CN109916247B - Intelligent security system and method for monitoring initiating explosive device detonation process - Google Patents
Intelligent security system and method for monitoring initiating explosive device detonation process Download PDFInfo
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Abstract
The invention discloses an intelligent security system for monitoring the detonation process of initiating explosive devices, which comprises a master control and analysis unit, an initiating explosive device testing unit, an initiating explosive device detonation and detonation current testing unit and a monitoring unit, wherein the initiating explosive device testing unit, the initiating explosive device detonation and detonation current testing unit and the monitoring unit are respectively connected with the master control and analysis unit. Also disclosed is a method of monitoring the detonation process of an initiating explosive device, comprising measuring the static resistance of the initiating explosive device; A. monitoring the detonation current waveform of the initiating explosive device; B. collecting temperature and pressure signals of a detonation site; collecting and analyzing video signals and audio signals of the site after detonation: and comparing the video signal and the audio signal of the site after the detonation with the video signal and the audio signal of the site before the detonation respectively, and judging whether the site is completely exploded. The method can monitor the detonation current during detonation, collect and analyze video, audio, temperature and pressure information generated in the detonation process, analyze the safety condition of the detonation process site, and perform overall and omnibearing intelligent monitoring on the detonation process.
Description
Technical Field
The invention relates to the technical field of electronic measurement, in particular to an intelligent security system and method for monitoring the detonation process of initiating explosive devices.
Background
The initiating explosive device is a key part for initiating explosive. Because the initiating explosive and the explosive belong to dangerous chemicals, the initiation process flow of the initiating explosive is very strict due to safety considerations and needs remote isolation operation. At present, the detonation process flow of the initiating explosive device is roughly as follows: measuring the resistance value of the initiating explosive device; mounting initiating explosive devices; the operator leaves the site and conducts remote isolated detonation; artificially judging the explosion is finished; and (5) allowing an operator to enter the site for subsequent treatment. Due to the lack of equipment for monitoring the detonation process of initiating explosive devices, the completion of the detonation process needs to be judged manually, and it is safe for operators to enter the site. However, if human judgment is wrong, serious consequences can be caused. Especially, in the case that the initiating explosive device cannot successfully detonate the explosive, it is difficult to artificially judge whether the site is safe.
Disclosure of Invention
The invention aims to provide an intelligent security system and method for monitoring the initiating explosive device detonation process, which are used for solving the problems that in the prior art, equipment for monitoring the initiating explosive device detonation process is lacked, whether the detonation is finished or not is judged manually, and the safety of operators entering the site cannot be guaranteed.
The invention solves the problems through the following technical scheme:
the utility model provides a monitor initiating explosive device detonation process's intelligent security system, includes the initiating explosive device test unit, initiating explosive device detonation and initiation current test unit and the monitoring unit that total accuse and analysis unit, be connected respectively with total accuse analysis unit, wherein:
the initiating explosive device testing unit is used for measuring the static resistance of the initiating explosive device, transmitting the measured static resistance to the master control and analysis unit and switching the initiating explosive device which is qualified in measurement to the initiating explosive device detonation and detonation current testing unit;
the initiating explosive device detonation and detonation current testing unit and the initiating explosive device form a detonation loop, and are used for applying detonation energy under the control of the master control and analysis unit, monitoring the detonation current waveform flowing through the initiating explosive device at the same time, and sending the detonation current waveform to the master control and analysis unit;
the monitoring unit is used for monitoring the site video, the site audio, the temperature and the pressure of the detonation site and transmitting the detection result to the master control and analysis unit;
the master control and analysis unit is used for setting the parameters of the initiating explosive device detonation and detonation current test unit according to the type of the initiating explosive device when the initiating explosive device is judged to be qualified; the device is also used for analyzing and obtaining the characteristic parameter value of the detonation current waveform and judging whether the detonation current waveform is qualified or not; the device is also used for respectively comparing the site video, the site audio, the temperature and the pressure before and after the detonation, and judging whether the detonation is finished and whether the detonation is sufficient; and continuously giving out warning prompts when the initiating explosive device is unqualified, the detonation current waveform is unqualified, the detonation is not finished or the detonation is insufficient.
