Aircraft fire protection temperature-sensing loop test box

Abstract

The utility model discloses an airplane fireproof temperature sensing ring line test box, including box body, adjustable resistance circuit and a plurality of control buttons. That airplane fireproof temperature sensing ring line test box adjusts the resistance value of adjustable resistance circuit through pressing each control button, and the display resistance value is adjusted under the control of controller, and the controller controls the relay group to adjust the resistance value of adjustable resistance circuit to correspond with the numerical value of display screen, thereby realizes accurate adjustment to resistance value, and the resistance value of adjustable resistance circuit can be adjusted to any integer in 10000 omega, can satisfy modern airplane fireproof temperature sensing ring line high accuracy test demand, and compared with the existing knob type rheostat, the key adjustment operation is more convenient, and the simple structure is high in portability.

Description

Technical Field

[0001] This utility model relates to a testing device, and more particularly to an aircraft fire-resistant temperature-sensing loop test box. Background Technology

[0002] In the field of aviation safety, the fire protection system of aircraft engines and fuselage is a key line of defense to ensure flight safety, and the reliability of the fire-sensing temperature loop, as a core component for early fire detection, is directly related to whether fire hazards can be warned in a timely manner.

[0003] Existing temperature-sensing loop testing methods have many drawbacks. Traditional test boxes use rotary rheostats, relying on a purely mechanical structure to achieve resistance adjustment. The numerous internal mechanical components result in large size and weight, leading to poor portability and ease of installation and maintenance. Furthermore, the mechanical rotary rheostat is susceptible to mechanical wear and poor contact, limiting the accuracy of resistance adjustment and making it difficult to meet the high-precision testing requirements of modern aircraft fire-resistant temperature-sensing loops.

[0004] Therefore, this application proposes an aircraft fire-resistant temperature-sensing loop test box, which has a simple structure, convenient testing operation, and high testing accuracy. Utility Model Content

[0005] Purpose of the utility model: To provide a novel aircraft fire-resistant temperature-sensing loop test box that is lightweight, portable, simple in structure, easy to operate, and highly accurate.

[0006] Technical Solution: The aircraft fire-resistant temperature-sensing loop test box provided by this utility model includes a box body, an adjustable resistance circuit, and multiple control buttons; a controller is installed inside the box body; a display screen electrically connected to the controller is installed on the box body; two terminals are installed on the box body; the adjustable resistance circuit is conductively connected between the two terminals and is located inside the box body; the controller adjusts the resistance value of the adjustable resistance circuit through a relay group; all control buttons are installed on the box body and are electrically connected to the controller; a battery for powering the controller, display screen, and relay group is installed inside the box body.

[0007] Furthermore, the relay group includes sixteen relays; the adjustable resistor circuit consists of sixteen resistors connected in series; each relay is connected in parallel with each resistor; an electrically controlled switch connected in series with the controller is connected to the power supply line of each relay; the resistance values ​​of the sixteen resistors are 1Ω, 2Ω, 3Ω, 4Ω, 10Ω, 20Ω, 30Ω, 40Ω, 100Ω, 200Ω, 300Ω, 400Ω, 1000Ω, 2000Ω, 3000Ω, and 4000Ω, respectively.

[0008] Furthermore, a gripping groove is provided at the bottom of the box; a flexible padding layer is provided on the inner wall of the gripping groove.

[0009] Furthermore, it also includes a storage structure; the storage structure includes a positioning unit, a shorthand plate, and a pressing plate; a telescopic groove is horizontally provided on the upper part of the box; one side of the shorthand plate is slidably installed in the telescopic groove, and the other side is bent upward to form a baffle for blocking the opening of the telescopic groove; a pull-out slot is provided on the baffle; the positioning unit is located in the telescopic groove and is used to position the shorthand plate; a rotating shaft is fixed on one edge of the pressing plate; the rotating shaft is horizontally mounted on the upper side of the shorthand plate; a torsion spring for driving the pressing plate to press down is installed on the rotating shaft.

