CN113075455A - Electronic detonator bridge wire resistance detection method and device, electronic detonator and system - Google Patents
Electronic detonator bridge wire resistance detection method and device, electronic detonator and system Download PDFInfo
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- CN113075455A CN113075455A CN202010008344.2A CN202010008344A CN113075455A CN 113075455 A CN113075455 A CN 113075455A CN 202010008344 A CN202010008344 A CN 202010008344A CN 113075455 A CN113075455 A CN 113075455A
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Abstract
The invention provides a method and a device for detecting bridge wire resistance of an electronic detonator, the electronic detonator and a system, wherein the method comprises the following steps: acquiring a detection instruction; charging the energy storage capacitor according to the detection instruction so as to enable the voltage value of the energy storage capacitor to rise to a target initial voltage value; controlling the discharging module to discharge the energy storage capacitor so as to reduce the voltage value of the energy storage capacitor to a target final value voltage value, and recording the discharging time length for reducing the voltage value of the energy storage capacitor to the target final value voltage value; the discharge module comprises a bridge wire resistor and a discharge resistor; calculating the resistance value of the bridge wire resistor according to the resistance value of the discharge resistor, the discharge time, the target initial voltage value and the target final voltage value; and sending the resistance value of the bridge wire resistor to the detection equipment so that the detection equipment generates a detection result according to the resistance value of the bridge wire resistor. The invention can measure the resistance value of the bridge wire, and can judge the quality of the bridge wire more accurately according to the resistance value of the bridge wire resistor, thereby improving the reliability of bridge wire detection and the safety of detonator use.
Description
Technical Field
The invention relates to the technical field of detonator detection, in particular to a method and a device for detecting bridge wire resistance of an electronic detonator, the electronic detonator and a system.
Background
The electronic detonator is required to carry out self-checking on all functions before use, wherein the self-checking of the bridge wire resistance of the detonator is an especially important part, because the detonator can normally fire and finally detonate the explosive only if the bridge wire is qualified, otherwise, the electronic detonator can generate misfire and cause the detonator and the explosive which are not detonated to remain in a blasting field, and the excavator directly excavates and detonates the potential safety hazard of the detonator or the explosive when deslagging is caused, thereby causing damage to mechanical equipment and even personal injury, and therefore, the self-checking of the bridge wire of the detonator before leaving a factory is necessary. The existing detection scheme has the problem that the accuracy of judging the quality of the bridge wire is to be further improved.
Disclosure of Invention
The invention provides a method and a device, which can accurately judge whether the bridge wire is good or not, and improve the reliability of bridge wire detection and the safety of detonator use.
In a first aspect, an embodiment of the present invention provides a method for detecting bridge wire resistance of an electronic detonator, which is applied to an electronic detonator, and the method includes: acquiring a detection instruction; the detection instruction comprises a target initial voltage value and a target final voltage value of the energy storage capacitor; charging the energy storage capacitor according to the detection instruction so as to enable the voltage value of the energy storage capacitor to rise to the target initial voltage value; controlling a discharging module to discharge the energy storage capacitor according to the detection instruction so as to enable the voltage value of the energy storage capacitor to be reduced to the target final value voltage value, and recording the discharging time length for the voltage value of the energy storage capacitor to be reduced to the target final value voltage value; the discharge module comprises the bridge wire resistor and a discharge resistor; calculating the resistance value of the bridge wire resistor according to the resistance value of the discharge resistor, the discharge time length, the target initial voltage value and the target final voltage value; and sending the resistance value of the bridge wire resistor to detection equipment so that the detection equipment generates a detection result according to the resistance value of the bridge wire resistor.
In a second aspect, an embodiment of the present invention further provides a bridge wire resistance detection device for an electronic detonator, which is applied to an electronic detonator, and the device includes: the acquisition module is used for acquiring a detection instruction; the detection instruction comprises a target initial voltage value and a target final voltage value of the energy storage capacitor; the boosting module is used for charging the energy storage capacitor according to the detection instruction so as to enable the voltage value of the energy storage capacitor to be boosted to the target initial voltage value; the voltage reduction module is used for controlling the discharge module to discharge the energy storage capacitor according to the detection instruction so as to reduce the voltage value of the energy storage capacitor to the target final value voltage value, and recording the discharge time for reducing the voltage value of the energy storage capacitor to the target final value voltage value; the discharge module comprises the bridge wire resistor and a discharge resistor; the calculation module is used for calculating the resistance value of the bridge wire resistor according to the resistance value of the discharge resistor, the discharge time, the target initial voltage value and the target final voltage value; and the sending module is used for sending the resistance value of the bridgewire resistor to detection equipment so that the detection equipment generates a detection result according to the resistance value of the bridgewire resistor.
