CN111175570B - Pulse discharge current recording device with trigger enabling function and fault identification method - Google Patents

Pulse discharge current recording device with trigger enabling function and fault identification method Download PDF

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CN111175570B
CN111175570B CN202010174608.1A CN202010174608A CN111175570B CN 111175570 B CN111175570 B CN 111175570B CN 202010174608 A CN202010174608 A CN 202010174608A CN 111175570 B CN111175570 B CN 111175570B
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trigger
pulse
discharge current
xenon lamp
current
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CN111175570A (en
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沈昊
苏东
陈德怀
张雄军
赖贵友
唐海波
郑奎兴
陈波
彭志涛
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Laser Fusion Research Center China Academy of Engineering Physics
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/44—Testing lamps
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Abstract

The invention discloses a discharge current recording device with trigger enabling and a fault identification method, which are used for collecting pulse current of a pulse xenon lamp power supply and judging faults and relate to the technical field of pulse power. The device comprises n paths of synchronous acquisition modules, a data processing module and a triggering communication module. Firstly, before a pulse xenon lamp power supply discharges, a triggering enabling signal and experimental parameters are transmitted to a data processing module through a communication module, set current characteristics are calculated, and the triggering enabling signal is released; then, an external trigger signal is sent to a pulse xenon lamp power supply to start discharging, and meanwhile, the external trigger signal starts data acquisition through a trigger communication module; and finally, the data processing module carries out fault judgment on the collected discharge data according to the set current characteristics and sends the result to the upper computer. The method can avoid the risk of false triggering caused by electromagnetic interference, realizes automatic interpretation of the discharge current based on the discharge current calculation and the characteristic extraction of the non-linear characteristic of the xenon lamp, and can greatly improve the efficiency of discharge current fault identification.

Description

Pulse discharge current recording device with trigger enabling function and fault identification method
Technical Field
The invention relates to the technical field of pulse power, in particular to a discharge current recording device with trigger enabling and a fault identification method, which can be applied to acquisition of multi-loop discharge current of a pulse xenon lamp power supply and identification of discharge current faults of each path.
Background
A pulsed xenon lamp is a device that converts electrical energy into radiation energy by means of a pulsed discharge, the energy stored on a capacitor can be discharged in the form of a gas discharge through a xenon lamp tube in a very short time, while a high-temperature plasma is established in the lamp and high-brightness radiation is produced. The laser has the advantages of strong load capacity, good laser light speed quality, high pumping efficiency and the like, and is widely applied to the pumping source of the solid laser.
The xenon lamp load of the pulse xenon lamp power supply is in a multi-loop parallel connection mode, in order to judge whether each path of load discharge succeeds or not, firstly, the discharge current needs to be collected through a wave recording device, then, collected data are processed, and finally, the processed data are judged. The technical scheme of the traditional discharge current wave recording device is as follows: the recording device is directly triggered by the synchronous signal to collect and process the discharge current. In the prior art, there are two schemes for identifying discharge faults: firstly, the artificial interpretation is carried out; and secondly, storing the normal discharge current data into the device in advance, and then comparing and identifying the data with experimental data. The device and the fault identification method have the following defects: firstly, the wave recording is carried out by directly triggering the device through a synchronous signal, so that the risk of false triggering in a non-discharge process caused by electromagnetic interference exists; secondly, the method of manually interpreting the discharge current data has the defect of low recognition efficiency; thirdly, the method of storing the normal discharge data in advance has the defect of poor portability.
In summary, the various technical approaches proposed in the prior art all have obvious disadvantages, and a new wave recording method and a new discharge fault identification method need to be developed.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the pulse discharge current recording device with the trigger enable and the fault identification method.
The technical scheme adopted by the invention is as follows:
a pulse discharge current recorder with trigger enable is used for collecting pulse current of a pulse xenon lamp power supply and judging faults, and comprises n paths of synchronous collection modules (T1-Tn), a data processing module and a trigger communication module which are sequentially and electrically connected;
the synchronous acquisition module (T1-Tn) is used for acquiring pulse current of a pulse xenon lamp power supply, the data processing module is used for processing received current acquisition data, trigger signals and communication data, and the trigger communication module is used for receiving and sending the trigger signals and/or the communication data;
before the pulse xenon lamp power supply starts to discharge, the data processing module receives the experimental parameter group through the trigger communication module and calculates the discharge current waveform, determines the corresponding waveform characteristic and releases the trigger enabling block;
an external trigger signal (P3) is converted into an electric signal through a trigger communication module and is sent to a data processing module and a pulse xenon lamp power supply, and data acquisition is started; and the data processing module performs fault judgment on the acquired data according to the calculated discharge current waveform characteristics and sends a fault judgment result to the upper computer.
