WO2010146950A1 - Dispositif de détection de position de point lumineux - Google Patents

Dispositif de détection de position de point lumineux Download PDF

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Publication number
WO2010146950A1
WO2010146950A1 PCT/JP2010/058009 JP2010058009W WO2010146950A1 WO 2010146950 A1 WO2010146950 A1 WO 2010146950A1 JP 2010058009 W JP2010058009 W JP 2010058009W WO 2010146950 A1 WO2010146950 A1 WO 2010146950A1
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WIPO (PCT)
Prior art keywords
light
spot
light receiving
screen
receiving element
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Ceased
Application number
PCT/JP2010/058009
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English (en)
Japanese (ja)
Inventor
伊作 永井
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Okayama University NUC
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Okayama University NUC
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Priority to JP2011519684A priority Critical patent/JP5429897B2/ja
Publication of WO2010146950A1 publication Critical patent/WO2010146950A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/16—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using electromagnetic waves other than radio waves
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/0304—Detection arrangements using opto-electronic means
    • G06F3/0325—Detection arrangements using opto-electronic means using a plurality of light emitters or reflectors or a plurality of detectors forming a reference frame from which to derive the orientation of the object, e.g. by triangulation or on the basis of reference deformation in the picked up image
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • G01J1/4257—Photometry, e.g. photographic exposure meter using electric radiation detectors applied to monitoring the characteristics of a beam, e.g. laser beam, headlamp beam
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
    • G01S11/12—Systems for determining distance or velocity not using reflection or reradiation using electromagnetic waves other than radio waves

