An electronic flight instrument testing device

Abstract

The utility model relates to an electronic flight instrument testing arrangement, including signal processing module, voltage stabilizing module, AD conversion module, partial pressure filter module and current sensor, signal processing module's output end connects voltage stabilizing module's input, voltage stabilizing module's output end connects AD conversion module's input, AD conversion module's output end connects partial pressure filter module's input, partial pressure filter module's output end connects current sensor's input, and current sensor's output end feedback connection is connected to the public node of signal processing module, constructs closed loop regulation system through the feedback connection of current sensor, can realize the step -by -step processing to input signal, preliminary processing, voltage stabilizing, AD conversion, partial pressure filter, current detection, also can adjust signal processing state in real time through feedback, ensure the stability and detection accuracy of output signal, satisfy the high accuracy requirement of electronic flight instrument to test voltage, current parameter.

Description

Technical Field

[0001] This utility model relates to a testing device, and more particularly to an electronic flight instrument testing device. Background Technology

[0002] As the core of an aircraft's avionics system, the operational stability of electronic flight instruments directly depends on the accuracy of the power supply voltage and the stability of the load current. Therefore, during factory testing and maintenance verification, it is necessary to use dedicated equipment to simulate operating environments under different voltage and current conditions. The core deficiency of existing testing equipment lies in insufficient inter-module coordination and the lack of a closed-loop regulation mechanism. Traditional testing equipment often features independently designed signal processing, voltage regulation, and detection modules, connected only by simple wires, failing to form a systematic signal transmission link. Existing equipment generally lacks an effective closed-loop feedback mechanism; current detection results are merely recorded as independent data and cannot be used to influence the front-end signal processing module. This loosely connected module design, lacking closed-loop coordination, makes it difficult for existing testing equipment to meet the stringent requirements of electronic flight instruments for power supply accuracy and dynamic response, becoming a key bottleneck restricting test reliability. Therefore, constructing a collaborative architecture with orderly inter-module connections and closed-loop feedback functionality is a core requirement for improving the testing accuracy and safety of electronic flight instruments. Utility Model Content

[0003] The purpose of this invention is to provide an electronic flight instrument testing device to solve the problems existing in the prior art.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0005] An electronic flight instrument testing device includes a signal processing module, a voltage regulator module, an analog-to-digital converter module, a voltage divider and filter module, and a current sensor connected in sequence. The output of the signal processing module is connected to the input of the voltage regulator module. The signal processing module performs preliminary processing on the input signal F1 and outputs the processed signal to the voltage regulator module. The output of the voltage regulator module is connected to the input of the analog-to-digital converter module. The voltage regulator module stabilizes the input voltage and outputs it to the analog-to-digital converter module. The output of the analog-to-digital converter module is connected to the input of the voltage divider and filter module. The voltage divider and filter module performs analog-to-digital conversion on the stabilized voltage signal and outputs it to the voltage divider and filter module. The output of the voltage divider and filter module is connected to the input of the current sensor. The converted signal is divided and filtered before being output to the current sensor. The output of the current sensor is fed back to a common node where the signal processing module is located. It detects the current of the input electrical signal and provides a feedback electrical signal.

[0006] By adopting the above technical solution, a complete signal processing and detection link is formed by sequentially connecting modular components. Furthermore, a closed-loop regulation system is constructed through feedback connection of current sensors. This system can not only perform step-by-step processing of input signals, including preliminary processing, voltage stabilization, analog-to-digital conversion, voltage divider filtering, and current detection, but also adjust the signal processing state in real time through feedback to ensure the stability and detection accuracy of the output signal. This meets the high-precision requirements of electronic flight instruments for test voltage and current parameters, while also improving the device's adaptability to different types of instruments.

[0007] In a further embodiment, the signal processing module includes element D1, element 72, element C1, variable element D2, and capacitor C2; one end of element D1 is connected to the top common ground, and the other end of element D1 is connected to the upper end of element 72; the left side of element 72 receives the input signal F1, the lower end of element 72 is connected to one end of element C1, the right side is connected to the variable element D2, the other end of variable element D2 is connected to one end of capacitor C2, and one end of capacitor C2 is grounded; the other end of element C1 is connected to the common ground node.

