CN112526325B - Multifunctional signal processing board low-temperature damp-heat vibration comprehensive experiment box - Google Patents
Multifunctional signal processing board low-temperature damp-heat vibration comprehensive experiment box Download PDFInfo
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- CN112526325B CN112526325B CN202011537691.0A CN202011537691A CN112526325B CN 112526325 B CN112526325 B CN 112526325B CN 202011537691 A CN202011537691 A CN 202011537691A CN 112526325 B CN112526325 B CN 112526325B
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2832—Specific tests of electronic circuits not provided for elsewhere
- G01R31/2836—Fault-finding or characterising
- G01R31/2849—Environmental or reliability testing, e.g. burn-in or validation tests
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Abstract
The invention discloses a multifunctional signal processing board low-temperature damp-heat vibration comprehensive experiment box, wherein a temperature and humidity control air pump unit controls the humidity and temperature of air supplied by a temperature and humidity control air flow supply pipe, and the air flow sprayed by a temperature and humidity control air flow spraying mechanism can act on a signal processing board on a comprehensive vibration platform; the direction and the angle of the air flow sprayed out by each temperature and humidity control air flow spraying mechanism can be independently controlled, so that the temperature and humidity in the outer box shell and the acting force condition of the air flow on the signal processing board can be regulated by controlling the air flow sprayed out by each temperature and humidity control air flow spraying mechanism, various stress, vibration and experiment under the temperature and humidity can be realized, the experiment of the adaptability of the signal circuit board in various environments and even abrupt change environments is improved, the real simulation of the signal circuit board to actual use is improved, and the signal circuit board can be ensured to have enough experiment before mass production.
Description
Technical Field
The invention particularly relates to a multifunctional signal processing board low-temperature damp-heat vibration comprehensive experiment box, and relates to the field of low-temperature damp-heat vibration.
Background
At present, for related equipment used in low-temperature vibration occasions, corresponding low-temperature vibration experiments are required to be carried out on the signal circuit board inside the related equipment before large-scale production after design is carried out on the related equipment, so that the service life of the signal circuit board is ensured, and the working reliability of the signal circuit board is ensured. In this regard, a special comprehensive experiment box is required to perform vibration experiments on the signal processing board at a certain temperature and humidity. However, for some devices used under the conditions of vibration, humidity and the like, the conditions of vibration, temperature and humidity, airflow and other acting forces of the devices in actual use are changeable, and in an experimental state, certain rules are often caused by the factors in the experimental box, however, the problems that the conditions of the regular vibration, temperature and humidity, airflow and other acting forces are changeable in actual use are difficult to realize, the experimental conditions are greatly different from the actual use conditions, the service performance and service life of the subsequent signal circuit board are affected, and even the first-time devices produced are difficult to reliably use, and resources are wasted.
Disclosure of Invention
Therefore, in order to solve the defects, the invention provides the multifunctional signal processing board low-temperature damp-heat vibration comprehensive experiment box.
The invention is realized by constructing a multifunctional signal processing board low-temperature damp-heat vibration comprehensive experiment box, which comprises a fixed base, a transverse vibration mechanism, a transverse vibration platform, a longitudinal vibration mechanism, a comprehensive vibration platform, a temperature and humidity control air flow supply pipe, a temperature and humidity control air flow ejection mechanism and an outer box shell, wherein the transverse vibration mechanism is arranged at the upper end of the fixed base, the transverse vibration platform is arranged at the top of the transverse vibration mechanism, the comprehensive vibration platform is arranged at the top of the transverse vibration platform in a supporting connection manner by adopting the longitudinal vibration mechanism, the outer box shell which extends upwards is arranged on the fixed base, the transverse vibration mechanism, the transverse vibration platform, the longitudinal vibration mechanism and the comprehensive vibration platform in an encircling manner, and the multifunctional signal processing board is characterized in that a plurality of groups of temperature and humidity control air flow ejection mechanisms are arranged on the periphery side array of the comprehensive vibration platform, the temperature and humidity control air flow ejection mechanism is connected with the temperature and humidity control air flow supply pipe, the temperature and humidity control air flow control air pump unit is connected with the temperature and humidity control air pump unit so that the temperature and humidity of air supplied by the temperature and humidity control air flow supply pipe by the temperature control air pump unit can act on the comprehensive vibration board; the direction and the angle of the air flow sprayed by each temperature and humidity control air flow spraying mechanism can be independently controlled, so that the temperature and humidity in the outer box shell and the acting force condition of the air flow on the signal processing board can be adjusted by controlling the air flow sprayed by each temperature and humidity control air flow spraying mechanism.
