Function detection device for helicopter DC power supply control assembly

Abstract

The embodiment of the utility model discloses a function detection device for a helicopter DC power supply control assembly. The function detection device comprises a power supply module, an operation display unit, a main control unit, a discrete magnitude / analog quantity acquisition unit, a 2A / 8A relay output unit, a high-precision resistance meter unit and a current sensor test unit which are arranged in a cabinet. The direct-current power supply control assembly is electrically connected with the discrete magnitude / analog quantity acquisition unit, the 2A / 8A relay output unit, the high-precision resistance meter unit and the current sensor test unit through adapter cables respectively; a power supply on the helicopter is connected to the power supply module, and power supply support is provided for testing of the direct-current power supply control assembly through the power supply module; corresponding detection control is provided for the direct-current power supply control assembly by operating input on the display unit, and working state information of the direct-current power supply control assembly is displayed in the detection process, so that function detection of the direct-current power supply control assembly is realized.

Description

Technical Field

[0001] The utility model relates to but is not limited to the technical field of helicopter electrical debugging, in particular to a function detection device for a helicopter direct current power supply control component. Background Art

[0002] The helicopter DC power supply control component controls the connection and disconnection of internal contactors, relays and other components, as well as monitors the status of internal current and voltage to achieve power distribution control and feeder protection of the helicopter DC power supply system.

[0003] However, when the helicopter is powered on on the ground or in flight, if the DC power control component fails to provide current to the load or fails to cut off the power supply circuit normally, the electrical equipment on the helicopter will not work or will be damaged, greatly affecting flight safety. Utility Model Content

[0004] Purpose of the utility model: In order to solve the above-mentioned technical problems, the embodiment of the utility model provides a function detection device for a helicopter DC power supply control component to solve the problem that when the helicopter is powered on on the ground or in flight, the DC power supply control component fails to provide current to the load or fails to normally cut off the power supply circuit, thereby affecting flight safety.

[0005] The technical solution of the utility model: The embodiment of the utility model provides a function detection device for a helicopter DC power supply control component, comprising: a chassis, a power supply module arranged in the chassis, an operation display unit, a main control unit, a discrete quantity / analog quantity acquisition unit, a 2A / 8A relay output unit, a high-precision resistance meter unit and a current sensor test unit, and a transfer cable;

[0006] Among them, the DC power supply control component of the helicopter is electrically connected to the discrete quantity / analog quantity acquisition unit, the 2A / 8A relay output unit, the high-precision resistance meter unit and the current sensor test unit through the adapter cable;

[0007] The power supply on the helicopter is connected to the power supply module, which is respectively connected to the operation display unit and the main control unit. The power supply on the helicopter is converted into the working voltage of each unit in the function detection device through the power supply module to provide power supply support for the test of the DC power supply control component;

[0008] The main control unit is also electrically connected to the operation display unit, the discrete quantity / analog quantity acquisition unit, the 2A / 8A relay output unit, the high-precision resistance meter unit and the current sensor test unit, respectively, and provides corresponding detection control to the DC power supply control component through the input on the operation display unit, and displays the working status information of the DC power supply control component during the detection process, so as to realize the functional detection of the DC power supply control component.

[0009] Optionally, in the function detection device for a helicopter DC power supply control component as described above, the power supply module includes: an AC / DC power supply unit, a DC / DC power supply unit, and a DC adjustable power supply unit respectively connected to the AC / DC power supply unit and the DC / DC power supply unit;

[0010] The AC power supply on the helicopter is connected to the AC / DC power supply unit, and the on-board DC power supply is connected to the DC / DC power supply unit. The input AC power is converted into an internal DC power supply through the AC / DC power supply unit, and the input DC power is converted into an internal DC voltage through the DC / DC power supply unit. After the voltage conversion through the DC adjustable power supply unit, power supply support is provided for the test of the DC power supply control component.

[0011] Optionally, in the function detection device for a helicopter DC power supply control assembly as described above, the main control unit is electrically connected to the discrete quantity / analog quantity acquisition unit, the 2A / 8A relay output unit, the high-precision resistance meter unit and the current sensor test unit through a bus, respectively, to achieve the sending of control signals and the receiving of status signals between the DC power supply control assembly;

[0012] Among them, the 2A / 8A relay output unit outputs the test voltage signal to the corresponding interface position of the DC power supply control component;

[0013] Discrete quantity / analog quantity acquisition unit, reads the data information of the optocoupler and AD acquisition module in the DC power supply control component and communicates with the main control unit;

[0014] High-precision resistance meter unit, to detect the resistance value of each resistor in the DC power supply control component;

[0015] The current sensor test unit tests whether the working state of the Hall current sensor in the DC power supply control component is normal.