[0008] By adopting the above technical solution, component D1 can use its unidirectional conductivity to limit the current direction of the input signal, avoiding reverse voltage damage to subsequent modules; component 72 can perform preliminary current and voltage characteristic adjustment on the input signal F1, and in conjunction with the filtering effect of component C1 and capacitor C2, effectively filter out low-frequency and high-frequency noise in the input signal; variable component D2 can flexibly adjust the branch parameters to adapt to input signals F1 of different amplitudes, improve the compatibility of the signal processing module, and provide a more stable input signal for the subsequent voltage regulation module.

[0009] In a further embodiment, the voltage regulator module includes a diode TVS1, a voltage regulator chip, a capacitor C3, and a resistor C9; the voltage regulator chip includes pins 1, 2, 3, and 4; one end of the diode TVS1 is connected to the top common ground, and the other end of the diode TVS1 is connected to the right main connection node; one end of the capacitor C3 is connected to the other end of the capacitor C2, the other end of the capacitor C3 is grounded, and the other end of the capacitor C3 is connected to pin 3 of the voltage regulator chip; the resistor C9 is connected between pins 3 and 4 of the voltage regulator chip; the output terminal of the voltage regulator chip is connected to one end of the resistor R4 and one end of the capacitor C8.

[0010] By adopting the above technical solution, diode TVS1 can quickly conduct when the circuit encounters transient overvoltage, and conduct the overvoltage energy to ground, protecting the voltage regulator chip and subsequent modules; capacitor C3 can further filter out the signal ripple input to the voltage regulator chip, improving the voltage regulation foundation; resistor C9, in conjunction with the pin of the voltage regulator chip, can accurately set the output voltage value to meet the power supply voltage requirements of different electronic flight instruments; the overall structure not only achieves stable voltage output, but also has overvoltage protection function, improving the safety of the device and the voltage regulation accuracy.

[0011] In a further embodiment, the analog-to-digital conversion module includes an analog-to-digital conversion chip, resistors R4, R5, and R9, and capacitor C8; one end of resistor R9 is connected to the output side of the voltage regulator chip, and the other end of resistor R9 is connected to pin 5 of the analog-to-digital conversion chip, and the other end of resistor R9 is also connected to one end of resistor R4; the other end of resistor R4 is connected to one end of resistor R5, and the other end of resistor R5 is connected to pin 6 of the analog-to-digital conversion chip; one end of capacitor C8 is connected to pin 4 of the voltage regulator chip.

[0012] By adopting the above technical solution, resistor R9 can limit the current flowing into the analog-to-digital converter chip, avoiding chip overload damage; resistors R4 and R5 form a voltage divider circuit, which proportionally reduces the voltage output by the voltage regulator module to an amplitude that matches the input range of the analog-to-digital converter chip, ensuring conversion accuracy; capacitor C8 can filter out high-frequency interference in the regulated output signal, reducing the noise impact during the analog-to-digital conversion process; the overall design enables the analog voltage signal to be accurately converted into a digital signal, providing a reliable basis for subsequent data processing and improving the accuracy of voltage detection.

[0013] In a further embodiment, the voltage divider filter module includes resistors R6, R7, and R8, capacitor C6, and capacitor C7; one end of resistor R6 is connected to the right main connection node, and the other end of resistor R6 is connected to one end of resistor R7, and the other end of resistor R6 is also connected to one end of capacitor C6; the other end of resistor R7 is connected to one end of resistor R8; the other end of resistor R8 is grounded; the other end of capacitor C6 is grounded; one end of capacitor C7 is connected to the right main connection node, and the other end of capacitor C7 is grounded; the connection point of resistors R7 and R8 is connected to the input pin of the current sensor.

[0014] By adopting the above technical solution, resistors R6, R7, and R8 form a multi-stage voltage divider network, which can accurately adjust the signal amplitude of the input current sensor and adapt to the sensor's detection range. Capacitor C7 performs overall filtering on the signal of the main connection node, and capacitor C6 further reduces noise in the voltage-divided signal, effectively reducing high-frequency noise and fluctuations in the signal. The overall structure ensures that the signal of the input current sensor is pure and the amplitude is accurate, providing a stable input basis for current detection and improving the reliability of current detection.

