CN114518235A - Head collision injury tester based on electromagnetic loading - Google Patents
Head collision injury tester based on electromagnetic loading Download PDFInfo
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- CN114518235A CN114518235A CN202210148598.3A CN202210148598A CN114518235A CN 114518235 A CN114518235 A CN 114518235A CN 202210148598 A CN202210148598 A CN 202210148598A CN 114518235 A CN114518235 A CN 114518235A
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- 208000027418 Wounds and injury Diseases 0.000 title claims abstract description 19
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- 238000009499 grossing Methods 0.000 claims description 5
- 206010019196 Head injury Diseases 0.000 abstract description 2
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
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- 206010039203 Road traffic accident Diseases 0.000 description 2
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- 229910052742 iron Inorganic materials 0.000 description 2
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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
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/0078—Shock-testing of vehicles
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Abstract
The invention relates to a head collision injury tester based on electromagnetic loading, which comprises an electromagnetic control part, a driving part and a moving part. The primary coil is fixedly arranged, the electromagnetic control component is electrically connected with the primary coil, the secondary coil is attached to the primary coil, the loading rod sequentially penetrates through the primary coil and the secondary coil, and the front end of the loading rod is movably connected with the impact head through a connector. The electromagnetic control component is used for electrifying the primary coil to enable the primary coil to generate a first magnetic field, the secondary coil generates a second magnetic field under the action of the first magnetic field, and the first magnetic field and the second magnetic field are mutually exclusive to generate mutually exclusive thrust. The loading rod moves under the action of the mutual exclusion thrust to drive the impact head to move, so that the front end of the impact head impacts the upper trunk of the human body, the upper trunk of the human body drives the dummy head to do circular motion around the first rotating shaft under the action of impact, the electromagnetic force is used as a power source, the mutual exclusion thrust can be accurately adjusted by adjusting applied voltage, and the test precision of the head injury test is improved.
Description
Technical Field
The invention relates to the technical field of head injury tests, in particular to a head collision injury tester based on electromagnetic loading.
Background
The front collision of the automobile is a common accident form in actual traffic accidents, the research on the front collision of the automobile is developed, and the front collision of the automobile has positive promoting effects on improving the traffic accidents and improving the safety of passengers in the collision. The injury evaluation of the crash test dummy is obtained by collecting injury data such as acceleration, force, displacement and the like of the head of the dummy, and substituting the test data into the injury criterion of each part for calculation.
However, when a collision test is performed, the test equipment in the prior art is complex in structure and difficult to control, and the power source is composed of a spring and hydraulic equipment, so that the requirement of accurate adjustment is difficult to meet in terms of control force, and finally, the test error is large.
Accordingly, a head collision damage tester capable of improving test accuracy is urgently needed.
Disclosure of Invention
The invention aims to provide a head impact injury tester based on electromagnetic loading, which adopts electromagnetic force as loading power to improve the test precision of a head impact injury test.
In order to achieve the purpose, the invention provides the following scheme:
a head collision injury tester based on electromagnetic loading comprises an electromagnetic control component, a driving component and a moving component; the driving part comprises a primary coil, a secondary coil and a loading rod; the moving part comprises an impact head, a human upper trunk and a dummy head;
The primary coil is fixedly arranged; the electromagnetic control component is electrically connected with the primary coil; the electromagnetic control component is used for electrifying the primary coil to enable the primary coil to generate a first magnetic field;
the first side surface of the secondary coil is attached to the first side surface of the primary coil; the secondary coil is used for generating a second magnetic field under the action of the first magnetic field; the first magnetic field and the second magnetic field are mutually exclusive to generate mutually exclusive thrust; the magnitude of the repulsive thrust is determined by the magnitude of the voltage electrified by the electromagnetic control component to the primary coil;
the loading rod sequentially penetrates through the primary coil and the secondary coil; the loading rod moves under the action of the mutual exclusion thrust, and the movement direction of the loading rod is defined as front;
the front end of the loading rod is movably connected with the impact head through a connector; the bottom end of the upper trunk of the human body is sleeved on the first rotating shaft, and the dummy head is connected to the top end of the upper trunk of the human body through a spring; the loading rod is used for driving the impact head to move, so that the front end of the impact head impacts the upper trunk of the human body; the human upper trunk drives the dummy head to do circular motion around the first rotating shaft under the action of the impact.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention provides a head collision injury tester based on electromagnetic loading, which comprises an electromagnetic control part, a driving part and a moving part. The primary coil is fixedly arranged, the electromagnetic control component is electrically connected with the primary coil, the secondary coil is attached to the primary coil, the loading rod sequentially penetrates through the primary coil and the secondary coil, and the front end of the loading rod is movably connected with the impact head through a connector. The electromagnetic control component is used for electrifying the primary coil to enable the primary coil to generate a first magnetic field, the secondary coil generates a second magnetic field under the action of the first magnetic field, and the first magnetic field and the second magnetic field are mutually exclusive to generate mutually exclusive thrust. The loading rod moves under the action of the mutual repulsion thrust to drive the impact head to move, so that the front end of the impact head impacts the upper trunk of the human body, and the upper trunk of the human body drives the dummy head to do circular motion around the first rotating shaft under the impact action.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic view of the structure of a test apparatus provided in example 1 of the present invention;
FIG. 2 is a schematic structural diagram of a test apparatus provided in embodiment 1 of the present invention in a motion state;
FIG. 3 is a schematic perspective view of a test apparatus provided in example 1 of the present invention;
fig. 4 is a schematic structural diagram of a primary coil and a cable connector provided in embodiment 1 of the present invention;
FIG. 5 is a graph of voltage versus repulsive thrust provided in accordance with embodiment 1 of the present invention;
FIG. 6 is a graph of waveforms of repulsive forces at 350V according to embodiment 1 of the present invention.
