CN102879167A - Worktable type electronic impact hammer - Google Patents
Worktable type electronic impact hammer Download PDFInfo
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- CN102879167A CN102879167A CN2012103619086A CN201210361908A CN102879167A CN 102879167 A CN102879167 A CN 102879167A CN 2012103619086 A CN2012103619086 A CN 2012103619086A CN 201210361908 A CN201210361908 A CN 201210361908A CN 102879167 A CN102879167 A CN 102879167A
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Abstract
The invention discloses a worktable type electronic impact hammer. The worktable type electronic impact hammer is characterized by comprising a worktable, a controller, a trigger and a direct-current power supply, wherein the controller and the trigger are respectively connected with the direct-current power supply; the controller is respectively connected with the trigger and an actuator; the actuator comprises a traction type electromagnet; an iron core extending part of the electromagnet is connected with a force sensor; an impact head with a protecting function is arranged at the front end of the force sensor; and the electromagnet is arranged on a platform of the worktable. The repeatability and the adjustability of impact force are guaranteed, the time for contact between the hammer and a mechanical structure to be measured is controlled reliably so as to obtain ideal force pulse, and the worktable type electronic impact hammer is particularly applied to modal analysis, automatic impact testing and finite element analysis (FEA) modal verification of the mechanical structure.
Description
Technical field
The present invention relates to the power hammer device of hammering method modal test, relate in particular to a kind of passing through the BCD switch regulating impulse time, generation can repeat, the working platform type electron bombardment power of variable-size impulsive force hammer.
Background technology
The test modal analysis method is used for the dynamic perfromance of measurement mechanical structure, its objective is the natural frequency, Mode Shape and the modal damping that obtain structure, with Transient Dynamics emulation or the humorous response analysis of carrying out physical construction.
Modal test often adopts hammering method.Hammering method is that the power hammer (impact hammer) that strong sensor utilize to be installed impacts (i.e. excitation) and tested physical construction, tries to achieve the method for physical construction modal parameter with pulse testing principle and modal theory by means of mode measuring technology and fast Fourier transform (FFT).In the hammering method test, to tested physical construction input is that hammer force is the exciting force signal, namely exported by the response acceleration signal of hammering physical construction each point by measuring, can try to achieve the transport function of physical construction by inputting (hammer force signal) and output (acceleration signal), obtain the self-vibration characteristic of physical construction.
According to motivational theory, the power pulse signal of input can be arbitrarily.But the pulse signal power spectrum of arbitrary shape is more random, even the component of some power spectrum is zero, so that the frequency response function denominator is zero, causes the frequency response function distorted.Facts have proved, the power pulse of δ functional form, its spectral line is straight, is comparatively desirable pumping signal.
At present hammering method test is beaten tested physical construction by the hammering of manually-operated power, and the size and Orientation of each hammer force is difficult to be consistent, and the actuation duration also be difficult to control, therefore repeatable poor, be difficult to motivate desirable power pulse.This just needs a kind of electron bombardment equipment of invention badly,
Summary of the invention
Purpose of the present invention is exactly that the actuation duration is difficult to control for the size and Orientation that solves the hammer force that prior art exists is hard to keep unanimously, and repeatability is poor, is difficult to motivate the problem of desirable power pulse; A kind of working platform type electron bombardment power hammer is provided; Guarantee repeatability and the controllability of impulsive force, control reliably duration of contact between tup and the tested physical construction, to obtain desirable power pulse, the model analysis, the auto impact that especially are applied to physical construction are tested and the FEA modelling verification.
To achieve these goals, the present invention adopts following technical scheme:
A kind of working platform type electron bombardment power hammer; comprise worktable, controller, trigger, direct supply; controller, trigger are connected with direct supply respectively; controller is connected with trigger, actuator respectively; described actuator comprises towed electromagnet; the iron core sponson of electromagnet is connected with the power sensor, and power sensor front end section is provided with the impact head that shields, and electromagnet is installed on the platform of worktable.
Between described iron core sponson and the power sensor for being threaded.