[0016] Optionally, in the function detection device for a helicopter DC power supply control component as described above,

[0017] The AC / DC power supply unit includes an AC / DC power supply module, a diode, a 0-32V DC / DC power supply module, a +12V power supply module and a +5V power supply module, and is used to convert the onboard AC220V power supply into one adjustable 0-32V DC power supply, one +12V DC power supply and one +5V DC power supply, and provide control voltage for the DC power supply control component, the Hall current sensor and the processor.

[0018] Optionally, in the function detection device for a helicopter DC power supply control component as described above,

[0019] The DC / DC power supply unit includes a diode, a 0-32V DC / DC power supply module, a +12V power supply module and a +5V power supply module, so as to convert the onboard +28V DC power supply into one adjustable 0-32V DC power supply, one +12V DC power supply and one +5V DC power supply through the AC / DC power supply unit, and provide control voltage for the DC power supply control component, the Hall current sensor and the processor.

[0020] Optionally, in the function detection device for a helicopter DC power supply control component as described above,

[0021] The discrete quantity / analog quantity acquisition unit includes an FPGA processor, an optocoupler, and an AD sensor. The status signal of the DC power supply control component enters the optocoupler isolation after current limiting protection, and the data of the optocoupler isolation is read by the FPGA processor and sent to the main control unit through the RS422 interface. The AD sensor completes the conversion of the analog quantity of the acquisition signal into a digital quantity, which is used to collect the DC voltage on the bus bar of the DC power supply control component.

[0022] Optionally, in the functional detection device for a helicopter DC power supply control component as described above, the 2A / 8A relay output unit includes an FPGA processor, a drive circuit, a 2A relay and an 8A relay; wherein, after the FPGA processor receives the control signal sent by the main control unit, it drives the relay through the drive circuit to output a 28V / open signal or a ground / open signal to the DC power supply control component, thereby realizing a control function test of the DC power supply control component.

[0023] Optionally, in the function detection device for a helicopter DC power supply control component as described above,

[0024] The high-precision resistance meter unit adopts a DM4 high-precision intelligent digital display resistance meter to collect the resistance value in the DC power supply control component in real time and send it to the main control unit through the RS232 interface.

[0025] Optionally, in the function detection device for a helicopter DC power supply control component as described above,

[0026] The current sensor test unit includes a resistor, a DC / DC power module and an I / V conversion module; the DC / DC power module provides working power to the Hall current sensor in the DC power control component, and a 10A current is loaded through the resistor to make the current sensor output a detected current signal. The current signal transmits a voltage signal to the main control unit after passing through the I / V conversion module; the voltage signal is used as a basis for judging whether the wiring relationship of the current sensor and the output voltage are normal.

[0027] Beneficial effects of the utility model: The functional detection device for the helicopter DC power supply control component provided by the embodiment of the utility model includes a power supply module, an operation display unit, a main control unit, a discrete quantity / analog quantity acquisition unit, a 2A / 8A relay output unit, a high-precision resistance meter unit and a current sensor test unit arranged in a chassis; the device is powered by the power supply on the helicopter, and the DC power supply control component of the helicopter is electrically connected to the discrete quantity / analog quantity acquisition unit, the 2A / 8A relay output unit, the high-precision resistance meter unit and the current sensor test unit through a switching cable; the input on the operation display unit is used to provide corresponding detection control to the DC power supply control component, and the working state information of the DC power supply control component is displayed during the detection process to realize the functional detection of the DC power supply control component. The functional detection device provided by the embodiment of the utility model can detect whether the various working states of the DC power supply control component are qualified, and the purpose of functional detection of the helicopter DC power supply control component is achieved. In addition, the functional detection device provided by the embodiment of the utility model is used to realize the functional detection of the helicopter DC power supply control component, the detection result is clear, the human-computer interaction interface is friendly, and it is easy to operate and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide a further understanding of the technical solution of the utility model and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the utility model and do not constitute a limitation on the technical solution of the utility model.

[0029] Figure 1 A schematic structural diagram of a function detection device for a helicopter DC power supply control component provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the utility model more clear, the embodiments of the utility model will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other arbitrarily without conflict.

