Ignition current detection device for electric initiating explosive device

Abstract

The utility model belongs to the technical field of electric initiating explosive device detection, and discloses an electric initiating explosive device ignition current detection device, which comprises a direct-current stabilized power supply, two switches, two resistors, a high-speed data acquisition unit, an aviation plug, a computer and an ampere meter, the direct-current stabilized power supply is connected with a circuit through a power supply wire and an aviation plug; the switch K1, the switch K2, the resistor R1, the resistor R2, the ampere meter, the electric initiating explosive device and the direct-current stabilized power supply form a series loop; the ampere meter and the electric initiating explosive device are respectively connected with the circuit through a power supply wire and an aviation plug; the high-speed data collector is connected in parallel with the resistor R1 through a power supply wire and an aviation plug; the high-speed data collector is connected with the computer through a USB communication cable. According to the utility model, the measurement of the misfire verification test and the reliable ignition current detection test of the electric initiating explosive device can be realized.

Description

Technical Field

[0001] This utility model belongs to the field of electric flammable device testing technology, and in particular relates to a device for detecting the ignition current of electric flammable devices. Background Technology

[0002] For the testing and verification of pyrotechnics, GIB 5309-2004, Test Methods for Pyrotechnics, provides relatively detailed regulations. It specifies the instruments, equipment, and apparatus for relevant verification tests of pyrotechnics, the test procedures, result evaluation, and precautions. Its purpose is to verify whether pyrotechnics ignite and whether their performance is not degraded when subjected to specified stimuli. However, in certain specific tests, the testing instruments and equipment are often required to have three capabilities: 1. In non-ignition verification, the ability to detect the specified non-ignition current test value; 2. In reliable ignition verification, the ability to acquire instantaneous ignition current values ​​and pulse widths at high speed; 3. The ability to process and analyze the acquired data. How to meet these requirements has become an urgent problem to be solved. Utility Model Content

[0003] The technical problem to be solved by this utility model is: how to realize the non-ignition verification test and reliable ignition current detection test of electric sparking devices, and to complete the high-speed measurement, storage and analysis of non-ignition current verification and reliable ignition current and pulse width.

[0004] To solve the above-mentioned technical problems, the specific technical solution of this utility model is as follows:

[0005] A device for detecting the ignition current of an electric pyrotechnic device includes a DC regulated power supply, two switches, two resistors, a high-speed data acquisition unit, an aviation connector, a computer, and an ammeter. The DC regulated power supply is connected to the circuit via a power supply wire and the aviation connector. Switches K1 and K2, resistors R1 and R2, the ammeter, the electric pyrotechnic device, and the DC regulated power supply form a series circuit. The ammeter and the electric pyrotechnic device are connected to the circuit via power supply wires and the aviation connector, respectively. The high-speed data acquisition unit is connected in parallel with resistor R1 via a power supply wire and the aviation connector. The high-speed data acquisition unit is connected to the computer via a USB communication cable.

[0006] Furthermore, the ignition current detection device for the electric pyrotechnics is provided with an outer casing.

[0007] Among them, the DC regulated power supply is used to provide ignition voltage and current for reliable operation of electro-explosives, and the voltage is continuously adjustable.

[0008] Among them, switch K1 is used to control the connection and disconnection of the DC regulated power supply and the circuit; switch K2 is used to control whether the ammeter is connected in series with the circuit, and has three states: "ammeter connected in series", "circuit connected", and "circuit disconnected".

[0009] Among them, resistor R1 is a high-power resistor with a fixed resistance value, which can withstand a large current and is used to generate instantaneous voltage when ignited, so that the high-speed data acquisition unit can collect the instantaneous voltage.

[0010] Among them, resistor R2 is a voltage divider resistor.

[0011] The high-speed data acquisition unit is used to acquire instantaneous voltage and its pulse width. The instantaneous ignition current value is obtained by dividing the acquired voltage value by the resistance value of resistor R1.

[0012] This utility model has the following advantages:

[0013] 1. It can perform non-ignition verification tests and reliable ignition current detection tests on electro-explosive products;

[0014] 2. It solves the problem of high-speed acquisition and data analysis of instantaneous ignition current of electric ignition devices, and has the advantages of high sampling frequency, strong data processing and analysis capabilities, and high degree of intelligence. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the hardware connection of this utility model;

[0016] Figure 2 This is a flowchart of the experimental process for this utility model;

[0017] Figure 3 Setting the test parameters for this utility model;

[0018] Figure 4 This is a reliable ignition current curve for this utility model;

[0019] Among them, 1-DC regulated power supply, 2-aviation plug, 3-high-speed data acquisition unit, 4-ammeter, 5-computer, 6-device housing, 7-safety protection device, 8-electric fire-resistant device, K1-measuring switch, K2-changeover switch, R1-measuring resistor, R2-voltage divider resistor. Detailed Implementation

[0020] This invention tests the ignition current of an electro-explosive device by connecting a DC regulated power supply, an ammeter, and a power resistor in series in the circuit. It enables verification of non-ignition and reliable ignition detection of the electro-explosive device, employing high-speed acquisition technology to test the ignition current and pulse width.

