Abnormal Self-Detection Method, System, Device and Medium for PIS Broadcasting System

Abstract

The present invention discloses an abnormal self-detection method, system, device and medium for a PIS broadcast system. The method includes controlling the first speaker and microphone to work, and according to the first preset sound acquisition strategy, controlling the microphone to collect the first sound signal, and judging whether the first broadcast device is abnormal according to the first sound signal; when the first broadcast device is abnormal, performing abnormal positioning according to the detected first line current of the first broadcast device; when the first broadcast device is normal, judging whether the second broadcast device is abnormal according to the detected second line current; when an abnormality occurs, controlling the second speaker and microphone to work respectively, and according to the second preset sound acquisition strategy, controlling the microphone to collect the second sound signal, and performing abnormal positioning on the second broadcast device according to the second sound signal. The present invention can respectively realize the abnormal self-detection and abnormal positioning of two kinds of broadcast devices, with high reliability and helpful for subsequent maintenance.

Description

Technical Field

[0001] The present invention relates to the technical field of rail transit, and particularly relates to an abnormal self-detection method, system, device and medium for a PIS broadcast system. Background Art

[0002] PIS (Passenger Information System) is the passenger information system. The on-vehicle PIS system is a system that integrates a media display system, a broadcast system, and a video monitoring system and is dedicated to the rail transit industry. It mainly relies on multimedia network technology, takes an embedded computer system as the core, and uses on-vehicle display terminals and speakers as media to provide information services to passengers.

[0003] In the on-vehicle PIS system, the broadcast system mainly includes a broadcast control box in the driver's cab and a passenger emergency alarm in the passenger compartment. Microphones and speakers are provided inside these devices. The broadcast system also includes speakers separately arranged in the passenger compartment, etc. These devices all play crucial roles. During the passenger's journey, the broadcast system is used to achieve voice communication between the driver and the passengers, convey train operation information (including arrival time, departure time, etc.) and various notice information (such as temporary suspension, line adjustment, etc.), safety reminder information (such as "Please wait outside the yellow safety line", etc.) and other broadcast information to the passengers.

[0004] In the actual application of the on-vehicle PIS system, through the abnormal self-detection of the broadcast system, it has the advantages of ensuring operation safety, improving service quality, reducing maintenance costs, and improving management efficiency. The existing abnormal detection of the broadcast system usually judges whether the function of the broadcast system is abnormal by the presence or absence of sound in the microphone and the speaker. However, when the broadcast system has an abnormality, it is impossible to locate the specific malfunctioning speaker or microphone, which is not conducive to subsequent maintenance. Therefore, the reliability of the existing abnormal detection technology for the PIS broadcast system is relatively low. Summary of the Invention

[0005] In view of this, the present invention provides an abnormal self-detection method, system, device and medium for a PIS broadcast system to solve the problem that the low reliability of the existing abnormal detection technology for the PIS broadcast system is not conducive to maintenance.

[0006] The present invention provides an abnormal self-detection method for a PIS broadcast system. The PIS broadcast system includes a first broadcast device and a second broadcast device. The first broadcast device includes a microphone and a first speaker, and the second broadcast device includes a plurality of second speakers. Each of the second speakers is within the sound collection range of the microphone; wherein, both the first broadcast device and the second broadcast device are configured with current detection modules;

[0007] The method includes:

[0008] In the first broadcast device, the first speaker and the microphone are respectively controlled to work, and according to a first preset sound acquisition strategy, the microphone is controlled to acquire a first sound signal, and whether the first broadcast device is abnormal is judged according to the first sound signal;

[0009] When the first broadcast device is abnormal, the first line current of the first broadcast device is detected in real time by using the current detection module configured corresponding to the first broadcast device; and according to the detected first line current, the first broadcast device is subjected to abnormal positioning, and a first abnormal positioning detection result is output;

[0010] When the first broadcast device is normal, the second line current of the second broadcast device is detected in real time by using the current detection module configured corresponding to the second broadcast device; and according to the detected second line current, whether the second broadcast device is abnormal is judged; when the second broadcast device is abnormal, the second speaker and the microphone are respectively controlled to work, and according to a second preset sound acquisition strategy, the microphone is controlled to acquire a second sound signal, and the second broadcast device is subjected to abnormal positioning according to the acquired second sound signal, and a second abnormal positioning detection result is output.

[0011] Optionally, the first sound signal includes a first sub-signal and a second sub-signal;

[0012] In the first broadcast device, the first speaker and the microphone are respectively controlled to work, and according to a first preset sound acquisition strategy, the microphone is controlled to acquire a first sound signal, and whether the first broadcast device is abnormal is judged according to the first sound signal, including:

[0013] In the first broadcast device, the microphone is controlled to work to acquire the first sub-signal; wherein, the first sub-signal is the first ambient sound when no speaker emits sound in the environment where the microphone is located;

[0014] The first speaker is controlled to work to output a processed specific audio signal; wherein, the specific audio signal is specifically an audio signal with a preset frequency and a preset intensity;

[0015] The microphone is controlled to work to acquire the second sub-signal; wherein, the second sub-signal is the sound synthesized by the processed specific audio signal output by the first speaker and the first ambient sound in the environment where the microphone is located;

[0016] Compare the second sub-signal with the specific audio signal; if the second sub-signal and the specific audio signal meet the first preset criterion, it is determined that the first broadcast device is abnormal; otherwise, it is determined that the first broadcast device is normal.

[0017] Optionally, the processed specific audio signal is specifically the sound after performing a difference operation on the specific audio signal and the first ambient sound.

[0018] Optionally, the first preset criterion is specifically:

[0019] The absolute value of the intensity difference between the second sub-signal and the specific audio signal exceeds a first preset threshold.

[0020] Optionally, before controlling the first speaker to work and output the processed specific audio signal, the method further includes:

[0021] Calibrate the specific audio signal.

[0022] Optionally, when the first broadcast device is normal, it has a first preset loop current value; the first abnormal location detection result includes that the first speaker in the first broadcast device fails and the microphone in the first broadcast device fails;

[0023] Perform abnormal location on the first broadcast device according to the detected first line current, and output a first abnormal location detection result, including:

[0024] Compare the detected first line current with the first preset loop current value;

[0025] If the comparison is inconsistent, it is determined that the first abnormal location detection result is that the first speaker in the first broadcast device fails; otherwise, it is determined that the first abnormal location detection result is that the microphone in the first broadcast device fails.

[0026] Optionally, when the second broadcast device is normal, it has a second preset loop current value;

[0027] Judge whether the second broadcast device is abnormal according to the detected second line current, including:

[0028] Compare the detected second line current with the second preset loop current value;

[0029] If the comparison is inconsistent, it is determined that the second broadcast device is abnormal; otherwise, it is determined that the second broadcast device is normal.

