Impedance detection device

Abstract

Impedance detection equipment for detecting the impedance of an overheat detection line on an aircraft comprises a connector for connecting the overheat detection line, a heating element for heating the overheat detection line, a controller and an impedance measurer which are connected with the connector, a power supply for supplying power to the impedance detection equipment, and a clamping device, the heating element is arranged on the clamping device, and the clamping device is configured to clamp the overheat detection line and heat the overheat detection line through the heating element, so that the overheat detection line is stably heated and detected, the impedance detection efficiency is improved, and whether the function of the overheat detection line is normal or not can be independently judged. In addition, the impedance detection equipment is compact in structure, easy to carry and suitable for a narrow environment.

Description

Technical Field

[0001] The utility model belongs to the technical field of aircraft detection equipment, and in particular relates to an impedance detection device used for heating and detecting the impedance of an overheat detection line. Background Art

[0002] The air source system of civil aircraft draws air from the engine, auxiliary power unit and the ground, and after temperature and pressure adjustment, provides air source for cabin air conditioning, pressurization, wing anti-icing, engine starting, hydraulic oil tank and drinking water pressurization. The air source system uses bleed air ducts to provide high-temperature bleed air from the air supply end to the air user end. The bleed air ducts are arranged in multiple areas such as the fuselage, wings and suspension. If the high-temperature bleed air inside the bleed air duct leaks, it will not only affect the function of the system, but also cause damage to other systems or aircraft structures. It is generally stipulated that for the bleed air duct system of turbine engines and auxiliary power units, if the duct is damaged at any part between the bleed air port of the air duct and the aircraft's air user, no harm shall be caused. In order to ensure the safety of the aircraft, it is necessary to detect the high-temperature bleed air ducts in these areas.

[0003] Civil aircraft usually use overheat detection wire to detect high temperature bleed air duct leakage and main cabin overheating. The overheat detection wire is mainly composed of three parts: a central conductor 2, a heat-sensitive material layer 3 and a metal shell 4. Figure 1 As shown. Thermistor materials usually use eutectic salt materials. Thermistor material layer extruded and filled between the center conductor and the metal shell is sensitive to temperature. Thermistor material layer is solid at room temperature, and the impedance between the center conductor and the ground is very large (megaohm level). When the temperature rises to the alarm temperature, thermistor material layer changes from solid to liquid, its resistance drops rapidly, and the metal shell and the center conductor are connected. The fire protection system control device can give an overheating alarm by monitoring the impedance of the overheating detection line. The maximum length of the overheating detection line may be more than 3 meters.

[0004] Therefore, if there is a fault in the overheat detection line, the fire protection system will not be able to give an overheat alarm in time, which is not conducive to the safety of the aircraft. At present, a common fault of the overheat detection line is that the thermosensitive material is not fully filled. In some positions of the entire overheat detection line, there may be a lack of thermosensitive material, resulting in the lack of thermosensitive material at that location, so that the overheat detection function will be lost at that location. This fault will cause the impedance at that location to be unable to be reduced to the alarm impedance when the overheat detection line reaches the alarm temperature, that is, the overheat detection line cannot provide an overheat alarm function. In addition, this fault is a hidden fault and cannot be discovered through external inspection, but can only be checked by measuring impedance.

[0005] In the prior art, a hot air gun method is used to heat the overheat detection line section by section and measure its impedance. This method has shortcomings: it is relatively rough, and the detection results are greatly affected by human factors; the equipment is not suitable for operation in the narrow space on the aircraft. The hot air gun method has high requirements for operation, and it is difficult to implement on-board operation. Specifically, when heating the overheat detection line, the overheat detection line must be kept at 1-1.25in from the hot air outlet, and the heating time must be at least 60 seconds and cannot exceed 120 seconds. For the overheat detection line that has been installed on the aircraft, when the overheat detection line is heated by a handheld hot air gun, the narrow space on the aircraft makes this operation difficult to perform. Therefore, the hot air gun method has high requirements for operation, and it is difficult to implement on-board operation.

