A throttle switch package assembly test device

Abstract

The present invention discloses a throttle switch package testing device, which includes a contact group unit corresponding to a single throttle switch package, a status indication unit, and a power supply circuit unit for providing a test power supply; the contact group unit includes contact pairs respectively arranged corresponding to each switch in a single throttle switch package, and each contact pair respectively includes a normally closed contact and a normally open contact for connecting a single switch; all the contact pairs in a single contact group unit are interlocked with each other; the status indication unit includes a resistance measurement module and an indication module, the resistance measurement module is connected to one end of each contact in the contact group unit to measure the contact resistance of the switch contact connected when the contact is conducting, and outputs a status signal of the switch conduction state and / or the contact resistance value of the switch contact through the indication module. The test circuit of the present invention is simple, and it is convenient to use an interlocked key switch to comprehensively test a single throttle switch package component of an aircraft. The test process is simple and easy to operate, which can effectively improve the test efficiency and reduce the test cost.

Description

Technical Field

[0001] The present invention relates to the technical field of testing throttle switch pack assemblies, especially the technical field of testing throttle switch packs as aircraft accessories, and provides a testing device for throttle switch pack assemblies. Background Art

[0002] The aircraft throttle switch pack assembly is an important component for aircraft brakes and reverse thrust. It is divided into two throttle switch packs, left and right, each having nine switches (S1 - S9), which are led out by two cables. Each switch is a set of normally closed and normally open contacts, corresponding to the control systems of the brakes and reverse thrust. After replacing the throttle switch pack assembly, it is necessary to conduct functional tests on a total of 18 pairs of contacts in two groups of the throttle switch pack assembly for calibration and adjustment.

[0003] In actual inspection work, the inspection operation of the throttle switch pack assembly needs to achieve functions such as selection of switches (S1 - S9), indication of contact on - off, alarm for over - limit of on - resistance value, and measurement of on - resistance value. The inspection operation of the throttle pack needs to be carried out in the cockpit. However, the cockpit space is narrow and it is not convenient to obtain the power supply required for inspection. Therefore, the inspection instrument should have the characteristics of small volume, light weight, and convenient power acquisition. At present, there is no dedicated inspection device in domestic civil aviation aircraft that can meet such requirements for the inspection of throttle switch pack assemblies. Instead, the method of manual multimeter measurement is mostly used. This inspection method requires multiple people to cooperate, is time - consuming and laborious, and is prone to errors.

[0004] In addition to the manual multimeter measurement method, there are the following two implementation forms for throttle pack inspection:

[0005] 1. Using a simple switch circuit to display 36 contacts of two groups of switches simultaneously on the panel at one time. This method is relatively simple, but there are too many operation buttons and displayed signals on the panel, which is not convenient for inspectors to observe;

[0006] 2. Using an electronic logic circuit for switch selection and inspection, such as using a programmable controller or microprocessor (PLC, MCU). The implementation of this inspection method is more complex, has a higher cost, and also consumes more power. Summary of the Invention

[0007] The purpose of the present invention is to provide a testing device for throttle switch packs, which can comprehensively test the aircraft throttle switch pack assembly with a simple circuit. The testing process is simple and easy to operate, which can effectively improve the testing efficiency and reduce the testing cost.

[0008] The technical solution adopted by the present invention is: a testing device for throttle switch packs, including a contact group unit, a power supply circuit unit, and a status indication unit corresponding to a single throttle switch pack; the power supply circuit unit provides a test power supply;

[0009] The contact group unit includes contact pairs respectively set for each switch in a single throttle switch package. Each contact pair includes a normally closed contact and a normally open contact respectively used for connecting the normally closed and normally open contacts of a single switch. All the contact pairs in a single contact group unit are interlocked with each other. The first ends of each contact are connected to the status indication unit, and the second ends are the switch contact connection ends.

[0010] The status indication unit includes a resistance measurement module and an indication module. The resistance measurement module is connected to the first ends of each contact in the contact group unit to measure the contact resistance of the switch contact connected when the contact is conducting, and outputs a switch conduction status and / or a status signal of the contact resistance value of the switch contact through the indication module.

[0011] The above-mentioned interlock means that after the normally open contact of one of the contact pairs is selected and switched to closed, the normally closed contacts of the other contact pairs are in the closed state.

