A monitoring and alarm system for underground communication and positioning device

Abstract

It relates to the field of underground early warning technology, and in particular to a monitoring and alarm system of an underground communication positioning device, including a positioning unit, a communication unit, a display unit, a monitoring unit, an analysis unit, an early warning unit and a storage unit. The positioning unit accurately locates underground workers; the display unit displays the nature and area of ​​the early warning; the monitoring unit performs image acquisition and face recognition on the workers, and determines the identity information and the area where the workers are located monitored by the camera; the analysis unit determines whether the workers carry positioning cards, whether the workers meet the access conditions of the area, draws the movement trajectory of the workers according to the positioning information of the positioning card, calculates the deviation between the current movement trajectory and the historical movement trajectory; determines the signal strength and volatility of the positioning signal; the early warning unit performs voice broadcast and sends out an early warning signal. The present invention detects the safety behavior of underground workers and sends out an early warning signal.

Description

Technical Field

[0001] The present invention relates to the technical field of underground early warning, and in particular to a monitoring and alarm system for an underground communication and positioning device. Background Art

[0002] Due to the complexity of mine tunnels, the high mobility of underground workers, and the ever-changing number of underground workers, positioning, communication systems and video surveillance systems are used to monitor the activities of mine workers in real time and understand the safety situation underground. Among them, underground communication positioning provides a modern guarantee for the scientific management of coal mines. All coal mines are actively developing and using related facilities to achieve comprehensive intelligent and real-time management and control.

[0003] Chinese Patent Publication No.: CN110067598A discloses a mine disaster alarm method based on personnel positioning. By suppressing the non-line-of-sight error algorithm, the target positioning accuracy is improved. At the same time, according to the characteristics that the behavior of the on-site personnel will change abnormally when an underground disaster occurs, the positioning data of the underground personnel monitored in real time by the mine positioning system will also be abnormal. Combined with the abnormal behavior changes of the personnel at the disaster site, by analyzing the movement rate and acceleration data of the underground personnel, and analyzing the relevant data of all on-site personnel in the relevant area, when the monitored abnormal behavior data meets the set conditions, a disaster alarm signal is issued; it can be seen that the mine disaster alarm method based on personnel positioning has the following problems:

[0004] Disaster alarms are only issued based on abnormal changes in the positions of personnel underground, without early warning of personnel safety behavior. Summary of the invention

[0005] To this end, the present invention provides a monitoring and alarm system for an underground communication and positioning device, so as to overcome the problem in the prior art that disaster alarms are only performed based on abnormal changes in the positions of underground personnel, but no early warning is given for the safety behaviors of the personnel.

[0006] To achieve the above object, the present invention provides a monitoring and alarm system for an underground communication and positioning device, comprising:

[0007] The positioning unit, including the host, positioning substation, positioning card, card reader, network switch and power box, is used to accurately locate the underground workers;

[0008] Communication unit, used to achieve stable connection between the monitoring alarm system and the cloud platform, facilitating remote monitoring and management;

[0009] A display unit, including a display and a control console, for displaying the nature and area of ​​the warning during the underground operation, wherein the control console can adjust the images captured by different cameras in the monitoring unit displayed on the display;

[0010] The monitoring unit includes a camera and a face recognition module, which is used to collect images and perform face recognition on underground workers, determine the identity information and location of the workers monitored by the camera, and transmit the data to the analysis unit;

[0011] The analysis unit is used to determine whether the staff member carries a positioning card, including whether the staff member does not carry a positioning card or carries a positioning card other than his / her own, or whether one person carries multiple positioning cards; determine whether the staff member meets the access conditions of the area, draw the movement trajectory of the staff member according to the positioning information of the positioning card in the positioning unit, calculate the deviation between the current movement trajectory and the historical movement trajectory; determine the signal strength of the positioning signal and the volatility of the positioning signal;

[0012] An early warning unit, including a buzzer, an indicator light and a speaker, is used to receive the signal transmitted by the analysis unit, make a voice broadcast according to the signal and send out an early warning signal;

[0013] The storage unit is used to store the identity information data of the underground workers, wherein the identity information data includes the work number, name, age, gender, facial features and authority level of the underground workers, and automatic attendance punching can be performed based on the work number and name.

