Online circuit testing method

Abstract

The invention relates to the technical field of circuit testing, and particularly discloses an online circuit testing method which comprises the following steps: starting communication control, issuing an electric signal to a detonator by a microprocessor through a communication circuit, releasing ignition capacitance energy by the detonator, presetting low and high voltage to measure the current of the detonator, adjusting a gun line voltage difference value, starting a current detection circuit, and closing an ignition and communication circuit. Analyzing and controlling branch states (normal, short circuit and open circuit) and reporting the states to a controller, considering the influence of distributed parameters to judge the short circuit state of the system, reporting circuit damage to a microprocessor based on damage signals, closing related enabling of the system at the same time, and forbidding detonating and discharging of detonators; comparing with a rated current to generate an analysis signal, calculating an early warning coefficient, calculating a high-risk coefficient based on the high-risk analysis signal, drawing a curve, dividing detonator risk levels, and taking corresponding measures for detonators with different risk levels.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit testing, and in particular to an online circuit testing method. Background Art

[0002] In the civil explosives industry, long wires are usually used as firing lines to connect a number of electronic delay detonators. The detonator sends signals to each electronic delay detonator through the firing line, and each electronic delay detonator responds to the instructions sent by the detonator according to a specific protocol.

[0003] In order to ensure the safety of blasters, the gun line is generally very long, and 1000 meters is a common length reference value. Due to the difficult conditions at the blasting site and the tight time after the charge is placed, there may be a gun line short circuit when the network is connected for detection. The connection detection using overcurrent detection can exclude general simple gun line short circuits, but it cannot avoid gun line short circuits caused by the explosion. At the moment of the explosion, there is a certain probability that the gun line will be short-circuited instantaneously or permanently. Since ignition is a time period, the ignition high voltage on the gun line always exists during this time period, and the duration exceeds the time when the charge head causes the detonation. If the short circuit occurs in this ignition time period, then after this blasting, the control of the detonator ignition circuit There is a risk of damage to the control branch. Usually, the control branch short circuit is more dangerous. Since the communication circuit is independent of the ignition circuit and has a low operating voltage, it will basically not be damaged. Therefore, when the control branch of the ignition circuit is damaged, regular connection detection can be successfully performed. However, when entering the ready-to-explode state, the ignition circuit starts to work and outputs high voltage to the outside. Since the control branch of the ignition circuit is damaged, the ignition high voltage will be transmitted to the detonator along the damaged control branch when the ignition circuit is started, causing premature explosion. Premature explosion will affect the blasting effect and even threaten the lives of workers. Therefore, it is necessary to conduct online inspection of the ignition control branch to reduce premature explosion accidents and reduce risks.

[0004] To this end, the present invention provides an online circuit testing method. Summary of the invention

[0005] The purpose of the present invention is to provide an online circuit testing method to solve the above background problems.

[0006] The purpose of the present invention can be achieved by the following technical solution: An online circuit testing method, comprising:

[0007] S1, starting the communication control Ct l, the microprocessor circuit (40) sends a discharge signal to the detonator (50) through the communication circuit (10), and after the detonator (50) receives the discharge signal, the detonator (50) releases the voltage energy of the ignition capacitor;

[0008] S2, preset a low voltage to measure the working current of the detonator (50) and mark it as I OLV, adjusting the voltage values ​​of the firing lines A and B, setting the voltage difference between the firing lines A and B to a set target low voltage value and marking it as LV, starting the current detection circuit (20) to detect the working current I of the detonator (50) OLV ;

[0009] S3, preset a high voltage to measure the working current of the detonator (50) and mark it as I OHV , keep the low voltage LV value set by the communication circuit (10) unchanged, start the ignition circuit (30) through the high voltage enable En1 to output the set high voltage value and mark it as HV, and after the set high voltage HV reaches the set value, start the current detection circuit (20) again to detect the working current I of the detonator (50) OHV；

[0010] S4, close the ignition circuit (30) and the communication circuit (10), and preset the control circuit branch state into normal, short circuit, and open circuit states. Based on the three preset circuit states, combined with the ignition circuit high voltage HV and the high voltage measured I OLV , a low voltage LV output by the communication circuit (10), and an I obtained by measuring the low voltage OHV Detonator working current, specifically analyze the state of the control circuit branch, and report the state of the control circuit branch to the microcontroller MCU to shut down the damaged system in time;

[0011] Considering the influence of distributed parameters, the current threshold I is set TH2 Half the operating current of a single detonator;

[0012] When I OHV OLV -I TH2 When the control branch is short-circuited, a control branch damage signal is generated. After receiving the control branch damage signal, the microprocessor MCU reports the circuit damage to the system.

[0013] S5, based on the control branch damage signal, the microprocessor MCU reports the circuit damage to the system. The system prohibits the detonator from detonating and discharging by turning off the ignition enable En2 and high-voltage enable En1. At the same time, even if the MCU receives a charging instruction, it will not perform a charging action to ensure circuit safety.

