Networking evaluation device and networking test method for coal mine allowable digital electronic detonators

Abstract

The invention relates to the technical field of allowable digital electronic detonators, in particular to a coal mine allowable digital electronic detonator networking evaluation device and a networking test method. N parallel branches are arranged between the two buses, and each parallel branch is provided with a coal mine allowable digital electronic detonator. And an (n + 2) th parallel branch is also arranged between the two buses, and a resistor is arranged on the parallel branch. An ignition voltage detection module is arranged on the coal mine allowable digital electronic detonator; according to the invention, bus wire resistance is simulated through the serial resistor, leakage current is simulated through the parallel resistor, and the ignition element discharge voltage detection module is additionally arranged to simulate the phenomena of ignition and the like, so that the test stage of the coal mine allowable digital electronic detonator is consistent with the actual condition as much as possible, and the networking test of the coal mine allowable digital electronic detonator is optimized; the actual communication signal abnormity phenomenon is simulated, and the accuracy of evaluating the coal mine allowable digital electronic detonator networking test is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of permissible digital electronic detonators, and in particular to a network evaluation device and a network testing method for permissible digital electronic detonators for coal mines. Background Art

[0002] Coal mine digital electronic detonator is a new type of coal mine detonator. At present, the mainstream networking mode of coal mine digital detonator is that the initiator forms an independent network with N parallel coal mine digital detonators through two buses. The network realizes communication and power supply for the N coal mine digital detonators. Figure 1 As shown. Currently, the network test of digital detonators permitted in coal mines is based on Figure 1 The test is conducted under ideal conditions. However, in actual applications, due to the large length of the network bus, the line resistance is large, the wiring harnesses are entangled and there is electromagnetic interference, and there are leakage currents in actual applications. As a result, the current signal flowing through the detonator is significantly disturbed and deviates greatly from the state during the test phase.

[0003] Due to the problems of cumbersome loading and unloading, low testing efficiency and poor accuracy in network testing, the network testing link still restricts the production efficiency of digital detonators used in coal mines. Summary of the Invention

[0004] The object of the present invention is to provide a network evaluation device and a network testing method for digital electronic detonators permitted in coal mines. The present invention simulates bus line resistance by changing the resistance value, simulates leakage current by connecting resistors in parallel, and adds a discharge voltage detection of an ignition element to simulate ignition, so as to make the test stage of digital electronic detonators permitted in coal mines as consistent as possible with the actual situation, thereby optimizing the network test of digital electronic detonators permitted in coal mines and improving the accuracy of the network test of digital electronic detonators permitted in coal mines.

[0005] The purpose of the present invention can be achieved through the following technical solutions: A network evaluation device for electronic detonators permitted in coal mines, comprising a coal mine permitted initiator, n coal mine permitted digital electronic detonators, and buses 1 and 2 respectively connected to the coal mine permitted initiator; wherein each bus 1 and bus 2 is connected in series with a resistor; N parallel branches are arranged between the two buses, and a digital electronic detonator permitted for coal mines is arranged on each parallel branch.

[0006] An n+2th parallel branch is also provided between the two buses, and a resistor is provided on the parallel branch.

[0007] An ignition voltage detection module is provided on the digital electronic detonator permitted for use in coal mines.

[0008] As a further solution of the present invention: the ignition voltage detection module includes: Voltage acquisition submodule: obtains the detection voltage of the electronic detonator network permitted in coal mines during the ignition voltage detection process; Voltage analysis submodule: Based on the detected voltage, draw the voltage fluctuation curve, perform waveform analysis on the voltage fluctuation curve, and obtain the trend influence coefficient and the proximity influence coefficient; comprehensively analyze the trend influence coefficient and the proximity influence coefficient to obtain the abnormal assessment value; Abnormal evaluation submodule: obtains abnormal evaluation value, compares the abnormal evaluation value with the threshold, and generates corresponding status feedback signal of electronic detonator allowed for coal mine. The status feedback signal includes electronic detonator abnormal signal or electronic detonator normal signal.

[0009] As a further solution of the present invention: the analysis process of the trend influence coefficient is: It is obtained by multiplying the detection voltage deviation ratio and the detection slope deviation ratio.

