CN104569956A - Distance measuring method and device - Google Patents
Distance measuring method and device Download PDFInfo
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- CN104569956A CN104569956A CN201310476499.9A CN201310476499A CN104569956A CN 104569956 A CN104569956 A CN 104569956A CN 201310476499 A CN201310476499 A CN 201310476499A CN 104569956 A CN104569956 A CN 104569956A
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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
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/74—Systems using reradiation of acoustic waves, e.g. IFF, i.e. identification of friend or foe
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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
- G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
- G01S11/14—Systems for determining distance or velocity not using reflection or reradiation using ultrasonic, sonic, or infrasonic waves
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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
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
- G01S15/06—Systems determining the position data of a target
- G01S15/08—Systems for measuring distance only
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- Radar, Positioning & Navigation (AREA)
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- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Computer Networks & Wireless Communication (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
The invention discloses a distance measuring method and device. The distance measuring method comprises the following steps: a measuring party device receives sound signals used for measuring the distance; the measuring party device obtains a sound signal space transmission distance of the sound signals according to the received sound signals, wherein the sound signal space transmission distance of the sound signals is the distance between the measuring party device and a measured party. The distance measuring method and device can utilize the sound signals to measure the distance and improve the experience of users.
Description
Technical field
The present invention relates to sound signal processing field, particularly relate to a kind of distance-finding method and equipment.
Background technology
Traditional range finding (measurement space distance) equipment mainly special laser range finder, its measuring accuracy is high, affect little by environment for use, but this kind of functions of the equipments are single, miniaturization difficult, and power hungry, need to use special laser generator and receiver, overall plan transplants difficulty to terminal device, and cost is high, and application prospect is little.
All the time, intelligent terminal thinks that user provides more functions more easily and humanized is designed to theory, from integrated camera function, to introducing temperature, optics, temperature, gyroscope, magnetic acceleration gentle pressure meter in ground waits sensor, realize detection and the notice of various environmental variance, on the great impact that user uses the custom of equipment to create, also expedite the emergence of out the application that large quantities of relevant information utilizing these devices to collect carries out reprocessing simultaneously, for terminal user brings much fresh Consumer's Experience with stimulating, enrich the field of terminal applies.But in existing intelligent terminal, do not have distance measurement function, so be badly in need of a kind of technical scheme utilizing intelligent terminal to find range now, improve the experience of user.
Summary of the invention
The main technical problem to be solved in the present invention is, provides a kind of distance-finding method and equipment, and voice signal can be utilized to find range, and improves Consumer's Experience.
For solving the problems of the technologies described above, the invention provides a kind of distance-finding method, comprising the following steps:
Main survey method, apparatus receives the voice signal for finding range;
Described main survey method, apparatus draws the space propagation distance of described voice signal according to the described voice signal received, the space propagation distance of described voice signal is the distance between main survey method, apparatus and tested side.
Further, the described voice signal for finding range comprises: the voice signal that the loudness that tested method, apparatus is play is determined;
Described main survey method, apparatus show that according to the voice signal received the step of the space propagation distance of described voice signal comprises:
The acoustic pressure SPL of the voice signal that the measurement of described main survey method, apparatus receives
Obtain tested method, apparatus to play sound the loudness parameter of signal, in S (d, SPL) curve family, find out corresponding S (d, SPL) curve according to described loudness parameter, wherein d is the space propagation distance of voice signal;
On this curve, the space propagation distance of corresponding described voice signal is matched according to described acoustic pressure SPL;
Described S (d, SPL) curve is the space propagation cutoff characteristic of voice signal, the transverse axis of this curve is the space propagation distance d of voice signal, the longitudinal axis is the acoustic pressure SPL of the voice signal that main survey method, apparatus receives, described S (d, SPL) curve family is formed by S (d, the SPL) curves coalesce of muli-sounds loudness.
Further, the described voice signal for finding range comprises: the voice signal that tested side user repeatedly sends;
Described main survey method, apparatus show that according to the voice signal received the step of the space propagation distance of described voice signal comprises:
The acoustic pressure SPL of the voice signal that main survey method, apparatus repetitive measurement receives, obtains the acoustic pressure difference DELTA SPL of voice signal;
According to described acoustic pressure difference DELTA SPL, at S ' corresponding to all sound intensities, (d, Δ SPL, a) find out acoustic space transmission attenuation curve S corresponding to described Δ SPL ' (d, Δ SPL) in curve family; Then on the acoustic space transmission attenuation curve that described Δ SPL is corresponding, corresponding space propagation distance d is found out according to described acoustic pressure difference DELTA SPL; The data processing preset the space propagation distance d of all acquisitions finally obtains the distance between described main survey method, apparatus and tested side;
Described S ' (d, Δ SPL, a) curve family is the acoustic space transmission attenuation curve family of sound intensity a, its transverse axis is acoustic space transmission range d, the longitudinal axis is the acoustic pressure difference DELTA SPL of voice signal, described S ' (d, Δ SPL, a) acoustic space transmission attenuation curve S ' (d, the Δ SPL) that curve family decays to loudness a by different loudness is polymerized.
