A back-end receiving device for a distress caller with image transmission function

Abstract

The present invention relates to the technical field of image transmission of a distress caller, and specifically discloses a distress caller back-end receiving device with an image transmission function, including a back-end receiving terminal, the back-end receiving terminal is connected to a number of distress calls via wireless communication, and the back-end receiving terminal includes an image data wireless transmission module, an image transmission state analysis module, an image transmission state optimization module, an optimization signal feedback module, a display warning module, and a database. Through multiple aspects of data transmission state analysis, the accuracy of the image data transmission state evaluation results corresponding to each distress caller in each data transmission period is greatly improved, the image data transmission stability between the distress caller and the back-end receiving terminal is evaluated, potential problems in the image data transmission process are discovered in a timely manner, the use of the distress caller back-end receiving device is optimized in a targeted manner, the reliability and efficiency of image transmission are improved, and the rescue work is ensured to proceed smoothly.

Description

Technical Field

[0001] The invention relates to the technical field of image transmission of a distress call device, and in particular to a distress call device back-end receiving device with an image transmission function. Background Art

[0002] The firefighters' back-field receiving device is one of the conventional equipment specially used for fire fighting and rescue work. The firefighters' back-field receiving device mainly includes a control circuit board and a monitoring platform. The monitoring platform communicates wirelessly with the distress caller carried by the on-site rescue personnel. The distress caller is an intelligent instrument equipped for the rescue personnel entering the scene to ensure their life safety. Through wireless communication, the air pressure data of the air respirator and the vital signs and movement status of the on-site rescue personnel are transmitted to the firefighters' back-field receiving device in real time and displayed on the monitoring platform; the monitoring platform not only monitors and records the on-site conditions of the rescue personnel in real time, but also has the functions of calling and directing the on-site rescue personnel.

[0003] The existing fire scene distress call system can basically meet the needs of short-distance voice transmission. However, when encountering disasters such as earthquakes, rescue workers have to go deep into places where the terrain is unclear for search and rescue. In some areas where the terrain features are not obvious, especially those damaged after the disaster, even if people communicate with each other by voice, they cannot accurately describe their location, nor can they accurately describe how they entered the disaster area or the route. Therefore, it is particularly important to obtain images of the environment around the personnel. However, there is no early warning for image data transmission failures between the distress caller and the back-end receiving device, and the response timeliness is poor. Therefore, the image data transmission status between the distress caller and the back-end receiving device is not stable enough. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a back-end receiving device of a distress caller with an image transmission function, in order to solve the above-mentioned technical defects.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a backfield receiving device for a distress caller with an image transmission function, comprising a backfield receiving terminal, wherein the backfield receiving terminal is connected to a plurality of distress calls via wireless communication, wherein the backfield receiving terminal comprises an image data wireless transmission module, an image transmission state analysis module, an image transmission state optimization module, an optimization signal feedback module, a display warning module and a database, wherein the image data wireless transmission module is connected to the image transmission state analysis module, the image transmission state analysis module is respectively connected to the image transmission state optimization module and the display warning module, the image transmission state optimization module is respectively connected to the optimization signal feedback module and the database, and the optimization signal feedback module is connected to the image data wireless transmission module;

[0006] An image data wireless transmission module is used to wirelessly transmit the image data of each transmission time point in each data transmission period corresponding to each distress caller, obtain the image data of each transmission time point in each data transmission period corresponding to each distress caller, and acquire the transmission parameters through a network monitoring tool based on the image data of each transmission time point in each data transmission period corresponding to each distress caller, and obtain the transmission parameters of each transmission time point in each data transmission period corresponding to each distress caller;

[0007] The image transmission state analysis module is used to analyze the state of the transmission parameters of each transmission time point in each data transmission period corresponding to each distress caller, and obtain the transmission state evaluation index of the image data transmission in each data transmission period corresponding to each distress caller;

[0008] The image transmission device optimization module is used to compare and analyze the transmission state evaluation index of the image data transmission in each data transmission period corresponding to each distress caller, and obtain the transmission optimization signal of the image data transmission in each data transmission period corresponding to each distress caller;

[0009] The optimization signal feedback module is used to perform feedback processing of corresponding optimization measures on the transmission optimization signal of the image data transmission in each data transmission period corresponding to each distress call device;

[0010] A display warning module is used to display the transmission parameters of each distress call device at each transmission time point in each data transmission period under a fault state and to provide a fault warning;

[0011] The database is used to store various transmission parameters and various transmission status evaluation index thresholds obtained by each distress caller in each data transmission period.

