Rotor heating insulation resistance measuring instrument suitable for multi-type helicopters

Abstract

The utility model relates to a kind of rotor heating insulation resistance measuring instrument suitable for multiple models of helicopter, including shell, heating resistance measurement module, insulation resistance measurement module, power module, power management board and passage knob switch, the heating resistance measurement module, insulation resistance measurement module, power module, power management board are all installed in the inside of shell, the resistance management board is in parallel with heating resistance measurement module and insulation resistance measurement module, the shell rear side is equipped with first test interface and second test interface, the first test interface and second test interface are respectively integrated with multiple heating resistance detection pin foot and multiple insulation resistance detection pin foot, the shell top is provided with two passage knob switches and two display screens, the power module is electrically connected with power management board, the utility model has generalization, modularization, miniaturization design thought, with overall volume is small, light in weight, it is easy to carry and the characteristics such as.

Description

Technical Field

[0001] This utility model relates to the field of helicopter rotor heating resistance measurement technology, specifically a rotor heating insulation resistance measuring instrument applicable to multiple helicopter models. Background Technology

[0002] To ensure safety during flight, helicopters incorporate a heating system within their rotor blades to prevent icing in low-temperature conditions. During routine maintenance and troubleshooting, it's necessary to test the resistance of the heating resistors in the heating circuit. The original method involved using a multimeter to measure the heating resistance between corresponding pins in the heating circuit and a megohmmeter to test the insulation resistance between the helicopter rotor blade heating circuit and the casing. Using these meters required frequent contact replacements, making the process cumbersome and unable to provide rapid measurements of the heating and insulation resistances. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a rotor heating insulation resistance measuring instrument applicable to multiple helicopter models, addressing the above-mentioned shortcomings.

[0004] To solve the above technical problems, the present invention adopts the following technical solution:

[0005] A rotor heating and insulation resistance measuring instrument suitable for multiple helicopter models includes a housing, a heating resistance measuring module, an insulation resistance measuring module, a power supply module, a power management board, and a channel rotary switch. The heating resistance measuring module, insulation resistance measuring module, power supply module, and power management board are all mounted inside the housing. The heating resistance measuring module and insulation resistance measuring module are connected in parallel on the resistance management board. The power management board outputs corresponding current and voltage to the heating resistance measuring module and insulation resistance measuring module, respectively. A first test interface and a second test interface are respectively provided on the rear side of the housing for electrical connection with the heating resistance measuring module and insulation resistance measuring module. The first test interface and the second test interface respectively integrate multiple heating resistance detection pins and multiple insulation resistance detection pins. The heating resistance detection pin is used to connect to the detection points at both ends of multiple different heating resistances in the heating resistance circuit via a heating test cable. The insulation resistance detection pin is used to connect to the resistance detection points at one end of multiple different heating resistance circuits and the resistance detection points on the housing via an insulation test cable. The top of the housing is provided with two channel rotary switches and two displays. The two channel rotary switches are electrically connected to the first test interface and the second test interface, respectively. By rotating the channel rotary switches, the pins connected to the corresponding measurement module of the corresponding test interface can be changed, thereby changing the heating resistance or insulation resistance to be tested in the helicopter connected to the measurement circuit. The heating resistance measurement module and the insulation resistance measurement module are each electrically connected to a display screen. The power module is electrically connected to the power management board.

[0006] Furthermore, the heating resistance measurement module includes a first analog-to-digital conversion module, a voltage detection module, and a constant current source module. The power management board, the constant current source module, the first test interface, the first analog-to-digital conversion module, and a display screen are sequentially and electrically connected. The voltage detection module is connected in parallel with the first test interface and is electrically connected to the first analog-to-digital conversion module.

[0007] Furthermore, the insulation resistance measurement module includes a second analog-to-digital conversion module, a current detection module, and a boost control module. The power management board, boost control module, second detection interface, current detection module, second analog-to-digital conversion module, and a display screen are sequentially and electrically connected.

