Method for determining optimal communication frequency between full-in-hole wireless electronic detonator and exploder

Abstract

The invention discloses a method for determining an optimal communication frequency between a full-in-hole wireless electronic detonator and an exploder, and solves the problem of how to realize reliable communication between the full-in-hole wireless electronic detonator and the exploder during on-site blasting. Comprising an exploder, a wireless electronic detonator and a blast hole in a blasting tunnel face. The design frequency range of wireless signal communication between the exploder and the wireless electronic detonator is f0-fn, a frequency signal receiving strength calculation module is arranged in the wireless electronic detonator, and a frequency signal receiving strength calculation module is arranged in the exploder. The method comprises the following steps: carrying out a test on signal receiving success rate and signal receiving strength of communication between an antenna in the wireless electronic detonator and a transmitting antenna of an exploder in advance to obtain a relation curve between the antenna and the transmitting antenna; and a group of data of signal receiving strength and handshake frequency is obtained in a blasting site by a frequency scanning method, and the signal receiving strength and the handshake frequency are creatively combined, so that the optimal communication frequency is selected for each wireless electronic detonator.

Description

Technical Field

[0001] This invention relates to the field of wireless electronic detonator technology, and in particular to a method for determining the preferred communication frequency between a fully-entrant wireless electronic detonator and an initiator on a blasting face. Background Technology

[0002] A wireless electronic detonator mainly consists of an ignition module, a control module, a wireless module, and an antenna. The detonator and the wireless electronic detonator communicate wirelessly. The blaster operates the detonator, transmitting control commands and detonation data to the wireless electronic detonator. The wireless electronic detonator replies to the detonator with control commands and detonates under the detonator's control. During blasting operations, the blaster first drills blast holes on the blasting face of the area to be blasted, then inserts the explosives and the wireless electronic detonator into the blast holes, retreats to a safe area, and then detonates the detonator. Because the blast hole can affect wireless communication signals, in actual operation, the antenna of the wireless electronic detonator is usually extended to the outside of the blast hole to facilitate the wireless electronic detonator receiving the detonation signal. In the use of wireless electronic detonators, if the entire electronic detonator (including the antenna) can be inserted into the blast hole, it can simplify the workload of blasting construction and reduce the difficulty of construction. At the same time, the antenna of the wireless electronic detonator can be integrated into the detonator. Wireless electronic detonators that can achieve this function are called fully-inserted wireless electronic detonators.

[0003] After the antenna of a wireless electronic detonator is inserted into the borehole, its impedance changes due to the influence of the borehole and the surrounding medium. An antenna designed for communication frequency f1, once inserted into the borehole, will shift its communication frequency to f2 due to the influence of the borehole and the surrounding medium. This frequency shift is related to the shape of the borehole, the composition of the borehole wall medium, and other geological conditions, making it difficult to accurately predict the degree of frequency shift in advance. This frequency shift directly affects the reliable communication between the fully-inserted electronic detonator and the initiator, jeopardizing the normal progress of blasting operations. Overcoming these problems has become a difficult challenge to be solved in the blasting of fully-inserted wireless electronic detonators. Summary of the Invention

[0004] This invention provides a method for determining the preferred communication frequency between a fully-entrance wireless electronic detonator and a detonator, solving the technical problem of how to achieve reliable communication between a fully-entrance electronic detonator and a detonator during on-site blasting.

