Portable relay intelligent verification device

Abstract

According to the portable relay intelligent verification device disclosed by the utility model, the power supply module, the interaction module, the main control module and the protection module work cooperatively, the power supply module is connected with the interaction module, the main control module and the protection module, and the power supply module supplies power to the interaction module, the main control module and the protection module; the interaction module is connected with the main control module and comprises a display screen and a plurality of keys; the protection module is connected with an external relay and the main control module and comprises an energy release circuit; and the main control module is connected with an external relay so as to verify the external relay. The main control module is connected with and verifies various functions of an external relay, alternating current and direct current verification modes are provided at the same time, setting of the device and reading of verification results are achieved through the interaction module, high integration enables the device to be smaller in size and more portable compared with the prior art, and verification efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of relay verification technology, and in particular to a portable intelligent relay verification device. Background Technology

[0002] There are many items to check for relays, including: coil DC resistance, operating voltage, operating power, operating time, return voltage, return power, return time, normally closed contact contact resistance, normally open contact insulation resistance, normally open contact contact resistance after operation, and open contact insulation after operation.

[0003] During routine calibration, a relay tester must be connected using test leads and test fixtures. Then, the voltage is manually applied to activate and deactivate the relay. During this process, a multimeter is used to check the coil DC resistance and contact parameters, comparing them with standard values, and the relay's pass / fail status is manually determined. This conventional calibration method has several drawbacks, including cumbersome wiring, risk of electric shock, low testing efficiency, and significant human influence on the test results. Therefore, there is an urgent need to find an intelligent relay calibrator suitable for field maintenance workers to replace the existing conventional calibration method. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a portable intelligent relay verification device.

[0005] The technical solution adopted by this utility model to solve its technical problem is: to construct a portable intelligent relay verification device, which includes a housing, and a power module, an interaction module, a main control module and a protection module disposed in the housing;

[0006] The power module connects the interaction module, the main control module, and the protection module, and provides power to the interaction module, the main control module, and the protection module.

[0007] The interaction module is connected to the main control module, and the interaction module includes a display screen and several buttons;

[0008] The protection module is connected to an external relay and the main control module, and the protection module includes an energy discharge circuit;

[0009] The main control module is connected to an external relay to verify the external relay.

[0010] Preferably, in the portable relay intelligent verification device constructed by this utility model, the main control module includes a channel switching circuit, which includes a plurality of parallel contact measurement channels and a plurality of internal relays disposed on the contact measurement channels.

[0011] Preferably, in the portable relay intelligent verification device constructed in this utility model, the contact measurement channel is used to connect the corresponding contacts of the external relay;

[0012] The buttons are used to control the corresponding internal relays in the channel switching circuit, and the internal relays cooperate to control the connection and disconnection of each contact measurement channel.

[0013] Preferably, in the portable relay intelligent verification device constructed in this utility model, the number of contacts in the contact measurement channel is five.

[0014] Preferably, in the portable relay intelligent verification device constructed in this utility model, the main control module further includes a mode switching module, which includes a DC input terminal, an AC input terminal, and a power output terminal. The DC input terminal is connected to a DC power supply, and the AC input terminal is connected to an AC power supply.

[0015] The power output terminal and the DC input terminal form a DC channel, and the power output terminal and the AC input terminal form an AC channel. At any given time, one of the DC channel and the AC channel can be selectively turned on.

[0016] Preferably, in the portable relay intelligent verification device constructed in this utility model, the main control module further includes a field-effect transistor, and the drain and source of the field-effect transistor are connected to the DC channel.

[0017] The main control module also includes a measurement optocoupler and a bidirectional thyristor, wherein the receiver of the measurement optocoupler is connected in parallel with the bidirectional thyristor, and the bidirectional thyristor is connected in parallel on the AC channel;

[0018] The main control module also includes a measuring resistor, one end of which is connected to a normally open contact and a normally closed contact, and the other end of which is connected to a common terminal.