Described controller comprises optocoupler, field effect transistor, voltage stabilizing diode, voltage stabilizer, fine setting BCD switch, coarse adjustment BCD switch, the external trigger switch, LED light, field effect transistor (FET), at the line writing interface, power output interface 13, the external power source interface, second singlechip, the external trigger switch is connected with second singlechip by optocoupler, described fine setting BCD switch, coarse adjustment BCD switch is connected with second singlechip respectively, power output interface is connected with second singlechip by field effect transistor (FET) 11, the external power source interface is connected with Switching Power Supply by the 3rd connecting line, power output interface is connected with electromagnet by the 4th connecting line, be connected with second singlechip at the line writing interface, voltage stabilizer is connected with the external power source interface, LED light is connected with voltage stabilizing diode with second singlechip respectively, and voltage stabilizing diode is connected FET with LED light respectively with field effect transistor) be connected.
Described trigger comprises trigger power interface, trigger button, manual triggers interface, the first single-chip microcomputer, triggering selection interface, automatic trigger interface, described triggering selection interface is connected with interface on the first single-chip microcomputer by the 5th connecting line, the trigger power interface is connected with the direct voltage output interface of Switching Power Supply by the first connecting line, trigger button links to each other with power interface, manual triggers interface respectively, the first single-chip microcomputer is connected with automatic trigger interface, and described manual movable contact is sent out interface, trigger interface is connected with the external trigger switch of controller automatically.
Described controller and trigger all are to make printed circuit board (PCB) with as the supporter of electronic devices and components and the supplier of electrical connection according to circuit theory diagrams first, then components and parts are welded on the double-layer printing circuit board (PCB).
Worktable comprises upper seat, bottom support bracket, and the cooperation position of described upper seat, bottom support bracket is respectively equipped with long slot bore, and described upper seat, bottom support bracket connect by the bolt and nut of being located in the long slot bore.
Principle of work of the present invention: the present invention includes worktable, controller, trigger, direct supply; controller, trigger are connected with direct supply respectively; controller is connected with trigger, actuator respectively; described actuator comprises towed electromagnet; the iron core sponson of electromagnet is connected with the power sensor; power sensor front end section is provided with the impact head that shields, and electromagnet is installed on the platform of worktable.For being threaded, select as required different power sensors and impact head, to obtain required excited frequency between iron core sponson and the power sensor.
Described controller comprises optocoupler, field effect transistor, voltage stabilizing diode, voltage stabilizer, fine setting BCD switch, coarse adjustment BCD switch, the external trigger switch, LED light, field effect transistor (FET), at the line writing interface, power output interface 13, the external power source interface, second singlechip, the external trigger switch is connected with second singlechip by optocoupler, described fine setting BCD switch, coarse adjustment BCD switch is connected with second singlechip respectively, power output interface is connected with second singlechip by field effect transistor (FET) 11, the external power source interface is connected with Switching Power Supply by the 3rd connecting line, power output interface is connected with electromagnet by the 4th connecting line, be connected with second singlechip at the line writing interface, voltage stabilizer is connected with the external power source interface, LED light is connected with voltage stabilizing diode with second singlechip respectively, and voltage stabilizing diode is connected FET with LED light respectively with field effect transistor) be connected.Voltage stabilizer provides the burning voltage of 5V for whole pcb board.Controller passes through the driving voltage that field effect transistor (FET) generates 24V after receiving trigger pip, and powers to electromagnet by power output interface and connecting line.Namely do the linear accelerating motion after the electromagnet energising, iron core returns initial point after the outage under the effect of spring, finishes one-shot.The size of force sensor measuring impulsive force, impact head play the protection sensor.Inching switch and coarse adjustment switch are the BCD switch of 16 ary codes.The output pulse resolution of second singlechip is 0.5ms, and the scope of therefore exporting pulse is 0.5-128ms, and namely the conduction time of electromagnet is between 0.5-128ms.Electromagnet is longer conduction time, and iron core does that time of accelerated motion is just longer, and impulsive force is just larger, and therefore, rotation BCD switch can change the width of output pulse, changes the size of impulsive force.When the impact head extension elongation was maximum, it is maximum that impulsive force reaches.Be provided with at the line writing interface at controller, by making amendment to the program in the second singlechip at the line writing interface.LED light of every triggering is glimmered once, and voltage stabilizing diode is positioned over field effect transistor (FET) and plays before pressure stabilization function.In order to obtain the power pulse of desirable δ functional form, export pulse and be set to before impact head 19 touches by the test works, finish.
