CN108627388B - Method for measuring instantaneous impact force - Google Patents
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- CN108627388B CN108627388B CN201810377692.XA CN201810377692A CN108627388B CN 108627388 B CN108627388 B CN 108627388B CN 201810377692 A CN201810377692 A CN 201810377692A CN 108627388 B CN108627388 B CN 108627388B
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- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
- G01N3/303—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight generated only by free-falling weight
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Abstract
The invention relates to a method for measuring instantaneous impact force, which comprises the following steps: step 1), applying pressure to an impact sample on an electronic universal testing machine, reading a strain voltage value N of the impact sample, and obtaining a relation formula (1) between the strain voltage value and an applied force value; step 2), preparing an acceleration measuring device; placing an impact sample in the middle of a clamp, installing a resistance strain gauge on the impact sample, enabling a pendulum bob to fall down to impact the impact sample, forming an acceleration voltage value oscillogram and a strain voltage value oscillogram on a computer, reading peak values in the velocity voltage value oscillogram and the strain voltage value oscillogram, and obtaining a relation formula (2) between the acceleration voltage value and the strain voltage value; and step 3), substituting the formula (2) into the formula (1) to obtain the relation between the impact force and the acceleration, thereby realizing the measurement of the instantaneous impact force. By the invention, direct touch between the impact sample and the acceleration sensor is avoided, and the acceleration sensor cannot be damaged.
Description
Technical Field
The invention relates to a method for measuring instantaneous impact force, and belongs to the technical field of impact force testing.
Background
In experiments and engineering, experiments such as collision, explosion, free falling motion of objects and the like need to be carried out in many cases, and the capacity of resisting impact load of a material is often required to be measured by measuring some instantaneous impact force, wherein the impact force belongs to dynamic force. The impact moment has short contact time, so that the size and the load spectrum of the instantaneous impact force must be accurately measured in order to improve the reliability of the measurement result. The method is generally realized by a piezoelectric quartz force sensor, a charge amplifier and a multifunctional digital fluorescent oscilloscope. When the impact load is measured, the piezoelectric sensor is placed on the workbench, the punch head can generate induced charges when impacting the sensor, the charges are amplified by the charge amplifier and then sent to the oscilloscope, so that the impact load waveform can be displayed on the oscilloscope screen, and the impact load waveform can be guided into a computer for further analysis.
When measuring the instantaneous impact force, it is common that the punch directly impacts the piezoelectric quartz force sensor, thereby obtaining data. However, in practical tests, it was found that the instantaneous impact force measured in this way has disadvantages: the lower end plane of the punch directly collides with the sensor, force transmission is uneven, and experimental data are influenced; when the instantaneous impact force is large, the working surface of the sensor can be damaged by the direct collision of the punch and the sensor, and error data can be obtained. In view of the above, there is a need to design a new device for measuring instantaneous impact force, so as to improve the accuracy of the measured data.
Disclosure of Invention
The invention aims to overcome the defects and develop a method for measuring instantaneous impact force.