[0012] Optionally, the resistance measurement module includes a first resistor meter and a second resistor meter with an alarm function. The first resistor meter is connected with a first resistance value status indicator light and a second resistance value status indicator light corresponding to different resistance value alarm thresholds. The second resistor meter is connected with a third resistance value status indicator light and a fourth resistance value status indicator light corresponding to different resistance value alarm thresholds. The first resistance value status indicator light, the second resistance value status indicator light, the third resistance value status indicator light and the fourth resistance value status indicator light form the indication module.

[0013] In a single contact group unit, the first ends of all the normally closed contacts are connected in parallel and connected to the resistance signal detection end of the first resistor meter. The second ends of all the normally open contacts are connected in parallel and connected to the resistance signal detection end of the second resistor meter.

[0014] In the above solution, the resistor meter with an alarm function can adopt existing products. The resistance value corresponding to the lighting of its resistance value status indicator light is the set resistance value alarm threshold. Therefore, when the present invention is applied, when any contact in the contact group is connected and conducts the corresponding switch contact, the connected resistor meter can measure the contact resistance value of the contact and control the corresponding indicator light to light up according to the resistance value detection result.

[0015] Optionally, the resistance value alarm threshold condition for the first resistor meter to control the first resistance value status indicator light to light up is: the resistance value measurement result is less than or equal to the maximum normal contact resistance value of the switch normally closed contact.

[0016] The resistance value alarm threshold condition for the first resistor meter to control the second resistance value status indicator light to light up is: the resistance value measurement result is greater than the maximum normal contact resistance value of the switch normally closed contact.

[0017] The resistance value alarm threshold condition for the second resistor meter to control the third resistance value status indicator light to light up is: the resistance value measurement result is less than or equal to the maximum normal contact resistance value of each switch normally open contact.

[0018] The resistance alarm threshold condition for the second resistor meter to control the fourth resistance state indicator light to turn on is that the measured resistance result is greater than the maximum normal contact resistance of each normally open contact of the switch.

[0019] The above solution can achieve: after power-on, before the normally open contact conducts the normally open contact of the switch, the first resistance state indicator light turns on. If there is an over-limit resistance, the second resistance state indicator light turns on; when any normally open contact conducts the normally open contact of the switch, the third resistance state indicator light turns on. If the contact resistance of the normally open contact of the switch in the conducting state is over-limit, the fourth resistance state indicator light turns on. Thus, the visualization of the test process state can be realized, which greatly facilitates the observation and operation of the test personnel.

[0020] In order to further simplify the circuit, the second resistance state indicator light and the fourth resistance state indicator light of the present invention share the same over-limit resistance alarm indicator light;

[0021] The first resistor meter and the second resistor meter respectively include a first alarm output port corresponding to a normal resistance value and a second alarm output port corresponding to an over-limit resistance value;

[0022] The first alarm output ports of the first resistor meter and the second resistor meter are respectively connected to the first resistance state indicator light and the third resistance state indicator light; the second alarm output ports of the first resistor and the second resistor meter are connected in parallel and then connected to the over-limit resistance alarm indicator light;

[0023] The first resistance state indicator light, the third resistance state indicator light, and the over-limit resistance alarm indicator light adopt indicator lights of different colors.

[0024] In addition, the resistance measurement module of the present invention can also adopt the combination of an existing resistance measurement circuit and a microprocessor MCU. The indication module is provided with 3 indicator lights, which respectively represent the conduction of the normally closed contact, the conduction of the normally open contact of the switch, and the over-limit contact resistance of the normally open contact corresponding to the switch, and are controlled by the MCU to turn on or off. The resistance measurement circuit is used to measure the contact resistance when the normally closed contacts are in parallel and when the normally open contacts are in parallel and conduct, and transmit it to different ports of the MCU - two ports respectively set for the corresponding normally open contacts and normally closed contacts. The resistance alarm threshold condition is preset in the MCU. During operation, the MCU controls the turning on and off of the 3 indicator lights according to the received resistance detection result, so as to realize the conduction state indication and the over-limit contact resistance alarm output.

[0025] Optionally, the power supply circuit unit includes a DC power supply and a test control contact connected in series in the DC power supply loop; the test control contact is a normally closed contact and is interlocked with each contact in the contact group unit.

[0026] Optionally, there are two sets of the contact group unit, the power supply circuit unit and the status indication unit, which respectively correspond to the left and right throttle switch packages of the aircraft.

[0027] In the power supply circuit unit corresponding to the left / right throttle switch package, a second test control contact is also connected in series in the DC power supply loop. The second test control contact is a normally open contact and is interlocked with each contact in the contact group unit corresponding to the right / left throttle switch package.

