Methods for detecting abnormal ignition performance of electronic detonators

Abstract

This invention provides a method for detecting abnormal ignition performance of electronic detonators. It can effectively analyze the ignition performance of electronic detonators, thereby screening for ignition anomalies and ensuring product qualification rate. The method includes the following steps: S1. After receiving an initiation signal, the ignition current data of the ignition circuit in the control module of the electronic detonator under test is collected, and a current discharge curve is obtained from the ignition current data; S2. Based on the current discharge curve, discharge parameters are obtained, and the cause of the ignition anomaly in the control module of the electronic detonator under test is determined by judging whether the discharge parameters meet the set requirements; wherein, the discharge parameters include, but are not limited to, peak ignition current, current discharge time, internal resistance of the ignition circuit, and ignition energy.

Description

Technical Field

[0001] This invention relates to the field of electronic detonator technology, specifically to a method for detecting abnormal ignition performance of electronic detonators. Background Technology

[0002] With the increasingly widespread application of electronic detonators, it is necessary to test the functional parameters of the electronic detonator delay control module. During the testing process, various parameters of the electronic detonator module need to be tested to determine the product's ignition performance. Among these parameters, the ignition current is related to whether the detonator head can be detonated. The larger the current, the stronger the ignition energy and the easier it is to detonate. Therefore, the magnitude of the ignition current represents the ignition capability. However, existing testing methods lack data collection and analysis of the ignition current during the testing process. They cannot statistically analyze and track the test data of the electronic detonator control module. They can only know that there is an abnormality in ignition, but cannot know the specific cause of the abnormality. This leads to low production efficiency and is not conducive to product upgrades and modifications. Summary of the Invention

[0003] To address the aforementioned issues, this invention provides a method for detecting abnormal ignition performance of electronic detonators. This method can effectively analyze the ignition performance of electronic detonators, screen out the causes of ignition abnormalities, and thus ensure the product's production qualification rate.

[0004] The technical solution is as follows: a method for detecting abnormal ignition performance of electronic detonators, characterized by the following steps:

[0005] S1. After receiving the detonation signal, the ignition current data of the ignition circuit in the control module of the electronic detonator under test is collected, and the current discharge curve is obtained through the ignition current data.

[0006] S2. Based on the current discharge curve, the discharge parameters are obtained. Then, by determining whether the discharge parameters meet the set requirements, the cause of the abnormal ignition of the electronic detonator control module under test can be determined.

[0007] The discharge parameters include, but are not limited to, peak ignition current, current discharge time, internal resistance of the ignition circuit, and ignition energy.

[0008] Furthermore, in step S1, after the ignition circuit receives the detonation signal, it obtains the current discharge curve by sampling the current through a current sensor connected to the ignition circuit.

[0009] Furthermore, the ignition circuit includes a MOSFET Q1, an ignition capacitor C1, an ignition resistor B1, a resistor R11, and a contact spring J1. One end of the ignition capacitor C1 is connected to the source of the MOSFET Q1, and the other end of the ignition capacitor C1 is connected to one end of the contact spring J1. The other end of the contact spring J1 is connected to one end of both the ignition resistor B1 and the resistor R11. The drain of the MOSFET Q1 is connected to the other ends of both the ignition resistor B1 and the resistor R11.

[0010] Furthermore, in step S2, when determining the ignition current peak value, the formula is as follows:

[0011] I 峰值 =U0÷R;

[0012] If the peak ignition current I 峰值 If the current is less than the set current, the detonation status of the electronic detonator control module under test is determined to be abnormal.

[0013] If the peak ignition current I 峰值 If the current is not less than the set current, the detonation state of the electronic detonator control module under test is determined to be normal.

[0014] Where U0 is the discharge initiation voltage of the ignition capacitor C1; R is the resistance value of resistor R11;

[0015] Furthermore, in step S2, when determining the result based on the current discharge time, the formula is as follows:

[0016] Δt=t 开始 -t 结束 ;

[0017] If Δt is less than the set time, the discharge time of the electronic detonator control module under test is determined to be abnormal.

[0018] If Δt is not less than the set time, the discharge time of the electronic detonator control module under test is determined to be normal.

[0019] Among them, t 开始 t is the discharge start time of the ignition capacitor C1; 结束 This refers to the end time of discharge of the ignition capacitor C1;

[0020] Furthermore, in step S2, when determining the ignition circuit's internal resistance, the following steps are included:

[0021] S2.1 After the ignition capacitor C1 has finished charging, it is discharged according to the formula R0 = R 放电 +R mos1 Obtain the circuit resistance R0 at the start of discharge;

[0022] Among them, R 放电A fixed resistor for the ignition circuit at the start of discharge;

[0023] R mos1 The internal resistance of MOSFET Q1 at the start of discharge;

[0024] S2.2, According to the formula: R t =R 放电 +R mos2 Obtain the loop resistance R at discharge time t t ;

[0025] Among them, R mos2 Let be the internal resistance of MOSFET Q1 at discharge time t;

[0026] S2.3, Compare R0 and R t The difference in resistance at time points gives us: R 差异 =R mos1 -R mos2 ;

[0027] When R 差异 If the resistance value is greater than the set value, the internal resistance of the ignition circuit is determined to be abnormal.

