Abnormality self-detection method, system and device of PIS broadcast system and medium

Abstract

The invention discloses an abnormity self-detection method, system and device for a PIS broadcasting system and a medium, and the method comprises the steps: controlling a first loudspeaker and a microphone to work, controlling the microphone to collect a first sound signal according to a first preset sound collection strategy, and judging whether first broadcasting equipment is abnormal or not according to the first sound signal; when the first broadcast equipment is abnormal, abnormal positioning is carried out according to the detected first line current of the first broadcast equipment; when the first broadcasting equipment is normal, judging whether the second broadcasting equipment is abnormal or not according to the detected second line current; and when abnormity occurs, respectively controlling the second loudspeaker and the microphone to work, controlling the microphone to acquire a second sound signal according to a second preset sound acquisition strategy, and performing abnormity positioning on the second broadcast equipment according to the second sound signal. According to the invention, abnormity self-detection and abnormity positioning of two kinds of broadcast equipment can be realized respectively, the reliability is high, and subsequent maintenance is facilitated.

Description

Technical Field

[0001] The present invention relates to the field of rail transit technology, and in particular to an abnormality self-detection method, system, device and medium for a PIS broadcasting system. Background Art

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

[0003] In the on-board PIS system, the broadcasting system mainly includes the broadcasting control box in the driver's cab and the passenger emergency alarm in the passenger compartment. These devices are equipped with microphones and speakers. The broadcasting system also includes a separate speaker in the passenger compartment, etc. These devices play a vital role. During the passengers' ride, the broadcasting system is used to realize voice communication between the driver and passengers, and to convey train operation information (including arrival time, departure time, etc.) and various notification 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 passengers.

[0004] In the actual application of the vehicle-mounted PIS system, the abnormal self-detection of the broadcasting system has the advantages of ensuring operational safety, improving service quality, reducing maintenance costs, and improving management efficiency. The abnormal detection of the existing broadcasting system usually determines whether the function of the broadcasting system is abnormal by the presence or absence of sound in the microphone and speaker. However, when the broadcasting system is abnormal, it is impossible to locate the specific speaker or microphone that has failed, which is not conducive to subsequent maintenance. Therefore, the reliability of the existing PIS broadcasting system abnormality detection technology is low. Summary of the invention

[0005] In view of this, the present invention provides a method, system, device and medium for self-detection of abnormalities in a PIS broadcasting system to solve the problem that the reliability of the abnormality detection technology of the existing PIS broadcasting system is low and thus unfavorable for maintenance.

[0006] The present invention provides an abnormality self-detection method for a PIS broadcasting system, wherein the PIS broadcasting system comprises a first broadcasting device and a second broadcasting device, wherein the first broadcasting device comprises a microphone and a first speaker, and the second broadcasting device comprises a plurality of second speakers, and each of the second speakers is located within the sound collection range of the microphone; wherein the first broadcasting device and the second broadcasting device are both configured with a current detection module; The method comprises: In the first broadcasting device, the first speaker and the microphone are controlled to work respectively, and according to a first preset sound collection strategy, the microphone is controlled to collect a first sound signal, and whether the first broadcasting device is abnormal is determined according to the first sound signal; When the first broadcasting device is abnormal, the current detection module configured corresponding to the first broadcasting device is used to detect the first line current of the first broadcasting device in real time; and the first broadcasting device is abnormally located according to the detected first line current, and a first abnormal location detection result is output; When the first broadcasting device is normal, the current detection module corresponding to the second broadcasting device is used to detect the second line current of the second broadcasting device in real time; and based on the detected second line current, it is determined whether the second broadcasting device is abnormal; when the second broadcasting device is abnormal, the second speaker and the microphone are controlled to work respectively, and according to the second preset sound collection strategy, the microphone is controlled to collect the second sound signal, the second broadcasting device is abnormally located according to the collected second sound signal, and a second abnormal location detection result is output.

[0007] Optionally, the first sound signal includes a first sub-signal and a second sub-signal; In the first broadcasting device, controlling the first speaker and the microphone to work respectively, and controlling the microphone to collect a first sound signal according to a first preset sound collection strategy, and judging whether the first broadcasting device is abnormal according to the first sound signal, includes: In the first broadcasting device, the microphone is controlled to work and the first sub-signal is collected; wherein the first sub-signal is a first environmental sound in an environment where the microphone is located and no loudspeaker emits sound; Controlling 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; Controlling the microphone to work and collect the second sub-signal; wherein the second sub-signal is a sound synthesized from the processed specific audio signal output by the first speaker and the first environmental sound in the environment where the microphone is located; The second sub-signal is compared 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 broadcasting device is abnormal; otherwise, it is determined that the first broadcasting device is normal.

[0008] Optionally, the processed specific audio signal is specifically a sound obtained by performing a difference operation between the specific audio signal and the first ambient sound.

[0009] Optionally, the first preset criterion is specifically: An absolute value of a strength difference between the second sub-signal and the specific audio signal exceeds a first preset threshold.

[0010] Optionally, before controlling the first speaker to work and outputting the processed specific audio signal, the method further includes: The specific audio signal is calibrated.

[0011] Optionally, the first broadcasting device has a first preset loop current value when normal; the first abnormal location detection result includes that the first speaker in the first broadcasting device is faulty and the microphone in the first broadcasting device is faulty; The method includes performing abnormal location detection on the first broadcasting device according to the detected first line current and outputting a first abnormal location detection result, including: comparing the detected first line current with the first preset loop current value; If the comparison is inconsistent, it is determined that the first abnormal positioning detection result is that the first speaker in the first broadcasting device is faulty; otherwise, it is determined that the first abnormal positioning detection result is that the microphone in the first broadcasting device is faulty.

[0012] Optionally, the second broadcasting device has a second preset loop current value when normal; Judging whether the second broadcasting device is abnormal according to the detected second line current includes: comparing the detected second line current with the second preset loop current value; If the comparison is inconsistent, it is determined that the second broadcasting device is abnormal; otherwise, it is determined that the second broadcasting device is normal.