In a third aspect, an embodiment of the present invention further provides a computer device, which includes a memory and a processor, where the memory stores a computer program that is executable on the processor, and the processor implements the method for detecting bridge wire resistance of an electronic detonator when executing the computer program.
In a fourth aspect, the embodiment of the present invention further provides a computer-readable medium having a non-volatile program code executable by a processor, where the program code causes the processor to execute the above-mentioned bridge wire resistance detection method for an electronic detonator.
The embodiment of the invention has the following beneficial effects: the embodiment of the invention provides a bridge wire resistance detection method and device of an electronic detonator, an electronic detonator and a system, wherein the method can obtain a target initial voltage value and a target final voltage value of an energy storage capacitor by obtaining a detection instruction, the energy storage capacitor is charged according to the detection instruction until the voltage value of the energy storage capacitor is increased to the target initial voltage value, then a discharge module is controlled to discharge the energy storage capacitor so as to reduce the voltage value of the energy storage capacitor to the target final voltage value, the discharge time for reducing the voltage value of the energy storage capacitor from the target initial voltage value to the target final voltage value is recorded, the discharge module comprises a bridge wire resistance and a discharge resistance, finally, the resistance value of the bridge wire resistance is calculated according to the resistance value of the discharge resistance, the discharge time, the target initial voltage value and the target final voltage value, and the resistance value of the bridge wire resistance is sent to a detection device, so that the detection device generates a detection result according to the resistance value of the bridge wire resistor. The embodiment of the invention can measure the resistance value of the bridge wire, more accurately judge the quality of the bridge wire according to the resistance value of the bridge wire resistor, and improve the reliability of bridge wire detection and the safety of detonator use.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flow chart of a bridge wire resistance detection method for an electronic detonator according to an embodiment of the present invention;
FIG. 2 is a schematic block diagram of an electronic detonator structure provided by an embodiment of the invention;
FIG. 3 is a circuit diagram of a bridge wire resistance detection method for an electronic detonator according to an embodiment of the present invention;
FIG. 4 is a block diagram of a bridge wire resistance detection device for an electronic detonator according to an embodiment of the present invention;
fig. 5 is a block diagram of a computer device according to an embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first prior art comprises a signal source, a signal amplification circuit, a level comparison circuit, a result judging device and an LED indicating lamp, wherein the signal source, the signal amplification circuit, the level comparison circuit, the result judging device and the LED indicating lamp judge the on-off condition of a circuit of the magnetoelectric detonator by comparing the influence quantity of a normal coil and an abnormal coil on an original signal.
The second prior art includes a resistor of 100 ohms to 10M ohms, a circuit formed by a common crystal diode and a bridge wire, wherein a first pin of the bridge wire is connected with a cathode of the common crystal diode, and an anode of the diode is connected with an anode of a direct current power supply through a resistor. The on-off condition of the bridge wire is judged by judging the level high-low state of the anode of the diode, and the resistance value of the resistor of the device in the prior art is fixed and cannot be adjusted, so that the safety risk of spontaneous explosion can be caused by low ignition voltage of the bridge wire with low sensitivity when the bridge wire with different sensitivities is detected, and the resistance value of the bridge wire cannot be measured.
Based on the above, the method and the device for detecting the bridge wire resistance of the electronic detonator, the electronic detonator and the system provided by the embodiment of the invention adopt the digital-to-analog converter to adjust the discharge final value of the energy storage capacitor, can be compatible with the detection of the bridge wire resistance with different sensitivities, solve the safety risk of the prior art that the bridge wire with low sensitivity is detected to be ignited and auto-detonated by the device with fixed voltage discharge, utilize the discharge characteristic of the capacitor, reversely calculate the specific value of the bridge wire resistance by measuring the discharge time, can accurately judge the quality of the bridge wire, and greatly improve the reliability of bridge wire detection and the safety of detonator use.
In order to facilitate understanding of the embodiment, a detailed description is first given of a bridge wire resistance detection method for an electronic detonator disclosed in the embodiment of the present invention.
The embodiment of the invention provides a method for detecting bridge wire resistance of an electronic detonator, which is shown in a flow chart of the method for detecting the bridge wire resistance of the electronic detonator shown in figure 1 and comprises the following steps:
step S102, a detection instruction is obtained.
In the embodiment of the invention, the detection instruction is used for starting the bridge wire resistance detection of the electronic detonator, and the detection instruction comprises a voltage value target for charging the energy storage capacitor, namely a target initial voltage value, and also comprises a voltage value target for discharging the energy storage capacitor, namely a target final voltage value.