[0006] Therefore, there is a need for an impedance detection device for heating and detecting the impedance of an overheat detection line, which has simpler operation, more stable detection and more compact structure. Utility Model Content

[0007] In order to solve the problems existing in the above-mentioned prior art, the utility model proposes an impedance detection device for heating and detecting the impedance of the overheat detection line. The purpose is to provide an improved impedance detection scheme, so that the detection process of the overheat detection line impedance becomes simpler, more stable, and has smaller errors, and can independently determine whether the overheat detection line function is normal. In addition, the impedance detection device has a compact structure and can be used in narrow spaces, making it applicable to a wider range of scenarios.

[0008] Therefore, the utility model proposes an impedance detection device, which is used to detect the impedance of an overheat detection line on an aircraft. The impedance detection device includes a connector for connecting the overheat detection line, a heating element for heating the overheat detection line, a controller and an impedance measurer connected to the connector, and a power supply for supplying power to the impedance detection device. The impedance detection device also includes a clamping device, on which the heating element is arranged, and the clamping device is configured to clamp the overheat detection line and heat the overheat detection line through the heating element.

[0009] According to the above technical solution, the impedance detection device of the utility model can achieve the following beneficial technical effects: through the clamping device, the impedance detection process of the overheat detection line is made more stable and the operation is simpler.

[0010] In a preferred embodiment of the present invention, the clamping device includes two clamping members, each of which includes a clamping section and an operating section, the clamping section is configured to clamp the overheat detection line on the inner side of the clamping section, and the heating element is arranged on the inner side of the clamping section of at least one of the clamping members.

[0011] According to the above technical scheme, the impedance detection device of the utility model can achieve the following beneficial technical effects: the overall structure of the impedance detection device is compact, easy to use, stable to operate, and easy to carry.

[0012] In an alternative embodiment of the present invention, a hinge portion is provided between the clamping sections and the operating sections of the two clamping members, and the operating sections extend at an angle relative to the clamping sections, and the two clamping members are hinged to each other at the hinge portion.

[0013] According to the above technical solution, the impedance detection device of the utility model can achieve the following beneficial technical effects: the impedance detection device is made more compact and portable, and the hinged portion is also conducive to stable operation.

[0014] In a preferred embodiment of the present invention, a heat storage member configured to store heat is further included, the heat storage member is arranged on the inner side of the clamping section, and the heat storage member includes a clamping surface and a side surface contacting the overheat detection line.

[0015] According to the above technical scheme, the impedance detection device of the utility model can achieve the following beneficial technical effects: improving the heating and heat preservation effect of the impedance detection device, reducing the time required for measurement, and improving the detection efficiency.

[0016] In a preferred embodiment of the present invention, the heating element is arranged in the heat storage element.

[0017] According to the above technical scheme, the impedance detection device of the utility model can achieve the following beneficial technical effects: the heating element is arranged in the heat storage element, which improves the heating and heat preservation effect of the impedance detection device, reduces the time required for measurement, and improves the detection efficiency.

[0018] In a preferred embodiment of the present utility model, a heat preservation layer is provided on the clamping surface of the heat storage element.

[0019] According to the above technical scheme, the impedance detection device of the utility model can achieve the following beneficial technical effects: arranging a thermal insulation layer on the clamping surface of the heat storage component can improve the heating and insulation effects of the impedance detection device, reduce the time required for measurement, improve the detection efficiency, reduce heat diffusion, reduce the temperature of the surface of the impedance detection device, and reduce the risk of burns to surrounding structures and users.

[0020] In a preferred embodiment of the present utility model, the heat preservation layer on the clamping surface of the heat storage element is configured with a groove for accommodating the overheat detection line.

[0021] According to the above technical scheme, the impedance detection device of the utility model can achieve the following beneficial technical effects: the overheat detection line is stably accommodated in the groove, the detection efficiency of the impedance detection device is further improved, and the impedance detection process of the overheat detection line is made more stable.

[0022] In an embodiment of the present utility model, a groove for accommodating the overheat detection wire is configured on the clamping surface of the heat storage member.

