CN115061095B - A millimeter wave high-precision ranging method based on accurate chirp delay - Google Patents
A millimeter wave high-precision ranging method based on accurate chirp delay Download PDFInfo
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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
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/28—Details of pulse systems
- G01S7/285—Receivers
- G01S7/292—Extracting wanted echo-signals
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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
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/06—Systems determining position data of a target
- G01S13/08—Systems 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
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/28—Details of pulse systems
- G01S7/285—Receivers
- G01S7/295—Means for transforming co-ordinates or for evaluating data, e.g. using computers
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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
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/35—Details of non-pulse systems
- G01S7/352—Receivers
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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
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/35—Details of non-pulse systems
- G01S7/352—Receivers
- G01S7/354—Extracting wanted echo-signals
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- Radar, Positioning & Navigation (AREA)
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Abstract
本发明提供一种基于精确chirp延时的毫米波高精度测距方法，包括：步骤1：获取毫米波雷达对目标物进行测距时接收的回波信号；步骤2：基于回波信号和预设的原始chirp信号，构建第一中频信号；步骤3：基于第一中频信号，确定目标物的粗粒度的预估测距区间；步骤4：基于预估测距区间，确定延时Td；步骤5：基于回波信号和相对于原始chirp信号延时延时Td后的延时chirp信号，构建第二中频信号；步骤6：基于第二中频信号，确定目标物的细粒度的目标距离。本发明的基于精确chirp延时的毫米波高精度测距方法，提升了测距精度。
The present invention provides a millimeter wave high-precision ranging method based on precise chirp delay, comprising: step 1: obtaining an echo signal received when a millimeter wave radar performs ranging on a target; step 2: constructing a first intermediate frequency signal based on the echo signal and a preset original chirp signal; step 3: determining a coarse-grained estimated ranging interval of the target based on the first intermediate frequency signal; step 4: determining a delay T d based on the estimated ranging interval; step 5: constructing a second intermediate frequency signal based on the echo signal and a delayed chirp signal after a delay T d relative to the original chirp signal; step 6: determining a fine-grained target distance of the target based on the second intermediate frequency signal. The millimeter wave high-precision ranging method based on precise chirp delay of the present invention improves ranging accuracy.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a millimeter wave high-precision ranging method based on precise chirp delay.
Background
Currently, in the traditional millimeter wave measurement principle and engineering implementation, the accuracy of actual ranging is limited by Rangebin resolution, which is basically due to the insufficient frequency resolution capability of the intermediate frequency signal. However, since the frequency component of the intermediate frequency signal generated by the millimeter wave analog front end is limited, the ranging accuracy cannot be infinitely refined, and the current level only uses rangebin for ranging, so that the accuracy of coarse ranging (generally in centimeter level) can be achieved.
Thus, a solution is needed.
Disclosure of Invention
The invention aims to provide a millimeter wave high-precision ranging method based on accurate chirp delay, which comprises the steps of firstly performing coarse ranging, determining the approximate position of a target object, determining the delay chirp according to the approximate position, constructing a new intermediate frequency with echo, and performing fine-granularity ranging on the approximate position according to the new intermediate frequency, thereby improving the ranging precision.
The millimeter wave high-precision distance measurement method based on accurate chirp delay provided by the embodiment of the invention comprises the following steps:
Step 1, acquiring an echo signal received when a millimeter wave radar ranges a target object;
Step 2, constructing a first intermediate frequency signal based on the echo signal and a preset original chirp signal;
Step 3, determining an estimated ranging interval of coarse granularity of the target object based on the first intermediate frequency signal;
Step 4, determining a delay T d based on the estimated ranging interval;
step 5, constructing a second intermediate frequency signal based on the echo signal and the delayed chirp signal delayed by the delay T d relative to the original chirp signal;
and 6, determining the fine-grained target distance of the target object based on the second intermediate frequency signal.
