Static Gravity Force Standard Machine

Abstract

The present invention provides a static weight force standard machine, which includes a basic frame, a force value loading and unloading mechanism installed on the bottom plate of the basic frame, a weight string installed in the basic frame, located above the force value loading and unloading mechanism, and the weight string is connected to the force value loading and unloading mechanism; a tension test platform and a pressure test platform are connected up and down to form a frame structure, which is installed on the top of the basic frame; a reverse frame is installed between the tension test platform and the pressure test platform, so that a tension test space is formed between the reverse frame and the tension test platform, a pressure test space is formed between the reverse frame and the pressure test platform, and the reverse frame is connected to the weight string; a sensor height recognition mechanism is installed above the tension test platform and connected to the reverse frame. The present invention can automatically identify the height of the sensor to be tested, and then automatically adjust the initial state of the test, and is applicable to both compression test and tension test. The static weight force standard machine has a simple and compact structure, simple action, and low cost.

Description

Technical Field

[0001] The invention relates to the technical field of mass standard measurement, in particular to a static gravity force standard machine with an automatic detection structure for a measured sensor. Background Art

[0002] In the prior art, there are two main solutions for static gravity force standard machines to adapt to the different heights of the sensors being tested. One is to equip a large number of adjustment pads and pulling test fixtures, and to make the sensor reach the required height of the force standard machine by adding or removing adjustment pads or adjusting the length of the pulling test fixture; the other is to use a moving crossbeam structure to adapt to the height of the sensor by changing the position of the moving crossbeam.

[0003] The former method requires a large number of adjustment pads and test fixtures, and the height adjustment is cumbersome and labor-intensive. The latter method has a large structure, complex movements, high costs, and an unstable test reference surface, making it inconvenient to perform pull tests because the movable crossbeam is a load-bearing platform and needs to move up and down.

[0004] In view of this, those skilled in the art are in urgent need of improving the mechanism of the static gravity force standard machine in order to overcome the above-mentioned defects. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a static gravity force standard machine to overcome the defects of the prior art static gravity force standard machine such as its inability to adapt to tested sensors of different heights, its bulky structure, cumbersome operation and high cost.

[0006] The present invention solves the above technical problems through the following technical solutions:

[0007] A static gravity force standard machine, characterized in that the static gravity force standard machine comprises:

[0008] A basic frame, a force adding and unloading mechanism and a weight string, wherein the force adding and unloading mechanism is mounted on a bottom plate of the basic frame, and the weight string is mounted inside the basic frame and located above the force adding and unloading mechanism;

[0009] A tensile testing platform and a pressure testing platform, wherein the tensile testing platform and the pressure testing platform are fixedly connected up and down to form a frame structure and are installed on the top of the basic frame;

[0010] A reverse frame is installed between the tensile testing platform and the compression testing platform, so that a tensile testing space is formed between the reverse frame and the tensile testing platform, and a compression testing space is formed between the reverse frame and the compression testing platform, and the reverse frame is installed in the basic frame and movably connected to the weight string;

[0011] A sensor height recognition mechanism is installed above the pulling and testing platform and is movably connected to the reverse frame.

[0012] According to an embodiment of the present invention, the tensile testing platform and the compressive testing platform are fixedly connected via a plurality of columns to form a hollow frame structure.

[0013] According to one embodiment of the present invention, the reverse frame includes a loading beam, a weight hanging beam and a pull rod, the two ends of the loading beam are respectively movably connected to the sensor height identification mechanism through the hanger rod, the upper end of the pull rod is fixedly connected to the loading beam, and the lower end of the pull rod passes through the pressure measurement platform into the interior of the basic frame and is fixedly connected to the weight hanging beam. The weight hanging beam is installed inside the basic frame and is movably connected to the weight string. The lower end of the loading beam is provided with a loading head for compression testing, and the upper end is provided with a connecting thread for tension testing.