It should be noted that the energy storage capacitor is provided in the electronic detonator.
And step S104, charging the energy storage capacitor according to the detection instruction so as to enable the voltage value of the energy storage capacitor to rise to the target initial voltage value.
In the embodiment of the invention, after the detection instruction is received, the energy storage capacitor is started to be charged, and the energy storage capacitor is charged according to the target initial voltage value until the voltage value of the energy storage capacitor reaches the target initial voltage value, so that the charging is stopped.
It should be noted that the target initial voltage value may be preset according to an actual requirement and performance of the energy storage capacitor, for example, the target initial voltage value may be a voltage value within a range of 2 to 4V.
Step S106, controlling a discharging module to discharge the energy storage capacitor according to the detection instruction so as to reduce the voltage value of the energy storage capacitor to a target final value voltage value, and recording the discharging time length for reducing the voltage value of the energy storage capacitor to the target final value voltage value; the discharge module comprises a bridge wire resistor and a discharge resistor.
In the embodiment of the invention, after the voltage value of the energy storage capacitor is charged, the discharging module is controlled to discharge the energy storage capacitor until the voltage value of the energy storage capacitor is reduced to the target final value voltage value, and meanwhile, the discharging time length from the discharging starting time to the discharging ending time of the energy storage capacitor is recorded. The discharge module comprises a bridge wire resistor and discharge resistors, the resistance value and the number of the discharge resistors are selected and set according to actual requirements, and comparison in the embodiment of the invention is not specifically limited.
In addition, the target final voltage value needs to be lower than the target initial voltage value when setting.
And step S108, calculating the resistance value of the bridge wire resistor according to the resistance value of the discharge resistor, the discharge time, the target initial voltage value and the target final voltage value.
In the embodiment of the invention, the equivalent resistance value of the discharge module can be obtained by calculating according to the discharge duration, the target initial voltage value and the target final voltage, and the resistance value of the bridge wire resistor can be obtained by calculating based on the resistance value of the discharge resistor and the equivalent resistance value of the discharge module according to the connection relation between the bridge wire resistor and the discharge resistor.
It should be noted that the connection relationship between the bridge wire resistor and the discharge resistor obtained by detecting the instruction may be set, or the connection relationship between the bridge wire resistor and the discharge resistor may be stored in the logic control module in advance so as to be used for calculating the resistance value of the bridge wire resistor.
And step S110, sending the resistance value of the bridge wire resistor to the detection equipment so that the detection equipment can generate a detection result according to the resistance value of the bridge wire resistor.
In the embodiment of the invention, after the resistance value of the bridge wire resistor is obtained through calculation, the resistance value of the bridge wire resistor is sent to the detection equipment, and after the detection equipment obtains the resistance value of the bridge wire resistor, a detection result can be generated. For example, whether the resistance value is within a preset qualified range is judged, if so, the bridge wire resistance can be determined to be qualified, the detonator can enter the next detection, and if not, the detonator is rejected.
The embodiment of the invention provides a bridge wire resistance detection method and device of an electronic detonator, an electronic detonator and a system, wherein the method can obtain a target initial voltage value and a target final voltage value of an energy storage capacitor by obtaining a detection instruction, the energy storage capacitor is charged according to the detection instruction until the voltage value of the energy storage capacitor is increased to the target initial voltage value, then a discharge module is controlled to discharge the energy storage capacitor so as to reduce the voltage value of the energy storage capacitor to the target final voltage value, the discharge time for reducing the voltage value of the energy storage capacitor from the target initial voltage value to the target final voltage value is recorded, the discharge module comprises a bridge wire resistance and a discharge resistance, finally, the resistance value of the bridge wire resistance is calculated according to the resistance value of the discharge resistance, the discharge time, the target initial voltage value and the target final voltage value, and the resistance value of the bridge wire resistance is sent to a detection device, so that the detection device generates a detection result according to the resistance value of the bridge wire resistor. The embodiment of the invention can measure the resistance value of the bridge wire, more accurately judge the quality of the bridge wire according to the resistance value of the bridge wire resistor, and improve the reliability of bridge wire detection and the safety of detonator use.
Considering the purpose of simplifying the internal circuit of the electronic detonator, the electronic detonator comprises a communication module 201, a logic control module 202, a digital-to-analog conversion module 203, a voltage monitoring module 204, a sampling module 205, an energy storage capacitor 206, a current limiting module 207 and a discharging module 208.
The logic control module is respectively and electrically connected with the communication module, the digital-to-analog conversion module, the voltage monitoring module and the discharging module; the voltage monitoring module is electrically connected with the energy storage capacitor through the sampling module; the energy storage capacitor is electrically connected with the current limiting module and the discharging module respectively.
