CN109632068B - Detection device and method for weighing sensor - Google Patents
Detection device and method for weighing sensor Download PDFInfo
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- CN109632068B CN109632068B CN201811564090.1A CN201811564090A CN109632068B CN 109632068 B CN109632068 B CN 109632068B CN 201811564090 A CN201811564090 A CN 201811564090A CN 109632068 B CN109632068 B CN 109632068B
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- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/01—Testing or calibrating of weighing apparatus
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Abstract
The embodiment of the invention relates to the field of sensor detection, and discloses a detection device of a weighing sensor. In the present invention, the detection device includes: the turntable comprises a base and a turntable which is rotatably fixed on the base around a rotating axis, wherein the center of gravity of the turntable is not on the rotating axis. The embodiment of the invention also provides a detection method of the weighing sensor. The detection device of the weighing sensor and the detection method of the weighing sensor provided by the invention can improve the detection efficiency of the weighing sensor.
Description
Technical Field
The embodiment of the invention relates to the field of sensor detection, in particular to a detection device and a detection method of a weighing sensor.
Background
A load cell is a device that converts a mass signal into a measurable electrical signal for output, which is used to meter the mass of an object. Some load cells suffer from an off-sensing problem, i.e., when the same object is placed at some point along the edge of the weighing pan of the load cell, the reading may be greater than when placed in a centered position, resulting in a less accurate load cell, which is not compliant with the bureau regulations. In the prior art, in order to detect whether a sensor has an offset sense, weights are usually manually placed at different positions of a weighing tray of a weighing sensor, the readings of the weighing sensor are recorded, the magnitude relation between the readings and the mass of the weights is compared, and only when the weights are placed at any position of the weighing tray and the readings of the weighing sensor and the mass of the weights are equal, the problem of the offset sense of the weighing sensor is judged, and the accuracy is qualified.
The inventor finds that at least the following problems exist in the prior art: the stress point of the weighing plate can be changed by manually moving the position of the weight, so that the operation is inconvenient and the detection efficiency is low.
Disclosure of Invention
The invention aims to provide a detection device and a detection method of a weighing sensor, which can improve the detection efficiency of the weighing sensor.
In order to solve the above technical problem, an embodiment of the present invention provides a detection device for a load cell, including: the turntable comprises a base and a turntable which is rotatably fixed on the base around a rotating axis, wherein the center of gravity of the turntable is not on the rotating axis.
The invention also provides a detection method of the weighing sensor, which comprises the following steps: providing a detection device, wherein the detection device comprises a base and a turntable which is rotatably fixed on the base around a rotation axis, and the gravity center of the turntable is not on the rotation axis; acquiring an actual weighing of the detection device; placing the detection device on a weighing pan of the load cell; reading the weighing readings of the weighing sensor in the rotating process of the turntable; and if the difference value between the weighing index and the actual weighing meets a preset condition, judging that the weighing sensor is qualified.
The invention also provides a detection method of the weighing sensor, which comprises the following steps: providing a detection device, wherein the detection device comprises a base and a turntable which is rotatably fixed on the base around a rotation axis, and the gravity center of the turntable is not on the rotation axis; acquiring an actual weighing of the detection device; placing the detection device on a weighing pan of the load cell; reading the weighing readings of the weighing sensor in the rotating process of the turntable; and if the difference value between the weighing index and the actual weighing meets a preset condition, judging that the weighing sensor is qualified.
The invention also provides a detection method of the weighing sensor, which comprises the following steps: providing a detection device, wherein the detection device comprises a base and a turntable which is rotatably fixed on the base around a rotation axis, and the gravity center of the turntable is not on the rotation axis; acquiring an actual weighing of the detection device; placing the detection device on a weighing pan of the load cell; reading the weighing readings of the weighing sensor in the rotating process of the turntable; and if the difference value between the weighing index and the actual weighing is smaller than a preset threshold value, judging that the weighing sensor is qualified.
Compared with the prior art, the detection device comprises a base and a rotary disc which is rotatably fixed on the base around a rotary axis, the gravity center of the rotary disc is not on the rotary axis, so that the detection device forms an eccentric device, and the gravity center of the detection device is continuously changed along with the rotation of the rotary disc, therefore, in the detection process of the weighing sensor, the stress point on the weighing disc of the weighing sensor can be changed by continuously rotating the rotary disc without manually moving the position of an object on the weighing disc to change the stress point of the weighing disc, the labor consumption is saved, and the detection efficiency of the weighing sensor is improved.
Optionally, the device further comprises a rotating shaft connecting the base and the turntable, and the base and the turntable are rotatably connected through the rotating shaft.
Optionally, the turntable includes a tray and a gravity block disposed on the tray, the rotating shaft is connected to the center of the tray, and the gravity block is disposed at the edge of the tray.
Optionally, the gravity block is detachably arranged on the tray. According to the arrangement, the gravity block can be detached from the edge position and then fixed to the central position, so that the detection device is recombined into a device with the center of gravity on the central shaft, and then the device with the center of gravity on the central shaft is placed at the central position of the weighing plate for weighing, so that the actual weighing of the detection device is obtained and is used as a reference for weighing of the weighing sensor, the actual weighing of the detection device is not required to be obtained through an additional device, and the convenience in detection of the weighing sensor is improved.