[0012] Furthermore, the transmission parameters include delay time, packet loss rate and bandwidth.

[0013] Furthermore, the state analysis of the transmission parameters of each distress caller at each transmission time point in each data transmission period is performed in the following specific analysis method:

[0014] Extract the delay time of each transmission time point of each distress caller corresponding to each data transmission period from the transmission parameters of each distress caller corresponding to each data transmission period, calculate the average delay time of each distress caller corresponding to each data transmission period, and obtain the average delay time of each distress caller corresponding to each data transmission period, which is recorded as YS i j , i represents the number of each distress caller, i = 1, 2, ..., n, n represents the total number of distress calls, j represents the number of each transmission period, j = 1, 2, ..., m, m represents the total number of each transmission period;

[0015] From the delay time of each transmission time point in each data transmission period corresponding to each caller, extract the maximum delay time and the minimum delay time in each data transmission period corresponding to each caller, and record them as YS ij max and YS ij min ;

[0016] According to the formula Calculate the delay evaluation index YC of each distress caller corresponding to each data transmission period i j , ΔYS represents the allowable delay time difference of each distress caller in each data transmission period, a1 and a2 represent the set weight factors, a1=0.56, a2=0.63 respectively;

[0017] Extract the packet loss rate of each time point in each data transmission period corresponding to each caller from the transmission parameters of each time point in each data transmission period corresponding to each caller, calculate the average packet loss rate of each time point in each data transmission period corresponding to each caller, and obtain the average packet loss rate of each data transmission period corresponding to each caller, which is recorded as DB i j ;

[0018] The maximum packet loss rate and the minimum packet loss rate of each helper in each data transmission period are extracted from the delay time of each transmission time point in each data transmission period corresponding to each helper, and are recorded as DB ij max and DB ij min ;

[0019] According to the formula Calculate the delay evaluation index DP of each distress caller in each data transmission period i j , ΔDB represents the difference in the allowed packet loss rate of each distress caller in each data transmission period, b1 and b2 represent the set weight factors, b1 = 1.53, a2 = 1.21;

[0020] The bandwidth of each time point in each data transmission period corresponding to each caller is extracted from the transmission parameters of each time point in each data transmission period corresponding to each caller, and the bandwidth of each time point in each data transmission period corresponding to each caller is averaged to obtain the average bandwidth of each data transmission period corresponding to each caller, which is recorded as DK i j ;

[0021] The maximum bandwidth and minimum bandwidth of each distress caller in each data transmission period are extracted from the delay time of each transmission time point in each data transmission period corresponding to each distress caller, and are recorded as DKij max and DK ij min ;

[0022] According to the formula Calculate the bandwidth evaluation index KP of each distress caller in each data transmission period i j , b1 and b2 represent the set weight factors, b1=0.32, a2=0.15 respectively.

[0023] Furthermore, the delay evaluation index in each data transmission period corresponding to each distress caller, the packet loss evaluation index in each data transmission period corresponding to each distress caller, and the bandwidth evaluation index in each data transmission period corresponding to each distress caller constitute a transmission status evaluation index of the image data transmission in each data transmission period corresponding to each distress caller.

[0024] Furthermore, the transmission status evaluation index of the image data transmission in each data transmission period corresponding to each distress call device is compared and analyzed, and the specific comparative analysis method is as follows:

[0025] Obtain the delay evaluation index threshold value set for each distress caller in each data transmission period from the database, compare the delay evaluation index of each distress caller in each data transmission period with the set delay evaluation index threshold value, if the delay evaluation index of a distress caller in a data transmission period is greater than the set delay evaluation index threshold value, it indicates that the transmission delay time of the distress caller in the data transmission period is abnormal, and a delay time optimization signal is generated; otherwise, it indicates that the transmission delay time of the distress caller in the data transmission period is normal, and a delay time normal signal is generated;

[0026] Obtaining from the database the packet loss assessment index thresholds set for each distress call device in each data transmission period, comparing the packet loss assessment index of each distress call device in each data transmission period with the set packet loss assessment index thresholds; if the packet loss assessment index of a distress call device in a data transmission period is greater than the set packet loss assessment index threshold, it indicates that the transmission packet loss rate of the distress call device in the data transmission period is abnormal, and a packet loss rate optimization signal is generated; otherwise, it indicates that the transmission packet loss rate of the distress call device in the data transmission period is normal, and a packet loss rate normal signal is generated;