Further, the step of the acoustic pressure SPL of voice signal that the measurement of described main survey method, apparatus receives comprises:
The voice signal that the loudness that described tested method, apparatus is play is determined is converted to the level value of electric signal by described main survey method, apparatus;
The acoustic pressure SPL of the voice signal that described main survey method, apparatus receives is obtained according to described level value.
Further, the step that described main survey method, apparatus receives for the voice signal of finding range comprises:
The echo path that described main survey method, apparatus determination energy is maximum, receives the echo signal of the main survey side on this echo path;
Described main survey method, apparatus show that according to the voice signal received the step of the space propagation distance of described voice signal comprises:
Described main survey method, apparatus obtains the time parameter receiving described echo signal;
Described main survey method, apparatus detects the environmental parameter of transfer voice, matches sound propagation velocity according to described environmental parameter;
Described main survey method, apparatus calculates the space propagation distance of described voice signal according to described time parameter and described sound propagation velocity.
Also for ease of and solve above-mentioned technical matters, present invention also offers a kind of distance-measuring equipment, described distance-measuring equipment is as main survey method, apparatus, and it comprises: receiver module and processing module;
Described receiver module is for receiving the voice signal for finding range;
The voice signal that described processing module is used for receiving according to described receiver module draws the space propagation distance of described voice signal, and the space propagation distance of described voice signal is the distance between main survey method, apparatus and tested side.
Further, described processing module comprises: parameter acquisition module, sound pressure measurement module and range finder module;
Described sound pressure measurement module is for measuring the acoustic pressure SPL of the voice signal received;
Described parameter acquisition module to play sound the loudness parameter of signal for obtaining tested method, apparatus;
Described range finder module to play sound the loudness parameter of signal for obtaining tested method, apparatus, according to described loudness parameter at S (d, SPL) corresponding S (d is found out in curve family, SPL) curve, wherein d is space propagation distance, and on this curve, matches the space propagation distance of corresponding described voice signal according to described acoustic pressure SPL;
Described S (d, SPL) curve is the space propagation cutoff characteristic of voice signal, the transverse axis of this curve is space propagation distance d, the longitudinal axis is the acoustic pressure SPL of the voice signal that main survey method, apparatus receives, described S (d, SPL) curve family is formed by S (d, the SPL) curves coalesce of muli-sounds loudness.
Preferentially, described sound pressure measurement module is used for the level value voice signal that the loudness that described tested method, apparatus is play is determined being converted to electric signal; The acoustic pressure SPL of the voice signal that described main survey method, apparatus receives is obtained according to described level value.
Further, the described voice signal for finding range comprises: the voice signal that tested side user repeatedly sends;
Described processing module comprises: sound pressure measurement module and range finder module
Described sound pressure measurement module is used for the acoustic pressure SPL of the voice signal that repetitive measurement receives, and obtains the acoustic pressure difference DELTA SPL of voice signal;
Described range finder module is used for according to described acoustic pressure difference DELTA SPL that (d, Δ SPL, a) find out acoustic space transmission attenuation curve S corresponding to described Δ SPL ' (d, Δ SPL) in curve family at S ' corresponding to all sound intensities; Then on the acoustic space transmission attenuation curve that described Δ SPL is corresponding, corresponding space propagation distance d is found out according to described acoustic pressure difference DELTA SPL; The data processing preset the space propagation distance d of all acquisitions finally obtains the distance between described main survey method, apparatus and tested side;
Described S ' (d, Δ SPL, a) curve family is the acoustic space transmission attenuation curve family of sound intensity a, its transverse axis is acoustic space transmission range d, the longitudinal axis is the acoustic pressure difference DELTA SPL of voice signal, described S ' (d, Δ SPL, a) acoustic space transmission attenuation curve S ' (d, the Δ SPL) that curve family decays to loudness a by different loudness is polymerized.
Further, described receiver module comprises: loop determination module; Described processing module comprises: time-obtaining module, transmission speed matching module and computing module;
Described echo determination module for determining the echo path that energy is maximum, and receives the echo signal of the main survey side on this echo path;
Described time-obtaining module receives the time parameter of described echo signal for obtaining;
Described transmission speed matching module, for detecting the environmental parameter of transfer voice, matches sound propagation velocity according to described environmental parameter;
Described computing module is used for the space propagation distance calculating described voice signal according to described time parameter and described sound propagation velocity.
The invention has the beneficial effects as follows:
The invention provides a kind of distance-finding method and equipment can utilize voice signal to find range, improve Consumer's Experience.Distance-finding method of the present invention comprises: main survey method, apparatus receives the voice signal for finding range; Described main survey method, apparatus draws the space propagation distance of the voice signal of described voice signal according to the described voice signal received, the space propagation distance of the voice signal of described voice signal is the distance between main survey method, apparatus and tested side; Method of the present invention draws the space propagation distance of the voice signal of this voice signal and the distance between main survey method, apparatus and tested side by basis for the voice signal of finding range, compared with finding range with conventional laser, method of the present invention is a brand-new distance-finding method, it can complete range finding with the sound interaction of tested side, replacing utilizes the equipment of this costliness of laser generator to find range, and can reduce costs; Distance-finding method transplantability of the present invention is high in addition, such as, can apply on mobile terminals, makes mobile terminal possess distance measurement function, improves Consumer's Experience.When further the method is applied on mobile terminals, only need the hardware and software resource utilizing mobile terminal to carry just can realize range finding, less to the change of mobile terminal, applicability is stronger.
