CN102645654B - Distance detecting device and method - Google Patents
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- CN102645654B CN102645654B CN201110040053.2A CN201110040053A CN102645654B CN 102645654 B CN102645654 B CN 102645654B CN 201110040053 A CN201110040053 A CN 201110040053A CN 102645654 B CN102645654 B CN 102645654B
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Abstract
The invention discloses a distance detecting device and a distance detecting method. The device and the method are used for detecting the distance to be detected to an object. The distance detecting device comprises an emitter, a first receiver and a second receiver, wherein the emitter is used for emitting light rays in the emitting direction, the first receiver is arranged at one side of the emitter and is provided with a first light incidence surface used for receiving light rays reflected by the object to generate first electric signals, and the second receiver is arranged between the emitter and the first receiver and is provided with a second incidence surface used for receiving the light rays reflected by the object to generate second electric signals, wherein the first receiver is provided with a first electric signal distance curve, the second receiver is provided with a second electric signal distance curve, in addition, the first electric signal distance curve has a first wave crest, the second electric signal distance curve has a second wave crest, and the distance corresponding to the first wave crest is greater than the distance corresponding to the second wave crest. The distance detecting device and the distance detecting method have the advantages that whether the object is positioned in the preset distance or not is determined according to the intensity relationship of two electric signals, and the distance measuring accuracy is effectively improved.
Description
Technical field
The present invention relates to a kind of distance detection device and method; Particularly, the present invention relates to a kind of closely pick-up unit and method.
Background technology
Along with science and technology is fast-developing, the various instruments with span function are constantly weeded out the old and bring forth the new.From the most original tape measure, until various electronic distance measuring instrument, these instruments in response to the demand of different field to reach span object.Wherein, electronic range measurement method comprises electromagnetic positioning and electro-optical distance measurement.Take electro-optical distance measurement mode in main span instrument, and comparatively popular have infrared ambulator, laser range finder and ultrasonic sensor at least.Laser range finder and ultrasonic sensor have sensitive span accuracy, but expensive.Although infrared ambulator is comparatively cheap, its span accuracy do not have laser range finder and ultrasonic sensor good.
Generally speaking, the infrared ambulator of traditional type includes transmitter and receiver.When transmitter produces infrared ray and penetrates to object, receiver is received from the light of object reflection, to produce electric signal.Because traditional type infrared ambulator only has a receiver, its electric signal need compare with a fixed reference electric signal, to judge the spacing of infrared ambulator and object.In addition, the material of object can directly affect the power of reflection ray.If the material of object belongs to easy light-absorbing material, a little less than causing reflection ray too, the electric signal of generation also weakens thereupon, and then affects accuracy of measurement, or even can not compare with reference electrical signal, and cannot measure spacing.
Summary of the invention
An object of the present invention is to provide a kind of distance detection device and method, the curve of its application electric signal and distance, the predetermined minimum distance that decision will be measured.
Another object of the present invention is to provide a kind of distance detection device and method, it utilizes two receivers, in the mode that not affected by reflecting material, promotes the degree of accuracy of measuring.
Another object of the present invention is to provide a kind of distance detection device and method, and it utilizes angle and/or the position of adjusting between receiver and transmitter, accurately carries out close-in measurement.
Distance detection device of the present invention is in order to detect the testing distance to object.Distance detection device comprises transmitter, the first receiver and the second receiver.Transmitter is used for along transmit direction emission of light.The first receiver is arranged at a side of transmitter and has the first incidence surface, and the light reflecting for receiving object, to produce the first electric signal.The second receiver is arranged between transmitter and the first receiver and has the second incidence surface, and the light reflecting for receiving object, to produce the second electric signal.Wherein, the first receiver has the first electric signal-distance Curve, the second receiver has the second electric signal-distance Curve, and the first electric signal-distance Curve has primary peak, the second electric signal-distance Curve has secondary peak, and the distance that primary peak is corresponding is greater than the distance that secondary peak is corresponding.
It should be noted that the intersection point of the first electric signal-distance Curve and the second electric signal-distance Curve corresponding apart from essence, be preset distance.When testing distance is less than preset distance, the second electric signal is greater than the first electric signal, and when testing distance is greater than preset distance, the second electric signal is less than the first electric signal.