Description of the symbols:
1-dummy head; 2-the upper torso of a human body; 3-a middle rod; 4-a striking head; 5, bearing seats; 6, connecting heads; 7-an amplifier; 8-a secondary coil; 9 — primary coil; 10-a mass block; 11-cable joint; 12-a first mass lower seat; 13-a buffer block; 14-a second fixed clamp; 15-loading rod; 16-a base plate; 17-table legs; 18-test stand; 19-electromagnetic control means; 20-a first fixed clamp; 21-a second mass lower seat; TMO-step up transformer; d1 — first rectifying diode; d2 — second rectifying diode; m1 — first rectifying thyristor; m2-second rectifying thyristor; r1 — current limiting resistor; l1 — smoothing inductor; c1 — pulse capacitance; m3-discharge thyristor; d3-free wheeling diode.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The invention aims to provide a head collision injury tester based on electromagnetic loading, which is mainly used for simulating a head collision injury test of a front seat of a vehicle in front collision and a head of a rear passenger in front collision.
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description thereof.
Example 1:
when carrying out bump test, prior art's test equipment structure is complicated so that be difficult to control, and the power supply comprises spring and hydraulic equipment, is difficult to satisfy the requirement of accurate regulation in the control force, finally leads to test error very big. Although the effect of the whole vehicle collision test is close to the actual effect, the loss is too large, the requirements on sites and equipment are high, and the realization is difficult. The pendulum impact power source has obvious defects in speed, acceleration regulation and test precision. Therefore, in order to improve the test precision of the head impact test, widen the speed adjustable range and reduce the test cost, a tester using a new loading power source is urgently needed.
This embodiment is used to provide an electromagnetic loading based head impact injury tester, as shown in fig. 1, 2 and 3, which includes an electromagnetic control part 19, a driving part and a moving part.
The electromagnetic control part 19 comprises a power supply, a step-up transformer TMO, a rectifier bridge, a current-limiting resistor R1, a smoothing inductor L1, a pulse capacitor C1, a freewheeling diode D3 and a discharging thyristor M3. The input end of the boosting transformer is connected with the power supply, and the output end of the boosting transformer is connected with the rectifier bridge. The positive pole of rectifier bridge connects the negative pole of pulse capacitor, and the negative pole of rectifier bridge connects the positive pole of current-limiting resistor, and the positive pole of flat wave inductance is connected to the negative pole of current-limiting resistor, and the positive pole of pulse capacitor is connected to the negative pole of flat wave inductance. The freewheeling diode is connected in parallel with the pulse capacitor. The positive pole of the pulse capacitor is connected with the positive pole of the discharge controllable silicon, the negative pole of the discharge controllable silicon is connected with the positive pole of the primary coil 9, and the negative pole of the pulse capacitor is connected with the negative pole of the primary coil 9.
