Miniature wireless portable mechanical test device

Abstract

The utility model relates to a miniature wireless portable mechanical test device, which belongs to the technical field of mechatronics precision science, is matched with a test workpiece for use, and comprises an actuator, an electric control box, a fixed seat, a clamp and a base, the actuator, the electric control box and the fixed seat are all fixed on the base, the clamp is arranged on one side of the actuator and the fixed seat, and the clamp is arranged on the other side of the actuator and the fixed seat. The electric control box sends instructions to the actuator and receives data information of the actuator, the problems that in the prior art, a mechanical test device is large in size, low in precision, single in function, unable to be remotely controlled and the like are solved, compared with traditional mechanical equipment, the mechanical test device has the advantages of being simple in structure and free of maintenance, and meanwhile the mechanical test device has the advantages of being small in size, light in weight, high in reliability and the like. The system has the advantages of portability, high control precision, low noise, stable work and the like.

Description

Technical Field

[0001] The utility model belongs to the field of mechatronics precision science and technology, in particular to a mechanical testing device, in particular to a miniature wireless portable mechanical testing device. Background Art

[0002] The fatigue phenomenon can be explained as the fracture and damage of materials, parts and components when they are subjected to alternating stress under cyclic loading. When the working stress of the components is far lower than the strength limit of the material, it is necessary to test the mechanical fatigue properties of the material.

[0003] At present, the existing mechanical fatigue testing equipment has the following problems:

[0004] 1. The test accuracy is not high, and regular maintenance and calibration are required to ensure its performance and accuracy. The maintenance and calibration process requires professional technicians and special equipment, which increases maintenance costs;

[0005] 2. Existing material mechanics testing equipment is too large to be carried around;

[0006] 3. The device cannot be remotely controlled and has a single function;

[0007] In order to solve the above problems, it is urgent to invent a miniature wireless portable mechanical testing device to solve the above problems. Utility Model Content

[0008] The utility model discloses a miniature wireless portable mechanical testing device, which realizes remote control of the equipment by setting a WIFI communication module, controls and monitors the operation of the equipment by setting an electric control box, and converts the rotary motion of the miniature servo motor into the linear motion of the push rod through a multi-link group. The device solves the above-mentioned technical problems existing in the prior art.

[0009] The utility model discloses a miniature wireless portable mechanical testing device, which is used in conjunction with a test workpiece and includes: an actuator, an electric control box, a fixing seat, a clamp and a base. The actuator, the electric control box and the fixing seat are all fixed on the base. A clamp is provided on one side of the actuator and the fixing seat. The electric control box sends instructions to the actuator and receives actuator data information.

[0010] Preferably, the actuator includes: a rear shell, a front shell, a micro servo motor, a central control board, a push rod, a force sensor, an optocoupler counter, a multi-link group, an anti-backlash spring and a WIFI communication module. The central control board includes: a servo motor driver and a core control board. The servo motor driver drives and controls the micro servo motor. The micro servo motor is movably connected to the multi-link group of the reduction group. The multi-link group and the push rod are fixed by bolts. An optocoupler counter is provided above the connection between the multi-link group and the push rod. A force sensor is provided at the front end of the push rod. The right side of the force sensor is detachably connected to the clamp. An anti-backlash spring is provided in the middle of the push rod. The WIFI communication module is connected to the central control board through a circuit.

[0011] Preferably, the micro servo motor comprises: a servo motor, an angle encoder and a planetary reducer; the output end of the servo motor is engaged with the planetary reducer, and the planetary reducer is movably connected to the multi-link group.

[0012] Preferably, the rear housing wraps the micro servo motor and the central control board, and the front housing wraps the optocoupler counter, the multi-link group, the anti-backlash spring, the WIFI communication module and the left part of the push rod.

[0013] Preferably, the electric control box includes: a data receiving module, a data sending module, a control chip, a start button and an emergency stop button. The data receiving module receives setting data from the computer or mobile phone, the data receiving module receives feedback data from the WIFI communication module, and the data sending module sends the received data to the WIFI communication module after comparison.

[0014] Beneficial effects

[0015] The utility model realizes remote control of the equipment by setting up a WIFI communication module, controls and supervises the operation of the equipment by setting up an electric control box, converts the rotational motion of the micro servo motor into the linear motion of the push rod through a multi-link group, and records the number of tension and compression cycles in the fatigue test through an optocoupler counter.