[0010] Furthermore, the positioning unit includes a positioning tube and a positioning ball; a hemispherical groove is provided on the insertion side of the stenograph plate; the positioning tube is installed on the bottom of the telescopic groove; the positioning ball is slidably snapped onto the positioning tube, and its lower side is used to snap onto the hemispherical groove after extending out of the positioning tube; a telescopic spring for driving the positioning ball to move downward is installed inside the positioning tube.

[0011] Compared with the prior art, the advantages of this utility model are as follows: the resistance value of the adjustable resistor circuit can be adjusted by pressing the units digit increase button, units digit decrease button, tens digit increase button, tens digit decrease button, hundreds digit increase button, hundreds digit decrease button, thousands digit increase button, and thousands digit decrease button. The adjusted resistance value is displayed on the screen under the control of the controller. After the adjustment is completed, pressing the confirmation button will cause the controller to control the relay group to adjust the resistance value of the adjustable resistor circuit to correspond to the value displayed on the screen, thereby achieving precise adjustment of the resistance value. Moreover, the resistance value of the adjustable resistor circuit can be adjusted to any integer within 10000Ω, which can meet the high-precision testing requirements of modern aircraft fire-resistant temperature sensing loops. At the same time, compared with the existing knob-type rheostats, the button adjustment operation is more convenient, and the structure is simple and highly portable. Attached Figure Description

[0012] Figure 1 This is a top view of the present invention;

[0013] Figure 2 This is the front view of the present invention;

[0014] Figure 3 This is a bottom view of the present invention;

[0015] Figure 4 This is a cross-sectional view of the present invention;

[0016] Figure 5 This is a schematic diagram of the adjustable resistor circuit of this utility model;

[0017] Figure 6 This is a schematic diagram of the circuit structure of this utility model;

[0018] In the diagram: 1. Box body; 2. Display screen; 3. Control buttons; 4. Terminal block; 5. Power switch; 6. Handling slot; 7. Flexible pad; 8. Bottom anti-slip pad; 9. Telescopic groove; 10. Shorthand board; 11. Baffle; 12. Pull-out slot; 13. Hemispherical groove; 14. Positioning tube; 15. Telescopic spring; 16. Positioning ball; 17. T-shaped slider; 18. T-shaped sliding groove; 19. Elastic buckle; 20. Rotating shaft; 21. Pressing plate; 22. Pressing anti-slip pad; 23. Sticky note. Detailed Implementation

[0019] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings, but the protection scope of this utility model is not limited to the described embodiments.

[0020] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0021] In the description of this utility model, it should be understood that the terms "left", "right", "front", "back", "up", "down", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] Example 1:

[0023] like Figure 1-6As shown, the aircraft fire-resistant temperature-sensing loop test box provided by this utility model includes: a box body 1, an adjustable resistance circuit, and multiple control buttons 3; a controller is installed inside the box body 1; a display screen 2 electrically connected to the controller is installed on the box body 1; two terminals 4 are installed on the box body 1; the adjustable resistance circuit is conductively connected between the two terminals 4 and is located inside the box body 1; the controller adjusts the resistance value of the adjustable resistance circuit through a relay group, and the resistance value of the adjustable resistance circuit can be adjusted to any integer within 10000Ω; each control button 3 is installed on the box body 1 and is electrically connected to the controller; each control button is a confirmation button, a units digit increment button, a units digit decrement button, a tens digit increment button, a tens digit decrement button, a hundreds digit increment button, a hundreds digit decrement button, a thousands digit increment button, and a thousands digit decrement button; a battery for powering the controller, the display screen 2, and the relay group is installed inside the box body 1; a power switch 5 connected in series with the power supply line of the battery is installed on the box body 1.

[0024] The resistance value of the adjustable resistor circuit can be adjusted by pressing the buttons for increasing the units digit, decreasing the units digit, increasing the tens digit, decreasing the tens digit, increasing the hundreds digit, decreasing the hundreds digit, increasing the thousands digit, and decreasing the thousands digit. The adjusted resistance value is displayed on the display screen 2 under the control of the controller. After the adjustment is completed, pressing the confirmation button will cause the controller to control the relay group to adjust the resistance value of the adjustable resistor circuit to correspond to the value displayed on the display screen 2, thereby achieving precise adjustment of the resistance value. The resistance value of the adjustable resistor circuit can be adjusted to any integer within 10000Ω, which can meet the high-precision testing requirements of modern aircraft fire-resistant temperature sensing loops. At the same time, compared with the existing knob-type rheostats, the button adjustment operation is more convenient, and the structure is simple and highly portable.

