Rotary pressure sensor fatigue test device

Abstract

The present invention discloses a fatigue testing device for a rotary pressure sensor, comprising a workbench, a force loading device connected to the workbench, a plurality of groups of detection components installed on the workbench, and a detection sensor installed on the workbench. The ends of adjacent detection components are connected by a steering component to form a rotary detection structure. Each group of the detection components comprises a plurality of sensors to be tested which are connected end to end. The force loading device is connected to the head of the rotary detection structure for force loading, and the detection sensor is connected to the tail of the rotary detection structure for data detection. The loading force of the force loading device of the present invention is transmitted in sequence through adjacent sensors to be tested, and a plurality of sensors to be tested can be tested at the same time, and the test efficiency is high. Each sensor to be tested adopts a serial rotary structure, so that its layout is flexible and can adapt to different layout sites, and the occupied space of the fatigue testing device is also reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of sensor detection and relates to a fatigue testing device for a rotary pressure sensor. Background Art

[0002] Pressure sensors are widely used in many fields such as medicine, industry, national defense, aviation, etc. Therefore, sensors have an indispensable and important position in modern industry. Almost every design and application of modern projects cannot be separated from various sensors. The detection of sensor quality has become particularly important. In order to perform fatigue tests on pressure sensors, there are currently fatigue test devices with various structures. The principle is generally to use a manual loading mechanism or a hydraulic or pneumatic loading mechanism to provide loading force to the pressure sensor. The pressure sensor is connected to the controller, which records the test value and performs analysis and calculation. Fatigue tests are performed through repeated loading and unloading.

[0003] First, in order to simultaneously detect multiple sensors, especially for large-sized tensile sensors with long lengths, the existing test equipment is often large in size and occupies a large space, which is not conducive to the conduct of experiments; secondly, the existing test equipment uses hydraulic and pneumatic power sources for loading, and the gas and liquid compression problem makes it difficult to ensure that the loading force is constant, and the loading force is difficult to control accurately; moreover, the loading force of the existing test device acts directly on the pressure sensor, and this loading force changes instantaneously. The stability and reliability of the loading are insufficient, which is not conducive to the control of the loading force and is likely to cause damage to the pressure sensor.

[0004] Therefore, a rotary pressure sensor fatigue test device is needed, which can detect multiple sensors at the same time, occupies a small space, is easy to arrange, and the loading force can be continuously and stably applied to the pressure sensor; Summary of the invention

[0005] In view of this, the present invention provides a rotary pressure sensor fatigue test device, which can detect multiple sensors at the same time, occupies a small space, is easy to arrange, and the loading force can be continuously and stably applied to the pressure sensor;

[0006] The rotary pressure sensor fatigue testing device of the present invention comprises a workbench, a force loading device connected to the workbench, a plurality of groups of detection components installed on the workbench, and a detection sensor installed on the workbench. The adjacent detection components are connected head to tail through a steering component to form a rotary detection structure. Each group of the detection components comprises a plurality of sensors to be tested which are connected head to tail. The force loading device is connected to the head of the rotary detection structure for force loading, and the detection sensor is connected to the tail of the rotary detection structure for data detection.

[0007] Furthermore, the force loading device includes a loading lever that can swing vertically, a driving assembly that drives the loading lever to swing, a loading column with a horizontally arranged axis and that can slide axially, and a loading rope that drives the loading column to slide axially, the loading rope is connected to the loading column and the two ends of the loading rope are respectively connected to the two ends of the loading lever by bypassing the guide device, and the end of the loading column is connected to the head of the rotation detection structure.

[0008] Furthermore, the steering assembly comprises an equal-arm lever which is horizontally arranged on the workbench and can swing horizontally, and two ends of the equal-arm lever are respectively rotatably matched with the head and tail of the adjacent transmission assembly.

[0009] Furthermore, adjacent sensors to be tested in each group of the detection components, the sensors to be tested and the steering component, and the sensors to be tested and the force loading device are connected via a conductive column, and the conductive column can be axially slidably installed in the linear bearing seat.