[0005] The present invention solves the above technical problems through the following technical solutions: A method for determining the preferred communication frequency between a fully-entered wireless electronic detonator and a detonator, comprising a detonator, a wireless electronic detonator, and a blast hole on the blasting face; the design frequency range for wireless signal communication between the detonator and the wireless electronic detonator is f0-f nThe wireless electronic detonator is equipped with a frequency signal reception strength calculation module, and the detonator is equipped with a frequency signal reception strength calculation module; the feature is the following steps: The first step is to set up an experimental platform in the laboratory. The experimental platform consists of a wireless signal generator, a wireless signal attenuator, counter A, and counter B. Connect the wireless signal generator to the wireless signal attenuator and counter A respectively. The wireless signal generator then operates at frequencies ranging from f0 to f1. n Each communication frequency f is used as a test frequency, and wireless test signals are transmitted to the detonator and the wireless electronic detonator respectively through a wireless signal attenuator. A frequency signal reception strength calculation module in the wireless electronic detonator records the reception strength of each test frequency signal, and a frequency signal reception strength calculation module in the detonator also records the reception strength of each test frequency signal. Based on the above data, the wireless signal reception success rate P of the detonator is plotted. 主 The curve and the wireless signal reception success rate P of the wireless electronic detonator 从 A curve graph; The second step is to set the communication frequency of both the detonator and the wireless electronic detonator to f0 at the blasting site, insert the wireless electronic detonator into a blasting hole on the blasting face in a full-hole manner, and set the detonator to the detonation operation position. The third step involves the detonator sending a "signal detection command" to the wireless electronic detonator at frequency f0. If the wireless electronic detonator in the hole receives the "signal detection command," the received signal strength RSSI is calculated. 从 And will receive the signal command and calculate the received signal strength RSSI 从 The system sends a response to the detonator; upon receiving the response signal from the wireless electronic detonator, the detonator calculates the received signal strength (RSSI) of the response signal. 主 Thus, the first set of handshake signals and their received signal strength data (f0, RSSI) are obtained. 从 RSSI 主 ); Step 4: The detonators operate at frequencies f1-f n Send a "signal detection command" to the wireless electronic detonator, and repeat step three to obtain signal strength data (f1, RSSI) at different frequencies. 从 RSSI 主 )-(f n RSSI 从 RSSI 主 ); Step 5: The success rate P of the detonator's wireless signal reception obtained in Step 1. 主In the curve graph, find the RSSI of each group of data in steps three and four. 主 and RSSI 从 The corresponding wireless signal reception success rate P of the detonator 主 The corresponding values ​​and the wireless signal reception success rate P of the wireless electronic detonator 从 The corresponding value, and the corresponding detonator wireless signal reception success rate P 主 The corresponding value, multiplied by the wireless signal reception success rate P of the wireless electronic detonator. 从 The corresponding value is used to obtain the overall communication success rate P. 总 That is, P 总 =P 主 ×P 从 This allows for further combination to obtain a set of data: (f1, P) 总 )-(f n P 总 In this set of data, P 总 The frequency of the data group containing the maximum data value is the preferred communication frequency f. 优选 .

[0006] The success rate P of wireless signal reception of the detonator in the first step. 主 The graph shows the success rate of wireless signal reception P of the wireless electronic detonator. 从 The method for obtaining the curve is as follows: First, connect counter B to the detonator. Set the attenuation setting of the wireless signal attenuator to 100%. The wireless signal generator continuously emits a wireless test signal at frequency f to the wireless signal attenuator. Simultaneously, counter A counts the number of test signals emitted by the wireless signal generator (M). The continuously emitted wireless test signal at frequency f is transmitted to the detonator after passing through the wireless signal attenuator. Counter B counts the number of wireless signals received by the detonator (Q). At the same time, the frequency signal reception strength calculation module in the detonator calculates the received wireless signal strength RSSI1. Divide the number of wireless signals received in counter B (Q) by the number of test signals emitted in counter A (M) to obtain the wireless signal reception success rate P1 of the detonator, and obtain the first set of data (RSSI1, P1). By sequentially decreasing the attenuation level of the wireless signal attenuator and repeating the above steps, multiple sets of data (RSSI) can be obtained. N P N Based on this data, a plot was created with the horizontal axis representing the Received Radio Signal Strength (RSSI) and the vertical axis representing the success rate (P) of the detonator's radio signal reception. 主 A curve graph; On the aforementioned test platform, the initiator was replaced with the aforementioned wireless electronic detonator, and the above steps were repeated to obtain the wireless signal reception success rate P of the wireless electronic detonator. 从 The curve graph.

