CN201314867Y - Collision rate test controlling device of collision test bed - Google Patents
Collision rate test controlling device of collision test bed Download PDFInfo
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- CN201314867Y CN201314867Y CNU2008201993488U CN200820199348U CN201314867Y CN 201314867 Y CN201314867 Y CN 201314867Y CN U2008201993488 U CNU2008201993488 U CN U2008201993488U CN 200820199348 U CN200820199348 U CN 200820199348U CN 201314867 Y CN201314867 Y CN 201314867Y
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Abstract
The utility model discloses a collision rate test controlling device of collision test bed, which relates to collision test equipment field and comprises a speed testing motor and a comparator, wherein the output end of the speed testing motor is connected with the inverse input end of the comparator; the comparator outputs controlling signal; the utility model is characterized in that: the bed is provided with an acceleration transducer (7) used for detecting the collision rate; the output of acceleration transducer (7) is inputted into the computer control system through the processing circuit and an A/D converting circuit; the output of computer control system is connected with the normal phase input end of the comparator through a D/A converting circuit. The utility model has the advantages of simple structure, stable performance, easy operation and easy commissioning. Besides, the device can effectively and correctly control the collision rate of the collision test bed and solve the problems of unstable collision rate display and large control error in prior art.
Description
Technical field
The utility model relates to the dynamic environmental test equipment technical field, is specifically related to a kind of collision rate detection control apparatus of bump testing machine.
Background technology
Bump testing machine is a kind of impact test equipment, is mainly used to the environment that analog equipment is collided in use or transportation.Typical cam lift formula bump testing machine stage body mainly is made up of work top 1, cushion pad 2, guide pillar 3, cam mechanism 4, base 5 and dc speed-regulating motor 6 as shown in Figure 1.During work, dc speed-regulating motor 6 drives cam mechanism 4 by speed reduction unit and rotates, and cam mechanism 4 jacking work tops 1 move upward.When work top 1 rises to certain altitude, freely fall and hit on cushion pad 2, produce the impact pulse of semisinusoidal waveform.Because stressed in work top 1 uphill process cam, and work top 1 when freely falling cam do not stress, so dc speed-regulating motor 6 is under same driving voltage effect, work top 1 changes slowly when rising, and changes soon when work top 1 freely falls.
The collision rate detection control apparatus of bump testing machine as shown in Figure 2 at present, collision rate detects to be made up of speed measuring motor, treatment circuit and collision rate table, the rotating shaft of speed measuring motor and dc speed-regulating motor rotor are in transmission connection, and insert the collision rate table behind the treated circuit of speed measuring motor stator coil output electric signal and show current collision rate.Because the electric signal that the dc speed-regulating motor rotation speed change makes speed measuring motor record is extremely unstable, so the shown collision rate data double swerve in a certain scope of collision rate table.If the operator only relies on such data and adjusts collision rate by manual adjustment output circuit (see figure 2), obviously collision rate is wayward, and error is also big.Therefore the collision rate that adopts which kind of control mode could control bump testing machine effectively, accurately is the problem that we study.
Summary of the invention
The utility model provides a kind of collision rate detection control apparatus of bump testing machine, its objective is the collision rate that will effectively, accurately control bump testing machine, solves present collision rate and shows instability, the problem that departure is big.
For achieving the above object, the technical solution adopted in the utility model is: a kind of collision rate detection control apparatus of bump testing machine, comprise speed measuring motor and comparer, the rotating shaft of speed measuring motor is as rotating input end, be in transmission connection with the rotor of dc speed-regulating motor, the stator coil output terminal of speed measuring motor is connected with the inverting input of comparer, the output terminal of comparer is connected with the control end of rectification module, the output of rectification module is connected with the coil of dc speed-regulating motor, the inverting input of the output termination comparer of comparer forms the voltage negative feedback, its innovation is: stage body is provided with an acceleration transducer that is used for collision rate, the electric signal of acceleration transducer is exported the input end that connects the A/D change-over circuit behind the treated circuit, the input end of the output termination computer control system of A/D change-over circuit, the input end of the output termination D/A change-over circuit of computer control system, the normal phase input end of the output termination comparer of D/A change-over circuit.