[0016] In this utility model patent, the device is mainly used for tensile, compressive and fatigue mechanical tests on small material samples. Compared with traditional mechanical equipment, it has the advantages of simple structure and maintenance-free. The device can be wirelessly controlled through host computer software such as mobile phones or computers, and can edit loading curves to generate them on mobile phones or computers. The device is small in size and light in weight and can be carried around. At the same time, the device is controlled by a micro DC servo motor, which has the advantages of high control accuracy, low noise, and stable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0018] Figure 1 This is a structural diagram of a miniature wireless portable mechanical testing device;

[0019] Figure 2 This is a top view of the miniature wireless portable mechanical testing device;

[0020] Figure 3 This is the main view of the miniature wireless portable mechanical testing device;

[0021] Figure 4 This is a partial planed diagram of a miniature wireless portable mechanical testing device;

[0022] Figure 5 This is a partial planed front view of the miniature wireless portable mechanical testing device;

[0023] Figure 6 This is a partial cross-section diagram of a miniature wireless portable mechanical testing device;

[0024] In the figure: 1. Actuator, 101. Rear housing, 102. Front housing, 103. Micro servo motor, 104. Central control board, 105. Push rod, 106. Force sensor, 107. Optocoupler counter, 108. Multi-link group, 109. Anti-backlash spring, 110. WIFI communication module, 111. Planetary reducer, 2. Electric control box, 201. Start button, 202. Emergency stop button, 3. Fixed seat, 4. Fixture, 5. Base, 6. Test workpiece. DETAILED DESCRIPTION

[0025] The utility model discloses a miniature wireless portable mechanical testing device, comprising: an actuator 1, an electric control box 2, a fixing seat 3, a clamp 4 and a base 5. The actuator 1, the electric control box 2 and the fixing seat 3 are all fixed on the base 5. A clamp 4 is provided on one side of the actuator 1 and the fixing seat 3. The fixing seat 3 fixes the single-sided clamp 4, and the clamp 4 clamps a test workpiece 6. The electric control box 2 sends instructions to the actuator 1 and receives data information from the actuator 1. The electric control box 2 also receives remote task data information.

[0026] In some embodiments, the actuator 1 includes: a rear shell 101, a front shell 102, a micro servo motor 103, a reducer, a central control board 104, a push rod 105, a force sensor 106, an optocoupler counter 107, a multi-link group 108, an anti-backlash spring 109 and a WIFI communication module 110. The central control board 104 receives data information from the electric control box 2. The central control board 104 includes a servo motor driver and a core control board. The servo motor driver drives and controls the micro servo motor 103. The core control board receives the instruction information from the electric control box 2 and sends it to the corresponding module. The micro servo motor 103 is movably connected to the multi-link group 108 to drive the multi-link group 108 to move. The multi-link group 108 and the push rod 105 is fixed by bolts, and the multi-link group 108 drives the push rod 105 to move back and forth. The multi-link group 108 converts the rotational motion into linear motion. An optocoupler counter 107 is provided above the connection between the multi-link group 108 and the push rod 105, which is responsible for recording the number of tension and compression cycles. A force sensor 106 is provided at the front end of the push rod 105 to monitor the tension and pressure of the sample in real time. The force sensor 106 is detachably connected to the clamp 4. An anti-backlash spring 109 is provided in the middle of the push rod 105. The WIFI communication module 110 is electrically connected to the central control board 104. The WIFI communication module 110 is wirelessly connected to the mobile phone or computer. The WIFI communication module 110 receives and transmits data information to the electronic control box 2.

[0027] In some embodiments, the micro servo motor 103 includes: a servo motor, an angle encoder and a planetary reducer 111. The angle encoder records the angle signal of the servo motor. The output end of the servo motor is connected to the planetary reducer 111, and the planetary reducer 111 is movably connected to the multi-link group 108.

[0028] In some embodiments, the rear shell 101 wraps the micro servo motor 103 and the central control board 104, and the front shell 102 wraps the optocoupler counter 107, the multi-link group 108, the anti-backlash spring 109, the WIFI communication module 110 and the left part of the push rod 105. The rear shell 101 and the front shell 102 protect the device and protect the device from rain, smoke and dust.

