A method for preventing external support from interfering with weighing

Abstract

The invention discloses a weighing method to prevent external support interference, comprising: placing an object to be weighed on a tray of a weighing instrument; obtaining a first weighing result of the object to be weighed by the weighing instrument, and saving the first weighing result; controlling a counterweight adding mechanism to add a counterweight block of a first preset weight to the object to be weighed, and obtaining a second weighing result of the object to be weighed by the weighing instrument; judging whether the second weighing result is the sum of the first weighing result and the first preset weight, and if so, controlling the weighing display instrument to display the first weighing result; if not, obtaining a corrected weighing result according to the first weighing result, the second weighing result and the first preset weight; and controlling the weighing display instrument to display the corrected weighing result. The method can prevent external support interference of the object to be measured and obtain the correct weight.

Description

Technical Field

[0001] The invention relates to the field of weighing, and in particular to a weighing method for preventing external support from interfering with the weighing. Background Art

[0002] Weighing instruments, also known as weighing instruments, are widely used in industry, agriculture, commerce, scientific research, medical and health departments. Weighing instruments use Hooke's law or the principle of lever balance of force to measure the mass of an object. Weighing instruments are mainly composed of three parts: a load-bearing system (such as a scale pan), a force transmission conversion system (such as a lever force transmission system) and an indication system (such as a dial). Weighing instruments can be divided into three categories according to their structural principles: mechanical scales, electronic scales, and electromechanical combined scales. Mechanical scales are further divided into lever scales and spring scales. According to the measurement method, they are divided into non-automatic scales and automatic scales. The main varieties include balances, beam scales, case scales, platform scales, underground scales, ground scales, rail scales, belt scales, postal scales, hanging scales, batching scales, and bagging scales. The focus of the development of weighing instruments is electronic weighing instruments. The use of modern technologies such as program control, group control, teleprinting records, and screen displays makes weighing instruments fully functional and more efficient. An instrument that measures the mass of an object by measuring its weight (the magnitude of the gravity it is subjected to). Some weighing instruments are customarily called scales. Weighing instruments are widely used in industry, agriculture, commerce, scientific research, medical care and other departments.

[0003] No matter how precise the weighing machine is, it is possible that weighing errors will occur due to external interference. In particular, when the object to be weighed touches an object outside the weighing machine during the weighing process, part of the gravity of the object to be weighed will be borne by the object outside the weighing machine, resulting in the weighing machine being unable to accurately obtain the weight of the object to be weighed. This problem is difficult to detect during actual use. Summary of the invention

[0004] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide a weighing method to prevent external support from interfering with the weighing, aiming to solve the problem that the object to be weighed is interfered with by external support during the weighing process and provide an accurate weight of the object to be weighed.

[0005] To achieve the above object, the present invention discloses a method for preventing external support from interfering with weighing, the method comprising:

[0006] Step S1, placing the object to be weighed on the storage tray of the weighing instrument; wherein the weighing instrument includes the storage tray, the lower part of the storage tray is connected to the force-bearing end of the weighing sensor, and the weighing sensor is electrically connected to the weighing display instrument; the weighing instrument also includes a counterweight adding mechanism;

[0007] Step S2, obtaining a first weighing result m1 of the weighing instrument on the object to be weighed, and saving the first weighing result m1;

[0008] Step S3: Control the weight adding mechanism to add a first preset weight m to the object to be weighed. s A counterweight block is provided, and a second weighing result m2 of the object to be weighed by the weighing instrument is obtained; wherein the weight of the counterweight block is less than the weight of the object to be weighed;

[0009] Step S4: Determine whether the second weighing result m2 is the sum of the first weighing result m1 and the first preset weight m s If yes, control the weighing display instrument to display the first weighing result m1; if no, proceed to step S5;

[0010] Step S5: according to the first weighing result m1, the second weighing result m2 and the first preset weight m s , get the corrected weighing result m f ; Wherein, the corrected weighing result m f satisfy

[0011] Step S6: Control the weighing display instrument to display the corrected weighing result m f .

