Self-calibrating sensor and weighing device including the same

Abstract

The present invention provides a self-calibrating sensor and a weighing device including the same. The self-calibrating sensor includes a self-calibrating motor, a self-calibrating weight, and a self-calibrating weight support. The self-calibrating motor is mounted on a sensor base plate. One end of the self-calibrating weight support is fixed to the sensor base plate, and the other end is fixed to a sensor bearing portion. A force transmission portion for amplifying force is provided inside the self-calibrating weight support. The self-calibrating weight is mounted on the self-calibrating motor and spans above the self-calibrating weight support. The self-calibrating motor drives the self-calibrating weight to move downward and load onto the self-calibrating weight support, or move upward away from the self-calibrating weight support. The present invention adds a force amplification mechanism to the internal calibration mechanism. Through the implementation of the self-calibrating sensor, a smaller self-calibrating weight can be obtained, and the power, size, etc. of the corresponding self-calibrating motor can all be made very small, making the sensor structure simple and compact, and effectively reducing the size of the overall sensor.

Description

Technical Field

[0001] The present invention relates to the field of sensors, and particularly to a self-calibrating sensor and a weighing device including the same. Background Art

[0002] With the changes of the environment and time, the weighing sensors on electronic balances need to be recalibrated to ensure the accuracy of weighing. Most electronic balances are equipped with a precision weight for calibration before weighing. If no precision weight is equipped, the balance cannot be calibrated, resulting in the inoperability of the electronic balance. Since the precision weight needs to be stored separately, this brings great inconvenience to the use.

[0003] In response to the above problems, the current solution is to add an internal calibration mechanism inside the electronic balance for automatic calibration, so that there is no need to additionally equip an external measuring weight for calibration, which greatly facilitates the end-user customers. For example, the internal calibration mechanism is installed inside the electronic balance. This structure will occupy the internal space volume of the electronic balance. To ensure the accuracy of calibration, the larger the weighing range of the weighing sensor, the greater the mass of the internal calibration weight required accordingly.

[0004] A self-calibrating sensor refers to a sensor that can achieve automatic calibration of the sensor through program control of the self-calibration mechanism without manual intervention. The core components of the self-calibrating sensor are composed of an internal calibration motor, an internal calibration weight, and an internal calibration weight bracket. The larger the weighing range of the sensor, the greater the mass of the self-calibration weight required accordingly.

[0005] In the design of some large weighing sensors, due to size and space limitations, the size of the internal calibration weight is required not to be too large. In this case, the weight and size of the internal calibration weight are restricted, and thus the corresponding mass during internal calibration cannot meet the weighing performance requirements of the weighing sensor for internal calibration.

[0006] In view of this, the inventors of the present application have designed a self-calibrating sensor and a weighing device including the same in order to overcome the above technical problems. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to overcome the defect that the corresponding mass during internal calibration of the internal calibration sensor in the prior art cannot meet the weighing performance requirements of the weighing sensor for internal calibration, and to provide a self-calibrating sensor and a weighing device including the same.

[0008] The present invention solves the above technical problems through the following technical solutions:

[0009] A self-calibrating sensor, characterized in that the self-calibrating sensor includes a self-calibrating motor, a self-calibrating weight, and a self-calibrating weight support. The self-calibrating motor is installed on the sensor base plate. One end of the self-calibrating weight support is fixed to the sensor base plate, and the other end is fixed to the sensor bearing part. And a force transmission part for magnifying force is arranged in the self-calibrating weight support;

[0010] The self-calibrating weight is installed on the self-calibrating motor and straddles above the self-calibrating weight support. The self-calibrating motor drives the self-calibrating weight to move downward and load onto the self-calibrating weight support, or move upward away from the self-calibrating weight support.

[0011] According to an embodiment of the present invention, the self-calibrating weight support includes a fixing part, a parallel guiding part, a force transmission part, and a connecting part. The fixing part is fixedly connected to the sensor base plate. One end of the parallel guiding part is connected to the fixing part, and the other end is hingedly connected to one end of the force transmission part. The parallel guiding part is located between the self-calibrating weight and the self-calibrating motor;

[0012] The other end of the force transmission part is connected to the connecting part, and the connecting part is fixed to the sensor bearing part.