[0014] Furthermore, the network switch is used to realize two-way communication between the host and the positioning substation;

[0015] The host is used to calculate the distance measurement value between the positioning card and the adjacent positioning substation according to the received signal strength and signal arrival time of the positioning information output by the positioning substation, and to perform real-time positioning of the positioning card according to the distance measurement value between the positioning card and the adjacent positioning substation;

[0016] The positioning substation stores its own location information and identification information, can detect the wireless positioning signal sent by the positioning card, and generate and output positioning information including the identity information of the underground worker corresponding to the positioning card;

[0017] The positioning card is carried by the underground staff and serves as the target node for positioning by the positioning unit. The wireless positioning signal sent by the positioning card is assigned with an identification code, and the identification code corresponds to the personal information data of the underground staff.

[0018] Furthermore, the monitoring unit performs image acquisition and face recognition on the underground worker, compares the extracted face features with the face features stored in the storage unit, and determines the identity information of the worker according to the result of the feature comparison;

[0019] The analysis unit extracts the underground area and area block confirmed by the positioning card of the worker in the positioning unit according to the identity information of the worker, and compares the area block where the camera of the worker is located in the monitoring unit with the area block where the positioning card is located.

[0020] If the area block where the camera is located is equal to the area block where the positioning card is located, the analysis unit determines that the staff member is carrying his / her own positioning card and determines whether the staff member meets the access conditions for entering the area;

[0021] If the area block where the camera is located is not equal to the area block where the positioning card is located, the analysis unit determines that the staff member does not carry his / her own positioning card, and determines the specific situation of the staff member carrying the positioning card.

[0022] Furthermore, if the positioning unit cannot receive the signal of the positioning card belonging to the worker, the analysis unit determines that the worker does not carry a positioning card and sends a signal to the display unit to display the identity information of the worker and the type that does not meet the underground regulations.

[0023] Furthermore, if the monitoring unit does not detect the facial information of another person in the area block where the camera is located, and the area block where the camera is located is equal to the area block where any positioning card is located, the analysis unit determines that the staff member carries another person's positioning card, and sends a signal to the display unit to display the identity information of the staff member and the positioning card and the type that does not meet the underground specifications;

[0024] Among them, if the monitoring unit does not detect other people's facial information in the area block where the camera is located, and the area block where the camera is located is equal to the area block where several positioning cards are located, the analysis unit determines that the staff member carries multiple positioning cards, and sends a signal to the display unit to display the identity information of the staff member and several positioning cards and the type that does not comply with underground regulations.

[0025] Furthermore, the analysis unit compares the authority level of the staff member confirmed by the positioning card with the access level of the area where the staff member is located determined by the positioning unit.

[0026] If the staff member's authority level is greater than or equal to the access level of the area, the analysis unit determines that the staff member meets the access conditions for entering the area;

[0027] If the staff member's authority level is lower than the access level of the area, the analysis unit determines that the staff member does not meet the access conditions for entering the area, sends a signal to the display unit to display the staff member's identity information and the area that does not meet the access conditions, and sends a signal to the early warning unit to issue an alarm message.

[0028] Furthermore, the analysis unit draws the movement trajectory of the staff member according to the positioning information of the positioning card in the positioning unit, calculates the deviation between the current movement trajectory and the historical movement trajectory,

[0029] If the deviation between the current motion trajectory and the historical motion trajectory is greater than the maximum deviation, and the current motion trajectory of the staff member deviates towards the dangerous route, the analysis unit determines that the staff member is at risk of going to the dangerous area and sends a signal to the early warning unit to issue an alarm message.

[0030] Furthermore, the positioning unit transmits the signal strength of the signal sent by the positioning card to the analysis unit, and the analysis unit compares the signal strength of the positioning signal with the preset standard strength of the positioning signal.

[0031] If the signal strength of the positioning signal is greater than or equal to the standard strength of the positioning signal, the analysis unit determines that the signal strength of the positioning signal is within a normal range;

[0032] If the signal strength of the positioning signal is less than the standard strength of the positioning signal, the analysis unit determines that the signal strength of the positioning signal is weak, calculates the duration of the weak signal strength of the positioning signal per unit time, and determines the signal fluctuation degree of the positioning signal.

