CN107515340B - Detection device and detection method for starting box - Google Patents
Detection device and detection method for starting box Download PDFInfo
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- CN107515340B CN107515340B CN201710785334.8A CN201710785334A CN107515340B CN 107515340 B CN107515340 B CN 107515340B CN 201710785334 A CN201710785334 A CN 201710785334A CN 107515340 B CN107515340 B CN 107515340B
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Abstract
The invention discloses a detection device and a detection method for a starting box, wherein the detection device comprises: the acquisition and transmission module is used for acquiring waveform signals of the corresponding output port of the starting box at each detection stage, preprocessing the acquired waveform signals and then transmitting the preprocessed waveform signals; the calculating module is used for receiving the signals sent by the collecting and sending module, calculating the waveform level jump time of the received signals to obtain a time value and calculating an error value between the time value and a standard value; the judging module is used for judging whether the waveform signal is the same as the standard waveform and whether the error value is within a preset range, and if so, judging that the starting box is normal; if not, judging that the starting box is abnormal. The invention can quantitatively detect the performance and the function of the starting box according to the designed test case and the solidified detection flow, improves the consistency of the detection result, avoids the error considered by detection personnel, meets the precision requirement and has high real-time property.
Description
Technical Field
The invention relates to the field of detection of electronic accessories of gas turbines, in particular to a detection device and a detection method for a starting box.
Background
The starting box for a certain type of gas turbine consists of a time relay combination circuit, a box body, a bottom plate and a cover plate. The time relay is combined with each other to output control time sequence, and the hardware comprises a starting circuit, a self-holding circuit and an ignition circuit.
It is often necessary to detect whether the starter box meets the relevant standards by a series of detection means for the performance and function of the starter box. Traditional starting box detection mainly adopts the device that instruments and equipment such as oscilloscope, DC power supply built and form, through the mode of measurement personnel manual operation, needs the manual work to operate and time, and both time-consuming and hard, the precision is very low moreover, causes human error easily.
Disclosure of Invention
The invention provides a detection device and a detection method for a starting box, and aims to solve the technical problems of time and labor waste and low precision of manual detection.
The technical scheme adopted by the invention is as follows:
a detection device of a starting box, comprising: the acquisition and transmission module is used for acquiring waveform signals of the corresponding output port of the starting box at each detection stage, preprocessing the acquired waveform signals and then transmitting the preprocessed waveform signals; the calculating module is used for receiving the signals sent by the collecting and sending module, calculating the waveform level jump time of the received signals to obtain a time value and calculating an error value between the time value and a standard value; the judging module is used for judging whether the waveform signal is the same as the standard waveform and whether the error value is within a preset range, and if so, judging that the starting box is normal; if not, judging that the starting box is abnormal.
Further, the detection device of the starting box further comprises: the database module is used for storing the time value and the error value calculated by the calculation module and the judgment result obtained by the judgment module; and the display module is used for visually displaying the data and the results stored in the database module.
Further, the detection device of the starting box further comprises: and the report generation module is used for reading the data and the results stored in the database module and generating a detection report so as to realize the query and printing of the judgment result.
As an optional implementation manner, the acquisition and transmission module comprises an a/D conditioning submodule and a D/a conditioning submodule, and the a/D conditioning submodule is used for isolating and filtering a voltage signal output by the starting box; and the D/A conditioning submodule is used for isolating and amplifying the voltage signal output by the detection device.
As another optional implementation, the collecting and sending module includes a DI conditioning submodule and a DO conditioning submodule, the DI conditioning submodule is used for dividing and isolating the switching signal output by the starting box, and the DO conditioning submodule is used for isolating and amplifying the current of the switching signal output by the detecting device.
According to another aspect of the present invention, there is also provided a detection method of a starting box, including the steps of:
collecting waveform signals of corresponding output ports of the starting box at each detection stage, preprocessing the collected waveform signals and then sending the preprocessed waveform signals;
calculating the waveform level jump time of the preprocessed signal to obtain a time value, and calculating an error value between the time value and a standard value;
judging whether the waveform signal is the same as the standard waveform and whether the error value is in a preset range, if so, judging that the starting box is normal; if not, judging that the starting box is abnormal.
Further, the detection method of the starting box of the present invention further comprises: storing the calculated time value, the calculated error value and a judgment result obtained by judgment into a database; and visually displaying the stored data and results.