[0021] The present invention will now be explained and described in detail with reference to the accompanying drawings and Embodiment 1.

[0022] The hardware components of this utility model are as follows: Figure 1 As shown, it includes a DC regulated power supply, switch, resistor, high-speed data acquisition unit, aviation connector, computer, device housing, ammeter, and safety protection devices; the software part is a dedicated test program.

[0023] The DC regulated power supply is connected to the circuit via a power supply wire and an aviation plug; switch K1, switch K2, resistor R1, resistor R2, ammeter, and electric arc device form a series circuit with the DC regulated power supply; the ammeter and electric arc device are connected to the circuit via power supply wires and aviation plugs respectively; the high-speed data acquisition unit is connected in parallel with power resistor R1 via a power supply wire and aviation plug; the high-speed data acquisition unit is connected to the computer via a USB communication cable.

[0024] A DC regulated power supply provides ignition voltage and current for reliable operation of the pyrotechnic device, with continuously adjustable voltage. Switch K1 controls the connection and disconnection of the DC regulated power supply and the circuit. Switch K2 controls whether the ammeter is connected in series with the circuit, with three states: "ammeter connected," "circuit on," and "circuit off." Power resistor R1 is a high-power resistor with a fixed resistance value, capable of withstanding large currents, used to generate instantaneous voltage during ignition for high-speed data acquisition. Power resistor R2 shares part of the voltage drop, acting as a voltage divider. The ammeter monitors changes in circuit current. The high-speed data acquisition device acquires the instantaneous voltage and its pulse width; the instantaneous ignition current value is obtained by dividing the acquired voltage value by the resistance of power resistor R1. An aviation connector ensures reliable connection between hardware components. The device housing protects and insulates the components. Safety protection devices prevent damage to the surrounding environment caused by the high temperature or fragments generated after the pyrotechnic device ignites.

[0025] The dedicated test program uses the Microsoft Visual Studio development platform and can perform signal sampling, range selection, data storage, and data reading at different frequencies; draw and analyze test data curves; truncate, stretch, restore, and denoise test data curves; calculate test data and display the average value, maximum value, and duration of the test data; and export test data and graphs.

[0026] The implementation process of the dedicated test program is as follows:

[0027] According to the hardware protocol requirements, preset hardware parameters and create device objects;

[0028] Verify the working parameters, initialize the sampling task, start the sampling task, then send the software trigger event and read the data in a loop;

[0029] The test data is converted into current values ​​and temporarily stored in the form of a data array;

[0030] After stopping data collection, save the test data to a text document;

[0031] Use the test data saved in the text document to plot the ignition current variation curve with time on the horizontal axis and current value on the vertical axis.

[0032] The ignition current variation curve is truncated, stretched, restored, denoised, and calculated to achieve analysis and processing of test data;

[0033] Export the test data and graphs.

[0034] The working steps of an ignition current detection device for electric pyrotechnics are as follows:

[0035] Step 1: Preparation for ignition current detection of electric ignition devices

[0036] 1.1 Perform internal resistance testing on the electric detonator using a dedicated electric detonator tester;

[0037] 1.2 After confirming that the internal resistance of the electric pyrotechnic device meets the test requirements, record the resistance value and short-circuit it;

[0038] 1.3 Conduct non-ignition verification tests and reliable ignition current detection tests in accordance with the test requirements;

[0039] 1.4 With switches K1 and K2 in the open state, connect the DC regulated power supply, high-speed data acquisition device, ammeter, and electric spark plug to the circuit respectively, and place the electric spark plug inside the safety protection device.

[0040] Step 2: Non-ignition verification test

[0041] 2.1 The non-ignition current test value and duration shall be clearly specified in accordance with the test requirements. Generally, it is required that no sparks will occur within 5 minutes at 200mA. If there are any differences, the specific test requirements shall apply.

[0042] 2.2 Turn on the DC regulated power supply, preheat it, and switch switch K2 to the "ammeter in series" state;

[0043] 2.3 Close switch K1, the circuit is connected, adjust the DC regulated power supply to increase the voltage until the current reaches the non-ignition current (e.g., 200mA), and maintain non-ignition for a duration (e.g., 5min).

[0044] 2.4 Start the dedicated test program to continuously acquire the loop current signal and monitor the current change.

[0045] Step 3 Reliable ignition current detection test

[0046] 3.1 Determine the reliable ignition current according to the test requirements. Generally, a reliable ignition current of 1A is required, but the specific requirements shall be followed according to the specific test requirements.