In an embodiment, transmitter has an exiting surface so that beam projecting to be provided, between the normal direction of the normal direction of the first incidence surface and the exiting surface of transmitter, there is the first angle, and between the normal direction of the second incidence surface and the normal direction of the first incidence surface, thering is the second angle, the first angle and the second angle are according to preset distance setting.
Distance detection method of the present invention, in order to detect the testing distance to object, this method comprises: distance detection device is provided, comprise transmitter, the first receiver and the second receiver, wherein the first receiver and the second receiver are arranged at a side of transmitter, the first receiver has the first electric signal-distance Curve, the second receiver has the second electric signal-distance Curve, and the first electric signal-distance Curve has primary peak, the second electric signal-distance Curve has secondary peak, and the distance that primary peak is corresponding is greater than the distance that secondary peak is corresponding; Transmitter is along transmit direction emission of light; The light that the first receiver and the second receiver reception object reflect is to produce respectively the first electric signal and the second electric signal; And obtain the testing distance of object or determine that object is whether in preset distance according to the first electric signal and the second electric signal.
Particularly, the intersection point of the first electric signal-distance Curve and the second electric signal-distance Curve is corresponding is preset distance apart from essence, when wherein testing distance is less than preset distance, the second electric signal is greater than the first electric signal, and testing distance is while being greater than preset distance, the second electric signal is less than the first electric signal.
Compared to prior art, distance detection device proposed by the invention and method are by the first receiver and the second receiver, to produce the first corresponding electric signal and the second electric signal, can not only detect and object between distance, more can and utilize the magnitude relationship of the first electric signal and the second electric signal, to determine whether object is positioned at preset distance, and then lifting capacity is apart from accuracy.In addition, distance detection device of the present invention can be passed through the electric signal magnitude relationship of two receivers, to determine whether object is positioned at preset distance, not only can not affected by reflecting material and effective hoisting load apart from accuracy.
Therefore, the present invention propose a kind of can lifting capacity apart from accuracy and the distance detection device and the method that not affected by reflecting material.
About the advantages and spirit of the present invention, can utilize the following detailed description and accompanying drawings to be further understood.
Accompanying drawing explanation
Figure 1 shows that an embodiment vertical view of distance detection device;
Figure 2 shows that the electric signal-distance Curve figure of the first receiver and the second receiver;
Figure 3 shows that distance detection device detects the electric signal-distance Curve figure of the first object and the second object;
Fig. 4 is the process flow diagram of distance detection method of the present invention.
Embodiment
A specific embodiment according to the present invention provides a kind of distance detection device.In this embodiment, this distance detection device can detect to the testing distance of object and judge that object is whether in preset distance.In an embodiment, distance detection device of the present invention and method are applied to close-in measurement, but not as limit.
Please refer to Fig. 1, Figure 1 shows that an embodiment vertical view of distance detection device 1.In fact, the shape of distance detection device 1 can be determined according to product actual demand, can be square, oblate or other difformity, with shown in embodiment, is not limited.
As shown in Figure 1, distance detection device 1 includes transmitter 10, the first receiver 20 and the second receiver 30.The first receiver 20 is arranged at a side of transmitter 10 and has the first incidence surface 25; The second receiver 30 is arranged between transmitter 10 and the first receiver 20 and has the second incidence surface 35.Transmitter 10 has exiting surface 15 so that beam projecting to be provided, and transmitter 10 is along transmit direction towards object 2 emission of lights.In actual applications, transmitter 10 is preferably invisible light, not as limit.In this embodiment, transmitter is infrared ray.The light that the first receiver 20 reflects for receiving object 2, to produce the first electric signal, and the light that the second receiver 30 reflects for receiving object 2, to produce the second electric signal.That is, the light that the first receiver 20 and the second receiver 30 are launched and reflected by object 2 towards object 2 for being received from transmitter 10, and produce respectively the first electric signal and second electric signal of corresponding received light heat input.
