A comprehensive test device for a hovering watch

Abstract

The present invention discloses a comprehensive test device for hover watches, which relates to the field of hover watch testing. The comprehensive test device for hover watches includes a housing and an electrical module integrated within the housing. The electrical module includes a working voltage supply circuit and a signal source connected in parallel. The working voltage supply circuit is sequentially connected in series with a hover watch selection control circuit and an alarm detection circuit. The signal source is sequentially connected in series with a positive and negative signal selection control circuit, a signal voltage adjustment circuit, and a three-axis speed selection control circuit. The hover watch selection control circuit, the alarm detection circuit, and the three-axis speed selection control circuit are connected to the same hover watch interface circuit. The working voltage supply circuit and the signal voltage adjustment circuit are connected to the same signal voltage measurement circuit. This test device realizes the performance testing of single hover watches of four models, and solves the deficiencies of complex connection lines, inconvenient operation, and certain potential safety hazards during the testing of hover watches.

Description

Technical Field

[0001] The present invention relates to the field of hover meter testing, and particularly to a comprehensive test device for hover meters. Background Art

[0002] A hover meter consists of a meter head and a control circuit, etc., and is used in combination with a Doppler radar to sample and process the DC voltage signal proportional to the three-axis velocity of a helicopter input from the Doppler radar. When the helicopter enters the hover state, exits the hover state, or is in the hover state, the longitudinal velocity, lateral velocity, and vertical velocity in the helicopter coordinate system are displayed on the meter head. In addition, there are two warning flags that can display the status of the system, with the memory warning flag showing the memory status and the power warning flag showing the power failure status.

[0003] Currently, there are four types of hover meters installed on helicopters, namely HI hover meters, ZXT-1 hover meters, 777 hover meters, and XTB-1 hover meters. When carrying out major overhauls of helicopters, it is necessary to repair and test the tactical performance parameters of the hover meters. There are only simple test cables for some types of hover meters in the in-field, and it is impossible to repair and test the performance of all four types of hover meters.

[0004] The four types of hover meters in the prior art are all in the form of independent components and are electrically connected to the external system through a fixed connector. The structural principles of the four types of hover meters are roughly similar, and the interface characteristics are slightly different. The simple test cables used before were self-made by the factory around 2000 and could only test individual types of hover meters, and it was impossible to detect all four existing types of hover meters. On the other hand, when using the test cables, one end of each cable needs to be connected to the corresponding pin of the hover meter connector, and the other end needs to be connected to the power supply or signal source, which is very inconvenient to operate.

[0005] It is evaluated that although the original test equipment and process methods do not affect the repair, testing, and delivery of products, they are prone to incorrect wiring, have a relatively high quality and safety risk, and have low work efficiency. Summary of the Invention

[0006] The object of the present invention is to address the above deficiencies and propose a comprehensive test device for hover meters that can achieve the single-piece performance testing of four types of hover meters and solve the problems of complex connection lines and inconvenient operation during hover meter testing.

[0007] The present invention specifically adopts the following technical solutions:

[0008] A hover meter comprehensive test device includes a housing and an electrical module integrated within the housing. The electrical module includes a working voltage supply circuit and a signal source connected in parallel. The working voltage supply circuit sequentially connects in series a hover meter selection control circuit and an alarm detection circuit. The signal source sequentially connects in series a positive and negative signal selection control circuit, a signal voltage adjustment circuit, and a three-axis speed selection control circuit. The hover meter selection control circuit, the alarm detection circuit, and the three-axis speed selection control circuit are connected to the same hover meter interface circuit. The working voltage supply circuit and the signal voltage adjustment circuit are connected to the same signal voltage measurement circuit.

[0009] Preferably, a cable socket is provided on the front panel of the housing, and the hover meter interface corresponds to the cable socket.

[0010] Preferably, a DC voltage display unit, a +28V jack, a +4V jack, a power ground jack, a ±5V jack, and a signal ground jack are also provided on the front panel of the housing.