Definitions

  • the present invention relates to a light spot position detection device that detects the position of a light spot displayed on a screen by spot light irradiated from a light source toward the screen.
  • a detection device using a laser beam may be used for detecting a vibration state or a bending state of a bridge or detecting a displacement state of a slope such as a cliff.
  • laser light is spot light
  • a light spot appears when the subject is irradiated with laser light.
  • PSD Position Sensitive Device
  • a photodiode, a phototransistor, or the like is used to detect a change in the position of a light spot.
  • Detectors arranged in a grid pattern are used (for example, see Patent Document 2), or image processing is performed after taking a light spot with an imaging device such as a camera.
  • the PSD it is difficult for the PSD to increase the area of the laser light receiving portion where the light spot is displayed, and it cannot be used in a very bright place such as outdoors, or readjustment is necessary. There was a problem that.
  • optical sensors are easily affected by incident angle characteristics, and are difficult to use in environments where the brightness varies greatly, such as outdoors, and when a light spot is located between adjacent optical sensors. Therefore, it is difficult to detect correctly, and since the resolution depends on the size of the optical sensor, it is difficult to increase the resolution, and the performance is not sufficient.
  • the imaging device captures the light spot, it is often difficult to optimize the shooting conditions in extremely bright places such as outdoors or where the brightness changes, and the usage environment is limited. There was a problem of being.
  • the present inventor has conducted research and development to provide a light spot position detecting device that is relatively inexpensive and hardly affected by the environment, and has achieved the present invention. .
  • the light spot position detection device of the present invention includes a light source for irradiating spot light, and detection means for receiving the spot light emitted from the light source by the screen and detecting the position of the light spot by the spot light appearing on the screen.
  • a light spot position detecting device having a light receiving device, wherein the screen is made of a diffuse transmission material, and the detecting means includes a plurality of light receiving elements provided on the back side of the screen, and output signals from these light receiving elements.
  • an analysis unit for analyzing the above.
  • the light spot position detecting device of the present invention is also characterized by the following points.
  • the light source irradiates the spot light as pulses.
  • the light source includes a control unit that adjusts the duty ratio of the pulsed spot light and transmits a predetermined signal, and the analysis unit of the detection unit transmits the signal by reading the signal from the spot light.
  • the central axis at which the light incident angle of the light receiving element is 0 degrees is orthogonal to the screen, and a shield is provided on the central axis.
  • the light receiving element is provided in a box-shaped housing on which a screen is stretched, and an illuminator that makes the inside of the housing have a predetermined brightness is provided in the housing.
  • a light source that irradiates spot light
  • a light receiver that includes spot light irradiated from the light source, and a detector that detects a position of a light spot by the spot light that appears on the screen
  • the screen Since the screen is made of a diffuse transmission material, it can be made less susceptible to environmental influences such as direct sunlight.
  • the detection means is composed of a plurality of light receiving elements provided on the back side of the screen and an analysis unit for analyzing the output signal from each of these light receiving elements.
  • the number can be set to 4 and at most 10 or less, and the detection means can be configured with a small number of light receiving elements, so that the cost can be extremely low.
  • the detection means detects the position of the light spot appearing on the screen by analyzing the output signal from each light receiving element in the analysis unit, the resolution can be increased.
  • the light spot position detection device of the present invention includes a light source for irradiating spot light, and detection means for receiving the spot light emitted from the light source on the screen and detecting the position of the light spot by the spot light appearing on the screen. It consists of a receiver.
  • a spot is emitted from the light source to generate a light spot on the screen of the light receiver, and the resolution is lowered by detecting the position of this light spot by the detector of the light receiver. It is possible to detect.
  • the detection means is composed of a plurality of light receiving elements provided on the back side of the screen and an analysis unit for analyzing the output signal from each of the light receiving elements, so that it is not easily affected by the environment such as direct sunlight.
  • the position of the light spot can be detected with a relatively small number of light receiving elements.
  • the position of the light spot can be detected by at least three, preferably four light receiving elements.
  • the detection range of the position of the light spot can be set to a desired detection range by adjusting the size of the screen, and the desired detection accuracy can be obtained by appropriately arranging the light receiving elements according to the size of the screen. Can be obtained.
  • the screen is not limited to a flat shape, and may be a spherical shape, for example, and can have an appropriate shape.