Before detonation, the initiating explosive device resistance testing unit can measure the static resistance of the initiating explosive device; each type of initiating explosive device has a qualified resistance value range, if the measured resistance value of the resistor is not in the range, the initiating explosive device is considered to have a problem, and the master control and analysis unit can prohibit the initiation and remind an operator to further check. In the process of detonation, the initiating explosive device detonation and detonation current testing unit can monitor the current waveform flowing through the initiating explosive device while applying detonation energy; if each type of initiating explosive device is detonated normally, the detonation current waveforms of the initiating explosive devices are similar, and the main characteristic parameter values (peak value, period and rise time) are all in a qualified range; if the measured main characteristic parameters of the detonation current are not in the qualified range, the master control and analysis unit judges that the detonation process of the initiating explosive device is abnormal and sends out an alarm prompt to remind an operator of paying attention.
In order to monitor the situation at the initiation site after initiation, a monitoring unit is installed already at the initiation site before initiation. The monitoring unit stores the collected video information firstly and then transmits the video information to the master control and analysis unit, the master control and analysis unit displays the site video and captures and analyzes the flash intensity of the site after detonation, and if the flash intensity of the site after detonation is greater than that before detonation, the master control and analysis unit can continuously send out warning prompts to remind an operator of paying attention. The detonation site audio signals collected by the monitoring unit are amplified and signal conditioned and then acquired by the master control and analysis unit, and the master control and analysis unit performs fast Fourier transform on the acquired site audio waveforms to obtain signal characteristics, such as frequency, intensity and the like, of each component in the audio waveforms. If the master control and analysis unit finds that other audio components different from those before the detonation exist on the site after the detonation, the master control and analysis unit can continuously send out warning prompts to remind operators of paying attention. The temperature and pressure signals collected by the monitoring unit are amplified and signal conditioned respectively and then transmitted to the master control and analysis unit, the master control and analysis unit can obtain the pressure and temperature curve of the site after detonation, and the actual explosion TNT equivalent can be calculated according to the pressure and temperature curve and an empirical formula. If the explosion TNT equivalent calculated by actual measurement is less than 20% of the explosion TNT equivalent calculated by theory before detonation, the total control and analysis unit judges that the detonation is insufficient, and the amount of the energetic materials with the TNT equivalent left on site is not reacted, and sends out an alarm prompt to remind an operator of paying attention. When the safety of the site is judged to be yes, the warning prompt is eliminated, and the operator can wear the protective articles and enter the detonation site for subsequent treatment.
Furthermore, the initiating explosive device testing unit comprises a resistance measurement program-controlled constant current source, a signal conditioning and collecting circuit 1 and a relay driving control circuit, wherein the resistance measurement program-controlled constant current source, the signal conditioning and collecting circuit 1 and the relay driving control circuit are connected with a relay, a static contact of the relay is connected with one end of the initiating explosive device, a movable contact of the relay is connected between the resistance measurement program-controlled constant current source and the initiating explosive device detonation and detonation current testing unit in a switching mode, the other end of the initiating explosive device is grounded, and two ends of the initiating explosive device are connected with the signal conditioning and collecting circuit 1. The initiating explosive device detonation and detonation current testing unit comprises a detonation energy program-controlled programmable pulse power source and a signal conditioning and collecting circuit 2, wherein the detonation energy program-controlled programmable pulse power source is connected with a detonation current sampling resistor, the signal conditioning and collecting circuit 2 collects voltage signals at two ends of the detonation current sampling resistor, processes the voltage signals and transmits the voltage signals to the main control and analyzing unit, and when initiating explosive devices are connected to the initiating explosive device detonation and detonation current testing unit, the detonation current sampling resistor is connected with the initiating explosive devices in series.
Before detonation, the master control and analysis unit firstly controls the relay drive control circuit to connect the initiating explosive device into a resistance measurement loop, then controls the program-controlled constant current source to output 5mA constant current test current, the test current flows through the detected initiating explosive device, voltage signals are generated at two ends of the detected initiating explosive device, the voltage signals enter the master control and analysis unit through the signal conditioning and acquisition circuit 1, and the resistance value of the detected initiating explosive device is obtained through calculation according to ohm's law. After the resistance value of the measured initiating explosive device is qualified, the master control and analysis unit controls the relay drive control circuit to connect the initiating explosive device into the detonation circuit, and sets parameters of the program-controlled programmable pulse power source according to the type of the initiating explosive device; after the detonation preparation work is finished, the master control and analysis unit sends a detonation ready indication to an operator, and after the operator triggers a detonation key, the master control and analysis unit controls the program-controlled programmable pulse power source to output detonation energy; before the initiation energy is input into the initiating explosive device, the initiation energy also flows through the initiation current sampling resistor, voltage signals are generated at two ends of the initiation current sampling resistor, the voltage signals enter the master control and analysis unit through the signal conditioning and acquisition circuit 2, and characteristic parameter values of initiation current waveforms can be obtained through digital signal analysis.