[0029] In some embodiments, the electric control box 2 includes: a data receiving module, a data sending module, a control chip, a start button 201 and an emergency stop button 202. The data receiving module receives setting data from the computer or mobile phone, the data receiving module receives feedback data from the WIFI communication module 110, the data sending module sends the received data to the WIFI communication module 110 after comparison, and the WIFI communication module 110 synchronizes the information to the central control board 104. The electric control box 2 sends instructions to the central control board 104 through the control chip, and collects the servo motor encoder position signal and the force value signal of the force sensor 106 in real time to form a closed-loop control.

[0030] In some embodiments, the device is used to perform tensile, compressive, and fatigue mechanical tests on small material samples. The maximum loading force is ±200N, the maximum loading displacement range is ±20mm, the maximum linear speed is ≤50mm / s, the fatigue loading frequency is 20Hz, and the amplitude is ±5mm. It can perform uniaxial tension, compression, cyclic loading, and load holding functions under force control and displacement control conditions.

[0031] In some embodiments, the device is 280 mm long, 120 mm wide, and 77 mm high, and weighs less than or equal to 1.5 kg. The device is small enough to be carried around.

[0032] In some embodiments, when the device encounters an emergency and needs to be stopped, pressing the emergency stop button 202 stops the device.

[0033] Example 1

[0034] In a specific embodiment provided by the present invention, Figure 2 As shown, the test workpiece 6 is fixed to the fixture 4 by screws.

[0035] The actuator 1 is connected to the electric control box 2 via a cable, and the electric control box 2 is connected to a 220V power supply. Press the start button 201 to power on the device, connect the device to a mobile phone or computer via the WIFI communication module 110, set the loading parameters on the mobile phone or computer, and then conduct the test.

[0036] When the data receiving module of the electric control box 2 receives the control instruction, the control chip in the electric control box 2 performs calculations and sends the control data to the WIFI communication module 110 through the data sending module. The WIFI communication module 110 transmits the data to the servo motor control board, and receives the angle signal sent back by the motor end encoder in real time, receives the force value signal from the force sensor 106 in real time, and performs PID control through the central control board 104 to form a servo closed-loop control.

[0037] Force control: When the applied force reaches the specified force, the servo motor will hold the load for a time determined by the set parameters;

[0038] During position control: the front and rear displacement of the push rod 105 is converted into an angle code through the angle encoder. When the specified displacement is reached, the servo motor is loaded and maintained;

[0039] During fatigue loading: After setting the applied force value, the servo motor performs forward and reverse reciprocating motion. When the applied force reaches the specified force value, the servo motor reverses and unloads to the specified force value, then rotates forward and loads to the specified force value. This process is repeated to perform cyclic fatigue loading on the sample.

Claims

1. A miniature wireless portable mechanical testing device, used in conjunction with a test workpiece, comprising: An actuator, an electric control box, a fixing seat, a clamp, and a base, wherein the actuator, the electric control box, and the fixing seat are all fixed to the base, a clamp is provided on one side of the actuator and the fixing seat, and the electric control box issues commands to the actuator and receives data information from the actuator; The actuator includes: a rear shell, a front shell, a micro servo motor, a central control panel, a push rod, a force sensor, an optocoupler counter, a multi-link group, an anti-backlash spring and a WIFI communication module. The central control panel includes: a servo motor driver and a core control panel. The servo motor driver drives and controls the micro servo motor. The micro servo motor is movably connected to the multi-link group of the reduction group. The multi-link group and the push rod are fixed by bolts. An optocoupler counter is provided above the connection between the multi-link group and the push rod. A force sensor is provided at the front end of the push rod. The right side of the force sensor is detachably connected to the clamp. An anti-backlash spring is provided in the middle of the push rod. The WIFI communication module is connected to the central control panel through a circuit.

2. A miniature wireless portable mechanical testing device according to claim 1, characterized in that: The micro servo motor comprises a servo motor, an angle encoder and a planetary reducer. The output end of the servo motor is connected to the planetary reducer, and the planetary reducer is movably connected to the multi-link group.

3. The miniature wireless portable mechanical testing device according to claim 1, characterized in that: The rear shell wraps the micro servo motor and the central control board, and the front shell wraps the optocoupler counter, the multi-link group, the anti-backlash spring, the WIFI communication module and the left part of the push rod.

4. The miniature wireless portable mechanical testing device according to claim 1, characterized in that: The electric control box includes: a data receiving module, a data sending module, a control chip, a start button and an emergency stop button. The data receiving module receives setting data from a computer or mobile phone, the data receiving module receives feedback data from a WIFI communication module, and the data sending module sends the received data to the WIFI communication module after comparison.

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