[0030] Optionally, the second sound signal includes a third sub-signal and a plurality of fourth sub-signals, where the number of the fourth sub-signals is the same as that of the second speakers, and all the fourth sub-signals correspond to all the second speakers one by one;

[0031] When the second broadcasting device has an abnormality, control the second speaker and the microphone to work respectively, and according to a second preset sound acquisition strategy, control the microphone to acquire a second sound signal, and perform abnormality positioning on the second broadcasting device according to the acquired second sound signal, and output a second abnormality positioning detection result, including:

[0032] Control the microphone in the first broadcasting device to work and acquire the third sub-signal; where the third sub-signal is the second ambient sound when no speaker emits sound in the environment where the microphone is located;

[0033] Control each second speaker in the second broadcasting device to work and output a processed specific audio signal respectively; where the specific audio signal is specifically an audio signal with a preset frequency and a preset intensity;

[0034] Control the microphone in the first broadcasting device to work and acquire each fourth sub-signal respectively; where the fourth sub-signal is the sound synthesized by the processed specific audio signal output by the corresponding second speaker and the second ambient sound in the environment where the microphone is located;

[0035] Compare each fourth sub-signal with the specific audio signal respectively; if the fourth sub-signal and the specific audio signal meet a second preset criterion, determine that the second abnormality positioning detection result is that the second speaker corresponding to the fourth sub-signal has an abnormality.

[0036] Optionally, before controlling the microphone in the first broadcasting device to work and acquire the third sub-signal, the method further includes:

[0037] Calibrate the specific audio signal.

[0038] Optionally, the processed specific audio signal is specifically the sound after performing a difference operation on the specific audio signal and the second ambient sound.

[0039] Optionally, the second preset criterion is specifically:

[0040] The absolute value of the intensity difference between the fourth sub-signal and the specific audio signal exceeds a second preset threshold.

[0041] In addition, the present invention also provides an abnormal self-detection system for a PIS broadcast system, which is applied to the abnormal self-detection method of the foregoing PIS broadcast system. The PIS broadcast system includes a first broadcast device and a second broadcast device. The first broadcast device includes a microphone and a first speaker, and the second broadcast device includes a plurality of second speakers, and each of the second speakers is within the sound collection range of the microphone. Wherein, both the first broadcast device and the second broadcast device are configured with current detection modules;

[0042] It includes:

[0043] A first abnormal detection unit, which is used to control the first speaker and the microphone to work respectively in the first broadcast device, and control the microphone to collect a first sound signal according to a first preset sound collection strategy, and judge whether the first broadcast device is abnormal according to the first sound signal;

[0044] A first abnormal positioning unit, which is used to, when the first abnormal detection unit detects that the first broadcast device is abnormal, use the current detection module corresponding to the first broadcast device to detect the first line current of the first broadcast device in real time; and perform abnormal positioning on the first broadcast device according to the detected first line current, and output a first abnormal positioning detection result;

[0045] A second abnormal detection unit, which is used to, when the first abnormal detection unit detects that the first broadcast device is normal, use the current detection module corresponding to the second broadcast device to detect the second line current of the second broadcast device in real time; and judge whether the second broadcast device is abnormal according to the detected second line current;

[0046] A second abnormal positioning unit, which is used to, when the second abnormal detection unit detects that the second broadcast device is abnormal, control the second speaker and the microphone to work respectively, and control the microphone to collect a second sound signal according to a second preset sound collection strategy, and perform abnormal positioning on the second broadcast device according to the collected second sound signal, and output a second abnormal positioning detection result.

[0047] In addition, the present invention also provides an abnormal self-detection device for a PIS broadcast system. The PIS broadcast system includes a first broadcast device and a second broadcast device. The first broadcast device includes a microphone and a first speaker, and the second broadcast device includes a plurality of second speakers, and each of the second speakers is within the sound collection range of the microphone;

[0048] It includes:

[0049] At least two current detection modules respectively corresponding to the first broadcast device and the second broadcast device; the current detection module corresponding to the first broadcast device is used to detect the first line current in the first broadcast device corresponding to it in real time, and the current detection module corresponding to the second broadcast device is used to detect the second line current in the second broadcast device corresponding to it in real time;

[0050] The abnormal self-detection system of the aforementioned PIS broadcast system is communicatively connected to the microphone, the first speaker, all the second speakers, and all the current detection modules;

[0051] The abnormal self-detection system of the PIS broadcast system is used for:

[0052] In the first broadcast device, control the first speaker and the microphone to work respectively, and according to the first preset sound acquisition strategy, control the microphone to acquire the first sound signal, and judge whether the first broadcast device is abnormal according to the first sound signal;

[0053] When the first broadcast device is abnormal, receive the first line current detected by the current detection module corresponding to the first broadcast device; and according to the first line current, perform abnormal positioning on the first broadcast device and output the first abnormal positioning detection result;

[0054] When the first broadcast device is normal, receive the second line current detected by the current detection module corresponding to the second broadcast device; and judge whether the second broadcast device is abnormal according to the second line current; when the second broadcast device is abnormal, control the second speaker and the microphone to work respectively, and according to the second preset sound acquisition strategy, control the microphone to acquire the second sound signal, and perform abnormal positioning on the second broadcast device according to the acquired second sound signal, and output the second abnormal positioning detection result.

[0055] In addition, the present invention also provides a computer storage medium, which includes: at least one instruction, and when the instruction is executed, the method steps in the abnormal self-detection method of the aforementioned PIS broadcast system are realized.

[0056] The beneficial effects of the present invention:

[0057] The broadcast devices in the PIS broadcast system include two types. The first is the first broadcast device that has both a microphone function and a speaker function, and the second is the second broadcast device that only has a speaker function. For the first broadcast device, it directly collects the first sound signal according to the first preset sound collection strategy through its own microphone to realize its own abnormal self-detection. When it is abnormal itself, since it may be that the microphone is abnormal or the first speaker is abnormal, the first line current detected by the configured current detection module is combined to realize abnormal positioning and output the corresponding first abnormal positioning detection result. It can realize both abnormal detection and abnormal positioning only through its own device structure. For the second broadcast device, since it only includes the second speaker, first, it determines whether the external line loop of the entire second broadcast device is abnormal through the second line current detected by the configured current detection module, and then determines whether there is a fault in the second speaker in the second broadcast device to realize the abnormal detection of this type of broadcast device. When the external line loop of the second broadcast device is abnormal, that is, when the second speaker fails, since the second speaker is within the sound collection range of the microphone in the first broadcast device, at this time, the microphone in the first broadcast device is used to collect the second sound signal according to the second preset sound collection strategy respectively, and based on the analysis of the second sound signal collected by the microphone, the abnormal positioning of the second broadcast device can also be realized. Similarly, only by using the device structure of the PIS broadcast system itself, both abnormal detection and abnormal positioning are realized.

