Fly-by-wire data acquisition system

Abstract

The utility model discloses a telex data acquisition system, relates to the technical field of data acquisition, and aims to solve the problems of troublesome detection process, low detection efficiency and difficulty in fault pre-judgment of airplane telex data at present. The output end of the acquisition host is connected with a handheld panel, data communication connection is established between the acquisition host and the handheld panel, and the input end of the acquisition host is connected with an analog signal transmission cable; the acquisition host comprises a cross matrix unit, and the input end of the cross matrix unit is connected with an analog signal transmission cable; the signal acquisition unit is in data communication connection with the cross matrix unit; the communication control unit is in data communication connection with the signal acquisition unit, and the control end of the communication control unit is connected with the signal acquisition unit and the cross matrix unit; and the output end of the communication control unit is connected with the handheld tablet computer through Ethernet communication.

Description

Technical Field

[0001] The utility model relates to the technical field of data collection, in particular to a telex data collection system. Background Art

[0002] Fly-by-wire data refers to the analog quantity in the aircraft's fly-by-wire system detection plug. The detection of aircraft fly-by-wire data enables operators or programs to judge the quality of the signal, and then predict aircraft failures, so that aircraft failures occur on the ground, avoiding the aircraft from taking off with a fault, and further ensuring the safety of the aircraft's flight.

[0003] The telex data that needs to be tested on the aircraft include: testing the model in the plug; presenting redundant signals of the same name and multiple real-time curves on the same graphical interface; the presentation of redundant signals of the same name should facilitate the operator to visually detect the consistency between the redundant signals; the presentation of redundant signals of the same name provides the operator with the function of setting thresholds and software self-judgment; non-redundancy signals are presented in real-time curves; discrete quantity signals are displayed on the graphical interface in the form of switches.

[0004] At present, for the detection of fly-by-wire data on aircraft, usually the inspectors use handheld instruments to check each inspection port one by one. This is not only troublesome, but also has very low detection efficiency. In addition, the existing detection can only detect faults that have already occurred, but it is difficult to predict faults that will occur. Utility Model Content

[0005] In order to solve the above problems, namely, the current detection process of aircraft fly-by-wire data is cumbersome, the detection efficiency is low, and the fault prediction is difficult, the utility model proposes a fly-by-wire data acquisition system, which includes a collection host, the output end of the collection host is connected to a handheld tablet, a data communication connection is established between the collection host and the handheld tablet, and the input end of the collection host is connected to an analog signal transmission cable; the collection host includes:

[0006] A power supply unit for supplying power to the system;

[0007] A cross matrix unit, whose input end is connected to the analog signal transmission cable, is used to select all signals from the detection port of each detected device unit;

[0008] A signal acquisition unit, which establishes a data communication connection with the cross matrix unit, so as to condition and acquire quantization of the signal selected by the cross matrix;

[0009] A communication control unit establishes a data communication connection with the signal acquisition unit to obtain the conversion results in the signal acquisition unit. The control end of the communication control unit is connected to the signal acquisition unit and the cross matrix unit to configure the path of the cross matrix unit and control the signal acquisition unit; the output end of the communication control unit is connected to the handheld tablet via Ethernet communication for data transmission.

[0010] The utility model is further configured as follows: the power supply unit includes a DC / DC conversion circuit for converting the voltage into the voltage required by each unit, and also includes a positive-negative voltage conversion circuit.

[0011] The utility model is further configured as follows: four cross matrix units are provided, and the four cross matrix units are independent of each other; and the cross matrix units are arranged in layers.

[0012] The utility model is further configured as follows: the cross matrix unit includes a preprocessing circuit, the output end of the preprocessing circuit is connected to a SPDT circuit, the output end of the SPDT circuit is connected to a SP8T circuit, and the output end of the SP8T circuit is connected to the signal acquisition unit.

[0013] The utility model is further configured as follows: the signal acquisition unit includes a filter circuit 1, the input end of the filter circuit 1 is connected to the SP8T circuit, the output end of the filter circuit 1 is connected to a conditioning circuit, the conditioning circuit is used to adjust the signal amplitude, the output end of the conditioning circuit is connected to a filter circuit 2, and the output end of the filter circuit 2 is connected to an analog-to-digital conversion circuit.