Optionally, the rotating shaft is connected with the edge of the tray. By the arrangement, the tray with regular shape and uniform material can be matched with the rotating shaft to form the detection device with the gravity center not on the rotating shaft, and the detection device is simple in structure and low in cost.
Optionally, the tray is further provided with a gravity block, the gravity block is arranged on the tray, and the gravity block and the rotating shaft are respectively located on two sides of the gravity center of the tray. Compared with the arrangement that the gravity block is not arranged on the tray, the gravity center of the detection device is farther away from the axis of the rotating shaft, so that in the rotating process of the rotary disc, the gravity center offset of the detection device is more, whether the weighing is accurate at the stress point in a wider range on the weighing disc can be detected, and the reliability of the detection of the weighing sensor is improved.
Optionally, the method further includes: and the power device is used for driving the tray to rotate relative to the base and is in transmission connection with the rotating shaft. So set up, realized detection device's automatic rotation has further saved the manpower, has improved weighing sensor's detection efficiency.
Optionally, the tray further comprises a bearing, wherein one end of the rotating shaft is connected with the base through the bearing, and the other end of the rotating shaft is fixedly connected with the tray. So set up, can reduce frictional force when the carousel rotates improves detection device at the energy utilization of automatic rotation in-process to reduce the life-span that the part friction brought and reduce and lose.
Optionally, the obtaining of the actual weighing of the detection device specifically includes: and weighing the detection device by using a qualified weighing sensor, and reading the reading of the weighing sensor to be used as actual weighing.
Optionally, the detection device further includes a rotating shaft connecting the base and the turntable, the base and the turntable are rotatably connected via the rotating shaft, the turntable includes a tray and a gravity block disposed on the tray, the rotating shaft is connected to a center of the tray, the gravity block is disposed at an edge of the tray, and the gravity block is detachably disposed on the tray; the actual weighing of the detection device is obtained by: installing the gravity block at the central position of the tray to form a detection device with a first assembly structure, placing the detection device with the first assembly structure on the central position of a weighing disc of the weighing sensor, and reading the reading of the weighing sensor to be used as actual weighing; the detection device is placed on a weighing tray of the weighing sensor, and the detection device specifically comprises the following components: and mounting the gravity block at the edge position of the tray to form a detection device with a second assembly structure, and placing the detection device with the second assembly structure on a weighing tray of the weighing sensor.
Optionally, the provided detection device further includes a rotating shaft connecting the base and the turntable, the base and the turntable are rotatably connected via the rotating shaft, the turntable only includes a tray, and the rotating shaft is detachably disposed on the tray; the actual weighing of the detection device is obtained by: installing the rotating shaft at the central position of the tray to form a detection device with a first assembly structure, placing the detection device with the first assembly structure at the central position of a weighing disc of the weighing sensor, and reading the reading of the weighing sensor to be used as actual weighing; the detection device is placed on a weighing tray of the weighing sensor, and the detection device specifically comprises the following components: and mounting the rotating shaft at the edge position of the tray to form a detection device with a second assembly structure, and placing the detection device with the second assembly structure on a weighing tray of the weighing sensor. So set up, can utilize the shape rule, the even tray cooperation pivot of material to constitute the focus in the pivot have a detection device of first assembly structure and the focus is not in the pivot have a detection device of second assembly structure, its simple structure, with low costs.
Optionally, the placing of the detection device on a weighing pan of the weighing sensor specifically includes: placing the detection device on the weighing platter with the base in a central position of the weighing platter. According to the arrangement, along with the automatic rotation of the rotary disc, the gravity center of the detection device is constantly changed at the periphery of the central position of the weighing disc, so that the problem that the stress point of the weighing disc is always close to one side of the weighing disc and whether the weighing of the stress point of the weighing disc is accurate or not when the stress point of the weighing disc is on the other side cannot be detected is solved, and the detection reliability of the weighing sensor is improved.
Optionally, rotating the turntable specifically includes: the turntable is rotated at least 360 degrees. So set up, can be more comprehensive detect whether weighing of weighing dish is accurate to improve weighing sensor detects's reliability.
Optionally, rotating the turntable and reading the weighing readings of the weighing sensors specifically includes: and in the continuous rotating process of the turntable, acquiring the weighing readings of the current weighing sensor in real time. Due to the arrangement, the detection device continuously rotates, the acting point of the detection device on the weighing disc is continuously changed, and compared with the discrete acting point, the continuous acting point is a larger detection sample, so that the detection precision of the weighing sensor is improved.