[0033] Further, if the ratio of the duration of the weak signal strength of the positioning signal per unit time to the unit time is greater than a preset fluctuation threshold, the analysis unit determines that the volatility of the positioning signal is large;

[0034] The fluctuation threshold is the ratio of the duration of weak signal strength per unit time to the unit time when the signal error of the positioning signal is at the maximum under the standard strength;

[0035] The analysis unit calculates the shortest distance between any risk area and any safety area according to the range of the risk area and the safety area, and divides the risk area into risk levels according to the accident risk of the risk area, wherein the risk level of the risk area is greater than the risk level of the special operation area, which is greater than the risk level of the restricted area;

[0036] The fluctuation threshold of the risk area is positively correlated with the closest distance between the risk area and the safe area, and negatively correlated with the danger level of the risk area and the deviation between the current motion trajectory and the historical motion trajectory of the staff carrying the positioning card.

[0037] Furthermore, when the volatility of the positioning signal is large, the analysis unit reduces the calibration period for calibrating the accuracy of the positioning signal, and the reduction in the calibration period is positively correlated with the ratio of the duration of the weak signal strength of the positioning signal to the unit time.

[0038] Compared with the prior art, the beneficial effect of the present invention is that if underground workers do not carry positioning cards or carry positioning cards that are not their own and multiple positioning cards, a series of adverse effects on safety management and emergency response will be produced. The present invention confirms the identity information of the workers by performing facial recognition on the workers, accurately locates the positioning cards and determines the area block where the positioning cards are located, and determines the specific situation of the workers carrying positioning cards based on the area block where the cameras of the workers are located and the area block where the positioning cards to which the workers belong are located, thereby improving the safety of underground operations and the level of underground safety management, enhancing the ability to monitor underground operations, and improving management efficiency and reducing management costs by simplifying the management process.

[0039] Furthermore, the current movement trajectory and historical movement trajectory of the staff are analyzed. If the staff is deviating from the normal working route or entering an unauthorized area, it may be a sign of heading to a dangerous area. The deviation of the staff from the dangerous route will be used to alarm the approaching dangerous area, further improving the safety of underground operations. By timely discovering potential dangerous factors, the staff is reminded to take corresponding safety measures, thereby reducing the occurrence of accidents and preventing the staff from mistakenly entering dangerous areas or unauthorized areas.

[0040] Furthermore, the strength of the underground positioning signal plays an extremely important role in mine safety management and operations. If the signal strength underground is not detected, it will have an adverse impact on the prevention of personnel safety accidents and emergency responses. The present invention sets fluctuation thresholds of different sizes according to the degree of danger of the area where the positioning signal is located and the distance from the safe area, and calculates the proportion of the duration of weak signal strength of the positioning signal per unit time and the size of the fluctuation threshold to judge the volatility of the positioning signal. By monitoring the fluctuation of the positioning signal, potential communication interruption or signal interference is predicted, and measures are taken in time to avoid the occurrence of safety accidents, thereby improving the accuracy of detection, early warning and communication for underground operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a unit connection diagram of the monitoring and alarm system of the underground communication and positioning device in an embodiment of the present invention;

[0042] Figure 2 It is a logic block diagram of the monitoring and alarm system of the underground communication and positioning device in the embodiment of the present invention;

[0043] Figure 3 A schematic diagram of a process for determining whether a staff member carries a positioning card in an embodiment of the present invention;

[0044] Figure 4 A schematic diagram of a process for determining whether a staff member meets the regional access conditions in an embodiment of the present invention;

[0045] In the figure: 1-host, 2-positioning substation, 3-network switch, 4-positioning card, 5-display. DETAILED DESCRIPTION

[0046] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0047] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0048] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0049] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] See also Figure 1-Figure 4 As shown, Figure 1 This is a unit connection diagram of the monitoring and alarm system of the underground communication and positioning device in an embodiment of the present invention; Figure 2 It is a logic block diagram of the monitoring and alarm system of the underground communication and positioning device in the embodiment of the present invention; Figure 3 A schematic diagram of a process for determining whether a staff member carries a positioning card in an embodiment of the present invention; Figure 4 The figure is a flow chart of determining whether a staff member meets the regional access conditions in an embodiment of the present invention.