Trigger comprises trigger power interface, trigger button, manual triggers interface, the first single-chip microcomputer, triggering selection interface, automatic trigger interface, described triggering selection interface is connected with interface on the first single-chip microcomputer by the 5th connecting line, the trigger power interface is connected with the direct voltage output interface of Switching Power Supply by the first connecting line, trigger button links to each other with power interface, manual triggers interface respectively, the first single-chip microcomputer is connected with automatic trigger interface, and described manual movable contact is sent out interface, trigger interface is connected with the external trigger switch of controller automatically.Trigger is provided with manual triggers interface, automatic trigger interface, trigger produces trigger pip by selecting manual triggers and automatically triggering this dual mode, trigger pip exports external trigger switch on the controller to by automatic trigger interface or manual triggers interface, realizes automatic triggering and two kinds of generating modes of manual triggers of trigger pip.Wherein during manual triggers, the external trigger switch is linked to each other with the manual triggers interface, after the Switching Power Supply energising, press trigger button at every turn, electromagnet namely carries out one-shot; When automatically triggering, the external trigger switch is linked to each other with automatic trigger interface, in the first single-chip microcomputer, set in advance five kinds of trigger interval times to satisfy the needs of different occasions, and draw respectively five interfaces, will be wherein a certain interface with after the triggering selection interface is connected, namely selected this kind trigger interval time, after Switching Power Supply is switched on, trigger is started working voluntarily, and electromagnet is according to impacting continuously interval time.
Described controller and trigger all are to make printed circuit board (PCB) with as the supporter of electronic devices and components and the supplier of electrical connection according to circuit theory diagrams first, then components and parts are welded on the double-layer printing circuit board (PCB).
Worktable comprises upper seat, bottom support bracket, and the cooperation position of described upper seat, bottom support bracket is respectively equipped with long slot bore, and described upper seat, bottom support bracket connect by the bolt and nut of being located in the long slot bore.Electromagnet is bolted on the platform of upper seat, can regulate the relative position of upper seat and bottom support bracket by long slot bore, and fixes by bolt and nut, and its installation site is variable, highly adjustable, to adapt to different application scenarios.Bottom support bracket can be bolted on lathe or other experiment porchs.Electron bombardment power hammer produces trigger pip by trigger, controller output voltage after receiving trigger pip is that 24 volts instantaneous direct current is to actuator, motion produces impact to tested physical construction thereby the electromagnet in the actuator is made linear accelerating after energising, and electromagnet returns initial point after the outage.The size of impulsive force is measured by the power sensor that is installed in the electromagnet top.
Beneficial effect of the present invention:
1. the present invention designs firmly, and reliability is high, guarantees repeatability and the controllability of impulsive force, but both bump, but also single-impact;
2. control reliably duration of contact between tup and the tested physical construction, to obtain desirable power pulse;
3. replaceable power sensor and impact head especially are applied to model analysis, auto impact test and the FEA modelling verification of physical construction.
Description of drawings
Fundamental diagram when Fig. 1 electron bombardment power hammer triggers automatically;
Fig. 2 is the controller circuitry schematic diagram;
Fig. 3 electron bombardment power hammer Working table structure composition diagram;
Among the figure, 1. trigger power interface, 2. trigger button, 3. trigger interface, 4. the first single-chip microcomputer, 5. triggering selection interface, 6. automatic trigger interface is 7. finely tuned BCD switch, 8. coarse adjustment BCD switch, 9. external trigger switch 10.LED pilot lamp, 11. field effect transistors (FET), 12. at the line writing interface, 13. power output interface, 14. external power source interfaces, 15. second singlechips, 16. towed electromagnet, 17. the iron core sponson, 18. power sensors, 19. impact heads, 20. Switching Power Supply, 21. AC socket, 22. direct voltage output interfaces, 23. direct current output interfaces, 24. power lead, 25. the first connecting line, 26. second connecting lines, 27. the 3rd connecting lines, 28. the 4th connecting line, 29. the 5th connecting lines.30. upper seat, 31. bottom support brackets, 32. bolt and nuts, 33. slotted eyes.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing and embodiment.
