CN114554384B - Bluetooth headset anti-interference performance test system - Google Patents
Bluetooth headset anti-interference performance test system Download PDFInfo
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- CN114554384B CN114554384B CN202210371766.5A CN202210371766A CN114554384B CN 114554384 B CN114554384 B CN 114554384B CN 202210371766 A CN202210371766 A CN 202210371766A CN 114554384 B CN114554384 B CN 114554384B
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- 238000011056 performance test Methods 0.000 title claims abstract description 7
- 230000005236 sound signal Effects 0.000 claims abstract description 80
- 238000012360 testing method Methods 0.000 claims abstract description 42
- 238000004088 simulation Methods 0.000 claims abstract description 35
- 238000004458 analytical method Methods 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 8
- 238000005070 sampling Methods 0.000 claims description 47
- 238000010295 mobile communication Methods 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 6
- 238000001228 spectrum Methods 0.000 claims description 6
- 230000002452 interceptive effect Effects 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 4
- 210000005069 ears Anatomy 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 238000004422 calculation algorithm Methods 0.000 description 4
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- 230000001186 cumulative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R29/00—Monitoring arrangements; Testing arrangements
- H04R29/001—Monitoring arrangements; Testing arrangements for loudspeakers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention relates to a Bluetooth headset anti-interference performance test system, which comprises a Bluetooth simulation interference system, first Bluetooth pairing equipment, a server, a first sound acquisition device and a signal analysis device; the Bluetooth simulation interference system is used for quantitatively simulating a Bluetooth interference environment; the first Bluetooth pairing device is used for transmitting data information to the Bluetooth headset to be tested; the first sound collection device is used for collecting sound signals sent by the Bluetooth headset to be tested and converting the sound signals into first audio signals; the signal analysis device judges whether the connection between the Bluetooth headset to be tested and the first Bluetooth pairing device is interrupted or not, and counts the interrupted information. According to the invention, the interference signal can be quantified through the server and the Bluetooth simulation interference system, and the standard for judging the connection interruption of the Bluetooth earphone to be tested can be quantified through the signal analysis device, so that the problem that the test result loses reference significance due to the fact that the interference environment changes in the test process and the judgment standard is not uniform when the connection state is manually judged is solved.
Description
Technical Field
The invention belongs to the technical field of Bluetooth headset anti-interference performance test, and particularly relates to a Bluetooth headset anti-interference performance test system.
Background
Because the 2.4ghz ism band is not authorized and is globally open, users are very many because of its convenience, such as: the mobile phone, the WIFI, the Bluetooth, the IoT, the microwave oven and the like are all in the frequency band, and when signals are crowded, the Bluetooth earphone connection is interrupted, so that bad use experience is brought to users. Because of the interference, a need arises to test the anti-interference capability of bluetooth headsets. The traditional mode for testing the anti-interference performance of the Bluetooth headset mainly selects scenes with more interference signals, such as airports, high-speed rail stations and the like, and judges the sound quality effect of the Bluetooth headset through the mode of hearing, but the quantity of the interference signals in the scenes is changed at any time, the fluctuation is large, the electric quantity of a battery of equipment can also influence the Bluetooth connection, and the standard that the mode of hearing can not be uniformly judged is adopted, so that quantitative analysis of the anti-interference test of the Bluetooth headset can not be performed, and the reference meaning of the test result is not great.
Disclosure of Invention
Therefore, the invention aims to provide a system for testing anti-interference performance of a Bluetooth headset.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a Bluetooth headset anti-interference performance test system comprises:
the Bluetooth simulation interference system is used for quantitatively simulating a Bluetooth interference environment;
the first Bluetooth pairing device is used for establishing connection with the Bluetooth headset to be tested in the simulated Bluetooth interference environment and transmitting data information to the Bluetooth headset to be tested; wherein the data information comprises a preselected standard audio signal;
the server is used for controlling the interference signal intensity of the Bluetooth simulation interference system;
the first sound acquisition device is used for acquiring sound signals sent by the Bluetooth headset to be detected and converting the sound signals into first audio signals;
and the signal analysis device is used for obtaining a sampling audio signal according to the first audio signal, comparing the sampling audio signal with a preselected standard audio signal, judging whether the connection between the Bluetooth headset to be tested and the first Bluetooth pairing device is interrupted or not, and counting the interrupted information.
