CN113660554B - Large-scale sensing system electric signal time division multiplexing data acquisition device and system - Google Patents
Large-scale sensing system electric signal time division multiplexing data acquisition device and system Download PDFInfo
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- CN113660554B CN113660554B CN202110968334.8A CN202110968334A CN113660554B CN 113660554 B CN113660554 B CN 113660554B CN 202110968334 A CN202110968334 A CN 202110968334A CN 113660554 B CN113660554 B CN 113660554B
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Abstract
The application discloses a device and a system for acquiring electrical signal time division multiplexing data of a large-scale sensing system, wherein the device comprises a plurality of groups of electrical/optical/electrical delay line modules, a channel time division switch array and a data acquisition system, wherein each group of electrical/optical/electrical delay line modules is connected with the channel time division switch array, and the channel time division switch array is connected with the data acquisition system; each group of electric/optical/electric delay line modules is used for receiving a group of electric signals and converting and delaying the electric signals to obtain a group of processed electric signals; the channel time division switch array is used for carrying out time division multiplexing on the plurality of groups of processed electric signals to corresponding data acquisition channels; the data acquisition system is used for acquiring and storing the electric signals after time division multiplexing of the channel time division switch array. The application can realize the time division transmission control of the electric signals of a plurality of sensors and the acquisition of the signals of a plurality of synchronous sensors by one data acquisition channel, thereby greatly saving the requirements of an oscilloscope/a data acquisition system.
Description
Technical Field
The application relates to the related technical fields of sensors, data acquisition, automatic control, system integration and the like, in particular to a device and a system for acquiring electrical signal time division multiplexing data of a large-scale sensing system.
Background
In weapon physics experiments, to obtain the physical states of the physical device in the time range of impact loading microsecond to tens of microsecond, a large number of sensors are needed to obtain the physical states, the sensors convert the physical states into electric signals, and then a high-bandwidth (more than or equal to 500 MHz) oscilloscope/data acquisition system is used to record the data. Along with the continuous improvement of the requirement of high spatial resolution in physical research, the number of sensor paths used simultaneously in one experiment reaches hundreds of paths or even hundreds of paths, and the requirement on the number of channels of an oscilloscope/a data acquisition system is increased. In order to meet the electric signal acquisition requirement of a large-scale sensing system, the resource waste exists in a mode of simply adopting the channel stacking capacity expansion of the oscilloscope/data acquisition system, and the problems that the foreign high-performance oscilloscope/data acquisition system is influenced by international trade war and is difficult to purchase and the like are solved.
Disclosure of Invention
Aiming at the problems that the resource waste exists in a mode of simply adopting the channel stacking capacity expansion of the oscilloscope/data acquisition system to meet the electric signal acquisition requirement of a large-scale sensing system, the foreign high-performance oscilloscope/data acquisition system is influenced by international trade war and is difficult to purchase, and the like. The application aims to provide a device and a system for acquiring time division multiplexing data of electric signals of a large-scale sensing system, which can realize time division transmission control of electric signals of a plurality of sensors and acquisition of signals of a plurality of synchronous sensors by one data acquisition channel, thereby greatly saving the requirements of an oscilloscope/a data acquisition system.
The application is realized by the following technical scheme:
in a first aspect, the application provides a device for acquiring time division multiplexing data of electric signals of a large-scale sensing system, which comprises a plurality of groups of electric/optical/electric delay line modules, a channel time division switch array and a data acquisition system, wherein each group of electric/optical/electric delay line modules is connected with the channel time division switch array, and the channel time division switch array is connected with the data acquisition system;
each group of the electric/optical/electric delay line modules is used for receiving a group of electric signals, converting and delaying the electric signals to obtain a group of processed electric signals;
the channel time division switch array is used for performing time division multiplexing on the plurality of groups of processed electric signals to corresponding data acquisition channels;
the data acquisition system is used for acquiring and storing the electric signals after the time division multiplexing of the channel time division switch array;
the time division transmission control of a plurality of sensor electric signals and the acquisition of a plurality of synchronous sensor signals by one data acquisition channel are realized by combining an electric/optical/electric delay line module, a channel time division switch array and a data acquisition system.
