A system and method for detecting the value of the voltage of the capacitor of an electronic detonator

Abstract

The application provides a detection system and method for the capacitance voltage value of an electronic detonator, solves the problem that the working voltage and the detonation voltage are insufficient due to the abnormality of the capacitor itself in the detonator module of the electronic detonator, such as abnormal leakage of the capacitor, and the problem of misfire and delayed explosion caused thereby, the controller module adjusts the resistance value of the sampling resistor unit by controlling the switch of the controllable switch, so that the voltage of the first input end of the input comparator changes correspondingly, when the ratio of the voltage of the first input end of the input comparator to the reference voltage changes, the output level signal of the comparator flips, the controller module calculates the range interval in which the to-be-detected capacitance voltage value is located according to the resistance value of the sampling resistor unit before and after the output level signal of the comparator flips, and compares the range interval in which the to-be-detected capacitance voltage value is located with the design value, so as to judge whether the to-be-detected capacitance works normally, and the reliability and safety of the electronic detonator are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic detonator, and particularly relates to a detection system and method for a capacitor voltage value of an electronic detonator. BACKGROUND

[0002] Electronic detonators have been widely recognized in modern blasting operations due to their safety, convenience and controllability. However, these characteristics of electronic detonators are derived from the perfect match of multiple disciplines. The most core match is that the energy of the initiation capacitor can completely ignite the detonating agent, thereby ensuring the perfect operation of the electronic detonator.

[0003] The energy required by the firing head of electronic detonators of different manufacturers also has differences, which is reflected on the capacitor. The voltage of the charged capacitor required for initiation will have differences. It is a problem to be solved that detecting electronic detonators after large-scale networking, judging whether the charged initiation capacitor meets the initiation requirement, and avoiding misfire during detection. In addition, there is a working capacitor in the electronic detonator. In order to ensure that the electronic detonator can normally initiate, it is necessary to detect whether the working capacitor is abnormal and other abnormal leakage causes abnormal working voltage and initiation voltage. SUMMARY

[0004] The present application provides a detection system and method for a capacitor voltage value of an electronic detonator, which can detect the capacitor voltage value in the electronic detonator, greatly improve the reliability and safety of the electronic detonator, and reduce the problems of misfire and delayed explosion.

[0005] The technical scheme is as follows: a detection system for a capacitor voltage value of an electronic detonator, characterized by comprising the following in connection:

[0006] A power supply module for providing a test voltage;

[0007] A to-be-tested capacitor access module for accessing a to-be-tested capacitor;

[0008] A sampling module connected with the power supply module and the to-be-tested capacitor access module, the sampling module comprising a sampling resistor unit, the sampling resistor unit comprising a plurality of series-connected resistors;

[0009] A capacitor voltage detection output module, the capacitor voltage detection output module comprising a comparator, one end of each resistor of the sampling resistor unit being connected to a first input terminal of the comparator after being connected to a controllable switch, a second input terminal of the comparator being connected with a reference voltage generating unit, and the reference voltage generating unit being used for generating a reference voltage;

[0010] A controller module and a signal conversion module connected to the output end of the comparator, the signal conversion module being connected to the controller module for signal conversion;

[0011] The signal conversion module is connected to a controllable switch, and the controller module adjusts the resistance value of the sampling resistance unit by controlling the switch of the controllable switch, so that the voltage input into the first input end of the comparator changes correspondingly; when the ratio of the voltage input into the first input end of the comparator to the reference voltage changes, the output level signal of the comparator flips, and the controller module calculates the range interval in which the to-be-measured capacitor voltage value is located according to the resistance value of the sampling resistance unit before and after the output level signal of the comparator flips, compares the range interval in which the to-be-measured capacitor voltage value is located with a design value, and judges whether the to-be-measured capacitor works normally.

[0012] Further, the controllable switch is a switch tube, the drain electrode of the switch tube is connected to the first input end of the comparator, the source electrode of the switch tube is connected to one end of the resistance in the sampling resistance unit, and the gate electrode of the switch tube is connected to the input-output interface of the signal conversion module.