[0028] Optionally, a test status indicator light is also connected in series in each DC power supply loop. For any DC power supply loop, when the first test control contact and the second test control contact are both conducting, the test status indicator light lights up. Due to the interlock mechanism design of the test control contact and the contacts in the two contact groups in the foregoing solution, the present invention can realize that only one of the left or right throttle switch packages can be tested for the switch at any time, which can ensure the orderly progress of the test.

[0029] Optionally, a single contact group unit includes 9 groups of contacts, and a ten-position interlock piano key switch is used to implement it with the test control contact. A single throttle switch package of the aircraft includes 9 switches. The 9 groups of contacts of the contact group unit are respectively connected to the 9 switches in an electrically connected manner. The normally open contacts and normally closed contacts in each group of contacts are respectively connected to the normally open contacts and normally closed contacts of a single switch. Thus, only 2 ten-position interlock piano key switches can be used to realize the test of all switches of the two throttle switch packages of the aircraft.

[0030] Optionally, in a single contact group unit, the contacts of all contact pairs are electrically connected to the corresponding switches in the throttle switch package through two aviation plug connectors. Since the throttle switch package is connected to the aircraft controller through an aviation plug connector, the present invention uses an aviation plug connector to simplify the connection between the test device and the throttle switch package. The contacts connected by the two aviation plugs can be set according to the switch contact distribution of the two aviation plugs of the throttle switch package.

[0031] Optionally, the throttle switch package test device further includes a housing for installing the contact group unit, the power supply circuit unit and the status indication unit;

[0032] An external connection end is provided on the line connecting the first ends of the normally open contacts and normally closed contacts in the contact group unit to the resistance measurement module; a socket is provided on the housing corresponding to the external connection end.

[0033] A battery mounting seat is also provided in the housing, and the power output connection end of the battery mounting seat is connected to the DC power supply loop. That is, the DC power supply in the power supply circuit unit of the present invention can be sourced from a replaceable battery. Of course, it can also be set as an existing rechargeable power module.

[0034] The above socket can facilitate the connection to the measurement terminal of a multimeter for directly measuring the contact resistance of the energized switch, or for connecting an adjustable resistor externally to verify the resistance alarm threshold of the resistance measurement module in the status indication unit.

[0035] Beneficial effects

[0036] The circuit design of the throttle switch package test device of the present invention can realize the selection and testing of each switch in each throttle switch package, and can detect and alarm the contact resistance of the switch contacts. The principle is simple, the functions are comprehensive, it is convenient for the operator, and the test efficiency can be greatly improved.

[0037] At the same time, the present invention can set an overall test device for the left and right throttle switch packages of the aircraft, and can realize the selection and testing of any one throttle switch package by using two groups of key-type interlocking switches. Through the design of the status display unit, the status display design on the outer panel of the test device can be simplified, making the test process information more intuitive and further facilitating the operation of the tester.

[0038] In addition, the present invention can also support the detection of the switch contact status by connecting an external resistor meter, and verify the resistance alarm threshold of the resistance measurement module in the status display unit of the test device itself by connecting an external resistor, improving the reliability of the test device. Description of the drawings

[0039] Figure 1 The figure shows a schematic diagram of the circuit principle of an embodiment of the throttle switch package test device of the present invention;

[0040] Figure 2 The figure shows a schematic diagram of the circuit principle of another embodiment of the throttle switch package test device of the present invention;

[0041] Figure 3 The figure shows a schematic diagram of the principle of an embodiment of the status indication unit in the throttle switch package test device of the present invention;

[0042] In the figure, 01 - jack, 02 - resistor meter. Specific embodiments

[0043] The technical concept of the present invention is: by setting interlocking contact pairs for the switches of a single throttle switch package and setting a unified status indication unit, it can be realized that any switch in the throttle switch package can be selected by pressing a key during the test, and the switch conduction status and resistance value status during the test process are indicated by the status indication unit, simplifying the test device circuit, making the test instrument small in size, light in weight, convenient to operate, and the test process status more intuitive.

[0044] The following is further described in conjunction with the drawings and specific embodiments.

[0045] In the aircraft cockpit, the pilot and co-pilot correspond to the left and right thrust reverser control levers respectively. The left and right control levers correspond to the left and right identical throttle switch packages. A single aircraft throttle switch package includes 9 switches, and each switch is a set of normally closed and normally open contacts. The 9 switches are connected to the aircraft control system through 2 aviation connectors.