Further, the Bluetooth simulation interference system comprises a shielding room, and a WiFi data simulation device and a Bluetooth countermeasure simulation device which are arranged in the shielding room;
the shielding room is used for shielding electromagnetic signals from the outside of the shielding room;
the WiFi data simulation device comprises a plurality of WiFi access devices and WiFi terminal devices which are connected with the WiFi access devices in a one-to-one correspondence manner, wherein the WiFi access devices and the WiFi terminal devices are electrically connected with a server;
the Bluetooth countermeasure analog device comprises a plurality of second Bluetooth pairing devices and interference Bluetooth headphones which are connected with the second Bluetooth pairing devices in a one-to-one correspondence manner through Bluetooth connection; the second Bluetooth pairing device is electrically connected with the server;
the server is used for controlling the connection quantity of the WiFi access equipment and the WiFi terminal equipment, and the connection quantity of the second Bluetooth pairing equipment and the interference Bluetooth earphone.
Further, the server is further configured to check connection conditions of each WiFi access device and a corresponding WiFi terminal device, and connection conditions of each second bluetooth pairing device and a corresponding interference bluetooth headset, and determine whether the test is valid according to the connection conditions.
Further, the Bluetooth simulation interference system further comprises mobile base station equipment arranged in the shielding room and a plurality of mobile communication terminals connected to the communication network of the mobile base station equipment, wherein the mobile base station equipment and the mobile communication terminals are electrically connected with the server.
Further, the Bluetooth simulation interference system further comprises a second sound acquisition device arranged in the shielding chamber, and the second sound acquisition device is electrically connected with the signal analysis device; the signal analysis device is used for respectively storing the audio signals acquired by the first sound acquisition device and the second sound acquisition device, removing the audio signals acquired by the second sound acquisition device from the audio signals acquired by the first sound acquisition device, and taking the obtained signals as sampled audio signals.
Further, a wireless receiving device is arranged in the shielding room and is used for receiving wireless signals in the shielding room; the wireless receiving device is electrically connected with a spectrum analyzer arranged outside the shielding chamber.
Further, the first sound collection device comprises at least one artificial ear, and the artificial ear is used for simulating the human ear to contain a loudspeaker of the Bluetooth headset to be tested; each artificial ear is provided with a first microphone, and the first microphone is electrically connected with the signal analysis device.
Further, the standard audio signal selected in advance is a sine wave signal of an audio frequency band.
Further, the method for determining whether the connection between the bluetooth headset to be tested and the first bluetooth pairing device is interrupted by the signal analysis device comprises the following steps:
s1, presetting a first time threshold and a peak error threshold, wherein the first time threshold is greater than or equal to half period of a standard audio signal;
s2, replacing all sampling values of the sampled audio signal with absolute values of the sampling values;
s3, selecting a sampling point, finding out the maximum value of sampling values in a first time threshold range taking the sampling point as a starting point, and calculating the absolute value of the difference between the maximum value and the peak value of the standard audio signal;
s4, comparing whether the absolute value of the difference between the maximum value and the peak value of the standard audio signal is smaller than or equal to a peak error threshold value, and if so, executing the step S5; otherwise, executing the step S8;
s5, calculating an average value of sampling values obtained by sampling the standard audio signal in a first time threshold range taking the sampling point as a starting point to serve as an ideal average value, and calculating the average value of the sampling values in the first time threshold range taking the sampling point as the starting point in the sampled audio signal to serve as an actual average value; calculating the absolute value of the difference between the ideal average value and the actual average value;
s6, presetting a mean error threshold, comparing the absolute value of the difference between the ideal mean value and the actual mean value with the preset mean error threshold, and executing the step S7 if the absolute value of the difference between the ideal mean value and the actual mean value is smaller than or equal to the preset mean error threshold; otherwise, executing the step S8;
s7, judging that the Bluetooth headset to be tested and the first Bluetooth pairing device at the moment corresponding to the sampling point are normally connected;
s8, judging that connection interruption of the Bluetooth headset to be tested and the first Bluetooth pairing device at the moment corresponding to the sampling point;
s9, repeating the step S3 and the step S4, sequentially judging whether the connection between the Bluetooth headset to be tested and the first Bluetooth pairing device is interrupted at the moment corresponding to each sampling point in the test period, and counting the interrupted information.