[0013] Optionally, the second sound signal includes a third sub-signal and a plurality of fourth sub-signals, wherein 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 in a one-to-one manner; When the second broadcasting device is abnormal, the second speaker and the microphone are controlled to work respectively, and the microphone is controlled to collect a second sound signal according to a second preset sound collection strategy, the second broadcasting device is abnormally located according to the collected second sound signal, and a second abnormal location detection result is output, including: Controlling the microphone in the first broadcasting device to work and collect the third sub-signal; wherein the third sub-signal is a second environmental sound when no loudspeaker emits sound in the environment where the microphone is located; Controlling each of the second speakers in the second broadcasting device to work and output the processed specific audio signals respectively; wherein the specific audio signals are specifically audio signals with a preset frequency and a preset intensity; Controlling the microphone in the first broadcasting device to work and collect each of the fourth sub-signals respectively; wherein the fourth sub-signal is a sound synthesized from the processed specific audio signal output by the corresponding second speaker and the second environmental sound in the environment where the microphone is located; Each of the fourth sub-signals is compared with the specific audio signal respectively; if the fourth sub-signal and the specific audio signal satisfy a second preset criterion, it is determined that the second abnormality location detection result is that the second speaker corresponding to the fourth sub-signal has an abnormality.

[0014] Optionally, before controlling the microphone in the first broadcasting device to operate and collecting the third sub-signal, the method further includes: The specific audio signal is calibrated.

[0015] Optionally, the processed specific audio signal is specifically a sound obtained by performing a difference operation between the specific audio signal and the second ambient sound.

[0016] Optionally, the second preset criterion is specifically: An absolute value of a strength difference between the fourth sub-signal and the specific audio signal exceeds a second preset threshold.

[0017] In addition, the present invention also provides an abnormality self-detection system of a PIS broadcasting system, which is applied to the abnormality self-detection method of the PIS broadcasting system mentioned above, wherein the PIS broadcasting system includes a first broadcasting device and a second broadcasting device, wherein the first broadcasting device includes a microphone and a first speaker, and the second broadcasting device includes a plurality of second speakers, and each of the second speakers is located within the sound collection range of the microphone; wherein the first broadcasting device and the second broadcasting device are both configured with a current detection module; include: a first abnormality detection unit, configured to control the first speaker and the microphone to work respectively in the first broadcasting device, and control the microphone to collect a first sound signal according to a first preset sound collection strategy, and determine whether the first broadcasting device has an abnormality according to the first sound signal; A first abnormality locating unit is configured to detect a first line current of the first broadcasting device in real time by using the current detection module configured corresponding to the first broadcasting device when the first abnormality detection unit detects that the first broadcasting device is abnormal; and locate the abnormality of the first broadcasting device according to the detected first line current, and output a first abnormality locating detection result; a second abnormality detection unit, configured to detect the second line current of the second broadcasting device in real time by using the current detection module configured corresponding to the second broadcasting device when the first abnormality detection unit detects that the first broadcasting device is normal; and determine whether the second broadcasting device is abnormal according to the detected second line current; The second abnormality locating unit is used to control the second speaker and the microphone to work respectively when the second abnormality detection unit detects that the second broadcasting device has an abnormality, and control the microphone to collect a second sound signal according to a second preset sound collection strategy, and locate the abnormality of the second broadcasting device according to the collected second sound signal, and output a second abnormality locating detection result.

[0018] In addition, the present invention also provides an abnormality self-detection device of a PIS broadcasting system, the PIS broadcasting system includes a first broadcasting device and a second broadcasting device, the first broadcasting device includes a microphone and a first speaker, the second broadcasting device includes a plurality of second speakers, each of the second speakers is located within the sound collection range of the microphone; include: At least two current detection modules are respectively arranged corresponding to the first broadcasting device and the second broadcasting device; the current detection module arranged corresponding to the first broadcasting device is used to detect the first line current in the corresponding first broadcasting device in real time, and the current detection module arranged corresponding to the second broadcasting device is used to detect the second line current in the corresponding second broadcasting device in real time; The aforementioned abnormality self-detection system of the PIS broadcasting system is communicatively connected with the microphone, the first speaker, all the second speakers and all the current detection modules; The abnormal self-detection system of the PIS broadcasting system is used to: In the first broadcasting device, the first speaker and the microphone are controlled to work respectively, and according to a first preset sound collection strategy, the microphone is controlled to collect a first sound signal, and whether the first broadcasting device is abnormal is determined according to the first sound signal; When the first broadcasting device is abnormal, the first line current detected by the current detection module configured corresponding to the first broadcasting device is received; and the first broadcasting device is abnormally located according to the first line current, and a first abnormal location detection result is output; When the first broadcasting device is normal, the second line current detected by the current detection module corresponding to the configuration of the second broadcasting device is received; and according to the second line current, whether the second broadcasting device is abnormal is determined; when the second broadcasting device is abnormal, the second speaker and the microphone are controlled to work respectively, and according to the second preset sound collection strategy, the microphone is controlled to collect the second sound signal, the second broadcasting device is abnormally located according to the collected second sound signal, and a second abnormal location detection result is output.

[0019] In addition, the present invention also provides a computer storage medium, which includes: at least one instruction, which implements the method steps in the aforementioned abnormality self-detection method of the PIS broadcasting system when the instruction is executed.