Related content in the technique scheme is explained as follows:
1, in the such scheme, collision rate is meant the bottom shock surface of bump testing machine work top and the number of times that cushion pad was piled up in the clock time at 1 minute.It is to be come out according to the triggering state computation of sensor by computer control system.
2, in the such scheme, the output voltage of computer control system is self-adjusting.Its principle of work is: the actual collision rate that records is compared with the collision rate of testing requirements, adjust the output voltage size with certain step-length, make stage body require to carry out work according to the test collision rate.
3, in the such scheme, speed measuring motor is preferably wanted coaxial installation with dc speed-regulating motor.The signal of speed measuring motor output and computer control system output constitute a voltage negative feedback circuit on comparer, to guarantee the dc speed-regulating motor stabilization of speed.
4, in the such scheme, described acceleration transducer is installed on the table top, and its effect is the collision detection signal and gives computer control system through pre-amplification circuit and A/D change-over circuit.This programme acceleration transducer has two kinds of forms, and a kind of is piezoelectric type electric charge output acceleration transducer, and another kind is a piezoelectric type voltage output acceleration transducer.These two kinds of piezoelectric acceleration transducers all are prior art (domestic have at present Jiangsu Lianneng Electronic Technology Co., Ltd. produce), mainly be made up of base, mass, sensitive element and shell, principle of work is to utilize the piezoelectric effect of piezoelectric ceramics (piezoelectric crystal) and a kind of transducing product of producing.Piezoelectric type electric charge output acceleration transducer output that different is be the quantity of electric charge, and the output of piezoelectric type voltage output acceleration transducer is voltage.This voltage is the high resistant quantity of electric charge that utilizes the direct piezo electric effect output of piezoelectric crystal, and the low-resistance voltage signal that output one is directly proportional with mechanical quantity after the internal integrated circuit conversion produces.
Because the technique scheme utilization, the utility model compared with prior art has following advantage:
1, the utility model uses a computer and controls automatically, and is simple in structure, and stable performance is simple to operate, and debugging is convenient.
2, the utility model has improved the accuracy of whole bump testing machine system to the collision rate controlled.
3, the utility model adopts the D/A change-over circuit to have favorable expansibility and usable range flexibly.
4, why the utility model adopts the sensing element of acceleration transducer as rate control device, be because in bump testing machine, itself will measure the acceleration index of impact test, use acceleration transducer to kill two birds with one stone, can be used as the sensor of measuring acceleration on the one hand, can be used as the sensor of measuring collision rate on the other hand.Need not adopt other sensor to measure collision rate, make full use of existing resource.
Description of drawings
Accompanying drawing 1 is a cam lift formula bump testing machine stage body structural representation;
Accompanying drawing 2 detects control principle figure for existing bump testing machine collision rate;
Accompanying drawing 3 is that the utility model bump testing machine collision rate detects control principle figure.
In the above accompanying drawing: 1, work top; 2, cushion pad; 3, guide pillar; 4, cam mechanism; 5, base; 6, dc speed-regulating motor; 7, acceleration transducer.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described:
Embodiment: a kind of collision rate detection control apparatus of bump testing machine
As shown in Figure 3, this device mainly is made up of speed measuring motor, comparer, acceleration transducer 7, pre-amplification circuit, A/D change-over circuit, D/A change-over circuit and computer control system.The rotating shaft of speed measuring motor is as rotating input end, is in transmission connection with the rotor coaxial of dc speed-regulating motor.The stator coil output terminal of speed measuring motor is connected with the inverting input of comparer, and the output terminal of comparer is connected with the control end of rectification module, and the output of rectification module is connected with the coil of dc speed-regulating motor.The inverting input of the output termination comparer of comparer forms the voltage negative feedback.Stage body is provided with an acceleration transducer 7 that is used for collision rate, and this acceleration transducer 7 is piezoelectric type electric charge output acceleration transducer or piezoelectric type voltage output acceleration transducer, and acceleration transducer 7 is placed on the work top 1.The electric signal output of acceleration transducer 7 connects the input end of A/D change-over circuit behind pre-amplification circuit, the input end of the output termination computer control system of A/D change-over circuit, the input end of the output termination D/A change-over circuit of computer control system, the normal phase input end of the output termination comparer of D/A change-over circuit.
