloading mechanism 3 and the large-mass weight group 2 are provided to load the corresponding large-mass weight group 2 onto the hanging mechanism 7 through the weight loading mechanism 3. The hanging mechanism 7 is connected to the deflector 6 through a double cross knife. The force value of the large-mass weight group 2 is loaded onto the weighing device to be calibrated through the deflector 6. The top of the hanging mechanism 7 is connected to the deflector 6 through a partition 13. The lower part of the hanging mechanism 7 has a weight tray with a fixed interval for loading the large-mass weight group 2. The large-mass weight group 2 is placed on the weight loading and unloading mechanism 3 when the device is not working. When the device is working, the weight loading and unloading mechanism 3 brings the large-mass weight group 2 down until it falls on the hanging mechanism 7, and acts on the weighing device to be calibrated together with the hanging mechanism 7 and the deflector 6.

[0024] The weight loading and unloading mechanism 3, the local indication error weight group 4, the moving beam 5 and the force sensing quantity calibration mechanism 8 are all suitable for connection with an external control system. Such a setting enables the control system to control the weight loading and unloading mechanism 3 to select a suitable large weight, and control the local indication error weight group 4 to load a small weight. After selecting a suitable measuring point through the control system, the moving beam 5 drives the calibrated weighing equipment to reach a suitable point. The force sensing quantity calibration mechanism 8 selects a suitable force sensing quantity weight according to the graduation value of the calibrated weighing equipment through the control system, and applies it step by step to complete the force sensing quantity calibration.

[0025] In a possible implementation, a telescopic rod is arranged between the reverse device 6 and the main frame 1, and the reverse device 6 is connected to the upper layer of the main frame 1 through the telescopic rod, and the telescopic rod can drive the reverse device 6 to move up and down. When the telescopic rod is extended, the reverse device 6 is released and falls on the weighing equipment to be calibrated.

[0026] In a possible implementation, the force sensing calibration mechanism 8 includes a support frame 81, a lifting rod 82, and a force sensing weight 83. The support frame 81 is arranged on the partition 13. The lifting rod 82 is arranged on the support frame 81, and the upper end of the lifting frame 82 is connected to the support frame 81. The force sensing weight 83 is divided into two groups, and a connecting rod 84 is arranged between the two groups of force sensing weights 83, and the middle end of the connecting rod 84 is connected to the lower end of the lifting rod 82.

[0027] Specifically, Figure 2 As shown, the specific structure of the force sensing calibration mechanism 8 includes a support frame 81, a lifting rod 82 and a force sensing weight 83. In order to reduce the influence of the eccentric load and make the whole present a double-arm symmetrical structure, the force sensing weight 83 is set in two groups. In order to achieve lifting, a lifting rod 82 is also set, and connected by a connecting rod 84, so that the middle end of the connecting rod 84 is connected to the lower end of the lifting rod 82. The support frame 81 is set to enable the lifting rod 82 and the force sensing weight 83 to be connected to the main frame 1. The force sensing test weight string group consists of two strings of force sensing weights 83 with the same shape and quality specifications. The number of force sensing weights 83 in each string is determined by the graduation value of the weighing equipment to be calibrated. If the graduation value of the weight to be measured is in the form of 1×10 k , then each string of force sensing weights 83 consists of 10 weights of the same mass. If the graduation value of the weight to be measured is 2×10 k , then each string of force sensing weights 83 consists of 5 weights of the same mass. If the graduation value of the weight to be measured is 5×10 k , each string of force sensing weights 83 consists of two weights of the same mass. The mass of each weight is 1 / 2 of the graduation value of the weighing device being calibrated.

[0028] In a possible implementation, the lower layer of the main frame 1 is a hollow cylindrical structure, a plurality of columns 12 are provided inside the lower layer of the main frame 1 , and the columns 12 are arranged around the lower layer of the main frame 1 , and the weight loading and unloading mechanism 3 is arranged on the columns 12 .