[0023] According to the above technical scheme, the impedance detection device of the utility model can achieve the following beneficial technical effects: the overheat detection line is stably accommodated in the groove, the detection efficiency of the impedance detection device is further improved, and the impedance detection process of the overheat detection line is made more stable.

[0024] In a preferred embodiment of the present utility model, a heat preservation layer is provided on the side surface of the heat storage element.

[0025] According to the above technical scheme, the impedance detection equipment of the utility model can achieve the following beneficial technical effects: it can improve the heating and heat preservation effects of the impedance detection equipment, improve the detection efficiency, reduce heat diffusion, reduce the surface temperature of the impedance detection equipment, and reduce the risk of burns to surrounding structures and users.

[0026] In a preferred embodiment of the present invention, a temperature sensor is also included.

[0027] According to the above technical solution, the impedance detection device of the utility model can achieve the following beneficial technical effects: monitoring the temperature of the overheat detection line through feedback from the temperature sensor.

[0028] In a preferred embodiment of the present invention, the clamping device is connected to the controller and the impedance meter via an operating cable.

[0029] According to the above technical solution, the impedance detection device of the utility model can achieve the following beneficial technical effects: through the controller and the impedance measurer, the heating temperature of the overheat detection line can be monitored and controlled, and its impedance value can be detected.

[0030] In a preferred embodiment of the present invention, the controller and the impedance measurer are constructed as one body.

[0031] According to the above technical solution, the impedance detection device of the utility model can achieve the following beneficial technical effects: the overall structure of the impedance detection device is compact and easy to carry.

[0032] In a preferred embodiment of the present invention, one or more springs are arranged between the two clamping members, and the one or more springs are configured to bias the clamping device in a closed state.

[0033] According to the above technical solution, the impedance detection device of the utility model can achieve the following beneficial technical effects: the stability of the impedance detection device can be improved by pre-tensioning the spring.

[0034] In an alternative embodiment of the present invention, one or more springs are configured to electrically connect the clamping sections of the two clamps, and the controller and the impedance measurer are coupled to at least one of the two clamps via an operating cable.

[0035] According to the above technical solution, the impedance detection device of the utility model can achieve the following beneficial technical effects: simplifying the electrical connection between the controller and the impedance measurer and the clamping device.

[0036] The features of the above-described embodiments may be combined in any practicable manner to form an embodiment having a combination of those features.

[0037] It should be understood that the above utility model summary is provided to introduce in a simplified form a selection of concepts further described in the detailed description. It is not meant to identify the key or essential features of the claimed subject matter, the scope of which is solely defined by the appended claims.

[0038] Furthermore, the claimed subject matter is not limited to implementations that solve any disadvantages noted above or in any part of this disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Further features and exemplary embodiments and advantages of the present invention are explained in more detail below with reference to the accompanying drawings. It will be appreciated that this embodiment is not exhaustive of the full scope of the present invention. It will be further appreciated that some or all of the features described below may also be combined in other ways, including:

[0040] Figure 1 It is a schematic diagram of the overheat detection line construction;

[0041] Figure 2 is a schematic diagram of an impedance detection device according to a first embodiment of the utility model;

[0042] Figure 3 is a schematic diagram of an impedance detection device according to a second embodiment of the utility model;

[0043] Figure 4 is a schematic diagram of an impedance detection device according to a third embodiment of the present utility model.

[0044] Reference numerals list

[0045] 1 Overheat detection line;

[0046] 2 center conductor;

[0047] 3. Thermosensitive material layer;

[0048] 4. Metal casing;

[0049] 100 Impedance detection equipment;

[0050] 101 clamping device;

[0051] 102 heat storage components;

[0052] 103 heating element;

[0053] 104 Insulation layer;

[0054] 105 grooves;

[0055] 106 temperature sensor;

[0056] 107 Controller and Impedance Meter

[0057] 108 operating cables;

[0058] 109 finished cables;

[0059] 110 connector;

[0060] 111 a first clamping member;

[0061] 111a a first clamping section;

[0062] 111b a first operating section;

[0063] 112 second clamping member;

[0064] 112a second clamping section;