[0011] Preferably, a positive and negative voltage signal selection switch, an adjustable voltage signal channel selection button, a lateral speed button, a longitudinal speed button, a vertical speed button, and a hover meter selection button are also provided on the front panel of the housing.

[0012] Preferably, when the switch K1 is turned on, the AC 220V power supply supplies power to the digital voltmeter and the DC power supply module respectively. The DC power supply U1 outputs 28V and +3V DC voltages to supply power to the hover meter and the memory alarm detection circuit. U2 outputs to supply power to the ±6V signal voltage conversion circuit, and outputs ±6V signal voltages to simulate three-axis speed signals. At the same time, the ±6V signal voltages are applied to the digital voltmeter to indicate and display the speed signal voltage value.

[0013] Preferably, the DC power supply U2 outputs 28V DC voltage to supply power to the ±6V signal voltage conversion circuit, and outputs ±6V signal voltages to simulate three-axis speed signals. The magnitude of the speed signal can be changed by adjusting the knob and applied to the longitudinal, lateral, and vertical channels of the hover meter respectively. Whether the hover meter works normally can be judged by the indicated value of the display circuit on the device and observing the operation of the hover meter.

[0014] Preferably, during the inspection of the longitudinal speed, turn the "K1 AC Power" switch on the front panel of the housing to the on position, the "K2 Positive / Negative Signal Selection" switch to the negative signal position, the "K3 Channel Selection" switch to the adjustable voltage signal position, the "K4 Power Alarm" switch to the off position, the "K5 Memory Alarm" switch to the off position, the "K6 Hover Meter Selection" knob to the "hover meter model to be tested" position, the "K7 Lateral Speed" switch to the off position, the "K8 Longitudinal Speed" switch to the on position, and the "K9 Vertical Speed" switch to the off position; adjust the output of the adjustable signal voltage, observe that the hover meter should indicate the corresponding reading, select the positive and negative voltage signals to be output respectively through the "K2 Positive / Negative Signal Selection" switch, and turn the "K8 Longitudinal Speed" switch to the off position.

[0015] Preferably, during the inspection of the lateral speed, turn the "K1 AC Power" switch on the front panel of the housing to the on position, the "K2 Positive / Negative Signal Selection" switch to the negative signal position, the "K3 Channel Selection" switch to the adjustable voltage signal position, the "K4 Power Alarm" switch to the off position, the "K5 Memory Alarm" switch to the off position, the "K6 Hover Meter Selection" knob to the "hover meter model to be tested" position, the "K7 Lateral Speed" switch to the on position, the "K8 Longitudinal Speed" switch to the off position, and the "K9 Vertical Speed" switch to the off position; adjust the output of the adjustable signal voltage, observe that the hover meter should indicate the corresponding reading, select the positive and negative voltage signals to be output respectively through the "K2 Positive / Negative Signal Selection" switch, and turn the "K7 Lateral Speed" switch to the off position.

[0016] Preferably, during the inspection of the vertical speed, turn the "K1 AC Power" switch on the front panel of the housing to the on position, the "K2 Positive / Negative Signal Selection" switch to the negative signal position, the "K3 Channel Selection" switch to the adjustable voltage signal position, the K4 Power Alarm switch to the off position, the "K5 Memory Alarm" switch to the off position, the "K6 Hover Meter Selection" knob to the hover meter model to be tested position, the "K7 Lateral Speed" switch to the off position, the "K8 Longitudinal Speed" switch to the off position, and the "K9 Vertical Speed" switch to the on position; adjust the output of the adjustable signal voltage, observe that the hover meter should indicate the corresponding reading, select the positive and negative voltage signals to be output respectively through the "K2 Positive / Negative Signal Selection" switch, and turn the "K9 Vertical Speed" switch to the off position.