[0031] The above background technology has explained the function and important role of the helicopter DC power supply control component. When the helicopter is powered on on the ground or in flight, if the DC power supply control component fails to provide current to the load or fails to cut off the power supply circuit normally, the electrical equipment on the helicopter will not work or will be damaged, which will greatly affect flight safety.

[0032] In order to prevent safety problems caused by abnormal operation of a DC power supply control component of a helicopter, an embodiment of the utility model provides a function detection device for a DC power supply control component of a helicopter, which is used for detecting various functions in the DC power supply control component of a helicopter.

[0033] The utility model provides the following specific embodiments which can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0034] Figure 1 The present invention provides a schematic diagram of a functional detection device for a helicopter DC power supply control component. Figure 1 As shown, the functional detection device for a helicopter DC power supply control component provided by an embodiment of the utility model includes: a portable chassis, a power supply module, an operation display unit, a main control unit, a discrete quantity / analog quantity acquisition unit, a 2A / 8A relay output unit, a high-precision resistance meter unit and a current sensor test unit, and a switching cable.

[0035] The functional detection device for a helicopter DC power supply control component provided by an embodiment of the utility model is used to realize the detection of various functions in the helicopter DC power supply control component; wherein, the helicopter DC power supply control component is connected to the functional detection device through a conversion cable. In a specific implementation, the DC power supply control component is electrically connected to a discrete quantity / analog quantity acquisition unit, a 2A / 8A relay output unit, a high-precision resistance meter unit, and a current sensor test unit, respectively.

[0036] In an embodiment of the utility model, the power supply on the helicopter is connected to a power supply module, and the power supply module is respectively connected to the operation display unit and the main control unit. The power supply on the helicopter is converted into the working voltage of each unit in the function detection device through the power supply module, providing power supply support for the testing of the DC power supply control component.

[0037] The main control unit in the embodiment of the utility model is also electrically connected to the operation display unit, the discrete quantity / analog quantity acquisition unit, the 2A / 8A relay output unit, the high-precision resistance meter unit and the current sensor test unit, respectively, and provides corresponding detection control to the DC power supply control component through the required simulated working state input on the operation display unit, and displays the working state information of the DC power supply control component during the detection process, so as to realize the functional detection of the DC power supply control component.

[0038] In the specific implementation of the embodiment of the utility model, the main control unit communicates with each unit through the RS232 bus and the RS422 bus to realize the reception and transmission of control signals and status signals.

[0039] Specifically, the 2A / 8A relay output unit outputs the test voltage signal to the corresponding interface position of the DC power supply control component; the discrete quantity / analog quantity acquisition unit reads the data information of the optocoupler and AD acquisition module in the DC power supply control component and communicates with the main control unit; the high-precision ohmmeter unit detects the resistance values ​​of 10 resistors in the DC power supply control component; the current sensor test unit is used to test whether the working status of the Hall current sensor of the DC power supply control component is normal.

[0040] In one implementation of the present utility model, Figure 1 As shown, the power supply module includes: an AC / DC power supply unit, a DC / DC power supply unit, and a DC adjustable power supply unit connected to the AC / DC power supply unit and the DC / DC power supply unit respectively, and the DC adjustable power supply unit is also connected to the operation display unit and the main control unit respectively. The AC power supply (for example, AC220V) on the helicopter is connected to the AC / DC power supply unit, and the DC power supply (for example, DC28V) is connected to the DC / DC power supply unit. The AC / DC power supply unit converts the external input AC220V into an internal DC voltage, and the DC / DC power supply unit converts the external input DC28V into an internal DC voltage, and after the voltage conversion by the DC adjustable power supply unit, it provides power supply support for the test of the DC power supply control component.

[0041] In one implementation of an embodiment of the utility model, the AC / DC power supply unit includes an AC / DC power supply module, a diode, a (0-32V) DC / DC power supply module, a (+12V) power supply module and a (+5V) power supply module, which is used to convert the on-board AC220V AC power supply into one adjustable 0-32V DC power supply, one +12V DC power supply and one +5V DC power supply, and provide control voltage for the DC power supply control component, Hall current sensor and processor.