A kind of working platform type electron bombardment power hammer; in conjunction with Fig. 1 to Fig. 3; comprise worktable, controller, trigger, direct supply; controller, trigger are connected with direct supply respectively; controller is connected with trigger, actuator respectively, and described actuator comprises towed electromagnet 16, and the iron core sponson 17 of electromagnet is connected with power sensor 18; power sensor 18 leading sections are provided with the impact head 19 that shields, and electromagnet 16 is installed on the platform of worktable.For being threaded, select as required different power sensors and impact head, to obtain required excited frequency between iron core sponson and the power sensor.
Described controller comprises optocoupler, field effect transistor, voltage stabilizing diode, voltage stabilizer, fine setting BCD switch 7, coarse adjustment BCD switch 8, external trigger switch 9, LED light 10, field effect transistor (FET) 11, at line writing interface 12, power output interface 13, external power source interface 14, second singlechip 15, external trigger switch 9 is connected with second singlechip 15 by optocoupler, described fine setting BCD switch 7, coarse adjustment BCD switch 8 is connected with second singlechip 15 respectively, power output interface 13 is connected with second singlechip 15 by field effect transistor (FET) 11, external power source interface 14 is connected with Switching Power Supply 20 by the 3rd connecting line 27, power output interface 13 is connected with electromagnet 16 by the 4th connecting line 28, be connected with second singlechip 15 at line writing interface 12, voltage stabilizer is connected with external power source interface 14, LED light 10 is connected with voltage stabilizing diode with second singlechip 15 respectively, and voltage stabilizing diode is connected FET with LED light 10 respectively with field effect transistor) 11 be connected.Voltage stabilizer provides the burning voltage of 5V for whole pcb board.Controller passes through the driving voltage that field effect transistor (FET) 11 generates 24V after receiving trigger pip, and gives electromagnet 16 power supplies by power output interface 13 and connecting line 28.Namely do the linear accelerating motion after electromagnet 16 energisings, iron core returns initial point after the outage under the effect of spring, finishes one-shot.Power sensor 18 is measured the size of impulsive force, and impact head 19 plays protection sensor 18.Inching switch 7 and coarse adjustment switch 8 are the BCD switch of 16 ary codes.The output pulse resolution of second singlechip 15 is 0.5ms, and the scope of therefore exporting pulse is 0.5-128ms, and namely the conduction time of electromagnet is between 0.5-128ms.Electromagnet is longer conduction time, and iron core does that time of accelerated motion is just longer, and impulsive force is just larger, and therefore, rotation BCD switch can change the width of output pulse, changes the size of impulsive force.When impact head 19 extension elongations were maximum, it is maximum that impulsive force reaches.Be provided with at line writing interface 12 at controller, by making amendment to the program in the second singlechip 15 at line writing interface 12.LED light of every triggering 10 is glimmered once, and voltage stabilizing diode plays pressure stabilization function before being positioned over field effect transistor (FET) 11.In order to obtain the power pulse of desirable δ functional form, export pulse and be set to before impact head 19 touches by the test works, finish.
Described trigger comprises trigger power interface 1, trigger button 2, manual triggers interface 3, the first single-chip microcomputer 4, triggering selection interface 5, automatic trigger interface 6, described triggering selection interface 5 is connected with interface on the first single-chip microcomputer 4 by the 5th connecting line 29, trigger power interface 1 is connected with the direct voltage output interface 22 of Switching Power Supply 20 by the first connecting line 25, trigger button 2 respectively with power interface 1, manual triggers interface 3 links to each other, the first single-chip microcomputer 4 is connected with automatic trigger interface 6, and described manual movable contact is sent out interface 3, automatically trigger interface 6 is connected with the external trigger switch 9 of controller.Trigger is provided with manual triggers interface 3, automatic trigger interface 6, trigger produces trigger pip by selecting manual triggers and automatically triggering this dual mode, trigger pip exports external trigger switch 9 on the controller to by automatic trigger interface 6 or manual triggers interface 3, realizes automatic triggering and two kinds of generating modes of manual triggers of trigger pip.Wherein during manual triggers, external trigger switch 9 is linked to each other with manual triggers interface 3, after Switching Power Supply 20 energisings, press trigger button 2 at every turn, electromagnet 16 namely carries out one-shot; When automatically triggering, external trigger switch 9 is linked to each other with automatic trigger interface 6, in the first single-chip microcomputer 4, set in advance five kinds of trigger interval times to satisfy the needs of different occasions, and draw respectively five interfaces, will be wherein a certain interface with after triggering selection interface 5 is connected, namely selected this kind trigger interval time, after Switching Power Supply 20 is switched on, trigger is started working voluntarily, and electromagnet 16 is according to impacting continuously interval time.
