Intrinsic safety power supply transient energy testing device and method

Abstract

The application provides an intrinsic safety power transient energy testing device and method, and relates to the technical field of intrinsic safety power. The device comprises a load module, a control unit, a control terminal and a detection unit. The load module has at least one load, and each load has a plurality of load units. The control unit is connected with the load module through an adaptive interface module, and is used for selecting the connected load unit. The control terminal is connected with the control unit through a communication interface, selects a load unit mapping figure through a graphical user interface, and further selects the corresponding load unit through the control unit, so as to load the selected load unit to the measured intrinsic safety power. The detection unit is used for connecting and detecting the measured intrinsic safety power loaded with the selected load unit, and is connected with the control terminal to upload the detection result to the control terminal. The device changes the test environment by selecting different loads, so that the test of the intrinsic safety power transient energy is more comprehensive.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of intrinsic safety power supply, and in particular to an intrinsic safety power supply transient energy testing device and method. BACKGROUND

[0002] Intrinsic safety power supply (referred to as intrinsic safety power supply) is widely used in dangerous environments such as coal mines and chemical industries where flammable and explosive gases or dust exist, and is executed in accordance with GB 3836.18-2010 Explosive Atmospheres Part 18: Intrinsic Safety Systems and GB 3836.1-2010 Explosive Atmospheres Part 1: General Requirements for Equipment. Accurate determination of the transient energy of the intrinsic safety power supply is crucial for ensuring the safe operation of the equipment and preventing electrical sparks from causing explosions and other accidents.

[0003] At present, the existing intrinsic safety power supply transient energy testing device has many shortcomings: most intrinsic safety power supply transient energy testing devices can only perform simple tests on single types of electronic components (such as resistors, capacitors, etc.), cannot simulate the complex situation of multiple electronic components combined under actual working conditions, and cannot accurately measure the transient energy of the intrinsic safety power supply; there is a lack of effective anti-misoperation mechanism during operation, which can lead to inaccurate test results due to the selection of electronic component parameters by the operator, and even may cause safety accidents. SUMMARY

[0004] The technical problem to be solved by the present application is to provide an intrinsic safety power supply transient energy testing device to solve the above-mentioned problems of the prior art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present application is: on the one hand, the present application provides an intrinsic safety power supply transient energy testing device, which comprises a load module, a control unit, a control terminal and a detection unit;

[0006] The load module has at least one load, each load has a plurality of load units, and the load units included in the same load are different in size;

[0007] The control unit is connected to the load module through an appropriate interface module for selecting the load unit, and when one load unit of a load is selected, the selection of the remaining load units included in the same load is invalid;

[0008] The control terminal is connected to the control unit through a communication interface and has a graphical user interface, and the load unit mapping graph is selected through the graphical user interface, and the corresponding load unit is further selected through the control unit, and then the selected load unit is loaded into the intrinsic safety power supply to be tested through the control unit;

[0009] The detection unit is used for connecting and detecting the measured intrinsically safe power supply loaded with the selected load unit, and connecting the control terminal to upload the detection result to the control terminal.

[0010] Further, the load module includes at least two loads of resistance, inductance and capacitance according to load types.

[0011] Further, the load module further includes a voltage stabilizing diode according to load types.

[0012] Further, the number of load units of each load in the load module is not less than five and not more than twenty.

[0013] Further, if the selected load of the control unit includes a capacitor, the control unit is adapted with a discharge circuit of the capacitor to discharge the selected capacitor in the current test after the current test is completed.

[0014] Further, each load in the load module forms a load sub-module.

[0015] A switching circuit is provided for switching between series and parallel connection of the load sub-modules, and the switching between series and parallel connection of the load sub-modules is realized based on a relay.

[0016] Further, each load sub-module is adapted with a circuit board.

[0017] Further, the device further includes a power module to convert commercial power into experimental power.

[0018] The power module and the control unit are integrated into a main control board, and the main control board communicates with the control terminal through an RS485 interface.