Particularly, the first receiver 20 has the first electric signal-distance Curve S1, the second receiver 30 has the second electric signal-distance Curve S2, and the first electric signal-distance Curve S1 has primary peak P1, the second electric signal-distance Curve S2 has secondary peak P2, the distance d1 that primary peak P1 is corresponding is greater than the distance d2 that secondary peak P2 is corresponding, as shown in Figure 2.The intersection point of the first electric signal-distance Curve S1 and the second electric signal-distance Curve S2 is corresponding is as shown in Figure 2 predetermined distance d s apart from essence, when wherein testing distance is less than predetermined distance d s, the second electric signal is greater than the first electric signal, and testing distance is while being greater than predetermined distance d s, the second electric signal is less than the first electric signal.About the relation between the first electric signal-distance Curve S1, the second electric signal-distance Curve S2 and preset distance and the first electric signal and the second electric signal, as described later in detail.
As shown in Figure 1, between the normal direction of the first incidence surface 25 of the first receiver 20 and the normal direction of the exiting surface 15 of transmitter 10, there is the first angle A 1.Similarly, between the normal direction of the first incidence surface 25 of the normal direction of the second incidence surface 35 of the second receiver 30 and the first receiver 20, there is the second angle A 2.In addition, the first receiver 20 and transmitter 10 respectively with the second receiver 30 at a distance of the first distance B 1 and second distance D2.
It should be noted that, the first distance B 1 and second distance D2 and the first angle A 1 and the second angle A 2 are chosen to make distance detection device 1 can determine according to the magnitude relationship of the first electric signal and the second electric signal whether object 2 is positioned at preset distance.
Particularly, adjust relative position and the angle of the first receiver 20, the second receiver 30 and transmitter 10, while making object 2 be positioned at preset distance, the first electric signal of reflection ray energy gained and the size of the second electric signal of the first receiver 20 and the corresponding object 2 of the second receiver 30 are identical.In this embodiment, preset distance is 5cm, and the first electric signal and the second electric signal belong to analog voltage, but not as limit.In practical application, the first distance B 1, between 8～10 millimeters (mm), is preferably 9mm; Second distance D2, between 13～15mm, is preferably 14mm.In addition, the first angle A 1, between 6～8 °, is preferably 7 °; And the second angle A 2, between 1～3 °, is preferably 2 °.
Please refer to Fig. 2, Figure 2 shows that the electric signal-distance Curve figure of the first receiver 20 and the second receiver 30.That is, utilize angle and the position of adjusting receiver, can obtain the unique relationship between object distance and electric signal.As shown in Figure 2, under the situation of above-mentioned default relative position, the first angle A 1 and the second angle A 2 are chosen to make the first receiver 20 and the second receiver 30 to have respectively the first electric signal-distance Curve S1 and the second electric signal-distance Curve S2 of different crests, wherein the first electric signal-distance Curve S1 and the second electric signal-distance Curve S2 intersection is in an intersection point, and the corresponding distance essence of this intersection point is preset distance.For example, in this embodiment, the first angle A 1, between 6～8 °, is preferably 7 °; And the second angle A 2, between 1～3 °, is preferably 2 °.
As shown in Figure 2, in distance, be 0.5cm place, the second electric signal is greater than the first electric signal.When distance is when 0.5cm zooms out to 1.5cm, it is large that the first electric signal slowly becomes, and the second electric signal is rapid, becomes large.Although distance zooms out, because of the position of the second receiver 30 compared with the first receiver 20 near transmitter 10, in this distance, have more reflection ray and enter the second receiver 30, so the variation of electric signal-distance Curve is comparatively obvious.When distance is when 1.5cm zooms out to 3.5cm, the first electric signal continues slowly to become large, and the second electric signal diminishes rapidly.This is the relation due to reflection angle and distance, and the reflection ray that the first receiver 20 is received is more and more, and it is fewer and feweri to enter the reflection ray of the second receiver 30.
When distance is when 3.5cm becomes greatly to 5cm, the reflection ray that enters the first receiver 20 and the second receiver 30 is fewer and feweri, and the first electric signal and the second electric signal are diminished gradually.Yet the speed diminishing due to the first electric signal is slow compared with the second electric signal, make two curves have intersection point in distance for 5cm place, wherein 5cm is preset distance.When distance is when 5cm pulls on as far as 10cm, the first electric signal and the second electric signal continue slowly to diminish, and the amplitude of variation of the second electric signal is greater than the amplitude of variation of the first electric signal, make the second electric signal be less than the first electric signal.
