Wireless transmission signal anti-interference test equipment and method

Abstract

The present invention discloses a wireless transmission signal anti-interference test device and method, which is used to test the anti-interference ability of a Bluetooth headset, including a main control device, a signal generating device, a test device and a signal acquisition device. The parameter value of the interference signal generated by the signal generating device is controllable and adjustable, and the signal has high stability and good linearity. The test device provides a closed test environment, and simulates various usage scenarios of mobile terminals and Bluetooth headsets therein, so that the entire test environment and the interference signal used for the test are in a controllable state, and the same product can be repeatedly tested multiple times, which can not only judge and evaluate the performance of the product, but also be used to analyze and find problems. At the same time, the signal acquisition device collects test information from the test device, and the main control device analyzes and processes it. Through data calculation, the anti-interference characteristic curves of different products are obtained, and the test results and performance data analysis results of the product are obtained intuitively and clearly.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless device detection, and in particular to a wireless transmission signal anti-interference testing device and method. Background Art

[0002] Since the Bluetooth transmission frequency band is in the same frequency band as WIFI 2.4G, there is strong interference to Bluetooth transmission in crowded areas such as airports, railway stations, subway stations, and other places with complex WiFi signals, causing intermittent communication of Bluetooth devices. Therefore, Bluetooth transmission equipment manufacturers need a measurement and evaluation device that can comprehensively measure the anti-interference performance of the equipment.

[0003] In the past, the production of Bluetooth audio communication equipment was small and the technical requirements were relatively simple, so the requirements of various manufacturers for anti-interference were not high, so the demand for this item was not obvious. In recent years, the production of Bluetooth devices has increased sharply, the software transmission protocol and hardware circuits around Bluetooth communication have become richer, and the trend of high-definition Bluetooth audio transmission has become more and more obvious. The requirements for the anti-interference ability of Bluetooth audio communication equipment have become higher and higher, and Bluetooth device manufacturers have paid more and more attention to the requirements for anti-interference.

[0004] At present, various Bluetooth device manufacturers do not have dedicated Bluetooth device anti-interference test equipment. The current methods used to measure and evaluate anti-interference are relatively primitive methods:

[0005] 1. Build a simple 2.4G-2.5G interference source, set the interference intensity, and perform manual listening counting on the device under test. Count once you hear the connection and disconnection. At the same time, compare the headphones and other devices with better anti-interference on the market to roughly determine the anti-interference ability of the self-produced equipment.

[0006] Disadvantages: (1) The measurement results are inaccurate. Since the interference source is simply built, the state of the interference source itself is unstable, which has a great impact on the measurement results. If multiple people test at the same time, the Bluetooth devices will interfere with each other, which will affect the test results. (2) The test data is not global. Since the interference signal of the simple interference source is single, and the actual application interference situation is diverse, the response of the device is completely different in different interference environments. Therefore, it often happens that in environment A, device 1 is better than device 2, and in environment B, device 2 is better than device 1. Therefore, it is impossible to judge the device capabilities from a global perspective.

[0007] 2. Field test: The tester will carry the headset to crowded areas such as airports, railway stations, and subway stations for field testing, and manual counting and measurement will still be used.

[0008] Disadvantages: (1) High labor costs. Since the test needs to be conducted dozens or even hundreds of times, each test requires 2-5 people to conduct the test for several hours. (2) The external environment is uncontrollable and has a great impact on the interference signal. During field testing, the interference signal is affected by factors such as the density of personnel and changes in position, which makes the data of each measurement vary greatly. It can only be used for rough judgment and the data is not analyzable. (3) The test data is not global. Since the interference conditions in the actual environment are diverse, the same device reacts differently in different interference environments. Moreover, the interference signals in the test environment are not repeatable, so it is impossible to judge the anti-interference ability of the device from a global perspective.

[0009] Therefore, the interference signals in simple test environments and field tests vary greatly and have no repeatability or reproducibility. The measured data can only be used for the final evaluation of the tested product and cannot be used for analysis and problem finding. Summary of the invention

[0010] In view of this, it is necessary to provide a wireless transmission signal anti-interference testing device and method with a stable testing environment, accurate and reliable test results, and which can be repeatedly implemented.