[0065] 112b a second operating section;

[0066] 115 Spring;

[0067] 118 Power supply;

[0068] 200 Impedance detection equipment;

[0069] 201 clamping device;

[0070] 202 heat storage components;

[0071] 203 heating element;

[0072] 204 insulation layer;

[0073] 205 grooves;

[0074] 206 temperature sensor;

[0075] 207 Controller and Impedance Meter

[0076] 208 operating cables;

[0077] 209 finished cables;

[0078] 210 connector;

[0079] 211 first clamping member;

[0080] 211a first clamping section;

[0081] 211b first operating section;

[0082] 212 second clamping member;

[0083] 212a second clamping section;

[0084] 212b second operation section;

[0085] 216 hinge;

[0086] 218 Power supply;

[0087] 300 Impedance detection equipment.

[0088] 301 clamping device;

[0089] 302 heat storage components;

[0090] 303 heating element;

[0091] 304 insulation layer;

[0092] 305 groove;

[0093] 306 temperature sensor;

[0094] 307 controller and impedance measurer 308 operation cable;

[0095] 309 finished cables;

[0096] 310 connector;

[0097] 311 first clamping member;

[0098] 311a first clamping section;

[0099] 311b first operating section;

[0100] 312 second clamping member;

[0101] 312a second clamping section;

[0102] 312b second operation section;

[0103] 315 Spring;

[0104] 316 hinge;

[0105] 318 Power supply. DETAILED DESCRIPTION

[0106] The present invention is described more fully below with reference to the accompanying drawings, in which exemplary embodiments of the present invention are described. Obviously, all features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any way. Any feature disclosed in this specification, unless otherwise described, can be replaced by other alternative features that are equivalent or have similar purposes, that is, unless otherwise described, each feature is just an example of a series of equivalent or similar features. The technical solution of the present invention is described in many aspects in combination with the figures and embodiments below.

[0107] The impedance detection device according to the utility model can be used to heat and detect the impedance of an overheat detection line, and can be applied to the field of overheat detection line detection, or to the field where impedance detection of heat-sensitive materials is required.

[0108] In the present invention, serial numbers "first", "second", etc. do not represent order (for example, do not imply a precedence relationship unless explicitly stated) or priority or importance. The above serial numbers are only to indicate that they are different independent devices, elements or steps.

[0109] In the present invention, the terms "inside", "outside", "inner", "external", etc. are only used to describe the relative positions of various elements.

[0110] <First Embodiment>

[0111] Figure 1 The schematic diagram of the structure of the overheat detection line 1 in the prior art is shown. The impedance detection device according to the utility model can be used for heating and detecting such as Figure 1 The impedance of the overheat detection line 1 shown is used to determine whether there is a fault of incomplete filling of the heat-sensitive material.

[0112] Figure 2 The impedance detection device 100 according to the first embodiment of the utility model is shown. As shown in the figure, the impedance detection device 100 includes a clamping device 101 for clamping the overheat detection line 1 to be tested, so that the detection process is more stable. The clamping device 101 includes an inner side facing the overheat detection line 1 to be tested and an outer side away from the overheat detection line 1 to be tested.

[0113] Preferably, the clamping device comprises a first clamping member 111 and a second clamping member 112, wherein the first clamping member 111 comprises a first clamping section 111a and a first operating section 111b, and the second clamping member 112 comprises a second clamping section 112a and a second operating section 112b. Preferably, an obtuse angle is formed between the first clamping section 111a and the first operating section 111b of the first clamping member 111, so as to facilitate operation. Alternatively, the first clamping section 111a and the first operating section 111b of the first clamping member 111 are parallel to each other. Preferably, the first clamping member 111 and the second clamping member 112 are symmetrically constructed.

[0114] The impedance detection device 100 includes one or more heating elements 103, which are arranged on the clamping device 101, and are particularly arranged on the inner side of at least one of the first clamping section 111a and the second clamping section 112a. Preferably, the impedance detection device 100 also includes a heat storage element 102. Optionally, the impedance detection device 100 may also include a heat preservation layer 104 and a temperature sensor 106.