[0058] The abnormal self-detection method, system, device and medium of the PIS broadcast system of the present invention can respectively realize the abnormal self-detection and abnormal positioning of the two types of broadcast devices based on the device structure of the broadcast devices in the PIS broadcast system, accurately locate the faulty microphone or speaker when an abnormality occurs, and thus can effectively improve the reliability of the abnormal detection of the PIS broadcast system, which is helpful for subsequent maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] The features and advantages of the present invention will be more clearly understood by referring to the accompanying drawings. The drawings are schematic and should not be construed as limiting the present invention in any way. In the drawings:

[0060] Figure 1 The flowchart of an abnormal self-detection method of a PIS broadcast system in Embodiment 1 of the present invention is shown;

[0061] Figure 2 The structural block diagram of an in-vehicle PIS system in Embodiment 1 of the present invention is shown;

[0062] Figure 3 The layout structure diagram of the broadcast devices in the driver's cab and the passenger compartment in Embodiment 1 of the present invention is shown;

[0063] Figure 4 The internal structure diagram of the broadcast device in the first embodiment of the present invention is shown;

[0064] Figure 5 The layout schematic diagram of the current detection module in the broadcast device in the first embodiment of the present invention is shown;

[0065] Figure 6 The structure diagram of the abnormal self-detection system of a PIS broadcast system in the second embodiment of the present invention is shown;

[0066] Figure 7 The structure diagram of the abnormal self-detection device of a PIS broadcast system in the third embodiment of the present invention is shown. Detailed implementation manners

[0067] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0068] Embodiment 1

[0069] An abnormal self-detection method for a PIS broadcast system, the PIS broadcast system includes a first broadcast device and a second broadcast device, the first broadcast device includes a microphone and a first speaker, the second broadcast device includes a plurality of second speakers, and each of the second speakers is within the sound collection range of the microphone; wherein, both the first broadcast device and the second broadcast device are configured with a current detection module;

[0070] As Figure 1 shown, the method includes:

[0071] S1: In the first broadcast device, control the first speaker and the microphone to work respectively, and according to a first preset sound collection strategy, control the microphone to collect a first sound signal, and judge whether the first broadcast device is abnormal according to the first sound signal;

[0072] S2A: When the first broadcast device is abnormal, use the current detection module configured corresponding to the first broadcast device to detect the first line current of the first broadcast device in real time; and according to the detected first line current, perform abnormal positioning on the first broadcast device, and output a first abnormal positioning detection result;

[0073] S2B: When the first broadcast device is normal, use the current detection module configured corresponding to the second broadcast device to detect the second line current of the second broadcast device in real time; and determine whether the second broadcast device is abnormal according to the detected second line current; when the second broadcast device is abnormal, control the second speaker and the microphone to work respectively, and control the microphone to collect the second sound signal according to the second preset sound collection strategy, and perform abnormal positioning on the second broadcast device according to the collected second sound signal, and output the second abnormal positioning detection result.

[0074] In this embodiment, the PIS broadcast system includes two types of broadcast devices. The first type is the first broadcast device that has both a microphone function and a speaker function. The first broadcast device includes a broadcast control box in each driver's cab of rail transit vehicles (such as buses, subways, bullet trains, high-speed trains, etc.) and a passenger emergency alarm in each passenger compartment. Among them, the broadcast control box in the driver's cab is divided into a main broadcast control box and an auxiliary broadcast control box (since the main broadcast control box is the control box that plays the main function, the broadcast control box in this embodiment mainly refers to the main broadcast control box). Both the main broadcast control box and the passenger emergency alarm in the passenger compartment are configured with a microphone and a first speaker, as Figure 2 shown (where Figure 2 only shows the connection relationship between one passenger compartment and the driver's cab, and the structures of other passenger compartments are similar to this, and the adjacent passenger compartments and the last passenger compartment and the driver's cab are all communicated with each other through a switch; in addition, Figure 2 the microphones and first speakers in the passenger emergency alarm are not shown). The broadcast control box in the driver's cab interacts with the driver's cab control host, and the passenger emergency alarm in the passenger compartment interacts with the passenger compartment control host, as Figure 3 shown (where, for the convenience of display, Figure 3 the microphones in are all omitted and not shown). The second type is the second broadcast device that only has a speaker function. The second broadcast device includes a second speaker in each passenger compartment of the rail transit vehicle, as Figure 2 shown.

[0075] For the first type of broadcast device, it directly collects the first sound signal according to the first preset sound collection strategy through its own microphone to achieve its own abnormal self-detection; when it is abnormal itself, since it may be the microphone that is abnormal or the first speaker that is abnormal, therefore, combined with the first line current detected by the configured current detection module, it can achieve abnormal positioning and output the corresponding first abnormal positioning detection result. It can achieve both abnormal detection and abnormal positioning only through its own device structure; for the second type of broadcast device, since it only includes a second speaker, first, it determines whether the external line loop of the entire second broadcast device is abnormal through the second line current detected by the configured current detection module, and then determines whether there is a second speaker failure in the second broadcast device to achieve the abnormal detection of this type of broadcast device; when the external line loop of the second broadcast device is abnormal, that is, when there is a second speaker failure, since the second speaker is within the sound collection range of the microphone in the first broadcast device, at this time, the microphone in the first broadcast device is used to collect the second sound signal according to the second preset sound collection strategy respectively, and based on the analysis of the second sound signal collected by the microphone, the abnormal positioning of the second broadcast device can also be achieved. Similarly, only using the device structure of the PIS broadcast system itself, both abnormal detection and abnormal positioning are achieved.

[0076] The abnormal self-detection method of the PIS broadcast system in this embodiment can, based on the device structure of the broadcast device itself in the PIS broadcast system, respectively achieve the abnormal self-detection and abnormal positioning of the two types of broadcast devices, accurately locate the faulty microphone or speaker when an abnormality occurs, and thus can effectively improve the reliability of the abnormal detection of the PIS broadcast system, which is helpful for subsequent maintenance.

[0077] In this embodiment, the internal structure of the first broadcast device (i.e., the broadcast control box and the passenger emergency alarm) is as Figure 4 shown, and it can achieve the functions of collecting sound and emitting sound corresponding to the broadcast control box and the passenger emergency alarm (i.e., realizing the speaker function and the microphone function respectively). This type of broadcast device is also built-in with a controller. In Figure 4 , the first broadcast device can respectively control the microphone and the first speaker through the built-in controller. When the controller controls the microphone to collect sound, it is mainly achieved by controlling the audio signal collection module; when the controller controls the first speaker to emit sound, it is mainly achieved by controlling the power amplifier module.

[0078] There can be multiple first broadcast devices. For example, in Figure 2 , there are two driver's cabs, and each driver's cab is provided with a corresponding broadcast control box; in Figure 2 , there are also multiple passenger compartments ( Figure 2Only one passenger compartment is shown), and there are 4 passenger alarm devices in this passenger compartment. Each of the multiple first broadcast devices can perform its own anomaly detection and anomaly location according to the method described in steps S1 to S2A of this embodiment through its own microphone, first speaker, and correspondingly configured current detection module.