Further, the detection method of the starting box of the present invention further comprises: and displaying the waveform signal output by the starting box on a display interface.
Further, the detection method of the starting box of the present invention further comprises: and reading the data and the results stored in the database, generating a detection report and realizing the query and printing of the judgment result.
Furthermore, the detection method of the starting box is sequentially carried out according to four detection stages, namely an ignition operation detection stage, a non-ignition detection stage, a simulation middle stage detection stage and a detection stage after parking.
Compared with the manual detection device and method which are built by instruments such as an oscilloscope, a direct-current power supply and the like, the detection device and the detection method of the starting box provided by the invention have the advantages that the detection parameters of the starting box are automatically acquired, processed and calculated by a computer, the performance and the function of the starting box can be quantitatively detected according to the designed test case and the solidified detection flow, the consistency of the detection result is improved, the detection personnel can avoid considering errors, the digital automatic detection of the starting box for the gas turbine is realized, the precision of the system meets the requirement, the real-time performance is high, and the dynamic performance of the system is excellent.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a block diagram showing a detecting device of a starting box according to a preferred embodiment of the present invention;
FIG. 2 is a hardware block diagram of a detection device of the starting box of the preferred embodiment of the present invention;
FIG. 3 is a flow chart of a method of detection of the starting box of the preferred embodiment of the present invention;
FIG. 4 is a schematic representation of four stages of the detection method of the starter box of the present invention;
FIG. 5 is a waveform diagram of the ports during the detection phase of ignition operation;
FIG. 6 is a waveform diagram of the ports during a misfire detection period;
fig. 7 is a waveform diagram of each port in the post-parking detection phase.
The reference numbers illustrate:
100. a collecting and sending module; 200. a calculation module; 300. a judgment module; 400. a database module; 500. a display module; 600. a report generation module; 700. and a system resource management module.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1, a preferred embodiment of the present invention provides a detection apparatus of a starting box, including: the acquisition and transmission module 100 is used for acquiring waveform signals of corresponding output ports of the starting box at each detection stage, preprocessing the acquired waveform signals and then transmitting the preprocessed waveform signals; a calculating module 200, configured to receive the signal sent by the collecting and sending module 100, calculate a time value according to the waveform level jump time of the received signal, and calculate an error value between the time value and a standard value; the judging module 300 is used for judging whether the waveform signal is the same as the standard waveform and whether the error value is within a preset range, and if so, judging that the starting box is normal; if not, judging that the starting box is abnormal.
As an optional implementation, the acquisition and transmission module 100 includes an a/D conditioning sub-module and a D/a conditioning sub-module, and is used for a/D acquisition and D/a transmission. The A/D conditioning submodule is used for preprocessing a voltage signal output by the starting box: isolation and filtering are included; and the D/A conditioning submodule is used for isolating and amplifying the voltage signal output by the detection device.
As another optional implementation, the collecting and sending module 100 includes a DI conditioning submodule and a DO conditioning submodule, the DI conditioning submodule is configured to perform voltage division and isolation preprocessing on a switching signal output by the starting box, and the DO conditioning submodule is configured to perform isolation and current amplification on the switching signal output by the detection device.
Further, the detection device of the starting box further comprises: the database module 400 is used for storing the time value and the error value calculated by the calculation module 200 and the judgment result obtained by the judgment module 300; and the display module 500 is used for visually displaying the data and the results stored in the database module 400. When an anomaly is detected, the display module 500 displays, marks the detection data and results of the anomaly in a significant manner.
The database module 400 of the present invention is also used to store the information of the testing personnel, the testing information, the testing environment parameters, the testing data, the information of the starting box, the testing report and the testing type.
Further, the detection device of the starting box further comprises: and a report generation module 600, configured to read the data and the result stored in the database module 400, generate a detection report, and implement query and printing of the determination result.
The detection device of the starting box further comprises a system resource management module 700, which is used for system resource configuration, system hardware self-check and test information creation.
Referring to fig. 2, the detection device of the starting box of the present invention includes hardware components: an adapter directly connected to the boot, a computer connected to the adapter, and a display.