It should be noted that therefore, based on above-mentioned condition, for example, when object 2 is positioned at preset distance (5cm), the second electric signal is more than or equal to the first electric signal; For example, in the time of outside object 2 is positioned at preset distance (5cm), the second electric signal is less than the first electric signal.Therefore, distance detection device 1 is utilized the first electric signal, the second electric signal, the first electric signal-distance Curve and the second electric signal-distance Curve, can determine whether object 2 is positioned at preset distance.In other words, user can by the minimum distance measured of wish be set as preset distance, and according to relative angle and/or the position of this preset distance adjustment transmitter 10, the first receiver 20 and the second receiver 30, and then obtain the first electric signal-distance Curve S1 and the second electric signal-distance Curve S2, wherein the intersection point of the first electric signal-distance Curve S1 and the second electric signal-distance Curve S2 is preset distance (being 5cm in this example).Therefore, when distance detection device 1 is carried out while measuring, can be according to the magnitude relationship of the first electric signal and the second electric signal, determine that object is whether in preset distance.In addition, not only accurately whether judgment object 2 is in preset distance for distance detection device 1, and the electric signal that also can utilize the first receiver 20 and/or the second receiver 30 to produce in response to the light signal of object 2 reflections, carrys out direct-detection testing distance.
Please refer to Fig. 3, Figure 3 shows that distance detection device 1 for example, for the electric signal-distance Curve figure of different objects (the first object and the second object).In this embodiment, the material of the first object and the second object is different, that is the light that the first object and the second object are launched transmitter 10 has different absorbance logs.For example, the first object is plank, and the second object is black paper.As shown in Figure 3, because the second object (being black paper) has lower reflectivity compared to the first object (being plank), therefore a little less than the first electric signal of the first electric signal of corresponding the second object and all more corresponding the first object of the second electric signal and the second electric signal be.
As shown in Figure 3, in this embodiment, preset distance is 5cm.That is, for the first object and the second object, the first receiver 20 and the second receiver 30 have respectively the first electric signal-distance Curve S11 and the second electric signal-distance Curve S12 of corresponding the first object, and the first electric signal of corresponding the second object-distance Curve S21 and the second electric signal-distance Curve S22.As shown in Figure 3, although under above-mentioned relative angle and locality condition, the first receiver 20 and the second receiver 30 are different for the electrical signal intensity of the first object and the second object, have similar trend.That is, as shown in Figure 3, corresponding the first electric signal-distance Curve S11 of the first object and the intersection point of the second electric signal-distance Curve S12, and the intersection point of the first electric signal of corresponding the second object-distance Curve S21 and the second electric signal-distance Curve S22 is all positioned at distance for about 5cm place.Particularly, for example, in preset distance (5cm), no matter be the second corresponding electric signal that the first electric signal of the first electric signal-distance Curve S11 or the first electric signal-distance Curve S21 is all less than the second electric signal-distance Curve S12 or the second electric signal-distance Curve S22; And for example, outside preset distance (5cm), no matter be the second corresponding electric signal that the first electric signal of the first electric signal-distance Curve S11 or the first electric signal-distance Curve S21 is all greater than the second electric signal-distance Curve S12 or the second electric signal-distance Curve S22.Therefore, distance detection device 1 of the present invention is for the detection of different objects, even object materials different (that is reflecting effect is different), distance detection device 1 is still possessed goodish span accuracy.Therefore, distance detection device 1 of the present invention can be passed through the electric signal magnitude relationship of two receivers, to determine whether object is positioned at preset distance, not only can effective hoisting load apart from accuracy and not affected by reflecting material.
