An integrated emergency communication system for cable tunnels

Abstract

The present invention discloses a comprehensive emergency communication system for cable tunnels. The present invention relates to the technical field of tunnel communication, and solves the problem that the optimal operating frequency of communication devices is not confirmed, resulting in large fluctuations in signal delay during the later use of such communication devices, affecting communication accuracy. The present invention performs preliminary testing on the communication devices used in the cable tunnel. During the testing process, the operating frequency is gradually adjusted, and the corresponding signal delay is identified based on the adjustment process. Then, based on the specific numerical performance state, the optimal frequency range of this communication device is selected from among them. Subsequently, during the actual application process, the optimal frequency is selected from the optimal frequency range as the operating frequency and used accordingly, so that the emergency communication devices inside the cable tunnel are in the best operating state.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel communication, and particularly to a comprehensive emergency communication system for cable tunnels. Background Art

[0002] In a cable tunnel, in order to monitor the numerical operation status of relevant cables in real time, relevant signal communication devices need to be set at the cables to send the operation signals of the cables to the main device in real time, so as to facilitate the main device to monitor the operation conditions of the relevant cables in the tunnel in real time.

[0003] During the signal transmission and communication process of the communication device, due to the inconsistent density and thickness of the soil layer in some areas of the tunnel, when the communication device operates according to the originally set operating frequency, the signal delay of the communication is relatively large, which will affect the overall monitoring effect in the later stage. Before the communication device is used, the best operating frequency of such a communication device is not confirmed, resulting in a large fluctuation in the signal delay of such a communication device during the later use process, affecting the communication accuracy. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a comprehensive emergency communication system for cable tunnels, which solves the problem that the best operating frequency of the communication device is not confirmed, resulting in a large fluctuation in the signal delay of such a communication device during the later use process, affecting the communication accuracy.

[0005] To achieve the above purposes, the present invention is realized through the following technical solutions: A comprehensive emergency communication system for cable tunnels includes a test layer and a monitoring layer. Among them, the test end conducts communication tests on the communication device to select the best working frequency range, and the monitoring layer conducts relevant monitoring on the communication device and determines whether frequency adjustment is required based on the monitoring results;

[0006] The test layer includes:

[0007] An initial test end conducts test processing on the communication device, and based on a relevant signal receiver, identifies different signal delays generated by this communication device in different operating frequency states;

[0008] A test data analysis end confirms the signal delay change curve according to the signal delays corresponding to the real-time changing operating frequencies, and then selects a standard line segment from the signal delay change curve based on a preset standard delay parameter. The specific method is as follows:

[0009] According to the different signal delays corresponding to different operating frequencies, relevant coordinate points are determined in a two-dimensional coordinate system. The horizontal axis of the coordinate system is the operating frequency, and the vertical axis of the coordinate system is the signal delay. Based on the determined several coordinate points, the signal delay change curve in this test stage is confirmed;

[0010] Based on the preset standard delay parameter, find the relevant numerical points on the vertical axis of the two-dimensional coordinate system, construct a set of relevant lines perpendicular to the vertical axis, mark the partial line segments below this relevant line within the signal delay change curve as standard line segments, and transmit the marked standard line segments to the optimal frequency selection end;

[0011] The optimal frequency selection end successively determines the fluctuation points existing therein from the marked standard line segments, then based on the numerical performance of the signal delay between the fluctuation points, identifies whether the line segments between the fluctuation points belong to the same-frequency line segments, and then selects the optimal line segment from several groups of same-frequency line segments, marks the operating frequency associated with this optimal line segment as the optimal frequency and determines the optimal frequency range. The specific method is as follows:

[0012] Identify the change parameters of adjacent points within the standard line segment. The change parameter = the signal delay of the latter point - the signal delay of the former point. When the positive and negative states of the change parameters generated by a certain point and its front and rear points are opposite, mark a certain point as a fluctuation point, and determine one by one the several fluctuation points existing within the standard line segment;

[0013] Mark both the initial point and the end point within the standard line segment as fluctuation points, and mark the signal delays corresponding to the successively appearing fluctuation points as XH i , where i = 1, 2,..., n. When i is 1, it represents the first group of fluctuation points, and when i is n, it represents the last group of fluctuation points;

[0014] Identify the difference in signal delay between adjacent fluctuation points: Starting from the first group of fluctuation points and the second group of fluctuation points, confirm the difference C1 in the signal delay of the first group:

[0015] If |C1| ≤ Y1, where Y1 is a preset value, mark the line segment between the first group of fluctuation points and the second group of fluctuation points as a same-frequency line segment, then identify the difference C2 between the second group of fluctuation points and the third group of fluctuation points. If |C2| ≤ Y1, then mark the line segment between the first group of fluctuation points and the third group of fluctuation points as a same-frequency line segment. If |C2| > Y1, then starting from the third group of fluctuation points, perform difference confirmation backward to identify the second group of same-frequency line segments;

[0016] If |C1| > Y1, then starting from the second group of fluctuation points, confirm the difference C2 in the signal delay between the second group of fluctuation points and the third group of fluctuation points, and identify the verification situation of the absolute value of C2 and Y1, and identify and mark one by one the subsequent same-frequency line segments that appear;

[0017] From several groups of co-frequency line segments that have been calibrated, confirm the operating frequency corresponding to the starting point of the corresponding co-frequency line segment and the operating frequency corresponding to the ending point, identify the frequency difference, and the frequency difference = the operating frequency of the ending point - the operating frequency of the starting point. From the frequency differences corresponding to different co-frequency line segments, select the maximum value, and calibrate the co-frequency line segment corresponding to this maximum value as the optimal line segment. Calibrate all the operating frequencies associated with the optimal line segment as the optimal frequencies, determine the optimal frequency range, and transmit the determined optimal frequency range to the monitoring layer.

[0018] Preferably, within the initial test terminal, the operating frequency gradually changes from small to large, and both the minimum value and the maximum value of the changing operating frequency are preset values. Its signal delay is the time difference between the signal generation time and the reception time.

[0019] Preferably, the monitoring layer includes:

[0020] A periodic monitoring terminal selects a set of optimal frequencies from the optimal frequency range as the operating frequency of this communication device, keeps the communication device in a signal transmission state all the time, conducts periodic monitoring, and transmits the relevant signal delays of the periodic monitoring to the compliance determination terminal. The specific period of the periodic monitoring is a preset period;

[0021] A compliance determination terminal, based on the relevant signal delays during the periodic monitoring process and the preset standard delay parameter, identifies the proportion of the duration of the standard delay in the entire periodic monitoring process. Based on the determined specific proportion result, determines whether this communication device is operating up to standard. The specific method is as follows:

[0022] Based on the relevant signal delays corresponding to different moments during the periodic monitoring process, calibrate the relevant signal delays that are not higher than the standard delay parameter as the standard delay;

[0023] Based on the determined standard delay, determine its continuous duration within the entire period, and then determine its proportion of the duration. The proportion of the duration = continuous duration ÷ total period duration;

[0024] Compare the proportion of the duration with the preset value Y2. When the proportion of the duration ≥ Y2, calibrate this communication device as a compliant device; otherwise, calibrate this communication device as a non-compliant device;

[0025] An associated adjustment terminal, based on the calibrated non-compliant devices, adjusts the operating frequencies of such devices. Based on the performance of the corresponding signal delays after the operating frequency adjustment, make the operating state of this device reach the optimal state. The specific method is as follows:

[0026] Based on the determined optimal frequency range, adjust the operating frequency of this non-compliant device upwards, and the adjustment range does not exceed this optimal frequency range. Identify whether the signal delay generated by the non-compliant device decreases:

[0027] If it decreases, continuously adjust until the signal delay no longer decreases and then stop;

[0028] If it does not decrease, adjust the operating frequency downward and identify whether the signal delay generated by this device decreases. If it decreases, continuously adjust until the signal delay no longer decreases and then stop. If it does not decrease, directly generate an error signal for display.

[0029] The present invention provides a comprehensive emergency communication system for cable tunnels. Compared with the prior art, it has the following beneficial effects:

[0030] In the present invention, through the initial test processing of the communication equipment used in the cable tunnel, during the test process, the operating frequency is gradually adjusted, and the corresponding signal delay is identified based on the adjustment process. Then, based on the specific numerical performance status, the optimal frequency range of this communication equipment is selected. Subsequently, during the actual application process, the optimal frequency is selected from the optimal frequency range as the operating frequency and used accordingly, so that the emergency communication equipment inside the cable tunnel is in the best operating state;