Referring to a schematic block diagram of an electronic detonator structure shown in fig. 2, in the embodiment of the present invention, a digital-to-analog conversion module may be implemented by a digital-to-analog converter, a voltage monitoring module may be implemented by a comparator, a logic control module may be implemented by a logic control unit, a sampling module may be implemented by two resistors, a current limiting module may be implemented by a current limiting resistor, and a discharging module includes a bridge wire resistor and a discharging resistor.
Referring to the circuit diagram of the bridge wire resistance detection method of the electronic detonator shown in fig. 3, modules in the electronic detonator can be connected as shown in the circuit diagram of fig. 3.
The circuit comprises a detection device U1, a rectifying circuit D1, an energy storage capacitor C1, a communication module U2, a digital-to-analog converter U3, a logic control unit U5, a comparator U4, a current limiting resistor R6, resistors R7 and R8, resistors R9 and R10 and a switching tube Q4.
The detection device U1 is connected with two detonator pins LG _1 and LG _2 through a bus to realize the instruction and data transmission with the connected detonator;
the upper end of the communication module U2 is respectively connected with two input ends of detonator pins LG _1 and LG _2 and a rectifying circuit, the lower end of the communication module U2 is connected with a Pin1 of a logic control unit U5, and the communication module U2 receives data or commands sent by a detection device U1 and sends feedback data of the logic control unit U5;
the rectifying circuit D1 is formed by connecting 4 diodes in the sequence shown in figure 3, wherein pins 2 and 4 are connected with detonator pins LG _1 and LG _2 and two input ends of a communication module, pin 3 is connected with a first pin of K1, pin1 is grounded, and forward or reverse voltages input by the pins LG _1 and LG _2 are rectified into a forward voltage VDD;
when the charging switch K1 is closed, VDD charges the energy storage capacitor through the current-limiting resistor R6 to prepare for bridge wire resistance detection;
a first pin of a resistor R8 is connected to the ground, a second pin is connected with the R7 and the positive input end of a comparator U4, a first pin of a resistor R7 is connected with a second pin of a current-limiting resistor R6 and a first pin of an energy-storing capacitor C1, a resistor R9 and a current-limiting resistor QS1, a second pin of the energy-storing capacitor C1 is connected with the ground and is connected with resistors R7 and R8 which are connected in series in parallel, so that the voltage Vc at the middle point of the resistors R7 and R8 is the voltage Vc1 divided value of the energy-storing capacitor C1, and if the ratio of the resistors R7 and R8 is 4:1, Vc 1/5 × Vc1 is obtained, namely when Vc is equal to 1V, Vc1 is 10V;
the positive input end of a comparator U4 is connected with the series-connection middle point of resistors R7 and R8, the negative input end is connected with the analog output end of a digital-to-analog converter U3, the output end of a comparator U4 is connected with a Pin7 of a logic control unit U5, pins 2-Pin 60 of the logic control unit U5 are connected with the digital input end of the digital-to-analog converter, a Pin1 Pin of a logic control unit U5 is connected with the lower end of a communication module U2, a Pin8 Pin of a logic control unit U5 is connected with a first Pin of a switch tube Q4, a third Pin of the switch tube Q4 is connected with the ground, a second Pin of the logic control unit U5 is connected with the parallel connection ends of resistors R9 and R10, the resistor R10 and a bridge resistor QS 10 are connected in parallel, and the parallel connection ends of the resistor R10 and the bridge resistor QS 10 are connected with the first Pin of the energy storage capacitor C10.
In order to obtain an accurate discharge time, the discharge module is controlled to discharge the energy storage capacitor so as to reduce the voltage value of the energy storage capacitor to a target final value voltage value, and the discharge time for reducing the voltage value of the energy storage capacitor to the target final value voltage value is recorded, and the method can be executed according to the following steps:
sending the target final value voltage value to a digital-to-analog conversion module so that the digital-to-analog conversion module generates an analog voltage value according to the target final value voltage value; sending a discharging instruction to the discharging module so that the discharging module starts discharging according to the discharging instruction and starts a counter to start counting; acquiring a discharge stopping signal, and sending a stopping instruction to the discharge module according to the discharge stopping signal so as to stop the discharge of the discharge module and stop the counting of the counter; the discharge stopping signal is generated by the voltage monitoring module when the analog voltage value is consistent with the voltage value of the energy storage capacitor; the voltage value of the energy storage capacitor is obtained by the voltage monitoring module through the sampling module; and acquiring a counting result of the counter, and determining the discharging time for the voltage value of the energy storage capacitor to be reduced to the target final value voltage value according to the counting result.