Fig. 4 is the process flow diagram of distance detection method of the present invention.This distance detection method comprises step 1010, distance detection device is provided, it comprises transmitter, the first receiver and the second receiver, wherein the first receiver and the second receiver are arranged at a side of transmitter, the first receiver has the first electric signal-distance Curve, the second receiver has the second electric signal-distance Curve, and the first electric signal-distance Curve has primary peak, the second electric signal-distance Curve has secondary peak, and the distance that primary peak is corresponding is greater than the distance that secondary peak is corresponding.The distance detection device providing in this, can be as shown in Figure 1, and wherein the second receiver is arranged between the first receiver and transmitter, but not as limit.In addition, as mentioned above, can utilize adjustment the first receiver and the second receiver with respect to position and the angle of transmitter, and make it there is respectively required the first electric signal-distance Curve and the second electric signal-distance Curve.
Compared to prior art, distance detection device proposed by the invention and method can not only detect and object between distance, more can utilize electric signal-distance Curve to set required preset distance, by the first receiver and the second receiver, to produce the first corresponding electric signal and the second electric signal, and by the magnitude relationship of the first electric signal and the second electric signal, to determine whether object is positioned at preset distance, and then lifting capacity is apart from accuracy.Because the distance detection device of traditional type only has a transmitter and a receiver, the electric signal of receiver only can compare with reference electrical signal, and the measurement effect obtaining is limited, and close-in measurement more has remarkable deficiency.Therefore, distance detection device of the present invention can not only detect and object between distance, more enough electric signal magnitude relationship of passing through two receivers, to determine whether object is positioned at preset distance, not only can effective hoisting load apart from accuracy and not affected by reflecting material.
Utilize the above detailed description of preferred embodiments, hope can be known description feature of the present invention and spirit more, and not with above-mentioned disclosed preferred embodiment, scope of the present invention is limited.On the contrary, its objective is that hope can contain in the scope of claim of being arranged in of various changes and tool equality institute of the present invention wish application.
Claims (7)
1. a distance detection device, in order to detect the testing distance to object, is characterized in that, above-mentioned distance detection device comprises:
Transmitter, for along transmit direction emission of light;
The first receiver, is arranged at a side of above-mentioned transmitter and has the first incidence surface, and the light reflecting for receiving above-mentioned object, to produce the first electric signal; And
The second receiver, is arranged between above-mentioned transmitter and above-mentioned the first receiver and has the second incidence surface, the light reflecting for receiving above-mentioned object, and to produce the second electric signal,
Wherein, above-mentioned the first receiver has the first electric signal-distance Curve, above-mentioned the second receiver has the second electric signal-distance Curve, and above-mentioned the first electric signal-distance Curve has primary peak, above-mentioned the second electric signal-distance Curve has secondary peak, the distance that above-mentioned primary peak is corresponding is greater than the distance that above-mentioned secondary peak is corresponding, the corresponding distance of intersection point of above-mentioned the first electric signal-distance Curve and above-mentioned the second electric signal-distance Curve is preset distance, when above-mentioned testing distance is less than above-mentioned preset distance, above-mentioned the second electric signal is greater than above-mentioned the first electric signal, when above-mentioned testing distance is greater than above-mentioned preset distance, above-mentioned the second electric signal is less than above-mentioned the first electric signal, above-mentioned distance detection device is utilized above-mentioned the first electric signal, above-mentioned the second electric signal, above-mentioned the first electric signal-distance Curve and above-mentioned the second electric signal-distance Curve determine whether above-mentioned object is positioned at above-mentioned preset distance.
2. distance detection device according to claim 1, it is characterized in that, between the normal direction of the normal direction of above-mentioned the first incidence surface and the exiting surface of above-mentioned transmitter, there is the first angle, between the normal direction of the normal direction of above-mentioned the second incidence surface and above-mentioned the first incidence surface, have the second angle, above-mentioned the first angle and above-mentioned the second angle are according to above-mentioned preset distance setting.
3. distance detection device according to claim 2, is characterized in that, above-mentioned the first angle is between 6～8 degree, and above-mentioned the second angle is between 1～3 degree.
4. distance detection device according to claim 1, it is characterized in that, the mid point of the mid point of above-mentioned the first incidence surface and above-mentioned the second incidence surface is at a distance of the first distance, the mid point of above-mentioned the second incidence surface and the mid point of above-mentioned transmitter are at a distance of second distance, and above-mentioned the first distance and above-mentioned second distance are according to above-mentioned preset distance setting.