[0020] Beneficial effects of the present invention: There are two types of broadcasting equipment in the PIS broadcasting system. The first type is a first broadcasting equipment with both microphone and speaker functions, and the second type is a second broadcasting equipment with only speaker function. For the first type of broadcasting equipment, the first sound signal is directly collected by its own microphone according to the first preset sound collection strategy to realize its own abnormal self-detection. When it is abnormal, since it may be the microphone or the first speaker that is abnormal, the first line current detected by the configured current detection module is combined to realize abnormal location and output the corresponding first abnormal location detection result, which can realize both abnormal detection and abnormal location only through its own device structure. As for the second type of broadcasting equipment, since it only includes the second speaker, first The second line current detected by the configured current detection module determines whether the external line loop of the entire second broadcasting device is abnormal, and then determines whether the second speaker in the second broadcasting device is faulty, so as to realize abnormal detection of this type of broadcasting device; when the external line loop of the second broadcasting device is abnormal, that is, when the second speaker is faulty, since the second speaker is located within the sound collection range of the microphone in the first broadcasting device, the microphone in the first broadcasting device is used to collect the second sound signals respectively according to the second preset sound collection strategy, and the second sound signals collected by the microphone are analyzed, so as to realize abnormal location of the second broadcasting device. Similarly, only the device structure of the PIS broadcasting system itself is used to realize both abnormal detection and abnormal location; The abnormality self-detection method, system, device and medium of the PIS broadcasting system of the present invention can respectively realize abnormality self-detection and abnormality positioning of two types of broadcasting equipment based on the equipment structure of the broadcasting equipment itself in the PIS broadcasting system, and accurately locate the faulty microphone or speaker when an abnormality occurs, thereby effectively improving the reliability of abnormality detection of the PIS broadcasting system and facilitating subsequent maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The features and advantages of the present invention will be more clearly understood by referring to the accompanying drawings, which are schematic and should not be construed as limiting the present invention in any way. In the accompanying drawings: Figure 1 A flow chart of an abnormality self-detection method of a PIS broadcasting system in Embodiment 1 of the present invention is shown; Figure 2 The structure block diagram of the vehicle-mounted PIS system in the first embodiment of the present invention is shown; Figure 3 The layout structure diagram of the broadcasting equipment in the driver's cab and the passenger compartment in the first embodiment of the present invention is shown; Figure 4 The internal structure diagram of the broadcasting device in the first embodiment of the present invention is shown; Figure 5 A schematic diagram showing the layout of a current detection module in a broadcast device in Embodiment 1 of the present invention is shown; Figure 6 A structural diagram of an abnormality self-detection system of a PIS broadcasting system in Embodiment 2 of the present invention is shown; Figure 7 A structural diagram of an abnormality self-detection device of a PIS broadcasting system in Embodiment 3 of the present invention is shown. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0023] Embodiment 1

[0024] A method for self-detecting abnormalities in a PIS broadcasting system, the PIS broadcasting system comprising a first broadcasting device and a second broadcasting device, the first broadcasting device comprising a microphone and a first speaker, the second broadcasting device comprising a plurality of second speakers, each of the second speakers being located within a sound collection range of the microphone; wherein the first broadcasting device and the second broadcasting device are both equipped with a current detection module; like Figure 1 As shown, the method includes: S1: In the first broadcasting device, the first speaker and the microphone are controlled to work respectively, and according to a first preset sound collection strategy, the microphone is controlled to collect a first sound signal, and whether the first broadcasting device is abnormal is determined according to the first sound signal; S2A: When the first broadcasting device is abnormal, the current detection module configured corresponding to the first broadcasting device is used to detect the first line current of the first broadcasting device in real time; and the first broadcasting device is abnormally located according to the detected first line current, and a first abnormality location detection result is output; S2B: When the first broadcasting device is normal, the current detection module corresponding to the second broadcasting device is used to detect the second line current of the second broadcasting device in real time; and based on the detected second line current, it is determined whether the second broadcasting device is abnormal; when the second broadcasting device is abnormal, the second speaker and the microphone are controlled to work respectively, and according to the second preset sound collection strategy, the microphone is controlled to collect the second sound signal, the second broadcasting device is abnormally located according to the collected second sound signal, and a second abnormal location detection result is output.

[0025] In this embodiment, the PIS broadcasting system includes two types of broadcasting equipment. The first type is a first broadcasting equipment with both microphone and speaker functions. The first broadcasting equipment includes a broadcasting control box located in each driver's cab of a rail transit vehicle (such as a bus, subway, train, high-speed rail, etc.) and a passenger emergency alarm in each passenger compartment. The broadcasting control box in the driver's cab is divided into a main broadcasting control box and an auxiliary broadcasting control box (since the main broadcasting control box is the control box that performs the main function, the broadcasting control box in this embodiment mainly refers to the main broadcasting control box). The main broadcasting control box and the passenger emergency alarm in the passenger compartment are both equipped with a microphone and a first speaker, such as Figure 2 As shown (where Figure 2 Only the connection between one of the passenger compartments and the driver's compartment is shown. The structures of the other passenger compartments are similar, and the adjacent passenger compartments and the last passenger compartment and the driver's compartment communicate with each other through switches. In addition, Figure 2 The microphone and the first speaker 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. Figure 3 As shown (where, for ease of presentation, Figure 3The second type is a second broadcasting device having only a speaker function, the second broadcasting device including a second speaker located in each passenger compartment of the rail vehicle, such as Figure 2 shown.

[0026] For the first type of broadcasting equipment, the first sound signal is directly collected by its own microphone according to the first preset sound collection strategy to realize its own abnormal self-detection; when it is abnormal, since it may be the microphone or the first speaker that is abnormal, the first line current detected by the configured current detection module is combined to realize abnormal location and output the corresponding first abnormal location detection result, and both abnormal detection and abnormal location can be realized only through its own equipment structure; and for the second type of broadcasting equipment, since it only includes the second speaker, firstly, the second line current detected by the configured current detection module is used to determine whether the external line loop of the entire second broadcasting equipment is abnormal, and then it is determined whether the second speaker in the second broadcasting equipment has a fault, so as to realize the abnormal detection of this type of broadcasting equipment; when the external line loop of the second broadcasting equipment is abnormal, that is, when the second speaker has a fault, since the second speaker is located within the sound collection range of the microphone in the first broadcasting equipment, the microphone in the first broadcasting equipment is used to collect the second sound signal respectively according to the second preset sound collection strategy, and the second sound signal collected by the microphone is analyzed, so as to realize the abnormal location of the second broadcasting equipment, and similarly, only the equipment structure of the PIS broadcasting system is used to realize both abnormal detection and abnormal location.

[0027] The abnormality self-detection method of the PIS broadcasting system of this embodiment can realize abnormality self-detection and abnormality positioning of two types of broadcasting equipment based on the equipment structure of the broadcasting equipment itself in the PIS broadcasting system, and accurately locate the faulty microphone or speaker when an abnormality occurs, thereby effectively improving the reliability of abnormality detection of the PIS broadcasting system and facilitating subsequent maintenance.

[0028] In this embodiment, the internal structure of the first broadcasting device (i.e., the broadcasting control box and the passenger emergency alarm) is as follows: Figure 4 As shown, the functions of collecting sound and emitting sound corresponding to the broadcast control box and the passenger emergency alarm can be realized (that is, the speaker function and the microphone function are realized respectively). This type of broadcasting equipment also has a built-in controller. Figure 4 In the embodiment, the first broadcasting device can control the microphone and the first speaker respectively 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; and when the controller controls the first speaker to emit sound, it is mainly achieved by controlling the power amplifier module.

