An online circuit testing method

Abstract

The present application relates to the technical field of circuit test, and specifically discloses an online circuit test method, which comprises the following steps: starting communication control, a microprocessor sends an electric signal to a detonator through a communication circuit, the detonator releases the energy of a firing capacitor, preset low and high voltage is used to measure the current of the detonator, the voltage difference of a cannon line is adjusted, a current detection circuit is started, the ignition and communication circuit are closed, the state (normal, short circuit, open circuit) of a control branch is analyzed and reported to a controller, the short circuit state of the system is judged by considering the influence of distributed parameters, the circuit damage is reported to the microprocessor based on a damage signal, and meanwhile the system closes the related enable and prohibits the detonator from exploding and discharging; the system further comprises monitoring the working current of the detonator in the detonation period, comparing the working current with a rated current to generate an analysis signal, calculating a warning coefficient, calculating a high-risk coefficient based on a high-risk analysis signal and drawing a curve, dividing the risk grade of the detonator, and taking corresponding measures for detonators of different risk grades.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of circuit testing, in particular to an online circuit testing method. BACKGROUND

[0002] In the civilian explosive industry, long wires are usually used to connect a certain number of electronic delay detonators. The initiator sends signals to each electronic delay detonator through the wire, and each electronic delay detonator responds to the command sent by the initiator according to a specific protocol.

[0003] To ensure the safety of the blasting personnel, the wire is usually very long, and 1000 meters is a common length reference value. Due to the harsh conditions of the blasting site and the time pressure after the charge is added, there may be a short circuit of the wire during the connection detection. The overcurrent detection used in the connection detection can exclude general simple short circuits of the wire, but cannot avoid the short circuit of the wire caused by the explosion. At the moment of explosion, there is a certain probability that the wire will be short-circuited temporarily or permanently. Since the ignition is a time period, the high voltage of the ignition exists on the wire during this time period, and the duration exceeds the time of the charge causing detonation. If the short circuit occurs during this ignition time period, there is a risk of damage to the control branch of the initiator ignition circuit after this blasting. Since the communication circuit is independent of the ignition circuit and has a low working voltage, it is basically not damaged. Therefore, when the control branch of the ignition circuit is damaged, the connection detection can be successfully executed, but when the detonation state is entered, the ignition circuit starts to work and outputs high voltage. 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 starts, thereby causing early explosion. Early explosion will affect the blasting effect and even threaten the safety of the workers. Therefore, it is necessary to conduct online investigation on the ignition control branch to reduce early explosion accidents and reduce risks.

[0004] Therefore, the present application provides an online circuit testing method. SUMMARY

[0005] The present application aims to provide an online circuit testing method to solve the above background problems.

[0006] The purpose of the present application 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 receiving 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, adjust the voltage value of the gun line A, B, set the voltage difference of the gun line A, 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 ;

[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) to output the set high voltage value and mark it as HV through the high voltage enable En1, 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, turn off the ignition circuit (30) and the communication circuit (10), preset the control circuit branch state into normal, short circuit and open circuit states, based on the three preset circuit states, combine the high voltage HV of the ignition circuit, the I OLV , the low voltage LV output by the communication circuit (10) and the I OHV of the detonator working current, analyze the state of the control circuit branch in detail, and report the state of the control circuit branch to the microcontroller MCU, and close the damaged system in time;

[0011] Considering the influence of the distributed parameters, set the current threshold I TH2 as half of the working current of a single detonator;

[0012] When I OHV <I OLV -I TH2 , it is judged that the control branch is short-circuited, a control branch damage signal is generated, and the microprocessor MCU reports the circuit damage to the system after receiving the control branch damage signal;

[0013] S5, based on the control branch damage signal, the microprocessor MCU reports the circuit damage to the system, and the system prohibits detonator initiation and discharge by closing the ignition enable En2 and the high voltage enable En1, and even if the MCU receives a charging instruction, no charging action is performed to ensure the safety of the circuit.

