CN107544478B - Automatic analog quantity testing device and method in nuclear power DCS identification - Google Patents
Automatic analog quantity testing device and method in nuclear power DCS identification Download PDFInfo
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Abstract
The invention belongs to the technical field of system performance test in nuclear power DCS, and provides an analog quantity automatic test device and method in nuclear power DCS identification, which can simultaneously realize precision test, temperature drift and time drift monitoring in DCS monitoring; the device comprises: the temperature sensors are respectively arranged in different analog quantity channels of the nuclear power DCS and are arranged in the constant temperature test box together with the nuclear power DCS; the signal conditioning modules are used for respectively receiving the temperature signals of the temperature sensors and converting the temperature signals into electric signals; the industrial computer comprises a data acquisition board card, a memory and a controller, wherein the data acquisition board card is arranged to be capable of receiving the electric signals of the signal conditioning modules, and the memory is capable of storing the electric signals received by the data acquisition board card; and the controller calculates time drift and/or temperature drift parameters of an analog quantity channel of the nuclear power DCS in the nuclear power DCS identification based on the electric signals stored in the memory.
Description
Technical Field
The invention relates to the technical field of system performance testing in nuclear power DCS, in particular to an analog quantity automatic testing device and method in nuclear power DCS identification.
Background
The nuclear power safety level equipment is required to pass identification before leaving a factory, and in the nuclear power safety level DCS (Distributed Control System) equipment for identification, an analog quantity data acquisition and sending channel is important to the effect of a protection System; the indexes of the analog quantity channel comprise: accuracy, resolution, acquisition speed or setup time, temperature drift, time drift, etc.
Wherein, the specific requirements for temperature drift and time drift include: when the environmental temperature of the equipment changes, the device parameters with temperature characteristics in the equipment are changed along with the change of the environmental temperature, so that the accuracy of the analog quantity channel changes along with the change of the temperature, namely, the temperature drift occurs, and the indexes of common temperature drift parameters are 50 ppm/DEG C or 100 ppm/DEG C, and the like, namely, the allowed change range of the accuracy for every 1 ℃ of the temperature is 50/106 or 100/106 of the range. When the equipment runs for a long time without interruption, components affecting the precision in the equipment age along with the time, and finally the precision is changed, namely time drift occurs; for a nuclear power plant safety level DCS analog quantity channel, the following requirements are generally required: and the analog quantity channel can still meet the precision requirement at 24 months drift. And specific requirements for time drift include: "the input signal should be maintained stable at 90% of the range, … …, measuring the person who lost and the output every working day, and determining and correcting the output drift by calculating any minor changes of the person who lost; care must be taken not to allow changes due to ambient conditions other than time to mask the effects of long term drift. And for electronic products in an instrument control electrical equipment room or a main control room outside the containment, an aging test of alternating damp and heat and long-term operation is required; the aging test comprises the environmental temperatures of 55 ℃, 40 ℃ and the like.
In the prior art, full-automatic testing of the precision of an analog quantity channel is very common in the field of DCS testing, for example, in a Chinese patent with the application number of 201220496632.8, a high-precision multi-channel analog quantity automatic testing system is disclosed, and automatic precision testing of a nuclear safety level DCS identification test is realized by using a plurality of signal analog quantity channel automatic testing devices; and under the complex identification test environment, the full-automatic test of multiple types of signals and multiple analog quantity channels is realized.
But the time drift and the temperature drift are important reasons influencing the channel precision, especially under the environment test condition of the identification activity; in addition, in an identification test, the performance indexes of precision, temperature drift and time drift are concerned, so that the analog quantity channel can be evaluated more comprehensively, and the reason of the problem when the data is abnormal can be located through the tracking of the test. Therefore, a technical scheme capable of simultaneously realizing precision testing and automatic testing of temperature drift and time drift monitoring in nuclear power DCS equipment identification is urgently expected by technical personnel in the field.
It should be noted that some technical contents in the technical solutions mentioned above are also the inventive contents of the present patent application, and the above descriptions are only for facilitating the understanding of the present patent application by those skilled in the art, and do not make the description fall in the scope of the prior art in its entirety.
Disclosure of Invention
The invention aims to solve the technical problem of providing an automatic analog quantity testing device and method in nuclear power DCS identification, which can simultaneously realize precision testing and temperature drift and time drift monitoring in DCS monitoring.