[0019] On the other hand, the application further provides an intrinsically safe power supply transient energy test method, comprising:

[0020] 1) connecting the intrinsically safe power supply to be tested on the reserved terminal of the main control board of the intrinsically safe power supply transient test device;

[0021] 2) selecting the load unit for the current test through the control terminal and starting the test;

[0022] 3) uploading the current detection data of the intrinsically safe power supply to be tested to the control terminal by the detection unit, and ending the current test;

[0023] 4) repeating steps 2) and 3) until all the predetermined test items are tested;

[0024] Wherein each load can only be selected one load unit in one test.

[0025] Further, each load corresponds to a cancel option in the graphical user interface of the control terminal or all loads correspond to a cancel option, so that when the load unit is selected incorrectly, the currently selected load unit is cancelled through the cancel option first, and then the target load unit is selected;

[0026] The load unit for configuring the test environment is configured as a load module, the load module has at least one load, and each load has a plurality of load units;

[0027] Further, different load units or combinations of different load units are sequentially selected to test the intrinsically safe power supply, so that various working conditions of the intrinsically safe power supply can be comprehensively tested.

[0028] The beneficial effects generated by the above technical scheme are that the intrinsically safe power supply transient energy testing device and method provided by the application can solve the problems that the conventional intrinsically safe power supply testing device can only test one kind of load, mainly the detection under the condition that a resistor is connected to the tested circuit, and there is only one resistor or the resistor is replaced for the next cycle of detection, the efficiency is low, and the frequent wiring also affects the service life of the terminal. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 The circuit principle block diagram of the intrinsically safe power supply transient energy testing device provided by the embodiment of the application is provided;

[0030] Figure 2 The circuit principle diagram of the main control board provided by the embodiment of the application is provided, wherein (a) is a shock circuit, (b) is a reset circuit, (c) is a start control circuit, (d) is a 485 communication circuit, (e) is a main control single-chip microcomputer circuit, (f) is a decoupling circuit, (g) is an indicator light circuit, and (h) is a power conversion circuit;

[0031] Figure 3 The pin definition of the single-chip microcomputer provided by the embodiment of the application is provided;

[0032] Figure 4 The interface module pin definition of each load module provided by the embodiment of the application is provided, wherein (a) is the interface module U5 of the resistor plate and the single-chip microcomputer U1, (b) is the interface module U6 of the capacitor plate and the single-chip microcomputer U1, (c) is the interface module U8 of the diode plate and the single-chip microcomputer U1, (d) is the interface module U9 of the inductor plate and the single-chip microcomputer U1, and (e) is the interface module U9 for driving the intrinsically safe connection and the resistance-capacitance tube series-parallel switching;

[0033] Figure 5The schematic diagram of each load configuration displayed by force control software on the host computer (industrial computer) provided by the embodiment of the present application is shown.

[0034] Figure 6 The circuit schematic diagram of the resistance board provided by the embodiment of the present application is shown.

[0035] Figure 7 The interface module circuit schematic diagram (P1 is default) of the resistance board provided by the embodiment of the present application is shown, wherein (a) is a storage register U11, (b) is a transistor array integrated circuit U12, (c) is a buffer U14, (d) is a transistor array integrated circuit U13, and (e) is an interface module U5 of the resistance board and the single-chip microcomputer U1.

[0036] Figure 8 The circuit schematic diagram of one resistance unit provided by the embodiment of the present application is shown.

[0037] Figure 9 The series-parallel switching circuit schematic diagram provided by the embodiment of the present application is shown, wherein (a) is a relay K3, (b) is a relay K4, (c) is a resistance unit, (d) is U10 for connecting a power module, (e) is a relay K2, (f) is a resistance load interface PR1, (g) is a capacitor load interface PC1, (h) is a voltage stabilizing diode load interface PD1, and (i) is an inductor load interface PL1. DETAILED DESCRIPTION

[0038] The principle and specific implementation of the present application are described below in combination with the drawings of the specification, and it should be known that the components and the like used in the specific examples are only some examples for describing the principle of the present application, and do not mean the only choice of the present application. For example, the single-chip microcomputer U1 with the model number STM32F103C8T6 used can also select other single-chip microcomputers or controllers and the like logical control devices. And for example, the industrial computer, as the host computer, is obviously not limited to a dedicated industrial computer, but can also be a personal PC, and does not affect the processing of related data and the configuration of the running environment of the force control software.