[0011] A wireless transmission signal anti-interference test device, used to test the anti-interference ability of Bluetooth headsets, including a main control device, a signal generating device, a test device and a signal acquisition device:

[0012] Wherein, the signal generating device is used to generate an interference signal with an adjustable parameter value;

[0013] The test device is used to simulate the interference environment encountered by the Bluetooth headset during use. The mobile terminal and the Bluetooth headset are placed in the test device to test the anti-interference ability of the Bluetooth headset in an environment where interference signals with different spectra and different amplitude values ​​exist;

[0014] The signal acquisition device is used to collect the interference signal inside the test device and the sound signal output by the Bluetooth headset in real time;

[0015] The main control device is used to generate a control signal to control and adjust the parameter value of the interference signal generated by the signal generating device so that it meets the test requirements. At the same time, the interference signal collected in the test device and the sound signal output by the Bluetooth headset are analyzed to obtain a characteristic curve that characterizes the anti-interference ability of the Bluetooth headset.

[0016] Furthermore, the signal generating device includes a multi-channel programmable signal generator, at least one frequency band filter, at least one programmable attenuator, a signal synthesis device, a power divider and at least one radio frequency amplifier connected in sequence, wherein the control ends of the multi-channel programmable signal generator and the programmable attenuator are connected to the main control device and controlled and adjusted by the main control device.

[0017] Furthermore, the multi-channel programmable signal generator has one or more first signal output terminals, each of the first signal output terminals is connected to the second signal input terminal of a frequency band filter, the second signal output terminal of each frequency band filter is connected to the third signal input terminal of a programmable attenuator, the third signal output terminals of multiple programmable attenuators are connected to the fourth signal input terminal of a signal synthesizer, the fourth signal output terminal of the signal synthesizer is connected to the fifth signal input terminal of the power divider, the power divider has multiple fifth signal output terminals, the fifth signal output terminal of each power divider is respectively connected to the sixth signal input terminal of a radio frequency amplifier, and the sixth signal output terminal of each radio frequency amplifier is connected to one of the test devices.

[0018] Furthermore, the number of the first signal output terminals of the multi-channel programmable signal generator, the number of the frequency band filters and the number of the programmable attenuators are consistent and connected in a one-to-one correspondence.

[0019] Furthermore, the test equipment includes a sealed test shielding box and an interference antenna, a spectrum monitoring antenna, and at least one sound collection device arranged in the test shielding box. The interference antenna is used to send the interference signal generated by the signal generating device, and the spectrum monitoring antenna is used to receive the interference signal in the test shielding box with full frequency band coverage.

[0020] Furthermore, an earphone swing mechanism is also provided in the test shielding box, and the earphone swing mechanism is used to drive the Bluetooth earphone to swing at a predetermined angle during testing.

[0021] Furthermore, the signal acquisition device includes an interference signal monitoring spectrum analyzer and an audio signal acquisition device, the input end of the interference signal monitoring spectrum analyzer is connected to the spectrum monitoring antenna, the output end of the interference signal monitoring spectrum analyzer is connected to the main control device, the input end of the audio signal acquisition device is connected to at least one of the sound acquisition devices, and the output end of the audio signal acquisition device is connected to the main control device.

[0022] And, a wireless transmission signal anti-interference test method, using the wireless transmission signal anti-interference device as described above to test the anti-interference ability of a Bluetooth headset, comprising:

[0023] Place a mobile terminal and a Bluetooth headset in a test device, and establish a wireless connection between the mobile terminal and the Bluetooth headset, so that the Bluetooth headset can normally receive the wireless signal sent by the mobile terminal and convert it into a sound signal;

[0024] The main control device controls the signal generating device to generate interference signals according to the input test conditions;

[0025] The signal generating device transmits the interference signal to the test device, and in the test shielding box, the interference signal becomes the interference source;

[0026] The signal acquisition device collects interference signals and sound signals in the test shielding box, converts the sound signals into audio signals, and then transmits the interference signals and audio signals to the main control device;

[0027] The main control device analyzes the parameter values ​​of the interference signal and the audio signal, generates a change characteristic curve of the audio signal, and analyzes the anti-interference ability of the Bluetooth headset to interference signals with different frequency spectra and amplitudes.

[0028] Furthermore, the specific steps of the main control device controlling the signal generating device to generate the interference signal according to the input test condition include:

[0029] A plurality of programmable signal generators, frequency band filters, programmable attenuators, signal synthesis equipment, power dividers and radio frequency amplifiers connected in sequence generate interference signals;

[0030] The main control device controls the programmable signal generator and the programmable attenuator, and adjusts the parameter value of the interference signal to make the interference signal controllable and adjustable.