In order to achieve the above object, the technical solution provided by the present invention comprises:
the invention provides an analog quantity automatic testing device in nuclear power DCS identification, which is characterized by comprising the following components:
the temperature sensors are respectively arranged in different analog quantity channels of the nuclear power DCS and are arranged in the constant temperature test box together with the nuclear power DCS;
the signal conditioning modules are used for respectively receiving the temperature signals of the temperature sensors and converting the temperature signals into electric signals;
the industrial computer comprises a data acquisition board card, a memory and a controller, wherein the data acquisition board card is arranged to be capable of receiving the electric signals of the signal conditioning modules, and the memory is capable of storing the electric signals received by the data acquisition board card; and the controller calculates time drift and/or temperature drift parameters of an analog quantity channel of the nuclear power DCS in the nuclear power DCS identification based on the electric signals stored in the memory.
Preferably, in the embodiment of the present invention, the apparatus further includes: a channel switching relay connected with the data acquisition board card through an Ethernet; the controller controls a plurality of paths of digital quantity signal output ports of the data acquisition board card to control switching channels of the multi-path switching relay.
Preferably, in the embodiment of the present invention, when testing the analog quantity acquisition channel of the system under test, the channel acquisition data sent by the system under test is acquired through the ethernet port; when the analog quantity output channel of the tested system is tested, the theoretical output value of the analog quantity output channel is sent to the tested system through the Ethernet port.
Preferably, the device further comprises an instrument arranged between the industrial computer and the channel switching relay, and the instrument can output and collect various analog quantity signals.
Preferably, in the embodiment of the present invention, the temperature sensor is a four-wire temperature measuring resistor type temperature sensor.
In another aspect of the present invention, an automatic analog quantity testing method in nuclear power DCS identification is provided, which includes:
respectively collecting temperature parameters in different analog quantity channels of the nuclear power DCS;
respectively receiving temperature parameters in different analog quantity channels of the nuclear power DCS, and converting the temperature parameters into electric signals;
receiving the converted electrical signal and storing the converted electrical signal in a memory; and then calculating time drift and/or temperature drift parameters of an analog quantity channel of the nuclear power DCS in the nuclear power DCS identification based on the electric signals stored in the memory.
Preferably, in the embodiment of the present invention, the method further includes: and the multi-channel digital quantity signal output port of the data acquisition board card is controlled to control the switching channel of the multi-channel switching relay.
Preferably, in the embodiment of the present invention, when testing the analog quantity acquisition channel of the system under test, the channel acquisition data sent by the system under test is acquired through the ethernet port; when the analog quantity output channel of the tested system is tested, the theoretical output value of the analog quantity output channel is sent to the tested system through the Ethernet port.
Preferably, in the embodiment of the present invention, the method further includes: and outputting and collecting various analog quantity signals through an instrument connected with the channel switching relay.
Preferably, in the embodiment of the invention, the temperatures of the positions in the different analog quantity channels are respectively and simultaneously acquired by the four-wire temperature measuring resistor type temperature sensors.
By adopting the technical scheme provided by the application, at least one of the following beneficial effects can be obtained:
1. based on the mechanism of aging analysis, the time drift and temperature drift are integrated into an equipment identification test, so that the test efficiency is improved, and the mutual influence of the temperature drift and the time drift can be comprehensively evaluated.
2. During testing, each channel to be tested is subjected to multipoint precision, so that the test is more comprehensive.
3. The full-automatic test of precision test and temperature drift and time drift monitoring is realized simultaneously in the nuclear power DCS equipment identification.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure and/or process particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
Fig. 1 is a block diagram of an analog quantity automatic testing apparatus in nuclear power DCS identification according to an embodiment of the present invention.
Fig. 2 is a block diagram of an analog quantity automatic testing apparatus in nuclear power DCS identification according to another embodiment of the present invention.
Fig. 3 is a flowchart of an analog quantity automatic testing method in nuclear power DCS identification according to an embodiment of the present invention.
Fig. 4 is a flowchart of an automatic analog testing method in nuclear power DCS identification according to another embodiment of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention will be provided with reference to the drawings and examples, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented. It should be noted that the detailed description is only for the purpose of making the invention easier and clearer for those skilled in the art, and is not intended to be a limiting explanation of the invention; moreover, as long as there is no conflict, the embodiments and the features of the embodiments of the present invention may be combined with each other, and the technical solutions formed are all within the scope of the present invention.
Additionally, the steps illustrated in the flow charts of the drawings may be performed in a control system such as a set of controller-executable instructions and, although a logical ordering is illustrated in the flow charts, in some cases, the steps illustrated or described may be performed in an order different than that illustrated herein.