[0028] When R 差异 If the resistance is not greater than the set value, the internal resistance of the ignition circuit is considered to be normal.

[0029] Furthermore, in step S2, when determining the ignition energy, the formula is:

[0030] E = 1 ÷ 2 × C × (U0) 2 -U t 2 );

[0031] Where C refers to the capacitance value of the ignition capacitor C1;

[0032] When the ignition energy E is less than the set threshold, it is determined that the ignition capability of the electronic detonator control module under test is insufficient.

[0033] When the ignition energy E is not less than the set threshold, the ignition capability of the electronic detonator control module under test is determined to be sufficient.

[0034] The beneficial effect of this invention is that it can analyze the ignition capability of the electronic detonator control module under test. That is, based on the current discharge curve, the discharge parameters are obtained, and by determining whether the discharge parameters meet the set requirements, it can not only determine the ignition performance of the electronic detonator control module under test, but also screen out the causes of ignition abnormalities, which has good application value. Attached Figure Description

[0035] Figure 1 This is a circuit diagram of the ignition circuit in this invention. Detailed Implementation

[0036] like Figure 1 As shown, the method for detecting abnormal ignition performance of an electronic detonator according to the present invention includes the following steps:

[0037] S1. After receiving the detonation signal, the ignition circuit collects the ignition current data of the ignition circuit in the control module of the electronic detonator under test, and obtains the current discharge curve by sampling the current through the current sensor connected to the ignition circuit based on the ignition current data.

[0038] S2. Based on the current discharge curve, the discharge parameters are obtained. Then, by determining whether the discharge parameters meet the set requirements, the cause of the abnormal ignition of the electronic detonator control module under test can be determined.

[0039] The discharge parameters include the peak value of the ignition current, the current discharge time, the internal resistance of the ignition circuit, and the ignition energy.

[0040] The ignition circuit includes a MOSFET Q1, an ignition capacitor C1, an ignition resistor B1, a resistor R11, and a contact spring J1. One end of the ignition capacitor C1 is connected to the source of the MOSFET Q1, and the other end of the ignition capacitor C1 is connected to one end of the contact spring J1. The other end of the contact spring J1 is connected to one end of both the ignition resistor B1 and the resistor R11. The drain of the MOSFET Q1 is connected to the other ends of both the ignition resistor B1 and the resistor R11. A current sensor is connected between one end of the contact spring J1 and the source of the MOSFET Q1.

[0041] In this invention, when the detonation signal is received, the MOS transistor Q1 receives the detonation signal and turns on. The ignition capacitor C1 discharges to the ignition resistor B1. The MOS transistor Q1 turns on at a speed of nS. The on-resistance Rds of the MOS transistor Q1 is very small and releases instantaneously. At the moment the MOS transistor Q1 turns on, a large current is generated. The current sensor samples the current to obtain the current discharge curve.

[0042] Specifically, the determination is made based on the discharge parameters:

[0043] In step S2, when determining the ignition current peak value, the formula is as follows:

[0044] I 峰值 =U0÷R;

[0045] If the peak ignition current I 峰值 If the current is much lower than the set current, the detonation state of the electronic detonator control module under test is determined to be abnormal.

[0046] If the peak ignition current I 峰值 If the current is not less than the set current, the detonation state of the electronic detonator control module under test is determined to be normal.

[0047] Where U0 is the discharge initiation voltage of the ignition capacitor C1; R is the resistance value of resistor R11.

[0048] In step S2, when determining the result based on the current discharge time, the formula is as follows:

[0049] Δt=t 开始 -t 结束 ;

[0050] If Δt is less than the set time, the discharge time of the electronic detonator control module under test is determined to be abnormal.

[0051] If Δt is not less than the set time, the discharge time of the electronic detonator control module under test is determined to be normal.

[0052] Among them, t 开始 t is the discharge start time of the ignition capacitor C1; 结束 This is the discharge end time of the ignition capacitor C1.

[0053] In step S2, when determining the ignition circuit based on its internal resistance, the following steps are included:

[0054] S2.1 After the ignition capacitor C1 has finished charging, it is discharged according to the formula R0 = R 放电 +R mos1 Obtain the circuit resistance R0 at the start of discharge;

[0055] Among them, R 放电 A fixed resistor for the ignition circuit at the start of discharge;

[0056] R mos1 The internal resistance of MOSFET Q1 at the start of discharge;

[0057] S2.2, According to the formula: R t =R 放电 +R mos2 Obtain the loop resistance R at discharge time t t ;

[0058] Among them, R mos2 Let be the internal resistance of MOSFET Q1 at discharge time t;

[0059] S2.3, Compare R0 and R t The difference in resistance at time points gives us: R 差异 =R mos1 -R mos2 ;

[0060] When R 差异 If the resistance value is greater than the set value, the internal resistance of the ignition circuit is determined to be abnormal.

