CN112731417B - Distance measuring device, electronic equipment and measuring method - Google Patents
Distance measuring device, electronic equipment and measuring method Download PDFInfo
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- CN112731417B CN112731417B CN202011509106.6A CN202011509106A CN112731417B CN 112731417 B CN112731417 B CN 112731417B CN 202011509106 A CN202011509106 A CN 202011509106A CN 112731417 B CN112731417 B CN 112731417B
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000005259 measurement Methods 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Classifications
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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
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
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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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
Abstract
The application discloses a distance measuring device, electronic equipment and a measuring method, and belongs to the technical field of photoelectric measurement. The distance measuring device includes: the first shell is provided with a first opening; the light emitting unit, the collimating lens, the first reflecting unit, the second reflecting unit, the condensing lens, the light receiving unit and the processing unit are arranged in the first shell; the first reflection unit is used for reflecting to obtain first light and second light, the first light irradiates the condensing lens, and the second light irradiates the second reflection unit; the second reflecting unit is used for reflecting second light rays, and the reflected second light rays are emitted to the measured object through the first opening; the light receiving unit is used for receiving the first light rays condensed by the condensing lens and the second light rays reflected by the object to be detected, reflected by the second reflecting unit and the first reflecting unit in sequence and condensed by the condensing lens. The distance measuring device can improve the measuring accuracy of the distance between the measured object and the distance measuring device.
Description
Technical Field
The application belongs to the technical field of photoelectric measurement, and particularly relates to a distance measuring device, electronic equipment and a measuring method.
Background
Currently, a laser ranging apparatus generally includes a laser emitting unit, a reference reflecting surface, a laser receiving unit, and a processing unit. The light generated by the laser emission unit is emitted to the reference reflection surface through the collimating lens, the first part of laser is reflected to the laser receiving unit through the reference reflection surface, the second part of laser is emitted to the measured object through the reference reflection surface, the measured object is reflected to the laser receiving unit, the processing unit obtains the time t1 of the first part of laser reflected back through the reference reflection surface and the time t2 of the second part of laser reflected back through the measured object, and the distance between the measured object and the distance measuring device is calculated based on t1 and t2. However, when the laser ranging device is used to measure the distance between the measured object and the ranging device, if the measured object is close to the ranging device, t1 and t2 are very close, which easily results in lower accuracy of measuring the distance between the measured object and the ranging device.
Disclosure of Invention
The embodiment of the application aims to provide a distance measuring device, electronic equipment and a measuring method, which can solve the problem that the measuring accuracy of the distance between a measured object and the distance measuring device is low.
In order to solve the technical problems, the application is realized as follows:
in a first aspect, embodiments of the present application provide a ranging apparatus, the ranging apparatus comprising: a first housing provided with a first opening; the light emitting unit, the collimating lens, the first reflecting unit, the second reflecting unit, the condensing lens, the light receiving unit and the processing unit are arranged in the first shell;
the light emitting unit is used for generating light rays, and the light rays generated by the light emitting unit are emitted to the first reflecting unit after being collimated by the collimating lens;
the first reflecting unit is used for reflecting to obtain first light and second light, the first light irradiates the condensing lens, and the second light irradiates the second reflecting unit;
the second reflecting unit is used for reflecting the second light, and the reflected second light is emitted to the measured object through the first opening;
the light receiving unit is used for receiving the first light rays condensed by the condensing lens, the second light rays reflected by the measured object and then reflected by the second reflecting unit and the first reflecting unit in sequence and condensed by the condensing lens, and recording a first time t1 for receiving the first light rays and a second time t2 for receiving the second light rays;
the processing unit is connected with the light receiving unit and is used for calculating the relative distance between the measured object and the distance measuring device according to t1 and t2.
In a second aspect, an embodiment of the present application provides an electronic device, including: a second housing provided with a second opening; a distance measuring device according to the first aspect disposed within the second housing; wherein the first opening is disposed opposite to the second opening.
In a third aspect, an embodiment of the present application provides a ranging method, which is performed by a target device, where the target device is a ranging apparatus according to the first aspect, or is performed by an electronic device according to the second aspect, and the method includes:
controlling the light emitting unit to emit light, wherein the light is reflected by the first reflecting unit to obtain first light and second light;
acquiring a first time t1 when the light receiving unit receives the first light ray and a second time t2 when the light receiving unit receives the second light ray;
and calculating the relative distance between the measured object and the distance measuring device according to the t1 and the t2.