[0007] After completing the first step, first determine the frequency scanning range of the "signal detection command". The specific method is as follows: Insert the wireless electronic detonator into a metal sleeve, and use the detonator to sequentially emit frequencies ranging from f0 to f... n The wireless electronic detonator receives the wireless signal and replies it to the detonator, using a frequency range of f0-f. n The wireless signals that the wireless electronic detonator cannot receive are removed from the wireless signals, thereby narrowing the scanning frequency range. Then, the second and subsequent steps are performed based on the narrowed scanning frequency range.

[0008] After completing the second step, the frequency scanning range of the "signal detection command" must first be determined at the blasting site. The specific method is as follows: A. The detonator sends a “frequency setting command” and a “communication frequency confirmation command” sequentially to the wireless electronic detonator in the blast hole at frequency f1. B. If the wireless electronic detonator receives the "frequency setting command" and starts the internal timer, and receives the "communication frequency confirmation command" before the internal timer finishes counting down, it means that frequency f1 can be set successfully and sends a frequency confirmation signal back to the detonator; if the wireless electronic detonator does not receive the "frequency setting command" from the detonator or does not receive the "communication frequency confirmation command" before the internal timer finishes counting down, it means that frequency f1 cannot be set successfully. C. After the detonator sends the "communication frequency confirmation command", it waits for the wireless electronic detonator to reply. If the detonator receives a reply signal from the wireless electronic detonator, it means that frequency f1 can be successfully confirmed. If the detonator does not receive a reply signal from the wireless electronic detonator, it means that frequency f1 cannot be successfully confirmed. D. If frequency f1 can be successfully set in step B and frequency f1 confirmation is also successful in step C, then frequency f1 is selected as the communication frequency of the narrowed scanning frequency range; otherwise, frequency f1 is excluded. E. The initiator sequentially delivers frequencies from f2 to f... n The wireless electronic detonator in the blast hole is sequentially sent with a "frequency setting command" and a "communication frequency confirmation command"; steps B to D are repeated to filter out the narrowed scanning frequency range, and steps three to five are performed with the narrowed scanning frequency range to obtain the preferred communication frequency f.

[0009] Select 3-5 blasting holes on the blasting face and measure the preferred communication frequency for each hole. Add up the obtained preferred communication frequency values ​​and average them to obtain the average communication frequency value. Use the average communication frequency value as the detonation communication frequency of each wireless electronic detonator in the hole on the blasting face.

[0010] This invention addresses the defects of antenna signal frequency shift and decreased wireless signal communication quality in fully-perforated wireless electronic detonators. It pre-tests the communication signal reception success rate and signal strength of the antenna in the wireless electronic detonator and the transmitting antenna of the detonator, obtaining a curve showing the relationship between the communication signal reception success rate and signal strength. Then, at the blasting site, a set of data on signal strength and handshake frequency is obtained using a frequency scanning method. These two sets of data are creatively combined to select the optimal communication frequency for each wireless electronic detonator, thereby achieving efficient and safe detonation and blasting operations for all fully-perforated wireless electronic detonators on the blasting face. Attached Figure Description

[0011] Figure 1 This is a flowchart of the frequency scanning process of the present invention; Figure 2 This is a schematic diagram of the structure of the fully-accessible electronic detonator of the present invention; Figure 3 This describes the frequency switching process of the detonator of the present invention; Figure 4 This describes the frequency switching process of the wireless electronic detonator of the present invention; Figure 5 This is a schematic diagram of the laboratory testing platform of the present invention; Figure 6 This is a graph showing the success rate P of wireless signal reception for the detonator and wireless electronic detonator of the present invention. Detailed Implementation