  • the light receiving element may be provided in a box-shaped housing on which a screen is stretched, and an illuminator having a predetermined brightness in the housing may be provided in the housing. That is, in general, the detection means of the light receiver is very inferior in sensitivity to illuminance below a certain level, and there is a risk that the detection accuracy of the position of the light spot may be lowered. By setting the brightness to a predetermined level, it is possible to increase the detection accuracy of the position of the light spot by setting the detection means to a state with high detection sensitivity.
  • the light source does not necessarily have to be in an on state in which spot light is always irradiated, and may be irradiated in a so-called pulse shape that alternately repeats an on state in which spot light is irradiated and an off state in which spot light is not irradiated. Good.
  • the amount of light detected by each light receiving element in the off state of the spot light is set as the amount of background light, and from the amount of light detected by each light receiving element in the on state of the spot light, the background By subtracting the amount of light, it is possible to easily eliminate the influence of background light and to make it less susceptible to environmental influences such as direct sunlight.
  • a predetermined signal can be transmitted and a communication function can be provided.
  • the light spot position detecting device receives a light source 10 that irradiates a spot light L, a spot light L emitted from the light source 10 by a screen 25, and a spot light L that appears on the screen 25.
  • the light receiving device 20 is provided with detection means for detecting the position of the light spot.
  • Any light source device may be used as the light source 10 as long as it can irradiate light with high convergence.
  • a light source device that irradiates laser light is suitable, and a laser light source is also used in this embodiment.
  • the light source 10 emits light in a so-called pulse shape that alternately repeats an on state in which spot light is irradiated and an off state in which spot light is not irradiated.
  • the background light component can be easily removed in the light receiver 20 and the detection accuracy of the light spot is improved.
  • the frequency of the spot light may be an appropriate frequency that is not easily affected by the background light.In the case of this embodiment, the frequency was originally set to 520 Hz. I was able to eliminate the effect.
  • the light receiver 20 includes a rectangular housing 26, a screen 25 mounted in an opening 26 a provided on one surface of the housing 26, and first to fourth light receiving elements 21, 22, 23, mounted in the housing 26. 24 and an analyzer 27 for analyzing the signals output from the first to fourth light receiving elements 21, 22, 23, 24.
  • the housing 26 is not limited to a rectangular shape, and may have an appropriate shape. In this embodiment, since it is easy to manufacture, it is a rectangular body. In this embodiment, as will be described later, since the housing 26 is also used as a support for the screen 25 and the first to fourth light receiving elements 21, 22, 23, 24, a material having a certain degree of rigidity is used. 25 and the first to fourth light receiving elements 21, 22, 23, 24 can be stably fixed and supported. In the present embodiment, the fourth light receiving element 24 is provided at a diagonal position in the rectangular housing 26 with respect to the first light receiving element 21, and the second light receiving element 22 and the third light receiving element 22 are provided at the remaining two corners. A light receiving element 23 is provided.
  • the opening 26 a provided in the housing 26 is provided in a rectangular shape on one of the six surfaces of the housing 26.
  • the opening shape of the opening 26a is not limited to a rectangular shape, and may be an appropriate shape in consideration of the variation state of the position of the detected light spot.
  • a frame-shaped outer edge 26b is formed along the periphery of the opening 26a along with the formation of the opening 26a. It has become.
  • the sheet-like screen 25 is disposed in the housing 26 so as to close the opening 26a, and the outer peripheral edge of the screen 25 is overlaid on the outer edge 26b of the housing 26 and bonded using an adhesive or the like.
  • the screen 25 is made of a diffuse transmission material.
  • the screen 25 is a plastic plate.
  • the screen 25 is red in order to easily generate a clear light spot by the spot light L emitted from the light source 10. Any screen 25 may be used as long as a clear light spot can be generated by the spot light L emitted from the light source 10.
  • the first to fourth light receiving elements 21, 22, 23, and 24 are phototransistors of the same model number, and are fixedly attached to the four corners of a rectangular housing 26, respectively.
  • the first to fourth light receiving elements 21, 22, 23, and 24 are provided toward the screen 25 with the central axis S having a light incident angle of 0 degrees orthogonal to the screen 25, and the central axis A shield is provided on S.
  • a general phototransistor can output a voltage that is almost directly proportional to the amount of received light, but has a directivity characteristic, and therefore, as shown in FIG. On the other hand, the output voltage is reduced. Further, when the center axis S of the phototransistor is orthogonal to the screen 25 as in the present embodiment, the distance between the light spot and the phototransistor increases as the position of the light spot moves away from the center axis S. The increase in the output voltage also causes a decrease in the output voltage with respect to the light spot at a position away from the central axis S.
  • a shield is provided on the central axis S of the first to fourth light receiving elements 21, 22, 23, 24 to suppress light reception in a region where the detection accuracy is lowered, and the output voltage with respect to the position variation of the light spot.