The working principle is as follows: aiming at the problems that resource waste exists in a mode of simply adopting an oscilloscope/data acquisition system channel to stack and expand capacity in order to meet the electric signal acquisition requirement of a large-scale sensing system, and the foreign high-performance oscilloscope/data acquisition system is influenced by international trade war and is difficult to purchase; the application designs a large-scale sensing system electric signal time division multiplexing data acquisition device, which mainly comprises three parts: (1) an electrical/optical/electrical delay line module; (2) an array of channel time division switches; (3) an oscilloscope/data acquisition system; taking 5 mu s after the trigger signal reaches when 8 paths of electric signals are combined into 1 path and the maximum effective time window of the sensor signal is zero as an example, the working principle is as follows: the 8 paths of signals are transmitted for equal-difference (5 mu s) time delay, so that the 8 paths of signals are separated in the time domain, the channel switch is synchronously controlled according to the time delay sequence, and only effective signals enter the data acquisition channel, so that the 8 paths of signals can be acquired through the 1 path of data acquisition channel, and the 8 paths of signals are distributed on the 1 path of data acquisition channel in a sectional sequence every 5 mu s of time. Signals 2-1 to 2-8 are time division multiplexed to the data acquisition channel 2, so that the signals are connected in parallel to realize a large-scale data acquisition system.
The application can realize the time division transmission control of the electric signals of a plurality of sensors and the acquisition of the signals of a plurality of synchronous sensors by one data acquisition channel, thereby greatly saving the requirements of an oscilloscope/a data acquisition system.
Further, the channel time division switch array comprises a plurality of groups of channel time division switches and a channel time division switch controller, and each group of channel time division switches comprises a plurality of channel time division switches;
each group of electric/optical/electric delay line modules receives a plurality of electric signals, the first electric signal is connected with a channel time division switch corresponding to the first electric signal, each electric signal is sequentially connected with an electro-optical conversion unit, an optical fiber delay line and a photoelectric conversion unit corresponding to the second electric signal, and the photoelectric conversion unit is connected with the corresponding channel time division switch; each channel time-division switch is connected with the channel time-division switch controller, and the channel time-division switch controller is connected with the data acquisition system through a trigger channel; each channel time-division switch is connected with a data acquisition system through a common group channel;
each group of multipath electric signal transmission carries out equal-difference time delay, so that multipath signals are separated in the time domain, channel switching is synchronously controlled according to the time delay sequence, only effective signals enter data acquisition group channels, the multipath signals are acquired through 1 data acquisition group channel, and the multipath signals are distributed on 1 data acquisition group channel in a piecewise sequence every fixed time;
the multiple groups of electric signals are connected in parallel, and the multiple groups of multiple electric signals are time-division multiplexed to the corresponding data acquisition group channels, so that a large-scale data acquisition system is realized.
Further, each group of multipath electric signal transmission is subjected to equal-difference time delay, so that multipath signals are separated in time domain, and the specific implementation process is as follows:
zero delay of the first electric signal;
the second electric signal is converted into an optical signal through an electro-optical converter, and the optical signal is transmitted through a long-distance optical fiber delay line for delaying A [ mu ] s, and then is recovered into an electric signal through the electro-optical converter;
the third electric signal is converted into an optical signal through an electro-optical converter, the optical signal is transmitted through an optical fiber delay line with the corresponding length for delaying 2 XA mu s, and then the optical signal is recovered into an electric signal through an electro-optical converter;
similarly, the 1 st to nth signals are transmitted through the corresponding length optical fiber delay line for delaying (n-1) x A [ mu ] s.
Furthermore, the channel switch is synchronously controlled according to the delay sequence, only effective signals enter the data acquisition group channel, so that the acquisition of multiple paths of signals through 1 path of data acquisition group channel is realized, and the multiple paths of signals are distributed on the 1 path of data acquisition group channel in a sectional sequence every fixed time; the specific implementation process is as follows:
each group of multipath electric signals passes through a channel time division switch, the channel time division switch controls the on and off of a plurality of switches by a channel time division switch controller, and when the switch is opened, signals of the channel are transmitted into a data acquisition channel;
the channel time division switch is in a normally closed state, is triggered to start working by a zero-time trigger signal, and is turned on for a duration A mu s; then turning on a switch of the second electric signal for a duration of A [ mu ] s; and so on, multiple paths of electric signals are transmitted into the data acquisition system through synchronous coordination of time delay and switch control.
Further, each path of electric signal corresponds to the corresponding switch one by one.
Further, the a μs is determined according to a standard of the optical fiber delay line, for example, may be 5 μs or 2 μs.