Further, the monitoring unit comprises video monitoring, audio monitoring, temperature monitoring and pressure monitoring, wherein:
video monitoring, namely acquiring video information of a detonation site in real time by a micro high-speed camera, storing the video information to a hard disk video recorder, and transmitting the video information to a master control and analysis unit;
the audio monitoring is that a capacitance type high-sensitivity sound transmitter collects audio information of a detonation site, and the audio information is amplified by a preposed voltage amplifier, processed by a signal conditioning and collecting circuit and transmitted to a master control and analysis unit;
temperature monitoring, namely collecting temperature change of a detonation site by a high-frequency thermocouple, amplifying by a preposed voltage amplifier, processing by a signal conditioning and collecting circuit, and transmitting to a master control and analysis unit;
and pressure monitoring, namely collecting pressure change of a detonation site by a high-frequency pressure sensor, amplifying by a pre-charge amplifier, processing by a signal conditioning and collecting circuit, and transmitting to a master control and analysis unit.
In order to monitor the conditions of the detonation site after detonation, a miniature high-speed camera, a capacitive high-sensitivity sound transmitter, a high-frequency thermocouple and a pressure sensor are arranged and installed on the detonation site before detonation, and the video, audio, temperature and pressure change conditions of the detonation site can be comprehensively known through signal acquisition, amplification, conditioning and digital signal analysis. The video information collected by the miniature high-speed camera enters the hard disk video recorder for storage, then is transmitted to the master control and analysis unit, the master control and analysis unit displays the site video and captures and analyzes the flash intensity of the site after detonation, and if the flash intensity of the site after detonation is greater than that before detonation, the master control and analysis unit can continuously send out warning prompts to remind an operator of paying attention. The detonation field audio signals collected by the capacitance type high-sensitivity sound transmitter are acquired by the master control and analysis unit through the pre-voltage amplifier and the signal conditioning and collecting circuit, and the master control and analysis unit performs fast Fourier transform on the acquired field audio waveforms to obtain signal characteristics, such as frequency, intensity and the like, of each component in the audio waveforms. If the master control and analysis unit finds that other audio components different from those before the detonation exist on the site after the detonation, the master control and analysis unit can continuously send out warning prompts to remind operators of paying attention. The high-frequency thermocouple and the pressure sensor are respectively transmitted to the master control and analysis unit through the preposed voltage amplifier and the preposed charge amplifier and then through the signal conditioning and acquisition circuit, the master control and analysis unit can obtain a pressure and temperature curve of a site after detonation, and the actual explosion TNT equivalent can be calculated according to the pressure and temperature curve and an empirical formula. If the explosion TNT equivalent calculated by actual measurement is less than 20% of the explosion TNT equivalent calculated by theory before detonation, the total control and analysis unit judges that the detonation is insufficient, and the amount of the energetic materials with the TNT equivalent left on site is not reacted, and sends out an alarm prompt to remind an operator of paying attention.
A method of monitoring the initiation process of a initiating explosive device, comprising:
step S100: collecting a video signal and an audio signal on site before detonation;
step S200: measuring the static resistance of the initiating explosive device, and initiating the initiating explosive device according to the type of the initiating explosive device when the static resistance of the initiating explosive device is within the qualified resistance range;
step S300: the method comprises the following steps:
A. monitoring the detonation current waveform of the initiating explosive device, performing time domain analysis on the detonation current waveform to obtain the frequency, amplitude and rise time of the detonation current, judging whether the detonation current waveform is qualified, and sending a continuous warning prompt when the detonation current waveform is analyzed and judged to be unqualified;
B. collecting temperature and pressure signals of a detonation site, forming a pressure and temperature curve, calculating the equivalent weight of explosive TNT according to the pressure and temperature curve and an empirical formula, and sending a continuous warning prompt when the equivalent weight of explosive TNT is smaller than a set percentage of a theoretical value;
step S400: when the detonation duration is longer than the set time, acquiring and analyzing the video signal and the audio signal on the site after detonation:
step S500: comparing the video signal and the audio signal of the site after the detonation with the video signal and the audio signal of the site before the detonation respectively, and judging:
whether the on-site flash intensity after detonation is greater than that before detonation or not, if so, sending a continuous warning prompt, returning to the step S400, and otherwise, entering the step S600;
whether the audio frequency component different from the audio frequency component before the detonation exists in the audio frequency signal of the site after the detonation, if so, sending out a continuous warning prompt, returning to the step S400, otherwise, entering the step S600;
step S600: and (4) field safety, warning prompt elimination.