[0042] In one implementation of an embodiment of the utility model, the DC / DC power supply unit includes a diode, a (0-32V) DC / DC power supply module, a (+12V) power supply module and a (+5V) power supply module, which is used to convert the onboard DC28V direct power supply into one adjustable 0-32V direct power supply, one +12V direct power supply and one +5V direct power supply, providing control voltage for the DC power supply control component, Hall current sensor and processor.

[0043] In one implementation of the present utility model embodiment, the operation display unit can use a 10.1-inch integrated display panel to display the output data of the main control unit at a fixed position, and transmit the human body touching the screen position information to the main control unit through the RS232 interface.

[0044] In one implementation of the utility model, the main control unit is formed by a single-chip microcomputer and a corresponding design circuit, and is electrically connected to the operation display unit and the high-precision resistance meter unit through the RS232 interface, and is connected to the 2A / 8A relay output unit and the discrete / analog quantity acquisition unit through the RS422 interface. After the function detection device is powered on and started, the main control unit collects data from each unit in real time, and sends it to the operation display unit after processing; when the main control unit receives the information sent by each unit, it drives different units by determining the meaning expressed by different information; for example, driving the relay to work to realize the state change of the DC power supply control component, etc.

[0045] In one implementation of the present utility model, the discrete quantity / analog quantity acquisition unit includes an FPGA processor, an optical coupler, an AD sensor, and corresponding design circuits. The state signal of the DC power supply control component enters the optical coupler isolation after current limiting protection, and the optical coupler isolation data is read by the FPGA processor and then sent to the data processing unit through the RS422 interface. The analog quantity of the acquisition signal is converted into a digital quantity through the AD sensor, which is used to collect the DC voltage on the bus bar of the DC power supply control component.

[0046] In one implementation of the embodiment of the utility model, the 2A / 8A relay output unit includes an FPGA processor, a drive circuit, three 2A relays and one 8A relay. After the FPGA processor receives the control signal from the main control unit, it drives the relay to output a 28V / open signal or a ground / open signal to the DC power supply control component through the drive circuit, thereby realizing the control function test of the DC power supply control component.

[0047] In one implementation of the utility model embodiment, the high-precision resistance meter unit includes a DM4 high-precision intelligent digital display resistance meter, which can collect the resistance value in the DC power supply control component in real time and send it to the main control unit through the RS232 interface.

[0048] In one implementation of the utility model, the current sensor test unit includes a 2.8Ω resistor, a DC / DC power module and an I / V conversion module. The DC / DC power module provides working power to the Hall current sensor in the DC power control component, and loads 10A current through the resistor to make the current sensor output the detected current signal. The current signal transmits a voltage signal to the main control unit after passing through the I / V conversion module. The wiring relationship of the current sensor and whether the output voltage are normal are judged based on this voltage signal.

[0049] The functional detection device for the helicopter DC power supply control component provided by the embodiment of the utility model includes a power supply module, an operation display unit, a main control unit, a discrete quantity / analog quantity acquisition unit, a 2A / 8A relay output unit, a high-precision resistance meter unit and a current sensor test unit arranged in a chassis; the device is powered by the power supply on the helicopter, and the DC power supply control component of the helicopter is electrically connected to the discrete quantity / analog quantity acquisition unit, the 2A / 8A relay output unit, the high-precision resistance meter unit and the current sensor test unit through a switching cable; the input on the operation display unit is used to provide corresponding detection control to the DC power supply control component, and the working state information of the DC power supply control component is displayed during the detection process to realize the functional detection of the DC power supply control component. The functional detection device provided by the embodiment of the utility model can detect whether the various working states of the DC power supply control component are qualified, and the purpose of functional detection of the helicopter DC power supply control component is achieved. In addition, the functional detection device provided by the embodiment of the utility model is used to realize the functional detection of the helicopter DC power supply control component, the detection result is clear, the human-computer interaction interface is friendly, and it is easy to operate and use.

[0050] In the specific implementation, the helicopter DC power supply control component is connected to the function detection device through the adapter cable. After the detection device is powered on, the function to be tested is selected in the main interface of the operation display unit. The resistance test, diode test and current sensor test function module detection settings will automatically complete the test, and the logic test needs to be tested according to the prescribed operating steps. The test results will be displayed on the integrated display panel to achieve the purpose of detecting the function of the helicopter DC power supply control component.

[0051] The following is a description of the human-machine interaction method and test process of a function detection device for a helicopter DC power supply control component provided by the utility model.