[0039] Regarding the intrinsic safety power supply, also known as the intrinsic safety circuit, in full name, the intrinsic safety circuit, simply speaking, it is a power supply, and the test is to take the intrinsic safety power supply as the power supply, and configure the load to simulate the actual working condition to test the performance of the intrinsic safety power supply. In the embodiment of the present application, a rich test environment is provided for the test of the intrinsic safety power supply, and multiple loads are configured, and each load has multiple load units, so that there are relatively more test configurations during the test.

[0040] In the embodiment, an intrinsic safety power supply transient energy test device comprises:

[0041] The load module has at least one kind of load, each kind of load has a plurality of load units, and the load units included in the same kind of load are different in size;

[0042] The control unit connects the load through the adaptive interface module, selects the accessed load unit, and when one load unit of a kind of load is selected, the selection of the remaining load units included in the kind of load is invalid;

[0043] The control terminal is connected with the control unit through the communication interface and has a graphical user interface to select a load unit mapping graph through the graphical user interface and further select the corresponding load unit through the control unit, and then load the selected load unit into the measured intrinsically safe power supply through the control unit;

[0044] The detection unit is used to connect and detect the measured intrinsically safe power supply loaded with the selected load unit, and is connected with the control terminal to upload the detection result to the control terminal.

[0045] Figure 1 The circuit principle block diagram of the intrinsically safe power supply transient test device in a preferred embodiment is shown, wherein U3 is a power module, the model of the power module U3 is TAS10-5-W2, which is an AC-DC power module, and in the embodiment of the application, the power module U3 is used to convert the commercial power into 5V DC (the nominal output voltage is 5.05V), the output power is 10w, the output current is 2A, and the pin number is 4Pin, wherein two pins are connected with L and N lines, i.e. used to connect the commercial power through, for example, a two-pin plug, and the other two pins are used to output 5V DC.

[0046] Since the input power of the power module U3 with the model of TAS10-5-W2 belongs to wide voltage (also called wide amplitude voltage), the input voltage is 85V~265V (AC), therefore, the input power is not limited to commercial power.

[0047] In the embodiment of the application, the power used is an experimental power supply, mainly 3.3V (DC), therefore, a secondary voltage conversion is also needed to convert the 5V voltage output by the power module into 3.3V; in the embodiment, the secondary voltage conversion is realized by the power conversion module U4 in Figure 1 , i.e. the model is AP63203WU-7 power chip, which is a static current synchronous DC-DC step-down converter (DC-DC power chip), the working voltage is also wide voltage (3.8V~32V), the output voltage is 3.3V, and the output current is 2A.

[0048] In the embodiment, the power module U3 and the power conversion module U4 are loaded into the measured circuit through the main control board shown in Figure 1 , and the measured circuit shown in Figure 1 is the measured intrinsically safe power supply.

[0049] In the embodiment, the measured intrinsic safety power supply is taken as a power supply unit, and different loads are adapted to the power supply unit, so as to detect the performance of the measured intrinsic safety power supply under different load environments.

[0050] In Figure 1 In the exemplified structure, the power supply module U3, the power conversion module U4, the single-chip microcomputer U1 of the model STM32F103C8T6 adopted by the control unit, and the RS485 interface chip are integrated on one circuit board, which is referred to as the main control board in the figure, and in Figure 2 The pin definitions of the elements are clearly defined in the circuit principle diagram of the main control board, which is shown in Figure 2 and will not be described one by one here. Since the single-chip microcomputer is the core device of the application, Figure 3 the pin definitions of the single-chip microcomputer are separately given to facilitate the viewing of the wiring modes of the pins of the single-chip microcomputer and other elements.