During work, acceleration transducer 7 collision detection signals are also given computer control system through pre-amplification circuit and A/D change-over circuit.Computer control system goes out collision rate according to the triggering state computation of sensor, and with the actual measurement collision rate and the collision rate of testing requirements compare, adjust the output of computer control system with certain step-length, the normal phase input end of comparer is received in computer control system output through the D/A change-over circuit, result relatively outputs to the control end of rectification module, promptly change the rotating speed of dc speed-regulating motor, play the effect of control collision rate.
The foregoing description only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the personage who is familiar with this technology can understand content of the present utility model and enforcement according to this, can not limit protection domain of the present utility model with this.All equivalences of being done according to the utility model spirit change or modify, and all should be encompassed within the protection domain of the present utility model.
Claims (3)
1, a kind of collision rate detection control apparatus of bump testing machine, comprise speed measuring motor and comparer, the rotating shaft of speed measuring motor is as rotating input end, be in transmission connection with the rotor of dc speed-regulating motor (6), the stator coil output terminal of speed measuring motor is connected with the inverting input of comparer, the output terminal of comparer is connected with the control end of rectification module, the output of rectification module is connected with the coil of dc speed-regulating motor (6), the inverting input of the output termination comparer of comparer forms the voltage negative feedback, it is characterized in that: stage body is provided with an acceleration transducer (7) that is used for collision rate, the electric signal of acceleration transducer (7) is exported the input end that connects the A/D change-over circuit behind the treated circuit, the input end of the output termination computer control system of A/D change-over circuit, the input end of the output termination D/A change-over circuit of computer control system, the normal phase input end of the output termination comparer of D/A change-over circuit.
2, collision rate detection control apparatus according to claim 1 is characterized in that: described acceleration transducer (7) is placed on the work top (1) for piezoelectric type electric charge output acceleration transducer, piezoelectric type electric charge output acceleration transducer.
3, collision rate detection control apparatus according to claim 1 is characterized in that: described acceleration transducer (7) is placed on the work top (1) for piezoelectric type voltage output acceleration transducer, piezoelectric type voltage output acceleration transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201993488U CN201314867Y (en) | 2008-11-25 | 2008-11-25 | Collision rate test controlling device of collision test bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201993488U CN201314867Y (en) | 2008-11-25 | 2008-11-25 | Collision rate test controlling device of collision test bed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201314867Y true CN201314867Y (en) | 2009-09-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201993488U Expired - Lifetime CN201314867Y (en) | 2008-11-25 | 2008-11-25 | Collision rate test controlling device of collision test bed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201314867Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095565A (en) * | 2010-12-20 | 2011-06-15 | 张光辉 | Impact test bed |
| CN111006958A (en) * | 2019-12-12 | 2020-04-14 | 苏州苏试试验集团股份有限公司 | Control device and control method of crash bench test bench |
-
2008
- 2008-11-25 CN CNU2008201993488U patent/CN201314867Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102095565A (en) * | 2010-12-20 | 2011-06-15 | 张光辉 | Impact test bed |
| CN111006958A (en) * | 2019-12-12 | 2020-04-14 | 苏州苏试试验集团股份有限公司 | Control device and control method of crash bench test bench |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SUZHOU GUANGBO MECHANICS ENVIRONMENT LABORATORY CO Free format text: FORMER OWNER: SUZHOU TESTING INSTRUMENT FACTORY Effective date: 20110425 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20110425 Address after: 215129 55 deer Road, hi tech Development Zone, Jiangsu, Suzhou Patentee after: Suzhou Guangbo Mechanics Environment Laboratory Co., Ltd. Address before: 215129 55 deer Road, hi tech Development Zone, Jiangsu, Suzhou Patentee before: Suzhou Testing Instrument Factory |
|
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 215129 55 deer Road, hi tech Development Zone, Jiangsu, Suzhou Patentee after: Suzhou Su extensive environmental reliability laboratory Co., Ltd. Address before: 215129 55 deer Road, hi tech Development Zone, Jiangsu, Suzhou Patentee before: Suzhou Guangbo Mechanics Environment Laboratory Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090923 |