[0014] As a further technical solution of the present invention: the method for judging the damaged state of the control branch is as follows:

[0015] If the control branch is short-circuited, even if the ignition enable En2 is not turned on, the high voltage HV output by the ignition circuit (30) will be transmitted to the gun line A. Since the high voltage HV output by the ignition circuit (30) is greater than the low voltage LV output by the communication circuit (10), the current I measured when the ignition circuit (30) is turned on is OHV will not include the detonator's operating current, i.e., I​OHV OLV ;

[0016] Among them, the detonator current I obtained by low voltage measurement OLV The detonator current I obtained by measuring the high voltage OHV The two current reductions are at least the working current I of a detonator J ;

[0017] Considering the influence of distributed parameters, the current threshold I is set TH2 It is 1 / 5 to 4 / 5 of the working current of a single detonator. TH1 The value is generally much smaller than the working current of a single detonator. Obviously, I TH2 >I TH1 ;

[0018] Preferably, That is, it is set to half the operating current of a single detonator;

[0019] When I OHV OLV -I TH2 When the control branch is short-circuited, a control branch damage signal is generated. After receiving the control branch damage signal, the microprocessor MCU reports the circuit damage to the system.

[0020] If the control branch is open, the current I measured when the ignition circuit (30) is turned on OHV The current remains unchanged, but the ignition voltage cannot be transmitted to the detonator (50) during detonation, and the detonator needs to be replaced.

[0021] As a further technical solution of the present invention: the method for judging whether the control branch is normal is as follows:

[0022] If the control branch is normal, since the ignition enable En2 is not turned on, the high voltage HV output by the start-up ignition circuit (30) cannot be transmitted to the firing line A, and the detonator current I obtained by low voltage measurement is obtained. OHV The detonator current I obtained by measuring the high voltage OLV The smaller measurement error value is marked as I TH1 ;

[0023] If I TH1 Much smaller than the normal operating current I of a single detonator J , at this time the control circuit branch is in normal state.

[0024] As a further technical solution of the present invention: the processing method of the control branch opening is as follows:

[0025] If the control branch is open, the current I measured when the ignition circuit (30) is turned on OHV ​​The current remains unchanged, but the ignition voltage cannot be transmitted to the detonator (50) during detonation, and the detonator needs to be replaced.

[0026] As a further technical solution of the present invention: a method for testing an online circuit also includes:

[0027] Step 1: Monitor the working current I of a single detonator under normal working voltage within a detonation cycle T. J , J = 1, 2, ..., n, n is the number of detonators, and is compared with the rated working current H, and an abnormal analysis signal and a normal working signal are generated according to the comparison result;

[0028] If the working current of the detonator I J > Rated working current H of detonator, generating abnormal analysis signal;

[0029] If the working current of the detonator I J ≤ the rated working current H of the detonator, generating a normal working signal;

[0030] Step 2: Based on the abnormal analysis signal, the detonator working current warning coefficient Xs is calculated, and the working abnormality signal and the high-risk analysis signal are obtained by comparing the detonator working current warning coefficient Xs with the current warning coefficient threshold Yz;

[0031] Step 3: Based on the high-risk analysis signal, the working current warning coefficient Xs of the detonator, the working current warning coefficient Gy obtained by high-voltage measurement, and the working current warning coefficient Dy obtained by low-voltage measurement are calculated to obtain the high-risk coefficient Gw of the detonator;

[0032] Step 4: Draw a cycle-high risk factor variation curve based on the high risk factor Gw, obtain the detonator risk level value Dj according to the variation curve, and divide the detonator risk level into low risk and medium-high risk according to the detonator risk level value Dj.

[0033] As a further technical solution of the present invention: the high-risk analysis signal is generated in the following manner:

[0034] By formula: Obtain the detonator's working current warning coefficient Xs, where a1 and a2 are preset proportional coefficients;

[0035] Obtaining a working current warning coefficient Xs of the detonator, and comparing the working current warning coefficient Xs with a working current warning coefficient threshold value Yz;

[0036] If Xs ≥ Yz, it indicates that the abnormal working current of the detonator exceeds the warning value, and a working abnormality signal is generated to report the abnormal state of the detonator to the microcontroller MCU;

[0037] If Xs < Yz, the operating current of the surface detonator is abnormally not exceeding the warning value, but the detonator is in a high-risk working environment, generating a high-risk analysis signal.

[0038] As a further technical solution of the present invention: the obtaining methods of the operating current difference ratio Cz and the operating times exceeding ratio Cs are as follows:

[0039] Count the number of times the abnormal analysis signal appears when the operating current of the detonator exceeds the rated current for H during a period T, and the number of times the normal working signal appears when the operating current does not exceed the rated current for H, sum to obtain the total number of operations. Ratio process the number of times the abnormal analysis signal appears when the operating current of the detonator exceeds the rated current for H to the total number of operations to obtain the operating times exceeding ratio, and mark it as Cs;

[0040] When the abnormal analysis signal appears, take the operating current I of the detonator J Perform a difference process with the rated operating current H to obtain the operating current difference. Sum and average the operating current differences corresponding to all appearances of the abnormal analysis signal to obtain the average value of the operating current difference. Ratio process the average value of the operating current difference to the rated operating current to obtain the operating current difference ratio, and mark it as Cz.