[0051] Further, Figure 3 the pin definitions of the single-chip microcomputer and the wiring of the other circuit units and the single-chip microcomputer can be shown by combining the pin definitions of the other circuit units in the circuit principle diagram of the main control board and Figure 2 the pin definitions of the load modules in Figure 4 .

[0052] Among them, the pins SD11, LOAD1, and SCLK1 of the single-chip microcomputer U1 are externally connected to the resistor board through the interface module U5, and the other interface modules U6, U8, and U9 are sequentially connected to the capacitor board, the diode board, and the inductor board. The line numbers or pin definitions are shown in the figure and will not be described here.

[0053] Figure 4 The interface module U7 of the model ULN2001D (NMW) in Figure 3 is connected to the single-chip microcomputer U1 in through OUT1, OUT2, and OUT3. The interface module U7 of the model ULN2001D is an integrated circuit. It is a member of the ULN200x series Darlington transistor array. The core function of ULN2001D is to serve as a current load driver, especially suitable for connecting microcontrollers / logic circuits and peripheral devices that require large driving current. In the embodiment of the application, the interface module U7 is mainly used to drive the switching of the intrinsic safety on and the switching of the series and parallel connection of the resistance and capacitance, i.e., the switching of the series and parallel connection of the resistor and the capacitor.

[0054] As mentioned earlier, in the preferred embodiment, the load can include a resistance load, a capacitance load, and an inductance load, and can further include a voltage stabilizing diode, and can only include a resistance load. In the preferred embodiment, when multiple loads are selected, complex working conditions are simulated.

[0055] In this embodiment, each load has multiple load units, wherein, Figure 5 The graphical user interface formed by the force control software on the industrial computer as the control terminal. The graphical user interface is used to map the load units and their specific values on the capacitive plate, resistive plate, voltage stabilizing tube plate, and inductive plate.

[0056] In this embodiment, the first load submodule of the load module is a resistance module. The resistance module provides resistance units of multiple resistance values in the "resistance" option bar of the graphical user interface of the upper computer for selection, a total of 13, which are 0Ω, 1mΩ, 2mΩ, 5mΩ, 10mΩ, 20mΩ, 50mΩ, 200mΩ, 500mΩ, 1Ω, 2Ω, 5Ω, and 3Ω value resistance spaces are reserved for the convenience of the operator to add according to the experimental requirements. In one experimental period, the system only allows the selection of one ohm value resistance, which avoids the multiple selection of the operator from the hardware and software double levels. When the operator selects the wrong resistance ohm value, the corresponding ohm value resistance button can be clicked again to cancel the error selection; after the end of an experimental period, the selected ohm value resistance is automatically selected, and the next experiment is ready.

[0057] The second load submodule is a capacitance module. The capacitance module has 12 farad value capacitors in the "capacitance" option bar of the graphical user interface for selection, which are 1μF, 10μF, 100μF, 1000μF, 4.7μF, 47μF, 470μF, 2.2μF, 22μF, 220μF, 2200μF, and 4700μF, and 4 farad value capacitor spaces are reserved for the convenience of the operator to flexibly configure. Similar to resistance selection, only one farad value capacitor can be selected in one experimental period. If the capacitor farad value is selected incorrectly, the corresponding button can be clicked again to cancel the error selection; after the end of the experimental period, the selected capacitor is automatically selected. In addition, to ensure experimental safety, a "capacitor discharge" button is specially set to discharge the selected capacitor after the experiment is completed, eliminating potential safety risks.