[0031] Subsequently, relevant monitoring is carried out on the emergency communication equipment inside the cable tunnel, and based on the specific monitoring results, it is identified whether the signal delay generated by the emergency communication equipment during communication meets the standard. From the specific determination results identified, it is evaluated whether this communication equipment is operating normally, and then the non-compliant communication equipment is adjusted in association to make the relevant communication equipment reach the best operating state and ensure the normal communication of the corresponding emergency signals in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic diagram of the principle framework of the present invention;

[0033] Figure 2 is a schematic diagram of the monitoring of the communication equipment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] Embodiment 1

[0036] Please refer to Figure 1, this application provides an integrated emergency communication system for cable tunnels, including a test layer and a monitoring layer. The test terminal conducts communication tests on communication devices to select the best working frequency range. The monitoring layer monitors the communication devices and determines whether frequency adjustment is required based on the monitoring results;

[0037] Among them, the test layer includes:

[0038] The preliminary test terminal, the test data analysis terminal, and the best frequency selection terminal, where the preliminary test terminal, the test data analysis terminal, and the best frequency selection terminal are electrically connected in sequence from the output node to the input node;

[0039] Among them, the preliminary test terminal conducts test processing on the communication device. Based on the relevant signal receiver, it identifies the different signal time delays generated by this communication device under different operating frequency states. Its operating frequency changes gradually from small to large, and both the minimum and maximum values of the changed operating frequencies are preset values. The signal time delay is the time difference between the signal generation time and the reception time. In order to test in which working frequency state this communication device can achieve the best signal emission state, it is necessary to adjust its corresponding working frequency and identify the signal time delays generated by this communication device under different working frequency states. Based on its specific numerical performance state and the overall performance result of the signal time delay, to determine its best operating frequency;

[0040] Among them, the test data analysis terminal confirms the signal time delay change curve based on the signal time delay corresponding to the real-time changing operating frequency, and then selects the standard line segment from the signal time delay change curve based on the preset standard time delay parameter. Specifically, when the signal time delay changes, some time delay data are standard and some are not. Then, according to the set relevant standards, the relevant line segments with qualified time delay data can be identified from the signal time delay change curve, and such relevant line segments belong to the standard line segments. Among them, the specific method for selecting the standard line segment is:

[0041] Based on the different signal time delays corresponding to different operating frequencies, determine the relevant coordinate points in the two-dimensional coordinate system. The horizontal axis of the coordinate system is the operating frequency, and the vertical axis of the coordinate system is the signal time delay. Based on the determined several coordinate points, confirm the signal time delay change curve in this test stage;

[0042] Based on a preset standard delay parameter, find the relevant numerical point positions on the vertical axis of the two-dimensional coordinate system (this relevant numerical point position is the position where the standard delay parameter is located), construct a set of relevant lines, the relevant lines are perpendicular to the vertical axis, and mark the part of the signal delay change curve below this relevant line as the standard line segment, and transmit the processed standard line segment to the optimal frequency selection end. The standard line segment is not limited to only one set. Because in the actual segmentation process, the original values are in a continuous state, but after being divided based on the determined standard delay parameter, there may be multiple sets of line segments below this standard delay parameter, so there will be multiple sets of standard line segments. After division, due to the line segment break phenomenon, there will be multiple sets of standard line segments.

[0043] Among them, the optimal frequency selection end sequentially determines the fluctuation points existing inside the calibrated standard line segment, and then based on the numerical performance of the signal delay between the fluctuation points, identifies whether the line segment between the fluctuation points belongs to the same-frequency line segment, and then selects the optimal line segment from several sets of same-frequency line segments, calibrates the operating frequency associated with this optimal line segment as the optimal frequency and determines the optimal frequency range. Specifically, the so-called corresponding same-frequency line segment is a line segment with an unobvious fluctuation state, and its fluctuation range is within the acceptable range, without any significant numerical fluctuations. Then, the corresponding same-frequency line segments can be confirmed one by one, and based on the overall performance of the same-frequency line segments, the optimal line segment with the best performance is selected. Among them, the specific method for determining the optimal frequency range is as follows:

[0044] Identify the change parameter of adjacent point positions from the standard line segment. The change parameter = the signal delay of the latter point position - the signal delay of the former point position. When the positive and negative states of the change parameters generated by a certain point position and its adjacent front and rear point positions are opposite (specifically, the change parameter between the front point position and this point position is positive, and the change parameter between the latter point position and this point position is negative, then the two change parameters are in the positive and negative opposite states. Similarly, if the change parameter in front is negative and the change parameter behind is positive, then the two change parameters are also in the positive and negative opposite states), mark a certain point position as a fluctuation point, and determine one by one the several fluctuation points existing in the standard line segment;