[0014] According to one embodiment of the present invention, the sensor height identification mechanism includes a first drive system, a mounting plate, a position plate, a first displacement sensor, a hanging beam, a hanging rod, a guide mechanism and a reverse frame sensing switch. The mounting plate is fixed above the pulling test platform, the first drive system and the first displacement sensor are mounted on the mounting plate, the hanging beam is located below the mounting plate and is fixedly connected to the first drive system, the lower end of the position plate is mounted on the hanging beam, the upper end of the position plate is connected to the first displacement sensor after passing through the mounting plate, the position plate is equipped with upper and lower limit switches, the upper end of the hanging rod is fixedly connected to the hanging beam, the lower end of the hanging rod passes through the guide mechanism, the lower end of the hanging rod passes through the corresponding holes at both ends of the reverse frame loading beam to form a movable connection, and the reverse frame sensing switch is mounted at the lower end of the hanging rod, located below the reverse frame loading beam.

[0015] According to an embodiment of the present invention, the guide mechanism in the sensor height recognition mechanism is installed on the test column, the guide mechanism is located on both sides of the loading beam, and the position of the guide mechanism relative to the loading beam is adjustable.

[0016] According to one embodiment of the present invention, the force loading and unloading mechanism includes a second driving system, a second displacement sensor, a weight tray, a weight support bolt, a guide bearing and a limit switch, the lower part of the second driving system is fixed to the bottom plate of the basic frame; the weight tray is installed on the upper part of the second driving system; the lower part of the second displacement sensor is fixed to the bottom plate, and the upper part thereof is connected to the weight tray; the weight support bolt is installed on the weight tray, and its height is adjustable.

[0017] According to one embodiment of the present invention, the inner ring of the guide bearing cooperates with the main column of the basic frame, and the outer ring thereof is fixed to the weight tray; the limit switch is installed on the main column of the basic frame, and is located above and below the weight tray to control the upper and lower limit positions of the weight tray respectively.

[0018] According to one embodiment of the present invention, the lower end surface of the weight string is placed on the weight support bolt; the upper end of the weight string passes through the weight suspension beam of the reverse frame to form a movable connection; the orientation of the weight string can be fine-tuned by the weight support bolt.

[0019] The positive and progressive effects of the present invention are:

[0020] The static gravity force standard machine of the present invention can automatically identify the height of the sensor to be tested, and then automatically adjust the initial state of the test, and is applicable to both compression test and tension test. The entire test process does not require manual replacement of adjustment pads or test fixtures. The static gravity force standard machine has a simple and compact structure, simple operation, and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which the same reference numerals always represent the same features, wherein:

[0022] Figure 1 It is a three-dimensional diagram of the static gravity force standard machine of the present invention.

[0023] Figure 2 for Figure 1 Magnified view of part C.

[0024] Figure 3 It is the front view of the static gravity force standard machine of the present invention.

[0025] Figure 4 It is a structural schematic diagram of the sensor height recognition mechanism in the static gravity force standard machine of the present invention.

[0026] Figure 5 It is a structural schematic diagram of the reverse frame in the static gravity force standard machine of the present invention.

[0027] Figure 6 It is a structural schematic diagram of the force value loading and unloading mechanism in the static gravity force standard machine of the present invention.

[0028] [Reference Signs]

[0029] Basic Framework 10

[0030] Force loading and unloading mechanism 20

[0031] Weight string 30

[0032] Pull test platform 40

[0033] Stress Testing Platform 50

[0034] Reverse rack 60

[0035] Sensor height recognition mechanism 70

[0036] First drive system 71

[0037] Mounting plate 72

[0038] Position plate 73

[0039] First displacement sensor 74

[0040] Lifting beam 75

[0041] Boom 76

[0042] Guide mechanism 77

[0043] Reverse frame sensor switch 78

[0044] Loading beam 61

[0045] Loading head 62

[0046] Tie rod 63

[0047] Weight lifting beam 64

[0048] Test column 41

[0049] Bottom plate 11

[0050] Main column 12

[0051] Second drive system 21

[0052] Second displacement sensor 22

[0053] Weight tray 23

[0054] Weight support bolt 24

[0055] Guide bearing 25

[0056] Limit switch 26

[0057] Pull test space A

[0058] Stress testing space B DETAILED DESCRIPTION

[0059] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0060] Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to preferred embodiments of the present invention, examples of which are shown in the accompanying drawings. Wherever possible, the same reference numerals will be used throughout the drawings to represent the same or similar parts.