[0051] The present invention provides a monitoring and alarm system for an underground communication positioning device, comprising:

[0052] The positioning unit includes a host 1, a positioning substation 2, a positioning card 4, a card reader, a network switch 3 and a power supply box, and is used to accurately position underground workers;

[0053] The network switch 3 is used to realize two-way communication between the host 1 and the positioning substation 2;

[0054] The host 1 is used to calculate the distance measurement value between the positioning card 4 and the adjacent positioning substation 2 according to the received signal strength and signal arrival time of the positioning information output by the positioning substation 2, and to perform real-time positioning of the positioning card 4 according to the distance measurement value between the positioning card 4 and the adjacent positioning substation 2;

[0055] The positioning substation 2 stores its own position information and identification information, can detect the wireless positioning signal sent by the positioning card 4, and generate and output positioning information including the identity information of the underground worker corresponding to the positioning card 4;

[0056] The positioning card 4 is carried by the underground worker and serves as the target node for positioning by the positioning unit. The wireless positioning signal sent by the positioning card 4 is assigned with an identification code, which corresponds to the personal information data of the underground worker.

[0057] The communication unit supports multiple communication protocols, such as NB-IoT, LoRa, 4G, etc., which is used to achieve a stable connection between the monitoring alarm system and the cloud platform, facilitating remote monitoring and management;

[0058] A display unit, including a display 5 and a control console, for displaying the nature and area of ​​the warning during the underground work process, wherein the control console can adjust the images captured by different cameras in the monitoring unit displayed on the display 5;

[0059] The monitoring unit includes a camera and a face recognition module, which is used to collect images and perform face recognition on underground workers, determine the identity information and location of the workers monitored by the camera, and transmit the data to the analysis unit;

[0060] The analysis unit is used to determine whether the staff member carries a positioning card 4, including whether the staff member does not carry a positioning card or carries a positioning card other than his / her own, or whether one person carries multiple positioning cards; determine whether the staff member meets the access conditions of the area, draw the movement trajectory of the staff member according to the positioning information of the positioning card 4 in the positioning unit, and calculate the deviation between the current movement trajectory and the historical movement trajectory; determine the signal strength of the positioning signal and the volatility of the positioning signal;

[0061] An early warning unit, including a buzzer, an indicator light and a speaker, is used to receive the signal transmitted by the analysis unit, make a voice broadcast according to the signal and send out an early warning signal;

[0062] The storage unit is used to store the identity information data of the underground workers, wherein the identity information data includes the work number, name, age, gender, facial features and authority level of the underground workers, and automatic attendance punching can be performed based on the work number and name.

[0063] In this embodiment, according to the dangerousness of the underground area, the underground special operation area, restricted area and dangerous area are divided into risk areas, the living area and access area are divided into safe areas, the routes around the dangerous area are divided into dangerous routes, and the underground area is set with corresponding access levels.

[0064] Areas of the same type are divided into several blocks according to the cameras in the monitoring units. For example, the underground restricted area is divided into restricted A1 area, restricted A2 area, ... restricted An area, and the access area is divided into access B1 area, access B2 area, ... access Bn area.

[0065] The positioning unit detects the position of the personnel in real time through the positioning card 4 carried by the underground personnel to locate the personnel; and based on the image information collected by the underground camera in the monitoring unit, the relative position and angle are determined through the triangulation positioning principle of the image, so as to accurately locate the on-site staff displayed on the display unit.

[0066] The positioning unit can determine the area and area block where the staff is located based on the precise positioning of the staff.

[0067] The monitoring unit can collect facial images of underground workers based on the camera and preprocess the collected facial images, the preprocessing including image normalization, grayscale, and denoising. The position and size of the face are framed out in the preprocessed image through Haar features, HOG features, and deep learning. Facial features are extracted from the detected face through LBP (local binary pattern), PCA (principal component analysis), and SIFT (scale-invariant feature transform) feature extraction methods. The extracted facial features are compared with the facial features stored in the storage unit, and the identity information of the worker is determined based on the result of the feature comparison.

[0068] The identity information includes the name and authority level of the staff member, and the monitoring unit is provided with the underground area and area block where the camera is arranged.

[0069] After the analysis unit receives the identity information of the staff member detected by the monitoring unit, it extracts the underground area and area block confirmed by the positioning card 4 to which the staff member belongs in the positioning unit according to the identity information of the staff member, and compares the area block where the camera in the monitoring unit is located with the area block where the positioning card 4 is located.

[0070] If the area block where the camera is located is equal to the area block where the positioning card 4 is located, the analysis unit determines that the staff member carries his / her own positioning card 4 and determines whether the staff member meets the access conditions for entering the area;

[0071] If the area block where the camera is located is not equal to the area block where the positioning card 4 is located, the analysis unit determines that the staff member does not carry his / her own positioning card 4, and determines the specific situation of the staff member carrying the positioning card 4.