Furthermore, the synchronous acquisition module consists of a Rogowski coil (R1-Rn), a current sensor (CT1-CTn), an n-path analog-to-digital conversion chip AD and a digital isolation chip I1; the data processing module is formed by electrically connecting an FPGA unit F1 and a main control circuit M1; the trigger communication module is composed of a trigger driving circuit T3 and a communication circuit T2.
Furthermore, a Rogowski coil (R1-Rn) in each path of synchronous acquisition module is sequentially connected with a current sensor (CT1-CTn), an n-path analog-to-digital conversion chip AD and a digital isolation chip I1, and the Rogowski coil (R1-Rn) is also connected with a pulse xenon lamp power supply; after the xenon lamp enters the acquisition working mode, each path of the synchronous acquisition module respectively and independently acquires the pulse current of the pulse xenon lamp power supply and transmits the acquisition result to the data processing module in a communication manner.
Further, the master control circuit M1 in the data processing module is connected with the digital isolation chip I1 through the FPGA unit F1.
Further, the trigger communication module is composed of a trigger driving circuit T3 and a communication circuit T2; the communication circuit T2 is electrically connected with the master control circuit M1 and is used for receiving the trigger enable signal and the experiment parameter group and transmitting the trigger enable signal and the experiment parameter group to the FPGA unit F1 through the master control circuit M1; the trigger driving circuit T3 is connected with the FPGA unit F1 and the pulse xenon lamp power supply at the same time and used for receiving an external trigger signal and sending the external trigger signal to the FPGA unit F1 and the pulse xenon lamp power supply.
On the other hand, the invention also provides a fault identification method based on the pulse discharge current recorder, wherein the pulse discharge current recorder is any one of the pulse discharge current recorders, and the fault identification method comprises the following steps:
s01, initializing the device, after being powered on, the upper computer sends a trigger blocking signal P1 to the FPGA unit F1 through the communication circuit T2 and the main control circuit M1, and after detecting the trigger blocking signal P1, the FPGA unit F1 closes the trigger enable;
s02, the upper computer sends the current experimental parameter group to the data processing module, and the data processing module calculates and determines the corresponding discharge current waveform characteristics according to the current experimental parameter group;
s03, after the set discharge current waveform characteristics are calculated, the upper computer sends a trigger enabling signal P2 to the FPGA unit F1 through the communication circuit T2 and the main control circuit M1, and the FPGA unit F1 starts trigger enabling after detecting the signal P2;
and S04, sending the external trigger signal P3 through the trigger module T3 and triggering the pulse xenon lamp power supply, converting the external trigger signal P3 into an electric signal through the trigger module T3 and sending the electric signal to the data processing module, and starting data acquisition.
And S05, the data processing module carries out fault judgment on the collected data according to the set discharge current waveform characteristics and sends the fault judgment result to the upper computer.
Further, the current experimental parameter set comprises a power supply energy storage capacitance value C, a power supply inductance L, a power supply resistance R, a xenon lamp inner diameter d, a xenon lamp length L and a xenon lamp pressure p.
Further, the main control circuit M1 in the data processing module calculates and determines the corresponding discharge current waveform characteristics according to the current experimental parameter group, and specifically includes the following steps:
s201, calculating a xenon lamp constant K through the formula (1)0：
Figure BDA0002410357430000031
S201, performing m iterations according to equation (2), and calculating a discharge current i and a capacitor voltage u:
Figure BDA0002410357430000032
s203, extracting the characteristics of the set discharge current, and calculating the set discharge current peak value I through the formulas (3) and (4) respectivelys_pkAnd setting a discharge current pulse width Ts_deta：
Is_pk＝Max{i1...in} (3)
Figure BDA0002410357430000033
Further, in step S04, the step of converting the external trigger signal P3 into an electrical signal through the trigger module T3 and sending the electrical signal to the data processing module, and the starting of data acquisition specifically includes:
s401, after receiving an external trigger signal P3, an FPGA unit F1 of the data processing module selects one or more corresponding paths in a synchronous acquisition module T1-Tn through a chip selection signal to acquire pulse current of a pulse xenon lamp power supply;
s402, the synchronous acquisition module sends the acquired one or more paths of pulse current data to the FPGA unit F1 in parallel for processing, and the main control circuit M1 reads the data in the FPGA unit F1 in a serial mode.