[0031] Furthermore, the main control device analyzes the parameter values ​​of the interference signal and the audio signal, generates a change characteristic curve of the audio signal, and analyzes the anti-interference ability of the Bluetooth headset to interference signals of different spectra and amplitudes. The specific steps include:

[0032] Collect the intensity value of the interference signal corresponding to the jamming phenomenon of the audio signal of the Bluetooth headset;

[0033] According to the corresponding relationship between the minimum value to the saturation value of the audio signal at which the audio signal freezes and the strength value of the interference signal, a change characteristic curve of the audio signal is obtained;

[0034] The change curve of the received audio signal is mathematically transformed to obtain the anti-interference characteristic curve of the Bluetooth headset, and the anti-interference ability of the Bluetooth headset is evaluated based on the anti-interference characteristic curve.

[0035] In the above-mentioned wireless transmission signal anti-interference test equipment and method, the signal generating device is under the control of the main control device, and the interference signal spectrum, amplitude, intensity and other parameter values ​​generated by the signal generating device are controllable and adjustable, and the signal has high stability and good linearity. The test equipment provides a closed test environment, and simulates various usage scenarios such as movement, rotation, or swing of mobile terminals and Bluetooth headsets inside, so that the entire test environment and the interference signal used for testing are in a controllable state, and the same product can be repeatedly tested multiple times, which can not only judge and evaluate the performance of the product, but also be used to analyze and find problems. At the same time, the signal acquisition device collects test information from the test equipment, and the main control device analyzes and processes it. Through data calculation, the anti-interference characteristic curves of different products are obtained, and the test results and performance data analysis results of the products are obtained intuitively and clearly. The method of the present invention is simple, easy to implement, low-cost, and easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of a wireless transmission signal anti-interference test device according to an embodiment of the present invention (single channel).

[0037] Figure 2 It is a structural schematic diagram of a wireless transmission signal anti-interference test device (multi-channel) according to an embodiment of the present invention.

[0038] Figure 3 It is a software structure block diagram of the wireless transmission signal anti-interference testing method according to an embodiment of the present invention.

[0039] Figure 4 It is a schematic diagram of the frequency spectrum change of the interference signal generated by the signal generating device according to the embodiment of the present invention.

[0040] Figure 5 It is a schematic diagram of signal strength variation of an interference signal generated by a signal generating device according to an embodiment of the present invention.

[0041] Figure 6 It is a schematic diagram of the audio signal of the Bluetooth headset according to the embodiment of the present invention when the freezing phenomenon occurs.

[0042] Figure 7 This is a single freeze curve diagram of different Bluetooth headsets under the action of the same interference signal according to an embodiment of the present invention.

[0043] Figure 8 It is a characteristic curve diagram obtained by calculation after multiple measurements of different Bluetooth headsets in an embodiment of the present invention. DETAILED DESCRIPTION

[0044] This embodiment takes a wireless transmission signal anti-interference test device and method as an example, and the present invention will be described in detail below in conjunction with specific embodiments and drawings.

[0045] See also Figure 1 and Figure 2 , showing a wireless transmission signal anti-interference test device 100 provided by an embodiment of the present invention, which is used to test the anti-interference capability of a Bluetooth headset 300, including a main control device 40, a signal generating device 20, a test device 10 and a signal acquisition device 30:

[0046] Wherein, the signal generating device 20 is used to generate an interference signal with an adjustable parameter value;

[0047] The test device 10 is used to simulate the interference environment encountered by the Bluetooth headset 300 during use. The mobile terminal 200 and the Bluetooth headset 300 are placed in the test device 10 to test the anti-interference ability of the Bluetooth headset 300 in an environment where interference signals with different spectra and different amplitude values ​​exist;

[0048] The signal acquisition device 30 is used to collect the parameter values ​​of the interference signal inside the test device 10 and the audio signal output by the Bluetooth headset 300 in real time;

[0049] The main control device 40 is used to generate a control signal to control and adjust the parameter value of the interference signal generated by the signal generating device 20 so that it meets the test requirements. At the same time, the interference signal collected in the test device 10 and the audio signal output by the Bluetooth headset 300 are analyzed to obtain a characteristic curve characterizing the anti-interference ability of the Bluetooth headset 300.