Preferably, the step 2 of constructing a first intermediate frequency signal based on the echo signal and a preset original chirp signal includes:
and constructing a first intermediate frequency signal according to the echo signal and a preset original chirp signal based on a preset first construction rule.
Preferably, the step 3 of determining an estimated ranging interval of coarse granularity of the target object based on the first intermediate frequency signal includes:
Analyzing the first intermediate frequency signal based on a preset first analysis rule to obtain a plurality of first distance values;
And respectively taking the maximum value and the minimum value in the first distance value as interval boundaries to manufacture an estimated distance measurement interval of coarse granularity of the target object.
Preferably, the step 4 of determining the delay T d based on the estimated ranging interval includes:
construction interval-delay Shi Ku;
And determining the delay T d corresponding to the estimated ranging interval based on the interval-delay Shi Ku.
Preferably, the step 5 includes constructing a second intermediate frequency signal based on the echo signal and the delayed chirp signal delayed by the delay T d with respect to the original chirp signal, including:
And based on a preset second construction rule, constructing a second intermediate frequency signal according to the echo signal and the delayed chirp signal delayed by the delay T d relative to the original chirp signal.
Preferably, the determining, based on the second intermediate frequency signal, the target distance of the fine granularity of the target object includes:
And analyzing the second intermediate frequency signal based on a preset second analysis rule to obtain a plurality of second distance values which are used as the fine-grained target distance of the target object.
Preferably, the construction interval-delay library includes:
acquiring a preset test interval set, wherein the test interval set comprises a plurality of intervals;
Obtaining a plurality of test records corresponding to the interval and used for carrying out interval suitable delay test, wherein the test records comprise a test process and a test result;
performing process splitting on the test process to obtain a plurality of sub-processes;
Acquiring a preset first characteristic extraction template and a process evaluation library corresponding to the process type of the sub-process;
Performing feature extraction on the sub-process based on the first feature extraction template to obtain a plurality of first feature values;
Constructing a process description factor based on the first characteristic value;
determining an evaluation value based on the process evaluation library and the process description factor;
Acquiring process weights of the sub-processes corresponding to the test processes;
Assigning the evaluation value to correspond to the process weight, obtaining a target value, and correlating with the corresponding test record;
Accumulating and calculating the target value associated with the test record to obtain a target value sum;
extracting the maximum target value and the corresponding delay in the test result in the test record;
Pairing the time delay with the interval to obtain a pairing item;
acquiring a preset blank database, and adding the pairing items into the blank database;
and when the pairing items which are required to be added into the blank database are added, taking the blank database as an interval-delay Shi Ku, and completing construction.
Preferably, the obtaining a plurality of test records corresponding to the interval and used for performing an interval suitable delay test includes:
acquiring a preset manual input warehouse;
determining a test record which is input by a first tester and is suitable for delay test of the interval and corresponds to the interval from the manual input library;
And/or the number of the groups of groups,
When a plurality of second testers start to perform interval suitable delay tests, an online conference room is built, and all the second testers are connected into the online conference room;
Acquiring a plurality of first dialogue records generated by the person testing person in the online conference room;
A test record is determined based on the first session record.
Preferably, the determining a test record based on the first dialogue record includes:
Extracting the semantics of the first dialogue record to obtain first semantics;
Acquiring a preset irrelevant semantic library, and matching the first semantic with a second semantic in the irrelevant semantics;
If the matching is met, eliminating the first dialogue record corresponding to the first semantic matched;
when the first dialogue records needing to be removed are removed, taking the rest first dialogue records as second dialogue records;
establishing a time axis;
Acquiring a generation time point of the dialogue record;
Correspondingly setting the second dialogue record on the time axis based on the generation time point;
Acquiring a preset test semantic library;
Matching the first semantics corresponding to the second dialogue record with third semantics in the test semantics library;
If the matching is met, acquiring a preset item to be recorded corresponding to the third semantic matched, and simultaneously taking a preset number of second dialogue records before and/or after the second dialogue records corresponding to the first semantic matched on the time axis as a third dialogue record;
determining whether the item to be recorded is effective based on the third dialogue record;
if yes, taking the corresponding item to be recorded as a target to be recorded;
And integrating the targets to be recorded to obtain a test record.