[0041] As a further technical solution of the present invention: the obtaining method of the high-risk coefficient Gw of the detonator is as follows:

[0042] Based on the operating current warning coefficient Xs of the detonator, the operating current warning coefficient Gy measured under high voltage, and the operating current warning coefficient Dy measured under low voltage, calculate the high-risk coefficient Gw of the detonator in a T period. Specifically:

[0043] Through the formula: Obtain the high-risk coefficient Gw of the detonator, where b1, b2, and b3 are preset proportionality coefficients, and b1, b2, b3 > 0.

[0044] As a further technical solution of the present invention: the obtaining method of the detonator risk level value Dj is as follows:

[0045] Based on the exceeding period ratio Zb and the high-risk difference ratio Cb, calculate the detonator risk level value Dj, and divide the obtained detonator high-risk level into two levels: low risk and high risk;

[0046] Specifically, the obtaining method of the detonator risk level value Dj is as follows:

[0047] Perform a weighted process on the exceeding period ratio Zb and the high-risk difference ratio Cb. Through the weighted process formula: Dj = c1 * Zb + c2 * Cb, where c1 and c2 are preset proportionality coefficients;

[0048] Compare the detonator risk level value Dj with the risk level threshold Fh:

[0049] If the detonator risk level value Dj is less than the risk level threshold Fh, the detonator is marked as low risk, but the detonator status still needs to be continuously detected;

[0050] If the detonator risk level value Dj ≥ risk level threshold Fh, the detonator is marked as high risk, a high risk warning is reported to the microcontroller MCU, and a new detonator is replaced.

[0051] As a further technical solution of the present invention: the method for obtaining the excess period ratio Zb and the high-risk difference ratio Cb is:

[0052] Calculate the high-risk factor Gw value of detonators in multiple periods T, set the period T as the X-axis and the high-risk factor Gw value as the Y-axis, and draw a period-high-risk factor change curve in a two-dimensional rectangular coordinate system;

[0053] The threshold value of the high-risk factor of the detonator is marked as Fx, and a reference line parallel to the X-axis is drawn. The curve segment of the cycle-high-risk factor variation curve that exceeds the reference line is marked as the exceeded curve segment, and the cycle corresponding to the exceeded curve segment on the X-axis is marked as the exceeded cycle. The number of exceeded cycles is counted and the ratio is processed by the total number of cycles to obtain the exceeded cycle ratio Zb;

[0054] Sum and average all the high-risk coefficients Gw corresponding to the curve segment to obtain the high-risk coefficient mean, perform subtraction processing on the high-risk coefficient mean and the high-risk coefficient threshold to obtain the high-risk coefficient difference, and perform ratio processing on the high-risk coefficient threshold to obtain the high-risk difference ratio Cb.

[0055] Beneficial effects of the present invention:

[0056] (1) Monitor the working current I of a single detonator under normal working voltage within a detonation cycle T J , and compared with the rated working current H, to generate abnormal analysis signals and normal working signals. Based on the abnormal analysis signals, the working current warning coefficient Xs is calculated, and the working current I of a single detonator is converted into J The difference and ratio of the rated working current H are processed to obtain the working current difference ratio Cz, and the number of times the working current exceeds the rated current and the total number of times are counted to obtain the working number exceeding ratio Cs. The working current warning coefficient Xs is calculated according to the formula, and it is compared with the current warning coefficient threshold Yz to generate working abnormality signals and high-risk analysis signals. Early warning allows operators to take measures before serious problems occur in detonators, such as further inspection of detonators or adjustment of blasting plans, thereby avoiding blasting accidents such as premature explosions caused by abnormally high working currents of detonators, greatly improving the safety of blasting operations;

[0057] (2) Based on the high-risk analysis signal, the high-risk coefficient Gw is calculated for the working current warning coefficient obtained by measuring normal, high-voltage and low-voltage, and the Gw value of multiple cycles is measured. The cycle-high-risk coefficient change curve is drawn, and the detonator risk level value Dj is calculated according to the change curve. The detonators are divided into low risk and medium-high risk. Low-risk detonators continue to be monitored, and high-risk detonators are reported to the system and replaced. Different measures are taken for detonators of different risk levels. Low-risk detonators are continuously tested, and medium- and high-risk detonators are replaced in time. The hierarchical management method realizes the refined management of detonators, optimizes the resource allocation during the use of detonators, and avoids the general treatment of all detonators. At the same time, it ensures that medium- and high-risk detonators can be replaced in time, further improving the safety and reliability of blasting operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] The present invention will be further described below in conjunction with the accompanying drawings.

