CN214375945U - Portable multidata collection system - Google Patents
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- CN214375945U CN214375945U CN202120545575.7U CN202120545575U CN214375945U CN 214375945 U CN214375945 U CN 214375945U CN 202120545575 U CN202120545575 U CN 202120545575U CN 214375945 U CN214375945 U CN 214375945U
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Abstract
The embodiment of the application provides a portable multidata acquisition device, which comprises a computer, a box body, a rack inside the box body, a power module, a compact DAQ case, a data I/O module for integrated signal conditioning and a measurement and control panel. The compact DAQ case, the power module and the measurement and control panel are connected with each other through the rack; the measurement and control panel is provided with a delta-shaped power socket, a power switch and a plurality of functional plug-in partitions, and different types of wiring terminals are arranged on the functional plug-in partitions; the data I/O module for integrated signal conditioning is inserted into the card slot of the CompactDAQ case and is connected with the wiring terminal on the corresponding functional plug-in partition through a cable; and a sensor or an actuating element outside the data acquisition device is connected with the corresponding data I/O module for integrated signal conditioning through a wiring terminal. Through the processing scheme of this application, make device convenient to carry, the test is reliable and stable, and the acquisition channel is sufficient, has many timing engines, can satisfy various experimental demands, has increased experimental flexibility.
Description
Technical Field
The application relates to the technical field of data acquisition and processing, in particular to a portable multi-data acquisition device.
Background
With the improvement of national economic level, the nation vigorously develops and supports industries which have important effects on national defense safety and driving economic development, organizes and implements national important technical and scientific specials and promotes the accelerated development of high-end equipment manufacturing industry. The great special item of aeroengines and gas turbines, the "LJ" special item, is put forward in this context. Gas turbine/aeroengine component testing, maintenance inspection and field testing of some large-scale electrical systems require measurement of various signal parameters, such as current, voltage, vibration, steady/dynamic pressure, temperature, pollutant index, strain, noise and the like, to comprehensively evaluate their performance indexes; the above tests or detection are usually carried out on the site where the equipment is used, and generally, the equipment use site does not have measurement and control technical conditions. In addition, even if a measurement and control system exists nearby a site, the traditional measurement and control system generally is constructed in a cabinet form due to the fact that a large number of hardware devices are needed, the size and the weight are large, test wiring is often carried out among high-rise device electronics, and instrument carrying is very labor-consuming and time-consuming; on the other hand, the test field space is limited, the field environment is complex, and the cabinet type data acquisition system is difficult to arrange on the field. If the on-site sensor is led to the measurement and control center, a longer cable is needed, which greatly aggravates the problem of difficulty in on-site measurement and control. Not only does the need to lengthen the sensor leads increase the cost of testing, but it can also cause signal interference in some cases.
Meanwhile, a test site is often accompanied by a severe environment, such as high temperature, high pressure, high rotating speed and high noise, and requirements are also provided for the durability and robustness of the equipment.
The conventional small signal acquisition equipment on the market at present has one or more of the following disadvantages: the method has the advantages of low sampling rate, only real-time reading but no data storage or return, no robustness, limited acquisition signal types, acquisition function but no signal output function, poor field environment adaptability, easy generation of unstable placement, poor operation experience and the like.
At present, research and development of a data acquisition box which is convenient to carry, powerful in function and strong in universality becomes a problem to be solved urgently.
SUMMERY OF THE UTILITY MODEL
In view of the above, embodiments of the present application provide a portable multiple data acquisition device, which at least partially solves the problems in the prior art.
The embodiment of the application provides a portable multidata acquisition device, which comprises a computer, a box body, a frame, a power supply module, a compact DAQ case, a data I/O module integrated with signal conditioning and a measurement and control panel, wherein the frame, the power supply module, the compact DAQ case, the data I/O module integrated with signal conditioning and the measurement and control panel are arranged in the box body,
the frame is formed by connecting sectional materials through connecting pieces;
the compact DAQ case, the power module and the measurement and control panel are connected with each other through the rack;
the measurement and control panel is provided with a power socket, a power switch and a plurality of functional plug-in partitions; different types of wiring terminals are arranged on each functional plug-in partition;
the data I/O module integrated with signal conditioning is inserted into a card slot of the CompactDAQ case and is connected with various sensors or execution elements outside the data acquisition device through the wiring terminals on the functional plug-in partitions.
