Force applying mechanism of a force measuring device
By using a combination of two-stage force urging sources and sensor modules in the force measurement device, multiple force measurement paths are formed, and high-precision small force value sensor module clusters can be used to achieve large force value measurement, which solves the problem of super-large force measuring machines in the existing technology The problem of limitations in force range and insufficient accuracy improves the force range and accuracy of the force measuring device.
Patent Information
- Application Number
- CN202011323597.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-11-23
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2040-11-23
AI Technical Summary
In the ultra-large force measuring machine, the existing force measuring devices are insufficient when using a high-strength standard sensor to verify small force value products alone, resulting in limited force measuring range.
The combination of two-stage force urging sources and sensor modules is adopted to form multiple force measurement paths through parallel and series settings, and high-precision small force value sensor module clusters are used to achieve high force value measurement, improving the force measurement range and accuracy.
It greatly expands the force measurement range and accuracy of the force measurement device, reduces the purchase cost, improves structural stability, and solves the problem of insufficient measurement accuracy of a single large-tonnage standard sensor.
Smart Images
Figure CN113176014B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of force value measurement, in particular to a force applying mechanism of a force measuring device. Background Art
[0002] According to the basic principle, standard force measuring machines are mainly divided into lever machines, static weight machines and superimposed force standard machines. Since lever machines and static weight machines both use weights as the force source, for super-large force measuring machines of 1,000 tons or even 10,000 tons, if the weight is used as the standard load, the weight must be very large and loading is very difficult. Therefore, superimposed force standard machines are usually used for super-large force measuring machines. The superimposed force standard machine uses a hydraulic or mechanical force generator as the force source, and the force value is measured by a standard sensor. The standard sensor needs to be calibrated on a higher-level force measuring machine to obtain its mechanical properties before it can be used to determine the force value. Existing force measuring devices generally have only one force-level standard sensor. If a large-force-level standard sensor is used to calibrate the performance of a small-force product to be tested, the calibration accuracy is insufficient, resulting in the limitation of the force measuring range of the force measuring device. Summary of the invention
[0003] In order to overcome the above-mentioned deficiencies of the prior art, an object of the present invention is to provide a force applying mechanism of a force measuring device.
[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention to solve its technical problem is: a force-applying mechanism of a force measuring device, comprising a first force level force source, a second force level force source, a first force level sensor module and a second force level sensor module, the maximum force value of the first force level force source is greater than the maximum force value of the second force level force source, the maximum force value measured by the first force level sensor module is greater than the maximum force value measured by the second force level sensor module, the first force level force source and the second force level force source are arranged in parallel, the first force level force source and the first force level sensor module are connected in series to form a first force measuring path, and the second force level force source, the second force level sensor module and the first force level sensor module are connected in series to form a second force measuring path.
[0005] By adopting the technical solution of the present invention, two or more force measuring paths are adopted, and the force measuring ranges of the two force measuring paths are at different orders of magnitude, which greatly improves the force measuring range and measurement accuracy of the force measuring device and reduces the purchase cost; the first force level sensor module implements the measurement alone or in series with the second force level sensor module. The first force level sensor module serves as a common structural basis, which simplifies the device layout structure and improves the structural stability of the force measuring device.
[0006] Furthermore, when measuring force, according to the force value range of the product to be measured, one of the first force measuring path and the second force measuring path is selected to perform force measurement alone.
[0007] Furthermore, the first force measuring path and the second force measuring path act together.
[0008] By adopting the above-mentioned preferred scheme, force can be gradually applied through the second force level force source, during which the second force level sensor module measures a small force value; then force is gradually applied through the first force level force source, and the second force level force source is gradually released. The two force level force sources cooperate to achieve a gradual increase in the total force, thereby implementing the calibration of large force values.
[0009] Furthermore, the first force level source and the second force level source are any one of an air cylinder, an oil cylinder, a water cylinder and a mechanical linear lifting mechanism, or a combination of multiple thereof.
[0010] By adopting the above preferred solution, a reasonable force source is selected according to the actual application occasion of the force measuring device.
[0011] Furthermore, the first force level force source and the second force level force source are both located below the first force level sensor module, and the force component of the first force level force source is in contact with or separated from the chassis of the first force level sensor module; the force component of the second force level force source is connected to the second force level sensor module, and the top surface of the second force level sensor module is in contact with or separated from the chassis of the first force level sensor module.
[0012] Furthermore, the maximum force measurement value of the first force level sensor module is 9 times the maximum force measurement value of the second force level sensor module.