The invention aims to realize the method for measuring the instantaneous impact force, which is characterized by comprising the following steps:
step 1), preparing an impact sample, mounting the impact sample on an electronic universal testing machine, and mounting a resistance strain gauge on the impact sample, wherein the resistance strain gauge is sequentially connected with an electric bridge box, a strain amplifier, a data acquisition unit and a computer provided with a CRAS V7.0 vibration and dynamic signal acquisition and analysis system through a lead;
applying pressure to an impact sample on an electronic universal testing machine, converting a signal acquired by a resistance strain gauge on the impact sample into a voltage signal through a bridge box, amplifying the voltage signal by a strain amplifier, acquiring the voltage signal by a data acquisition unit, displaying a strain voltage value on a computer provided with a CRAS V7.0 vibration and dynamic signal acquisition and analysis system, and respectively reading the strain voltage value N of the impact sample under the pressures of 400N, 800N, 1200N and 1600N on the computer to obtain the relation between the strain voltage value and an applied force value:
f =4.38356 ☓ strain voltage value N (1);
step 2), preparing an acceleration measuring device; the acceleration measuring device comprises an instrument panel, a machine body, a lock catch rod, a pendulum rod acceleration sensor, a clamp and a base, wherein the machine body and the clamp are fixed on the base, the clamp is arranged in front of the machine body, and an impact sample is arranged in the middle of the clamp; the top of the machine body is provided with a machine body shaft, a lock catch rod, a pendulum rod and an instrument panel are sequentially nested on the machine body shaft at the top of the machine body, the instrument panel is fixed on the machine body shaft, the lock catch rod can rotate and be fixed on the machine body shaft, the pendulum rod is sleeved on the machine body shaft, and the pendulum rod can rotate around the machine body shaft; one end of the lock catch rod is fixed on the machine body shaft, and the other end of the lock catch rod is provided with a lock catch; one end of the pendulum rod is connected with the machine body shaft, the other end of the pendulum rod is provided with a pendulum, an acceleration sensor is adsorbed in the middle of the pendulum, and the pendulum can be clamped on the lock catch, so that the pendulum has downward potential energy; when the lock catch is opened, the pendulum rod rotates around the machine body shaft at the top of the machine body and falls down, the pendulum on the pendulum rod just hits the center position of an impact sample, the acceleration sensor acquires acceleration data, and the acceleration sensor is connected with a computer provided with a CRAS V7.0 vibration and dynamic signal acquisition and analysis system; when in use, the method comprises the following steps:
a. before measurement, a shock sample which is the same as the shock sample in the step 1) is taken again and placed in the middle of the clamp, a resistance strain gauge is installed on the shock sample, and the resistance strain gauge is sequentially connected with a bridge box, a strain amplifier, a data acquisition unit and a computer provided with a CRAS V7.0 vibration and dynamic signal acquisition and analysis system through a lead;
b. the lock catch rod is swung to the required height and fixed on a machine body shaft of the machine body, the pendulum bob on the pendulum bob rod is arranged in the lock catch and is buckled through the lock catch, and then the pendulum bob has downward potential energy; the lock catch is opened, the pendulum bob falls down to impact the impact sample, and the acceleration voltage value acquired by the acceleration sensor is displayed on a computer; when the pendulum bob falls down and does not break the impact sample, continuing the step c; when the pendulum bob 9 falls down to impact the impact sample 7, finishing acceleration measurement;
c. then the lock catch rod is swung to be higher than the previous height and fixed on a machine body shaft of the machine body, and the pendulum bob on the pendulum bob rod is arranged in the lock catch and is buckled through the lock catch, so that the pendulum bob has downward potential energy; the lock catch is opened, the pendulum bob falls down to impact the impact sample, and the acceleration voltage value acquired by the acceleration sensor is displayed on a computer; when the pendulum bob falls down and does not break the impact sample, continuing the step d; when the pendulum bob 9 falls down to impact the impact sample 7, finishing acceleration measurement;
d. repeating the step c until the pendulum breaks the impact sample, and ending the acceleration measurement;
the acceleration sensor displays the acceleration voltage value acquired each time on a computer to form an acceleration voltage value oscillogram; when the pendulum bob impacts an impact sample each time, signals collected by a resistance strain gauge on the impact sample are converted into voltage signals through the bridge box, the voltage signals are collected by the data collector after being amplified by the strain amplifier, and finally, a strain voltage value is displayed on a computer provided with a CRAS V7.0 vibration and dynamic signal collection and analysis system to form a strain voltage value oscillogram;
and finally, forming an acceleration voltage value oscillogram and a strain voltage value oscillogram on a computer, and reading peak values in the speed voltage value oscillogram and the strain voltage value oscillogram to obtain the relation between the acceleration voltage value and the strain voltage value:
acceleration voltage value = strain voltage value ☓ 2.1382 (2);
and step 3), substituting the formula (2) into the formula (1) to obtain the relation between the impact force and the acceleration as follows:
f = acceleration voltage value ☓ 4.38356/2.1382=2.05 ☓ acceleration voltage value N, thereby enabling measurement of the instantaneous impact force.