  • the first to fourth light receiving elements 21, 22, 23, 24 are mounted on the housing 26 with the central axis S orthogonal to the outer edge portion 26b of the housing 26, whereby the outer edge portion 26b of the housing 26 is shielded. Further, intervals between the light receiving elements 21, 22, 23, 24 are set.
  • the first to fourth light receiving elements 21, 22, 23, 24 can be mounted while being securely fixed by being mounted at the four corners of the housing 26, and the optical axis is attached to the outer edge portion 26 b of the housing 26. It is easy to make it orthogonal.
  • a light-shielding sheet may be disposed on the central axis S of the first to fourth light receiving elements 21, 22, 23, 24.
  • the analysis device 27 that analyzes the signals output from the first to fourth light receiving elements 21, 22, 23, and 24 is a personal computer in which a predetermined analysis program is installed.
  • a signal input to the personal computer is A / D converted and amplified by a predetermined signal adjustment circuit (not shown).
  • FIG. 3 is a schematic circuit diagram of the signal adjustment circuit of the present embodiment, in which the output voltage of the phototransistor PT is amplified by the operational amplifier OP and output.
  • An AC coupling capacitor C is provided between the phototransistor PT and the operational amplifier OP, and only the AC component of the signal output in an AC shape from the phototransistor PT is converted into spot light by making the spot light into a pulse shape. As a signal based on. Thereby, the background light component contained in the signal output from the phototransistor PT can be removed.
  • a first variable resistor VR1 for offset adjustment is connected to the positive input terminal of the operational amplifier OP, and the offset voltage of the signal output from the operational amplifier OP, that is, the minimum voltage in the output pulse-shaped signal, The magnitude of the voltage that is the middle of the maximum voltage can be adjusted. Therefore, the influence of background light can be easily eliminated, and it can be used in various environments.
  • the output voltage of the phototransistor PT detected in the off state where no spot light is irradiated is the photovoltage detected in the on state where the spot light is irradiated as the output voltage caused by the background light.
  • the influence of background light can also be removed by subtracting from the output voltage of the transistor PT.
  • R1 is a first resistor connected in series to the phototransistor PT
  • R2 and VR2 are a second resistor and a second variable resistor that adjust the output of the operational amplifier OP.
  • the second variable resistor VR2 By adjusting the second variable resistor VR2, the amplitude of the signal output from the operational amplifier OP can be adjusted, and can be adjusted to a signal suitable for signal analysis in the analysis device 27.
  • the signal adjustment circuit is not limited to the form shown in FIG. 3 and can have an appropriate circuit configuration.
  • the signal adjustment circuit shown in FIG. 3 is a non-inverting amplifier circuit using the operational amplifier OP, but may be a signal adjustment circuit including an inverting amplifier circuit as shown in FIG.
  • the output voltage of the phototransistor PT ′ is amplified by the operational amplifier OP ′, and an AC coupling capacitor C1 ′ is provided between the phototransistor PT ′ and the operational amplifier OP ′.
  • R1 ′ is a first resistor connected in series to the phototransistor PT ′
  • R2 ′ and R3 ′ are a second resistor and a second variable resistor that adjust the output of the operational amplifier OP ′.
  • a fourth resistor R4 'and a fifth resistor value R5' having the same resistance value connected in series between the power supply voltage and the ground voltage are provided, and this fourth resistor R4 is provided.
  • Vcc / 2 [V] is input to the operational amplifier OP ′ by connecting the “+” and the fifth resistance value R5 ′ to the positive input terminal of the operational amplifier OP ′.
  • the center of the amplitude of the output signal of the phototransistor PT ′ having an AC shape can be easily adjusted to Vcc / 2 [V], and adjustment of the offset voltage by the first variable resistor VR1 is unnecessary. be able to.
  • C2 ′ is a stabilization capacitor provided to suppress fluctuations in the voltage input to the positive input terminal of the operational amplifier OP ′.
  • the thickness of the screen 25 and the resistance values of the first resistors R1 and R1 ′ are appropriately adjusted according to the illuminance of the light source 10, the illuminance of the background light, or the distance from the light source 10 to the screen 25 of the light receiver 20. By doing so, the output signals of the phototransistors PT and PT ′ can be effectively amplified by the signal adjustment circuit.
  • an output voltage of a signal output from the first to fourth light receiving elements 21, 22, 23, 24 is analyzed by the analyzing device 27. 2 is specified, and the distance from each light receiving element 21, 22, 23, 24 to the light spot is specified based on the output characteristic curve of FIG. Is drawn in each of the light receiving elements 21, 22, 23, and 24, and the position of the light spot can theoretically be specified as the position of the intersection of the four virtual circles.
  • the four virtual circles do not intersect at a single point due to the effects of various errors, especially when the illuminance of the light source fluctuates.
  • the output voltage of the signal fluctuates, so that it may be recognized that the position of the light spot fluctuates.
  • the output voltage of the signal output from each of the light receiving elements 21, 22, 23, 24 is in a state multiplied by a substantially equivalent rate of change, Multiply the output voltage of each light receiving element 21, 22, 23, 24 by the rate of change k, and specify the rate of change k where the four virtual circles intersect at one point while changing the value of the rate of change k, and determine the position of the light spot Can be identified.
  • the virtual circle s1 centered on the first light receiving element 21 is used.