Further, the data acquisition system employs an oscilloscope.
In a second aspect, the application also provides an explosive detonation wave control acquisition system for time division multiplexing of the electric signals of the large-scale sensing system, which comprises the electric signal time division multiplexing data acquisition device of the large-scale sensing system, an electric probe test system and a detonation control system;
the electric probe testing system is connected with the time measuring sensor on the test explosive and is used for acquiring the electric signal of the time measuring sensor on the test explosive;
and one end of the detonation control system is connected with the detonation point of the test explosive, and the other end of the detonation control system is connected with the time-division switch controller through a zero-time trigger signal, and is used for controlling the delay A mu s after the detonation of the test explosive to trigger the start action, so that the synchronous control of signal transmission is realized.
Further, the time measurement sensor adopts electric probes, and the electric probes are uniformly and densely arranged on the spherical surface of the test explosive in an array manner and are used for measuring the time when detonation reaches the spherical surface of the test explosive.
Further, the test explosive is hemispherical and has a diameter of 200mm.
Compared with the prior art, the application has the following advantages and beneficial effects:
1. the application can greatly improve the channel utilization rate of an oscilloscope/data acquisition system in the existing large-scale electric signal sensing system. Taking 8 channels and 5 mu s time division multiplexing as an example, a 384 (6 multiplied by 8 multiplied by 8=384) point sensing test can be realized by a 6-channel oscilloscope, the channel utilization rate is improved to 8 times, and 336 (384-6 multiplied by 8=336) channels of oscilloscopes/data acquisition channels are saved; with 40 paths of 1 mu s time division multiplexing, 640 (2×8×40=640) paths of sensing tests can be realized by the 2-path 8-path oscilloscope, the utilization rate of the path is improved to 40 times, and 624 paths of oscilloscopes/data acquisition paths (640-2×8=624) are saved. Thereby greatly reducing the system cost.
2. The application can realize the time division transmission control of the electric signals of a plurality of sensors and the acquisition of the signals of a plurality of synchronous sensors by one data acquisition channel, thereby greatly saving the requirements of an oscilloscope/a data acquisition system.
Drawings
The accompanying drawings, which are included to provide a further understanding of embodiments of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings:
FIG. 1 is a schematic diagram of a large-scale sensor system electrical signal time division multiplexing data acquisition device.
FIG. 2 is a schematic diagram of a large-scale sensing system with electrical signals time division multiplexed explosive detonation wave control acquisition system.
Detailed Description
For the purpose of making apparent the objects, technical solutions and advantages of the present application, the present application will be further described in detail with reference to the following examples and the accompanying drawings, wherein the exemplary embodiments of the present application and the descriptions thereof are for illustrating the present application only and are not to be construed as limiting the present application.
Example 1
As shown in fig. 1, the device for acquiring the time division multiplexing data of the electric signals of the large-scale sensing system comprises a plurality of groups of electric/optical/electric delay line modules, a channel time division switch array and a data acquisition system, wherein each group of electric/optical/electric delay line modules is connected with the channel time division switch array, and the channel time division switch array is connected with the data acquisition system;
each group of the electric/optical/electric delay line modules is used for receiving a group of electric signals, converting and delaying the electric signals to obtain a group of processed electric signals;
the channel time division switch array is used for performing time division multiplexing on the plurality of groups of processed electric signals to corresponding data acquisition channels;
the data acquisition system is used for acquiring and storing the electric signals after the time division multiplexing of the channel time division switch array;
the time division transmission control of a plurality of sensor electric signals and the acquisition of a plurality of synchronous sensor signals by one data acquisition channel are realized by combining an electric/optical/electric delay line module, a channel time division switch array and a data acquisition system.
Specifically, the channel time division switch array comprises a plurality of groups of channel time division switches and a channel time division switch controller, and each group of channel time division switches comprises a plurality of channel time division switches;
each group of electric/optical/electric delay line modules receives a plurality of electric signals, the first electric signal is connected with a channel time division switch corresponding to the first electric signal, each electric signal is sequentially connected with an electro-optical conversion unit, an optical fiber delay line and a photoelectric conversion unit corresponding to the second electric signal, and the photoelectric conversion unit is connected with the corresponding channel time division switch; each channel time-division switch is connected with the channel time-division switch controller, and the channel time-division switch controller is connected with the data acquisition system through a trigger channel; each channel time-division switch is connected with a data acquisition system through a common group channel;
each group of multipath electric signal transmission carries out equal-difference time delay, so that multipath signals are separated in the time domain, channel switching is synchronously controlled according to the time delay sequence, only effective signals enter data acquisition group channels, the multipath signals are acquired through 1 data acquisition group channel, and the multipath signals are distributed on 1 data acquisition group channel in a piecewise sequence every fixed time;
the multiple groups of electric signals are connected in parallel, and the multiple groups of multiple electric signals are time-division multiplexed to the corresponding data acquisition group channels, so that a large-scale data acquisition system is realized.