[0046] In order to test the throttle switch package assembly, and simplify the test circuit, test instrument and test operation process, the technical solution adopted by the present invention is:

[0047] A throttle switch package test device includes a contact group unit, a power supply circuit unit and a status indication unit corresponding to a single throttle switch package; the power supply circuit unit provides a test power supply;

[0048] The contact group unit includes contact pairs respectively arranged corresponding to each switch in a single throttle switch package. Each contact pair includes a normally closed contact and a normally open contact respectively used for connecting the normally closed and normally open contacts of a single switch; all the contact pairs in a single contact group unit are interlocked. The first ends of each contact are connected to the status indication unit, and the second ends are switch contact connection ends;

[0049] The status indication unit includes a resistance measurement module and an indication module. The resistance measurement module is connected to the first ends of each contact in the contact group unit to measure the contact resistance of the switch contact connected when the contact is conducting, and outputs a switch conduction state and / or a status signal of the contact resistance value of the switch contact through the indication module.

[0050] The above technical solution can be specifically implemented in the following several or other more implementation manners.

[0051] Embodiment 1

[0052] Reference Figure 2 As shown, this embodiment can realize that a single test device can selectively test any switch of any one of the two throttle switch packages, and indicate the switch conduction state and the switch contact resistance value state during the test process.

[0053] In this embodiment, the throttle switch package test device includes test components respectively arranged corresponding to each throttle switch package. Each group of test components respectively includes a contact group unit, a power supply circuit unit and a status indication unit. For the convenience of description, the test components corresponding to the left and right throttle switch packages and the specific components they contain are distinguished by group a and group b.

[0054] The contact group units of group a and group b each include 9 contact pairs corresponding to the 9 switches in a single throttle switch package: group a S1-L~S9-L, group b S1-R~S9-R. Each contact pair includes a normally closed contact and a normally open contact respectively used to connect the normally closed and normally open contacts of a single switch; all contact pairs in a single contact group unit are interlocked, the first end of each contact is connected to the status indication unit, and the second end is the switch contact connection end.

[0055] The status indication units of group A and group B both include a resistance measuring module and an indication module. The resistance measuring module is connected to the first end of each contact in the contact group unit to measure the contact resistance of the connected switch contact when the contact is turned on, and outputs the switch conduction status and the contact resistance value status signal of the switch contact through the indication module.

[0056] In actual application, the 9 contact pairs in the contact group unit are connected to the 9 switches in the throttle switch package respectively, and any contact pair is selected to close its normally open contacts. Then the joystick is moved to make the selected contacts and the corresponding switch contacts conduct. The angle on the aircraft control system display interface when the switch is turned on is read. If it meets the manual requirements of the corresponding switch and the indication module does not prompt that the contact resistance is out of limit after the resistance measurement module measures the resistance, the switch test passes.

[0057] In this embodiment, each resistance measurement module uses two resistance meters with alarm function, and its power supply can be taken from the power supply circuit unit. The indication module can be realized by the alarm indicator light of the resistance meter, or a separate indicator light can be designed and connected to the alarm signal output port of the alarm resistance meter.

[0058] Combination Figure 1 , Figure 2 and Figure 3 , this embodiment is designed and optimized based on the existing resistance meter with alarm function, and a total of three indicator lights are used: a normal indicator light, a switch action indicator light, and a resistance over-limit alarm indicator light. Among the two resistance meters 02, one of the resistance meters is connected to the first end of all the normally closed contacts in the contact group unit in parallel, and there are two alarm output ports, which correspond to different resistance measurement values, and are respectively connected to the normal indicator light and the resistance over-limit alarm indicator light. Among them, the alarm output port corresponding to the normal resistance detection result is connected to the first resistance state indicator light, that is, the normal indicator light. The alarm output port outputs an alarm signal so that the alarm value for the normal indicator light to light up can be set to be less than or equal to the maximum parallel resistance value (such as ≤10Ω) of the normally closed contact state of the multiple normally closed contacts in the contact group when the switch is normally turned on. Here, it is called the first contact resistance value. After the power is turned on, if the resistance value measured by the resistance meter meets the first contact resistance value, the normal indicator light is on. If it does not meet the first contact resistance value (such as >10Ω), the resistance over-limit alarm indicator light is on.