[0013] By adopting the above preferred solution, the force measuring range of the force measuring device is greatly improved.
[0014] Furthermore, the first force level sensor module includes a first layer of voltage divider units, a second layer of voltage divider units, 9 standard sensors and a chassis which are sequentially arranged from top to bottom, and the 9 standard sensors are arranged in parallel on the chassis;
[0015] The first-layer voltage divider unit includes a first voltage divider, the first voltage divider includes a first disk body and three first pressure heads, and the first pressure heads are located below the first disk body;
[0016] The second-layer voltage divider unit includes three second voltage dividers, and the three second voltage dividers are respectively located directly below the three first pressure heads. Each of the second voltage dividers includes a second disk body and three second pressure heads. The second pressure heads are located below the second disk body, and the second disk body contacts the bottom surface of the first pressure head directly above it. A standard sensor is correspondingly arranged below each second pressure head.
[0017] By adopting the above-mentioned preferred scheme, 9 standard sensors are subjected to balanced force in parallel, and the force measurement range is increased to 9 times that of a single standard sensor. The accuracy of large-force standard sensors can be achieved by utilizing a cluster layout of high-precision small-force standard sensors, effectively solving the problem of insufficient measurement accuracy of a single large-tonnage standard sensor.
[0018] Furthermore, the second force level sensor module includes a pressure head and a standard sensor, the pressure head contacts the top surface of the standard sensor, and the force applying component of the second force level force source contacts the bottom surface of the standard sensor.
[0019] By adopting the above preferred solution, the force can be effectively and stably transmitted through the pressure head, thereby improving the detection accuracy of the standard sensor.
[0020] Furthermore, the first force level force source is arranged in an annular structure, and the second force level force source and the second force level sensor module are located in the annular inner ring space of the first force level force source.
[0021] By adopting the above preferred solution, the layout is reasonable and the structural stability is improved.
[0022] Furthermore, an outer retaining ring and an inner retaining ring are installed on the lower surface of the chassis of the first force level sensor module, the inner diameter of the outer retaining ring is slightly larger than the top outer diameter of the force applying component of the first force level force source, and the inner diameter of the inner retaining ring is slightly larger than the top outer diameter of the lower pressure head of the second force level sensor module.
[0023] By adopting the above preferred solution, the positions of the force applying component of the first force level force applying source and the pressure head can be regulated to prevent deviation. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0025] Figure 1 It is a structural schematic diagram of an implementation mode of the present invention;
[0026] Figure 2 is with Figure 1 The corresponding cross-sectional view;
[0027] Figure 3 It is a partial structural schematic diagram of the lower half of the force-applying mechanism;
[0028] Figure 4 It is a structural schematic diagram of the first force level sensor module;
[0029] Figure 5 is with Figure 4 The corresponding cross-sectional view;
[0030] Figure 6 It is a structural schematic diagram of the force measuring device.
[0031] The numbers and letters in the figure represent the names of the corresponding parts:
[0032] 10-first force level sensor module; 11-chassis; 111-outer retaining ring; 112-inner retaining ring; 121-first layer pressure dividing unit; 1210-first voltage divider; 1211-first disk body; 1212-first pressure head; 122-second layer pressure dividing unit; 1220-second voltage divider; 1221-second disk body; 1222-second pressure head; 13-standard sensor; 21-second force level sensor module; 211-lower pressure head; 212-standard sensor; 22-second force level force source; 23-first force level force source; 30-reaction frame; 301-upper pressure block; 302-moving seat; 40-frame; 401-upper seat body; 402-base. DETAILED DESCRIPTION
[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0034] like Figure 1 , 2 As shown, an embodiment of the present invention is: a force-applying mechanism of a force measuring device, comprising a first force level force source 23, a second force level force source 22, a first force level sensor module 10 and a second force level sensor module 21, the maximum force value of the first force level force source 23 is greater than the maximum force value of the second force level force source 22, the maximum force value measured by the first force level sensor module 10 is greater than the maximum force value measured by the second force level sensor module 21, the first force level force source 23 and the second force level force source 22 are arranged in parallel, the first force level force source 23 and the first force level sensor module 10 are connected in series to form a first force measuring path; the second force level force source 22, the second force level sensor module 21 and the first force level sensor module 10 are connected in series to form a second force measuring path.