[0010] Furthermore, the driving assembly includes a crankshaft rotatably mounted on a workbench, a crank connecting rod rotatably engaged with the crankshaft, and a driving member driving the crankshaft to rotate, and the other end of the crank connecting rod rotatably engages with one end of a loading lever.

[0011] Furthermore, each of the conductive columns is equipped with an anti-rollover device, at least one end of the conductive column is a plate-like structure, and the anti-rollover device includes two sets of anti-rollover bearings rotatably engaged on the workbench, and the two sets of anti-rollover bearings are clamped on both sides of the end of the conductive column plate-like structure.

[0012] Furthermore, the loading rope is a segmented structure including a right loading rope and a left loading rope, the right loading rope is wound around the right pulley, one end of the right loading rope is vertically connected to the right end of the lever, and the other end bypasses the right pulley and is horizontally connected to the end of the loading column axially away from the sensor to be tested, the left loading rope includes two ropes respectively wound around two left pulleys, the left and right pulleys are rotatably matched on the workbench, one end of the two left loading ropes is vertically connected to the left rope clamp, the left rope clamp is connected to the left end of the loading lever, and the other end bypasses the left pulley and is horizontally connected to the rope pin, the rope pin is connected to the end of the loading column axially close to the sensor to be tested, and the two left loading ropes are arranged on both horizontal sides of the head of the rotation detection structure.

[0013] Furthermore, both ends of the loading lever are detachably connected with loading weights.

[0014] Furthermore, connecting rods are connected at both ends of the loading lever, one of which is threaded vertically connected to one end of the loading lever, and the other connecting rod can slide vertically through the other end of the loading lever, the two connecting rods are connected to both ends of the loading rope, and the loading weights are detachably connected to the connecting rods.

[0015] Furthermore, a weight plate with a diameter larger than that of the connecting rod is connected to the bottom of the connecting rod, and a waist hole is opened at one end of the loading lever, and the connecting rod can slide through the waist hole.

[0016] Beneficial effects of the present invention:

[0017] The loading force of the force loading device of the present invention is transmitted sequentially through adjacent sensors to be tested, and multiple sensors to be tested can be tested simultaneously, and the test efficiency is high. Each sensor to be tested adopts a series rotary structure, so that the arrangement is flexible and can adapt to different arrangement sites, and the occupied space of the fatigue test device is also reduced;

[0018] The present invention uses a loading lever as a force loading structure, and can provide a reciprocating pressure and tension alternating loading force for the sensor to be tested through the loading lever. The loading force is constant and accurately controlled. The length of the swing arms on both sides of the loading lever can be adjusted to adjust the size of the pressure and tension to realize unequal loading of the tension and pressure. The loading lever is particularly suitable for loading equal pressure and tension. The loading lever adopts an equal-arm lever to facilitate equal loading of pressure and tension to improve the detection accuracy. The cooperation of the loading lever and the loading rope utilizes the flexible and steerable characteristics of the loading rope, which facilitates the overall arrangement of the force loading device.

[0019] The present invention uses an equal-arm lever as a rotary structure to realize a rotation of 180°. The structure can greatly reduce the occupied space of the fatigue test device, reduce the occupied space of its layout, and thus reduce the difficulty of layout, so as to form a mechanical rotation and ensure force rotation, and ensure that the forces of the two groups of detection components are the same, so as to achieve equal transmission of loading forces, and ensure that the pressure or tension type of the sensors to be tested in each group of detection components is the same, so that the forces of each sensor to be tested are unified, so as to ensure that the force conditions of the sensors to be tested are consistent, and improve the detection accuracy;

[0020] The present invention transmits the loading force through the conductive column. The conductive column serves as an intermediate component, and the loading force does not directly act on the sensor to be tested, thereby improving the stability and reliability of the loading force, avoiding sudden changes in the loading force acting on the sensor to be tested, facilitating reliable control of the loading force, and effectively protecting the sensor to be tested from damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention (with a workbench);