Further, the step S05 specifically includes:
s501, setting the recording sampling point as k, the main control circuit M1 calculates the current peak value characteristic I of the actual discharge current through the formulas (3) and (4)e_pk1And the pulse width characteristic Te_deta1；
S502, the current peak value characteristic I of the actual discharge current is obtainede_pk1And the pulse width characteristic Te_deta1And setting the peak characteristic I of the discharge currente_pkAnd setting the pulse width characteristic Te_detaComparing in sequence, when the errors of the two meet a certain condition, considering that the discharge is successful, otherwise, considering that the discharge is failed;
and S503, finally, sending the result of fault recognition of the discharging current by the main control circuit M1, namely discharging success/discharging fault, to the upper computer through the communication module T2.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the pulse discharge current wave recording device with the trigger enable adopts a trigger enable scheme based on the FPGA, and can avoid the risk of false trigger caused by electromagnetic interference compared with the traditional discharge current wave recording device;
2. the fault identification method adopted by the invention adopts discharge current calculation and characteristic extraction based on the non-linear characteristic of the xenon lamp and automatically judges the discharge current, so that the efficiency of discharge current fault identification can be greatly improved.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural diagram of a discharge current recorder with trigger enable according to an embodiment of the present invention.
Fig. 2 is a flowchart of a fault identification method based on a pulse discharge current recording device according to an embodiment of the present invention.
FIG. 3 is a schematic diagram illustrating discharge current waveform characteristics according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of a result of determining successful discharge according to an embodiment of the invention.
Fig. 5 is a schematic diagram of determining a discharge fault according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the following description of the technical solutions of the present invention with reference to the accompanying drawings of the present invention is made clearly and completely, and other similar embodiments obtained by a person of ordinary skill in the art without any creative effort based on the embodiments in the present application shall fall within the protection scope of the present application.
Example 1
A pulse discharge current recorder with trigger enable is used for collecting pulse current of a pulse xenon lamp power supply and judging faults, and comprises a plurality of synchronous collecting modules T1-Tn, a data processing module and a trigger communication module which are sequentially and electrically connected as shown in figure 1.
The synchronous acquisition module T1-Tn is used for acquiring pulse current of a pulse xenon lamp power supply and consists of a Rogowski coil R1-Rn, a current sensor CT1-CTn, an n-path analog-to-digital conversion chip AD and a digital isolation chip I1. Taking the first path of synchronous acquisition module T1 as an example, in the path of module, the rogowski coil R1 is sequentially connected with the current sensor CT1, the n paths of analog-to-digital conversion chips and the digital isolation chip I1, and the rogowski coil R1 is also connected with the power supply of the pulse xenon lamp; and the corresponding current sensor in the synchronous acquisition module of any other branch circuit is connected to the n analog-to-digital conversion chips through the Rogowski coil. After the working mode is started, each path of T1-Tn of the synchronous acquisition module independently acquires the pulse current of the pulse xenon lamp power supply and transmits the acquired result to the data processing module in a communication mode.
In one embodiment, n is any integer value from 1 to 8, and n may also be set according to the actual application requirement of the circuit device.
In one embodiment, the pulse discharge current recording device is provided with a synchronous acquisition module, and the module can respectively acquire n paths of current through n paths of T1-Tn. In another embodiment, the pulse discharge current recorder may further include a plurality of synchronous acquisition modules, which is not limited in the present invention.
The data processing module is used for processing the received current acquisition data, the trigger signal and the communication data, and is formed by electrically connecting an FPGA unit F1 and a main control circuit M1. The master control circuit M1 is in communication connection with the digital isolation chip I1 through the FPGA unit F1.
