CN216899202U - Weighing pan and mass comparator with same - Google Patents
Weighing pan and mass comparator with same Download PDFInfo
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- CN216899202U CN216899202U CN202122457996.7U CN202122457996U CN216899202U CN 216899202 U CN216899202 U CN 216899202U CN 202122457996 U CN202122457996 U CN 202122457996U CN 216899202 U CN216899202 U CN 216899202U
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Abstract
The utility model discloses a weighing pan and a mass comparator with the same, which are used for reducing the mass value of a weight to be detected loaded on the mass comparator, thereby realizing the verification of a large-mass weight by using the mass comparator with a small division value with a smaller load. The method comprises the following steps: the first scale pan is positioned on the first plane, is an annular scale pan and is used for placing a first weight; the second scale pan is fixed through a connecting rod perpendicular to the first plane and used for placing a second weight; the projection of the second scale on the first plane is positioned in an inner circle area formed by the projection of the first scale on the first plane; the lever component comprises a plurality of levers, each lever comprises a supporting rod and a fulcrum connected with the supporting rod vertically, the first scale pan is connected with one end of the supporting rod, the second scale pan is connected with the other end of the supporting rod, and the first scale pan and the second scale pan are located on two sides of the fulcrum.
Description
Technical Field
The utility model relates to the technical field of metering detection, in particular to a weighing pan and a mass comparator with the same.
Background
The verification/calibration of the weight needs to be executed according to the national metrological verification code JJJG 99-2006 weight verification code, and whether the low-grade weight is qualified or not and the actual quality value of the low-grade weight are determined by comparing the high-grade weight with the low-grade weight. In practical application, the actual mass value of the detected weight is determined by comparing the difference value of the mass value between the detected weight and the standard weight of the high grade corresponding to the weight grade of the detected weight. When comparing the difference value between the mass values of the detected weight and the standard weight, a measuring instrument, such as a mechanical balance, an electronic balance or a mass comparator, is required.
However, in the measurement of the difference, the maximum weighing of a mechanical balance, an electronic balance or a mass comparator is generally required to be larger than the mass of the weight to be measured, the minimum division value is far smaller than the maximum allowable error of the weight to be measured, and particularly, for the weight with a high accuracy level, the division number (the division number is the maximum weighing/division value) is required to be extremely large to meet the measurement requirement. The mechanical balance which can meet corresponding requirements has poor stability and applicability, is basically eliminated, an electronic balance or a mass comparator is restricted by the technical level of a sensor, the measurement stability is poor, the manufacturing cost is high, and the domestic production capacity is not available.
SUMMERY OF THE UTILITY MODEL
The utility model provides a weighing pan and a mass comparator with the weighing pan, which are used for reducing the mass value of a weight to be detected loaded on the mass comparator, thereby realizing the verification of a large-mass weight by using the mass comparator with low load and small division value.
In a first aspect, an embodiment of the present invention provides a weighing pan, including:
the first scale pan is positioned on the first plane, is an annular scale pan and is used for placing a first weight;
the second scale pan is fixed through a connecting rod perpendicular to the first plane and used for placing a second weight; the projection of the second scale on the first plane is positioned in an inner circle area formed by the projection of the first scale on the first plane;
the lever component comprises a plurality of levers, each lever comprises a supporting rod and a fulcrum connected with the supporting rod vertically, the first scale pan is connected with one end of the supporting rod, the second scale pan is connected with the other end of the supporting rod, and the first scale pan and the second scale pan are located on two sides of the fulcrum.
In an alternative embodiment, the second scale is provided with a toothed receptacle, through the gap between adjacent teeth of which the second weight is placed.
As an alternative embodiment, the first weight includes a ring-shaped weight, a projection area of the ring-shaped weight on the first plane is the same as a projection area of the second scale on the first plane, and the first weight represents different masses by different thicknesses.
