Radiation immunity testing device for fire alarm terminal

Abstract

The utility model relates to a radiation immunity testing device for a fire alarm terminal, which comprises a mounting rack, and two vertical rods and a first testing support are arranged on the mounting rack. The first test bracket comprises two first connecting rods and a to-be-tested sample fixing piece; the two sides of the to-be-tested sample fixing piece are respectively matched and axially and rotationally connected with the two first connecting rods; the first test support further comprises a first locking piece. The first locking piece has a locking state for fixedly connecting the to-be-tested sample fixing piece and the first connecting rod, and an unlocking state for releasing the fixing state of the to-be-tested sample fixing piece and the first connecting rod and enabling the to-be-tested sample fixing piece to rotate relative to the first connecting rod. The fire alarm terminal radiation immunity testing device is simple in structure, four surfaces of a to-be-tested sample can be conveniently tested one by one in the follow-up process through the device, the to-be-tested sample does not need to be disassembled and assembled repeatedly in the process of testing the same to-be-tested sample, and the testing efficiency is improved. Therefore, the test problem of different surfaces of the terminal during the radiation immunity test can be solved, and the test efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of test equipment, and more specifically, to a radiation immunity test device for a fire alarm terminal. Background Art

[0002] According to the standard requirements of GB / T 17626.3-2016 "Electromagnetic compatibility - Testing and measurement techniques - Radiated immunity test", the specific content is as follows:

[0003] 7. Test arrangement: All tests on the EUT (Equipment Under Test) should be carried out under conditions as close as possible to the actual installation configuration.

[0004] 7.1 Arrangement of desktop equipment: The EUT (Equipment Under Test) should be placed on an insulating test bench with a height of 0.8 m; connect the power supply and signal lines according to the relevant installation instructions of the equipment.

[0005] 8.2 Implementation of the test: Place the EUT (Equipment Under Test) in a position where one of its surfaces coincides with the calibrated plane. This surface of the EUT is covered by the UFA, unless the partial irradiation method is applied. GB 17626.3-2016 6.2 describes the use of field calibration and partial calibration.

[0006] The transmitting antenna should conduct tests on the four sides of the EUT (Equipment Under Test) one by one. When the EUT can be placed and used in different directions (such as vertical or horizontal directions), all sides should be tested. After technical demonstration, some EUTs (Equipment Under Test) in the laboratory can use fewer sides facing the transmitting antenna. In other cases, for example, according to the type and size of the EUT (Equipment Under Test) or the test frequency, at least four directions should be tested and irradiated; the above content is part of the requirements for testing the radiation immunity of desktop equipment in GB / T 17626.3-2016.

[0007] During the actual process of testing the radiation immunity, in order to meet the test requirements in GB / T 17626.3-2016, it is necessary to conduct tests on the four sides of the EUT (Equipment Under Test) one by one; for fire alarm products, such as small terminal products like manual alarm buttons, fire hydrant buttons, smoke detectors, and temperature sensors, since this type of terminal product is generally positioned and fixed on the test equipment through fastening screws or clamping components, each time the product to be tested needs to switch to a different test surface, it is necessary to remove the product to be tested from the test equipment, then manually rotate the EUT (Equipment Under Test) to change the target test surface, and then position and install the EUT (Equipment Under Test) on the test equipment. The operation is cumbersome and the adjustment of the test surface is inconvenient, resulting in low test efficiency. Content of the Utility Model

[0008] The technical problem to be solved by the present utility model is to provide a radiation immunity test device for a fire alarm terminal in view of the above-mentioned defects of the prior art.