The step-up transformer is used for boosting the alternating current output by the power supply. The rectifier bridge is used for converting the boosted alternating current into direct current. The current limiting resistor is used for limiting the current of the branch where the current limiting resistor is located so as to prevent the current from being too large and burning out the components connected in series. The smoothing inductor is used for inhibiting ripples, so that direct current output by the rectifier bridge is close to ideal direct current, and the pulse capacitor is charged. The pulse capacitor is used for supplying power to the discharge controllable silicon so as to discharge the discharge controllable silicon and electrify the primary coil 9. The freewheeling diode is used to prevent reverse charging. Based on the above-described device functions, the operation principle of the electromagnetic control section 19 of the present embodiment is: 380V voltage output by the power supply is boosted by the booster transformer, is changed into direct current by the rectifier bridge, is loaded to the positive electrode and the negative electrode of the pulse capacitor through the current-limiting resistor and the flat wave inductor, and is discharged by the discharging silicon controlled rectifier controlled by the PLC after the pulse capacitor is charged, so that the voltage is loaded to the primary coil 9. It should be noted that the voltage value output by the power supply can be any preset value, and is only 380V taken as an example here.
Specifically, the rectifier bridge includes a first rectifier diode D1, a second rectifier diode D2, a first rectifier thyristor M1, and a second rectifier thyristor M2. The first rectifying diode and the first rectifying silicon controlled rectifier are connected in series to form a first circuit, the second rectifying diode and the second rectifying silicon controlled rectifier are connected in series to form a second circuit, and the first circuit and the second circuit are connected in parallel to form a rectifying bridge. The output end of the step-up transformer is respectively connected between the first rectifying diode and the first rectifying silicon controlled rectifier and between the second rectifying diode and the second rectifying silicon controlled rectifier, namely the output end of the step-up transformer is respectively connected with the anode of the first rectifying silicon controlled rectifier and the anode of the second rectifying silicon controlled rectifier.
The driving part of the present embodiment includes a primary coil 9, a secondary coil 8, and a loading rod 15. The primary coil 9 is fixedly arranged, the electromagnetic control part 19 is electrically connected with the primary coil 9 through a cable, and the electromagnetic control part 19 is used for electrifying the primary coil 9 to enable the primary coil 9 to generate a first magnetic field. The first side of the secondary coil 8 is attached to the first side of the primary coil 9, and the secondary coil 8 is used for generating an eddy current under the action of the first magnetic field so as to induce a second magnetic field. The first magnetic field and the second magnetic field repel each other to generate repulsive thrust whose magnitude is determined by the magnitude of the voltage applied to the primary coil 9 by the electromagnetic control section 19. The loading rod 15 passes through the primary coil 9 and the secondary coil 8 in sequence. When the loading rod 15 works, the electromagnetic control component 19 energizes the primary coil 9, the primary coil 9 generates a first magnetic field, the secondary coil 8 generates a second magnetic field, mutual repulsion thrust required by a head collision test is generated between the first magnetic field and the second magnetic field, and the loading rod 15 moves under the action of the mutual repulsion thrust. The present embodiment defines that the moving direction of the loading rod 15 is front, the first side surface of the primary coil 9 is specifically the front side surface of the first coil, and the first side surface of the secondary coil 8 is specifically the back side surface of the secondary coil 8.
Specifically, as shown in fig. 4, the primary coil 9 of the present embodiment is a cake shape, which is formed by winding copper strips, the copper strips are insulated by resin and glass fiber, the outer surface is sealed by resin, and the wire inlet and outlet positions at both ends are connected with the cable connectors 11 to be connected with the electromagnetic control part 19 by cables. The secondary coil 8 is a round copper plate with a hole in the center, the back side surface of the secondary coil 8 is tightly attached to the front side surface of the primary coil 9, the secondary coil 8 and the electrified primary coil 9 generate electromagnetic induction, and electromagnetic repulsion force (namely mutual repulsion thrust) is induced to generate electromagnetic driving force.
The drive member of this embodiment further comprises a mass 10, a cable connector 11, a first mass lower seat 12 and a first fixing clip 20. The mass 10 and the cable connection 11 are both arranged on a first mass lower seat 12, and a first fixing clamp 20 is bolted to the first mass lower seat 12 for fixing the mass 10 and the cable connection 11 on the first mass lower seat 12. The back side of the primary coil 9 is fixedly connected to the front side of the mass 10 to fix the mass 10, the primary coil 9 and the cable connector 11 together, and the loading rod 15 passes through the mass 10, the primary coil 9 and the secondary coil 8 in sequence. Specifically, the primary coil 9 may be bolted to the front side of the mass 10, and more specifically, the primary coil 9 may be fixed to the mass 10 by three isosceles bolts to prevent vibrations from occurring under electromagnetic impact. The primary coil 9 is connected by cable to the electromagnetic control unit 19 via a cable connection 11.