In the step 2), the height of the machine body can be adjusted, the machine body comprises an upper machine body and a lower machine body, a machine body shaft is arranged at the top of the upper machine body, the lower machine body is fixed on the base, the upper machine body is sleeved in the lower machine body, and the height of the machine body is adjusted by adjusting the position of the upper machine body in the lower machine body; first screws penetrate through the side walls of the upper machine body and the lower machine body, and the upper machine body and the lower machine body are fixed through the first screws, so that the machine body is fixed after being adjusted in height.
In the step 2), the length of the pendulum rod can be adjusted, the pendulum rod comprises a first pendulum rod and a second pendulum rod, one end of the first pendulum rod is nested on a machine body shaft at the top of the machine body, and the pendulum is arranged on the second pendulum rod; one end of the first pendulum rod can rotate around the machine body shaft, the other end of the first pendulum rod is sleeved in the second pendulum rod, and the length of the pendulum rod is adjusted by adjusting the position of the first pendulum rod in the second pendulum rod; and second screws penetrate through the side walls of the first pendulum rod and the second pendulum rod, and the first pendulum rod and the second pendulum rod are fixed through the second screws, so that the pendulum rods are fixed after the length is adjusted.
In the step 2), the clamp and the base are detachably and replaceably fixedly connected.
The model of the electronic universal testing machine is DNS 100.
The model of the bridge box is KD 7901.
The model of the strain amplifier is KD 6005.
The model of the data collector is AZ 308.
The type of the resistance strain gauge is Br120-2 AA.
The invention has the advantages of reasonable and simple structure, easy production and manufacture and convenient use, and the method for measuring the instantaneous impact force comprises an acceleration measuring device, wherein the acceleration measuring device comprises a base, a machine body, a pendulum bob, a clamp, a lock catch, an instrument panel and an acceleration sensor, and the acceleration sensor is adsorbed at the central position of the pendulum bob. Before measurement, the pendulum bob is swung to a certain height and fixed by the lock catch, so that the pendulum bob has certain potential energy; during measurement, the pendulum bob suddenly drops to break the sample, signals collected by the acceleration sensor are converted into voltage signals through the charge amplifier, then the voltage signals are collected by the data collection system, and finally an acceleration signal oscillogram is formed on the computer. The acceleration sensor measures the instantaneous impact force without any damage to the instantaneous impact force during measurement, and can detect and reflect the magnitude of the acceleration in real time. The pendulum bob and the machine body are both telescopic, and the heights of the pendulum bob and the machine body are adjusted through screws. The lock catch can fix the pendulum bob at different heights, so that the pendulum bob has different potential energy to impact test samples with different materials and shapes. The clamp can be replaced, and different clamps are used for samples with different shapes.
Compared with the existing instantaneous impact force testing method, the device has the advantages and effects that the device is simple in structure and easy to operate, the direct contact between the impact sample and the acceleration sensor is avoided, the acceleration sensor cannot be damaged, and the defects that the existing instantaneous impact force testing device is low in experimental data accuracy and high in price are overcome.
Drawings
FIG. 1 is a schematic view of the structural principle of the present invention;
FIG. 2 is a schematic diagram of acceleration signal acquisition;
fig. 3 is a schematic diagram of signal acquisition of a resistance strain gauge.
In the figure: the device comprises an instrument panel 1, a machine body 2, a lock catch rod 3, a pendulum rod 4, an acceleration sensor 5, a clamp 6, an impact sample 7, a base 8, a pendulum bob 9 and a lock catch 10.
Detailed Description
The invention is further described with reference to the accompanying drawings and the description thereof.