[0052] (1) Human-computer interaction method:

[0053] The comprehensive display panel in the operation display unit is used to complete various test operations and result display of the DC power control component, realizing human-computer interaction. The comprehensive display panel is the operation interface when the DC power control component is tested, and the operation interface includes a resistance test function area, a diode test function area, a logic test function area, and a current sensor test function area. Among them, the resistance test function area is used to test the resistance value of the internal resistance of the DC power control component. After clicking to start the test, the resistance value will be displayed in the panel accordingly; the diode test function area is used to test the wiring status of the internal diode of the DC power control component and the forward conduction and reverse cutoff functions. After clicking to start the test, the diode status will be displayed in the panel accordingly; the logic test function area is the operation area when the DC power control component is tested, and the input voltage signal of the corresponding port is controlled by the virtual switch on the display panel, and the voltage signal output by the corresponding port is displayed by the indicator light on and off; in addition, the working voltage and busbar voltage of the DC power control component will be displayed on the right end of the display panel; the current sensor test function area is used to test the working status of the Hall current sensor inside the DC power control component. After clicking to start the test, the Hall current sensor status will be displayed in the panel.

[0054] The process of using the function detection device provided by the embodiment of the utility model to perform function detection on the helicopter DC power supply control component includes the following steps:

[0055] Step 1: After the system is powered on, the function detection device enters the main interface, and clicks the virtual switch on the display screen to enter the required test function area, including the above-mentioned resistance test function area, diode test function area, logic test function area and current sensor test function area;

[0056] Step 2: When performing the resistance status test, click the "Resistance Test" function area on the main interface to enter the resistance test interface, click to start the test, and the detection device automatically controls the input and output of the signal to complete the test and value display of the 10 resistors inside the DC power supply control component;

[0057] Step 3: When performing the diode status test, click the "Diode Test" function area on the main interface to enter the diode test interface, click to start the test, and the detection device automatically controls the input and output of the signal to complete the test and status display of the 10 diodes inside the DC power supply control component;

[0058] Step 4: When performing the internal control logic test of the DC power supply control component, click the "Logic Test" function area on the main interface to enter the logic test interface, and then turn on and off the display switch on the display panel (the display switches are marked with their own codes for distinction). When the switch is turned on, the data processing unit drives the 2A / 8A relay output unit to output a 28V / open signal or a ground / open signal to the internal contactor and relay light components of the DC power supply control component to turn on or off, and then collects the DC power supply control component status signal through the discrete quantity acquisition unit and sends it to the data processing unit, and finally displays it through the operation display unit. The same applies to the switch disconnection and connection. When all switches are connected and disconnected, the DC power supply control component logic test is completed.

[0059] Step 5: When performing the current sensor status test, click the "Current Sensor" function area on the main interface to enter the current sensor test interface, click to start the test, the detection device automatically controls the input and output of the signal, completes the test of the Hall current sensor inside the DC power supply control component and displays the numerical value of the current passing through the sensor at this time.

[0060] By adopting the function detection device provided in the embodiment of the utility model, the function detection of the helicopter DC power supply control component is realized, the detection result is clear, the human-computer interaction interface is friendly, and it is easy to operate and use.

[0061] Although the implementation methods disclosed in the utility model are as above, the content is only an implementation method adopted to facilitate the understanding of the utility model, and is not used to limit the utility model. Any technician in the field to which the utility model belongs can make any modifications and changes in the form and details of implementation without departing from the spirit and scope disclosed in the utility model, but the scope of patent protection of the utility model shall still be based on the scope defined in the attached claims.

Claims

1. A function detection device for a helicopter DC power supply control component, characterized in that: include: Chassis, power supply module, operation display unit, main control unit, discrete quantity / analog quantity acquisition unit, 2A / 8A relay output unit, high-precision resistance meter unit and current sensor test unit arranged in the chassis, and adapter cable; Among them, the DC power supply control component of the helicopter is electrically connected to the discrete quantity / analog quantity acquisition unit, the 2A / 8A relay output unit, the high-precision resistance meter unit and the current sensor test unit through the adapter cable; The power supply on the helicopter is connected to the power supply module, which is respectively connected to the operation display unit and the main control unit. The power supply on the helicopter is converted into the working voltage of each unit in the function detection device through the power supply module to provide power supply support for the test of the DC power supply control component; The main control unit is also electrically connected to the operation display unit, the discrete quantity / analog quantity acquisition unit, the 2A / 8A relay output unit, the high-precision resistance meter unit and the current sensor test unit, respectively, and provides corresponding detection control to the DC power supply control component through the input on the operation display unit, and displays the working status information of the DC power supply control component during the detection process, so as to realize the functional detection of the DC power supply control component.