[0023] Figure 2 It is a schematic diagram of the overall structure of the present invention (without a workbench);

[0024] Figure 3Schematic diagram of the force loading device structure Figure 1 ;

[0025] Figure 4 Schematic diagram of the force loading device structure Figure 2 ;

[0026] Figure 5 for Figure 4 A schematic diagram of the enlarged structure of point A;

[0027] Figure 6 It is a schematic diagram of the steering component structure;

[0028] Figure 7 for Figure 2 Schematic diagram of the structure at point B;

[0029] Figure 8 This is a schematic diagram of the anti-flip device structure; DETAILED DESCRIPTION

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention (with a workbench); Figure 2 It is a schematic diagram of the overall structure of the present invention (without a workbench); Figure 3 Schematic diagram of the force loading device structure Figure 1 ; Figure 4 Schematic diagram of the force loading device structure Figure 2 ; Figure 5 for Figure 4 A schematic diagram of the enlarged structure of point A; Figure 6 It is a schematic diagram of the steering component structure; Figure 7 for Figure 2 Schematic diagram of the structure at point B; Figure 8 This is a schematic diagram of the anti-flip device structure;

[0031] As shown in the figure: the rotary pressure sensor fatigue test device of this embodiment includes a workbench 19, a force loading device connected to the workbench, several groups of detection components installed on the workbench, and a detection sensor 1 installed on the workbench. The adjacent detection components are connected head to tail through a steering component to form a rotary detection structure. Each group of the detection components includes several sensors 2 to be tested that are connected head to tail. The force loading device is connected to the head of the rotary detection structure for force loading, and the detection sensor is connected to the tail of the rotary detection structure for data detection.

[0032] Combination Figure 1As shown, the workbench is a table-like structure formed by a desktop and four legs, but the workbench is not limited to this structure, and the workbench can also be a mounting frame or a concrete foundation for installing various components, which will not be described in detail; multiple groups of detection components can be set, and multiple groups of detection components are connected in sequence to form a rotating structure, which can rotate 90°, 180° or other rotation angles. The specific rotation direction and rotation angle can be adaptively adjusted according to the actual layout space of the site, and the number of sensors to be tested in each group of detection components can be adaptively adjusted according to the actual layout site and the length of the sensors to be tested. The detection sensor 1 is located at the tail of the rotary detection structure and is used to collect force data transmitted to the detection sensor. When any of the sensors to be tested fails due to fatigue cracks or fatigue fractures, the force data at the detection sensor becomes abnormal. In this implementation, the detection sensor also uses a pressure sensor, which is a prior art and will not be described in detail; in this embodiment, two groups of detection components, each group of detection components has two sensors to be tested, and the rotation angle is 180° as an example. In this embodiment, only one steering component needs to be set to meet the steering requirements, combined with Figure 1 and Figure 2 As shown, the force loading device is installed on the right side of the workbench, the steering assembly is installed on the left side of the workbench, the detection assembly is located between the force loading device and the steering assembly, the sensor to be tested is a columnar structure, and the loading force of the force loading device is transmitted in sequence through adjacent sensors to be tested, and multiple sensors to be tested can be tested at the same time, and the test efficiency is high. Each sensor to be tested adopts a series rotary structure, which makes its layout flexible, can adapt to different layout sites, and reduce the occupied space of the fatigue test device.