[0014] As a further technical solution of the application, the control branch damage state judgment method is as follows:

[0015] If the control branch is short-circuited, the high voltage HV output by the ignition circuit (30) will be transmitted to the gun line A even if the ignition enable En2 is not turned on, and since the output high voltage HV of the ignition circuit (30) is greater than the low voltage LV output by the communication circuit (10), the current I OHV measured when the ignition circuit (30) is turned on will not contain the working current of the detonator, that is, IOHV <I OLV ;

[0016] Wherein, the low voltage measured detonator current I OLV and high voltage measured detonator current I OHV Two current reduction at least one detonator operating current I J ;

[0017] Considering the impact of distribution parameters, set the current threshold I TH2 1 / 5 to 4 / 5 of the operating current of a single detonator, since I TH1 The value is generally much smaller than the operating current of a single detonator, obviously, I TH2 >I TH1 ;

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

[0019] When I OHV <I OLV -I TH2 , the control branch short circuit is judged, and the control branch damage signal is generated. After the microprocessor MCU receives the control branch damage signal, the circuit damage is reported to the system;

[0020] If the control branch is open, although the current I OHV The current does not change when the ignition circuit (30) is turned on, but the ignition voltage cannot be transmitted to the detonator (50) at the time of initiation, at which time the initiator needs to be replaced.

[0021] As a further technical solution of the present application: the control branch normal judgment method 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 ignition circuit (30) cannot be transmitted to the cannon line A, the low voltage measured detonator current I OHV and high voltage measured detonator current I OLV Value, the smaller amplitude of the measurement error value is marked as I TH1 ;

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

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

[0025] If the control branch is open, although the current I OHVThe current is constant, but the ignition voltage cannot be transmitted to the detonator (50) at the moment of detonation, at which time the initiator needs to be replaced.

[0026] As a further technical solution of the present application: a test method of an online circuit further comprises:

[0027] Step one, monitoring the working current I of a single detonator under normal working voltage in 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 abnormal analysis signals and normal working signals are generated according to the comparison results;

[0028] If the working current I of the detonator J > The rated working current H of the detonator, an abnormal analysis signal is generated;

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

[0030] Step two, based on the abnormal analysis signal, calculate the working current warning coefficient Xs of the detonator, and compare the working current warning coefficient Xs with the current warning coefficient threshold Yz to obtain the working abnormal signal and the high-risk analysis signal;

[0031] Step three, 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;

[0032] Step four, based on the high-risk coefficient Gw, draw a period-high-risk coefficient change curve, obtain the risk grade value Dj of the detonator according to the change curve processing, and divide the risk grade of the detonator into low risk and high risk according to the risk grade value Dj of the detonator.

[0033] As a further technical solution of the present application: the generation mode of the high-risk analysis signal is:

[0034] Through the formula: Obtain the working current warning coefficient Xs of the detonator, wherein a1 and a2 are preset proportional coefficients;

[0035] 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;

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

[0037] If Xs< Yz, the working current of the surface detonator is abnormal and does not exceed the early warning value, but the detonator is in a high-risk working environment, and a high-risk analysis signal is generated.

[0038] As a further technical solution of the present application, the working current difference ratio Cz and the working frequency exceeding ratio Cs are obtained in the following manner:

[0039] The number of times that the abnormal analysis signal appears when the working current of the detonator exceeds the rated current H in a period T and the number of times that the normal working signal appears when the working current does not exceed the rated current H are counted, summed to obtain the total working frequency, and the ratio of the number of times that the abnormal analysis signal appears when the working current of the detonator exceeds the rated current H to the total working frequency is processed to obtain the working frequency exceeding ratio, which is marked as Cs.

[0040] When the abnormal analysis signal appears, the working current I J of the detonator is processed by difference with the rated working current H to obtain the working current difference, the working current differences corresponding to all abnormal analysis signals are summed and averaged to obtain the working current difference average, and the ratio of the working current difference average to the rated working current is processed to obtain the working current difference ratio, which is marked as Cz.