In an embodiment of the present application, a ranging apparatus includes: a first housing provided with a first opening; the light emitting unit, the collimating lens, the first reflecting unit, the second reflecting unit, the condensing lens, the light receiving unit and the processing unit are arranged in the first shell. The light generated by the light emitting unit is emitted to the first reflecting unit after being collimated by the collimating lens, one part of the light is directly reflected back to the light receiving unit by the first reflecting unit, the other part of the light is reflected to the second reflecting unit by the first reflecting unit, then is reflected to the measured object by the second reflecting unit, and is reflected back to the light receiving unit by the measured object, the second reflecting unit and the first reflecting unit in sequence. Therefore, in the embodiment of the application, since the distance between the measured object and the first reflecting unit is increased, even if the measured object is closer to the distance measuring device, the time when the light receiving unit receives the light reflected by the measured object can be clearly distinguished from the time when the light reflected by the first reflecting surface is received, so that the accuracy of measuring the distance between the measured object and the distance measuring device can be improved.
Drawings
FIG. 1 is one of the schematic diagrams of a distance measuring device provided in an embodiment of the present application;
FIG. 2 is a schematic diagram of a distance measuring device according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of an electronic device provided in an embodiment of the present application;
fig. 4 is a schematic diagram of a measurement method provided in an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
The terms first, second and the like in the description and in the claims, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged, as appropriate, such that embodiments of the present application may be implemented in sequences other than those illustrated or described herein, and that the objects identified by "first," "second," etc. are generally of a type and not limited to the number of objects, e.g., the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.
The embodiments of the present application will be described in detail below with reference to the accompanying drawings by means of specific embodiments and application scenarios thereof.
As shown in fig. 1, the ranging apparatus of the embodiment of the present application may include:
a first housing 11, wherein a first opening 110 is arranged on the first housing 11;
a light emitting unit 12, a collimator lens 13, a first reflecting unit 14, a second reflecting unit 15, a condensing lens 16, a light receiving unit 17, and a processing unit 18, which are provided in the first housing 11.
The light emitting unit 12 is used for generating light, and the light generated by the light emitting unit 12 is emitted and collimated by the collimating lens 13 and then emitted to the first reflecting unit 14; the first reflecting unit 14 is used for reflecting and obtaining a first light ray and a second light ray, the first light ray is directed to the condensing lens 16, and the second light ray is directed to the second reflecting unit 15; the second reflecting unit 15 is used for reflecting the second light, and the reflected second light is emitted to the measured object through the first opening; the light receiving unit 17 is configured to receive the first light beam condensed by the condensing lens 16, and the second light beam reflected by the object to be measured and then reflected by the second reflecting unit 15 and the first reflecting unit 14 in sequence, and condensed by the condensing lens 16, and record a first time t1 of receiving the first light beam, and a second time t2 of receiving the second light beam.
For convenience of understanding, in fig. 1, the transmission paths of the first light are identified by solid lines, and the transmission paths of the first light are in sequence: first reflection unit→light receiving unit. The transmission path of the second light is marked by a dotted line, and the transmission path of the second light is sequentially as follows: first reflecting unit, second reflecting unit, measured object, second reflecting unit, first reflecting unit and light receiving unit. It can be seen that, in the embodiment of the present application, the light generated by the light emitting unit 12 is transmitted to the light receiving unit 17 through two transmission paths after being transmitted to the first reflecting unit 14, and the distances between the two transmission paths are greatly different. In this way, t1 and t2 recorded by the light receiving unit 17 differ greatly, and can be clearly distinguished.
And the processing unit 18 is connected with the light receiving unit 17 and is used for calculating the relative distance between the measured object and the distance measuring device according to t1 and t2.
Optionally, the calculating the relative distance L1 between the measured object and the ranging device according to the t1 and the t2 specifically includes: and calculating the relative distance L1 between the measured object and the distance measuring device according to L1= (t 2-t 1) multiplied by the light speed/2-L1-L2, wherein L1 is the distance value between the first reflecting unit and the second reflecting unit, and L2 is the distance value between the second reflecting unit and the first opening.