Preferably, the determining whether the to-be-recorded item is effective based on the third dialogue record includes:
Acquiring a preset semantic understanding model;
inputting the second dialogue record and the third dialogue record corresponding to the matched first semantics into the semantic understanding model, and determining whether the item to be recorded takes effect or not;
And/or the number of the groups of groups,
Acquiring a preset second feature extraction template and an effective determination library corresponding to the first semantic matching and conforming to the third semantic matching;
based on the second feature extraction template, extracting features of the first semantics corresponding to the third dialogue record and the position relationship of the second dialogue record and the third dialogue record corresponding to the matched and matched first semantics on the time axis to obtain a plurality of second feature values;
constructing a semantic description factor based on the second characteristic value;
and determining whether the item to be recorded is effective or not based on the effective determination library and the semantic description factor.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a flow chart of a millimeter wave high-precision ranging method based on accurate chirp delay in an embodiment of the invention;
FIG. 2 is a schematic diagram of a millimeter wave high-precision ranging method based on accurate chirp delay in an embodiment of the invention;
Fig. 3 is a schematic diagram of a millimeter wave high-precision ranging method based on precise chirp delay according to an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
The embodiment of the invention provides a millimeter wave high-precision ranging method based on accurate chirp delay, which is shown in figures 1-3 and comprises the following steps:
Step 1, acquiring an echo signal received when a millimeter wave radar ranges a target object;
Step 2, constructing a first intermediate frequency signal based on the echo signal and a preset original chirp signal;
Step 3, determining an estimated ranging interval of coarse granularity of the target object based on the first intermediate frequency signal;
Step 4, determining a delay T d based on the estimated ranging interval;
step 5, constructing a second intermediate frequency signal based on the echo signal and the delayed chirp signal delayed by the delay T d relative to the original chirp signal;
Step 6, determining the fine granularity target distance of the target object based on the second intermediate frequency signal;
step 2, constructing a first intermediate frequency signal based on the echo signal and a preset original chirp signal, including:
based on a preset first construction rule, constructing a first intermediate frequency signal according to the echo signal and a preset original chirp signal;
step 3, determining an estimated ranging interval of coarse granularity of the target object based on the first intermediate frequency signal, including:
Analyzing the first intermediate frequency signal based on a preset first analysis rule to obtain a plurality of first distance values;
Taking the maximum value and the minimum value in the first distance value as interval boundaries respectively, and manufacturing an estimated distance measurement interval of coarse granularity of the target object;
And 4, determining a delay T d based on the estimated ranging interval, including:
construction interval-delay Shi Ku;
Based on the interval-delay Shi Ku, determining a delay T d corresponding to the estimated ranging interval;
The step 5 of constructing a second intermediate frequency signal based on the echo signal and the delayed chirp signal delayed by the delay T d relative to the original chirp signal, includes:
Based on a preset second construction rule, constructing a second intermediate frequency signal according to the echo signal and the delayed chirp signal delayed by the delay T d relative to the original chirp signal;
the determining the fine-grained target distance of the target object based on the second intermediate frequency signal includes:
And analyzing the second intermediate frequency signal based on a preset second analysis rule to obtain a plurality of second distance values which are used as the fine-grained target distance of the target object.
