CN102466481A

CN102466481A - Direction sensor

Info

Publication number: CN102466481A
Application number: CN2010105334443A
Authority: CN
Inventors: 周俊弘
Original assignee: Shenzhen Yuzhan Precision Technology Co ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Shenzhen Yuzhan Precision Technology Co ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2010-11-05
Filing date: 2010-11-05
Publication date: 2012-05-23

Abstract

The invention relates to a direction sensor. The sensor comprises a tube body, light detection devices and light sources. The tube body is provided with a non-transparent tube wall, is filled with a flowing liquid, and is provided with a non-transparent ball floating on the flowing liquid surface, wherein two opposite sides of the tube wall are provided with light guide holes corresponding to each other. The light detection devices and the light sources are relatively arranged on both sides of the tube wall, wherein the light generated by each light source can irradiate to the corresponding light detection device by the light guide holes arranged on the two opposite sides of the tube wall, when the ball is positioned between the two light guide holes arranged on the two opposite sides of the tube wall, the light generated by the light source can be blocked and can not irradiate to the light detection device, and the light detection device generates a feedback signal for ball positioning. The direction sensor of the present invention judges the inclination direction of the tube body according to the following condition, and has advantages of high detection sensitivity and long work life, wherein the condition is that: whether the non-transparent ball blocks the light.

Description

Aspect sensor

Technical field

The present invention relates to a kind of aspect sensor, particularly a kind of aspect sensor that is used to detect vergence direction.

Background technology

Along with the development of automatic technology, in equipment such as building machinery, robot, medicine equipment, portable electron device, guarantee correct set, steadily of centre of gravity, it is indispensable that vergence direction is controlled.Common sensor adopts conducting sphere to detect, and under action of gravity, is rolled into precalculated position and conducting circuit for detecting through conducting sphere, thereby accomplishes the azimuth sensing of conducting sphere.Yet, conducting sphere between in use long after, surface oxidation easily causes electric conductivity to reduce even forfeiture, this will influence the detecting sensitivity and the mission life of aspect sensor.

Summary of the invention

In view of this, be necessary to provide a kind of aspect sensor of highly sensitive, long working life.

A kind of aspect sensor comprises body, some smooth arrangement for detecting and light source, and body is closed; Tube wall with non-printing opacity; The interior spheroid of filling a certain proportion of working fluid and being provided with a non-printing opacity of body, this spheroid floats on the surface of working fluid, and the relative both sides of tube wall are provided with the light-conductive hole of some mutual correspondences; Each light arrangement for detecting is arranged at a light-conductive hole place of tube wall; Each light source and each light arrangement for detecting are oppositely arranged, and the light that this each light source produces can be through this relative each light arrangement for detecting of light-conductive hole difference directive of the relative both sides of tube wall, in the body tilting procedure; The surface location of working fluid changes in the location following body of spheroid; Spheroid blocks the said smooth arrangement for detecting of light directive that said light source produces between two light-conductive holes of the relative both sides of tube wall the time, makes the light arrangement for detecting produce the feedback signal that is used to locate spheroid.

Whether aspect sensor of the present invention shuts out the light according to light tight spheroid is judged the vergence direction of body; Because the light tight characteristic of spheroid can not change with length service time of aspect sensor, avoids influencing the detecting sensitivity and the mission life of aspect sensor.

With reference to the accompanying drawings, in conjunction with specific embodiment the present invention is done further description.

Description of drawings

Fig. 1 is the synoptic diagram of the aspect sensor of one embodiment of the invention.

Fig. 2 is the cross-sectional schematic of the aspect sensor among Fig. 1.

Fig. 3 is the block diagram of the aspect sensor among Fig. 1.

Fig. 4 is the block diagram of the aspect sensor of another embodiment of the present invention.

Fig. 5 is the process flow diagram of the method for application aspect sensor shown in Figure 3.

The main element symbol description

Body 10

Tube wall 12

Light-conductive hole 14

Working fluid 16

Spheroid 18

Light arrangement for detecting 20

Light source 22

Pulsing circuit 24

Timer 25

Counting unit 26

Processing unit 28

Signal detection module 281

Direction determination module 282

Apart from determination module 283

Embodiment

Please refer to Fig. 1 and Fig. 2, the aspect sensor of one embodiment of the invention comprises body 10, places some smooth arrangement for detecting 20 and some light sources 22 outside the body 10.

Body 10 is closed, and Fig. 1 only illustrates the part of body 10, and body 10 can be shape arbitrarily according to applied occasion extension, and present embodiment middle tube body 10 is a bending.Body 10 has a tube wall 12, and tube wall 12 can be processed by non-light transmissive material.The relative both sides of tube wall 12 are formed with some light-conductive holes 14 in correspondence with each other, and direct projection light can pass through to corresponding light-conductive hole 14 on tube wall 12 opposite sides from the light-conductive hole 14 of tube wall 12 1 sides.Tube wall 12 is provided with three pairs of i.e. six light-conductive holes 14 in the present embodiment; And light-conductive hole 14 is all rounded; The quantity that is appreciated that ground light-conductive hole 14 can change according to the size of body 10 and the size of needs sensing body 10 change in location scopes, and shape also is not limited to circle, can be square etc.Tube wall 12 also can be processed by light transmissive material, on tube wall 12 outside surfaces, removes light-conductive hole 14 places again and is coated with the non-light transmissive material of last layer.