Described controller and trigger all are to make printed circuit board (PCB) with as the supporter of electronic devices and components and the supplier of electrical connection according to circuit theory diagrams first, then components and parts are welded on the double-layer printing circuit board (PCB).
Described worktable comprises upper seat 30, bottom support bracket 31, and the cooperation position of described upper seat 30, bottom support bracket 31 is respectively equipped with long slot bore 33, and described upper seat 30, bottom support bracket 31 connect by the bolt and nut 32 of being located in the long slot bore 33.Electromagnet 16 is bolted on the platform of upper seat 30, can regulate the relative position of upper seat 30 and bottom support bracket 31 by long slot bore 33, and fixing by bolt and nut 32, its installation site is variable, highly adjustable, to adapt to different application scenarios.Bottom support bracket 31 can be bolted on lathe or other experiment porchs.
Structure composition when the electron bombardment power hammer that the present invention relates to triggers automatically and principle of work are as shown in Figure 1, Switching Power Supply 20(24V, 6A) link to each other with the AC socket 21 of Switching Power Supply 20 by power lead 24, the 220V alternating current is converted to the direct current of 24V to power to trigger and controller.Trigger power interface 1 links to each other with the direct voltage output interface 22 of Switching Power Supply 20 by the first connecting line 25.The first single-chip microcomputer 4 and 5 automatic trigger interval times of common decision of triggering selection interface, the two links to each other by the 5th connecting line 29.Trigger pip is by 6 outputs of automatic trigger interface, is sent to external trigger switch 9 on the controller by the second connecting line 26.Second singlechip 15 generates the driving voltage of 24V by switch with field-effect transistors (FET) 11 after receiving trigger pip, and give electromagnet 16 power supplies by power output interface 13 and the 4th connecting line 28.BCD switch 7 and 8 determines the time length of driving voltage.The 3rd connecting line 27 is connecting the direct current output interface 23 of Switching Power Supply and the external power source interface 14 on the controller.Namely do the linear accelerating motion after electromagnet 16 energisings, iron core returns initial point after the outage under the effect of spring, finishes one-shot.Power sensor 18 is measured the size of impulsive force, and impact head 19 plays protection sensor 18.
Although above-mentioned by reference to the accompanying drawings to the invention embodiment be described; but be not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection scope of the present invention.
Claims (6)
1. a working platform type electron bombardment power is hammered into shape; it is characterized in that; comprise worktable, controller, trigger, direct supply; controller, trigger are connected with direct supply respectively; controller is connected with trigger, actuator respectively, and described actuator comprises towed electromagnet, and the iron core sponson of electromagnet is connected with the power sensor; power sensor front end section is provided with the impact head that shields, and electromagnet is installed on the platform of worktable.
2. working platform type electron bombardment power as claimed in claim 1 hammer is characterized in that, between described iron core sponson and the power sensor for being threaded.
3. working platform type electron bombardment power as claimed in claim 1 is hammered into shape, it is characterized in that, described controller comprises optocoupler, field effect transistor, voltage stabilizing diode, voltage stabilizer, fine setting BCD switch, coarse adjustment BCD switch, the external trigger switch, LED light, field effect transistor, at the line writing interface, power output interface, the external power source interface, second singlechip, the external trigger switch is connected with second singlechip by optocoupler, described fine setting BCD switch, coarse adjustment BCD switch is connected with second singlechip respectively, power output interface is connected with second singlechip by field effect transistor, the external power source interface is connected with Switching Power Supply by the 3rd connecting line, power output interface is connected with electromagnet by the 4th connecting line, be connected with second singlechip at the line writing interface, voltage stabilizer is connected with the external power source interface, LED light is connected with voltage stabilizing diode with second singlechip respectively, and voltage stabilizing diode is connected with field effect transistor with LED light respectively.