[0072] If the positioning unit fails to receive the signal from the positioning card 4 of the worker, the analysis unit determines that the worker does not carry the positioning card 4, and sends a signal to the display unit to display the identity information of the worker and the type that does not meet the underground regulations;

[0073] If the monitoring unit does not detect the facial information of other people in the area block where the camera is located, and the area block where the camera is located is equal to the area block where any positioning card 4 is located, the analysis unit determines that the staff member carries another person's positioning card 4, and sends a signal to the display unit to display the identity information of the staff member and the positioning card 4 and the type that does not meet the underground specifications;

[0074] Among them, if the monitoring unit does not detect other people's facial information in the area block where the camera is located, and the area block where the camera is located is equal to the area block where several positioning cards 4 are located, the analysis unit determines that the staff is carrying multiple positioning cards 4, and sends a signal to the display unit to display the identity information of the staff and several positioning cards 4 and the type that does not comply with the underground specifications.

[0075] Specifically, if underground workers do not carry positioning cards or carry positioning cards that are not their own or multiple positioning cards, a series of adverse effects will be produced on safety management and emergency response. The present invention confirms the identity information of the workers through facial recognition, accurately locates the positioning cards and determines the area block where the positioning cards are located. The specific situation of the workers carrying positioning cards is determined based on the area block where the cameras of the workers are located and the area block where the positioning cards of the workers are located, thereby improving the safety of underground operations and the level of underground safety management, enhancing the monitoring capability of underground operations, and improving management efficiency and reducing management costs by simplifying the management process.

[0076] The specific process of determining whether a staff member meets the access conditions to enter the area includes:

[0077] The analysis unit compares the authority level of the staff member confirmed by the positioning card 4 with the access level of the area where the staff member is located determined by the positioning unit.

[0078] If the staff member's authority level is greater than or equal to the access level of the area, the analysis unit determines that the staff member meets the access conditions for entering the area;

[0079] If the staff member's authority level is lower than the access level of the area, the analysis unit determines that the staff member does not meet the access conditions for entering the area, sends a signal to the display unit to display the staff member's identity information and the area that does not meet the access conditions, sends a signal to the early warning unit to issue an alarm message, controls the indicator light to flash, the buzzer to alarm, and issues a voice warning through a speaker installed underground.

[0080] The analysis unit draws the movement trajectory of the staff member according to the positioning information of the positioning card 4 in the positioning unit, calculates the deviation between the current movement trajectory and the historical movement trajectory,

[0081] If the deviation between the current motion trajectory and the historical motion trajectory is greater than the maximum deviation, and the staff's current motion trajectory deviates from the dangerous route, the analysis unit determines that the staff is at risk of going to the dangerous area, sends a signal to the early warning unit to issue an alarm message, controls the indicator light to flash, and sounds an alarm.

[0082] Specifically, the current movement trajectory and historical movement trajectory of the staff are analyzed. If the staff is deviating from the normal work route or entering an unauthorized area, it may be a sign of heading to a dangerous area. The staff’s deviation from the dangerous route will be used to alarm the approaching dangerous area, further improving the safety of underground operations. By timely discovering potential dangerous factors, the staff is reminded to take corresponding safety measures, thereby reducing the occurrence of accidents and preventing staff from mistakenly entering dangerous areas or unauthorized areas.

[0083] The positioning unit transmits the signal strength of the signal sent by the positioning card 4 to the analysis unit, and the analysis unit compares the signal strength of the positioning signal with the preset standard strength of the positioning signal.

[0084] If the signal strength of the positioning signal is greater than or equal to the standard strength of the positioning signal, the analysis unit determines that the signal strength of the positioning signal is within a normal range;

[0085] If the signal strength of the positioning signal is less than the standard strength of the positioning signal, the analysis unit determines that the signal strength of the positioning signal is weak, calculates the duration of the weak signal strength of the positioning signal per unit time, and determines the signal fluctuation degree of the positioning signal.