[0013] According to an embodiment of the present invention, the force transmission part includes a first-stage lever and a second-stage lever connected in sequence. The first-stage lever is connected to the parallel guiding part, and the second-stage lever is connected to the connecting part.

[0014] According to an embodiment of the present invention, the first-stage lever includes a first-stage connecting part composed of a plurality of connecting rods. The connecting rods are sequentially connected by hinges. One end of the first-stage lever is fixedly connected to the fixing part;

[0015] The second-stage lever includes a second-stage connecting part composed of a plurality of connecting rods. The connecting rods are sequentially connected by hinges. The other end of the first-stage lever is hingedly connected to the second-stage lever. And one end of the second-stage lever is connected to the fixing part, and the other end is connected to the connecting part.

[0016] According to an embodiment of the present invention, the first-stage connecting part includes a first connecting rod, a second connecting rod, and a third connecting rod. One end of the first connecting rod is connected to the fixing part by a hinge. The other end of the first connecting rod is connected to one end of the second connecting rod by a hinge. The other end of the second connecting rod is sequentially connected to one end of the third connecting rod. The other end of the third connecting rod is connected to the second-stage connecting part.

[0017] According to an embodiment of the present invention, the second-stage connecting member includes a fourth connecting rod, a fifth connecting rod, and a sixth connecting rod. One end of the fourth connecting rod is connected to the fixing portion through a hinge, the other end of the fourth connecting rod is connected to one end of the fifth connecting rod through a hinge, the other end of the fifth connecting rod is connected to one end of the sixth connecting rod through a hinge, the other end of the sixth connecting rod is connected to the connecting portion, and the fifth connecting rod is connected to the third connecting rod through a hinge.

[0018] According to an embodiment of the present invention, a first included angle is formed between the first-stage connecting members located at both ends in the first-stage connecting members.

[0019] According to an embodiment of the present invention, a second included angle is formed between the second-stage connecting members located at both ends in the second-stage connecting members.

[0020] According to an embodiment of the present invention, the force amplification multiple of the force transmission portion is the weight of the self-calibration weight divided by the sine values of the first included angle and the second included angle.

[0021] The present invention also provides a weighing device, characterized in that the weighing device includes the self-calibration sensor as described above.

[0022] The positive and progressive effects of the present invention are as follows:

[0023] In the self-calibration sensor of the present invention and the weighing device including the same, a force amplification mechanism is added to the in-calibration mechanism, so that a large-range sensor can be calibrated with a very small weight, and the above problems are well solved.

[0024] By implementing the self-calibration sensor, a smaller self-calibration weight can be obtained, and the power, size, etc. of the corresponding self-calibration motor can be made very small, making the sensor structure simple and compact, and effectively reducing the size of the overall sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and other features, properties, and advantages of the present invention will become more apparent from the following description in conjunction with the drawings and embodiments, in which the same reference numerals in the drawings always represent the same features, wherein:

[0026] Figure 1 is a schematic structural diagram of the self-calibration sensor of the present invention.

[0027] Figure 2 is a side view of the self-calibration sensor of the present invention.

[0028] Figure 3 is a schematic structural diagram of the self-calibration weight bracket in the self-calibration sensor of the present invention.

[0029] Figure 4This is an installation schematic diagram of the force transmission part of the self - calibration weight support in the self - calibration sensor of the present invention.

[0030] Figure 5 This is a structural schematic diagram of the force transmission part of the self - calibration weight support in the self - calibration sensor of the present invention.

[0031]

Reference Signs

[0032] Self - calibration motor 10

[0033] Self - calibration weight 20

[0034] Self - calibration weight support 30

[0035] Sensor bottom plate 40

[0036] Sensor bearing part 50

[0037] Hinge 60

[0038] Force transmission part 31

[0039] Fixing part 32

[0040] Parallel guiding part 33

[0041] Connecting part 34

[0042] First connecting rod 311

[0043] Second connecting rod 312

[0044] Third connecting rod 313

[0045] Fourth connecting rod 314

[0046] Fifth connecting rod 315

[0047] Sixth connecting rod 316

[0048] First included angle θ1

[0049] Second included angle θ2 Detailed Embodiments

[0050] To make the above - mentioned objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific embodiments of the present invention will be given in conjunction with the accompanying drawings.