Further, as the preference, rag bolt is adopted to fix in the relevant position to unable adjustment base's bottom, transverse vibration mechanism includes transverse vibration slider and transverse vibration driver, transverse vibration slider's bottom slidable cooperate in unable adjustment base is last, transverse vibration platform fixes at transverse vibration slider's top, transverse vibration slider's one side is connected transverse vibration driver's output, transverse vibration driver fixes on unable adjustment base, transverse vibration driver's vibration amplitude, the equal adjustable setting of vibration frequency.
Further, preferably, the longitudinal vibration mechanism is a longitudinal vibration driver, the vibration amplitude and the vibration frequency of the longitudinal vibration driver in the vertical direction are both adjustable, the top of the longitudinal vibration mechanism is hinged to the middle of the bottom of the comprehensive vibration platform, and two auxiliary vibration drivers are further hinged between the periphery of the top of the transverse vibration platform and the periphery of the bottom of the comprehensive vibration platform.
Further, preferably, at least one of the auxiliary vibration drivers is provided with a telescopic auxiliary mechanism at an upper end or a lower end thereof so as to provide a vibration movement space for the longitudinal vibration mechanism and the auxiliary vibration drivers, and the auxiliary vibration drivers are provided with adjustable vibration amplitudes and vibration frequencies.
Further, preferably, the integrated vibration platform is provided with a plurality of positioning pins and fixing pins, and the positioning pins and the fixing pins are used for fixedly locking the signal processing board to be tested.
Further, as the preference, temperature and humidity control air current blowout mechanism includes the dustcoat body, internal fixation piece, side link, elastic cover piece, first air current grid, second air current grid, grid high frequency adjustment mechanism, wherein, be provided with the through-hole on the dustcoat body, temperature and humidity control air current supply tube's tip passes the through-hole sets up, the internal side of dustcoat is fixed to be provided with the internal fixation piece, the both sides of internal fixation piece are provided with relative interval arrangement the side link, two be provided with between the tip of side link elastic cover piece, be provided with in the space that elastic cover piece, side link enclose articulated in first air current grid and second air current grid on the side link, interval symmetry between first air current grid, the second air current grid is arranged side by side, still be provided with on the internal fixation piece grid high frequency adjustment mechanism, grid high frequency adjustment mechanism's lower extreme is connected with two rows of articulated bars, every row of articulated bars with first air current grid and second air current grid and the corresponding to each other articulated grid of second air current grid and the articulated grid of second air current grid on the first air current grid, each other articulated grid of the articulated grid of second air current grid.
Further, preferably, the hinge strips are arranged in a telescopic adjustment manner, so that the condition of the air flow ejected by the first air flow grating and the second air flow grating can be adjusted, and the air flow can be controlled to be ejected irregularly to the signal processing board in the experimental process.
Further, as an preference, the grid high-frequency adjustment mechanism includes first connecting rod, second connecting rod, third connecting rod, fourth connecting rod, high-frequency adjustable range expansion device and middle connecting rod, wherein, the upper end of second connecting rod, third connecting rod articulates together and all articulates on the internal fixation piece, the lower extreme of second connecting rod with the upper end of first connecting rod articulates, the lower extreme of third connecting rod with the upper end of fourth connecting rod articulates, the lower extreme of first connecting rod with the lower extreme of fourth connecting rod articulates each other and all articulates on the drive block, the top of two rows of articulated bars is connected the bottom side of drive block, the articulated department between third connecting rod, the fourth connecting rod articulates and is provided with high-frequency adjustable range expansion device, the output of high-frequency adjustable range expansion device is connected the middle connecting rod, the tip of middle connecting rod articulates in the articulated department between first connecting rod and the second connecting rod.
Further, preferably, a sliding block is arranged on the side wall of the driving block, a vertical sliding groove is arranged on the side connecting frame, and the sliding block is in sliding fit with the vertical sliding groove.
Further, as the preference, the dustcoat body include the cuboid section and with the cuboid section is connected the combination section as an organic whole, be provided with cuboid cavity in the cuboid section, be provided with trapezoidal cavity and cuboid cavity of intercommunication each other in the combination section, cuboid cavity of cuboid section with trapezoidal cavity intercommunication, interior fixed block, side link, elastic cover piece, first air current grid, second air current grid, grid high frequency adjustment mechanism are located cuboid cavity of cuboid section the cuboid cavity of trapezoid cavity and combination section.