[0027] The bandwidth evaluation index threshold value set for each distress caller in each data transmission period is obtained from the database, and the bandwidth evaluation index of each distress caller in each data transmission period is compared with the set bandwidth evaluation index threshold value. If the bandwidth evaluation index of a distress caller in a data transmission period is greater than the set bandwidth evaluation index threshold value, it indicates that the transmission bandwidth of the distress caller in the data transmission period is abnormal, and a bandwidth optimization signal is generated. Otherwise, it indicates that the transmission bandwidth of the distress caller in the data transmission period is normal, and a normal bandwidth signal is generated.

[0028] Furthermore, the delay time optimization signal, the packet loss rate optimization signal and the bandwidth optimization signal in each data transmission period corresponding to each distress caller constitute a transmission optimization signal for image data transmission in each data transmission period corresponding to each distress caller.

[0029] Beneficial effects of the present invention:

[0030] 1. In the present invention, the image data of each transmission time point in each data transmission period corresponding to each distress call is monitored and acquired in real time, so as to obtain the transmission parameters of each distress call at each transmission time point in each data transmission period. Specifically, the delay time, packet loss rate and bandwidth in the transmission parameters of each distress call at each transmission time point in each data transmission period are analyzed respectively, so as to obtain the delay evaluation index, packet loss evaluation index and bandwidth evaluation index in each data transmission period corresponding to each distress call. Through the data transmission status analysis from multiple aspects, the accuracy of the image data transmission status evaluation results of each distress call corresponding to each data transmission period is greatly improved, the stability of the image data transmission between the distress call and the back-end receiving terminal is evaluated, the potential problems existing in the image data transmission process are discovered in time, the use of the back-end receiving device of the distress call is optimized in a targeted manner, the reliability and efficiency of the image transmission are improved, and the rescue work is ensured to be carried out smoothly.

[0031] 2. In the present invention, by comparing and analyzing the delay evaluation index, packet loss evaluation index and bandwidth evaluation index in each data transmission period corresponding to each distress caller with the set delay evaluation index threshold, packet loss evaluation index threshold and bandwidth evaluation index threshold, various optimization signals in each data transmission period corresponding to each distress caller are generated. According to the frequencies of various optimization signals in each data transmission period corresponding to each distress caller, the stability of the image data transmission process between the distress caller and the backfield receiving terminal can be effectively evaluated, and then the data transmission failure that may exist in the image data transmission process can be responded to in time to ensure the stable transmission of image data during the use of the distress caller. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] Figure 1The figure is a connection diagram between a back-end receiving terminal and a distress call device according to an embodiment of the present invention.

[0034] Figure 2 The figure is a principle block diagram of a module in a backfield receiving terminal according to an embodiment of the present invention. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present invention.

[0036] As shown in the present invention and claims, unless the context clearly indicates an exception, the words "a", "an", "an" and / or "the" do not refer to the singular, but also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list, and the method or device may also include other steps or elements.

[0037] Although the present invention has made various references to certain modules in the system according to an embodiment of the present invention, any number of different modules can be used and run on a user terminal and / or server. The modules are only illustrative, and different aspects of the system and method can use different modules.

[0038] The present invention uses a flow chart to illustrate the operations performed by the system according to an embodiment of the present invention. It should be understood that the preceding or following operations are not necessarily performed precisely in order. On the contrary, various steps may be processed in reverse order or simultaneously as required. At the same time, other operations may also be added to these processes, or one or more operations may be removed from these processes.

[0039] Below, the exemplary embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments of the present invention, and it should be understood that the present invention is not limited to the exemplary embodiments described here.

[0040] Embodiment 1:

[0041] See also Figure 1 and Figure 2 As shown, a back-end receiving device of a distress caller with an image transmission function includes a back-end receiving terminal, and the back-end receiving terminal is connected to a plurality of distress calls via wireless communication.

[0042] The backfield receiving terminal includes an image data wireless transmission module, an image transmission status analysis module, an image transmission status optimization module, an optimization signal feedback module, a display warning module and a database, wherein the image data wireless transmission module is connected to the image transmission status analysis module, the image transmission status analysis module is respectively connected to the image transmission status optimization module and the display warning module, the image transmission status optimization module is respectively connected to the optimization signal feedback module and the database, and the optimization signal feedback module is connected to the image data wireless transmission module.