[0058] The third load submodule is a voltage stabilizing tube module. The voltage stabilizing tube module provides 16 volt value voltage stabilizing tubes in the "voltage stabilizing tube" (full name: voltage stabilizing diode) option bar of the graphical user interface, including 3.3V, 3.6V, 4.7V, 5.1V, 5.6V, 6.2V, 6.8V, 7.4V, 8.2V, 9.1V, 10V, 12V, 13V, 15V, and 18V. Only one volt value voltage stabilizing tube can be selected at a time during the experiment, and the error selection can be canceled by clicking the corresponding button again; after the experiment is completed, the selected voltage stabilizing tube is automatically selected.

[0059] The fourth load sub-module is an inductance module, which provides 7 inductance units with different henry values in the "inductance" option bar of the graphical user interface, i.e. 5μH, 10μH, 50μH, 100μH, 200μH, 500μH, 1mH, and reserves 1 other henry value inductance position. Similarly, only one henry value inductance is allowed to be selected in one experimental period, and the selected inductance is automatically cancelled after the experiment is completed.

[0060] Regarding the selection of the load unit, the selection or cancellation can be realized by single-click selection and double-click cancellation, or the selected corresponding load unit can be clicked, and a separate cancellation button is further provided to cancel the selected load unit to avoid errors caused by incorrect clicking or system delay.

[0061] Each load unit can be adapted with a cancellation button, Figure 5 Since all the load units are in the graphical user interface of the force control software, all the load units can share a cancellation button.

[0062] It should be understood that the force control software, such as ForceSCADA, realizes system integration through force control configuration, and through the configuration of the graphical module, the display of the industrial production process, the chart analysis, the alarm processing and other business applications can be realized. In the embodiment of the present application, the mapping of the field components in the graphical user interface of the force control configuration can be simply understood, and the selection or cancellation of the graphical unit in the graphical user interface by the operator is equivalent to the selection or cancellation of the load unit.

[0063] In the embodiment, the graphical user interface formed by the force control software on the industrial computer as the host computer can be mapped to the specific components in the field to realize the operation of the components, and at the same time, the industrial computer and the single-chip microcomputer U1 need to be connected through the interface module, such as the RS485 interface shown in Figure 1 to realize the communication between the industrial computer and the single-chip microcomputer in the field.

[0064] In addition, the industrial computer as the host computer also communicates with the monitoring device used in the field detection unit, such as the oscilloscope, through the RJ45 network port, for example, to upload the data of the measured intrinsically safe power detected by the oscilloscope to the industrial computer for saving, processing, display, etc.

[0065] Since there are multiple load units for each load, how to realize the selection of the load unit can refer to Figure 6 the configuration of the resistance board shown in the configuration of the resistance board shown in the configuration of the resistance board shown in the configuration of the resistance board shown in the configuration of the resistance board shown in the configuration of the resistance board shown in the configuration of the resistance board shown in the configuration of the resistance board shown in the configuration of the resistance board shown in the configuration of the resistance board shown in the configuration of the resistance board shown in the configuration of the resistance board shown in the configuration of the resistance board shown in the configuration of the resistance board shown in the configuration of the resistance board shown in the configuration of the resistance board shown in the configuration of the resistance board shown in the 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[0066] Figure 6 Circuit unit 52 is the circuit schematic of 16 resistor units, while circuit unit 51 is the circuit schematic of the interface unit adapted to the resistor board. U5 is... Figure 1 The interface module is used to connect the resistor board to the microcontroller U1 on the main control board. The load interface P1 is the connection interface for the resistor unit to be connected to or loaded onto the intrinsically safe power supply under test. Generally, the load can be directly connected in series with the intrinsically safe power supply under test through the load interface.

[0067] The interface module U5 is a 6-pin interface, with pins SDI1, LOAD1, and SCLK1 used for communication with... Figure 1 Connect the corresponding pins of the microcontroller U1 in the code. Figure 6 The memory register U11 and buffer U14 are connected to two ULN2803A transistor array integrated circuits U12 and U13 via interface module U5. The ULN2803A is a Darlington transistor array integrated circuit. To clearly show the pin definitions of each component, Figure 6 The interface module U5, storage register U11, and buffer U14 are enlarged and represented in Figure 7 middle.