[0013] Further, the sampling module includes a protection resistance connected in series with the sampling resistance unit and then grounded.

[0014] Further, the to-be-measured capacitor includes a working capacitor and an initiating capacitor, two sampling modules corresponding to the working capacitor and the initiating capacitor are provided, the power supply module is connected to the two sampling modules and the two to-be-measured capacitor access modules respectively for power supply, and the sampling module and the to-be-measured capacitor access module are connected in parallel.

[0015] Further, the output end of the comparator is sequentially connected to a Schmitt trigger and a first inverter and then connected to the input-output interface of the signal conversion module.

[0016] Further, first and second switching MOS tubes are respectively arranged between the two sampling resistance units and the first input end of the comparator, the gate electrode of the first switching MOS tube is connected to the input-output interface of the signal conversion module, the source electrodes of the first and second switching MOS tubes are connected together and connected to the first input end of the comparator, and the drain electrodes of the drain electrodes of the first switching MOS tube and the second switching tube are connected to the sampling resistance unit.

[0017] Further, the controller module adopts a two-wire communication controller of electronic detonator, and the controller module also serves as a power supply module to supply power, the controller module is connected with a rectifier module, an output end of the rectifier module is connected with the working capacitor for charging the working capacitor, an output end of the rectifier module is connected with a constant current power supply, and an output end of the constant current power supply is connected with the initiation capacitor for charging the initiation capacitor. The signal conversion module outputs S_charge, S_discharge, S_fire, S_0 and S1-SN, wherein S_charge is connected to the constant current power supply, S_discharge is connected to the discharge module 700, S_fire is connected to the firing initiation module H08, S0 is connected to the capacitor voltage detection output module 400, and S1-SN are connected to the working capacitor voltage sampling module 200 and the initiation capacitor voltage sampling module 300.

[0018] Further, the constant current power supply is also connected with the discharge module and grounded, and is used for discharging the initiation capacitor.

[0019] The sampling unit of the working capacitor has the following connection relationship: one end of a first capacitor C1 is connected with VCC, and one end is connected with GND to form a first loop; an Rup1 resistor has one end connected with VCC and one end connected with the drain end of an R1N and N1N tube; the source end of the N1N tube is connected with Y10, and the gate level is connected with SN; one end of the R1N is connected with R1... and N1... tubes, wherein "..." represents omitted multiple, the source end is connected with Y10, and the gate level is connected with S...; one end of the R1... is connected with the drain end of an R14 and N14 tube, the source end of the N14 tube is connected with Y10, and the gate is connected with S4; one end of the R14 is connected with the drain end of an R13 and N13 tube, the source end of the N13 tube is connected with Y10, and the gate is connected with S3; one end of the R13 is connected with the drain end of an R12 and N12 tube, the source end of the N12 tube is connected with Y10, and the gate is connected with S2; one end of the R12 is connected with the drain end of an R11 and N11 tube, the source end of the N11 tube is connected with Y10, and the gate is connected with S1; one end of the R11 is connected with GND.

[0020] The constant current power supply has one end connected with VCC and one end connected with VCAP, and is controlled by the S_charge signal.

[0021] The sampling module of the ignition capacitor voltage is connected as follows: one end of the second capacitor C2 is connected to VCAP, and one end is connected to GND, forming a second loop; one end of the Rup2 resistor is connected to VCAP, and one end is connected to the drain end of the N2N tube and the R2N tube; the source end of the N2N tube is connected to Y20, and the gate level is connected to SN; one end of the R2N tube is connected to the R2... and N2... tubes, and the source end is connected to Y20, and the gate level is connected to S...; one end of the R2... tube is connected to the drain end of the R24 and N24 tubes, and the source end of the N24 tube is connected to Y20, and the gate is connected to S4; one end of the R24 tube is connected to the drain end of the R23 and N23 tubes, and the source end of the N23 tube is connected to Y20, and the gate is connected to S3; one end of the R23 tube is connected to the drain end of the R22 and N22 tubes, and the source end of the N22 tube is connected to Y20, and the gate is connected to S2; one end of the R22 tube is connected to the drain end of the R21 and N21 tubes, and the source end of the N21 tube is connected to Y20, and the gate is connected to S1; one end of the R21 tube is connected to GND;