The trigger communication module is used for receiving and sending trigger signals and/or communication data and consists of a trigger driving circuit T3 and a communication circuit T2; the communication circuit T2 is electrically connected with the master control circuit M1 and is used for receiving the trigger enable signal and the experiment parameter group and transmitting the trigger enable signal and the experiment parameter group to the FPGA unit F1 through the master control circuit M1; the trigger driving circuit T3 is connected with the FPGA unit F1 and the pulse xenon lamp power supply at the same time, and is used for receiving an external trigger signal and sending the external trigger signal to the FPGA unit F1 and the pulse xenon lamp power supply.
The experimental parameter group refers to parameter values of circuit elements in the current circuit.
Before the pulse xenon lamp power supply starts to discharge, the data processing module receives experimental parameters through the trigger communication module and calculates a discharge current waveform, determines corresponding waveform characteristics and releases the trigger enabling block;
the external trigger signal P3 is converted into an electric signal through the trigger communication module and is sent to the data processing module and the pulse xenon lamp power supply, and data acquisition is started; and the data processing module performs fault judgment on the acquired data according to the calculated discharge current waveform characteristics and sends a fault judgment result to the upper computer, so that current acquisition wave recording and fault identification are realized.
Example 2
The present embodiment provides a fault identification method based on a pulse discharge current recorder, and in the present embodiment, the fault identification method is performed based on the pulse discharge current recorder with trigger enable in any of the foregoing embodiments. As shown in fig. 2, the method includes:
s01, initializing the device, after being powered on, the upper computer sends a trigger blocking signal P1 to the FPGA unit F1 through the communication circuit T2 and the main control circuit M1, and after detecting the trigger blocking signal P1, the FPGA unit F1 closes the trigger enable;
s02, the upper computer sends the current experimental parameter group to the data processing module, and the data processing module calculates and determines the corresponding discharge current waveform characteristics according to the current experimental parameter group;
in one embodiment, the current experimental parameter set includes a power storage capacitance value C, a power inductance L, a power resistance R, a xenon lamp inner diameter d, a xenon lamp length L, and a xenon lamp pressure p.
The main control circuit M1 in the data processing module may calculate and determine the corresponding discharge current waveform characteristics according to the current experimental parameter group, and specifically includes the following steps:
s201, calculating a xenon lamp constant K through the formula (1)0：
Figure BDA0002410357430000061
S201, performing m iterations according to equation (2), and calculating a discharge current i and a capacitor voltage u:
Figure BDA0002410357430000062
s203, extracting the characteristics of the set discharge current I, and calculating the set discharge current peak value I through the formulas (3) and (4) respectivelys_pkAnd setting a discharge current pulse width Ts_deta：
Is_pk＝Max{i1...in} (3)
Figure BDA0002410357430000063
FIG. 3 shows the set peak discharge current value I calculated in this embodiments_pkAnd setting a discharge current pulse width Ts_detaSchematic representation of (a).
S03, after the set discharge current waveform characteristics are calculated, the upper computer sends a trigger enabling signal P2 to the FPGA unit F1 through the communication circuit T2 and the main control circuit M1, and the FPGA unit F1 starts trigger enabling after detecting the signal P2 and releases the trigger enabling blocking;
and S04, sending the external trigger signal P3 through the trigger module T3 and triggering the pulse xenon lamp power supply, converting the external trigger signal P3 into an electric signal through the trigger module T3 and sending the electric signal to the data processing module, and starting data acquisition.
The converting the external trigger signal P3 into an electric signal through the trigger module T3 and sending the electric signal to the data processing module, and the starting of data acquisition specifically includes:
s401, after receiving an external trigger signal P3, an FPGA unit F1 of the data processing module selects one or more corresponding paths in a synchronous acquisition module T1-Tn through a chip selection signal to acquire pulse current of a pulse xenon lamp power supply;
s402, the synchronous acquisition module sends the acquired one-way or multi-way pulse current data to the FPGA unit F1 in parallel, and the main control circuit M1 reads the current data cached in the FPGA unit F1 in a serial mode.
And S05, the data processing module carries out fault judgment on the collected data according to the calculated discharge current waveform characteristics and sends the fault judgment result to the upper computer.
The step S05 specifically includes:
s501, setting the recording sampling point as k, the main control circuit M1 can calculate the current peak value characteristic I of the actual discharge current by the formulas (3) and (4)e_pk1And the pulse width characteristic Te_deta1；
S502, the current peak value characteristic I of the actual discharge current is obtainede_pk1And the pulse width characteristic Te_deta1And setting the peak characteristic I of the discharge currente_pkAnd setting the pulse width characteristic Te_detaAnd sequentially comparing, and when the errors of the two meet a certain condition, considering that the discharge is successful, otherwise, considering that the discharge is failed.
