CN216645107U - Safety management and signal interference prevention system for electronic detonator detonation region - Google Patents

Abstract

The utility model discloses a safety management and signal interference prevention system for an electronic detonator detonation area and an operation method thereof, wherein the system comprises a signal interference module, a signal processing module and a signal processing module, wherein the signal interference module is used for reducing a mobile phone signal in the detonation area to a 2G state; the radio frequency transmitting module is used for transmitting radio frequency signals to base stations in the area and searching area information of a public network in the area through radio frequency; the radio frequency receiving module is used for receiving an uplink wireless signal sent by the mobile phone when the mobile phone requests to access the local area base station; the signal processing module comprises a demodulator and a signal multi-core processor. The utility model connects the mobile phone of the user in the blasting area to the base station, once the mobile phone is accessed to the base station, the normal communication can not be carried out any more, and the short message is sent to the mobile phone through the base station after the mobile phone number is obtained; whether the detained personnel exist in the blasting area can be judged according to the current position of the mobile phone; the safety of personnel entering the blasting area is guaranteed, and the interference of mobile phone signals to electronic blasting is avoided.

Description

Electronic detonator detonation area safety management and anti-signal jamming system

technical field

The utility model belongs to the technical field of wireless communication, in particular to a system for safety management and signal interference prevention in the initiation area of electronic detonators.

Background technique

The electronic detonator detonation area safety management and anti-signal jamming system is mainly used for danger warning, personnel reminder and signal shielding, etc., and has gradually become an important guarantee for urban public safety. In the era of rapid development of wireless communication technology, more and more products use wireless communication for transmission. However, some specific places (such as electronic detonator detonation areas, military forbidden areas, etc.) may have restrictions on wireless communication to determine the safety of these areas.

Signal jammers are often used to restrict wireless communication in a certain area, but this method cannot be applied to certain specific environments. For example, when blasting electronic detonators, it is necessary to ensure that there is no interference from mobile phone signals, and the safety of personnel in the blasting area must also be ensured. At this time, it is not only necessary to shield the mobile phone signals in the blasting area, but also monitor and notify the personnel in the blasting area to ensure the normal operation of blasting activities.

For the problem that the signal shielding system proposed above cannot meet the monitoring and notification requirements of personnel in the blasting environment, there are two solutions: one is to determine the location of personnel through video surveillance in the area. However, once the blasting area is larger, more equipment is required, and a special person is required to notify, which requires a lot of manpower and material resources. The other uses sensor technology to determine whether someone has entered the blasting area, and once someone enters, it will automatically alarm to attract the attention of the staff. Although this method can determine that someone has entered the system, it cannot determine the location of the person, and it is difficult to notify.

Utility model content

In view of this, the purpose of this utility model is to provide an electronic detonator initiation area safety management and anti-signal interference system. The system is based on the base station model, uses the GSM system framework, and combines the RSSI triangular centroid positioning algorithm based on Kalman to establish a system that can effectively detonate the detonation area. The personnel in the blasting area can be monitored and notified, and the communication between mobile phones can also be blocked, which not only ensures the safety of personnel entering the blasting area, but also achieves the purpose of eliminating the interference of mobile phone signals to electronic blasting.

In order to achieve the above purpose, the technical solutions adopted are as follows:

Electronic detonator detonation area safety management and anti-signal jamming system, including:

The signal interference module is used to reduce the mobile phone signal in the blasting area to the 2G state, and the mobile phone in the 2G signal state will automatically select the area;

The radio frequency transmitter module is used to send radio frequency signals to the base stations in the area, search the area information of the public network in the area through radio frequency, change the radio frequency power, optimize the parameters, and set the base station as the optimal area in the area;

The radio frequency receiving module is used to receive the uplink wireless signal sent by the mobile phone when the mobile phone requests to access the base station in the area;

The signal processing module includes a demodulator and a signal multi-core processor, the demodulator receives the signal transmitted by the radio frequency receiving module and adjusts it into an uplink wireless signal and transmits it to the signal multi-core processor, and the multi-core processor protocol processes to obtain the relevant information of the user, and then Determine the user's location through Kalman-based RSSI algorithm and triangular centroid positioning algorithm;

The warning notification module is used to automatically send a reminder text message to users who break into the blasting area according to the obtained user information;

The terminal display module is used to display the information of all inhaled mobile phone users and the inhalation time of the signal processing module on the terminal, and display the registered personnel's mobile phone number, location information and inhalation time on the screen;

In addition, the terminal display module controls the radio frequency transmitting module, the warning notification module and the signal processing module;

The power module provides power for each module.