[0079] There are also usually multiple groups of second broadcast devices, such as Figure 2 In it, there are 2 groups of second speakers in the passenger compartment. In each group of second speakers, there are 4 second speakers connected in parallel. Both groups of second speakers are within the sound collection range of the microphone in at least one passenger emergency alarm device. Furthermore, each second speaker is within the sound collection range of the microphone in at least one passenger emergency alarm device. Each second broadcast device can perform anomaly detection and anomaly location through the microphone configured in the corresponding first passenger emergency alarm device and the correspondingly configured current detection module.

[0080] Next, each step of the anomaly self-detection method of the PIS broadcast system in this embodiment will be further described.

[0081] In step S1 of this embodiment, the first sound signal includes a first sub-signal and a second sub-signal.

[0082] Then S1 includes:

[0083] S11: In the first broadcast device, control the microphone to work and collect the first sub-signal; wherein, the first sub-signal is the first ambient sound when there is no sound emitted from any speaker in the environment where the microphone is located.

[0084] S12: Control the first speaker to work and output a processed specific audio signal; wherein, the specific audio signal is specifically an audio signal with a preset frequency and a preset intensity.

[0085] S13: Control the microphone to work and collect the second sub-signal; wherein, the second sub-signal is the sound synthesized by the processed specific audio signal output by the first speaker and the first ambient sound in the environment where the microphone is located.

[0086] S14: Compare the second sub-signal with the specific audio signal; if the second sub-signal and the specific audio signal meet the first preset criterion, it is determined that the first broadcast device is abnormal; otherwise, it is determined that the first broadcast device is normal.

[0087] During the abnormal detection process of the first broadcast device, first control the microphone to collect the first ambient sound when there is no sound emitted by any speaker, which can facilitate removing the influence of the ambient sound in subsequent comparative analysis. After collecting the first ambient sound (i.e., the first sub-signal), then control the first speaker to output a processed specific audio signal, which can facilitate collecting the second sub-signal after synthesizing this signal with the first ambient sound and comparing it with the specific audio signal, so as to analyze whether there is an abnormality in the first broadcast device. Finally, control the microphone to collect the second sub-signal. At this time, if neither the microphone nor the first speaker fails, the subsequent comparison situation of the sound signal should be consistent. If there is a device failure in the microphone and the first speaker, the comparison situation will be inconsistent. Therefore, in this embodiment, by collecting the first sound signal through the microphone, the abnormal detection of the first broadcast device can be accurately and efficiently realized directly using the comparison situation of the first sound signal.

[0088] Specifically, in S11~S14, the controller configured in the first broadcast device can be used to realize the operations of the microphone and the first speaker respectively. Among them, in S11, control the first speaker in it to be muted through the controller (at this time, in the environment where the microphone is located, no speaker emits sound).

[0089] Specifically, in S12, the processed specific audio signal is specifically the sound after performing a difference operation between the specific audio signal and the first ambient sound.

[0090] By performing a difference operation on the specific audio signal and the first ambient sound, it can be ensured that theoretically, the sound obtained after synthesizing the signal output by the first speaker and the ambient sound is exactly the specific audio signal. Furthermore, it is convenient to determine whether the second sub-signal collected by the microphone during the actual collection process is consistent with the specific audio signal in subsequent actual comparative analysis, so as to realize the abnormal detection of the first broadcast device.

[0091] Specifically, before S12, the method further includes:

[0092] Calibrate the specific audio signal.

[0093] Since in the entire PIS broadcast system, the installation positions of each broadcast device are different, the sound propagation areas will have overlapping coverage, and thus the intensities of the sound signals collected by each microphone will be different. Therefore, in this embodiment, by calibrating the specific audio signal first, it helps the microphones in subsequent devices to accurately collect the standard intensity corresponding to the second sub-signal at their respective positions, avoiding inaccurate abnormal positioning caused by different installation positions and having higher reliability. Among them, the calibration of the audio signal can adopt conventional methods, which is not limited here.

[0094] Specifically, in S14, the first preset criterion is specifically:

[0095] The absolute value of the intensity difference between the second sub-signal and the specific audio signal exceeds a first preset threshold.

[0096] When the absolute value of the intensity difference between the second sub-signal and the specific audio signal exceeds the first preset threshold, it indicates that the difference between the second sub-signal and the specific audio signal is large and they are inconsistent. Then there is an abnormality in the first broadcast device, which may be a malfunction of the microphone or a malfunction of the first speaker. In this embodiment, the comparison between the two sound signals is directly realized based on the intensity value of the sound signal, with high accuracy, in line with the actual situation of the broadcast device in the vehicle PIS system, and high reliability.

[0097] Specifically, the preset frequency and preset intensity of the specific audio signal in this embodiment and the first preset threshold in the first preset criterion can all be selected according to the actual situation and are not limited here.

[0098] Preferably, the first broadcast device has a first preset loop current value when normal; the first abnormal positioning detection result includes that the first speaker in the first broadcast device fails and the microphone in the first broadcast device fails;

[0099] Then in S2A of this embodiment, according to the detected first line current, the first broadcast device is abnormally positioned, and a first abnormal positioning detection result is output, including:

[0100] S2A1: Compare the detected first line current with the first preset loop current value;

[0101] S2A2: If the comparison is inconsistent, determine that the first abnormal positioning detection result is that the first speaker in the first broadcast device fails; otherwise, determine that the first abnormal positioning detection result is that the microphone in the first broadcast device fails.

[0102] In the first broadcast device, the first line current actually detected by the current detection module is compared with the corresponding first preset loop current value. If they are the same, it indicates that the first line current actually detected does not show an increase or decrease in current, and its fluctuation is normal. Then the first speaker is working properly, and the abnormality in the first broadcast device is caused by a malfunction of the microphone. That is, it can be determined that the first abnormal positioning detection result is that the microphone in the first broadcast device has a malfunction. If they are not the same, it indicates that the line current actually detected shows an increase or decrease in current, and its fluctuation is abnormal. Then the abnormality in the first broadcast device is caused by a malfunction of the first speaker. That is, it can be determined that the first abnormal positioning detection result is that the first speaker in the first broadcast device has a malfunction. Through the above method, the abnormal positioning of the first broadcast device can be efficiently and accurately achieved, with high reliability.

[0103] In this embodiment S2B, for the abnormality detection of the second broadcast device, first, the second line current is collected through the current detection module configured in the second broadcast device, and then it is determined whether the external line loop of the entire second broadcast device is abnormal, that is, whether there is a malfunction of the second speaker in the second broadcast device. Specifically, the current detection module is set on the parallel circuit of all second speakers and is respectively connected to the power amplifier module that realizes the speaker function in the second broadcast device and the car control host that realizes the control function (i.e., Figure 5 the controller in Figure 5 ), as shown in

[0104] The second line current collected by the current detection module can be used to determine whether the speaker line loop of the entire second broadcast device is normal, that is, whether there is a malfunction of the second speaker. Specifically, the speakers in the second broadcast device are connected in parallel. When the second line current is abnormal, such as when the second line current decreases, it may be that one or more of the second speakers have a malfunction such as a blown voice coil or a broken line, or the drive circuit of one or more of the second speakers has a malfunction. When the second line current is abnormal, such as when the line current increases, it may be that one or more of the second speakers have a short circuit malfunction.