In the embodiment of the present application, the setting positions of the light emitting unit 12, the collimator lens 13, the first reflecting unit 14, the second reflecting unit 15, the condensing lens 16, the light receiving unit 17, and the processing unit 18 are fixed, and therefore, the processing unit 18 can acquire l1 and l2 in advance. Thus, after receiving t1 and t2 transmitted from the light receiving unit 12, L1 can be calculated in the above-described manner to obtain the distance between the object to be measured and the distance measuring device.
In other embodiments, the corresponding relationship between t1, t2 and L may be stored in the processing unit 18 in advance, and in this embodiment, when the processing unit 18 obtains the corresponding relationship between t1 and t2, the L corresponding to t1 and t2 may be determined as the relative distance between the measured object and the ranging device by searching for the corresponding relationship.
In addition, as shown in fig. 1, the processing unit 18 may also be connected to the light emitting unit 12 for controlling the light emitting unit 12 to generate light. Thus, the processing unit 18 may be used to both control the emission of light and calculate L, thereby improving the utilization of the device. Of course, it is understood that in other embodiments, the operating state of the light emitting unit 12 may be controlled by other control units, which is not limited in this embodiment.
In practical application, considering that single ranging is more affected by external interference factors, the ranging device can count multiple ranging data through multiple transmission and reception, namely, multiple times t1 and t2 are counted, and the final distance is determined through multiple times of counting data. In this case, t1 for calculating L1 may be an average value of t1 recorded a plurality of times, or t1 corresponding to a peak value of the received positive-going curve of the first light ray; accordingly, t2 used for calculating L1 may be an average value of t2 recorded multiple times, or t2 corresponding to a peak value of the received positive-going curve of the second light ray may be specifically determined according to an actual situation, which is not limited in the embodiment of the present application.
In addition, in the embodiment of the present application, the light generated by the light emitting unit may be laser, infrared light or other light, which may be specifically determined according to practical situations, and the embodiment of the present application is not limited thereto.
The ranging device in the embodiment of the application comprises: a first housing provided with a first opening; the light emitting unit, the collimating lens, the first reflecting unit, the second reflecting unit, the condensing lens, the light receiving unit and the processing unit are arranged in the first shell. The light generated by the light emitting unit is emitted to the first reflecting unit after being collimated by the collimating lens, one part of the light is directly reflected back to the light receiving unit by the first reflecting unit, the other part of the light is reflected to the second reflecting unit by the first reflecting unit, then is reflected to the measured object by the second reflecting unit, and is reflected back to the light receiving unit by the measured object, the second reflecting unit and the first reflecting unit in sequence. Therefore, in the embodiment of the application, since the distance between the measured object and the first reflecting unit is increased, even if the measured object is closer to the distance measuring device, the time when the light receiving unit receives the light reflected by the measured object can be clearly distinguished from the time when the light reflected by the first reflecting surface is received, so that the measurement accuracy of the distance between the measured object and the distance measuring device can be improved.
In the embodiment of the present application, the first reflecting unit 14 may have various forms, which are specifically described as follows:
form one of expression
As shown in fig. 2, the first reflecting unit 14 may include a first reflecting surface 141, a second reflecting surface 142, and a third reflecting surface 143; the first reflecting surface 141 is used for reflecting and obtaining a first light ray, the second reflecting surface 142 is used for reflecting and obtaining a second light ray, and the third reflecting surface 143 is used for reflecting the second light ray reflected by the second reflecting unit 15 to the light receiving unit 17.
In this alternative embodiment, after the light generated by the light emitting unit 12 is collimated by the collimating lens 13, a part of the light may be directed to the first reflecting surface 141 to reflect the first light, and another part of the light may be directed to the second reflecting surface 142 to reflect the second light, where the second light reflected by the object to be measured is reflected by the second reflecting unit 15, and then reflected by the third reflecting surface 143 to the light receiving unit 17.
Since the emission directions of the first light ray reflected by the first reflecting surface 141 and the second light ray reflected by the second reflecting surface 142 are different, it can be understood that the included angle between the first reflecting surface 141 and the horizontal plane is not equal to the included angle between the second reflecting surface 142 and the horizontal plane. In addition, since the third reflecting surface 143 is for reflecting the light received from the second reflecting unit 15 to the light receiving unit 17, and the second reflecting surface 142 is for reflecting the light received from the light emitting unit 12 to the second reflecting unit 15, it can be understood that the angle between the third reflecting surface 143 and the horizontal plane is not equal to the angle between the second reflecting surface 142 and the horizontal plane.