4. working platform type electron bombardment power as claimed in claim 1 is hammered into shape, it is characterized in that, described trigger comprises the trigger power interface, trigger button, the manual triggers interface, the first single-chip microcomputer, the triggering selection interface, automatic trigger interface, described triggering selection interface is connected with interface on the first single-chip microcomputer by the 5th connecting line, the trigger power interface is connected with the direct voltage output interface of Switching Power Supply by the first connecting line, trigger button respectively with power interface, the manual triggers interface links to each other, the first single-chip microcomputer is connected with automatic trigger interface, and described manual movable contact is sent out interface, automatically trigger interface is connected with the external trigger switch of controller.
5. working platform type electron bombardment power as claimed in claim 1 is hammered into shape, it is characterized in that, described controller and trigger all are to make printed circuit board (PCB) with as the supporter of electronic devices and components and the supplier of electrical connection according to circuit theory diagrams first, then components and parts are welded on the double-layer printing circuit board.
6. working platform type electron bombardment power as claimed in claim 1 is hammered into shape, it is characterized in that, described worktable comprises upper seat, bottom support bracket, the cooperation position of described upper seat, bottom support bracket is respectively equipped with long slot bore, and described upper seat, bottom support bracket connect by the bolt and nut of being located in the long slot bore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210361908.6A CN102879167B (en) | 2012-09-25 | 2012-09-25 | Worktable type electronic impact hammer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210361908.6A CN102879167B (en) | 2012-09-25 | 2012-09-25 | Worktable type electronic impact hammer |
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| CN102879167A true CN102879167A (en) | 2013-01-16 |
| CN102879167B CN102879167B (en) | 2015-04-22 |
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| CN201210361908.6A Expired - Fee Related CN102879167B (en) | 2012-09-25 | 2012-09-25 | Worktable type electronic impact hammer |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103723569A (en) * | 2014-01-04 | 2014-04-16 | 李理 | Cloth laying pulley fixing device of spreading machine |
| CN105258784A (en) * | 2015-11-04 | 2016-01-20 | 北京工业大学 | Automatic pulse excitation modal parameter identification method and device |
| CN106053004A (en) * | 2016-08-05 | 2016-10-26 | 武汉理工大学 | Fiber grating impact hammer used for modal analysis |
| CN108844705A (en) * | 2018-07-01 | 2018-11-20 | 北京工业大学 | A kind of autompulse excitation frequency response test device and method |
| CN109000877A (en) * | 2018-05-25 | 2018-12-14 | 西北工业大学 | A kind of system excited by impact and the test macro based on system excited by impact |
| WO2019127072A1 (en) * | 2017-12-25 | 2019-07-04 | 东北大学 | Full-automatic modal impact hammer for experimental modal test and method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103723569A (en) * | 2014-01-04 | 2014-04-16 | 李理 | Cloth laying pulley fixing device of spreading machine |
| CN105258784A (en) * | 2015-11-04 | 2016-01-20 | 北京工业大学 | Automatic pulse excitation modal parameter identification method and device |
| CN105258784B (en) * | 2015-11-04 | 2018-11-02 | 北京工业大学 | A kind of autompulse excitation Modal Parameters Identification and device |
| CN106053004A (en) * | 2016-08-05 | 2016-10-26 | 武汉理工大学 | Fiber grating impact hammer used for modal analysis |
| WO2019127072A1 (en) * | 2017-12-25 | 2019-07-04 | 东北大学 | Full-automatic modal impact hammer for experimental modal test and method |
| CN109000877A (en) * | 2018-05-25 | 2018-12-14 | 西北工业大学 | A kind of system excited by impact and the test macro based on system excited by impact |
| CN108844705A (en) * | 2018-07-01 | 2018-11-20 | 北京工业大学 | A kind of autompulse excitation frequency response test device and method |
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| CN102879167B (en) | 2015-04-22 |
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