[0068] Figure 7 In the diagram, interface module U5 is the interface module between the resistor board and the microcontroller U1. It stores register U11 and buffer U14, and outputs through pins Q11~Q17 and Q21~Q27. It connects to two transistor array integrated circuits U12 and U13. U12 and U13 each have eight output terminals, resulting in a total of sixteen output terminals X1~X16.

[0069] Figure 7 The device shown, model 74HC595D, is a CMOS device in an SOIC-16 package. It includes an 8th-order serial shift register and a memory register with 3-state outputs. Specifically, it has 8-bit serial inputs to select predetermined resistor units via instructions input from the microcontroller U1. The inputs are buffered, for example, by the memory register U11, and then fed to two transistor array integrated circuits U12 and U13. Each transistor array integrated circuit has eight independent Darlington cells, each with a collector output and a common emitter. The pin configuration includes eight input ports, such as pins Q10-Q17 in U12, and eight output ports, such as X1-X8 in U12, and includes a common ground terminal.

[0070] This embodiment uses Figure 6 Let's take a resistor unit as an example to illustrate how to load the selected resistor unit into the circuit section of the intrinsically safe power supply under test:

[0071] For the sake of clarity, one resistance unit in the resistance board is shown in Figure 8 , Figure 8 is the circuit structure diagram of one resistance unit (0Ω). Specifically, Figure 8 The pin X1 of the resistance unit in the resistance board is connected with the X1 pin in the transistor array integrated circuit U12. When the user selects the resistance of 0Ω in the graphical user interface, the instruction of selecting 0Ω is transmitted to the single-chip microcomputer U1 through the RS485 interface. The single-chip microcomputer U1 transmits the instruction to the storage register U11 through the interface module U5, and further sends out one switching value through the pin X1 of the transistor array integrated circuit U12. Figure 8 The relay K1 in the resistance unit of 0Ω is powered and closed, and the resistance R5 is connected to the intrinsically safe power supply to be tested through the load interface P1.

[0072] Correspondingly, the loads in all the 16 resistance units, such as the resistance R5, are connected with each other through the wiring COMA and COMB, and the relay K1 containing the normally open contact is closed, so that the resistance unit contained in the resistance unit is loaded to the intrinsically safe power supply to be tested. The contacts in other resistance units are not loaded to the intrinsically safe power supply to be tested because they are normally open.

[0073] Among them, the model of the relay K1 is HF49FD / 005-1H11, which is a small-sized medium-power relay, and is a four-pin relay.

[0074] The above briefly describes the connection mode of the resistance unit of 0Ω, and the connection mode of the resistance in other resistance units is the same. The connection mode of other load units is the same.

[0075] As for the selection of a single load unit among the load units contained in the same load, on the one hand, it can be controlled by software, such as the software loaded in the single-chip microcomputer U1. When a load unit is selected, the remaining load units are in a state of being unable to be selected. On the other hand, it can be controlled by hardware, such as the outputs X1~X8 in the transistor array integrated circuit U12, only one of which can output in the same experimental period.

[0076] Figure 1 The main control board in the resistance unit is mainly used to load the load to the intrinsically safe power supply to be tested, and the corresponding terminal for connecting with the circuit to be tested is Figure 6 The load interface P1 in the resistance unit is sequentially represented as PR1, PC1, PD1 and PL1 in different loads, which correspond to resistance load, capacitance load, voltage stabilizing diode load and inductance load respectively. The four kinds of loads can be connected in series based on the series connection of the load interfaces in the basic configuration. Since each load currently has at most one load unit selected, one load module corresponds to one load, and the series and parallel connection of the selected load units is realized by the series and parallel connection among the load interfaces.

[0077] It can be seen from the above that the main control board is mainly used for selecting the load unit, and the load interface P1 is used for loading the selected load unit to the intrinsically safe power supply to be detected. The host computer such as an industrial computer is used for providing human-computer interaction through a graphical user interface, and is used for saving and processing the detection data.