[0029] There can be multiple first broadcasting devices, such as Figure 2 There are two driver's cabs, each with a corresponding broadcast control box. Figure 2 There are also several guest rooms ( Figure 2 Only one passenger compartment is shown), and there are 4 passenger alarms in the passenger compartment. Each of the multiple first broadcasting devices can perform its own abnormality detection and abnormality positioning according to the method described in steps S1 to S2A of this embodiment through its own microphone and first speaker and correspondingly configured current detection module.

[0030] The second broadcasting device also usually includes multiple groups, such as Figure 2 In the embodiment, the passenger compartment includes two groups of second speakers, and each group of second speakers includes four second speakers connected in parallel. Both groups of second speakers are located within the sound collection range of the microphone in at least one passenger emergency alarm, and further, each second speaker is located within the sound collection range of the microphone in at least one passenger emergency alarm. Each second broadcasting device can perform abnormality detection and abnormality location through the microphone configured in the corresponding first passenger emergency alarm and the corresponding current detection module.

[0031] Each step of the abnormality self-detection method of the PIS broadcasting system of this embodiment is further described below.

[0032] In the present embodiment S1, the first sound signal includes a first sub-signal and a second sub-signal.

[0033] Then S1 includes: S11: In the first broadcasting device, control the microphone to work and collect the first sub-signal; wherein the first sub-signal is a first environmental sound in an environment where the microphone is located and no loudspeaker emits sound; 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; S13: Control the microphone to work and collect the second sub-signal; wherein the second sub-signal is a sound synthesized from the processed specific audio signal output by the first speaker and the first environmental sound in the environment where the microphone is located; S14: Compare the second sub-signal with the specific audio signal; if the second sub-signal and the specific audio signal satisfy a first preset criterion, determine that the first broadcasting device is abnormal; otherwise, determine that the first broadcasting device is normal.

[0034] In the abnormality detection process of the first broadcasting device, the microphone is first controlled to collect the first environmental sound when no speaker makes any sound, which can facilitate the removal of the influence of the environmental sound during the subsequent comparative analysis. After the first environmental sound (i.e., the first sub-signal) is collected, the first speaker is controlled to output the processed specific audio signal, which can facilitate the subsequent collection of the second sub-signal synthesized by the signal and the first environmental sound, and compare it with the specific audio signal, so as to analyze whether there is an abnormality in the first broadcasting device. Finally, the microphone is controlled to collect the second sub-signal. At this time, if neither the microphone nor the first speaker fails, the subsequent comparison of the sound signals should be consistent. If one of the microphone and the first speaker fails, the comparison will be inconsistent. Therefore, this embodiment can directly use the comparison of the first sound signal to accurately and efficiently realize the abnormality detection of the first broadcasting device through the collection of the first sound signal by the microphone.

[0035] Specifically, in S11 to S14, the controller configured in the first broadcasting device can be used to respectively realize the operation of the microphone and the first speaker. In S11, the first speaker is muted by the controller (so that no speaker emits sound in the environment where the microphone is located).

[0036] Specifically, in S12, the processed specific audio signal is a sound obtained by performing a difference operation between the specific audio signal and the first ambient sound.

[0037] By performing a difference operation on the specific audio signal and the first ambient sound, it can be ensured that, in theory, the sound obtained by synthesizing the signal output by the first speaker and the ambient sound is exactly the specific audio signal. This makes it easier to determine whether the second sub-signal collected by the microphone during the actual collection process is consistent with the specific audio signal during the subsequent actual comparative analysis, thereby realizing abnormal detection of the first broadcasting device.

[0038] Specifically, before S12, the method further includes: The specific audio signal is calibrated.

[0039] Since the installation location of each broadcasting device is different in the entire PIS broadcasting system, the sound propagation area will overlap, and the strength of the sound signal collected by each microphone will be different. Therefore, this embodiment first calibrates the specific audio signal, which helps the microphones in each subsequent device to accurately collect the standard strength corresponding to the second sub-signal at its location, avoiding abnormal positioning inaccuracy due to different installation locations, and having higher reliability. Among them, the calibration of the audio signal can adopt conventional methods, which are not limited here.

[0040] Specifically, in S14, the first preset criterion is: An absolute value of a strength difference between the second sub-signal and the specific audio signal exceeds a first preset threshold.

[0041] When the absolute value of the intensity difference between the second sub-signal and the specific audio signal exceeds the first preset threshold, it means that the difference between the second sub-signal and the specific audio signal is large, and the two are inconsistent, then there is an abnormality in the first broadcasting device, which may be a fault in the microphone or a fault in the first speaker. This embodiment directly implements the comparison between the two sound signals based on the intensity value of the sound signal, with high accuracy, in line with the actual situation of the broadcasting equipment in the vehicle-mounted PIS system, and with high reliability.

[0042] Specifically, the preset frequency and preset intensity of the specific audio signal in the present embodiment and the first preset threshold in the first preset criterion can be selected according to actual conditions and are not limited here.

[0043] Preferably, the first broadcasting device has a first preset loop current value when normal; the first abnormal location detection result includes that the first speaker in the first broadcasting device is faulty and the microphone in the first broadcasting device is faulty; Then in this embodiment S2A, abnormality positioning is performed on the first broadcasting device according to the detected first line current, and a first abnormality positioning detection result is output, including: S2A1: comparing the detected first line current with the first preset loop current value; S2A2: If the comparison is inconsistent, determining that the first abnormal positioning detection result is that the first speaker in the first broadcasting device is faulty; otherwise, determining that the first abnormal positioning detection result is that the microphone in the first broadcasting device is faulty.

[0044] In the first broadcasting 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 consistent, it means that the actually detected first line current has not increased or decreased, and its fluctuation is normal, then the first speaker is working normally, and the abnormality in the first broadcasting device is caused by a microphone failure, that is, the first abnormal positioning detection result can be determined as a microphone failure in the first broadcasting device; if they are inconsistent, it means that the actually detected line current has increased or decreased, and its fluctuation is abnormal, then the abnormality in the first broadcasting device is caused by a first speaker failure, that is, the first abnormal positioning detection result can be determined as a first speaker failure in the first broadcasting device. Through the above method, the abnormal positioning of the first broadcasting device can be achieved efficiently and accurately with high reliability.