[0115] The heat storage element 102 can be used to store heat and improve heating efficiency. The heat storage element 102 includes a side surface and a clamping surface in contact with the overheat detection line 1. Preferably, the heat storage element 102 is a heat storage copper block, but the heat storage element 102 can also be made of other metals with good heat storage performance. Preferably, the heat storage element 102 is provided with one or more slots for accommodating the heating element 103 and / or the temperature sensor 106. Alternatively, the heat storage element 102 may be hollow, in which the heating element 103 is accommodated. The heat storage element 102 is arranged on the inner side of the clamping device 101, in particular, on the inner side of at least one of the first clamping section 111a and the second clamping section 112a.

[0116] One or more heating elements 103 can be used to heat the overheat detection line 1. Preferably, the heating element 103 is configured to be arranged in the heat storage element 102. Preferably, the heating element 103 is inserted into a slot on the heat storage element 102, and its shape is adapted to the corresponding slot. Preferably, the heating element 103 and the corresponding slot are cylindrical, that is, the heating element 103 is a cylindrical heating rod, such as Figure 2 As shown, it can also be in other shapes, for example, the heating element 103 can be a sheet-shaped heating sheet, and the corresponding slot can be an elongated slit. Alternatively, the heating element 103 can be configured to be surrounded by the heat storage element 102, that is, to be accommodated in a cavity provided in the heat storage element 102.

[0117] The thermal insulation layer 104 can be used to improve the heating efficiency and prevent the user from being directly scalded. Preferably, the thermal insulation layer 104 includes a thermal insulation material arranged on the clamping surface of the heat storage element 102. More preferably, the thermal insulation layer 104 also includes a thermal insulation material arranged on the side surface of the heat storage element 102. More preferably, the thermal insulation layer 104 is also configured to appropriately deform to cover the overheat detection line 1 when the clamping device 101 clamps the overheat detection line 1. For example, the thermal insulation layer 104 can be a layer of thermal insulation cotton, or it can be other elastically deformable materials with thermal insulation properties.

[0118] Preferably, the heat preservation layer 104 disposed on the clamping surface of the heat storage member 102 is also configured with a groove 105 for accommodating the overheat detection wire 1. When the clamping device 101 clamps the overheat detection wire 1, the overheat detection wire 1 is accommodated in the groove 105, so as to provide a more stable clamping effect for the overheat detection wire 1 and improve the heating efficiency. Alternatively, in an embodiment where the heat preservation layer 104 is not disposed on the clamping surface of the heat storage member 102, a groove for accommodating the overheat detection wire 1 may be configured on the clamping surface of the heat storage member 102.

[0119] The temperature sensor 106 of the heating element can be used to monitor the temperature of the overheat detection line 1. Preferably, the temperature sensor 106 is configured to be arranged in a slot of the heat storage element 102. Alternatively, the temperature sensor 106 can be configured to be enclosed by the heat storage element 102, that is, to be accommodated in a cavity provided in the heat storage element 102. Preferably, the temperature sensor 106 is a thermocouple.

[0120] The impedance detection device 100 further includes a controller and an impedance measurer for controlling the heating of the overheat detection wire 1 and measuring its impedance. Preferably, the controller and the impedance detector are constructed as one body, that is, as an integrated controller and impedance measurer 107 as shown in the figure.

[0121] The impedance detection device 100 further includes an operating cable 108 , a finished cable 109 , a connector 110 , and a power source 118 .

[0122] One end of the operating cable 108 is connected to the clamping device, and the other end is connected to the controller and the impedance measuring device 107, so as to connect the clamping device with the controller and the impedance measuring device 107. The controller and the impedance measuring device 107 can adjust the heating element according to the temperature value measured by the temperature sensor 106, so as to control the heating temperature of the overheat detection line 1. The connector 110 can be used to connect the overheat detection line 1 to be measured. One end of the finished cable 109 is connected to the connector 110, and the other end is connected to the controller and the impedance measuring device 107, so as to connect the overheat detection line 1 connected to the connector 110 with the controller and the impedance measuring device 107, so that the controller and the impedance measuring device 107 can detect the impedance value of the overheat detection line 1, and analyze whether the overheat detection line 1 has a fault such as incomplete filling of the thermosensitive material in combination with the temperature value measured by the temperature sensor 106. The power supply 118 can be used to supply power to the controller and the impedance measuring device 107 and the clamping device 101.