According to a specific implementation manner of the embodiment of the application, the functional plug-in partition corresponds to the data I/O module conditioned by the integrated signal one to one, and the number of the wiring terminals on the functional plug-in partition is equal to the number of channels corresponding to the data I/O module conditioned by the integrated signal.
According to a specific implementation manner of the embodiment of the application, the functional plug-in partition includes one or more of a functional plug-in area for collecting/outputting a voltage signal, a functional plug-in area for collecting/outputting a current signal, a functional plug-in area for collecting a sound and vibration dynamic signal, a functional plug-in area for collecting a strain signal, a functional plug-in area for collecting a thermocouple/thermal resistance temperature signal, and a counter functional plug-in area.
According to a concrete implementation mode of this application embodiment, binding post chooses for use different grade type plugs for use according to gathering/output signal's classification and is used for connecting the sensor, the plug includes multicore plug-in binding post, two-core aviation plug, thermocouple plug and BNC radio frequency adapter plug.
According to a specific implementation manner of the embodiment of the application, the measurement and control panel is further provided with a BNC trigger input interface, and the BNC trigger input interface is connected with the CompactDAQ case through a cable and used for realizing triggering of a trigger signal or an external event, and the data acquisition device starts data acquisition.
According to a specific implementation mode of the embodiment of the application, the measurement and control panel is further provided with a data transmission interface, the data transmission interface is connected with a computer through a data transmission line, and data acquisition software designed based on LabVIEW compiling is installed in the computer.
According to a concrete implementation mode of the embodiment of the application, an Ethernet interface is further arranged on the panel of the measurement and control box and used for connecting a plurality of the data acquisition devices in series to build a distributed measurement and control system.
According to a specific implementation manner of the embodiment of the application, the CompactDAQ chassis has three analog input timing engines, so that data acquisition tasks with different sampling rates can be performed simultaneously.
According to a specific implementation manner of the embodiment of the application, the rear side face of the box body is provided with a cooling fan and a cooling hole.
According to a concrete mode of realization of this application embodiment, box bottom surface four corners is provided with the maintenance nut, the female connection of maintenance nut has altitude mixture control piece, altitude mixture control piece bottom is provided with anti-skidding rubber pad.
According to a concrete implementation mode of the embodiment of the application, the data acquisition box further comprises a box cover which is arranged at the top of the box body and can be opened and closed, a handle which is arranged on the front side face of the box body and coded locks which are positioned on two sides of the handle.
Advantageous effects
The portable multi-data acquisition device in the embodiment of the application has the advantages of few internal components, small size of the whole shell, low power consumption, simple operation, light weight of the shell, high strength, convenience in carrying and stability in placement;
the device can meet various test requirements, increases the test flexibility, reduces the input cost of instrument equipment while ensuring the data acquisition precision, increases the data analysis and processing function, and provides convenience for testers;
the device can be used for static and dynamic tests and can be applied to various test environments; the acquisition channel can synchronously acquire data, the accuracy is high, the range is wide, the connection mode of the acquisition device and the sensor is simple and convenient, and the requirements of data acquisition along with connection and acquisition are met;
the sensor can be connected with various sensors, and has high universality and wide application range; the multi-timing engine is arranged, so that different data acquisition tasks can be performed at different sampling rates;
by adopting a modularized mode, each data I/O module corresponds to one functional plug-in area on the panel, the wiring is convenient, stable and reliable, and the acquisition channel is sufficient;
the intelligent control system not only has a data acquisition function, but also has a current and voltage signal output function, and can realize automatic control of a field mass flow controller, a pneumatic regulating valve or an electric regulating valve.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a block diagram of a portable multiple data acquisition device according to an embodiment of the present invention;
fig. 2 is a structural diagram of a measurement and control panel according to an embodiment of the present invention.
In the figure: 1. a box body; 2. a box cover; 3. a measurement and control panel; 31. a power socket; 32. a data transmission interface; 33. a power switch; 34. a function plug-in area for collecting/outputting current signals; 35. a functional plug-in area for collecting sound and vibration dynamic signals; 36. a function plug-in area for collecting/outputting voltage signals; 37. a functional plug-in area for collecting thermocouple/thermal resistor temperature signals; 38. using human unit name and logo; 39. fixing the mounting hole; 4. a power supply module; 5. a CompactDAQ chassis; 6. a storage box; 7. a first handle; 8. a coded lock; 9. a second handle.