Further, the information of the interruption includes the interruption rate, the interruption times, and the start time and the end time of each interruption in the test period.
According to the invention, the Bluetooth interference environment is quantitatively simulated through the Bluetooth interference simulation system, so that interference signals can be quantized, and the phenomenon that the test result loses reference significance due to the change of the interference environment in the test process is avoided; the signal analysis device is used for comparing the sampled audio signal with the preselected standard audio signal, so that the standard for judging the connection interruption of the Bluetooth headset to be detected can be quantized, whether the connection of the Bluetooth headset to be detected is interrupted or not can be automatically judged by adopting an algorithm, and the problem of non-uniform judgment standard caused by manual judgment is avoided.
Drawings
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in the following preferred detail with reference to the accompanying drawings, in which:
fig. 1 is a block diagram of a bluetooth headset anti-interference performance testing system according to a preferred embodiment of the present invention.
Fig. 2 is a flowchart for determining whether the connection between the bluetooth headset to be tested and the first bluetooth pairing device is interrupted, and counting interruption information.
Detailed Description
The following description of the embodiments of the invention is given by way of specific examples, the illustrations provided in the following examples merely illustrate the basic idea of the invention, and the following examples and features of the examples can be combined with one another without conflict.
As shown in fig. 1, a preferred embodiment of the bluetooth headset anti-interference performance testing system of the present invention includes a bluetooth analog interference system, a first bluetooth pairing device, a server, a first sound collecting device and a signal analyzing device. The Bluetooth simulation interference system is used for quantitatively simulating a Bluetooth interference environment; in one specific example, the bluetooth analog interference system preferably comprises a shielded room, and a WiFi data analog device and a bluetooth countermeasure analog device disposed in the shielded room.
The shielding chamber is used for shielding electromagnetic signals from outside the shielding chamber.
The WiFi data simulation device is used for building a WiFi data simulation field, and preferably comprises a plurality of WiFi access devices and WiFi terminal devices which are connected with the WiFi access devices in a one-to-one correspondence manner, wherein the WiFi access devices are used for carrying out data transmission with the corresponding WiFi terminal devices in a WiFi connection manner; and the WiFi access equipment and the WiFi terminal equipment are electrically connected with the server. The WiFi access device may be a WiFi router, a portable WiFi terminal device, a WiFi hotspot device, or other devices for implementing a WiFi access function, and is preferably a WiFi router. The WiFi terminal equipment is preferably a mobile phone with a WiFi transmission function, so that the working state of the WiFi terminal equipment can be conveniently obtained through a server.
The Bluetooth countermeasure simulation device is used for building a Bluetooth countermeasure simulation field, and preferably comprises a plurality of second Bluetooth pairing devices and interference Bluetooth headphones connected with the second Bluetooth pairing devices in a one-to-one correspondence manner, wherein the second Bluetooth pairing devices are used for carrying out data transmission with the corresponding interference Bluetooth headphones in a Bluetooth connection manner; the second Bluetooth pairing device is electrically connected with the server. The second Bluetooth pairing device is preferably a mobile phone with a Bluetooth transmission function, so that the working state of the second Bluetooth pairing device can be conveniently obtained through the server, and the data content transmitted by the second Bluetooth pairing device to the interference Bluetooth headset can be selected.