Accompanying drawing explanation
The schematic flow sheet of a kind of distance-finding method that Fig. 1 provides for the embodiment of the present invention one;
A kind of voice signal according to receiving that Fig. 2 provides for the embodiment of the present invention one obtains the schematic flow sheet of the space propagation distance of voice signal;
The schematic diagram of a kind of S (d, SPL) curve family that Fig. 3 provides for the embodiment of the present invention one;
The schematic diagram of the voice signal range finding that a kind of user that Fig. 4 provides for the embodiment of the present invention one utilizes loudness to determine;
The schematic flow sheet of the voice signal ranging process that Fig. 5 determines according to loudness for a kind of equipment that the embodiment of the present invention one provides;
A kind of user that Fig. 6 provides for the embodiment of the present invention one is by the schematic diagram of people's sound ranging;
A kind of schematic flow sheet utilizing people's sound ranging that Fig. 7 provides for the embodiment of the present invention one;
The schematic diagram of a kind of S ' (d, Δ SPL, the 60dB) curve family that Fig. 8 provides for the embodiment of the present invention one;
The schematic diagram of a kind of S ' (d, Δ SPL, the 120dB) curve family that Fig. 9 provides for the embodiment of the present invention one;
The schematic flow sheet of the equipment utilization echo ranging that Figure 10 provides for the embodiment of the present invention one;
Figure 11 utilizes the schematic diagram of echo ranging for a kind of user that the embodiment of the present invention one provides;
The structural representation of the first testing apparatus that Figure 12 provides for the embodiment of the present invention two;
The structural representation of the second testing apparatus that Figure 13 provides for the embodiment of the present invention two;
The structural representation of the third testing apparatus that Figure 14 provides for the embodiment of the present invention two;
The structural representation of the 4th kind of testing apparatus that Figure 15 provides for the embodiment of the present invention two.
Embodiment
By reference to the accompanying drawings the present invention is described in further detail below by embodiment.
Embodiment one:
As shown in Figure 1, present embodiments provide a kind of distance-finding method, comprise the following steps:
Step 101: main survey method, apparatus receives the voice signal for finding range;
Step 102: described main survey method, apparatus draws the space propagation distance of the voice signal of described voice signal according to the described voice signal received, the space propagation distance of the voice signal of described voice signal is the distance between main survey method, apparatus and tested side.
Method of the present invention draws the space propagation distance of the voice signal of this voice signal and the distance between main survey method, apparatus and tested side by voice signal, compared with finding range with conventional laser, method of the present invention is a brand-new distance-finding method, it can complete range finding with the sound interaction of tested side, replacing utilizes the equipment of this costliness of laser generator to find range, and can reduce costs; Distance-finding method transplantability of the present invention is high in addition, such as, can apply on mobile terminals, makes mobile terminal possess distance measurement function, improves Consumer's Experience.When further the method is applied on mobile terminals, only need the hardware and software resource utilizing mobile terminal to carry just can realize range finding, less to the change of mobile terminal, applicability is stronger.
The distance-finding method of the present embodiment mainly comprises three kinds of concrete ranging schemes:
The first ranging scheme:
When the described voice signal for finding range comprises: the loudness that tested method, apparatus is play determine voice signal time ranging process, now main survey method, apparatus described in above-mentioned steps 102 show that according to the described voice signal received the process of the space propagation distance of the voice signal of described voice signal comprises:
Step 1021: the acoustic pressure SPL of the voice signal that the measurement of described main survey method, apparatus receives.
The acoustic pressure SPL that the voice signal received is measured by the main survey side of the present embodiment can measure in the following manner: the voice signal that the loudness that described tested method, apparatus is play is determined is converted to the level value of electric signal by described main survey method, apparatus;
The acoustic pressure SPL of the voice signal that described main survey method, apparatus receives is obtained according to described level value.
Step 1022: obtain tested method, apparatus and to play sound the loudness parameter of signal, find out corresponding S (d, SPL) curve according to described loudness parameter in S (d, SPL) curve family, wherein d is the space propagation distance of voice signal.
The present embodiment obtains the play sound mode of loudness parameter of signal of tested method, apparatus can be had multiple, such as SMS notification etc.
Step 1023: the space propagation distance matching corresponding described voice signal according to described acoustic pressure SPL on this curve.