In order to limit the movement of the loading rod 15, the driving member of this embodiment further includes a buffer block 13, a second mass lower seat 21, and a second fixing clip 14. The buffer block 13 is disposed on the second lower mass block seat 21, and the second fixing clamp 14 is bolted to the second lower mass block seat 21 to fix the buffer block 13 on the second lower mass block seat 21. The front side surface of the buffer block 13 is opposite to the rear side surface of the mass block 10, the loading rod 15 sequentially penetrates through the buffer block 13, the mass block 10, the primary coil 9 and the secondary coil 8, and a boss is arranged at the rear end of the loading rod 15. The rear side surface of the buffer block 13 is provided with a groove, buffer media such as plasticine are filled in the groove, the loading rod 15 moves forward under the drive of mutual repulsion thrust, and when the boss impacts the buffer media in the groove, the loading rod 15 stops moving to block the movement of the loading rod 15. The primary coil 9 and the secondary coil 8 generate electromagnetic repulsion force to push the amplifier 7 to drive the loading rod 15 to horizontally emit, and finally stop at the buffer medium arranged in the buffer block 13.
The first mass block lower seat 12 and the second mass block lower seat 21 are fixedly arranged on the bottom plate 16, and the bottom plate 16 is connected with the test bed 18 through the table legs 17 through bolts.
The driving part of the embodiment further comprises an amplifier 7, and the back side surface of the amplifier 7 is closely attached to the front side surface of the secondary coil 8. The amplifier 7 is a conical iron block, in particular a truncated cone-shaped iron block, and is used for adjusting the waveform of the impact force. The loading rod 15 may pass through the buffer block 13, the mass 10, the primary coil 9, the secondary coil 8, and the amplifier 7 in sequence. Specifically, the loading rod 15 may pass through the central holes of the buffer block 13, the mass block 10, the primary coil 9, the secondary coil 8, and the amplifier 7 in sequence.
The moving parts of the present embodiment include an impact head 4, a human upper torso 2, and a dummy head 1. The front end of the loading rod 15 is movably connected with the impact head 4 through the connector 6, specifically, the front end of the loading rod 15 is in threaded connection with the rear end of the connector 6, the front end of the connector 6 is in pin connection with the rear end of the impact head 4, a rolling bearing is arranged in the loading rod, so that the impact head 4 can rotate around the axis of a pin, and the front end of the impact head 4 can be a conical head. The bottom end of the trunk 2 on the human body is sleeved on a first rotating shaft, the first rotating shaft is installed on a bearing seat 5, the bearing seat 5 is fixedly installed on a test bed 18 through a bolt, and the trunk 2 on the human body can rotate circumferentially along the bearing seat 5. The top end of the human body upper body 2 is provided with an inclined plane boss which can be provided with a spring, the dummy head 1 is arranged on the human body upper body 2 through the spring, namely, the dummy head 1 is connected on the top end of the human body upper body 2 through the spring. The loading rod 15 drives the impact head 4 to move under the action of mutual repulsion thrust, so that the front end of the impact head 4 impacts the upper trunk 2 of the human body, and the upper trunk 2 of the human body drives the dummy head 1 to do circular motion around the first rotating shaft under the action of impact.
Specifically, the surface of the human upper trunk 2, which is in contact with the impact head 4, is provided with an elongated slot, the impact head 4 can move along the elongated slot, the impact head 4 drives the human upper trunk 2 to drive the dummy head 1 to do circular swing, and after the dummy head swings for a certain distance, the impact head 4 is separated from the human upper trunk 2.
The moving part of this embodiment still includes intermediate lever 3, and intermediate lever 3 is a solid cylinder, and on the second axis of rotation was located to the bottom cover of intermediate lever 3, the second axis of rotation articulated on bearing frame 5, bearing frame 5 and 18 bolted connection of test bench to with bearing frame 5 fixed mounting on test bench 18, intermediate lever 3 can be followed bearing frame 5 and be the circular rotation. The impact head 4 is sleeved on the middle rod 3, is internally provided with a linear bearing, is connected with the middle rod 3 through the linear bearing, and can slide up and down along the middle rod 3.