[0051] Now the embodiments of the present invention will be described in detail with reference to the accompanying drawings. Now the preferred embodiments of the present invention will be described in detail, and the examples are shown in the accompanying drawings. Whenever possible, the same reference signs will be used throughout all the drawings to represent the same or similar parts.

[0052] In addition, although the terms used in the present invention are selected from well-known and commonly used terms, some of the terms mentioned in the specification of the present invention may be selected by the applicant according to his or her judgment, and their detailed meanings are described in the relevant parts of the description herein.

[0053] In addition, it is required to understand the present invention not only by the actual terms used, but also by the meaning implied by each term.

[0054] Figure 1 It is a schematic structural view of the self-calibrating sensor of the present invention. Figure 2 It is a side view of the self-calibrating sensor of the present invention. Figure 3 It is a schematic structural view of the self-calibration weight support in the self-calibrating sensor of the present invention. Figure 4 It is an installation schematic view of the force transmission part of the self-calibration weight support in the self-calibrating sensor of the present invention. Figure 5 It is a schematic structural view of the force transmission part of the self-calibration weight support in the self-calibrating sensor of the present invention.

[0055] As Figures 1 to 5 shown, the present invention discloses a self-calibrating sensor, which includes a self-calibration motor 10, a self-calibration weight 20 and a self-calibration weight support 30. The self-calibration motor 10 is installed on the sensor bottom plate 40. One end of the self-calibration weight support 30 is fixed to the sensor bottom plate 40, and the other end is fixed to the sensor bearing part 50. And a force transmission part 31 for amplifying force is arranged in the self-calibration weight support 30. The self-calibration weight 20 is installed on the self-calibration motor 10 and straddles above the self-calibration weight support 30. The self-calibration motor 10 drives the self-calibration weight 20 to move downward and load onto the self-calibration weight support 30, or move upward away from the self-calibration weight support 30.

[0056] Preferably, the self-calibration weight support 30 includes a fixing part 32, a parallel guiding part 33 (which is also the bearing part when loading the weight) and a connecting part 34. The fixing part 32 is fixedly connected to the sensor bottom plate 40. One end of the parallel guiding part 33 is connected to the fixing part 32, and the other end is hingedly connected to one end of the force transmission part 31. The parallel guiding part 33 is located between the self-calibration weight 20 and the self-calibration motor 10. The other end of the force transmission part 31 is connected to the connecting part 34, and the connecting part 34 is fixed to the sensor bearing part 50.

[0057] When it is necessary to load the self - calibration weight 20, the self - calibration motor 10 drives the self - calibration weight 20 to be placed on the parallel guiding part 32 of the self - calibration weight support 30 to perform the self - calibration loading action. After the self - calibration of the sensor is completed, the self - calibration motor 10 pushes the self - calibration weight 20 away from the self - calibration weight support 30, thus completing the entire self - calibration process of the sensor. The self - calibration motor 10 is mainly used to push the self - calibration weight 20 up and down. The self - calibration weight 20 is the core component of the self - calibration mechanism and is used to re - assign the weight of the self - calibration sensor. The self - calibration weight support 30 is mainly used to support the self - calibration weight 20 during the self - calibration process, and transmits the weight of the self - calibration weight 20 to the sensor bearing part through the self - calibration weight support frame 30 to assign weight to the sensor.

[0058] Particularly preferably, the force - transmitting part 31 includes a first - stage lever and a second - stage lever connected in sequence. The first - stage lever is connected to the parallel guiding part 33, and the second - stage lever is connected to the connecting part 34. The first - stage lever includes a first - stage connecting member composed of a plurality of connecting rods. The connecting rods are sequentially connected by hinges. One end of the first - stage lever is fixedly connected to the fixing part 32. The second - stage lever includes a second - stage connecting member composed of a plurality of connecting rods. The second - stage connecting members are sequentially connected by hinges. The other end of the first - stage lever is connected to the second - stage lever by a hinge, and one end of the second - stage lever is connected to the fixing part 32, and the other end is connected to the connecting part 34.