[0022] The capacitor voltage detection output module, the reference voltage generation module is connected to the V+ of the comparator, which is the second input end of the comparator, and is the Vref signal; the comparator V- is the first input end of the comparator, and is connected to the source end of the N10 tube and the source end of the N20 tube; the drain end of the N10 tube is connected to Y10, and the drain end of the N20 tube is connected to Y20; the gate of the N10 is connected to S0, and the input end of INV2; the gate of the N20 is connected to the output end of INV2; the comparator output module is connected to the input end of SIM1, and the output end of SIM1 is connected to the input end of INV1; the output end of INV1 is V_out, and is connected to the signal conversion module;

[0023] The discharge module is connected to VCAP at one end and GND at the other end, and is controlled by the S_discharge signal;

[0024] The firing and ignition module is connected to VCAP at one end and GND at the other end, and is controlled by the S_fire signal.

[0025] A method for detecting the capacitor voltage value of an electronic detonator, based on the above-mentioned detection system for the capacitor voltage value of an electronic detonator, the method comprising the following steps:

[0026] By controlling the switch of the controllable switch, the resistance value of the sampling resistance unit is stepped up, so that the voltage value sampled by the first input end of the comparator is stepped down; when the voltage input into the first input end of the comparator is less than the reference voltage, the output level signal of the comparator is flipped; the controller module calculates the range interval of the to-be-detected capacitor voltage value according to the resistance value of the sampling resistance unit before and after the flipping of the output level signal of the comparator; the controller module compares the range interval of the to-be-detected capacitor voltage value obtained with the design value to determine whether the to-be-detected capacitor is working normally.

[0027] Further, the number and resistance value of the resistors connected in series in the sampling resistor unit are adjusted to change the amplitude of the voltage change input to the first input terminal of the comparator.

[0028] The electronic detonator capacitor voltage detection circuit of the present application can detect the voltage value of the capacitor in the electronic detonator to be used, can effectively detect the problems of abnormal working voltage and detonation voltage caused by large-scale networking abnormalities of the electronic detonator, abnormalities of the capacitor itself in the detonator module, and other abnormal leakage problems, avoids the problems of misfire and delayed explosion, greatly improves the reliability and safety of the electronic detonator, and reduces the probability of misfire and delayed explosion. Meanwhile, the detection system for the capacitor voltage value of the electronic detonator of the present application separates the working capacitor and the detonation capacitor, and the detonation module has no voltage before the detonation capacitor is charged, so that misexplosion caused by abnormal reasons is avoided, the problem of misexplosion is reduced, and the reliability and safety are improved. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 A detection system block diagram for the capacitor voltage value of the electronic detonator in the embodiment;

[0030] Figure 2 A schematic diagram of voltage sampling of the sampling module of the working capacitor voltage and the sampling module of the detonation capacitor voltage in the detection system for the capacitor voltage value of the electronic detonator in the embodiment;

[0031] Figure 3 A schematic diagram of the signal conversion module generating S0-SN and receiving VOUT in the embodiment. DETAILED DESCRIPTION

[0032] See Figure 1 、 Figure 2 The detection system for the capacitor voltage value of the electronic detonator of the present application comprises the following components connected in series:

[0033] The power supply module 100 is used for providing a test voltage;

[0034] The capacitor to be tested access module 200 is used for accessing the capacitor to be tested;

[0035] The sampling module 300 is connected with the power supply module 100 and the capacitor to be tested access module 200, and the sampling module 300 comprises a sampling resistor unit 310, and the sampling resistor unit 310 comprises a plurality of resistors connected in series;

[0036] The capacitor voltage detection output module 400 comprises a comparator, one end of each resistor of the sampling resistor unit 310 is connected to the first input end of the comparator after connecting a controllable switch respectively, the second input end of the comparator is connected with the reference voltage generation unit 410, and the reference voltage generation unit 410 is used for generating a reference voltage.