[0015] In a further embodiment, the input pin of the current sensor is connected to the connection point of resistors R7 and R8, and the output line of the current sensor is connected back to the common node where the signal processing module is located.

[0016] By adopting the above technical solution, the current sensor can detect the signal current after voltage division and filtering in real time and accurately obtain the current parameters in the circuit. Its output side line is connected to the common node of the signal processing module to form a closed-loop feedback, which enables the signal processing module to dynamically adjust the processing method of the input signal F1 according to the current detection result, realize the real-time optimization of the circuit working state, ensure the stability of the current parameters during the electronic flight instrument test, and respond quickly when the current is abnormal, thereby improving the safety of the test device.

[0017] In summary, this utility model has the following beneficial effects:

[0018] 1. Resistor R9 limits the current flowing into the analog-to-digital converter chip, preventing overload damage; resistors R4 and R5 form a voltage divider circuit, proportionally reducing the voltage output of the voltage regulator module to an amplitude suitable for the input range of the analog-to-digital converter chip, ensuring conversion accuracy; capacitor C8 filters out high-frequency interference in the regulated output signal, reducing noise during the analog-to-digital conversion process; the overall design enables the analog voltage signal to be accurately converted into a digital signal, providing a reliable basis for subsequent data processing and improving the accuracy of voltage detection. Attached Figure Description

[0019] Figure 1 This is the overall flowchart of this utility model;

[0020] Figure 2 This is the overall circuit diagram of this utility model. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings.

[0022] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to the attached figures. Figure 1In this specification, the terms "bottom surface" and "top surface," "inner" and "outer" refer to the direction toward or away from the geometry of a specific component. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this specification, "a plurality of" means two or more, unless otherwise explicitly and specifically defined by the direction of the center.

[0023] Example 1:

[0024] like Figures 1-2 As shown, an electronic flight instrument testing device includes a signal processing module, a voltage regulator module, an analog-to-digital converter module, a voltage divider and filter module, and a current sensor connected in sequence. The output of the signal processing module is connected to the input of the voltage regulator module. The signal processing module performs preliminary processing on the input signal F1 and outputs the processed signal to the voltage regulator module. The output of the voltage regulator module is connected to the input of the analog-to-digital converter module. The voltage regulator module stabilizes the input voltage and outputs it to the analog-to-digital converter module. The output of the analog-to-digital converter module is connected to the input of the voltage divider and filter module. The voltage regulator module performs analog-to-digital conversion on the stabilized voltage signal and outputs it to the voltage divider and filter module. The output of the voltage divider and filter module is connected to the input of the current sensor. The current sensor performs voltage division and filtering on the converted signal and outputs it to the current sensor. The output of the current sensor is fed back to the common node where the signal processing module is located. The current sensor detects the current of the input electrical signal and feeds back the electrical signal.

[0025] The signal processing module includes component D1, component 72, component C1, variable component D2, and capacitor C2; one end of component D1 is connected to the top common ground, and the other end of component D1 is connected to the upper end of component 72; the left side of component 72 is connected to the input signal F1, the lower end of component 72 is connected to one end of component C1, and the right side is connected to variable component D2. The other end of variable component D2 is connected to one end of capacitor C2, and one end of capacitor C2 is grounded; the other end of component C1 is connected to the common ground node.

[0026] The voltage regulator module includes a diode TVS1, a voltage regulator chip, a capacitor C3, and a resistor C9. The voltage regulator chip has pins 1, 2, 3, and 4. One end of the diode TVS1 is connected to the top common ground, and the other end of the diode TVS1 is connected to the right main connection node. One end of the capacitor C3 is connected to the other end of the capacitor C2, and the other end of the capacitor C3 is grounded. The other end of the capacitor C3 is connected to pin 3 of the voltage regulator chip. The resistor C9 is connected between pins 3 and 4 of the voltage regulator chip. The output terminal of the voltage regulator chip is connected to one end of the resistor R4 and one end of the capacitor C8.

