Mining area personnel position management system

Abstract

A mining area personnel position management system relates to the technical field of mine monitoring and communication, and comprises positioning cards, positioning substations, a host and auxiliary equipment, each positioning card is correspondingly carried by one mining area personnel and is used for sending a unique position signal at regular time; the positioning substations are correspondingly distributed at key positions of a mining area and are used for receiving signals of the positioning cards; the host is used for receiving data of the positioning substation and positioning mining personnel by adopting a software algorithm based on ToA and RSS I; the auxiliary equipment comprises a network switch, a power box, an antenna, a cable, an optical cable, a junction box and a lightning arrester, and is used for connecting the positioning substation and the host and perfecting the signal receiving function of the positioning substation or the host; the positions of mining personnel can be accurately positioned.

Description

Technical Field

[0001] The present invention relates to the field of mine monitoring and communication technology, and in particular to a mining area personnel position management system. Background Art

[0002] With the current development of the mining industry, the production focus of mining areas has shifted more to safe production, and the difficulty of safe production lies in the location management of personnel in the mining area;

[0003] Due to the large area of ​​the mining area, complex terrain and deep mines, the mobile network cannot provide comprehensive coverage. Therefore, miners in the mining area cannot report their location to the main station in time. If a natural disaster causes the mine to collapse, or some equipment collapses due to a construction accident, trapping or injuring miners, or if miners faint due to illness, affecting their movements, all of these may cause harm to their health.

[0004] The current personnel location management system generally determines the location of personnel in the mining area by binding wireless transmitters to personnel in the mining area, and then receiving signals through the wireless receiver of the host. However, due to the large area of ​​the mining area, the wireless signal needs to go through multiple interferences to reach the wireless receiver, and the host needs to receive multiple wireless signals, which makes the host's positioning of personnel in the mining area very vague and unable to accurately locate, thereby increasing the difficulty and efficiency of subsequent searches for personnel in the mining area.

[0005] The Chinese patent with publication number CN103293513A discloses a personnel positioning system and positioning method for underground coal mines based on the complementarity of RSS and TOA. A directional antenna is used to determine the direction of personnel, and the RSS method is used to detect the distance information between the personnel positioning card reader and the identification card in the detection area where the RSS method has high accuracy but the TOA method may not be able to detect the situation. The TOA method with high accuracy is used in other areas to detect the distance information between the personnel positioning card reader and the identification card, and the positioning information including the identity information of the personnel in the underground coal mine is generated and output, so as to realize the accurate positioning of personnel in the underground coal mine and reduce the missed reading rate of the positioning system.

[0006] However, the positioning card and positioning card reader in this method still need to transmit signals over long distances, and even with the assistance of software algorithms, the positioning accuracy will still be affected. Summary of the invention

[0007] The purpose of the present invention is to provide a mining area personnel position management system, which can accurately locate the positions of mining area personnel.

[0008] The present invention is achieved through the following technical solutions:

[0009] A mine personnel location management system, including a positioning card, a positioning substation, a host and auxiliary equipment.

[0010] Each positioning card is carried by a corresponding mining personnel and is used to send a unique location signal at regular intervals;

[0011] The positioning substations are distributed at key locations in the mining area and are used to receive signals from positioning cards;

[0012] The host is used to receive data from the positioning substation and locate personnel in the mining area using a software algorithm based on ToA and RSSI;

[0013] The auxiliary equipment includes a network switch, a power box, an antenna, an electric cable, an optical cable, a junction box and a lightning arrester, which are used to locate the connection between the substation and the host, and to improve the signal receiving function of the substation or the host.

[0014] Furthermore, the distribution areas of the positioning substations are wellheads, tunnels, mining working faces and refuge caverns, and the interval between two adjacent positioning substations in a tunnel is 30-50m, and the number of positioning substations in a mining working face is 2-3.

[0015] Furthermore, the specific positioning steps of the software algorithm based on ToA and RSSI include:

[0016] S1. Data preprocessing;

[0017] S2. Use RSSI method to preliminarily locate the personnel in the mining area and obtain a preliminary location estimate;

[0018] S3. Based on the preliminary position, use the ToA method to perform precise positioning;

[0019] S4. Perform anomaly detection on precise location;

[0020] S5. If the abnormal detection result is abnormal, it is necessary to correct the precise position or directly issue an alarm;

[0021] S6. If the abnormality detection result is normal, the precise position is output.

[0022] Furthermore, the specific calculation formula of the RSS I method is:

[0023] P r (d) = P t +G t +G r -20log 10 (d)-20log 10 (f)-32.44

[0024] Among them, P r(d) is the received signal strength at distance d, P t is the transmit power, G t and G r are the transmitting and receiving antenna gains, d is the distance, and f is the signal frequency;

[0025] Based on the distance d, the preliminary position (x0, y0, z0) is calculated using the least squares method or trilateration.