[0012] The present invention will now be described in detail with reference to the accompanying drawings: A method for determining the preferred communication frequency between a fully-entered wireless electronic detonator and a detonator, comprising a detonator, a wireless electronic detonator, and a blast hole on the blasting face; the design frequency range for wireless signal communication between the detonator and the wireless electronic detonator is f0-f n The wireless electronic detonator is equipped with a frequency signal reception strength calculation module, and the detonator is also equipped with its own frequency signal reception strength calculation module. The feature is the following steps: The first step is to set up an experimental platform in the laboratory. The experimental platform consists of a wireless signal generator, a wireless signal attenuator, counter A, and counter B. Connect the wireless signal generator to the wireless signal attenuator and counter A respectively. The wireless signal generator then operates at frequencies ranging from f0 to f1. n Each communication frequency f is used as a test frequency, and wireless test signals are transmitted to the detonator and the wireless electronic detonator respectively through a wireless signal attenuator. A frequency signal reception strength calculation module in the wireless electronic detonator records the reception strength of each test frequency signal, and a frequency signal reception strength calculation module in the detonator also records the reception strength of each test frequency signal. Based on the above data, the wireless signal reception success rate P of the detonator is plotted. 主 The curve and the wireless signal reception success rate P of the wireless electronic detonator 从 The curve graph.

[0013] The second step is to set the communication frequency of both the detonator and the wireless electronic detonator to f0 at the blasting site, and then insert the wireless electronic detonator into a blasting hole on the blasting face in a full-hole manner, and place the detonator in the detonation operation position. First, define the following three key commands: (a) "Frequency Setting Command": This command contains parameter f and is sent by the detonator to the wireless electronic detonator. After receiving this command, the wireless electronic detonator sets the communication frequency to parameter f in the command; (b) "Communication Frequency Confirmation Command": This command is sent by the detonator to the wireless electronic detonator. After receiving this command, the wireless electronic detonator replies to the detonator, indicating that the new communication frequency has been confirmed; (c) "Signal Detection Command": This command is sent by the detonator to the wireless electronic detonator. After receiving this command, the wireless electronic detonator calculates the RSSI of the signal it just received. 从 (Received signal strength), and set RSSI 从 The value is transmitted back to the detonator; The third step involves the detonator sending a "signal detection command" at frequency f0 to the wireless electronic detonator in the blast hole. If the wireless electronic detonator in the hole receives the "signal detection command," the received signal strength RSSI is calculated. 从 And will receive the signal command and calculate the received signal strength RSSI 从 The system sends a response to the detonator; upon receiving the response signal from the wireless electronic detonator, the detonator calculates the received signal strength (RSSI) of the response signal. 主 Thus, the first set of handshake signals and their received signal strength data (f0, RSSI) are obtained. 从 RSSI 主 ); Step 4: The detonators operate at frequencies f1-f nSend a "signal detection command" to the wireless electronic detonator, and repeat step three to obtain signal strength data (f1, RSSI) at different frequencies. 从 RSSI 主 )-(f n RSSI 从 RSSI 主 ); Step 5: The success rate P of the detonator's wireless signal reception obtained in Step 1. 主 In the curve graph, find the RSSI of each group of data in steps three and four. 主 and RSSI 从 The corresponding wireless signal reception success rate P of the detonator 主 The corresponding values ​​and the wireless signal reception success rate P of the wireless electronic detonator 从 The corresponding value, and the corresponding detonator wireless signal reception success rate P 主 The corresponding value, multiplied by the wireless signal reception success rate P of the wireless electronic detonator. 从 The corresponding value is used to obtain the overall communication success rate P. 总 That is, P 总 =P 主 ×P 从 This allows for further combination to obtain a set of data: (f1, P) 总 )-(f n P 总 In this set of data, select P. 总 The frequency of the data group containing the maximum data value is the preferred communication frequency f. 优选 .