[0014] The utility model is further configured as follows: the communication control unit includes a microprocessor circuit and a communication circuit, the microprocessor circuit is connected to the analog-to-digital conversion circuit for obtaining control information, the control end of the microprocessor circuit is connected to the cross matrix unit, the conditioning circuit and the control end of the analog-to-digital conversion circuit for controlling them; the output end of the communication circuit is connected to the handheld tablet via Ethernet communication for data transmission.

[0015] The beneficial effects of the utility model are:

[0016] 1. Through the cooperation of the cross matrix unit, the signal acquisition unit and the communication control unit, it is possible to collect signals from multiple detection ports at the same time, thereby making the detection process more convenient and efficient, and further enabling the prediction of faults.

[0017] 2. By setting up the conditioning circuit, the automatic gain change of the input signal can be realized to ensure that the signal can enter the analog-to-digital conversion circuit completely. At the same time, through the action of the filter circuit one and the filter circuit two, the high-frequency interference signal introduced during the signal transmission process can be filtered out to avoid misjudgment caused by the interference signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is shown in the structural diagram.

[0019] Figure 2 A schematic diagram showing the structure of a power supply unit.

[0020] Figure 3 A schematic diagram of the structure of a cross matrix unit is shown.

[0021] Figure 4 A structural schematic diagram of a signal acquisition unit is shown.

[0022] Figure 5 The figure shows the redundant homonymous signal testing process diagram.

[0023] Figure 6 The figure shows the process diagram of the redundancy-free signal test.

[0024] Figure 7 A diagram of the discrete signal testing process is shown.

[0025] Figure numerals: 1. Power supply unit; 11. Protection circuit; 12. DC / DC conversion circuit; 13. Positive and negative voltage conversion circuit; 2. Cross matrix unit; 21. Preprocessing circuit; 22. SPDT circuit; 23. SP8T circuit; 3. Signal acquisition unit; 31. Filter circuit one; 32. Conditioning circuit; 33. Filter circuit two; 34. Analog-to-digital conversion circuit; 4. Communication control unit. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0027] The utility model proposes a telex data detection system, including a collection host, the output end of the collection host is electrically connected to a handheld tablet, and a data communication connection is established between the collection host and the handheld tablet, and it is a two-way communication connection. The handheld tablet adopts a WINDOWS tablet to manage and control the entire system. The test software running on it is used to present a human-computer dialogue interface, test process control, and data analysis. The handheld tablet is provided with a LAN interface and a USB interface.

[0028] The input end of the acquisition host is connected to an analog signal transmission cable, and the two ends of the analog signal transmission cable are respectively connected to the acquisition port of the acquisition host and the port of the device under test, so as to transmit analog signals and discrete signals between the acquisition host and the device under test.

[0029] The acquisition host includes a power supply unit 1, a cross matrix unit 2, a signal acquisition unit 3 and a communication control unit 4. The power supply unit 1 includes a DC / DC conversion circuit 12, the input end of the DC / DC conversion circuit 12 is electrically connected to a protection circuit 11, the input end of the protection circuit 11 is electrically connected to an external DC power supply, the external DC power supply voltage is 27V, the output end of the protection circuit 11 is also electrically connected to a handheld tablet for charging the handheld tablet, and the output end of the DC / DC conversion circuit 12 is electrically connected to a positive and negative voltage conversion circuit 13.

[0030] The DC / DC conversion circuit 12 can convert the circuit voltage into the voltage required by each unit, even if the power supply unit 1 can output 20V, 12V, 5V and 3.3V voltages. The positive and negative voltage conversion circuit 13 can convert the voltage output by the power supply unit 1 into a positive voltage or a negative voltage, even if the power supply unit 1 can output ±20V and ±12V voltages, and the 5V and 3.3V circuits are not connected to the positive and negative voltage conversion circuit 13, so 5V and 3.3V only output positive voltages, not negative voltages.

[0031] There are four cross matrix units 2, which are independent of each other and are used to select all signals from the detection port of each device under test, and each device under test occupies one cross matrix unit 2. The cross matrix units 2 are arranged in a hierarchical manner. Each device under test includes 100 output signals.

[0032] The cross matrix unit 2 uses a solid-state switch. The solid-state switch has a large insertion resistance, a small passing power, a voltage crossover, a semiconductor structure, a small size, a long switching life of more than 100 million times, a small switching power and a short switching time. The signal characteristic detected by this system is a tiny power, and there are high requirements on the volume, switching life and power consumption during the application process. Therefore, a solid-state switch is selected.