[0041] As a further technical solution of the present application, the high-risk coefficient Gw of the detonator is obtained in the following manner:

[0042] The high-risk coefficient Gw of the detonator in a period T is calculated based on the working current early warning coefficient Xs of the detonator, the working current early warning coefficient Gy obtained by high-voltage measurement, and the working current early warning coefficient Dy obtained by low-voltage measurement, specifically:

[0043] The high-risk coefficient Gw of the detonator is obtained by the formula: wherein b1, b2, and b3 are preset proportion coefficients, and b1, b2, and b3>0.

[0044] As a further technical solution of the present application, the detonator risk level value Dj is obtained in the following manner:

[0045] The detonator risk level value Dj is calculated based on the exceeding period ratio Zb and the high-risk difference ratio Cb, and the high-risk level of the detonator is divided into two levels, low risk and high risk.

[0046] Specifically, the detonator risk level value Dj is obtained in the following manner:

[0047] The exceeding period ratio Zb and the high-risk difference ratio Cb are weighted processed by the weighted processing formula: Dj=c1*Zb+c2*Cb, wherein c1 and c2 are preset proportion coefficients.

[0048] The detonator risk level value Dj is compared with the risk level threshold Fh.

[0049] If the detonator risk level value Dj < the risk level threshold Fh, the detonator is marked as low risk, but the detonator status still needs to be continuously monitored.

[0050] If the detonator risk level value Dj is greater than or equal to the 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 cycle ratio Zb and the high-risk difference ratio Cb is as follows:

[0052] Calculate the high-risk coefficient Gw value of detonators for multiple periods T, set the period T as the X-axis and the high-risk coefficient Gw value as the Y-axis, and plot the period-high-risk coefficient variation curve in a two-dimensional rectangular coordinate system.

[0053] Mark the high-risk coefficient threshold of the detonator as Fx, draw a reference line parallel to the X-axis, mark the curve segment of the period-high-risk coefficient change curve that exceeds the reference line as the excess curve segment, mark the period corresponding to the excess curve segment on the X-axis as the excess period, count the number of excess periods and compare it with the total number of periods to obtain the excess period ratio Zb.

[0054] The mean of all high-risk coefficients Gw corresponding to the curve segment is summed and averaged to obtain the mean high-risk coefficient. The difference between the mean high-risk coefficient and the high-risk coefficient threshold is processed to obtain the high-risk coefficient difference. The ratio of the high-risk coefficient difference to the high-risk coefficient threshold is processed to obtain the high-risk difference ratio Cb.

[0055] The beneficial effects of this invention are:

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

[0057] (2) Based on the high-risk analysis signal, the high-risk coefficient Gw is calculated by the working current warning coefficient obtained by normal, high pressure and low pressure measurement, the Gw value of multiple periods is measured and calculated, the period-high risk coefficient change curve is drawn, the detonator risk grade value Dj is calculated according to the change curve, the detonator is divided into low risk and high risk, the low risk detonator continues to monitor the detonator, the high risk detonator reports to the system and replaces the detonator, and different measures are taken for detonators with different risk grades. The low-risk detonator is continuously detected, and the medium and high-risk detonators are replaced in time. The hierarchical management mode realizes the fine management of the detonator, optimizes the resource allocation in the detonator use process, and avoids the one-size-fits-all treatment mode. At the same time, it ensures that the medium and high-risk detonators can be replaced in time, further improving the safety and reliability of blasting operation. BRIEF DESCRIPTION OF DRAWINGS

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

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

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

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

[0062] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0063] Embodiment 1

[0064] As shown in Figure 1 and Figure 2 , the online circuit detection method described in the embodiments of the present application 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 receiving the discharge signal, the detonator 50 releases the voltage energy of the ignition capacitor;

[0066] Specifically, the communication circuit 10 is started by the communication control Ct1, the microprocessor circuit 40 sends a discharge instruction to the input In of the communication circuit 10, and the communication circuit 10 transmits a low-voltage communication signal to the detonator 50 through the current detection circuit 20, the first reverse prevention diode D1 and the fuse wire after processing. After receiving the low-voltage communication signal, the detonator 50 performs a discharge action to completely release the voltage energy possibly remaining 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, and is generally 1-10 seconds.