As a further improvement of the present invention, the signal jamming module is a 3/4/5G signal jammer.

As a further improvement of the present utility model: the radio frequency transmitting module includes a power divider and a first antenna, the radio frequency receiving module includes a second antenna and a radio frequency receiver, and the first antenna and the second antenna are respectively used for radio frequency transmitting module signals transmission and reception at the base station.

The beneficial effects of the present utility model are:

The utility model is based on the base station model and uses the GSM system framework to connect the mobile phone of the user in the blasting area to the base station. Once the mobile phone is connected to the base station, normal communication can no longer be carried out, so as to achieve the purpose of signal shielding. Kalman's RSSI triangular centroid positioning algorithm obtains the user's mobile phone number, time, location and other related information; after obtaining the mobile phone number, it sends a short message to the mobile phone through the base station to achieve the purpose of notifying the stranded personnel in the blasting area; it can be judged by the current location of the mobile phone Whether there are stranded personnel in the blasting area; it not only ensures the safety of personnel entering the blasting area, but also avoids the interference of mobile phone signals to electronic blasting.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide further understanding of the present invention, and the schematic embodiments of the present invention and descriptions thereof are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

Fig. 1 is the structural composition schematic diagram of the present utility model;

2 is a schematic diagram of a signal processing module in the utility model;

Fig. 3 is a schematic diagram of a triangular centroid positioning algorithm;

FIG. 4 is a schematic diagram of the work flow of the present invention.

Detailed ways

It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict. The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

In order to make those skilled in the art better understand the solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only The embodiments are part of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by persons of ordinary skill in the art without creative work shall fall within the protection scope of the present application.

As shown in Figure 1-2:

Electronic detonator detonation area safety management and anti-signal jamming system, including:

Signal interference module 1 is used to reduce the mobile phone signal in the 3G, 4G and 5G state in the blasting area to the 2G state. The mobile phone in the 2G signal state will automatically select the area, but the mobile phone in the 2G state will not be affected;

The radio frequency transmitting module 2, including the power divider 21 and the first antenna 22, is used to send radio frequency signals to the base station in the area, search the area information of the public network in the area through radio frequency, change the radio frequency power, optimize the parameters, and set the base station to be in the area The optimal area is far superior to other areas; after the mobile phone is turned on, it usually searches for the broadcast channel in the surrounding area, selects the optimal area by comparing the strength of the channel signal, and obtains the configuration parameters of the area according to the obtained signal; Therefore, the mobile phone will always be in the state of receiving the broadcast area and perform area measurement; generally, the frequency of public network base stations broadcast messages is not high, and the frequency of broadcast messages can be increased by optimizing parameters, so that the mobile phone can access the virtual area of the base station at the fastest speed;

The radio frequency receiving module 3, including the second antenna 31 and the radio frequency receiver 32, is used for receiving the uplink wireless signal sent by the mobile phone when the mobile phone requests to access the base station in the area, that is, for receiving the uplink wireless signal sent by the mobile phone terminal, and entering the area After the mobile phone inside the virtual area is connected to the virtual area, it will first receive a broadcast message, which includes the switching algorithm, encryption algorithm and related parameter configuration; the switching algorithm is based on the principle of updating across the location area and simulates the condition of the mobile phone crossing the location area. Induce the mobile phone to start the location update program; when the location area parameters are different from the current area, the mobile phone in the area thinks that it has crossed the edge of the location area and will start the location update program; therefore, the mobile phone will quickly complete the area switching after receiving the message. At this time, the transmitted signal will be received by the radio frequency receiving module 3;