[0033] In this embodiment, the force loading device includes a loading lever 3 that can swing vertically, a driving component that drives the loading lever to swing, a loading column 4 with a horizontally arranged axis and axially slidable, and a loading rope 5 that drives the loading column to slide axially, the loading rope is connected to the loading column and the two ends are respectively connected to the two ends of the loading lever by bypassing the guide device, and the end of the loading column is connected to the head of the rotation detection structure; the loading rope can be a one-stage structure, the middle position of the loading rope is fixedly connected to the loading column, and the two ends of the loading rope are connected to the two ends of the loading lever. Specifically, a connecting hole can be axially opened on the loading column, the loading rope passes through the connecting hole and is fastened by radial screws. Of course, other connecting structures can also be used and the details are not repeated here. The loading rope can also adopt a two-stage structure, and the two ends of the two sections of the loading rope are respectively connected to the two ends of the loading column and the two ends of the loading lever. The details are not repeated here; combined Figures 1 to 4As shown, the middle part of the loading lever is rotatably matched with the bottom of the workbench, and a mounting frame 20 is arranged at the bottom of the workbench. The middle part of the loading lever is rotatably matched with the mounting frame. The loading rope is vertically connected to the two ends of the loading lever, and the middle part of the loading rope is horizontally connected to the loading column. The loading lever is driven to swing by the driving assembly, thereby driving the two ends of the loading rope to reciprocate vertically. The vertical motion of the two ends of the loading rope is converted into the horizontal motion of the middle part of the loading rope by the guide device. The guide device can be a guide wheel or a guide shaft. The middle position of the loading rope drives the axial horizontal motion of the loading column. The horizontal reciprocating motion of the loading column provides reciprocating and alternating compression and tension loading forces for the sensor to be tested.

[0034] By adjusting the length of the swing arms on both sides of the loading lever, the swing amplitude of the two ends of the loading lever is adjusted, and then the sliding stroke on both sides of the axis of the loading column 4 is adjusted to achieve unequal loading of pressure and tension. The loading lever is particularly suitable for loading equal pressure and tension. In this embodiment, the loading lever adopts an equal-arm lever to achieve equal loading of pressure and tension to improve the detection accuracy. Of course, according to the loading force required by different sensors to be tested, the length of the swing arms on both sides of the loading lever can be adjusted to adjust the corresponding pressure and tension. The details are not repeated here. The cooperation of the loading lever and the loading rope, using the flexible and steerable characteristics of the loading rope, is easy to arrange the overall force loading device;

[0035] In this embodiment, the steering assembly includes an equal-arm lever 6 which is horizontally arranged on a workbench and can swing horizontally, and the two ends of the equal-arm lever are respectively rotated to fit the head and tail of the adjacent transmission assembly; Figure 6 As shown, a steering seat 21 is installed on the left side of the workbench, and the steering seat has a horizontal installation cavity. The middle position of the equal-arm lever is located in the installation cavity and forms a horizontal rotation cooperation with the steering seat through a rotating shaft. The equal-arm lever is used as a rotation structure, and its rotation angle is 180°. This structure can greatly reduce the occupied space of the fatigue test device, thereby reducing the difficulty of layout. The equal-arm lever structure is set at the ends of the two groups of detection components, which can form a mechanical rotation structure, and can also ensure force rotation, and ensure that the two groups of detection components are subjected to the same force, realize equal transmission of loading force, and ensure that the pressure or tension type of the sensors to be tested in the two groups of detection components is the same, so that the force of each sensor to be tested is unified, that is, the force working condition of the sensor to be tested is guaranteed to be consistent, thereby improving the detection accuracy.

[0036] In this embodiment, adjacent sensors to be tested in each group of the detection components, the sensors to be tested and the steering component, and the sensors to be tested and the force loading device are connected through a conductive column 7, and the conductive column can be axially slidably installed in a linear bearing seat 8.

[0037] Combination Figure 3 and Figure 4As shown, the loading column is the conductive column at the force loading device, that is, the loading column and the conductive column at this location are the same component, the two ends of the loading column are plate-like structures, the plate-like structures at the two ends are perpendicular to each other, the left end of the loading column and the adjacent end of the sensor to be tested are rotatably matched through a hinge, and the hinge has a hinge shaft 23; the right end of the loading column is connected to a loading rope connecting shaft 22, and the right loading rope is wound around the loading rope connecting shaft 22 to form a connection with the right end of the conductive column, wherein the axes of the connecting shaft 22 and the hinge shaft 23 are perpendicular to each other and are commonly perpendicular to the axis of the loading column;