[0026] Furthermore, the specific calculation formula of the ToA method is:

[0027] Calculate the distance d from the positioning card to each substation i :

[0028] d i =c(t i -t0)

[0029] Where c is the speed of light, t i is the time when the signal arrives at the i-th positioning substation, and t0 is the sending time;

[0030] The position coordinates (x, y, z) of the positioning card are:

[0031]

[0032] Where (x i ,y i ,z i ) is the coordinate of the ith positioning substation, and the initial position (x0, y0, z0) is the initial value calculated by the formula.

[0033] Furthermore, the anomaly detection process includes:

[0034] S41. Detect the sudden change of RSS I value to determine whether there is signal interference or equipment failure;

[0035] S42. Detection position mutations to determine whether there is a multipath effect or other interference.

[0036] Furthermore, the correction process of step S5 includes:

[0037] S51. For RSSI value mutation, position correction is used to eliminate the abnormality;

[0038] S52. For sudden changes in the detection position, an alarm is directly issued.

[0039] Furthermore, the management system also includes a portable locator for independently measuring each locator card when off-grid and displaying the position of the locator card.

[0040] Furthermore, the positioning card has the function of receiving emergency evacuation commands, sound, light and vibration alarms.

[0041] Furthermore, the host has the function of issuing an emergency alarm when the positioning card remains stationary for a long time.

[0042] The technical solution of the present invention has at least the following advantages and beneficial effects:

[0043] The present invention discloses a mine personnel location management system, which uses a one-to-one binding between a positioning card and a mine personnel, so that the location signals received by the subsequent positioning substation and the host are all unique signals, thereby facilitating the independent positioning of each mine personnel position and improving the accuracy of the positioning of the mine personnel;

[0044] As a signal relay point, the positioning substation has a certain signal receiving range, and the received positioning card signal is subject to low interference, which ensures the quality of the signal transmitted to the host, allowing the host to make accurate judgments on the location of mining personnel based on high-quality signals. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 The figure is a schematic diagram of a system structure of the present invention.

[0046] Figure numerals: 1. positioning card; 2. positioning substation; 3. host; 4. auxiliary equipment. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0048] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0050] In the description of the present invention, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when used. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0051] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] Example 1

[0053] As attached Figure 1 The mine personnel location management system shown in the figure includes a positioning card 1, a positioning substation 2, a host 3 and auxiliary equipment 4.

[0054] Each positioning card 1 is carried by a corresponding mining personnel and is used to send a unique location signal at regular intervals;

[0055] That is, each positioning card 1 sends the location information of a mining personnel, so that the location signals received by the subsequent positioning substation 2 and the host 3 are unique signals, thereby facilitating the independent positioning of each mining personnel and improving the accuracy of the positioning of mining personnel;

[0056] The positioning substation 2 is distributed at key locations in the mining area and is used to receive signals from the positioning card 1;

[0057] Each positioning substation 2 has a certain signal receiving range. After receiving the location information sent by a positioning card 1, the positioning substation 2 will directly send the location information to the host 3;

[0058] The host 3 is used to receive data from the positioning substation 2 and locate personnel in the mining area using a software algorithm based on ToA and RSS I;

[0059] The host 3 stores the position coordinates of each positioning substation 2 in advance, so that after receiving the positioning card 1 data sent by the positioning substation 2, the distance and direction information between the positioning card 1 and the corresponding positioning substation 2 are calculated, and the positioning card 1, that is, the specific position coordinates of the mining personnel can be obtained;

[0060] It should be noted that in a mining area, generally multiple positioning substations 2 receive the signal of the same positioning card 1 at the same time. In this case, the host 3 can obtain accurate positioning results by analyzing the distance between the positioning card 1 signal and each positioning substation 2, and then performing comprehensive calculations.

[0061] The auxiliary equipment 4 includes a network switch, a power supply box, an antenna, an electric cable, an optical cable, a junction box and a lightning arrester, and is used to locate the connection between the substation 2 and the host 3, and to improve the signal receiving function of the substation 2 or the host 3;

[0062] The network switch is used to complete the network connection between multiple positioning substations 2 and the host 3;

[0063] The power supply box is used to supply power to the positioning substation 2, and each positioning substation 2 is provided with a power supply box;

[0064] The antenna is a device used by the positioning substation 2 to receive the signal from the positioning card 1. Since the positioning card 1 generally transmits wireless signals, the antenna is needed to enhance the ability of the positioning substation 2 to receive wireless signals.

