Detection system and detection method for cathode protection data acquisition instrument

Abstract

The invention discloses a detection system and a detection method for a cathode protection data acquisition instrument. The detection system comprises a power supply module, a channel switching module and a control module. The channel switching module comprises a transmission bus, a plurality of input channels and a plurality of output channels; the plurality of input paths are connected with a plurality of power supply output ends of the power supply module in a one-to-one correspondence manner; the plurality of output channels are respectively configured with different test functions, and each output channel is connected with a test piece corresponding to the configured test function; the control module is used for respectively controlling each test channel corresponding to a to-be-tested test function to be conducted according to the to-be-tested test function of the cathode protection data acquisition instrument; wherein when any test channel is switched on, the control module is used for controlling the power supply module to output a power signal of a corresponding type through the power output end connected with the switched-on test channel, and judging whether the test function to be tested is qualified or not according to a response signal of the cathode protection data acquisition instrument to the power signal, and the detection efficiency can be improved.

Description

Technical Field

[0001] This invention relates to the field of circuit testing technology, and in particular to a cathode-protected data acquisition instrument testing system and testing method. Background Technology

[0002] Existing electronic devices generally adopt a "one-to-one" power supply architecture, that is, a single power input corresponds to a single load. This design originates from the basic requirements for circuit safety and stability in the power supply standards of early electronic devices.

[0003] However, during product development and testing, it is often necessary to input multiple voltage and current levels, which requires repeated adjustment and plugging / unplugging of power supply and testing equipment, resulting in a lot of wasted time and low testing efficiency. Summary of the Invention

[0004] This invention provides a detection system and method for cathode-ray cell data acquisition instruments to improve the detection efficiency of cathode-ray cell data acquisition instruments.

[0005] According to one aspect of the present invention, a cathodic protection data acquisition instrument testing system is provided, wherein the cathodic protection data acquisition instrument includes an acquisition cable, and the acquisition cable includes a plurality of test pieces;

[0006] The cathode ray cell data acquisition system includes:

[0007] The power supply module includes multiple power output terminals; the power supply module outputs different types of power signals through different power output terminals.

[0008] The channel switching module includes a transmission bus, multiple input paths, and multiple output paths; all of the multiple input paths and multiple output paths are connected to the transmission bus; each of the multiple input paths is connected to a corresponding power output terminal; each of the multiple output paths is configured with a different test function, and each output path is connected to the test piece corresponding to the configured test function; wherein, any output path and any input path constitute a test channel, and each test function corresponds to at least one test channel;

[0009] The control module is communicatively connected to the power supply module, the channel switching module, and the cathode protection data acquisition instrument. The control module controls the activation of each test channel corresponding to the test function to be tested by the cathode protection data acquisition instrument, based on the test function to be tested. When any test channel is activated, the control module controls the power supply module to output a power signal of the corresponding type through the power output terminal connected to the activated test channel, and determines whether the test function to be tested is qualified based on the response signal of the cathode protection data acquisition instrument to the power signal.

[0010] Optionally, the transmission bus includes a first bus and a second bus, the power output terminal includes a first terminal and a second terminal, the input path includes a first switch and a second switch, and the output path includes a third switch and a fourth switch;

[0011] For the corresponding power output terminal and input path: the first end of the first switch is connected to the first terminal, the first end of the second switch is connected to the second terminal, the second end of the first switch is connected to the first bus, and the second end of the second switch is connected to the second bus.

[0012] For any of the output paths: the first end of the third switch is connected to the first bus, the first end of the fourth switch is connected to the second bus, and the second ends of the third switch and the fourth switch are respectively connected to different test pieces corresponding to the test functions configured in the output path.

[0013] Optionally, the acquisition cable includes six test pieces, which are polarization test piece, reference test piece, corrosion test piece, current test piece, anode test piece and pipeline test piece, respectively.

[0014] The plurality of output paths include:

[0015] First output path; the first output path is configured with a power-on potential test function, the second end of the third switch in the first output path is connected to the polarized test piece, and the second end of the fourth switch in the first output path is connected to the reference test piece;

[0016] Second output channel; the second output channel is configured with a power-off potential test function, the second terminal of the third switch in the second output path is connected to the polarization test piece, and the second terminal of the fourth switch in the second output path is connected to the reference test piece;

[0017] The third output path is configured with a tube-to-ground AC potential testing function. The second terminal of the third switch in the third output path is connected to the polarization test piece, and the second terminal of the fourth switch in the third output path is connected to the reference test piece.

[0018] A fourth output path; the fourth output path is configured with a natural corrosion potential testing function, the second end of the third switch in the fourth output path is connected to the corrosion test piece, and the second end of the fourth switch in the fourth output path is connected to the reference test piece;

[0019] The fifth output path is configured with a test piece AC current testing function. The second terminal of the third switch in the fifth output path is connected to the current test piece and the anode test piece. The second terminal of the fourth switch in the fifth output path is connected to the pipe test piece.

[0020] The sixth output path is configured with a DC current testing function for a test piece. The second terminal of the third switch in the sixth output path is connected to the current test piece and the anode test piece, and the second terminal of the fourth switch in the sixth output path is connected to the pipe test piece.

[0021] The seventh output path is configured with a magnesium foil current testing function. The second end of the third switch in the seventh output path is connected to the anode test piece, and the second end of the fourth switch in the seventh output path is connected to the pipe test piece.

[0022] The eighth output path is configured with a magnesium foil open-circuit voltage test function. The second terminal of the third switch in the eighth output path is connected to the anode test piece, and the second terminal of the fourth switch in the eighth output path is connected to the reference test piece.

[0023] Optionally, the power supply module includes:

[0024] The five power output terminals are respectively the first power output terminal, the second power output terminal, the third power output terminal, the fourth power output terminal and the fifth power output terminal;

[0025] A DC power supply is connected to a first power output terminal, a second power output terminal, and a third power output terminal, respectively. The DC power supply outputs a first DC voltage signal or a first DC current signal through the first power output terminal, a second DC voltage signal through the second power output terminal, and a second DC current signal through the third power output terminal. The absolute value of the voltage of the first DC voltage signal is lower than the absolute value of the voltage of the second DC voltage signal, and the absolute value of the current of the first DC current signal is lower than the absolute value of the current of the second DC current signal.

[0026] An AC power supply is connected to the fourth power output terminal and the fifth power output terminal respectively. The fourth power output terminal is used to output an AC voltage signal, and the fifth power output terminal is used to output an AC current signal.

[0027] According to another aspect of the present invention, a method for testing a cathode ray tube data acquisition instrument is provided, which is applied to the cathode ray tube data acquisition instrument testing system provided in any embodiment of the present invention, and is executed by the control module;

[0028] The method includes:

[0029] When the test piece corresponding to the test function to be tested in the cathodic protection data acquisition instrument is connected to the channel switching module, the test channels corresponding to the test function to be tested are respectively controlled to be turned on; wherein, when any test channel is turned on, the power supply module is controlled to output a power signal of the corresponding type through the power output terminal connected to the turned-on test channel, receive the response signal of the cathodic protection data acquisition instrument to the power signal, and determine whether the value of the response signal is within the preset range corresponding to the response signal;

[0030] When the values ​​of each response signal are within their respective preset ranges, the test function to be tested is deemed qualified.