[0050] Furthermore, the signal generating device 20 includes a multi-channel programmable signal generator 21, at least one frequency band filter 22, at least one programmable attenuator 23, a signal synthesizing device 24, a power divider 25 and at least one radio frequency amplifier 26 connected in sequence, wherein the control ends of the multi-channel programmable signal generator 21 and the programmable attenuator 23 are connected to the main control device 40, and are controlled and adjusted by the main control device 40. The multi-channel programmable signal generator 21 has one or more first signal output terminals, each of which is connected to the second signal input terminal of a frequency band filter 22, each of which is connected to the third signal input terminal of a programmable attenuator 23, and the third signal output terminals of the multiple programmable attenuators 23 are connected to the fourth signal input terminal of a signal synthesizer 24, and the fourth signal output terminal of the signal synthesizer 24 is connected to the fifth signal input terminal of the power divider 25. The power divider 25 has multiple fifth signal output terminals, and each of the fifth signal output terminals of the power divider 25 is respectively connected to the sixth signal input terminal of a radio frequency amplifier 26, and each of the sixth signal output terminals of the radio frequency amplifier 26 is connected to a test device 10.

[0051] Furthermore, the number of the first signal output terminals of the multi-channel programmable signal generator 21, the number of the frequency band filters 22 and the number of the programmable attenuators 23 are consistent and connected in a one-to-one correspondence.

[0052] Specifically, the multi-channel programmable signal generator 21, under the control of the main control device 40, sends out a multi-channel interference signal source; the frequency band filter 22 selects the frequency band of the original interference signal generated by the multi-channel programmable signal generator 21, and filters out the interference noise in the original interference signal; the programmable attenuator 23 is used to attenuate the power of the original interference signal. Under the control of the main control device 40, the programmable attenuator 23 switches the attenuation value of the programmable attenuator 23 without interruption to meet the input power requirements of subsequent devices; the signal synthesis device 24 synthesizes the original interference signals of different frequency bands output by each of the programmable attenuators 23 into a composite interference signal with multiple different frequency band signals; the power divider 25 divides one input composite interference signal into multiple interference signals; the RF amplifier 26 amplifies the power of the interference signal sent by the previous device to obtain sufficient RF output power for easy feeding through the antenna.

[0053] Specifically, in this embodiment, the multi-channel programmable signal generator 21 has three signal output terminals, which are respectively connected to the three frequency band filters 22, each of which is correspondingly connected to one of the programmable attenuators 23, and the signal synthesis device 24 combines the interference signals output by the three programmable attenuators 23 to generate a composite interference signal. In this embodiment, the power divider 25 has four signal output terminals, which are respectively connected to one of the radio frequency amplifiers 26 to amplify the power of the interference signal.

[0054] In other embodiments, the number of signal output terminals of the multi-channel programmable signal generator 21, the frequency band filters 22, the programmable attenuators 23, and the RF amplifiers 26 may be the same or different, as long as the test requirements are met.

[0055] Specifically, in this embodiment, the frequency range of the interference signal is 2.4G~2.5G, which is the frequency range of the WIFI signal. It is used to simulate the impact of the WIFI signal on the Bluetooth signal during transmission in the same spatial environment. When the Bluetooth headset 300 receives the wireless signal sent by the mobile terminal 200, the anti-interference ability of the Bluetooth headset 300 is tested.

[0056] Furthermore, the test device 10 includes a sealed test shielding box and an interference antenna 27, a spectrum monitoring antenna 31, an earphone swing mechanism, and at least one sound collection device arranged in the test shielding box, wherein the interference antenna 27 is used to send the interference signal generated by the signal generating device 20, and the spectrum monitoring antenna 31 is used to receive the interference signal in the test shielding box with full frequency coverage. The earphone swing mechanism is used to drive the Bluetooth headset 300 to swing at a predetermined angle during testing.

[0057] Specifically, during the test, only the earphone swing mechanism drives the Bluetooth earphone 300 to swing, simulating various situations that the Bluetooth earphone 300 may encounter during use in a natural environment.

[0058] Furthermore, the signal acquisition device 30 includes an interference signal monitoring spectrum analyzer 32 and an audio signal acquisition device 3330, the input end of the interference signal monitoring spectrum analyzer 32 is connected to the spectrum monitoring antenna 31, the output end of the interference signal monitoring spectrum analyzer 32 is connected to the main control device 40, the input end of the audio signal acquisition device 3330 is connected to the plurality of sound acquisition devices, and the output end of the audio signal acquisition device 3330 is connected to the main control device 40.