When the WiFi data simulation device and the Bluetooth countermeasure simulation device are arranged in the shielding room, the electromagnetic field simulation software can be used for selecting the setting positions of the WiFi access equipment, the WiFi terminal equipment, the second Bluetooth pairing equipment and the interference Bluetooth earphone, so that the WiFi signals of the WiFi access equipment and the WiFi terminal equipment and the Bluetooth signals of the interference Bluetooth earphone form interference superposition at the Bluetooth earphone to be tested by the second Bluetooth pairing equipment and the interference Bluetooth earphone, the interference of the WiFi data simulation field and the Bluetooth countermeasure simulation field to the Bluetooth earphone to be tested is increased, and the superposition interference of the WiFi data simulation field and the Bluetooth countermeasure simulation field to the WiFi access equipment, the WiFi terminal equipment, the second Bluetooth pairing equipment and the interference Bluetooth earphone is reduced as much as possible.
The server is used for controlling whether each WiFi access device is connected with the corresponding connected WiFi terminal device or not, so as to control the connection quantity of the WiFi access device and the WiFi terminal device and control the interference signal intensity formed by the WiFi data simulation field; and controlling whether each second Bluetooth pairing device is connected with the corresponding interference Bluetooth earphone or not, so as to control the connection quantity of the second Bluetooth pairing device and the interference Bluetooth earphone and control the interference signal intensity formed by the Bluetooth anti-simulation field. The strength of the WiFi signal transmitted by each WiFi access device and the strength of the Bluetooth signal transmitted by each second Bluetooth pairing device can be controlled through the server if necessary.
In order to avoid the simulated interference environment from changing after interruption caused by interference of the WiFi access equipment, the WiFi terminal equipment, the second Bluetooth pairing equipment or the interference Bluetooth earphone, the test result loses the reference value; the server can also be used for checking the connection condition of each WiFi access device and the corresponding WiFi terminal device, checking the connection condition of each second Bluetooth pairing device and the corresponding interference Bluetooth headset, and judging whether the test is effective or not according to the connection condition. When the number of WiFi access devices disconnected with the WiFi terminal equipment reaches a preset number or the number of second Bluetooth pairing devices disconnected with the interference Bluetooth headset reaches a preset number, judging that the test is invalid; otherwise, the test is determined to be valid.
Because the signals of the mobile communication base station are almost ubiquitous in real life, and the signals of the mobile communication base station also cause interference to the Bluetooth headset, in order to better simulate the interference environment of the Bluetooth headset, the Bluetooth simulation interference system further comprises small or miniature communication base station equipment arranged in a shielding room and a plurality of mobile terminal equipment (such as mobile phones) connected with the communication base station equipment, thereby constructing a base station signal simulation field, simulating the interference of the signals of the mobile communication base station to the Bluetooth headset, and enabling the interference environment to be closer to the actual use environment. The small-sized or miniature communication base station equipment and each mobile terminal equipment can be electrically connected with a server, and the transmitting power of the communication base station equipment and the data content transmitted by each mobile terminal equipment can be controlled through the server so as to control the signal intensity of the base station signal simulation field.
In order to better monitor the wireless interference signals transmitted by the Bluetooth analog interference system, a wireless receiving device can be arranged in the shielding room and used for receiving the wireless signals in the shielding room; the wireless receiving equipment is electrically connected with a spectrum analyzer arranged outside the shielding chamber; therefore, the frequency spectrum of the wireless interference signal in the shielding room can be visually displayed on the frequency spectrum analyzer, so that the frequency spectrum distribution condition of the wireless interference signal and the signal intensity of each frequency point can be conveniently checked, and the testing process can be better monitored.