The motion process of the tester provided by the embodiment is as follows: the loading rod 15 moves forwards horizontally under the action of electromagnetic driving force (namely, repulsive thrust) to drive the connecting head 6 and the impact head 4 to move forwards, the impact head 4 drives the middle rod 3 to rotate and simultaneously impacts the trunk 2 on the human body to rotate, the dummy head 1 makes circular motion along with the middle rod, the impact head 4 moves along a long groove arranged on the trunk 2 on the human body until the impact head 4 is separated from the trunk 2 on the human body, and a boss of the loading rod 15 is blocked and stopped by a buffer medium in the buffer block 13. The dummy head 1 is provided with a speed and acceleration sensor, and the dummy head 1 is used as a driven piece to impact on a front seat to simulate a head collision scene.
The electromagnetic control part 19 of the embodiment is used as a power source of the tester, the charging and discharging is controlled through the PLC touch screen, and the electromagnetic driving force is changed by changing the set voltage value, namely, the repulsive thrust is changed by adjusting the voltage value loaded on the primary coil 9. As shown in fig. 5, which is a graph of voltage versus repulsive thrust. Based on the relation curve, the mutual repulsion force of the first magnetic field and the second magnetic field can be adjusted by adjusting the voltage value output by the electromagnetic control component 19, so that the electromagnetic repulsion force between the primary coil 9 and the secondary coil 8 is changed, the movement speed and the acceleration of the loading rod 15 are changed, the impact rate of the impact head 4 is adjusted, the movement speed and the acceleration of the dummy head 1 are adjusted, head impact injury tests with different impact degrees are simulated, and the head impact injury tests under different impact scenes can be simulated.
FIG. 6 is a diagram showing a plurality of waveforms of repulsive thrust at 350V. As can be seen from fig. 6, the mutually repulsive thrust has the same waveform at the same voltage. Namely, the electromagnetic control has high control precision and good repeatability under the same impact force.
The head collision injury tester based on electromagnetic loading provided by the embodiment is mainly used for simulating the injury test of the front seat of the head collision of passengers under the action of inertia force when the aircraft and the automobile are impacted. The electromagnetic control part 19 discharges electricity to the primary coil 9, the primary coil 9 generates a first magnetic field, then the secondary coil 8 is caused to generate eddy current, so that a second magnetic field is induced, the first magnetic field and the second magnetic field are mutually exclusive, the loading rod 15 is pushed to move forwards by means of the mutually exclusive thrust, so that the impact head 4 is driven to move forwards, the impact head 4 impacts the upper trunk 2 of the human body, the dummy head 1 swings around the bottom bearing along with the upper trunk 2 of the human body in a circle, and the driven impact of the human head on the front-row seat is simulated. The tester can change the mutually exclusive thrust between the first magnetic field and the second magnetic field by adjusting the charging voltage of the electromagnetic control component 19, can ensure that the swing speed of the dummy head 1 is 0-120 m/s, has wide speed adjusting range, and improves the accuracy and the stability of the test by electromagnetic control.
The tester of this embodiment has the following advantage over the tester of the prior art:
(1) the dummy head 1 can move in an impacting manner by taking the simulated upper trunk 2 of the human body as a driven mechanism through the middle movement mechanism, the principle is feasible, the equipment is simple, and the operation is convenient.
(2) Compared with the whole vehicle collision, the cost is reduced, and the required site limitation is reduced.
(3) Compare in hydraulic spring combination drive control power precision high, repeatability stability is good, and easy operation, only need set for charging voltage, press charge-discharge button can.
(4) Different impact speed scenes can be simulated, high, medium and low speed collision tests can be realized by setting different charging voltages, and the functions are complete.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. A head collision injury tester based on electromagnetic loading is characterized by comprising an electromagnetic control component, a driving component and a moving component; the driving part comprises a primary coil, a secondary coil and a loading rod; the moving part comprises an impact head, a human upper trunk and a dummy head;
The primary coil is fixedly arranged; the electromagnetic control component is electrically connected with the primary coil; the electromagnetic control component is used for electrifying the primary coil to enable the primary coil to generate a first magnetic field;
the first side surface of the secondary coil is attached to the first side surface of the primary coil; the secondary coil is used for generating a second magnetic field under the action of the first magnetic field; the first magnetic field and the second magnetic field are mutually exclusive to generate mutually exclusive thrust; the magnitude of the repulsive thrust is determined by the magnitude of the voltage electrified by the electromagnetic control component to the primary coil;
the loading rod sequentially penetrates through the primary coil and the secondary coil; the loading rod moves under the action of the mutual exclusion thrust, and the movement direction of the loading rod is defined as front;
the front end of the loading rod is movably connected with the impact head through a connector; the bottom end of the upper trunk of the human body is sleeved on the first rotating shaft, and the dummy head is connected to the top end of the upper trunk of the human body through a spring; the loading rod is used for driving the impact head to move, so that the front end of the impact head impacts the upper trunk of the human body; the human upper trunk drives the dummy head to do circular motion around the first rotating shaft under the action of the impact.