The specific working mode is as follows:
zero delay of the first electric signal;
the second electric signal is converted into an optical signal through an electro-optical converter, and the optical signal is transmitted through a long-distance optical fiber delay line for delaying A [ mu ] s, and then is recovered into an electric signal through the electro-optical converter;
the third electric signal is converted into an optical signal through an electro-optical converter, the optical signal is transmitted through an optical fiber delay line with the corresponding length for delaying 2 XA mu s, and then the optical signal is recovered into an electric signal through an electro-optical converter;
similarly, the 1 st to nth signals are transmitted through the corresponding length optical fiber delay line for delaying (n-1) x A [ mu ] s.
Each group of multipath electric signals passes through a channel time division switch, the channel time division switch controls the on and off of a plurality of switches by a channel time division switch controller, and when the switch is opened, signals of the channel are transmitted into a data acquisition channel;
the channel time division switch is in a normally closed state, is triggered to start working by a zero-time trigger signal, and is turned on for a duration A mu s; then turning on a switch of the second electric signal for a duration of A [ mu ] s; and so on, multiple paths of electric signals are transmitted into the data acquisition system through synchronous coordination of time delay and switch control.
In the implementation, each path of electric signal corresponds to the corresponding switch one by one, and in the processing process of each group of multipath electric signals, only one switch is closed at the same time, and other switches are all opened.
The a μs is selected and determined according to the standard of the optical fiber delay line, for example, the a μs can be 5 μs or 2 μs, if the standard of the optical fiber delay line is 5 μs, the transmission delay of the second electric signal is 5 μs, the transmission delay of the third electric signal is 2×5 μs, and so on.
The data acquisition system may be an oscilloscope or another data acquisition system, which is not limited again.
In the specific implementation, taking the example that 8 paths of electric signals are combined into 1 path, and the maximum effective time window of the sensor signal is zero, the trigger signal reaches 5 mu s after the trigger signal reaches, the following is explained:
the first group of 8-path signal transmission carries out an equal difference (5 mu s) time delay, so that 8-path signals are separated in the time domain, channel switching is synchronously controlled according to the time delay sequence, only effective signals enter a data acquisition channel, and therefore 8-path signals can be acquired through 1-path data acquisition channels, and the 8-path signals are distributed on 1-path data acquisition channels in a time segmentation sequence of every 5 mu s. The second group of 8 signals (signals 2-1 to 2-8) are time division multiplexed to the data acquisition channel 2 so as to be connected in parallel, and the switch control of the corresponding serial number signals of each group of signals is controlled by the same time division control signal, so that a large-scale data acquisition system is realized.
The specific working mode is as follows:
zero delay of the first electric signal; the second electric signal 1-2 converts the electric signal into an optical signal through an electro-optic converter, and the optical signal is transmitted through a long-distance optical fiber delay line for 5 mu s and then is recovered into the electric signal through the electro-optic converter; the third electric signal 1-3 converts the electric signal into an optical signal through an electro-optic converter, the optical signal is transmitted through an optical fiber delay line with the corresponding length for delaying 2X 5 mu s, and then the optical signal is recovered into the electric signal through the electro-optic converter; similarly, the 1 st to nth signals are transmitted through the corresponding length optical fiber delay line for delay time (n-1) x 5 mu s. Then each group of multipath electric signals passes through a channel time division switch, the channel time division switch controls the on and off of 8 switches by a channel time division switch controller, and only when the switch is opened, the signals of the channel can be transmitted into a data acquisition channel; the channel time division switch is in a normally closed state, is triggered to start working by a zero-time trigger signal, and is turned on for 5 mu s and turned off; then the switch of the second electric signal is turned on for 5 mu s; and by analogy, 8 paths of electric signals are transmitted into the oscilloscope through synchronous coordination of delay and switch control. The oscilloscope collects and stores the data.