[0045] Mark both the initial point and the end point in the standard line segment as fluctuation points, and calibrate the signal delay corresponding to the sequentially appearing fluctuation points as XH i , where i = 1, 2,..., n. When i is 1, it represents the first group of fluctuation points, and when i is n, it represents the last group of fluctuation points;

[0046] Identify the difference in signal delay between adjacent fluctuation points: Starting from the first group of fluctuation points and the second group of fluctuation points, confirm the difference C1 in the signal delay of the first group:

[0047] If |C1| ≤ Y1, where Y1 is a preset value, and its specific value is determined by the operator according to experience, the line segment between the first set of fluctuation points and the second set of fluctuation points is calibrated as a same-frequency line segment. Then, identify the difference C2 between the second set of fluctuation points and the third set of fluctuation points. If |C2| ≤ Y1, the line segment between the first set of fluctuation points and the third set of fluctuation points is calibrated as a same-frequency line segment. If |C2| > Y1, start from the third set of fluctuation points and perform difference confirmation backward to identify the second same-frequency line segment (this same-frequency line segment is different from the same-frequency line segment confirmed for the first time).

[0048] If |C1| > Y1, start from the second set of fluctuation points, confirm the difference C2 in signal time delay between the second set of fluctuation points and the third set of fluctuation points, and identify the comparison situation between the absolute value of C2 and Y1. Identify the subsequent same-frequency line segments and calibrate them one by one.

[0049] From the several sets of calibrated same-frequency line segments, confirm the operating frequency corresponding to the starting point of the corresponding same-frequency line segment and the operating frequency corresponding to the ending point, identify their frequency difference, and the frequency difference = ending point operating frequency - starting point operating frequency (since the numerical positions are sorted from front to back and the frequency gradually increases, the confirmed frequency difference must be greater than 0). From the frequency differences corresponding to different same-frequency line segments, select the maximum value, calibrate the same-frequency line segment corresponding to this maximum value as the best line segment, calibrate all the operating frequencies associated with the best line segment as the best frequencies, determine the best frequency range, and transmit the determined best frequency range to the monitoring layer.

[0050] The comparison process here is understood in combination with an example: Suppose a set of standard line segments has five sets of fluctuation points, and the signal time delays corresponding to each fluctuation point are: 1, 2, 0.5, 4, 3. Suppose Y1 takes the value of 1. The difference between the first set of fluctuation points and the second set of fluctuation points is |1 - 2| = 1, so it meets the condition, and the line segment between the two fluctuation points belongs to the first same-frequency line segment. The numerical difference between the second set of fluctuation points and the third set of fluctuation points is 1.5, which exceeds the preset value, so it does not belong to the same-frequency line segment. Confirm backward in turn, and the line segment associated with the last two fluctuation points also belongs to the relevant same-frequency line segment. Then, the same-frequency line segments can be calibrated one by one from front to back.

[0051] Embodiment 2

[0052] In the specific implementation process of this embodiment, compared with the above embodiment, in the specific implementation process of this embodiment, it mainly focuses on the monitoring and adjustment process of the relevant frequencies of communication devices. During the operation of the monitoring layer, the operating frequencies used by the communication devices belong to the frequencies within the best frequency range.

[0053] Among them, the monitoring layer includes: a periodic monitoring terminal, a compliance determination terminal, and an associated adjustment terminal, and the periodic monitoring terminal, the compliance determination terminal, and the associated adjustment terminal are electrically connected in sequence from the output node to the input node;

[0054] The periodic monitoring terminal selects a set of optimal frequencies from the optimal frequency range as the operating frequency of this communication device, enables the communication device to always be in a signal transmission state, conducts periodic monitoring, and transmits the relevant signal delays of the periodic monitoring to the compliance determination terminal in a time-delay manner. The specific period of the periodic monitoring is a preset period, which is determined in advance by the operator according to experience;

[0055] Among them, the compliance determination terminal, based on the relevant signal delays during the periodic monitoring and the preset standard delay parameters, identifies the proportion of the duration of the standard delay in the entire periodic monitoring process. Based on the determined specific proportion result, it determines whether this communication device is operating up to standard. The specific method of determination is as follows:

[0056] Based on the relevant signal delays corresponding to different moments during the periodic monitoring, the relevant signal delays not higher than the standard delay parameters are calibrated as the standard delay;