Detailed Description
The embodiments of the present application will be described in detail below with reference to the accompanying drawings.
The following description of the embodiments of the present application is provided by way of specific examples, and other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure herein. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The present application is capable of other and different embodiments and its several details are capable of modifications and/or changes in various respects, all without departing from the spirit of the present application. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the present application, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. Additionally, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present application, and the drawings only show the components related to the present application rather than the number, shape and size of the components in actual implementation, and the type, amount and ratio of the components in actual implementation may be changed arbitrarily, and the layout of the components may be more complicated.
In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects may be practiced without these specific details.
A portable multiple data acquisition apparatus provided in the present application is designed based on an NI (National Instruments, National Instruments ltd) CompactDAQ system (portable data acquisition system) and a LabVIEW platform.
For the compact, robust, powerful data acquisition platform CompactDAQ offered by the national instruments NI corporation, which integrates connectivity, data acquisition, and signal conditioning functions with direct access to any sensor or signal, the NI corporation currently offers over 100C-series integrated signal conditioning data I/O modules for measurement, control, and communication applications, using CompactDAQ in conjunction with LabVIEW, the user can easily define how to acquire, analyze, visualize, and manage measurement data. But in use it was found to have the following problems: (1) because the case and the acquisition card are small in size, the space of a wiring terminal installation panel is limited, for example, an NI-9206 type voltage signal acquisition card is taken as an example, 32 acquisition channel wiring terminals are integrated on a 15mm x 65mm installation panel, when a large number of sensors need to be connected, the installation is difficult, and the condition that the corresponding relation between the sensors and the acquisition channels is wrong easily occurs. (2) The sensor lead is thin, and when the sensor lead shakes due to external reasons or the acquisition case needs to move, the wiring pin is broken easily. (3) The sensor is connected with the wiring terminal by a special tool, and the sensor can not be used and plugged, namely, is pulled out when being moved. (4) The dust-proof, waterproof and shockproof effects are avoided in the using process; the user is easy to generate hot plug behavior, which affects the service life of the product. (5) Although small, it is not convenient to carry and has a poor experience when used outdoors or in field testing situations.
The present application is therefore directed to improvements in the CompactDAQ system and problems that arise during practical use, and a portable multiple data acquisition device provided by an embodiment of the present application will be described in detail with reference to fig. 1-2.
Referring to fig. 1, the portable multiple data acquisition device mainly includes a computer, a box 1, a rack (not shown) inside the box 1, a power module 4, a CompactDAQ box 5, a data I/O module (not shown) integrated with signal conditioning, and a measurement and control panel 3.
The frame is formed by connecting sectional materials through connecting pieces, the sectional materials can be hollow or solid, are made of materials with certain strength and toughness such as iron, steel or aluminum and the like, and mainly play a role in supporting and fixing. In this embodiment, the frame is formed by connecting the angle pieces and the T-shaped bolts and nuts by using the aluminum profiles to form a supporting frame, it should be understood that the connecting pieces may be of other types besides the T-shaped bolts and nuts, and are not limited to the examples described in this embodiment.
Specifically, the CompactDAQ chassis 5 is a CompactDAQ chassis of NI corporation, and has the following functions: CompactDAQ chassis 5 has three analog input timing engines. Using multiple timing engines to achieve multiple sampling rates, all analog inputs can be divided into at most three different "tasks," each of which can be run at an independent sampling rate, well suited for simultaneous low speed temperature measurements and higher speed sound and vibration measurements, etc.
The power module 4 includes, among other things, 220VAC and 24VDC power supplies for providing the required ac and dc power.
The measurement and control panel 3 is provided with a power socket 31 and a power switch 32, and more specifically, the power socket 31 is a delta-shaped ac power socket, the power switch 32 is an ac power switch, and preferably, the power switch 32 is a self-locking and self-resetting button switch with an LED indicator light.