[0059] Figure 1 It is a circuit schematic diagram of the present invention;

[0060] Figure 2 is a flow chart of the control circuit testing method of the present invention;

[0061] Figure 3 It is a flow chart of the detonator monitoring method of the present invention. DETAILED DESCRIPTION

[0062] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments 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 creative work are within the scope of protection of the present invention.

[0063] Example 1

[0064] like Figure 1 and Figure 2 As shown, an online circuit detection method according to an embodiment of the present invention comprises the following steps:

[0065] S1, start the communication control Ct l, the microprocessor circuit 40 sends a discharge signal to the detonator 50 through the communication circuit 10, and after the detonator 50 receives the discharge signal, the detonator 50 releases the voltage energy of the ignition capacitor;

[0066] Specifically, the communication circuit 10 is started through the communication control Ct l, and the microprocessor circuit 40 sends a discharge instruction to the input I n of the communication circuit 10. After processing, the communication circuit 10 transmits the low-voltage communication signal to the detonator 50 via the current detection circuit 20, the first anti-reverse diode D1 and the firing line. After the detonator 50 receives the low-voltage communication signal, the detonator 50 performs a discharge action to completely release the voltage energy that may remain on the ignition capacitor in the detonator 50. The discharge time T1 of the ignition capacitor depends on the set time constant of the detonator 50, which is generally 1-10 seconds.

[0067] It should be noted that the function of the reverse diode is to protect the circuit from the influence of reverse voltage. When the detonator performs the discharge action, the residual voltage energy on the ignition capacitor is released, and a transient reverse current may be generated during the discharge process. Secondly, when the circuit components are damaged or connected incorrectly, reverse current may also be generated. When the current flows in reverse to the reverse diode, the unidirectional conduction characteristic of the diode will prevent the reverse current from passing, reducing the possibility of damage to the communication circuit and the ignition circuit, and improving the safety and reliability of the entire system;

[0068] S2, preset a low voltage to measure the working current of the detonator 50 and mark it as I OLV , adjust the voltage values ​​of the gun lines A and B, set the voltage difference between the gun lines A and B to the set target low voltage value and mark it as LV, start the current detection circuit 20 to detect the working current I of the detonator 50 OLV , by measuring the working current I OLV Value, providing a reference for subsequent judgment of the control branch circuit status;

[0069] S3, preset a high voltage to measure the working current of the detonator 50 and mark it as I OHV , keep the low voltage LV value set by the communication circuit 10 unchanged, start the ignition circuit 30 through the high voltage enable En1 to output the set high voltage value and mark it as HV, and after the set high voltage HV reaches the set value, start the current detection circuit 20 again to detect the working current I of the detonator 50 OHV , by measuring the working current I OHV Provide reference data for subsequent judgment of branch circuit status;

[0070] S4, turn off the ignition circuit 30 and the communication circuit 10, and divide the control circuit branch state into normal, short circuit, and open circuit states. Based on the three preset circuit states, combined with the ignition circuit high voltage HV and the high voltage measured I OLV , the low voltage LV output by the communication circuit 10, and the I obtained by measuring the low voltage OHV Detonator working current, specifically analyze the state of the control circuit branch, and report the state of the control circuit branch to the microcontroller MCU to shut down the damaged system in time;

[0071] It should be noted that the ignition circuit 30 is responsible for generating and controlling high-voltage current. After the test of the detonator is completed, the ignition circuit 30 is turned off so that the current generated by the high voltage no longer flows to the detonator, thereby preventing accidental ignition or damage to the detonator, and providing a stable and safe circuit environment for subsequent detection and comparison and judgment work; the communication circuit is responsible for processing and transmitting control signals, including sending instructions from the microprocessor MCU to the ignition circuit and the current detection circuit of the ignition circuit. The communication circuit is turned off so that during the measurement process, the communication circuit will not send or receive new data, thereby reducing the impact on the data that has been collected;

[0072] Specifically, if the control branch is normal, since the ignition enable En2 is not turned on, the high voltage HV output by the start-up ignition circuit 30 cannot be transmitted to the firing line A, and the detonator current I obtained by low voltage measurement is obtained. OHV The detonator current I obtained by measuring the high voltage OLV The smaller measurement error value is marked as I TH1 ;

[0073] If I TH1 Much smaller than the normal operating current I of a single detonator J , at this time, the control circuit branch is in normal state;

[0074] If the control branch is short-circuited, even if the ignition enable En2 is not turned on, the high voltage HV output by the ignition circuit 30 will be transmitted to the gun line A. Since the high voltage HV output by the ignition circuit 30 is greater than the low voltage LV output by the communication circuit 10, the current I measured when the ignition circuit 30 is turned on is OHV will not include the detonator's operating current, i.e., I OHV OLV ;

[0075] Theoretically, the detonator current I obtained by low voltage measurement is OLV The detonator current I obtained by measuring the high voltage OHV The two current reductions are at least the working current I of a detonator J ;

[0076] Considering the influence of distributed parameters, the current threshold I is set TH2 It is 1 / 5 to 4 / 5 of the working current of a single detonator. TH1 The value is generally much smaller than the working current of a single detonator. Obviously, I TH2 >I TH1 ;

[0077] Preferably, That is, it is set to half the operating current of a single detonator;

[0078] When I OHV ​OLV -I TH2 When the control branch is short-circuited, a control branch damage signal is generated. After receiving the control branch damage signal, the microprocessor MCU reports the circuit damage to the system.