Optionally, reading the weighing readings of the weighing sensor in the rotation process of the turntable specifically includes: and acquiring the weighing readings of the current weighing sensor once when the turntable rotates by a preset angle.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a schematic structural view of a detecting device of a load cell according to a first embodiment of the present invention;
fig. 2 is a schematic structural view of a detecting device of a load cell according to a second embodiment of the present invention;
fig. 3 is a flowchart of a detection method of a load cell according to a third embodiment of the present invention;
fig. 4 is a flowchart of a detection method of a load cell according to a fourth embodiment of the present invention;
fig. 5 is a flowchart of a detection method of a load cell according to a fifth embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present invention in its various embodiments. However, the technical solution claimed in the present invention can be implemented without these technical details and various changes and modifications based on the following embodiments.
A first embodiment of the present invention relates to a detection device 100 for a load cell, as shown in fig. 1, including: a base 11, and a turntable 12 rotatably fixed to the base 11 about a rotation axis, the center of gravity of the turntable 12 not being on the rotation axis.
Compared with the prior art, the detection device 100 comprises the base 11 and the rotary disc 12 which is rotatably fixed on the base 11 around the rotation axis, the gravity center of the rotary disc 12 is not on the rotation axis, so that the detection device 100 forms an eccentric device, and the gravity center of the detection device 100 is continuously changed along with the rotation of the rotary disc 12, therefore, in the detection process of the weighing sensor, the stress point on the weighing disc of the weighing sensor can be changed by continuously rotating the rotary disc 12, the stress point on the weighing disc of the weighing sensor does not need to be changed by manually moving the position of an object on the weighing disc, the labor consumption is saved, and the detection efficiency of the weighing sensor is improved.
Specifically, the detecting device 100 further includes a rotating shaft 13 connecting the base 11 and the turntable 12, and the base 11 and the turntable 12 are rotatably connected via the rotating shaft 13.
In this embodiment, the turntable 12 includes a tray 121 and a weight block 122 disposed on the tray 121, the rotating shaft 13 is connected to a center position of the tray 121, and the weight block 122 is disposed at an edge position of the tray 121. The central position of the tray 121 is the geometric center of the tray 121 and the position near the geometric center, and the edge position of the tray 121 is arranged around the central position. Because the gravity block 122 is arranged at the edge of the tray 121, the gravity center of the detection device 100 is not on the axis of the rotating shaft 13, and along with the continuous rotation of the rotating shaft 13, the gravity center of the detection device 100 is continuously changed, so that the weighing tray has different stress points.
Alternatively, the weight block 122 may be detachably disposed on the tray 121. With this arrangement, the detection device 100 can be assembled into a device having a center on the center axis and an eccentric device having a center of gravity different from the center axis by changing the position of the weight block 122. Specifically, the gravity block 122 is disposed at the center position of the tray 121, so that the detection apparatus 100 is recombined into an apparatus having a center of gravity on the central axis, and then weighing is performed by placing the apparatus having a center of gravity on the central axis at the center position of the weighing tray to obtain an actual weighing of the detection apparatus 100, and the actual weighing is used as a reference for weighing by the weighing sensor; then, the gravity block 122 is removed from the center position of the tray 121 and is installed at the edge position of the tray 121, so that the detection device 100 is recombined into an eccentric device with a center of gravity not on the center axis, the eccentric device is placed on the weighing pan of the weighing sensor, the rotary table 12 is rotated and the weighing index of the weighing sensor is read, and whether accurate measurement can be performed by the weighing sensor when the weighing pan has different stress points is detected, that is, whether the weighing sensor is qualified can be detected by one detection device 100 without acquiring the actual weighing of the detection device 100 by an additional device, thereby improving the convenience of detection by the weighing sensor.
It should be noted that the detection apparatus 100 further includes: and a power device (not shown) for driving the tray 121 to rotate relative to the base 11, wherein the power device is in transmission connection with the rotating shaft 13. Specifically, the power device can be a synchronous motor, an asynchronous motor and the like, the power device is in transmission connection with the rotating shaft 13 to drive the rotating shaft 13 to rotate, the tray 121 is driven to rotate relative to the base 11 through the rotating shaft 13, the automatic rotation of the detection device 100 is further realized, the gravity center of the detection device 100 is continuously changed along with the rotation of the detection device 100, the scheme that the weighing tray has different stress points by changing the positions of weights on the weighing tray in the prior art is replaced, the labor is further saved, the detection efficiency of the weighing sensor is improved, meanwhile, the rotary table 12 is driven through the power device, the detection device 100 is continuously rotated, the stress points of the detection device 100 on the weighing tray are continuously changed, a larger detection sample is obtained, and the detection precision of the weighing sensor is improved.
Optionally, the detecting device 100 further includes a bearing (not shown), one end of the rotating shaft 13 is connected to the base 11 via the bearing, and the other end is fixedly connected to the tray 121. Because the rotating shaft 13 is connected with the base 11 through the bearing, the bearing can reduce the friction force between the rotating shaft 13 and the base 11, further reduce the energy loss when the rotating disc 12 rotates, improve the energy utilization rate of the detection device 100 in the automatic rotation process, and reduce the service life loss caused by the friction of components.