[0059] Preferably in this embodiment, the first - stage connecting member includes a first connecting rod 311, a second connecting rod 312, and a third connecting rod 313. One end of the first connecting rod 311 is connected to the fixing part 32 by a hinge 60, and the other end of the first connecting rod 311 is connected to one end of the second connecting rod 312 by a hinge 60. The other end of the second connecting rod 312 is sequentially connected to one end of the third connecting rod 313, and the other end of the third connecting rod 313 is connected to the second - stage connecting member, thereby forming the first - stage lever.

[0060] The second - stage connecting member includes a fourth connecting rod 314, a fifth connecting rod 315, and a sixth connecting rod 316. One end of the fourth connecting rod 314 is connected to the fixing part 32 by a hinge 60, and the other end of the fourth connecting rod 314 is connected to one end of the fifth connecting rod 315 by a hinge 60. The other end of the fifth connecting rod 315 is connected to one end of the sixth connecting rod 316 by a hinge 60, and the other end of the sixth connecting rod 316 is connected to the connecting part 34, thereby forming the second - stage lever. The fifth connecting rod 315 is connected to the third connecting rod 313 by a hinge 60, so that the second - stage lever is connected to the first - stage lever.

[0061] It should be noted that the number of connecting rods included in the first-stage connecting member described herein and the number of connecting rods included in the second-stage connecting member are only examples and do not limit the number of connecting rods, which can be adjusted according to the actual lever ratio requirements and are all within the protection scope of this application.

[0062] In addition, there is a first included angle θ1 between the first-stage connecting members at both ends in the first-stage connecting member. For example, in this embodiment, the included angle θ1 between the first connecting rod 311 and the third connecting rod 313, and the size of this angle can be adjusted according to the required lever ratio.

[0063] Similarly, there is a second included angle θ2 between the second-stage connecting members at both ends in the second-stage connecting member. For example, in this embodiment, the included angle θ2 between the fourth connecting rod 314 and the sixth connecting rod 316, and the size of this angle can be adjusted according to the required lever ratio.

[0064] The force amplification multiple of the force transmission part 31 is the weight of the self-calibration weight 20 divided by the sine value of the first included angle θ1 and the sine value of the second included angle θ2.

[0065] The present invention also provides a weighing device, characterized in that the weighing device includes the self-calibration sensor as described above.

[0066] According to the above structural description, the working principle of the self-calibration sensor of the present invention is that when the sensor starts the self-calibration operation, the self-calibration motor 10 moves downward to place the self-calibration weight 20 on the self-calibration weight support 30, and the weight falls on the bearing part of the self-calibration weight support 30. The parallel guiding part 33 ensures the vertical movement of the second connecting rod 312. At the same time, it pulls the third connecting rod 313 to move, transmits the force to the fifth connecting rod 315, and then pulls the sixth connecting rod 316 to move downward through the hinge 60. Since the sixth connecting rod 316 is connected to the sensor bearing part 50 through the hinge 60, the force transmission from the weight to the sensor is completed.

[0067] In this embodiment, the amplification multiple of the self-calibration sensor is the weight G of the weight divided by the sine value of the included angle between the third connecting rod 313 and the first connecting rod 311, and then divided by the sine value of the included angle between the fourth connecting rod 314 and the sixth connecting rod 316. As Figure 5As shown, the magnification factor N = 1 / (tgθ1×tgθ2), and the specific angles are shown in the figure. Through the magnification of the self-calibration weight support 30, an amplified weight is obtained on the sixth connecting rod 316 of the self-calibration weight support 30 (which is N times the original self-calibration weight, and N is the magnification ratio of the self-calibration weight support). One end of the sixth connecting rod 316 is connected to the force-receiving end of the sensor, so as to transmit the force on the sixth connecting rod 316 to the sensor, enabling the sensor to sense a force N times greater than the original self-calibration weight (meeting the weight requirement for the self-calibration of the sensor), and completing the assignment to the sensor. After the assignment is completed, the self-calibration motor 10 moves upward, pushing the self-calibration weight 20 upward to disengage from the self-calibration weight support 30, thus completing the entire assignment operation process.

[0068] The self-calibration sensor of the present invention and the weighing device including the same have the following advantages:

[0069] 1. A relatively large self-calibration weight within a limited size range;

[0070] 2. By adopting the structure of the present invention, it is very convenient to solve the design of a self-calibration sensor with a large measurement range and a small size requirement;

[0071] 3. Simple and compact, effectively reducing the overall size of the sensor.