[0043] Furthermore, each distress call is provided with a camera inside, through which image data around the distress call is collected. Each distress call is also integrated with an image processing module, a Beidou positioning module and a wireless communication transmission module. The camera is used to collect image data around. The image data passes through the image processing module and is packaged into several image data packets. The packaged image data packets are then sent to the backfield receiving terminal for image display through the wireless communication transmission module. By transmitting the image to the backfield command center in real time, rescue personnel can better understand the situation and take appropriate actions.

[0044] The image data wireless transmission module is used to wirelessly transmit the image data of each transmission time point in each data transmission period corresponding to each distress caller, obtain the image data of each transmission time point in each data transmission period corresponding to each distress caller, and acquire the transmission parameters through the network monitoring tool based on the image data of each transmission time point in each data transmission period corresponding to each distress caller, and obtain the transmission parameters of each transmission time point in each data transmission period corresponding to each distress caller.

[0045] Furthermore, the transmission parameters include delay time, packet loss rate and bandwidth, and the network monitoring tool is Wireshark.

[0046] The image transmission status analysis module is used to analyze the transmission parameters of each distress caller at each transmission time point in each data transmission period, and obtain the transmission status evaluation index of the image data transmission in each data transmission period corresponding to each distress caller. The specific analysis method is as follows:

[0047] Extract the delay time of each transmission time point of each distress caller corresponding to each data transmission period from the transmission parameters of each distress caller corresponding to each data transmission period, calculate the average delay time of each distress caller corresponding to each data transmission period, and obtain the average delay time of each distress caller corresponding to each data transmission period, which is recorded as YS i j , i represents the number of each distress caller, i=1,2,...,n, n represents the total number of distress calls, j represents the number of each transmission period, j=1,2,...,m, m represents the total number of each transmission period.

[0048] From the delay time of each transmission time point in each data transmission period corresponding to each caller, extract the maximum delay time and the minimum delay time in each data transmission period corresponding to each caller, and record them as YS ij max and YS ij min .

[0049] The delay evaluation index of each distress caller in each data transmission period is obtained by substituting the average delay time, the maximum delay time and the minimum delay time of each distress caller in each data transmission period into the analysis formula for calculation.

[0050] The specific calculation method is as follows:

[0051] According to the formula Calculate the delay evaluation index YC of each distress caller corresponding to each data transmission period i j , ΔYS represents the allowable delay time difference of each distress caller in each data transmission period, a1 and a2 represent the set weight factors, a1=0.56, a2=0.63 respectively.

[0052] Specifically, when the average delay time of a certain distress caller corresponding to a certain data transmission period is 280ms, the maximum delay time and the minimum delay time of the distress caller corresponding to the data transmission period are extracted as 420ms and 190ms respectively, and the allowable delay time difference of the distress caller corresponding to the data transmission period is set to 30ms. The above values ​​are custom values ​​given by technicians, and the technicians in this field can make reasonable custom settings according to the actual situation. Substituting the above values ​​into the formula, the delay evaluation index of the distress caller corresponding to the data transmission period is calculated to be 0.653; take 3 decimal places.

[0053] Extract the packet loss rate of each time point in each data transmission period corresponding to each caller from the transmission parameters of each time point in each data transmission period corresponding to each caller, calculate the average packet loss rate of each time point in each data transmission period corresponding to each caller, and obtain the average packet loss rate of each data transmission period corresponding to each caller, which is recorded as DB i j .

[0054] The maximum packet loss rate and the minimum packet loss rate of each helper in each data transmission period are extracted from the delay time of each transmission time point in each data transmission period corresponding to each helper, and are recorded as DB ij max and DB ij min .

[0055] The packet loss evaluation index of each distress caller in each data transmission period is obtained by substituting the average packet loss rate, the maximum packet loss rate and the minimum packet loss rate of each distress caller in each data transmission period into the analysis formula for calculation.

[0056] The specific calculation method is as follows:

[0057] According to the formula Calculate the delay evaluation index DP of each distress caller in each data transmission period i j , ΔDB represents the difference in the allowed packet loss rate of each distress caller in each data transmission period, b1 and b2 represent the set weight factors, b1=1.53, a2=1.21.