[0078] Therefore, the detection unit such as an oscilloscope is used for detecting the intrinsically safe power supply to be detected through the voltage probe and the current probe shown in Figure 1 , and further uploading the detected data to the industrial computer as the host computer through an RJ45 interface for storage and processing.

[0079] In comparison, the conventional intrinsically safe power supply testing device can generally only detect one kind of load, mainly a resistance connected to the circuit to be detected, and usually only one resistance, or the resistance is replaced for the next cycle of detection, which is low in efficiency and frequent connection also affects the service life of the terminal. In the embodiment of the present application, there are multiple loads, and the connection of the load unit is realized through the closing of the relay, which is high in efficiency. Moreover, the load types are relatively more, and the test environment is changed by selecting different loads, so that the test is more comprehensive.

[0080] The load types at least include at least two of a resistance, an inductance and a capacitance. More test environment configurations can be realized through series-parallel connection switching.

[0081] Figure 9 The circuit configuration for series-parallel connection switching of the resistance-capacitance tube in is shown in FIG. 2, and as described above, the load interfaces PR1, PC1, PD1 and PL1 correspond to the resistance load, the capacitance load, the voltage stabilizing diode load and the inductance load in sequence. Figure 9 The relay K3 in is used for realizing parallel connection of the resistance-capacitance tube, and Figure 9 The relay K4 in is used for series connection of the resistance-capacitance tube. The connection is shown clearly in the figure, and will not be described here. The states of the relay K1 and the relay K4 are obviously mutually exclusive.

[0082] The model of the relay K3 is HF11F / 005-2ZS4, which is an eight-pin relay and contains three pairs of contacts.

[0083] Figure 4 In , the interface module U7 is connected with the single-chip microcomputer U1, and the pins 6-8 are three output pins, which are Y1-Y3 in sequence. In Figure 9 The input pin Y2 of the relay K3 is connected with the pin Y1 of the interface module U7, and the input pin Y3 of the relay K4 is connected with the pin Y3 of the interface module U7, and the input pin Y1 of the relay K2 is connected with the pin Y1 of the interface module U7.

[0084] Wherein the pin IN11 and IB1- of the relay K3 are connected with the resistance interface PR1 respectively, the pin IN1 and IB- of the relay K3 are connected with the IN1 and IB- pin of the capacitance interface PC1, when the relay K3 is attracted, for the realization of the parallel connection of the resistance and capacitance tube. The other Figure 9 The comparison is shown in the foregoing description, and will not be repeated here.

[0085] In addition, Figure 9 The relay K2 is used for the control of the intrinsic safety connection, i.e. the power-on of the measured intrinsic safety power supply, which belongs to the basic configuration and is also common sense in the field, and will not be repeated here.

[0086] Correspondingly, Figure 9 The interface module U10 in the foregoing description is used for connecting the power supply module.

[0087] For the resistance and the voltage stabilizing diode, after the power-off, the electric quantity is not stored generally, but for the capacitance, the electric quantity is stored, in order not to affect the subsequent test, if the selected load includes the capacitance, the discharge circuit of the capacitance is adapted to discharge the selected capacitance after the current test.

[0088] The discharge of the capacitance is relatively easy to realize, after the relay K2 of the intrinsic safety connection is disconnected, as long as the measured intrinsic safety power supply and the current selected load unit form a loop, the capacitance will be discharged automatically. The same is true for the inductance.

[0089] In some implementations, a short circuit can also be provided for the capacitance plate, so as to discharge the capacitance used in the current test configuration through the short circuit after the test is completed. The short circuit is provided with a discharge resistance, so as to avoid the generation of excessive current.