For example, it is first determined whether | I is satisfieds_pk1-Ie_pk|<Iset，IsetIs a preset discharge current peak threshold; secondly, whether the | T is satisfied is judgeds_deta1-Te_deta|<Tset，TsetIs a preset discharge current pulse width threshold. Namely, when the discharging current, the difference value of the peak value and the difference value of the pulse width are smaller than the preset threshold value, the discharging is considered to be successful.
And S503, finally, sending the result of fault recognition of the discharging current (namely discharging success/discharging fault) by the main control circuit M1 to the upper computer through the communication module T2.
As shown in fig. 4-5, it can be seen from fig. 4 that the numerical waveforms of the current discharge experimental data and the set calculation data are substantially consistent, so that the success of the discharge can be judged; in fig. 5, it can be seen that the difference between the current discharge experimental data and the set numerical value waveform of the calculation data is large, and the peak value and the pulse width of the current discharge experimental data and the set numerical value waveform of the calculation data are both greater than the preset threshold condition, so that it can be determined that the current discharge is a fault.
In summary, the present invention provides a pulse discharge current recorder with trigger enable and a fault identification method based on the same, on one hand, a trigger enable scheme based on an FPGA is adopted, and compared with a conventional discharge current recorder, the present invention can avoid a risk of false trigger caused by electromagnetic interference; on the other hand, the discharge current is calculated and extracted according to the non-linear characteristic of the xenon lamp, and the discharge current is automatically interpreted, so that the efficiency of discharge current fault identification can be greatly improved.
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification (including any accompanying claims, abstract) may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.

Claims (10)

1. A pulse discharge current recorder with trigger enable is used for collecting pulse current of a pulse xenon lamp power supply and judging faults, and is characterized by comprising n paths of synchronous collection modules (T1-Tn), a data processing module and a trigger communication module which are sequentially and electrically connected;
the synchronous acquisition module (T1-Tn) is used for acquiring pulse current of a pulse xenon lamp power supply, the data processing module is used for processing received current acquisition data, trigger signals and communication data, and the trigger communication module is used for receiving and sending the trigger signals and/or the communication data;
before the pulse xenon lamp power supply starts to discharge, the data processing module receives the experimental parameter group through the trigger communication module and calculates the discharge current waveform, determines the corresponding waveform characteristic and releases the trigger enabling block;
an external trigger signal (P3) is converted into an electric signal through a trigger communication module and is sent to a data processing module and a pulse xenon lamp power supply, and data acquisition is started; and the data processing module performs fault judgment on the acquired data according to the calculated discharge current waveform characteristics and sends a fault judgment result to the upper computer.
2. The pulse discharge current recorder with trigger enabling function as claimed in claim 1, wherein the synchronous acquisition module is composed of Rogowski coil (R1-Rn), current sensor (CT1-CTn), n analog-to-digital conversion chips (AD) and digital isolation chip I1; the data processing module is formed by electrically connecting an FPGA unit F1 and a main control circuit M1; the trigger communication module is composed of a trigger driving circuit T3 and a communication circuit T2.
3. The pulse discharge current recorder with trigger enabling function as claimed in claim 2, wherein the rogowski coil (R1-Rn) in each path of synchronous acquisition module is connected with the current sensor (CT1-CTn), the n analog-to-digital conversion chips AD, and the digital isolation chip I1 in turn, and the rogowski coil (R1-Rn) is also connected with the pulse xenon lamp power supply; after the xenon lamp enters the acquisition working mode, each path of the synchronous acquisition module respectively and independently acquires the pulse current of the pulse xenon lamp power supply and transmits the acquisition result to the data processing module in a communication manner.
4. The pulse discharge current recorder with trigger enable according to claim 3, wherein the master control circuit M1 in the data processing module is connected with the digital isolation chip I1 through the FPGA unit F1.