[0072] In summary, the self-calibration sensor of the present invention and the weighing device including the same add a force amplification mechanism to the in-calibration mechanism, and can calibrate a large-range sensor with a very small weight, thus well solving the above problems.

[0073] Through the implementation of the self-calibration sensor, a smaller self-calibration weight can be obtained, and the power, size, etc. of the corresponding self-calibration motor can all be made very small, making the sensor structure simple and compact, and effectively reducing the overall size of the sensor.

[0074] Although the specific implementation manners of the present invention have been described above, those skilled in the art should understand that these are only examples, and the protection scope of the present invention is defined by the appended claims. Without departing from the principles and essence of the present invention, those skilled in the art can make various changes or modifications to these implementation manners, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A self-calibrating sensor, characterized in that, the self-calibrating sensor includes a self-calibrating motor, a self-calibrating weight and a self-calibrating weight support. The self-calibrating motor is installed on the sensor base plate. One end of the self-calibrating weight support is fixed to the sensor base plate, and the other end is fixed to the sensor bearing part. And a force transmission part for amplifying force is arranged in the self-calibrating weight support; the self-calibrating weight support includes a fixing part, a parallel guiding part and a connecting part; the force transmission part includes a first-stage lever and a second-stage lever connected in sequence. The first-stage lever is connected to the parallel guiding part, and the second-stage lever is connected to the connecting part; the first-stage lever includes a first-stage connecting piece composed of a plurality of connecting rods. The connecting rods are sequentially connected by hinges. One end of the first-stage lever is fixedly connected to the fixing part; the second-stage lever includes a second-stage connecting piece composed of a plurality of connecting rods. The connecting rods are sequentially connected by hinges. The other end of the first-stage lever is connected to the second-stage lever by a hinge. And one end of the second-stage lever is connected to the fixing part, and the other end is connected to the connecting part; the self-calibrating weight is installed on the self-calibrating motor and spans above the self-calibrating weight support. The self-calibrating motor drives the self-calibrating weight to move downward and load onto the self-calibrating weight support, or move upward away from the self-calibrating weight support.

2. The self-calibrating sensor according to claim 1, characterized in that, the fixing part is fixedly connected to the sensor base plate. One end of the parallel guiding part is connected to the fixing part, and the other end is hingedly connected to one end of the force transmission part. The parallel guiding part is located between the self-calibrating weight and the self-calibrating motor; the other end of the force transmission part is connected to the connecting part, and the connecting part is fixed to the sensor bearing part.

3. The self-calibrating sensor according to claim 1, characterized in that, the first-stage connecting piece includes a first connecting rod, a second connecting rod and a third connecting rod. One end of the first connecting rod is connected to the fixing part by a hinge. The other end of the first connecting rod is connected to one end of the second connecting rod by a hinge. The other end of the second connecting rod is sequentially connected to one end of the third connecting rod. The other end of the third connecting rod is connected to the second-stage connecting piece.

4. The self-calibrating sensor according to claim 3, characterized in that, the second-stage connecting piece includes a fourth connecting rod, a fifth connecting rod and a sixth connecting rod. One end of the fourth connecting rod is connected to the fixing part by a hinge. The other end of the fourth connecting rod is connected to one end of the fifth connecting rod by a hinge. The other end of the fifth connecting rod is connected to one end of the sixth connecting rod by a hinge. The other end of the sixth connecting rod is connected to the connecting part, and the fifth connecting rod is connected to the third connecting rod by a hinge.

5. The self-calibrating sensor according to claim 1 or 4, characterized in that, a first included angle is formed between the first-stage connecting pieces located at both ends in the first-stage connecting piece.

6. The self-calibrating sensor according to claim 5, characterized in that, A second included angle is formed between the second-level connectors located at both ends of the second-level connectors.

7. The self-calibrating sensor according to claim 6, wherein, the force amplification factor of the force transmission part is the weight of the self-calibrating weight divided by the sine values of the first included angle and the second included angle.

8. A weighing device, wherein, the weighing device includes the self-calibrating sensor according to any one of claims 1-7.

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