CN2847300Y - Speed detecotr - Google Patents

Abstract

The utility model provides a speed detector, which is characterized in that the utility model comprises a light-shielding strip, wherein the vicinity of a slope is provided with an infrared luminous tube and an infrared receiving tube which always lie in the induction state. Signals which are received by the infrared receiving tube are transmitted to a host machine of a speed measuring instrument. When the light-shielding strip passes through the infrared luminous tube and the infrared receiving tube, the output signals of the infrared receiving tube are different from the start of light shielding to the end of light shielding, and the utility model conducts the real-time display of speed at the time of collision by the processing of the host machine of the speed measuring instrument. The utility model is an instrument which is especially developed for collision experiment which is made by electric appliance products. When the utility model makes the collision experiment, the utility model can conduct real-time and accurate measurement of the instantaneous speed at the collision time of running carriers; the detection efficiency and the measuring accuracy are increased, and the measured data have actual effects and accuracy.

Description

Speed measuring instrument

Technical field

The utility model belongs to the technology of instrument and meter field, is a kind of speed measuring instrument to the household electrical appliance test specifically.

Background technology

In the household electrical appliance industry, for example tests such as some tests, aging, antifatigue, anti-collision will often be done by refrigerator, Washing Machine Factory.For these tests clear and definite index regulation is arranged all in national standard.In impact test, tested product is fixed on the carrier of advancing fast, and when running to several speed of stipulating by GB, carrier and collision body bump against, then the tested product energising is used, whether the impact that is brought is bumped against in detection influential to the normal use of tested instrument.Impact test realizes by following process, referring to Fig. 1, to the carrier of roller be housed, load onto tested product, place on the inclined-plane at an adjustable tilt angle, set out by initial position, the section that rolls downwards moves the back and bumps against with collision body, the pitch angle difference, the speed that finally reaches is also inequality, and these speed should be corresponding with the speed of GB regulation.The speed that will obtain the GB regulation usually will be adjusted the pitch angle (can conveniently adjust) on inclined-plane, and speed is to be got by following computing formula:

$s=\frac{1}{2}a{t}^2;$

a＝gsinθ；

$v=\mathrm{at}=\sqrt{2\mathrm{sg}\sin \mathrm{\θ}};$

S, displacement; A, acceleration; G, acceleration of gravity; θ, the pitch angle;

The speed that draws has like this been ignored the influence of friction force and other resistances, and under the certain situation of displacement, speed is only relevant with the pitch angle.And in fact, friction force is very big to the influence of speed, and the error of the speed that calculates with above-mentioned formula is also very big.How essence obtains accurate velocity amplitude, and many methods have been imagined by manufacturer, but these methods are not the cost height, is exactly that error is big, is not very desirable.In view of above reason, demand studying a kind of instrument that can carry out the scene, measure in real time above-mentioned impact velocity at the scene urgently.

How solving above-mentioned deficiency, then is the design problem that the utility model faced.

Summary of the invention

The utility model provides a kind of speed measuring instrument, and it can solve the existing problem that can not test the speed in real time that prior art exists.

In order to reach the purpose that solves the problems of the technologies described above, the technical solution of the utility model is, a kind of speed measuring instrument, it is characterized in that comprising the fillet that is in the light on the carrier that is contained in the delivery tested product, near doing the impact test inclined-plane, a pair of infraluminescence pipe and infrared receiving tube are installed, the infraluminescence pipe is relative with infrared receiving tube to be installed, be in sense state always, the signal that infrared receiving tube receives is sent to the speed measuring instrument main frame, between the fillet that is in the light is by infraluminescence pipe and infrared receiving tube, begin to be in the light and be in the light to end, the signal difference that infrared receiving tube is exported, through the speed measuring instrument host process, the speed when demonstrating collision in real time.

In further technical scheme of the present utility model, the fillet that is in the light is installed on the fillet adjusting gear, can adjust the position of fillet on the fillet adjusting gear of being in the light, fillet adjusting gear mount pad is contained on the carrier, infraluminescence pipe and infrared receiving tube are installed in the position and adjust on the seat, adjust seat and be provided with the track that can change the position, adjust seat and be installed in the bottom, inclined-plane near near the collision body.

In further technical scheme of the present utility model, the width range of the fillet that is in the light is 5-20mm.

In further technical scheme of the present utility model, the be in the light position of fillet, infraluminescence pipe and infrared receiving tube is adjusted to, make carrier move to when collision body is equivalent to be in the light the fillet width and pick up counting, and carrier and collision body when being about to collide timing finish.