The working principle and the beneficial effects of the technical scheme are as follows:
After the millimeter wave radar is used for scanning the target object, the echo signal is reflected from the target object. A preset first construction rule is introduced, wherein the first construction rule is that, as shown in fig. 2, the echo signal and the original chirp signal are spread in the same frequency-time coordinate system (vertical axis frequency, horizontal axis), and the difference between the frequencies of the radar echo signal and the original chirp signal in the overlapping area is used as a first intermediate frequency signal (intermediate frequency 1 in the figure). Based on a first construction rule, constructing a first intermediate frequency signal according to the echo signal and a preset original chirp signal. A preset first analysis rule is introduced, wherein the first analysis rule is to perform frequency domain analysis on a first intermediate frequency signal, and frequency points in the first intermediate frequency signal correspond to the distance from an origin to a target, so that a first distance value can be obtained, and the method belongs to the technical category of the conventional millimeter wave radar ranging principle. And respectively taking the maximum value and the minimum value in the first distance value as interval boundaries to construct an estimated ranging interval, as shown in fig. 3. And introducing interval-delay Shi Ku, wherein delay values corresponding to different estimated ranging intervals are stored in an interval-delay library. And determining the delay T d corresponding to the estimated ranging interval based on the interval-delay library. A second construction rule is introduced, which is identical to the first construction rule, and a second intermediate frequency signal (intermediate frequency 2 in the figure) is constructed based on the echo signal and the delayed chirp signal, as shown in fig. 2. And introducing a preset second analysis rule, wherein the second analysis rule is the same as the first analysis rule, and carrying out frequency domain analysis on the second intermediate frequency signal based on the second analysis rule to obtain the target distance of fine granularity.
The application firstly carries out coarse ranging, determines the approximate position of the target object, determines delay chirp according to the approximate position, constructs a new intermediate frequency with the echo, carries out fine-granularity ranging on the approximate position according to the new intermediate frequency, and improves the ranging precision.
The embodiment of the invention provides a millimeter wave high-precision distance measurement method based on accurate chirp delay, which constructs an interval-delay library and comprises the following steps:
acquiring a preset test interval set, wherein the test interval set comprises a plurality of intervals;
Obtaining a plurality of test records corresponding to the interval and used for carrying out interval suitable delay test, wherein the test records comprise a test process and a test result;
performing process splitting on the test process to obtain a plurality of sub-processes;
Acquiring a preset first characteristic extraction template and a process evaluation library corresponding to the process type of the sub-process;
Performing feature extraction on the sub-process based on the first feature extraction template to obtain a plurality of first feature values;
Constructing a process description factor based on the first characteristic value;
determining an evaluation value based on the process evaluation library and the process description factor;
Acquiring process weights of the sub-processes corresponding to the test processes;
Assigning the evaluation value to correspond to the process weight, obtaining a target value, and correlating with the corresponding test record;
Accumulating and calculating the target value associated with the test record to obtain a target value sum;
extracting the maximum target value and the corresponding delay in the test result in the test record;
Pairing the time delay with the interval to obtain a pairing item;
acquiring a preset blank database, and adding the pairing items into the blank database;
and when the pairing items which are required to be added into the blank database are added, taking the blank database as an interval-delay Shi Ku, and completing construction.
The working principle and the beneficial effects of the technical scheme are as follows:
When the interval-delay library is constructed, a preset interval is introduced, wherein the interval is different estimated ranging intervals. Obtaining a plurality of test records corresponding to intervals for performing interval suitable delay tests, wherein the interval suitable tests are that a tester fixedly places a millimeter wave radar and a target object, the distance between the millimeter wave radar and the target object is fixed, different delay chirp is set after the interval is estimated by a measurement area, the rationality of the delay chirp is determined according to the comparison between the final ranging result and the fixed distance between the millimeter wave radar and the target object, the test records comprise test processes and test results, the test processes are, for example, which testers exist and which test operations are performed by the testers, and the test results are the determined suitable delay chirp.