[0029] Specifically, Figure 1 As shown, in order to improve the overall mechanism, a plurality of columns 12 are provided inside the lower layer of the main frame 1, and a weight loading and unloading mechanism 3 is provided on the column 12, and the weight loading and unloading mechanism 3 is connected to the large-mass weight group 2. Such a setting can ensure that the force of the large-mass weight group 2 does not act on the hanging mechanism 7 without disassembling the large-mass weight group 2.

[0030] In a possible implementation, the local indication error weight group 4 includes a small weight 41, a support assembly 42 and a lifting rod 43, and the support assembly 42, the lifting rod 43 and the small weight 41 are all arranged in multiple groups. The support assembly 42 is arranged on the intermediate support platform 11. The lifting rod 43 is arranged on the support assembly 42, and one end of the lifting rod 43 is connected to the support assembly 42. The small weight 41 is detachably arranged at the other end of the lifting rod 43. The hanging mechanism 7 includes a hanging rod 71, a weight stop block 72 and a hanging tray 73. The hanging rod 71 is located at the center point of the main frame 1, and the upper end of the hanging rod 71 passes through the top of the lower layer of the main frame 1 and is connected to the reverser 6. The weight stop block 72 is sleeved on the hanging rod 71, and the number of the weight stop blocks 72 is multiple, and there is a preset distance between every two weight stop blocks 72. The hanging tray sleeve 73 is arranged in the middle of the hanging rod 71, and is located above the intermediate support platform 11. The large mass weight group 2 includes a plurality of large weights, which penetrate the suspension rod 71 . When the large weights are loaded through the weight loading and unloading mechanism 3 , the large weights are separated from the column 12 and placed on the weight limit block 72 .

[0031] Among them, several large weights include 1×10 k 2 multiplication value weights, 2×10 k 2 multiplication weights, 4×10 k 1 piece of graduation weight, 1×10 k+1 2 multiplication value weights, 2×10 k+1 1 piece of graduation weight, 5×10 k+1 1 piece of graduation weight, 1×10 k+2 5 weights for multiple divisions, 2×10 k+2 2 weights for multiple graduation values, where k = 2 or 3. This weight configuration ensures that the number of weights can be reduced as much as possible and the height of the equipment can be controlled while covering the calibration points of the weighing equipment.

[0032] Specifically, Figure 4 As shown, the specific structure of the local indication error weight group 4 includes a small weight 41, a support assembly 42 and a lifting rod 43. According to this embodiment, but not limited to this embodiment, a string of small weights 41, a support assembly 42 and a lifting rod 43 are all a group, and a total of six groups are set. Because the mass of the small weights 41 is different, in order to replace the appropriate small weights 41 according to the actual situation, the small weights 41 are detachably set on the lifting rod 43, and the lifting rod 43 is used to drive the small weights 4. For example, the graduation value of the measured weight is 1×10 k , each string of weights consists of two weights with a mass value of 25 times the graduation value and one weight 41 with a mass value of 200 times the graduation value. This device is equipped with a total of six sets of weights.

[0033] like Figure 3As shown, the specific structure of the hanging mechanism 7 includes a hanging rod 71, a weight limit block 72 and a hanging tray 73. The hanging tray 73 divides the hanging rod 71 into two parts, the upper part is used to carry 1×10 k , 2×10 k , 4×10 k , 1×10 k+1 Multiple graduation value weights and local indication error weight set. The lower part is used to carry 2×10 k+1 , 5×10 k+1 , 1×10 k+2 , 2×10 k+2 Multiple graduation value weights. The suspension rod 71 is located at the center point of the main frame 1, and the large mass weight group 2 is set on the suspension rod 71, and the large mass weight group 2 does not contact the suspension rod 71 when not loaded. In order to enable the large mass weight group 2 to exert force on the suspension rod 71 when loaded, a plurality of weight limit blocks 72 are set on the suspension rod 71. Because the large mass weight group 2 is composed of a plurality of large weights, a weight limit block 72 is set under each large weight, so that the large weight contacts the weight limit block 72 when working, and exerts force on the suspension rod 71. The hanging tray 73 is set so that when loading, the lifting rod 43 is lowered, and the small weights 41 fall one by one on the hanging tray 73 of the hanging mechanism 7. When unloading, the lifting rod 43 is raised, and the small weights 41 are separated from the hanging tray 73 of the hanging mechanism 7 one by one. The upper end of the suspension rod 71 passes through the top of the lower layer of the main frame 1 and is connected to the reverser 6 so that the force exerted on the suspension rod 71 acts on the reverser 6, and then the force is exerted on the weighing equipment to be calibrated through the reverser 6.