[0009] The technical solution adopted by the present utility model to solve its technical problems is: a radiation immunity test device for a fire alarm terminal, including a mounting rack, wherein two vertical rods are provided on the mounting rack; at least one group of first test brackets are transversely arranged between the two vertical rods; the first test bracket includes at least two first connecting rods and a test sample fixing member arranged between the two first connecting rods; both opposite sides of the test sample fixing member are respectively axially rotatably connected with the two first connecting rods through first rotating components; the first test bracket further includes a first locking member; the first locking member has a locking state in which the test sample fixing member is fixedly connected with the first connecting rod, and an unlocking state in which the fixing state of the two is released and the test sample fixing member can rotate relative to the first connecting rod;

[0010] In the radiation immunity test device for a fire alarm terminal of the present utility model, the first test bracket includes a plurality of the test sample fixing members; the plurality of test samples and the plurality of first connecting rods are alternately connected;

[0011] In the radiation immunity test device for a fire alarm terminal of the present utility model, a support rod is provided above or below the first test bracket between the vertical rods; at least one group of second test brackets for placing test samples are vertically arranged between the support rod and the first test bracket;

[0012] In the radiation immunity test device for a fire alarm terminal of the present utility model, the second test bracket includes at least two second connecting rods and the test sample fixing member arranged between the two second connecting rods; both opposite ends of the test sample fixing member are respectively axially rotatably connected with the two second connecting rods through second rotating components; the second test bracket further includes a second locking member; the second locking member has a locking state in which the test sample fixing member is fixedly connected with the second connecting rod, and an unlocking state in which the fixing state of the two is released and the test sample fixing member can rotate relative to the second connecting rod;

[0013] In the radiation immunity test device for a fire alarm terminal of the present utility model, the test sample fixing member includes two support rods respectively fixedly connected to the opposite side surfaces of the test sample; the central axes of the two support rods are on the same straight line;

[0014] For the radiated immunity test device of the fire alarm terminal described in the present utility model, among the support rod and the first connecting rod, a universal ball is fixedly installed on the end face of one of them, and an installation cover body corresponding to the universal ball is provided on the end face of the other; an activity groove for the universal ball to fit is provided on the installation cover body; the universal ball and the installation cover body form the first rotation assembly;

[0015] For the radiated immunity test device of the fire alarm terminal described in the present utility model, an opening extends from the notch of the activity groove to the bottom of the activity groove on the side wall of the installation cover body; an external thread is circumferentially provided on the outer surface of the installation cover body; the first locking member includes a snap ring movably sleeved on the installation cover body; an internal thread for threaded connection with the external thread is provided on the inner side wall of the snap ring; the diameter of one end of the snap ring facing the first connecting rod is larger than the diameter of the end facing the support rod; when the end with a smaller diameter of the snap ring rotates and moves onto the installation cover body, the side wall of the installation cover body is deformed by the extrusion of the snap ring and the universal ball is clamped and fixed in the installation cover body;

[0016] For the radiated immunity test device of the fire alarm terminal described in the present utility model, the vertical rod is a telescopic rod with adjustable height, which includes an inner rod and an outer rod sleeved on the inner rod and slidably connected to the inner rod; the outer rod is fixedly installed on the installation frame; a third locking member for locking and fixing the inner rod on the outer rod is also provided on the outer rod;

[0017] For the radiated immunity test device of the fire alarm terminal described in the present utility model, a plurality of rolling casters for supporting and driving the movement of the installation frame are further provided at the bottom of the installation frame;

[0018] For the radiated immunity test device of the fire alarm terminal described in the present utility model, the rolling caster includes a U-shaped support frame horizontally rotatably connected to the installation frame; the open end of the U-shaped support frame faces downward; a rolling wheel is rotatably connected to the open end of the U-shaped support frame through a rotating shaft; at least a part of the lower end of the rolling wheel protrudes from the open end of the U-shaped support frame.