[0031] If at least one of the response signals is outside its corresponding preset range, the test function to be tested is determined to be unqualified.

[0032] Optionally, the cathode data acquisition instrument includes multiple test functions to be tested; the method further includes:

[0033] When all test pieces corresponding to the test functions to be tested in the cathode data acquisition instrument are connected to the channel switching module, the test functions to be tested are tested sequentially according to the preset test order.

[0034] Optionally, the cathodic protection data acquisition instrument is deemed qualified when all the test functions to be tested pass.

[0035] If one of the test functions to be tested is found to be unqualified, the current test process ends and the cathode data acquisition instrument is determined to be unqualified; or, if at least one test function to be tested is found to be unqualified after all the test functions to be tested have been tested, the cathode data acquisition instrument is determined to be unqualified.

[0036] Optionally, when any of the test channels is turned on, before controlling the power supply module to output a power signal of the corresponding type through the power output terminal connected to the turned-on test channel, the method further includes:

[0037] Configure the internal pathways of the cathode data acquisition instrument according to the test function to be tested;

[0038] When controlling the conduction of any of the test channels, the method further includes:

[0039] All input and output paths of the test channels that are not connected are disconnected.

[0040] Optionally, if any of the test functions to be tested requires testing based on different values ​​of a target type power signal, when the test channel corresponding to the target power output terminal that outputs the target type power signal is turned on, the power supply module is controlled to output a power signal of the corresponding type through the power output terminal connected to the turned-on test channel, and to receive the response signal of the cathode protection data acquisition instrument to the power signal, including:

[0041] The power supply module is controlled to output different values ​​of the target type power signal through the target power output terminal in a time-division manner, and to receive the response signals of the cathode protection data acquisition instrument for the different values ​​of the target type power signal respectively.

[0042] Optionally, the power supply module includes: a first power output terminal, a second power output terminal, a third power output terminal, a fourth power output terminal, and a fifth power output terminal; the first power output terminal is used to output a first DC voltage signal or a first DC current signal, the second power output terminal is used to output a second DC voltage signal, the third power output terminal is used to output a second DC current signal, the fourth power output terminal is used to output an AC voltage signal, and the fifth power output terminal is used to output an AC current signal.

[0043] When the test function to be tested is the power-on potential test function, the power-on potential test function needs to be tested based on the first voltage value of the first DC voltage signal, and the second and third voltage values ​​of the second DC voltage signal; wherein, the third voltage value is greater than the first voltage value, the first voltage value is greater than the second voltage value, and the second voltage value is opposite to the third voltage value and equal in absolute value;

[0044] When the test function to be tested is the power-off potential test function, the power-off potential test function needs to be tested based on the first voltage value of the first DC voltage signal, and the second and third voltage values ​​of the second DC voltage signal;

[0045] When the test function to be tested is the AC potential test function for the pipeline, the AC potential test function for the pipeline needs to be tested based on the AC voltage signals with amplitudes of the fourth voltage value, the fifth voltage value and the sixth voltage value respectively; wherein, the amplitude of the sixth voltage value is greater than the amplitude of the fifth voltage value, and the amplitude of the fifth voltage value is greater than the amplitude of the fourth voltage value;

[0046] When the test function to be tested is the natural corrosion potential test function, the natural corrosion potential test function needs to be tested based on the first voltage value of the first DC voltage signal, and the second and third voltage values ​​of the second DC voltage signal;

[0047] When the test function to be tested is the test piece AC current test function, the test piece AC current test function needs to be tested based on the AC current signal with amplitudes of a first current value, a second current value and a third current value respectively; wherein, the amplitude of the third current value is greater than the amplitude of the second current value, and the amplitude of the second current value is greater than the amplitude of the first current value;

[0048] When the test function to be tested is the DC current test function of the test piece, the DC current test function of the test piece needs to be tested based on the fourth current value of the first DC current signal, and the fifth and sixth current values ​​of the second DC current signal; wherein, the sixth current value is greater than the fourth current value, the fourth current value is greater than the fifth current value, and the sixth current value is opposite to the fifth voltage value and the absolute value is equal.

[0049] When the test function to be tested is the magnesium package current test function, the magnesium package current test function needs to be tested based on the seventh current value of the first DC voltage signal, and the eighth and ninth current values ​​of the second DC current signal; wherein, the ninth current value is greater than the seventh current value, the seventh current value is greater than the eighth current value, and the ninth current value is opposite to the eighth current value and has the same absolute value.

[0050] When the test function to be tested is the magnesium foil open-circuit voltage test function, the magnesium foil open-circuit voltage test function needs to be tested based on the first voltage value of the first DC voltage signal, and the second and third voltage values ​​of the second DC voltage signal.

[0051] The technical solution of this invention, through setting a cathodic protection data acquisition instrument testing system, includes a power supply module, a channel switching module, and a control module. The power supply module is configured to output different types of power signals through different power output terminals. The channel switching module includes multiple input paths and multiple output paths, and each of the multiple output paths is configured with different test functions. When testing the cathodic protection data acquisition instrument, the control module first turns on the test channel corresponding to the test function to be tested, so as to connect the test path between the power supply module and each test piece connected to the output path in the test channel. The control module controls the power supply module to output the corresponding type of power signal to power each test piece connected to the output channel. The control module controls the test channels corresponding to each test function to be tested to complete the testing of each test function of the cathodic protection data acquisition instrument. Then, the control module receives the response signals of each test piece to the power signal collected by the cathodic protection data acquisition instrument to determine whether the test function is qualified. In summary, because this testing system is equipped with multiple power output terminals, multiple input paths, and multiple output paths, and is configured with corresponding test channels for each test function, it can quickly complete the testing of multiple test functions of the cathodic protection data acquisition instrument by automatically controlling the switching of test channels and the output of power signals through the control module. There is no need for manual switching of channels or adjustment of power supply, which can shorten the testing time and thus improve the testing efficiency.

[0052] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0053] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0054] Figure 1 This is a schematic diagram of the structure of a cathode ray tube data acquisition instrument detection system provided in an embodiment of the present invention;

[0055] Figure 2 This is a schematic diagram of another cathodic protection data acquisition instrument detection system provided in an embodiment of the present invention;

[0056] Figure 3 This is a timing diagram of the operation during manual testing of the cathode data acquisition instrument;

[0057] Figure 4 This is a timing diagram for the automatic detection of the cathode ray tube data acquisition instrument.

[0058] Figure 5 A flowchart of a cathode ray tube data acquisition instrument detection method provided in an embodiment of the present invention. Detailed Implementation

[0059] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0060] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and their variations, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0061] This invention provides a cathodic protection data acquisition instrument detection system. Figure 1 This is a schematic diagram of a cathode ray cell data acquisition instrument detection system provided in an embodiment of the present invention. (See attached diagram.) Figure 1 The cathode data acquisition instrument 400 includes an acquisition cable, which includes multiple test pieces 401. Figure 1 The example provided shows that the number of test pieces 401 in the acquisition cable can be greater than 4, but this is not intended to limit the invention.