A second embodiment of the present invention relates to a detection device 200 of a load cell, as shown in fig. 2, the second embodiment is substantially the same as the first embodiment, the detection device 200 also comprises a base 11 and a turntable 12 rotatably fixed on the base 11 around a rotation axis, the center of gravity of the turntable 12 is not on the rotation axis, and the main difference lies in that: in the first embodiment, the turntable 12 includes a tray 121, and a weight block 122 disposed on the tray 121, wherein the rotation shaft 13 is connected to a central position of the tray 121, and the weight block 122 is disposed at an edge position of the tray 121. In the second embodiment of the present invention, the hinge 13 is connected to an edge position of the tray 121. So set up, the focus of tray 121 is not on the axis of pivot 13, therefore, along with the continuous rotation of pivot 13, the focus of tray 121 constantly changes, lead to detection device 200's focus constantly to change, make detection device 200's the dish of weighing have different stress points, compare in prior art through the position of change weight on the dish of weighing so that the dish of weighing has the scheme of different stress points, the manpower consumption has been saved, the efficiency that weighing sensor detected has been improved, and simultaneously, can utilize the shape rule, the even tray cooperation pivot of material constitutes the focus and is not at the epaxial detection device of changeing, the steam generator is simple in structure, and is low in cost.
Optionally, the tray 121 is further provided with a gravity block 122, the gravity block 122 is disposed on the tray 121, and the gravity block 122 and the rotating shaft 13 are respectively located at two sides of the center of gravity of the tray 121. So set up, detection device 200's focus is farther apart from the axis of pivot 13 for at carousel 12 pivoted in-process, detection device 200's focus offset is more, thereby can detect whether accurate weighing of the stress point department of wider scope on weighing the dish, has improved the reliability that weighing sensor detected.
A third embodiment of the present invention relates to a detection method of a load cell, as shown in fig. 3, including the steps of:
and S11, providing a detection device of the weighing sensor.
Specifically, in this step, the detecting device includes a base 11, and a turntable 12 rotatably fixed to the base 11 about a rotation axis, and the center of gravity of the turntable 12 is not on the rotation axis. It is to be understood that the structures of the detection devices according to the first and second embodiments of the present invention can be applied to the present embodiment, and are not described herein again.
And S12, weighing the detection device by using a qualified weighing sensor, and reading the reading of the qualified weighing sensor to be used as actual weighing.
S13, placing the detection device on a weighing pan of the weighing cell.
Specifically, in the step, the detection device is placed on the weighing disc, the base is located at the center of the weighing disc, and the detection device is arranged in such a way that the gravity center of the detection device is constantly changed around the center of the weighing disc along with the automatic rotation of the turntable 12, so that the problem that the stress point of the weighing disc is always located close to one side of the weighing disc, and whether the weighing of the stress point of the weighing disc at the other side is accurate or not can not be detected is solved, the weighing result of the stress point at each position of the weighing disc can be comprehensively measured, and the reliability of the detection of the weighing sensor is improved.
It will be appreciated that the detection means need not be placed in the centre of the weigh platter, as long as the position of the centre of gravity of the detection means can be changed to change the point of stress on the weigh platter to enable detection by the load cell.
And S14, reading the weighing indication of the weighing sensor in the rotating process of the turntable.
Specifically speaking, in this step, rotate the carousel 360 degrees at least, so set up, can be more comprehensive the detection whether weighing of weighing dish is accurate to improve the reliability that weighing sensor detected.
In the embodiment, the turntable is driven to rotate continuously, and the weighing readings of the current weighing sensor are acquired in real time in the continuous rotation process of the turntable. Due to the arrangement, the detection device continuously rotates, the acting point of the detection device on the weighing disc is continuously changed, and compared with the discrete acting point, the continuous acting point is a larger detection sample, so that the detection precision of the weighing sensor is improved.
It will be appreciated that a weight indication of the current load cell may also be obtained each time the turntable is rotated through a predetermined angle.
Optionally, the turntable 12 is driven by a power device (such as a synchronous motor, an asynchronous motor and the like) to automatically rotate relative to the base 11, so that the automatic rotation of the detection device is realized, the labor is further saved, and the detection efficiency of the weighing sensor is improved.
It can be understood that the technical effect is not affected by manually driving the turntable 12 to rotate relative to the base 11, and the detailed description is omitted here.
And S15, if the difference between the weighing index and the actual weighing meets the preset condition, judging that the weighing sensor is qualified.
Specifically, in this step, if the weighing index is equal to the actual weighing constant or the difference is smaller than the preset threshold during the rotation of the turntable 12, it indicates that the measurement of the load cell is accurate when the stress point of the weighing pan is at each position, and therefore, the load cell can be determined to be qualified.
It will be appreciated that, during rotation of the turntable 12, when the weighing indication of the load cell is not equal to the actual weighing, the weighing indication may be made constant or less than a predetermined threshold value during rotation of the turntable 12 by taking an adjustment (e.g., filing a portion of the metal portion of the sensor body with a file) until the weighing indication there is equal to the actual weighing, i.e., the load cell is a good product.