[0019] The beneficial effects of the present utility model are as follows: The radiation immunity test device for the fire alarm terminal has a simple structure. The sample to be tested is installed on the first test bracket through the sample fixture to be tested. The first locking member is adjusted to the unlocked state so that the sample fixture to be tested can rotate relative to the first connecting rod, and then the first test surface of the sample to be tested is adjusted to face the transmitting antenna end. At this time, the first locking member is adjusted to the locked state to fixedly connect the sample fixture to be tested with the first connecting rod, and the first test can be completed. Then, the fixed state of the first locking member is released, and the sample to be tested is rotated around the first connecting rod as the axis to adjust the second test surface of the sample to be tested to face the transmitting antenna end. At this time, the sample fixture to be tested is fixedly locked with the first connecting rod through the first locking member, and the second test can be completed. By repeating the steps of the second test as described above, the four surfaces of the sample to be tested can be tested one by one. During the test of the same sample to be tested, the problem of testing different surfaces during the radiation immunity test of the terminal can be solved without repeatedly disassembling and assembling the sample to be tested; the operation is simple, and the efficiency of subsequent tests is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will further illustrate the present utility model in conjunction with the drawings and embodiments. The drawings in the following description are only partial embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts:

[0021] Figure 1 is a schematic structural diagram of a radiation immunity test device for a fire alarm terminal according to a preferred embodiment of the present utility model;

[0022] Figure 2 is Figure 1 a three-dimensional exploded view of the connection between the sample fixture 13 to be tested and the first connecting rod 12 in

[0023] Figure 3 is Figure 2 a schematic structural diagram of the first connecting rod 12 in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The terms "first", "second", "third", and "fourth" in the specification, claims, and drawings of the present invention are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or brackets is not limited to the listed steps or brackets, but may optionally further include steps or brackets that are not listed, or may optionally further include other steps or brackets inherent to these processes, methods, products, or devices.

[0025] As used herein, the mention of "embodiment" means that the specific features, structures, or characteristics described in connection with the embodiment may be included in at least one embodiment of the present invention. The phrase appears at various positions in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0026] "A plurality of" means two or more. "And / or" describes the association relationship of associated objects and indicates that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects before and after.

[0027] Moreover, terms indicating directions such as "upper, lower, front, rear, left, right, upper end, lower end, longitudinal" etc. are all referenced based on the attitude position of the device or equipment described in this solution during normal use.

[0028] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the described embodiments are partial embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

[0029] In the present utility model, the fire alarm terminals refer to terminal products such as manual alarm buttons, fire hydrant buttons, smoke sensors, temperature sensors, etc., and the test device in the present utility model is within a standard uniform field area, that is, within 1.5m × 1.5m.

[0030] A radiation immunity test device for a fire alarm terminal according to a preferred embodiment of the present utility model, as Figure 1 shown, includes a mounting frame 10, and two vertical rods 11 are provided on the mounting frame 10; at least one group of first test brackets is horizontally arranged between the two vertical rods 11; in one embodiment, the first test bracket includes two first connecting rods 12 and a test sample fixing member 13 arranged between the two first connecting rods 12; one ends of the two first connecting rods 12 are respectively connected to the two vertical rods, and the other ends of the two first connecting rods 12 are respectively connected to both ends of the test sample fixing member 13. Optionally, in another embodiment, as Figure 1As shown, when there are three or more first connecting rods and two or more test sample fixtures 13, multiple test samples and multiple first connecting rods 12 are connected in an alternating manner; the first connecting rods at the front and rear ends of the first test bracket are respectively connected to the two vertical rods, and the structure is stable; the number of multiple first connecting rods can be increased or decreased according to the volume model of the test sample, and the user can select different first test brackets according to the actual number and model volume of the test sample fixtures 13, so as to realize the radiation immunity test of multiple different models simultaneously and improve the test efficiency. In this embodiment, both opposite sides of the test sample fixture 13 are respectively axially rotatably connected to the two first connecting rods 12 through the first rotating components; the first test bracket further includes a first locking member 14; the first locking member 14 has a locking state in which the test sample fixture is fixedly connected to the first connecting rod 12, and an unlocking state in which the fixed state of the two is released and the test sample fixture can rotate relative to the first connecting rod 12.