The technical scheme of the invention is described in detail by the figures and the specific embodiments as follows:
the inventors found during the completion of the tests for time and/or temperature drift in this patent application:
1. because the test box of the identification test can only control the overall temperature in the box and cannot position the local temperature of the tested hardware board card, the temperature sensor needs to be arranged near the tested board card when the temperature drift is tested. Therefore, a plurality of temperature sensors are required to simultaneously acquire the temperature when the testing device performs the precision test.
2. It is necessary to analyze and identify whether the aging mechanism of the long-term running test can meet the aging requirement of 24 months. According to the relevant identification standards, the requirements of the long-term operation test of the environmental test in the identification of the safety-level DCS equipment of the nuclear power plant are as follows: the equipment is arranged in the incubator and continuously works in an operating state, the temperature in the incubator is firstly raised to 55 ℃, the operation is carried out for 300 hours, then the temperature is changed to 40 ℃, and the operation is carried out for 300 hours; before and after the test, a reference test was conducted at ambient temperature. The aging mechanism for this is calculated as follows:
calculating the accelerated coefficient A ═ e of the test life according to the Arrenius equationEa(T-T0)KTOT shows:
here Ea activation energy is unknown, and temporarily taken as 0.67;
k is Boltzmann constant with a value of 8.617E-5;
the normal temperature operation condition is 25 ℃, the maximum temperature rise is 10 ℃, so that the temperature T0 is 35 ℃;
the acceleration coefficient is 1.49 under the condition that the temperature is T-40 ℃;
the acceleration coefficient is 57.05 under the condition that T is 55 ℃;
the long-term running test can verify that the service life is 300 × 1.49+300 × 57.05 ═ 17562 h;
the verification life is required to be 24 months, namely 24 × 30 × 24 ═ 17280 h;
the requirements of the life verification test can be met only by meeting the requirements.
Wherein, the activation energy parameter taken in the calculation is 0.67 (generally 0.5-0.7 according to the electron migration), which may be suggested to be too high. But referring to the EJ 1197-2007 standard requirement, the eV of not more than 0.8 is in the acceptance range, namely, the standard requirement is met.
The requirements of the comprehensive temperature and humidity test identified by the tested system are as follows: the tested system works at the running state, 55 ℃ and 95% RH, and is maintained for 48 h; 1.2 ℃ and 5% RH, and the temperature is maintained for 8h ", so that the requirement of verification environment on temperature drift can be met.
It follows that the long run tests in the assay have covered the 24 month ageing requirement; the temperature and humidity comprehensive test, the long-term operation test and the benchmark test before and after each test item also cover the requirement on temperature drift verification; namely, the stress requirement of the temperature drift and time drift test of analog quantity precision can be met through an environmental test of equipment identification.
Examples
As shown in fig. 1, an embodiment of the present invention provides an automatic analog quantity testing apparatus in nuclear power DCS identification, including:
a plurality of temperature sensors 210, 220, 230 respectively arranged in different analog quantity channels of the nuclear power DCS and arranged in a constant temperature test chamber (a section corresponding to a dotted line frame in FIG. 1) together with the nuclear power DCS; namely, 1 or more temperature sensors can be respectively arranged in each analog quantity channel of the nuclear power DCS, so that real-time temperature information of each analog quantity channel can be obtained in time;
a plurality of signal conditioning modules 310, 320, and 330, respectively receiving the temperature signals of the plurality of temperature sensors 210, 220, and 230, and converting the temperature signals into electrical signals; that is, each temperature sensor 210, 220, 230 is provided with a signal conditioning module 310, 320, 330, respectively, and then converts the temperature signal of each temperature sensor 210, 220, 230 into an electrical signal (e.g., a current signal); certainly, the multiple signal conditioning modules 310, 320, and 330 may be respectively disposed on one hardware circuit board or integrated into another hardware circuit board according to actual requirements;
the industrial computer 400 comprises a data acquisition board 410, a memory 420 and a controller 430, wherein the data acquisition board 410 is configured to receive the electric signals of the plurality of signal conditioning modules 310, 320 and 330, and the memory is configured to store the electric signals received by the data acquisition board 410; the controller 430 calculates a time drift and/or a temperature drift parameter of an analog channel of the nuclear power DCS in the nuclear power DCS identification based on the electric signal stored in the memory.