It is desirable to determine the appropriate delay chirp for the different regions based on the test records. However, because of the large influence of human factors in the test, the test process needs to be verified. Splitting the testing process into a plurality of sub-processes, and introducing a preset first feature extraction template and a process evaluation library corresponding to the process type of the sub-process, wherein the process type can be, for example, a testing operation type and the like, and the process evaluation library stores evaluation values corresponding to different process description factors. Based on the first feature extraction template, feature extraction is performed on the segmentation process to obtain a plurality of first feature values, such as experience level values of testers, the number of steps for performing operation, and the like. Based on the first eigenvalue, a process description factor is constructed, the process description factor can be a description vector constructed based on the first eigenvalue, and the construction vector and the description vector based on the data belong to the category of the prior art, and are not described in detail. An evaluation value is determined based on the process description factor and the process evaluation library. The process weights of the sub-processes corresponding to the test processes are obtained, and the process weights represent the importance degree of the sub-processes relative to the test processes. The sub-process is given a corresponding process weight (both are multiplied) to obtain the target value. And accumulating the target values associated with the test records to obtain a target value sum, wherein the accumulated calculation formula is as follows: for the sum of the target values, α i is the ith target value associated with the test record, and n is the total number of target values associated with the test record. And selecting the maximum target value and the corresponding delay in the test result in the test record to pair with the corresponding interval, and incorporating a blank database to construct a database. The accuracy of the interval-delay Shi Ku construction is guaranteed, and convenience and applicability of the delay T d corresponding to the range interval estimated based on the library inquiry are improved.
The embodiment of the invention provides a millimeter wave high-precision ranging method based on accurate chirp delay, which comprises the steps of obtaining a plurality of test records corresponding to a section and used for carrying out section suitable delay test, wherein the test records comprise:
acquiring a preset manual input warehouse;
determining a test record which is input by a first tester and is suitable for delay test of the interval and corresponds to the interval from the manual input library;
And/or the number of the groups of groups,
When a plurality of second testers start to perform interval suitable delay tests, an online conference room is built, and all the second testers are connected into the online conference room;
Acquiring a plurality of first dialogue records generated by the person testing person in the online conference room;
A test record is determined based on the first session record.
The working principle and the beneficial effects of the technical scheme are as follows:
The test records are obtained in two modes, namely, the first mode is that the first tester inputs the test records manually, and different first testers input the test records manually and all exist in a manual input warehouse, and the second mode is that when each second tester starts to test, the second tester enters an online conference room, dialogues are carried out in the online conference room, and the test records are determined based on the first dialog records.
The embodiment of the invention provides a millimeter wave high-precision ranging method based on accurate chirp delay, which is used for determining a test record based on a first dialogue record and comprises the following steps:
Extracting the semantics of the first dialogue record to obtain first semantics;
Acquiring a preset irrelevant semantic library, and matching the first semantic with a second semantic in the irrelevant semantics;
If the matching is met, eliminating the first dialogue record corresponding to the first semantic matched;
when the first dialogue records needing to be removed are removed, taking the rest first dialogue records as second dialogue records;
establishing a time axis;
Acquiring a generation time point of the dialogue record;
Correspondingly setting the second dialogue record on the time axis based on the generation time point;
Acquiring a preset test semantic library;
Matching the first semantics corresponding to the second dialogue record with third semantics in the test semantics library;
If the matching is met, acquiring a preset item to be recorded corresponding to the third semantic matched, and simultaneously taking a preset number of second dialogue records before and/or after the second dialogue records corresponding to the first semantic matched on the time axis as a third dialogue record;
determining whether the item to be recorded is effective based on the third dialogue record;
if yes, taking the corresponding item to be recorded as a target to be recorded;
And integrating the targets to be recorded to obtain a test record.
The working principle and the beneficial effects of the technical scheme are as follows:
When determining test records based on the first dialogue records, firstly, a preset irrelevant semantic library is introduced, a large number of irrelevant semantics are stored in the irrelevant semantic library, for example, the current points, the test time and the like, the first semantics extracted from the first dialogue records are matched with the second semantics in the irrelevant semantic library, and if the matching is met, the corresponding first dialogue records are removed. And eliminating irrelevant dialogue content, reducing the resources determined by the test records, and improving the efficiency of determining the test records.