[0031] The radiation immunity test device for the fire alarm terminal has a simple structure. The test sample is installed on the first test bracket through the test sample fixture. The first locking member is adjusted to the unlocking state so that the test sample fixture can rotate relative to the first connecting rod, and then the first test surface of the test sample is adjusted to face the transmitting antenna end. At this time, the first locking member is adjusted to the locking state to fixedly connect the test sample fixture and the first connecting rod to complete the first test; then the fixed state of the first locking member is released, and the test sample is rotated around the first connecting rod to adjust the second test surface of the test sample to face the transmitting antenna end. At this time, the test sample fixture and the first connecting rod are fixedly locked through the first locking member to complete the second test. Repeating the steps of the second test above can test the four surfaces of the test sample one by one. During the test of the same test sample, the test sample does not need to be disassembled and assembled repeatedly, and the test problem of different surfaces during the radiation immunity test of the terminal can be solved; the operation is simple, and the efficiency of subsequent tests is further improved.

[0032] In one embodiment, a support rod 15 is provided above or below the first test bracket between the vertical rods 11; the diameter of the support rod 15 is the same as that of the first connecting rod; further, in order to rotate and adjust the test surface of the test sample in multiple directions; at least one group of second test brackets for placing the test sample is vertically provided between the support rod 15 and the first test bracket. Optionally, in another embodiment, two groups of first test brackets are provided; the two groups of first test brackets are arranged in sequence along the length direction of the vertical rod 11; at least one group of second test brackets for placing the test sample is vertically provided between the two groups of first test brackets.

[0033] As Figure 1As shown, in one embodiment, the second test bracket includes two second connecting rods 16 and a test sample fixing member 13 disposed between the two second connecting rods 16. One ends of the two second connecting rods 16 are respectively connected to one side surface of the first connecting rod 12 and one side surface of the connecting rod 15, and the other ends of the two second connecting rods 16 are respectively connected to two ends of the test sample fixing member 13. Optionally, in another embodiment, when there are three or more second connecting rods 16 and two or more test sample fixing members 13, multiple test samples and multiple second connecting rods 16 are connected in an alternating manner. The second connecting rods 16 at the front and rear ends of the second test bracket are respectively connected to the first connecting rod 12 and the support rod 15, with stable structure. The number of the multiple second connecting rods can be increased or decreased according to the volume model of the test sample. The user can select different second test brackets according to the actual number and model volume of the test sample fixing members 13, so as to simultaneously perform radiation immunity tests on multiple different models, improving the test efficiency.

[0034] Similarly, the same as the principle of the first locking member, opposite ends of the test sample fixing member 13 are respectively axially rotatably connected to the two second connecting rods 16 through second rotating components. The second test bracket further includes a second locking member 17. The second locking member 17 has a locking state for fixedly connecting the test sample fixing member and the second connecting rod 16, and an unlocking state for releasing the fixed state of the two to enable the test sample fixing member to rotate relative to the second connecting rod 16.

[0035] In one embodiment, the test sample fixing member 13 includes two support rods 131 respectively fixedly connected to opposite side surfaces of the test sample. The central axes of the two support rods 131 are on the same straight line. It should be noted that the distance between the two support rods 131 can be adjusted according to the volume model of the actual test sample. In this embodiment, the bracket can be fixedly connected to the outer surface of the test sample through glue or by means of threaded connection, so that the two support rods and the test sample form an integral body, with stable structure and facilitating subsequent adjustment of the test surface of the test sample.

[0036] Such as Figure 2-3As shown, in one embodiment, a universal ball 132 is fixedly installed on the end face of the support rod 132 facing the first connecting rod 12, and an installation cover body 121 corresponding to the universal ball 132 is provided on the end face of the first connecting rod 12; the diameter of the universal ball 132 is not less than the diameter of the support rod 132; an activity groove 122 for the universal ball 132 to fit is provided on the installation cover body 121; the universal ball 132 and the installation cover body 121 form a first rotation assembly; when the first locking member is in the unlocked state, the universal ball 132 can rotate in the activity groove 122 in the installation cover body 121, and the rotation is flexible; optionally, the universal ball 132 can also be arranged on the end face of one end of the first connecting rod facing the support rod, and the installation cover body 121 is installed on the support rod. The above simple position replacements all belong to the protection scope of the present utility model.