After the arrangement and installation of the detonation site are finished, an operator leaves the site and confirms that no other personnel exist on the site, and then the system is started in an operation room; after the system is started, an operator needs to input necessary information, such as the type of initiating explosive devices and TNT equivalent value calculated by energetic material theory; after the information input is finished and confirmed, the master control and analysis unit controls the initiating explosive device resistance testing unit to measure the resistance of the initiating explosive device, if the resistance is qualified, the resistance is continued, if the resistance is not qualified, follow-up action is forbidden, and an operator is reminded to further check the resistance; after the resistance of the initiating explosive device is measured to be qualified, the master control and analysis unit applies corresponding initiation energy according to the type of the input initiating explosive device to carry out initiation, simultaneously monitors the waveform of initiation current of the initiating explosive device and collects and analyzes video, audio, temperature and pressure signals of an initiation site, if the waveform of the initiation current is unqualified, the flash intensity of the site after initiation is greater than that before initiation, audio components different from those before initiation exist in the site after initiation, the actually measured and calculated equivalent quantity of the TNT (total explosive temperature) is smaller than the set percentage of the theoretically calculated equivalent quantity of the TNT before initiation, for example, 20%, and the master control and analysis unit can continuously send out warning prompts to remind an operator of paying attention; if the detonation duration is longer than the set time, for example, 1 hour later, and the flash intensity of the detonation scene is equal to that before the detonation, other audio components different from those before the detonation do not exist in the scene, the master control and analysis unit considers that the scene is basically safe, the warning prompt is eliminated, and the operator can wear protective articles and enter the detonation scene for subsequent processing.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) the invention can test the resistance values of the initiating explosive device and the circuit before detonation, automatically judge whether the initiating explosive device and the circuit meet the detonation requirement, monitor the detonation current during detonation, collect and analyze video, audio, temperature and pressure information generated in the detonation process, intelligently analyze the safety condition of the detonation process site through the information fusion technology, and carry out overall-process and all-around intelligent monitoring on the detonation process of the initiating explosive device.
(2) The initiating explosive device is controlled and switched by the main control and analysis unit between the initiating explosive device resistance test unit and the initiating explosive device detonation and detonation current test unit by adopting the relay, the whole process is automatic, and manual intervention is not needed.
(3) The initiating explosive device detonation and detonation current testing unit measures the detonation current by adopting a method of serially connecting a sampling resistor in a detonation loop, and judges whether the initiating explosive device is fully detonated or not by analyzing the frequency, amplitude and rise time of the detonation current in a time domain.
(4) Acquiring field video information by adopting a miniature high-speed camera, and simultaneously capturing and analyzing the flash intensity of the field video to judge the situation of the detonation field; and (3) analyzing the signal characteristics of each component in the audio waveform by adopting the field audio signal collected by the capacitive high-sensitivity microphone and adopting fast Fourier transform, and judging the initiation field condition according to the signal characteristics.
Drawings
FIG. 1 is a block diagram of the system of the present invention;
FIG. 2 is a schematic circuit diagram of an initiating explosive device resistance testing unit and an initiating explosive device detonation and detonation current testing unit;
FIG. 3 is a block diagram of a monitoring unit;
FIG. 4 is a flow chart of a third embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.