[0105] Preferably, in this embodiment S2B, each of the second broadcast devices has a second preset loop current value when normal;

[0106] In S2B, according to the detected second line current, determining whether the second broadcast device has an abnormality includes:

[0107] S2B1: Comparing the detected second line current with the second preset loop current value;

[0108] S2B2: If the comparison is inconsistent, determine that the second broadcast device is abnormal; otherwise, determine that the second broadcast device is normal.

[0109] When the second broadcast device is normal, all the second speakers in it are also normal. Then the second broadcast device has a second preset loop current value, which refers to the total current when all the second speakers are working normally and can be calculated based on the rated current of all the second speakers ( I 总 = n × I i额 ), where I 总 refers to the total current (i.e., the preset loop current value) when all the second speakers in the second broadcast device are working normally, n refers to the total number of speakers in the second broadcast device, I i额 refers to the rated current when the i th second speaker in the second broadcast device is working normally.

[0110] In the second broadcast device, compare the second line current actually detected by the current detection module with the corresponding second preset loop current value. If they are consistent, it means that there is no phenomenon of current increase or decrease in the actually detected second line current and its fluctuation is normal, so all the second speakers are working normally and the second broadcast device can be regarded as normal; if they are inconsistent, it means that there is a phenomenon of current increase or decrease in the actually detected second line current and its fluctuation is abnormal, so one or more speakers among all the second speakers are faulty and the second broadcast device can be regarded as abnormal. For the second broadcast device, abnormal detection can be quickly and accurately realized directly based on the second line current.

[0111] Preferably, the second sound signal includes a third sub-signal and a plurality of fourth sub-signals, where the number of the fourth sub-signals is the same as that of the second speakers, and all the fourth sub-signals correspond to all the second speakers one by one;

[0112] Then in S2B, when the second broadcast device is abnormal, control the second speakers and the microphone to work respectively, and according to the second preset sound acquisition strategy, control the microphone to collect the second sound signal, and perform abnormal positioning on the second broadcast device based on the collected second sound signal, and output the second abnormal positioning detection result, including:

[0113] S2B3: Control the microphone in the first broadcast device to work and collect the third sub-signal; where the third sub-signal is the second ambient sound when no speaker emits sound in the environment where the microphone is located.

[0114] S2B4: Control each of the second speakers in the second broadcasting device to work and output the processed specific audio signals respectively; wherein, the specific audio signal is specifically an audio signal with a preset frequency and a preset intensity.

[0115] S2B5: Control the microphone in the first broadcasting device to collect each of the fourth sub-signals respectively; wherein, the fourth sub-signal is the sound synthesized by the processed specific audio signal output by the corresponding second speaker and the second ambient sound in the environment where the microphone is located.

[0116] S2B6: Compare each of the fourth sub-signals with the specific audio signal respectively; if the fourth sub-signal and the specific audio signal meet the second preset criterion, determine that the second abnormal positioning detection result is that the second speaker corresponding to the fourth sub-signal is abnormal.

[0117] In the abnormal positioning of the second broadcasting device, first control the microphone in the first broadcasting device to collect the second ambient sound when no speaker emits sound, which can facilitate removing the influence of the ambient sound in subsequent comparative analysis. After collecting the second ambient sound (i.e., the third sub-signal), then control each second speaker in the second broadcasting device to output the processed specific audio signal, which can ensure that each second speaker participates in the work under the same conditions, and then facilitate analyzing the faulty second speaker under the same conditions subsequently, ensuring the reliability of the abnormal positioning. Finally, control the microphone to collect each of the fourth sub-signals respectively. At this time, due to the participation of the second speaker in the work, if the second speaker does not malfunction, the subsequent comparison of the sound signals should be consistent, and if it malfunctions, the comparison situation will be inconsistent. Therefore, in this embodiment, through the collection of the second sound signal by the microphone, the abnormal positioning of the second speaker can be accurately and efficiently realized directly by using the comparison situation of the second sound signal, and the faulty second speaker can be accurately and quickly located, facilitating the relevant personnel to perform maintenance in a timely manner.

[0118] Specifically, similar to the foregoing first preset sound collection strategy, in step S2B3, the passenger compartment control host controls all the second speakers therein to be muted (i.e., no speaker emits sound), and then the controller in the first broadcasting device controls the microphone therein to collect the sound of its own environment (i.e., the first ambient sound). At this time, the collected sound (i.e., the third sub-signal) is the background sound when no speaker is working.

[0119] Specifically, before step S2B4, the method further includes:

[0120] Calibrate the specific audio signal.

[0121] Similar to the foregoing first preset sound acquisition strategy, by calibrating a specific audio signal, it is more conducive for the subsequent microphone to accurately collect the standard intensity corresponding to the fourth sub-signal at its location, avoiding inaccurate abnormal positioning caused by different installation positions and having higher reliability.

[0122] Among them, the specific audio signal in the second preset sound acquisition strategy can be the same as or different from the specific audio signal in the first preset sound acquisition strategy.

[0123] In this embodiment, the calibration of the specific audio signal adopts a conventional calibration method. For example, a reference level is determined, and based on this reference level, the amplitude of the specific audio signal is calibrated using an audio analyzer; then a standard signal source is used to output a signal with a known frequency, and based on this known-frequency signal, the frequency of the specific audio signal is calibrated using a spectrum analyzer.

[0124] Similarly, in S2B4, the processed specific audio signal is specifically the sound after performing a difference operation between the specific audio signal and the second ambient sound.

[0125] Similarly, through the processing of the above specific audio signal, it is convenient to determine whether the fourth sub-signal collected by the microphone during the actual acquisition process is consistent with the specific audio signal during subsequent actual comparative analysis, realizing the fault location of the second speaker.

[0126] Specifically, in the above S2B5, the second preset criterion is specifically:

[0127] The absolute value of the intensity difference between the fourth sub-signal and the specific audio signal exceeds a second preset threshold.

[0128] When the absolute value of the intensity difference between the fourth sub-signal and the specific audio signal exceeds the second preset threshold, it indicates that the difference between the fourth sub-signal and the specific audio signal is relatively large and the two are inconsistent. Similar to the foregoing first preset criterion, this embodiment realizes the comparison between two sound signals based on sound intensity, with high accuracy, conforming to the actual situation of the broadcast equipment in the in-vehicle PIS system and having high reliability.

[0129] The above second preset threshold can also be preset and adjusted according to the actual situation, and this embodiment does not make any restrictions.