[0019] The interactive module includes an oscilloscope; the oscilloscope includes a first channel connected to the main control module through the mode switching module, and also includes a second channel directly connected to the main control module;

[0020] The first channel includes a first input port and a second input port. The first pin of the first input port is connected to the drain of the field-effect transistor, and the second pin of the first input port is connected to the source of the field-effect transistor. The second input port is connected to the AC channel through a measurement optocoupler. The first pin of the second input port is connected to the negative terminal of the emitter of the measurement optocoupler, and the second pin of the second input port is grounded. The second channel is connected in parallel with the measurement resistor.

[0021] Preferably, in the portable relay intelligent verification device constructed in this utility model, the main control module further includes a controller and a transceiver circuit connected to the controller;

[0022] The transceiver circuit includes a first optocoupler and a second optocoupler connected to the controller, and also includes a transceiver connected to the first optocoupler and the second optocoupler;

[0023] The transceiver's driver input pin is connected to the first output terminal of the first optocoupler, and the transceiver's receiver enable pin and driver enable pin are both connected to the second output terminal of the first optocoupler; the transceiver's receiver output pin is connected to the cathode of the second optocoupler, and the output terminal of the second optocoupler is connected to the controller.

[0024] Preferably, in the portable relay intelligent verification device constructed in this utility model, the interaction module further includes a signal processing circuit, which includes a digital isolator, a digital-to-analog converter, and an amplifier connected in sequence between the controller block and the display screen.

[0025] Preferably, in the portable relay intelligent verification device constructed in this utility model, the channel switching circuit further includes a driving array composed of at least one Darlington transistor;

[0026] The input terminal of the Darlington transistor is connected to the button, and the output terminal of the Darlington transistor is connected to the internal relay.

[0027] Preferably, in the portable relay intelligent verification device constructed in this utility model, the protection module further includes a heat dissipation unit; at least one side of the housing is provided with a heat dissipation vent connecting the inner and outer sides of the housing.

[0028] By implementing this utility model, the following beneficial effects can be achieved:

[0029] The portable relay intelligent verification device disclosed in this utility model works in concert through a power module, an interaction module, a main control module, and a protection module. The main control module connects to and verifies various functions of external relays, while providing both AC and DC verification modes. The interaction module enables the device to be set and the verification results to be read. The high integration makes the device smaller and more portable than existing technologies.

[0030] This utility model patent provides a device that differs from laboratory calibration instruments. Maintenance workers can easily transfer and transport it on-site. The device is suitable for various factories, maintenance rooms, and equipment rooms. It is small in size and lightweight. This device allows for the customization of relay calibration items and can save templates for repeated use. It enables manual setting of calibration standards and automatic judgment of whether calibration results are qualified. Calibration results can be stored in a database to establish a relay history library, facilitating aging analysis. This device can also complete routine relay calibration items within 30 seconds. No human intervention is required during the calibration process. From instrument startup to final judgment and report output, the entire process is fully automated, improving work efficiency and quality while reducing safety risks compared to manual calibration. Attached Figure Description

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0032] Figure 1 This is a first structural schematic diagram of the portable relay intelligent verification device in the first embodiment of this utility model;

[0033] Figure 2 This is a schematic diagram of the second structure of the portable relay intelligent verification device in the first embodiment of this utility model;

[0034] Figure 3 This is a schematic diagram of the module of the portable relay intelligent verification device in the first embodiment of this utility model;

[0035] Figure 4 This is a first schematic diagram of the portable relay intelligent verification device in the first embodiment of this utility model;

[0036] Figure 5 This is a second schematic diagram of the portable relay intelligent verification device in the first embodiment of this utility model;

[0037] Figure 6 This is the third schematic diagram of the portable relay intelligent verification device in the first embodiment of this utility model;

[0038] Figure 7 This is the fourth schematic diagram of the portable relay intelligent verification device in the first embodiment of this utility model;

[0039] Figure 8 This is the fifth schematic diagram of the portable relay intelligent verification device in the first embodiment of this utility model;

[0040] Figure 9 This is the sixth schematic diagram of the portable relay intelligent verification device in the first embodiment of this utility model. Detailed Implementation

[0041] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0042] It should also be noted that, unless otherwise expressly specified and limited, when an element is referred to as being "on" or "below" another element, that element can be located "directly" or "indirectly" on the other element, or there may be one or more intermediary elements. The terms "first," "second," "third," etc., are used only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0043] In the following description, specific details such as particular system structures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0044] The "external relay" and "internal relay" mentioned in this utility model refer to the target verification object and the internal circuit components of the portable relay intelligent verification device of this utility model, respectively.