The invention has the following advantages: the multifunctional signal processing board low-temperature damp-heat vibration comprehensive experiment box provided by the invention has the following advantages compared with the same type of equipment:
(1) The temperature and humidity control air pump unit of the multifunctional signal processing board low-temperature damp-heat vibration comprehensive experiment box controls the humidity and temperature of air flow supplied by the temperature and humidity control air flow supply pipe, and the air flow sprayed by the temperature and humidity control air flow spraying mechanism can act on the signal processing board on the comprehensive vibration platform; the direction and the angle of the air flow sprayed by each temperature and humidity control air flow spraying mechanism can be independently controlled, so that the temperature and humidity in the outer box shell and the acting force condition of the air flow on the signal processing board can be regulated by controlling the air flow sprayed by each temperature and humidity control air flow spraying mechanism, various stress, vibration and experiment under the temperature and humidity can be realized, the experiment of the adaptability of the signal circuit board in various environments and even abrupt change environments is improved, the actual simulation of the signal circuit board to actual use is improved, and the signal circuit board can be ensured to have enough experiment before mass production;
(2) The lower end of the grid high-frequency adjusting mechanism is connected with two rows of hinge strips, each row of hinge strips corresponds to the first airflow grid and the second airflow grid, the lower end of each row of hinge strips is hinged to the grids of the first airflow grid and the second airflow grid, and the grids on the first airflow grid and the second airflow grid are hinged to the hinge shafts independently, so that the experimental capability is effectively improved.
Drawings
FIG. 1 is a schematic diagram of the front view of the present invention;
FIG. 2 is a schematic side elevational view of the present invention;
FIG. 3 is a schematic diagram of an explosion separation structure of the temperature and humidity control air flow spraying mechanism of the invention;
fig. 4 is a schematic front view of the temperature and humidity control air flow spraying mechanism according to the present invention.
Detailed Description
The following detailed description of the present invention, taken in conjunction with fig. 1-4, clearly and completely describes the technical solutions of embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a multifunctional signal processing board low-temperature damp-heat vibration comprehensive experiment box through improvement, which comprises a fixed base 1, a transverse vibration mechanism 2, a transverse vibration platform 4, a longitudinal vibration mechanism 5, a comprehensive vibration platform 7, a temperature and humidity control air flow supply pipe 10, a temperature and humidity control air flow spraying mechanism 8 and an outer box shell 11, wherein the upper end of the fixed base is provided with the transverse vibration mechanism, the top of the transverse vibration mechanism is provided with the transverse vibration platform, the top of the transverse vibration platform is supported and connected with the comprehensive vibration platform by adopting the longitudinal vibration mechanism, the fixed base 1, the transverse vibration mechanism 2, the transverse vibration platform 4, the longitudinal vibration mechanism 5 and the comprehensive vibration platform 7 are surrounded with the outer box shell extending upwards, and the multifunctional signal processing board low-temperature damp-heat vibration experiment box is characterized in that the temperature and humidity control air flow spraying mechanism 8 is connected with the temperature and humidity control air flow supply pipe 10, the temperature and humidity control air flow supply pipe 10 is connected with a temperature and humidity control air pump set so that the temperature and humidity control air flow supplied by the temperature and humidity control air pump mechanism 10 can act on the comprehensive vibration platform 7; the direction and angle of the air flow sprayed by each temperature and humidity control air flow spraying mechanism 8 can be independently controlled, so that the temperature and humidity in the outer box shell and the acting force condition of the air flow on the signal processing board can be adjusted by controlling the air flow sprayed by each temperature and humidity control air flow spraying mechanism 8.
The bottom of unable adjustment base adopts rag bolt to fix in relevant position, horizontal vibration mechanism 2 includes horizontal vibration slider 2 and horizontal vibration driver 3, horizontal vibration slider's bottom slidable cooperate in on the unable adjustment base, horizontal vibration platform fixes at horizontal vibration slider's top, horizontal vibration slider's one side is connected horizontal vibration driver's output, horizontal vibration driver fixes on the unable adjustment base, horizontal vibration driver's vibration amplitude, the equal adjustable setting of vibration frequency.
The vertical vibration mechanism 5 is a vertical vibration driver, the vibration amplitude and the vibration frequency of the vertical vibration driver in the vertical direction are all adjustable, the top of the vertical vibration mechanism is hinged with the middle of the bottom of the comprehensive vibration platform, and two auxiliary vibration drivers 6 are further hinged between the periphery of the top of the transverse vibration platform 4 and the periphery of the bottom of the comprehensive vibration platform.