[0130] Specifically, in an alternative embodiment, an abnormality of a second broadcast device is determined based on a second line current. The third sub-signal collected by the microphone is signal A; the calibrated specific audio signal is signal B, and the signal C output by the second speaker is the sound signal obtained by performing a difference operation on signal B and signal A, that is, C = B - A; then the fourth sub-signal D collected by the microphone should theoretically be D = B - A + A = B; in an actual comparison, if the absolute value of the intensity difference between signal D and signal B exceeds a second preset threshold, it indicates that the fourth sub-signal D collected by the microphone is inconsistent with B and does not meet the theoretical situation, that is, the speaker corresponding to this fourth sub-signal has a fault and needs to be repaired.

[0131] Specifically, in this embodiment, when performing an abnormal self-detection on the PIS broadcast system, on the one hand, the controller in the broadcast control box arranged in the driver's cab first controls the microphone and the first speaker inside it to perform detection according to step S1. When an abnormality is determined, it then controls the corresponding current detection module to perform abnormal positioning according to the above step S2A to locate the position of the abnormal first speaker or microphone; on the other hand, a broadcast system diagnosis command is sent through the broadcast control box arranged in the driver's cab. After receiving the diagnosis command, the driver's cab control host conveys the diagnosis command to each passenger compartment host. The passenger compartment host sends the diagnosis command to the passenger emergency alarm in that passenger compartment. After receiving the diagnosis command, the controller in the emergency alarm first controls the microphone and the first speaker inside it to perform detection according to step S1. When an abnormality is determined, it then controls the corresponding current detection module to perform abnormal positioning according to the above step S2A to locate the position of the abnormal first speaker or microphone; in addition, the passenger compartment host also sends the diagnosis command to the current detection modules corresponding to each second broadcast device to perform abnormal detection according to the above step S2B. When it is determined that the second broadcast device has an abnormality, it then controls all the second speakers in the second broadcast device and the microphone in the passenger alarm in the passenger compartment to perform abnormal positioning according to the above step S2B, and then sends the position of the located second speaker to the passenger compartment host and transmits it back to the driver's cab host through the passenger compartment host; realizing the abnormal self-detection and abnormal positioning of the broadcast devices in each driver's cab and each passenger compartment respectively.

[0132] Embodiment 2

[0133] As Figure 6 shown, an abnormal self-detection system for a PIS broadcast system is applied to the abnormal self-detection method of the PIS broadcast system in Embodiment 1. The PIS broadcast system includes a first broadcast device and a second broadcast device. The first broadcast device includes a microphone and a first speaker. The second broadcast device includes a plurality of second speakers, and each second speaker is within the sound collection range of the microphone; wherein, the first broadcast device and the second broadcast device are both configured with current detection modules;

[0134] The self-detection system includes:

[0135] A first anomaly detection unit, configured to separately control the first speaker and the microphone to work in the first broadcast device, and control the microphone to collect a first sound signal according to a first preset sound collection strategy, and determine whether the first broadcast device has an anomaly according to the first sound signal;

[0136] A first anomaly localization unit, configured to, when the first anomaly detection unit detects that the first broadcast device has an anomaly, use the current detection module configured for the first broadcast device to detect the first line current of the first broadcast device in real time; and perform anomaly localization on the first broadcast device according to the detected first line current, and output a first anomaly localization detection result;

[0137] A second anomaly detection unit, configured to, when the first anomaly detection unit detects that the first broadcast device is normal, use the current detection module configured for the second broadcast device to detect the second line current of the second broadcast device in real time; and determine whether the second broadcast device has an anomaly according to the detected second line current;

[0138] A second anomaly localization unit, configured to, when the second anomaly detection unit detects that the second broadcast device has an anomaly, separately control the second speaker and the microphone to work, and control the microphone to collect a second sound signal according to a second preset sound collection strategy, and perform anomaly localization on the second broadcast device according to the collected second sound signal, and output a second anomaly localization detection result.

[0139] In this embodiment, the broadcast devices in the PIS broadcast system include two types. The first type is the first broadcast device that has both a microphone function and a speaker function, and the second type is the second broadcast device that only has a speaker function. For the first broadcast device, the first abnormal detection unit directly collects the first sound signal according to the first preset sound collection strategy through its own microphone to realize its own abnormal self-detection. When it is abnormal itself, since it may be that the microphone is abnormal or the first speaker is abnormal, the first abnormal positioning unit is used, and combined with the first line current detected by the configured current detection module, the abnormal positioning is realized and the corresponding first abnormal positioning detection result is output. It can realize both abnormal detection and abnormal positioning only through its own device structure. For the second broadcast device, since it only includes the second speaker, first, the second abnormal detection unit determines whether the external line loop of the entire second broadcast device is abnormal through the second line current detected by the configured current detection module, and then determines whether there is a fault in the second speaker in the second broadcast device, so as to realize the abnormal detection of this type of broadcast device. When the external line loop of the second broadcast device is abnormal, that is, when the second speaker fails, since the second speaker is within the sound collection range of the microphone in the first broadcast device, at this time, the second abnormal positioning unit is used to collect the second sound signal respectively according to the second preset sound collection strategy by the microphone in the first broadcast device, and based on the analysis of the second sound signal collected by the microphone, the abnormal positioning of the second broadcast device can also be realized. Similarly, only by using the device structure of the PIS broadcast system itself, both abnormal detection and abnormal positioning are realized.

[0140] The abnormal self-detection system of the PIS broadcast system in this embodiment can respectively realize the abnormal self-detection and abnormal positioning of the two types of broadcast devices based on the device structure of the broadcast devices in the PIS broadcast system, accurately locate the faulty microphone or speaker when an abnormality occurs, and thus can effectively improve the reliability of the abnormal detection of the PIS broadcast system, which is helpful for subsequent maintenance.

[0141] The functions of the units in the abnormal self-detection system of the PIS broadcast system described in this embodiment correspond to the steps of the abnormal self-detection method of the PIS broadcast system in Embodiment 1. For the details not described in this embodiment, please refer to Embodiment 1 and Figures 1 to 5 the specific description, which will not be elaborated here.

[0142] Embodiment 3

[0143] As Figure 7As shown, an abnormal self-detection device for a PIS broadcast system. The PIS broadcast system includes a first broadcast device and a second broadcast device. The first broadcast device includes a microphone and a first speaker, and the second broadcast device includes a plurality of second speakers, and each of the second speakers is within the sound collection range of the microphone;

[0144] The abnormal self-detection device includes:

[0145] At least two current detection modules respectively corresponding to the first broadcast device and the second broadcast device; the current detection module corresponding to the first broadcast device is used to detect the first line current in the first broadcast device corresponding to it in real time, and the current detection module corresponding to the second broadcast device is used to detect the second line current in the second broadcast device corresponding to it in real time;

[0146] The abnormal self-detection system of the PIS broadcast system in Embodiment 2 is communicatively connected to the microphone, the first speaker, all the second speakers and all the current detection modules;

[0147] The abnormal self-detection system of the PIS broadcast system is used for:

[0148] In the first broadcast device, control the first speaker and the microphone to work respectively, and according to the first preset sound collection strategy, control the microphone to collect the first sound signal, and judge whether the first broadcast device is abnormal according to the first sound signal;

[0149] When the first broadcast device is abnormal, receive the first line current detected by the current detection module corresponding to the first broadcast device; and according to the first line current, perform abnormal positioning on the first broadcast device and output the first abnormal positioning detection result;

[0150] When the first broadcast device is normal, receive the second line current detected by the current detection module corresponding to the second broadcast device; and judge whether the second broadcast device is abnormal according to the second line current; when the second broadcast device is abnormal, control the second speaker and the microphone to work respectively, and according to the second preset sound collection strategy, control the microphone to collect the second sound signal, and perform abnormal positioning on the second broadcast device according to the collected second sound signal and output the second abnormal positioning detection result.