[0008] Furthermore, the input voltage of the heating resistance measurement module is 4V, and the input voltage of the insulation resistance measurement module is 12V.

[0009] Furthermore, the housing is equipped with a voltage rotary switch electrically connected to the boost control module. By rotating the voltage rotary switch, the voltage output by the boost control module can be changed.

[0010] Compared with the prior art, the present invention, by adopting the above technical solution, has the following advantages:

[0011] This invention allows for the separate adjustment of the measurement channels of the heating resistance measurement module and the insulation resistance measurement module via two channel rotary switches, eliminating the need for frequent replacement of detection contacts and enabling rapid measurement of multiple heating resistances and insulation resistances in a helicopter.

[0012] This utility model features a universal, modular, and miniaturized design, and is characterized by its small overall size, light weight, and portability.

[0013] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the module connection relationship of this utility model;

[0015] Figure 2 This is a schematic diagram showing the connection relationship of the heating resistance detection module;

[0016] Figure 3 This is a schematic diagram showing the connection relationship of the insulation resistance detection module;

[0017] Figure 4 This is a schematic top view of the shell.

[0018] The attached diagram lists the components represented by each number as follows:

[0019] 1. Housing; 2. Channel rotary switch; 3. Display screen; 4. Voltage rotary switch. Detailed Implementation

[0020] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0021] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] like Figure 1-4As shown, a rotor heating insulation resistance measuring instrument suitable for multiple helicopter models includes a housing 1, a heating resistance measuring module, an insulation resistance measuring module, a power supply module, a power management board, and a channel rotary switch 2. The heating resistance measuring module, insulation resistance measuring module, power supply module, and power management board are all installed inside the housing 1. The heating resistance measuring module and insulation resistance measuring module are connected in parallel on the resistance management board. The power management board outputs corresponding current and voltage to the heating resistance measuring module and insulation resistance measuring module. A first test interface and a second test interface are respectively provided on the rear side of the housing 1 for electrical connection with the heating resistance measuring module and insulation resistance measuring module. The first test interface and the second test interface respectively integrate multiple heating resistance detection pins and multiple insulation resistance detection pins. The heating resistance detection pin is used to connect to the detection points at both ends of multiple different heating resistances in the heating resistance circuit via a heating test cable. The insulation resistance detection pin is used to connect to the resistance detection points at one end of multiple different heating resistance circuits and the resistance detection points on the housing via an insulation test cable. The top of the housing 1 is provided with two channel rotary switches 2 and two display screens 3. The two channel rotary switches 2 are electrically connected to the first test interface and the second test interface, respectively. By rotating the channel rotary switches 2, the pins connected to the corresponding measurement module of the corresponding test interface can be changed, thereby changing the heating resistance or insulation resistance to be tested in the helicopter connected to the measurement circuit. The heating resistance measurement module and the insulation resistance measurement module are electrically connected to a display screen 3, respectively. The power module is electrically connected to the power management board.

[0023] In one implementation, the heating resistance measurement module includes a first analog-to-digital conversion module, a voltage detection module, and a constant current source module. The power management board, the constant current source module, the first test interface, the first analog-to-digital conversion module, and a display screen are sequentially and electrically connected. The voltage detection module is connected in parallel with the first test interface and is electrically connected to the first analog-to-digital conversion module.

[0024] In one implementation, the insulation resistance measurement module includes a second analog-to-digital conversion module, a current detection module, and a boost control module. The power management board, boost control module, second detection interface, current detection module, second analog-to-digital conversion module, and a display screen are sequentially and electrically connected.

[0025] In one implementation, the input voltage of the heating resistance measuring module is 4V, and the input voltage of the insulation resistance measuring module is 12V.

[0026] In one embodiment, the housing 1 is provided with a voltage rotary switch 4 that is electrically connected to the boost control module. By rotating the voltage rotary switch 4, the voltage output of the boost control module can be changed.