[0045] In the present embodiment S2B, for the abnormality detection of the second broadcasting device, the current of the second line is firstly collected by the current collection module configured by the second broadcasting device, and then it is determined whether the external line loop of the entire second broadcasting device is abnormal, that is, it is determined whether there is a fault in the second speaker of the second broadcasting device. The current collection module is specifically arranged on the parallel circuit of all the second speakers, and is respectively connected to the power amplifier module of the second broadcasting device to realize the speaker function and the guest room control host (that is, Figure 5 Controller in the Figure 5 shown.

[0046] The second line current collected by the current collection module can determine whether the speaker line loop of the entire second broadcasting device is normal, that is, whether there is a second speaker failure. Specifically, the speakers in the second broadcasting 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 voice coil burnout, a line break, or other faults, or one or more of the second speakers have a fault in the drive circuit. 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 fault.

[0047] Preferably, in this embodiment S2B, each of the second broadcasting devices has a second preset loop current value when normal; In S2B, judging whether the second broadcasting device is abnormal according to the detected second line current includes: S2B1: comparing the detected second line current with the second preset loop current value; S2B2: If the comparison is inconsistent, it is determined that the second broadcasting device is abnormal; otherwise, it is determined that the second broadcasting device is normal.

[0048] When the second broadcasting device is normal, all the second speakers therein are also normal, and the second broadcasting 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 ),in, I 总 Refers to the total current (i.e. the preset loop current value) when all the second speakers in the second broadcasting device are working normally. n Refers to the total number of loudspeakers in the second broadcasting device, I i额 Refers to the second broadcasting device iThe rated current of the second speaker under normal operation.

[0049] In the second broadcasting device, the second line current actually detected by the current detection module is compared with the corresponding second preset loop current value. If they are consistent, it means that the second line current actually detected has not increased or decreased, and its fluctuation is normal, then all the second speakers are working normally, and the second broadcasting device can be regarded as normal; if they are inconsistent, it means that the second line current actually detected has increased or decreased, and its fluctuation is abnormal, then one or more speakers in all the second speakers are faulty, and the second broadcasting device can be regarded as abnormal. For the second broadcasting device, abnormality detection can be quickly and accurately achieved directly based on the second line current.

[0050] Preferably, the second sound signal includes a third sub-signal and a plurality of fourth sub-signals, wherein 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 in a one-to-one manner; Then in S2B, when the second broadcasting device is abnormal, the second speaker and the microphone are controlled to work respectively, and the microphone is controlled to collect a second sound signal according to a second preset sound collection strategy, and the second broadcasting device is abnormally located according to the collected second sound signal, and a second abnormal location detection result is output, including: S2B3: controlling the microphone in the first broadcasting device to work and collect the third sub-signal; wherein the third sub-signal is a second environmental sound when no loudspeaker emits sound in the environment where the microphone is located; 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 signals are specifically audio signals with preset frequency and preset intensity; S2B5: Control the microphone in the first broadcasting device to work and collect each of the fourth sub-signals respectively; wherein the fourth sub-signal is a sound synthesized by the processed specific audio signal output by the corresponding second speaker and the second environmental sound in the environment where the microphone is located; S2B6: Compare each of the fourth sub-signals with the specific audio signal respectively; if the fourth sub-signal and the specific audio signal satisfy a second preset criterion, determine that the second abnormality location detection result is that the second speaker corresponding to the fourth sub-signal has an abnormality.

[0051] In the abnormal location of the second broadcasting device, firstly, the microphone in the first broadcasting device is controlled to collect the second environmental sound when no speaker makes a sound, which can facilitate the removal of the influence of the environmental sound during the subsequent comparative analysis. After collecting the second environmental sound (i.e., the third sub-signal), each second speaker in the second broadcasting device is controlled to output the processed specific audio signal, which can ensure that each second speaker participates in the work under the same conditions, and then facilitates the subsequent analysis of the second speaker that has failed under the same conditions, ensuring the reliability of abnormal location. Finally, the microphone is controlled to collect each fourth sub-signal respectively. At this time, due to the participation of the second speaker, if the second speaker has not failed, the comparison of the sound signal should be consistent. If a failure occurs, the comparison will be inconsistent. Therefore, this embodiment can directly use the comparison of the second sound signal to accurately and efficiently realize the abnormal location of the second speaker through the collection of the second sound signal by the microphone, and can accurately and quickly locate the second speaker with a fault, so that the relevant personnel can repair it in time.

[0052] Specifically, similar to the aforementioned first preset sound collection strategy, in step S2B3, the guest room control host controls all the second speakers therein to be muted (i.e., no speaker makes any sound), and then the controller in the first broadcasting device is used to control 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.

[0053] Specifically, before step S2B4, the method further includes: The specific audio signal is calibrated.

[0054] Similar to the first preset sound collection strategy mentioned above, by calibrating the specific audio signal, it is more conducive to the subsequent microphone to accurately collect the standard intensity corresponding to the fourth sub-signal at its location, avoiding abnormal positioning inaccuracy due to different installation positions, and improving reliability.

[0055] The specific audio signal in the second preset sound collection strategy may be the same as or different from the specific audio signal in the first preset sound collection strategy.

[0056] In this embodiment, the calibration of the specific audio signal adopts a conventional calibration method, such as determining a reference level, and based on the reference level, using an audio analyzer to calibrate the amplitude of the specific audio signal; then using a standard signal source to output a signal of known frequency, and based on the signal of known frequency, using a spectrum analyzer to calibrate the frequency of the specific audio signal.

[0057] Similarly, in S2B4, the processed specific audio signal is specifically the sound obtained by performing a difference operation between the specific audio signal and the second ambient sound.

[0058] Similarly, by processing the above-mentioned specific audio signal, it is convenient to determine whether the fourth sub-signal collected by the microphone in the actual collection process is consistent with the specific audio signal during subsequent actual comparative analysis, thereby locating the fault of the second speaker.

[0059] Specifically, in the above S2B5, the second preset criterion is: An absolute value of a strength difference between the fourth sub-signal and the specific audio signal exceeds a second preset threshold.

[0060] 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 fourth sub-signal and the specific audio signal are significantly different and inconsistent. Similar to the aforementioned first preset criterion, this embodiment implements the comparison between the two sound signals based on sound intensity, with high accuracy, in line with the actual situation of the broadcasting equipment in the vehicle-mounted PIS system, and with high reliability.

[0061] The second preset threshold mentioned above can also be preset and adjusted according to actual conditions, and this embodiment does not limit this.