[0151] In this embodiment, based on the abnormal self-detection system of the PIS broadcast system in Embodiment 2, the communication interactions with the microphone, the first speaker, all the second speakers, and all the current detection modules can respectively implement the abnormal self-detection and abnormal positioning of two types of broadcast devices based on the device structure of the broadcast devices in the PIS broadcast system. When an abnormality occurs, the faulty microphone or speaker can be accurately located, thereby effectively improving the reliability of the abnormal detection of the PIS broadcast system and facilitating subsequent maintenance.

[0152] The structure of the abnormal self-detection system of the PIS broadcast system in this embodiment is the same as that of the abnormal self-detection system of the PIS broadcast system in Embodiment 2. Therefore, for the details not described in this embodiment, refer to the specific descriptions in Embodiment 1, Embodiment 2 and Figures 1 to 6 are not elaborated here.

[0153] Embodiment 4

[0154] This embodiment provides another abnormal self-detection device for a PIS broadcast system, including a processor, a memory, and a computer program stored in the memory and executable on the processor. When the computer program runs, it implements the method steps in the abnormal self-detection method of the PIS broadcast system in Embodiment 1.

[0155] Through the computer program stored in the memory and running on the processor, the abnormal self-detection and abnormal positioning of two types of broadcast devices can be respectively implemented based on the device structure of the broadcast devices in the PIS broadcast system. When an abnormality occurs, the faulty microphone or speaker can be accurately located, thereby effectively improving the reliability of the abnormal detection of the PIS broadcast system and facilitating subsequent maintenance.

[0156] The so-called processor may be a central processing unit (CPU), or may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The processor is the control center of the computer device, connecting various parts of the entire computer device through various interfaces and lines.

[0157] The memory can be used to store computer programs and / or models. By running or executing the computer programs and / or models stored in the memory and invoking the data stored in the memory, the processor realizes various functions of the computer device. The memory mainly includes a program storage area and a data storage area. Among them, the program storage area can store an operating system and application programs required for at least one function (such as a sound playback function, an image playback function, etc.); the data storage area can store data created according to the use of the mobile phone (such as audio data, video data, etc.). In addition, the memory can include high-speed random access memory and can also include non-volatile memory, such as a hard disk, memory, plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, at least one magnetic disk storage device, flash device, or other volatile solid-state storage devices.

[0158] It should be understood that each process and / or block in the flowchart and / or block diagram can be implemented by a computer program, as well as the combination of processes and / or blocks in the flowchart and / or block diagram. These computer programs can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for realizing the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0159] These computer programs can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device, and the instruction device realizes the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0160] These computer programs can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process. Thus, the instructions executed on the computer or other programmable device provide steps for realizing the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0161] This embodiment also provides a computer storage medium, which includes: at least one instruction, and when the instruction is executed, it realizes the method steps in the abnormal self-detection method of the PIS broadcast system in Embodiment 1.

[0162] By executing a computer storage medium containing at least one instruction, it is possible to respectively implement the abnormal self-detection and abnormal location of two types of broadcast devices based on the device structure of the broadcast device itself in the PIS broadcast system. When an abnormality occurs, the faulty microphone or speaker can be accurately located, thereby effectively improving the reliability of the abnormal detection of the PIS broadcast system and facilitating subsequent maintenance.

[0163] Similarly, for the details not described in Embodiment 4, refer to the specific descriptions of Embodiment 1, Embodiment 2, Embodiment 3 and Figures 1 to 7 will not be elaborated here.

[0164] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An abnormal self-detection method for a PIS broadcast system, characterized in that, The PIS broadcast system includes a first broadcast device and a second broadcast device. The first broadcast device includes a microphone and a first speaker. The second broadcast device includes a plurality of second speakers connected in parallel, and each of the second speakers is within the sound collection range of the microphone. Among them, both the first broadcast device and the second broadcast device are configured with current detection modules; The method includes: In the first broadcast device, control the first speaker and the microphone to work respectively, and according to a first preset sound collection strategy, control the microphone to collect a first sound signal, and judge whether the first broadcast device is abnormal according to the first sound signal; When the first broadcast device is abnormal, use the current detection module configured corresponding to the first broadcast device to detect the first line current of the first broadcast device in real time; and according to the detected first line current, perform abnormal positioning on the first broadcast device, and output a first abnormal positioning detection result to determine whether the faulty part is the first speaker or the microphone; When the first broadcast device is normal, use the current detection module configured corresponding to the second broadcast device to detect the second line current of the second broadcast device in real time; perform overall detection on the second speakers connected in parallel through the second line current, and judge whether the second broadcast device is abnormal according to the result of the overall detection; when the second broadcast device is abnormal, control each second speaker to work alone in cooperation with the microphone respectively, and according to a second preset sound collection strategy, control the microphone to collect a second sound signal, and perform abnormal positioning on the second broadcast device according to the collected second sound signal, and output a second abnormal positioning detection result to determine which one or which of the second speakers is faulty.

2. The method according to claim 1, wherein The first sound signal includes a first sub-signal and a second sub-signal; In the first broadcast device, control the first speaker and the microphone to work respectively, and according to a first preset sound collection strategy, control the microphone to collect a first sound signal, and judge whether the first broadcast device is abnormal according to the first sound signal, including: In the first broadcast device, control the microphone to work and collect the first sub-signal; wherein, the first sub-signal is the first ambient sound when no speaker emits sound in the environment where the microphone is located; Control the first speaker to work and output a processed specific audio signal; wherein, the specific audio signal is specifically an audio signal with a preset frequency and a preset intensity; Control the microphone to work and collect the second sub-signal; wherein, the second sub-signal is the sound synthesized by the processed specific audio signal output by the first speaker and the first ambient sound in the environment where the microphone is located; Compare the second sub-signal with the specific audio signal; if the second sub-signal and the specific audio signal meet a first preset criterion, it is determined that the first broadcast device is abnormal; otherwise, it is determined that the first broadcast device is normal.

3. The method according to claim 2, characterized in that The processed specific audio signal is specifically the sound after performing a difference operation on the specific audio signal and the first environmental sound.