[0067] It should be noted that the function of the reverse diode is to protect the circuit from reverse voltage. When the detonator performs a discharge action, the voltage energy remaining on the ignition capacitor is released, and a transient reverse current may be generated during the discharge process. In addition, when the circuit elements are damaged or connected incorrectly, a reverse current may also be generated. When the current flows in the reverse direction to the reverse diode, the reverse current is prevented from passing through due to the unidirectional conduction characteristic of the diode, thereby 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, a low-voltage measurement detonator 50 working current is preset and marked as I OLV , the voltage values of the fuse wires A and B are adjusted, the voltage difference between the fuse wires A and B is set to a set target low-voltage value and marked as LV, the current detection circuit 20 is started to detect the working current I OLV of the detonator 50, and the working current I OLV is measured, thereby providing reference data for subsequent judgment of the branch circuit state.

[0069] S3, a high-voltage measurement detonator 50 working current is preset and marked as I OHV , the low-voltage LV value set by the communication circuit 10 is kept unchanged, the ignition circuit 30 is started by the high-voltage enable En1 to output a set high-voltage value and marked as HV, the current detection circuit 20 is started again to detect the working current I OHV of the detonator 50 after the set high-voltage HV reaches the set value, and the working current I OHV is measured, thereby providing reference data for subsequent judgment of the branch circuit state.

[0070] S4, the ignition circuit 30 and the communication circuit 10 are turned off, the control circuit branch state is preset to be divided into normal, short-circuit and open-circuit states, based on the three preset circuit states, the I OLV measured by the high-voltage of the ignition circuit HV, the low-voltage LV output by the communication circuit 10 and the I OHV measured by the low-voltage of the communication circuit 10, the working current of the detonator, the state of the control circuit branch is specifically analyzed, and the state of the control circuit branch is reported to the microcontroller MCU, so that the damaged system can be turned off in time.

[0071] It should be noted that the ignition circuit 30 is responsible for generating and controlling high-voltage current, after completing the test on the detonator, the ignition circuit 30 is turned off to prevent the high-voltage current from flowing to the detonator, prevent accidental ignition or damage to the detonator, and provide a stable and safe circuit environment for subsequent detection and comparison judgment; the communication circuit is responsible for processing and transmitting control signals, including sending instructions from the microprocessor MCU to the ignition circuit of the ignition circuit and the current detection circuit, turning off the communication circuit is to prevent the communication circuit from sending or receiving new data during the measurement process, reduce the influence on the collected data;

[0072] Specifically, if the control branch is normal, the high voltage HV output by the ignition circuit 30 cannot be transmitted to the cannon line A due to the unopened ignition enable En2, and the detonator current I OHV and the detonator current I OLV measured by high-voltage measurement will have a smaller measurement error value, and is marked as I TH1 ;

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

[0074] If the control branch is short-circuited, even if the ignition enable En2 is not opened, the high voltage HV output by the ignition circuit 30 will be transmitted to the cannon line A, and 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 OHV measured when the ignition circuit 30 is turned on will not contain the working current of the detonator, that is, I OHV <I OLV ;

[0075] In theory, the detonator current I OLV measured by low-voltage measurement and the detonator current I OHV measured by high-voltage measurement are reduced by at least the working current I J of a single detonator;

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

[0077] Preferably, that is, set to half of the working current of a single detonator;

[0078] When I OHVI OLV -I TH2 When the control branch is short-circuited, a control branch damage signal is generated, and after the microprocessor MCU receives the control branch damage signal, the system is reported circuit damage;

[0079] It should be noted that the influence of the distributed parameters refers to that in the circuit, due to the distributed characteristics of various components such as diodes, capacitors and the physical characteristics (length, cross-sectional area) of the line, the current, voltage and other parameters in the circuit will have certain differences and fluctuations at different positions and times. By setting the threshold value, the influence of the distributed parameters on the circuit is reduced, and the accuracy of the judgment is improved. TH2

