CN-117629002-B - Ignition temperature determining method for glow-wire type electric initiating explosive device based on current sensitivity test

CN117629002BCN 117629002 BCN117629002 BCN 117629002BCN-117629002-B

Abstract

The invention discloses a method for determining ignition temperature of a glowing bridge wire type electric initiating explosive device based on current sensitivity test, which comprises the steps of respectively carrying out current ignition sensitivity test on the glowing bridge wire type electric initiating explosive device to be tested at different temperatures according to a lifting method, and then determining 50% ignition current of the tested hot bridge wire type electric initiating explosive device at different temperatures, and finally determining the critical ignition temperature of the tested hot bridge wire type electric initiating explosive device. According to the invention, the current sensitivity test is carried out on the tested burning bridge wire type electric initiating explosive device under different environmental temperatures, 50% of the ignition current is accurately measured, the ignition temperature of the packaged electric initiating explosive device under a stable and constant condition can be determined, and a basic data support is provided for testing and evaluating the electromagnetic radiation safety of the tested ammunition by using the optical fiber temperature measurement method.

Inventors

WEI GUANGHUI
PAN XIAODONG
WAN HAOJIANG
LU XINFU
SUN YONGWEI

Assignees

中国人民解放军陆军工程大学

Dates

Publication Date: 20260512
Application Date: 20231204

Claims (9)

1. The ignition temperature determining method for the glow-wire type electric initiating explosive device based on the current sensitivity test is characterized by comprising the following steps of: Step1, respectively carrying out current ignition sensitivity test on a tested glow bridge wire type electric initiating explosive device at different temperatures according to a lifting method; Step 2, determining 50% ignition current of the tested hot bridge wire type electric initiating explosive device at different temperatures according to the test result of the step 1; step 3, determining the critical ignition temperature of the tested hot bridge wire type electric initiating explosive device according to the results of the step 1 and the step 2: the critical firing temperature of the hot bridgewire electrical initiating explosive device under test is determined based on two different ambient temperatures and the 50% firing current of the electrical initiating explosive device under test determined at the ambient temperatures: Wherein T ig represents the critical firing temperature of the test hot wire bridge type electric initiating explosive device, and I 50-1 、I 50-2 represents the 50% firing current of the test electric initiating explosive device confirmed at two different ambient temperatures T 11 、T 21 , respectively.
2. The method for determining the ignition temperature of a hot bridge wire type electric initiating explosive device based on the current sensitivity test as set forth in claim 1, wherein the current ignition sensitivity test in the step 1 is as follows: And under different environment temperatures, carrying out current excitation on M tested hot bridge wire type electric initiating explosive devices based on an adjustable constant current source, and adjusting excitation current step by step according to a set adjusting step length I st until 50% of tested hot bridge wire type electric initiating explosive devices are ignited.
3. The method for determining the ignition temperature of a hot wire bridge type electric initiating explosive device based on a current sensitivity test as set forth in claim 2, wherein the adjusting step size I st is set as follows according to the ignition current I ig and the safety current I sa of the hot wire bridge type electric initiating explosive device to be tested: I st ＝(I ig -I sa )/20。
4. The method for determining the firing temperature of a hot bridge wire type electric initiating explosive device based on a current sensitivity test according to claim 2, wherein when the current firing sensitivity test is performed, one of M tested hot bridge wire type electric initiating explosive devices is firstly taken out for testing, the initial excitation current is the safe current I sa of the tested hot bridge wire type electric initiating explosive device, the excitation current is increased by 1 adjustment step length I st each time until the power initiating explosive device fires, and the excitation current before the last adjustment of the power initiating explosive device in firing is set as the initial excitation current of the next power initiating explosive device; At this time, the next power generation initiating explosive device takes the maximum test non-ignition current of the power generation initiating explosive device as an initial excitation current value, takes I st as an adjustment step length, performs the test according to a lifting method test program, and replaces one power generation initiating explosive device each time, if the former power generation initiating explosive device fires, the excitation current of the latter power generation initiating explosive device is reduced by one step length I st , otherwise, 1 step length I st is increased until the test of M power generation initiating explosive devices in the group is completed.
5. The method for determining the ignition temperature of a hot bridge wire type electric initiating explosive device based on a current sensitivity test as recited in claim 2, wherein the temperature difference between different environment temperatures is more than 50 ℃.
6. The method for determining the ignition temperature of a hot bridgewire type electric initiating explosive device based on the current sensitivity test according to claim 1, wherein the ignition current of 50% of the ignition current of the hot bridgewire type electric initiating explosive device tested in the step 2 is specifically: Based on the number of fires n i1 and the number of misfires n i0 corresponding to each excitation current value, the total effective number of fires Σn i1 and the total effective number of misfires Σn i0 are obtained, and the excitation current is expressed as I i ＝I 0 +iI st If Σn i1 ≤∑n i0 , 50% firing current I 50 of the test electrical initiating explosive device: I 50 ＝I 0 +(Σin i1 /Σn i1 -1/2)I st if Σn i1 ＞∑n i0 , 50% firing current I 50 of the test electrical initiating explosive device: I 50 ＝I 0 +(Σin i0 /Σn i0 +1/2)I st 。
7. The ignition temperature determining system for the glow-wire type electric initiating explosive device based on the current sensitivity test is characterized by comprising the following modules: the current ignition sensitivity testing module is used for respectively testing the current ignition sensitivity of the hot bridge wire type electric initiating explosive device to be tested at different temperatures according to a lifting method; The 50% ignition current determining module is used for determining 50% ignition current of the tested hot bridge wire type electric initiating explosive device at different temperatures; the ignition temperature determining module is used for determining the critical ignition temperature of the tested burning hot bridge wire type electric initiating explosive device; the critical firing temperature of the hot bridgewire electrical initiating explosive device under test is determined based on two different ambient temperatures and the 50% firing current of the electrical initiating explosive device under test determined at the ambient temperatures: Wherein T ig represents the critical firing temperature of the test hot wire bridge type electric initiating explosive device, and I 50-1 、I 50-2 represents the 50% firing current of the test electric initiating explosive device confirmed at two different ambient temperatures T 11 、T 21 , respectively.
8. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any of claims 1-6 when the computer program is executed by the processor.
9. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, carries out the steps of the method according to any one of claims 1-6.