Therefore, by the testing device, the temperature drift verification is also covered by the benchmark tests before and after each test item by combining the value change of the existing analog quantity channel of the nuclear power DCS in the testing device; therefore, the aging analysis mechanism is combined as a basis, the time drift and the temperature drift are integrated into the equipment identification test, the test efficiency is improved, and the mutual influence of the temperature drift and the time drift can be comprehensively evaluated.
Preferably, in this embodiment, the testing apparatus further includes: a channel switching relay connected with the data acquisition board card through the Ethernet; the controller controls a plurality of paths of digital quantity signal output ports of the data acquisition board card to control switching channels of the multi-path switching relay.
Further preferably, in this embodiment, when testing the analog quantity acquisition channel of the system under test, the channel acquisition data sent by the system under test is acquired through the ethernet port; when the analog quantity output channel of the tested system is tested, the theoretical output value of the analog quantity output channel is sent to the tested system through the Ethernet port.
Preferably, the testing device further comprises a meter arranged between the industrial computer and the channel switching relay, and the meter can output and collect various analog quantity signals.
Preferably, the temperature sensor is a four-wire temperature measuring resistor type temperature sensor.
More specifically, as shown in fig. 2, an automatic analog testing device in nuclear power DCS identification according to another embodiment of the present application includes:
1) the numbers 210, 220 and 230 are temperature sensors, and PT100 type four-wire temperature measuring resistors are adopted; the number of the resistors is determined according to the test requirements and the characteristics of the product.
2) Reference numerals 310, 320, 330 denote signal conditioning modules which convert the temperature signal (represented by resistance values) into a 4-20mA current signal.
3) The connecting wire between the temperature sensor and the signal conditioning module is a temperature signal transmission cable, a multi-core cable with shielding is adopted, the wire diameter is not less than 1mm2, and the wire length is not more than 25 m.
4) The number 400 is an industrial computer, calculates and stores test records by loading and running automatic test software, and can output test reports in a specified format. The computer is provided with a data acquisition board card '410', an Ethernet port and a serial communication port, which are specifically explained as follows:
a) the data acquisition board card 410 is provided with a multi-channel analog quantity signal acquisition port for acquiring the temperature signal transmitted by the conditioning module; meanwhile, a data acquisition board card is required to provide a plurality of paths of digital quantity signal output ports for controlling a plurality of paths of switching relays; thus, a serial, fully automated test of multiple channels can be achieved with a high precision meter 600 (typically providing only one test channel);
b) the Ethernet port is used for realizing communication with the tested system, and when an analog quantity acquisition channel of the tested system is tested, the Ethernet port acquires channel acquisition data sent by the tested system; when an analog output channel of a tested system is tested, transmitting a theoretical output value of the analog output channel to the tested system through an Ethernet port;
c) and the serial communication port is used for being connected with the instrument to be tested, so that the automatic control of the high-precision instrument is realized.
5) "number 600" is a high-precision instrument, and the requirements for the instrument are as follows:
a) and according to the standard requirements: "the precision of the test equipment is 4 times higher than that of the tested system";
b) the instrument can output and collect various analog quantity signals, and the types, measuring ranges and precision of the signals all meet the testing requirements;
c) the communication protocol of the instrument is open, and the instrument can be controlled by the communication port of the industrial computer to output data and transmit collected signals.
6) The number 700 is a channel switching relay, and channel switching can be performed through a digital output channel of the data acquisition board card, so that multi-channel serial automatic testing is realized.
7) The lead between the channel switching relay and the channel port of the system to be tested is a test signal transmission cable, a 25-core cable with shielding is adopted, the wire diameter is larger than 0.1mm2, and the wire length is 25 m.
The "constant temperature test chamber" in fig. 2 is a test device provided in a laboratory, and the "system under test" is a system to be tested in the present patent.
As shown in fig. 3, an embodiment of the present application provides an automatic analog quantity testing method in nuclear power DCS identification, including:
s110, respectively collecting temperature parameters in different analog quantity channels of the nuclear power DCS; namely, 1 or more temperature sensors can be respectively arranged in each analog quantity channel of the nuclear power DCS, so that real-time temperature information of each analog quantity channel can be obtained in time;
s120, respectively receiving temperature parameters in different analog quantity channels of the nuclear power DCS, and converting the temperature parameters into electric signals; that is, each temperature sensor 210, 220, 230 is provided with a signal conditioning module 310, 320, 330, respectively, and then converts the temperature signal of each temperature sensor 210, 220, 230 into an electrical signal (e.g., a current signal); certainly, the multiple signal conditioning modules 310, 320, and 330 may be respectively disposed on one hardware circuit board or integrated into another hardware circuit board according to actual requirements;
s130, receiving the converted electric signal and storing the converted electric signal in a memory; and then calculating time drift and/or temperature drift parameters of an analog quantity channel of the nuclear power DCS in the nuclear power DCS identification based on the electric signals stored in the memory.