[0123] As shown in the figure, the controller and the impedance measurer 107 of the impedance detection device 100 are connected to the first clamping member 111 and the second clamping member 112 through the operating cable 108, and are connected to the heating elements at the respective clamping sections 111a and 112a through the built-in cables of the first clamping member 111 and the second clamping member 112. However, in an alternative embodiment not shown, the first clamping member 111 and the second clamping member 112 can also be directly connected to the power supply 118 and powered by the power supply 118.

[0124] The impedance detection device 100 further includes one or more springs 115 disposed between the first clamping member 111 and the second clamping member 112 . The springs 115 are configured to bias the clamping device 101 in a closed state to improve the stability of the clamping operation.

[0125] Optionally, one or more springs 115 can be configured to electrically connect the first clamping section 111a of the first clamping member 111 with the second clamping section 112a of the second clamping member 112, for example, by a built-in cable. In this embodiment, the controller and the impedance measurer 107 of the impedance detection device 100 are connected to one of the first clamping member 111 and the second clamping member 112 via the operating cable 108.

[0126] The following describes the operation method of the impedance detection device according to the first embodiment 100 of the present invention:

[0127] When the clamping device 101 of the clamping device is closed, the temperature in the groove 105 on the insulation layer 104 is measured using a temperature sensor 106 (e.g., a thermocouple), and a corresponding relationship between the temperature of the groove 105 and the measured temperature of the built-in temperature sensor 106 is established to complete the calibration of the temperature of the overheat detection line 1. The steps of using the impedance detection device 100 are as follows:

[0128] a) turning on the impedance detection device 100, inputting a specified heating temperature into the integrated controller and impedance measurement device 107 according to the type of the overheat detection line 1, and turning on the heating function;

[0129] b) After the controller and the impedance measuring device 107 indicate that the heating temperature is stable, the overheat detection line 1 is connected to the connector 110, the operating sections 111b and 112b of the first clamping member 111 and the second clamping member 112 are pressed, the clamping sections 111a and 112a of the first clamping member 111 and the second clamping member 112 are opened, and the overheat detection line 1 to be measured is arranged in the groove 105 of the thermal insulation layer 104 and then the overheat detection line 1 is clamped;

[0130] c) Press the start measurement button at the controller and the impedance measuring device 7 to start measuring and recording the temperature, impedance and measurement time of the overheat detection line 1;

[0131] d) After the impedance of the overheat detection line 1 is stable or the measurement time reaches a predetermined time (for example, 2 minutes), stop the measurement, turn off the impedance detection device 100, take out the overheat detection line 1, export the required data, and analyze it to determine whether the overheat detection line 1 has a fault.

[0132] <Second Embodiment>

[0133] Figure 3 FIG. 2 shows an impedance detection device 200 according to a second embodiment of the present invention. Figure 2 The impedance detection device 100 includes a clamping device 201 for clamping the overheat detection line 1 to be tested, so that the detection process is more stable. A heat storage member 202 similar to the heat storage member 102, such as a heat storage copper block 202, is arranged on the inner side of the clamping device 201. Preferably, one or more slots are arranged in the heat storage member 202. One or more heating members 203 for heating the overheat detection line 1 and / or a temperature sensor 206 for monitoring the heating temperature are arranged in the slot. A heat preservation layer 204, such as heat preservation cotton 204, is arranged on the clamping surface of the heat storage member 202 to improve the heating efficiency. More preferably, a heat preservation layer 204 is also arranged on the side surface of the heat storage member 202. More preferably, a groove 205 for accommodating the overheat detection line 1 is constructed on the heat preservation layer 204, such as heat preservation cotton 204, on the clamping surface of the heat storage member 202.