[0014] The success rate P of wireless signal reception of the detonator in the first step. 主 The graph shows the success rate of wireless signal reception P of the wireless electronic detonator. 从 The method for obtaining the curve is as follows: First, connect counter B to the detonator. Set the attenuation setting of the wireless signal attenuator to 100%, i.e., no attenuation. The wireless signal generator continuously emits a wireless test signal at frequency f to the wireless signal attenuator. Simultaneously, counter A counts the number of test signals emitted by the wireless signal generator by M. The continuously emitted wireless test signal at frequency f is transmitted to the detonator after passing through the wireless signal attenuator. Counter B counts the number of wireless signals received by the detonator by Q. At the same time, the frequency signal reception strength calculation module set in the detonator calculates the received wireless signal strength RSSI1. Divide the number of wireless signals received by counter B by the number of test signals emitted by counter A by M to obtain the wireless signal reception success rate P1 of the detonator, and obtain the first set of data (RSSI1, P1). By sequentially decreasing the attenuation level of the wireless signal attenuator and repeating the above steps, multiple sets of data (RSSI) can be obtained. N P N Based on this data, a plot was created with the horizontal axis representing the Received Radio Signal Strength (RSSI) and the vertical axis representing the success rate (P) of the detonator's radio signal reception. 主 A curve graph; On the aforementioned test platform, the initiator was replaced with the aforementioned wireless electronic detonator, and the above steps were repeated to obtain the wireless signal reception success rate P of the wireless electronic detonator. 从 The curve graph.

[0015] After completing the first step, the frequency scanning range of the "signal detection command" must be determined. In practical use, determining the frequency scanning range is crucial; an excessively large range consumes extra time, while an excessively small range may miss the optimal communication frequency. Since metal has a greater impact on the antenna than rock or soil, the frequency scanning range can be narrowed using the following method: The wireless electronic detonator is inserted into a metal sleeve, and the detonator sequentially fires frequencies ranging from f0 to f... n The wireless electronic detonator receives the wireless signal and replies it to the detonator, using a frequency range of f0-f. n The wireless signals that the wireless electronic detonator cannot receive are removed from the wireless signals, thereby narrowing the scanning frequency range. Then, the second and subsequent steps are performed based on the narrowed scanning frequency range.

[0016] Alternatively, on-site measurements can be used to narrow down the frequency scanning range. After completing the second step, first determine the frequency scanning range of the "signal detection command," using the following method: A. The detonator sends a “frequency setting command” and a “communication frequency confirmation command” sequentially to the wireless electronic detonator in the blast hole at frequency f1. B. If, after receiving the "frequency setting command", the wireless electronic detonator starts the internal timer, and before the internal timer finishes counting down, the wireless electronic detonator receives the "communication frequency confirmation command", it means that frequency f1 can be set successfully, and it replies with a frequency confirmation success signal to the detonator; if the wireless electronic detonator does not receive the "frequency setting command" sent by the detonator or does not receive the "communication frequency confirmation command" before the internal timer finishes counting down, it means that frequency f1 cannot be set successfully. C. After the detonator sends the "communication frequency confirmation command", it waits for the wireless electronic detonator to reply. If the detonator receives a reply signal from the wireless electronic detonator, it means that frequency f1 can be successfully confirmed. If the detonator does not receive a reply signal from the wireless electronic detonator, it means that frequency f1 cannot be successfully confirmed. D. If frequency f1 can be successfully set in step B and frequency f1 confirmation is also successful in step C, then frequency f1 is selected as the communication frequency of the narrowed scanning frequency range; otherwise, frequency f1 is excluded. E. The initiator sequentially delivers frequencies from f2 to f... n The system sequentially sends "frequency setting command" and "communication frequency confirmation command" to the wireless electronic detonator in the blast hole; steps B to D are repeated to filter out the narrowed scanning frequency range, and steps three to five are performed using this narrowed scanning frequency range to obtain the preferred communication frequency f. 优选 .