[0038] Combination Figure 6 As shown in other figures, the two ends of the conductive column 7 between the sensor to be tested and the steering assembly are also perpendicular to each other. The two ends are hinged to the adjacent ends of the sensor to be tested and the end of the equal-arm lever 6 through hinges. The hinge axes at the two ends of the conductive column are perpendicular to each other and are perpendicular to the axis of the conductive column. Figure 7 As shown, the two ends of the conductive column between the adjacent sensors to be tested are respectively hinged to the ends of the two adjacent sensors to be tested through hinges, and the hinge axes at the two ends of the conductive column are perpendicular to each other and are commonly perpendicular to the axis of the conductive column. This structure can improve the self-rotation of the conductive column;

[0039] Each conductive column and the linear bearing seat 8 form a linear bearing, which is used to form an axial sliding guide for the conductive column, so that the sensor to be tested is subjected to stable axial pressure and tension, and the sensor to be tested is prevented from being affected by bending moment and torque to affect the detection structure, and the sensor to be tested can be prevented from being damaged by bending moment or torque during the experiment. The linear bearing is suitable for a system with infinite linear motion, and has a small friction resistance, high motion accuracy, and fast and sensitive motion.

[0040] In this embodiment, the driving assembly includes a crankshaft 9 rotatably mounted on a workbench, a crank connecting rod 10 rotatably coupled with the crankshaft, and a driving member 11 for driving the crankshaft to rotate. The other end of the crank connecting rod rotatably couples with one end of a loading lever. Figure 3As shown, in this embodiment, the driving member is driven by a motor, and the motor drives the crankshaft through a reducer. The driving member is fixedly mounted on a motor mounting frame 24, and the motor mounting frame is mounted on a workbench. The crankshaft 9 is rotatably mounted on a crankshaft mounting frame 25. The crankshaft and the crankshaft mounting frame form a rotatable fit through a bearing. The driving member drives the crankshaft to rotate and drives the loading lever to swing up and down through a crank connecting rod. The swing of the lever is used to provide reciprocating and alternating tensile and compressive loading forces to the test sensor. The crank connecting rod cooperates with the loading lever mechanism to drive the loading lever to swing. One rotation of the crank is a loading cycle, which is convenient for realizing the loading of multiple alternating compressive stress and tensile stress. The loading force is continuous and stable, and can achieve millions of reciprocating rapid loading cycles. In addition, the overall assembly process of the crank connecting rod mechanism is relatively easy, and the cost and manufacturing cost are relatively low. In addition, the space occupied is relatively small, which improves the compactness of the structure of the fatigue test device.

[0041] In this embodiment, each of the conductive columns is equipped with an anti-rollover device, at least one end of the conductive column is a plate-like structure, and the anti-rollover device includes two sets of anti-rollover bearings 13 rotatably engaged with the workbench, and the two sets of anti-rollover bearings are clamped on both sides of the end of the conductive column plate-like structure; Figure 3 As shown, taking the conductive column at the force loading device, i.e., the loading column, as an example, the anti-rotation device matched with the loading column is shown in Figure 8 As shown, a rectangular anti-turnover frame 26 is installed on the workbench, and two bearing mounting shafts are vertically installed in the anti-turnover frame. A group of bearings is installed on each bearing mounting shaft. The end of the loading column is a vertically extending plate-like structure. Two groups of bearings are clamped on both sides of the end of the loading column. In this embodiment, each group of bearings includes two bearings. The two groups of bearings are clamped on both sides of the loading column to limit the rotation of the loading column around its own central axis, and at the same time reduce the friction force when the loading column slides axially. Figure 6 and Figure 7 As shown, an anti-rotation device is provided on one side of the linear bearing seat 8 at the connection between adjacent sensors to be tested and at the connection between the sensor to be tested and the steering assembly, and the details are not repeated here; this structure cooperates with the linear bearing seat to ensure the single-degree-of-freedom axial sliding of the conduction column to form an axially stable loading force transmission, which can prevent the conduction column from rotating and causing the sensor to be tested to be subjected to torque, thereby improving the detection accuracy.