[0062] The cathodic protection data acquisition instrument is a device used for the automatic acquisition and remote transmission of potential data in cathodic protection systems. Cathodic protection systems are widely used in oil and gas pipelines, chemical equipment, power facilities, and other fields to achieve corrosion protection monitoring of metal structures. Test piece 401 is used to connect the protective structure in the cathodic protection system and the necessary positions for achieving the acquisition function. For example, cathodic protection can be achieved through sacrificial anode protection in a cathodic protection system. Specifically, a metal with strong reducing properties is used as the protective electrode (i.e., the protective structure) and connected to the protected metal to form a galvanic cell. The metal with strong reducing properties will act as the anode and undergo an oxidation reaction, thus being consumed. The protected metal, acting as the cathode, can avoid corrosion. Commonly used sacrificial anodes include: aluminum and aluminum alloy sacrificial anodes, magnesium and magnesium alloy sacrificial anodes, and zinc and zinc alloy sacrificial anodes.

[0063] The cathodic protection data acquisition instrument testing system includes a power supply module 10, a channel switching module 20, and a control module 30.

[0064] The power supply module 10 includes multiple power output terminals, and outputs different types of power signals through different power output terminals. Different types of power signals may satisfy at least one of the following: different AC / DC types, different voltage / current types, and different signal amplitudes; for example, DC current and DC voltage are different types of power signals, DC voltage and AC current are different types of power signals, and first DC voltage and second DC voltage with different voltage magnitudes are also different types of power signals, and so on.

[0065] The channel switching module 20 includes a transmission bus, multiple input paths 21, and multiple output paths 22; all input paths 21 and output paths 22 are connected to the transmission bus. Each input path 21 is connected to a corresponding power output terminal; each output path 22 is configured with a different test function, and each output path is connected to the test piece 401 corresponding to its configured test function. Any output path 22 and any input path 21 constitute a test channel, and each test function corresponds to at least one test channel. The specific number of input paths 21 can be determined according to the type of power signal required for testing, and the specific number of output paths 22 can be determined according to the number of test functions required. Furthermore, both input paths 21 and output paths 22 can be redundantly configured for subsequent test function expansion; therefore, the specific number of input paths 21 and output paths 22 is not specifically limited here.

[0066] The control module 30 is communicatively connected to the power supply module 10, the channel switching module 20, and the cathode-coupled device (CCD) data acquisition unit 400. The control module 10 controls the conduction of each test channel corresponding to the test function to be tested by the CCD data acquisition unit 400, based on the test function to be tested. When any test channel is conducted, the control module 10 controls the power supply module 10 to output a corresponding type of power signal through the power output terminal connected to the conducted test channel, and determines whether the test function is qualified based on the CCD data acquisition unit 400's response to the power signal. The control module 30 can be a host computer.

[0067] Because the cathodic protection data acquisition unit 400 needs to acquire multiple data points during normal operation, such as the potential of the protective structure when it is energized, the potential of the protective structure when it is de-energized, and the AC potential of the pipe ground, all acquisition functions of the cathodic protection data acquisition unit 400 need to be tested during factory testing. That is, each test function configured in the testing system is used to test different acquisition functions of the cathodic protection data acquisition unit 400, and the power signals required for different test functions are not entirely the same.

[0068] Specifically, the control module 30 can pre-store the test sequence of the test functions to be tested by the cathodic protection data acquisition instrument 400 and the power signals related to each test function. During the actual test, the control module 30 enables the corresponding test channels to be turned on according to the preset configuration and controls the output of the corresponding type of power signal.

[0069] Understandably, when testing the cathodic protection data acquisition instrument 400, the control module 30, power supply module 10, channel switching module 20 and cathodic protection data acquisition instrument 400 need to be connected in advance according to the test function to be tested to ensure that the test process proceeds smoothly.

[0070] Specifically, during the testing of the cathodic protection data acquisition instrument 400, the control module 30 executes each test function to be tested sequentially according to a preset configuration. Specifically, when testing each test function, for any test channel corresponding to that test function, the corresponding input channel 21 and output channel 22 are first connected to establish the connection between the power supply module 10 and each test piece 401 corresponding to that test function. Then, the power supply module 10 outputs a power signal of the corresponding type to power the test pieces 401 connected to that test channel. The cathodic protection data acquisition instrument 400 generates a response signal to the input power signal based on the energization status of each energized test piece 401 and transmits it to the control module 30. The control module 30 determines whether the response signal is within a preset range, and thus determines whether the test function is qualified. Furthermore, for test functions corresponding to multiple test channels, after completing the testing of one test channel, the control module 30 can control the power signal corresponding to that test channel to stop input and control the next test channel to be activated before resuming testing, until all tests for that test function are completed. After completing one test function, the test channel can be switched to perform the next test function. The control module 30 controls the power supply module 10 to output the corresponding type of power signal until all test functions of the cathodic protection data acquisition instrument 400 are completed.

[0071] Understandably, the above testing process is automatically executed by the control module 30, requiring no subsequent manual plugging, unplugging, or adjustment. This allows for the complete testing of all functions of the cathode ray tube data acquisition instrument 400 through this testing system, thereby improving the testing efficiency of the cathode ray tube data acquisition instrument 400. Furthermore, when each test piece 401 is connected to its corresponding output channel 22, only the test pieces 401 corresponding to the connected test channel are powered, without affecting other test pieces 401.

[0072] Understandably, the initial / default states of each input path 21 and output path 22 are disconnected.

[0073] The technical solution of this invention, through the setting of a cathodic protection data acquisition instrument testing system, includes a power supply module 10, a channel switching module 20, and a control module 30. The power supply module 10 is configured to output different types of power signals through different power output terminals. The channel switching module 20 includes multiple input paths 21 and multiple output paths 22, and each of the multiple output paths 22 is configured with different test functions. When testing the cathodic protection data acquisition instrument 400, the control module 30 first turns on the test channel corresponding to the test function to be tested, so as to connect the test path between the power supply module 10 and each test piece 401 connected to the output path 22 in the test channel. The control module 30 controls the power supply module 10 to output the corresponding type of power signal to power each test piece connected to the output path 22. The control module 30 controls each test channel corresponding to each test function to be tested to turn on, so as to complete the testing of each test function of the cathodic protection data acquisition instrument 400. Then, the control module 30 receives the response signals of each test piece 401 to the power signal collected by the cathodic protection data acquisition instrument to determine whether the test function is qualified. In summary, because this testing system is equipped with multiple power output terminals, multiple input paths, and multiple output paths, and is configured with corresponding test channels for each test function, it can quickly complete the testing of multiple test functions of the cathodic protection data acquisition instrument by automatically controlling the switching of test channels and the output of power signals through the control module. There is no need for manual switching of channels or adjustment of power supply, which can shorten the testing time and thus improve the testing efficiency.