[0065] The electrical and optical cables are used to locate the network connection between the substation 2 and the host 3;

[0066] The junction box is used to organize the various wires connected to the host 3;

[0067] The lightning arrester is used to improve the lightning protection capability of the positioning substation 2. Because for mining areas in mountainous areas, some positioning substations 2 may need to be installed at higher positions, making them vulnerable to lightning strikes. The lightning arrester can increase the service life of the positioning substation 2 and reduce the damage rate.

[0068] In addition, the distribution area of ​​the positioning substation 2 is the wellhead, tunnel, mining working face and refuge cavern, and the interval between two adjacent positioning substations 2 in the tunnel is 30-50m, and the number of positioning substations 2 in the mining working face is 2-3;

[0069] The positioning substation 2 should cover all key areas of the entire mining area to ensure that there are no blind spots. It should be noted that the positioning substation 2 is set at a high point in each area to improve the anti-interference ability of the positioning substation 2;

[0070] In addition, additional positioning substations 2 should be set up at key locations such as intersections and branch points of the tunnel to ensure the positioning accuracy of personnel at these locations; in areas with severe multipath effects (such as curved tunnels, a large number of metal equipment, etc.), the density of positioning substations 2 should be appropriately increased so that the subsequent host 3 can have more reference information when performing positioning, thereby reducing positioning errors.

[0071] In addition, the management system also includes a portable locator for independently measuring each locating card 1 when off-grid and displaying the position of the locating card 1 .

[0072] According to needs, the positioning card 1 has the functions of receiving emergency evacuation orders, sound, light and vibration alarms.

[0073] In addition, the host 3 has the function of issuing an emergency alarm when the positioning card 1 remains stationary for a long time.

[0074] It should be noted that the system can also have:

[0075] 1. Monitoring

[0076] (1) The system should be able to monitor the location and time of card holders.

[0077] (2) The system should have monitoring functions such as the time when card holders enter / enter the well, the time when they enter / enter key areas, the time when they enter / enter restricted areas, and the time when they enter / enter permitted areas.

[0078] (3) The system should have monitoring functions such as the start / end time of cardholders crossing the layer boundary and the start / end time of approaching dangerous areas.

[0079] (4) The system should be able to monitor the location of card-carrying passengers on various modes of transportation, such as overhead travelling vehicles and electric locomotives.

[0080] (5) The system should be able to identify multiple positioning cards 1 that enter the positioning area at the same time.

[0081] (6) The system should have the function of detecting whether the positioning card 1 is working properly and whether each person going down the mine carries a unique positioning card 1.

[0082] (7) The system should have the function of offline positioning using a portable locator. The portable locator should have the functions of independently measuring and displaying the distance to the locating card 1, searching for people in distress, and displaying the battery level.

[0083] (8) Positioning card 1 should have the function of sending accident alarm information to positioning substation 2.

[0084] (9) Positioning card 1 should have the functions of receiving emergency evacuation orders, sound, light and vibration alarms, etc.; it should have information display function.

[0085] (10) The system should have the function of monitoring the moving speed of positioning card 1 and providing abnormal alarm.

[0086] (11) The system should have the function of alarming when positioning card 1 is stationary for a long time or has abnormal posture.

[0087] (12) Positioning card 1 should have a low battery indication alarm function.

[0088] (13) Positioning substation 2 should have the function of displaying the power supply status; it should have the function of uploading the power supply status.

[0089] 2. Management

[0090] (1) The system should have the functions of displaying, printing, and querying the total number of card-carrying personnel going down the mine, the time of entering / exiting the mine, and the working time down the mine, as well as the total number of overtime personnel and personnel, the total number of overloaded personnel, and personnel alarm, display, printing, and query.

[0091] (2) The system should have the functions of displaying, printing, and querying the total number of cardholders entering / entering key areas, the time of entry / exit, and working hours, and the total number of overtime personnel, the total number of overloaded personnel, and personnel alarm.

[0092] (3) The system should have the functions of displaying, printing, and querying the total number of cardholders entering / entering the access area, the number of cardholders, the time of entry / exit, and working hours, and the total number of persons illegally entering the access area and the alarm, display, printing, and querying.

[0093] (4) The system should have the functions of displaying, printing, querying, and alarming the total number of cardholders entering / entering restricted areas, the number of people, the time of entry / exit, and the length of stay in the restricted areas.

[0094] (5) The system should have the functions of displaying, printing, querying and alarming the start / end time of cardholders crossing the layer boundary, the start / end time of approaching the dangerous area, the detention time, the total number of people and the number of people.

[0095] (6) The system should have the functions of displaying, printing, and querying the time of special operation personnel entering / leaving the well, the time of entering / leaving the operation site, and the working time, and the total number of abnormal operation personnel and

[0096] Functions such as display, printing, query and alarm of personnel, entry / exit time and working hours.