Therefore, by the testing device, the temperature drift verification is also covered by the benchmark tests before and after each test item by combining the value change of the existing analog quantity channel of the nuclear power DCS in the testing device; therefore, the aging analysis mechanism is combined as a basis, the time drift and the temperature drift are integrated into the equipment identification test, the test efficiency is improved, and the mutual influence of the temperature drift and the time drift can be comprehensively evaluated
Preferably, in this embodiment, the method further includes: and the multi-channel digital quantity signal output port of the data acquisition board card is controlled to control the switching channel of the multi-channel switching relay.
In this embodiment, preferably, when testing the analog quantity acquisition channel of the system under test, the channel acquisition data sent by the system under test is acquired through the ethernet port; when the analog quantity output channel of the tested system is tested, the theoretical output value of the analog quantity output channel is sent to the tested system through the Ethernet port.
Preferably, in this embodiment, the method further includes: and various analog quantity signals are output and collected through an instrument connected with the channel switching relay.
Preferably, in this embodiment, the temperatures of the positions in the different analog channels are respectively and simultaneously acquired by the four-wire temperature measuring resistor type temperature sensor.
As shown in fig. 4, another aspect of the present application provides an automatic analog quantity testing method in nuclear power DCS identification, including:
s200, reading configuration parameters, namely reading preset to-be-executed parameters stored in a memory of an industrial computer according to actual test requirements by the industrial computer, wherein the parameters can enable an analog quantity channel of a tested system to execute preset signal output; the configuration parameters comprise the testing time point interval of each channel, the number of the testing points in each channel, the reference value and the precision standard (basis) of each parameter;
s202, recording time: when the test is started, recording the current time;
s204, collecting temperature, carrying out weighted average on a plurality of collected temperatures, namely a plurality of samples, and then taking the weighted average as a temperature output value after calculation;
s206, sending data, and sending temperature parameters through a network port and/or a high-precision instrument;
s208, waiting for the data channel to be stable;
s210, collecting output, namely collecting temperature parameters through a network port and/or a high-precision instrument;
s212, calculating precision, namely whether the precision of the output parameter of the analog quantity channel meets the requirement or not;
s214, judging whether the precision meets the requirement, if so, executing a step S218, otherwise, executing a step S216;
s216, prompting whether to stop the test, if so, executing the step S220, otherwise, executing the step S218;
s218, recording data, and then executing the step S212;
s220, generating an exception report;
s222, judging whether the current testing channel is tested to be finished or not, and if so, executing a step S226; otherwise, go to step S224;
s224, switching to the next test point to execute the test, and returning to the step S206;
s226, judging whether the testing of all channels is finished, if so, executing the step S228; otherwise, go to step S230;
s228, continuously judging whether the preset time is reached, if so, executing the step S234; otherwise, go to step S232;
s230, switching to the next channel, and continuing to execute the step S204;
s232, waiting for the next test starting time, and then executing the step S202;
and S234, ending.
By adopting the technical scheme provided by the application, at least one of the following beneficial effects can be obtained:
1. based on the mechanism of aging analysis, the time drift and temperature drift are integrated into an equipment identification test, so that the test efficiency is improved, and the mutual influence of the temperature drift and the time drift can be comprehensively evaluated.
2. During testing, each channel to be tested is subjected to multipoint precision, so that the test is more comprehensive.
3. The full-automatic test of precision test and temperature drift and time drift monitoring is realized simultaneously in the nuclear power DCS equipment identification.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Finally, it should be understood that the above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Those skilled in the art can make many changes and simple substitutions to the technical solution of the present invention without departing from the technical solution of the present invention, and the technical solution of the present invention is protected by the following claims.