[0042] In this embodiment, the loading rope is a segmented structure including a right loading rope 5a and a left loading rope 5b. The right loading rope is wound around the right pulley 14. One end of the right loading rope is vertically connected to the right end of the lever, and the other end bypasses the right pulley and is horizontally connected to the end of the loading column axially away from the sensor to be tested. The left loading rope includes two ropes respectively wound around two left pulleys 15. The left and right pulleys are rotatably matched on the workbench. One end of the two left loading ropes is vertically connected to the left rope clamp 16, and the left rope clamp is connected to the left end of the loading lever. The other end bypasses the left pulley and is horizontally connected to the rope pin 17. The rope pin is connected to the end of the loading column axially close to the sensor to be tested. The two left loading ropes are arranged on both sides of the horizontal head of the rotation detection structure; combined with Figure 3 and Figure 4 As shown, the rope pin 17 is an axial structure radially penetrating the left end of the loading column 4, and the outer circumferential axial sides of the rope pin 17 are provided with winding grooves, and the ends of the two left loading ropes 5b are respectively wound on the rope pins and located in the two winding grooves, and the two winding grooves are symmetrically arranged front and back with the central axis of the conduction column as the center to improve the force of the two left loading ropes 5b loaded on the loading column, and a pulley bracket 27 is installed on the workbench, and each pulley is rotatably mounted on the pulley bracket, and the two left pulleys are located on both sides of the loading column 4, and the loading column is coaxially connected to the adjacent sensor to be tested. The avoidance space between the two left pulleys is increased for the coaxial installation of the two, which is convenient for the coaxial arrangement of the loading column and the adjacent sensor to be tested, and the coaxial connection between the loading column and the adjacent sensor to be tested can ensure the axial and stable transmission of the loading force to the corresponding sensor to be tested.

[0043] In this embodiment, the two ends of the loading lever 3 are detachably connected with loading weights 12; the corresponding loading force can be controlled by the loading weights, which facilitates the control of the loading force. In order to avoid the impact of the loading lever when it swings, elastic parts can be arranged between the two ends of the loading lever and the bottom of the workbench to reduce the impact.

[0044] In this embodiment, the two ends of the loading lever 3 are connected with connecting rods 18, one of which is vertically connected to one end of the loading lever 3 by a thread, and the other connecting rod can slide vertically through the other end of the loading lever, and the two connecting rods are connected to the two ends of the loading rope 5, and the loading weight is detachably connected to the connecting rods; Figure 3 and Figure 4As shown, the left end of the loading lever is vertically threadedly connected to the corresponding connecting rod, and the right end of the loading lever is vertically slidably penetrated by the corresponding connecting rod, the left connecting rod is fixedly connected to the bottom of the left rope clamp 16, and the right connecting rod is connected to the bottom end of the right loading rope through the right rope clamp. When the lever swings, when the left end of the lever swings down, the left loading rope 5b is pulled downward by the connecting rod at the left end, and the left loading rope axially pulls the loading column 4 together with the right loading rope axially to the left, so that the right loading rope pulls the right connecting rod and the corresponding loading weight upward, and when the left end of the lever swings up, the left end of the lever drives the left loading weight upward through the corresponding connecting rod, and at the same time, the right loading weight pulls the right connecting rod, the right loading rope and the loading column axially to the right; this structure facilitates the detachable installation of the loading weight through the connecting rod 18, and the connecting rod and the loading lever cooperate to provide a stable and reliable installation environment for the weight, and at the same time, the rigid connection between the connecting rod and the loading lever facilitates the driving of the connecting rod.