In the embodiment of the present invention, the target final voltage value is a digital signal, the digital-to-analog conversion module may be a digital-to-analog converter, and the digital-to-analog converter converts the target final voltage value of the digital signal into an analog signal after receiving the target final voltage value. The logic control module sends a discharging instruction to the discharging module, the discharging instruction is used for enabling the discharging module to start discharging, and the counter is started to start counting at the same time of starting discharging. The voltage monitoring module can acquire a target end voltage value of an analog signal generated by the digital-to-analog converter, and can also acquire a real-time voltage value of the energy storage capacitor through the sampling module, the voltage monitoring module automatically compares the analog voltage value with the voltage value of the energy storage capacitor acquired through the sampling module, and when the voltage value of the energy storage capacitor acquired through the sampling module is equal to the analog voltage value, the voltage monitoring module generates a discharge stopping signal and sends the discharge stopping signal to the logic control module. The voltage monitoring module may be implemented using a comparator. The logic control module acquires the discharge stopping signal, sends a stopping instruction to the discharge module according to the discharge stopping signal, and the stopping instruction is used for controlling the discharge module to stop discharging and stopping counting of the counter. And acquiring a counting result of the counter, wherein the counting result comprises counting frequency data and counting interval duration data, counting data of the voltage value of the energy storage capacitor which is reduced from the target initial voltage value to the target final voltage value can be counted according to the counting result, and then converting the counting data into duration data to obtain the discharge duration.
In order to facilitate accurate calculation of the resistance value of the bridge wire resistor, the discharge resistor comprises a first resistor and a second resistor; the first resistor is connected with the bridge wire resistor in series, and the second resistor is connected with the first resistor and the bridge wire resistor which are connected in series in parallel; calculating the resistance value of the bridge wire resistor according to the resistance value of the discharge resistor, the discharge time, the target initial voltage value and the target final voltage value can be executed according to the following steps:
the resistance value of the bridge wire resistance is calculated according to the following formula: r ═ t/[ c × ln (E/Vt)]，Rqs＝R-R0Wherein t is the discharge duration, c is the capacitance value of the energy storage capacitor, E is the target initial voltage value of the energy storage capacitor, Vt is the target final voltage value of the energy storage capacitor, Rqs is the resistance value of the bridge wire resistor, R is the resistance value of the discharge module, R is the discharge duration, C is the capacitance value of the energy storage capacitor, E is the target initial voltage value of the energy storage capacitor, Vt is the target final voltage value of the0Is the resistance value of the first resistor.
In the embodiment of the present invention, according to the formula R ═ t/[ c × ln (E/Vt)]The resistance value of the discharge module can be calculated by using the target initial voltage value of the energy storage capacitor, the target final voltage value of the energy storage capacitor and the discharge duration, the discharge module is composed of a first resistor, a second resistor and a bridge wire resistor, and according to the connection relation of the first resistor, the second resistor and the bridge wire resistor and the resistance value of the discharge resistor, the formula Rqs R-R can be used0And calculating to obtain the resistance value of the bridge wire resistor.
It should be noted that, in the embodiment of the present invention, the value range of the second resistor may be between 50K and 500K ohms, and the value range of the first resistor may be between 100 and 1000 ohms.
Referring to a circuit diagram of the method for detecting bridge wire resistance of the electronic detonator shown in fig. 3, the method for detecting bridge wire resistance of the electronic detonator provided by the embodiment of the invention is explained by a specific embodiment.
The working process comprises the following steps:
1) the detection device U1 sends a detection instruction for detecting a detonator bridge wire resistor Rqs;
2) the communication module U2 analyzes the detection instruction and transmits the detection instruction to the logic control unit U5, the logic control unit U5 reads and confirms that the detection instruction is the bridgewire resistor Rqs detection instruction, then the charging switch K1 is turned on to charge the energy storage capacitor C1 with the voltage V0 of 2-4V, and the charging switch K1 is turned off after charging is completed;
3) the logic control unit U5 outputs digital signals representing the discharging final value voltage of the energy storage capacitor C1 at pins 2-Pin 6, and the digital-to-analog converter U3 converts the digital signals output by the logic control unit U5 into corresponding analog voltage and uses the analog voltage as the comparison reference voltage Vref of the comparator U4;
4) the logic control unit U5 opens the switch tube Q4 to make the capacitor start discharging through the resistors R9 and R10 and QS1, and simultaneously opens the counter to start counting;
5) the resistor network formed by the R7 and the R8 samples the current voltage Vc of the energy storage capacitor C1, when the voltage Vc is larger than the comparison reference voltage Vref, the output of the comparator U4 keeps a high level unchanged, and when the Vc is reduced to be equal to the Vref, the comparator U4 overturns to output a low level;
6) when the logic control unit U5 detects the moment that the level of Pin7 changes from high to low, the timing of the counter is stopped, Q4 is closed at the same time, the count value is converted into corresponding time T1 according to the clock, and the value of the bridge wire resistor Rqs is calculated according to a capacitance discharge formula;
7) the logic control unit U5 sends the calculated bridge wire resistance value Rqs to the detection equipment U1 through the communication module U2;
8) and after the detection equipment U1 receives the bridge wire resistance value Rqs, judging whether the resistance value is in the range of 0-2 ohms, if so, determining that the bridge wire resistance is qualified, and if not, determining that the detonator can enter the next detection, otherwise, determining that the detonator is unqualified and removing the detonator to scrap.