2. The function detection device for a helicopter DC power supply control assembly according to claim 1, characterized in that: The power supply module includes: an AC / DC power supply unit, a DC / DC power supply unit, and a DC adjustable power supply unit respectively connected to the AC / DC power supply unit and the DC / DC power supply unit; The AC power supply on the helicopter is connected to the AC / DC power supply unit, and the on-board DC power supply is connected to the DC / DC power supply unit. The input AC power is converted into an internal DC power supply through the AC / DC power supply unit, and the input DC power is converted into an internal DC voltage through the DC / DC power supply unit. After the voltage conversion through the DC adjustable power supply unit, power supply support is provided for the test of the DC power supply control component.

3. The function detection device for a helicopter DC power supply control assembly according to claim 2, characterized in that: The main control unit is electrically connected to the discrete quantity / analog quantity acquisition unit, the 2A / 8A relay output unit, the high-precision resistance meter unit and the current sensor test unit through the bus, so as to realize the sending of control signals and the receiving of status signals between the DC power supply control component; Among them, the 2A / 8A relay output unit outputs the test voltage signal to the corresponding interface position of the DC power supply control component; Discrete quantity / analog quantity acquisition unit, reads the data information of the optocoupler and AD acquisition module in the DC power supply control component and communicates with the main control unit; High-precision resistance meter unit, to detect the resistance value of each resistor in the DC power supply control component; The current sensor test unit tests whether the working state of the Hall current sensor in the DC power supply control component is normal.

4. The function detection device for a helicopter DC power supply control assembly according to claim 3, characterized in that: The AC / DC power supply unit includes an AC / DC power supply module, a diode, a 0-32V DC / DC power supply module, a +12V power supply module and a +5V power supply module, and is used to convert the onboard AC220V power supply into one adjustable 0-32V DC power supply, one +12V DC power supply and one +5V DC power supply, and provide control voltage for the DC power supply control component, the Hall current sensor and the processor.

5. The function detection device for a helicopter DC power supply control assembly according to claim 3, characterized in that: The DC / DC power supply unit includes a diode, a 0-32V DC / DC power supply module, a +12V power supply module and a +5V power supply module, so as to convert the onboard +28V DC power supply into one adjustable 0-32V DC power supply, one +12V DC power supply and one +5V DC power supply through the AC / DC power supply unit, and provide control voltage for the DC power supply control component, the Hall current sensor and the processor.

6. The function detection device for a helicopter DC power supply control assembly according to claim 3, characterized in that: The discrete quantity / analog quantity acquisition unit includes an FPGA processor, an optocoupler, and an AD sensor. The status signal of the DC power supply control component enters the optocoupler isolation after current limiting protection, and the data of the optocoupler isolation is read by the FPGA processor and sent to the main control unit through the RS422 interface. The AD sensor completes the conversion of the analog quantity of the acquisition signal into a digital quantity, which is used to collect the DC voltage on the bus bar of the DC power supply control component.

7. The function detection device for a helicopter DC power supply control assembly according to claim 3, characterized in that: The 2A / 8A relay output unit includes an FPGA processor, a drive circuit, a 2A relay and an 8A relay; wherein, after the FPGA processor receives the control signal sent by the main control unit, it drives the relay through the drive circuit to output a 28V / open signal or a ground / open signal to the DC power supply control component, thereby realizing the control function test of the DC power supply control component.

8. The function detection device for a helicopter DC power supply control assembly according to claim 3, characterized in that: The high-precision resistance meter unit adopts a DM4 high-precision intelligent digital display resistance meter to collect the resistance value in the DC power supply control component in real time and send it to the main control unit through the RS232 interface.

9. The function detection device for a helicopter DC power supply control assembly according to claim 3, characterized in that: The current sensor test unit includes a resistor, a DC / DC power module and an I / V conversion module; the DC / DC power module provides working power to the Hall current sensor in the DC power control component, and a 10A current is loaded through the resistor to make the current sensor output a detected current signal. The current signal transmits a voltage signal to the main control unit after passing through the I / V conversion module; the voltage signal is used as a basis for judging whether the wiring relationship of the current sensor and the output voltage are normal.

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