[0010] As a further solution of the present invention: the process of obtaining the detection voltage deviation ratio is: The absolute difference between the voltage fluctuation curve of the same timestamp and the voltage corresponding to the node of the preset voltage fluctuation curve is calculated to obtain the voltage deviation, and the voltage deviation is ratio-processed with the voltage corresponding to the node of the preset voltage fluctuation curve to obtain the node voltage deviation ratio; then all the node voltage deviation ratios are averaged to obtain the detection voltage deviation ratio.

[0011] As a further solution of the present invention: the process of obtaining the detection slope deviation ratio is: The absolute difference between the voltage fluctuation curve of the same timestamp and the slope corresponding to the node of the preset voltage fluctuation curve is calculated to obtain the slope deviation, and the slope deviation is ratioed with the slope corresponding to the node of the preset voltage fluctuation curve to obtain the node slope deviation ratio; then all the node slope deviation ratios are averaged to obtain the detection slope deviation ratio.

[0012] As a further solution of the present invention: the analysis process of the proximity influence coefficient is: It is obtained by multiplying the ratio of the time degree of unqualified detonation and the ratio of the ignition voltage deviation.

[0013] As a further solution of the present invention, the process of obtaining the detonation failure time degree ratio is as follows: All the unqualified detonation time differences are averaged to obtain the unqualified detonation time difference mean, and then the unqualified detonation time difference mean is compared with the time range length of the preset ignition voltage to obtain the unqualified detonation time degree ratio.

[0014] As a further solution of the present invention: the process of obtaining the ignition voltage deviation ratio is: The absolute difference between all voltage approximations and the preset ignition voltage is calculated to obtain the voltage ignition deviation, and the voltage ignition deviation is ratioed with the preset ignition voltage to obtain the ignition voltage deviation ratio; then all ignition voltage deviation ratios are averaged to obtain the ignition voltage deviation ratio.

[0015] As a further solution of the present invention: if the abnormality evaluation value is greater than or equal to the abnormality evaluation threshold, an electronic detonator abnormality signal is generated; If the abnormality assessment value is less than the abnormality assessment threshold, a normal signal of the electronic detonator is generated.

[0016] A method for testing a network of electronic detonators permitted for use in coal mines, comprising the following steps: S1. Obtain the bus line resistance, ignition voltage, and leakage current of the actual digital detonator network evaluation device. S2, adjust the resistance values ​​of the bus lines 1 and 2 to achieve the desired bus line resistance: S3. Adjust the resistance of the n+2th parallel branch to achieve the obtained bus leakage current: S4. Adjust the ignition voltage detection input value to reach the obtained ignition voltage: S5. In this case, the digital electronic detonators permitted for use in coal mines are tested.

[0017] Beneficial effects of the present invention: The purpose of the present invention is to provide a network evaluation device and a network testing method for digital electronic detonators permitted in coal mines. The device simulates bus line resistance through series resistors, simulates leakage current through parallel resistors, and adds an ignition element discharge voltage detection module to simulate ignition and other phenomena, so that the test stage of digital electronic detonators permitted in coal mines is as consistent as possible with the actual situation, thereby optimizing the network test of digital electronic detonators permitted in coal mines, simulating actual communication signal abnormalities, and improving the accuracy of evaluating the network test of digital electronic detonators permitted in coal mines. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a schematic diagram of a network evaluation device for permissible digital detonators in coal mines provided by the second embodiment of the present invention; Figure 2 This is a schematic diagram of ignition voltage detection of a digital detonator networking evaluation device provided in Example 3 of the present invention. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the solutions of the present invention, 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 embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention. Example 1

[0021] like Figure 1-2 As shown, an embodiment of the present invention provides a network evaluation device for electronic detonators for use in coal mines, which specifically includes a coal mine permitted initiator, n coal mine permitted digital electronic detonators, and buses 1 and 2 respectively connected to the coal mine permitted initiator; wherein, a resistor is connected in series to each of buses 1 and 2; N parallel branches are arranged between the two buses, and a digital electronic detonator permitted for coal mines is arranged on each parallel branch.

[0022] An n+2th parallel branch is also provided between the two buses, and a resistor is provided on the parallel branch.

[0023] An ignition voltage detection module is provided on the digital electronic detonator permitted for use in coal mines.