The first Bluetooth pairing device is used for establishing connection with the Bluetooth headset to be tested in an analog Bluetooth interference environment and transmitting data information to the Bluetooth headset to be tested; wherein the data information comprises a pre-selected standard audio signal. In order to facilitate the subsequent analysis of the audio signal, the pre-selected standard audio signal may be selected as a sine wave signal of an audio frequency band, so that the bluetooth headset to be tested can emit a corresponding sound signal. In this embodiment, the standard audio signal is a kilocycle signal that is easy to recognize. Because the kiloweek signal is transmitted to the Bluetooth headset to be tested through the BLE 2.4GHz frequency band, the Bluetooth headset to be tested starts to play the audio of the kiloweek signal after receiving the data information; the audio is interfered by other signals at the stage of being transmitted from the first Bluetooth pairing device to the Bluetooth headset to be tested, so that whether the connection between the first Bluetooth pairing device and the Bluetooth headset to be tested is interrupted or not can be judged through kiloweek audio played by the Bluetooth headset to be tested.
The first sound collection device is used for collecting sound signals sent by the Bluetooth headset to be tested and converting the sound signals into first audio signals. The first sound collection device comprises at least one artificial ear, wherein the artificial ear is used for simulating the human ear to contain a loudspeaker of the Bluetooth headset to be tested; each artificial ear is provided with a first microphone, and the first microphone is electrically connected with the signal analysis device. For example, since the bluetooth headset is generally provided with a speaker for two ears of a corresponding person, two artificial ears can be manufactured according to the shape and softness of the human ears to simulate the left ear and the right ear of the person, and the two speakers of the bluetooth headset to be tested extend into the two artificial ears respectively to simulate the state of the person wearing the headset, and a first microphone is respectively arranged in the two artificial ears to collect sound signals and convert the sound signals into corresponding audio signals. The first microphone is electrically connected with the signal analysis device, and of course, for a bluetooth headset with only one loudspeaker, only one artificial ear can be arranged to collect audio signals.
The signal analysis device is used for storing the audio signals acquired by the first sound acquisition device, obtaining sampled audio signals according to the first audio signals, comparing the sampled audio signals with preselected standard audio signals, and judging whether the connection between the Bluetooth headset to be tested and the first Bluetooth pairing device is interrupted or not and counting the interrupted information. The signal analysis means may be a computer with sound analysis software.
The signal analysis means may directly take the first audio signal as a sampled audio signal. However, since the interference bluetooth headset also emits sound when in use, and other sounds may interfere with the test during the test, in order to eliminate the interference sound, in this embodiment, a second sound collecting device is preferably disposed in the shielding chamber, and the second sound collecting device may be a microphone; and the second sound collecting device needs to keep a certain position with the first sound collecting device so as to avoid the second sound collecting device to collect the sound emitted by the Bluetooth headset to be tested. The second sound collection device is electrically connected with the signal analysis device, the signal analysis device stores the audio signals collected by the first sound collection device and the second sound collection device at the same time, removes the audio signals collected by the second sound collection device from the audio signals collected by the first sound collection device, takes the obtained signals as sampled audio signals, and removes the noise in the shielding room from the audio signals collected by the first sound collection device, so that the test result is more accurate.