[0062] Specifically, in an optional embodiment, a second broadcasting device is judged to be abnormal through the 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 after the difference operation between signal B and signal A, that is, C=BA; then the fourth sub-signal D collected by the microphone should theoretically be D=B-A+A=B; in actual comparison, if the absolute value of the intensity difference between signal D and signal B exceeds the second preset threshold, it means 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 the fourth sub-signal is faulty and needs to be repaired.

[0063] Specifically, in this embodiment, when the PIS broadcasting system is subjected to abnormal self-detection, on the one hand, the controller arranged in the broadcasting control box in the driver's cab first controls the microphone and the first speaker inside it to perform detection according to step S1, and when it is determined that an abnormality has occurred, controls the correspondingly configured current detection module to perform abnormal location according to the above-mentioned step S2A to locate the position of the first speaker or microphone where the abnormality has occurred; on the other hand, a broadcasting system diagnostic command is sent through the broadcasting control box arranged in the driver's cab, and the driver's cab control host transmits the diagnostic command to each passenger compartment host after receiving the diagnostic command, and the passenger compartment host sends the diagnostic command to the passenger emergency alarm in the passenger compartment, and the controller in the emergency alarm first controls the microphone and the first speaker inside it after receiving the diagnostic command. The device performs detection according to step S1, and when it is determined that an abnormality occurs, it controls the correspondingly configured current detection module to perform abnormal location according to the above step S2A, and locates the position of the first speaker or microphone where the abnormality occurs; in addition, the passenger room host also sends a diagnostic command to the current detection module corresponding to each second broadcasting device, and performs abnormal detection according to the above step S2B. When it is determined that an abnormality occurs in the second broadcasting device, it controls all the second speakers in the second broadcasting device and the microphone in the passenger alarm in the passenger room to perform abnormal location according to the above step S2B, and then sends the position of the located second speaker to the passenger room host, and transmits it back to the driver's room host through the passenger room host; the abnormal self-detection and abnormal location of the broadcasting equipment in each driver's room and each passenger room are realized respectively.

[0064] Embodiment 2

[0065] like Figure 6 As shown, an abnormality self-detection system of a PIS broadcasting system is applied to the abnormality self-detection method of the PIS broadcasting system of Example 1, the PIS broadcasting system includes a first broadcasting device and a second broadcasting device, the first broadcasting device includes a microphone and a first speaker, the second broadcasting device includes a plurality of second speakers, each of the second speakers is located within the sound collection range of the microphone; wherein the first broadcasting device and the second broadcasting device are both configured with a current detection module; The self-test system includes: a first abnormality detection unit, configured to control the first speaker and the microphone to work respectively in the first broadcasting device, and control the microphone to collect a first sound signal according to a first preset sound collection strategy, and determine whether the first broadcasting device has an abnormality according to the first sound signal; A first abnormality locating unit is configured to detect a first line current of the first broadcasting device in real time by using the current detection module configured corresponding to the first broadcasting device when the first abnormality detection unit detects that the first broadcasting device is abnormal; and locate the abnormality of the first broadcasting device according to the detected first line current, and output a first abnormality locating detection result; a second abnormality detection unit, configured to detect the second line current of the second broadcasting device in real time by using the current detection module configured corresponding to the second broadcasting device when the first abnormality detection unit detects that the first broadcasting device is normal; and determine whether the second broadcasting device is abnormal according to the detected second line current; The second abnormality locating unit is used to control the second speaker and the microphone to work respectively when the second abnormality detection unit detects that the second broadcasting device has an abnormality, and control the microphone to collect a second sound signal according to a second preset sound collection strategy, and locate the abnormality of the second broadcasting device according to the collected second sound signal, and output a second abnormality locating detection result.

[0066] In this embodiment, the broadcasting equipment in the PIS broadcasting system includes two types, the first type is a first broadcasting device having both microphone and speaker functions, and the second type is a second broadcasting device having only a speaker function; for the first type of broadcasting device, the first abnormality detection unit is used to directly collect the first sound signal through its own microphone according to the first preset sound collection strategy to realize its own abnormality self-detection; when it itself is abnormal, since it may be that the microphone is abnormal or the first speaker is abnormal, the first abnormality locating unit is used, combined with the first line current detected by the configured current detection module to realize abnormality locating and output the corresponding first abnormality locating detection result, which can realize both abnormality detection and abnormality locating only through its own device structure; and for the second type of broadcasting device, since it only includes the second speaker, Therefore, the second abnormality detection unit is first used to determine whether the external line loop of the entire second broadcasting device is abnormal through the second line current detected by the configured current detection module, and then determine whether there is a second speaker in the second broadcasting device that fails, so as to realize abnormality detection of this type of broadcasting device; when the external line loop of the second broadcasting device is abnormal, that is, when the second speaker fails, since the second speaker is located within the sound collection range of the microphone in the first broadcasting device, the second abnormality locating unit is used to use the microphone in the first broadcasting device to collect the second sound signals separately according to the second preset sound collection strategy, and the abnormality positioning of the second broadcasting device can be realized based on the analysis of the second sound signals collected by the microphone. Similarly, only the equipment structure of the PIS broadcasting system itself is used to realize both abnormality detection and abnormality positioning.

[0067] The abnormality self-detection system of the PIS broadcasting system of this embodiment can realize abnormality self-detection and abnormality positioning of two types of broadcasting equipment based on the equipment structure of the broadcasting equipment itself in the PIS broadcasting system, and accurately locate the faulty microphone or speaker when an abnormality occurs, thereby effectively improving the reliability of abnormality detection of the PIS broadcasting system and facilitating subsequent maintenance.

[0068] The functions of each unit in the abnormal self-detection system of the PIS broadcasting system described in this embodiment correspond to the steps of the abnormal self-detection method of the PIS broadcasting system in Example 1. For details not included in this embodiment, please refer to Example 1 and Figures 1 to 5 The detailed description will not be repeated here.