[0027] The analog-to-digital converter module includes an analog-to-digital converter chip, resistors R4, R5, and R9, and capacitor C8. One end of resistor R9 is connected to the output side of the voltage regulator chip, and the other end of resistor R9 is connected to pin 5 of the analog-to-digital converter chip. The other end of resistor R9 is also connected to one end of resistor R4. The other end of resistor R4 is connected to one end of resistor R5, and the other end of resistor R5 is connected to pin 6 of the analog-to-digital converter chip. One end of capacitor C8 is connected to pin 4 of the voltage regulator chip.

[0028] The voltage divider filter module includes resistors R6, R7, and R8, and capacitors C6 and C7. One end of resistor R6 is connected to the main connection node on the right, and the other end of resistor R6 is connected to one end of resistor R7, which is also connected to one end of capacitor C6. The other end of resistor R7 is connected to one end of resistor R8. The other end of resistor R8 is grounded. The other end of capacitor C6 is grounded. One end of capacitor C7 is connected to the main connection node on the right, and the other end of capacitor C7 is grounded. The connection point between resistors R7 and R8 is connected to the input pin of the current sensor, and the input pin of the current sensor is connected to the connection point between resistors R7 and R8. The output line of the current sensor is connected back to the common node where the signal processing module is located.

[0029] Specific implementation process: The operation of the electronic flight instrument test device begins with the external input signal F1 entering the signal processing module. The input signal F1 first enters the left side of component 72. Component 72 performs preliminary current and voltage characteristic adjustments on the signal. Component D1 connected to its upper end uses unidirectional conductivity to limit the direction of signal current and avoid reverse voltage impact on subsequent modules. Component C1 connected to the lower end of component 72 cooperates with the grounding node to perform preliminary filtering on the signal to reduce low-frequency ripple. The variable component D2 connected to the right side can change the branch parameters by adjusting the resistance value to adapt to input signals of different amplitudes. The capacitor C2 connected to the other end of the variable component D2 further filters out high-frequency noise. After the preliminary processing by the signal processing module, the relatively stable signal is transmitted to the input end of the voltage regulator module. After entering the voltage regulator module, one end of diode TVS1 is connected to the top common ground, and the other end is connected to the right main connection node. In the event of a transient overvoltage, it quickly conducts to direct energy to ground, providing protection. One end of capacitor C3 is connected to the other end of the preceding capacitor C2, and the other end is grounded and connected to pin 3 of the voltage regulator chip, further filtering signal ripple and providing a stable input to the voltage regulator chip. The voltage regulator chip sets the output voltage through resistor C9 between pins 3 and 4. After stabilizing the input voltage, it transmits it from the output terminal to the analog-to-digital converter module through resistor R4 and capacitor C8. In the analog-to-digital converter module, one end of resistor R9 is connected to the output side of the voltage regulator chip, and the other end is connected to pin 5 of the analog-to-digital converter chip and also to one end of resistor R4, limiting the current flowing into the chip to avoid overload. Resistors R4 and R5 are connected in series to proportionally divide the regulated voltage to an amplitude suitable for the input range of the analog-to-digital converter chip. The other end of resistor R5 is connected to pin 6 of the chip, working with capacitor C8 to filter high-frequency interference. After the analog-to-digital converter chip converts the analog signal into a digital signal, it transmits it to the voltage divider and filter module through the output terminal. In the voltage divider and filter module, one end of resistor R6 is connected to the main connection node on the right, and the other end is connected to resistor R7 and capacitor C6. Resistor R7 and resistor R8 are connected in series and then grounded, forming a multi-stage voltage divider network to precisely adjust the signal amplitude. One end of capacitor C7 is connected to the main connection node, and the other end is grounded. Together with capacitor C6, they filter and reduce noise for the main signal and the voltage-divided signal, respectively. The processed signal is transmitted from the connection point of resistors R7 and R8 to the input pin of the current sensor. After the current sensor detects the current parameter of the input signal, it transmits the feedback signal back to the common node where the signal processing module is located through the output side line. This allows the signal processing module to dynamically adjust parameters such as variable element D2 based on the feedback current information, realizing closed-loop regulation of the entire device. This ensures a stable and accurate test voltage and current environment for the electronic flight instrument, and also provides timely response in case of current abnormalities, ensuring the safety and reliability of the testing process.