Claims (8)
1. An analog quantity automatic testing device in nuclear power DCS identification is characterized by comprising:
a plurality of temperature sensors respectively arranged in different analog quantity channels of the nuclear power DCS and arranged in a constant temperature test box together with the nuclear power DCS, wherein different temperatures can be applied to the constant temperature test box; when the temperature drift is tested, the temperature sensors are arranged near the tested board card, and the temperature is acquired while the testing device is used for testing the precision;
the signal conditioning modules are used for respectively receiving the temperature signals of the temperature sensors and converting the temperature signals into electric signals; in the process of collecting the temperature, after weighted average calculation is carried out on a plurality of collected temperatures, the temperature is used as a temperature output value; when an analog quantity acquisition channel of a system to be tested is tested, acquiring channel acquisition data sent by the system to be tested through an Ethernet port; when an analog quantity output channel of a tested system is tested, transmitting a theoretical output value of the analog quantity output channel to the tested system through an Ethernet port;
the industrial computer comprises a data acquisition board card, a memory and a controller, wherein the data acquisition board card is arranged to be capable of receiving the electric signals of the signal conditioning modules, and the memory is capable of storing the electric signals received by the data acquisition board card; the controller calculates time drift and/or temperature drift parameters of an analog quantity channel of the nuclear power DCS in the nuclear power DCS identification based on the electric signals stored in the memory;
wherein the controller is used for calculating the time drift and/or temperature drift parameters of the analog quantity channel of the nuclear power DCS in the nuclear power DCS identification based on the electric signals stored in the memory, and the parameters comprise: the method comprises the steps of determining that a benchmark test before and after each test item covers temperature drift verification on the basis of an aging analysis mechanism by combining the value change of an existing analog quantity channel of the nuclear power DCS in a test device, and integrating two tests of time drift and temperature drift into an equipment identification test;
when the testing arrangement carries out the precision test, carry out temperature acquisition simultaneously specifically including: calculating whether the precision of the analog quantity channel output parameter of the nuclear power DCS meets the requirement, and prompting whether to stop the test when the precision of the analog quantity channel output parameter of the nuclear power DCS does not meet the requirement; when the requirements are met, the data is recorded.
2. The apparatus of claim 1, further comprising: a channel switching relay connected with the data acquisition board card through an Ethernet; the controller controls a plurality of paths of digital quantity signal output ports of the data acquisition board card to control switching channels of the multi-path switching relay.
3. The apparatus of claim 1, further comprising a meter disposed between the industrial computer and the channel switching relay, the meter capable of outputting and collecting a plurality of analog signals.
4. A device according to any one of claims 1-3, characterized in that the temperature sensor is of the four-wire temperature measuring resistor type.
5. An analog quantity automatic test method in nuclear power DCS identification is characterized by comprising the following steps:
temperature parameters in different analog quantity channels of the nuclear power DCS are acquired through a plurality of different temperature sensors respectively, and different temperatures can be applied to constant temperature test boxes in which the different temperature sensors are located; when the temperature drift is tested, a plurality of temperature sensors are arranged near the tested board card, and temperature acquisition is carried out while the testing device carries out precision testing;
respectively receiving temperature parameters in different analog quantity channels of the nuclear power DCS, and converting the temperature parameters into electric signals; in the process of collecting the temperature, after weighted average calculation is carried out on a plurality of collected temperatures, the temperature is used as a temperature output value; when an analog quantity acquisition channel of a system to be tested is tested, acquiring channel acquisition data sent by the system to be tested through an Ethernet port; when an analog quantity output channel of a tested system is tested, transmitting a theoretical output value of the analog quantity output channel to the tested system through an Ethernet port;
receiving the converted electrical signal and storing the converted electrical signal in a memory; then, calculating time drift and/or temperature drift parameters of an analog quantity channel of the nuclear power DCS in the nuclear power DCS identification based on the electric signals stored in the memory;
wherein calculating time drift and/or temperature drift parameters of an analog channel of the nuclear power DCS in the nuclear power DCS identification based on the electrical signals stored in the memory comprises: the method comprises the steps of determining that a benchmark test before and after each test item covers temperature drift verification on the basis of an aging analysis mechanism by combining the value change of an existing analog quantity channel of the nuclear power DCS in a test device, and integrating two tests of time drift and temperature drift into an equipment identification test;
when the testing arrangement carries out the precision test, carry out temperature acquisition simultaneously specifically including: calculating whether the precision of the analog quantity channel output parameter of the nuclear power DCS meets the requirement, and prompting whether to stop the test when the precision of the analog quantity channel output parameter of the nuclear power DCS does not meet the requirement; when the requirements are met, the data is recorded.
6. The method of claim 5, further comprising: and the multi-channel digital quantity signal output port of the data acquisition board card is controlled to control the switching channel of the multi-channel switching relay.
7. The method of claim 5, further comprising: and outputting and collecting various analog quantity signals through an instrument connected with the channel switching relay.
8. The method according to claim 5, characterized in that the temperatures of the positions in the different analog channels are respectively collected simultaneously by means of a four-wire temperature measuring resistor type temperature sensor.
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