Example 1:
referring to the attached drawing 1, an intelligent security system for monitoring the initiating explosive device detonation process comprises a master control and analysis unit, an initiating explosive device testing unit, an initiating explosive device detonation and detonation current testing unit and a monitoring unit, wherein the initiating explosive device testing unit, the initiating explosive device detonation and detonation current testing unit and the monitoring unit are respectively connected with the master control and analysis unit, and the monitoring unit comprises:
the initiating explosive device testing unit is used for measuring the static resistance of the initiating explosive device, transmitting the measured static resistance to the master control and analysis unit and switching the initiating explosive device which is qualified in measurement to the initiating explosive device detonation and detonation current testing unit;
the initiating explosive device detonation and detonation current testing unit and the initiating explosive device form a detonation loop, and are used for applying detonation energy under the control of the master control and analysis unit, monitoring the detonation current waveform flowing through the initiating explosive device at the same time, and sending the detonation current waveform to the master control and analysis unit;
the monitoring unit is used for monitoring the site video, the site audio, the temperature and the pressure of the detonation site and transmitting the detection result to the master control and analysis unit;
the master control and analysis unit is used for setting the parameters of the initiating explosive device detonation and detonation current test unit according to the type of the initiating explosive device when the initiating explosive device is judged to be qualified; the device is also used for analyzing and obtaining the characteristic parameter value of the detonation current waveform and judging whether the detonation current waveform is qualified or not; the device is also used for respectively comparing the site video, the site audio, the temperature and the pressure before and after the detonation, and judging whether the detonation is finished and whether the detonation is sufficient; and continuously giving out warning prompts when the initiating explosive device is unqualified, the detonation current waveform is unqualified, the detonation is not finished or the detonation is insufficient.
Before detonation, the initiating explosive device resistance testing unit can measure the static resistance of the initiating explosive device; each type of initiating explosive device has a qualified resistance value range, if the measured resistance value of the resistor is not in the range, the initiating explosive device is considered to have a problem, and the master control and analysis unit can prohibit the initiation and remind an operator to further check. In the process of detonation, the initiating explosive device detonation and detonation current testing unit can monitor the current waveform flowing through the initiating explosive device while applying detonation energy; if each type of initiating explosive device is detonated normally, the detonation current waveforms of the initiating explosive devices are similar, and the main characteristic parameter values (peak value, period and rise time) are all in a qualified range; if the measured main characteristic parameters of the detonation current are not in the qualified range, the master control and analysis unit judges that the detonation process of the initiating explosive device is abnormal and sends out an alarm prompt to remind an operator of paying attention.
In order to monitor the situation at the initiation site after initiation, a monitoring unit is installed already at the initiation site before initiation. The monitoring unit stores the acquired video information firstly and then transmits the video information to the master control and analysis unit, the master control and analysis unit displays the site video and analyzes the on-site flash intensity (namely the maximum image brightness value) after the detonation by adopting an image gray processing algorithm, and if the on-site flash intensity after the detonation is greater than that before the detonation, the master control and analysis unit can continuously send out a warning prompt to remind an operator to pay attention. The detonation site audio signals collected by the monitoring unit are amplified and signal conditioned and then acquired by the master control and analysis unit, and the master control and analysis unit performs fast Fourier transform on the acquired site audio waveforms to obtain signal characteristics, such as frequency, intensity and the like, of each component in the audio waveforms. If the master control and analysis unit finds that other audio components different from those before the detonation exist on the site after the detonation, the master control and analysis unit can continuously send out warning prompts to remind operators of paying attention. The temperature and pressure signals collected by the monitoring unit are amplified and signal conditioned respectively and then transmitted to the master control and analysis unit, the master control and analysis unit can obtain the pressure and temperature curve of the site after detonation, and the actual explosion TNT equivalent can be calculated according to the pressure and temperature curve and an empirical formula.
The high-frequency thermocouple and the pressure sensor are respectively transmitted to the master control and analysis unit through the preposed voltage amplifier and the preposed charge amplifier and then through the signal conditioning and acquisition circuit, the master control and analysis unit can obtain a variation curve of the pressure on site with time and a variation curve of the temperature on site with time after detonation, and the actual equivalent of the explosion TNT can be calculated through the master control and analysis unit according to the following formula:
k: constants associated with the explosion containment environment;
t: the explosion temperature;
p: the explosion pressure;
t 1: a detonation time point;
t 2: time point 30 minutes after initiation;
if the explosion TNT equivalent calculated by actual measurement is less than 20% of the explosion TNT equivalent calculated by theory before detonation, the total control and analysis unit judges that the detonation is insufficient, and the amount of the energetic materials with the TNT equivalent left on site is not reacted, and sends out an alarm prompt to remind an operator of paying attention. When the safety of the site is judged to be yes, the warning prompt is eliminated, and the operator can wear the protective articles and enter the detonation site for subsequent treatment.