As an alternative embodiment, the second scale pan comprises a weighing scale pan and a tare scale pan, wherein:
the weighing scale is used for placing a second weight;
the balance scale is connected with the weighing scale through the connecting rod and fixed between the first scale and the weighing scale, the projection of the balance scale on the first plane is located in the projection area of the weighing scale on the first plane, the first scale is connected with one end of the supporting rod, the balance scale is connected with the other end of the supporting rod, and the first scale and the balance scale are located on two sides of the fulcrum.
In an alternative embodiment, the inner circular area of the first scale pan is larger than the area of the second scale pan; and/or the area of the weighing scale is larger than that of the weighing scale.
As an alternative embodiment, for any one lever, the fulcrum of the lever is mounted on the scale body plane of the mass comparator.
As an alternative embodiment, the lever is a fixed ratio lever including an equiarm lever.
As an alternative embodiment, a side of the connecting rod close to the first plane is used for connecting a sensor of a mass comparator.
In a second aspect, an embodiment of the present invention provides a mass comparator with the weighing pan, including:
the weighing scale comprises a weighing pan arranged above the scale body plane of the electronic balance;
one side of the connecting rod of the weighing plate, which is close to the first plane, is connected with the sensor connecting part of the mass comparator, and the fulcrum of the lever is fixed on the scale body plane of the mass comparator.
In an alternative embodiment, the fulcrum of the lever is fixed to the scale body plane of the mass comparator by welding or adhesion.
These and other aspects of the present application will be more readily apparent from the following description of the embodiments.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic diagram of a weighing pan according to an embodiment of the present invention;
FIG. 2A is a side plan view of a serrated container according to an embodiment of the present invention;
FIG. 2B is a schematic view of a toothed container on a second scale according to an embodiment of the present invention;
FIG. 3 is a top view of a scale body of a mass comparator according to an embodiment of the present invention;
FIG. 4 is a schematic view of another weighing pan provided in accordance with an embodiment of the present invention;
FIG. 5 is a schematic diagram of a mass comparator having the above-described weighing pan according to an embodiment of the present invention;
fig. 6 is a schematic diagram of another mass comparator with the weighing pan according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "weight grade" and "grade" are used in the present examples to denote the grade of a weight classified in JJG99-2006 "weight verification code".
The application scenario described in the embodiment of the present invention is for more clearly illustrating the technical solution of the embodiment of the present invention, and does not form a limitation on the technical solution provided in the embodiment of the present invention, and it can be known by a person skilled in the art that with the occurrence of a new application scenario, the technical solution provided in the embodiment of the present invention is also applicable to similar technical problems. In the description of the present invention, the term "plurality" means two or more unless otherwise specified.
The verification/calibration of the weight needs to be executed according to the national metrological verification code JJJG 99-2006 weight verification code, and whether the low-grade weight is qualified or not and the actual quality value of the low-grade weight are determined by comparing the high-grade weight with the low-grade weight. The grade of the weight is divided according to JJG99-2006 weight verification regulations, and the grade is E from high to low1、E2、F1、F2、M1、M12、M2、M3. In practiceIn application, the actual mass value of the detected weight is determined by comparing the difference value of the mass value between the detected weight and the high-grade standard weight corresponding to the grade of the detected weight. When comparing the difference value between the mass values of the detected weight and the standard weight, a measuring instrument, such as a mechanical balance, an electronic balance or a mass comparator, is required. When the mechanical balance is used for calibrating the weights, a plurality of swinging points are required to be read manually to calculate the balance position, the working efficiency is low, the influence from the outside is large, the accuracy is not high, the balance is easy to damage, and the balance is basically eliminated at present; when the weight is checked, the linear measurement accuracy of the measuring instrument is not considered, and only the resolution and the measurement repeatability of the measuring instrument are considered, so that the electronic balance or the mass comparator is used for comparison measurement, and when the weight is checked by using the electronic balance or the mass comparator, the electronic balance or the mass comparator is manufactured by adopting the gravity sensor, so that the weights with different specifications (masses) are checked by the gravity sensor of the electronic balance or the mass comparator.