A basic operation platform is built by a computer (such as an industrial control computer, a compactRIO platform and the like) and a corresponding interface card (such as a PCI bus, the interface card of the compactRIO and the like), a special power supply conversion module is designed to realize power supply of various circuits, a special signal conditioning box is designed to realize interface matching of the interface card and a starting box, and detection software is designed by adopting technologies such as a virtual instrument, a database (such as SQL SERVER 2000) and the like to reasonably schedule hardware resources so as to realize functions of automatic detection, data storage, playback, report generation and the like.
The industrial control computer system consists of three parts, namely a case, a mainboard and an analog input and output board card. As an example, the 7-channel analog quantity is output by adopting an analog quantity output card PCI-1724, and the 24-channel analog quantity is input by adopting an analog quantity input card PCI-1713. The drive circuit is designed to control the action of the time relay.
The compactRIO system (reconfigurable embedded measurement and control system) consists of a controller (embedded with a PowerPC microprocessor and an FPGA chip), a case (embedded with the FPGA chip) and an analog input/output module (a notebook computer or an industrial personal computer is required to be used as an upper computer for man-machine interaction and is connected with the compactRIO system through a network cable in a control mode). As an example, a CompactRIO controller NI cRIO 9039 or NI cRIO 9025 is adopted to run a VxWorks operating system, and a double network port, a USB port and an RS232 serial port are provided; a 16-channel 16-bit analog output module NI 9264 and an 8-channel 12-bit 0-5V analog input/output module NI 9381 are adopted; a 32-channel bi-directional digital input output module NI 9403 may also be employed. Aiming at the analog quantity input and output module or the digital quantity input and output module, a corresponding driving circuit is designed to control the action of the time relay.
The man-machine interaction interface is used for realizing test mode control, starting box parameter display, starting box state indication and starting box parameter configuration.
And performing corresponding signal conditioning on each functional module of the test board, wherein the conditioned signals can be finally and directly acquired by each functional module of the test board or a tested starting box, and the signal conditioning comprises analog quantity input and output and the like.
Specifically, in the preferred embodiment, the adapter is composed of a chassis, a back plate, a fixing chute, a conditioning module, a connector and a cable, and adopts a frame structure and a modular installation structure.
The power supply conversion module conditions the 16V-30V direct current supply voltage and outputs stable-22V, +/-15V and +5V power supplies to supply power to each conditioning circuit.
The state indicator lamp realizes the display of the output state of the switching value, and is convenient for testing and calibration.
The A/D conditioning module isolates and filters the voltage signal output by the starting box. The D/A conditioning module carries out isolation amplification on the-5V- +5V signals output by the detection device.
The DI conditioning module divides and isolates the switch signal output by the starting box. And the DO conditioning module is used for isolating and amplifying the current of the switching signal output by the detection device.
The adapter cable is divided into a board card cable of the computer and the adapter, an internal cable of the adapter, and an aerial plug cable of the adapter and the starting box. EMC shielding requirements are considered in the design and assembly of the cable, a common signal wire adopts a twisted pair shielding wire, and a shielding layer is reliably grounded.
The detection device of the starting box can quantitatively detect the performance and the function of the starting box according to the designed test case and the solidified detection flow, and has the functions of signal self-checking, detection process and parameter overall process monitoring. After the detection is finished, the detection personnel, the detection information, the detection environment parameters, the test types and the detection results can be stored in the database according to the regulations, the detection report forms can be automatically generated and printed, and the detection record/report can be checked back.
According to another aspect of the present invention, there is also provided a detection method of a starting box, referring to fig. 3, the detection method including the steps of:
step S100, collecting waveform signals of corresponding output ports of the starting box at each detection stage, preprocessing the collected waveform signals and then sending the preprocessed waveform signals;
step S200, calculating the waveform level jump time of the preprocessed signal to obtain a time value, and calculating an error value between the time value and a standard value;
step S300, judging whether the waveform signal is the same as the standard waveform and whether the error value is in a preset range, if so, judging that the starting box is normal; if not, judging that the starting box is abnormal.
Further, the detection method of the starting box of the present invention further comprises:
step S400, storing the calculated time value, the calculated error value and a judgment result obtained by judgment into a database;
and step S500, visually displaying the stored data and results.
Further, the detection method of the starting box of the present invention further comprises: and step S600, displaying the waveform signal output by the starting box on a display interface.
