CN114785326B - Synchronous triggering system of electricity experiment data recording equipment - Google Patents
Synchronous triggering system of electricity experiment data recording equipment Download PDFInfo
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- CN114785326B CN114785326B CN202210696677.8A CN202210696677A CN114785326B CN 114785326 B CN114785326 B CN 114785326B CN 202210696677 A CN202210696677 A CN 202210696677A CN 114785326 B CN114785326 B CN 114785326B
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Abstract
The invention relates to the technical field of electrical experiment devices, in particular to a synchronous triggering system of electrical experiment data recording equipment, which comprises: a trigger signal generator for generating pulses at intervals; the delay correction module is used for recording the inherent trigger delays of different experimental devices into the trigger delays of other experimental devices, so that the devices with different inherent trigger delays can be triggered at the same time; the trigger device is used for synchronous triggering; the time delay calibration device is used for calibrating the inherent trigger time delay of different experimental equipment; the trigger signal generator, the delay correction module and the trigger device are sequentially connected, and the delay calibration device is connected with the trigger signal generator. The invention ensures that different data recording devices trigger and record data at the same time, thereby solving the problem of data asynchronism caused by different inherent delays of the devices.
Description
Technical Field
The invention relates to the technical field of electrical experiment devices, in particular to a synchronous triggering system of electrical experiment data recording equipment.
Background
The experimental data recording is the most important link in the electrical experiment, the diversified development of the data processing method leads the demand on the type of the electrical experimental data to be higher and higher, but because of the development of automation and intellectualization high speed in recent years, the experimental data recording equipment has different triggering modes and triggering inherent delays due to different functions and architectures, the data synchronization method after the multi-type data acquisition experiment is too complicated, the experimental efficiency is reduced, and the time difference between different types of data can cause the analysis of the experimental phenomenon to generate deviation.
At present, different types of experimental data synchronization modes are mainly manual synchronization of experimenters, and delay calibration is required after data are acquired in each experiment, so that consistency of data and phenomena is poor, and part of important data may be lost due to short experiment duration in some transient experiments.
Disclosure of Invention
In order to solve the technical problems and overcome the defects of the existing experiment data synchronization mode, the invention provides a synchronization triggering system for electrical experiment data recording equipment, which is suitable for various electrical experiments, does not need data post-processing, and is compatible with most of experiment equipment and expandable in the number of synchronization equipment.
The invention discloses a synchronous triggering system of electrical experiment data recording equipment, which comprises:
a trigger signal generator for generating pulses at intervals;
the delay correction module is used for counting the inherent trigger delays of different experimental devices into the trigger delays of other experimental devices, so that the devices with different inherent trigger delays can be triggered at the same time;
the trigger device is used for synchronously triggering;
the time delay calibration device is used for calibrating the inherent trigger time delay of different experimental equipment;
the trigger signal generator, the delay correction module and the trigger device are sequentially connected, and the delay calibration device is connected with the trigger signal generator.
Preferably, the trigger signal generator generates a pulse immediately upon start-up and again after a time interval T0.
Preferably, the delay correction module outputs a high level after a time T1 is delayed after receiving the rising edge of the pulse.
Preferably, the delay calibration device at least comprises: the device comprises a light source module and a signal module.
Preferably, the time delay calibration means is activated immediately after receiving the second pulse generated by the trigger signal generator.
Preferably, the time delay calibration device starts the light source module and the signal module immediately after starting.
Preferably, the activation of the light source module may be recorded by a video data recording device, and the output variation of the signal module may be recorded by an analog, digital data recording device.
Preferably, the triggering device comprises at least: level trigger interface and mechanical switch trigger mechanism.
Preferably, the level trigger interface can output a level signal meeting the requirements of the data recording equipment, and the mechanical switch trigger mechanism can adjust the switch depth.
Preferably, the triggering device is of different types for different triggering modes of the experimental equipment.
Compared with the prior art, the invention has the following technical effects:
1) The invention adopts the delay correction module to ensure that the equipment with different inherent trigger delays can be triggered at the same time, thereby overcoming the defect of data asynchronism among different equipment caused by the inherent trigger delay of the data recording equipment, needing no manual later-stage correction delay, and realizing the data synchronization among different experimental data recording equipment by only carrying out one-time delay correction before the start of an experiment.
2) The synchronous triggering system provided by the invention utilizes the delay calibration device, can measure the inherent trigger delay of the equipment before the start of an experiment, does not need actual experiment calibration, and can be independently accessed into the experimental data recording equipment for debugging and calibration.
3) The trigger system provided by the invention can realize synchronous trigger of the equipment without the external trigger interface by using different types of trigger devices, and overcomes the limitation of the type of the triggered equipment to the trigger system.