The signal processing module 4 includes a demodulator 41 and a signal multi-core processor 42, the demodulator 41 receives the signal transmitted by the radio frequency receiving module 3 and adjusts it into an uplink wireless signal and transmits it to the signal multi-core processor 42, and the multi-core processor protocol is processed to obtain The user's relevant information, and then determine the user's position through the triangular centroid positioning algorithm; in layman's terms, after receiving the mobile phone signal, the signal demodulator 41 works to demodulate the received signal into an uplink wireless signal, and the demodulated signal The data validity is verified by the corresponding verification algorithm in the signal multi-core processor 42. The verified information blocks are saved as valid data blocks, and the unverifiable information blocks will be discarded; the multi-core processor carries the protocol stack software, Complete the tailoring of the redundancy function of its system framework and the optimization of the regional access algorithm and reselection algorithm. The information blocks that pass the verification will be submitted to the upper-layer protocol processing unit, and the protocol processing unit will parse the information blocks and complete the information. extraction;

A warning notification module 5 is used to automatically send a reminder short message to users who break into the blasting area according to the obtained user information;

The terminal display module 6 is used to display on the terminal the information of all the inhaled mobile phone users and the inhaled time of the signal processing module 4, and display the mobile phone number, location information and inhalation time of the registered personnel on the screen; and the terminal The display module 6 mainly completes the work of signal demodulation, protocol processing, information block verification, information extraction and location acquisition. When the mobile phone accesses the base station and initiates an uplink access process, the signal processing module 4 will demodulate the signal into an uplink wireless signal. The R channel plays a key role in receiving the uplink signal. When the mobile phone establishes communication with the base station, the mobile phone will send a probe signal to the base station through the R channel to apply for a dedicated channel for signal transmission; moreover, as long as the current environment When the signal strength is stronger than before, the phone will automatically transmit a connection signal. Therefore, when the signal strength changes, we need to judge whether it is caused by the change of the R signal, and we should further decode and interpret the information through the R signal. As long as the R signal is detected, it indicates that the uplink signal starts to be sent, and the uplink signal can be received in time. After receiving the uplink signal, the physical layer of the protocol processing unit optimizes its transmission mode, and the signaling continues to be sent to the upper layer quickly and processed by the upper layer. In order to obtain the information of the mobile phone user, it is necessary for the system to construct the immediate distribution of signaling. After receiving the immediate allocation signaling, the mobile phone will send a probe frame carrying information on its allocated SDCCH. SDCCH is a point-to-point two-way channel between the base station and the mobile station, which is used to transmit commands and channel assignment information between the base station and the mobile station, such as location update; the system extracts the user's mobile phone number information from the detection frame of the information; Then the personnel are located. Here, the RSSI-based triangular centroid positioning algorithm is used to obtain the location of the personnel in the detonation area; first, three base stations are built in the detonation area to ensure that the entire detonation area can be covered, and then several test points are selected and recorded in these Point the signal strength received by each base station, and establish an offline database (x, y, ss1, ss2, ss3) of the relationship between the position and signal strength of each point. In actual positioning, the measured signal strength (ss1', ss2', ss3') is compared with the signal strength recorded in the database, and the coordinates of the point with the smallest signal strength mean square error are taken as the coordinates of the node; There is always an error between the signal strength and the actual situation. Because of the complexity of the actual environment, the distance d from the converted anchor node (the node recorded in the database) to the unknown node (that is, the position of the personnel in the detonation zone) is always greater than the actual two nodes. In order to reduce the error of the distance between the anchor node and the unknown node, we use the RSSI algorithm based on Kalman filter. The distance d calculated by the signal mean square error and the measured signal strength (ss1', ss2', ss3') are regarded as the estimated value as a four-dimensional vector (ss1', ss2', ss3', d) ^T , because When the observed value is d, the observation matrix H can be obtained as [0 00 1]; through the RSSI algorithm, the state transition matrix F can be obtained; the noise covariance matrix Q is a fourth-order matrix with a diagonal element of 0.01; the state covariance matrix P is Unit matrix; after these parameters are obtained, Kalman's iterative filtering process is performed, and the error of the distance d obtained after filtering will be smaller than that calculated by the RSSI algorithm and based on the empirical model; it solves the problem between the anchor node and the unknown node. After the problem of large distance error, the triangular centroid positioning algorithm is used to determine the position of the unknown point D; the distance between nodes A and D is calculated as rA; the distance between nodes B and D is rB; the distance between nodes C and D is rC; as shown in Figure 3 As shown, take A, B, and C as the centers respectively; rA, rB, and rC are the radii to draw a circle, and the overlapping area can be obtained; the basic idea of the triangle centroid location algorithm here is: Calculate the three features of the overlapping area of the three circles The coordinates of the point, take these three points as the vertices of the triangle, and the unknown point is the center of mass of the triangle.