[0012] Optionally, after step S2, the method further includes:

[0013] Step A, controlling the transport mechanism to transport the storage tray to drive the object to be weighed to rise or fall; wherein the transport mechanism is arranged between the storage tray and the force-bearing end of the weighing sensor;

[0014] Step B, obtaining the third weighing result m3 of the object to be weighed by the weighing instrument, and determining whether the third weighing result m3 is equal to the first weighing result m1; if they are equal, controlling the weighing display instrument to display the first weighing result m1; if they are not equal, issuing a reminder to enable the user to adjust the placement of the object to be weighed.

[0015] Optionally, after step S2, the method further includes:

[0016] Step C: energize the electromagnetic weight connected to the bottom of the storage tray to increase the electromagnetic weight by a second preset weight m. k , and obtain a fourth weighing result m4 of the object to be weighed by the weighing instrument;

[0017] Step D: Determine whether the fourth weighing result m2 is the sum of the first weighing result m1 and the second preset weight m k If yes, the weighing display instrument is controlled to display the first weighing result m1; if not, a reminder is issued to enable the user to adjust the placement of the object to be weighed.

[0018] Optionally, in step S3, Velcro is provided on the bottom surface of the counterweight block, and the counterweight block is adhered to the object to be weighed through the Velcro provided on the bottom surface, and the counterweight block is only connected to the object to be weighed.

[0019] Optionally, the weight adding mechanism includes a transport unit and an electromagnetic adsorption unit connected to the transport unit, and step S3 includes:

[0020] Step S301, powering the electromagnetic adsorption unit so that the electromagnetic adsorption unit adsorbs the counterweight block; wherein the counterweight block is made of metal;

[0021] Step S302: Control the transport unit to transport the counterweight to the object to be weighed, and cancel the power supply to the electromagnetic adsorption unit, so that the counterweight falls on the object to be weighed.

[0022] Optionally, the step S3 specifically includes:

[0023] The mechanical arm controlling the counterweight adding mechanism grasps the counterweight block, and transports the counterweight block to be placed on the object to be weighed; wherein the counterweight adding mechanism is a mechanical arm type transport structure, and transports by grasping and rotating.

[0024] Optionally, the placement surface of the storage tray is made of frosted material to increase friction with the object to be weighed and prevent the object to be weighed from sliding.

[0025] Optionally, after step S6, the method further includes:

[0026] The counterweight adding mechanism is controlled to remove the counterweight block on the object to be weighed.

[0027] Optionally, the weight of the counterweight block is no greater than the weight of the object to be weighed.

[0028] Beneficial effects of the present invention: 1. The present invention controls the weight adding mechanism to add a first preset weight m to the object to be weighed. s The counterweight block is used to obtain the second weighing result m2 of the weighing instrument for the object to be weighed; and it is determined whether the second weighing result m2 is the first weighing result m1 and the first preset weight m s If yes, the weighing display instrument is controlled to display the first weighing result m1; if not, the first weighing result m1, the second weighing result m2 and the first preset weight m s , get the corrected weighing result m f ; Step S6, control the weighing display instrument to display the corrected weighing result m f. The present invention adds a counterweight block of known weight to the object to be weighed, so that the counterweight block and the object to be weighed become a measurement entity, and then according to whether the increased weight measured by the weighing instrument is the weight of the counterweight block, it can be judged whether the object to be weighed has external support; if there is external support, because the counterweight block and the object to be weighed are a whole, the correct proportion of the object to be weighed can be obtained according to the ratio of the increased weight measured by the weighing instrument to the weight of the counterweight block (that is, the external support ratio of the gravity of the counterweight block is the same as the external support ratio of the object to be weighed). In this way, the present invention can effectively solve the inaccurate measurement caused by external support interference, and it is very simple and fast. 2. The present invention can also be used to transport the storage tray of the carrying mechanism to drive the object to be weighed to rise or fall; obtain the third weighing result m3 of the object to be weighed by the weighing instrument, and judge whether the third weighing result m3 is equal to the first weighing result m1; if they are equal, the weighing display instrument is controlled to display the first weighing result m1; if they are not equal, a reminder is issued to allow the user to adjust the placement of the object to be weighed. If there is external support, the rise and fall of the object to be weighed will inevitably bring about changes in the support point, thereby changing the external support force on the object to be weighed, and then causing the force measured by the weighing instrument to change. The present invention effectively utilizes this point to automatically determine whether there is external support interference, and adjust the placement in time to avoid weighing errors. 3. The present invention energizes the electromagnetic weight connected to the bottom of the storage tray to increase the electromagnetic weight to a second preset weight m k , and obtain a fourth weighing result m4 of the weighing instrument on the object to be weighed; energize the electromagnetic weight connected to the bottom of the storage tray to increase the electromagnetic weight by a second preset weight m k , and obtain the fourth weighing result m4 of the weighing instrument for the object to be weighed. If there is external support, the weight is generated by energizing the weights, so that the storage tray drops slightly, changing the external support force of the object to be weighed, and then the force measured by the weighing instrument changes. Compared with directly rising and falling the object to be weighed, such subtle changes can facilitate the external support judgment of heavy objects and avoid damage to the weighing instrument caused by direct large rises and falls of heavy weights. In summary, the present invention can effectively judge whether the object to be weighed is supported by external objects outside the weighing instrument by adding counterweights to the object to be weighed, raising or lowering the object to be weighed, and electromagnetic weights, and provide accurate weight of the object to be weighed. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a flow chart of a method for preventing external support from interfering with weighing provided by a specific embodiment of the present invention. DETAILED DESCRIPTION