S (d in the present embodiment, SPL) curve is the space propagation cutoff characteristic of sound, the transverse axis of this curve is the space propagation distance d of voice signal, the longitudinal axis is the acoustic pressure SPL of the voice signal that main survey method, apparatus receives, described S (d, SPL) curve family is formed by S (d, the SPL) curves coalesce of muli-sounds loudness.
The level value in the present embodiment, the voice signal received being transferred to electric signal can be realized by electro-acoustic element, the transformational relation of different electro-acoustic elements is different, need to be demarcated by acoustics, just can obtain the corresponding relation of this SPL and v, we represent with transfer function V (S).Some analog-and digital-conversion can also be done to small electrical signals after being converted to electric signal, obtaining measuring level value v more accurately.
Also can be obtained by transfer function V (S) when obtaining the acoustic pressure SPL of the voice signal received according to level value equally.
In the present embodiment, S (d, the SPL) curve family of sound is the space propagation cutoff characteristic bunch of sound, and it is defined as:
In acoustics, we characterize the sound size heard with acoustic pressure SPL, the size of acoustic pressure is determined by the loudness of sound source and transmission range, a kind of specific funtcional relationship is presented between they three, the i.e. space propagation cutoff characteristic of sound, the transverse axis of this curve is the space propagation distance d of voice signal, the longitudinal axis is the acoustic pressure SPL value that receiving end obtains, each different sources of sound/sound source loudness all can have a specific curve to represent this attenuation relation, by these collection of curves together, form space propagation cutoff characteristic bunch, the one being illustrated in figure 3 the present embodiment becomes space propagation cutoff characteristic bunch, the generation of this bunch of curve needs acoustics specialized equipment to measure, and use contrast tableau format concrete information to be stored in equipment.
Can also comprise in this ranging scheme: main survey method, apparatus detects the environmental parameter of transfer voice, according to described environmental parameter to described in S (d, SPL) curve family S (d, SPL) curve compensate; Described S (d, SPL) curve is S (d, the SPL) curve after over-compensation.
Such as main survey termination set to or need user to select a series ofly adopt real time environment variable.They comprise atmospheric pressure Pa, humidity W, height above sea level H, temperature T, and geographical environment gain coefficient G and urban architecture density loss factor D.Often introduce a parameter, space propagation cutoff characteristic S (d is attached to regard to having corresponding coefficient, SPL) on, the specifying information of this part parameter also needs acoustics specialized equipment to measure, and revised parameter is stored in terminal by contrast tableau format.The space propagation distance d of more accurate voice signal is obtained by S (d, the SPL) curve after compensation.
Introduce the first ranging scheme in detail below, as shown in Figures 4 and 5:
Step 501: the audio files that user 402 uses the selected loudness parameter of equipment 402a broadcasting to determine, and this loudness parameter is sent to the equipment 401a of user 401;
Step 502: the equipment 401a of user 401 receives voice signal and the loudness parameter of specific audio files, and detects transfer voice environmental parameter, utilizes and detects that environmental parameter compensates S (d, the SPL) curve family that equipment 401a stores;
Environmental parameter can comprise: atmospheric pressure Pa, humidity W, height above sea level H, temperature T, and geographical environment gain coefficient G and urban architecture density loss factor D;
Step 503: the voice signal received is transferred to the level value v of electric signal by equipment 401a;
Step 504: converse the voice signal SPL value that equipment place receives by V (S) function;
V(S) corresponding relation of function representation SPL and level value v;
Step 505: equipment 401a is according to the S (d of loudness parameter after compensation, SPL) S (d corresponding with this loudness parameter is found out in curve family, SPL) curve, finds out the space propagation distance of corresponding voice signal at this curve according to voice signal SPL value.
Can the spacing of the equipment 401a of the user 401 and equipment 402a of user 402 by step 501-505, the ranging scheme of the present embodiment can also take multiple measurements, obtain the space propagation distance of multiple voice signal, the space propagation distance of then getting multiple voice signal carries out the space propagation distance d that calculation process obtains more accurate voice signal.
The second ranging scheme:
When the described voice signal for finding range comprises: during the voice signal that tested side user sends, tested side user repeatedly sounds signal; As shown in Figure 6, user 402 signal of sounding is received by the equipment 401a of user 401; In this scene, main survey method, apparatus described in above-mentioned steps 102 show that according to the voice signal received the process of the space propagation distance of described voice signal can comprise:
The acoustic pressure SPL of the voice signal that main survey method, apparatus repetitive measurement receives, obtains the acoustic pressure difference DELTA SPL of voice signal;
According to described acoustic pressure difference DELTA SPL, at S ' corresponding to all sound intensities, (d, Δ SPL, a) find out acoustic space transmission attenuation curve S corresponding to described Δ SPL ' (d, Δ SPL) in curve family; Then on the acoustic space transmission attenuation curve that described Δ SPL is corresponding, corresponding space propagation distance d is found out according to described acoustic pressure difference DELTA SPL; The data processing preset the space propagation distance d of all acquisitions finally obtains the space propagation distance of the sound that described tested side user sends;
S ' (d, Δ SPL, a) curve family is the acoustic space transmission attenuation curve family of sound intensity a, its transverse axis is acoustic space transmission range, the longitudinal axis is the acoustic pressure difference DELTA SPL of voice signal, (d, Δ SPL, the acoustic space transmission attenuation curves coalesce that a) curve family decays to loudness a by different loudness forms described S '.