A method of measuring an instantaneous impact force, comprising the steps of:
step 1), preparing an impact sample 7, installing the impact sample 7 on an electronic universal testing machine, and installing a resistance strain gauge on the impact sample 7, wherein the resistance strain gauge is sequentially connected with an electric bridge box, a strain amplifier, a data acquisition unit and a computer provided with a CRAS V7.0 vibration and dynamic signal acquisition and analysis system through a lead;
applying pressure to an impact sample 7 on an electronic universal testing machine, converting a signal acquired by a resistance strain gauge on the impact sample 7 into a voltage signal through a bridge box, amplifying the voltage signal by a strain amplifier, acquiring the voltage signal by a data acquisition unit, finally displaying a strain voltage value on a computer provided with a CRAS V7.0 vibration and dynamic signal acquisition and analysis system, and respectively reading the strain voltage value N of the impact sample 7 under the pressure of 400N, 800N, 1200N and 1600N on the computer to obtain the relation between the strain voltage value and an applied force value:
f =4.38356 ☓ strain voltage value N (1);
step 2), preparing an acceleration measuring device; the acceleration measuring device comprises an instrument panel 1, a machine body 2, a lock catch rod 3, a pendulum rod 4, an acceleration sensor 5, a clamp 6 and a base 8, wherein the machine body 2 and the clamp 6 are fixed on the base 8, the clamp 6 is arranged in front of the machine body 2, and an impact sample 7 is arranged in the middle of the clamp 6; the top of the machine body 2 is provided with a machine body shaft, a lock catch rod 3, a pendulum rod 4 and an instrument panel 1 are sequentially nested on the machine body shaft at the top of the machine body 2, the instrument panel 1 is fixed on the machine body shaft, the lock catch rod 3 can rotate and be fixed on the machine body shaft, the pendulum rod 4 is sleeved on the machine body shaft, and the pendulum rod 4 can rotate around the machine body shaft; one end of the lock catch rod 3 is fixed on the machine body shaft, and the other end is provided with a lock catch 10; one end of the pendulum rod 4 is connected with the machine body shaft, the other end of the pendulum rod is provided with a pendulum 9, an acceleration sensor 5 is adsorbed in the middle of the pendulum 9, and the pendulum 9 can be clamped on the lock catch 10 to enable the pendulum 9 to have downward potential energy; when the lock catch 10 is opened, the pendulum rod 4 rotates around a machine body shaft at the top of the machine body 2 to fall, the pendulum 9 on the pendulum rod 4 just hits the center position of the impact sample 7, the acceleration sensor 5 acquires acceleration data, the acceleration sensor is sequentially connected with a charge amplifier, a data acquisition system and a computer provided with a CRAS V7.0 vibration and dynamic signal acquisition and analysis system, signals acquired by the acceleration sensor are converted into voltage signals through the charge amplifier, then are acquired by the data acquisition system, and finally an acceleration signal waveform diagram is formed on the computer; when in use, the method comprises the following steps:
a. before measurement, placing an impact sample 7 which is the same as the impact sample 7 in the step 1) in the middle of the clamp 6, and installing a resistance strain gauge on the impact sample 7, wherein the resistance strain gauge is sequentially connected with a bridge box, a strain amplifier, a data acquisition unit and a computer provided with a CRAS V7.0 vibration and dynamic signal acquisition and analysis system through leads;
b. the lock catch rod 3 is swung up to the required height and fixed on the machine body shaft of the machine body 2, the pendulum bob 9 on the pendulum bob rod 4 is arranged in the lock catch 10 and is buckled through the lock catch 10, and then the pendulum bob 9 has downward potential energy; the lock catch 10 is opened, the pendulum bob 9 falls down to impact the impact sample 7, and the acceleration voltage value acquired by the acceleration sensor is displayed on a computer; when the pendulum bob 9 falls down and does not break the impact sample 7, continuing the step c; when the pendulum bob 9 falls down to impact the impact sample 7, finishing acceleration measurement;