[0074] Figure 2 This is a schematic diagram of another cathodic protection data acquisition instrument detection system provided in an embodiment of the present invention. See also: Figure 2 Based on the above embodiments, optionally, the transmission bus includes a first bus L1 and a second bus L2, any power output terminal includes a first terminal J1 and a second terminal J2, any input path 21 includes a first switch S1 and a second switch S2, and any output path 22 includes a third switch S3 and a fourth switch S4.

[0075] For the corresponding power output and input paths: the first terminal of the first switch S1 is connected to the first terminal J1, the first terminal of the second switch S2 is connected to the second terminal J2, the second terminal of the first switch S1 is connected to the first bus L1, and the second terminal of the second switch S2 is connected to the second bus L2. For any output path: the first terminal of the third switch S3 is connected to the first bus L1, the first terminal of the fourth switch S4 is connected to the second bus L2, and the second terminals of the third switch S3 and the fourth switch S4 are respectively connected to different test pieces corresponding to the test functions configured for the output path.

[0076] Among them, the first switch S1, the second switch S2, the third switch S3 and the fourth switch S4 are all controllable switching devices, such as relays or analog switches.

[0077] By setting the first switch S1, the second switch S2, the third switch S3, and the fourth switch S4, the on / off control of each input path 21 and each output path 22 can be realized, and different test channels are isolated, avoiding mutual interference between different test functions and ensuring the safety and reliability of the testing process. It can be understood that controlling the input path 21 to be on includes controlling both the first switch S1 and the second switch S2 in that input path 21 to be on, and controlling the input path 21 to be off includes controlling at least one of the first switch S1 and the second switch S2 in that input path to be off. Controlling the output path 22 to be on includes controlling both the third switch S3 and the fourth switch S4 in that output path 22 to be on, and controlling the output path 22 to be off includes controlling at least one of the third switch S3 and the fourth switch S4 in that output path 22 to be off.

[0078] Optionally, the acquisition cable includes six test pieces: a polarization test piece 411, a reference test piece 412, a corrosion test piece 413, a current test piece 414, an anode test piece 415, and a pipe test piece 416. Multiple output paths include: a first output path 221, a second output path 222, a third output path 223, a fourth output path 224, a fifth output path 225, a sixth output path 226, a seventh output path 227, and an eighth output path 228.

[0079] The first output path 221 is configured with an on-state potential test function. The second terminal of the third switch S3 in the first output path 221 is connected to the polarization test piece 411, and the second terminal of the fourth switch S4 in the first output path 221 is connected to the reference test piece 413. The on-state potential is the pipe-to-ground potential measured when the cathodic protection system is put into use.

[0080] The second output channel 222 is configured with a power-off potential test function. The second terminal of the third switch S3 in the second output channel 222 is connected to the polarized test piece 411, and the second terminal of the fourth switch S4 in the second output channel is connected to the reference test piece 412. The power-off potential is the instantaneous power-off potential measured when the test piece is disconnected from the pipeline for a certain period of time. Alternatively, it can be the potential measured instantaneously after a short delay following a short interruption of the loop current, to test the potential without IR drop (voltage drop in the soil).

[0081] The third output path 223 is configured with a pipe-to-ground AC potential testing function. The second terminal of the third switch S3 in the third output path 223 is connected to the polarization test piece 411, and the second terminal of the fourth switch S4 in the third output path is connected to the reference test piece 412. The pipe-to-ground AC potential is the AC interference voltage experienced by the pipe.

[0082] The fourth output path 224 is configured with a natural corrosion potential testing function. The second terminal of the third switch S3 in the fourth output path is connected to the corrosion test piece 413, and the second terminal of the fourth switch S4 in the fourth output path 224 is connected to the reference test piece 412. The natural corrosion potential is the stable potential obtained after a metal pipe or corrosion piece has been buried in the soil for a period of time.

[0083] The fifth output path 225 is configured with a test piece AC current testing function. The second terminal of the third switch S3 in the fifth output path 225 is connected to the current test piece 414 and the anode test piece 415, and the second terminal of the fourth switch S4 in the fifth output path 225 is connected to the pipe test piece 416. The test piece AC current is the amount of AC current received by the polarized test piece 411.

[0084] The sixth output path 226 is configured with a test piece DC current testing function. The second terminal of the third switch S3 in the sixth output path 226 is connected to the current test piece 414 and the anode test piece 415, and the second terminal of the fourth switch S4 in the sixth output path 226 is connected to the pipe test piece 416. The test piece DC current is the amount of DC current received by the polarized test piece 411.

[0085] The seventh output path 227 is configured with a magnesium foil current testing function. The second terminal of the third switch S3 in the seventh output path 227 is connected to the anode test piece 415, and the second terminal of the fourth switch S4 in the seventh output path 227 is connected to the pipe test piece 416. The magnesium foil current is the current flowing out of the anode (metal) when magnesium metal is used as the anode.

[0086] The eighth output path 228 is configured with a magnesium anode open-circuit voltage test function. The second terminal of the third switch S3 in the eighth output path 228 is connected to the anode test piece 415, and the second terminal of the fourth switch S4 in the eighth output path 228 is connected to the reference test piece 412. The magnesium anode open-circuit voltage is the open-circuit potential when the magnesium anode is not connected to a pipe.

[0087] Among them, the on-state potential test function, the off-state potential test function, the natural corrosion potential test function, and the magnesium cladding open-circuit voltage test function require DC voltage; the test piece DC current test function and the magnesium cladding current test function require DC current; the pipe-to-ground AC potential test function requires AC voltage; and the test piece AC current test function requires AC current. For example, the second terminal of the third switch S3 serves as the positive output terminal of the output path, and the second terminal of the fourth switch S4 serves as the negative output terminal of the output path.

[0088] Accordingly, the power supply module 10 can be configured to include: five power output terminals, a DC power supply 101 and an AC power supply 102.

[0089] Specifically, the five power output terminals are designated as a first power output terminal 11, a second power output terminal 12, a third power output terminal 13, a fourth power output terminal 14, and a fifth power output terminal 15. A DC power supply 101 is connected to the first power output terminal 11, the second power output terminal 12, and the third power output terminal 13. The DC power supply 101 outputs a first DC voltage signal or a first DC current signal through the first power output terminal 11, a second DC voltage signal through the second power output terminal 12, and a second DC current signal through the third power output terminal 13. The absolute value of the voltage of the first DC voltage signal is lower than the absolute value of the voltage of the second DC voltage signal, and the absolute value of the current of the first DC current signal is lower than the absolute value of the current of the second DC current signal. In other words, the first power output terminal 11 is used to output a low DC voltage or a small DC current, the second power output terminal 12 is used to output a high DC voltage, and the third power output terminal 13 is used to output a large DC current. For example, the DC power supply 101 can be a DC standard source. The AC power supply 102 is connected to the fourth power output terminal 14 and the fifth power output terminal 15, respectively. The fourth power output terminal 14 is used to output an AC voltage signal, and the fifth power output terminal 15 is used to output an AC current signal. For example, the AC power supply 102 can be an AC standard source.