[0097] (7) The system should have the functions of displaying, printing, and querying the time of entering and leaving the well, the time of entering and leaving key areas, and working hours for the shift leader.

[0098] (8) The system should have the functions of displaying, printing, querying and abnormal alarming the activity routes of card-carrying personnel going down the mine.

[0099] (9) The system should have the functions of displaying, printing and querying the cardholder’s card number, name, ID number, date of birth, blood type, telephone number, family contact number, work permit and validity period, position or type of work, team, main work location, number of times the person goes down the well each month, time of going down the well, and daily situation of going down the well.

[0100] (10) The system should have the functions of query, display, and printing by department, region, time, location substation 2, personnel, etc.

[0101] (11) The system should have attendance management function.

[0102] 3. Storage and Query

[0103] 1) The system should have storage function, and the storage content includes:

[0104] (1) Location and time of cardholder

[0105] (2) The time when the card holder enters / exits the well;

[0106] (3) The time when card holders enter or exit key areas;

[0107] (4) The time when card holders enter or exit restricted areas;

[0108] (5) The time when the card holder enters or leaves the access area;

[0109] (6) The time when the card holder enters / exits the work site;

[0110] (7) The start / end time of the cardholder’s entry / exit beyond the boundary;

[0111] (8) The time when the card holder starts and ends approaching the danger zone;

[0112] (9) Total number of excess passengers, start / end times and personnel;

[0113] (10) Total number of overtime personnel, start / end time and personnel;

[0114] (11) Total number of persons entering the restricted area, start / end time and persons;

[0115] (12) Total number of persons entering the access area, start / end time and persons;

[0116] (13) Total number of persons crossing the boundary, start / end time and persons;

[0117] (14) Total number of people in the vicinity of the danger zone, start / end time and personnel;

[0118] (15) Total number of personnel with abnormal work, start / end time and personnel;

[0119] (16) Card number, name, ID number, date of birth, blood type, telephone number, family contact number, work permit and validity period, position or type of work, team or group, main work location, etc.

[0120] 2) The system should have a query function. The query categories are as follows:

[0121] (1) Search by personnel and total number of personnel;

[0122] (2) Query by time;

[0123] (3) Search by region;

[0124] (4) Search by location substation 2;

[0125] (5) Query by timeout alarm;

[0126] (6) Query by overcrowding alarm;

[0127] (7) Query alarms by restricted area;

[0128] (8) Alarm query by access area;

[0129] (9) Query by super-layer crossing alarm;

[0130] (10) Query alarms by nearby dangerous areas;

[0131] (11) Query by abnormal working alarm;

[0132] (12) Search by personnel category;

[0133] (13) Search by department;

[0134] (14) Search by type of work, etc.

[0135] 3) The system should have the function of preventing the modification of real-time data, historical data and other stored contents (except parameter setting and page editing). The system should have the function of marking erroneous data, etc.

[0136] 4) The system should have data backup function.

[0137] 5) The positioning substation 2 should have a data storage function. When the system communication is interrupted, the substation stores the identification card number, location and time; when the system communication is normal, it is uploaded to the host 3.

[0138] 4. Display

[0139] 1) The system should have Chinese character display and prompt functions.

[0140] 2) The system should have a list display function. The display content includes:

[0141] (1) Total number of personnel and personnel going down the mine;

[0142] (2) total number of personnel and personnel in key areas;

[0143] (3) Total number and personnel of personnel who reported overtime;

[0144] (4) The total number and personnel of personnel who report overcrowding;

[0145] (5) The total number and number of personnel who should be on alert in the restricted area;

[0146] (6) The total number and number of personnel who have alerted the area;

[0147] (7) The total number and number of persons who have crossed the boundary beyond the floor;

[0148] (8) The total number of people and personnel in the vicinity of the danger zone;

[0149] (9) The total number of abnormal work alarms and personnel of special operations personnel, etc.

[0150] 3) The system should have the function of dynamic display of the shaft and tunnel system diagram. The display content includes: tunnel layout simulation diagram, total number of personnel going down the shaft, total number of personnel in key areas, personnel location and name, timeout alarm, overcrowding alarm, restricted area alarm, access area alarm, over-layer crossing alarm, near dangerous area alarm, abnormal work alarm for special operations personnel, personnel location trajectory playback, etc. It should have roaming, general map plus partial zoom, page display and other modes.

[0151] 4) The system should have the function of displaying the layout of the system equipment. The display content includes the equipment names, relative positions and operating status of the positioning substation 2, power boxes, switches, antennas and other equipment. If the system is too large to fit on one screen, roaming, paging or general diagram plus partial zooming can be used.