[0069] Embodiment 3

[0070] like Figure 7 As shown, an abnormality self-detection device of a PIS broadcasting system, the PIS broadcasting system includes a first broadcasting device and a second broadcasting device, the first broadcasting device includes a microphone and a first speaker, the second broadcasting device includes a plurality of second speakers, each of the second speakers is located within the sound collection range of the microphone; The abnormality self-detection device comprises: At least two current detection modules are respectively arranged corresponding to the first broadcasting device and the second broadcasting device; the current detection module arranged corresponding to the first broadcasting device is used to detect the first line current in the corresponding first broadcasting device in real time, and the current detection module arranged corresponding to the second broadcasting device is used to detect the second line current in the corresponding second broadcasting device in real time; The abnormality self-detection system of the PIS broadcasting system of the second embodiment is communicatively connected with the microphone, the first speaker, all the second speakers and all the current detection modules; The abnormal self-detection system of the PIS broadcasting system is used to: In the first broadcasting device, the first speaker and the microphone are controlled to work respectively, and according to a first preset sound collection strategy, the microphone is controlled to collect a first sound signal, and whether the first broadcasting device is abnormal is determined according to the first sound signal; When the first broadcasting device is abnormal, the first line current detected by the current detection module configured corresponding to the first broadcasting device is received; and the first broadcasting device is abnormally located according to the first line current, and a first abnormal location detection result is output; When the first broadcasting device is normal, the second line current detected by the current detection module corresponding to the configuration of the second broadcasting device is received; and according to the second line current, whether the second broadcasting device is abnormal is determined; when the second broadcasting device is abnormal, the second speaker and the microphone are controlled to work respectively, and according to the second preset sound collection strategy, the microphone is controlled to collect the second sound signal, the second broadcasting device is abnormally located according to the collected second sound signal, and a second abnormal location detection result is output.

[0071] In this embodiment, based on the abnormality self-detection system of the PIS broadcasting system in Example 2, the communication and interaction with the microphone, the first speaker, all the second speakers and all the current detection modules can respectively realize the abnormality self-detection and abnormality positioning of the two broadcasting devices based on the device structure of the broadcasting device itself in the PIS broadcasting system, and accurately locate the faulty microphone or speaker when an abnormality occurs, thereby effectively improving the reliability of abnormality detection of the PIS broadcasting system and facilitating subsequent maintenance.

[0072] The abnormality self-detection system of the PIS broadcasting system in this embodiment has the same structure as the abnormality self-detection system of the PIS broadcasting system in the second embodiment. Therefore, for details not provided in this embodiment, please refer to the first embodiment, the second embodiment and the Figures 1 to 6 The detailed description will not be repeated here.

[0073] Embodiment 4

[0074] This embodiment provides another abnormality self-detection device for a PIS broadcasting system, including a processor, a memory, and a computer program stored in the memory and executable on the processor. When the computer program is executed, the method steps in the abnormality self-detection method for the PIS broadcasting system of the first embodiment are implemented.

[0075] Through the computer program stored in the memory and running on the processor, based on the equipment structure of the broadcasting equipment itself in the PIS broadcasting system, it is possible to realize the abnormality self-detection and abnormality positioning of the two types of broadcasting equipment respectively, and accurately locate the faulty microphone or speaker when an abnormality occurs, thereby effectively improving the reliability of abnormality detection of the PIS broadcasting system and facilitating subsequent maintenance.

[0076] The processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc. The processor is the control center of a computer device, and uses various interfaces and lines to connect various parts of the entire computer device.

[0077] The memory can be used to store computer programs and / or models. The processor realizes various functions of the computer device by running or executing the computer programs and / or models stored in the memory and calling the data stored in the memory. The memory can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system and at least one application required for a 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 a high-speed random access memory and can also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (SmartMedia Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0078] It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of the processes and / or blocks in the flowchart and / or block diagram, can be implemented by a computer program. These computer programs can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0079] These computer programs may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device, which implements the process Figure 1A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0080] These computer programs can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, so that the instructions executed on the computer or other programmable device provide instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0081] This embodiment further provides a computer storage medium, which includes: at least one instruction, which implements the method steps in the abnormality self-detection method of the PIS broadcasting system of embodiment 1 when the instruction is executed.

[0082] By executing a computer storage medium containing at least one instruction, based on the device structure of the broadcasting device itself in the PIS broadcasting system, it is possible to respectively implement abnormality self-detection and abnormality positioning of the two types of broadcasting equipment, and accurately locate the faulty microphone or speaker when an abnormality occurs, thereby effectively improving the reliability of abnormality detection of the PIS broadcasting system and facilitating subsequent maintenance.

[0083] Similarly, for details not yet included in the fourth embodiment, please refer to the first embodiment, the second embodiment, the third embodiment and the Figures 1 to 7 The detailed description will not be repeated here.

[0084] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A method for self-detecting abnormality in a PIS broadcasting system, characterized in that: The PIS broadcasting system includes a first broadcasting device and a second broadcasting device, wherein the first broadcasting device includes a microphone and a first speaker, and the second broadcasting device includes a plurality of second speakers, each of which is located within the sound collection range of the microphone; wherein the first broadcasting device and the second broadcasting device are both equipped with a current detection module; The method comprises: In the first broadcasting device, the first speaker and the microphone are controlled to work respectively, and according to a first preset sound collection strategy, the microphone is controlled to collect a first sound signal, and whether the first broadcasting device is abnormal is determined according to the first sound signal; When the first broadcasting device is abnormal, the current detection module configured corresponding to the first broadcasting device is used to detect the first line current of the first broadcasting device in real time; and the first broadcasting device is abnormally located according to the detected first line current, and a first abnormal location detection result is output; When the first broadcasting device is normal, the current detection module corresponding to the second broadcasting device is used to detect the second line current of the second broadcasting device in real time; and based on the detected second line current, it is determined whether the second broadcasting device is abnormal; when the second broadcasting device is abnormal, the second speaker and the microphone are controlled to work respectively, and according to the second preset sound collection strategy, the microphone is controlled to collect the second sound signal, the second broadcasting device is abnormally located according to the collected second sound signal, and a second abnormal location detection result is output.

2. The method according to claim 1, characterized in that The first sound signal includes a first sub-signal and a second sub-signal; In the first broadcasting device, controlling the first speaker and the microphone to work respectively, and controlling the microphone to collect a first sound signal according to a first preset sound collection strategy, and judging whether the first broadcasting device is abnormal according to the first sound signal, includes: In the first broadcasting device, the microphone is controlled to work and the first sub-signal is collected; wherein the first sub-signal is a first environmental sound in an environment where the microphone is located and no loudspeaker emits sound; Controlling 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; Controlling the microphone to work and collect the second sub-signal; wherein the second sub-signal is a sound synthesized from the processed specific audio signal output by the first speaker and the first environmental sound in the environment where the microphone is located; The second sub-signal is compared 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 broadcasting device is abnormal; otherwise, it is determined that the first broadcasting device is normal.