[0058] Specifically, when the average packet loss rate of a certain distress call device corresponding to a certain data transmission period is 3.5, the maximum packet loss rate and the minimum packet loss rate of the distress call device corresponding to the data transmission period are extracted as 6.5 and 1.2 respectively, and the allowable packet loss rate difference of the distress call device corresponding to the data transmission period is set to 1.5. The above values ​​are custom values ​​given by technical personnel, and the technical personnel in this field can make reasonable custom settings according to the actual situation. Substituting the above values ​​into the formula, the packet loss evaluation index of the distress call device corresponding to the data transmission period is calculated to be 2.061; take 3 decimal places.

[0059] The bandwidth of each time point in each data transmission period corresponding to each caller is extracted from the transmission parameters of each time point in each data transmission period corresponding to each caller, and the bandwidth of each time point in each data transmission period corresponding to each caller is averaged to obtain the average bandwidth of each data transmission period corresponding to each caller, which is recorded as DK i j .

[0060] The maximum bandwidth and minimum bandwidth of each distress caller in each data transmission period are extracted from the delay time of each transmission time point in each data transmission period corresponding to each distress caller, and are recorded as DK ij max and DK ij min .

[0061] The bandwidth evaluation index of each distress caller in each data transmission period is obtained by substituting the average bandwidth, maximum bandwidth and minimum bandwidth of each distress caller in each data transmission period into the analysis formula for calculation.

[0062] The specific calculation method is as follows:

[0063] According to the formula Calculate the bandwidth evaluation index KP of each distress caller in each data transmission period ij , b1 and b2 represent the set weight factors, b1=0.32, a2=0.15 respectively.

[0064] Specifically, when the average bandwidth of a certain distress call device corresponding to a certain data transmission period is 80Kbps, the maximum bandwidth and minimum bandwidth of the distress call device corresponding to the data transmission period are extracted as 120Kbps and 60Kbps respectively. The above values ​​are custom values ​​given by technicians, and the technicians in this field can make reasonable custom settings according to the actual situation. Substituting the above values ​​into the formula, the bandwidth evaluation index of the distress call device corresponding to the data transmission period is calculated to be 33.617; take the last 3 decimal places.

[0065] The transmission state evaluation index of the image data transmission in each data transmission period corresponding to each help caller is composed of the delay evaluation index in each data transmission period corresponding to each help caller, the packet loss evaluation index in each data transmission period corresponding to each help caller, and the bandwidth evaluation index in each data transmission period corresponding to each help caller.

[0066] In a specific embodiment, the present invention obtains the image data of each transmission time point in each data transmission period corresponding to each distress caller by real-time monitoring, and obtains the transmission parameters of each transmission time point in each data transmission period corresponding to each distress caller. Specifically, the delay time, packet loss rate and bandwidth in the transmission parameters of each transmission time point in each data transmission period corresponding to each distress caller are analyzed respectively to obtain the delay evaluation index, packet loss evaluation index and bandwidth evaluation index in each data transmission period corresponding to each distress caller. Through the data transmission status analysis from multiple aspects, the accuracy of the image data transmission status evaluation results of each distress caller in each data transmission period is greatly improved, the image data transmission stability between the distress caller and the back-end receiving terminal is evaluated, potential problems in the image data transmission process are discovered in time, the use of the back-end receiving device of the distress caller is optimized in a targeted manner, the reliability and efficiency of image transmission are improved, and the rescue work is ensured to proceed smoothly.

[0067] The image transmission device optimization module is used to compare and analyze the transmission state evaluation index of the image data transmission in each data transmission period corresponding to each distress caller, and obtain the transmission optimization signal of the image data transmission in each data transmission period corresponding to each distress caller. The specific comparison and analysis method is as follows:

[0068] The delay evaluation index threshold value set for each distress caller in each data transmission period is obtained from the database, and the delay evaluation index of each distress caller in each data transmission period is compared with the set delay evaluation index threshold value. If the delay evaluation index of a distress caller in a data transmission period is greater than the set delay evaluation index threshold value, it means that the transmission delay time of the distress caller corresponding to the data transmission period is abnormal, and a delay time optimization signal is generated; otherwise, it means that the transmission delay time of the distress caller corresponding to the data transmission period is normal, and a normal delay time signal is generated.

[0069] Specifically, the delay evaluation index threshold set for each distress caller corresponding to each data transmission period is 0.855. At the same time, the delay evaluation index of a distress caller corresponding to the first data transmission period is calculated to be 0.912, and the delay evaluation index in the second data transmission period is calculated to be 0.653. This means that the transmission delay time of the distress caller corresponding to the first data transmission period is abnormal, and a delay time optimization signal is generated. The transmission delay time of the second data transmission period is normal, and a delay time normal signal is generated.