Drawings
Fig. 1 is a block diagram of a synchronous triggering system of an electrical experimental data recording apparatus in embodiment 2;
fig. 2 is a schematic diagram of a synchronous trigger delay calibration and correction flow in embodiment 2;
FIG. 3 (a) is a timing chart before the delay calibration in example 2;
FIG. 3 (b) is a timing chart after the delay calibration in example 2.
Detailed Description
For a further understanding of the present invention, reference is made to the following detailed description taken in conjunction with the accompanying drawings and examples. It is to be understood that the examples are illustrative of the invention and not limiting.
Example 1
The embodiment provides a synchronous trigger system of electrical experiment data recording equipment, which comprises:
a trigger signal generator for generating pulses at intervals;
the delay correction module is used for recording the inherent trigger delays of different experimental devices into the trigger delays of other experimental devices, so that the devices with different inherent trigger delays can be triggered at the same time;
the trigger device is used for synchronously triggering;
the time delay calibration device is used for calibrating the inherent trigger time delay of different experimental equipment;
the trigger signal generator, the delay correction module and the trigger device are sequentially connected, and the delay calibration device is connected with the trigger signal generator.
The trigger generator generates a pulse immediately upon start-up and a pulse again after a time interval T0.
And the delay correction module delays for a period of time T1 after receiving the rising edge of the pulse and then outputs high level.
The time delay calibration device at least comprises: the device comprises a light source module and a signal module.
The time delay calibration device is started immediately after receiving the second pulse generated by the trigger signal generator.
The time delay calibration device is started immediately after the light source module and the signal module are started.
The start of the light source module can be recorded by a video data recording device, and the output change of the signal module can be recorded by an analog quantity and digital quantity data recording device.
The triggering device at least comprises: level trigger interface and mechanical switch trigger mechanism.
The level trigger interface can output a level signal meeting the requirements of the data recording equipment, and the mechanical switch trigger mechanism can adjust the switch depth.
The triggering device has different types according to different triggering modes of the experimental equipment.
Example 2
As shown in fig. 1, in order to further explain the functions and operations of the present embodiment, the present embodiment uses a data recording device commonly used in electrical experiments: the camera 51 and oscilloscope 52 are used as triggered devices, and are described as examples only, and any person skilled in the art will appreciate that the function of the present invention is not limited thereto.
The embodiment provides a synchronous triggering system of electrical experiment data recording equipment, and referring to fig. 1, the triggering system includes a triggering signal generator 1, a delay correction module, a triggering device, and a delay calibration device 4. The delay correction module comprises a first delay correction module 21 and a second delay correction module 22, and the triggering device comprises a first triggering device 31 and a second triggering device 32.
The trigger signal generator 1 has various starting modes, and can be started by rising and falling edges and also can be started by a switch.
Trigger generator 1 generates a single pulse D1 immediately after activation and a second pulse D2 immediately after time interval T0.
The interval time T0 can be set according to the requirements of the maximum inherent delay time Ts _ max of the actual synchronized equipment and the target experiment time Ta.
The interval time T0 is set to be greater than Ts _ max, and is generally less than 10% of the target experiment time Ta.
As shown in fig. 2, a synchronous trigger delay calibration and correction process is as follows:
a. setting a pulse interval T0 of a trigger signal generator;
b. starting a test and checking test data;
c. judging whether all the devices acquire a calibration signal mark, if so, carrying out the next step, and if not, returning to the step a;
d. calculating mark delay of each equipment signal;
e. and calculating and setting a parameter T1 of the delay correction module.
Through the delay calibration test, whether the interval time T0 is set reasonably can be checked. For example, after the delay calibration test is performed: opening video data, and if the light source module is in a starting state when a test video starts, setting the interval time T0 to be too short; if the starting time of the light source module is later, the interval time T0 is set to be overlarge. Opening waveform data, and if the pulse D2 is not collected, setting the interval time T0 to be too small; if the D2 appearance time is later, the interval time T0 is set to be excessively large.
The trigger signal generator 1 is connected to the first delay correction module 21 and the second delay correction module 22, respectively.
As shown in fig. 3 (a) and 3 (b), after the trigger signal sends out the pulse D1, the first delay correction module 21 and the second delay correction module 22 respectively output a high level after the delay time T1_1 and the delay time T1_ 2.
The first delay correction module 21 and the second delay correction module 22 can set: the delay times T1_1 and T1_2, and the output level amplitudes H _1 and H _2.
The first delay correction module 21 and the second delay correction module 22 are respectively connected to the first triggering device 31 and the second triggering device 32.
The first trigger device 31 and the second trigger device 32 are connected to the camera 51 and the oscilloscope 52, respectively.