When an operator of the detection equipment presses a bridge wire resistance detection command, the detection equipment U1 sends a bridge wire resistance detection command to the electronic detonator through a bus, a communication module U2 of the electronic detonator receives and analyzes the sent command and transmits the command to the logic control unit U5, the logic control unit U5 receives the bridge wire resistance detection command, then opens the charging switch K1 to charge the energy storage capacitor C1 with 2-4V voltage V0, closes the charging switch K1 after the charging is finished, then outputs digital signals representing the discharging final value voltage of the energy storage capacitor C1 at the pins 2-Pin 6, the digital-analog converter U3 converts the digital signals into corresponding analog voltages which are used as a comparison reference voltage Vref of the comparator U4, then opens the switch tube Q4 to enable the capacitors to start discharging through the resistors R9 and R10 and QS1, simultaneously opens the counter to start counting, the voltage Vc1 of the energy storage capacitor C1 starts to fall, and Vc also synchronously falls, when Vc is larger than the comparison reference voltage Vref, the output of the comparator U4 keeps high level unchanged, when Vc1 drops to a certain value, Vc is equal to the comparison reference voltage Vref, the comparator U4 inverts to output low level, the logic control unit U5 detects the moment that the level of Pin7 changes from high to low, stops the timing of the counter and closes Q4, and converts the count value into corresponding time T1 in time clock, and the digital logic control unit U5 calculates the value of the bridge wire resistor Rqs according to the following method:
the voltage across the capacitor at any time when the capacitor is discharged is:
vt ═ E × E [ -t/RC ] (1), the reverse can be found:
R＝t/[c×ln(E/Vt)] (2)
wherein T is a discharge time T1, C is a discharge capacitor, which is a capacitance value of 100-220 uF of the energy storage capacitor C1 (specifically determined according to the detonator), 100uF is taken for calculation convenience, E is an initial voltage before discharge, which is V0, and Vt is a discharge final value voltage, which is Vref.
The capacitance value of the energy storage capacitor, the initial voltage V0, the discharge time T1 and the discharge final value voltage Vref are substituted into the formula (2) to calculate a discharge resistor R, the discharge resistor is a value formed by connecting R10 in series with the bridge wire resistor Rqs and then connecting R9 in parallel, wherein the value of R9 is 50K-500K ohm, and the value of R10 is 100-1000 ohm, and the value of R9 is far greater than the sum of R10 and the bridge wire resistor Rqs, so that the value of R9 can be ignored, the discharge resistor R is approximately equal to the sum of R10 and the bridge wire resistor Rqs, namely R Rqs + R10, and Rqs is R-R10.
After the calculation is finished, the logic control unit U5 sends the bridge wire resistance value Rqs to the detection equipment U1 through the communication module U2, because the bridge wire resistance value is generally 1-2 ohms, the detection equipment judges the value of Rqs, if the bridge wire resistance value is larger than 0 ohm and smaller than 2 ohms, the qualified bridge wire detonator can enter the next detection, otherwise, the bridge wire is unqualified, and the detonator is discarded.
The invention provides a bridge wire resistance detection method and device for an electronic detonator, an electronic detonator and a system, wherein the bridge wire resistance is measured by adopting the discharge characteristic of a capacitor, firstly, an energy storage capacitor is charged, then, the bridge wire is discharged, the time of the discharge process is measured, and then, the bridge wire resistance is reversely deduced, wherein, the discharge final value voltage is set through a logic control unit and a digital-analog converter, the judgment of the discharge end is carried out through a comparator, a resistor is connected with the bridge wire in series and then connected with the other resistor in parallel to form a discharge network, and then, a switching tube is connected in series and matched with a logic control unit to carry out the opening and closing of the discharge.