[0059] Specifically, the interference signal monitoring spectrum analyzer 32 is used to analyze the spectrum structure of the interference signal collected by the spectrum monitoring antenna 31, and the audio signal collection device 3330 is used to transmit the signals collected by the multiple sound collection devices to the main control device 40.

[0060] Specifically, in this embodiment, the sound collection device is a microphone, which collects the sound emitted by the Bluetooth headset 300, converts it into a voltage signal and amplifies it. The audio signal collection device 3330 is used to convert the analog voltage signal output by the microphone into a digital signal and send it to the main control device 40.

[0061] In this embodiment, Figure 1 It is a single-channel wireless transmission signal anti-interference test device, and the signal synthesis device 24 and the power divider 25 are not required in the single-channel device. Figure 2 For multi-channel wireless transmission signal anti-interference testing equipment, the signal synthesis device 24 and the power distributor 25 are required to complete signal distribution in a single-channel device.

[0062] Also, see Figure 3 , a method for testing the anti-interference of wireless transmission signals is shown, and the anti-interference capability of the Bluetooth headset 300 is tested by using the anti-interference device of the wireless transmission signal as described above, including the following steps:

[0063] Step S10, placing the mobile terminal 200 and the Bluetooth headset 300 in the test device 10, and establishing a wireless connection between the mobile terminal 200 and the Bluetooth headset 300, so that the Bluetooth headset 300 can normally receive the wireless signal sent by the mobile terminal 200 and convert it into a sound signal.

[0064] Specifically, during the test, the mobile terminal 200 and the Bluetooth headset 300 are placed on the equipment mounting bracket in the test shielding box, a Bluetooth connection is established between the mobile terminal 200 and the Bluetooth headset 300, and the mobile terminal 200 sends a standard 1K signal to the Bluetooth headset 300, and the sound emitted by the Bluetooth headset 300 is recognized and received by the pickup.

[0065] In step S20 , the main control device 40 controls the signal generating device 20 to generate an interference signal according to the input test condition.

[0066] The step S20 further includes:

[0067] In step S21, the multi-channel programmable signal generator 21, the frequency band filter 22, the programmable attenuator 23, the signal synthesis device 24, the power divider 25 and the radio frequency amplifier 26 connected in sequence generate an interference signal.

[0068] In step S22, the main control device 40 controls the programmable signal generator 21 and the programmable attenuator 23 to adjust the parameter value of the interference signal so that the interference signal is controllable and adjustable.

[0069] Specifically, the frequency band of the interference signal generated by the signal generating device 20 is 2.4G~2.5G. Figure 4 and Figure 5 As shown, the strength of the interference signal is controlled by the main control device 40 and changes linearly.

[0070] Specifically, the interference signal finally generated is required to have high signal stability and good linearity.

[0071] In step S30, the signal generating device 20 transmits the interference signal to the testing device 10, and the interference signal becomes an interference source in the testing shielding box.

[0072] Specifically, the interference signal is emitted through the interference antenna 27 in the test shielding box, and the linearly changing interference signal interferes with the wireless signal transmitted between the mobile terminal 200 and the Bluetooth headset 300. As the signal strength of the interference signal gradually increases, the audio signal emitted by the Bluetooth headset 300 will be stuck, and the audio signal will become more and more serious as the signal strength of the interference signal increases, and eventually reach a saturation state, such as Figure 6 shown.

[0073] In step S40 , the signal acquisition device 30 acquires interference signals and sound signals in the test shielding box, converts the sound signals into audio signals, and then transmits the interference signals and audio signals to the main control device 40 .

[0074] Specifically, the interference signal monitoring spectrum analyzer 32 transmits the interference signal collected by the spectrum monitoring antenna 31 to the main control device 40 , and the audio signal acquisition device 3330 converts the sound signal collected by the microphone into an audio signal and then transmits it to the main control device 40 .

[0075] In step S50, the main control device 40 analyzes the parameter values ​​of the interference signal and the audio signal, generates a change characteristic curve of the audio signal, and analyzes the anti-interference capability of the Bluetooth headset 300 to interference signals of different spectra.