The application can greatly improve the channel utilization rate of an oscilloscope/data acquisition system in the existing large-scale electric signal sensing system. Taking 8 channels and 5 mu s time division multiplexing as an example, a 384 (6 multiplied by 8 multiplied by 8=384) point sensing test can be realized by a 6-channel oscilloscope, the channel utilization rate is improved to 8 times, and 336 (384-6 multiplied by 8=336) channels of oscilloscopes/data acquisition channels are saved; with 40 paths of 1 mu s time division multiplexing, 640 (2×8×40=640) paths of sensing tests can be realized by the 2-path 8-path oscilloscope, the utilization rate of the path is improved to 40 times, and 624 paths of oscilloscopes/data acquisition paths (640-2×8=624) are saved. Thereby greatly reducing the system cost.
The application can realize the time division transmission control of the electric signals of a plurality of sensors and the acquisition of the signals of a plurality of synchronous sensors by one data acquisition channel, thereby greatly saving the requirements of an oscilloscope/a data acquisition system.
Example 2
As shown in fig. 2, the difference between the present embodiment and embodiment 1 is that the present embodiment provides an explosive detonation wave control acquisition system with time division multiplexing of electrical signals of a large-scale sensing system, and an explosive detonation wave control acquisition system with time division multiplexing of electrical signals of a large-scale sensing system, which includes an electrical signal time division multiplexing data acquisition device of a large-scale sensing system described in embodiment 1, and further includes an electrical probe test system and a detonation control system;
the electric probe testing system is connected with the time measuring sensor on the test explosive and is used for acquiring the electric signal of the time measuring sensor on the test explosive;
and one end of the detonation control system is connected with the detonation point of the test explosive, and the other end of the detonation control system is connected with the time-division switch controller through a zero-time trigger signal, and is used for controlling the delay A mu s after the detonation of the test explosive to trigger the start action, so that the synchronous control of signal transmission is realized.
In the embodiment, the detonation wave propagation synchronicity test of the explosive is taken as an example, the hemispherical explosive is detonated, and electric probes (time measuring sensors) are uniformly and densely distributed on the spherical surface of the explosive: the diameter of the hemispherical explosive is 200mm, and 300 electric probes are uniformly distributed on the hemispherical surface and used for measuring the time for detonation to reach the spherical surface. The detonator initiation power-on time is taken as a time reference, and the predicted distribution range of the arrival time of 300 electrical measurement signals is 11 mu s-13 mu s. Aiming at the application, the application scheme of the explosive detonation wave control acquisition system for time division multiplexing of the electric signals of the large-scale sensing system is designed as follows: the effective time window is designed to be 2 mu s, the multiplexing path number is designed to be 20 paths of 1, and the design test system is shown in figure 2.
According to the application, 300 measuring points are divided into 15 groups, each 20 signals are grouped, 2 mu s of equal differential time division control transmission is carried out to enter a 1-path oscilloscope data acquisition channel, so that 300 paths of electrical measurement signals can be obtained through the 15 paths of data acquisition channels, wherein a channel time division switch controller is triggered to start to act by 9 mu s of delay after initiation of an initiation control system, and synchronous control of signal transmission is realized.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application 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 application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations 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.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the application, and is not meant to limit the scope of the application, but to limit the application to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the application are intended to be included within the scope of the application.