[0061] When R 差异If the resistance is not greater than the set resistance value, the internal resistance of the ignition circuit is considered to be normal.

[0062] In step S2, when determining the ignition energy, the formula is:

[0063] E = 1 ÷ 2 × C × (U0) 2 -U t 2 );

[0064] Where C refers to the capacitance value of the ignition capacitor C1;

[0065] When the ignition energy E is less than the set threshold, it is determined that the ignition capability of the electronic detonator control module under test is insufficient.

[0066] When the ignition energy E is not less than the set threshold, the ignition capability of the electronic detonator control module under test is determined to be sufficient.

[0067] The value of E varies depending on the agent. For example, agent A requires 1 mJ of energy to ignite, but if the equipment test shows that the calculated energy is less than 1 mJ, then the module's ignition capability is insufficient.

[0068] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0069] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A method for detecting abnormal ignition performance of an electronic detonator, characterized in that: Includes the following steps: S1. After receiving the detonation signal, the ignition current data of the ignition circuit in the control module of the electronic detonator under test is collected, and the current discharge curve is obtained through the ignition current data. S2. Based on the current discharge curve, the discharge parameters are obtained. Then, by determining whether the discharge parameters meet the set requirements, the cause of the abnormal ignition of the electronic detonator control module under test can be determined. The discharge parameters include, but are not limited to, peak ignition current, current discharge time, internal resistance of the ignition circuit, and ignition energy. The ignition circuit includes a MOSFET Q1, an ignition capacitor C1, an ignition resistor B1, a resistor R11, and a contact spring J1. One end of the ignition capacitor C1 is connected to the source of the MOSFET Q1, and the other end of the ignition capacitor C1 is connected to one end of the contact spring J1. The other end of the contact spring J1 is connected to one end of both the ignition resistor B1 and the resistor R11. The drain of the MOSFET Q1 is connected to the other ends of both the ignition resistor B1 and the resistor R11. In step S2, when determining the ignition current peak value, the formula is: I 峰值 = U0÷ R If the ignition current peak value I 峰值 is less than the set current, it is determined that the electronic detonator control module to be tested has an abnormal detonation state. If the peak ignition current I 峰值 If the current is not less than the set current, the detonation state of the electronic detonator control module under test is determined to be normal. Where U0 is the discharge initiation voltage of the ignition capacitor C1; R is the resistance value of resistor R11; In step S2, when determining the discharge time based on the current, the formula is: ∆t=t 开始 -t 结束 ; If ∆t is less than the set time, the discharge time of the electronic detonator control module under test is determined to be abnormal. If ∆t is not less than the set time, the discharge time of the electronic detonator control module under test is determined to be normal. Among them, t 开始 t is the discharge start time of the ignition capacitor C1; 结束 This refers to the end time of discharge of the ignition capacitor C1; In step S2, when determining the ignition circuit based on its internal resistance, the following steps are included: S2.1 After the ignition capacitor C1 has finished charging, it is discharged according to the formula R0=R 放电 +R mos1 Obtain the circuit resistance R0 at the start of discharge; Among them, R 放电 A fixed resistor for the ignition circuit at the start of discharge; R mos1 The internal resistance of MOSFET Q1 at the start of discharge; S2.2, According to the formula: R t =R 放电 +R mos2 Obtain the loop resistance R at discharge time t t ; Among them, R mos2 Let be the internal resistance of MOSFET Q1 at discharge time t; S2.3, Compare R0 and R t The difference in resistance at time points gives us: R 差异 =R mos1 -R mos2 ; When R 差异 If the resistance value is greater than the set value, the internal resistance of the ignition circuit is determined to be abnormal. When R 差异 If the resistance is not greater than the set value, the internal resistance of the ignition circuit is considered to be normal. In step S2, when determining the ignition energy, the formula is: E=1÷2×C×(U0 2 -U t 2 ); Where C refers to the capacitance value of the ignition capacitor C1; When the ignition energy E is less than the set threshold, it is determined that the ignition capability of the electronic detonator control module under test is insufficient. When the ignition energy E is not less than the set threshold, the ignition capability of the electronic detonator control module under test is determined to be sufficient.

2. The method for detecting abnormal ignition performance of an electronic detonator according to claim 1, characterized in that: In step S1, after receiving the detonation signal, the ignition circuit obtains the current discharge curve by sampling the current through a current sensor connected to the ignition circuit.

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