[0024] In more detail, the ignition voltage detection module includes: Voltage acquisition submodule: obtains the detection voltage of the electronic detonator network permitted in coal mines during the ignition voltage detection process; In some implementation schemes, the detection voltage of the electronic detonator network permitted for coal mines during the ignition voltage detection process is obtained, and at the same time, a real-time voltage timestamp is obtained by synchronizing the detonator or setting a high-precision clock internally; Voltage analysis submodule: Based on the detected voltage, draw the voltage fluctuation curve, perform waveform analysis on the voltage fluctuation curve, and obtain the trend influence coefficient and the proximity influence coefficient; comprehensively analyze the trend influence coefficient and the proximity influence coefficient to obtain the abnormal assessment value; In some implementation schemes, the detection voltage and the corresponding timestamp of the electronic detonator network permitted for coal mines during the ignition voltage detection process are obtained, and a voltage fluctuation curve is obtained by least squares fitting; Compare the fitted voltage fluctuation curve with the preset voltage fluctuation curve to obtain the trend influence coefficient and the proximity influence coefficient; The trend influence coefficient and the proximity influence coefficient are obtained, and the abnormal assessment value is calculated through the weight formula, where the weight factors of the trend influence coefficient and the proximity influence coefficient are 0.536 and 0.454 respectively; First, illustratively, the analysis process of the trend influence coefficient is: Obtain a voltage fluctuation curve and a preset voltage fluctuation curve, calculate the absolute difference between the voltage fluctuation curve with the same timestamp and the voltage corresponding to the node of the preset voltage fluctuation curve to obtain a voltage deviation, perform ratio processing on the voltage deviation and the voltage corresponding to the node of the preset voltage fluctuation curve to obtain a node voltage deviation ratio; then perform average processing on all node voltage deviation ratios to obtain a detection voltage deviation ratio; Obtain a voltage fluctuation curve and a preset voltage fluctuation curve, calculate the absolute difference between the voltage fluctuation curve with the same timestamp and the slope corresponding to the node of the preset voltage fluctuation curve to obtain a slope deviation, perform ratio processing on the slope deviation and the slope corresponding to the node of the preset voltage fluctuation curve to obtain a node slope deviation ratio; then perform average processing on all node slope deviation ratios to obtain a detection slope deviation ratio; The trend influence coefficient is obtained by multiplying the detection voltage deviation ratio and the detection slope deviation ratio; Second, the analysis process of the proximity influence coefficient is as follows: Obtain the voltage values ​​of all nodes of the voltage fluctuation curve, calculate the absolute difference between the voltage value and the preset ignition voltage, and obtain the voltage approach judgment value; Comparing the voltage proximity judgment value with a preset voltage proximity judgment value; If the voltage proximity judgment value is less than or equal to the preset voltage proximity judgment value, the node is marked as a proximity node, and the voltage corresponding to the proximity node is marked as the voltage proximity value; If the voltage proximity judgment value is greater than the preset voltage proximity judgment value, the node is marked as a non-proximity node, and the voltage corresponding to the non-proximity node is marked as a non-voltage proximity value; Get the timestamps of all approaching nodes and compare them with the preset time range of the firing voltage; If the timestamp of the approaching node is within the preset time range of the ignition voltage, the approaching node is marked as a qualified node for detonation; If the timestamp of the approaching node is not within the preset time range of the ignition voltage, the approaching node is marked as a node that fails to ignite; Obtain the difference between the timestamp of the node with failed detonation and the closest endpoint of the time range of the preset ignition voltage to obtain the failed detonation time difference; All the unqualified detonation time differences are averaged to obtain the unqualified detonation time difference average, and then the unqualified detonation time difference average is compared with the time range length of the preset ignition voltage to obtain the unqualified detonation time degree ratio; Calculate the absolute difference between all voltage approximations and the preset ignition voltage to obtain the voltage ignition deviation, perform ratio processing on the voltage ignition deviation and the preset ignition voltage to obtain the ignition voltage deviation ratio; then perform mean processing on all ignition voltage deviation ratios to obtain the ignition voltage deviation ratio; The influencing coefficient is obtained by multiplying the ratio of the time degree of the unqualified detonation and the ratio of the ignition voltage deviation. Abnormality assessment submodule: obtains abnormality assessment value, compares the abnormality assessment value with the threshold value, and generates corresponding status feedback signal of electronic detonators allowed in coal mines. The status feedback signal includes electronic detonator abnormality signal or electronic detonator normal signal; In some embodiments, obtaining an abnormality assessment value of a voltage analysis module, and comparing the abnormality assessment value with an abnormality assessment threshold; If the abnormality assessment value is greater than or equal to the abnormality assessment threshold, an electronic detonator abnormality signal is generated; If the abnormality assessment value is less than the abnormality assessment threshold, a normal signal of the electronic detonator is generated; The technical solution in the embodiments of the present invention includes: a voltage acquisition module for acquiring the detection voltage of a network of electronic detonators permitted in coal mines during the ignition voltage detection process; a voltage analysis module for plotting a voltage fluctuation curve based on the detection voltage, performing waveform analysis on the voltage fluctuation curve to obtain a trend influence coefficient and a proximity influence coefficient; and a comprehensive analysis of the trend influence coefficient and the proximity influence coefficient to obtain an anomaly assessment value. An anomaly assessment module for acquiring the anomaly assessment value, comparing the anomaly assessment value with a threshold, and correspondingly generating a state feedback signal for the electronic detonators permitted in coal mines, the state feedback signal including an electronic detonator abnormality signal or an electronic detonator normal signal. The present invention uses a high-precision clock or initiator to synchronously record voltage timestamps to achieve millisecond-level voltage fluctuation tracking and accurately capture transient anomalies. The voltage deviation ratio detects steady-state deviations, and the slope deviation ratio captures trend anomalies. The product of the two is used to operationally amplify composite fault characteristics, enabling more sensitive identification of hidden risks. Combining the voltage proximity value with timing compliance (such as the mean time difference of unqualified detonation), the present invention addresses the blind spot problem of "voltage compliance but timing errors" in traditional detection. The present invention effectively reduces the risk of misfire / premature explosion through multi-dimensional anomaly capture. Example 2

