High-speed releaser of acting force

Abstract

The present invention relates to a high-speed releaser for acting force, which comprises a releaser body, a motion cylinder and a cover plate. A combustion chamber is arranged inside one end of the releaser body, and a motion cylinder is arranged inside the other end. A piston is installed inside the motion cylinder, and the piston rod of the piston extends out of the right end face of the releaser body. The rear end of the combustion chamber is sealed by the cover plate fixed on the end face of the releaser body. The front end of the combustion chamber communicates with the rear chamber of the motion cylinder. Explosives are placed inside the combustion chamber and connected with a fuse. The high-speed releaser for acting force of the present invention is mainly an excitation source for rapidly exciting the dynamic test of a force sensor, which can greatly improve the test efficiency and ensure the accuracy and reliability of the data tested by the dynamic force value sensor.

Description

Technical Field

[0001] The present invention relates to a high-speed releaser for acting force, and particularly to an excitation device for step-type dynamic force value measurement of a force sensor. Background Art

[0002] Dynamic force is a force that changes with time. Usually, various force sensors need to measure dynamic force to confirm the measurement error during dynamic use. The most important part of the calibration test of dynamic force is how to generate the excitation of dynamic force. At present, for the vast majority of force sensors, only static calibration measurement is carried out, but they are used in dynamic occasions. This calibration measurement method of "using static instead of dynamic" results in very low accuracy of dynamic force measurement (sometimes the measurement error even reaches several times the actual force value). In order to be able to carry out the calibration test of dynamic force, there must be an excitation method that can generate dynamic force. Usually, brittle material fracture, instantaneous glass breakage, sinusoidal rotation excitation, impact, etc. are used to generate the excitation of force. Therefore, a high-speed releaser for acting force with simple structure, fast excitation speed, simple operation, reusable, and low cost is needed. Summary of the Invention

[0003] The present invention aims to provide a high-speed releaser for acting force, which has a simple structure, fast excitation speed, simple operation, reusable, and low cost, and uses the excitation of dynamic step force signal, so as to carry out the calibration test work of dynamic force and solve the calibration test problem of "using static instead of dynamic" of the force sensor.

[0004] To achieve the design purpose of the above high-speed releaser, the technical solution of the present invention is: a high-speed releaser for acting force, which has a releaser body, a motion cylinder, and a cover plate. One end of the releaser body is internally provided with a combustion chamber, and the other end is internally provided with a motion cylinder. A piston is installed in the motion cylinder, and the piston rod of the piston extends out of the right end face of the releaser body. The rear end of the combustion chamber is sealed by a cover plate fixed on the end face of the releaser body. The front end of the combustion chamber is communicated with the rear chamber of the motion cylinder. Explosive is placed in the combustion chamber and connected with a fuse.

[0005] Further, a force sensor is in contact connection on the piston rod and the force applied on the force sensor.

[0006] Further, the force sensor is connected to a data processor, and the data processor calculates the dynamic data of the force sensor to complete the dynamic performance test work of the force sensor.

[0007] Furthermore, the explosive is controlled by a fuse. When the fuse is powered on and closed, the explosive detonates instantaneously. The combustion during the explosion instantaneously generates a huge negative pressure in the combustion chamber, causing the piston to contract rapidly, and thus quickly separating the piston rod from the force sensor and the force F applied to the force sensor. That is, the force F applied to the force sensor is instantaneously released to the zero-load state, achieving the effect of high-speed release of the acting force.

[0008] Furthermore, when the piston rod quickly separates from the force sensor, the force sensor generates a dynamic step excitation signal, thereby measuring the dynamic data of the force sensor.

[0009] Furthermore, after the force sensor establishes a force loading experimental environment, the high-speed release device releases the force at a high speed, and the release time ≤ 0.5 ms.

[0010] The beneficial effects of the present invention are as follows:

[0011] 1. The high-speed release device for the acting force of the present invention can cause the piston rod to contract instantaneously, quickly separating the force F thereon.

[0012] 2. The high-speed release device for the acting force of the present invention causes the force sensor to generate an instantaneous step method excitation, and finally high-accuracy dynamic force calibration test data can be obtained.

[0013] 3. The system of the present invention has a simple structure, a fast excitation speed, is easy to operate, can be reused, and has a low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the high-speed release device for the acting force of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0015] The present invention will be further described below in conjunction with the drawings and implementation cases.

[0016] As Figure 1 shown, the high-speed release device for the acting force of the present invention includes a piston 6, a motion cylinder 5, a combustion chamber 4, a chemical explosive 3, a cover plate 2, a fuse 1, etc. One end of the release device body is internally provided with a combustion chamber 4, and the other end is internally provided with a motion cylinder 5. A piston 6 is installed in the motion cylinder 5, and the piston rod of the piston 6 extends out of the right end face of the release device body. The rear end of the combustion chamber 4 is sealed by a cover plate 2 fixed on the end face of the release device body. The front end of the combustion chamber 4 is communicated with the rear chamber of the motion cylinder 5. A chemical explosive 3 is placed in the combustion chamber 4 and connected to a fuse 1.