[0059] The first end after all normally open contacts in another rheostat connection contact group unit are connected in parallel. There are also two alarm output ports, corresponding to different resistance measurement values respectively, and are connected to the switch operation indicator light and the resistance value overlimit alarm indicator light respectively. The resistance value alarm threshold of the rheostat can also be set in advance. Specifically: the resistance value alarm threshold condition for the rheostat to control the switch operation indicator light to turn on is that the resistance value measurement result is less than or equal to the maximum normal contact resistance value of each switch normally open contact (such as ≤10Ω), which is called the second contact resistance value here. Then after the power is turned on, when any contact pair is selected and the normally open contact closes, and the tester operates the joystick to make it conduct with the corresponding switch contact, if the contact resistance value meets the second contact resistance value, the switch operation indicator light will turn on. If the contact resistance value exceeds the limit (such as >10Ω), the resistance value overlimit alarm indicator light will turn on.

[0060] As Figure 3 shown, the alarm output port of the rheostat realizes the on-off control of the indicator light power supply circuit through the relay contact. The alarm output ports corresponding to the overlimit detection results of the resistance values of the two rheostats are connected in parallel and then connected to the resistance value overlimit alarm indicator light. Then, when the resistance value of any switch contact conducted by any contact exceeds the limit, the resistance value overlimit alarm indicator light will turn on.

[0061] Through the above design, the on-site tester can judge the selected state of the switches in the two throttle switch packages and whether the resistance value exceeds the limit after the switch conducts through the states of three indicator lights in each of the two groups. Each group of indicator lights constitutes the indicating module of a state indicating unit.

[0062] The DC power supply Vc in the a-group and b-group power supply circuit units can be uniformly set to be sourced from a group of batteries, and a battery box is correspondingly set in the test device to provide the power required during the test process, without the need to provide an external power supply, which is convenient for power taking during the test process.

[0063] In order to further optimize the control of the test process and the indication of the test status of the test device, the power supply circuit unit of this embodiment includes a DC power supply, as well as a first test control contact and a test status indicator lamp connected in series in the DC power supply circuit. The resistance measurement module that needs to draw power can be connected to the DC power supply circuit. The first test control contact is a normally closed contact. Taking group a as an example, the first test control contact S10-L in the DC power supply circuit of the test components in group a is interlocked with the contact pairs S1-L to S9-L of the contact group unit in group a. The same setting is made for group b. Taking group a as an example, when the switch corresponding to the first test control contact S10-L in the DC power supply circuit is selected, the first test control contact (normally closed contact) disconnects, the DC power supply circuit of group a is cut off, the test status indicator lamp HL-L of group a is in the extinguished state, and the normally open contacts S1-L to S9-L in the contact group unit interlocked with the first test control contact S10-L are in the normally open state, there is no conduction with the switches in the throttle switch package, the resistor cannot draw power, and group a cannot perform the test. On the contrary, when the first test control contact S10-L is normally closed, the DC power supply circuit is conducting, HL-L lights up, the resistor can draw power normally, when no contact pair in S1-L to S9-L is selected, the normal state indicator lamp lights up. If the parallel resistance value exceeds the limit due to the abnormality of the normally closed contact of the switch conducted by the normally closed contact, the resistance value exceeding the limit alarm indicator lamp lights up. When any contact pair is selected and conducts with the corresponding switch contact, and there is no resistance value exceeding the limit, the switch action indicator lamp lights up. If the resistance value exceeds the limit due to factors such as the switch contact being contaminated, rusted, or burned during conduction, the resistance value exceeding the limit alarm indicator lamp lights up. Thus, the test components in group a can complete the test of any switch in the left throttle switch package. The test of the right throttle switch package by group b is the same.

[0064] In order to realize the selection of the throttle switch package to be tested, and only a single throttle switch package can be tested at the same time, in the power supply circuit units of group a and group b, a second test control contact is further included respectively. The second test control contact is a normally open contact. The second test control contact S10-R connected in series in the DC power supply circuit of group a is interlocked with each contact pair S1-R to S9-R in the contact group unit of group b; the second test control contact S10-L connected in series in the DC power supply circuit of group b is interlocked with each contact pair S1-L to S9-L in the contact group unit of group a. Then, in a single DC power supply circuit, only when one of the contact pairs in S10-R and S10-L is selected to be a normally open contact closed, can a DC power supply circuit be conducted, so as to perform the switch test of the corresponding throttle switch package.