[0045] In this embodiment, the bottom of the connecting rod is connected to a weight plate with a diameter larger than that of the connecting rod, and one end of the loading lever is provided with a waist hole 3a, and the connecting rod can slide through the waist hole; the weight plate is not shown in the figure, which is a disc-shaped structure coaxially connected to the bottom end of the connecting rod, and this structure is convenient for the installation of standard weights, such as Figure 5 As shown, the waist hole structure facilitates the corresponding lateral movement between the corresponding connecting rod and the loading lever during the swinging process of the loading lever, and can prevent the two connecting rods from interfering with the loading lever during the swinging process of the loading lever.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A fatigue test device for a rotary pressure sensor, characterized in that: It includes a workbench, a force loading device connected to the workbench, several groups of detection components installed on the workbench, and detection sensors installed on the workbench. The ends of adjacent detection components are connected by a steering component to form a rotary detection structure. Each group of detection components includes several sensors to be tested connected end to end. The force loading device is connected to the head of the rotary detection structure for force loading, and the detection sensor is connected to the tail of the rotary detection structure for data detection. The force loading device comprises a loading lever capable of vertical swinging, a driving assembly for driving the loading lever to swing, a loading column with a horizontally arranged axis capable of axial sliding, and a loading rope for driving the loading column to slide axially, wherein the loading rope is connected to the loading column and the two ends of the loading rope are connected to the two ends of the loading lever respectively by passing through a guide device, and the end of the loading column is connected to the head of the rotation detection structure; The steering assembly comprises an equal-arm lever which is horizontally arranged on a workbench and can swing horizontally, and the two ends of the equal-arm lever are respectively rotatably matched with the head and tail of the adjacent transmission assembly; The driving assembly includes a crankshaft rotatably mounted on a workbench, a crank connecting rod rotatably matched with the crankshaft, and a driving member driving the crankshaft to rotate. The other end of the crank connecting rod rotatably matches one end of a loading lever.

2. The fatigue testing device for a rotary pressure sensor according to claim 1, characterized in that: Adjacent sensors to be tested in each group of the detection components, the sensors to be tested and the steering component, and the sensors to be tested and the force loading device are connected via a conductive column, and the conductive column can be axially slidably installed in the linear bearing seat.

3. The fatigue testing device for a rotary pressure sensor according to claim 2, characterized in that: Each of the conductive columns is equipped with an anti-rollover device. At least one end of the conductive column is a plate-like structure. The anti-rollover device includes two sets of anti-rollover bearings rotatably fitted on the workbench. The two sets of anti-rollover bearings are clamped on both sides of the end of the conductive column plate-like structure.

4. The fatigue testing device for a rotary pressure sensor according to claim 1, characterized in that: The loading rope is a segmented structure including a right loading rope and a left loading rope. The right loading rope is wound around the right pulley. One end of the right loading rope is vertically connected to the right end of the lever, and the other end bypasses the right pulley and is horizontally connected to the end of the loading column axially away from the sensor to be tested. The left loading rope includes two ropes respectively wound around two left pulleys. One end of the two left loading ropes is vertically connected to the left rope clamp, the left rope clamp is connected to the left end of the loading lever, and the other end bypasses the left pulley and is horizontally connected to the rope pin. The rope pin is connected to the end of the loading column axially close to the sensor to be tested. The two left loading ropes are arranged on both horizontal sides of the head of the rotation detection structure, and the left and right pulleys rotate and cooperate on the workbench.

5. The fatigue testing device for a rotary pressure sensor according to claim 1, characterized in that: Both ends of the loading lever are detachably connected with loading weights.

6. The fatigue testing device for a rotary pressure sensor according to claim 5, characterized in that: The two ends of the loading lever are connected with connecting rods, one of which is vertically connected to one end of the loading lever by a thread, and the other connecting rod can slide vertically through the other end of the loading lever. The two connecting rods are connected to the two ends of the loading rope, and the loading weights are detachably connected to the connecting rods.

7. The fatigue testing device for a rotary pressure sensor according to claim 6, characterized in that: The bottom of the connecting rod is connected with a weight plate whose diameter is larger than that of the connecting rod. One end of the loading lever is provided with a waist hole, and the connecting rod can slide through the waist hole.

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