  • a fourth intersection point p4 that is an intersection point of the virtual circle s3 centering on 23 and the virtual circle s4 centering on the fourth light receiving element 24 is specified.
  • the first to fourth intersections p1, p2, p3, p4 are identified using the specified value of the change rate k, and the average value of the coordinates of the identified first to fourth intersections p1, p2, p3, p4 is determined.
  • the specified coordinates are used as the position of the intersection.
  • the position where the light receiving elements are internally divided by the radius ratio of the virtual circle Coordinates may be used as intersections and positions, or intersections may always exist by multiplying in advance by the value of the rate of change k where k> 1.
  • the coordinates of the intersection may be specified using the ratio of the output voltages of the signals output from the light receiving elements 21, 22, 23, and 24, respectively.
  • the opening 26a provided in the housing 26 has a square shape of 6 cm square, and a 5 cm square detection similar to the opening 26a with the center of the opening 26a as the center.
  • An area is assumed, and as shown in FIG. 6, measurement points t are set in the detection area in a grid of 5 mm intervals, and output voltage data of each measurement point t in total 121 points are measured in advance.
  • the output voltage value of the first light receiving element 21 at each measurement point t is v1
  • the output voltage value of the second light receiving element 22 is v2
  • the output voltage value of the third light receiving element 23 is v3
  • the fourth light receiving element 24 The output voltage value is represented as v4.
  • the interval between the measurement points is not limited to 5 mm, and may be an arbitrary interval, and the detection area may be larger than 5 cm square.
  • the first to fourth light receiving elements 21, 22, 23, and 24 are arranged at the apexes of a 7 cm square having a shape similar to the opening 26a with the center of the opening 26a as the center.
  • reference data rv1, rv2, rv3, rv4, which are ratios of output voltages, are specified from the output voltage values v1, v2, v3, v4 of the respective light receiving elements 21, 22, 23, 24 by the following expression.
  • rv1 v1 / (v1 + v2 + v3 + v4)
  • rv2 v2 / (v1 + v2 + v3 + v4)
  • rv3 v3 / (v1 + v2 + v3 + v4)
  • rv4 v4 / (v1 + v2 + v3 + v4).
  • the reference data rv1, rv2, rv3, rv4 are provided in the analysis device 27 in advance as a database, and the signals output from the first to fourth light receiving elements 21, 22, 23, 24 are used when detecting the position of the light spot.
  • the output voltage ratio data rv1 ′, rv2 ′, rv3 ′, and rv4 ′ are specified by performing the same calculation as the above-described expression using the output voltage value.
  • D
  • the measurement point t having the minimum value of D is specified as follows, and the specified measurement point t is set as the position of the light spot.
  • the lattice point that is generated and minimizes the value of the SAD correlation D with respect to this reference data is set as the position of the light spot. Therefore, the resolution of the position of the light spot can be set to 0.5 mm.
  • the light receiver 20 of the present embodiment does not need to face the light source 10, and the spot light may be incident on the screen 25 from a predetermined angle other than 90 °.
  • the receiver 20 can be any distance from the light source 10 as long as a point can be generated.
  • the spot light is pulsed, but the light source 10 is provided with adjusting means for adjusting the duty ratio by pulse-modulating the spot light to be irradiated in a pulse shape, not only in a pulse shape, You may adjust suitably the time interval of the ON state which irradiates spot light, or the time interval of the OFF state which does not irradiate spot light.
  • the analyzer 27 of the light receiver 20 outputs the output voltage of the signal output from each of the light receiving elements 21, 22, 23, and 24, respectively.
  • binary data can be transmitted and received by serial communication by identifying the first irradiation pattern and the second irradiation pattern.
  • the analysis device 27 of the light receiver 20 identifies the first irradiation pattern as “1” data and the second irradiation pattern as “0” data, or vice versa.
  • binary data identification is not performed based only on the difference in duty ratio, but serial communication may be performed using the variation in illuminance by adjusting the illuminance of the spot light.
  • a timing generation circuit or the like generally used for generating a predetermined timing signal can be used, and the timing generation circuit based on separately input data And the like, and a desired spot light can be emitted from the light source 10 based on the control signal.
  • an illuminator 28 having a predetermined brightness is provided inside a box-shaped housing 26 on which a screen 25 is stretched. Also good.
  • the illuminator 28 includes four light emitting diodes of first to fourth light emitting diodes 28-1, 28-2, 28-3, 28-4, and the first to fourth light emitting diodes 28- 1, 28-2, 28-3, and 28-4 are provided in the central portion of the housing 26, and the first light emitting diode 28-1 is disposed toward the first light receiving element 21, and the second light emitting diode 28-2 is provided. Is disposed toward the second light receiving element 22, the third light emitting diode 28-3 is disposed toward the third light receiving element 23, and the fourth light emitting diode 28-4 is disposed toward the fourth light receiving element 24. Has been established.
  • first to fourth light emitting diodes 28-1, 28-2, 28-3, 28-4 are disposed closer to the screen 25 than the first to fourth light receiving elements 21, 22, 23, 24.
  • the 1 to 4 light receiving elements 21, 22, 23, 24 can be effectively illuminated.
  • the light receiver 20 is installed and used in a relatively dark environment such as at night or in a tunnel. Even in this case, sufficient accuracy can be maintained with respect to the detection of the position of the light spot.