[0080] If the control branch is open, although the current I OHV measured when the ignition circuit 30 is turned on does not change, the ignition voltage cannot be transmitted to the detonator 50 at the time of initiation, at which time the initiator needs to be replaced;

[0081] It should be noted that the disconnection of a part of the control circuit branch causes 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. In the absence of high voltage HV, the detonator 50 is still under low voltage LV conditions, and the low voltage current I OLV measured by the current detection circuit 20 remains unchanged, so the detonator 50 cannot be detonated at this time. In order to ensure safe and effective operation, the initiator is replaced so that the system can work normally;

[0082] S5, based on the control branch damage signal, the microprocessor MCU reports circuit damage to the system, the system closes the ignition enable En2 and the high voltage enable En1, prohibits detonator initiation and discharge, and at the same time, even if the MCU receives a charging instruction, it does not perform a charging action to ensure circuit safety;

[0083] The technical scheme of the embodiment of the application is: starting the communication control Ct l, the microprocessor circuit 40 sends a discharge signal to the detonator 50 through the communication circuit 10, after the detonator 50 receives the discharge signal, the detonator 50 releases the voltage energy of the firing capacitor, a high voltage is preset to measure the working current of the detonator 50 and marked as I OHV , a high voltage is preset to measure the working current of the detonator 50 and marked as I OHV , the ignition circuit 30 and the communication circuit 10 are closed, and the control circuit branch state is preset to be normal, short-circuit and open-circuit state. If the control branch is normal, since the high voltage HV cannot be transmitted to the cannon line A when the ignition enable En2 is not turned on, the low voltage measured detonator current I OHV and the high voltage measured detonator current I OLV value, if the measurement error value I TH1 ​Far less than the normal working current I of single detonator J 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 cannon line A, when I OHV <I OLV -I TH2 When the control branch is open-circuited, the current I measured when the ignition circuit 30 is turned on OHV does not change, but the ignition voltage cannot be transmitted to the detonator 50 at the time of detonation, at which time the initiator needs to be replaced.

[0084] Embodiment 2、

[0085] As Figure 3 shown, based on the basis of embodiment 1, the online circuit test method according to the embodiment of the application comprises:

[0086] Step one, monitoring the working current I of single detonator under normal working voltage in 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 I J of the detonator is greater than the rated working current H of the detonator, an abnormal analysis signal is generated;

[0088] If the working current I J of the detonator is less than or equal to the rated working current H of the detonator, a normal working signal is generated;

[0089] Step two, based on the abnormal analysis signal, the working current warning coefficient Xs of the detonator is calculated, and a working abnormal signal and a high-risk analysis signal are obtained by comparing the working current warning coefficient Xs of the detonator with the current warning coefficient threshold Yz;

[0090] The number of times of abnormal analysis signal when the working current of the detonator exceeds the rated current work H and the number of times of normal working signal when the working current of the detonator does not exceed the rated current work H in a cycle T are counted, and the sum is obtained to get the total number of working times, and the number of times of abnormal analysis signal when the working current of the detonator exceeds the rated current work H is compared with the total number of working times to get the working time exceeding ratio, and marked as Cs;

[0091] When the abnormal analysis signal appears, the working current I JSubtracting the rated working current H, a working current difference is obtained, the working current difference corresponding to the occurrence of all abnormal analysis signals is summed and averaged to obtain a working current difference average, and the working current difference average is subjected to ratio processing with the rated working current to obtain a working current difference ratio, which is marked as Cz;

[0092] According to the working current difference ratio Cz and the working frequency exceeding ratio Cs, a working current warning coefficient Xs of the detonator is calculated;

[0093] Through the formula: The working current warning coefficient Xs of the detonator is obtained, wherein a1 and a2 are preset proportional coefficients;

[0094] The working current warning coefficient Xs of the detonator is obtained, and the working current warning coefficient Xs is compared with a working current warning coefficient threshold Yz;