[0086] If the ratio of the duration of the weak signal strength of the positioning signal per unit time to the unit time is greater than the preset fluctuation threshold, the analysis unit determines that the volatility of the positioning signal is large, and reduces the calibration period for calibrating the accuracy of the positioning signal, and the reduction amount of the calibration period is positively correlated with the ratio of the duration of the weak signal strength of the positioning signal to the unit time;

[0087] The fluctuation threshold is the ratio of the duration of weak signal strength per unit time to the unit time when the signal error of the positioning signal is at the maximum under the standard strength;

[0088] In this embodiment, the analysis unit calculates the shortest distance between any risk area and any safety area according to the range of the risk area and the safety area;

[0089] The risk level of the risk area is divided according to the accident risk of the risk area, where the risk level of the risk area is greater than that of the special operation area, which is greater than that of the restricted area;

[0090] The fluctuation threshold of the risk area is negatively correlated with the shortest distance between the risk area and the safe area, the danger level of the risk area, and the product of the deviation between the current motion trajectory and the historical motion trajectory of the staff carrying the positioning card 4.

[0091] Specifically, the strength of underground positioning signals plays an extremely important role in mine safety management and operations. If the signal strength underground is not detected, it will have an adverse impact on the prevention of personnel safety accidents and emergency responses. The present invention sets fluctuation thresholds of different sizes according to the degree of danger of the area where the positioning signal is located and the distance from the safe area, and calculates the proportion of the duration of weak signal strength of the positioning signal per unit time and the size of the fluctuation threshold to judge the volatility of the positioning signal. By monitoring the fluctuation of the positioning signal, potential communication interruption or signal interference is predicted, and measures are taken in time to avoid the occurrence of safety accidents, thereby improving the accuracy of detection, early warning and communication for underground operations.

[0092] In this embodiment, when the card-carrying personnel pass through the positioning area at the maximum displacement speed and the maximum number of concurrent users, the miss / misread rate of the positioning substation is 10 -4 The static positioning error measured by the positioning unit is less than 0.3m, and the dynamic positioning error is less than 7.3m.

[0093] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0094] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A monitoring and alarm system for an underground communication and positioning device, characterized in that: include: Positioning unit, used to accurately locate underground workers; Communication unit, used to achieve stable connection between the monitoring alarm system and the cloud platform; A display unit, including a display and a control console, for displaying the nature and area of ​​the warning during the underground operation, wherein the control console can adjust the images captured by different cameras in the monitoring unit displayed on the display; The monitoring unit includes a camera and a face recognition module, which is used to collect images and perform face recognition on underground workers, determine the identity information and location of the workers monitored by the camera, and transmit the data to the analysis unit; The analysis unit is used to determine whether the staff member carries a positioning card, including whether the staff member does not carry a positioning card or carries a positioning card other than his / her own, or whether one person carries multiple positioning cards; determine whether the staff member meets the access conditions of the area, draw the movement trajectory of the staff member according to the positioning information of the positioning card in the positioning unit, calculate the deviation between the current movement trajectory and the historical movement trajectory; determine the signal strength of the positioning signal and the volatility of the positioning signal; The positioning unit transmits the signal strength of the signal sent by the positioning card to the analysis unit, and the analysis unit compares the signal strength with the preset standard strength of the positioning signal. If the signal strength is greater than or equal to the standard strength of the positioning signal, the analysis unit determines that the signal strength is within a normal range; If the signal strength is less than the standard strength of the positioning signal, the analysis unit determines that the signal strength is weak, calculates the duration of the weak signal strength per unit time, and determines the signal fluctuation degree of the positioning signal. If the ratio of the duration of the weak signal strength per unit time to the unit time is greater than a preset fluctuation threshold, the analysis unit determines that the fluctuation of the positioning signal is large; The fluctuation threshold is the ratio of the duration of weak signal strength per unit time to the unit time when the signal error is at the maximum under the standard strength; The analysis unit calculates the shortest distance between any risk area and any safety area according to the range of the risk area and the safety area, and divides the risk area into risk levels according to the accident risk of the risk area, wherein the risk level of the risk area is greater than the risk level of the special operation area, which is greater than the risk level of the restricted area; The fluctuation threshold of the risk area is positively correlated with the closest distance between the risk area and the safe area, and negatively correlated with the danger level of the risk area and the deviation between the current movement trajectory and the historical movement trajectory of the staff carrying the positioning card; An early warning unit, used to receive the signal transmitted by the analysis unit, make a voice broadcast according to the signal and send out an early warning signal; The storage unit is used to store the identity information data of the underground workers, wherein the identity information data includes the work number, name, age, gender, facial features and authority level of the underground workers, and automatic attendance punching can be performed based on the work number and name.