[0045] See Figures 1 to 3This utility model discloses a portable intelligent relay verification device for intelligent detection and verification of external relays. The portable intelligent relay verification device includes a housing 1, and a power module, an interaction module, a main control module, and a protection module disposed within the housing 1. The power module connects to the interaction module, the main control module, and the protection module, and provides power to these modules. The interaction module connects to the main control module and includes a display screen 2 and several buttons 4. The protection module connects to the external relay and the main control module, and includes a discharge circuit. The main control module connects to the external relay to verify it.

[0046] In this embodiment, the external relay being verified can be a DC relay or an AC relay. For these external relay objects, the main control module can build a database based on its storage function to save the corresponding external relay verification templates to meet multiple calls during use. The power supply module can be a programmable power supply.

[0047] The database can track the verification data of each external relay, generate a QR code based on the verification data, and print it as a sticker. The data in the QR code includes, but is not limited to, all data of the verification item, verification date, batch, and entry time. External relay objects, external relay verification templates, and verification reports in the database can all be edited, deleted, and saved. All data can be backed up locally or stored in the cloud by combining network functionality and cloud servers.

[0048] The external relay coil is an inductive element. To reduce the damage to the external relay coil and the verification circuit caused by the high voltage generated when the coil power is disconnected during short-term multiple verifications, a relevant protection or energy dissipation circuit is set up. Furthermore, the energy dissipation circuit unit, through components such as a braking resistor and a switching transistor, quickly conducts when an abnormal voltage increase is detected, discharging electrical energy into the braking resistor to protect the safety of the circuit and equipment.

[0049] Furthermore, the preferred external structure of the portable relay intelligent verification device disclosed in this embodiment is visible. Figures 1 to 2 The portable intelligent relay calibration device features a number of buttons 4, sockets 3, and indicator lights on its panel. Through these sockets 3, external relays and their test nodes can be reliably connected to the various modules of the portable intelligent relay calibration device to perform corresponding calibration functions. Furthermore, due to the high degree of circuit integration, the portable intelligent relay calibration device is small in size, making it portable.

[0050] Further, see Figure 4In the portable relay intelligent verification device disclosed in this embodiment, the main control module includes a channel switching circuit, which includes a plurality of parallel contact measurement channels and a plurality of internal relays disposed on the contact measurement channels.

[0051] Furthermore, in the portable relay intelligent verification device disclosed in this embodiment, the contact measurement channel is used to connect to the corresponding contacts of the external relay. Several buttons 4 are used to control several internal relays corresponding to the channel switching circuit, and these internal relays cooperate to control the connection and disconnection of each contact measurement channel.

[0052] Furthermore, in the portable relay intelligent verification device disclosed in this embodiment, the number of contacts in the contact measurement channel is five. Specifically, see... Figure 4 The normally open contact NO and normally closed contact NC work together with the common terminal COM. The first normally open contact NO1, the second normally open contact NO2, the first normally closed contact NC1 and the second normally closed contact NC2 work together with the first common terminal COM1 and the second common terminal COM2.

[0053] Furthermore, the channel switching subunit achieves sequential measurement based on the five pairs of contact measurement channels of the corresponding calibrator, which can reduce the number of instrument hardware configuration modules and improve hardware utilization.

[0054] The above settings meet the requirement of diverse external relay contact styles. Because a pair of contacts may have 2 or 3 terminals, contacts may be normally open or normally closed, and the number of contact pairs in a single external relay is uncertain, setting up multi-channel measurement hardware allows the portable intelligent relay calibration device to be compatible with more types of external relays, increasing its versatility. Based on the multi-contact measurement channels, the portable intelligent relay calibration device can independently edit the contact characteristics of external relays when creating external relay objects.

[0055] Furthermore, in some embodiments, each internal relay in the portable relay intelligent verification device is connected in parallel with an indicator LED diode, and the working state of the corresponding internal relay can be determined by the conduction and cutoff status of these LED diodes.