In the present embodiment, the acoustic pressure SPL of the voice signal that the measurement of main survey method, apparatus receives can measure in the following manner:
The voice signal received is converted to the level value of electric signal by described main survey method, apparatus;
Obtain the acoustic pressure SPL of the voice signal that described main survey method, apparatus receives according to described level value, such as, can converse by V (S) function the voice signal SPL value that equipment place receives.
The second ranging scheme of the present embodiment is introduced in detail below by an example:
Step 701: tested side user sends twice sound continuously.
Step 702: the acoustic pressure SPL of the voice signal that twice measurement of main survey method, apparatus receives, and calculate the difference of the acoustic pressure SPL of twice measurement, i.e. the acoustic pressure difference DELTA SPL of voice signal.
Measured the acoustic pressure SPL of each voice signal by above-mentioned level conversion, then twice acoustic pressure SPL is subtracted each other to take absolute value and obtain the acoustic pressure difference DELTA SPL of voice signal.
The present embodiment introduces the second ranging scheme with the acoustic pressure difference between twice voice signal, at other application scenarioss, when tested side user contact sends N(N >=2) secondary sound time, main survey method, apparatus can repetitive measurement acoustic pressure SPL, calculate all possible acoustic pressure difference DELTA SPL, data processing is carried out to acoustic pressure difference DELTA SPL and chooses an acoustic pressure difference DELTA SPL the most applicable, to accurately calculate acoustic space transmission range, such as, can average to all acoustic pressure difference DELTA SPL weighting.
Step 703: (d, Δ SPL, a) find out acoustic space transmission attenuation curve S corresponding to described Δ SPL ' (d, Δ SPL) in curve family at S ' corresponding to all loudness according to described acoustic pressure difference DELTA SPL; Then on the acoustic space transmission attenuation curve that described Δ SPL is corresponding, corresponding space propagation distance d is found out according to described acoustic pressure difference DELTA SPL.
Such as, be illustrated in figure 8 S ' (d, Δ SPL, the 60dB) curve family that loudness is 60dB, be illustrated in figure 9, for loudness is S ' (d, Δ SPL, the 120dB) curve family of 120dB; When main survey method, apparatus calculates sound difference DELTA SPL=1dB, the space propagation die-away curve that Δ SPL=1dB is corresponding is found out in curve family shown in Fig. 8, the i.e. curve of Δ 1SPL, then finds out corresponding space propagation distance d1 according to Δ SPL=1dB on the curve of Δ 1SPL; In curve family shown in Fig. 9, find out the space propagation die-away curve that Δ SPL=1dB is corresponding, i.e. Δ 1SPL curve, then on the curve of Δ 1SPL, find out corresponding space propagation distance d2 according to Δ SPL=1dB; Certain the present embodiment just stores the S ' (d of two kinds of loudness in main survey method, apparatus, Δ SPL, a) curve family, in order to space propagation distance can be measured more accurately, the present embodiment can prestore S ' (d, Δ SPL, a) curve family of multiple loudness, such as 60dB to 120dB can be pre-set, totally 61 curve family.
As S ' (d in Fig. 8, Δ SPL, 60dB) curve family is that the die-away curve decaying to 60dB by different loudness parameter is polymerized, wherein Δ 1SPL curve is loudness is the space propagation die-away curve of 61dB sound attenuating to 60dB, Δ 2SPL curve is loudness is the space propagation die-away curve of 62dB sound attenuating to 60dB, other Δs nSPL(n > 1 is positive integer) by that analogy.In like manner in Fig. 9, Δ 1SPL curve is loudness is the space propagation die-away curve of 121dB sound attenuating to 120dB.
Step 704: the space propagation distance d that data processing finally obtains the sound that described tested side user sends is carried out to the space propagation distance of all acquisitions; Namely the distance between main survey method, apparatus and tested side.
Such as, after acquisition d1 and d2, the mode of averaging can be adopted to calculate d, or also can obtain certain reference quantity to screen d1 and d2, or the selection according to user is screened, or the data processing method that other those skilled in the art often adopt to obtain precise information.
(a) curve family can calculate through experiment measuring the S ' of the different loudness in the present embodiment for d, Δ SPL.
Can also comprise in the second ranging scheme: main survey method, apparatus detects the environmental parameter of transfer voice, and according to described environmental parameter, to S ', (d, Δ SPL, a) curve family compensates.