c. then the lock catch rod 3 is swung to be higher than the previous height and fixed on the machine body shaft of the machine body 2, the pendulum bob 9 on the pendulum bob rod 4 is arranged in the lock catch 10 and is buckled through the lock catch 10, and then the pendulum bob 9 has downward potential energy; the lock catch 10 is opened, the pendulum bob 9 falls down to impact the impact sample 7, and the acceleration voltage value acquired by the acceleration sensor is displayed on a computer; when the pendulum bob 9 falls down and does not break the impact sample 7, continuing the step d; when the pendulum bob 9 falls down to impact the impact sample 7, finishing acceleration measurement;
d. repeating the step c until the pendulum bob 9 breaks the impact sample 7, and finishing acceleration measurement;
the acceleration sensor displays the acceleration voltage value acquired each time on a computer to form an acceleration voltage value oscillogram; when the pendulum bob 9 impacts the impact sample 7 each time, signals collected by the resistance strain gauges on the impact sample 7 are converted into voltage signals through the bridge box, the voltage signals are collected by the data collector after being amplified by the strain amplifier, and finally, the strain voltage value is displayed on a computer provided with a CRAS V7.0 vibration and dynamic signal collection and analysis system to form a strain voltage value oscillogram;
and finally, forming an acceleration voltage value oscillogram and a strain voltage value oscillogram on a computer, and reading peak values in the speed voltage value oscillogram and the strain voltage value oscillogram to obtain the relation between the acceleration voltage value and the strain voltage value:
acceleration voltage value = strain voltage value ☓ 2.1382 (2);
and step 3), substituting the formula (2) into the formula (1) to obtain the relation between the impact force and the acceleration as follows:
f = acceleration voltage value ☓ 4.38356/2.1382=2.05 ☓ acceleration voltage value N, thereby enabling measurement of the instantaneous impact force.
Further, in the step 2), the height of the machine body 2 can be adjusted, the machine body 2 comprises an upper machine body and a lower machine body, a machine body shaft is arranged at the top of the upper machine body, the lower machine body is fixed on the base 8, the upper machine body is sleeved in the lower machine body, and the height of the machine body 2 is adjusted by adjusting the position of the upper machine body in the lower machine body; first screws penetrate through the side walls of the upper machine body and the lower machine body, and the upper machine body and the lower machine body are fixed through the first screws, so that the machine body 2 is fixed after being adjusted in height.
In the step 2), the length of the pendulum rod 4 can be adjusted, the pendulum rod 4 comprises a first pendulum rod and a second pendulum rod, one end of the first pendulum rod is nested on a machine body shaft at the top of the machine body 2, and the pendulum 9 is arranged on the second pendulum rod; one end of the first pendulum rod can rotate around the machine body shaft, the other end of the first pendulum rod is sleeved in the second pendulum rod, and the length of the pendulum rod 4 can be adjusted by adjusting the position of the first pendulum rod in the second pendulum rod; and second screws penetrate through the side walls of the first pendulum rod and the second pendulum rod, and the first pendulum rod and the second pendulum rod are fixed through the second screws, so that the length of the pendulum rod 4 is adjusted and then the pendulum rod is fixed. The clamp 6 is detachably and replaceably fixedly connected with the base 8.
Further, impact specimen 7 was a Q235 steel impact specimen having a length of 55mm and a height of 10 mm; the model of the electronic universal tester is DNS100, the model of the bridge box is KD7901, the model of the strain amplifier is KD6005, the model of the data collector is AZ308, and the model of the resistance strain gauge is Br120-2 AA.