After the first delay correction module 21 and the second delay correction module 22 output a high level, the first trigger device 31 and the second trigger device 32 start immediately to trigger the camera 51 and the oscilloscope 52.
As shown in fig. 3 (a) and 3 (b), the camera 51 has an inherent delay time Ts _51, and the oscilloscope 52 has an inherent delay time Ts _52.
As shown in fig. 3 (a) and 3 (b), the delay calibration device outputs a delay calibration signal mark immediately after receiving the pulse D2, and a delay calibration test is performed by the delay calibration device, so that in data collected by the camera 51 and the oscilloscope 52, the delay of the signal mark is m _51 and m _52, respectively, and if m _51 is restricted to m \52, the delay time T1_1 is set to m _52-m _51; if m _51> < m _52, the delay time T1_2 should be set to m _51-m _52.
According to the embodiment of the disclosure, under the condition that the inherent delay of each device is unknown, the delay calibration device is used for carrying out delay calibration test, and further the delay correction module is determined to set the delay, so that different data recording devices trigger and record data at the same moment, and the problem of data asynchronism caused by different inherent delays of each device is solved.
The present invention and its embodiments have been described above schematically, and the description is not intended to be limiting, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.
Claims (7)
1. A synchronous trigger system of electricity experiment data recording equipment is characterized in that: the method comprises the following steps:
a trigger signal generator for generating pulses at intervals;
the delay correction module is used for counting the inherent trigger delays of different experimental devices into the trigger delays of other experimental devices, so that the devices with different inherent trigger delays can be triggered at the same time;
the trigger device is used for synchronously triggering; the time delay calibration device is used for calibrating the inherent trigger time delay of different experimental equipment;
the trigger signal generator, the delay correction module and the trigger device are sequentially connected, and the delay calibration device is connected with the trigger signal generator;
the trigger signal generator immediately generates a primary pulse when being started, and generates a primary pulse again after a period of time interval T0;
the delay correction module delays for a period of time T1 after receiving the pulse rising edge and then outputs a high level;
the time delay calibration device is started immediately after receiving the second pulse generated by the trigger signal generator.
2. The electrical experiment data recording equipment synchronous triggering system as claimed in claim 1, wherein: the time delay calibration device at least comprises: the device comprises a light source module and a signal module.
3. The electrical experiment data recording equipment synchronous triggering system as claimed in claim 1, wherein: the time delay calibration device is started immediately after the light source module and the signal module are started.
4. The electrical experiment data recording equipment synchronous triggering system as claimed in claim 1, wherein: the start of the light source module can be recorded by a video data recording device, and the output change of the signal module can be recorded by an analog quantity and digital quantity data recording device.
5. The electrical experiment data recording equipment synchronous triggering system as claimed in claim 1, wherein: the triggering device at least comprises: level trigger interface and mechanical switch trigger mechanism.
6. The electrical experiment data recording equipment synchronous triggering system as claimed in claim 5, wherein: the level trigger interface can output a level signal meeting the requirements of the data recording equipment, and the mechanical switch trigger mechanism can adjust the switch depth.
7. The system for synchronously triggering electrical experiment data recording equipment according to claim 6, wherein: the triggering device has different types according to different triggering modes of the experimental equipment.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102111261A (en) * | 2011-01-13 | 2011-06-29 | 四川大学 | TDMOW serial bus-based distributed oscillographs synchronization method |
| CN203259133U (en) * | 2013-04-26 | 2013-10-30 | 华中科技大学 | Dynamic three dimensional measuring time sequence synchronous system |
| CN107277389A (en) * | 2017-08-09 | 2017-10-20 | 山东科技大学 | Digital Photogrammetric System polyphaser dynamic synchronization exposure circuit and method based on FPGA |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3763317A (en) * | 1970-04-01 | 1973-10-02 | Ampex | System for correcting time-base errors in a repetitive signal |
| US7240231B2 (en) * | 2002-09-30 | 2007-07-03 | National Instruments Corporation | System and method for synchronizing multiple instrumentation devices |
| CN111556224B (en) * | 2020-05-20 | 2022-08-05 | 武汉四维图新科技有限公司 | Multi-camera synchronous calibration method, device and system |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102111261A (en) * | 2011-01-13 | 2011-06-29 | 四川大学 | TDMOW serial bus-based distributed oscillographs synchronization method |
| CN203259133U (en) * | 2013-04-26 | 2013-10-30 | 华中科技大学 | Dynamic three dimensional measuring time sequence synchronous system |
| CN107277389A (en) * | 2017-08-09 | 2017-10-20 | 山东科技大学 | Digital Photogrammetric System polyphaser dynamic synchronization exposure circuit and method based on FPGA |
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