[0025] This embodiment provides a method for testing the network of digital electronic detonators permitted in coal mines. Based on the network evaluation device for digital electronic detonators permitted in coal mines in Example 1, the network of digital electronic detonators permitted in coal mines is tested. The specific implementation process is as follows: S1. Obtain the bus line resistance, ignition voltage, and leakage current of the actual digital detonator network evaluation device. S2, adjust the resistance values ​​of the bus lines 1 and 2 to achieve the desired bus line resistance: S3. Adjust the resistance of the n+2th parallel branch to achieve the obtained bus leakage current: S4. Adjust the ignition voltage detection input value to reach the obtained ignition voltage: S5. In this case, the digital electronic detonators permitted for use in coal mines are tested.

[0026] It should be noted that the lead resistance, ignition voltage, and leakage current can be obtained from actual measurements or empirical values, or calculated using the following formula: The ignition threshold voltage calculation formula is: VOUT = (1 + R1 / R2) * VREF.

[0027] Example 1 This embodiment provides a method for testing the network of digital electronic detonators permitted in coal mines. Based on the network evaluation device for digital electronic detonators permitted in coal mines in Example 1, the method is used to simulate an ambient temperature of 25°C, use a 1000m copper core lead as the network bus to build the network evaluation device for digital electronic detonators permitted in coal mines, and test the network of digital electronic detonators permitted in coal mines. The specific implementation process is as follows: At an ambient temperature of 25°C, a 1000m copper core lead wire was used as the network bus to build a coal mine permissible digital electronic detonator network evaluation device. The measured lead wire resistance was 45Ω, and the lead wire had a leakage current of 30mA. The test process is as follows: S1, adjust the resistance of the resistors on bus 1 and 2 to 45Ω to simulate the network bus line resistance; S2, adjust the parallel resistor to make the bus leakage current 30mA to simulate the network bus leakage current; S3, by adjusting the ignition voltage detection, is used to simulate the ignition of digital electronic detonators permitted in coal mines.

[0028] S4. In this case, the digital electronic detonators permitted for use in coal mines are tested.

[0029] The above is a detailed description of an embodiment of the present invention. However, the content described is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A network evaluation device for electronic detonators permissible for coal mines, characterized in that: It includes a coal mine permitted initiator, n coal mine permitted digital electronic detonators, and bus 1 and bus 2 respectively connected to the coal mine permitted initiator; wherein, bus 1 and bus 2 are each connected in series with a resistor; There are n parallel branches between the two buses, and each parallel branch is equipped with a digital electronic detonator permitted for coal mines; There is also an n+2th parallel branch between the two buses, and a resistor is set on the parallel branch; An ignition voltage detection module is provided on the digital electronic detonator permitted for use in coal mines.