[0095] If Xs≥Yz, it indicates that the working current abnormality of the detonator exceeds the warning value, a working abnormality signal is generated, and the abnormal state of the detonator is reported to the microcontroller MCU;

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

[0097] Step three, 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 a high-risk coefficient Gw of the detonator;

[0098] 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, a high-risk coefficient Gw of the detonator in a T period is calculated, specifically:

[0099] Through the formula: The high-risk coefficient Gw of the detonator is obtained, wherein b1, b2, and b3 are preset proportional coefficients, and b1, b2, and b3>0;

[0100] It should be noted that Xs, Gy, and Dy are working current warning coefficients obtained by normal voltage, low voltage, and high voltage measurement, 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 cannon line may cause unstable current transmission and affect the normal work of the detonator. The working current warning coefficients Xs, Gy, and Dy obtained by normal voltage, low voltage, and high voltage measurement all need to be considered comprehensively. Through comprehensive analysis of the three warning coefficients, the risk status of the detonator under such complex working conditions can be more comprehensively understood, so that corresponding measures can be taken to ensure the safety of blasting operations.

[0101] Step four, based on the high-risk coefficient Gw, a period-high-risk coefficient change curve is drawn, and the change curve is processed to obtain a detonator risk level value Dj, and the detonator risk level is divided into low risk and high risk according to the detonator risk level value Dj;

[0102] The detonator high-risk coefficient Gw values of multiple periods T are measured, the period T is set as the X axis, and the high-risk coefficient Gw value is set as the Y axis. A period-high-risk coefficient change curve is drawn in a two-dimensional rectangular coordinate system.

[0103] The detonator high-risk coefficient threshold is marked as Fx, a reference line parallel to the X axis is drawn, the curve segment of the period-high-risk coefficient change curve that exceeds the reference line is marked as an exceeding curve segment, the period corresponding to the exceeding curve segment on the X axis is marked as an exceeding period, the number of exceeding periods is counted and a ratio processing is performed with the total number of periods to obtain an exceeding period ratio Zb.

[0104] The sum of all high-risk coefficients Gw corresponding to the exceeding curve segment is taken to obtain a high-risk coefficient mean value, a difference processing is performed between the high-risk coefficient mean value and the high-risk coefficient threshold to obtain a high-risk coefficient difference, and a ratio processing is performed between the high-risk coefficient difference and the high-risk coefficient threshold to obtain a high-risk difference ratio Cb.

[0105] Based on the exceeding period ratio Zb and the high-risk difference ratio Cb, a detonator risk level value Dj is calculated, and the detonator high-risk level value is divided into two levels of low risk and high risk.

[0106] Specifically, the detonator risk level value is obtained in the following manner:

[0107] The exceeding period ratio Zb and the high-risk difference ratio Cb are weighted, and the weighted processing formula is Dj=c1*Zb+c2*Cb, wherein c1 and c2 are preset proportion coefficients.

[0108] The detonator risk level value Dj is compared with a 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 state of the detonator still needs to be continuously detected.

[0110] If the detonator risk level value Dj is greater than or equal to the 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 scheme of the embodiment of the application is: monitoring the working current I of a single detonator in one initiation period T under normal working voltage J , comparing it with the rated working current H, generating an abnormal analysis signal and a normal working signal, calculating a working current warning coefficient Xs based on the abnormal analysis signal, and comparing the working current I of the single detonator with the working current warning coefficient Xs JThe difference and ratio processing is performed on the rated working current H to obtain a working current difference ratio Cz, and the number of times and the total number of times that the working current exceeds the rated current are counted to obtain a working time exceeding ratio Cs. A working current warning coefficient Xs is calculated according to a formula, compared with a current warning coefficient threshold Yz, and working abnormal signals and high-risk analysis signals are generated. Based on the high-risk analysis signals, a high-risk coefficient Gw is calculated for the working current warning coefficients obtained by normal, high-voltage and low-voltage measurements. The Gw values of multiple periods are calculated, a period-high-risk coefficient change curve is drawn, a detonator risk grade value Dj is calculated according to the change curve, and the detonator is divided into low-risk and high-risk. The low-risk detonator continues to be monitored, and the high-risk detonator is reported to the system and replaced.