[0030] The present invention discloses a weighing method to prevent external support from interfering with the weighing. Those skilled in the art can refer to the content of this article and appropriately improve the technical details to achieve the desired effect. It should be particularly noted that all similar substitutions and modifications are obvious to those skilled in the art and are considered to be included in the present invention. The method and application of the present invention have been described through preferred embodiments, and relevant personnel can obviously modify or appropriately change and combine the method and application described herein without departing from the content, spirit and scope of the present invention to implement and apply the technology of the present invention.

[0031] The applicant has found through research that during the weighing process, if the object to be weighed touches an object outside the weighing instrument, part of the gravity of the object to be weighed will be borne by the object outside the weighing instrument, resulting in the weighing instrument being unable to accurately obtain the weight of the object to be weighed. This problem is difficult to detect during actual use. The prior art has set the expected number of contact points, that is, whether the contact points between the object to be weighed and the weighing instrument meet the requirements, to determine whether there is external support interference on the object to be weighed. This method is very troublesome and inefficient.

[0032] Therefore, an embodiment of the present invention provides a method for preventing external support from interfering with weighing, such as Figure 1 As shown, the method includes:

[0033] Step S1: placing the object to be weighed on the placement tray of the weighing instrument.

[0034] The weighing instrument comprises a storage tray, the lower part of which is connected to the force-bearing end of the weighing sensor, and the weighing sensor is electrically connected to the weighing display instrument; the weighing instrument also comprises a counterweight adding mechanism.

[0035] It should be noted that the weighing instrument is generally an electronic scale, and the weighing sensor can be resistive, capacitive, digital, etc.

[0036] Step S2: obtaining a first weighing result m1 of the weighing instrument on the object to be weighed, and saving the first weighing result m1.

[0037] It should be noted that if the object to be weighed is supported by the outside world, the first weighing result m1 is not the actual weight of the object to be weighed. If the object to be weighed is not supported by the outside world, the first weighing result m1 is the actual weight of the object to be weighed.

[0038] Step S3: Control the weight adding mechanism to add a first preset weight m to the object to be weighed. s The counterweight block is added, and the second weighing result m2 of the object to be weighed by the weighing instrument is obtained.

[0039] Among them, the weight of the counterweight block is less than the weight of the object to be weighed.

[0040] Optionally, the weight of the counterweight should be no greater than the weight of the object to be weighed.

[0041] It should be noted that the weight of the counterweight is much smaller than the weight of the object to be weighed in order to ensure that the force-bearing area of ​​the weighing sensor changes slightly after adding the counterweight, and to avoid changes in the external support force when the object to be weighed has external support.

[0042] In a specific embodiment, the weight adding mechanism includes a transport unit and an electromagnetic adsorption unit connected to the transport unit, and step S3 includes:

[0043] Step S301, powering the electromagnetic adsorption unit so that the electromagnetic adsorption unit adsorbs the counterweight block; wherein the counterweight block is made of metal;

[0044] Step S302: Control the transport unit to transport the counterweight to the object to be weighed, and cancel the power supply to the electromagnetic adsorption unit, so that the counterweight falls on the object to be weighed.