At least one of the auxiliary vibration drivers 6 is provided with a telescopic auxiliary mechanism at its upper or lower end to provide a vibration movement space for the longitudinal vibration mechanism and the auxiliary vibration drivers, and the auxiliary vibration drivers 6 are provided with an adjustable vibration amplitude and frequency.
The comprehensive vibration platform is provided with a plurality of positioning pins 9 and fixing pins, and the positioning pins and the fixing pins are used for fixedly locking the signal processing board to be tested.
The temperature and humidity control airflow spraying mechanism 8 comprises an outer cover body, an inner fixing block 19, side connecting frames 29, elastic cover pieces 30, a first airflow grille 13, a second airflow grille 12 and a grille high-frequency adjusting mechanism, wherein through holes 23 are formed in the outer cover body, the end portions of temperature and humidity control airflow supply pipes 10 penetrate through the through holes, the inner side of the outer cover body is fixedly provided with the inner fixing block, two sides of the inner fixing block are provided with the side connecting frames which are oppositely arranged at intervals, the elastic cover pieces are arranged between the end portions of the side connecting frames, the space surrounded by the elastic cover pieces and the side connecting frames is internally provided with the first airflow grille 13 and the second airflow grille 12 hinged to an hinging shaft 27 on the side connecting frames, the first airflow grille 13 and the second airflow grille 12 are symmetrically arranged side by side, the inner fixing block is also provided with the grille high-frequency adjusting mechanism, the lower end of the grille high-frequency adjusting mechanism is connected with two rows of hinging strips, and each row of hinging strips is hinged to the first airflow grille 13 and the second airflow grille 12 are hinged to the first airflow grille 13 and the second airflow grille 12 which are hinged to the first airflow grille 13 and the second airflow grille 12 respectively.
The hinge strips are in telescopic adjustment, so that the conditions of the air flows sprayed out of the first air flow grating 13 and the second air flow grating 12 can be adjusted, and the air flows can be controlled to be sprayed out irregularly to the signal processing board in the experimental process.
The grid high-frequency adjusting mechanism comprises a first connecting rod 14, a second connecting rod 17, a third connecting rod 25, a fourth connecting rod 26, a high-frequency adjustable amplitude telescopic device 21 and an intermediate connecting rod 15, wherein the upper ends of the second connecting rod 17 and the third connecting rod 25 are hinged together and all hinged to the inner fixed block, the lower end of the second connecting rod is hinged to the upper end of the first connecting rod, the lower end of the third connecting rod is hinged to the upper end of the fourth connecting rod, the lower ends of the first connecting rod and the lower ends of the fourth connecting rod are hinged to each other and all hinged to the driving block, the tops of the two rows of hinged bars are connected to the bottom side of the driving block, the hinged positions between the third connecting rod 25 and the fourth connecting rod 26 are hinged to the high-frequency adjustable amplitude telescopic device 21, the output end of the high-frequency adjustable amplitude telescopic device 21 is connected to the intermediate connecting rod, and the end of the intermediate connecting rod is hinged to the hinged position between the first connecting rod and the second connecting rod.
The side wall of the driving block is provided with a sliding block 20, the side connecting frame is provided with a vertical sliding groove 31, and the sliding block is in sliding fit with the vertical sliding groove.
The outer cover body comprises a cuboid section 24 and a combined section connected with the cuboid section as a whole, a cuboid cavity is formed in the cuboid section, a trapezoid cavity and a cuboid cavity which are mutually communicated are formed in the combined section, the cuboid cavity of the cuboid section is communicated with the trapezoid cavity, and the inner fixing block 19, the side connecting frame 29, the elastic cover piece 30, the first airflow grille 13, the second airflow grille 12 and the grille high-frequency adjusting mechanism are located in the cuboid cavity of the cuboid section and the cuboid cavity of the combined section.