Fill a certain proportion of working fluid 16 in the body 10.Working fluid 16 can be light-permeable and mobile good materials such as water.Also be provided with a spheroid 18 in the body 10 simultaneously, the density of this spheroid 18 is less than the density of working fluid 16, so spheroid 18 swims in the surface of working fluid 16.When body 10 tilted, the surface location of working fluid 16 changed, and simultaneously the position of spheroid 18 was changed.

Light source 22 and light arrangement for detecting 20 all are arranged on light-conductive hole 14 places of body 10 both sides, and each light source 22 is oppositely arranged with each light arrangement for detecting 20.

Light source 22 is arranged on a side of tube wall 12 and corresponding respectively light-conductive hole 14 places that are arranged on this side in the present embodiment.22 pairs of light sources should a side a light-conductive hole 14, so light source 22 quantity are consistent with the quantity of the light-conductive hole 14 of this side, light source 22 is three in the present embodiment.The light that light source 22 sends can pass light-conductive hole 14 corresponding on tube wall 12 opposite sides from contiguous light-conductive hole 14.Light source 22 can be discharge lamp, tungsten lamp or fluorescent light etc.In the present embodiment, this light source 22 comprises light emitting diode, and energy consumption is low, brightness is high, the advantage of long working life thereby have.

Light arrangement for detecting 20 is arranged on the relative opposite side of tube wall 12 and corresponding respectively light-conductive hole 14 places that are arranged on this opposite side.A light-conductive hole 14 of this opposite side of light arrangement for detecting 20 corresponding tube walls 12; When spheroid 18 does not block between the light-conductive hole 14 of two correspondences on tube wall 12; The light that light source 22 sends can pass this light-conductive hole 14 is received by light arrangement for detecting 20, and therefore light arrangement for detecting 20 produces corresponding feedback signal.If body 10 run-off the straights; Spheroid 18 changes with the change in location on the surface of working fluid 16; When between the light-conductive hole 14 of two correspondences of spheroid 18 on tube wall 12; The light that light source 22 sends is blocked by spheroid 18, thereby can not be received by light arrangement for detecting 20, and therefore light arrangement for detecting 20 produces another corresponding feedback signal.This feedback signal that produces according to being blocked because of light can be judged the situation that the obliquity of body 10 changes.

Light arrangement for detecting 20 does not really want to be arranged on a side of tube wall 12 in other embodiments; As long as satisfy light arrangement for detecting 20 and the corresponding one by one setting of light source 22, and the luminous energy of light source 22 is got final product through corresponding two light-conductive holes 14 on the tube wall 12 and by 20 receptions of light arrangement for detecting.

Because whether this aspect sensor is to shut out the light according to light tight spheroid 18 to judge the vergence direction of body 10; And the light tight characteristic of spheroid 18 can not change with length service time of aspect sensor, therefore can not influence the detecting sensitivity and the mission life of aspect sensor.

Preferably, the size of spheroid 18 should be beneficial to spheroid 18 and better block the light through light-conductive hole 14 greater than the size of light-conductive hole 14, avoids producing the feedback signal of distortion.

Please refer to Fig. 3, this aspect sensor also further comprises pulsing circuit 24, counting unit 26 and processing unit 28.

This pulsing circuit 24 is used to produce a pulse signal.

This counting unit 26 is electrically connected with this pulsing circuit 24, is used to calculate the pulse number that this pulsing circuit 24 produces.

This processing unit 28 is electrically connected with light arrangement for detecting 20 and pulsing circuit 24.This processing unit 28 whenever produces a pulse signal at a distance from this pulsing circuit 24 of schedule time control in the duration of the feedback signal that these light arrangement for detecting 20 generation spheroids 18 shut out the light; Simultaneously when this pulsing circuit 24 produces pulse signal; Control this counting unit 26 and begin counting; And when pulsing circuit 24 stops to produce pulse signal, control this counting unit 26 zero clearings.This processing unit 28 also is used for confirming according to this feedback signal the vergence direction of body 10, and confirms the distance that the inclination of the pairing body 10 of quantity of this pulse is moved according to the corresponding relation of number of pulses and the displacement of spheroid 18 in body 10.

In the present embodiment, this processing unit 28 comprises signal detection module 281, direction determination module 282 and apart from determination module 283.

Whenever produce a pulse signal at a distance from this pulsing circuit 24 of schedule time control in the duration of the feedback signal that the spheroid 18 that this signal detection module 281 produces at this light arrangement for detecting 20 shuts out the light; And when this pulsing circuit 24 produces pulse signal, control this counting unit 26 and begin counting.This signal detection module 281 also is used for when this pulsing circuit 24 stops to produce pulse signal, with these counting unit 26 zero clearings.