[0017] The present invention has the following beneficial effects:

[0018] The test device realizes the performance test of hover gauges of four models, solves the problems of complex connection lines, inconvenient operation and certain potential safety hazards during the test of hover gauges. During subsequent repairs, the hover gauges delivered by this comprehensive test device are interchangeable with the same-type hover gauges repaired by other units. Description of the Drawings

[0019] Figure 1 It is the electrical principle block diagram of the comprehensive test device for hover gauges;

[0020] Figure 2 It is the electrical schematic diagram of the comprehensive test device for hover gauges;

[0021] Figure 3 It is the front panel diagram of the comprehensive test device for hover gauges;

[0022] Figure 4 It is the equipment connection diagram during the test process. Detailed Implementation Manner

[0023] The following further describes the detailed implementation manner of the present invention in conjunction with the drawings and specific embodiments:

[0024] Combined with Figures 1-4 , a comprehensive test device for hover gauges includes a housing and an electrical module integrated in the housing. The electrical module includes a working voltage supply circuit and a signal source connected in parallel. The working voltage supply circuit is successively connected in series with a hover gauge selection control circuit and an alarm detection circuit. The signal source is successively connected in series with a positive and negative signal selection control circuit, a signal voltage adjustment circuit and a three-axis speed selection control circuit. The hover gauge selection control circuit, the alarm detection circuit and the three-axis speed selection control circuit are connected to the same hover gauge interface circuit. The working voltage supply circuit and the signal voltage adjustment circuit are connected to the same signal voltage measurement circuit.

[0025] A cable socket is provided on the front panel of the housing, and the hover gauge interface corresponds to the cable socket. A DC voltage display unit, a +28V jack, a +4V jack, a power ground jack, a ±5V jack and a signal ground jack are also provided on the front panel of the housing. A positive and negative voltage signal selection switch, an adjustable voltage signal channel selection button, a lateral speed button, a longitudinal speed button, a vertical speed button and a hover gauge selection button are also provided on the front panel of the housing.

[0026] When the switch K1 is turned on, the AC 220V power supply supplies power to the digital voltmeter and the DC power supply module respectively; the DC power supply U1 outputs 28V and +3V DC voltages to supply power to the hover gauge and the memory alarm detection circuit, and U2 outputs to supply power to the ±6V signal voltage conversion circuit, outputs ±6V signal voltage to simulate the three-axis speed signal, and at the same time the ±6V signal voltage is applied to the digital voltmeter to indicate and display the speed signal voltage value.

[0027] The DC power supply U2 outputs a DC voltage of 28V to supply power to the ±6V signal voltage conversion circuit. The output ±6V signal voltage is used to simulate the triaxial velocity signal. The magnitude of the velocity signal can be changed by adjusting the knob and is applied to the longitudinal, lateral, and vertical channels of the hover meter respectively. Whether the hover meter is working properly can be judged by the indicated value of the display circuit on the device and by observing the operation of the hover meter.

[0028] During the preparation before the test:

[0029] Place the 777 hover meter horizontally on the test bench desktop so that the horizontal scale of the hover meter dial is parallel to the tester's eyes; as shown in Figure 3 , connect the cable of the "XS1" socket on the front panel of the hover meter comprehensive test device to the 32-pin plug of the hover meter, and connect the power cable on the rear panel of the test device to the "220V 50Hz" power supply.

[0030] Turn the "K1 AC power supply" switch on the front panel of the test device to the off position, the K2 positive and negative signal selection switch to the negative signal position, the "K3 channel selection" switch to the adjustable voltage signal position, the "K4 power alarm" switch to the off position, the "K5 memory alarm" switch to the off position, the "K6 hover meter selection" knob to the position of the hover meter model to be tested, the "K7 lateral speed" switch to the off position, the "K8 longitudinal speed" switch to the off position, and the "K9 vertical speed" switch to the off position.

[0031] During the inspection of the longitudinal speed:

[0032] Turn the "K1 AC power supply" switch on the front panel of the housing to the on position, the "K2 positive and negative signal selection" switch to the negative signal position, the "K3 channel selection" switch to the adjustable voltage signal position, the "K4 power alarm" switch to the off position, the "K5 memory alarm" switch to the off position, the "K6 hover meter selection" knob to the "hover meter model to be tested" position, the "K7 lateral speed" switch to the off position, the "K8 longitudinal speed" switch to the on position, and the "K9 vertical speed" switch to the off position; adjust the output of the adjustable signal voltage and observe that the hover meter should indicate the corresponding readings. Select the positive and negative voltage signals respectively through the "K2 positive and negative signal selection" switch, and turn the "K8 longitudinal speed" switch to the off position.