The third ranging scheme:
Be the echo signal of main survey side when main survey method, apparatus receives for the voice signal of finding range, in the present embodiment, the echo signal of main survey side can be the echo signal of main survey method, apparatus displaying audio file, or is the echo signal that main survey side user sounds.As shown in Figure 10, this ranging scheme mainly comprises following process:
Step 1001: the echo path that described main survey method, apparatus determination energy is maximum, receives the echo signal of the main survey side on this echo path;
Step 1002: described main survey method, apparatus obtains the time parameter receiving described echo signal;
Step 1003: described main survey method, apparatus detects the environmental parameter of transfer voice, matches sound propagation velocity according to described environmental parameter;
Step 1004: described main survey method, apparatus calculates the space propagation distance of described voice signal according to described time parameter and described sound propagation velocity.
The third ranging scheme of the present embodiment is mainly found range by the echo signal of main survey side, under not having other equipment to send the test condition of source of sound/sound source, utilize echo principle, user oneself sends the sound or subscriber equipment is sounded, record receives the Echo-delay Delay of echo, terminal synchronizes obtains relating environment values information, such as height above sea level H, humidity W and temperature T etc. can affect the parameter of sound propagation velocity, select the sound propagation velocity VAIR mated with surrounding environment, just the distance of sound transmission can be obtained, the space propagation distance of voice signal can be obtained after calculating.In this scenario, the selection of directed echo is key algorithm, in order to get rid of the echo that reflection paths on other directions or diffraction path produce, as shown in figure 11.As everyone knows, the propagation of sound is isotropic, but the distribution of energy is uneven, utilize this principle in conjunction with many MIC orientation analysis algorithm, just can find ceiling capacity echo direction very accurately, namely user just facing to normal direction, complete directed operation.
The distance-finding method of the present embodiment can utilize voice signal to find range, and has and transplants easily, the feature that cost is low.The distance-finding method of the present embodiment can be applied on mobile terminal or other equipment, so transplant easily; The distance-finding method of the present embodiment can utilize the acoustic pressure parameter of existing audio parts collection, process sound, be aided with miscellaneous equipment (including but not limited to by heat, optics, temperature, gyroscope, sensor such as magnetic acceleration gentle pressure meter etc. collect) environmental parameter that collects compensates, complete the total solution of distance measurement function, can be the utility function that terminal user provides distance measurement function and measures certain acoustic parameter; So cost is low, and the experience of user can be improved.
Embodiment two:
As shown in figure 12, present embodiments provide a kind of distance-measuring equipment, described distance-measuring equipment is as main survey method, apparatus, and it comprises: receiver module and processing module;
Described receiver module is for receiving the voice signal for finding range;
The voice signal that described processing module is used for receiving according to described receiver module draws the space propagation distance of described voice signal, and the space propagation distance of described voice signal is the distance between main survey method, apparatus and tested side.
The distance-measuring equipment of the present embodiment can utilize voice signal to find range, compared with conventional laser distance-measuring equipment, distance-measuring equipment of the present invention can complete range finding with the sound interaction of tested side, replaces and utilizes the equipment of this costliness of laser generator to find range, can reduce costs; Distance-measuring equipment of the present invention can be mobile terminal in addition, and now mobile terminal possesses distance measurement function, improves Consumer's Experience.Further when testing apparatus is mobile terminal, only need the hardware and software resource utilizing mobile terminal to carry just can realize range finding, less to the change of mobile terminal, applicability is stronger.
Preferably, as shown in figure 13, described processing module comprises: parameter acquisition module, sound pressure measurement module and range finder module;
The described voice signal for finding range comprises: the voice signal that the loudness that tested method, apparatus is play is determined;
Described sound pressure measurement module is for measuring the acoustic pressure SPL of the voice signal received;
Described parameter acquisition module to play sound the loudness parameter of signal for obtaining tested method, apparatus;
Described range finder module to play sound the loudness parameter of signal for obtaining tested method, apparatus, according to described loudness parameter at S (d, SPL) corresponding S (d is found out in curve family, SPL) curve, wherein d is space propagation distance, and on this curve, matches the space propagation distance of corresponding described voice signal according to described acoustic pressure SPL;
Described S (d, SPL) curve is the space propagation cutoff characteristic of voice signal, the transverse axis of this curve is space propagation distance d, the longitudinal axis is the acoustic pressure SPL of the voice signal that main survey method, apparatus receives, described S (d, SPL) curve family is formed by S (d, the SPL) curves coalesce of muli-sounds loudness.
Preferably, described sound pressure measurement module is used for the level value voice signal that the loudness that described tested method, apparatus is play is determined being converted to electric signal; The acoustic pressure SPL of the voice signal that described main survey method, apparatus receives is obtained according to described level value.
Preferably, the described voice signal for finding range comprises: the voice signal that tested side user repeatedly sends; Described processing module comprises: sound pressure measurement module and range finder module; With reference to the structure of the distance-measuring equipment shown in Figure 13.