[0037] The controller module 500 and the signal conversion module 600, the signal conversion module 600 is connected with the output end of the comparator, the signal conversion module 600 is connected with the controller module 500, and is used for signal conversion, and the conversion of the signal sent to the controller module and the signal sent by the controller module;

[0038] The signal conversion module 600 is connected with the controllable switch, the controller module 500 adjusts the resistance value of the sampling resistor unit 310 by controlling the switch of the controllable switch, so that the voltage of the first input end input into the comparator corresponds to change, when the ratio of the voltage of the first input end input into the comparator and the reference voltage changes, the output level signal of the comparator flips, the controller module 500 calculates the range interval where the to-be-measured capacitor voltage value is located according to the resistance value of the sampling resistor unit 310 before and after the output level signal of the comparator flips, and the controller module 500 compares the range interval where the to-be-measured capacitor voltage value is located with a design value to determine whether the to-be-measured capacitor works normally.

[0039] In an embodiment, the controller module 500 steps up the resistance value of the sampling resistor unit 310 by controlling the switch of the controllable switch, so that the voltage value sampled by the first input end input into the comparator corresponds to step down, when the voltage of the first input end input into the comparator is less than the reference voltage, the output level signal of the comparator flips, the controller module 500 calculates the range interval where the to-be-measured capacitor voltage value is located according to the resistance value of the sampling resistor unit 310 before and after the output level signal of the comparator flips, and the controller module 500 compares the range interval where the to-be-measured capacitor voltage value is located with a design value to determine whether the to-be-measured capacitor works normally.

[0040] In addition, the number and resistance value of the resistors connected in series in the sampling resistor unit 310 are adjusted to change the amplitude of the voltage change of the first input end input into the comparator.

[0041] In the embodiment of the application, the controllable switch adopts a switch tube, the drain electrode of the switch tube is connected with the first input end of the comparator, the source electrode of the switch tube is connected to one end of the resistor in the sampling resistor unit 310, and the gate electrode of the switch tube is connected to the input and output interface of the signal conversion module.

[0042] In the embodiment of the application, the sampling module comprises a protection resistor, and the protection resistor is connected in series with the sampling resistor unit 310 and then grounded.

[0043] In the embodiment of the present application, the to-be-tested capacitances include a working capacitance and an initiating capacitance, two sampling modules are provided for the working capacitance and the initiating capacitance, a power supply module is connected to the two sampling modules and the two to-be-tested capacitance access modules respectively, and is used for power supply, and the sampling module and the to-be-tested capacitance access module are connected in parallel.

[0044] In the embodiment of the present application, the output end of the comparator is sequentially connected to the input-output interface of the signal conversion module after being connected to the Schmitt trigger and the first inverter.

[0045] In the embodiment of the present application, the first and second switching MOS tubes are respectively arranged between the two sampling resistance units 310 and the first input end of the comparator, the gate of the first switching MOS tube is connected to the input-output interface of the signal conversion module, the source of the first and second switching MOS tubes is connected together and connected to the first input end of the comparator, the drain of the drain of the first switching MOS tube and the second switching MOS tube is connected to the sampling resistance unit, the controller module 500 sends a control signal to the signal conversion module 600, and the first switching MOS tube or the second switching MOS tube can be switched on, so as to realize switching of the to-be-tested working capacitance and initiating capacitance.

[0046] In the embodiment of the present application, the controller module 500 adopts a double-line communication controller of an electronic detonator, the controller module 500 also serves as the power supply module 100 for power supply, the controller module 500 is connected to the rectifier module 110, the output end of the rectifier module 110 is connected to the working capacitance, and is used for charging the working capacitance, the output end of the rectifier module 110 is connected to the constant-current power supply 120, the output end of the constant-current power supply 120 is connected to the initiating capacitance, and is used for charging the initiating capacitance.

[0047] In addition, the constant-current power supply 120 is also connected to the ground after being connected to the discharge module 700, and is used for discharging the initiating capacitance.