[0025] Furthermore, the relay group includes sixteen relays; the adjustable resistor circuit consists of sixteen resistors connected in series; each relay is connected in parallel with each resistor; each relay is powered by a battery; an electronically controlled switch connected in series with the controller is connected to the power supply line of each relay; the resistance values ​​of the sixteen resistors are 1Ω, 2Ω, 3Ω, 4Ω, 10Ω, 20Ω, 30Ω, 40Ω, 100Ω, 200Ω, 300Ω, 400Ω, 1000Ω, 2000Ω, 3000Ω, and 4000Ω, respectively.

[0026] The resistance value of the relay is much smaller than that of each individual resistor. By switching the relay on and off, the connection or disconnection of resistors can be flexibly controlled, providing hardware support for precise combination of resistance values, thereby enabling adjustment of the resistance value of the adjustable circuit. By scientifically planning the resistance values ​​and utilizing the cumulative resistance characteristic of resistors in series, a wide range of resistance values ​​can be covered with the fewest components. For example, small resistance values ​​enable precise combination, while large resistance values ​​meet high resistance value testing requirements, fully adapting to the diverse testing scenarios of aircraft fire-resistant temperature sensing loops. Signals are sent to the controller via the units digit increase, units digit decrease, tens digit increase, tens digit decrease, hundreds digit increase, hundreds digit decrease, thousands digit increase, and thousands digit decrease buttons, causing the controller to control the corresponding relays to be energized or de-energized through various electronic switches, ensuring that the resistance value of the adjustable resistor circuit matches that displayed on screen 2.

[0027] Furthermore, a gripping groove 6 is longitudinally provided on the left side of the lower side of the box body 1; a flexible pad 7 is provided on the inner wall of the left side of the gripping groove 6; and bottom anti-slip pads 8 are provided at the four top corners of the lower side of the box body 1.

[0028] The grip groove 6 facilitates easy gripping, while the flexible pad 7 enhances grip comfort; the bottom anti-slip pad 8 provides an anti-slip effect when placed and used.

[0029] Furthermore, it also includes a storage structure; the storage structure includes a positioning unit, a shorthand plate 10, and a pressing plate 21; a telescopic groove 9 is provided on one vertical side of the box body 1; a T-shaped sliding groove 18 is provided on the lower side wall of the telescopic groove 9; a T-shaped slider 17 that slides and snaps onto the T-shaped sliding groove 18 is provided on one edge of the lower side of the shorthand plate 10; the opposite side of the shorthand plate 10 is folded upward to form a baffle 11, and the baffle 11 is used to cover the opening of the telescopic groove 9; a pull-out slot 12 is provided in the middle of the upper edge of the baffle 11; on the upper edge of the baffle 11... Two rotating seats are provided on one side edge; a rotating shaft 20 is fixed on one side edge of the pressing plate 21; the two ends of the rotating shaft 20 are rotatably mounted on the two rotating seats respectively, and a torsion spring for driving the pressing plate 21 to press down is elastically provided between the rotating shaft 20 and the rotating seats; the pressing plate 21 is used to press on the sticky note 23; a pressing anti-slip pad 22 is provided on the lower side of the pressing plate 21; an elastic buckle 19 for holding the pen is fixed on the upper side of the shorthand plate 10; a positioning unit is installed in the telescopic groove 9 for positioning the shorthand plate 10.

[0030] The pen and notepad 23 are clamped and held in place by the elastic buckle 19 and the pressing plate 21 on the stenograph board 10, and stored in the telescopic groove 9 for easy data recording; the stenograph board 10 can be easily pulled out by the pull-out slot 12.