[0035] The beneficial effects of adopting the above technical solution are: using two or more force measuring paths, the force measuring ranges of the two force measuring paths are at different orders of magnitude, which greatly improves the force measuring range and measurement accuracy of the force measuring device and reduces the purchase cost; the first force level sensor module implements the measurement alone or in series with the second force level sensor module, and the first force level sensor module serves as a common structural basis, which simplifies the device layout structure and improves the structural stability of the force measuring device.
[0036] In other embodiments of the present invention, when measuring force, according to the force value range of the product to be measured, one of the first force measurement path and the second force measurement path is selected to measure force alone. For example, the maximum force measurement range of the first force level sensor module is 10,000 tons of force, and the maximum force measurement range of the second force level sensor module is 1,000 tons of force. If the product to be measured is a 1,000-ton force sensor, the second force measurement path is used for measurement. In the second force measurement path, the detection accuracy of the second force level sensor module is higher, and its data is used as the measurement data; if the product to be measured is a 10,000-ton force sensor, the first force measurement path is used for measurement.
[0037] In some other embodiments of the present invention, in some large force value product testing scenarios, in order to make the small force value measurement interval more accurate, the first force measurement path and the second force measurement path work together during the measurement. Force can be gradually applied through the second force level force source, during which the second force level sensor module measures the small force value; then force is gradually applied through the first force level force source, and the second force level force source is gradually released. The two force level force sources cooperate to achieve a gradual increase in the total force, thereby implementing the calibration of large force values.
[0038] In other embodiments of the present invention, the specific forms of the first force level source and the second force level source are not limited and can be selected according to the actual application scenarios of the force measuring device, such as a pneumatic cylinder, an oil cylinder, a water cylinder or a mechanical linear lifting mechanism, or a combination of the above methods.
[0039] like Figure 3 As shown, in some other embodiments of the present invention, the first force level force source 23 and the second force level force source 21 are both located below the first force level sensor module, and the force component of the first force level force source 23 is in contact with or separated from the chassis 11 of the first force level sensor module; the force component of the second force level force source 22 is connected to the second force level sensor module 21, and the top surface of the second force level sensor module 21 is in contact with or separated from the chassis 11 of the first force level sensor module.
[0040] At present, there is no 10,000-ton force measuring machine or force standard machine in the world. The main reason is that there is no 10,000-ton force sensor on the market that meets the measurement accuracy requirements. The maximum force value that meets the measurement accuracy requirements can only reach 1,000 tons. Figure 4 , 5As shown, in other embodiments of the present invention, in order to solve the problem that the super-large tonnage dynamometer does not have an independent standard sensor that meets the measurement accuracy requirements, the first force level sensor module 10 includes a first layer of pressure dividing unit 121, a second layer of pressure dividing unit 122, 9 standard sensors 13 and a chassis 11 arranged in sequence from top to bottom, and the 9 standard sensors 13 are arranged in parallel on the chassis 11; the first layer of pressure dividing unit 121 includes a first pressure divider 1210, and the first pressure divider 1210 includes a first disk body 1211 and three first pressure heads 1212, The first pressure head 1212 is located below the first disk 1211; the second layer of pressure dividing unit 122 includes three second pressure dividers 1220, and the three second pressure dividers 1220 are respectively located directly below the three first pressure heads 1212. Each second pressure divider 1220 includes a second disk 1221 and three second pressure heads 1222. The second pressure head 1222 is located below the second disk 1221, and the second disk 1221 contacts the bottom surface of the first pressure head 1212 directly above it. A standard sensor 212 is correspondingly arranged below each second pressure head 1222. The beneficial effect of adopting the above technical solution is: the 9 standard sensors are parallelly loaded with balanced force, the force measurement range is increased to 9 times that of a single standard sensor, and the accuracy of large force standard sensors is achieved by using a cluster layout of high-precision small force standard sensors.
[0041] like Figure 3 As shown, in some other embodiments of the present invention, the second force level sensor module 21 includes a pressing head 211 and a standard sensor 212, the pressing head 211 contacts the top surface of the standard sensor 212, and the force applying component of the second force level force source 22 contacts the bottom surface of the standard sensor 212. The beneficial effect of adopting the above technical solution is that the force can be effectively and stably transmitted through the pressing head, thereby improving the detection accuracy of the standard sensor.