It should be noted that the condition for determining that the weighing sensor is qualified is not strictly limited to that the weighing index is constantly equal to the actual weighing, and may also be that the difference between the weighing index and the actual weighing is smaller than a preset range, as long as the relevant regulations of the national bureau of measurement are met.
Compared with the prior art, the embodiment of the invention has the advantages that the detection device is provided, the detection device comprises the base 11 and the rotary disc 12 which is rotatably fixed on the base 11 around the rotating axis, the gravity center of the rotary disc 12 is not on the rotating axis, so that the detection device forms an eccentric device, the gravity center of the detection device is continuously changed along with the rotation of the rotary disc 12, in the detection process of the weighing sensor, the stress point on the weighing disc of the weighing sensor is changed by continuously rotating the rotary disc 12, the weighing index of the weighing sensor is read, the weighing index is compared with the obtained actual weighing, and whether the weighing sensor is accurate is further detected.
A fourth embodiment of the present invention relates to a method for detecting a load cell, and is substantially the same as the third embodiment, and mainly differs therefrom in that: in a third embodiment, the test device is weighed using an acceptable load cell, and the reading of the acceptable load cell is taken as the actual weighing. In the fourth embodiment of the invention, the gravity block is arranged at the central position of the tray to form a detection device with a first assembly structure, the detection device with the first assembly structure is placed at the central position of the weighing plate of the weighing sensor, and the reading of the weighing sensor is used as the actual weighing.
As shown in fig. 4, the detection method of the load cell provided in this embodiment specifically includes the following steps:
and S21, providing a detection device of the weighing sensor.
Specifically, in this step, the detection device includes: the turntable comprises a base 11, a turntable 12 which is rotatably fixed on the base 11 around a rotation axis, and a rotating shaft 13 which connects the base 11 and the turntable 12, wherein the center of gravity of the turntable 12 is not on the rotation axis, the base 11 and the turntable 12 are rotatably connected through the rotating shaft 13, wherein the turntable 12 comprises a tray 121 and a gravity block 122 which is arranged on the tray 121, the rotating shaft 13 is connected with the center position of the tray 121, and the gravity block 122 is detachably arranged on the tray 121.
And S22, installing the gravity block at the center of the tray to form a detection device with a first assembly structure, placing the detection device with the first assembly structure at the center of the weighing tray of the weighing sensor, and reading the reading of the weighing sensor to be used as the actual weighing.
Specifically, in this step, the first assembly structure includes the rotating disc 12, the weight block 122, the rotating shaft 13, and the base 11 to form a rotational symmetric structure, and the center of gravity is located on the rotational symmetric axis, in this embodiment, specifically, the tray 121 is a rotational symmetric disc, the weight block 122 may be a rotational symmetric rectangular parallelepiped block (or a cylinder, etc.), the rotating shaft 13 is a rotational symmetric axis, and the base 11 is a rotational symmetric disc, that is, the rotational symmetric axis of the whole detection apparatus is the central axis of the rotating shaft. The detection device with the first assembly structure is placed in the central position of the weighing pan of the weighing cell, that is to say the center of gravity of the first assembly structure is aligned in the vertical direction with the center of the weighing pan and the axis of rotation of the first assembly structure extends in the vertical direction. Therefore, the stress point on the weighing tray is the center of the weighing tray, so the indication number at this time is the actual weight of the detection device, and the actual weighing can be realized.
And S23, mounting the rotating shaft at the edge position of the tray to form a detection device with a second assembly structure, and placing the detection device with the second assembly structure on a weighing tray of the weighing sensor.
Specifically, in this step, the second assembly structure is that the center of gravity of the rotary table 13 is not located on the rotation axis, so as to form an eccentric structure, and therefore, as the rotary table 13 rotates continuously, the center of gravity of the detection device changes continuously, so that the weighing plate has different stress points, and thus the accuracy of weighing at different positions on the weighing plate to detect the weighing sensor is realized.
And S24, reading the weighing readings of the weighing sensors in the rotating process of the turntable.
And S25, if the difference between the weighing index and the actual weighing meets the preset condition, judging that the weighing sensor is qualified.
Steps S24 and S25 in this embodiment are substantially the same as steps S14 and S15 in the third embodiment, and are not described again here.
Compared with the prior art, the embodiment of the invention combines the detection device into a device with the center on the central axis and an eccentric device with the center off the central axis by changing the position of the gravity block 122. Specifically, the gravity block 122 is disposed at the center position of the tray 121, so that the detection device is recombined into a device with the center of gravity on the central axis, and then the device with the center of gravity on the central axis is placed at the center position of the weighing tray for weighing, so as to obtain the actual weighing of the detection device, and the actual weighing is used as the weighing reference of the weighing sensor; then the gravity block 122 is taken down from the center position of the tray 121 and is installed at the edge position of the tray 121, thereby recombining the detection device into an eccentric device with the gravity center not on the center shaft, placing the eccentric device on the weighing plate of the weighing sensor, rotating the rotary disc 12 and reading the weighing index of the weighing sensor, and further detecting whether the weighing sensor can accurately measure when the weighing plate has different stress points, that is, whether the weighing sensor is qualified can be detected by one detection device, and the actual weighing of the detection device is not required to be obtained by an additional device, thereby improving the convenience of the detection of the weighing sensor.