In the verification process of the actual weight, the following requirements are provided for the electronic balance or the mass comparator:
in a first aspect, it is desirable that the electronic balance or mass comparator has a maximum weight not less than the weight mass, for example, a 20kg weight is certified, and the electronic balance or mass comparator has a maximum weight greater than 20 kg.
In a second aspect, for weights of different grades, the minimum division value (minimum resolution) of the electronic balance or mass comparator needs to be much smaller than the maximum allowable error of the weight. The maximum allowable error of the weight refers to a limit value of a difference value between a nominal mass value and a true mass value of the weight specified by JJJG 99-2006 weight verification procedure under a corresponding accuracy grade, for example, the nominal mass value of the weight is 100g, and the maximum allowable error of the weight is +/-0.00016 g, so that the true mass value of the weight is within a range of 100 +/-0.00016 g; furthermore, the maximum allowable error of weights with different grades and different nominal values is different, for example, the maximum allowable error is 100g and the grade is E2The maximum allowable error for a grade of weight is 0.16mg, while the nominal value is 100g and the grade is F2The maximum allowable error of the graded weight is + -1.6 mg. The maximum allowable error of the weight is fixed, subject to the nominal value and the weight grade.
The electronic balance or the mass comparator is only used as a measuring tool in the process of verifying the weight and is used for determining the difference value of the mass values of the standard weight and the detected weight, but the minimum division value of the electronic balance or the mass comparator is required to be smaller than the maximum allowable error of the detected weight, for example, the maximum allowable error of the detected weight is +/-1.6 mg, so that the minimum division value of the electronic balance or the mass comparator is required to reach 0.1mg, and if the minimum division value of the electronic balance or the mass comparator can only reach 1mg, the weight with the maximum allowable error of +/-1.6 mg cannot be verified.
In the third aspect, the measurement repeatability of the electronic balance or the mass comparator is smaller than the maximum allowable error of the weight to be tested. The repeatability refers to the consistency of the results obtained by measuring the weight to be tested by using an electronic balance or a mass comparator for multiple times.
Since the electronic balance or the mass comparator needs to satisfy the above three requirements to verify the weight, in practical applications, it is often necessary to perform the verification of the weight by using the electronic balance or the mass comparator having a large maximum weight and a small division value, for example, an electronic balance or a mass comparator having a large maximum weight of 20kg and a division value of 1mg, or an electronic balance or a mass comparator having a large division number (division number is the maximum weight/division value) such as a maximum weight of 5000g and a division value of 0.1 mg. In the production of an actual electronic balance or a mass comparator, the weighing is usually difficult to be extremely large, and the division value is extremely small. In addition, since the electronic balance or the mass comparator performs mass detection by using the gravity sensor, even a small change in the temperature of the sensor after the electronic balance or the mass comparator is powered on has a great influence on the stability of the electronic balance or the mass comparator, and thus it is difficult to ensure the stability of the electronic balance or the mass comparator when the number of divisions is great. At present, most manufacturers cannot produce electronic balances or mass comparators with extremely large division numbers, although few manufacturers can produce the electronic balances or the mass comparators, the electronic balances or the mass comparators are expensive, and small changes of the temperature of the sensor have great influence on the stability of the electronic balances or the mass comparators when the division numbers are extremely large, so that the stability of the electronic balances or the mass comparators during weight detection is difficult to ensure.
Because when carrying out the check of weight, rely on the performance of electronic balance or mass comparator's gravity sensor completely, the weight of examination big mass just needs to use the higher sensor of performance, if the sensor can't satisfy the performance requirement, then just can not carry out the examination of weight to, because the mass influence of balance pan self, can lead to that the scope that the sensor of electronic balance or mass comparator can actually weigh diminishes, reduce the maximum quality value that the sensor can detect, be unfavorable for the examination/calibration to the weight.