[0042] like Figure 1-3 As shown, in some other embodiments of the present invention, the first force level force source 23 is arranged in an annular structure, and the second force level force source 22 and the second force level sensor module 21 are located in the annular inner ring space of the first force level force source 23, with a reasonable layout to improve the structural stability. An outer retaining ring 111 and an inner retaining ring 112 are installed on the lower surface of the chassis 11 of the first force level sensor module 10, and the inner diameter of the outer retaining ring 111 is slightly larger than the top outer diameter of the force component of the first force level force source 23, and the inner diameter of the inner retaining ring 112 is slightly larger than the top outer diameter of the lower pressure head 211 of the second force level sensor module, which can regulate the position of the force component of the first force level force source and the lower pressure head to prevent displacement.
[0043] Figure 6A structural diagram of a force measuring device is shown in the figure, which includes a frame 40, a force applying mechanism and a reaction frame 30. The frame 40 includes an upper seat body 401, a base 402 and a column therebetween. The reaction frame 30 includes an upper pressure block 301, a movable seat 302 and a connecting screw therebetween. The force applying mechanism is installed on the upper seat body 401 of the frame. The upper pressure block 301 of the reaction frame is pressed above the first force level sensor module of the force applying mechanism. The compressed product to be tested is placed between the movable seat 302 and the upper seat body 401. The tensile product to be tested is connected between the movable seat 302 and the base 402. The force source of the force applying mechanism applies a driving force upward, and the force value of the product to be tested is determined by the first force level sensor module and / or the second force level sensor module.
[0044] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable ordinary technicians in the field to understand the content of the present invention and implement it. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.
Claims
1. A force applying mechanism of a force measuring device, characterized in that: It includes a first force level force source, a second force level force source, a first force level sensor module and a second force level sensor module, the maximum force value of the first force level force source is greater than the maximum force value of the second force level force source, the maximum force value measured by the first force level sensor module is greater than the maximum force value measured by the second force level sensor module, the first force level force source and the second force level force source are arranged in parallel, the first force level force source and the first force level sensor module are connected in series to form a first force measurement path, and the second force level force source, the second force level sensor module and the first force level sensor module are connected in series to form a second force measurement path; The first force level source and the second force level source are both located below the first force level sensor module, and the force applying component of the first force level source is in contact with or separated from the chassis of the first force level sensor module; The force applying component of the second force level force source is connected to the second force level sensor module, and the top surface of the second force level sensor module is in contact with or separated from the bottom plate of the first force level sensor module; The first force level sensor module includes a first layer of pressure dividing unit, a second layer of pressure dividing unit, 9 standard sensors and a chassis which are arranged in sequence from top to bottom, and the 9 standard sensors are arranged in parallel on the chassis; The first-layer voltage divider unit includes a first voltage divider, the first voltage divider includes a first disk body and three first pressure heads, and the first pressure heads are located below the first disk body; The second-layer voltage divider unit includes three second voltage dividers, which are respectively located directly below the three first pressure heads, each of which includes a second disk and three second pressure heads, the second pressure head is located below the second disk, the second disk contacts the bottom surface of the first pressure head directly above it, and a standard sensor is correspondingly arranged below each second pressure head; The second force level sensor module includes a pressure head and a standard sensor, the pressure head contacts the top surface of the standard sensor, and the force applying component of the second force level force source contacts the bottom surface of the standard sensor.
2. The force applying mechanism of the force measuring device according to claim 1, characterized in that: When measuring force, one of the first force measuring path and the second force measuring path is selected to measure force alone.
3. The force applying mechanism of the force measuring device according to claim 1, characterized in that: When measuring force, the first force measuring path and the second force measuring path act together.
4. The force applying mechanism of the force measuring device according to claim 1, characterized in that: The first force level source and the second force level source are any one of an air cylinder, an oil cylinder, a water cylinder and a mechanical linear jacking mechanism, or a combination of multiple thereof.
5. The force applying mechanism of the force measuring device according to claim 1, characterized in that: The maximum force measurement value of the first force level sensor module is 9 times the maximum force measurement value of the second force level sensor module.
6. The force applying mechanism of the force measuring device according to claim 1, characterized in that: The first force level force source is arranged in an annular structure, and the second force level force source and the second force level sensor module are located in the annular inner ring space of the first force level force source.
7. The force applying mechanism of the force measuring device according to claim 6, characterized in that: An outer retaining ring and an inner retaining ring are installed on the lower surface of the chassis of the first force level sensor module. The inner diameter of the outer retaining ring is slightly larger than the top outer diameter of the force-applying component of the first force level force source, and the inner diameter of the inner retaining ring is slightly larger than the top outer diameter of the pressure head of the second force level sensor module.