[0048] Specifically, in the detection system for the capacitance voltage value of the electronic detonator in an embodiment of the present application, the working capacitance and the initiating capacitance can be detected, and specifically in the embodiment,

[0049] The controller module 500 adopts a double-line communication controller H01 in the electronic detonator, the double-line communication controller H01 has the functions of the controller module 500 and the power supply module 100, the double-line communication controller H01 can also serve as the power supply module for power supply, the double-line communication controller H01 is connected to the rectifier module 110 through BUS1 and BUS2, and BUS1 and BUS2 are connected to the signal conversion module 600;

[0050] The signal conversion module 600 has input and output ports and can output signals S_charge, S_discharge, S_fire, S_0 and S1-SN. S_charge is connected to the constant current power supply 120, S_discharge is connected to the discharging module 700, S_fire is connected to the firing and initiating module, S0 is connected to the capacitor voltage detection output module 400, and S1-SN are connected to the working capacitor voltage sampling module H04 and the initiating capacitor voltage sampling module H06.

[0051] The rectifier module 110 is connected to the working capacitor C1, and the voltage on the working capacitor C1 after charging is complete is VCC.

[0052] The working capacitor voltage sampling module H04 includes a protection resistor RCUP1, and the sampling resistor unit includes a plurality of series-connected resistors R11, R12, R13, R14...R1N, a total of N resistors. The number and size of the resistors in the sampling resistor unit 310 can be set according to the detection accuracy as needed, and the controllable switch uses a MOS tube.

[0053] One end of the protection resistor Rup1 is connected to VCC, and the other end is connected to the resistor R1N and the drain of the MOS tube N1N. The source of the N1N tube is connected to Y10, and the gate of the N1N tube is connected to SN of the signal conversion module 600. The two ends of R1N are respectively connected to R1N and R1(N-1). Resistors R1(N-1)...R14, R13, R12, R11 are connected in series. Resistors R1(N-1)...R14, R13, R12, R11 are respectively connected to MOS tubes N1(N-1)...N14, N13, N12, N11. The sources of MOS tubes N1(N-1)...N14, N13, N12, N11 are connected to Y10, and the drains are respectively connected to resistors R1(N-1)...R14, R13, R12, R11. The gates are connected to SN-1...S4, S3, S2, S1 of the signal conversion module 600. One end of R11 is grounded.

[0054] One end of the constant current power supply 120 is connected to the rectifier module 110, and the other end outputs a voltage VCAP. The voltage VCAP charges the initiating capacitor C2, which is controlled by the S_charge signal.

[0055] The initiating capacitor voltage sampling module H06 has the following connection relationship: it includes a protection resistor RCUP2, and the sampling resistor unit includes a plurality of series-connected resistors R21, R22, R23, R24...R2N, a total of N resistors. The number and size of the resistors in the sampling resistor unit can be set according to the detection accuracy as needed, and the controllable switch uses a MOS tube.

[0056] One end of the protection resistor Rup2 is connected to VCC, and the other end is connected to the resistor R2N and the drain of the MOS tube N2N; the source of the N2N tube is connected to Y20, and the gate of the N2N tube is connected to SN of the signal conversion module 600; the two ends of R2N are respectively connected to the resistor R2N and the resistor R2(N-1), and the resistors R2(N-1),..., R24, R23, R22, R21 are connected in series, and the MOS tubes N2(N-1),..., N24, N23, N22, N21 are respectively connected to the resistors R2(N-1),..., R24, R23, R22, R21, the sources of the MOS tubes N2(N-1),..., N24, N23, N22, N21 are connected to Y20, the drains are respectively connected to the resistors R2(N-1),..., R24, R23, R22, R21, and the gates are connected to SN-1,..., S4, S3, S2, S1 of the signal conversion module 600; one end of the resistor R21 is grounded.