[0030] In the embodiments disclosed in this utility model, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments disclosed in this utility model according to the specific circumstances.

[0031] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. An electronic flight instrument testing device, characterized in that, The system includes a signal processing module, a voltage regulator module, an analog-to-digital converter (ADC) module, a voltage divider and filter module, and a current sensor, connected in sequence. The output of the signal processing module is connected to the input of the voltage regulator module. The signal processing module performs preliminary processing on the input signal F1 and outputs the processed signal to the voltage regulator module. The output of the voltage regulator module is connected to the input of the ADC module. The voltage regulator module stabilizes the input voltage and outputs it to the ADC module. The output of the ADC module is connected to the input of the voltage divider and filter module. The voltage divider and filter module performs analog-to-digital conversion on the stabilized voltage signal and outputs it to the voltage divider and filter module. The output of the voltage divider and filter module is connected to the input of the current sensor. The converted signal is divided and filtered before being output to the current sensor. The output of the current sensor is fed back to the common node where the signal processing module is located. It detects the current in the input electrical signal and provides a feedback electrical signal.

2. The electronic flight instrument testing device according to claim 1, characterized in that: The signal processing module includes component D1, component 72, component C1, variable component D2, and capacitor C2; one end of component D1 is connected to the top common ground, and the other end of component D1 is connected to the upper end of component 72; the left side of component 72 receives the input signal F1, the lower end of component 72 is connected to one end of component C1, the right side is connected to the variable component D2, the other end of variable component D2 is connected to one end of capacitor C2, and one end of capacitor C2 is grounded; the other end of component C1 is connected to the common ground node.

3. The electronic flight instrument testing device according to claim 2, characterized in that: The voltage regulator module includes a diode TVS1, a voltage regulator chip, a capacitor C3, and a resistor C9. The voltage regulator chip includes pins 1, 2, 3, and 4. One end of the diode TVS1 is connected to the top common ground, and the other end of the diode TVS1 is connected to the right main connection node. One end of the capacitor C3 is connected to the other end of the capacitor C2, and the other end of the capacitor C3 is grounded. The other end of the capacitor C3 is connected to pin 3 of the voltage regulator chip. The resistor C9 is connected between pins 3 and 4 of the voltage regulator chip. The output terminal of the voltage regulator chip is connected to one end of the resistor R4 and one end of the capacitor C8.

4. The electronic flight instrument testing device according to claim 3, characterized in that: The analog-to-digital conversion module includes an analog-to-digital conversion chip, resistors R4, R5, and R9, and capacitor C8. One end of resistor R9 is connected to the output side of the voltage regulator chip, and the other end of resistor R9 is connected to pin 5 of the analog-to-digital conversion chip. The other end of resistor R9 is also connected to one end of resistor R4. The other end of resistor R4 is connected to one end of resistor R5, and the other end of resistor R5 is connected to pin 6 of the analog-to-digital conversion chip. One end of capacitor C8 is connected to pin 4 of the voltage regulator chip.

5. The electronic flight instrument testing device according to claim 1, characterized in that: The voltage divider filter module includes resistors R6, R7, and R8, capacitors C6 and C7; one end of resistor R6 is connected to the right main connection node, and the other end of resistor R6 is connected to one end of resistor R7, which is also connected to one end of capacitor C6; the other end of resistor R7 is connected to one end of resistor R8; the other end of resistor R8 is grounded; the other end of capacitor C6 is grounded; one end of capacitor C7 is connected to the right main connection node, and the other end of capacitor C7 is grounded; the connection point of resistors R7 and R8 is connected to the input pin of the current sensor.

6. The electronic flight instrument testing device according to claim 5, characterized in that: The input pin of the current sensor is connected to the connection point of resistors R7 and R8, and the output line of the current sensor is connected back to the common node where the signal processing module is located.

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