The basic principle and main characteristics of the invention and the advantages of the invention are shown and described above, standard parts used by the invention can be purchased from market, special-shaped parts can be customized according to the description of the specification and the drawings, the specific connection modes of the parts adopt conventional means such as mature bolt rivets and welding in the prior art, the machinery, the parts and the equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection modes in the prior art, so that the description is omitted.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. The utility model provides a multi-functional signal processing board low temperature damp and hot vibration comprehensive experiment case, it includes unable adjustment base (1), horizontal vibration mechanism (2), horizontal vibration platform (4), vertical vibration mechanism (5), comprehensive vibration platform (7), temperature and humidity control air current supply pipe (10), temperature and humidity control air current blowout mechanism (8) and outer case (11), wherein, unable adjustment base's upper end is provided with horizontal vibration mechanism, horizontal vibration mechanism's top is provided with horizontal vibration platform, horizontal vibration platform's top adopts vertical vibration mechanism support connection is provided with comprehensive vibration platform, unable adjustment base (1), horizontal vibration mechanism (2), horizontal vibration platform (4), vertical vibration mechanism (5), comprehensive vibration platform (7) are gone up to enclose and are equipped with upwards extending outer case shell, its characterized in that, comprehensive vibration platform's all around side array is provided with multiunit temperature and humidity control air current blowout mechanism (8), be connected with on temperature and humidity control air current blowout mechanism (8) temperature and humidity control air current supply pipe (10), temperature and humidity control air current supply pipe (10) are connected with temperature and humidity control air pump so that temperature and humidity control air current supply unit (10), the sprayed air flow of the temperature and humidity control air flow spraying mechanism (8) can act on a signal processing board on the comprehensive vibration platform (7); the direction and the angle of the air flow sprayed by each temperature and humidity control air flow spraying mechanism (8) can be independently controlled, so that the temperature and humidity in the outer box shell and the acting force condition of the air flow on the signal processing board can be adjusted by controlling the air flow sprayed by each temperature and humidity control air flow spraying mechanism (8);
the temperature and humidity control airflow spraying mechanism (8) comprises an outer cover body, an inner fixing block (19), side connecting frames (29), elastic cover plates (30), a first airflow grille (13), a second airflow grille (12) and a grille high-frequency adjusting mechanism, wherein a through hole (23) is formed in the outer cover body, the end part of a temperature and humidity control airflow supply pipe (10) penetrates through the through hole, the inner fixing block is fixedly arranged on the inner side of the outer cover body, the side connecting frames which are oppositely arranged at intervals are arranged on two sides of the inner fixing block, the elastic cover plates are arranged between the end parts of the two side connecting frames, the space surrounded by the elastic cover plates and the side connecting frames is internally provided with the first airflow grille (13) and the second airflow grille (12) which are hinged to a hinge shaft (27) on the side connecting frames, the first airflow grille (13) and the second airflow grille (12) are symmetrically arranged at intervals side by side, the grille high-by-side adjusting mechanism is further arranged on the inner fixing block, the high-frequency grille adjusting mechanism is connected with the upper airflow grille (12) and the lower airflow grille (12) at intervals, the lower end of each airflow grille is hinged with the corresponding to the first airflow grille (13) and the second airflow grille (13) at the upper end (12), each grid (28) on the first airflow grid (13) and the second airflow grid (12) are hinged on the hinge shaft (27) independently.
2. The multifunctional signal processing board low-temperature damp-heat vibration comprehensive experiment box according to claim 1, wherein: the bottom of unable adjustment base adopts rag bolt to fix in relevant position, transverse vibration mechanism (2) are including transverse vibration slider and transverse vibration driver (3), transverse vibration slider's bottom slidable cooperate in unable adjustment base is last, transverse vibration platform fixes at transverse vibration slider's top, transverse vibration slider's one side is connected transverse vibration driver's output, transverse vibration driver fixes on unable adjustment base, transverse vibration driver's vibration amplitude, the equal adjustable setting of vibration frequency.
3. The multifunctional signal processing board low-temperature damp-heat vibration comprehensive experiment box according to claim 2, wherein: the vertical vibration mechanism (5) is a vertical vibration driver, the vibration amplitude and the vibration frequency of the vertical vibration driver in the vertical direction are all adjustable, the top of the vertical vibration mechanism is hinged with the middle of the bottom of the comprehensive vibration platform, and two auxiliary vibration drivers (6) are further hinged between the periphery of the top of the transverse vibration platform (4) and the periphery of the bottom of the comprehensive vibration platform.
4. A multifunctional signal processing board low-temperature damp-heat vibration comprehensive experiment box according to claim 3, which is characterized in that: at least one of the auxiliary vibration drivers (6) is provided with a telescopic auxiliary mechanism at the upper end or the lower end so as to provide a vibration movement space for the longitudinal vibration mechanism and the auxiliary vibration drivers, and the vibration amplitude and the vibration frequency of the auxiliary vibration drivers (6) are adjustable.
5. The multifunctional signal processing board low-temperature damp-heat vibration comprehensive experiment box according to claim 4, wherein: the comprehensive vibration platform is provided with a plurality of positioning pins (9) and fixing pins, and the positioning pins and the fixing pins are used for fixedly locking the signal processing board to be tested.