[0070] The packet loss assessment index threshold value of each distress call corresponding to each data transmission period is obtained from the database, and the packet loss assessment index of each distress call corresponding to each data transmission period is compared with the set packet loss assessment index threshold value. If the packet loss assessment index of a distress call corresponding to a data transmission period is greater than the set packet loss assessment index threshold value, it means that the transmission packet loss rate of the distress call corresponding to the data transmission period is abnormal, and a packet loss rate optimization signal is generated. Otherwise, it means that the transmission packet loss rate of the distress call corresponding to the data transmission period is normal, and a normal packet loss rate signal is generated.

[0071] Specifically, the packet loss assessment index threshold set for each distress caller in each data transmission period is 3.865. At the same time, the packet loss assessment index of a distress caller in the first data transmission period is calculated to be 4.131, and the packet loss assessment index in the second data transmission period is 2.061. This means that the transmission packet loss rate of the distress caller in the first data transmission period is abnormal, and a packet loss rate optimization signal is generated. The transmission packet loss rate in the second data transmission period is normal, and a normal packet loss rate signal is generated.

[0072] The bandwidth evaluation index threshold value set for each distress caller in each data transmission period is obtained from the database, and the bandwidth evaluation index of each distress caller in each data transmission period is compared with the set bandwidth evaluation index threshold value. If the bandwidth evaluation index of a distress caller in a data transmission period is greater than the set bandwidth evaluation index threshold value, it indicates that the transmission bandwidth of the distress caller in the data transmission period is abnormal, and a bandwidth optimization signal is generated. Otherwise, it indicates that the transmission bandwidth of the distress caller in the data transmission period is normal, and a normal bandwidth signal is generated.

[0073] Specifically, the bandwidth evaluation index threshold set for each distress caller in each data transmission period is 42.150. At the same time, the bandwidth evaluation index of a distress caller in the first data transmission period is calculated to be 45.183, and the bandwidth evaluation index in the second data transmission period is 33.617. This means that the transmission bandwidth of the distress caller in the first data transmission period is abnormal, and a bandwidth optimization signal is generated. The transmission bandwidth of the second data transmission period is normal, and a normal bandwidth signal is generated.

[0074] The delay time optimization signal, the packet loss rate optimization signal and the bandwidth optimization signal in each data transmission period corresponding to each distress caller constitute the transmission optimization signal for image data transmission in each data transmission period corresponding to each distress caller.

[0075] In a specific embodiment, the present invention generates various types of optimization signals in each data transmission period corresponding to each distress caller by comparing and analyzing the delay assessment index, packet loss assessment index and bandwidth assessment index in each data transmission period corresponding to each distress caller with the set delay assessment index threshold, packet loss assessment index threshold and bandwidth assessment index threshold respectively. According to the frequencies of various types of optimization signals in each data transmission period corresponding to each distress caller, the stability of the image data transmission process between the distress caller and the backfield receiving terminal can be effectively evaluated, and then the data transmission failures that may exist in the image data transmission process can be responded to in a timely manner to ensure the stable transmission of image data during the use of the distress caller.

[0076] The optimization signal feedback module is used to perform feedback processing of corresponding optimization measures on the transmission optimization signal of the image data transmission in each data transmission period corresponding to each distress call device.

[0077] The specific optimization measures are as follows: when a transmission optimization signal corresponding to a data transmission period of a certain distress call is received, the image data packet size transmitted by the distress call corresponding to the data transmission period is reduced before transmission is performed, and then the image transmission status analysis module is used to calculate and obtain the optimized transmission status evaluation index of the distress call corresponding to the data transmission period, and the optimized transmission status evaluation index of the distress call corresponding to the data transmission period is obtained. The optimized transmission status evaluation index of the distress call corresponding to the data transmission period is compared and analyzed with the corresponding status evaluation index threshold. If the comparison and analysis result still generates a transmission optimization signal of the distress call corresponding to the data transmission period, the transmission parameters of each transmission time point in the data transmission period of the distress call corresponding to the data transmission period are displayed through the display warning module, and a fault reminder is issued.

[0078] The display and warning module is used to display the transmission parameters of each distress call device at each transmission time point in a fault state in each data transmission period and to provide fault warning.