[0047] 3.2 Calculate the required output voltage of the DC regulated power supply based on the circuit resistance and ignition current;

[0048] 3.3 Switch switch K2 to the "loop on" state and adjust the DC regulated power supply to the pre-calculated voltage value;

[0049] 3.4 Start the dedicated test program, set the high-speed sampling rate, and collect the instantaneous reliable ignition current and pulse width of the circuit;

[0050] 3.5 Close switch K1, the circuit is connected, and the electric pyrotechnic device is detonated.

[0051] Example 1

[0052] The experiment involved non-ignition verification tests and reliable ignition verification tests on three electro-explosive devices, following the test procedure and flowchart. Figure 2 First, preparatory work is carried out to determine the technical parameters of the experimental instruments and equipment. See Table 3.

[0053] Table 3 Technical parameters of test instruments and equipment

[0054]

[0055] Table 4 Technical Parameters of Electric Detonator Tester

[0056]

[0057] 1. Non-ignition verification test

[0058] Using 200mA and 5min as the specified non-ignition current test values, connect the circuit, set the DC regulated power supply voltage, turn on the switch, start timing, monitor the circuit current with the ammeter, and turn off the switch to stop the test when 5min has elapsed.

[0059] Test results: At 200mA for 5 minutes, none of the three electric sparking devices ignited.

[0060] 2. Reliable ignition verification test

[0061] Reliable ignition verification tests were conducted on three electric ignition devices using two ignition currents: 1A and 500mA. The resistance of the three devices was measured using an electric detonator tester, and the resistance values ​​were 1.377Ω, 1.385Ω, and 1.445Ω, respectively. After the circuit switch was opened, the electric ignition device was connected to the circuit, the circuit resistance was measured, the power supply voltage was calculated, parameters were set, the power supply voltage was adjusted, data acquisition began, and the switch was turned on; the electric ignition device ignited instantaneously.

[0062] The collected ignition current data were saved, and data processing and analysis were performed, as shown in Table 5.

[0063] Table 5 Test data for electric pyrotechnics

[0064] Electrical Explosives Number 1# 2# 3# Resistance of electrical and thermal products 1.377Ω 1.385Ω 1.445Ω Specified ignition current 1A 500mA 500mA Sampling time interval 80μs 80μs 80μs Instantaneous ignition average current 1.004A 499mA 499mA Maximum instantaneous ignition current 1.115A 533mA 517mA Pulse width 5ms 251ms 190ms

[0065] Under high current, the pulse width becomes very short; that is, the higher the specified ignition current, the shorter the duration. For reliable ignition current curves, see... Figure 4 .

[0066] Result evaluation: If the electric sparking device ignites within the specified time, it is considered unqualified; if it does not ignite within the specified time, but can still reliably ignite after the non-ignition test, it is considered qualified.

[0067] The above tests verify that all the electric pyrotechnic devices used in the tests meet the test requirements and are qualified.

[0068] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and improvements without departing from the principles of the present invention, and these modifications and improvements should also be considered to fall within the protection scope of the present invention.

Claims

1. A device for detecting the ignition current of an electro-explosive product, characterized in that, The system includes a DC regulated power supply, two switches, two resistors, a high-speed data acquisition unit, an aviation connector, a computer, and an ammeter. The DC regulated power supply is connected to the circuit via a power supply cable and the aviation connector. Switches K1 and K2, resistors R1 and R2, the ammeter, and the ignition device form a series circuit with the DC regulated power supply. The ammeter and the ignition device are connected to the circuit via power supply cables and the aviation connector, respectively. The high-speed data acquisition unit is connected in parallel with resistor R1 via a power supply cable and the aviation connector. The high-speed data acquisition unit is connected to the computer via a USB communication cable.

2. The ignition current detection device for electro-explosives according to claim 1, characterized in that, The ignition current detection device for electric flammable products is externally equipped with a housing.

3. The ignition current detection device for electro-explosive products according to claim 1, characterized in that, A DC regulated power supply is used to provide ignition voltage and current for reliable operation of electro-explosive devices, and the voltage is continuously adjustable.

4. The ignition current detection device for electro-explosive products according to claim 1, characterized in that, Switch K1 is used to control the connection and disconnection of the DC regulated power supply and the circuit; switch K2 is used to control whether the ammeter is connected in series with the circuit, and has three states: "ammeter connected in series", "circuit connected", and "circuit disconnected".

5. The ignition current detection device for electro-explosive products according to claim 1, characterized in that, Resistor R1 is a high-power resistor with a fixed resistance value, used to generate instantaneous voltage during ignition so that the high-speed data acquisition unit can collect the instantaneous voltage.

6. The ignition current detection device for electro-explosive products according to claim 5, characterized in that, Resistor R2 is a voltage divider resistor.

7. The ignition current detection device for electro-explosive products according to claim 1, characterized in that, The high-speed data acquisition unit is used to acquire instantaneous voltage and its pulse width. The instantaneous ignition current value is obtained by dividing the acquired voltage value by the resistance value of resistor R1.

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