2. A coal mine permissible electronic detonator network evaluation device according to claim 1, characterized in that: The ignition voltage detection module includes: Voltage acquisition submodule: obtains the detection voltage of the electronic detonator network permitted in coal mines during the ignition voltage detection process; Voltage analysis submodule: Based on the detected voltage, draw the voltage fluctuation curve, perform waveform analysis on the voltage fluctuation curve, and obtain the trend influence coefficient and the proximity influence coefficient; comprehensively analyze the trend influence coefficient and the proximity influence coefficient to obtain the abnormal assessment value; Abnormal evaluation submodule: obtains abnormal evaluation value, compares the abnormal evaluation value with the threshold, and generates corresponding status feedback signal of electronic detonator allowed for coal mine. The status feedback signal includes electronic detonator abnormal signal or electronic detonator normal signal.

3. A coal mine permissible electronic detonator network evaluation device according to claim 2, characterized in that: The analysis process of the trend impact coefficient is: It is obtained by multiplying the detection voltage deviation ratio and the detection slope deviation ratio.

4. A coal mine permissible electronic detonator network evaluation device according to claim 3, characterized in that: The process of obtaining the detection voltage deviation ratio is: The absolute difference between the voltage fluctuation curve of the same timestamp and the voltage corresponding to the node of the preset voltage fluctuation curve is calculated to obtain the voltage deviation, and the voltage deviation is ratio-processed with the voltage corresponding to the node of the preset voltage fluctuation curve to obtain the node voltage deviation ratio; then all the node voltage deviation ratios are averaged to obtain the detection voltage deviation ratio.

5. The network evaluation device for electronic detonators for coal mines according to claim 3 is characterized in that: The process of obtaining the detection slope deviation ratio is: The absolute difference between the voltage fluctuation curve of the same timestamp and the slope corresponding to the node of the preset voltage fluctuation curve is calculated to obtain the slope deviation, and the slope deviation is ratioed with the slope corresponding to the node of the preset voltage fluctuation curve to obtain the node slope deviation ratio; then all the node slope deviation ratios are averaged to obtain the detection slope deviation ratio.

6. A coal mine permissible electronic detonator network evaluation device according to claim 1, characterized in that: The analysis process of the proximity influence coefficient is: It is obtained by multiplying the ratio of the time degree of unqualified detonation and the ratio of the ignition voltage deviation.

7. A coal mine permissible electronic detonator network evaluation device according to claim 6, characterized in that: The process of obtaining the detonation failure time degree ratio is as follows: All the unqualified detonation time differences are averaged to obtain the unqualified detonation time difference mean, and then the unqualified detonation time difference mean is compared with the time range length of the preset ignition voltage to obtain the unqualified detonation time degree ratio.

8. A coal mine permissible electronic detonator network evaluation device according to claim 6, characterized in that: The process of obtaining the ignition voltage deviation ratio is: The absolute difference between all voltage approximations and the preset ignition voltage is calculated to obtain the voltage ignition deviation, and the voltage ignition deviation is ratioed with the preset ignition voltage to obtain the ignition voltage deviation ratio; then all ignition voltage deviation ratios are averaged to obtain the ignition voltage deviation ratio.

9. The network evaluation device for electronic detonators for coal mines according to claim 1, characterized in that: If the abnormality assessment value is greater than or equal to the abnormality assessment threshold, an electronic detonator abnormality signal is generated; If the abnormality assessment value is less than the abnormality assessment threshold, a normal signal of the electronic detonator is generated.

10. A method for testing the network of electronic detonators permitted in coal mines, characterized in that: The following steps are involved: S1. Obtain the bus line resistance, ignition voltage, and leakage current of the actual digital detonator network evaluation device. S2, adjust the resistance values ​​of the bus lines 1 and 2 to achieve the desired bus line resistance: S3. Adjust the resistance of the n+2th parallel branch to achieve the obtained bus leakage current: S4. Adjust the ignition voltage detection input value to reach the obtained ignition voltage: S5. In this case, the digital electronic detonators permitted for use in coal mines are tested.

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