[0065] Further, in this embodiment, a 10-position interlocking piano key switch is adopted for the contact pairs S1-L to S9-L and the test control contact pair S10-L in the contact group unit, and a 10-position interlocking piano key switch is adopted for the contact pairs S1-R to S9-R and the test control contact pair S10-R. In the 10-position interlocking piano key switch, the switches corresponding to the respective contact pairs can be in the unselected state simultaneously, but only one switch can be pressed at the same time, so that the normally open contacts in the corresponding contact pairs are closed. The above design scheme of this embodiment can realize the following functional combination forms of the test device:

[0066]

[0067] In the above table, Si represents any switch button among S1-S9. The "down" means the switch is selected and pressed, and the "up" means the switch is not pressed, and the corresponding contact pair state is that the normally closed contact is closed and the normally open contact is open.

[0068] Using two interlocking piano key switches to complete the tests of two throttle switch packages respectively can greatly simplify the circuit structure of the test device, reduce the volume of the test device, and can simplify the operation process and improve the test efficiency.

[0069] In this embodiment, when the throttle switch package test device is implemented as an operable test instrument, it further includes a housing for installing the contact group unit, the power supply circuit unit, and the status indication unit; an external connection end is provided on the line connecting the first ends of the normally open contacts and the normally closed contacts in the contact group unit to the resistance measurement module; a socket 01 is provided on the housing corresponding to the external connection end.

[0070] The above socket can facilitate the connection of the external measuring end of the multimeter to directly measure the contact resistance of the conducting switch, or can be used to connect an adjustable resistor to verify the resistance alarm threshold of the resistance measurement module in the status indication unit.

[0071] When directly measuring the contact resistance of the switch, any switch among S1-S9L / S1-S9R can be pressed to make S10-L / S10-R bounce up. Connect the measuring end of the multimeter to the jack connecting the normally open contact of the piano key switch, and move the joystick to the switch position corresponding to the pressed switch to measure the contact resistance of the corresponding switch. Switch to press other switches to measure the contact resistance of other switches.

[0072] When verifying the alarm resistance value of the resistance measurement module:

[0073] Verification of the alarm resistance value of group a: Gently press any button of the group a piano key switch to make all the buttons bounce up, press S10-R, and connect a fixed-value resistor or an adjustable resistor through the jack to verify the resistance alarm function of the status indication unit of group a;

[0074] Verification of the alarm resistance value of Group B: Gently press any key of the Group B key switch to make all keys bounce up. Press S10-L and connect a certain value resistor or adjustable resistor through the jack to verify the resistance alarm function of the Group B status indication unit.

[0075] Since the throttle switch package is connected to the aircraft controller through an aviation plug connector, for the convenience of connection with the throttle switch package during testing, in the single contact group unit of this embodiment, the contacts of all contact pairs are electrically connected to the corresponding switches in the throttle switch package through 2 aviation plug connectors. During testing, first disconnect the 4 aviation plugs connecting the throttle switch package to the aircraft controller, and then connect the 4 aviation plugs in two groups of the test device of this embodiment to the throttle switch package to perform the test operation.

[0076] Specifically, referring to Figure 2 , when performing switch testing using the test device of this embodiment, taking the left throttle switch package test as an example: Press any one of the switches S1-S9L, and at the same time press the corresponding switch of S10-R. The normally closed contact S10-L in the Group A DC power supply circuit remains closed, and the normally open contact S10-R closes. At this time, the Group A DC power supply circuit is turned on, HL-L lights up, and the resistor can obtain power normally. The switches corresponding to the switches in the pressed state among S1-S9L can be tested: The tester moves the joystick. When the joystick reaches the position of this switch, the action indicator light of the Group A switch lights up. Read the angle value displayed on the aircraft screen at this time. If it conforms to the manual, it means that the switch in the current test is qualified. If the resistance value overlimit indicator light of Group A lights up, it means that the contact resistance of the currently conducting switch contact exceeds the limit, and there may be an abnormal contact. After one switch test is completed, switch to press other switches among S1-S9L to test each switch in the left throttle switch package in turn.

[0077] When it is necessary to test the right throttle switch package after the left throttle switch package test is completed, press the switch S10-L in the Group A interlock key switch, make S1-S9L all bounce up, press any one of the switches S1-S9R in the Group B interlock key switch, and make S10-R bounce up. In the Group B DC power supply circuit, the normally open contact of S10-L closes, and the normally closed contact of S10-R closes, and each switch of the right throttle switch package can be tested.