Example 2:
on the basis of embodiment 1, with reference to fig. 2, the initiating explosive device testing unit includes a resistance measurement program-controlled constant current source, a signal conditioning and collecting circuit 1 and a relay drive control circuit, which are connected to the master control and analysis unit, the relay drive control circuit is connected to a relay, a stationary contact of the relay is connected to one end of the initiating explosive device, a movable contact of the relay is connected between the resistance measurement program-controlled constant current source and the initiating explosive device initiation and initiation current testing unit in a switching manner, the other end of the initiating explosive device is grounded, and two ends of the initiating explosive device are connected to the signal conditioning and collecting circuit 1. The initiating explosive device detonation and detonation current testing unit comprises a detonation energy program-controlled programmable pulse power source and a signal conditioning and collecting circuit 2, wherein the detonation energy program-controlled programmable pulse power source is connected with a detonation current sampling resistor, the signal conditioning and collecting circuit 2 collects voltage signals at two ends of the detonation current sampling resistor, processes the voltage signals and transmits the voltage signals to the main control and analyzing unit, and when initiating explosive devices are connected to the initiating explosive device detonation and detonation current testing unit, the detonation current sampling resistor is connected with the initiating explosive devices in series.
Before detonation, the master control and analysis unit firstly controls the relay drive control circuit to connect the initiating explosive device into a resistance measurement loop, then controls the program-controlled constant current source to output 5mA constant current test current, the test current flows through the detected initiating explosive device, voltage signals are generated at two ends of the detected initiating explosive device, the voltage signals enter the master control and analysis unit through the signal conditioning and acquisition circuit 1, and the resistance value of the detected initiating explosive device is obtained through calculation according to ohm's law. After the resistance value of the measured initiating explosive device is qualified, the master control and analysis unit controls the relay drive control circuit to connect the initiating explosive device into the detonation circuit, and sets parameters of the program-controlled programmable pulse power source according to the type of the initiating explosive device; after the detonation preparation work is finished, the master control and analysis unit sends a detonation ready indication to an operator, and after the operator triggers a detonation key, the master control and analysis unit controls the program-controlled programmable pulse power source to output detonation energy; before the initiation energy is input into the initiating explosive device, the initiation energy also flows through the initiation current sampling resistor, voltage signals are generated at two ends of the initiation current sampling resistor, the voltage signals enter the master control and analysis unit through the signal conditioning and acquisition circuit 2, and characteristic parameter values of initiation current waveforms can be obtained through digital signal analysis.
Example 3:
on the basis of embodiment 1 or 2, as shown in fig. 3, the monitoring unit includes video monitoring, audio monitoring, temperature monitoring, and pressure monitoring, wherein:
video monitoring, namely acquiring video information of a detonation site in real time by a micro high-speed camera, storing the video information to a hard disk video recorder, and transmitting the video information to a master control and analysis unit;
the audio monitoring is that a capacitance type high-sensitivity sound transmitter collects audio information of a detonation site, and the audio information is amplified by a preposed voltage amplifier, processed by a signal conditioning and collecting circuit and transmitted to a master control and analysis unit;
temperature monitoring, namely collecting temperature change of a detonation site by a high-frequency thermocouple, amplifying by a preposed voltage amplifier, processing by a signal conditioning and collecting circuit, and transmitting to a master control and analysis unit;
and pressure monitoring, namely collecting pressure change of a detonation site by a high-frequency pressure sensor, amplifying by a pre-charge amplifier, processing by a signal conditioning and collecting circuit, and transmitting to a master control and analysis unit.