[0079] It should be noted that the influence of distributed parameters refers to the fact that in the circuit, due to the distribution characteristics of various components, such as diodes, capacitors, and the physical characteristics of the circuit (length, cross-sectional area), the current, voltage and other parameters in the circuit will have certain differences and fluctuations at different positions and times. TH2 Thresholds are used to reduce the impact of distributed parameters on the circuit and improve the accuracy of judgment;

[0080] If the control branch is open, although the current I measured when the ignition circuit 30 is turned on OHV The current remains unchanged, but the ignition voltage cannot be transmitted to the detonator 50 during detonation, and the detonator needs to be replaced;

[0081] It should be noted that a part of the control circuit branch is disconnected, causing the circuit 30 to be unable to conduct, preventing the ignition voltage high voltage HV from being transmitted from the ignition circuit 30 to the detonator 50. The control circuit branch is open. In the absence of high voltage HV, the detonator 50 is still in the low voltage LV condition, and the low voltage current I measured by the current detection circuit 20 is OLV Remain unchanged, so the detonator 50 cannot be detonated at this time. In order to ensure safe and effective operation, the detonator is replaced so that the system can work normally;

[0082] S5, based on the control branch damage signal, the microprocessor MCU reports the circuit damage to the system, and the system disables the detonator from detonating and discharging by turning off the ignition enable En2 and high-voltage enable En1. At the same time, even if the MCU receives a charging instruction, it does not perform charging action to ensure circuit safety;

[0083] The technical solution described in the embodiment of the present invention is as follows: the communication control Ct l is started, the microprocessor circuit 40 sends a discharge signal to the detonator 50 through the communication circuit 10, and after the detonator 50 receives the discharge signal, the detonator 50 releases the voltage energy of the ignition capacitor, and a high voltage is preset to measure the working current of the detonator 50 and marked as I OHV , preset a high voltage to measure the working current of the detonator 50 and mark it as I OHV , turn off the ignition circuit 30 and the communication circuit 10, and preset the control circuit branch state into normal, short circuit, and open circuit states. If the control branch is normal, since the high voltage HV cannot be transmitted to the gun line A when the ignition enable En2 is not turned on, the detonator current I obtained by low voltage measurement is obtained. OHV The detonator current I obtained by measuring the high voltage OLV If the measurement error value I TH1 ​Much smaller than the normal operating current I of a single detonator J , the control circuit is in normal state. If the control branch is short-circuited, even if the ignition enable En2 is not turned on, the high voltage HV will be transmitted to the gun line A. OHV OLV -I TH2 When the control branch is short-circuited, a control branch damage signal is generated and the circuit damage is reported. If the control branch is open, the current I measured when the ignition circuit is turned on 30 OHV The detonator remains unchanged, but the ignition voltage cannot be transmitted to the detonator 50 during detonation, and the detonator needs to be replaced.

[0084] Embodiment 2,

[0085] like Figure 3 As shown, based on Example 1, an online circuit testing method described in an embodiment of the present invention includes:

[0086] Step 1: Monitor the working current I of a single detonator under normal working voltage within a detonation cycle T. J , J = 1, 2, ..., n, n is the number of detonators, and is compared with the rated working current H, and an abnormal analysis signal and a normal working signal are generated according to the comparison result;

[0087] If the working current of the detonator I J > Rated working current H of detonator, generating abnormal analysis signal;

[0088] If the working current of the detonator I J ≤ the rated working current H of the detonator, generating a normal working signal;

[0089] Step 2: Based on the abnormal analysis signal, the detonator working current warning coefficient Xs is calculated, and the working abnormality signal and the high-risk analysis signal are obtained by comparing the detonator working current warning coefficient Xs with the current warning coefficient threshold Yz;

[0090] Count the number of abnormal analysis signals that appear when the working current of the detonator exceeds the rated current working H and the number of normal working signals that appear when the working current does not exceed the rated current working H within a period T, and sum them up to get the total number of working times. Ratio the number of abnormal analysis signals that appear when the working current of the detonator exceeds the rated current working H to the total number of working times to get the working times excess ratio, which is marked as Cs.

[0091] When the abnormal analysis signal appears, the detonator working current I J ​Perform a difference operation with the rated working current H to obtain the working current difference. Sum up the working current differences corresponding to all abnormal analysis signals and take the average value to obtain the average working current difference. Perform a ratio operation on the average working current difference and the rated working current to obtain the working current difference ratio, and mark it as Cz.

[0092] Calculate the working current warning coefficient Xs of the detonator according to the working current difference ratio Cz and the working times exceedance ratio Cs.