This direction determination module 282 is used for confirming according to this feedback signal the vergence direction of body 10.For example; When body 10 is tilted to the right the surface that makes working fluid 16 when rising in the orientation shown in Fig. 1; Spheroid 18 will upwards block between a pair of light-conductive hole 14 by the top, with this light-conductive hole 14 corresponding light arrangement for detecting 20 are promptly produced feedback signal, and then definite body 10 be tilted to the right.

This confirms the slant distance of the pairing body 10 of umber of pulse of this counting unit 26 according to the corresponding relation of number of pulses and the displacement of spheroid 18 in body 10 apart from determination module 283.

Please refer to Fig. 4, above-mentioned counting unit 26 also can be replaced by a timer 25 with pulsing circuit 24 in other embodiments.This timer 25 is electrically connected with processing unit 28, when signal detection module 281 detecting light arrangement for detecting 20 when producing the feedback signal that spheroids 18 shut out the light, start this timer 25 timing.When this light arrangement for detecting 20 did not produce the feedback signal that spheroid 18 shuts out the light, these signal detection module 281 control timers 25 stopped timing and zero clearing.

Fig. 5 shows the operating process of the aspect sensor of one embodiment of the invention.In step S401, detect this light arrangement for detecting 20 and whether produce the feedback signal that shuts out the light of reflection spheroid 18, if this feedback signal not, execution in step S401; If feedback signal is arranged, execution in step S402 then.In step S402, the feedback signal that this direction determination module 282 shuts out the light according to this expression spheroid 18 is confirmed the vergence direction of body 10.In step S403, this signal detection module 281 these pulsing circuits 24 of control are every in light arrangement for detecting 20 produces duration of above-mentioned feedback signal to produce a pulse signal through a schedule time.In step S404, this signal detection module 281 is controlled this counting unit 26 and is begun counting when this pulsing circuit 24 produces pulse signal.In step S405, this confirms the slant distance of body according to the umber of pulse of this counting unit 26 apart from determination module 283.

In other embodiments, step S403 can be to step S405: these signal detection module 281 these timers 25 of control pick up counting.This feedback signal duration of being counted according to timer 25 apart from determination module 283 is confirmed the slant distance of body 10.

Claims

1. aspect sensor comprises:

The body of sealing, body comprises the tube wall of non-printing opacity, fills a certain proportion of working fluid in the body, and also is provided with the spheroid of a non-printing opacity in the body, and this spheroid floats on the surface of working fluid, and the relative both sides of tube wall are provided with the light-conductive hole of some mutual correspondences;

Some smooth arrangement for detecting are arranged on the light-conductive hole place; And

Some light sources, each light source and each light arrangement for detecting are oppositely arranged, and the light that this each light source produces can be through this relative each light arrangement for detecting of light-conductive hole difference directive of the relative both sides of tube wall;

In the body tilting procedure; The surface location of working fluid changes in the location following body of spheroid; Spheroid blocks the said smooth arrangement for detecting of light directive that said light source produces between two light-conductive holes of the relative both sides of tube wall the time, makes the light arrangement for detecting produce the feedback signal that is used to locate spheroid.

2. aspect sensor as claimed in claim 1; It is characterized in that: said smooth arrangement for detecting is arranged at a wherein side of tube wall and is separately positioned on each light-conductive hole place of a said side, and said light source is arranged at the relative opposite side of tube wall and is separately positioned on each light-conductive hole place of said opposite side.

3. aspect sensor as claimed in claim 1 is characterized in that also comprising:

Pulsing circuit is used to produce pulse signal;

Counting unit is used to calculate the quantity of the pulse signal of this generation; And

Processing unit; Be electrically connected with the light arrangement for detecting; Be used to control this pulsing circuit and in the duration of the feedback signal that the light arrangement for detecting produces, whenever produce pulse signal, and when pulsing circuit produced pulse signal, control counting unit began counting at a distance from a schedule time; And confirm the vergence direction of body and the quantity of the pulse signal of the generation of calculating according to this counting unit is confirmed the distance that body tilts according to this feedback signal.

4. aspect sensor as claimed in claim 3 is characterized in that, this processing unit comprises:

The signal detection module is used to control this pulsing circuit and in the duration of the feedback signal that the light arrangement for detecting produces, whenever produces pulse signal at a distance from a schedule time, and when pulsing circuit produced pulse signal, control counting unit began counting;

The direction determination module is used for confirming according to this feedback signal the vergence direction of body; And

Apart from determination module, the quantity of the pulse signal of the generation that is used for calculating according to this counting unit is confirmed the distance that body tilts.

5. like claim 3 or 4 described aspect sensors, it is characterized in that: this counting unit zero clearing is controlled in said processing unit or signal detection unit when pulsing circuit stops to produce pulse signal.

6. like any described aspect sensor in the claim 1-4 item, it is characterized in that: the size of said spheroid is greater than the size of light-conductive hole.