[0033] During the inspection of the lateral speed:

[0034] Turn the "K1 AC Power" switch on the front panel of the enclosure to the ON position, the "K2 Positive / Negative Signal Selection" switch to the negative signal position, the "K3 Channel Selection" switch to the adjustable voltage signal position, the "K4 Power Alarm" switch to the OFF position, the "K5 Memory Alarm" switch to the OFF position, the "K6 Hover Meter Selection" knob to the position of the "hover meter model being tested", the "K7 Lateral Speed" switch to the ON position, the "K8 Longitudinal Speed" switch to the OFF position, the "K9 Vertical Speed" switch to the OFF position. Adjust the output of the adjustable signal voltage and observe that the hover meter should indicate the corresponding readings. Positive and negative voltage signals can be selected for output respectively through the "K2 Positive / Negative Signal Selection" switch. Then turn the "K7 Lateral Speed" switch to the OFF position.

[0035] During the inspection of the vertical speed:

[0036] Turn the "K1 AC Power" switch on the front panel of the enclosure to the ON position, the "K2 Positive / Negative Signal Selection" switch to the negative signal position, the "K3 Channel Selection" switch to the adjustable voltage signal position, the K4 Power Alarm switch to the OFF position, the "K5 Memory Alarm" switch to the OFF position, the "K6 Hover Meter Selection" knob to the position of the hover meter model being tested, the "K7 Lateral Speed" switch to the OFF position, the "K8 Longitudinal Speed" switch to the OFF position, the "K9 Vertical Speed" switch to the ON position. Adjust the output of the adjustable signal voltage and observe that the hover meter should indicate the corresponding readings. Positive and negative voltage signals can be selected for output respectively through the "K2 Positive / Negative Signal Selection" switch. Then turn the "K9 Vertical Speed" switch to the OFF position.

[0037] During the inspection of the power alarm:

[0038] Turn the "K1 AC Power" switch on the front panel of the enclosure to the ON position, the "K6 Hover Meter Selection" knob to the position of the "hover meter model being tested", supply power to the hover meter for operation by the test device, turn the "K4 Power Alarm" switch to the ON position, and the power alarm indicator light of the hover meter should light up.

[0039] During the inspection of the memory alarm:

[0040] Turn the "K1 AC Power" switch on the front panel of the enclosure to the ON position, the "K6 Hover Meter Selection" knob to the position of the hover meter model being tested, supply power to the hover meter for operation by the test device, turn the "K5 Memory Alarm" switch to the ON position, and the memory alarm indicator light of the hover meter should light up (the memory indicator "M" of the XTB-1 hover meter should go out).

[0041] Certainly, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions, or substitutions made by those skilled in the art within the scope of the essence of the present invention should also fall within the protection scope of the present invention.