The signal analysis device compares the sampled audio signal with a preselected standard audio signal (namely, kilocycle signal) and judges whether the connection between the Bluetooth headset to be tested and the first Bluetooth pairing device is interrupted or not. If the kiloweek signal played by the Bluetooth headset is interrupted, the connection interruption of the Bluetooth headset to be tested and the first Bluetooth pairing device is represented, so that the interruption times of the kiloweek signal played by the Bluetooth headset are counted, and the connection stability of the Bluetooth headset to be tested and the first Bluetooth pairing device can be truly reflected. Comparing the sampled audio signal with the kiloweek signal, and judging whether the connection between the Bluetooth headset to be tested and the first Bluetooth pairing device is interrupted or not, wherein the most direct method is to sample the kiloweek signal according to the same sampling interval as the sampled audio signal, comparing the deviation amplitude of the sampling value of each sampling point of the sampled audio signal relative to the sampling value of the corresponding sampling point of the kiloweek signal one by one, and judging that the Bluetooth headset to be tested and the first Bluetooth pairing device are connected normally at the moment corresponding to the sampling point if the deviation amplitude is smaller than or equal to the preset amplitude (such as +/-5 percent); otherwise, judging that the connection between the Bluetooth headset to be tested and the first Bluetooth pairing device at the moment corresponding to the sampling point is interrupted. However, the method is too harsh to the normal connection judgment standard, and many conditions which have no influence on human ears can be judged as interruption, so that the test result is inconsistent with the actual experience of the user. Therefore, as shown in fig. 2, in this embodiment, the following steps are adopted to determine whether the connection between the bluetooth headset to be tested and the first bluetooth pairing device is interrupted:
s1, presetting a first time threshold and a peak error threshold in a signal analysis device, wherein the first time threshold is greater than or equal to half period of a kilocycle signal; since the first time threshold is less than half a period of the kilocycle signal, it may happen that the first time threshold does not include a signal peak (including a positive peak and a negative peak), and therefore the first time threshold should be selected to be greater than or equal to half a period of the kilocycle signal, and in this embodiment, it is preferable that the first time threshold is equal to two periods of the kilocycle signal.
S2, the signal analysis device replaces all sampling values of the sampled audio signal with absolute values thereof; so that the negative value of the sampled value is changed to a positive value for subsequent calculation.
S3, selecting a sampling point, finding out the maximum value of sampling values in a first time threshold range taking the sampling point as a starting point, namely finding out the peak value of the sampled audio signal in the first time threshold range; and calculating an absolute value of a difference between the maximum value and a peak value of the kilocycle signal.
S4, comparing whether the absolute value of the difference between the maximum value and the peak value of the kilocycle signal is smaller than or equal to a peak error threshold value, if so, indicating that the peak value of the sampled audio signal in a first time threshold value range is close to the peak value of the kilocycle signal, executing S5, and continuously adopting a mean value mode to judge that the Bluetooth headset to be tested and the first Bluetooth pairing device are normally connected; otherwise, the fact that the peak value of the sampled audio signal in the first time threshold range is too large or too small is indicated, the step S8 is executed, and connection interruption of the Bluetooth headset to be tested and the first Bluetooth pairing device is judged.
S5, calculating an average value of sampling values obtained by sampling the kilo-week signal in a first time threshold range taking the sampling point as a starting point to serve as an ideal average value, and calculating the average value of the sampling values in the first time threshold range taking the sampling point as the starting point in the sampled audio signal to serve as an actual average value.
S6, presetting a mean error threshold, comparing the absolute value of the difference between the ideal mean value and the actual mean value with the preset mean error threshold, and executing the step S7 if the absolute value of the difference between the ideal mean value and the actual mean value is smaller than or equal to the preset mean error threshold; otherwise, the step S8 is performed. Through the judgment of adding the mean value after judging that the peak value is normal, the two judgment modes are combined, so that the judgment result is more close to the actual experience of the user.
And S7, judging that the Bluetooth headset to be tested and the first Bluetooth pairing device at the moment corresponding to the sampling point are normally connected.
S8, judging that connection between the Bluetooth headset to be tested and the first Bluetooth pairing device at the moment corresponding to the sampling point is interrupted.
S9, repeating the step S3 and the step S4, sequentially judging whether the connection between the Bluetooth headset to be tested and the first Bluetooth pairing device is interrupted at the moment corresponding to each sampling point in the test period, and counting the interrupted information. The information of the interruption comprises an interruption rate, interruption times, starting time and ending time of each interruption in the test period; the calculation formula of the interruption rate is as follows:
interruption rate = cumulative interruption duration over test period/total duration of test period.