Claims (7)
1. A method for measuring instantaneous impact force is characterized by comprising the following steps:
step 1), preparing an impact sample (7), installing the impact sample (7) on an electronic universal testing machine, and installing a resistance strain gauge on the impact sample (7), wherein the resistance strain gauge is sequentially connected with a bridge box, a strain amplifier, a data acquisition unit and a computer provided with a CRAS V7.0 vibration and dynamic signal acquisition and analysis system through a lead;
applying pressure to an impact sample (7) on an electronic universal testing machine, converting a signal acquired by a resistance strain gauge on the impact sample (7) into a voltage signal through a bridge box, amplifying the voltage signal by a strain amplifier, acquiring the voltage signal by a data acquisition unit, finally displaying a strain voltage value on a computer provided with a CRAS V7.0 vibration and dynamic signal acquisition and analysis system, and respectively reading the strain voltage value N of the impact sample (7) under the pressures of 400N, 800N, 1200N and 1600N on the computer to obtain the relation between the strain voltage value and an applied force value:
f =4.38356 ☓ strain voltage value N (1);
step 2), preparing an acceleration measuring device; the acceleration measuring device comprises an instrument panel (1), a machine body (2), a lock catch rod (3), a pendulum rod (4), an acceleration sensor (5), a clamp (6) and a base (8), wherein the machine body (2) and the clamp (6) are fixed on the base (8), the clamp (6) is arranged in front of the machine body (2), and an impact sample (7) is arranged in the middle of the clamp (6); the top of the machine body (2) is provided with a machine body shaft, the lock catch rod (3), the pendulum rod (4) and the instrument panel (1) are sequentially nested on the machine body shaft at the top of the machine body (2), the instrument panel (1) is fixed on the machine body shaft, the lock catch rod (3) can rotate and be fixed on the machine body shaft, the pendulum rod (4) is sleeved on the machine body shaft, and the pendulum rod (4) can rotate around the machine body shaft; one end of the lock catch rod (3) is fixed on the machine body shaft, and the other end of the lock catch rod is provided with a lock catch (10); one end of the pendulum rod (4) is connected with the machine body shaft, the other end of the pendulum rod is provided with a pendulum (9), an acceleration sensor (5) is adsorbed in the middle of the pendulum (9), and the pendulum (9) can be clamped on the lock catch (10) to enable the pendulum (9) to have downward potential energy; when the lock catch (10) is opened, the pendulum rod (4) rotates around a machine body shaft at the top of the machine body (2) to fall, a pendulum (9) on the pendulum rod (4) is just hit at the central position of an impact sample (7), an acceleration sensor (5) acquires acceleration data, the acceleration sensor is sequentially connected with a charge amplifier, a data acquisition system and a computer provided with a CRAS V7.0 vibration and dynamic signal acquisition and analysis system, signals acquired by the acceleration sensor are converted into voltage signals through the charge amplifier and then acquired by the data acquisition system, and finally an acceleration signal oscillogram is formed on the computer; when in use, the method comprises the following steps:
a. before measurement, an impact sample (7) which is the same as the impact sample (7) in the step 1) is taken again and placed in the middle of the clamp (6), a resistance strain gauge is installed on the impact sample (7), and the resistance strain gauge is sequentially connected with an electric bridge box, a strain amplifier, a data acquisition unit and a computer provided with a CRAS V7.0 vibration and dynamic signal acquisition and analysis system through a lead;
b. the lock catch rod (3) is swung up to the required height and fixed on a machine body shaft of the machine body (2), the pendulum bob (9) on the pendulum bob rod (4) is arranged in the lock catch (10) and is buckled through the lock catch (10), and then the pendulum bob (9) has downward potential energy; the lock catch (10) is opened, the pendulum bob (9) falls down to impact the impact sample (7), and the acceleration voltage value acquired by the acceleration sensor is displayed on a computer; c, when the pendulum bob (9) falls down and does not break the impact sample (7), continuing the step c; when the pendulum bob (9) falls down to break the impact sample (7), finishing acceleration measurement;
c. then the lock catch rod (3) is swung to be higher than the previous height and fixed on a machine body shaft of the machine body (2), a pendulum bob (9) on the pendulum bob rod (4) is arranged in the lock catch (10) and is buckled through the lock catch (10), and then the pendulum bob (9) has downward potential energy; the lock catch (10) is opened, the pendulum bob (9) falls down to impact the impact sample (7), and the acceleration voltage value acquired by the acceleration sensor is displayed on a computer; when the pendulum bob (9) falls down and does not break the impact sample (7), continuing the step d; when the pendulum bob (9) falls down to break the impact sample (7), finishing acceleration measurement;