[0045] By transporting the counterweight by electromagnetic adsorption, it is easier to pick up and put down the counterweight, and it is easier to control the placement position.

[0046] In another specific embodiment, step S3 specifically includes:

[0047] The mechanical arm controlling the counterweight adding mechanism grasps the counterweight block, and transports the counterweight block to be placed on the object to be weighed; wherein the counterweight adding mechanism is a mechanical arm type transport structure, which transports by grasping and rotating.

[0048] Robotic gripping is a common technology and is easy to implement.

[0049] Optionally, in step S3, Velcro is provided on the bottom surface of the counterweight block, and the counterweight block is attached to the object to be weighed via the Velcro provided on the bottom surface, and the counterweight block is only connected to the object to be weighed.

[0050] It should be noted that the Velcro is used to prevent the counterweight from sliding off the object to be weighed, so that the counterweight and the object to be weighed appear as a whole to the weighing instrument or any external object. The weight of the Velcro can be calculated in the counterweight or ignored, but the premise for ignoring it is that the weight of the counterweight is much greater than the Velcro.

[0051] Step S4, determine whether the second weighing result m2 is equal to the first weighing result m1 and the first preset weight m s If yes, the weighing display instrument is controlled to display the first weighing result m1; if not, the process goes to step S5.

[0052] It should be noted that the second weighing result m2 is the sum of the first weighing result m1 and the first preset weight m s The sum of the first weighing result m1 and the first preset weight m2 indicates that the object to be weighed falls completely on the weighing instrument's tray, so the first weighing result m1 is the weight of the object to be weighed. s The sum of , indicates that the object to be weighed does not fall completely on the weighing instrument's tray, and is partially supported by the outside world. Because only when the object to be weighed falls completely on the weighing instrument's tray, the weight added by the entire weighing unit (the counterweight and the object to be weighed) on the weighing instrument will be the weight of the counterweight itself.

[0053] Step S5: According to the first weighing result m1, the second weighing result m2 and the first preset weight m s , get the corrected weighing result m f .

[0054] Among them, the corrected weighing result m f satisfy

[0055] It should be noted that when the counterweight and the object to be weighed are considered as a whole, the support ratio of the counterweight and the object to be weighed by the weighing instrument and the outside world is the same. For example, if the object to be weighed is 100kg and the counterweight is 1kg, the weight of the counterweight on the weighing instrument is 0.8kg, and the weight of the external object on the counterweight is 0.2kg, then the weight of the object to be weighed on the weighing instrument is 80kg, and the weight of the external object on the weighing instrument is 20kg. Based on this, the weighing result can be corrected to obtain the correct weighing result.

[0056] Step S6: Control the weighing display instrument to display the corrected weighing result m f .

[0057] In a specific embodiment, after step S2, the method further includes:

[0058] Step A, controlling the transport mechanism to transport the storage tray to drive the object to be weighed to rise or fall; wherein the transport mechanism is arranged between the storage tray and the force-bearing end of the weighing sensor;

[0059] Step B, obtaining the third weighing result m3 of the object to be weighed by the weighing instrument, and determining whether the third weighing result m3 is equal to the first weighing result m1; if they are equal, controlling the weighing display instrument to display the first weighing result m1; if they are not equal, issuing a reminder to enable the user to adjust the placement of the object to be weighed.

[0060] In this embodiment, in the presence of external support, the rise and fall of the object to be weighed will inevitably bring about changes in the support point, thereby changing the external support force on the object to be weighed, and then causing the force measured by the weighing instrument to change. The embodiment of the present invention effectively utilizes this point to automatically determine whether there is external support interference and avoid weighing errors. Compared with adding a counterweight, the weighing instrument of this embodiment has a simpler structure and reduces costs. It can still automatically determine whether there is external support interference at a low cost.