[0152] 5. Print

[0153] The system should have Chinese character reports and initialization parameter call printing function (timing printing function is optional). Printing content includes:

[0154] (1) Total number of personnel and personnel going down the mine;

[0155] (2) total number of personnel and personnel in key areas;

[0156] (3) Total number and personnel of personnel who reported overtime;

[0157] (4) The total number and personnel of personnel who report overcrowding;

[0158] (5) The total number and number of personnel who should be on alert in the restricted area;

[0159] (6) The total number and number of personnel who have alerted the area;

[0160] (7) The total number and number of persons who have crossed the boundary beyond the floor;

[0161] (8) The total number of people and personnel in the vicinity of the danger zone;

[0162] (9) The total number of abnormal work alarms of special operations personnel and the personnel involved;

[0163] (10) Statistics on the total number of leaders and cadres going down the mine each month and the time they spend there.

[0164] 6. Human-computer dialogue

[0165] (1) The system should have a human-computer dialogue function to facilitate system generation, parameter modification, function call, graphic editing, etc.

[0166] (2) The system should have an operation authority management function. Password operations must be used for parameter settings, and operation records must be kept.

[0167] (3) In any display mode, you can directly enter the selected list display, dynamic display of shaft and tunnel system diagram, system equipment layout diagram display, printing, parameter setting, page editing, query, etc.

[0168] 7. Self-diagnosis

[0169] The system should have self-diagnosis, fault alarm, display, query and printing functions. When the equipment such as the positioning substation 2 in the system fails, an alarm will be issued and the fault time and faulty equipment will be recorded.

[0170] 8. Dual machine switching

[0171] The system host 3 should have the function of automatic dual-machine switching. The system host 3 has dual-machine hot backup. When the working host 3 fails, the backup host 3 automatically starts working.

[0172] 9. Backup power supply

[0173] The system should have a backup power supply to ensure normal operation of the system when the power grid is out. The system should have the function of monitoring and alarming the remaining power of the backup power supply.

[0174] 10. Network communication

[0175] The system should have a network interface, comply with the requirements of MT / T1116, and upload relevant information to competent authorities at all levels.

[0176] 11.Transmission function

[0177] The information transmission performance of the system should comply with the relevant requirements of MT / T899, MT / T1116, MT / T1130, MT / T1131, etc. The system backbone network should adopt industrial Ethernet.

[0178] 12. Ability to adapt to power fluctuations

[0179] The power supply voltage shall be within the allowable voltage fluctuation range specified in the product standard; the system's maximum static positioning error, maximum dynamic positioning error, maximum displacement speed, number of concurrent identifications, miss / misreading rate, maximum transmission distance, maximum monitoring capacity, and maximum inspection cycle shall meet the requirements.

[0180] 13. Job stability

[0181] The system should undergo a working stability test, and the power-on test time should be no less than 7 days. The system's location monitoring, concurrent identification, maximum transmission distance, maximum monitoring capacity, and maximum inspection cycle should meet the requirements.

[0182] 14. Anti-interference performance

[0183] (1) The system ground equipment should be able to pass the Level 3 electrostatic immunity test with an evaluation level of A;

[0184] (2) The system should be able to pass the Level 2 electromagnetic radiation immunity test with an evaluation level of A;

[0185] (3) The system should be able to pass the Level 2 pulse group immunity test with an evaluation level of A;

[0186] (4) It should be able to pass the AC power port level 3, DC power and signal port level 2 surge impact and interference immunity test, and the evaluation level is A.

[0187] 15. Explosion-proof performance

[0188] The explosion-proof performance of the equipment shall comply with the requirements of GB3836.1, GB3836.2, GB3836.4 and GB3836.18.

[0189] 16. Protection capability

[0190] (1) The protection level of the identification card should reach IP65.

[0191] (2) The protection level of equipment installed and used at the mining face should reach IP65, and equipment with a protection level of IP65 should be used at other locations.

[0192] 17. System linkage

[0193] (1) The system should support multi-system linkage function.

[0194] (2) Realize the linkage control of coal mine safety monitoring system, emergency broadcast system, and other systems.

[0195] (3) Provide interfaces, equipment, protocols, and debugging for system integration free of charge.

[0196] 18. Others

[0197] (1) The system should have software self-monitoring function.

[0198] (2) The system should have software fault tolerance capabilities.

[0199] (3) The system should have real-time multi-tasking capabilities and be able to cyclically run parameter transmission, processing, storage and display without interruption.

[0200] (II) Functional requirements of WI FI 6 wireless communication for mines

[0201] 1. Comprehensive dispatching and commanding function

[0202] 1) Call: Select the user to be called, double-click the user or click the call button to call the selected user. The call starts after the called user answers. If the called user does not answer, the call ends automatically after the timeout. Users cannot call themselves.