The embodiment of the utility model provides a weighing pan which can reduce the mass value of a weight to be detected loaded on an electronic balance or a mass comparator, so that the electronic balance or the mass comparator with smaller weight can be used for detecting the weight with larger mass. In practical situations, the division value of the electronic balance or the mass comparator which is smaller in weighing is also relatively smaller, and since the weighing scale provided by the embodiment can reduce the mass of the weight to be detected which is loaded on the sensor of the electronic balance or the mass comparator, the electronic balance or the mass comparator which is smaller in division value can be used for detecting the weight with large mass, the dependence degree on the sensor of the electronic balance or the mass comparator is greatly reduced, the manufacturing cost of the mass comparator for weight verification and calibration can be effectively reduced, and meanwhile, due to the use of the electronic balance or the mass comparator which is smaller in small range and small division value, compared with the traditional electronic balance or the mass comparator which is used for verifying the weight with the same mass, the division number of the required sensor is smaller, and the stability and the repeatability are easier to be ensured.
The weighing scale that this embodiment provided, including first scale dish, second scale dish to first scale dish and second scale dish pass through lever assembly and connect, and the core thought of design is with the decurrent gravity of loading on first scale dish, utilizes lever principle to convert ascending resistance into and acts on the second scale dish, thereby reduces the decurrent gravity that loaded weight acted on electronic balance or mass comparator on the second scale dish.
As shown in fig. 1, the present embodiment provides a structural schematic diagram of a weighing pan, including:
the first scale pan 101 is positioned on the first plane, is an annular scale pan and is used for placing a first weight;
alternatively, the first plane may be a horizontal plane. The first scale 101 is ring-shaped, and the first weight placed on the first scale 101 is ring-shaped, that is, the first weight is ring-shaped, and in the implementation, the first weights with different masses can be represented by different thicknesses. And the projection area of the annular weight on the first plane is the same as that of the second scale on the first plane.
The second scale pan 102 is fixed by a connecting rod 102a vertical to the first plane and used for placing a second weight; the projection of the second scale on the first plane is positioned in an inner circle area formed by the projection of the first scale on the first plane;
in practice, since the first scale 101 is an annular scale, the projection of the first scale 101 on the first plane is also annular, and an inner circle region is formed inside the annular projection, and the projection of the second scale 102 on the first plane is located in the inner circle region.
In the implementation, the first scale pan 101 and the second scale pan 102 are parallel to each other in the direction of the connecting rod 102a, and the connecting rod 102a is connected to the first scale pan 101 at a position far from the first plane.
Optionally, the second scale 102 may have various shapes such as a circle, a square, an ellipse, etc., the shape of the second scale 102 is not limited too much, and the area of the second scale 102 is smaller than the inner circle area of the first scale 101, for example, when the second scale 102 is a circle, the diameter of the second scale 102 is smaller than the inner circle area of the first scale 101.
In the implementation, the effect that the power that first weight was applyed on the electronic scale passes through lever assembly 103, counteracts the power that the second weight was applyed on the electronic scale to utilize first weight to reduce the gravity of second weight loading on electronic balance or mass comparator, so that when carrying out the examination to the second weight, can utilize the electronic balance or the mass comparator of less weighing range to realize the examination to exceeding the weight of the great mass of this weighing range.
In some embodiments, for better cooperation with the toothed mechanical arm for placing the weights, a toothed receptacle may be further provided on the second scale pan 102 for placing the second weight through the gap between adjacent teeth of the toothed receptacle, so that the toothed mechanical arm can be used for simultaneously placing a plurality of second weights in the corresponding gaps. As shown in fig. 2A, a side plan view of the toothed container provided in this embodiment is shown. As shown in fig. 2B, the toothed receptacle is disposed on the second scale 102.
The lever assembly 103 comprises a plurality of levers, each lever comprises a supporting rod and a fulcrum perpendicularly connected with the supporting rod, the first scale pan 101 is connected with one end of the supporting rod, the second scale pan 102 is connected with the other end of the supporting rod, and the first scale pan 101 and the second scale pan 102 are located on two sides of the fulcrum.