6. The multifunctional signal processing board low-temperature damp-heat vibration comprehensive experiment box according to claim 5, wherein: the hinge strips are arranged in a telescopic adjustment mode so as to adjust the conditions of the ejected air flows of the first air flow grating (13) and the second air flow grating (12) and control the air flows to the irregular ejection of the signal processing board in the experimental process.
7. The multifunctional signal processing board low-temperature damp-heat vibration comprehensive experiment box according to claim 6, wherein: the grid high-frequency adjusting mechanism comprises a first connecting rod (14), a second connecting rod (17), a third connecting rod (25), a fourth connecting rod (26), a high-frequency adjustable amplitude telescopic device (21) and an intermediate connecting rod (15), wherein the upper ends of the second connecting rod (17) and the third connecting rod (25) are hinged together and all hinged to the inner fixed block, the lower end of the second connecting rod is hinged to the upper end of the first connecting rod, the lower end of the third connecting rod is hinged to the upper end of the fourth connecting rod, the lower end of the first connecting rod and the lower end of the fourth connecting rod are hinged to each other and all hinged to the driving block, the tops of the two rows of hinged bars are connected to the bottom side of the driving block, the hinged positions between the third connecting rod (25) and the fourth connecting rod (26) are hinged to the high-frequency adjustable amplitude telescopic device (21), the output end of the high-frequency adjustable amplitude telescopic device (21) is connected to the intermediate connecting rod, and the end of the intermediate connecting rod is hinged to the hinged position between the first connecting rod and the second connecting rod.
8. The multifunctional signal processing board low-temperature damp-heat vibration comprehensive experiment box according to claim 7, wherein: the side wall of the driving block is provided with a sliding block (20), the side connecting frame is provided with a vertical sliding groove (31), and the sliding block is in sliding fit with the vertical sliding groove.
9. The multifunctional signal processing board low-temperature damp-heat vibration comprehensive experiment box according to claim 8, wherein: the outer cover body comprises a cuboid section (24) and a combined section connected with the cuboid section as a whole, a cuboid cavity is formed in the cuboid section, a trapezoid cavity and a cuboid cavity which are mutually communicated are formed in the combined section, the cuboid cavity of the cuboid section is communicated with the trapezoid cavity, and the inner fixing block (19), the side connecting frame (29), the elastic cover piece (30), the first airflow grille (13), the second airflow grille (12) and the grille high-frequency adjusting mechanism are located in the cuboid cavity of the cuboid section and the cuboid cavity of the combined section.
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| BE1000697A6 (en) * | 1987-10-28 | 1989-03-14 | Irish Transformers Ltd | Device for testing integrated electrical circuits. |
| US7208067B2 (en) * | 2003-03-27 | 2007-04-24 | Tokyo Electron Limited | Method and system for monitoring RF impedance to determine conditions of a wafer on an electrostatic chuck |
| CN201618574U (en) * | 2009-06-23 | 2010-11-03 | 广东工业大学 | Open-type constant-temperature and constant-humidity environment test platform |
| CN102706780B (en) * | 2012-06-14 | 2014-01-08 | 江苏苏净集团有限公司 | Instrument for monitoring small particulate matters in air |
| CN104075861A (en) * | 2014-04-17 | 2014-10-01 | 东莞市众志检测仪器有限公司 | Comprehensive temperature, humidity and vibration testing device |
| DE202015001501U1 (en) * | 2015-02-26 | 2016-05-30 | G.U.N.T. Gerätebau GmbH | Experimental device for investigation of heat transfer in forced convection |
| CN207215422U (en) * | 2017-09-04 | 2018-04-10 | 华南理工大学 | A kind of adjustable wind tunnel experiment attachment device of seepage flow aerial temperature and humidity |
| CN207843678U (en) * | 2018-01-30 | 2018-09-11 | 重庆秦嵩科技有限公司 | One kind being used for signal-processing board low temperature moist thermal vibration comprehensive experiment box |
| CN207850712U (en) * | 2018-03-08 | 2018-09-11 | 西南交通大学 | A kind of damper temperature characterisitic experimental stand |
| CN210741795U (en) * | 2019-11-27 | 2020-06-12 | 桂林航天工业学院 | Civil engineering structure anti-seismic test device |
| CN111855042A (en) * | 2020-08-26 | 2020-10-30 | 桂林电子科技大学 | Stress measuring device under collision impact load |
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