[0017] Select 3-5 blasting holes on the blasting face and measure the preferred communication frequency for each hole. Add up the obtained preferred communication frequency values ​​and average them to obtain the average communication frequency value. Use the average communication frequency value as the detonation communication frequency of each wireless electronic detonator in the hole on the blasting face.

Claims

1. A method for determining the preferred communication frequency between a fully-entered wireless electronic detonator and a detonator, comprising a detonator, a wireless electronic detonator, and a blast hole on a blasting face; the design frequency range for wireless signal communication between the detonator and the wireless electronic detonator is f0-f n The wireless electronic detonator is equipped with a frequency signal reception strength calculation module, and the detonator is also equipped with a frequency signal reception strength calculation module. Its characteristics include the following steps: The first step is to set up an experimental platform in the laboratory. The experimental platform consists of a wireless signal generator, a wireless signal attenuator, counter A, and counter B. Connect the wireless signal generator to the wireless signal attenuator and counter A respectively. The wireless signal generator then operates at frequencies ranging from f0 to f1. n Each communication frequency f is used as a test frequency, and wireless test signals are transmitted to the detonator and the wireless electronic detonator respectively through a wireless signal attenuator. A frequency signal reception strength calculation module in the wireless electronic detonator records the reception strength of each test frequency signal, and a frequency signal reception strength calculation module in the detonator also records the reception strength of each test frequency signal. Based on the above data, the wireless signal reception success rate P of the detonator is plotted. 主 The curve and the wireless signal reception success rate P of the wireless electronic detonator 从 A curve graph; The second step is to set the communication frequency of both the detonator and the wireless electronic detonator to f0 at the blasting site, insert the wireless electronic detonator into a blasting hole on the blasting face in a full-hole manner, and set the detonator to the detonation operation position. The third step involves the detonator sending a "signal detection command" to the wireless electronic detonator at frequency f0. If the wireless electronic detonator in the hole receives the "signal detection command," the received signal strength RSSI is calculated. 从 And will receive the signal command and calculate the received signal strength RSSI 从 The system sends a response to the detonator; upon receiving the response signal from the wireless electronic detonator, the detonator calculates the received signal strength (RSSI) of the response signal. 主 Thus, the first set of handshake signals and their received signal strength data (f0, RSSI) are obtained. 从 RSSI 主 ); Step 4: The detonators operate at frequencies f1-f n Send a "signal detection command" to the wireless electronic detonator, and repeat step three to obtain signal strength data (f1, RSSI) at different frequencies. 从 RSSI 主 )-(f n RSSI 从 RSSI 主 ); Step 5: The success rate P of the detonator's wireless signal reception obtained in Step 1. 主 In the curve graph, find the RSSI of each group of data in steps three and four. 主 and RSSI 从 The corresponding wireless signal reception success rate P of the detonator 主 The corresponding values ​​and the wireless signal reception success rate P of the wireless electronic detonator 从 The corresponding value, and the corresponding detonator wireless signal reception success rate P 主 The corresponding value, multiplied by the wireless signal reception success rate P of the wireless electronic detonator. 从 The corresponding value is used to obtain the overall communication success rate P. 总 That is, P 总 =P 主 ×P 从 This allows for further combination to obtain a set of data: (f1, P) 总 )-(f n P 总 In this set of data, select P. 总 The frequency of the data group containing the maximum data value is the preferred communication frequency f. 优选 .