And quantitatively evaluating the anti-interference capability of the Bluetooth headset to be tested through the interruption rate and the interruption times. Since the performance is also different for different individuals of the same model; these differences can therefore also be eliminated by: 2 pairs of Bluetooth headphones to be tested are prepared for each type, 2 parts of corresponding first Bluetooth pairing equipment are also prepared, and two pairs of Bluetooth headphones to be tested in the same type are respectively tested; in addition, the average value can be obtained by repeating the test for each pair of Bluetooth headphones to be tested.
In addition, the first microphone may be electrically connected to an audio analyzer disposed outside the shielding chamber; therefore, the waveform of the sound signal collected by the first microphone can be visually displayed on the audio analyzer, the obvious interruption position can be found according to the waveform, and the obvious interruption position can be compared with the information of interruption counted by the signal analysis device so as to verify the accuracy of the analysis algorithm of the signal analysis device.
According to the invention, the Bluetooth interference environment is quantitatively simulated through the Bluetooth interference simulation system, so that interference signals can be quantized, and the phenomenon that the test result loses reference significance due to the change of the interference environment in the test process is avoided; the intensity of the interference signal can be controlled, and the interference condition can be conveniently adjusted according to the test requirement. The signal analysis device is used for comparing the sampled audio signal with the preselected standard audio signal, so that the standard for judging the connection interruption of the Bluetooth headset to be detected can be quantized, whether the connection of the Bluetooth headset to be detected is interrupted or not can be automatically judged by adopting an algorithm, and the problem of non-uniform judgment standard caused by manual judgment is avoided. By optimizing the algorithm, the judgment result is closer to the actual experience of the user, and the test result has more practical significance.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, which is intended to be covered by the claims of the present invention.
Claims (9)
1. A Bluetooth headset anti-interference performance test system is characterized by comprising:
the Bluetooth simulation interference system is used for quantitatively simulating a Bluetooth interference environment;
the first Bluetooth pairing device is used for establishing connection with the Bluetooth headset to be tested in the simulated Bluetooth interference environment and transmitting data information to the Bluetooth headset to be tested; wherein the data information comprises a preselected standard audio signal;
the server is used for controlling the interference signal intensity of the Bluetooth simulation interference system;
the first sound acquisition device is used for acquiring sound signals sent by the Bluetooth headset to be detected and converting the sound signals into first audio signals;
the signal analysis device is used for obtaining a sampled audio signal according to the first audio signal, comparing the sampled audio signal with a preselected standard audio signal, judging whether the connection between the Bluetooth headset to be tested and the first Bluetooth pairing device is interrupted or not, and counting the interrupted information;
the method for judging whether the connection between the Bluetooth headset to be tested and the first Bluetooth pairing device is interrupted by the signal analysis device comprises the following steps:
s1, presetting a first time threshold and a peak error threshold, wherein the first time threshold is greater than or equal to half period of a standard audio signal;
s2, replacing all sampling values of the sampled audio signal with absolute values of the sampling values;
s3, selecting a sampling point, finding out the maximum value of sampling values in a first time threshold range taking the sampling point as a starting point, and calculating the absolute value of the difference between the maximum value and the peak value of the standard audio signal;
s4, comparing whether the absolute value of the difference between the maximum value and the peak value of the standard audio signal is smaller than or equal to a peak error threshold value, and if so, executing the step S5; otherwise, executing the step S8;
s5, calculating an average value of sampling values obtained by sampling the standard audio signal in a first time threshold range taking the sampling point as a starting point to serve as an ideal average value, and calculating the average value of the sampling values in the first time threshold range taking the sampling point as the starting point in the sampled audio signal to serve as an actual average value; calculating the absolute value of the difference between the ideal average value and the actual average value;
s6, presetting a mean error threshold, comparing the absolute value of the difference between the ideal mean value and the actual mean value with the preset mean error threshold, and executing the step S7 if the absolute value of the difference between the ideal mean value and the actual mean value is smaller than or equal to the preset mean error threshold; otherwise, executing the step S8;
s7, judging that the Bluetooth headset to be tested and the first Bluetooth pairing device at the moment corresponding to the sampling point are normally connected;
s8, judging that connection interruption of the Bluetooth headset to be tested and the first Bluetooth pairing device at the moment corresponding to the sampling point;
s9, repeating the step S3 and the step S4, sequentially judging whether the connection between the Bluetooth headset to be tested and the first Bluetooth pairing device is interrupted at the moment corresponding to each sampling point in the test period, and counting the interrupted information.