d. repeating the step c until the pendulum bob (9) breaks the impact sample (7), and finishing acceleration measurement;
the acceleration sensor displays the acceleration voltage value acquired each time on a computer to form an acceleration voltage value oscillogram; when the pendulum bob (9) impacts the impact sample (7) every time, signals collected by a resistance strain gauge on the impact sample (7) are converted into voltage signals through the bridge box, the voltage signals are collected by a data collector after being amplified by a strain amplifier, and finally, a strain voltage value is displayed on a computer provided with a CRAS V7.0 vibration and dynamic signal collection and analysis system to form a strain voltage value oscillogram;
and finally, forming an acceleration voltage value oscillogram and a strain voltage value oscillogram on a computer, and reading the peak values in the acceleration voltage value oscillogram and the strain voltage value oscillogram to obtain the relation between the acceleration voltage value and the strain voltage value:
acceleration voltage value = strain voltage value ☓ 2.1382 (2);
and step 3), substituting the formula (2) into the formula (1) to obtain the relation between the instantaneous impact force and the acceleration as follows:
f = acceleration voltage value ☓ 4.38356/2.1382=2.05 ☓ acceleration voltage value N, thereby enabling measurement of instantaneous impact force;
in the step 2), the height of the machine body (2) can be adjusted, the machine body (2) comprises an upper machine body and a lower machine body, a machine body shaft is arranged at the top of the upper machine body, the lower machine body is fixed on a base (8), the upper machine body is sleeved in the lower machine body, and the height of the machine body (2) is adjusted by adjusting the position of the upper machine body in the lower machine body; first screws penetrate through the side walls of the upper machine body and the lower machine body, and the upper machine body and the lower machine body are fixed through the first screws, so that the machine body (2) is fixed after the height is adjusted;
the length of the pendulum rod (4) can be adjusted, the pendulum rod (4) comprises a first pendulum rod and a second pendulum rod, one end of the first pendulum rod is nested on a machine body shaft at the top of the machine body (2), and the pendulum (9) is arranged on the second pendulum rod; one end of the first pendulum rod can rotate around the machine body shaft, the other end of the first pendulum rod is sleeved in the second pendulum rod, and the length of the pendulum rod (4) can be adjusted by adjusting the position of the first pendulum rod in the second pendulum rod; and second screws penetrate through the side walls of the first pendulum rod and the second pendulum rod, and the first pendulum rod and the second pendulum rod are fixed through the second screws, so that the pendulum rod (4) is fixed after the length is adjusted.
2. A method of measuring an instantaneous impact force according to claim 1, wherein: in the step 2), the clamp (6) is detachably and replaceably fixedly connected with the base (8).
3. A method of measuring an instantaneous impact force according to claim 1, wherein: the model of the electronic universal testing machine is DNS 100.
4. A method of measuring an instantaneous impact force according to claim 1, wherein: the model of the bridge box is KD 7901.
5. A method of measuring an instantaneous impact force according to claim 1, wherein: the model of the strain amplifier is KD 6005.
6. A method of measuring an instantaneous impact force according to claim 1, wherein: the model of the data collector is AZ 308.
7. A method of measuring an instantaneous impact force according to claim 1, wherein: the type of the resistance strain gauge is Br120-2 AA.
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Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1168469A (en) * | 1981-09-04 | 1984-06-05 | John M. Mcandless | Constant pressure/g-force diffusion cell system |
| CN2494982Y (en) * | 2001-02-27 | 2002-06-12 | 唐振廷 | Digital ballistic testing machine |
| CN201402238Y (en) * | 2009-05-04 | 2010-02-10 | 上海聚德永升测控系统有限公司 | Oscillography impact test device with piezo-electric impact acceleration sensor |
| DE202012007351U1 (en) * | 2012-07-30 | 2012-09-06 | Bernd Zorn | Field tester for determination of deformation characteristics of asphalt surfaces |
| CN204008338U (en) * | 2014-06-25 | 2014-12-10 | 东北大学 | Pendulum shearing resistance impact testing machine |
| CN104897357B (en) * | 2015-04-08 | 2017-07-07 | 东北大学 | A kind of sheet metal tack-weld impact property test device and method |
| CN107807054B (en) * | 2017-10-19 | 2021-01-26 | 武汉华星光电半导体显示技术有限公司 | Multifunctional impact resistance testing device |
| CN206756574U (en) * | 2017-11-07 | 2017-12-15 | 陕西理工大学 | A kind of impingement testing machine for measuring plastic optical fibre intensity |
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2018
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