And setting the second dialogue record which is not rejected on the time axis. A preset test semantic library is introduced, a large number of semantics related to a test topic are stored in the test semantic library, for example, the 'distance measurement result is more than or equal to', the first semantics corresponding to the second dialogue record are matched with the third semantics in the test semantic library, if the matching is met, the record is required, a preset item to be recorded corresponding to the third semantics corresponding to the matching is obtained, for example, the third semantics is 'distance measurement 10 m', the item to be recorded is 'distance measurement result is 10 m', but the item to be recorded is not necessarily the result required to be recorded, for example, a mouth error is generated when a second tester reads the distance, and the 'distance measurement is not 10.1 m' later, so that whether the item to be recorded is effective or not is required to be recorded is determined according to the preset number of third dialogue records before and/or after the second dialogue record corresponding to the first semantics corresponding to the matching is met on a time axis. And integrating the effective items to be recorded as targets to be recorded to obtain a test record. The test record is determined through the chat conversation process of the tester, the user does not need to input by himself, convenience is improved, the method is particularly suitable for the test scene when more data need to be recorded, in addition, the test record is effectively verified, and accuracy of determining the test record based on the chat record is improved.
The embodiment of the invention provides a millimeter wave high-precision ranging method based on accurate chirp delay, which is used for determining whether an item to be recorded takes effect or not based on the third dialogue record, and comprises the following steps:
Acquiring a preset semantic understanding model;
inputting the second dialogue record and the third dialogue record corresponding to the matched first semantics into the semantic understanding model, and determining whether the item to be recorded takes effect or not;
And/or the number of the groups of groups,
Acquiring a preset second feature extraction template and an effective determination library corresponding to the first semantic matching and conforming to the third semantic matching;
based on the second feature extraction template, extracting features of the first semantics corresponding to the third dialogue record and the position relationship of the second dialogue record and the third dialogue record corresponding to the matched and matched first semantics on the time axis to obtain a plurality of second feature values;
constructing a semantic description factor based on the second characteristic value;
and determining whether the item to be recorded is effective or not based on the effective determination library and the semantic description factor.
The working principle and the beneficial effects of the technical scheme are as follows:
Based on the third dialogue record, when determining whether the item to be recorded is effective, the method comprises the steps of firstly, introducing a preset semantic understanding model, wherein the semantic understanding model is an artificial intelligent model obtained by training a neural network model to be converged by utilizing a large number of records for manually understanding the semantic and/or a large number of test processes effective semantics (such as unchanged after speaking test results) and invalid semantics (such as unchanged after speaking test results), the model training and the neural network model belong to the category of the prior art, and are not repeated, inputting a second dialogue record and a fourth dialogue record which are matched and correspond to the first semantics into the semantic understanding model to determine whether the item to be recorded is effective, secondly, introducing a preset second feature extraction template and an effective determination library which are matched and correspond to the first semantics when the third semantics are matched, wherein the effective determination library stores the result of determining whether the first semantics corresponding to different semantic description factors are effective, and extracting the second dialogue record and the second dialogue record corresponding to the first semantics corresponding to the matched and the third dialogue record corresponding to the second semantic on the time axis on the basis of the second feature extraction template, and extracting the second dialogue record and the second dialogue record corresponding to the first semantics on the time axis on the basis of the second feature extraction template, and obtaining the feature value of the second dialogue value and the second feature value which is the negative feature value. Based on the second feature values, a semantic description factor is constructed, which is the same as the process description factor. Based on the validation determination library and the semantic description factor, it is determined whether the item to be recorded is validated. The comprehensiveness and the accuracy of whether the item to be recorded takes effect or not are improved, and meanwhile, the method is more intelligent.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
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| CN104569961B (en) * | 2015-01-22 | 2017-04-26 | 中国科学院电子学研究所 | Radar ranging method based on spectrum zooming |
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