[0027] In this utility model: the dimensions of the shell 1 (length × width × height) are 339±2mm × 209±2mm × 83±2mm;

[0028] The power module includes a cryogenic battery (rated voltage 7.4V, capacity 5AH), a power switch, and an AC-DC power supply. The cryogenic battery pack has a pre-installed heating module for auxiliary heating during cryogenic charging. The AC-DC power supply is the main power module for AC power supply, providing power to the entire device. The AC-DC power supply model is: Angding AC-DC Module Power Supply.

[0029] The power management board is used for battery charging and discharging management, automatic switching between battery power and AC power, and power supply to other circuit modules. The power management board provides battery level indication signals, using three indicator lights (high, medium, and low) to show the battery level status.

[0030] Channel rotary switch 2 is a multi-layer 24-channel switch with 1-5 pins for insulation resistance. When testing the insulation resistance of the main rotor, pin 5 is connected to the other four pins to detect the insulation resistance. When testing the insulation resistance of the tail rotor, pin 1 is the shell pin connected to the rotor housing. The channel rotary switch detects the insulation resistance between the heating resistor circuit and the rotor housing by connecting pin 1 and pin 3.

[0031] The heating resistor circuit has 1-20 pins. When testing the heating resistor of the main rotor, pin 5 is connected to pins 1, 2, 3, and 4 respectively to test the heating resistor. When testing the heating resistor of the tail rotor, pin 3 is connected to pins 1 and 2 respectively to test the heating resistor.

[0032] The voltage knob switch has voltage settings of 50V, 100V, 250V, and 500V;

[0033] The constant current source module is used to output a stable current to the circuit under test and the voltage detection module. The voltage detection module is used to detect the voltage of the circuit under test and output the detected voltage data to the first analog-to-digital converter module. The first analog-to-digital converter module is used to output the voltage data to the display screen 3 for display. The constant current source module model is: AP51656 step-down constant current module, the voltage detection module model is: JCXD 0-5A AC current detection module, and the first analog-to-digital converter module model is: ADS1115.

[0034] The boost control module is used to adjust the voltage of the insulation resistance circuit, the current detection module is used to detect the current of the insulation resistance circuit and output the detected current data to the second analog-to-digital converter module, the second analog-to-digital converter module is used to convert the current data and output it to the display screen 3 for display. The boost control module model is: HRBXXXXXD-XW, the current detection module model is: JCXD 0-5A AC current detection module, and the second analog-to-digital converter module model is: ADS1115.

[0035] The working process of this utility model is as follows: First, turn on the power switch;

[0036] 1. The steps for measuring the resistance temperature under heating are as follows:

[0037] Connect the test cable to the first test port on the rear side of housing 1 to test the heating resistance of the helicopter rotor heating circuit.

[0038] Rotate the rotary switch 2 on the top of housing 1 to control the heating resistor circuit and select the heating resistor measurement channel.

[0039] The power management board outputs current to the constant current source module in the heating resistor measurement module, and the constant current source module outputs a stable current to the circuit under test and the voltage detection module connected in parallel with it.

[0040] The voltage detection module detects the voltage across the circuit under test and outputs the detected voltage data to the first analog-to-digital converter module.

[0041] After receiving the voltage data, the first analog-to-digital converter module converts it into a format that can be displayed on the display screen 3 and outputs it to the corresponding display screen 3 to display the heating resistor measurement results. According to Ohm's law, the resistance can be calculated given the current and voltage. On the other hand, it can adjust the output current of the constant current source module according to the voltage conditions to ensure the accuracy of the measurement.

[0042] 2. The steps for measuring insulation resistance are as follows:

[0043] Connect the test cable to the second test interface on the rear side of housing 1 to test the insulation resistance between the helicopter rotor blade heating circuit and housing 1.

[0044] Rotate the rotary switch 2 on the top of housing 1 to control the insulation resistance circuit and select the insulation resistance measurement channel.