Expression form two
Optionally, the first reflecting unit includes a fourth reflecting surface and a fifth reflecting surface; the fourth reflecting surface is used for reflecting and obtaining first light, the first reflecting unit can rotate and is switched between a first working state and a second working state, the fifth reflecting surface is used for reflecting and obtaining second light in the first working state, and the fifth reflecting surface is used for reflecting the second light reflected by the second reflecting unit to the light receiving unit in the second working state.
In this optional embodiment, the first reflecting unit 14 is controlled to be in the first working state, so that after the light generated by the light emitting unit 12 is collimated by the collimating lens 13, a part of the light can be emitted to the fourth reflecting surface to reflect to obtain the first light, and another part of the light can be emitted to the fifth reflecting surface to reflect to obtain the second light; then, the first reflecting unit 14 is controlled to be in the second working state, so that the second light reflected by the measured object is reflected to the light receiving unit 17 through the fifth reflecting surface after passing through the second reflecting unit 15.
Because the emission directions of the first light ray obtained by reflection of the fourth reflecting surface and the second light ray obtained by reflection of the fifth reflecting surface in the first working state are different, it can be understood that the included angle between the fourth reflecting surface and the horizontal plane is not equal to the included angle between the fifth reflecting surface in the first working state and the horizontal plane. In addition, since the fifth reflecting surface in the first operating state is for reflecting the light received from the light emitting unit 12 to the second reflecting unit 15, and the fifth reflecting surface in the second operating state is for reflecting the light received from the second reflecting unit 15 to the light receiving unit 17, it can be understood that the angle between the fifth reflecting surface in the first operating state and the horizontal plane is not equal to the angle between the fifth reflecting surface in the second operating state and the horizontal plane.
In this alternative embodiment, the first reflecting unit 14 may be connected to the processing unit 18, and the processing unit 18 controls the first reflecting unit 14 to rotate, so as to implement state switching; alternatively, the first reflecting unit 14 may be connected to a driving unit, and the driving unit controls the first reflecting unit 14 to rotate, so as to switch states, which may be specifically determined according to practical situations, which is not limited in the embodiment of the present application.
In this embodiment, optionally, l1 is equal to l3, and l3 is a distance value between the first reflecting unit 14 and the collimating lens 13. In this way, the second reflecting unit 15 and the collimating lens 13 can be symmetrically arranged based on the first reflecting unit 14, so that the determination of the arrangement positions of the units in the ranging device can be simplified, and the manufacturing process of the ranging device can be simplified. Of course, in other alternative embodiments, l1 may be smaller or larger than l3, which may be specifically determined according to practical situations, and the embodiment of the present application is not limited to this.
In an embodiment of the present application, optionally, the distance measuring device may further include a first output unit, where the first output unit is connected to the processing unit 18, and is configured to output L1. Thus, after the processing unit calculates L1, the first output unit can inform the user of the distance between the measured object and the distance measuring device.
In practical applications, the first output unit may include at least one of: a voice output unit such as a speaker or the like; an image output unit such as a display screen or the like.
It should be noted that, in practical application, the ranging device of the embodiment of the present application may be used as an independent device. In addition, considering that the laser focusing technology measures the distance of the measured object by using the Time of Flight (TOF) technology, the distance can be accurately measured in a dark environment, and the laser focusing technology has a plurality of application scenes, so that the user experience and the actual effect of the product can be improved, for example, the laser focusing technology can assist a camera to focus in a low-brightness environment or a low-detail target, and can realize automatic micro-distance mode switching of a camera, and the like. Therefore, the distance measuring device of the embodiment of the application can be installed in the electronic equipment for use. Based on this, the embodiment of the application further provides an electronic device, as shown in fig. 3, including:
a second housing 31, the second housing 31 being provided with a second opening 310;
the ranging device 32 disposed in the second housing 31, it should be noted that the ranging device 32 may be any ranging device provided in the embodiments of the present application.
Wherein the second opening 310 of the housing of the electronic device is arranged opposite to the first opening 110 of the housing of the distance measuring device. In this way, the light emitted from the first opening 110 may be emitted to the measured object through the second opening 310, so as to implement the measurement of the distance between the measured object and the electronic device.
Further, as shown in fig. 3, the second housing 31 is attached to the distance measuring device 32. Therefore, the distance between the measured object and the electronic equipment is the distance between the measured object and the distance measuring device, so that the measuring operation process can be simplified.