[0061] In a specific embodiment, after step S2, the method further includes:

[0062] Step C: energize the electromagnetic weight connected to the bottom of the storage tray to increase the electromagnetic weight by a second preset weight m. k , and obtain a fourth weighing result m4 of the object to be weighed by the weighing instrument;

[0063] Step D: Determine whether the fourth weighing result m2 is the sum of the first weighing result m1 and the second preset weight m k If yes, the weighing display instrument is controlled to display the first weighing result m1; if not, a reminder is issued to enable the user to adjust the placement of the object to be weighed.

[0064] It should be noted that, in the case of external support, the weight is generated by electrifying the weight, causing the tray to drop slightly, changing the external support force on the object to be weighed, and thus causing the force measured by the weighing instrument to change. Compared with direct rise and fall, such subtle changes can facilitate the external support judgment of heavy objects and avoid damage to the weighing instrument caused by direct large rise and fall of heavy weight.

[0065] Optionally, the placement surface of the storage tray is made of frosted material to increase friction with the object to be weighed and prevent the object to be weighed from sliding.

[0066] It should be noted that if the object to be weighed slides during the weighing process, it is very likely to reduce the accuracy of the weighing result. By increasing friction, the possibility of sliding can be greatly reduced. At the same time, it can avoid the problem of constantly changing support points caused by sliding in the case of external support.

[0067] Optionally, after step S6, the method further includes:

[0068] The counterweight adding mechanism is controlled to remove the counterweight block on the object to be weighed.

[0069] In the embodiment of the present invention, a first preset weight m is added to the object to be weighed by controlling the counterweight adding mechanism. s The counterweight block is used to obtain the second weighing result m2 of the weighing instrument to be weighed; and it is determined whether the second weighing result m2 is the first weighing result m1 and the first preset weight m sIf yes, the weighing display instrument is controlled to display the first weighing result m1; if not, the first weighing result m1, the second weighing result m2 and the first preset weight m s , get the corrected weighing result m f ; Step S6, control the weighing display instrument to display the corrected weighing result m f . The embodiment of the present invention adds a counterweight block of known weight to the object to be weighed, so that the counterweight block and the object to be weighed become a measurement entity, and then according to whether the increased weight measured by the weighing instrument is the weight of the counterweight block, it can be judged whether the object to be weighed has external support; if there is external support, because the counterweight block and the object to be weighed are a whole, the correct proportion of the object to be weighed can be obtained according to the ratio of the increased weight measured by the weighing instrument to the weight of the counterweight block (that is, the external support ratio of the gravity of the counterweight block is the same as the external support ratio of the object to be weighed). The embodiment of the present invention can effectively solve the inaccurate measurement caused by external support interference in this way, and it is very simple and fast. The embodiment of the present invention can also be used to control the carrying mechanism to transport the storage tray to drive the object to be weighed to rise or fall; obtain the third weighing result m3 of the object to be weighed by the weighing instrument, and judge whether the third weighing result m3 is equal to the first weighing result m1; if they are equal, the weighing display instrument is controlled to display the first weighing result m1; if they are not equal, a reminder is issued to allow the user to adjust the placement of the object to be weighed. If there is external support, the rise and fall of the object to be weighed will inevitably bring about changes in the support point, thereby changing the external support force on the object to be weighed, and then causing the force measured by the weighing instrument to change. The embodiment of the present invention effectively utilizes this point to automatically determine whether there is external support interference, thereby avoiding weighing errors. The embodiment of the present invention energizes the electromagnetic weight connected to the bottom of the storage tray so that the electromagnetic weight increases the second preset weight m k , and obtain a fourth weighing result m4 of the weighing instrument on the object to be weighed; energize the electromagnetic weight connected to the bottom of the storage tray to increase the electromagnetic weight by a second preset weight m k , and obtain the fourth weighing result m4 of the weighing instrument for the object to be weighed. If there is external support, the weight is generated by energizing the weights, causing the storage tray to drop slightly, changing the external support force of the object to be weighed, and thus causing the force measured by the weighing instrument to change. Compared with direct rise and fall, such subtle changes can facilitate the external support judgment of heavy objects and avoid damage to the weighing instrument caused by direct large rise and fall of heavy weights. In summary, the embodiments of the present invention can effectively judge whether the object to be weighed is supported by external objects outside the weighing instrument by adding counterweights to the object to be weighed, raising or lowering the object to be weighed, and electromagnetic weights, and provide accurate weight of the object to be weighed.