2. The system for testing the anti-interference performance of the Bluetooth headset according to claim 1, wherein the Bluetooth interference simulation system comprises a shielding room, and a WiFi data simulation device and a Bluetooth countermeasure simulation device which are arranged in the shielding room;
the shielding room is used for shielding electromagnetic signals from the outside of the shielding room;
the WiFi data simulation device comprises a plurality of WiFi access devices and WiFi terminal devices which are connected with the WiFi access devices in a one-to-one correspondence manner, wherein the WiFi access devices and the WiFi terminal devices are electrically connected with a server;
the Bluetooth countermeasure analog device comprises a plurality of second Bluetooth pairing devices and interference Bluetooth headphones which are connected with the second Bluetooth pairing devices in a one-to-one correspondence manner through Bluetooth connection; the second Bluetooth pairing device is electrically connected with the server;
the server is used for controlling the connection quantity of the WiFi access equipment and the WiFi terminal equipment, and the connection quantity of the second Bluetooth pairing equipment and the interference Bluetooth earphone.
3. The system of claim 2, wherein the server is further configured to check connection conditions between each WiFi access device and a corresponding WiFi terminal device, and connection conditions between each second bluetooth pairing device and a corresponding interfering bluetooth headset, and determine whether the test is valid according to the connection conditions.
4. The system for testing the anti-interference performance of the bluetooth headset according to claim 2, wherein the bluetooth analog interference system further comprises a mobile base station device arranged in the shielding room, and a plurality of mobile communication terminals connected to a communication network of the mobile base station device, and the mobile base station device and the mobile communication terminals are electrically connected to the server.
5. The bluetooth headset tamper resistance testing system of claim 2, wherein the bluetooth analog tamper system further comprises a second sound collection device disposed within the shielded room, the second sound collection device being electrically connected to the signal analysis device; the signal analysis device is used for respectively storing the audio signals acquired by the first sound acquisition device and the second sound acquisition device, removing the audio signals acquired by the second sound acquisition device from the audio signals acquired by the first sound acquisition device, and taking the obtained signals as sampled audio signals.
6. The bluetooth headset anti-interference performance testing system according to claim 2, wherein a wireless receiving device is further arranged in the shielding room, and the wireless receiving device is used for receiving wireless signals in the shielding room; the wireless receiving device is electrically connected with a spectrum analyzer arranged outside the shielding chamber.
7. The system of claim 1, wherein the first sound collection device comprises at least one artificial ear for simulating a human ear to receive a speaker of the bluetooth headset under test; each artificial ear is provided with a first microphone, and the first microphone is electrically connected with the signal analysis device.
8. The bluetooth headset tamper resistance testing system of claim 1, wherein the preselected standard audio signal is a sine wave signal in an audio frequency band.
9. The bluetooth headset tamper resistance testing system according to claim 1, wherein the information of the interrupts includes an interrupt rate, the number of interrupts, and a start time and an end time of each interrupt in the test period.
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| CN115243310A (en) * | 2022-07-13 | 2022-10-25 | 深圳百讴声学技术有限公司 | Wireless transmission signal anti-interference test method and system based on change curve characteristics |
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