[0045] The voltage level of the boost control module can be manually adjusted by the voltage rotary switch 4 on the housing 1. The boost control module controls the voltage of the insulation resistance circuit to a suitable value.

[0046] The current detection module detects the current in the insulation resistance circuit and outputs the detected current data to the second analog-to-digital conversion module.

[0047] After receiving the current data, the second analog-to-digital converter module converts it into a format that can be displayed on the display screen 3 and outputs it to the corresponding display screen 3 to display the insulation resistance measurement result. According to Ohm's law, the insulation resistance can be calculated given the voltage and current. At the same time, the voltage of the boost control module is adjusted according to the current to ensure accurate measurement.

[0048] The above description provides examples of the preferred embodiments of this utility model. Any aspects not detailed herein are common knowledge to those skilled in the art. The scope of protection of this utility model is determined by the claims. Any equivalent modifications based on the technical teachings of this utility model are also within the scope of protection of this utility model.

Claims

1. A rotor heating insulation resistance measuring instrument applicable to multiple helicopter models, characterized in that, The system includes a housing (1), a heating resistance measurement module, an insulation resistance measurement module, a power supply module, a power management board, and a channel rotary switch (2). The heating resistance measurement module, insulation resistance measurement module, power supply module, and power management board are all installed inside the housing (1). The heating resistance measurement module and insulation resistance measurement module are connected in parallel on the resistance management board. The power management board outputs corresponding current and voltage to the heating resistance measurement module and insulation resistance measurement module. The rear side of the housing (1) has a first test interface and a second test interface for electrical connection with the heating resistance measurement module and insulation resistance measurement module, respectively. The first test interface and the second test interface integrate multiple heating resistance detection pins and multiple insulation resistance detection pins, respectively. The heating resistance detection pins are used for... The heating test cable is connected to the detection points at both ends of multiple different heating resistors in the heating resistor circuit. The insulation resistance detection pin is used to connect to the resistance detection points at one end of multiple different heating resistor circuits and the resistance detection points on the housing through the insulation test cable. The top of the housing (1) is provided with two channel rotary switches (2) and two display screens (3). The two channel rotary switches (2) are electrically connected to the first test interface and the second test interface, respectively. By rotating the channel rotary switch (2), the pins of the corresponding test interface connected to the corresponding measurement module can be changed, thereby changing the heating resistor or insulation resistance to be tested in the helicopter connected to the measurement circuit. The heating resistor measurement module and the insulation resistance measurement module are electrically connected to a display screen (3), respectively. The power module is electrically connected to the power management board.

2. The rotor heating insulation resistance measuring instrument applicable to multiple helicopter models according to claim 1, characterized in that, The heating resistance measurement module includes a first analog-to-digital conversion module, a voltage detection module, and a constant current source module. The power management board, the constant current source module, the first test interface, the first analog-to-digital conversion module, and a display screen (3) are sequentially and electrically connected. The voltage detection module is connected in parallel with the first test interface and is electrically connected to the first analog-to-digital conversion module.

3. The rotor heating insulation resistance measuring instrument applicable to multiple helicopter models according to claim 1, characterized in that, The insulation resistance measurement module includes a second analog-to-digital conversion module, a current detection module, and a boost control module. The power management board, boost control module, second detection interface, current detection module, second analog-to-digital conversion module, and a display screen (3) are sequentially electrically connected.

4. The rotor heating insulation resistance measuring instrument applicable to multiple helicopter models according to claim 1, characterized in that, The input voltage of the heating resistance measurement module is 4V, and the input voltage of the insulation resistance measurement module is 12V.

5. The rotor heating insulation resistance measuring instrument applicable to multiple helicopter models according to claim 3, characterized in that, The housing (1) is provided with a voltage rotary switch (4) electrically connected to the boost control module. By rotating the voltage rotary switch (4), the voltage output of the boost control module can be changed.

Images