  • the first to fourth light receiving elements 21, 22, 23, and 24 generally have extremely low sensitivity to illuminance below a certain level, and the linearity of the amount of change in output voltage with respect to illuminance change is poor.
  • the detection accuracy of the position of the point may be lowered, by illuminating the first to fourth light receiving elements 21, 22, 23, and 24 with the illuminator 28, the amount of change in the output voltage with respect to the change in illuminance can be reduced.
  • the position of the light spot can be detected using a region with good linearity, and the detection accuracy can be improved.
  • the illuminator 28 uses the first to fourth light emitting diodes 28-1, 28-2, 28-3, 28-4, but the first to fourth light receiving elements 21, 22, 23,
  • the illuminator 28 can be anything as long as the response characteristics of 24 can be improved.
  • the first to fourth light receiving elements 21, 22, 23, and 24 are provided in the rectangular housing 26, and the rectangular detection region is provided.
  • the present invention is not limited to this embodiment. Instead, as shown in FIG. 8, a rectangular-shaped housing 40 extending in one direction is provided with a screen 41 in the form of a narrow band, and a first light receiving element 42 and a second light receiving element are disposed at both ends of the housing 40 in the longitudinal direction.
  • the element 43 may be provided to have a linear detection region.
  • a triangular screen 51 is provided on one surface of a triangular prism-shaped housing 50, and a first light receiving element 52 and a second light receiving element 53 are provided at three corners of the other surface.
  • a third light receiving element 54 may be provided so as to have a triangular detection region, or a hexagonal screen 61 is provided on one surface of a hexagonal columnar housing 60 as shown in FIG.
  • the first light receiving element 62, the second light receiving element 63, the third light receiving element 64, the fourth light receiving element 65, and the fifth light receiving element 66 are provided at the six corners of the other surface.
  • a sixth light receiving element 67 may be provided to have a hexagonal detection region.
  • a circumferential screen 71 is provided on the peripheral surface portion of the cylindrical housing 70, and a first light receiving element 72 is provided on one end surface portion of the cylindrical housing 70.
  • a second light receiving element 73 is provided on the other end surface portion of the cylindrical housing 70, and in particular, the first light receiving element 72 and the second light receiving element 73 are provided to face each other to form a circumferential surface. You may make it have this detection area
  • a spherical screen 81 is provided at the top of a hemispherical housing 80 having an opening at the top, and a first light receiving element 82 and a first light receiving element 82 are provided at the center of the hemispherical housing 80.
  • the two light receiving elements 83 and the third light receiving element 84 may be arranged with their center axes orthogonal to each other so as to have a spherical detection region.
  • the light spot detection region can be formed in an appropriate shape as necessary, and the light receiving elements may be appropriately arranged in accordance with the shape of the detection region.
  • the light spot position detection apparatus configured in this way can be used for displacement measurement of structures such as bridges, deformation detection of slopes such as cliffs, etc., as schematically shown in FIG.
  • the first light source 93a is provided at a predetermined position of the bridge portion 90 laid between the first pier 91 and the second pier 92.
  • the first light receiver 93b is provided at a position separated by a predetermined distance from the first light source 93a
  • the second light source 94a is provided in the vicinity of the first light receiver 93b
  • the second light source 94a is provided.
  • the second light receiver 94b is provided at a position separated from the third light source 94b by a predetermined distance, and a third light source 95a is provided in the vicinity of the second light receiver 94b, and the third light source 95a is spaced from the third light source 95a by a predetermined distance. Is provided with a third light receiver 95b.
  • first light source 93a, the second light source 94a, and the third light source 95a are each provided with adjusting means for adjusting the duty ratio by pulse-modulating the spot light to be irradiated.
  • the light receiver 93b, the second light receiver 94b, and the third light receiver 95b are provided with an analysis unit that reads binary data from the pulsed spot light emitted from the light sources 93a, 94a, and 95a. ing.
  • the 1st light receiver 93b and the 2nd light source 94a are connected by the 1st connection wiring 96, the signal output from the 1st light receiver 93b is input into the 2nd light receiver 94b, The output signal of the first light receiver 93b can be transmitted to the second light receiver 94b.
  • the second light receiver 94b and the third light source 95a are connected by the second connection wiring 97, and the signal output from the second light receiver 94b is input to the third light receiver 95b.
  • the output signal of the first light receiver 93b and the output signal of the second light receiver 94b are transmitted to the third light receiver 95b, and the output signal of each of the light receivers 93b, 94b, 95b is transmitted from the third light receiver 95b. So that you can get.
  • the light spot position detection device of the present invention can be used not only for detecting changes in a structure but also for a shooting game using a model gun capable of irradiating laser light, or a patent. It can be used as a light receiving unit when guiding a moving object using laser light as described in Document 2.