Further, the detection method of the starting box of the present invention further comprises: and step S700, reading the data and the results stored in the database, generating a detection report, and inquiring and printing the judgment result.
Specifically, as shown in fig. 4, the detection method of the present invention is performed sequentially according to four detection stages, namely, an ignition operation detection stage, a non-ignition detection stage, a simulation middle stage detection stage, and a detection stage after parking, and mainly collects, calculates, and judges a waveform level jump time of an output port of the starting box.
The specific detection process of the detection method of the present invention is given below as follows:
the first stage, the ignition operation detection stage: loading a +28V power supply on a relevant pin of the detection device, and adding a waveform S (+28V power supply at the S end of the starting box, wherein the high level duration time is 2S +/-1.5S, and the suggested time is 1S +/-0.1S); collecting the port waveform of an output port A, B, C, D, E, F, G, H, I of the starting box; calculating the waveform level jump time to obtain a time value and calculating an error value between the time value and a standard value; displaying the waveform on the main interface, and simultaneously displaying the calculated time value on a control corresponding to the waveform; when the waveform of each output port detected by the detection device is as shown in the standard waveform in fig. 5 and the error value is within the range of Ts ± 0.1s, the start box is determined to be normal.
Second stage, misfire detection stage: suspending a control end P of the starting box; collecting the port waveform of an output port A, B, C, D, E, F, G, H, I of the starting box; calculating the waveform level jump time to obtain a time value and calculating an error value between the time value and a standard value; displaying the waveform on the main interface, and simultaneously displaying the calculated time value on a control corresponding to the waveform; when the output ports are as shown in the standard waveform in FIG. 6 and the error is within the range of Ts + -0.1 s, the start box is determined to be normal.
And a third stage, simulating an interruption detection stage: after applying a waveform S (+28V power supply 2S + -1.5S, recommended time 1S + -0.1S) to the S terminal of the starting box, after interrupting 1: 1.5s ± 0.1s, interrupt 2: 7.5s ± 0.1s, interrupt 3: 20s ± 0.1s, interrupt 4: carrying out +28V power-down interruption at four time points of 50s +/-0.1 s, wherein interruption ports are Z1, Z2, Z3 and Z4 which are carried out in sequence;
interrupt 1 is executed within 2 s-5 s, and the waveform of the output port OUT end of the starting box is shown as A in FIG. 5;
interrupt 2 is executed within 5 s-10 s, and the waveform of the output port OUT end of the starting box is shown as B in FIG. 5;
interrupt 3 is executed within 10 s-30 s, and the waveform of the output port OUT end of the start box is shown as C in FIG. 5;
interrupt 4 is executed within 30 s-60 s, and the waveform of the output port OUT end of the start box is shown as D in FIG. 5;
the fourth stage, the detection stage after parking: the control terminal X of the start box is disconnected from the ground 10s and the output port Y of the start box has a waveform as shown in fig. 7.
In the above four detection stages, when the detection device detects that the waveforms of the output ports of the starting box are as shown in the corresponding diagram and the error value is within the corresponding error range, the starting box is judged to be normal.
The thread cycle of the input and output is NTs (e.g., 20ms) as an example. The program designed in the detection device adopts various array forms to carry out voltage acquisition on each input channel and each output channel, judges rising edges and falling edges and calculates the time for jumping. And organizing the product information M, the test temperature T, the test step N and the data storage index i of the starting box in a structural body mode. The user interface adopts a drawing control to display, store and playback waveforms of 31 channels, performs waveform amplification, jump time node calculation and numerical value display through the combined operation of a keyboard and a mouse, and can display a selected curve and hide other curves according to requirements. And in the four detection stages, the time and the error obtained by running and calculating in each detection stage are displayed to the corresponding position of the form control and are stored in the database. When the detection is abnormal, the display and the marking can be performed in a remarkable mode, and a detection report can be automatically generated. In addition, normal temperature, low temperature and high temperature detection can be carried out on the test type interface through control selection.
The detection device and the detection method for the starting box of the invention realize the following main advantages and functions:
1) the device realizes the conditioning requirements of analog quantity input and analog quantity output required by the starting box and realizes the automation of the detection process of the detection items specified by the acceptance technical conditions of the starting box;
2) the computer collects, processes and calculates the detection parameters of the starting box, thereby improving the consistency of the detection result and avoiding the human error of the detection personnel;
3) the system has a good graphical interface, displays detection process parameters and detection results to detection personnel, records detection process data in real time, can display and mark in a remarkable mode when detecting abnormity, and can automatically generate a detection report.