[0070] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0071] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0072] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A method for preventing external support from interfering with weighing, characterized in that: The method comprises: Step S1, placing the object to be weighed on the storage tray of the weighing instrument; wherein the weighing instrument includes the storage tray, the lower part of the storage tray is connected to the force-bearing end of the weighing sensor, and the weighing sensor is electrically connected to the weighing display instrument; the weighing instrument also includes a counterweight adding mechanism; Step S2, obtaining a first weighing result m1 of the weighing instrument on the object to be weighed, and saving the first weighing result m1; Step S3: Control the weight adding mechanism to add a first preset weight m to the object to be weighed. s A counterweight block is provided, and a second weighing result m2 of the object to be weighed by the weighing instrument is obtained; wherein the weight of the counterweight block is less than the weight of the object to be weighed; Step S4: Determine whether the second weighing result m2 is the sum of the first weighing result m1 and the first preset weight m s If yes, control the weighing display instrument to display the first weighing result m1; if no, proceed to step S5; Step S5: according to the first weighing result m1, the second weighing result m2 and the first preset weight m s , get the corrected weighing result m f ; Wherein, the corrected weighing result m f satisfy Step S6: Control the weighing display instrument to display the corrected weighing result m f ; Wherein, after step S2, the method further comprises: Step A, controlling the transport mechanism to transport the storage tray to drive the object to be weighed to rise or fall; wherein the transport mechanism is arranged between the storage tray and the force-bearing end of the weighing sensor; Step B, obtaining the third weighing result m3 of the object to be weighed by the weighing instrument, and determining whether the third weighing result m3 is equal to the first weighing result m1; if they are equal, controlling the weighing display instrument to display the first weighing result m1; if they are not equal, issuing a reminder to enable the user to adjust the placement of the object to be weighed.

2. The weighing method for preventing external support from interfering with the weighing according to claim 1, characterized in that: After step S2, the method further comprises: Step C: energize the electromagnetic weight connected to the bottom of the storage tray to increase the electromagnetic weight by a second preset weight m. k , and obtain a fourth weighing result m4 of the object to be weighed by the weighing instrument; Step D: Determine whether the fourth weighing result m2 is the sum of the first weighing result m1 and the second preset weight m k If yes, the weighing display instrument is controlled to display the first weighing result m1; if not, a reminder is issued to enable the user to adjust the placement of the object to be weighed.

3. The weighing method for preventing external support from interfering with the weighing according to claim 1, characterized in that: In the step S3, the bottom surface of the counterweight block is provided with Velcro, and the counterweight block is adhered to the object to be weighed through the Velcro provided on the bottom surface, and the counterweight block is only connected to the object to be weighed.

4. The weighing method for preventing external support from interfering with the weighing according to claim 1, characterized in that: The counterweight adding mechanism includes a transport unit and an electromagnetic adsorption unit connected to the transport unit, and step S3 includes: Step S301, powering the electromagnetic adsorption unit so that the electromagnetic adsorption unit adsorbs the counterweight block; wherein the counterweight block is made of metal; Step S302: Control the transport unit to transport the counterweight to the object to be weighed, and cancel the power supply to the electromagnetic adsorption unit, so that the counterweight falls on the object to be weighed.

5. The weighing method for preventing external support from interfering with the weighing according to claim 1, characterized in that: The step S3 specifically includes: The mechanical arm controlling the counterweight adding mechanism grasps the counterweight block, and transports the counterweight block to be placed on the object to be weighed; wherein the counterweight adding mechanism is a mechanical arm type transport structure, and transports by grasping and rotating.

6. The weighing method for preventing external support from interfering with the weighing according to claim 1, characterized in that: The placement surface of the storage tray is made of frosted material, which is used to increase the friction with the object to be weighed and prevent the object to be weighed from sliding.

7. The weighing method for preventing external support from interfering with the weighing according to claim 1, characterized in that: After step S6, the method further comprises: The counterweight adding mechanism is controlled to remove the counterweight block on the object to be weighed.

8. The weighing method for preventing external support from interfering with the weighing according to claim 1, characterized in that: The weight of the counterweight block is no greater than the weight of the object to be weighed.

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