[0093] Through the formula: Obtain the working current warning coefficient Xs of the detonator, where a1 and a2 are preset proportionality coefficients.

[0094] Obtain the working current warning coefficient Xs of the detonator, and compare the working current warning coefficient Xs with the working current warning coefficient threshold Yz.

[0095] If Xs≥Yz, it indicates that the abnormal situation of the working current of the detonator exceeds the warning value, generate a working abnormal signal, and report the abnormal state of the detonator to the microcontroller MCU.

[0096] If Xs<Yz, it indicates that the abnormal working current of the detonator does not exceed the warning value, but the detonator is in a high-risk working environment, generate a high-risk analysis signal.

[0097] Step 3: Based on the high-risk analysis signal, calculate the working current warning coefficient Xs of the detonator, the working current warning coefficient Gy obtained by high-voltage measurement, and the working current warning coefficient Dy obtained by low-voltage measurement to obtain the high-risk coefficient Gw of the detonator.

[0098] Calculate the high-risk coefficient Gw of the detonator for one T period based on the working current warning coefficient Xs of the detonator, the working current warning coefficient Gy obtained by high-voltage measurement, and the working current warning coefficient Dy obtained by low-voltage measurement. Specifically:

[0099] Through the formula: Obtain the high-risk coefficient Gw of the detonator, where b1, b2, and b3 are preset proportionality coefficients, and b1, b2, b3>0.

[0100] It should be noted that Xs, Gy, and Dy are the working current warning coefficients obtained by normal voltage, low voltage, and high voltage measurements respectively. Based on the high-risk analysis signal, the working current warning coefficient obtained by normal voltage measurement is not sufficient to comprehensively evaluate the risk status of the detonator because the connection problem of the blasting wire may cause unstable current transmission and affect the normal operation of the detonator. The working current warning coefficients Xs, Gy, and Dy obtained by normal voltage, low voltage, and high voltage measurements all need to be considered comprehensively. Through the comprehensive analysis of the three warning coefficients, the risk status of the detonator under this complex working condition can be understood more comprehensively, so as to take corresponding measures to ensure the safety of blasting operations.

[0101] Step 4: Draw a cycle-high risk coefficient change curve based on the high risk coefficient Gw, obtain the detonator risk level value Dj according to the change curve, and divide the detonator risk level into low risk and medium-high risk according to the detonator risk level value Dj;

[0102] Calculate the high-risk factor Gw value of detonators in multiple periods T, set the period T as the X-axis and the high-risk factor Gw value as the Y-axis, and draw a period-high-risk factor change curve in a two-dimensional rectangular coordinate system;

[0103] The threshold value of the high-risk factor of the detonator is marked as Fx, and a reference line parallel to the X-axis is drawn. The curve segment of the cycle-high-risk factor variation curve that exceeds the reference line is marked as the exceeded curve segment, and the cycle corresponding to the exceeded curve segment on the X-axis is marked as the exceeded cycle. The number of exceeded cycles is counted and the ratio is processed by the total number of cycles to obtain the exceeded cycle ratio Zb;

[0104] Sum and average all the high-risk coefficients Gw corresponding to the curve segment to obtain the high-risk coefficient mean, perform subtraction processing on the high-risk coefficient mean and the high-risk coefficient threshold to obtain the high-risk coefficient difference, and perform ratio processing on the high-risk coefficient threshold to obtain the high-risk difference ratio Cb;

[0105] The detonator risk level value Dj is calculated based on the excess cycle ratio Zb and the high-risk difference ratio Cb, and the detonator high-risk level value is divided into two levels: low risk and high risk;

[0106] Specifically, the method for obtaining the detonator risk level value is:

[0107] The excess cycle ratio Zb and the high-risk difference ratio Cb are weighted by the weighted processing formula: Dj = c1*Zb+c2*Cb, where c1 and c2 are preset proportional coefficients;

[0108] Compare the detonator risk level value Dj with the risk level threshold Fh:

[0109] If the detonator risk level value Dj is less than the risk level threshold Fh, the detonator is marked as low risk, but the detonator status still needs to be continuously detected;

[0110] If the detonator risk level value Dj ≥ risk level threshold Fh, the detonator is marked as high risk, a high risk warning is reported to the microcontroller MCU, and a new detonator is replaced;

[0111] The technical solution described in the embodiment of the present invention is: monitoring the working current I of a single detonator under normal working voltage within a detonation cycle T J , and compared with the rated working current H, to generate abnormal analysis signals and normal working signals. Based on the abnormal analysis signals, the working current warning coefficient Xs is calculated, and the working current I of a single detonator is converted into JThe difference and ratio processing is performed with the rated working current H to obtain the working current difference ratio Cz, and the number of times and the total number of times the working current exceeds the rated current are counted to obtain the working number excess ratio Cs. The working current warning coefficient Xs is calculated according to the formula, and it is compared with the current warning coefficient threshold Yz to generate working abnormality signals and high-risk analysis signals. Based on the high-risk analysis signal, the high-risk coefficient Gw is calculated for the working current warning coefficients obtained from normal, high-voltage and low-voltage measurements, the Gw values ​​for multiple cycles are calculated, and the cycle-high-risk coefficient change curve is drawn. The detonator risk level value Dj is calculated according to the change curve, and the detonators are divided into low risk and medium-high risk. Low risk continues to monitor the detonators, and high risk is reported to the system and the detonators are replaced.