[0037] Optionally, the second rotation assembly can also adopt the same structure as the first rotation assembly, which will not be elaborated here.

[0038] Furthermore, the side wall of the installation cover body 121 extends an opening 123 from the notch of the activity groove 122 towards the bottom of the activity groove 122; the opening 123 is communicated with the activity groove 122; the installation cover body 121 is made of plastic or metal material with a certain elastic force; an external thread is circumferentially arranged on the outer surface of the installation cover body 121; the first locking member 14 includes a snap ring movably sleeved on the installation cover body 121; an internal thread matched with the external thread is provided on the inner side wall of the snap ring; the diameter of the end of the snap ring facing the first connecting rod 12 is larger than the diameter of the end facing the support rod 132; based on the principle of screw connection, when the end with a small diameter of the snap ring rotates and moves onto the installation cover body 121, the side wall of the installation cover body 121 is deformed by the extrusion of the snap ring and clamps and fixes the universal ball 132 in the installation cover body 121. On the contrary, when the end with a small diameter of the snap ring rotates outwards away from the notch of the activity groove 122, the side wall of the installation cover body 121 loses the extrusion of the snap ring and automatically resets, and the universal ball can rotate at any angle in the activity groove, and the operation is simple.

[0039] In this embodiment, as Figure 1As shown, the vertical rod 11 is a telescopic rod with adjustable height, which includes an inner rod 111 and an outer rod 112 sleeved on the inner rod 111 and slidably connected to the inner rod 111; the outer rod 112 is fixedly installed on the mounting frame 10; a third locking member 113 for locking and fixing the inner rod 111 on the outer rod 112 is further provided on the outer rod 112; the third locking member 113 can adopt a locking structure in the prior art, such as the most common locking screw or locking thread ring structure in the fan telescopic rod structure, which will not be elaborated here. Adjust the height of the telescopic rod according to the GB / T17626.3-2016 standard to ensure that the lower surface of the lowest test sample is not less than 0.8 meters from the ground, and the lower surface of the uppermost test sample is not more than 2.3 meters from the ground, that is, the distance between the test sample on the bottom mounting plate and the test sample on the top mounting plate does not exceed 1.5m, so as to ensure more accurate test results.

[0040] Further, positioning holes 114 for mating and plugging with the first connecting rod 12 are symmetrically arranged on the opposite two side surfaces of the two inner rods 111; a plurality of positioning holes 114 are arranged in sequence along the length direction of the inner rod 111; the first test bracket can adjust its height on the vertical rod according to the usage situation, which is flexible and convenient to use.

[0041] Further, in order to facilitate moving the test device to the site of the radio frequency electromagnetic field radiation immunity test and making the test sample adjusted within the uniform field area, which is convenient for subsequent radio frequency electromagnetic field radiation immunity tests. A plurality of rolling casters 18 for supporting and driving the mounting frame 10 to move are further provided at the bottom of the mounting frame 10; in one embodiment, the rolling caster 18 includes a U-shaped support frame 181 horizontally rotatably connected to the mounting frame 10; the open end of the U-shaped support frame 181 faces downward; a rolling wheel 183 is rotatably connected to the open end of the U-shaped support frame 181 through a rotating shaft 182; at least a part of the lower end of the rolling wheel 183 protrudes from the open end of the U-shaped support frame 181, and the structure is simple; optionally, the rolling caster can also be a universal caster or other caster structures in the prior art, which will not be elaborated here.

[0042] It should be noted that the present utility model only improves the relevant structure of the mounting frame in the test device, and the subsequent test principle or specific test process involved in this test device are all completed by using the prior art, which will not be described in detail here.

[0043] It should be understood that for those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present utility model.