[0076] The step S60 further includes:

[0077] Step S51, collecting the strength value of the interference signal corresponding to the jamming phenomenon of the audio signal of the Bluetooth headset 300;

[0078] Step S52, obtaining a change characteristic curve of the audio signal according to the correspondence between the minimum value to the saturation value at which the audio signal freezes and the strength value of the interference signal;

[0079] Step S53, performing mathematical transformation on the change curve of the received audio signal to obtain the anti-interference characteristic curve of the Bluetooth headset 300, and evaluating the anti-interference capability of the Bluetooth headset 300 according to the anti-interference characteristic curve.

[0080] Specifically, see Figure 7 , showing a single freeze change curve of different Bluetooth headsets 300 under the action of an interference signal. The freeze change in the audio signal is proportional to the signal strength of the interference signal. When the signal strength of the interference signal reaches a certain strength value, the audio signal begins to freeze. As the signal strength of the interference signal further increases, the freeze of the audio signal reaches a saturation state.

[0081] Specifically, see Figure 8 , showing the anti-interference characteristic curves of different Bluetooth headsets 300 calculated after multiple measurements. Figure 7 By mathematically transforming the change curve of the audio signal in the Bluetooth headset 300, the anti-interference characteristic curve of the Bluetooth headset 300 can be obtained. The anti-interference ability of the Bluetooth headset 300 is different, and the signal strength of the corresponding interference signal when the jamming phenomenon occurs is different, and the position of the characteristic curve is also different. The anti-interference ability of the Bluetooth headset 300 can be intuitively judged through the anti-interference characteristic curve of the Bluetooth headset 300. The greater the signal strength of the corresponding interference signal in the anti-interference characteristic curve and the later the position of the curve, the stronger its anti-interference ability.

[0082] In the above-mentioned wireless transmission signal anti-interference test device 100 and method, the signal generating device 20, under the control of the main control device 40, generates interference signal spectrum, amplitude, intensity and other parameter values ​​that are controllable and adjustable, and the signal has high stability and good linearity. The test device 10 provides a closed test environment, and simulates various usage scenarios such as movement, rotation, or swing of the mobile terminal 200 and the Bluetooth headset 300, so that the entire test environment and the interference signal used for the test are in a controllable state, and the same product can be repeatedly tested multiple times, which can not only judge and evaluate the performance of the product, but also be used to analyze and find problems. At the same time, the signal acquisition device 30 collects test information from the test device 10, and the main control device 40 analyzes and processes it. Through data calculation, the anti-interference characteristic curves of different products are obtained, and the test results and performance data analysis results of the product are obtained intuitively and clearly. The method of the present invention is simple, easy to implement, low-cost, and easy to promote.

[0083] It should be noted that the present invention is not limited to the above-mentioned embodiments. Based on the creative spirit of the present invention, those skilled in the art may also make other changes. These changes made based on the creative spirit of the present invention should be included in the scope of protection required by the present invention.