A fifth embodiment of the present invention relates to a method for detecting a load cell, and is substantially the same as the fourth embodiment, and mainly differs therefrom in that: in the fourth embodiment, the turntable 12 includes a tray 121, and a weight block 122 disposed on the tray 121, the rotating shaft 13 is connected to a central position of the tray 121, and the weight block 122 is detachably disposed on the tray 121. In the fifth embodiment of the present invention, the turntable 12 includes only the tray 121, and the rotary shaft 13 is detachably coupled to the center position and the edge position of the tray 121. The detection device with the gravity center not on the rotating shaft is formed by matching the trays with regular shapes and uniform materials with the rotating shaft, and has the advantages of simple structure and low cost.
As shown in fig. 5, the detection method of the load cell provided in this embodiment specifically includes the following steps:
and S31, providing a detection device of the weighing sensor.
Specifically, in this step, the detection device includes: the rotary table comprises a base 11, a rotary table 12 rotatably fixed on the base 11 around a rotation axis, and a rotary shaft 13 connecting the base 11 and the rotary table 12, wherein the center of gravity of the rotary table 12 is not on the rotation axis, the base 11 and the rotary table 12 are rotatably connected through the rotary shaft 13, wherein the rotary table 12 comprises a tray 121, and the rotary shaft 13 is detachably connected with the central position and the edge position of the tray 121.
And S32, mounting the rotating shaft at the central position of the tray to form a detection device with a first assembly structure, placing the detection device with the first assembly structure at the central position of the weighing tray of the weighing sensor, and reading the reading of the weighing sensor to be used as the actual weighing.
Specifically, in this step, the first assembly structure includes the rotating disc 12, the rotating shaft 13, and the base 11 to form a rotational symmetry structure, and the center of gravity is located on the rotational symmetry axis. The detection device with the first assembly structure is placed in the central position of the weighing pan of the weighing cell, that is to say the center of gravity of the first assembly structure is aligned in the vertical direction with the center of the weighing pan and the axis of rotation of the first assembly structure extends in the vertical direction. Therefore, the stress point on the weighing tray is the center of the weighing tray, so the indication number at this time is the actual weight of the detection device, and the actual weighing can be realized.
And S33, mounting the rotating shaft at the edge position of the tray to form a detection device with a second assembly structure, and placing the detection device with the second assembly structure on a weighing tray of the weighing sensor.
Specifically, in this step, the second assembly structure is that the center of gravity of the rotary table 13 is not located on the rotation axis, so as to form an eccentric structure, and therefore, as the rotary table 13 rotates continuously, the center of gravity of the detection device changes continuously, so that the weighing plate has different stress points, and thus the accuracy of weighing at different positions on the weighing plate to detect the weighing sensor is realized.
And S34, reading the weighing indication of the weighing sensor in the rotating process of the turntable.
And S35, if the difference between the weighing index and the actual weighing meets the preset condition, judging that the weighing sensor is qualified.
Steps S34 and S35 in this embodiment are substantially the same as steps S24 and S25 in the third embodiment, and are not described again here.
Compared with the prior art, the embodiment of the invention combines the detection device into a device with the center on the central axis and an eccentric device with the center of gravity not on the central axis by changing the position of the rotating shaft 13 mounted on the tray 121. Specifically, the rotating shaft 13 is arranged at the center of the tray 121, so that the detecting device is recombined into a device with the center of gravity on the central axis, and then the device with the center of gravity on the central axis is placed at the center of the weighing tray for weighing, so as to obtain the actual weighing of the detecting device, and the actual weighing is used as the weighing reference of the weighing sensor; then the rotating shaft 13 is taken down from the center position of the tray 121 and is installed at the edge position of the tray 121, so that the detection device is recombined into an eccentric device with the gravity center not on the center shaft, the eccentric device is placed on a weighing disc of the weighing sensor, the rotating disc 12 is rotated and the weighing index of the weighing sensor is read, and whether the weighing sensor can accurately measure when the weighing disc has different stress points is detected, namely, whether the weighing sensor is qualified can be detected through one detection device, and the actual weighing of the detection device is not required to be obtained through an additional device, so that the detection convenience of the weighing sensor is improved, meanwhile, the stress point of the weighing disc is not required to be changed by manually moving the position of an object on the weighing disc, the labor consumption is saved, and the detection efficiency of the weighing sensor is improved; in addition, the tray with regular shape and uniform material can be matched with the rotating shaft to form the detection device with the gravity center not on the rotating shaft, and the detection device is simple in structure and low in cost.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.
The embodiment of the application discloses A1. a weighing sensor's detection device includes: the turntable comprises a base and a turntable which is rotatably fixed on the base around a rotating axis, wherein the center of gravity of the turntable is not on the rotating axis.
A2. The detecting device of the load cell recited in claim a1, further comprising a rotating shaft connecting the base and the turntable, the base and the turntable being rotatably connected via the rotating shaft.