[0203] 2) Real-time status display: The user icon will be displayed in real time with the user's status, so that the dispatcher can timely understand the current status of users in the user group under management and realize supervision and control.

[0204] 3) Transfer: When a user is talking to a dispatcher, by entering another number and clicking the transfer button, the dispatcher's current call can be transferred to another user, and the call between the dispatcher and the previous user will end immediately.

[0205] 4) Monitoring: Select the user who is talking and click the monitoring button to listen to the selected user's conversation. The monitored user cannot hear the monitor's voice. Low-level dispatchers cannot use this function on high-level users or dispatchers.

[0206] 5) Force hang-up: The dispatcher can force hang up two users who are on a call. Select any one of the users, or enter the number of any user and click the force hang-up button. Both parties will end the call immediately.

[0207] 6) Forced disconnection: Select the user who is in a call and click the forced disconnection button to start a call with the selected user directly. The original caller with the selected user will be disconnected. Forced disconnection can be performed on users in idle, roaming, unknown and other states to establish a call between the dispatcher and the user. Low-level dispatchers cannot use this function on high-level users or dispatchers.

[0208] 7) Forced Interruption: After selecting a user who is in a call, click the Forced Interruption button to insert into the selected user's call, forming a three-party call. Forced Interruption can be performed on users in idle, roaming, unknown, etc., to establish a call between the dispatcher and the user. Low-level dispatchers cannot use this function on high-level users or dispatchers.

[0209] 8) Answering the call on behalf of another user: Select a user whose call is ringing and click the Answer button to answer the call on behalf of the selected user.

[0210] 9) Answer, group answer: The dispatcher can select the incoming user and click answer to establish a call between the user and the dispatcher. When the dispatcher clicks group answer, a temporary conference is established to answer all calls currently calling the dispatch desk.

[0211] 10) Dial pad: This area is specially prepared for calling external numbers of the system. You can use the soft dial pad to enter the number to call an external phone.

[0212] 11) Recording: The real-time recording function can be enabled for any extension that needs recording. Every call is recorded in real time. The recording files are stored in the dispatch machine or a dedicated recording file storage device. The management and query of the recordings can be completed through a dedicated external recording server, providing safer and more reliable management.

[0213] 12) Night service: This is the unconditional forwarding function. When it is not working hours, you can set the night service number to enable night incoming calls to be directly transferred to another designated dispatch desk or internal phone (such as an IP phone or FXS user on night duty). After setting the night service number, the night service button becomes the cancel night service button, and the night service function will take effect; therefore, any calls to the dispatcher will be directly transferred to the night service number extension, and the extension will ring.

[0214] 13) Queue / hold function: The dispatcher's incoming calls can be queued, and the queue supports group answering; at the same time, the dispatcher can choose to hold and throw the user currently calling back to the queue.

[0215] 14) Easy maintenance and management: The all-Chinese operation interface in the Web mode does not require professional network management personnel. Operators can not only manage and maintain the equipment on any computer in the LAN, but also remotely manage and maintain the equipment through the Internet. More importantly, it allows users to be completely freed from the tedious maintenance work in the past.

[0216] 2. User (mobile terminal) function

[0217] 1) Caller ID: When there is an incoming call, the phone will automatically display the incoming call number 15 digits, and you can decide whether to answer the call based on your needs.

[0218] 2) When used only for voice communications, one base station can support no less than 16 mobile phones talking simultaneously.

[0219] 3) Support automatic roaming and cross-zone switching of mobile phones.

[0220] 4) Support calling service between mobile phones

[0221] 5) Support inbound and outbound call services for fixed-line phones and mobile phones

[0222] 6) Support intercommunication calls between internal voice communication network and external PSTN network

[0223] 7) Support point-to-point SMS

[0224] 8) Point-to-multipoint SMS group messaging

[0225] 3. Online real-time recording function

[0226] The system has the function of online real-time recording of more than 30 channels; the recordings can be queried, deleted, played back and other operations can be performed according to the user level and needs; all users who access the dispatch terminal console can automatically record, and other users can set recordings at will; the recording data is kept for more than half a year.

[0227] 4. Data transmission function

[0228] Wireless network: It must have a high wireless data service carrying capacity, provide transmission channels for other wireless terminal devices, and realize wireless transmission of data and video images.

[0229] 5. Off-line communication function

[0230] The mobile phone has the function of off-line communication. Wireless mobile phones can directly intercom or communicate with each other through independent base stations, group intercom, and one-touch calling functions.

[0231] 6. Extended functionality

[0232] The wireless base station can expand the personnel positioning function and realize the positioning and identification of personnel going down the mine.