[0017] The piston rod is in contact connection with a force sensor and the force F applied to the force sensor. The force sensor is connected to a data processor, and the data processor calculates the dynamic data of the force sensor to complete the dynamic performance test work of the force sensor.

[0018] To achieve the effect of instant detachment of force F and generate a dynamic step force signal, the sealed cavity of the combustion chamber designed in the present invention contains explosives. By applying the huge negative pressure generated during the ignition and combustion of the explosives, the piston rod instantaneously contracts, causing the force F of the sensor to instantaneously drop to zero load. In this way, stepwise dynamic calibration measurement of this force sensor can be carried out.

[0019] The explosives are controlled by a fuse. When the fuse is powered on and closed, the explosives instantaneously explode. The instantaneous combustion during the explosion rapidly generates a huge negative pressure inside the combustion chamber, causing the piston to rapidly contract. In this way, when the piston rapidly contracts, the force related to the piston body rapidly detaches, that is, the related force instantaneously releases from the state of force F to the zero load state, achieving the effect of high-speed release of the acting force.

[0020] The high-speed release device for the acting force of the present invention is used to generate a dynamic step excitation signal for a force sensor in a stressed state by instantaneously releasing the force, thereby measuring the dynamic data of the force sensor. The function of the high-speed release device is to rapidly release the force (the release time is better than 0.5 ms) after the force sensor has established a force loading experimental environment. Such a high-speed release device truly restores the dynamic performance of the force sensor and provides a high-quality and efficient excitation source for the dynamic test of the force sensor.

[0021] In the high-speed release device for the acting force of the present invention, at the start of the test, the chemical explosives inside the high-speed release device instantaneously explode, causing the piston to contract. The force sensor on the piston generates a step dynamic signal under the action of force F. Then, through data acquisition and analysis software, the dynamic data of the force sensor is calculated, completing the dynamic performance test work of the force sensor.

[0022] When performing a dynamic test on a force sensor, as shown in Figure 1 First, support the force torque sensor on the top of the piston of the high-speed release device and apply the corresponding force F. At the start of the test, the fuse of the chemical explosives inside the high-speed release device closes, causing the explosives to instantaneously explode. The explosion combustion rapidly generates a huge negative pressure inside the combustion chamber, causing the piston to rapidly contract. This rapid contraction motion instantaneously releases the force F on the force sensor, that is, generates a step dynamic signal. Then, through data acquisition and analysis software, the dynamic data of the force sensor is calculated, completing the dynamic performance test work of the force sensor.

[0023] The high-speed release device for the acting force of the present invention is mainly an excitation source for rapidly exciting the dynamic test of the force sensor, which can greatly improve the test efficiency and ensure the accuracy and reliability of the data measured by the dynamic force value sensor.

Claims

1. A high-speed releaser for a force, comprising a releaser body, a moving cylinder, and a cover plate, characterized in that: One end of the release body is provided with a combustion chamber inside, and the other end is provided with a motion cylinder inside. A piston is installed in the motion cylinder, and the piston rod of the piston extends out of the right end face of the release body. The rear end of the combustion chamber is sealed with a cover plate fixed on the end face of the release body. The front end of the combustion chamber is communicated with the rear chamber of the motion cylinder. Explosives are placed in the combustion chamber and connected to a fuse. A force sensor is in contact connection on the piston rod and the force applied to the force sensor. The explosives are controlled by the fuse. When the fuse is powered on and closed, the explosives explode instantaneously. The explosion instantaneously burns, causing a huge negative pressure to be rapidly generated in the combustion chamber, extremely quickly causing the piston to perform a contraction motion, thereby causing the piston rod to quickly disengage from the force sensor and the force applied to the force sensor, that is, the force F applied to the force sensor is instantaneously released to a zero-load state, achieving the effect of high-speed release of the acting force. The high-speed release device of the acting force causes the force sensor to generate an instantaneous step method excitation, and finally high-accuracy dynamic force calibration test data is obtained.

2. The high-speed releaser of the acting force according to claim 1, characterized in that: The force sensor is connected to a data processor, and the data processor calculates the dynamic data of the force sensor to complete the dynamic performance test work of the force sensor.

3. The high-speed releaser of the acting force according to claim 1, characterized in that: After the high-speed release device establishes a force loading experimental environment on the force sensor, it performs a high-speed release of the force, and the release time ≤ 0.5 ms.

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