[0061] Furthermore, although the terms used in the present invention are selected from well-known and commonly used terms, some terms mentioned in the present invention specification may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description of this document.

[0062] Furthermore, it is required that the present invention be understood not only by the actual terms used but also by the meanings connoted by each term.

[0063] Figure 1 It is a three-dimensional diagram of the static gravity force standard machine of the present invention. Figure 2 for Figure 1 Magnified view of part C. Figure 3 It is the front view of the static gravity force standard machine of the present invention. Figure 4 It is a structural schematic diagram of the sensor height recognition mechanism in the static gravity force standard machine of the present invention. Figure 5 It is a structural schematic diagram of the reverse frame in the static gravity force standard machine of the present invention. Figure 6 It is a structural schematic diagram of the force value loading and unloading mechanism in the static gravity force standard machine of the present invention.

[0064] like Figures 1 to 6 As shown, the present invention discloses a static weight force standard machine, which includes a basic frame 10, a force value loading and unloading mechanism 20, a weight string 30, a tension test platform 40, a compression test platform 50, a reverse frame 60 and a sensor height recognition mechanism 70. Among them, the force value loading and unloading mechanism 20 is installed on the bottom plate 11 of the basic frame 10, and the weight string 30 is installed in the basic frame 10, placed above the force value loading and unloading mechanism 20, and in contact with the weight support bolt 24.

[0065] The tensile test platform 40 and the pressure test platform 50 are connected by a plurality of test columns 41 to form a frame structure, which is installed on the top of the base frame 10. The reverse frame 60 includes a loading beam 61, a loading head 62, a pull rod 63 and a weight hanging beam 64. The loading beam 61 is located between the tensile test platform 40 and the pressure test platform 50, so that a tensile test space A is formed between the loading beam 61 and the tensile test platform 40, a pressure test space B is formed between the loading beam 61 and the pressure test platform 50, and the weight hanging beam 64 is connected to the weight string 30. The sensor height recognition mechanism 70 is installed above the tensile test platform 40, and its hanging rod 76 is connected to the loading beam 61.

[0066] Preferably, the sensor height recognition mechanism 70 includes a first drive system 71, a mounting plate 72, a position plate 73, a first displacement sensor 74, a suspension beam 75, a suspension rod 76, a guide mechanism 77 and a reverse frame induction switch 78. The first drive system 71 and the first displacement sensor 74 are mounted on the mounting plate 72, the mounting plate 72 is fixed above the pull-test platform 40, the suspension beam 75 is located below the mounting plate 72 and fixed to the first drive system 71, the lower end of the position plate 73 is fixed to the suspension beam 75, the upper end of the position plate 73 is connected to the first displacement sensor 74 after passing through the mounting plate 72, the position plate 73 is equipped with upper and lower limit switches, the upper end of the suspension rod 76 is connected to the suspension beam 75, the lower end of the suspension rod 76 is connected to the loading beam 61 after passing through the pull-test platform 40 downward, and the reverse frame induction switch is mounted on the lower end surface of the suspension rod and is located below the loading beam 61.

[0067] Furthermore, a guide mechanism 77 is provided on the suspension rod 76, and the guide mechanism 77 is installed on the test column 41, and the guide mechanism 77 is located on both sides of the loading beam 61, and the spacing between the two can be adjusted. A loading head 61 is provided on the lower end surface of the loading beam 61 for compression testing, and a connecting thread is provided on the upper end surface for pulling testing. Both ends of the loading beam 61 are also connected to a pull rod 63 extending downward, and the lower end of the pull rod 63 is connected to a weight suspension beam 64, which is mainly used for loading weights, such as the weights of the weight string 30.

