CN111024379A - Dynamic performance observation and detection system for linear actuator - Google Patents
Dynamic performance observation and detection system for linear actuator Download PDFInfo
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- CN111024379A CN111024379A CN201911305062.2A CN201911305062A CN111024379A CN 111024379 A CN111024379 A CN 111024379A CN 201911305062 A CN201911305062 A CN 201911305062A CN 111024379 A CN111024379 A CN 111024379A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
Abstract
A linear actuator dynamic performance observation and detection system comprises a linear actuator to be detected, and is characterized in that a ball receiving device is arranged at the front end of the linear actuator to be detected, and a small ball random motion device is arranged above the ball receiving device; the small ball random motion device comprises a vertically placed plate, a height adjusting device is arranged on the plate, a plurality of rows of stop rods are arranged on the plate in a staggered mode, and a sensor for detecting the position of the small ball is further arranged on the plate; the sensor is connected to the control and signal processing unit, the control and signal processing unit is connected with the linear actuator to be detected, the sensor sends the position information of the small ball to the control and signal processing unit, and the control and signal processing unit controls the linear actuator to be detected to push the ball receiving device to be right below the position of the small ball.
Description
Technical Field
The invention relates to the field of mechanical detection, in particular to a system for observing and detecting the dynamic performance of a linear actuator.
Background
In recent years, along with the development of hydraulic technology, computer control, computer algorithm and electronic technology, a plurality of linear actuators with good dynamic responsiveness, high rigidity and compact structure, such as electromechanical actuators and electro-hydrostatic actuators, appear. In many work situations, it is desirable to have not only sufficient force but also sufficient stability and maneuverability of the actuator. The system is designed for this purpose in order to detect the rapidity, accuracy and stability of the actuator.
Disclosure of Invention
The invention adopts the following technical scheme:
a system for observing and detecting the dynamic performance of a linear actuator comprises the linear actuator to be detected, wherein a ball receiving device is arranged at the front end of the linear actuator to be detected, and a small ball random motion device is arranged above the ball receiving device; the small ball random motion device comprises a vertically placed plate, a height adjusting device is arranged on the plate, a plurality of rows of stop rods are arranged on the plate in a staggered mode, and a sensor for detecting the position of the small ball is further arranged on the plate; the sensor is connected to the control and signal processing unit, the control and signal processing unit is connected with the linear actuator to be detected, the sensor sends the position information of the small ball to the control and signal processing unit, and the control and signal processing unit controls the linear actuator to be detected to push the ball receiving device to be right below the position of the small ball.
Furthermore, the sensor is a row of photoelectric sensors and is positioned below a row of stop levers at the lowest part on the board, when the small balls fall to the position of the sensor, the sensor sends position information of the small balls to the control and signal processing unit, and the control and signal processing unit controls the linear actuator to be tested to push the ball receiving device to be positioned right below the position of the small balls.
Furthermore, the sensors are a row of infrared sensors and are positioned on one side of the board, the infrared sensors send the position information of the small balls to the control and signal processing unit, and the control and signal processing unit controls the linear actuator to be tested to push the ball receiving device to be positioned right below the position of the small balls.
Furthermore, the height adjusting device is two height adjusting sleeves respectively fixed on two sides of the plate.
Further, a sensor for measuring the height is mounted on the plate.
Furthermore, the ball receiving device is provided with a light emitting diode, the light emitting diode is connected with an elastic switch, and the small ball falls into the ball receiving device to trigger the elastic switch to light the light emitting diode.
Compared with the prior art, the invention has the following advantages:
simple structure, convenient operation and low cost. The method can not only detect one-dimensional motion in real time, but also be used for other experiments such as two-dimensional motion detection of partial robot actions. And the reaction of the actuator can be detected in real time.
Description of the drawings:
FIG. 1 Structure of example 1
FIG. 2 flow chart of example 1
FIG. 3 Structure of example 2
Figure 4 a flow chart of the operation of embodiment 2.
Detailed description of the preferred embodiments
Example 1
A system for observing the dynamic performance of a linear actuator can detect and observe the motion rapidity, accuracy and stability of the actuator. The system comprises a control and signal processing unit, a correlation type photoelectric sensor, a displacement sensor, a small ball and the like. The test system mainly comprises:
1-transparent plastic baffle: the front and the back are two, and a plurality of stop rods (plastic rods and the like also can be arranged) which are staggered are clamped between the front and the back.
2, sleeve: the device is used for fixing the plastic baffle and the photoelectric sensor, the sleeve is telescopic, the height of the plastic baffle is changed by fixing the bolt, and meanwhile, the height from the correlation type photoelectric sensor to the ball receiving device can be directly read through another displacement sensor, so that the falling distance of a small ball can be directly detected.
4-photoelectric sensor: the device is arranged outside the plastic baffle plate and is used for measuring the position of the small ball and transmitting the position information of the small ball to the processor.
5, a control system: and receiving electric signals transmitted by the photoelectric sensor and the two displacement sensors and sending working signals to the actuator.