In an embodiment, the first scale pan 101 and the second scale pan 102 are connected to any one of the levers by a plurality of levers in the lever assembly 103, the first scale pan 101 is connected to one end of the lever, the second scale pan 102 is connected to the other end of the lever, the first scale pan 101 and the second scale pan 102 are respectively located on both sides of a fulcrum of the lever, and the first scale pan 101 and the second scale pan 102 are connected to each lever by the connection method. Wherein the lever assembly 103 includes, but is not limited to, 3 levers or more than 3 levers.
Since the first scale pan 101 and the second scale pan 102 are connected by a lever, based on the lever principle, the acting force (i.e. downward gravity) generated by the first weight applied on the first scale pan 101 is converted into the acting force in the opposite direction (i.e. upward resistance) by the lever principle, and acts on the gravity generated by the second weight on the second scale pan 102, at this moment, the electronic balance or the mass comparator can actually measure the gravity of the second weight, which is the gravity of the second weight-the resistance generated by the first weight, so that the gravity of the second weight to be verified on the loading electronic balance or the mass comparator is reduced.
In some embodiments, for any one lever, the fulcrum of the lever is mounted on the scale body plane of the electronic balance or mass comparator, the first scale 101 is fixed by a plurality of levers, and the first scale 101 is located in a first plane parallel to the scale body plane of the electronic balance or mass comparator. In the implementation, the balance body of electronic balance or mass comparator includes one deck detachable aluminum plate all around, and the fulcrum of lever is direct to be fixed on this layer of aluminum plate through the mode of welding or adhesion, and guarantees not to contact electronic balance or mass comparator's sensor, guarantees that electronic balance or mass comparator's balance body plane intensity meets the requirements.
In some embodiments, the lever in this embodiment is an equal-arm lever, and may also be an unequal-arm lever, which is not limited in this embodiment.
In some embodiments, to mount the scale pan on an electronic balance or mass comparator, one side of the connecting rod 102a (understood to be the bottom of the connecting rod 102 a) is positioned adjacent to the first plane (first scale pan 101) for connection to a sensor of the electronic balance or mass comparator. In an embodiment, the scale body plane of the electronic balance or the mass comparator is provided with a sensor connecting portion (e.g. a recessed portion) for inserting the connecting rod 102a into the sensor connecting portion to fix the connecting rod 102a and the second scale pan, and the mass of the second scale pan and the second weight on the second scale pan can be detected by the sensor. As shown in fig. 3, the top view of the scale body of the electronic balance or the mass comparator provided in this embodiment includes a sensor connecting portion 300, which is used to fix the second scale 102 on the scale body of the electronic balance or the mass comparator after being combined with the connecting rod 102a, and detect the mass of the second weight on the second scale 102.
In some embodiments, as shown in fig. 4, the present embodiment also provides another weighing pan, comprising:
the first scale pan 101 is positioned on the first plane, is an annular scale pan and is used for placing a first weight; the first plane is a horizontal plane, the first weights are annular weights, and in implementation, the first weights with different masses can be represented through different thicknesses. And the projection area of the annular weight on the first plane is the same as that of the second scale on the first plane.
A second scale pan 400 comprising a weighing scale pan 400a and a tare scale pan 400b, wherein:
the weighing scale 400a is used for placing a second weight;
the balance scale 400b is connected with the weighing scale 400a through the connecting rod and fixed between the first scale 101 and the weighing scale 400a, the projection of the balance scale 400b on the first plane is located in the projection area of the weighing scale 400a on the first plane, the first scale 101 is connected with one end of the supporting rod, the balance scale 400b is connected with the other end of the supporting rod, and the first scale 101 and the balance scale 400b are located on two sides of the fulcrum.
The scale pan 101 is an annular scale pan, and thus the projection of the first scale pan 101 onto the first plane is also annular, and thus an inner circular area is formed within the annular projection, and the projections of the weighing scale pan 400a and the tare scale pan 400b of the second scale pan 400 onto the first plane are both located within the inner circular area. In the direction of the connecting rod 102a, the first scale pan 101 and the second scale pan 400 are in a vertical parallel relationship, the weighing scale pan 400a and the balancing scale pan 400b are in a vertical parallel relationship, and the part of the connecting rod 102a far away from the first plane is sequentially connected with the balancing scale pan 400b and the weighing scale pan 400 a.