5. distance detection device according to claim 4, is characterized in that, above-mentioned the first distance is between 8～10 millimeters, and above-mentioned second distance is between 13～15 millimeters.
6. distance detection device according to claim 1, is characterized in that, above-mentioned transmitter is infrared transmitter.
7. a distance detection method, in order to detect the testing distance to object, is characterized in that, above-mentioned distance detection method comprises:
Distance detection device is provided, comprise transmitter, the first receiver and the second receiver, wherein above-mentioned the first receiver and above-mentioned the second receiver are arranged at a side of above-mentioned transmitter, above-mentioned the first receiver has the first electric signal-distance Curve, above-mentioned the second receiver has the second electric signal-distance Curve, and above-mentioned the first electric signal-distance Curve has primary peak, above-mentioned the second electric signal-distance Curve has secondary peak, and the distance that above-mentioned primary peak is corresponding is greater than the distance that above-mentioned secondary peak is corresponding;
Above-mentioned transmitter is along transmit direction emission of light;
Above-mentioned the first receiver and above-mentioned the second receiver receive light that above-mentioned object reflects to produce respectively the first electric signal and the second electric signal; And
According to above-mentioned the first electric signal and above-mentioned the second electric signal, obtain the above-mentioned testing distance of above-mentioned object or determine that above-mentioned object is whether in preset distance;
Wherein the corresponding distance of the intersection point of above-mentioned the first electric signal-distance Curve and above-mentioned the second electric signal-distance Curve is above-mentioned preset distance, when above-mentioned testing distance is less than above-mentioned preset distance, above-mentioned the second electric signal is greater than above-mentioned the first electric signal, when above-mentioned testing distance is greater than above-mentioned preset distance, above-mentioned the second electric signal is less than above-mentioned the first electric signal, above-mentioned distance detection device is utilized above-mentioned the first electric signal, above-mentioned the second electric signal, above-mentioned the first electric signal-distance Curve and above-mentioned the second electric signal-distance Curve determine whether above-mentioned object is positioned at above-mentioned preset distance.
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| WO2020161075A1 (en) * | 2019-02-04 | 2020-08-13 | Ams International Ag | Proximity sensing based on ratio change detection |
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| CN103529454A (en) * | 2013-11-06 | 2014-01-22 | 中国科学院上海天文台 | Multi-telescope laser ranging system and method |
| CN105251823B (en) * | 2015-09-17 | 2017-08-04 | 中国石油天然气集团公司 | A kind of cold steel pipe machine automation control system of vertical hydraulic and method |
| CN107479057A (en) * | 2016-06-08 | 2017-12-15 | 科沃斯机器人股份有限公司 | Distance measuring sensor and its distance-finding method and self-moving device |
| CN107064948B (en) * | 2016-12-06 | 2023-09-05 | Oppo广东移动通信有限公司 | Sensor module and mobile terminal |
| CN106850101B (en) | 2017-02-14 | 2019-09-13 | Oppo广东移动通信有限公司 | Display screen condition control method and device |
| CN109413536B (en) * | 2018-12-20 | 2020-06-30 | 歌尔科技有限公司 | Wireless earphone box-entering detection method and device and wireless earphone charging box |
| CN114415660B (en) * | 2020-01-21 | 2023-08-08 | 追觅创新科技(苏州)有限公司 | Self-mobile device and ranging method thereof |
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| US7417718B2 (en) * | 2005-10-28 | 2008-08-26 | Sharp Kabushiki Kaisha | Optical distance measuring apparatus |
| KR100863245B1 (en) * | 2006-07-18 | 2008-10-15 | 삼성전자주식회사 | Beacon capable of detecting distance, position recognition system using the beacon and position recognition method thereof |
| CN201393304Y (en) * | 2009-04-10 | 2010-01-27 | 华南理工大学 | Moving target tracking system based on wireless sensor network |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2020161075A1 (en) * | 2019-02-04 | 2020-08-13 | Ams International Ag | Proximity sensing based on ratio change detection |
| US11821984B2 (en) | 2019-02-04 | 2023-11-21 | Ams International Ag | Proximity sensor based on ratio change detection |
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