A3. The detecting device of the weighing sensor as claimed in A2, wherein the turntable comprises a tray and a gravity block arranged on the tray, the rotating shaft is connected with the central position of the tray, and the gravity block is arranged at the edge position of the tray.
A4. The detecting device of the load cell as recited in a3, wherein the gravity block is detachably disposed on the tray.
A5. The detecting device of the load cell as recited in a2, wherein the rotating shaft is connected with the edge position of the tray.
A6. The detecting device of the weighing sensor as claimed in A5, wherein the tray is further provided with a gravity block, the gravity block is arranged on the tray, and the gravity block and the rotating shaft are respectively positioned at two sides of the gravity center of the tray.
A7. The detecting device of the load cell recited in a2, further comprising: and the power device is used for driving the tray to rotate relative to the base and is in transmission connection with the rotating shaft.
A8. The detection device of the weighing sensor A7, further comprising a bearing, wherein one end of the rotating shaft is connected with the base through the bearing, and the other end of the rotating shaft is fixedly connected with the tray.
The embodiment of the application discloses B1. a detection method of a weighing sensor, which comprises the following steps:
providing a detection device, wherein the detection device comprises a base and a turntable which is rotatably fixed on the base around a rotation axis, and the gravity center of the turntable is not on the rotation axis;
acquiring an actual weighing of the detection device;
placing the detection device on a weighing pan of the load cell;
reading the weighing readings of the weighing sensor in the rotating process of the turntable;
and if the difference value between the weighing index and the actual weighing meets a preset condition, judging that the weighing sensor is qualified.
B2. The method for detecting a load cell according to B1, wherein the obtaining of the actual weighing of the detecting device specifically includes:
and weighing the detection device by using a qualified weighing sensor, and reading the reading of the qualified weighing sensor to be used as actual weighing.
B3. The detection method of the load cell according to B1,
the provided detection device further comprises a rotating shaft connected with the base and the rotating disc, the base and the rotating disc are rotatably connected through the rotating shaft, the rotating disc comprises a tray and a gravity block arranged on the tray, the rotating shaft is connected with the center of the tray, the gravity block is arranged at the edge of the tray, and the gravity block is detachably arranged on the tray;
the actual weighing of the detection device is obtained by:
installing the gravity block at the central position of the tray to form a detection device with a first assembly structure, placing the detection device with the first assembly structure on the central position of a weighing disc of the weighing sensor, and reading the reading of the weighing sensor to be used as actual weighing;
the detection device is placed on a weighing tray of the weighing sensor, and the detection device specifically comprises the following components:
and mounting the gravity block at the edge position of the tray to form a detection device with a second assembly structure, and placing the detection device with the second assembly structure on a weighing tray of the weighing sensor.
B4. The detection method of the load cell according to B1,
the provided detection device further comprises a rotating shaft which is connected with the base and the turntable, the base and the turntable are rotatably connected through the rotating shaft, the turntable only comprises a tray, and the rotating shaft is detachably arranged on the tray;
the actual weighing of the detection device is obtained by:
installing the rotating shaft at the central position of the tray to form a detection device with a first assembly structure, placing the detection device with the first assembly structure at the central position of a weighing disc of the weighing sensor, and reading the reading of the weighing sensor to be used as actual weighing;
the detection device is placed on a weighing tray of the weighing sensor, and the detection device specifically comprises the following components:
and mounting the rotating shaft at the edge position of the tray to form a detection device with a second assembly structure, and placing the detection device with the second assembly structure on a weighing tray of the weighing sensor.
B5. The detection method of the load cell according to B1, wherein the placing the detection device on the weighing pan of the load cell specifically includes: placing the detection device on the weighing platter with the base in a central position of the weighing platter.
B6. The detection method of the load cell of B1, wherein rotating the turntable specifically includes:
the turntable is rotated at least 360 degrees.
B7. The method for detecting a load cell according to B1, wherein the reading of the weighing index of the load cell during rotation of the turntable specifically includes:
and in the continuous rotating process of the turntable, acquiring the weighing readings of the current weighing sensor in real time.
B8. The method for detecting a load cell according to B1, wherein the reading of the weighing index of the load cell during rotation of the turntable specifically includes:
and acquiring the weighing readings of the current weighing sensor once when the turntable rotates by a preset angle.
B9. The detection method of the weighing sensor according to B1, wherein the difference between the weighing index and the actual weighing meets a preset condition, and specifically comprises: and the difference value between the weighing index and the actual weighing is smaller than a preset threshold value.
Claims (15)
1. A detecting device of a weighing sensor, comprising: a base, and a turntable rotatably fixed to the base about an axis of rotation, the turntable having a center of gravity that is not on the axis of rotation;
the detection device of the weighing sensor is used for being placed on a weighing disc of the weighing sensor, and the stress point of the weighing sensor changes along with the rotation of the turntable;
wherein, the detection device of the weighing sensor further comprises: a rotating shaft connecting the base and the turntable, the base and the turntable being rotatably connected via the rotating shaft;
wherein, the detection device of the weighing sensor further comprises: and the power device is used for driving the turntable to rotate relative to the base and is in transmission connection with the rotating shaft.