[0034] In a possible implementation, the movable crossbeam 5 includes a worm gear and a worm, which is suitable for adjusting the position of the weighing device to be calibrated.

[0035] In a possible implementation, a base 9 is further included, and the base 9 is arranged at the bottom of the host frame 1 .

[0036] Specifically, Figure 5 As shown, the base 9 is provided to make the overall structure more complete and the host frame 1 more stable.

[0037] In a possible implementation, a motor 91 is further included. The motor 91 is disposed on the top of the base 9 and is located inside the lower layer of the main frame 1 .

[0038] Specifically, Figure 1 As shown, a motor 91 is provided to supply power to the whole.

[0039] A method for automatic calibration of force sensing includes the following steps: first, fix the weighing device to be calibrated on the load-bearing movable crossbeam 5, select the measuring point to be calibrated, move the crossbeam 5 so that the deflector 6 falls on the load-bearing plane of the weighing device to be calibrated, load the corresponding large weight onto the suspension rod 71 through the weight loading mechanism 3, and load it onto the weighing device to be calibrated through the deflector 6. Calibrate the force sensing through the force sensing calibration mechanism 8, and apply the force sensing weight 83 to the deflector 6 in turn. Select small weights 41 corresponding to 50 times the graduation value and 500 times the graduation value respectively, and load them onto the hanging tray 73 of the suspension rod 71. Then repeat the step of calibrating the force sensing through the force sensing calibration mechanism 8, and apply the force sensing weight 83 to the deflector 6 in turn, until the calibration is completed. Finally, unload the large weight and the small weight 41, rotate the orientation of the weighing device, and repeat the above process.

[0040] The present application realizes the calibration of the indication error of different weighing points of the calibrated weighing equipment by direct comparison method, and traces the force value / mass value to the large mass weight group 2. The force sensitivity calibration mechanism 8 realizes the calibration of the force sensitivity of the calibrated weighing equipment at the local indication error measurement points of different weighing points. During calibration, the calibrated weighing equipment is first fixed on the load-bearing movable beam 5, and the beam 5 is moved so that the reverser 6 falls on the load-bearing plane of the calibrated weighing equipment. The external control system selects the large weight to be applied according to the calibration point and places the weight on the hanging mechanism 7 through the weight loading and unloading mechanism 3. The force sensitivity calibration mechanism 8 selects the appropriate small weight 41 according to the graduation value of the calibrated weighing equipment through the external control system, applies it step by step, and completes the force sensitivity calibration. Taking the weighing equipment with a graduation value of 10g as an example, it is necessary to apply the electromagnetic force corresponding to 10g to 100g and 500g to 600g respectively to verify the accuracy of its force sensitivity. In case of special measurement points, the corresponding force sensitivity small weight 41 can be applied as required to verify the accuracy of its force sensitivity.

[0041] The above are only preferred specific implementations of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and concepts of the present invention within the scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A force sensing calibration device, characterized in that: It includes a main frame, a large mass weight group, a weight loading and unloading mechanism, a local indication error weight group, a moving beam, a reverser, a hanging mechanism and a force sensing calibration mechanism; The mainframe frame is a hollow structure with two layers, the upper and lower layers are provided with partitions with through holes in the middle, and the lower layer of the mainframe frame is provided with an intermediate support platform, and the intermediate support platform is also provided with through holes; The large mass weight group is arranged on the lower layer of the main frame and can move up and down along the lower layer of the main frame; The weight loading and unloading mechanism is arranged on both sides of the lower layer of the main frame, and is used to drive the large mass weight group to move up and down; The local indication error weight group is arranged on the intermediate support platform and located on both sides of the weight loading and unloading mechanism; The movable crossbeam is arranged on the upper layer of the main frame, is suitable for placing the weighing equipment to be calibrated, and can move up and down; The reverser is arranged on the upper layer of the main frame and passes through both sides of the moving beam; The hanging mechanism is arranged at the lower layer of the main frame, and the top of the hanging mechanism passes through the partition and is connected with the bottom of the reverser; The force sensing calibration mechanism is arranged on the partition, and is suitable for realizing the force sensing calibration of the local indication error measurement points of the weighing equipment to be calibrated at different weighing points.