[0079] The database is used to store various transmission parameters and various transmission status evaluation index thresholds obtained by each distress caller in each data transmission period.

[0080] The above formulas are all dimensionless and numerical calculations. The formula is a formula that is obtained by collecting a large amount of data and performing software simulation to obtain the most recent real situation. The size of the coefficient is to quantify each parameter to obtain a specific value. Regarding the size of the coefficient, it is acceptable as long as it does not affect the proportional relationship between the parameter and the quantified value.

[0081] In addition, those skilled in the art will appreciate that various aspects of the present invention may be illustrated and described by a number of patentable categories or situations, including any new and useful process, machine, product or combination of substances, or any new and useful improvements thereto. Accordingly, various aspects of the present invention may be performed entirely by hardware, entirely by software (including firmware, resident software, microcode, etc.), or by a combination of hardware and software. The above hardware or software may all be referred to as "data blocks", "modules", "engines", "units", "components" or "systems". In addition, various aspects of the present invention may be represented as a computer product located in one or more computer-readable media, which includes computer-readable program code.

[0082] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the invention belongs. It should also be understood that terms such as those defined in common dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined as such herein.

[0083] The above is an explanation of the present invention and should not be considered as a limitation thereof. Although several exemplary embodiments of the present invention have been described, it will be readily appreciated by those skilled in the art that many modifications may be made to the exemplary embodiments without departing from the novel teachings and advantages of the present invention. Therefore, all such modifications are intended to be included within the scope of the present invention as defined in the claims. It should be understood that the above is an explanation of the present invention and should not be considered as being limited to the specific embodiments disclosed, and modifications to the disclosed embodiments and other embodiments are intended to be included within the scope of the appended claims. The present invention is defined by the claims and their equivalents.