[0068] Furthermore, the force loading and unloading mechanism 20 includes a second driving system 21, a second displacement sensor 22, a weight tray 23, a weight support bolt 24, a guide bearing 25 and a limit switch 26. The second driving system 21 is fixed on the bottom plate 11 of the base frame 10, the weight tray 23 is installed on the upper part of the second driving system 21, and the second displacement sensor 22 is connected between the weight tray 23 and the bottom plate 11.

[0069] A guide bearing 25 is also provided between the main column 12 and the weight tray 23. The inner ring of the guide bearing 25 matches the main column 12, and the outer ring is connected to the weight tray 23. Limit switches 26 are respectively installed above and below the weight tray 23. The limit switches 26 are fixed on the main column 12 and the position can be adjusted. The weight support bolt 24 is installed on the weight tray 23, and the height can be adjusted to fine-tune the orientation state of the weight string 30.

[0070] Furthermore, the lower end surface of the weight string 30 is placed on the weight support bolt 24 of the force loading and unloading mechanism 20, and the upper end of the weight string 30 passes through the weight suspension beam 64 and forms a movable connection therewith.

[0071] According to the above structural description, the pressure test platform 50 and the tension test platform 60 in the static gravity force standard machine of the present invention are fixed on the basic frame 10, the area between the loading beam 61 and the pressure test platform 50 is the pressure test space B, and the area between the loading beam 61 and the tension test platform 40 is the tension test space A. The sensor height recognition mechanism 70 has a separate drive system and its own position control and feedback device. The sensor height recognition mechanism 70 can drive the reverse frame 60 to move. When the reverse frame 60 acts on the sensor, the reverse frame 60 will separate from the sensor height recognition mechanism 70.

[0072] Similarly, the force value loading and unloading mechanism 20 also has a separate drive system, with its own position control and feedback device. The force value loading and unloading mechanism 20 drives the weight string 30 to move and output the standard force value. The sensor height recognition mechanism 70 and the force value loading and unloading mechanism 20 work together to automatically recognize the height of the sensor being tested and automatically adjust the initial state of the force machine according to the height of the sensor being tested. The compression test is the same as the tension test.

[0073] The sensor height recognition mechanism 70 and the force value loading and unloading mechanism 20 in the static gravity force standard machine of the present invention both have their own initial origin positions, and can also be manually controlled to move to the required positions. There is a certain internal logical relationship between the positions of the two, and the two can act synchronously or independently. The reverse frame 60 is driven by the sensor height recognition mechanism 70. The position of the sensor height recognition mechanism can be manually controlled to adjust the height of the reverse frame, which is convenient for the installation and alignment of the sensor to be measured. The weight string 30 is driven by the force value loading and unloading mechanism 20. The position of the force value loading and unloading mechanism 20 can be manually controlled to control the output of the required standard force value, which is convenient for the use, inspection and maintenance of the force machine.

[0074] When the static weight force standard machine is used for compression testing, the height between the loading beam 61 of the reverse frame 60 and the pressure test platform 50 is manually adjusted, the sensor to be tested is placed on the pressure test platform 50, the sensor to be tested is installed and aligned, and the automatic test is started after the relevant parameters of the sensor to be tested are input. The sensor height recognition mechanism 70 and the force value loading and unloading mechanism 20 act synchronously, and respectively drive the reverse frame 60 and the weight string 30 to move downward. Until the loading beam 61 of the reverse frame 60 contacts the sensor to be tested, the reverse frame 60 is disengaged from the sensor height recognition mechanism 70, triggering the reverse frame sensing switch 78. The sensor height recognition mechanism 70 records the height of the reverse frame 60 when the reverse frame 60 is disengaged from it.