[0134] Similar to Figure 2 The impedance detection device 100, Figure 3The clamping device of the impedance detection apparatus 200 shown includes a first clamping member 211 and a second clamping member 212. The first clamping member 211 includes a first clamping section 211a and a first operating section 211b, and the second clamping member 212 includes a second clamping section 212a and a second operating section 212b.

[0135] The controller and impedance measurer 207 of the impedance detection device 200 are connected to the first clamping member 211 and the second clamping member 212 through the operating cable 208, and are electrically connected to the components at the respective clamping sections 211a and 212a through the built-in cables of the first clamping member 211 and the second clamping member 212. The impedance detection device 200 also includes a finished cable 209 and a connector 210 for connecting the overheat detection line 1. The finished cable 209 connects the connector 210 to the controller and the impedance measurer 207, thereby connecting the overheat detection line 1 connected to the connector 210 to the controller and the impedance measurer 207, so as to monitor the temperature of the overheat detection line 1 and measure its impedance. The impedance detection device 200 also includes a power supply 218 for supplying power to the controller and the impedance measurer 207 and each clamping device.

[0136] The above features of the impedance detection device 200 are the same or substantially the same as the corresponding features of the impedance detection device 100, and can be further described with reference to the above description of the corresponding features of the impedance detection device 100. The difference between them is that the first clamping member 211 and the second clamping member 212 are connected to each other through the hinge 216, so that the first clamping member 211 and the second clamping member 212 can pivot relative to each other, thereby opening or closing the clamping device 201 to achieve the loosening and clamping of the overheat detection line 1.

[0137] The operation method of the impedance detection device 200 is similar to the operation method of the impedance detection device 100 .

[0138] <Third Embodiment>

[0139] Figure 4 FIG. 3 shows an impedance detection device 300 according to a third embodiment of the present invention. Figure 1 , 2The impedance detection device 100, 200, the impedance detection device 300 includes a clamping device 301 for clamping the overheat detection line 1 to be tested, so that the detection process is more stable. A heat storage element 302 similar to the heat storage element 102, 202, such as a heat storage copper block 302, is arranged on the clamping device 301. Preferably, one or more slots are arranged in the heat storage element 302. One or more heating elements 303 for heating the overheat detection line 1 and / or a temperature sensor 306 for monitoring the heating temperature are arranged in the slot. A heat preservation layer 304, such as heat preservation cotton 304, is arranged on the clamping surface of the heat storage element 302 to improve the heating efficiency. More preferably, a heat preservation layer 304 is also arranged on the side surface of the heat storage element 302. More preferably, a groove 305 for accommodating the overheat detection line 1 is constructed on the heat preservation layer 304, such as heat preservation cotton 304, on the clamping surface of the heat storage element 302.

[0140] Similar to Figure 3 The impedance detection device 200, Figure 4 The clamping device of the impedance detection device 300 shown includes a first clamping member 311 and a second clamping member 312. The first clamping member 311 includes a first clamping section 311a and a first operating section 311b, and the second clamping member 312 includes a second clamping section 312a and a second operating section 312b. The first clamping member 311 and the second clamping member 312 are connected to each other through a hinge 316, so that the first clamping member 311 and the second clamping member 312 can pivot relative to each other, thereby opening or closing the clamping device 301 to achieve the loosening and clamping of the overheat detection line 1.

[0141] Similar to Figure 3 The impedance detection device 200, the controller and impedance measurer 307 of the impedance detection device 300 are connected to the first clamping member 311 and the second clamping member 312 through the operating cable 308, and are electrically connected to the components at the respective clamping sections 311a and 312a through the built-in cables of the first clamping member 311 and the second clamping member 312. The impedance detection device 300 also includes a finished cable 309 and a connector 310 for connecting the overheat detection line 1. The finished cable 309 connects the connector 310 to the controller and the impedance measurer 307, so that the overheat detection line 1 connected to the connector 310 is connected to the controller and the impedance measurer 307, so as to monitor the temperature of the overheat detection line 1 and detect its impedance. The impedance detection device 300 also includes a power supply 318 for supplying power to the controller and the impedance measurer 307 and each clamping device.