[0112] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation 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. An online circuit testing method, characterized in that: Including: S1. Start communication control Ctl. The microprocessor circuit (40) sends a discharge signal to the detonator (50) through the communication circuit (10). After receiving the discharge signal, the detonator (50) releases the voltage energy of the firing capacitor. S2, preset a low voltage to measure the working current of the detonator (50) and mark it as I OLV , adjusting the voltage values ​​of the firing lines A and B, setting the voltage difference between the firing lines A and B to a set target low voltage value and marking it as LV, starting the current detection circuit (20) to detect the working current I of the detonator (50) OLV ; S3, preset a high voltage to measure the working current of the detonator (50) and mark it as I OHV , keep the low voltage LV value set by the communication circuit (10) unchanged, start the ignition circuit (30) through the high voltage enable En1 to output the set high voltage value and mark it as HV, and after the set high voltage HV reaches the set value, start the current detection circuit (20) again to detect the working current I of the detonator (50) OHV； S4, close the ignition circuit (30) and the communication circuit (10), and preset the control circuit branch state into normal, short circuit, and open circuit states. Based on the three preset circuit states, combined with the ignition circuit high voltage HV and the high voltage measured I OLV , a low voltage LV output by the communication circuit (10), and an I obtained by measuring the low voltage OHV Detonator working current, specifically analyze the state of the control circuit branch, and report the state of the control circuit branch to the microcontroller MCU to shut down the damaged system in time; Considering the influence of distributed parameters, the current threshold I is set TH2 Half the operating current of a single detonator; When I OHV OLV -I TH2 When the control branch is short-circuited, a control branch damage signal is generated. After receiving the control branch damage signal, the microprocessor MCU reports the circuit damage to the system.​ S5. Based on the control branch damage signal, the microprocessor MCU reports circuit damage to the system. The system prohibits the detonator from detonating and discharging by turning off the ignition enable En2 and the high-voltage enable En1. At the same time, even if the MCU receives a charging instruction, it does not perform the charging operation to ensure circuit safety.

2. An online circuit testing method according to claim 1, characterized in that: The method for judging the damaged state of the control branch is as follows: If the control branch is short-circuited, even if the ignition enable En2 is not turned on, the high voltage HV output by the ignition circuit (30) will be transmitted to the gun line A. Since the high voltage HV output by the ignition circuit (30) is greater than the low voltage LV output by the communication circuit (10), the current I measured when the ignition circuit (30) is turned on is OHV will not include the detonator's operating current, i.e., I OHV OLV ;​ Among them, the detonator current I obtained by low voltage measurement OLV The detonator current I obtained by measuring the high voltage OHV The two current reductions are at least the working current I of a detonator J ; Considering the influence of distributed parameters, the current threshold I is set TH2 It is 1 / 5 to 4 / 5 of the working current of a single detonator. TH1 The value is generally much smaller than the working current of a single detonator. Obviously, I TH2 >I TH1 ; Preferably, That is, it is set to half the operating current of a single detonator; When I OHV OLV -I TH2 When the control branch is short-circuited, a control branch damage signal is generated. After receiving the control branch damage signal, the microprocessor MCU reports the circuit damage to the system.​ If the control branch is open, the current I measured when the ignition circuit (30) is turned on OHV The current remains unchanged, but the ignition voltage cannot be transmitted to the detonator (50) during detonation, and the detonator needs to be replaced.

3. An online circuit testing method according to claim 1, characterized in that: The method for judging the normal state of the control branch is as follows: If the control branch is normal, since the ignition enable En2 is not turned on, the high voltage HV output by the start-up ignition circuit (30) cannot be transmitted to the firing line A, and the detonator current I obtained by low voltage measurement is obtained. OHV The detonator current I obtained by measuring the high voltage OLV The smaller measurement error value is marked as I TH1 ; If I TH1 Much smaller than the normal operating current I of a single detonator J , at this time the control circuit branch is in normal state.

4. An on-line circuit test method according to claim 3, characterized in that: The processing method for the control branch open circuit is as follows: If the control branch is open, the current I measured when the ignition circuit (30) is turned on OHV The current remains unchanged, but the ignition voltage cannot be transmitted to the detonator (50) during detonation, and the detonator needs to be replaced.