6-displacement sensor: the displacement of the hydraulic cylinder is measured and a signal is transmitted to the control system.
7-ball catching device: the ball is in charge of receiving the falling small balls, and when the small balls fall into the ball receiving device, the elastic switch is pressed down by the small balls through gravity, so that the diode is conducted and emits light.
The working principle is as follows:
the experimental pellet is put down from the upper space of the platform device and then randomly falls down after passing through the stop lever in the plastic baffle. When the small ball falls through the photoelectric sensor, the photoelectric sensor can generate a pulse signal to be transmitted to the control system, the control system receives electric signals of the photoelectric sensor and the moving sensor, recognizes the falling position and height of the small ball and detects the horizontal displacement of the ball receiving device at the tail end of the actuator in real time, an instruction is sent to the actuator according to the positions of the small ball and the moving sensor, and the actuator reacts according to the received signal. And the response performance and stability of the actuator are visually observed according to the action speed of the actuator when receiving the small balls. The judgment can also be made according to the displacement data of the ball catching device received by the control system.
The system can vary the height of the plastic apron by adjusting the height of the sleeve, thereby varying the time taken for the pellets to fall.
Example 2:
the embodiment can detect the motion rapidity, accuracy and stability of the actuator in real time. The structure is as shown in fig. 3, compared with embodiment 1, the photoelectric sensors arranged in horizontal rows are set as the infrared sensors 4 arranged vertically, so as to realize real-time tracking of the moving state of the small balls on the board. In addition, a computer is added as an upper computer.
The system can detect the stability and the mobility of the actuator and can also be used for detecting the responsiveness of some two-dimensional motion machines. As shown in fig. 4, the working principle is as follows:
the experimental small balls are put down from the upper space of the platform device and fall down randomly. The distance information measured by the small ball distance sensors is transmitted to the processor and the data after analog-to-digital conversion is transmitted to the computer by the infrared distance measuring sensors, the lower computer processes the small ball position signals and the position signals of the ball receiving device and gives instructions to the actuator, and the actuator starts to work according to the received signals to enable the actuator to timely react. The infrared distance measuring sensor transmits measured distance information of the ball receiving device to the computer through analog-to-digital conversion, the computer simultaneously reproduces the received information in the testing system, a time-displacement coordinate graph of the small ball and the ball receiving device is drawn, and the response speed and the dynamic responsiveness of the actuator are judged by comparing the displacement of the small ball and the displacement of the actuator.
The system can vary the height of the plastic apron by adjusting the height of the sleeve, thereby varying the time taken for the pellets to fall. If the stability of two-dimensional motion actuator needs to be tested, only the x-y time displacement coordinate graph of a small ball needs to be made in a computer, the coordinates of the small ball are converted into electric signals to be transmitted to a processor, the processor gives an instruction to the actuator, the position information of the actuator is collected in real time, and the position information is transmitted to the computer and compared with the coordinates of the small ball.
Claims (6)
1. A linear actuator dynamic performance observation and detection system comprises a linear actuator to be detected, and is characterized in that a ball receiving device is arranged at the front end of the linear actuator to be detected, and a small ball random motion device is arranged above the ball receiving device; the small ball random motion device comprises a vertically placed plate, a height adjusting device is arranged on the plate, a plurality of rows of stop rods are arranged on the plate in a staggered mode, and a sensor for detecting the position of the small ball is further arranged on the plate; the sensor is connected to the control and signal processing unit, the control and signal processing unit is connected with the linear actuator to be detected, the sensor sends the position information of the small ball to the control and signal processing unit, and the control and signal processing unit controls the linear actuator to be detected to push the ball receiving device to be right below the position of the small ball.
2. The system as claimed in claim 1, wherein the sensor is a row of photoelectric sensors, and is located below a row of stop levers at the lowest position on the board, when the ball falls to the position of the sensor, the sensor sends the position information of the ball to the control and signal processing unit, and the control and signal processing unit controls the linear actuator to be tested to push the ball receiving device to a position right below the position of the ball.
3. The system as claimed in claim 1, wherein the sensor is an array of infrared sensors located on one side of the board, the infrared sensors send the position information of the ball to the control and signal processing unit, and the control and signal processing unit controls the linear actuator to be tested to push the ball catching device to a position directly below the position of the ball.
4. The system as claimed in claim 1, wherein the height adjustment means is two height adjustment sleeves fixed to the two sides of the plate.
5. The system as set forth in claim 1, wherein said plate further comprises a height sensor mounted thereon.
6. The system as claimed in claim 1, wherein the ball-catching device is provided with a light emitting diode, the light emitting diode is connected with an elastic switch, and a ball falls into the ball-catching device to trigger the elastic switch to light the light emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911305062.2A CN111024379A (en) | 2019-12-17 | 2019-12-17 | Dynamic performance observation and detection system for linear actuator |
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| CN201911305062.2A CN111024379A (en) | 2019-12-17 | 2019-12-17 | Dynamic performance observation and detection system for linear actuator |
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Application publication date: 20200417 |