4) The historical data and the detection report can be replayed according to the inspector, the test type, the test time, the detection result and the like, and data analysis is facilitated.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A detection device for a starting box, comprising:
the acquisition and transmission module (100) is used for acquiring waveform signals of corresponding output ports of the starting box at each detection stage, preprocessing the acquired waveform signals and then transmitting the preprocessed waveform signals;
the calculating module (200) is used for receiving the signals sent by the collecting and sending module (100), calculating the waveform level jump time of the received signals to obtain a time value, and calculating an error value between the time value and a standard value;
the judging module (300) is used for judging whether the waveform signal is the same as a standard waveform and whether the error value is in a preset range, and if so, judging that the starting box is normal; if not, judging that the starting box is abnormal;
the acquisition and transmission module (100) comprises an A/D conditioning submodule, a D/A conditioning submodule, a DI conditioning submodule and a DO conditioning submodule, wherein the A/D conditioning submodule is used for isolating and filtering a voltage signal output by the starting box, the D/A conditioning submodule is used for isolating and amplifying the voltage signal output by the detection device, the DI conditioning submodule is used for dividing and isolating a switch signal output by the starting box, and the DO conditioning submodule is used for isolating the switch signal output by the detection device and amplifying current.
2. The detection apparatus of a starting box according to claim 1, further comprising:
the database module (400) is used for storing the time value and the error value which are calculated by the calculating module (200) and a judgment result obtained by the judging module (300);
and the display module (500) is used for visually displaying the data and the results stored in the database module (400).
3. The detection apparatus of a starting box according to claim 2, further comprising:
and the report generation module (600) is used for reading the data and the results stored in the database module (400) and generating a detection report so as to realize the query and printing of the judgment result.
4. A method for inspecting a starter box using the inspection apparatus according to any one of claims 1 to 3, comprising the steps of:
collecting waveform signals of corresponding output ports of the starting box at each detection stage, preprocessing the collected waveform signals and then sending the preprocessed waveform signals;
calculating the waveform level jump time of the preprocessed signal to obtain a time value, and calculating an error value between the time value and a standard value;
judging whether the waveform signal is the same as a standard waveform and whether the error value is within a preset range, if so, judging that the starting box is normal; if not, judging that the starting box is abnormal.
5. The method of detecting a starter box according to claim 4, further comprising:
storing the calculated time value, the calculated error value and a judgment result obtained by judgment into a database;
and visually displaying the stored data and results.
6. The method of detecting a starter box according to claim 5, further comprising:
and displaying the waveform signal output by the starting box on a display interface.
7. The method of detecting a starter box according to claim 5, further comprising:
and reading the data and the results stored in the database, generating a detection report and realizing the query and printing of the judgment result.
8. The method for detecting a starting box according to any one of claims 4 to 7, wherein the detection method is performed in sequence according to four detection stages, i.e., an ignition operation detection stage, a non-ignition detection stage, a middle section simulation detection stage, and a post-stop detection stage.
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| CN102840882A (en) * | 2012-09-04 | 2012-12-26 | 中国海洋石油总公司 | State monitoring and fault diagnosis system of gas turbine generating unit and use method of state monitoring and fault diagnosis system |
| CN103670718A (en) * | 2013-12-12 | 2014-03-26 | 中国南方航空工业(集团)有限公司 | Electric starting control method and device for gas turbine |
| CN105240131A (en) * | 2015-09-02 | 2016-01-13 | 中国南方航空工业(集团)有限公司 | Control method and device for gas turbine |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102840882A (en) * | 2012-09-04 | 2012-12-26 | 中国海洋石油总公司 | State monitoring and fault diagnosis system of gas turbine generating unit and use method of state monitoring and fault diagnosis system |
| CN103670718A (en) * | 2013-12-12 | 2014-03-26 | 中国南方航空工业(集团)有限公司 | Electric starting control method and device for gas turbine |
| CN105240131A (en) * | 2015-09-02 | 2016-01-13 | 中国南方航空工业(集团)有限公司 | Control method and device for gas turbine |
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