[0056] Furthermore, in the portable relay intelligent verification device disclosed in this embodiment, the main control module further includes a mode switching module. The mode switching module includes a DC input terminal, an AC input terminal, and a power output terminal. The DC input terminal is connected to a DC power supply, and the AC input terminal is connected to an AC power supply. The power output terminal and the DC input terminal form a DC channel, and the power output terminal and the AC input terminal form an AC channel. At any given time, one of the DC channel and the AC channel can be selectively turned on.

[0057] The portable relay intelligent calibration device in this embodiment can calibrate external relays for the following items, including but not limited to: coil DC resistance, operating voltage, operating power, operating time, return voltage, return power, return time, normally closed contact resistance, normally open contact insulation, contact resistance after operation, and open contact insulation after operation. Each external relay to be tested can independently select calibration items.

[0058] Further, see Figure 5 and Figure 6 In the portable relay intelligent verification device disclosed in this embodiment, the main control module further includes a field-effect transistor Q1, the drain D and the source S of which are connected to the DC channel; the main control module further includes a measurement optocoupler U48 and a bidirectional thyristor U46, the receiver of which is connected in parallel with the bidirectional thyristor, and the bidirectional thyristor U46 is connected in parallel with the AC channel; the main control module further includes a measurement resistor R10, one end of which is connected to a normally open contact NO and a normally closed contact NC, and the other end of which is connected to a common terminal COM. The interactive module includes an oscilloscope; the oscilloscope includes a first channel CH1 connected to the main control module via the mode switching module, and a second channel CH2 directly connected to the main control module; wherein, the first channel includes a first input port J2 and a second input port J3, the first pin of the first input port J2 is connected to the drain D of the field-effect transistor Q1, and the second pin of the first input port J2 is connected to the source S of the field-effect transistor Q1; the second input port J3 is connected to an AC channel via a measurement optocoupler U48, the first pin of the second input port is connected to the negative terminal of the transmitter of the measurement optocoupler, and the second pin of the second input port J3 is grounded GND; the second channel CH2 is connected in parallel with the measurement resistor.

[0059] The portable intelligent relay calibration device can also be used to measure DC or AC relays, using different power generators for testing. The portable intelligent relay calibration device includes a resistance testing module (preferably with a 3kΩ range). When the external relay is not powered on, the test coil resistance is engaged; when testing the operating time of the external relay, the coil engages to connect the oscilloscope CH1.

[0060] The portable intelligent relay calibration device can also be used to test the contact resistance of external relays, including normally closed and normally open resistances. The device includes a resistance test module, preferably 500mΩ, to test the resistance of the normally open contacts of the external relay when they are closed, and to test the resistance of the normally closed contacts. The oscilloscope CH2 is turned on when testing the action time.

[0061] Further, see Figure 7In the portable relay intelligent verification device disclosed in this embodiment, the main control module further includes a controller. The processor used in this embodiment is an STM32 controller, specifically an STM32F103RBT6. The main control module also includes a transceiver circuit connected to the controller. The transceiver circuit includes a first optocoupler U97 and a second optocoupler U101 connected to the controller U49, and a transceiver U98 connected to both the first and second optocouplers U97 and U101. The driver input pin of the transceiver U98 is connected to the first output terminal of the first optocoupler, and the receiver enable pin and driver enable pin of the transceiver are both connected to the second output terminal of the first optocoupler. The receiver output pin of the transceiver is connected to the cathode of the second optocoupler, and the output terminal of the second optocoupler is connected to the controller. The transceiver U98 also includes two signal line pins. Through the transceiver circuit, the portable relay can be properly isolated and protected during communication, ensuring the integrity of bidirectional communication during the verification process.

[0062] Further, see Figure 8 In the portable relay intelligent verification device disclosed in this embodiment, the interaction module further includes a signal processing circuit, which includes a digital isolator, a digital-to-analog converter, and an amplifier connected in sequence between the controller block and the display screen 2.