Of course, in other embodiments, the second housing 31 and the distance measuring device 32 may be spaced apart, i.e. there may be a space between the first opening 110 and the second opening 310, denoted as L4, in which case the distance between the object to be measured and the electronic device is of the value l2=l1-L4.
The electronic device may be provided with a second output unit, which is connected to the processing unit of the distance measuring device, and is configured to output L2. In practical applications, the second output unit may include at least one of an audio output unit and an image output unit.
In practical applications, the electronic device may be a camera, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted electronic device, a wearable device, a netbook, a personal digital assistant (personal digital assistant, PDA), or the like.
The distance measuring device provided by the embodiment of the application is used for measuring the distance between the measured object and the electronic equipment, so that the accuracy of measuring the distance between the measured object and the electronic equipment can be improved.
In order to facilitate understanding of the measuring process of the distance between the measured object and the electronic device, the following is exemplified by the following that the second housing is attached to the distance measuring device, and the light emitting unit is a laser emitting unit:
the thickness direction of the electronic device is assumed to be the Z direction, the short side direction is the X direction, and the long side direction is the Y direction. Since the Z direction (thickness) is limited, the second reflection unit may be disposed by using the length of the Y direction and the area of the first reflection unit may be increased (the area of the first reflection unit may be increased so that the light may be completely reflected without penetrating the first reflection unit).
After the light emitting unit emits laser, part of the laser is reflected back to the light receiving unit through the first reflecting unit, and the light receiving unit records the time t1 for receiving the laser; the other part is reflected to the second reflecting unit by the first light reflecting unit, passes through the opening of the shell of the electronic equipment and then is emitted to the surface of the object to be measured; after the laser is reflected by the object to be measured, the laser is reflected back to the receiver through the same path as the transmitting light path. The light receiving unit records the time t2 when the laser light is received.
That is, the actual light distance of the first light reflected by the first reflecting unit is: a first reflection unit→a light receiving unit; the actual ray distance of the second ray reflected by the first reflecting unit is as follows: first reflecting unit, second reflecting unit, measured object, second reflecting unit, first reflecting unit and light receiving unit. Therefore, the actual light distance of the first light ray and the actual light distance of the second light ray have larger difference, and the time difference between t2 and t1 is increased by utilizing the inner space of the device, so that the distance measuring device can clearly and respectively obtain the statistical data between the first reflecting surface and the measured object, further determine the actual distance = [ (t 2-t 1) = light speed/2 ] -l1-l2 of the measured object, and improve the measuring accuracy.
The embodiment of the application also provides a ranging method. The ranging method may be performed by a target device, where the target device is a ranging device provided in an embodiment of the present application, or may be specifically determined by an electronic device provided in an embodiment of the present application according to an actual situation, which is not limited in the embodiment of the present application.
As shown in fig. 4, the ranging method may include the steps of:
step 401, controlling the light emitting unit to emit light, wherein the light is reflected by the first reflecting unit to obtain first light and second light;
step 402, obtaining a first moment when the light receiving unit receives the first light ray and a second moment when the light receiving unit receives the second light ray;
and 403, calculating the relative distance between the measured object and the distance measuring device according to the t1 and the t2.
Optionally, the calculating the relative distance between the measured object and the ranging device according to t1 and t2 includes:
and calculating the relative distance L1 between the measured object and the distance measuring device according to L1= (t 2-t 1) multiplied by the light speed/2-L1-L2, wherein L1 is the distance value between the first reflecting unit and the second reflecting unit, and L2 is the distance value between the second reflecting unit and the first opening.
Optionally, in the case that the target device is the electronic device and the second housing is spaced from the ranging device, after calculating the distance value L1 between the measured object and the ranging device, the method further includes:
calculating a distance value L2 between the measured object and the electronic equipment, wherein L2=L1-L4, and L4 is the distance between the first opening and the second opening.
Optionally, after calculating the distance value L1 between the measured object and the distance measuring device, the method further includes:
and outputting a target distance value, wherein the target distance value comprises at least one of L1 and L2.
In a specific implementation, in a case where the target device is a ranging device, the target distance value may be L1; in the case where the target device is an electronic device, the target distance value may be L2.