In addition, the terminal display module 6 controls the radio frequency transmitting module 2, the warning notification module 5 and the signal processing module 4;

The power module 7 provides power for each module.

The signal jamming module 1 is a 3/4/5G signal jammer, and the first antenna 22 and the second antenna are respectively used for the transmission of the signal of the radio frequency transmission module 2 and the reception of the base station.

As in accompanying drawing 4, the working flow chart of this system is described in detail:

Personnel safety management and anti-signal interference operation methods in the detonation area of electronic detonators, including:

The environment for building the base station: Set the power of the base station according to the blasting area to avoid excessive power affecting the peripheral mobile phones;

Connect the mobile phone signal to the base station: The signal in the blasting area is reduced to 2G through the signal shielding module, and the mobile phone in the 2G signal is easier to access the base station, so that the mobile phone entering the area can stably receive the information sent by the base station;

Acquire uplink wireless signals: After the base station system configuration is completed, it will start to send broadcast messages within the specified range, and at the same time continuously monitor the uplink messages to complete the coverage and monitoring of the entire area. The mobile phone sends the uplink signal for registration, which is captured by the radio frequency of the base station, and the information block of the signal is extracted;

Information block verification and extraction: Uplink access information has corresponding check bits, and the base station will perform data validity verification through the corresponding verification algorithm. The information blocks that pass the verification are valid data blocks, and the information blocks that cannot be verified. Will be discarded, and the verified information block will be submitted to the upper-layer protocol processing unit, and the protocol processing unit will parse the information block to complete the information extraction;

Information prompt and location acquisition: After completing the extraction of mobile phone numbers, send reminder text messages to people in the area through the SMS transmitter, and at the same time, monitor the location of the target person's mobile phone through the display terminal to ensure the safety of the personnel.

The above descriptions 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 changes. 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 (3)

1. Electronic detonator detonation area safety management and anti-signal interference system, is characterized in that, comprises: The signal interference module is used to reduce the mobile phone signal in the blasting area to the 2G state, and the mobile phone in the 2G signal state will automatically select the area; The radio frequency transmitter module is used to send radio frequency signals to the base stations in the area, search the area information of the public network in the area through radio frequency, change the radio frequency power, optimize the parameters, and set the base station as the optimal area in the area; The radio frequency receiving module is used to receive the uplink wireless signal sent by the mobile phone when the mobile phone requests to access the base station in the area; The signal processing module includes a demodulator and a signal multi-core processor, the demodulator receives the signal transmitted by the radio frequency receiving module and adjusts it into an uplink wireless signal and transmits it to the signal multi-core processor, and the multi-core processor protocol processes to obtain the relevant information of the user, and then Determine the user's location through Kalman-based RSSI algorithm and triangular centroid positioning algorithm; The warning notification module is used to automatically send a reminder text message to users who break into the blasting area according to the obtained user information; The terminal display module is used to display the information of all inhaled mobile phone users and the inhalation time of the signal processing module on the terminal, and display the registered personnel's mobile phone number, location information and inhalation time on the screen; In addition, the terminal display module controls the radio frequency transmitting module, the warning notification module and the signal processing module; The power supply module provides power for the signal interference module, the radio frequency transmitting module, the radio frequency receiving module, the signal processing module, the warning notification module and the terminal display module. 2 . The electronic detonator initiation area safety management and anti-signal jamming system according to claim 1 , wherein the signal jamming module is a 3/4/5G signal jammer. 3 . 3. The electronic detonator initiation area safety management and anti-signal interference system according to claim 1, wherein the radio frequency transmitting module comprises a power divider and a first antenna, and the radio frequency receiving module comprises a second antenna and a radio frequency receiver , the first antenna and the second antenna are respectively used for the transmission of the radio frequency transmission module signal and the reception of the base station.

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