[0233] Example 2

[0234] The specific positioning steps of the software algorithm based on ToA and RSS I include:

[0235] S1. Data preprocessing;

[0236] The preprocessing process includes:

[0237] S11. Use filters to remove signal noise and improve signal quality;

[0238] S12. Ensure that the clocks of all positioning substations 2 are synchronized to reduce time errors;

[0239] S2. Use RSSI method to preliminarily locate the personnel in the mining area and obtain a preliminary location estimate;

[0240] The specific calculation formula of the RSSI method is:

[0241] P r (d) = P t +G t +G r -20log 10 (d)-20log 10 (f)-32.44

[0242] Among them, P r (d) is the received signal strength at distance d, P t is the transmit power, G t and G r are the transmitting and receiving antenna gains, d is the distance, and f is the signal frequency;

[0243] Based on the distance d, calculate the preliminary position (x0, y0, z0) using the least squares method or trilateration method;

[0244] S3. Based on the preliminary position, use the ToA method to perform precise positioning;

[0245] The specific calculation formula of the ToA method is:

[0246] Calculate the distance d from positioning card 1 to each substation i :

[0247] d i =c(t i -t0)

[0248] Where c is the speed of light, t i is the time when the signal arrives at the i-th positioning substation 2, and t0 is the sending time;

[0249] The position coordinates (x, y, z) of positioning card 1 are:

[0250]

[0251] Where (x i ,y i ,z i ) is the coordinate of the i-th positioning substation 2, and the initial position (x0, y0, z0) is the initial value calculated by the formula;

[0252] It should be noted that when using the ToA method for fine positioning, an initial estimate is usually required to start the positioning algorithm. The preliminary position information can be used as this initial estimate to help the algorithm converge to the correct position faster, that is, the preliminary position (x0, y0, z0) calculated by the RSSI method. In this way, the ToA algorithm can start from a starting point close to the actual position, rather than from a random starting point, thereby speeding up the convergence speed and improving the positioning accuracy.

[0253] In addition, in some cases, the preliminary position information can be used as a constraint to help eliminate some impossible solutions. For example, if the preliminary position indicates that positioning card 1 is in a certain area, then during fine positioning, only positioning substation 2 in this area can be considered, and substations in other areas can be ignored, thereby reducing the amount of calculation and improving positioning accuracy. Moreover, the preliminary position information can also be used as a means to verify the results of fine positioning. If the results of fine positioning are very different from the preliminary position, the accuracy of the fine positioning results may be questioned, thereby triggering further verification or repositioning.

[0254] S4. Perform anomaly detection on precise location;

[0255] The anomaly detection process includes:

[0256] S41. Detect the sudden change of RSS I value to determine whether there is signal interference or equipment failure. Generally, statistical methods (such as mean and standard deviation) can be used to detect outliers;

[0257] S42. Detect sudden changes in position to determine whether there is a multipath effect or other interference. Generally, historical data can be used for comparison to determine whether the current position is reasonable, or a motion model can be introduced to predict the movement trajectory of personnel and detect abnormal behavior;

[0258] S5. If the abnormal detection result is abnormal, it is necessary to correct the precise position or directly issue an alarm;

[0259] The correction process includes:

[0260] S51. For RSS I value mutation, position correction is used to eliminate the abnormality;

[0261] When correcting the position, the multipath effect model is first established.

[0262] By placing multiple reference points at different locations in the mine, each reference point has a known precise position, and using positioning card 1 to send signals at these reference points, the RSSI value and ToA value of each reference point are recorded. Then, features such as RSSI value, ToA value and environmental information of the reference point (such as tunnel width, height, obstacle type, etc.) are extracted from the collected data, and finally a multipath effect model is trained using a machine learning algorithm (such as support vector machine, neural network). By inputting RSSI value, ToA value and environmental features into the multipath effect model, the model can output the deviation between the actual distance and the calculated distance.

[0263] According to the multipath effect model, the deviation Δd between the actual distance and the calculated distance of each positioning card 1 is calculated, that is, Δd = d actual -d RSSI

[0264] Then combine the calculated (x, y, z) with the deviation value Δd to correct the final position:

[0265]

[0266] in, It is the unit direction vector from positioning card 1 to positioning substation 2.

[0267] S52. For sudden changes in the detection position, an alarm is directly issued.

[0268] S6. If the abnormality detection result is normal, the precise position is output.

[0269] According to this embodiment 2, an example of calculating the position coordinates of the positioning card 1 is given:

[0270] First, assume that there are three positioning substations 2, namely: A (0, 0, 0,), B (10, 0, 0,) and C (0, 10, 0), and the position of the positioning card 1 that needs to be determined is: (x, y, z).