[0090] Accordingly, the multiple input paths include five input paths, namely the first input path 211, the second input path 212, the third input path 213, the fourth input path 214 and the fifth input path 215, which are respectively connected to the first power output terminal 11, the second power output terminal 12, the third power output terminal 13, the fourth power output terminal 14 and the fifth power output terminal 15.

[0091] Specifically, when the test function to be tested is the power-on potential test function, the first test channel and the second test channel are controlled to be turned on in a time-division manner. When the first test channel is turned on, the first power output terminal 11 is controlled to output a first voltage value of a first DC voltage signal. When the second test channel is turned on, the second power output terminal 12 is controlled to output a second voltage value and a third voltage value of a second DC voltage signal in a time-division manner. For example, the first voltage value can be -0.85V, the second voltage value can be -25V, and the third voltage value can be 25V. The first input path 211 and the first output path 221 constitute the first test channel, and the second input path 212 and the first output path 221 constitute the second test channel.

[0092] When the test function to be tested is the power-off potential test function, the third test channel and the fourth test channel are turned on in a time-division manner. When the third test channel is turned on, the first power output terminal 11 is controlled to output the first voltage value of the first DC voltage signal. When the fourth test channel is turned on, the second power output terminal 12 is controlled to output the second voltage value and the third voltage value of the second DC voltage signal in a time-division manner. The first input path 211 and the second output path 222 constitute the third test channel, and the second input path 212 and the second output path 222 constitute the fourth test channel.

[0093] When the test function to be tested is the AC potential test function for the pipe to ground, the fifth test channel is controlled in a time-division manner. Specifically, when the fifth test channel is on, the fourth power output terminal 14 is controlled to output AC voltage signals with amplitudes of a fourth, fifth, and sixth voltage value in a time-division manner. For example, the amplitude of the fourth voltage value can be 0.85V, the amplitude of the fifth voltage value can be 10V, and the amplitude of the sixth voltage value can be 18V. The fourth input path 214 and the third output path 223 constitute the fifth test channel.

[0094] When the test function to be tested is the natural corrosion potential test function, the sixth test channel and the seventh test channel are turned on in a time-division manner; wherein, when the sixth test channel is turned on, the first power output terminal 11 is controlled to output the first voltage value of the first DC voltage signal; when the seventh test channel is turned on, the second power output terminal 12 is controlled to output the second voltage value and the third voltage value of the second DC voltage signal in a time-division manner; wherein, the first input path 211 and the fourth output path 224 constitute the sixth test channel, and the second input path 212 and the fourth output path 224 constitute the seventh test channel.

[0095] When the test function to be tested is the AC current test function of the test piece, the eighth test channel is controlled in a time-division manner. Specifically, when the eighth test channel is turned on, the fifth power output terminal is controlled to output AC current signals with amplitudes of a first current value, a second current value, and a third current value in a time-division manner. For example, the amplitude of the first current value can be 12mA, the amplitude of the second current value can be 20mA, and the amplitude of the third current value can be 30mA. The fifth input path 215 and the fifth output path 225 constitute the eighth test channel.

[0096] When the test function to be tested is the DC current test function of the test piece, the ninth and tenth test channels are turned on in a time-division manner. Specifically, when the ninth test channel is turned on, the first power output terminal 11 is controlled to output the fourth current value of the first DC current signal; when the tenth test channel is turned on, the third power output terminal 13 is controlled to output the fifth and sixth current values ​​of the second DC current signal in a time-division manner. For example, the fourth current value can be 12mA, the fifth current value can be -45mA, and the sixth current value can be 45mA. The first input path 211 and the sixth output path 226 constitute the ninth test channel, and the third input path 213 and the sixth output path 226 constitute the tenth test channel.

[0097] When the test function to be tested is the magnesium package current test function, the eleventh and twelfth test channels are turned on in a time-division manner. Specifically, when the eleventh test channel is turned on, the first power output terminal 11 is controlled to output the seventh current value of the first DC voltage signal; when the twelfth test channel is turned on, the third power output terminal 13 is controlled to output the eighth and ninth current values ​​of the first DC current signal in a time-division manner. For example, the seventh current value can be -20mA, the eighth current value can be -450mA, and the ninth current value can be 450mA. The first input path 211 and the seventh output path 227 constitute the eleventh test channel, and the third input path 213 and the seventh output path 227 constitute the twelfth test channel.

[0098] When the test function to be tested is the magnesium foil open-circuit voltage test function, the thirteenth test channel and the fourteenth test channel are turned on in a time-division manner. When the thirteenth test channel is turned on, the first power output terminal 11 is controlled to output the first voltage value of the first DC voltage signal. When the fourteenth test channel is turned on, the second power output terminal 12 is controlled to output the second voltage value and the third voltage value of the second DC voltage signal in a time-division manner. The first input path 211 and the eighth output path 228 constitute the thirteenth test channel, and the second input path 212 and the eighth output path 228 constitute the fourteenth test channel.

[0099] By setting different power supply signals for each test function, it can be ensured that each test function is tested within the full range, thus guaranteeing the accuracy of the test results.

[0100] By configuring the power supply module 10, which includes a DC power supply 101 and an AC power supply 102, and configuring different power output terminals to output different types of power signals, the current and voltage requirements of various test functions of the cathode data acquisition instrument 400 can be met. Furthermore, the control module 30 controls the power supply module 10 to ensure that the power signals output by the power supply module 10 match the test function. This reduces losses caused by plugging and unplugging of physical components such as connectors and solves the problems of single input and unintelligent input-output matching in existing solutions. Moreover, the power supply module 10 can output different types of power signals to adapt to the needs of different test functions, enabling the system to be used for testing various types of cathode data acquisition instruments and improving the versatility of the testing system.

[0101] In summary, the cathodic protection data acquisition instrument detection system provided by this invention can efficiently solve the power supply problem of multiple power sources (specific voltage, specific current), and through a unified control process, effectively simplify the switching operation of different power sources, improve overall efficiency, and ensure accuracy.

[0102] It is understandable that, since the cathode data acquisition instrument 400 is tested using the cathode data acquisition instrument testing system provided by this invention, the number of operation steps can be reduced compared to manual testing.

[0103] For example, Figure 3 For the timing diagram of manual testing of the cathode ray tube data acquisition instrument, please refer to [link / reference]. Figure 3 When manually testing the cathodic protection data acquisition device (CPAD), the operator needs to perform five operations for each potential. That is, the operator connects the power supply module (DC standard source and AC standard source), connects the CPAD, sets the parameters of the CPAD, adjusts the potential of the power supply module, and acquires the potential data of the CPAD; then the CPAD feeds back the potential data to the operator as shown by the dashed arrow.