[0057] The discharge module 700 is connected to VCAP at one end and GND at the other end, and is controlled by the S_discharge signal;

[0058] The fire initiation module H08 is connected to VCAP at one end and GND at the other end, and is controlled by the S_fire signal;

[0059] The capacitor voltage detection output module 400 is connected to V+ of the comparator, and the reference voltage is Vref; the V- of the comparator module is connected to the source of the first switching MOS tube N10 and the source of the second switching MOS tube N20, the drain of the first switching MOS tube N10 is connected to Y10, the drain of the second switching MOS tube N20 is connected to Y20, the gate of the first switching MOS tube N10 is connected to S0, S0 is connected to the input end of the second inverter INV2, and the gate of the second switching MOS tube N20 is connected to the output end of INV2; the output of the comparator is connected to the input end of the Schmitt trigger SIM1, the output end of the Schmitt trigger SIM1 is connected to the input end of the first inverter INV1, the output end of the first inverter INV1 is V_out, and is connected to the signal conversion module 600,

[0060] The Schmitt trigger SIM1 prevents misjudgment here, because the Schmitt trigger SIM1 has hysteresis when it is turned on and turned off. To ensure that the output value of the operational amplifier is consistent, the output level of the inverter and the output level of the comparator are kept consistent after passing through the Schmitt trigger SIM1 and the inverter INV1, for example, if the output V0 of the comparator is high, the output of the inverter is also high.

[0061] In the embodiment of the application, a method for detecting the capacitor voltage value of an electronic detonator is also provided, which is realized based on the above-mentioned detection system for the capacitor voltage value of an electronic detonator, and the method comprises the following steps:

[0062] The resistance value of the sampling resistance unit is stepped up by controlling the switch of the controllable switch, so that the voltage value sampled by the first input end of the input comparator corresponds to step-down, and the output level signal of the comparator is flipped when the voltage of the first input end of the input comparator is less than the reference voltage. The controller module calculates the range interval where the to-be-measured capacitor voltage value is located according to the resistance value of the sampling resistance unit before and after the output level signal of the comparator is flipped, controls the range interval where the to-be-measured capacitor voltage value is located through comparison, judges whether the to-be-measured capacitor works normally, and adjusts the number and resistance value of the resistance connected in series with the sampling resistance unit to change the amplitude of the voltage change of the first input end of the input comparator.

[0063] In combination Figure 3 , the working process of the detection method for the capacitor voltage value of the electronic detonator in the embodiment is described below;

[0064] The power supply is performed by the dual-line communication controller as the controller module and the power supply module, the working capacitor C1 is charged through the rectification module, the VCC voltage on the working capacitor C1 gradually rises, and the circuit enters a normal working state;

[0065] After the circuit enters the normal working state, the dual-line communication controller sends a working voltage detection communication signal, and the signal conversion module outputs S0=1, the first switching MOS tube N10 is turned on, and the detection of the working capacitor C1 can be performed;

[0066] Then the dual-line communication controller sends a working voltage detection communication signal, and the signal conversion module outputs S1-SN=1, the signals of S1-SN can switch the MOS tubes N11, N12, N13, N14, …, N1N in turn, and with the switching on of the MOS tubes, the resistance value of the sampling resistance unit 310 is stepped up each time, the voltage value sampled by the first input end of the input comparator corresponds to step-down, and since the reference voltage input by the second input end of the comparator is unchanged, the level output by the comparator will be flipped with the switching on of the MOS tubes. Because the sampling resistance unit is in series connection, the current is equal, that is, (capacitor voltage value / total resistance)=(reference voltage value / sampled resistance), and after rearrangement, there is a formula:

[0067] Capacitor voltage value=(total resistance*reference voltage value) / sampled resistance

[0068] Each time the resistance changes, the capacitor voltage value at this time can be detected, and the resistance values of the sampling resistance units before and after the level flip are fed back to the dual-line communication controller, which can calculate the range interval of the measured capacitor voltage value. The controller module compares the range interval of the measured capacitor voltage value with the design value, and according to the working capacitor voltage value state, it can be judged whether the electronic detonator in the network has an abnormality. If there is an abnormality, the scene is improved or replaced.

[0069] In the embodiment, the specific working capacitor voltage detection mechanism is described as follows:

[0070] When S0=1, N10 is opened, Y10 is connected to the V- end of the comparator, and according to the virtual short principle of the operational amplifier, V+ = V- = Vref is known. It is known that the total resistance on the sampling module of the working capacitor is RA = R11 + R12 + R13 + R14 + R1... + R1N + Rup1.