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  • Length Measuring Devices By Optical Means (AREA)

Abstract

L'invention porte sur un dispositif de détection de position de point lumineux qui est relativement peu coûteux et qui n'est pas affecté facilement par l'environnement. Le dispositif de détection de position de point lumineux comprend une source de lumière (10) pour émettre une lumière de point (L), et un récepteur de lumière (20) qui comporte un moyen de détection qui reçoit la lumière de point (L) émise par la source de lumière (10) sur un écran (25) et qui détecte la position du point lumineux à l'aide de la lumière de point (L) apparaissant sur l'écran (25). L'écran (25) est construit à partir d'un matériau transparent diffus. Le moyen de détection comporte une pluralité d'éléments photorécepteurs (21, 22, 23, 24) disposés derrière l'écran (25) et une unité d'analyse pour analyser les signaux de sortie provenant des éléments photorécepteurs (21, 22, 23, 24).
PCT/JP2010/058009 2009-06-15 2010-05-12 Dispositif de détection de position de point lumineux Ceased WO2010146950A1 (fr)

Priority Applications (1)

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JP2011519684A JP5429897B2 (ja) 2009-06-15 2010-05-12 光点位置検出装置

Applications Claiming Priority (4)

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JP2009-142649 2009-06-15
JP2009142649 2009-06-15
JP2009243456 2009-10-22
JP2009-243456 2009-10-22

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WO2010146950A1 true WO2010146950A1 (fr) 2010-12-23

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JP (1) JP5429897B2 (fr)
WO (1) WO2010146950A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2022172608A1 (fr) * 2021-02-12 2022-08-18

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49135495A (fr) * 1973-05-02 1974-12-26
JPS59214704A (ja) * 1983-05-21 1984-12-04 Mc Kk レ−ザ−を用いた自動測量装置
JPH0618217A (ja) * 1992-06-29 1994-01-25 Akitsugu Fujieda 広範囲位置ディテクター
JP2001514736A (ja) * 1996-01-23 2001-09-11 アドバンスト・オプティカル・テクノロジーズ・リミテッド・ライアビリティ・カンパニー 四分円光検出器
JP2008541108A (ja) * 2005-05-18 2008-11-20 ライカ ジオシステムズ アクチェンゲゼルシャフト 受信ユニットの位置を決定する方法とシステム

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61233303A (ja) * 1985-04-09 1986-10-17 Nissan Motor Co Ltd 被検知点の検知システム

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49135495A (fr) * 1973-05-02 1974-12-26
JPS59214704A (ja) * 1983-05-21 1984-12-04 Mc Kk レ−ザ−を用いた自動測量装置
JPH0618217A (ja) * 1992-06-29 1994-01-25 Akitsugu Fujieda 広範囲位置ディテクター
JP2001514736A (ja) * 1996-01-23 2001-09-11 アドバンスト・オプティカル・テクノロジーズ・リミテッド・ライアビリティ・カンパニー 四分円光検出器
JP2008541108A (ja) * 2005-05-18 2008-11-20 ライカ ジオシステムズ アクチェンゲゼルシャフト 受信ユニットの位置を決定する方法とシステム

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2022172608A1 (fr) * 2021-02-12 2022-08-18
WO2022172608A1 (fr) * 2021-02-12 2022-08-18 パナソニックＩｐマネジメント株式会社 Dispositif optique

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JP5429897B2 (ja) 2014-02-26
JPWO2010146950A1 (ja) 2012-12-06

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