[0033] The cross matrix unit 2 includes a preprocessing circuit 21, which is electrically connected to the output path of the device unit under test through an analog signal transmission cable to implement a preprocessing process for the electrical signal, that is, the amplitude of the electrical signal is proportionally reduced to the input range of the cross matrix unit 2. The output end of the preprocessing circuit 21 is electrically connected to a SPDT circuit 22, wherein each SPDT circuit 22 is connected to two signal receiving paths, and the output end of the SPDT circuit 22 is electrically connected to a SP8T circuit 23, wherein each SP8T circuit 23 is connected to two SPDT circuits 22, and all SP8T circuits 23 connected to the SPDT circuits 22 are connected to a total SP8T circuit 23, and the output end of the total SP8T circuit 23 is electrically connected to the signal acquisition unit 3 to realize signal transmission.

[0034] The signal acquisition unit 3 includes a filter circuit 1 31, the input end of the filter circuit is electrically connected to the SP8T circuit 23, the output end of the filter circuit 1 31 is electrically connected to a conditioning circuit 32, the conditioning circuit 32 is used to adjust the amplitude of the signal, the output end of the conditioning circuit 32 is electrically connected to a filter circuit 2 33, and the output end of the filter circuit 2 33 is electrically connected to an analog-to-digital conversion circuit 34.

[0035] The conditioning circuit 32 uses a gain instrumentation amplifier so that the conditioning circuit 32 can complete the automatic gain change according to the amplitude of the input signal to ensure that the signal can completely enter the quantization range of the analog-to-digital conversion circuit 34. Filters are installed in both the filter circuit 1 31 and the filter circuit 2 33 so that the filter circuit 1 31 and the filter circuit 2 33 can filter out the high-frequency interference signal introduced during the signal transmission process to avoid misjudgment caused by the interference signal. The analog-to-digital conversion circuit 34 is an ADC analog-to-digital converter, and the quantization depth of the analog-to-digital conversion circuit 34 is not less than 8 bits, and the sampling frequency is not less than 24KHZ.

[0036] The communication control unit 4 includes a microprocessor circuit and a communication circuit. The microprocessor circuit is electrically connected to the analog-to-digital conversion circuit 34 so that the analog-to-digital conversion circuit 34 transmits the signal to the microprocessor circuit, and the microprocessor circuit amplifies the signal in proportion. The amplification ratio corresponds to the reduction ratio of the preprocessing circuit 21, so that the signal is restored to the input amplitude.

[0037] The control end of the microprocessor circuit is also electrically connected to the control end of the cross matrix, the conditioning circuit 32 and the analog-to-digital conversion circuit 34, so as to configure the path of the cross matrix unit 2, and at the same time control the conditioning circuit 32 and the analog-to-digital conversion circuit 34 in the signal acquisition unit 3, control the conversion result of the analog-to-digital conversion circuit 34, and form a communication frame according to the communication protocol.

[0038] The output end of the microprocessor circuit is also electrically connected to the communication circuit. The output end of the communication circuit establishes a data connection with the handheld tablet via Ethernet communication for data transmission. The communication frame composed of the microprocessor circuit can be transmitted to the handheld tablet via the communication circuit, thereby satisfying data transmission.

[0039] The microprocessor circuit is combined with embedded software. Since it uses Ethernet communication to establish communication with the handheld tablet, it can meet the data transmission rate requirements. Therefore, the physical layer protocol of the communication in the embedded software will meet the standard protocol of Ethernet. At the same time, only the protocol frame structure for communicating with the host computer according to the sampling data of each channel is loaded in the payload of this standard protocol.

[0040] The redundant homonymous signal test process includes the following steps:

[0041] S1: Open the test software in the test handheld tablet;

[0042] S2: Select the redundant same-name signal test interface in the test software interface;

[0043] S3: Select the signal number with the same name that needs to be observed in this interface;

[0044] S4: Select whether to enable automatic judgment. If automatic judgment is selected, set the deviation threshold;

[0045] S5: Click the start test button to conduct the test;

[0046] S6: observe and draw the test curve to determine whether the deviation is reasonable or give a determination result based on automatic determination;

[0047] S7: Click the stop button in the interface to stop the test.