In addition, in the implementation, the target device may output the target distance value through a voice and/or image output manner, which may be specifically determined according to the actual situation, and the embodiment of the present application is not limited to this.
The implementation principle of the ranging method in the embodiments of the present application may be referred to the foregoing description, and will not be repeated here.
By the mode, the light receiving unit can clearly distinguish the time for receiving the first light ray and the second light ray, so that the distance between the measured object and the distance measuring device or the distance between the measured object and the electronic equipment can be accurately measured.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk), including several instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method described in the embodiments of the present application.
The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are also within the protection of the present application.
Claims (7)
1. A ranging apparatus, comprising: a first housing provided with a first opening; the light emitting unit, the collimating lens, the first reflecting unit, the second reflecting unit, the condensing lens, the light receiving unit and the processing unit are arranged in the first shell;
the light emitting unit is used for generating light rays, and the light rays generated by the light emitting unit are emitted to the first reflecting unit after being collimated by the collimating lens;
the first reflecting unit is used for reflecting to obtain first light and second light, the first light irradiates the condensing lens, and the second light irradiates the second reflecting unit;
the second reflecting unit is used for reflecting the second light, and the reflected second light is emitted to the measured object through the first opening;
the light receiving unit is used for receiving the first light rays condensed by the condensing lens, the second light rays reflected by the measured object and then reflected by the second reflecting unit and the first reflecting unit in sequence and condensed by the condensing lens, and recording a first time t1 for receiving the first light rays and a second time t2 for receiving the second light rays;
the processing unit is connected with the light receiving unit and is used for calculating a distance value L1 between the measured object and the distance measuring device according to t1 and t2;
the calculating the distance value L1 between the measured object and the distance measuring device according to the t1 and the t2 specifically includes: calculating a distance value L1 between the measured object and the distance measuring device according to L1= (t 2-t 1) multiplied by the speed of light/2-L1-L2, wherein L1 is a distance value between the first reflecting unit and the second reflecting unit, and L2 is a distance value between the second reflecting unit and the first opening;
the first reflecting unit comprises a first reflecting surface, a second reflecting surface and a third reflecting surface; the first reflecting surface is used for reflecting to obtain first light, the second reflecting surface is used for reflecting to obtain second light, and the third reflecting surface is used for reflecting the second light reflected by the second reflecting unit to the light receiving unit; or alternatively
The first reflecting unit comprises a fourth reflecting surface and a fifth reflecting surface; the fourth reflecting surface is used for reflecting and obtaining first light, the first reflecting unit can rotate and is switched between a first working state and a second working state, the fifth reflecting surface is used for reflecting and obtaining second light in the first working state, and the fifth reflecting surface is used for reflecting the second light reflected by the second reflecting unit to the light receiving unit in the second working state.
2. The ranging device as recited in claim 1 further comprising a first output unit coupled to the processing unit for outputting L1.
3. An electronic device, the electronic device comprising: a second housing provided with a second opening; the distance measuring device according to any one of claims 1 to 2 disposed within the second housing; wherein the first opening is disposed opposite to the second opening.
4. The electronic device of claim 3, wherein the second housing is positioned in close proximity to the distance measuring device.
5. An electronic device according to claim 3, wherein the second housing is spaced apart from the distance measuring means.
6. A ranging method performed by a target device, the target device being an electronic device as claimed in any one of claims 3 to 5, the method comprising:
controlling the light emitting unit to emit light, wherein the light is reflected by the first reflecting unit to obtain first light and second light;
acquiring a first time t1 when the light receiving unit receives the first light ray and a second time t2 when the light receiving unit receives the second light ray;
calculating a distance value L1 between the measured object and the distance measuring device according to the t1 and the t2;
the calculating the distance value L1 between the measured object and the distance measuring device according to the t1 and the t2 includes:
calculating a distance value L1 between the measured object and the distance measuring device according to L1= (t 2-t 1) multiplied by the speed of light/2-L1-L2, wherein L1 is a distance value between the first reflecting unit and the second reflecting unit, and L2 is a distance value between the second reflecting unit and the first opening.
7. The method according to claim 6, wherein, in a case where the target device is the electronic device and the second housing is spaced apart from the distance measuring device, after calculating the distance value L1 between the measured object and the distance measuring device, the method further comprises:
calculating a distance value L2 between the measured object and the electronic equipment, wherein L2=L1-L4, and L4 is the distance value between the first opening and the second opening.
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