Description

Ignition temperature determining method for glow-wire type electric initiating explosive device based on current sensitivity test Technical Field The invention belongs to the field of electric initiating explosive device testing, and particularly relates to a method for determining ignition temperature of a glowing heat bridge wire type electric initiating explosive device based on a current sensitivity test. Background The electromagnetic energy sensitivity and the weak receiving capability for the practical use of the hot bridge wire type electric initiating explosive device form a contradictory entity, so that the problems of urgent military requirements and great technical difficulty of the electromagnetic radiation safety test and evaluation of the practical electric initiating explosive device are solved, and a more scientific and effective equivalent test method for the electromagnetic radiation effect of a strong field must be explored. Electromagnetic radiation safety evaluation is carried out by monitoring the response of the glow-wire type electric initiating explosive device, the ignition field intensity of the tested electric initiating explosive device is determined by test extrapolation, the method is the only way to solve the contradiction, and the current research work is mainly focused on two aspects of an induced current/voltage test method and an optical fiber temperature measurement method: Along with the increase of electromagnetic wave radiation frequency, the induction current/voltage obtained by the induction current/voltage test method has larger difference from the current/voltage for determining the heating of the bridge wire under the influence of the distribution of induction current standing waves, the difficulty in the test position approaching to the bridge wire to be tested, the frequency characteristic of the probe to be measured and the electromagnetic induction of the probe connecting wire, and particularly the induction signal of the probe connecting wire influences the test value of the induction current/voltage, even the test evaluation value is lost. Therefore, the upper limit of the applicable frequency of the induced current/voltage test method is not preferably more than 1GHz. The microwave frequency band above 1GHz is easier to excite strong-field electromagnetic radiation, the threat to ammunition systems containing burning heat bridge wire type electric initiating explosive devices is larger, and the technical requirements of safety test and evaluation of the ammunition systems under the strong-field electromagnetic radiation cannot be met by adopting an induced current/voltage test method. Whether the hot bridge wire type electric initiating explosive device can ignite is essentially determined by the temperature of the bridge wire and indirectly determined by the steady state power or transient state energy coupled by the bridge wire from the electromagnetic field. The optical fiber temperature measurement method is characterized in that the bridge wire 'equivalent induction current' or the bridge wire temperature rise under the electromagnetic environment is given out by measuring the bridge wire temperature rise corresponding to the unit radiation field intensity and comparing with the bridge wire temperature rise corresponding to the direct current ignition current, the electromagnetic radiation safety of the electric initiating explosive device can be evaluated based on the ignition temperature of the packaged electric initiating explosive device, and the test method is not limited by the electromagnetic radiation frequency according to the hot spot theory of the explosive ignition, and is particularly suitable for testing and evaluating the electromagnetic radiation safety of the microwave frequency range electric initiating explosive device. However, the bridge wire of the glow wire type electric initiating explosive device is tiny (the radius is about 20 mu m generally), the ignition energy is small (the pulse ignition energy is as small as mJ order), the bridge wire temperature rise of the glow wire type bridge wire type electric initiating explosive device is difficult to measure by a conventional temperature measuring device, and even though the diameter of the international most advanced GaAs band gap temperature measuring sensor is only 0.15mm, the diameter of the bridge wire is still far larger than that of a general glow wire type bridge wire type electric initiating explosive device. In order to make the tested bridge wire and the GaAs band gap temperature measuring sensor reach heat balance as soon as possible, the two must be in close contact to form a bare bridge temperature measuring device, the heat dissipation condition of the tested electric initiating explosive device is inevitably changed, the bridge wire test temperature under the same current excitation is different from the real bridge wire temperature, and calibration must be perfo