[0063] The first data input pin, first clock pin, and first synchronization pin of the digital isolator are respectively connected to the second data input pin, second clock pin, and second synchronization pin of the controller. After passing through the digital isolator, the digital-to-analog converter receives these signals and outputs them as analog signals. These analog signals are then processed by an amplifier and input to the display screen 2 to display the data.

[0064] Furthermore, in the portable relay intelligent verification device disclosed in this embodiment, the channel switching circuit further includes a driving array composed of at least one Darlington transistor; the input terminal of the Darlington transistor is connected to the button 4, and the output terminal of the Darlington transistor is correspondingly connected to the internal relay.

[0065] Specifically, see Figure 8 All buttons, including the third button K3 to the twenty-fifth button K25, are connected to the input terminals of three Darlington transistors. The corresponding output terminals of the Darlington transistors are then connected to the third ground terminal K_GND3 to the twenty-fifth ground terminal K_GND25, respectively, corresponding to the third button K3 to the twenty-fifth button K25. The Darlington transistors serve to drive the internal relays and improve the current driving capability.

[0066] In some embodiments, see Figure 9 In this portable relay intelligent verification device, the specific structure of button 4 is as follows: it includes an optocoupler, specifically model EL3H7. The positive terminal of the button optocoupler's transmitter is connected to the controller port in the main control module, and the negative terminal is grounded; one end of the button optocoupler's receiver is connected to the input terminal of the Darlington transistor array, so that the corresponding output terminal of the Darlington transistor array sends the enhanced drive signal to the corresponding ground terminal, and the other end of the button optocoupler is grounded.

[0067] Furthermore, in the portable relay intelligent verification device disclosed in this embodiment, the protection module further includes a heat dissipation unit, and at least one side of the housing 1 is provided with a heat dissipation vent connecting the inner and outer sides of the housing 1. For example, the heat dissipation unit includes a cooling fan, which exchanges the air inside and outside the housing 1, effectively exchanging the temperature inside and outside the device and preventing the components from overheating and affecting the verification effect of the device.

[0068] Furthermore, the portable intelligent relay testing device includes at least one voltage regulator circuit, specifically a first circuit that converts a 12-volt input voltage to a 6-volt output voltage, a second voltage regulator circuit that converts a 12-volt input voltage to a 5-volt output voltage, and a third voltage regulator circuit that converts a 5-volt input voltage to a 3.3-volt output voltage. These voltage regulator circuits provide suitable operating voltages to the relevant external circuits within the portable intelligent relay testing device.

[0069] Furthermore, this portable intelligent relay calibration device can also perform batch calibration, allowing users to set the number of calibrations and whether to perform cyclic calibration, and can record the number of actions to meet the requirements for repeated calibration of a single batch. A single calibration for routine items can be completed within 30 seconds. This portable intelligent relay calibration device can also operate continuously for extended periods, continuously calibrating external relays and performing simulated aging tests on them. When the voltage exceeds a set value, if an external relay fails to operate, the device can automatically stop the voltage boosting operation of that external relay. The specific workflow is as follows: creating an external relay object, building an external relay calibration template, executing external relay calibration actions according to the external relay calibration template, and outputting an external relay calibration report.

[0070] When using this portable intelligent relay calibration device, an external relay object is first created. An external relay calibration template is then built based on historical calibration data. The external relay main control module executes the calibration template, and after calibration, a calibration report is output to the interactive module for operator reference and review. The device features customizable external relay calibration items and can save templates for repeated use. It allows for manual setting of calibration standards and automatic judgment of calibration results. Calibration results can be stored in a database to create an external relay history library for aging analysis. The device can complete routine external relay calibration items within 30 seconds, improving efficiency and quality while reducing safety risks compared to manual calibration. Furthermore, no human intervention is required during the calibration process; the main control module executes preset programs, making the entire process from instrument startup to final result judgment and report output fully automated.

[0071] By implementing this utility model, the following beneficial effects can be achieved:

[0072] The portable relay intelligent verification device disclosed in this utility model works in concert through a power module, an interaction module, a main control module, and a protection module. The main control module connects to and verifies various functions of external relays, while providing both AC and DC verification modes. The interaction module enables the device to be set and the verification results to be read. The high integration makes the device smaller and more portable than existing technologies.