Claims

1. A wireless transmission signal anti-interference test device, used to test the anti-interference ability of Bluetooth headsets, characterized in that: Including main control equipment, signal generating equipment, testing equipment and signal acquisition equipment: Wherein, the signal generating device is used to generate an interference signal with an adjustable parameter value; The test device is used to simulate the interference environment encountered by the Bluetooth headset during use. The mobile terminal and the Bluetooth headset are placed in the test device to test the anti-interference ability of the Bluetooth headset in an environment where interference signals with different spectra and different amplitude values ​​exist; The signal acquisition device is used to collect the interference signal inside the test device and the sound signal output by the Bluetooth headset in real time; The main control device is used to generate a control signal to control and adjust the parameter value of the interference signal generated by the signal generating device to meet the test requirements, and at the same time analyze the interference signal collected in the test device and the audio signal output by the Bluetooth headset to obtain a characteristic curve characterizing the anti-interference ability of the Bluetooth headset; The signal generating device comprises a multi-channel programmable signal generator, at least one frequency band filter, at least one programmable attenuator, a signal synthesizing device, a power divider and at least one radio frequency amplifier connected in sequence, wherein the control ends of the multi-channel programmable signal generator and the programmable attenuator are connected to the main control device and controlled and adjusted by the main control device; The test equipment includes a sealed test shielding box and an interference antenna, a spectrum monitoring antenna, and at least one sound collection device arranged in the test shielding box, wherein the interference antenna is used to send the interference signal generated by the signal generating device, and the spectrum monitoring antenna is used to receive the interference signal in the test shielding box with full frequency band coverage; The signal acquisition device comprises an interference signal monitoring spectrum analyzer and an audio signal acquisition device, wherein the input end of the interference signal monitoring spectrum analyzer is connected to the spectrum monitoring antenna, the output end of the interference signal monitoring spectrum analyzer is connected to the main control device, the input end of the audio signal acquisition device is connected to at least one of the sound acquisition devices, and the output end of the audio signal acquisition device is connected to the main control device; The main control device collects the intensity value of the interference signal corresponding to the jamming phenomenon of the sound signal of the Bluetooth headset; and obtains the change characteristic curve of the audio signal according to the correspondence between the minimum value to the saturation value of the audio signal jamming and the intensity value of the interference signal; The main control device analyzes the parameter values ​​of the interference signal and the audio signal, generates a change characteristic curve of the audio signal, and analyzes the anti-interference ability of the Bluetooth headset to interference signals of different spectra; The test shielding box is also provided with an earphone swing mechanism, which is used to drive the Bluetooth earphone to swing at a predetermined angle during testing; It also includes a wireless transmission signal anti-interference test method based on a wireless transmission signal anti-interference test device, using the wireless transmission signal anti-interference device to test the anti-interference ability of a Bluetooth headset, and the specific steps include: Place a mobile terminal and a Bluetooth headset in a test device, and establish a wireless connection between the mobile terminal and the Bluetooth headset, so that the Bluetooth headset can normally receive the wireless signal sent by the mobile terminal and convert it into a sound signal; The main control device controls the signal generating device to generate interference signals according to the input test conditions; The signal generating device transmits the interference signal to the test device, and in the test shielding box, the interference signal becomes the interference source; The signal acquisition device collects interference signals and sound signals in the test shielding box, converts the sound signals into audio signals, and then transmits the interference signals and audio signals to the main control device; The main control device analyzes the parameter values ​​of the interference signal and the audio signal, generates a change characteristic curve of the audio signal, and analyzes the anti-interference ability of the Bluetooth headset to interference signals of different spectra; The specific steps of the main control device parsing the parameter values ​​of the interference signal and the audio signal, generating a change characteristic curve of the audio signal, and analyzing the anti-interference ability of the Bluetooth headset to interference signals of different spectra include: Collect the intensity value of the interference signal corresponding to the jamming phenomenon of the sound signal of the Bluetooth headset; According to the corresponding relationship between the minimum value to the saturation value of the audio signal at which the audio signal freezes and the strength value of the interference signal, a change characteristic curve of the audio signal is obtained; The change curve of the received audio signal is mathematically transformed to obtain the anti-interference characteristic curve of the Bluetooth headset, and the anti-interference ability of the Bluetooth headset is evaluated based on the anti-interference characteristic curve.

2. The wireless transmission signal anti-interference test equipment according to claim 1, characterized in that: The multi-channel programmable signal generator has one or more first signal output terminals, each of which is connected to the second signal input terminal of a frequency band filter, the second signal output terminal of each frequency band filter is connected to the third signal input terminal of a programmable attenuator, the third signal output terminals of multiple programmable attenuators are connected to the fourth signal input terminal of a signal synthesizer, the fourth signal output terminal of the signal synthesizer is connected to the fifth signal input terminal of the power divider, the power divider has multiple fifth signal output terminals, the fifth signal output terminal of each power divider is respectively connected to the sixth signal input terminal of a radio frequency amplifier, and the sixth signal output terminal of each radio frequency amplifier is connected to one of the test devices.

3. The wireless transmission signal anti-interference test equipment according to claim 2, characterized in that: The number of the first signal output terminals of the multi-channel programmable signal generator, the number of the frequency band filters and the number of the programmable attenuators are consistent and connected in a one-to-one correspondence.

4. The wireless transmission signal anti-interference testing device according to claim 1, characterized in that: The specific steps of the main control device controlling the signal generating device to generate the interference signal according to the input test condition include: A plurality of programmable signal generators, frequency band filters, programmable attenuators, signal synthesis equipment, power dividers and radio frequency amplifiers connected in sequence generate interference signals; The main control device controls the programmable signal generator and the programmable attenuator, and adjusts the parameter value of the interference signal to make the interference signal controllable and adjustable.

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