[0104] Figure 4 For the timing diagram of the automatic detection of the cathode ray tube data acquisition instrument, please refer to [link / reference]. Figure 4When automatically testing the cathodic protection data acquisition unit (CPU), the operator only needs to connect the channel switching module. Specifically, this involves connecting the channel switching module to the control module, and the CPU to the power supply module, and informing the control module to start the test. The control module then automatically controls the testing process for each function. Specifically, the control module controls the channel switching module to switch channels; the control module sets the parameters for the CPU; the CPU feeds back the settings to the control module; the control module controls the power supply module to adjust the potential; the control module acquires the potential data collected by the CPU; and the CPU feeds back the potential data to the control module. In other words, the simplified operation steps are: the operator connects the power supply module, the CPU, and the control module; the operator clicks "start" in the control module's software, causing the software program to switch to the corresponding channel based on the potential configuration; the control module sets the relevant parameters for the CPU; and the control module controls the power supply module to adjust to the corresponding potential and acquire the test results. Therefore, regardless of the number of potentials tested, the operator only needs to perform the operation once, simplifying the process and improving testing efficiency.

[0105] In summary, the core of the cathodic protection data acquisition system consists of a control module and a channel switching module, requiring only one wiring operation from the operator. Both the power module and the cathodic protection data acquisition unit are connected to the channel switching module. The control module switches the test channels (corresponding input and output channels) according to preset configurations, thus achieving many-to-many switching between inputs and outputs.

[0106] In other embodiments, the control module may be, for example, a computer, and the channel switching module may be, for example, a plurality of matrix switch arrays.

[0107] This invention also provides a method for testing a cathode ray tube data acquisition instrument, which is applied to the cathode ray tube data acquisition instrument testing system provided in any of the above embodiments, and therefore has corresponding beneficial effects. Figure 5 This is a flowchart illustrating a method for testing a cathode ray tube (CRT) data acquisition instrument, as provided in an embodiment of the present invention. This CRT testing method is executed by a control module. (See also...) Figure 5 The detection methods for the cathode ray tube data acquisition instrument include:

[0108] S110. When the test piece corresponding to the test function to be tested in the cathodic protection data acquisition instrument is connected to the channel switching module, control the conduction of each test channel corresponding to the test function to be tested respectively; wherein, when any test channel is conducted, control the power supply module to output the corresponding type of power signal through the power output terminal connected to the conducted test channel, receive the response signal of the cathodic protection data acquisition instrument to the power signal, and determine whether the value of the response signal is within the preset range corresponding to the response signal.

[0109] The preset range is the acceptable range for product qualification. The preset range can be obtained based on experience or through testing of normal instruments.

[0110] S120. When the values ​​of each response signal are within their respective preset ranges, the test function to be tested is deemed qualified.

[0111] S130. When at least one response signal is outside its corresponding preset range, the test function to be tested is determined to be unqualified.

[0112] In this embodiment of the invention, when testing a cathodic protection data acquisition instrument, the control module first activates the test channel corresponding to the test function to be tested, thereby connecting the power supply module with the test pieces connected to the output path of the test channel. The control module controls the power supply module to output a power signal of the corresponding type to power the test pieces connected to the output channel. The control module controls the activation of each test channel corresponding to each test function to be tested, thereby completing the testing of each test function of the cathodic protection data acquisition instrument. Furthermore, the control module receives the response signals of each test piece to the power signal acquired by the cathodic protection data acquisition instrument, and determines whether the test function is qualified based on whether the value of the response signal is within the preset range corresponding to the response signal. In summary, since this testing system is equipped with multiple power output terminals, multiple input paths, and multiple output paths, and is configured with corresponding test channels for each test function, the control module automatically controls the switching of test channels and the output of power signals, enabling the rapid completion of multiple test function tests of the cathodic protection data acquisition instrument without the need for manual channel switching or power adjustment, thus shortening the testing time and improving testing efficiency.

[0113] Optionally, based on the above embodiments, the cathode-protected data acquisition instrument includes multiple test functions to be tested; the cathode-protected data acquisition instrument testing method further includes:

[0114] With all test pieces corresponding to the test functions to be tested in the cathode data acquisition instrument connected to the channel switching module, the test functions to be tested are performed sequentially according to the preset test order. The preset test order can be pre-stored in the control module.

[0115] The technical solution of this embodiment, by setting a preset test sequence, ensures that all test functions of the cathode ray tube data acquisition instrument are tested sequentially according to a predetermined logical order, without omitting any test step. This allows the test process to comprehensively cover all functional points that need to be tested, ensuring the completeness of the test. Furthermore, it avoids repeatedly testing certain functions, thereby improving testing efficiency. It also ensures that each test follows the same procedure, reducing test result deviations caused by human factors or random operations, and improving the repeatability and reliability of test results.

[0116] Optionally, based on the above embodiments, determining whether the cathode data acquisition instrument is qualified includes:

[0117] When all the tested functions pass the test, the cathodic protection data acquisition instrument is deemed qualified.

[0118] The cathodic protection data acquisition instrument is deemed unqualified if at least one of the test functions fails.

[0119] Specifically, when one of the test functions to be tested is found to be unqualified, the current test process can be terminated and the cathodic protection data acquisition instrument can be determined to be unqualified, which can improve the testing efficiency.

[0120] Alternatively, if at least one of the tested functions fails after testing all the functions to be tested, the cathodic protection data acquisition unit (CPU) is deemed unqualified. By testing all the tested functions one by one, it is possible to clearly identify which functions are qualified and which are unqualified. If at least one function fails, the problem can be narrowed down to a specific module or certain functions, allowing maintenance personnel to focus their attention precisely on that module without having to conduct a comprehensive inspection of the entire device, thus greatly improving maintenance efficiency. Furthermore, comprehensive testing ensures that all functions have been checked, and once a failure is found, it can be repaired, thereby ensuring the reliability of the CPU and improving its metrological accuracy.

[0121] Optionally, when any test channel is turned on, before the control power supply module outputs a corresponding type of power signal through the power output terminal connected to the turned-on test channel, the cathodic protection data acquisition instrument detection method further includes:

[0122] Configure the internal pathways of the cathode data acquisition instrument according to the test function to be tested.

[0123] Specifically, the cathode-symmetric data acquisition instrument (CSSA) can correspond to different internal paths when performing different acquisition functions. This configuration step is equivalent to controlling the activation of the acquisition channel in the CSA that corresponds to the current test function, so as to process the currently received power signal and generate a response signal. For example, for test functions corresponding to multiple test channels, the control module can also configure the internal path of the CSA in combination with the current test function and the currently activated test channel.

[0124] Based on the above embodiments, optionally, when controlling the conduction of any test channel, the cathodic protection data acquisition instrument detection method further includes:

[0125] All input and output paths of the test channel that is not connected are disconnected.

[0126] This is equivalent to controlling only the input and output paths of the test channel that needs to be activated, while shutting down all other input and output paths. This avoids signal interference from other paths and ensures the accuracy of the test results. Specifically, when any test channel is activated, the control module closes the first and second switches of the input path and the third and fourth switches of the output path in the corresponding test channel, while opening the first and second switches of the remaining input paths and the third and fourth switches of the remaining output paths.