[0071] When S1=1, S2-SN=0, the resistance on the equivalent sampling resistance R_Y10 at this time is R11, and the VCC voltage is calculated as follows:

[0072] After arrangement, we get→

[0073] When S2=1, S1=0, S3-SN=0, the resistance on R_Y10 is R11+R12, and the VCC voltage is calculated as follows: After arrangement, we get→

[0074] When S3=1, S1-S2=0, S4-SN=0, the resistance on R_Y10 is R11+R12+R13, and the VCC voltage is calculated as follows:

[0075] After arrangement, we get→

[0076] When S4=1, S1-S3=0, S5-SN=0, the resistance on R_Y10 is R11+R12+R13+R14, and the VCC voltage is calculated as follows:

[0077] After arrangement, we get→

[0078] When SN=1, S1-SN-1=0, the resistance on R_Y10 is R11+R12+R13+R14+R1... +R1N, and the VCC voltage is calculated as follows:

[0079] After arrangement, we get→

[0080] The VCC calculated when S1=1 and SN=1 is the maximum value and the minimum value that can be compared with the reference voltage Vref to cause level inversion, when the voltage on the working capacitor is greater than the VCC1 voltage when S1=1, the V+ input to the comparator is always greater than Vref, when the voltage on the working capacitor is less than the VCCN voltage when SN=1, the V+ input to the comparator is always less than Vref, only when the voltage on the working capacitor is between VCC1 and VCCN, changing the size of the sampling resistor can cause the change of the output level of the comparator, according to the timing of the level inversion of the comparator,

[0081] The comparison result of the change of the comparator output is fed back to the dual-line communication controller through the Schmidt trigger SIM1, the first inverter INV1, the V_out signal output, the signal conversion module, the dual-line communication controller calculates the range interval of the voltage value of the to-be-detected capacitor according to the resistance value of the sampling resistor unit 310 before and after the output level signal of the comparator inverts, and the controller module judges whether the to-be-detected capacitor works normally by comparing the range interval of the to-be-detected capacitor voltage value obtained with the design value, at this time, according to the state of the working capacitor voltage value, it can be judged whether the electronic detonator in the networking has an abnormality, and the abnormality is excluded, improved or replaced on site. The actual detection voltage precision, that is, the size of the range interval of the to-be-detected capacitor voltage value, can be designed according to the required sampling resistor ratio.

[0082] The sampling mechanism of the initiating capacitor is consistent, and the ratio of the sampling resistor and the detection precision can be set according to requirements.

[0083] The detection system for the capacitor voltage value of the electronic detonator provided in the embodiment of the application detects the working capacitor and the initiating capacitor separately, the initiating module is not powered on before the initiating capacitor is charged, and misexplosion caused by abnormal reasons is avoided, the misinitiation problem is reduced, and the reliability and safety are improved; the constant current charging module protects the working capacitor voltage VCC, if the charging current is not limited, under a large current, the working voltage VCC is pulled down too low, the working voltage VCC exits the normal state, and the circuit is restarted; the discharge module is set to discharge the initiating capacitor, so that there is no electricity on the initiating capacitor, and the misfire and delay problems caused by capacitor abnormalities are greatly reduced.

[0084] The above-mentioned serial numbers of the embodiments of the present application are only for description, and do not represent the advantages and disadvantages of the embodiments. The methods disclosed in the several method embodiments provided by the present application can be combined arbitrarily without conflict to obtain new method embodiments. The features disclosed in the several product embodiments provided by the present application can be combined arbitrarily without conflict to obtain new product embodiments. The features disclosed in the several method or device embodiments provided by the present application can be combined arbitrarily without conflict to obtain new method embodiments or device embodiments.