2. The detecting device of the weighing sensor according to claim 1, wherein the turntable comprises a tray and a gravity block arranged on the tray, the rotating shaft is connected with the center of the tray, and the gravity block is arranged at the edge of the tray.
3. The detecting device for a load cell according to claim 2, wherein said weight block is detachably provided on said tray.
4. The detecting device of a weighing sensor as recited in claim 1, wherein the turntable comprises a tray, and the rotating shaft is connected with an edge position of the tray.
5. The detecting device of the weighing sensor as recited in claim 4, wherein the tray is further provided with a gravity block, the gravity block is arranged on the tray, and the gravity block and the rotating shaft are respectively located at two sides of the gravity center of the tray.
6. The detecting device of the weighing sensor according to claim 1, further comprising a bearing, wherein one end of the rotating shaft is connected with the base through the bearing, and the other end of the rotating shaft is fixedly connected with the turntable.
7. A detection method of a weighing sensor is characterized by comprising the following steps:
providing a detection device, wherein the detection device comprises a base and a turntable which is rotatably fixed on the base around a rotation axis, and the gravity center of the turntable is not on the rotation axis;
wherein the stress point of the weighing sensor changes along with the rotation of the turntable;
the detection device of the weighing sensor further comprises a rotating shaft which is connected with the base and the turntable, and the base and the turntable are rotatably connected through the rotating shaft;
wherein, the detection device of the weighing sensor further comprises: the power device is used for driving the turntable to rotate relative to the base and is in transmission connection with the rotating shaft;
acquiring an actual weighing of the detection device;
placing the detection device on a weighing pan of the load cell;
reading the weighing readings of the weighing sensor in the rotating process of the turntable;
and if the difference value between the weighing index and the actual weighing meets a preset condition, judging that the weighing sensor is qualified.
8. The method according to claim 7, wherein the obtaining of the actual weighing of the detection device is specifically:
and weighing the detection device by using a qualified weighing sensor, and reading the reading of the qualified weighing sensor to be used as actual weighing.
9. The detecting method of a load cell according to claim 7,
the provided detection device further comprises a rotating shaft connected with the base and the rotating disc, the base and the rotating disc are rotatably connected through the rotating shaft, the rotating disc comprises a tray and a gravity block arranged on the tray, the rotating shaft is connected with the center of the tray, and the gravity block is detachably arranged on the tray;
the actual weighing of the detection device is obtained by:
installing the gravity block at the central position of the tray to form a detection device with a first assembly structure, placing the detection device with the first assembly structure on the central position of a weighing disc of the weighing sensor, and reading the reading of the weighing sensor to be used as actual weighing;
the detection device is placed on a weighing tray of the weighing sensor, and the detection device specifically comprises the following components:
and mounting the gravity block at the edge position of the tray to form a detection device with a second assembly structure, and placing the detection device with the second assembly structure on a weighing tray of the weighing sensor.
10. The detecting method of a load cell according to claim 7,
the provided detection device further comprises a rotating shaft which is connected with the base and the turntable, the base and the turntable are rotatably connected through the rotating shaft, the turntable only comprises a tray, and the rotating shaft is detachably arranged on the tray;
the actual weighing of the detection device is obtained by:
installing the rotating shaft at the central position of the tray to form a detection device with a first assembly structure, placing the detection device with the first assembly structure at the central position of a weighing disc of the weighing sensor, and reading the reading of the weighing sensor to be used as actual weighing;
the detection device is placed on a weighing tray of the weighing sensor, and the detection device specifically comprises the following components:
and mounting the rotating shaft at the edge position of the tray to form a detection device with a second assembly structure, and placing the detection device with the second assembly structure on a weighing tray of the weighing sensor.
11. The method for detecting a load cell according to claim 7, wherein said placing of the detecting device on a weighing pan of the load cell is in particular: placing the detection device on the weighing platter with the base in a central position of the weighing platter.
12. The method for detecting a load cell according to claim 7, wherein said rotating said turntable specifically comprises:
the turntable is rotated at least 360 degrees.
13. The method for detecting the load cell according to claim 7, wherein the reading of the weighing indication of the load cell during the rotation of the turntable specifically comprises:
and in the continuous rotating process of the turntable, acquiring the weighing readings of the current weighing sensor in real time.
14. The method for detecting the load cell according to claim 7, wherein the reading of the weighing indication of the load cell during the rotation of the turntable specifically comprises:
and acquiring the weighing readings of the current weighing sensor once when the turntable rotates by a preset angle.
15. The method for detecting the weighing sensor according to claim 7, wherein a difference between the weighing index and the actual weighing meets a preset condition, specifically: and the difference value between the weighing index and the actual weighing is smaller than a preset threshold value.
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| CN201811564090.1A CN109632068B (en) | 2018-12-20 | 2018-12-20 | Detection device and method for weighing sensor |
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