The embodiment of the invention also provides a bridge wire resistance detection device of an electronic detonator, which is shown in the structural block diagram of the bridge wire resistance detection device of the electronic detonator shown in figure 4, and comprises the following components:
an obtaining module 71, configured to obtain a detection instruction; the detection instruction comprises a target initial voltage value and a target final voltage value of the energy storage capacitor; the boosting module 72 is configured to charge the energy storage capacitor according to the detection instruction, so that the voltage value of the energy storage capacitor is boosted to a target initial voltage value; the voltage reduction module 73 is used for controlling the discharge module to discharge the energy storage capacitor according to the detection instruction so as to reduce the voltage value of the energy storage capacitor to the target final value voltage value, and recording the discharge time length for reducing the voltage value of the energy storage capacitor to the target final value voltage value; the discharge module comprises a bridge wire resistor and a discharge resistor; a calculating module 74, configured to calculate a resistance value of the bridge wire resistor according to the resistance value of the discharge resistor, the discharge duration, the target initial voltage value, and the target final voltage value; the sending module 75 is configured to send the resistance value of the bridge wire resistor to the detection device, so that the detection device generates a detection result according to the resistance value of the bridge wire resistor.
In one embodiment, the voltage reduction module is specifically configured to: sending the target final value voltage value to a digital-to-analog conversion module so that the digital-to-analog conversion module generates an analog voltage value according to the target final value voltage value; sending a discharging instruction to the discharging module so that the discharging module starts discharging according to the discharging instruction and starts a counter to start counting; acquiring a discharge stopping signal, and sending a stopping instruction to the discharge module according to the discharge stopping signal so as to stop the discharge of the discharge module and stop the counting of the counter; the discharge stopping signal is generated by the voltage monitoring module when the analog voltage value is consistent with the voltage value of the energy storage capacitor; the voltage value of the energy storage capacitor is obtained by the voltage monitoring module through the sampling module; and acquiring a counting result of the counter, and determining the discharging time for the voltage value of the energy storage capacitor to be reduced to the target final value voltage value according to the counting result.
In one embodiment, the calculation module is specifically configured to: the resistance value of the bridge wire resistance is calculated according to the following formula: r ═ t/[ c × ln (E/Vt)]，Rqs＝R-R0Wherein t is the discharge duration, c is the capacitance value of the energy storage capacitor, E is the target initial voltage value of the energy storage capacitor, Vt is the target final voltage value of the energy storage capacitor, Rqs is the resistance value of the bridge wire resistor, R is the resistance value of the discharge module, R is the discharge duration, C is the capacitance value of the energy storage capacitor, E is the target initial voltage value of the energy storage capacitor, Vt is the target final voltage value of the0Is the resistance value of the first resistor.
The embodiment of the invention also provides an electronic detonator which comprises the electronic detonator bridge wire resistance detection device.
The embodiment of the invention also provides an electronic detonator system which comprises the electronic detonator.
The embodiment of the present invention further provides a computer device, referring to the schematic block diagram of the structure of the computer device shown in fig. 5, the computer device includes a memory 81 and a processor 82, the memory stores a computer program that can be executed on the processor, and the processor implements the steps of any one of the methods when executing the computer program.
It is clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working process of the computer device described above may refer to the corresponding process in the foregoing method embodiments, and no further description is provided herein
Embodiments of the present invention also provide a computer readable medium having non-volatile program code executable by a processor, the program code causing the processor to perform any of the steps of the above-described method.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A bridge wire resistance detection method for an electronic detonator is characterized by being applied to the electronic detonator, and comprises the following steps:
acquiring a detection instruction; the detection instruction comprises a target initial voltage value and a target final voltage value of the energy storage capacitor;
charging the energy storage capacitor according to the detection instruction so as to enable the voltage value of the energy storage capacitor to rise to the target initial voltage value;
controlling a discharging module to discharge the energy storage capacitor according to the detection instruction so as to enable the voltage value of the energy storage capacitor to be reduced to the target final value voltage value, and recording the discharging time length for the voltage value of the energy storage capacitor to be reduced to the target final value voltage value; the discharge module comprises the bridge wire resistor and a discharge resistor;
calculating the resistance value of the bridge wire resistor according to the resistance value of the discharge resistor, the discharge time length, the target initial voltage value and the target final voltage value;
and sending the resistance value of the bridge wire resistor to detection equipment so that the detection equipment generates a detection result according to the resistance value of the bridge wire resistor.