[0078] Embodiment 2

[0079] Different from Embodiment 1, in this embodiment, each resistance measurement module combines a resistance measurement circuit with a microprocessor MCU. Each indication module is provided with 3 indicator lights, which respectively represent that the normally closed contact is conducting, the normally open contact is conducting the switch, and the contact resistance value corresponding to the normally open contact exceeds the limit, and is controlled by the MCU to turn on or off. The resistance measurement circuit is used to measure the contact resistance values when the normally closed contacts and the normally open contacts are conducting after being connected in parallel, and transmit them to different ports of the MCU - two ports respectively set for the corresponding normally open contacts and normally closed contacts. The resistance value alarm threshold condition is preset in the MCU. During operation, the MCU controls the on and off of the 3 indicator lights according to the received resistance value detection result, so as to realize the conduction state indication and the contact resistance value alarm output.

[0080] Embodiment 3

[0081] Reference Figure 1 , this embodiment can realize the test of a single throttle switch package by a single test device. The test device is only provided with a set of contact group unit, a power supply circuit unit and a status indication unit.

[0082] The contact group unit includes contact pairs S1 - S9 respectively set for each switch in a single throttle switch package. Each contact pair includes a normally closed contact and a normally open contact respectively used to connect the normally closed and normally open contacts of a single switch; all the contact pairs in a single contact group unit are interlocked with each other. The first ends of each contact are connected to the status indication unit, and the second ends are the switch contact connection ends;

[0083] The status indication unit includes a resistance measurement module and an indication module. The resistance measurement module is connected to the first ends of each contact in the contact group unit to measure the contact resistance of the switch contact connected when the contact is conducting, and outputs a switch conduction state and / or a status signal of the contact resistance value of the switch contact through the indication module.

[0084] For the specific implementation of the contact group unit and the status indication unit, reference can be made to the implementation manners of the contact group unit and the status knowledge unit in the single - group test component in Embodiment 1 and Embodiment 2.

[0085] The power supply circuit unit of this embodiment includes a DC power supply loop. The DC power supply Vc is sourced from a battery, such as 6 AA batteries. The DC power supply loop can provide a test power supply for the resistance measurement module. A test status indicator light HL and the normally closed contact of a test control switch S10 are connected in series in the DC power supply loop. S10 and S1 - S9 are implemented by a ten - position interlocking piano key switch.

[0086] All the contacts in the contact group unit can be led out through two aviation connectors or other connector forms to connect a single throttle switch package to be tested.

[0087] When applying, press the key switch corresponding to S10, the DC power supply circuit is disconnected, the test stops. Press any one of the switches S1 - S9, the S10 key bounces up, and the corresponding normally closed contact closes, the DC power supply circuit is turned on, the test indicator HL lights up. By switching the pressed state of the switches in S1 - S9, each switch of the throttle switch package can be tested in sequence. The specific test process refers to the process of testing a single throttle switch package in Embodiment 1.

[0088] In order to facilitate verifying the alarm resistance value of the resistance measurement module and facilitating directly measuring the contact resistance of the switch with an external multimeter, in this embodiment, jacks are also provided on the housing of the test device, so that the connection end of the external device can be connected to the line between the first end of the contact pair and the status indication unit through this jack.

[0089] In summary of the above embodiments, the present invention can realize the selection and testing of each switch in the throttle switch package, and can detect and alarm the contact resistance of the switch contacts:

[0090] The contact group unit can be implemented by a piano - key interlock switch. Two piano - key interlock switches can realize the selection of the throttle switch package to be tested and the switching of the switch to be tested; the design of the status display unit can simplify the status display design on the outer panel of the test device, making the test process information more intuitive. The overall device has a simple principle, comprehensive functions, is convenient for the operator, and can greatly improve the test efficiency.

[0091] Since it can also support detecting the status of the switch contacts through an external resistance meter and verifying the resistance alarm threshold of the resistance measurement module in the status display unit of the test device itself through an external resistance, the test device of the present invention can also ensure high test reliability.

[0092] The embodiments of the present invention have been described above in conjunction with the drawings, but the present invention is not limited to the above - mentioned specific embodiments. The above - mentioned specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present invention, those of ordinary skill in the art can also make many forms without departing from the purpose of the present invention and the scope protected by the claims. All of these fall within the protection scope of the present invention.