5. The pulse discharge current recorder with trigger enable according to claim 4, wherein said trigger communication module is composed of a trigger driving circuit T3 and a communication circuit T2; the communication circuit T2 is electrically connected with the master control circuit M1 and is used for receiving the trigger enable signal and the experiment parameter group and transmitting the trigger enable signal and the experiment parameter group to the FPGA unit F1 through the master control circuit M1; the trigger driving circuit T3 is connected with the FPGA unit F1 and the pulse xenon lamp power supply at the same time and used for receiving an external trigger signal and sending the external trigger signal to the FPGA unit F1 and the pulse xenon lamp power supply.
6. A fault identification method based on a pulse discharge current recorder, wherein the pulse discharge current recorder is the pulse discharge current recorder of any one of claims 1 to 5, and the fault identification method comprises the following steps:
s01, initializing the device, after being powered on, the upper computer sends a trigger blocking signal P1 to the FPGA unit F1 through the communication circuit T2 and the main control circuit M1, and after detecting the trigger blocking signal P1, the FPGA unit F1 closes the trigger enable;
s02, the upper computer sends the current experimental parameter group to the data processing module, and the data processing module calculates and determines the corresponding discharge current waveform characteristics according to the current experimental parameter group;
s03, after the set discharge current waveform characteristics are calculated, the upper computer sends a trigger enabling signal P2 to the FPGA unit F1 through the communication circuit T2 and the main control circuit M1, and the FPGA unit F1 starts trigger enabling after detecting the signal P2;
s04, an external trigger signal P3 is sent and triggers the pulse xenon lamp power supply through the trigger module T3, and meanwhile, the external trigger signal P3 is converted into an electric signal through the trigger module T3 and sent to the data processing module, and data acquisition is started;
and S05, the data processing module carries out fault judgment on the collected data according to the set discharge current waveform characteristics and sends the fault judgment result to the upper computer.
7. The fault identification method based on the pulse discharge current recording device according to claim 6, wherein the current experimental parameter set includes a power storage capacitance value C, a power inductance L, a power resistance R, a xenon lamp inner diameter d, a xenon lamp length L and a xenon lamp pressure p.
8. The method according to claim 7, wherein the main control circuit M1 in the data processing module calculates and determines the corresponding discharge current waveform characteristics according to the current experimental parameter set, and specifically comprises the following steps:
s201, calculating a xenon lamp constant K through the formula (1)0：
Figure FDA0003448745120000021
S201, performing m iterations according to equation (2), and calculating a discharge current i and a capacitor voltage u:
Figure FDA0003448745120000022
s203, extracting the characteristics of the set discharge current, and calculating the set discharge current peak value I through the formulas (3) and (4) respectivelys_pkAnd setting a discharge current pulse width Ts_deta：
Is_pk＝Max{i1...in} (3)
Figure FDA0003448745120000023
Wherein,
Figure FDA0003448745120000024
means setting the discharge current to be a later time at one tenth of the peak value;
Figure FDA0003448745120000025
it is referred to the time before the discharge current is set to one tenth of the peak value.
9. The method as claimed in claim 8, wherein the step S04 of converting the external trigger signal P3 into an electrical signal through the trigger module T3 and sending the electrical signal to the data processing module, and the step of starting data acquisition includes:
s401, after receiving an external trigger signal P3, an FPGA unit F1 of the data processing module selects one or more corresponding paths in a synchronous acquisition module T1-Tn through a chip selection signal to acquire pulse current of a pulse xenon lamp power supply;
s402, the synchronous acquisition module sends the acquired one or more paths of pulse current data to the FPGA unit F1 in parallel for processing, and the main control circuit M1 reads the data in the FPGA unit F1 in a serial mode.
10. The method for identifying the fault based on the pulse discharge current recorder as claimed in claim 9, wherein the step S05 specifically includes:
s501, setting the recording sampling point as k, the main control circuit M1 calculates the current peak value characteristic I of the actual discharge current through the formulas (3) and (4)e_pk1And the pulse width characteristic Te_deta1；
S502, the current peak value characteristic I of the actual discharge current is obtainede_pk1And the pulse width characteristic Te_deta1And setting the peak characteristic I of the discharge currente_pkAnd setting the pulse width characteristic Te_detaComparing in sequence, when the errors of the two meet a certain condition, considering that the discharge is successful, otherwise, considering that the discharge is failed;
and S503, finally, sending the result of fault recognition of the discharging current by the main control circuit M1, namely discharging success/discharging fault, to the upper computer through the communication module T2.
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