[0127] Optionally, based on the above embodiments, when any test function to be tested requires testing based on different values ​​of a target type power signal, when the test channel corresponding to the target power output terminal of the target type power signal is turned on, the control power supply module outputs a power signal of the corresponding type through the power output terminal connected to the turned-on test channel, and receives the response signal of the cathode protection data acquisition instrument to the power signal, including:

[0128] The control power supply module outputs different values ​​of the target type power signal through the target power output terminal in a time-division manner, and receives the response signals of the cathodic protection data acquisition instrument for the different values ​​of the target type power signal.

[0129] The target power supply refers to a specific type of power signal source provided by the control power supply module to the device under test (such as a cathodic protection data acquisition instrument) to simulate or verify its working state.

[0130] Optionally, based on the above embodiments, the power supply module includes: a first power output terminal, a second power output terminal, a third power output terminal, a fourth power output terminal, and a fifth power output terminal; the first power output terminal is used to output a first DC voltage signal or a first DC current signal, the second power output terminal is used to output a second DC voltage signal, the third power output terminal is used to output a second DC current signal, the fourth power output terminal is used to output an AC voltage signal, and the fifth power output terminal is used to output an AC current signal.

[0131] When the test function to be tested is the power-on potential test function, the power-on potential test function needs to be tested based on the first voltage value of the first DC voltage signal, and the second and third voltage values ​​of the second DC voltage signal; wherein, the third voltage value is greater than the first voltage value, the first voltage value is greater than the second voltage value, and the second voltage value is opposite to the third voltage value and the absolute values ​​are equal.

[0132] When the test function to be tested is the power-off potential test function, the power-off potential test function needs to be tested based on the first voltage value of the first DC voltage signal, and the second and third voltage values ​​of the second DC voltage signal.

[0133] When the test function to be tested is the AC potential test function for the pipe to ground, the AC potential test function for the pipe to ground needs to be tested based on AC voltage signals with amplitudes of the fourth voltage value, the fifth voltage value and the sixth voltage value respectively; among them, the amplitude of the sixth voltage value is greater than the amplitude of the fifth voltage value, and the amplitude of the fifth voltage value is greater than the amplitude of the fourth voltage value.

[0134] When the test function to be tested is the natural corrosion potential test function, the natural corrosion potential test function needs to be tested based on the first voltage value of the first DC voltage signal, and the second and third voltage values ​​of the second DC voltage signal;

[0135] When the test function to be tested is the AC current test function of the test piece, the AC current test function of the test piece requires AC current signals with amplitudes of a first current value, a second current value and a third current value to be tested; wherein, the amplitude of the third current value is greater than the amplitude of the second current value, and the amplitude of the second current value is greater than the amplitude of the first current value.

[0136] When the test function to be tested is the DC current test function of the test piece, the DC current test function of the test piece needs to be tested based on the fourth current value of the first DC current signal, and the fifth and sixth current values ​​of the second DC current signal; wherein, the sixth current value is greater than the fourth current value, the fourth current value is greater than the fifth current value, and the sixth current value is opposite to the fifth voltage value and the absolute value is equal.

[0137] When the test function to be tested is the magnesium bag current test function, the magnesium bag current test function needs to be tested based on the seventh current value of the first DC voltage signal, and the eighth and ninth current values ​​of the second DC current signal; wherein, the ninth current value is greater than the seventh current value, the seventh current value is greater than the eighth current value, and the ninth current value is opposite to the eighth current value and the absolute value is equal.

[0138] When the test function to be tested is the magnesium foil open-circuit voltage test function, the magnesium foil open-circuit voltage test function needs to be tested based on the first voltage value of the first DC voltage signal, and the second and third voltage values ​​of the second DC voltage signal.

[0139] It should be noted that in the various embodiments of the detection system, some specific descriptions are given for different detection methods. For any content not described in detail here, please refer to the explanations of the above embodiments. Repeated content will not be repeated here.

[0140] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0141] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A negative data acquisition instrument detection system, comprising: The negative protection data acquisition instrument comprises a collection cable, the collection cable comprising a plurality of test pieces; The negative protection data acquisition instrument detection system comprises: A power supply module comprising a plurality of power output terminals; the power supply module outputs different types of power signals through different power output terminals; A channel switching module comprising a transmission bus, a plurality of input channels and a plurality of output channels; the plurality of input channels and the plurality of output channels are connected to the transmission bus; the plurality of input channels are connected to the plurality of power output terminals one by one; the plurality of output channels are respectively configured with different test functions, and each output channel is connected to the test piece corresponding to the configured test function; wherein any output channel and any input channel form a test channel, and each test function corresponds to at least one test channel; A control module in communication connection with the power supply module, the channel switching module and the negative protection data acquisition instrument; the control module is used to control the conduction of each test channel corresponding to the test function to be tested according to the test function to be tested of the negative protection data acquisition instrument; wherein when any test channel is conducted, the control module is used to control the power supply module to output the corresponding type of power signal through the power output terminal connected to the conducted test channel, and to judge whether the test function to be tested is qualified according to the response signal of the negative protection data acquisition instrument to the power signal.

2. The negative data acquisition instrument detection system of claim 1, wherein, The transmission bus comprises a first bus and a second bus, the power output terminal comprises a first terminal and a second terminal, the input channel comprises a first switch and a second switch, and the output channel comprises a third switch and a fourth switch; For the corresponding connection of the power output terminal and the input channel: the first end of the first switch is connected to the first terminal, the first end of the second switch is connected to the second terminal, the second end of the first switch is connected to the first bus, and the second end of the second switch is connected to the second bus; For any output channel: the first end of the third switch is connected to the first bus, the first end of the fourth switch is connected to the second bus, and the second end of the third switch and the second end of the fourth switch are respectively connected to different test pieces corresponding to the test function configured by the output channel.

3. The negative data acquisition instrument detection system of claim 2, wherein, The collection cable comprises six test pieces, which are polarization test pieces, reference test pieces, corrosion test pieces, current test pieces, anode test pieces and pipeline test pieces; The plurality of output channels comprise: A first output channel; the first output channel is configured with a power-on potential test function, the second end of the third switch in the first output channel is connected to the polarization test piece, and the second end of the fourth switch in the first output channel is connected to the reference test piece; A second output channel; the second output channel is configured with a power-off potential test function, the second end of the third switch in the second output channel is connected to the polarization test piece, and the second end of the fourth switch in the second output channel is connected to the reference test piece; A third output channel; the third output channel is configured with an AC potential test function, a second end of the third switch in the third output channel is connected to the polarization test piece, and a second end of the fourth switch in the third output channel is connected to the reference test piece; A fourth output channel; the fourth output channel is configured with a natural corrosion potential test function, a second end of the third switch in the fourth output channel is connected to the corrosion test piece, and a second end of the fourth switch in the fourth output channel is connected to the reference test piece; A fifth output channel; the fifth output channel is configured with a test piece AC current test function, a second end of the third switch in the fifth output channel is connected to the current test piece and the anode test piece, and a second end of the fourth switch in the fifth output channel is connected to the pipeline test piece; A sixth output channel; the sixth output channel is configured with a test piece DC current test function, a second end of the third switch in the sixth output channel is connected to the current test piece and the anode test piece, and a second end of the fourth switch in the sixth output channel is connected to the pipeline test piece; A seventh output channel; the seventh output channel is configured with a magnesium package current test function, a second end of the third switch in the seventh output channel is connected to the anode test piece, and a second end of the fourth switch in the seventh output channel is connected to the pipeline test piece; An eighth output channel; the eighth output channel is configured with a magnesium package open circuit voltage test function, a second end of the third switch in the eighth output channel is connected to the anode test piece, and a second end of the fourth switch in the eighth output channel is connected to the reference test piece.