In implementation, the force that first weight was applyed on electronic balance or mass comparator passes through the effect of lever subassembly 103, converts to resistance (reaction force) and acts on the tare scale 400b, and through the resistance that acts on tare scale 400b, acts on the force that the second weight was applyed on weigh scale 400a with this resistance, thereby utilizes first weight to reduce the quality of second weight, so that when carrying out the examination to the second weight, can utilize the electronic scale of less weighing range to realize the examination to exceeding the weight of the great mass of this weighing range.
In some embodiments, a toothed receptacle may also be provided on the weighing scale pan 400a of the second scale pan 400 for placing the second weight through the gap between adjacent teeth of the toothed receptacle.
The balance scale pan 400b is connected with the connecting rod 102a and fixed between the first scale pan 101 and the weighing scale pan 400a, and the projection of the balance scale pan 400b on the first plane is positioned in the projection area of the weighing scale pan 400a on the first plane;
in this embodiment, the weighing scale 400a is connected to a portion away from the first plane and the tare scale 400b is connected to a portion close to the first plane in the direction of the connecting rod 102a, that is, the weighing scale 400a, the tare scale 400b, and the first scale 101 are arranged in this order from the top to the bottom of the connecting rod 102 a.
In some embodiments, because the first scale pan 101 is an annular scale pan, the inner circular area of the first scale pan 101 is larger than the areas of the weighing scale pan 400a, the counterbalancing scale pan 400 b; and/or the area of the weighing scale pan 400a is greater than the area of the tare scale pan 400 b. In operation, no weight is placed on the counterweight scale 400b, and the counterweight scale 400b is configured to be coupled to the first scale 101 via the lever assembly 103, such that an acting force applied to the first scale 101 is converted into a resistance force via the lever assembly 103, and the resistance force is applied to the weighing scale 400a via the counterweight scale 400 b.
In some embodiments, for any one lever, the fulcrum of the lever is mounted on the scale body plane of the electronic balance or mass comparator, the first scale 101 is fixed by a plurality of levers, and the first scale 101 is located in a first plane parallel to the scale body plane of the electronic balance or mass comparator.
In some embodiments, the lever in this embodiment is a lever with a fixed ratio, that is, an equal-arm lever, or an unequal-arm lever, which is not limited in this embodiment.
In some embodiments, to mount the scale pan on an electronic balance or mass comparator, one side of the connecting rod 102a (understood to be the bottom of the connecting rod 102 a) is positioned adjacent to the first plane (first scale pan 101) for connection to a sensor of the electronic balance or mass comparator. In implementation, a recessed portion is disposed on a scale body plane of the electronic balance or the mass comparator, and the connecting rod 102a is inserted into the recessed portion to fix the connecting rod 102a and the second scale pan.
As shown in FIG. 5, the embodiment of the present invention also provides a mass comparator having the weighing pan (note: after using the weighing pan, the weighing pan has no direct weighing capability, and only can compare the measurement, so the weighing pan is collectively called as the mass comparator), comprising:
a scale body 500 of the mass comparator;
a weighing pan 501 disposed above the scale body 500 plane of the mass comparator; one side of the connecting rod 102a of the weighing pan 501 close to the first plane is connected with a sensor connecting part of the mass comparator, and a fulcrum of a lever in the weighing pan 501 is fixed on a scale body plane of the mass comparator.
In some embodiments, weighing pan 501, comprises:
the first scale pan 101 is positioned on the first plane, is an annular scale pan and is used for placing a first weight;
the second scale pan 102 is fixed by a connecting rod 102a vertical to the first plane and used for placing a second weight; the projection of the second scale on the first plane is positioned in an inner circle area formed by the projection of the first scale on the first plane;
the lever assembly 103 comprises a plurality of levers, each lever comprises a supporting rod and a fulcrum perpendicularly connected with the supporting rod, the first scale pan 101 is connected with one end of the supporting rod, the second scale pan 102 is connected with the other end of the supporting rod, and the first scale pan 101 and the second scale pan 102 are located on two sides of the fulcrum.