In further technical scheme of the present utility model, include a light every circuit in the signal acquisition process module in the speed measuring instrument main frame, described light receives the control signal that the infraluminescence pipe sends every the luminous end of circuit, light-receiving end is through driving the look-at-me input end that amplifying circuit connects CPU, described CPU outputs to the speed at time of impact that calculates in the display device through serial line interface respectively by bus, outputs in the printing equipment through parallel interface.

In further technical scheme of the present utility model, described CPU passes through I ²The C bus links to each other with the RAM storer with EPROM, respectively initialize routine and the ephemeral data of CPU is stored.

In further technical scheme of the present utility model, the clock end of described CPU links to each other with external crystal-controlled oscillation through clock circuit, for CPU provides reference clock.

In further technical scheme of the present utility model, described light adopts a photoelectrical coupler to realize every circuit.

The signal of described speed measuring instrument is to be produced by a pair of infraluminescence pipe and receiving tube, whether the infraluminescence pipe is blocked, the signal difference that receiving tube is exported, the fillet that is in the light begin the to be in the light difference of the signal that time of finishing to being in the light transmitted according to receiving tube by the processor of instrument internal, the enabling counting device, draw the fillet that is in the light by the time between infraluminescence pipe and the receiving tube, then go out the average velocity of carrier during this period of time with the calculated with mathematical model of having set up, according to the differential principle, as the fillet that is in the light is enough narrow, promptly is similar to instantaneous velocity.

The utlity model has advantage and good effect:

1. the utility model speed measuring instrument is that the electric equipment products that aim at electrical apparatus industry are done collision experiment and a kind of instrument of developing, when doing collision experiment, can in real time, accurately measure the instantaneous velocity of operation carrier when collision, and can show in real time, print.

2. the utility model speed measuring instrument is an Artificial Intelligence Instrument, has avoided the artificial error of bringing of calculating of negligible friction, and is intuitive and reliable, improved detection efficiency and accuracy of measurement, makes determination data have more actual effect, accuracy.

3. the utility model speed measuring instrument has solved puzzlement electrical equipment producer problem for a long time, use the differential principle to measure the instantaneous velocity of operation carrier when collision dexterously, and cost is low, practical.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is a prior art collision experiment synoptic diagram;

1. tested electric equipment products; 2. carrier; 3. inclined-plane; 4. collision body; S, displacement; θ, the pitch angle;

Fig. 2 is the utility model collision experiment velocity determination synoptic diagram;

5. fillet adjusting gear; 6. fillet is in the light; 7. outer luminotron and receiving tube; 8. seat is adjusted in infraluminescence pipe and receiving tube position; 9. display screen; 10. printing equipment; 11. speed measuring instrument main frame; 12. signal wire; 13. power lead.

Fig. 3 is the theory diagram of speed measuring instrument.

Embodiment

Referring to Fig. 2 and Fig. 3, the fillet 6 that is in the light is installed on the fillet adjusting gear 5, and fillet adjusting gear 5 can be adjusted the position of fillet 6 on fillet adjusting gear 5 of being in the light, and the mount pad of fillet adjusting gear 6 is contained on the carrier 2.A pair of infraluminescence pipe 7 and infrared receiving tube 7 are installed in the position and adjust on the seat 8, and two pipes 7 are installed relatively, adjust seat 8 and are provided with the track that can change the position, so that the fine setting distance reaches proper states.Adjust seat 8 and be installed in 3 bottoms, inclined-plane near near the collision body 4.

By above-mentioned adjusting gear, to the be in the light position of fillet 6, infraluminescence pipe 7 and infrared receiving tube 7 is adjusted to, make carrier 2 move to when collision body 4 is equivalent to be in the light fillet 6 width and pick up counting, and carrier 2 when being about to collide with collision body 4 timing finish.In the present embodiment, the be in the light width L of fillet is 10mm.