[0057] Based on the determined standard delay, determine its continuous duration within the entire period, and then determine its duration proportion, where the duration proportion = continuous duration ÷ total period duration;

[0058] Compare the duration proportion with the preset value Y2. When the duration proportion ≥ Y2, this communication device is calibrated as a compliant device; otherwise, this communication device is calibrated as a non-compliant device. The specific value of Y2 is determined by the operator according to experience. The reason for using the method of comparing numerical proportions is to consider the situation of numerical fluctuations. When there are relevant fluctuations in the corresponding signal delays, there will be cases where the signal delays are higher than the standard delay parameters, so the determined duration proportion will not be 100%. Therefore, Y2 generally takes a value of 90% considering the relevant fluctuations in the signal transmission.

[0059] Among them, the associated adjustment terminal, based on the calibrated non-compliant devices, adjusts the operating frequencies of such devices. Based on the performance of the corresponding signal delays after the operating frequencies are adjusted, the operating state of this device is brought to the best state. The specific method of adjusting the operating frequencies is as follows:

[0060] Based on the determined optimal frequency range, adjust the operating frequency of this non-compliant device upward, with the adjustment range not exceeding this optimal frequency range. Identify whether the signal delay generated by the non-compliant device is reduced. If it is reduced, continue the adjustment until the signal delay no longer decreases. If it is not reduced, adjust the operating frequency downward and identify whether the signal delay generated by this device is reduced. If it is reduced, continue the adjustment until the signal delay no longer decreases. If it is not reduced, directly generate an error signal for display. Based on such error signals, the relevant external operators can promptly take relevant countermeasures and decide whether it is necessary to perform relevant maintenance on such non-compliant devices;

[0061] Specifically, during the actual operation analysis and processing, generally based on the corresponding delay performance, to evaluate whether its adjustment method is compliant. When adjusting upward, if the signal delay does not decrease, then adjust downward to determine whether the signal delay will decrease. Based on the relevant analysis and processing results, the non-compliant device can be made to reach the relevant compliant state. If it is always impossible to adjust to this state, it means that there are relevant problems with such devices, and relevant error signals need to be generated for relevant display, and relevant external personnel can intervene and promptly take countermeasures.

[0062] Embodiment 3

[0063] In the specific implementation process of this embodiment, it includes all the implementation processes of the above two groups of embodiments.

[0064] Some of the data in the above formula are numerically calculated after removing their dimensions, and the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0065] The above embodiments are only used to illustrate the technical method of the present invention and not to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical method of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical method of the present invention.