4. The method according to claim 3, characterized in that, The first preset criterion is specifically: The absolute value of the intensity difference between the second sub-signal and the specific audio signal exceeds a first preset threshold.

5. The method according to claim 3, wherein Before controlling the first speaker to work and output the processed specific audio signal, the method further includes: Calibrating the specific audio signal.

6. The method according to claim 1, characterized in that, The first broadcast device has a first preset loop current value during normal operation; the first abnormal positioning detection result includes that the first speaker in the first broadcast device fails and the microphone in the first broadcast device fails; According to the detected first line current, perform abnormal positioning on the first broadcast device and output a first abnormal positioning detection result, including: Compare the detected first line current with the first preset loop current value; If the comparison is inconsistent, determine that the first abnormal positioning detection result is that the first speaker in the first broadcast device fails; otherwise, determine that the first abnormal positioning detection result is that the microphone in the first broadcast device fails.

7. The method according to claim 1, wherein The second broadcast device has a second preset loop current value during normal operation; Overall detect the second speakers connected in parallel through the second line current, and determine whether the second broadcast device is abnormal according to the result of the overall detection, including: Compare the detected second line current with the second preset loop current value; If the comparison is inconsistent, determine that the second broadcast device is abnormal; otherwise, determine that the second broadcast device is normal.

8. The method according to claim 1, wherein The second sound signal includes a third sub-signal and multiple fourth sub-signals, where the number of the fourth sub-signals is the same as the number of the second speakers, and all the fourth sub-signals correspond to all the second speakers one by one; When the second broadcast device is abnormal, control the second speaker and the microphone to work respectively, and according to a second preset sound collection strategy, control the microphone to collect a second sound signal, and perform abnormal positioning on the second broadcast device according to the collected second sound signal, and output a second abnormal positioning detection result, including: Control the microphone in the first broadcast device to work and collect the third sub-signal; where the third sub-signal is the second environmental sound when no speaker emits sound in the environment where the microphone is located; Control each second speaker in the second broadcast device to work and output the processed specific audio signal respectively; where the specific audio signal is specifically an audio signal with a preset frequency and a preset intensity; Control the microphone in the first broadcast device to work and collect each fourth sub-signal respectively; where the fourth sub-signal is the sound after synthesizing the processed specific audio signal output by the corresponding second speaker and the second environmental sound in the environment where the microphone is located; Compare each of the fourth sub-signals with the specific audio signal respectively; if the fourth sub-signal and the specific audio signal meet the second preset criterion, determine that the second abnormal positioning detection result is that the second speaker corresponding to the fourth sub-signal is abnormal.

9. The method according to claim 8, wherein Before controlling the microphone in the first broadcast device to work and collecting the third sub-signal, the method further includes: Calibrate the specific audio signal.

10. The method according to claim 8, wherein The processed specific audio signal is specifically the sound obtained by performing a difference operation on the specific audio signal and the second ambient sound.

11. The method according to claim 8, wherein The second preset criterion is specifically: The absolute value of the intensity difference between the fourth sub-signal and the specific audio signal exceeds a second preset threshold.

12. An abnormal self-detection system for a PIS broadcast system, characterized in that, Applied to the abnormal self-detection method of the PIS broadcast system according to any one of claims 1 to 11, the PIS broadcast system includes a first broadcast device and a second broadcast device. The first broadcast device includes a microphone and a first speaker. The second broadcast device includes a plurality of second speakers arranged in parallel. Each of the second speakers is within the sound collection range of the microphone; wherein, both the first broadcast device and the second broadcast device are configured with current detection modules; Includes: A first abnormal detection unit, configured to, in the first broadcast device, separately control the first speaker and the microphone to work, and according to a first preset sound collection strategy, control the microphone to collect a first sound signal, and determine whether the first broadcast device is abnormal according to the first sound signal; A first abnormal positioning unit, configured to, when the first abnormal detection unit detects that the first broadcast device is abnormal, use the current detection module corresponding to the first broadcast device to detect the first line current of the first broadcast device in real time; and according to the detected first line current, perform abnormal positioning on the first broadcast device, and output a first abnormal positioning detection result to determine whether the faulty component is the first speaker or the microphone; A second abnormal detection unit, configured to, when the first abnormal detection unit detects that the first broadcast device is normal, use the current detection module corresponding to the second broadcast device to detect the second line current of the second broadcast device in real time; perform an overall detection on the second speakers connected in parallel through the second line current, and determine whether the second broadcast device is abnormal according to the result of the overall detection; A second abnormal positioning unit, configured to, when the second abnormal detection unit detects that the second broadcast device is abnormal, separately control each second speaker to work in cooperation with the microphone, and according to a second preset sound collection strategy, control the microphone to collect a second sound signal, and perform abnormal positioning on the second broadcast device according to the collected second sound signal, and output a second abnormal positioning detection result to determine which or which of the second speakers is faulty.

13. An abnormal self-detection device for a PIS broadcast system, characterized in that, The PIS broadcast system includes a first broadcast device and a second broadcast device. The first broadcast device includes a microphone and a first speaker. The second broadcast device includes a plurality of second speakers arranged in parallel, and each of the second speakers is within the sound collection range of the microphone; Comprising: At least two current detection modules respectively corresponding to the first broadcast device and the second broadcast device; the current detection module corresponding to the first broadcast device is used to detect the first line current in the first broadcast device corresponding to it in real time, and the current detection module corresponding to the second broadcast device is used to detect the second line current in the second broadcast device corresponding to it in real time; The abnormal self-detection system of the PIS broadcast system according to claim 12, which is communicatively connected to the microphone, the first speaker, all the second speakers and all the current detection modules; The abnormal self-detection system of the PIS broadcast system is used for: In the first broadcast device, control the first speaker and the microphone to work respectively, and according to the first preset sound collection strategy, control the microphone to collect the first sound signal, and judge whether the first broadcast device is abnormal according to the first sound signal; When the first broadcast device is abnormal, receive the first line current detected by the current detection module corresponding to the first broadcast device; and according to the first line current, perform abnormal positioning on the first broadcast device, and output the first abnormal positioning detection result to determine whether the faulty component is the first speaker or the microphone; When the first broadcast device is normal, receive the second line current detected by the current detection module corresponding to the second broadcast device; perform overall detection on the second speakers connected in parallel through the second line current, and judge whether the second broadcast device is abnormal according to the result of the overall detection; when the second broadcast device is abnormal, control each second speaker to work alone in cooperation with the microphone respectively, and according to the second preset sound collection strategy, control the microphone to collect the second sound signal, and perform abnormal positioning on the second broadcast device according to the collected second sound signal, and output the second abnormal positioning detection result to determine which one or which of the second speakers is faulty.

14. A computer storage medium, characterized in that, The computer storage medium includes: at least one instruction, which implements the method steps according to any one of claims 1 to 11 when the instruction is executed by a computer.

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