Claims

1. A hover meter comprehensive test device, which is used in conjunction with a Doppler radar. It samples and processes the DC voltage signals proportional to the helicopter's three-axis speeds input from the Doppler radar. When the helicopter enters the hover state, exits the hover state, or is in the hover state, the longitudinal speed, lateral speed, and vertical speed in the helicopter coordinate system are displayed on the meter head. It includes a housing and an electrical module integrated within the housing. It is characterized in that the electrical module includes a working voltage supply circuit and a signal source connected in parallel. The working voltage supply circuit is successively connected in series with a hover meter selection control circuit and an alarm detection circuit. The signal source is successively connected in series with a positive and negative signal selection control circuit, a signal voltage adjustment circuit, and a three-axis speed selection control circuit. The hover meter selection control circuit, the alarm detection circuit, and the three-axis speed selection control circuit are connected to the same hover meter interface circuit. The working voltage supply circuit and the signal voltage adjustment circuit are connected to the same signal voltage measurement circuit; a cable socket is provided on the front panel of the housing, and the hover meter interface corresponds to the cable socket; a DC voltage display unit, a +28V jack, a +4V jack, a power ground jack, ±5V jacks, and a signal ground jack are also provided on the front panel of the housing; a positive and negative voltage signal selection switch, an adjustable voltage signal channel selection button, a lateral speed button, a longitudinal speed button, a vertical speed button, and a hover meter selection button are also provided on the front panel of the housing; When the switch K1 is turned on, the AC 220V power supply supplies power to the digital voltmeter and the DC power supply module respectively; the DC power supply U1 outputs 28V and +3V DC voltages to supply power to the hover meter and the memory alarm detection circuit. The DC power supply U2 outputs 28V DC voltage to supply power to the ±6V signal voltage conversion circuit. The ±6V signal voltage is used to simulate the three-axis speed signals. At the same time, the ±6V signal voltage is applied to the digital voltmeter to display the speed signal voltage value; by adjusting the knob, the magnitude of the speed signal can be changed and applied to the longitudinal, lateral, and vertical channels of the hover meter respectively. Whether the hover meter works normally can be judged by the indicated value of the display circuit on the device and observing the operation of the hover meter.

2. A hover meter comprehensive test device as described in claim 1, it is characterized in that during the inspection process of the longitudinal speed, place the "K1 AC power supply" switch on the front panel of the housing in the on position, the "K2 positive and negative signal selection" switch in the negative signal position, the "K3 channel selection" switch in the adjustable voltage signal position, the "K4 power alarm" switch in the off position, the "K5 memory alarm" switch in the off position, the "K6 hover meter selection" knob in the "hover meter model to be tested" position, the "K7 lateral speed" switch in the off position, the "K8 longitudinal speed" switch in the on position, and the "K9 vertical speed" switch in the off position; adjust the output of the adjustable signal voltage, observe that the hover meter should indicate the corresponding reading, select the output positive and negative voltage signals respectively through the "K2 positive and negative signal selection" switch, and place the "K8 longitudinal speed" switch in the off position.

3. A hover meter comprehensive test device as described in claim 1, it is characterized in that during the inspection process of the lateral speed, Turn the "K1 AC Power" switch on the front panel of the enclosure to the ON position, the "K2 Positive / Negative Signal Selection" switch to the negative signal position, the "K3 Channel Selection" switch to the adjustable voltage signal position, the "K4 Power Alarm" switch to the OFF position, the "K5 Memory Alarm" switch to the OFF position, the "K6 Hover Meter Selection" knob to the "hover meter model to be tested" position, the "K7 Lateral Speed" switch to the ON position, the "K8 Longitudinal Speed" switch to the OFF position, the "K9 Vertical Speed" switch to the OFF position. Adjust the output of the adjustable signal voltage and observe that the hover meter should indicate the corresponding readings. Positive and negative voltage signals can be selected for output respectively through the "K2 Positive / Negative Signal Selection" switch. Then turn the "K7 Lateral Speed" switch to the OFF position.

4. A hover meter comprehensive test device as described in claim 1, characterized in that, During the inspection of the vertical speed, turn the "K1 AC Power" switch on the front panel of the enclosure to the ON position, the "K2 Positive / Negative Signal Selection" switch to the negative signal position, the "K3 Channel Selection" switch to the adjustable voltage signal position, the K4 Power Alarm switch to the OFF position, the "K5 Memory Alarm" switch to the OFF position, the "K6 Hover Meter Selection" knob to the hover meter model to be tested position, the "K7 Lateral Speed" switch to the OFF position, the "K8 Longitudinal Speed" switch to the OFF position, the "K9 Vertical Speed" switch to the ON position. Adjust the output of the adjustable signal voltage and observe that the hover meter should indicate the corresponding readings. Positive and negative voltage signals can be selected for output respectively through the "K2 Positive / Negative Signal Selection" switch. Then turn the "K9 Vertical Speed" switch to the OFF position.

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