Claims

1. An integrated emergency communication system for cable tunnels, characterized in that, It includes a test layer and a monitoring layer. The test end conducts communication tests on the communication device to select the best working frequency range. The monitoring layer monitors the communication device and determines whether frequency adjustment is required based on the monitoring results. The test layer includes: The preliminary test end conducts test processing on the communication device and, based on the relevant signal receiver, identifies the different signal time delays generated by this communication device under different operating frequency states. The test data analysis end confirms the signal time delay change curve according to the signal time delays corresponding to the real-time changing operating frequencies, and then selects the standard line segment from the signal time delay change curve based on the preset standard time delay parameters. The specific method is as follows: Based on the different signal time delays corresponding to different operating frequencies, relevant coordinate points are determined in the two-dimensional coordinate system. The horizontal axis of the coordinate system is the operating frequency, and the vertical axis of the coordinate system is the signal time delay. Based on the determined several coordinate points, the signal time delay change curve in this test stage is confirmed. Based on the preset standard time delay parameters, relevant numerical points are found on the vertical axis of the two-dimensional coordinate system, and a group of relevant lines are constructed. The relevant lines are perpendicular to the vertical axis. The part of the line segment in the signal time delay change curve below this relevant line is marked as the standard line segment, and the marked standard line segment is transmitted into the best frequency selection end. The best frequency selection end sequentially determines the fluctuation points existing inside from the marked standard line segments, and then, based on the numerical performance of the signal time delays between the fluctuation points, identifies whether the line segments between the fluctuation points belong to the same frequency line segments. Then, the best line segment is selected from several groups of the same frequency line segments, and the operating frequency associated with this best line segment is marked as the best frequency and the best frequency range is determined. The specific method is as follows: Identify the change parameters of the adjacent points inside the standard line segment. The change parameter = the signal time delay of the latter point - the signal time delay of the former point. When the positive and negative states of the change parameters generated by a certain point and its front and rear points are opposite, this point is marked as a fluctuation point, and several fluctuation points existing inside the standard line segment are determined one by one. Both the initial point and the end point within the standard line segment are calibrated as fluctuation points, and the signal time delay corresponding to the successively appearing fluctuation points is calibrated as XH i , where i = 1, 2,..., n. When i is 1, it represents the first group of fluctuation points; when i is n, it represents the last group of fluctuation points; Identify the difference in signal time delays between adjacent fluctuation points: Starting from the first group of fluctuation points and the second group of fluctuation points, confirm the difference C1 in the signal time delays of the first group: If |C1| ≤ Y1, where Y1 is a preset value, the line segment between the first group of fluctuation points and the second group of fluctuation points is marked as the same frequency line segment. Then, identify the difference C2 between the second group of fluctuation points and the third group of fluctuation points. If |C2| ≤ Y1, the line segment between the first group of fluctuation points and the third group of fluctuation points is marked as the same frequency line segment. If |C2| > Y1, starting from the third group of fluctuation points, continue to confirm the difference backward to identify the second group of the same frequency line segments. If |C1| > Y1, starting from the second group of fluctuation points, confirm the difference C2 in the signal time delays between the second group of fluctuation points and the third group of fluctuation points, and identify the verification situation of the absolute value of C2 and Y1, and identify and mark one by one the subsequent same frequency line segments that appear. From a number of calibrated co-frequency line segments, confirm the operating frequency corresponding to the initial point of the corresponding co-frequency line segment and the operating frequency corresponding to the end point, identify the frequency difference, and the frequency difference = end point operating frequency - initial point operating frequency. From the frequency differences corresponding to different co-frequency line segments, select the maximum value, and calibrate the co-frequency line segment corresponding to this maximum value as the best line segment, and calibrate all the operating frequencies associated with the best line segment as the best frequencies, and determine the best frequency range, and transmit the determined best frequency range to the monitoring layer; The monitoring layer includes: a period monitoring terminal, a compliance determination terminal, and an associated adjustment terminal, and the period monitoring terminal, the compliance determination terminal, and the associated adjustment terminal are electrically connected in sequence from the output node to the input node. Among them, the compliance determination terminal, based on the relevant signal delay during the period monitoring and the preset standard delay parameter, identifies the duration ratio of the standard delay in the entire period monitoring process, and based on the determined specific ratio result, determines whether this communication device is operating in compliance. Among them, the specific determination method is: based on the relevant signal delays corresponding to different moments during the period monitoring, calibrate the relevant signal delays not higher than the standard delay parameter as the standard delay; based on the determined standard delay, determine its continuous duration within the entire period, and then determine its duration ratio, and the duration ratio = continuous duration ÷ total period duration; compare the duration ratio with the preset value Y2. When the duration ratio ≥ Y2, calibrate this communication device as a compliant device, otherwise, calibrate this communication device as a non-compliant device.

2. The integrated emergency communication system for cable tunnels according to claim 1, wherein, In the initial test terminal, the operating frequency gradually changes from small to large, and both the minimum value and the maximum value of the changed operating frequency are preset values, and its signal delay is the time difference between the signal generation moment and the reception moment.

3. The integrated emergency communication system for cable tunnels according to claim 1, characterized in that, The period monitoring terminal selects a set of best frequencies from the best frequency range as the operating frequency of this communication device, keeps the communication device in a signal transmission state all the time, and conducts period monitoring, and transmits the relevant signal delays of the period monitoring to the compliance determination terminal. Among them, the specific period of the period monitoring is a preset period; The associated adjustment terminal adjusts the operating frequency of such devices based on the calibrated non-compliant devices, and based on the performance of the corresponding signal delay after the operating frequency is adjusted, makes the operating state of this device reach the best state.

4. A comprehensive emergency communication system for cable tunnels according to claim 1, characterized in that, The specific method for the associated adjustment terminal to adjust the operating frequency is: Based on the determined best frequency range, adjust the operating frequency of this non-compliant device upwards, and the adjustment range does not exceed this best frequency range, and identify whether the signal delay generated by the non-compliant device is reduced: If it is reduced, continue to adjust until the signal delay does not decrease; If it is not reduced, adjust the operating frequency downwards, identify whether the signal delay generated by this device is reduced. If it is reduced, continue to adjust until the signal delay does not decrease. If it is not reduced, directly generate an error signal for display.

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