[0142] The above features of the impedance detection device 300 are the same or substantially the same as the corresponding features of the impedance detection device 200, and can be further described with reference to the above description of the corresponding features of the impedance detection device 200. The difference from the impedance detection device 200 is that a spring 315 is arranged between the first clamping member 311 and the second clamping member 312, and the spring 315 is configured to bias the clamping device 301 in its closed state, thereby improving the stability of the clamping operation.

[0143] The operation method of the impedance detection device 300 is similar to the operation method of the impedance detection device 100 or 200 .

[0144] The impedance detection device and the method can effectively determine the filling status of the thermosensitive material of the overheat detection line, avoid incomplete filling failures, and improve the safety of aircraft operation. Compared with the hot air gun method of the prior art, the impedance detection device according to the utility model can directly contact the overheat detection line by clamping, which improves the operational stability and heating efficiency; the heat storage and heat preservation components can reduce the risk of burns to the user while reducing heat loss and improving heating efficiency; the integrated design makes the impedance detection device portable and can be used in narrow onboard space.

[0145] In this document, the terms "include", "comprises" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, structure or device that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, structure or device. In the absence of more restrictions, the elements defined by the sentence "includes..." do not exclude the presence of other identical elements in the process, method, structure or device that includes the elements.

[0146] The description of the present invention is given for the purpose of illustration and description, and is not intended to be exhaustive or to limit the present invention to the disclosed form. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific uses.

Claims

1. An impedance detection device, the impedance detection device is used to detect the impedance of an overheat detection line on an aircraft, the impedance detection device comprises a connector for connecting the overheat detection line, a heating element for heating the overheat detection line, a controller and an impedance measurer connected to the connector, and a power supply for supplying power to the impedance detection device. It is characterized in that The impedance detection device further includes a clamping device, the heating element is disposed on the clamping device, and the clamping device is configured to clamp the overheat detection wire and heat the overheat detection wire through the heating element.

2. The impedance detection device according to claim 1, characterized in that: The clamping device includes two clamping members, each of which includes a clamping section and an operating section. The clamping section is configured to clamp the overheat detection wire inside the clamping section, and the heating element is arranged on the inner side of the clamping section of at least one of the clamping members.

3. The impedance detection device according to claim 2, characterized in that: A hinge portion is provided between the clamping sections and the operating section of the two clamping members, and the operating section extends at an angle relative to the clamping section. The two clamping members are hinged to each other at the hinge portion.

4. The impedance detection device according to claim 2 or 3, characterized in that: A heat storage member configured to store heat is also included, the heat storage member is disposed on the inner side of the clamping section, and the heat storage member includes a clamping surface and a side surface that contacts the overheat detection line.

5. The impedance detection device according to claim 4, characterized in that: The heating element is arranged in the heat storage element.

6. The impedance detection device according to claim 5, characterized in that: The clamping surface of the heat storage member is configured with a groove for accommodating the overheat detection wire.

7. The impedance detection device according to claim 5, characterized in that: A heat preservation layer is provided on the clamping surface of the heat storage member.

8. The impedance detection device according to claim 7, characterized in that: The heat-insulating layer on the clamping surface of the heat storage member is configured with a groove for accommodating the overheat detection wire.

9. The impedance detection device according to claim 4, characterized in that: A heat preservation layer is provided on the side surface of the heat storage element.

10. The impedance detection device according to claim 9, characterized in that: A temperature sensor is also included.

11. The impedance detection device according to claim 10, characterized in that: The clamping device is connected to the controller and the impedance meter through an operating cable.

12. The impedance detection device according to claim 11, characterized in that: The controller and the impedance detector are integrally constructed.

13. The impedance detection device according to claim 12, characterized in that: One or more springs are disposed between the two clamping members, and the one or more springs are configured to bias the clamping device in a closed state.

14. The impedance detection device according to claim 13, characterized in that: The one or more springs are configured to electrically connect the clamping sections of the two clamping members, and the controller and the impedance measurer are coupled to at least one of the two clamping members through the operating cable.

Images