4. The negative data acquisition instrument detection system of claim 1, wherein, The power supply module comprises: Five power supply output terminals, respectively a first power supply output terminal, a second power supply output terminal, a third power supply output terminal, a fourth power supply output terminal, and a fifth power supply output terminal; A DC power supply is connected to the first power supply output terminal, the second power supply output terminal, and the third power supply output terminal; the DC power supply outputs a first DC voltage signal or a first DC current signal through the first power supply output terminal, outputs a second DC voltage signal through the second power supply output terminal, and outputs a second DC current signal through the third power supply output terminal; wherein the absolute value of the voltage of the first DC voltage signal is lower than the absolute value of the voltage of the second DC voltage signal, and the absolute value of the current of the first DC current signal is lower than the absolute value of the current of the second DC current signal; An AC power supply is connected to the fourth power supply output terminal and the fifth power supply output terminal, the fourth power supply output terminal is used to output an AC voltage signal, and the fifth power supply output terminal is used to output an AC current signal.

5. A method for detecting a cathode ray tube data acquisition instrument, characterized in that, The application is applied to the negative data acquisition instrument detection system of any one of claims 1-4, and is executed by the control module; The method comprises: In the case that the test pieces corresponding to the test functions to be tested in the negative data acquisition instrument are connected with the channel switching module, each test channel corresponding to the test functions to be tested is controlled to be conducted; wherein, when any test channel is conducted, the power supply module is controlled to output the corresponding type of power signal through the power output end of the test channel connected with the conducted test channel, the response signal of the power supply signal received by the negative data acquisition instrument is received, and it is judged whether the value of the response signal is within the preset range corresponding to the response signal; When the values of all the response signals are within the preset ranges corresponding to themselves, it is determined that the test functions to be tested are qualified; When at least one response signal is outside the preset range corresponding to itself, it is determined that the test functions to be tested are unqualified.

6. The method of claim 5, wherein the data acquisition instrument is a negative pressure data acquisition instrument. The negative data acquisition instrument includes a plurality of test functions to be tested; the method further comprises: In the case that all the test pieces corresponding to the test functions to be tested in the negative data acquisition instrument are connected with the channel switching module, each test function to be tested is tested in turn according to a preset test order.

7. The negative data acquisition instrument detection method according to claim 6, wherein, When all the test functions to be tested are qualified, it is determined that the negative data acquisition instrument is qualified; When it is detected that one of the test functions to be tested is unqualified, the current test process is ended, and it is determined that the negative data acquisition instrument is unqualified; or, when all the test functions to be tested are tested, if there is at least one test function to be tested that is unqualified, it is determined that the negative data acquisition instrument is unqualified.

8. The method of claim 5, wherein the data acquisition instrument is a negative pressure data acquisition instrument. In the case that any test channel is conducted, before the power supply module is controlled to output the corresponding type of power signal through the power output end of the test channel connected with the conducted test channel, the method further comprises: According to the test functions to be tested, the internal paths of the negative data acquisition instrument are configured; In the case that any test channel is conducted, before the power supply module is controlled to output the corresponding type of power signal through the power output end of the test channel connected with the conducted test channel, the method further comprises: In the case that any test channel is conducted, before the power supply module is controlled to output the corresponding type of power signal through the power output end of the test channel connected with the conducted test channel, the method further comprises:

9. The method of claim 5, wherein the data acquisition instrument is a negative pressure data acquisition instrument. In the case that any test channel is conducted, before the power supply module is controlled to output the corresponding type of power signal through the power output end of the test channel connected with the conducted test channel, the method further comprises: In the case that any test channel is conducted, before the power supply module is controlled to output the corresponding type of power signal through the power output end of the test channel connected with the conducted test channel, the method further comprises:

10. The method of claim 5, wherein the data acquisition instrument is a negative pressure data acquisition instrument. The power supply module comprises a first power output end, a second power output end, a third power output end, a fourth power output end and a fifth power output end; the first power output end is used for outputting a first direct current voltage signal or a first direct current signal, the second power output end is used for outputting a second direct current voltage signal, the third power output end is used for outputting a second direct current signal, the fourth power output end is used for outputting an alternating current voltage signal, and the fifth power output end is used for outputting an alternating current signal; When the test function to be tested is a power-on potential test function, the power-on potential test function needs to be tested based on a first voltage value of the first direct current voltage signal, and second and third voltage values of the second direct current voltage signal; wherein the third voltage value is greater than the first voltage value, the first voltage value is greater than the second voltage value, the second voltage value and the third voltage value are opposite and equal in absolute value; When the test function to be tested is a power-off potential test function, the power-off potential test function needs to be tested based on a first voltage value of the first direct current voltage signal, and second and third voltage values of the second direct current voltage signal; When the test function to be tested is a tube-to-ground alternating current potential test function, the tube-to-ground alternating current potential test function needs to be tested based on the alternating current voltage signal with fourth, fifth and sixth voltage values in amplitude; wherein the sixth voltage value is greater in amplitude than the fifth voltage value, and the fifth voltage value is greater in amplitude than the fourth voltage value; When the test function to be tested is a natural corrosion potential test function, the natural corrosion potential test function needs to be tested based on a first voltage value of the first direct current voltage signal, and second and third voltage values of the second direct current voltage signal; When the test function to be tested is a test piece alternating current test function, the test piece alternating current test function needs to be tested based on the alternating current signal with first, second and third current values in amplitude; wherein the third current value is greater in amplitude than the second current value, and the second current value is greater in amplitude than the first current value; When the test function to be tested is a test piece direct current test function, the test piece direct current test function needs to be tested based on a fourth current value of the first direct current signal, and fifth and sixth current values of the second direct current signal; wherein the sixth current value is greater than the fourth current value, the fourth current value is greater than the fifth current value, and the sixth current value and the fifth voltage value are opposite and equal in absolute value; When the test function to be tested is a magnesium package current test function, the magnesium package current test function needs to be tested based on a seventh current value of the first direct current voltage signal, and an eighth current value and a ninth current value of the second direct current signal; wherein the ninth current value is greater than the seventh current value, the seventh current value is greater than the eighth current value, the ninth current value is opposite to the eighth current value and the absolute values are equal; When the test function to be tested is a magnesium package open circuit voltage test function, the magnesium package open circuit voltage test function needs to be tested based on a first voltage value of the first direct current voltage signal, and a second voltage value and a third voltage value of the second direct current voltage signal.

Images