Claims (8)
1. The device is characterized by comprising a plurality of groups of electric/optical/electric delay line modules, a channel time-division switch array and a data acquisition system, wherein each group of electric/optical/electric delay line modules is connected with the channel time-division switch array, and the channel time-division switch array is connected with the data acquisition system;
each group of the electric/optical/electric delay line modules is used for receiving a group of electric signals, converting and delaying the electric signals to obtain a group of processed electric signals;
the channel time division switch array is used for performing time division multiplexing on the plurality of groups of processed electric signals to corresponding data acquisition channels;
the data acquisition system is used for acquiring and storing the electric signals after the time division multiplexing of the channel time division switch array;
the method comprises the steps of combining an electric/optical/electric delay line module, a channel time-division switch array and a data acquisition system to realize time-division transmission control of a plurality of sensor electric signals and acquisition of a plurality of synchronous sensor signals by one data acquisition channel;
the channel time division switch array comprises a plurality of groups of channel time division switches and a channel time division switch controller, and each group of channel time division switches comprises a plurality of channel time division switches;
each group of electric/optical/electric delay line modules receives a plurality of electric signals, the first electric signal is connected with a channel time division switch corresponding to the first electric signal, each electric signal is sequentially connected with an electro-optical conversion unit, an optical fiber delay line and a photoelectric conversion unit corresponding to the second electric signal, and the photoelectric conversion unit is connected with the corresponding channel time division switch; each channel time-division switch is connected with the channel time-division switch controller, and the channel time-division switch controller is connected with the data acquisition system through a trigger channel; each channel time-division switch is connected with a data acquisition system through a common group channel;
each group of multipath electric signal transmission carries out equal-difference time delay, so that multipath signals are separated in the time domain, channel switching is synchronously controlled according to the time delay sequence, only effective signals enter data acquisition group channels, the multipath signals are acquired through 1 data acquisition group channel, and the multipath signals are distributed on 1 data acquisition group channel in a piecewise sequence every fixed time;
the multiple groups of electric signals are connected in parallel, and the multiple groups of multiple electric signals are time-division multiplexed to the corresponding data acquisition group channels, so that a large-scale data acquisition system is realized;
each group of multipath electric signal transmission carries out equal difference time delay, so as to realize the separation of multipath signals in time domain, and the specific implementation process is as follows:
zero delay of the first electric signal;
the second electric signal is converted into an optical signal through an electro-optical converter, and the optical signal is transmitted through a long-distance optical fiber delay line for delaying A [ mu ] s, and then is recovered into an electric signal through the electro-optical converter;
the third electric signal is converted into an optical signal through an electro-optical converter, the optical signal is transmitted through an optical fiber delay line with the corresponding length for delaying 2 XA mu s, and then the optical signal is recovered into an electric signal through an electro-optical converter;
similarly, the 1 st to nth signals are transmitted through the optical fiber delay line with the corresponding length for delaying (n-1) x A mu s;
aμs is 5 μs.
2. The device for time division multiplexing data acquisition of electrical signals of a large-scale sensing system according to claim 1, wherein the channel switch is synchronously controlled according to a time delay sequence, only effective signals enter a data acquisition group channel, and the acquisition of multiple signals through 1 data acquisition group channel is realized, wherein the multiple signals are distributed on the 1 data acquisition group channel in a piecewise sequence every fixed time; the specific implementation process is as follows:
each group of multipath electric signals passes through a channel time division switch, the channel time division switch controls the on and off of a plurality of switches by a channel time division switch controller, and when the switch is opened, signals of the channel are transmitted into a data acquisition channel;
the channel time division switch is in a normally closed state, is triggered to start working by a zero-time trigger signal, and is turned on for a duration A mu s; then turning on a switch of the second electric signal for a duration of A [ mu ] s; and so on, multiple paths of electric signals are transmitted into the data acquisition system through synchronous coordination of time delay and switch control.
3. The device for time division multiplexing data acquisition of electrical signals of a large-scale sensing system according to claim 2, wherein each electrical signal corresponds to its corresponding switch one by one.
4. The device of claim 1, wherein the a μs is determined according to a standard of an optical fiber delay line.
5. The device for time division multiplexing data acquisition of electrical signals in a large-scale sensing system according to claim 1, wherein said data acquisition system employs an oscilloscope.
6. An explosive detonation wave control acquisition system for time division multiplexing of electric signals of a large-scale sensing system, which is characterized by comprising the electric signal time division multiplexing data acquisition device of the large-scale sensing system, an electric probe test system and a detonation control system, wherein the electric probe test system comprises a main body, a main body and a main body;
the electric probe testing system is connected with the time measuring sensor on the test explosive and is used for acquiring the electric signal of the time measuring sensor on the test explosive;
and one end of the detonation control system is connected with the detonation point of the test explosive, and the other end of the detonation control system is connected with the time-division switch controller through a zero-time trigger signal, and is used for controlling the delay A mu s after the detonation of the test explosive to trigger the start action, so that the synchronous control of signal transmission is realized.
7. The system for controlling and collecting detonation waves of an explosive by time division multiplexing of electric signals of a large-scale sensing system according to claim 6, wherein the time measurement sensor adopts electric probes which are uniformly arranged on the spherical surface of the test explosive in an array manner and are used for measuring the time for the detonation to reach the spherical surface of the test explosive.
8. The system of claim 6, wherein the test explosive is hemispherical and has a diameter of 200mm.
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