In some embodiments, the fulcrum of the lever in the weighing pan 501 is fixed to the scale body plane of the electronic balance by welding or adhesion.
As shown in fig. 6, another mass comparator with the weighing pan according to the embodiment of the present invention includes:
a scale body 600 of the mass comparator;
a weighing pan 601 placed above the plane of the scale body 600 of the mass comparator; one side of the connecting rod 102a of the weighing pan 601 close to the first plane is connected with a sensor connecting part of the mass comparator, and a fulcrum of a lever in the weighing pan 601 is fixed on a scale body plane of the mass comparator.
In some embodiments, a weighing pan 601, comprises:
the first scale pan 101 is positioned on the first plane, is an annular scale pan and is used for placing a first weight;
a second scale pan 400 comprising a weighing scale pan 400a and a tare scale pan 400b, wherein:
the weighing scale 400a is used for placing a second weight;
the balance scale 400b is connected with the weighing scale 400a through the connecting rod and fixed between the first scale 101 and the weighing scale 400a, the projection of the balance scale 400b on the first plane is located in the projection area of the weighing scale 400a on the first plane, the first scale 101 is connected with one end of the supporting rod, the balance scale 400b is connected with the other end of the supporting rod, and the first scale 101 and the balance scale 400b are located on two sides of the fulcrum.
In some embodiments, the fulcrum of the lever in the weighing pan 601 is fixed to the scale body plane of the mass comparator by welding or gluing.
In the embodiment, the mass comparator with the weighing plate is adopted to realize the verification of the large-mass weight exceeding the weighing range of the mass comparator, the weight to be detected can be loaded on the sensor of the mass comparator in a mode of reducing the mass value of the weight to be detected, the large-mass weight is loaded on the sensor of the mass comparator with a small measuring range (small division value), and the verification of the weight is realized in a mode of comparing the weight with a high-grade standard weight. In the verification process, a standard weight is usually placed on an electronic balance or a mass comparator having the weighing pan, for example, the standard weight shows a mass of a 1-100.0000 g, then the standard weight is removed and the detected weight is placed on the electronic balance or the mass comparator, the detected weight shows a mass of B100.0002 g, the standard weight is replaced with the detected weight, the detected weight shows a mass of a 2-100.0000 g, and then the difference between the detected weight and the standard weight is calculated as B- (a1+ a2)/2, so that the verification of the detected weight is completed once, and the verification may be repeated 1 to 3 times according to actual needs. Because the weight verification adopts a comparative measurement method, verification and calibration results are not influenced under the condition that the force subtracted when the standard weight and the detected weight are loaded on the sensor is equal in an external balance mode (namely, the acting force of the first weight is applied on the first scale and is converted into the reaction force through the lever).
In some embodiments, the second scale is a loading position of the standard weight and the detected weight, that is, the second weight in this embodiment includes but is not limited to at least one of the standard weight and the detected weight, and a downward force is generated to act on the sensor after the second weight is loaded; first scale dish is annular scale dish, and the decurrent power of first weight of loading on first scale dish converts ascending power through the lever of certain proportion to act on the second scale dish to reduce the loaded second weight of second scale dish and act on the power on the sensor. For example: the sensor of the electronic balance weighs 200g at maximum, the second weight is 2000g (including the detected weight, the standard weight is 2000g), and can not be directly loaded on the sensor of the electronic balance, then load 1800g of the first weight (annular weight) on the first scale, here assume that the levers in the lever assembly are all equal-arm levers, the downward force finally loaded on the sensor of the electronic balance is equal to the force (2000g) generated by the mass of the second weight minus the acting force (1800g) loaded on the first scale, that is, the downward force finally acting on the sensor can reach the sensor measuring range, the actual mass loaded on the sensor is 200g, the sensor weighing range is satisfied, and the large-mass weight can be measured by the small-range sensor.