Described sound pressure measurement module is used for the acoustic pressure SPL of the voice signal that repetitive measurement receives, and obtains the acoustic pressure difference DELTA SPL of voice signal;
Described range finder module is used for according to described acoustic pressure difference DELTA SPL that (d, Δ SPL, a) find out acoustic space transmission attenuation curve S corresponding to described Δ SPL ' (d, Δ SPL) in curve family at S ' corresponding to all sound intensities; Then on the acoustic space transmission attenuation curve that described Δ SPL is corresponding, corresponding space propagation distance d is found out according to described acoustic pressure difference DELTA SPL; The data processing preset the space propagation distance d of all acquisitions finally obtains the distance between described main survey method, apparatus and tested side;
Described S ' (d, Δ SPL, a) curve family is the acoustic space transmission attenuation curve family of sound intensity a, its transverse axis is acoustic space transmission range d, the longitudinal axis is the acoustic pressure difference DELTA SPL of voice signal, described S ' (d, Δ SPL, a) acoustic space transmission attenuation curve S ' (d, the Δ SPL) that curve family decays to loudness a by different loudness is polymerized.
Preferably, as shown in figure 14, the distance-measuring equipment shown in Figure 13 can also comprise: detection module;
Described detection module is for detecting the environmental parameter of transfer voice;
Described range finder module also for according to described environmental parameter to described in S (d, SPL) curve family S (d, SPL) curve compensate;
Described S (d, SPL) curve is S (d, the SPL) curve after over-compensation.
Distance-measuring equipment shown in Figure 14 can be found range in adaptive environment change, it can measuring distance more accurately, testing apparatus is when according to tested side's user voice signal range finding, and equally still can comprise detection module testing environment parameter, range finder module environmentally parameter carries out curve compensation.
Preferably, as shown in figure 15, on the basis of the distance-measuring equipment shown in Figure 12, described receiver module comprises: loop determination module; Described processing module comprises: time-obtaining module, transmission speed matching module and computing module;
Described echo determination module for determining the echo path that energy is maximum, and receives the echo signal of the main survey side on this echo path;
Described time-obtaining module receives the time parameter of described echo signal for obtaining;
Described transmission speed matching module, for detecting the environmental parameter of transfer voice, matches sound propagation velocity according to described environmental parameter;
Described computing module is used for the space propagation distance calculating described voice signal according to described time parameter and described sound propagation velocity.
The distance-measuring equipment of the present embodiment can utilize voice signal to find range, and has practical, the feature that cost is low.When the distance-measuring equipment of the present embodiment is mobile terminal, the acoustic pressure parameter of existing audio parts collection in mobile terminal, process sound can be utilized, be aided with miscellaneous equipment (including but not limited to by heat, optics, temperature, gyroscope, sensor such as magnetic acceleration gentle pressure meter etc. collect) environmental parameter that collects compensates, complete the total solution of distance measurement function, can be the utility function that terminal user provides distance measurement function and measures certain acoustic parameter, the experience of user can be improved.
Above content is in conjunction with concrete embodiment further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. a distance-finding method, is characterized in that, comprises the following steps:
Main survey method, apparatus receives the voice signal for finding range;
Described main survey method, apparatus draws the space propagation distance of described voice signal according to the described voice signal received, the space propagation distance of described voice signal is the distance between main survey method, apparatus and tested side.
2. distance-finding method as claimed in claim 1, it is characterized in that, the described voice signal for finding range comprises: the voice signal that the loudness that tested method, apparatus is play is determined;
Described main survey method, apparatus show that according to the voice signal received the step of the space propagation distance of described voice signal comprises:
The acoustic pressure SPL of the voice signal that the measurement of described main survey method, apparatus receives;
Obtain tested method, apparatus to play sound the loudness parameter of signal, in S (d, SPL) curve family, find out corresponding S (d, SPL) curve according to described loudness parameter, wherein d is the space propagation distance of voice signal;
On this curve, the space propagation distance of corresponding described voice signal is matched according to described acoustic pressure SPL;
Described S (d, SPL) curve is the space propagation cutoff characteristic of voice signal, the transverse axis of this curve is the space propagation distance d of voice signal, the longitudinal axis is the acoustic pressure SPL of the voice signal that main survey method, apparatus receives, described S (d, SPL) curve family is formed by S (d, the SPL) curves coalesce of muli-sounds loudness.
3. distance-finding method as claimed in claim 1, it is characterized in that, the described voice signal for finding range comprises: the voice signal that tested side user repeatedly sends;
Described main survey method, apparatus show that according to the voice signal received the step of the space propagation distance of described voice signal comprises:
The acoustic pressure SPL of the voice signal that main survey method, apparatus repetitive measurement receives, and obtain the acoustic pressure difference DELTA SPL of voice signal;
According to described acoustic pressure difference DELTA SPL, at S ' corresponding to all sound intensities, (d, Δ SPL, a) find out acoustic space transmission attenuation curve S corresponding to described Δ SPL ' (d, Δ SPL) in curve family; Then on the acoustic space transmission attenuation curve that described Δ SPL is corresponding, corresponding space propagation distance d is found out according to described acoustic pressure difference DELTA SPL; The data processing preset the space propagation distance d of all acquisitions finally obtains the distance between described main survey method, apparatus and tested side;
Described S ' (d, Δ SPL, a) curve family is the acoustic space transmission attenuation curve family of sound intensity a, its transverse axis is acoustic space transmission range d, the longitudinal axis is the acoustic pressure difference DELTA SPL of voice signal, described S ' (d, Δ SPL, a) acoustic space transmission attenuation curve S ' (d, the Δ SPL) that curve family decays to loudness a by different loudness is polymerized.