In order to monitor the conditions of the detonation site after detonation, a miniature high-speed camera, a capacitive high-sensitivity sound transmitter, a high-frequency thermocouple and a pressure sensor are arranged and installed on the detonation site before detonation, and the video, audio, temperature and pressure change conditions of the detonation site can be comprehensively known through signal acquisition, amplification, conditioning and digital signal analysis. The video information collected by the miniature high-speed camera enters the hard disk video recorder for storage, then is transmitted to the master control and analysis unit, the master control and analysis unit displays the site video and captures and analyzes the flash intensity of the site after detonation, and if the flash intensity of the site after detonation is greater than that before detonation, the master control and analysis unit can continuously send out warning prompts to remind an operator of paying attention. The detonation field audio signals collected by the capacitance type high-sensitivity sound transmitter are acquired by the master control and analysis unit through the pre-voltage amplifier and the signal conditioning and collecting circuit, and the master control and analysis unit performs fast Fourier transform on the acquired field audio waveforms to obtain signal characteristics, such as frequency, intensity and the like, of each component in the audio waveforms. If the master control and analysis unit finds that other audio components different from those before the detonation exist on the site after the detonation, the master control and analysis unit can continuously send out warning prompts to remind operators of paying attention. The high-frequency thermocouple and the pressure sensor are respectively transmitted to the master control and analysis unit through the preposed voltage amplifier and the preposed charge amplifier and then through the signal conditioning and acquisition circuit, the master control and analysis unit can obtain a pressure and temperature curve of a site after detonation, and the actual explosion TNT equivalent can be calculated according to the pressure and temperature curve and an empirical formula. If the explosion TNT equivalent calculated by actual measurement is less than 20% of the explosion TNT equivalent calculated by theory before detonation, the total control and analysis unit judges that the detonation is insufficient, and the amount of the energetic materials with the TNT equivalent left on site is not reacted, and sends out an alarm prompt to remind an operator of paying attention.
Referring to fig. 4, a method for monitoring the detonation process of a initiating explosive device comprises the following steps:
a1: arranging a detonation site, enabling an operator to leave the site, confirming that no other personnel exist on the site, and then starting the system in an operation room;
a2: after the system is started, an operator needs to input necessary information, such as the type of initiating explosive devices and TNT equivalent value calculated by energetic material theory; after the information input is finished and confirmed, the master control and analysis unit controls the initiating explosive device resistance testing unit to measure the resistance of the initiating explosive device, if the resistance is qualified, the resistance is continued, if the resistance is not qualified, follow-up action is forbidden, and an operator is reminded to further check the resistance;
a3: after the resistance of the initiating explosive device is measured to be qualified, the monitoring unit collects a video signal and an audio signal on site before detonation, and the master control and analysis unit applies corresponding detonation energy to carry out detonation according to the type of the input initiating explosive device;
a4: monitoring the detonation current waveform of the initiating explosive device, and collecting and analyzing temperature and pressure signals of a detonation site;
a5: judging whether the detonation current waveform is qualified or not, judging whether the actually measured and calculated explosion TNT equivalent is less than 20% of the theoretically calculated explosion TNT equivalent before detonation or not, and if any one of the two is not satisfied, displaying a warning prompt;
a6: judging whether the detonation duration is longer than 1 hour, if not, waiting, and collecting and analyzing video and audio signals of the detonation site when the detonation duration is longer than 1 hour;
a7: judging whether the flash intensity of the site after detonation is greater than that before detonation or not, judging whether other audio components different from the audio components before detonation exist in the site after detonation or not, if not, judging that the site is normal safety, eliminating the warning prompt, and enabling operators to wear protective articles and enter the site of detonation for subsequent processing.
Although the present invention has been described herein with reference to the illustrated embodiments thereof, which are intended to be preferred embodiments of the present invention, it is to be understood that the invention is not limited thereto, and that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure.
Claims (5)
1. The utility model provides a keep watch on intelligent security system of initiating explosive device detonation process, includes initiating explosive device test unit for measure the static resistance of initiating explosive device, its characterized in that still includes initiating explosive device detonation and initiation current test unit and the monitoring unit of always controlling and the analysis unit, being connected respectively with always controlling the analysis unit, wherein:
the initiating explosive device testing unit transmits the measured static resistance to the master control and analysis unit and is also used for switching the initiating explosive device which is qualified in measurement to the initiating explosive device detonation and detonation current testing unit;
the initiating explosive device detonation and detonation current testing unit and the initiating explosive device form a detonation loop, and are used for applying detonation energy under the control of the master control and analysis unit, monitoring the detonation current waveform flowing through the initiating explosive device at the same time, and sending the detonation current waveform to the master control and analysis unit;
the monitoring unit is used for monitoring the site video, the site audio, the temperature and the pressure of the detonation site and transmitting the detection result to the master control and analysis unit;
the master control and analysis unit is used for setting the parameters of the initiating explosive device detonation and detonation current test unit according to the type of the initiating explosive device when the initiating explosive device is judged to be qualified; the device is also used for analyzing and obtaining the characteristic parameter value of the detonation current waveform and judging whether the detonation current waveform is qualified or not; the device is also used for respectively comparing the site video, the site audio, the temperature and the pressure before and after the detonation, and judging whether the detonation is finished and whether the detonation is sufficient; and continuously giving out warning prompts when the initiating explosive device is unqualified, the detonation current waveform is unqualified, the detonation is not finished or the detonation is insufficient.