Claims

1. A back-end receiving device for a distress caller with an image transmission function, comprising a back-end receiving terminal, wherein the back-end receiving terminal is connected to a plurality of distress calls via wireless communication, and is characterized in that: The backstage receiving terminal includes an image data wireless transmission module, an image transmission state analysis module, an image transmission state optimization module, an optimization signal feedback module, a display warning module and a database, wherein the image data wireless transmission module is connected to the image transmission state analysis module, the image transmission state analysis module is respectively connected to the image transmission state optimization module and the display warning module, the image transmission state optimization module is respectively connected to the optimization signal feedback module and the database, and the optimization signal feedback module is connected to the image data wireless transmission module; An image data wireless transmission module is used to wirelessly transmit the image data of each transmission time point in each data transmission period corresponding to each distress caller, obtain the image data of each transmission time point in each data transmission period corresponding to each distress caller, and acquire the transmission parameters through a network monitoring tool based on the image data of each transmission time point in each data transmission period corresponding to each distress caller, and obtain the transmission parameters of each transmission time point in each data transmission period corresponding to each distress caller; The image transmission state analysis module is used to analyze the state of the transmission parameters of each transmission time point in each data transmission period corresponding to each distress caller, and obtain the transmission state evaluation index of the image data transmission in each data transmission period corresponding to each distress caller; The state analysis is performed on the transmission parameters of each distress caller at each transmission time point in each data transmission period. The specific analysis method is as follows: Extract the delay time of each transmission time point of each distress caller corresponding to each data transmission period from the transmission parameters of each distress caller corresponding to each data transmission period, calculate the average delay time of each distress caller corresponding to each data transmission period, and obtain the average delay time of each distress caller corresponding to each data transmission period, which is recorded as YS i j , i represents the number of each distress caller, i = 1, 2, ..., n, n represents the total number of distress calls, j represents the number of each transmission period, j = 1, 2, ..., m, m represents the total number of each transmission period; From the delay time of each transmission time point in each data transmission period corresponding to each caller, extract the maximum delay time and the minimum delay time in each data transmission period corresponding to each caller, and record them as YS ij max and YS ij min ; According to the formula Calculate the delay evaluation index YC of each distress caller corresponding to each data transmission period i j , ΔYS represents the allowable delay time difference of each distress caller in each data transmission period, a1 and a2 represent the set weight factors, a1=0.56, a2=0.63 respectively; Extract the packet loss rate of each time point in each data transmission period corresponding to each caller from the transmission parameters of each time point in each data transmission period corresponding to each caller, calculate the average packet loss rate of each time point in each data transmission period corresponding to each caller, and obtain the average packet loss rate of each data transmission period corresponding to each caller, which is recorded as DB i j ; The maximum packet loss rate and the minimum packet loss rate of each helper in each data transmission period are extracted from the delay time of each transmission time point in each data transmission period corresponding to each helper, and are recorded as DB ij max and DB ij min ; According to the formula Calculate the packet loss evaluation index DP of each distress caller in each data transmission period i j , ΔDB represents the difference in the allowed packet loss rate of each distress caller in each data transmission period, b1 and b2 represent the set weight factors, b1 = 1.53, a2 = 1.21; The bandwidth of each time point in each data transmission period corresponding to each caller is extracted from the transmission parameters of each time point in each data transmission period corresponding to each caller, and the bandwidth of each time point in each data transmission period corresponding to each caller is averaged to obtain the average bandwidth of each data transmission period corresponding to each caller, which is recorded as DK i j ; The maximum bandwidth and minimum bandwidth of each distress caller in each data transmission period are extracted from the delay time of each transmission time point in each data transmission period corresponding to each distress caller, and are recorded as DK ij max and DK ij min ; According to the formula Calculate the bandwidth evaluation index KP of each distress caller in each data transmission period i j , b1, b2 represent the set weight factors, b1 = 0.32, a2 ​​= 0.15; The delay evaluation index in each data transmission period corresponding to each call for help, the packet loss evaluation index in each data transmission period corresponding to each call for help, and the bandwidth evaluation index in each data transmission period corresponding to each call for help constitute a transmission state evaluation index for image data transmission in each data transmission period corresponding to each call for help; The transmission status evaluation index of the image data transmission in each data transmission period corresponding to each distress call device is compared and analyzed. The specific comparative analysis method is as follows: Obtain the delay evaluation index threshold value set for each distress caller in each data transmission period from the database, compare the delay evaluation index of each distress caller in each data transmission period with the set delay evaluation index threshold value, if the delay evaluation index of a distress caller in a data transmission period is greater than the set delay evaluation index threshold value, it indicates that the transmission delay time of the distress caller in the data transmission period is abnormal, and a delay time optimization signal is generated; otherwise, it indicates that the transmission delay time of the distress caller in the data transmission period is normal, and a delay time normal signal is generated; Obtaining from the database the packet loss assessment index thresholds set for each distress call device in each data transmission period, comparing the packet loss assessment index of each distress call device in each data transmission period with the set packet loss assessment index thresholds; if the packet loss assessment index of a distress call device in a data transmission period is greater than the set packet loss assessment index threshold, it indicates that the transmission packet loss rate of the distress call device in the data transmission period is abnormal, and a packet loss rate optimization signal is generated; otherwise, it indicates that the transmission packet loss rate of the distress call device in the data transmission period is normal, and a packet loss rate normal signal is generated; Obtaining from the database the bandwidth evaluation index thresholds set for each distress caller in each data transmission period, comparing the bandwidth evaluation index of each distress caller in each data transmission period with the set bandwidth evaluation index thresholds; if the bandwidth evaluation index of a distress caller in a data transmission period is greater than the set bandwidth evaluation index threshold, it indicates that the transmission bandwidth of the distress caller in the data transmission period is abnormal, and a bandwidth optimization signal is generated; otherwise, it indicates that the transmission bandwidth of the distress caller in the data transmission period is normal, and a bandwidth normal signal is generated; The image transmission device optimization module is used to compare and analyze the transmission state evaluation index of the image data transmission in each data transmission period corresponding to each distress caller, and obtain the transmission optimization signal of the image data transmission in each data transmission period corresponding to each distress caller; The optimization signal feedback module is used to perform feedback processing of corresponding optimization measures on the transmission optimization signal of the image data transmission in each data transmission period corresponding to each distress call device; A display warning module is used to display the transmission parameters of each distress call device at each transmission time point in each data transmission period under a fault state and to provide a fault warning; The database is used to store various transmission parameters and various transmission status evaluation index thresholds obtained by each distress caller in each data transmission period.

2. The back-end receiving device of a distress caller with image transmission function according to claim 1, characterized in that: The transmission parameters include delay time, packet loss rate and bandwidth.

3. The back-end receiving device of a distress caller with image transmission function according to claim 1, characterized in that: The delay time optimization signal, the packet loss rate optimization signal and the bandwidth optimization signal in each data transmission period corresponding to each distress caller constitute a transmission optimization signal for image data transmission in each data transmission period corresponding to each distress caller.

Images