[0085] The above merely describes the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A system for detecting the value of the voltage of the capacitance of an electronic detonator, characterized by, The application relates to a capacitor testing device, which comprises the following parts connected in sequence: a power supply module for providing a test voltage; a capacitor access module for accessing a capacitor to be tested; a sampling module connected with the power supply module and the capacitor access module, the sampling module comprising a sampling resistor unit, the sampling resistor unit comprising a plurality of series-connected resistors; a capacitor voltage detection output module, the capacitor voltage detection output module comprising a comparator, one end of each resistor of the sampling resistor unit being connected to a first input end of the comparator through a controllable switch, a second input end of the comparator being connected with a reference voltage generation unit, and the reference voltage generation unit being used for generating a reference voltage; a controller module and a signal conversion module, the signal conversion module being connected with an output end of the comparator, the signal conversion module being connected with the controller module and being used for signal conversion; the signal conversion module being connected with the controllable switch, the controller module adjusting resistor values of the sampling resistor unit by controlling switching of the controllable switch, so that a voltage input into the first input end of the comparator changes correspondingly, when a ratio of the voltage input into the first input end of the comparator to the reference voltage changes, an output level signal of the comparator flips, the controller module calculates a range interval in which a capacitor voltage value to be tested is located according to resistor values of the sampling resistor unit before and after the output level signal of the comparator flips, and compares the range interval in which the capacitor voltage value to be tested is located with a design value, so as to judge whether the capacitor to be tested works normally; the capacitor to be tested comprising a working capacitor and an initiating capacitor, two sampling modules corresponding to the working capacitor and the initiating capacitor being arranged, the power supply module being connected with the two sampling modules and the two capacitor access modules and being used for power supply, and the sampling modules and the capacitor access modules being connected in parallel; first and second switching MOS tubes being arranged between the two sampling resistor units and the first input end of the comparator, a gate of the second switching MOS tube being connected with an output end of a second inverter, an input end of the second inverter and a gate of the first switching MOS tube being connected together and then being connected to an input and output interface of the signal conversion module, a source of the first and second switching MOS tubes being connected together and then being connected to the first input end of the comparator, and a drain of the first switching MOS tube being connected to a drain of the second switching MOS tube.

2. A system for detecting the value of the voltage of the capacitor of an electronic detonator according to claim 1, characterized in that: The controllable switch adopts a switching tube, a drain of the switching tube being connected with the first input end of the comparator, a source of the switching tube being connected to one end of a resistor in the sampling resistor unit, and a gate of the switching tube being connected to the input and output interface of the signal conversion module.

3. A system for detecting the value of the voltage of the capacitor of an electronic detonator according to claim 1, characterized in that: The sampling module comprises a protection resistor, the protection resistor being connected with the sampling resistor unit in series and then being grounded.

4. A system for detecting the value of the voltage of the capacitor of an electronic detonator according to claim 1, characterized in that: An output end of the comparator is sequentially connected with a Schmitt trigger and a first inverter and then is connected to the input and output interface of the signal conversion module.

5. A system for detecting the value of the voltage of the capacitor of an electronic detonator according to claim 1, characterized in that: The controller module adopts a two-wire communication controller of an electronic detonator, and also serves as a power supply module to supply power, and is connected with a rectifier module, an output end of the rectifier module is connected with the working capacitor for charging the working capacitor, and the output end of the rectifier module is connected with a constant current power supply, and an output end of the constant current power supply is connected with the initiation capacitor for charging the initiation capacitor.

6. A system for detecting the value of the voltage of the capacitor of an electronic detonator according to claim 5, characterized in that: The constant current power supply is further connected with a discharge module for discharging the initiation capacitor.

7. A method for detecting the value of the voltage of the capacitance of an electronic detonator, characterized by: The method for detecting the voltage value of the capacitor of the electronic detonator based on claim 1 comprises the following steps: The resistance value of the sampling resistance unit is stepwise increased by controlling the switch of the controllable switch, so that the voltage value sampled by the first input end of the comparator is stepwise decreased, the output level signal of the comparator is inverted when the voltage input into the first input end of the comparator is less than the reference voltage, the controller module calculates the range interval of the voltage value of the capacitor to be detected according to the resistance value of the sampling resistance unit before and after the inversion of the output level signal of the comparator, and judges whether the capacitor to be detected works normally by comparing the range interval of the voltage value of the capacitor to be detected obtained by the controller module with the design value.

8. A method for detecting the value of the voltage of a capacitor of an electronic detonator according to claim 7, characterized in that: The number and resistance value of the resistors connected in series with the sampling resistance unit are adjusted to change the amplitude of the voltage change input into the first input end of the comparator.

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