[0112] The above describes one embodiment of the present application in detail, but the content is only the preferred embodiment of the present application, and cannot be considered to limit the scope of the present application. Any equivalent changes and improvements made within the scope of the present application should still belong to the patent scope of the present application.

Claims

1. An online circuit testing method, characterized in that: include: S1, start communication control Ctl, microprocessor circuit (40) sends discharge signal to detonator (50) through communication circuit (10), after receiving the discharge signal, detonator (50) releases the voltage energy of the ignition capacitor; S2, preset a low-voltage measuring detonator (50) operating current and mark it as I. OLV Adjust the voltage values ​​of gun wires A and B, set the voltage difference between gun wires A and B to the 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 ; S3, preset a high-voltage measuring detonator (50) operating current and mark it as I. OHV Keeping the target low voltage value LV set by the communication circuit (10) unchanged, the ignition circuit (30) is started by the high voltage enable En1 to output the set high voltage value and mark it as HV. When the ignition circuit voltage reaches the high voltage value HV, the current detection circuit (20) is started again to detect the working current I of the detonator (50). OHV； S4. 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. Based on the three preset circuit states, combined with the high voltage value HV of the ignition circuit and the I obtained by measuring the high voltage value, the control circuit branch state is divided into normal, short circuit and open circuit states. OHV The target low voltage value LV output by the communication circuit (10) and the I obtained from the low voltage measurement. OLV The detonator operating current is used to analyze the status of the control circuit branch and report the status of the control circuit branch to the microcontroller (MCU) to promptly shut down the damaged system. Considering the influence of distributed parameters, set the current threshold I. TH2 Half the operating current of a single detonator; When I OHV OLV -I TH2 When a short circuit is detected in the control branch, a control branch damage signal is generated. After receiving the control branch damage signal, the microprocessor MCU reports the circuit damage to the system.​ The method for determining 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 activated, 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 activated will be higher. OHV It 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 from high voltage measurement OHV The two current reductions are at least equal to the operating current I of a detonator. J ; Set current threshold 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. In this case, the detonator needs to be replaced. The normal judgment method of the control branch is as follows: If the control branch is normal, since the ignition enable En2 is not activated, the high voltage HV output by the starting ignition circuit (30) cannot be transmitted to the gun line A, and the detonator current I obtained from the low voltage measurement is obtained. OHV The detonator current I obtained from high voltage measurement OLV The value, representing a smaller measurement error, is labeled 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 condition; The handling method for the open circuit of the control branch is as follows: 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. In this case, the detonator needs to be replaced. S5, based on the control branch damage signal, the microprocessor MCU reports the circuit damage to the system. The system prevents 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 command, it will not perform a charging action to ensure circuit safety.

2. The online circuit testing method according to claim 1, characterized in that: Also includes: Step 1: Monitor the operating current I of a single detonator under normal operating voltage within one detonation cycle T. J J = 1, 2, ..., n, where n is the number of detonators, and is compared with the rated operating current H. Based on the comparison results, abnormal analysis signals and normal operating signals are generated. If the detonator's operating current I J > The rated operating current H of the detonator generates an abnormal analysis signal; If the detonator's operating current I J The rated operating current H of the detonator is less than or equal to the rated operating current H of the detonator, generating a normal operating signal; Step 2: Based on the anomaly analysis signal, calculate the detonator's working current warning coefficient Xs. Compare the detonator's working current warning coefficient Xs with the current warning coefficient threshold Yz to obtain the working anomaly signal and high-risk analysis signal. Step 3: Based on the high-risk analysis signal, calculate the detonator's working current warning coefficient Xs, the working current warning coefficient Gy obtained from high-voltage measurement, and the working current warning coefficient Dy obtained from low-voltage measurement to obtain the detonator's high-risk coefficient Gw. The high-risk factor Gw of the detonator is obtained as follows: The high-risk factor Gw of a detonator over a T-cycle is calculated based on the detonator's operating current warning factor Xs, the operating current warning factor Gy obtained from high-voltage measurements, and the operating current warning factor Dy obtained from low-voltage measurements. Specifically: Through the formula: Obtain the high-risk coefficient Gw of the detonator, where b1, b2, and b3 are preset proportional coefficients, and b1, b2, and b3 > 0; Step 4: Plot the cycle-high-risk coefficient variation curve based on the high-risk coefficient Gw, process the curve to obtain the detonator risk level value Dj, and classify the detonator risk level into low risk and medium-high risk based on the detonator risk level value Dj.