4. distance-finding method as claimed in claim 2, it is characterized in that, the step of the acoustic pressure SPL of the voice signal that the measurement of described main survey method, apparatus receives comprises:
The voice signal that the loudness that described tested method, apparatus is play is determined is converted to the level value of electric signal by described main survey method, apparatus;
The acoustic pressure SPL of the voice signal that described main survey method, apparatus receives is obtained according to described level value.
5. distance-finding method as claimed in claim 1, is characterized in that, the step that described main survey method, apparatus receives for the voice signal of finding range comprises:
The echo path that described main survey method, apparatus determination energy is maximum, receives the echo signal of the main survey side on this echo path;
Described main survey method, apparatus show that according to the voice signal received the step of the space propagation distance of described voice signal comprises:
Described main survey method, apparatus obtains the time parameter receiving described echo signal;
Described main survey method, apparatus detects the environmental parameter of transfer voice, matches sound propagation velocity according to described environmental parameter;
Described main survey method, apparatus calculates the space propagation distance of described voice signal according to described time parameter and described sound propagation velocity.
6. a distance-measuring equipment, is characterized in that, described distance-measuring equipment is as main survey method, apparatus, and it comprises: receiver module and processing module;
Described receiver module is for receiving the voice signal for finding range;
The voice signal that described processing module is used for receiving according to described receiver module draws the space propagation distance of described voice signal, and the space propagation distance of described voice signal is the distance between main survey method, apparatus and tested side.
7. distance-measuring equipment as claimed in claim 6, it is characterized in that, described processing module comprises: parameter acquisition module, sound pressure measurement module and range finder module;
The described voice signal for finding range comprises: the voice signal that the loudness that tested method, apparatus is play is determined;
Described sound pressure measurement module is for measuring the acoustic pressure SPL of the voice signal received;
Described parameter acquisition module to play sound the loudness parameter of signal for obtaining tested method, apparatus;
Described range finder module to play sound the loudness parameter of signal for obtaining tested method, apparatus, according to described loudness parameter at S (d, SPL) corresponding S (d is found out in curve family, SPL) curve, wherein d is space propagation distance, and on this curve, matches the space propagation distance of corresponding described voice signal according to described acoustic pressure SPL;
Described S (d, SPL) curve is the space propagation cutoff characteristic of voice signal, the transverse axis of this curve is space propagation distance d, the longitudinal axis is the acoustic pressure SPL of the voice signal that main survey method, apparatus receives, described S (d, SPL) curve family is formed by S (d, the SPL) curves coalesce of muli-sounds loudness.
8. distance-measuring equipment as claimed in claim 6, it is characterized in that, the described voice signal for finding range comprises: the voice signal that tested side user repeatedly sends;
Described processing module comprises: sound pressure measurement module and range finder module;
Described sound pressure measurement module is used for the acoustic pressure SPL of the voice signal that repetitive measurement receives, and obtains the acoustic pressure difference DELTA SPL of voice signal;
Described range finder module is used for according to described acoustic pressure difference DELTA SPL that (d, Δ SPL, a) find out acoustic space transmission attenuation curve S corresponding to described Δ SPL ' (d, Δ SPL) in curve family at S ' corresponding to all sound intensities; Then on the acoustic space transmission attenuation curve that described Δ SPL is corresponding, corresponding space propagation distance d is found out according to described acoustic pressure difference DELTA SPL; The data processing preset the space propagation distance d of all acquisitions finally obtains the distance between described main survey method, apparatus and tested side;
Described S ' (d, Δ SPL, a) curve family is the acoustic space transmission attenuation curve family of sound intensity a, its transverse axis is acoustic space transmission range d, the longitudinal axis is the acoustic pressure difference DELTA SPL of voice signal, described S ' (d, Δ SPL, a) acoustic space transmission attenuation curve S ' (d, the Δ SPL) that curve family decays to loudness a by different loudness is polymerized.
9. distance-measuring equipment as claimed in claim 7, is characterized in that, described sound pressure measurement module is used for the level value voice signal that the loudness that described tested method, apparatus is play is determined being converted to electric signal; The acoustic pressure SPL of the voice signal that described main survey method, apparatus receives is obtained according to described level value.
10. distance-measuring equipment as claimed in claim 6, it is characterized in that, described receiver module comprises: loop determination module; Described processing module comprises: time-obtaining module, transmission speed matching module and computing module;
Described echo determination module for determining the echo path that energy is maximum, and receives the echo signal of the main survey side on this echo path;
Described time-obtaining module receives the time parameter of described echo signal for obtaining;
Described transmission speed matching module, for detecting the environmental parameter of transfer voice, matches sound propagation velocity according to described environmental parameter;
Described computing module is used for the space propagation distance calculating described voice signal according to described time parameter and described sound propagation velocity.
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