[0271] Then the initial distance d from the positioning card 1 to each positioning substation 2 is determined by RSSI A0 , d B0 , d C0 , and d A0 =5 m, d B0 =7m, d C0 =8m;

[0272] The preliminary position is then calculated using trilateration:

[0273]

[0274] Substituting the known coordinates and distances:

[0275]

[0276] The solution is:

[0277]

[0278] That is, the initial position (x0, y0, z0) is: (3.8, 3.05, 0);

[0279] Next, the accurate distance from positioning card 1 to each positioning substation 2 is obtained by the ToA method: d A ,d B ,d C

[0280] And d A =5.1 m, d A =7.2 m, d A =8.1 m;

[0281] Use the least squares method to calculate the exact position coordinates, specifically:

[0282]

[0283] After substituting the known coordinates and distances:

[0284]

[0285] The preliminary position (3.8, 3.05, 0) is used as the initial estimate, and then the least squares problem is solved by a numerical optimization method. The final position obtained by the numerical optimization method is (x, y, z) = (3.9, 3.1, 0).

[0286] The above are only preferred embodiments of the present invention and are 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 mining personnel location management system, comprising a positioning card (1), a positioning substation (2), a host (3) and auxiliary equipment (4), Each positioning card (1) is carried by a corresponding mining personnel and is used to send a unique location signal at regular intervals; The positioning substation (2) is distributed at key locations in the mining area and is used to receive signals from the positioning card (1); The host (3) is used to receive data from the positioning substation (2) and use a software algorithm based on ToA and RSSI to locate personnel in the mining area; The auxiliary equipment (4) includes a network switch, a power box, an antenna, an electric cable, an optical cable, a junction box and a lightning arrester, and is used to locate the connection between the substation (2) and the host (3), and to improve the signal receiving function of the substation (2) or the host (3).

2. The mining area personnel location management system according to claim 1, characterized in that: The distribution area of ​​the positioning substation (2) is the wellhead, tunnel, mining working face and refuge cavern, and the interval between two adjacent positioning substations (2) in the tunnel is 30-50m, and the number of positioning substations (2) in the mining working face is 2-3.

3. The mining area personnel location management system according to claim 1, characterized in that: The specific positioning steps of the software algorithm based on ToA and RSSI include: S1. Data preprocessing; S2. Use RSSI method to preliminarily locate the personnel in the mining area and obtain a preliminary location estimate; S3. Based on the preliminary position, use the ToA method to perform precise positioning; S4. Perform anomaly detection on precise location; S5. If the abnormal detection result is abnormal, it is necessary to correct the precise position or directly issue an alarm; S6. If the abnormality detection result is normal, the precise position is output.

4. The mining area personnel location management system according to claim 3, characterized in that: The specific calculation formula of the RSSI method is: P r (d)=P t +G t +G r -20log 10 (d)-20log 10 (f)-32.44 Among them, P r (d) is the received signal strength at distance d, P t is the transmit power, G t and G r are the transmitting and receiving antenna gains, d is the distance, and f is the signal frequency; Based on the distance d, the preliminary position (x0, y0, z0) is calculated using the least squares method or trilateration.

5. The mining area personnel location management system according to claim 3, characterized in that: The specific calculation formula of the ToA method is: Calculate the distance d from the positioning card (1) to each substation i : d i =c(t i -t0) Where c is the speed of light, t i is the time when the signal arrives at the i-th positioning substation (2), and t0 is the sending time; The position coordinates (x, y, z) of the positioning card (1) are: Where (x i ,y i ,z i ) is the coordinate of the i-th positioning substation (2), and the initial position (x0, y0, z0) is the initial value calculated by the formula.

6. The mining area personnel location management system according to claim 5, characterized in that: The anomaly detection process includes: S41. Detect the sudden change of RSSI value to determine whether there is signal interference or equipment failure; S42. Detection position mutations to determine whether there is a multipath effect or other interference.

7. The mining area personnel location management system according to claim 6, characterized in that: The correction process of step S5 includes: S51. For RSSI value mutation, position correction is used to eliminate the abnormality; S52. For sudden changes in the detection position, an alarm is directly issued.

8. The mining personnel location management system according to claim 1, characterized in that: The management system also includes a portable locator, which is used to independently measure each locator card (1) when it is off-grid and display the position of the locator card (1).

9. The mining area personnel location management system according to claim 1, characterized in that: The positioning card (1) has the functions of receiving emergency evacuation commands, sound, light and vibration alarms.

10. The mining area personnel location management system according to claim 1, characterized in that: The host (3) has the function of issuing an emergency alarm when the positioning card (1) remains stationary for a long time.

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