[0090] Based on the foregoing description, the embodiment also provides an intrinsic safety power supply transient energy test method, comprising:

[0091] 1) Referring to Figure 1 The intrinsic safety power supply to be measured is connected to the reserved terminal on the foregoing intrinsic safety power supply transient test device main control board;

[0092] 2) The current test load unit is selected through the control terminal, and the test is started;

[0093] 3) The current detection data of the measured intrinsic safety power supply is uploaded to the control terminal by the detection unit, and the current test is ended;

[0094] 4) The steps 2) and 3) are cycled until all the predetermined test items are tested completely;

[0095] In the embodiment, each load can be selected only one load unit in one test.

[0096] It should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope defined by the present application.

Claims

1. An intrinsic safety power supply transient energy test device, characterized in that, The device comprises a load module, a control unit, a control terminal and a detection unit. The load module has at least one kind of load, and each kind of load has multiple load units, and the sizes of the load units included in the same kind of load are different. The control unit is connected to the load module through an adaptive interface module, and is used for selecting the accessed load unit, and when one load unit of one kind of load is selected, the selection of the remaining load units included in the same kind of load is invalid. The control terminal is connected to the control unit through a communication interface, and has a graphical user interface, and the load unit mapping graph is selected through the graphical user interface, and the corresponding load unit is further selected through the control unit, and then the selected load unit is loaded to the measured intrinsically safe power supply through the control unit. The detection unit is used for connecting and detecting the measured intrinsically safe power supply loaded with the selected load unit, and is connected to the control terminal to upload the detection result to the control terminal.

2. The intrinsic safety power supply transient energy test device according to claim 1, characterized in that, The load module comprises at least two kinds of loads selected from resistance, inductance and capacitance according to the load types.

3. The intrinsic safety power supply transient energy test device according to claim 2, characterized in that, The load module further comprises a voltage stabilizing diode according to the load types.

4. The intrinsic safety power supply transient energy test device according to claim 1, characterized in that, The number of load units of each kind of load in the load module is not less than five and not more than twenty.

5. The intrinsic safety power supply transient energy test device according to claim 2, characterized in that, If the selected load of the control unit includes a capacitor, the control unit is adapted with a discharge circuit of the capacitor to discharge the selected capacitor in the current test after the current test is completed.

6. The intrinsic safety power supply transient energy test device according to claim 1, characterized in that, Each kind of load in the load module forms a load sub-module. A switching circuit is provided for switching between the load sub-modules in series or in parallel, and the switching between the load sub-modules in series or in parallel is realized based on a relay.

7. The intrinsic safety power supply transient energy test device according to claim 6, characterized in that, Each load sub-module is adapted with a circuit board.

8. The intrinsic safety power supply transient energy test device of claim 1, wherein, The device further comprises a power module to convert commercial power into experimental power. The power module and the control unit are integrated on a main control board, and the main control board communicates with the control terminal through an RS485 interface.

9. A method for testing transient energy of an intrinsically safe power supply, based on the testing device for transient energy of an intrinsically safe power supply according to claim 8, characterized in that, The method comprises the following steps: 1) connecting the intrinsically safe power supply to be tested on the reserved terminal of the main control board of the intrinsically safe power supply transient test device; 2) selecting the load unit for the current test through the control terminal and starting the test; 3) uploading the current detection data of the intrinsically safe power supply to be tested to the control terminal through the detection unit, and ending the current test; 4) repeating steps 2) and 3) until all the predetermined test items are tested; Wherein only one load unit of each kind of load can be selected in one test.

10. The intrinsic safety power supply transient energy test method of claim 9, wherein: Each kind of load corresponds to a cancel option in the graphical user interface of the control terminal, or all the loads correspond to one cancel option, so that when the load unit selection is wrong, the currently selected load unit is cancelled through the cancel option first, and then the target load unit is selected; The load unit used for configuring the test environment is constructed as a load module, the load module has at least one kind of load, and each kind of load has multiple load units; Furthermore, different load units or combinations of different kinds of load units are sequentially selected to test the intrinsically safe power supply, so as to comprehensively test various working conditions of the intrinsically safe power supply.

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