[0073] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, without departing from the concept of the present utility model, the above embodiments or technical features can be freely combined, and several modifications and improvements can be made. These all fall within the protection scope of the present utility model, that is, the embodiments described "in some embodiments" can be freely combined with any of the embodiments above and below. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A portable intelligent relay verification device, characterized in that, It includes a housing, and a power module, an interaction module, a main control module, and a protection module disposed within the housing; The power module connects the interaction module, the main control module, and the protection module, and provides power to the interaction module, the main control module, and the protection module. The interaction module is connected to the main control module, and the interaction module includes a display screen and several buttons; The protection module is connected to an external relay and the main control module, and the protection module includes an energy discharge circuit; The main control module is connected to an external relay to verify the external relay.

2. The portable relay intelligent verification device according to claim 1, characterized in that, The main control module includes a channel switching circuit, which includes several parallel contact measurement channels and several internal relays disposed on the contact measurement channels.

3. The portable relay intelligent verification device according to claim 2, characterized in that, The contact measurement channel is used to connect to the corresponding contacts of the external relay; The buttons are used to control the corresponding internal relays in the channel switching circuit, and the internal relays cooperate to control the connection and disconnection of each contact measurement channel.

4. The portable relay intelligent verification device according to claim 2, characterized in that, The contact measurement channel has five contacts.

5. The portable relay intelligent verification device according to claim 2, characterized in that, The main control module also includes a mode switching module, which includes a DC input terminal, an AC input terminal, and a power output terminal. The DC input terminal is connected to a DC power supply, and the AC input terminal is connected to an AC power supply. The power output terminal and the DC input terminal form a DC channel, and the power output terminal and the AC input terminal form an AC channel. At any given time, one of the DC channel and the AC channel can be selectively turned on.

6. The portable relay intelligent verification device according to claim 5, characterized in that, The main control module also includes a field-effect transistor (FET), the drain of which and the source of which are connected to the DC channel. The main control module also includes a measurement optocoupler and a bidirectional thyristor, wherein the receiver of the measurement optocoupler is connected in parallel with the bidirectional thyristor, and the bidirectional thyristor is connected in parallel on the AC channel; The main control module also includes a measuring resistor, one end of which is connected to a normally open contact and a normally closed contact, and the other end of which is connected to a common terminal. The interactive module includes an oscilloscope; the oscilloscope includes a first channel connected to the main control module through the mode switching module, and also includes a second channel directly connected to the main control module; The first channel includes a first input port and a second input port. The first pin of the first input port is connected to the drain of the field-effect transistor, and the second pin of the first input port is connected to the source of the field-effect transistor. The second input port is connected to the AC channel through a measurement optocoupler. The first pin of the second input port is connected to the negative terminal of the emitter of the measurement optocoupler, and the second pin of the second input port is grounded. The second channel is connected in parallel with the measurement resistor.

7. The portable relay intelligent verification device according to claim 1, characterized in that, The main control module also includes a controller and a transceiver circuit connected to the controller; The transceiver circuit includes a first optocoupler and a second optocoupler connected to the controller, and also includes a transceiver connected to the first optocoupler and the second optocoupler; The transceiver's driver input pin is connected to the first output terminal of the first optocoupler, and the transceiver's receiver enable pin and driver enable pin are both connected to the second output terminal of the first optocoupler; the transceiver's receiver output pin is connected to the cathode of the second optocoupler, and the output terminal of the second optocoupler is connected to the controller.

8. The portable relay intelligent verification device according to claim 7, characterized in that, The interaction module also includes a signal processing circuit, which comprises a digital isolator, a digital-to-analog converter, and an amplifier connected in sequence between the controller block and the display screen.

9. The portable relay intelligent verification device according to any one of claims 2 to 6, characterized in that, The channel switching circuit also includes a drive array consisting of at least one Darlington transistor; The input terminal of the Darlington transistor is connected to the button, and the output terminal of the Darlington transistor is connected to the internal relay.

10. The portable relay intelligent verification device according to claim 1, characterized in that, The protection module also includes a heat dissipation unit; at least one side of the housing is provided with a heat dissipation port that connects the inner and outer sides of the housing.

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