3. The online circuit testing method according to claim 2, characterized in that: The high-risk analysis signal is generated in the following way: Through the formula: Obtain the detonator's operating current warning coefficient Xs, where a1 and a2 are preset proportional coefficients; Where Cz is the operating current difference ratio, and Cs is the number of times the operation exceeds the ratio; The operating current difference ratio Cz and the number of operating cycles exceeding the ratio Cs are obtained as follows: The number of abnormal analysis signals occurring when the detonator's operating current exceeds the rated current (operating current H) within a cycle T is counted, along with the number of normal operation signals occurring when the operating current does not exceed the rated current (operating current H). The sum of these counts yields the total number of operations. The ratio of the number of abnormal analysis signals occurring when the detonator's operating current exceeds the rated current (operating current H) to the total number of operations is calculated and denoted as Cs. When an abnormal analysis signal occurs, the difference between the detonator's operating current IJ and the rated operating current H is processed to obtain the operating current difference. The average of the operating current differences corresponding to the occurrence of all abnormal analysis signals is obtained by summing them up. The average operating current difference is then compared with the rated operating current to obtain the operating current difference ratio, which is marked as Cz. 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 detonator's operating current is abnormal and exceeds the warning value. An abnormal operating signal is generated to report the abnormal state of the detonator to the microcontroller MCU. 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.

4. An online circuit testing method according to claim 2, characterized in that: The method for obtaining the detonator risk level value Dj is as follows: Based on the over-cycle 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; Specifically, the method for obtaining the detonator risk level value Dj is as follows: Perform weighted processing on the over-cycle ratio Zb and the high-risk difference ratio Cb, through the weighted processing formula: Dj = c1 * Zb + c2 * Cb, where c1 and c2 are preset proportionality coefficients; Compare the detonator risk level value Dj with the risk level threshold Fh: If the detonator risk level value Dj < the risk level threshold Fh, mark the detonator as low risk, but still need to continuously detect the detonator status; If the detonator risk level value Dj ≥ the risk level threshold Fh, mark the detonator as high risk, report a high-risk warning to the microcontroller MCU, and replace with a new detonator.

5. An online circuit testing method according to claim 4, characterized in that: The method for obtaining the over-cycle ratio Zb and the high-risk difference ratio Cb is as follows: Measure the high-risk coefficient Gw value of the detonator for multiple cycles T, set the cycle T as the X-axis, and the high-risk coefficient Gw value as the Y-axis, and draw a cycle-high-risk coefficient change curve in a two-dimensional rectangular coordinate system; Mark the detonator high-risk coefficient threshold as Fx, draw a reference line parallel to the X-axis, mark the curve segment of the cycle-high-risk coefficient change curve exceeding the reference line as the over-curve segment, mark the cycle corresponding to the over-curve segment on the X-axis as the over-cycle, count the number of over-cycles and perform ratio processing with the total number of cycles to obtain the over-cycle ratio Zb; Sum and average all the high-risk coefficients Gw corresponding to the over-curve segment to obtain the average high-risk coefficient, perform difference processing on the average high-risk coefficient and the high-risk coefficient threshold to obtain the high-risk coefficient difference, and perform ratio processing with the high-risk coefficient threshold to obtain the high-risk difference ratio Cb.

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