A pair of infraluminescence pipe 7 and infrared receiving tube 7 are fixed near near the position of collision body 4 in bottom on the inclined-plane 3 of doing impact test, be in sense state always, and install a fillet 6 (can stop that infrared ray sees through) that certain width L is arranged in the relevant position of the carrier 2 that tested product 1 is housed, adjust infraluminescence pipe and receiving tube position adjustment structure, fillet adjusting gear, make and to move to apart from collision body L when far away by initial position when carrier, the fillet 6 that is in the light stops infraluminescence pipe 7, and the signal acquisition process module in the speed measuring instrument main frame 11 is started working.When the fillet 6 that is in the light had just entered infraluminescence pipe 7, infrared receiving tube was to the luminous end output high-level control signal of light every circuit, and luminous end is luminous to make the light-receiving end conducting, and then to driving amplifying circuit output high-level control signal.After described driving amplifying circuit carried out processing and amplifying to the high-level control signal of input, to the look-at-me input end INT0 of CPU output high level signal, control CPU entered interrupt routine.CPU has no progeny in entering, and calls timing program and picks up counting.When the fillet that is in the light had just left the infraluminescence pipe, infraluminescence Guan Xiangguang was every the luminous end output low level signal of circuit, and light-receiving end disconnects, and drove amplifying circuit to the look-at-me input end INT0 of CPU output low level signal, the CPU interrupt holdoff, and timing finishes.The system start-up software model is handled, and that is to say when carrier 2 contacts with collision body 4, and the used time T of operation L displacement can obtain, and the reference clock time that required time T receives by CPU multiply by count value and obtains.Reference clock that CPU obtains is provided by external crystal-controlled oscillation OSC by clock circuit.

According to formula:

V＝L/T，

Average velocity V when promptly calculating the test product collision.Fillet 6 is enough narrow if be in the light, the speed when this average velocity equals carrier 2 in theory and contacts with collision body 4.

Collision speed per hour that CPU will calculate and current date and time information show output by serial line interface on the one hand on display device, carry out real time print through parallel interface by printing equipment on the other hand.

Also include an EPROM program storage and a RAM random access memory in speed measuring instrument main frame 11, the initialize routine of EPROM storage CPU after system powers on, is passed through I ²The C bus transfer is given CPU, and then makes CPU enter normal mode of operation.The RAM random access memory is stored the ephemeral data that CPU produces.Speed measuring instrument main frame 11 has been realized collection and processing capacity to light signal by adopting the foregoing circuit structure, has finished the real-time demonstration output of impact velocity.

Claims (8)

1. speed measuring instrument, it is characterized in that comprising the fillet that is in the light on the carrier that is contained in the delivery tested product, near doing the impact test inclined-plane, a pair of infraluminescence pipe and infrared receiving tube are installed, the infraluminescence pipe is relative with infrared receiving tube to be installed, be in sense state always, the signal that infrared receiving tube receives is sent to the speed measuring instrument main frame, between the fillet that is in the light is by infraluminescence pipe and infrared receiving tube, begin to be in the light and be in the light to end, the signal difference that infrared receiving tube is exported, through the speed measuring instrument host process, the speed when demonstrating collision in real time.

2. speed measuring instrument according to claim 1, the fillet that it is characterized in that being in the light is installed on the fillet adjusting gear, can adjust the position of fillet on the fillet adjusting gear of being in the light, fillet adjusting gear mount pad is contained on the carrier, infraluminescence pipe and infrared receiving tube are installed in the position and adjust on the seat, adjust seat and be provided with the track that can change the position, adjust seat and be installed in the bottom, inclined-plane near near the collision body.

3. speed measuring instrument according to claim 1 and 2, the width range of the fillet that it is characterized in that being in the light is 5-20mm.

4. speed measuring instrument according to claim 3, it is characterized in that the being in the light position of fillet, infraluminescence pipe and infrared receiving tube is adjusted to, make carrier move to when collision body is equivalent to be in the light the fillet width and pick up counting, and carrier and collision body when being about to collide timing finish.

5. speed measuring instrument according to claim 1, it is characterized in that including a light every circuit in the signal acquisition process module in the speed measuring instrument main frame, described light receives the control signal that the infraluminescence pipe sends every the luminous end of circuit, light-receiving end is through driving the look-at-me input end that amplifying circuit connects CPU, described CPU outputs to the speed at time of impact that calculates in the display device through serial line interface respectively by bus, outputs in the printing equipment through parallel interface.

6. speed measuring instrument according to claim 5 is characterized in that: described CPU passes through I ²The C bus links to each other with the RAM storer with EPROM, respectively initialize routine and the ephemeral data of CPU is stored.

7. speed measuring instrument according to claim 6 is characterized in that: the clock end of described CPU links to each other with external crystal-controlled oscillation through clock circuit, for CPU provides reference clock.

8. speed measuring instrument according to claim 7 is characterized in that: described light adopts a photoelectrical coupler to realize every circuit.

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