3. The method according to claim 2, characterized in that The processed specific audio signal is specifically the sound obtained by performing a difference operation between the specific audio signal and the first ambient sound.

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

5. The method according to claim 3, characterized in that: Before controlling the first speaker to work and outputting the processed specific audio signal, the method further includes: The specific audio signal is calibrated.

6. The method according to claim 1, characterized in that The first broadcasting device has a first preset loop current value when normal; the first abnormal location detection result includes that the first speaker in the first broadcasting device is faulty and the microphone in the first broadcasting device is faulty; The method includes performing abnormal location detection on the first broadcasting device according to the detected first line current and outputting a first abnormal location detection result, including: comparing the detected first line current with the first preset loop current value; If the comparison is inconsistent, it is determined that the first abnormal positioning detection result is that the first speaker in the first broadcasting device is faulty; otherwise, it is determined that the first abnormal positioning detection result is that the microphone in the first broadcasting device is faulty.

7. The method according to claim 1, characterized in that The second broadcasting device has a second preset loop current value when normal; Judging whether the second broadcasting device is abnormal according to the detected second line current includes: comparing the detected second line current with the second preset loop current value; If the comparison is inconsistent, it is determined that the second broadcasting device is abnormal; otherwise, it is determined that the second broadcasting device is normal.

8. The method according to claim 1, characterized in that The second sound signal includes a third sub-signal and a plurality of fourth sub-signals, wherein the number of the fourth sub-signals is the same as the number of the second speakers, and all the fourth sub-signals correspond one-to-one to all the second speakers; When the second broadcasting device is abnormal, the second speaker and the microphone are controlled to work respectively, and the microphone is controlled to collect a second sound signal according to a second preset sound collection strategy, the second broadcasting device is abnormally located according to the collected second sound signal, and a second abnormal location detection result is output, including: Controlling the microphone in the first broadcasting device to work and collect the third sub-signal; wherein the third sub-signal is a second environmental sound when no loudspeaker emits sound in the environment where the microphone is located; Controlling each of the second speakers in the second broadcasting device to work and output the processed specific audio signals respectively; wherein the specific audio signals are specifically audio signals with a preset frequency and a preset intensity; Controlling the microphone in the first broadcasting device to work and collect each of the fourth sub-signals respectively; wherein the fourth sub-signal is a sound synthesized from the processed specific audio signal output by the corresponding second speaker and the second environmental sound in the environment where the microphone is located; Each of the fourth sub-signals is compared with the specific audio signal respectively; if the fourth sub-signal and the specific audio signal satisfy a second preset criterion, it is determined that the second abnormality location detection result is that the second speaker corresponding to the fourth sub-signal has an abnormality.

9. The method according to claim 8, characterized in that Before controlling the microphone in the first broadcasting device to operate and collecting the third sub-signal, the method further includes: The specific audio signal is calibrated.

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

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

12. An abnormality self-detection system for a PIS broadcasting system, characterized in that: In the abnormality self-detection method of the PIS broadcasting system according to any one of claims 1 to 11, the PIS broadcasting system includes a first broadcasting device and a second broadcasting device, the first broadcasting device includes a microphone and a first speaker, the second broadcasting device includes a plurality of second speakers, and each of the second speakers is located within the sound collection range of the microphone; wherein the first broadcasting device and the second broadcasting device are both configured with a current detection module; include: a first abnormality detection unit, configured to control the first speaker and the microphone to work respectively in the first broadcasting device, and control the microphone to collect a first sound signal according to a first preset sound collection strategy, and determine whether the first broadcasting device has an abnormality according to the first sound signal; A first abnormality locating unit is configured to detect the first line current of the first broadcasting device in real time by using the current detection module configured corresponding to the first broadcasting device when the first abnormality detection unit detects that the first broadcasting device is abnormal; and locate the abnormality of the first broadcasting device according to the detected first line current, and output a first abnormality locating detection result; a second abnormality detection unit, configured to detect the second line current of the second broadcasting device in real time by using the current detection module configured corresponding to the second broadcasting device when the first abnormality detection unit detects that the first broadcasting device is normal; and determine whether the second broadcasting device is abnormal according to the detected second line current; The second abnormality locating unit is used to control the second speaker and the microphone to work respectively when the second abnormality detection unit detects that the second broadcasting device has an abnormality, and control the microphone to collect a second sound signal according to a second preset sound collection strategy, and locate the abnormality of the second broadcasting device according to the collected second sound signal, and output a second abnormality locating detection result.

13. An abnormality self-detection device for a PIS broadcasting system, characterized in that: The PIS broadcasting system includes a first broadcasting device and a second broadcasting device, wherein the first broadcasting device includes a microphone and a first speaker, and the second broadcasting device includes a plurality of second speakers, each of which is located within the sound collection range of the microphone; include: At least two current detection modules are respectively arranged corresponding to the first broadcasting device and the second broadcasting device; the current detection module arranged corresponding to the first broadcasting device is used to detect the first line current in the corresponding first broadcasting device in real time, and the current detection module arranged corresponding to the second broadcasting device is used to detect the second line current in the corresponding second broadcasting device in real time; The abnormality self-detection system of the PIS broadcasting system as claimed in claim 12, being 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 broadcasting system is used to: In the first broadcasting device, the first speaker and the microphone are controlled to work respectively, and according to a first preset sound collection strategy, the microphone is controlled to collect a first sound signal, and whether the first broadcasting device is abnormal is determined according to the first sound signal; When the first broadcasting device is abnormal, the first line current detected by the current detection module configured corresponding to the first broadcasting device is received; and the first broadcasting device is abnormally located according to the first line current, and a first abnormal location detection result is output; When the first broadcasting device is normal, the second line current detected by the current detection module corresponding to the configuration of the second broadcasting device is received; and according to the second line current, whether the second broadcasting device is abnormal is determined; when the second broadcasting device is abnormal, the second speaker and the microphone are controlled to work respectively, and according to the second preset sound collection strategy, the microphone is controlled to collect the second sound signal, the second broadcasting device is abnormally located according to the collected second sound signal, and a second abnormal location detection result is output.

14. A computer storage medium, characterized in that: The computer storage medium comprises: 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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