2. The monitoring and alarm system of the underground communication and positioning device according to claim 1 is characterized in that: The positioning unit includes a host, a positioning substation, a positioning card, a card reader, a network switch and a power box; The network switch is used to realize two-way communication between the host and the positioning substation; The host is used to calculate the distance measurement value between the positioning card and the adjacent positioning substation according to the received signal strength and signal arrival time of the positioning information output by the positioning substation, and to perform real-time positioning of the positioning card according to the distance measurement value between the positioning card and the adjacent positioning substation; The positioning substation stores its own location information and identification information, can detect the wireless positioning signal sent by the positioning card, and generate and output positioning information including the identity information of the underground worker corresponding to the positioning card; The positioning card is carried by the underground worker and serves as the target node for positioning by the positioning unit. The wireless positioning signal sent by the positioning card is assigned with an identification code, which corresponds to the personal information data of the underground worker. The early warning unit includes a buzzer, an indicator light and a speaker.

3. The monitoring and alarm system of the underground communication and positioning device according to claim 1 is characterized in that: The monitoring unit collects images and performs face recognition on underground workers, compares the extracted face features with the face features stored in the storage unit, and determines the identity information of the workers according to the result of the feature comparison; The analysis unit extracts the underground area and area block confirmed by the positioning card of the worker in the positioning unit according to the identity information of the worker, and compares the area block where the camera of the worker is located in the monitoring unit with the area block where the positioning card is located. If the area block where the camera is located is equal to the area block where the positioning card is located, the analysis unit determines that the staff member is carrying his / her own positioning card and determines whether the staff member meets the access conditions for entering the area; If the area block where the camera is located is not equal to the area block where the positioning card is located, the analysis unit determines that the staff member does not carry his / her own positioning card, and determines the specific situation of the staff member carrying the positioning card.

4. The monitoring and alarm system of the underground communication and positioning device according to claim 3 is characterized in that: If the positioning unit cannot receive the signal of the positioning card belonging to the worker, the analysis unit determines that the worker does not carry the positioning card, and sends a signal to the display unit to display the identity information of the worker and the type that does not meet the underground regulations.

5. The monitoring and alarm system of the underground communication and positioning device according to claim 3 is characterized in that: If the monitoring unit does not detect the facial information of other people in the area block where the camera is located, and the area block where the camera is located is equal to the area block where any positioning card is located, the analysis unit determines that the staff member carries another person's positioning card, and sends a signal to the display unit to display the identity information of the staff member and the positioning card and the type that does not meet the underground specifications; Among them, if the monitoring unit does not detect other people's facial information in the area block where the camera is located, and the area block where the camera is located is equal to the area block where several positioning cards are located, the analysis unit determines that the staff member carries multiple positioning cards, and sends a signal to the display unit to display the identity information of the staff member and several positioning cards and the type that does not comply with underground regulations.

6. The monitoring and alarm system of the underground communication and positioning device according to claim 1, characterized in that: The analysis unit compares the authority level of the staff member confirmed by the positioning card with the access level of the area where the staff member is located determined by the positioning unit. If the staff member's authority level is greater than or equal to the access level of the area, the analysis unit determines that the staff member meets the access conditions for entering the area; If the staff member's authority level is lower than the access level of the area, the analysis unit determines that the staff member does not meet the access conditions for entering the area, sends a signal to the display unit to display the staff member's identity information and the area that does not meet the access conditions, and sends a signal to the early warning unit to issue an alarm message.

7. The monitoring and alarm system of the underground communication and positioning device according to claim 1, characterized in that: The analysis unit draws the movement trajectory of the staff member according to the positioning information of the positioning card in the positioning unit, and calculates the deviation between the current movement trajectory and the historical movement trajectory. If the deviation between the current motion trajectory and the historical motion trajectory is greater than the maximum deviation, and the current motion trajectory of the staff member deviates towards a dangerous route, the analysis unit determines that the staff member is at risk of going to a dangerous area and sends a signal to the early warning unit to issue an alarm message.

8. The monitoring and alarm system of the underground communication and positioning device according to claim 1, characterized in that: When the volatility of the positioning signal is large, the analysis unit reduces the calibration period for calibrating the accuracy of the positioning signal, and the reduction amount of the calibration period is positively correlated with the ratio of the duration of weak signal strength to unit time.

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