[0075] The control system calculates the initial position and force zero position of the reverse frame 60 corresponding to the sensor height according to this height. Then, the force loading and unloading mechanism 20 is activated, driving the weight string 30 to the force zero position. The sensor height recognition mechanism 70 is activated, driving the reverse frame 60 to the test initial position. At this point, the automatic height recognition of the pressure sensor and the automatic adjustment of the test initial position are completed, and the corresponding standard force value can be applied to the sensor under test.

[0076] When the static gravity force standard machine is used for the pulling test, the height between the loading beam 61 of the reverse frame 60 and the pulling test platform 40 is manually adjusted, and one end of the sensor to be tested is connected to the pulling test platform 40, and the other end is connected to the loading beam 61. The sensor to be tested is installed and positioned properly, and the automatic test is started after the relevant parameters of the sensor to be tested are input. The sensor height recognition mechanism 70 and the force value loading and unloading mechanism 20 act synchronously, driving the reverse frame 60 and the weight string 30 to move downward respectively. Until the reverse frame 60 is pulled by the sensor to be tested, the reverse frame 60 is disengaged from the sensor height recognition mechanism 70, triggering the reverse frame sensing switch 78. The sensor height recognition mechanism 70 records the height of the reverse frame 60 when the reverse frame 60 is disengaged from it.

[0077] The control system calculates the initial position and force zero position of the reverse frame 60 corresponding to the sensor height according to this height. Then, the value-added loading and unloading mechanism 20 is activated, driving the weight string 30 to the force zero position; the sensor height recognition mechanism 70 is activated, driving the reverse frame 60 to the test initial position. At this point, the automatic height recognition and initial position adjustment of the tensile sensor are completed, and the corresponding standard force value can be applied to the sensor under test.

[0078] After the test is completed, the static gravity force standard machine returns to the initial state corresponding to the sensor being tested, and the sensor can be replaced to start a new test. If there is no sensor to be tested, the static gravity force standard machine will automatically reset, and the sensor height recognition mechanism 70 and the force value loading and unloading mechanism 20 will return to their respective initial origin positions.

[0079] It can be seen that the entire process of automatically identifying the height of the sensor to be tested by the static gravity force standard machine is mainly divided into two steps. The first step is to determine the height of the sensor to be tested after it is installed in place; the second step is to adjust the force machine to the corresponding initial state of the test according to this height. The first step is mainly completed by the height recognition mechanism 70, and the force value loading and unloading mechanism 20 is supplemented to ensure that the reverse frame 60 can smoothly and accurately contact the sensor to be tested and detect its height. Optimizing the operating speed and operating rhythm of the height recognition mechanism can not only improve the accuracy of the height judgment of the sensor to be tested, but also improve the test efficiency. The second step is mainly completed by the force value loading and unloading mechanism 20, and the height recognition mechanism 70 is supplemented to ensure that the position of the reverse frame 60 and the standard force value zero point position match the height of the sensor to be tested.

[0080] In summary, the static gravity force standard machine of the present invention can automatically identify the height of the sensor under test, and then automatically adjust the initial state of the test, and is applicable to both compression tests and tension tests. The entire test process does not require manual replacement of the adjustment pad. The static gravity force standard machine has a simple and compact structure, simple operation, and low cost. The static gravity force standard machine can adapt to sensors under test of different heights, does not require a large number of adjustment pads and test fixtures, and saves adjustment work before testing. At the same time, it also simplifies the force machine structure and saves costs. The compression test platform and the tension test platform are fixed to ensure the consistency and accuracy of the test results.