2. The intelligent security system for monitoring the detonation process of the initiating explosive device according to claim 1, wherein the initiating explosive device testing unit comprises a resistance measurement program-controlled constant current source, a signal conditioning and collecting circuit 1 and a relay driving control circuit, the resistance measurement program-controlled constant current source, the signal conditioning and collecting circuit 1 and the relay driving control circuit are connected with a relay, a static contact of the relay is connected with one end of the initiating explosive device, a movable contact of the relay is connected between the resistance measurement program-controlled constant current source and the initiating explosive device detonation and detonation current testing unit in a switching mode, the other end of the initiating explosive device is grounded, and two ends of the initiating explosive device are connected with the signal conditioning and collecting circuit 1.
3. The intelligent security system for monitoring the detonation process of the initiating explosive device according to claim 2, wherein the initiating explosive device detonation and detonation current testing unit comprises a detonation energy program-controlled programmable pulse power source and a signal conditioning and collecting circuit 2 which are connected with a master control and analyzing unit, the detonation energy program-controlled programmable pulse power source is connected with a detonation current sampling resistor, the signal conditioning and collecting circuit 2 collects voltage signals at two ends of the detonation current sampling resistor, processes the voltage signals and transmits the voltage signals to the master control and analyzing unit, and when the initiating explosive device is connected to the initiating explosive device detonation and detonation current testing unit, the detonation current sampling resistor is connected with the initiating explosive device in series.
4. The intelligent security system for monitoring initiating explosive device detonation process according to any one of claims 1-3, characterized in that said monitoring unit comprises video monitoring, audio monitoring, temperature monitoring and pressure monitoring, wherein:
video monitoring, namely acquiring video information of a detonation site in real time by a micro high-speed camera, storing the video information to a hard disk video recorder, and transmitting the video information to a master control and analysis unit;
the audio monitoring is that a capacitance type high-sensitivity sound transmitter collects audio information of a detonation site, and the audio information is amplified by a preposed voltage amplifier, processed by a signal conditioning and collecting circuit and transmitted to a master control and analysis unit;
temperature monitoring, namely collecting temperature change of a detonation site by a high-frequency thermocouple, amplifying by a preposed voltage amplifier, processing by a signal conditioning and collecting circuit, and transmitting to a master control and analysis unit;
and pressure monitoring, namely collecting pressure change of a detonation site by a high-frequency pressure sensor, amplifying by a pre-charge amplifier, processing by a signal conditioning and collecting circuit, and transmitting to a master control and analysis unit.
5. A method of monitoring the initiation of a pyrotechnic charge, comprising:
step S100: collecting a video signal and an audio signal on site before detonation;
step S200: measuring the static resistance of the initiating explosive device, and initiating the initiating explosive device according to the type of the initiating explosive device when the static resistance of the initiating explosive device is within the qualified resistance range;
step S300: the method comprises the following steps:
A. monitoring the detonation current waveform of the initiating explosive device, performing time domain analysis on the detonation current waveform to obtain the frequency, amplitude and rise time of the detonation current, judging whether the detonation current waveform is qualified, and sending a continuous warning prompt when the detonation current waveform is analyzed and judged to be unqualified;
B. collecting temperature and pressure signals of a detonation site, forming a pressure and temperature curve, calculating the equivalent weight of explosive TNT according to the pressure and temperature curve and an empirical formula, and sending a continuous warning prompt when the equivalent weight of explosive TNT is smaller than a set percentage of a theoretical value;
step S400: when the detonation duration is longer than the set time, acquiring and analyzing the video signal and the audio signal on the site after detonation:
step S500: comparing the video signal and the audio signal of the site after the detonation with the video signal and the audio signal of the site before the detonation respectively, and judging:
whether the on-site flash intensity after detonation is greater than that before detonation or not, if so, sending a continuous warning prompt, returning to the step S400, and otherwise, entering the step S600;
whether the audio frequency component different from the audio frequency component before the detonation exists in the audio frequency signal of the site after the detonation, if so, sending out a continuous warning prompt, returning to the step S400, otherwise, entering the step S600;
step S600: and (4) field safety, warning prompt elimination.
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