2. The method according to claim 1, wherein the electronic detonator comprises a communication module, a logic control module, a digital-to-analog conversion module, a voltage monitoring module, a sampling module, an energy storage capacitor, a current limiting module and a discharging module;
the logic control module is respectively and electrically connected with the communication module, the digital-to-analog conversion module, the voltage monitoring module and the discharging module; the voltage monitoring module is electrically connected with the energy storage capacitor through the sampling module; the energy storage capacitor is electrically connected with the current limiting module and the discharging module respectively.
3. The method of claim 2, wherein controlling a discharging module to discharge the energy storage capacitor to reduce the voltage value of the energy storage capacitor to the target final voltage value, and recording a discharging time period for the voltage value of the energy storage capacitor to be reduced to the target final voltage value comprises:
sending the target final value voltage value to a digital-to-analog conversion module so that the digital-to-analog conversion module generates an analog voltage value according to the target final value voltage value;
sending a discharging instruction to the discharging module so that the discharging module starts discharging according to the discharging instruction and starts a counter to start counting;
acquiring a discharge stopping signal, and sending a stopping instruction to the discharge module according to the discharge stopping signal so as to stop the discharge of the discharge module and stop the counting of the counter; the discharge stopping signal is generated by the voltage monitoring module when the analog voltage value is consistent with the voltage value of the energy storage capacitor; the voltage value of the energy storage capacitor is obtained by the voltage monitoring module through the sampling module;
and acquiring a counting result of the counter, and determining the discharge time for the voltage value of the energy storage capacitor to be reduced to the target final value voltage value according to the counting result.
4. The method of claim 2, wherein the discharge resistance comprises a first resistance and a second resistance; the first resistor and the bridgewire resistor are connected in series, and the second resistor is connected in parallel with the first resistor and the bridgewire resistor which are connected in series;
calculating the resistance value of the bridge wire resistor according to the resistance value of the discharge resistor, the discharge time length, the target initial voltage value and the target final voltage value, wherein the calculation comprises the following steps:
calculating the resistance value of the bridge wire resistor according to the following formula:
R＝t/[c×ln(E/Vt)]
Rqs＝R-R0
wherein t is the discharge duration, c is the capacitance value of the energy storage capacitor, E is the target initial voltage value of the energy storage capacitor, Vt is the target final voltage value of the energy storage capacitor, Rqs is the resistance value of the bridge wire resistor, R is the resistance value of the discharge module, R is the voltage value of the discharge module0Is the resistance value of the first resistor.
5. The utility model provides an electronic detonator bridging filament resistance detection device which characterized in that is applied to electronic detonator, includes:
the acquisition module is used for acquiring a detection instruction; the detection instruction comprises a target initial voltage value and a target final voltage value of the energy storage capacitor;
the boosting module is used for charging the energy storage capacitor according to the detection instruction so as to enable the voltage value of the energy storage capacitor to be boosted to the target initial voltage value;
the voltage reduction module is used for controlling the discharge module to discharge the energy storage capacitor according to the detection instruction so as to reduce the voltage value of the energy storage capacitor to the target final value voltage value, and recording the discharge time for reducing the voltage value of the energy storage capacitor to the target final value voltage value; the discharge module comprises the bridge wire resistor and a discharge resistor;
the calculation module is used for calculating the resistance value of the bridge wire resistor according to the resistance value of the discharge resistor, the discharge time, the target initial voltage value and the target final voltage value;
and the sending module is used for sending the resistance value of the bridgewire resistor to detection equipment so that the detection equipment generates a detection result according to the resistance value of the bridgewire resistor.
6. The apparatus of claim 5, wherein the voltage reduction module is specifically configured to:
sending the target final value voltage value to a digital-to-analog conversion module so that the digital-to-analog conversion module generates an analog voltage value according to the target final value voltage value;
sending a discharging instruction to the discharging module so that the discharging module starts discharging according to the discharging instruction and starts a counter to start counting;
acquiring a discharge stopping signal, and sending a stopping instruction to the discharge module according to the discharge stopping signal so as to stop the discharge of the discharge module and stop the counting of the counter; the discharge stopping signal is generated by the voltage monitoring module when the analog voltage value is consistent with the voltage value of the energy storage capacitor; the voltage value of the energy storage capacitor is obtained by the voltage monitoring module through the sampling module;
and acquiring a counting result of the counter, and determining the discharge time for the voltage value of the energy storage capacitor to be reduced to the target final value voltage value according to the counting result.
7. An electronic detonator comprising the electronic detonator bridge wire resistance detecting device according to claim 5 or 6.
8. An electronic detonator system characterized by comprising the electronic detonator of claim 7.
9. Computer device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method according to any of the claims 1 to 4 when executing the computer program.
10. A computer-readable medium having non-volatile program code executable by a processor, the program code causing the processor to perform the method of any of claims 1 to 4.
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