[0081] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A static gravity force standard machine, characterized in that: The static gravity force standard machine comprises: A basic frame, a force adding and unloading mechanism and a weight string, wherein the force adding and unloading mechanism is mounted on a bottom plate of the basic frame, and the weight string is mounted inside the basic frame and located above the force adding and unloading mechanism; A tensile testing platform and a pressure testing platform, wherein the tensile testing platform and the pressure testing platform are fixedly connected up and down to form a frame structure and are installed on the top of the basic frame; A reverse frame is installed between the tensile testing platform and the compression testing platform, so that a tensile testing space is formed between the reverse frame and the tensile testing platform, and a compression testing space is formed between the reverse frame and the compression testing platform, and the reverse frame is installed in the basic frame and movably connected to the weight string; A sensor height recognition mechanism, the sensor height recognition mechanism is installed above the pulling test platform and is movably connected to the reverse frame; The sensor height recognition mechanism is provided with a separate driving system, position control and feedback device, and the sensor height recognition mechanism drives the reverse frame to move. When the reverse frame acts on the sensor to be measured, the reverse frame is separated from the sensor height recognition mechanism; The force value adding and unloading mechanism is provided with a separate driving system, position control and feedback device, and the force value adding and unloading mechanism drives the weight string to move and outputs a standard force value; The sensor height recognition mechanism and the force value loading and unloading mechanism work together to automatically recognize the height of the sensor being measured and automatically adjust the initial state of the force machine according to the height of the sensor being measured.

2. The static gravity force standard machine according to claim 1, characterized in that: The tensile test platform and the compressive test platform are fixedly connected via a plurality of test columns to form a hollow frame structure.

3. The static gravity force standard machine according to claim 2, characterized in that: The reverse frame includes a loading beam, a weight hanging beam and a pull rod, the two ends of the loading beam are respectively movably connected to the sensor height identification mechanism through the hanger rod, the upper end of the pull rod is fixedly connected to the loading beam, and the lower end of the pull rod passes through the pressure measurement platform into the interior of the basic frame and is fixedly connected to the weight hanging beam. The weight hanging beam is installed inside the basic frame and is movably connected to the weight string. The lower end of the loading beam is provided with a loading head for compression testing, and the upper end is provided with a connecting thread for tension testing.

4. The static gravity force standard machine according to claim 2, characterized in that: The sensor height identification mechanism includes a first drive system, a mounting plate, a position plate, a first displacement sensor, a suspension beam, a suspension rod, a guide mechanism and a reverse frame sensing switch. The mounting plate is fixed above the pulling test platform, the first drive system and the first displacement sensor are mounted on the mounting plate, the suspension beam is located below the mounting plate and is fixedly connected to the first drive system, the lower end of the position plate is mounted on the suspension beam, the upper end of the position plate passes through the mounting plate and is connected to the first displacement sensor, the position plate is provided with upper and lower limit switches, the upper end of the suspension rod is fixedly connected to the suspension beam, the lower end of the suspension rod passes through the guide mechanism, the lower end of the suspension rod passes through the corresponding holes at both ends of the reverse frame loading beam to form a movable connection, and the reverse frame sensing switch is mounted at the lowest end of the suspension rod and is located below the reverse frame loading beam.

5. The deadweight force standard machine according to claim 4, characterized in that: The guide mechanism in the sensor height recognition mechanism is installed on the test column. The guide mechanism is located on both sides of the loading beam and its position relative to the loading beam can be adjusted.

6. The static gravity force standard machine according to claim 1, characterized in that: The force loading and unloading mechanism includes a second driving system, a second displacement sensor, a weight tray, a weight support bolt, a guide bearing and a limit switch. The lower part of the second driving system is fixed to the bottom plate of the basic frame; the weight tray is installed on the upper part of the second driving system; the lower part of the second displacement sensor is fixed to the bottom plate, and its upper part is connected to the weight tray; the weight support bolt is installed on the weight tray, and its height is adjustable.

7. The static gravity force standard machine according to claim 6, characterized in that: The inner ring of the guide bearing cooperates with the main column of the basic frame, and the outer ring thereof is fixed to the weight tray; the limit switch is installed on the main column of the basic frame, and is located above and below the weight tray to control the upper and lower limit positions of the weight tray respectively.

8. The static gravity force standard machine according to claim 6, characterized in that: The lower end surface of the weight string is placed on the weight support bolt; the upper end of the weight string passes through the weight suspension beam of the reverse frame to form a movable connection; the orientation of the weight string can be fine-tuned by the weight support bolt.

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