2. The method for determining the preferred communication frequency between a fully-access wireless electronic detonator and an initiator according to claim 1, characterized in that, The success rate P of wireless signal reception of the detonator in the first step. 主 The graph shows the success rate of wireless signal reception P of the wireless electronic detonator. 从 The method for obtaining the curve is as follows: First, connect counter B to the detonator. Set the attenuation setting of the wireless signal attenuator to 100%. The wireless signal generator continuously emits a wireless test signal at frequency f to the wireless signal attenuator. Simultaneously, counter A counts the number of test signals emitted by the wireless signal generator (M). The continuously emitted wireless test signal at frequency f is transmitted to the detonator after passing through the wireless signal attenuator. Counter B counts the number of wireless signals received by the detonator (Q). At the same time, the frequency signal reception strength calculation module in the detonator calculates the received wireless signal strength RSSI1. Divide the number of wireless signals received in counter B (Q) by the number of test signals emitted in counter A (M) to obtain the wireless signal reception success rate P1 of the detonator, and obtain the first set of data (RSSI1, P1). By sequentially decreasing the attenuation level of the wireless signal attenuator and repeating the above steps, multiple sets of data (RSSI) can be obtained. N P N Based on this data, a plot was created with the horizontal axis representing the Received Radio Signal Strength (RSSI) and the vertical axis representing the success rate (P) of the detonator's radio signal reception. 主 A curve graph; On the aforementioned test platform, the wireless electronic detonator was used instead of the initiator, and the above steps were repeated to obtain the wireless signal reception success rate P of the wireless electronic detonator. 从 The curve graph.

3. The method for determining the preferred communication frequency between a fully-access wireless electronic detonator and an initiator according to claim 1 or 2, characterized in that, After completing the first step, determine the frequency scanning range of the "signal detection command". The specific method is as follows: insert the wireless electronic detonator into a metal sleeve, and use the detonator to sequentially emit frequencies ranging from f0 to f10 towards the wireless electronic detonator in the metal sleeve. n The wireless electronic detonator receives the wireless signal and replies it to the detonator, using a frequency range of f0-f. n The wireless signals that the wireless electronic detonator cannot receive are removed from the wireless signals, thereby narrowing the scanning frequency range. Then, the second and subsequent steps are performed based on the narrowed scanning frequency range.

4. The method for determining the preferred communication frequency between a fully-access wireless electronic detonator and an initiator according to claim 1 or 2, characterized in that, After completing the second step, first determine the frequency scanning range of the "signal detection command". The specific method is as follows: A. The detonator sends "frequency setting command" and "communication frequency confirmation command" sequentially to the wireless electronic detonator in the blast hole at frequency f1. B. If, after receiving the "frequency setting command", the wireless electronic detonator starts the internal timer, and before the internal timer finishes counting down, the wireless electronic detonator receives the "communication frequency confirmation command", it means that frequency f1 can be set successfully, and sends a frequency confirmation success signal back to the detonator; if the wireless electronic detonator does not receive the "frequency setting command" sent by the detonator or does not receive the "communication frequency confirmation command" before the internal timer finishes counting down, it means that frequency f1 cannot be set successfully. C. After the detonator sends the "communication frequency confirmation command", it waits for the wireless electronic detonator to reply. If the detonator receives a reply signal from the wireless electronic detonator, it means that frequency f1 can be successfully confirmed. If the detonator does not receive a reply signal from the wireless electronic detonator, it means that frequency f1 cannot be successfully confirmed. D. If frequency f1 can be successfully set in step B and frequency f1 confirmation is also successful in step C, then frequency f1 is selected as the communication frequency of the narrowed scanning frequency range; otherwise, frequency f1 is excluded. E. The initiator sequentially delivers frequencies from f2 to f... n The system sequentially sends "frequency setting command" and "communication frequency confirmation command" to the wireless electronic detonator in the blast hole; steps B to D are repeated to filter out the narrowed scanning frequency range, and steps three to five are performed using this narrowed scanning frequency range to obtain the preferred communication frequency f. 优选 .

5. A method for determining the preferred communication frequency between a fully-access wireless electronic detonator and an initiator according to claim 1 or 2, characterized in that, Select 3-5 blasting holes on the blasting face and measure the preferred communication frequency for each hole. Add up the obtained preferred communication frequency values ​​and average them to obtain the average communication frequency value. Use the average communication frequency value as the detonation communication frequency of each wireless electronic detonator in the hole on the blasting face.

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