[0031] Furthermore, the positioning unit includes a positioning tube 14 and a positioning ball 16; the positioning tube 14 is vertically fixed on the bottom of the telescopic groove 9; the positioning ball 16 slides vertically along the inner wall of the positioning tube 14; the diameter of the lower opening of the positioning tube 14 is smaller than the diameter of the positioning ball 16, and the lower side of the positioning ball 16 extends out of the lower opening of the positioning tube 14; a telescopic spring 15 is elastically supported between the positioning ball 16 and the bottom of the positioning tube 14; a hemispherical groove 13 is provided on the edge of the insertion side of the shorthand plate 10, and the protruding side of the positioning ball 16 is used to snap onto the hemispherical groove 13.

[0032] The positioning ball 16 is driven to move downward by the extension spring 15, so that the lower side of the positioning ball 16 extends out of the positioning tube 14 and is locked onto the hemispherical groove 13, which has a certain positioning effect on the stenograph plate 10. At the same time, the surface of the positioning ball 16 is smooth, which makes it easy for the edge of the stenograph plate 10 to move upward under pressure. The lower tube opening of the positioning tube 14 can be used to lock the positioning ball 16 and prevent the positioning ball from falling out of the positioning tube 14.

[0033] In the aircraft fireproof temperature sensing loop test box provided by this utility model, the controller adopts an existing single-chip microcomputer control module; the relay adopts an existing relay; the electric control switch adopts an existing electric control switch; and the resistor adopts an existing resistor.

[0034] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the present invention itself. Various changes in form and detail may be made to the present invention without departing from the spirit and scope of the appended claims.

Claims

1. An aircraft fire-resistant temperature-sensing loop test box, characterized in that: The device includes a housing (1), an adjustable resistor circuit, and multiple control buttons (3); a controller is installed inside the housing (1); a display screen (2) electrically connected to the controller is installed on the housing (1); two terminals (4) are installed on the housing (1); the adjustable resistor circuit is electrically connected between the two terminals (4) and is located inside the housing (1); the controller adjusts the resistance value of the adjustable resistor circuit through a relay group; each control button (3) is installed on the housing (1) and is electrically connected to the controller; a battery is installed inside the housing (1) to power the controller, the display screen (2), and the relay group.

2. The aircraft fire-resistant temperature-sensing loop test box according to claim 1, characterized in that: The relay group consists of sixteen relays; the adjustable resistor circuit is composed of sixteen resistors connected in series; each relay is connected in parallel with each resistor; an electric control switch connected in series with the controller is connected to the power supply line of each relay; the resistance values ​​of the sixteen resistors are 1Ω, 2Ω, 3Ω, 4Ω, 10Ω, 20Ω, 30Ω, 40Ω, 100Ω, 200Ω, 300Ω, 400Ω, 1000Ω, 2000Ω, 3000Ω, and 4000Ω.

3. The aircraft fire-resistant temperature-sensing loop test box according to claim 1, characterized in that: A holding slot (6) is provided at the bottom of the box body (1); a flexible pad (7) is provided on the inner wall of the holding slot (6).

4. The aircraft fire-resistant temperature-sensing loop test box according to claim 1, characterized in that: It also includes a storage structure; the storage structure includes a positioning unit, a shorthand plate (10) and a pressing plate (21); a telescopic groove (9) is horizontally provided on the upper part of the box body (1); one side of the shorthand plate (10) is slidably installed in the telescopic groove (9), and the other side is bent upward to form a baffle (11) for blocking the opening of the telescopic groove (9); a pull-out slot (12) is provided on the baffle (11); the positioning unit is located in the telescopic groove (9) for positioning the shorthand plate (10); a rotating shaft (20) is fixed on one edge of the pressing plate (21); the rotating shaft (20) is horizontally installed on the upper side of the shorthand plate (10); a torsion spring for driving the pressing plate (21) to press down is installed on the rotating shaft (20).

5. The aircraft fire-resistant temperature-sensing loop test box according to claim 4, characterized in that: The positioning unit includes a positioning tube (14) and a positioning ball (16); a hemispherical groove (13) is provided on the insertion side of the stenograph plate (10); the positioning tube (14) is installed on the bottom of the telescopic groove (9); the positioning ball (16) is slidably snapped onto the positioning tube (14), and the lower side is used to snap onto the hemispherical groove (13) after extending out of the positioning tube (14); a telescopic spring (15) is installed inside the positioning tube (14) to drive the positioning ball (16) to move downward.

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