Claims

1. A radiation immunity test device for a fire alarm terminal, comprising a mounting bracket, characterized in that, There are two vertical rods provided on the mounting bracket; at least one set of first test brackets is transversely arranged between the two vertical rods; the first test bracket includes at least two first connecting rods and a test sample fixing member arranged between the two first connecting rods; both opposite sides of the test sample fixing member are respectively axially rotatably connected with the two first connecting rods through first rotating components; the first test bracket further includes a first locking member; the first locking member has a locking state for fixedly connecting the test sample fixing member and the first connecting rod, and an unlocking state for releasing the fixed state of the two and enabling the test sample fixing member to rotate relative to the first connecting rod.

2. The radiation immunity test device for a fire alarm terminal according to claim 1, wherein The first test bracket includes a plurality of the test sample fixing members; the plurality of test samples and the plurality of first connecting rods are alternately connected.

3. The fire alarm terminal radiation immunity test device according to claim 1 or 2, characterized in that, A support rod is provided above or below the first test bracket between the vertical rods; at least one set of second test brackets for placing test samples is vertically arranged between the support rod and the first test bracket.

4. The radiation immunity test device for a fire alarm terminal according to claim 3, characterized in that, The second test bracket includes at least two second connecting rods and the test sample fixing member arranged between the two second connecting rods; both opposite ends of the test sample fixing member are respectively axially rotatably connected with the two second connecting rods through second rotating components; the second test bracket further includes a second locking member; the second locking member has a locking state for fixedly connecting the test sample fixing member and the second connecting rod, and an unlocking state for releasing the fixed state of the two and enabling the test sample fixing member to rotate relative to the second connecting rod.

5. The radiation immunity test device for a fire alarm terminal according to claim 1, characterized in that The test sample fixing member includes two support rods respectively fixedly connected to the opposite side surfaces of the test sample; the central axes of the two support rods are on the same straight line.

6. The radiation immunity test device for a fire alarm terminal according to claim 5, characterized in that, Among the support rod and the first connecting rod, a universal ball is fixedly installed on the end surface of one of them, and an installation cover body corresponding to the universal ball is provided on the end surface of the other; an activity groove for adapting the universal ball is provided on the installation cover body; the universal ball and the installation cover body form the first rotating component.

7. The fire alarm terminal radiated immunity test device according to claim 6, characterized in that An opening extends from the notch of the activity groove to the bottom of the activity groove on the side wall of the installation cover body; an external thread is circumferentially arranged on the outer surface of the installation cover body; the first locking member includes a snap ring movably sleeved on the installation cover body; an internal thread matched with the external thread is provided on the inner side wall of the snap ring; the caliber of the end of the snap ring facing the first connecting rod is larger than the caliber of the end facing the support rod; when the end with a smaller caliber of the snap ring rotates and moves onto the installation cover body, the side wall of the installation cover body is deformed by the extrusion of the snap ring and clamps and fixes the universal ball in the installation cover body.

8. The radiation immunity test device for the fire alarm terminal according to claim 1, characterized in that, The vertical rod is a telescopic rod with adjustable height, which includes an inner rod and an outer rod sleeved on the inner rod and slidably connected with the inner rod; the outer rod is fixedly installed on the mounting bracket; a third locking member for locking and fixing the inner rod on the outer rod is further provided on the outer rod.

9. The radiated immunity test device for a fire alarm terminal according to claim 1, characterized in that, A plurality of rolling casters for supporting and driving the movement of the mounting bracket are further provided at the bottom of the mounting bracket.

10. The fire alarm terminal radiation immunity test device according to claim 9, characterized in that, The rolling caster includes a U-shaped support frame horizontally rotatably connected to the mounting frame; the open end of the U-shaped support frame faces downward; a rolling wheel is rotatably connected to the open end of the U-shaped support frame through a rotating shaft; at least a part of the lower end of the rolling wheel protrudes from the open end of the U-shaped support frame.

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