[0048] The non-redundancy signal test process includes the following steps:

[0049] S1: Open the test software in the test handheld tablet;

[0050] S2: Select the non-redundancy signal test interface in the test software interface;

[0051] S3: Select the number of the redundancy-free signal to be observed in this interface;

[0052] S4: Select whether to enable automatic judgment. If automatic judgment is selected, set the deviation threshold;

[0053] S5: Click the start test button to conduct the test;

[0054] S6: observe and draw the test curve to determine whether the deviation is reasonable or give a determination result based on automatic determination;

[0055] S7: Click the stop button in the interface to stop the test.

[0056] The discrete signal testing process includes the following steps:

[0057] S1: Open the test software in the test handheld tablet;

[0058] S2: Select the discrete signal test interface in the test software interface;

[0059] S3: Select the discrete signal number to be observed in this interface;

[0060] S4: Set discrete signal amplitude deviation threshold;

[0061] S5: Click the start test button to conduct the test;

[0062] S6: Observe the discrete signal test result interface, green means the channel is connected, red means the channel is disconnected;

[0063] S7: Click the stop button in the interface to stop the test.

[0064] In summary, the utility model can realize the simultaneous acquisition of signals in multiple detection ports through the cooperation of the cross matrix unit 2, the signal acquisition unit 3 and the communication control unit 4, thereby making the detection process more convenient and efficient, and further realizing the prejudgment of faults. By setting the conditioning circuit 32, the automatic gain change of the input signal can be realized, ensuring that the signal can enter the analog-to-digital conversion circuit 34 completely. At the same time, through the action of the filter circuit 1 31 and the filter circuit 2 33, the high-frequency interference signal introduced in the signal transmission process can be filtered out to avoid misjudgment caused by the interference signal.

[0065] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0066] In the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0067] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0068] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0069] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A telex data acquisition system, characterized in that: The acquisition host includes a collection host, the output end of which is connected to a handheld tablet, a data communication connection is established between the collection host and the handheld tablet, and the input end of the collection host is connected to an analog signal transmission cable; the collection host includes: A power supply unit (1), used to supply power to the system; A cross matrix unit (2), whose input end is connected to the analog signal transmission cable, is used to select all signals from the detection port of each detected device unit; A signal acquisition unit (3) which establishes a data communication connection with the cross matrix unit (2) so as to condition and acquire and quantify the signal selected by the cross matrix unit (2); A communication control unit (4) establishes a data communication connection with the signal acquisition unit (3) for obtaining the conversion results in the signal acquisition unit (3); a control end of the communication control unit (4) is connected to the signal acquisition unit (3) and the cross matrix unit (2) for configuring the path of the cross matrix unit (2) and controlling the signal acquisition unit (3); an output end of the communication control unit (4) is connected to the handheld tablet via Ethernet communication for data transmission.

2. The telex data acquisition system according to claim 1, characterized in that: The power supply unit (1) comprises a DC / DC conversion circuit (12) for converting voltage into the voltage required by each unit, and also comprises a positive-negative voltage conversion circuit.

3. The telex data acquisition system according to claim 1, characterized in that: Four cross matrix units (2) are provided, and the four cross matrix units (2) are independent of each other; the cross matrix units (2) are arranged in a hierarchical manner.

4. The telex data acquisition system according to claim 3, characterized in that: The cross matrix unit (2) comprises a preprocessing circuit (21), the output end of the preprocessing circuit (21) is connected to a SPDT circuit (22), the output end of the SPDT circuit (22) is connected to a SP8T circuit (23), and the output end of the SP8T circuit (23) is connected to the signal acquisition unit (3).

5. The telex data acquisition system according to claim 4, characterized in that: The signal acquisition unit (3) comprises a filter circuit 1 (31), the input end of the filter circuit 1 (31) is connected to the SP8T circuit (23), the output end of the filter circuit 1 (31) is connected to a conditioning circuit (32), the conditioning circuit (32) is used to adjust the signal amplitude, the output end of the conditioning circuit (32) is connected to a filter circuit 2 (33), and the output end of the filter circuit 2 (33) is connected to an analog-to-digital conversion circuit (34).

6. The telex data acquisition system according to claim 5, characterized in that: The communication control unit (4) comprises a microprocessor circuit and a communication circuit. The microprocessor circuit is connected to the analog-to-digital conversion circuit (34) for obtaining control information. The control end of the microprocessor circuit is connected to the cross matrix unit (2), the conditioning circuit (32) and the control end of the analog-to-digital conversion circuit (34) for controlling them. The output end of the communication circuit is connected to the handheld tablet via Ethernet communication for data transmission.

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