2. The force sensing calibration device according to claim 1, characterized in that: The force sensing calibration mechanism comprises a support frame, a lifting rod and a force sensing weight; The support frame is arranged on the partition; The lifting rod is arranged on the supporting frame, and the upper end of the lifting rod is connected to the supporting frame; The force sensing weights are in two groups, a connecting rod is arranged between the two groups of force sensing weights, and the middle end of the connecting rod is connected to the lower end of the lifting rod.

3. The force sensing calibration device according to claim 1, characterized in that: The lower layer of the main frame is a hollow cylindrical structure, a plurality of columns are arranged inside the lower layer of the main frame, and the columns are arranged around the lower layer of the main frame, and the weight loading and unloading mechanism is arranged on the columns.

4. The force sensing calibration device according to claim 3, characterized in that: The local indication error weight set includes a small weight, a support assembly and a lifting rod, and the support assembly, the lifting rod and the small weight are all arranged in multiple groups; The support assembly is arranged on the intermediate support platform; The lifting rod is arranged on the supporting assembly, and one end of the lifting rod is connected to the supporting assembly; The small weight is detachably arranged at the other end of the lifting rod.

5. The force sensing calibration device according to claim 4, characterized in that: The hanging mechanism includes a hanging rod, a weight limit block and a hanging tray; The suspension rod is located at the center point of the mainframe frame, and the upper end of the suspension rod passes through the partition plate and is connected to the reverser; The weight limit block is sleeved on the suspension rod, and there are multiple weight limit blocks, and there is a preset distance between every two weight limit blocks; The hanging tray is sleeved in the middle of the hanging rod and is located above the middle supporting platform, and is used for loading the small weight on the hanging rod.

6. The force sensing calibration device according to claim 5, characterized in that: The large-mass weight group includes a plurality of large weights, and the large weights penetrate the suspension rod. When the large-mass weights are loaded through the weight loading and unloading mechanism, the large-mass weights are separated from the columns and placed on the weight limiting blocks.

7. The force sensing calibration device according to any one of claims 1 to 6, characterized in that: The movable crossbeam comprises a worm gear and a worm, and is suitable for adjusting the position of the weighing device to be calibrated.

8. The force sensing calibration device according to any one of claims 1 to 6, characterized in that: It also includes a base, which is arranged at the bottom of the main frame.

9. The force sensing calibration device according to claim 8, characterized in that: It also includes a motor, which is arranged on the top of the base and inside the lower layer of the main frame.

10. A method for automatic calibration of force sensing, characterized in that: The force sensing calibration device according to any one of claims 1 to 9 comprises the following steps: First, fix the weighing device to be calibrated on the load-bearing moving beam, select the measuring point to be calibrated, move the beam so that the deflector falls on the load-bearing plane of the weighing device to be calibrated, load the corresponding large weight onto the boom through the weight loading mechanism, and load it onto the weighing device to be calibrated through the deflector; Calibrate the force sensing quantity by means of the force sensing quantity calibration mechanism, and apply the force sensing quantity calibration small weights to the reverser in turn; Select the local indicating small weights corresponding to the 50 times graduation value and the 500 graduation value respectively, and load them onto the hanging tray of the boom; Then, the force sensing quantity is calibrated by the force sensing quantity calibration mechanism, and the force sensing quantity calibration weight is applied to the reverser in sequence, until the calibration is completed; Finally, unload the large and small weights, rotate the weighing device, and repeat the above process.

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