Claims

1. A throttle switch package testing device, characterized in that, it includes a contact group unit, a power supply circuit unit, and a status indication unit corresponding to a single throttle switch package; the power supply circuit unit provides a test power supply; the contact group unit includes contact pairs respectively arranged corresponding to each switch in a single throttle switch package, and each contact pair includes a normally closed contact and a normally open contact respectively used to connect the normally closed and normally open contacts of a single switch; all the contact pairs in a single contact group unit are interlocked with each other, the first end of each contact is connected to the status indication unit, and the second end is the switch contact connection end; the status indication unit includes a resistance measurement module and an indication module, the resistance measurement module is connected to the first end of each contact in the contact group unit to measure the contact resistance of the switch contact connected when the contact is conducting, and outputs a switch conduction state and / or a status signal of the contact resistance value of the switch contact through the indication module; the resistance measurement module includes a first resistor meter and a second resistor meter with an alarm function, the first resistor meter is connected with a first resistance value status indicator light and a second resistance value status indicator light corresponding to different resistance value alarm thresholds, and the second resistor meter is connected with a third resistance value status indicator light and a fourth resistance value status indicator light corresponding to different resistance value alarm thresholds; the first resistance value status indicator light, the second resistance value status indicator light, the third resistance value status indicator light, and the fourth resistance value status indicator light constitute the indication module; in a single contact group unit, the first ends of all the normally closed contacts are connected in parallel and connected to the resistance signal detection end of the first resistor meter; the second ends of all the normally open contacts are connected in parallel and connected to the resistance signal detection end of the second resistor meter; the power supply circuit unit includes a DC power supply and a test control contact connected in series in the DC power supply loop; the test control contact is a normally closed contact and is interlocked with each contact in the contact group unit.

2. The throttle switch package testing device according to claim 1, characterized in that, the resistance value alarm threshold condition for the first resistor meter to control the first resistance value status indicator light to light up is: the resistance value measurement result is less than or equal to the maximum normal contact resistance value of the switch normally closed contact; the resistance value alarm threshold condition for the first resistor meter to control the second resistance value status indicator light to light up is: the resistance value measurement result is greater than the maximum normal contact resistance value of the switch normally closed contact; the resistance value alarm threshold condition for the second resistor meter to control the third resistance value status indicator light to light up is: the resistance value measurement result is less than or equal to the maximum normal contact resistance value of each switch normally open contact; the resistance value alarm threshold condition for the second resistor meter to control the fourth resistance value status indicator light to light up is: the resistance value measurement result is greater than the maximum normal contact resistance value of each switch normally open contact.

3. The throttle switch package testing device according to claim 1, characterized in that, the second resistance value status indicator light and the fourth resistance value status indicator light share the same resistance value overlimit status indicator light; the first resistor meter and the second resistor meter respectively include a first alarm output port corresponding to a normal resistance value and a second alarm output port corresponding to an overlimit resistance value; The first alarm output ports of the first resistor meter and the second resistor meter are respectively connected to the first resistance value status indicator light and the third resistance value status indicator light; the second alarm output ports of the first resistor and the second resistor meter are connected in parallel and then connected to the resistance value over-limit status indicator light. The first resistance value status indicator light, the third resistance value status indicator light, and the resistance value over-limit status indicator light are indicator lights of different colors.

4. The throttle switch package testing device according to claim 3, characterized in that, A test status indicator light is also connected in series in each of the DC power supply circuits.

5. The throttle switch package testing device according to any one of claims 1-4, characterized in that, There are two sets of the contact group unit, the power supply circuit unit, and the status indication unit, which respectively correspond to the left and right throttle switch packages of the aircraft; In the power supply circuit unit corresponding to the left / right throttle switch package, a second test control contact is also connected in series in the DC power supply circuit. The second test control contact is a normally open contact and is interlocked with each contact in the contact group unit corresponding to the right / left throttle switch package.

6. The throttle switch package testing device according to claim 5, characterized in that, A single contact group unit includes 9 groups of contacts, and the mutually locked test control contacts and the second test control contacts are realized by a ten-position interlocked piano key switch.

7. The throttle switch package testing device according to any one of claims 1-4, characterized in that, In a single contact group unit, the contacts of all contact pairs are electrically connected to the corresponding switches in the throttle switch package through two aviation plug connectors.

8. The throttle switch package testing device according to any one of claims 1-4, characterized in that, The throttle switch package testing device further includes a housing for installing the contact group unit, the power supply circuit unit, and the status indication unit; An external connection end is provided on the line connecting the first ends of the normally open contacts and the normally closed contacts in the contact group unit to the resistance measurement module; a socket is provided on the housing corresponding to the external connection end; A battery mounting seat is also provided in the housing, and the power output connection end of the battery mounting seat is connected to the DC power supply circuit.

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