2. The tester of claim 1, wherein the electromagnetic control components include a power supply, a step-up transformer, a rectifier bridge, a pulse capacitor and a discharge thyristor;
the input end of the boosting transformer is connected with the power supply, and the output end of the boosting transformer is connected with the rectifier bridge; the boosting transformer is used for boosting the alternating current output by the power supply;
the negative electrode of the rectifier bridge is connected with the positive electrode of the pulse capacitor; the positive electrode of the rectifier bridge is connected with the negative electrode of the pulse capacitor; the rectifier bridge is used for converting the boosted alternating current into direct current to charge the pulse capacitor;
the negative electrode of the pulse capacitor is connected with the negative electrode of the primary coil; the positive electrode of the pulse capacitor is connected with the positive electrode of the discharge controllable silicon; the negative electrode of the discharge controllable silicon is connected with the positive electrode of the primary coil; the discharge thyristor is used for electrifying the primary coil.
3. The tester of claim 2, wherein the rectifier bridge comprises a first rectifier diode, a second rectifier diode, a first rectifier thyristor, and a second rectifier thyristor;
the first rectifying diode and the first rectifying controllable silicon are connected in series to form a first circuit; the second rectifying diode and the second rectifying controllable silicon are connected in series to form a second circuit; the first line and the second line are connected in parallel; the output end of the boosting transformer is respectively connected between the first rectifying diode and the first rectifying silicon controlled rectifier and between the second rectifying diode and the second rectifying silicon controlled rectifier.
4. The tester of claim 2, wherein the electromagnetic control means further comprises a current limiting resistor, a smoothing inductor and a freewheeling diode;
the current limiting resistor and the smoothing inductor are arranged between the rectifier bridge and the pulse capacitor; the negative electrode of the rectifier bridge is connected with the positive electrode of the current-limiting resistor; the negative electrode of the current-limiting resistor is connected with the positive electrode of the flat wave inductor; the negative electrode of the flat wave inductor is connected with the positive electrode of the pulse capacitor;
the freewheeling diode is connected in parallel with the pulse capacitor.
5. The tester of claim 1, wherein the drive member further comprises a mass, a cable connector, a first mass lower seat, and a first stationary clamp; the mass block and the cable joint are both arranged on the first mass block lower seat; the first fixing clamp is used for fixing the mass block and the cable connector on the first mass block lower seat; the opposite surface of the first side surface of the primary coil is fixedly connected to the front side surface of the mass block; the primary coil is connected with the electromagnetic control component through the cable joint by a cable; the loading rod sequentially penetrates through the mass block, the primary coil and the secondary coil.
6. The tester of claim 5, wherein the drive member further comprises a bumper, a lower second mass seat, and a second retainer clip; the buffer block is arranged on the second mass block lower seat, and the second fixing hoop is used for fixing the buffer block on the second mass block lower seat; the front side surface of the buffer block is opposite to the rear side surface of the mass block; the loading rod sequentially penetrates through the buffer block, the mass block, the primary coil and the secondary coil;
a boss is arranged at the rear end of the loading rod, a groove is arranged on the rear side surface of the buffer block, and a buffer medium is filled in the groove; when the boss impacts the groove, the loading rod stops moving.
7. The meter of claim 1, wherein the drive member further comprises an amplifier; the rear side surface of the amplifier is attached to the opposite surface of the first side surface of the secondary coil.
8. The tester according to claim 1, wherein a surface of the upper torso of the human body, which is in contact with the impact head, is provided with a long groove, and the impact head moves along the long groove to drive the upper torso of the human body to move circularly around the first rotating shaft.
9. The meter of claim 1, wherein the moving member further comprises an intermediate rod; the bottom end of the middle rod is sleeved on the second rotating shaft; the impact head is sleeved on the middle rod and is connected with the middle rod through a linear bearing; the impact head slides up and down along the middle rod.
10. The tester of claim 9, wherein the first and second rotational shafts are each mounted on a bolt seat; and the bolt seat is fixedly arranged on the test bed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210148598.3A CN114518235A (en) | 2022-02-18 | 2022-02-18 | Head collision injury tester based on electromagnetic loading |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210148598.3A CN114518235A (en) | 2022-02-18 | 2022-02-18 | Head collision injury tester based on electromagnetic loading |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114518235A true CN114518235A (en) | 2022-05-20 |
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