5. An online circuit testing method according to claim 1, characterized in that: It also includes: Step 1: Monitor the working current I of a single detonator under normal working voltage within a detonation cycle T. J , J = 1, 2, ..., n, n is the number of detonators, and is compared with the rated working current H, and an abnormal analysis signal and a normal working signal are generated according to the comparison result; If the working current of the detonator I J > Rated working current H of detonator, generating abnormal analysis signal; If the working current of the detonator I J ≤ the rated working current H of the detonator, generating a normal working signal; Step 2. Based on the abnormal analysis signal, calculate the working current warning coefficient Xs of the detonator. Compare the working current warning coefficient Xs of the detonator with the current warning coefficient threshold Yz to obtain a working abnormal signal and a high-risk analysis signal. Step 3. Based on the high-risk analysis signal, calculate the working current warning coefficient Xs of the detonator, the working current warning coefficient Gy measured by high voltage, and the working current warning coefficient Dy measured by low voltage to obtain the high-risk coefficient Gw of the detonator. Step 4. Draw a period-high-risk coefficient change curve based on the high-risk coefficient Gw. Process the change curve to obtain the detonator risk level value Dj. Divide the risk level of the detonator into low risk and medium-high risk according to the detonator risk level value Dj.

6. An on-line circuit test method according to claim 5, characterized in that: The generation method of the high-risk analysis signal is: By formula: Obtain the detonator's working current warning coefficient Xs, where a1 and a2 are preset proportional coefficients; Obtain the working current warning coefficient Xs of the detonator, and compare the working current warning coefficient Xs with the working current warning coefficient threshold Yz. If Xs≥Yz, it indicates that the abnormal situation of the working current of the detonator exceeds the warning value, generate a working abnormal signal, and report the abnormal state of the detonator to the microcontroller MCU. If Xs<Yz, it indicates that the abnormal working current of the detonator does not exceed the warning value, but the detonator is in a high-risk working environment, and generate a high-risk analysis signal.

7. An on-line circuit test method according to claim 6, characterized in that: The obtaining methods of the working current difference ratio Cz and the working times excess ratio Cs are: Count the number of times the abnormal analysis signal appears when the working current of the detonator exceeds the rated current by H within a period T and the number of times the normal working signal appears when the working current of the detonator does not exceed the rated current by H, sum to obtain the total number of working times. Divide the number of times the abnormal analysis signal appears when the working current of the detonator exceeds the rated current by H by the total number of working times to obtain the working times excess ratio, and mark it as Cs. When the abnormal analysis signal appears, the detonator working current I J The working current difference is obtained by performing difference processing with the rated working current H. The working current differences corresponding to all abnormal analysis signals are summed and averaged to obtain the working current difference mean. The working current difference mean is ratio processed with the rated working current to obtain the working current difference ratio, which is marked as Cz.

8. An on-line circuit test method according to claim 5, characterized in that: The obtaining method of the high-risk coefficient Gw of the detonator is: Calculate the high-risk coefficient Gw of the detonator in a T period based on the working current warning coefficient Xs of the detonator, the working current warning coefficient Gy measured by high voltage, and the working current warning coefficient Dy measured by low voltage. Specifically: By formula: Obtain the high-risk factor Gw of the detonator, where b1, b2, and b3 are preset proportional coefficients, and b1, b2, and b3>

0.

9. An online circuit testing method according to claim 5, characterized in that: The detonator risk level value Dj is obtained in the following manner: The detonator risk level value Dj is calculated based on the excess cycle ratio Zb and the high-risk difference ratio Cb, and the detonator high-risk level is divided into two levels: low risk and high risk; Specifically, the method for obtaining the detonator risk level value Dj is as follows: The excess cycle ratio Zb and the high-risk difference ratio Cb are weighted by the weighted processing formula: Dj = c1*Zb+c2*Cb, where c1 and c2 are preset proportional coefficients; Compare the detonator risk level value Dj with the risk level threshold Fh: If the detonator risk level value Dj is less than the risk level threshold Fh, the detonator is marked as low risk, but the detonator status still needs to be continuously detected; If the detonator risk level value Dj ≥ risk level threshold Fh, the detonator is marked as high risk, a high risk warning is reported to the microcontroller MCU, and a new detonator is replaced.

10. An online circuit testing method according to claim 9, characterized in that: The method for obtaining the excess period ratio Zb and the high-risk difference ratio Cb is as follows: Calculate the high-risk factor Gw value of detonators in multiple periods T, set the period T as the X-axis and the high-risk factor Gw value as the Y-axis, and draw a period-high-risk factor change curve in a two-dimensional rectangular coordinate system; The threshold value of the high-risk factor of the detonator is marked as Fx, and a reference line parallel to the X-axis is drawn. The curve segment of the cycle-high-risk factor variation curve that exceeds the reference line is marked as the exceeded curve segment, and the cycle corresponding to the exceeded curve segment on the X-axis is marked as the exceeded cycle. The number of exceeded cycles is counted and the ratio is processed by the total number of cycles to obtain the exceeded cycle ratio Zb; Sum and average all the high-risk coefficients Gw corresponding to the curve segment to obtain the high-risk coefficient mean, perform subtraction processing on the high-risk coefficient mean and the high-risk coefficient threshold to obtain the high-risk coefficient difference, and perform ratio processing on the high-risk coefficient threshold to obtain the high-risk difference ratio Cb.

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