Because the traditional electronic balance (mass comparator) that uses at present relies on sensor performance completely when examining the weight, examine big weight, just need use big sensor, this embodiment can reduce the degree of dependence to the sensor, effectively reduces the manufacturing cost who is used for the mass comparator of weight examination, calibration. Meanwhile, compared with the traditional electronic balance (an electronic balance evaluated by a verification weight), the sensor used in the embodiment has the advantages that the division number of the required sensor is smaller, and the stability and the repeatability are easier to ensure.
The effort and the lever principle of the first weight of loading on this embodiment through first scale realizes that the small-scale range sensor is examined and determine, the big mass weight of calibration, also can use on the transformation to other electronic balance, for example when installing heavier dysmorphism scale influence balance scope, can adopt the influence that the weighing scale reduced the quality in this embodiment.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the utility model. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A weighing pan, comprising:
the first scale pan is positioned on the first plane, is an annular scale pan and is used for placing a first weight;
the second scale pan is fixed through a connecting rod perpendicular to the first plane and used for placing a second weight; the projection of the second scale on the first plane is positioned in an inner circle area formed by the projection of the first scale on the first plane;
the lever assembly comprises a plurality of levers, each lever comprises a supporting rod and a fulcrum perpendicularly connected with the supporting rod, the first scale is connected with one end of the supporting rod, the second scale is connected with the other end of the supporting rod, and the first scale and the second scale are located on two sides of the fulcrum.
2. The weighing pan of claim 1, wherein said second pan is provided with a toothed receptacle for receiving said second weight through a gap between adjacent teeth of said toothed receptacle.
3. The weighing pan of claim 1, wherein the first weight comprises a ring-shaped weight having a projected area in a first plane that is the same as a projected area of the second scale in the first plane, the first weight representing different masses by different thicknesses.
4. The weighing pan of claim 1, wherein the second pan comprises a weighing pan and a tare pan, wherein:
the weighing scale is used for placing a second weight;
the balance scale is connected with the weighing scale through the connecting rod and fixed between the first scale and the weighing scale, the projection of the balance scale on the first plane is located in the projection area of the weighing scale on the first plane, the balance scale is connected with the other end of the supporting rod, and the first scale and the balance scale are located on two sides of the fulcrum.
5. The weighing pan of claim 4, wherein the first pan has an inner circular area that is larger than the area of the second pan; and/or the area of the weighing scale is larger than that of the tare scale.
6. A weighing pan according to any one of claims 1 to 5 wherein, for any one lever, the fulcrum of the lever is mounted in the scale body plane of the mass comparator.
7. A weighing pan according to any one of claims 1 to 5 wherein the levers are fixed ratio levers.
8. A weighing pan as claimed in any one of claims 1 to 5 wherein the side of the connecting rod adjacent the first plane is adapted for connection to a sensor of a mass comparator.
9. A mass comparator having a weighing pan according to any one of claims 1 to 8, including the weighing pan disposed above the scale body plane of the mass comparator;
one side of the connecting rod of the weighing plate, which is close to the first plane, is connected with the sensor connecting part of the mass comparator, and the fulcrum of the lever is fixed on the scale body plane of the mass comparator.
10. The mass comparator as claimed in claim 9, wherein the fulcrum of the lever is fixed to the scale body plane of the mass comparator by welding or adhesion.
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| CN202122457996.7U CN216899202U (en) | 2021-10-12 | 2021-10-12 | Weighing pan and mass comparator with same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113984170A (en) * | 2021-10-12 | 2022-01-28 | 北京优量云产业计量技术创新研究院有限公司 | Weighing pan and mass comparator with same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113984170A (en) * | 2021-10-12 | 2022-01-28 | 北京优量云产业计量技术创新研究院有限公司 | Weighing pan and mass comparator with same |
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