The measurement and control panel 3 is further provided with a plurality of functional plug-in partitions which are arranged according to different types of collected signals, and different types of wiring terminals (not shown in the figure) are arranged on the functional plug-in partitions. The functional plug-in area comprises one or more of a functional plug-in area 36 for collecting/outputting voltage signals, a functional plug-in area 34 for collecting/outputting current signals, a functional plug-in area 35 for collecting sound and vibration dynamic signals, a functional plug-in area for collecting strain signals, a functional plug-in area 37 for collecting thermocouple/thermal resistor temperature signals and a counter functional plug-in area, wherein the counter functional plug-in area can be used for measuring edge technology, pulse width, period, frequency, encoder position and encoder speed. Therefore, the device not only has the data acquisition function, but also has the current and voltage signal output function, and can realize the automatic control of the on-site mass flow controller, the pneumatic regulating valve or the electric regulating valve; the device can be used for static and dynamic tests and can be applied to various test environments.
In one embodiment, the functional card partition includes 4 kinds, namely a functional card partition 34 for collecting/outputting current signals, a functional card partition 35 for collecting sound and vibration dynamic signals, a functional card partition 36 for collecting/outputting voltage signals, and a functional card partition 37 for collecting thermocouple/thermal resistance temperature signals, as described in detail with reference to fig. 2.
The data I/O module of integrated signal conditioning inserts in the draw-in groove of compactDAQ machine case 5, and has the spring buckle to fix it in the draw-in groove, prevents to become flexible and breaks away from, and compactDAQ machine case 5 can select for use 4 draw-in grooves or 8 draw-in grooves according to actual demand.
The data I/O module with integrated signal conditioning is inserted into the card slot of the CompactDAQ chassis 5 and connected to the connection terminal on each functional plug-in partition, where it is to be explained that the functional plug-in partitions and the data I/O module with integrated signal conditioning are in one-to-one correspondence according to the type of the collected signal; the number of the wiring terminals on each functional plug-in partition is equal to the number of channels of the data I/O module corresponding to the integrated signal conditioning. The modularized mode can lead the wiring to be convenient, stable and reliable, and the acquisition channel to be sufficient.
The connecting terminal is connected with a sensor or an actuating element outside the data acquisition device, in other words, the data I/O module integrated with signal conditioning is connected with various sensors or actuating elements outside the data acquisition device through the connecting terminal. Specifically, the sensors include a pressure sensor, a temperature sensor, a valve opening sensor, a level sensor speed sensor, an acceleration sensor, a vibration sensor, a sound wave sensor (microphone), and a strain sensor.
The connecting terminal can select different types of plugs according to different collected/output signals so as to be conveniently connected with the sensor, for example, a multi-core plug-in type connecting terminal, a two-core aviation plug, a thermocouple plug, a BNC radio frequency switching plug and the like.
Further, the measurement and control panel 3 is also provided with a BNC trigger input interface, and the BNC trigger input interface is connected with the CompactDAQ case 5 through a cable and is used for realizing that a trigger signal or an external event triggers the data acquisition device to start data acquisition.
In one embodiment, the measurement and control panel 3 is further provided with a data transmission interface 32, and the data transmission interface 32 is connected with a computer through a data transmission line. It should be explained here that the data transmission interface 32 may be a USB interface, and since the digital signals adopted by the USB data transmission communication protocol are not susceptible to electromagnetic interference, the portable multidata collection device can be arranged in close proximity to the test object to minimize the electrical noise in the environment. The USB bus communication mode comprises a standard data structure and a defined method for communication between equipment and a host, so that the portable multi-data acquisition device has high-speed and bidirectional flowing data transmission capability, and the use requirement of a test system for multi-path input and output which are frequently performed synchronously is completely met; in addition, the matching with other equipment hosts is good, and the universality is strong.
The computer can be a desktop computer or a notebook computer according to actual requirements. In this embodiment, the computer is a notebook computer, the data transmission line is a USB data transmission line, and data acquisition software designed based on LabVIEW programming is installed in the computer, so that functions of different instruments and meters can be realized, automation control of field execution elements and data acquisition, storage, playback, processing and analysis can be realized, and integration of software and hardware can be realized.
In another embodiment, the measurement and control box panel 3 is further provided with an ethernet interface, which can be synchronized with a network cable through the ethernet interface, and is used for connecting a plurality of data acquisition devices in series to build a distributed measurement and control system, so as to expand data acquisition capability.
In another embodiment, the length, the width and the height of the data acquisition device are respectively set to be 450mm, 320mm and 250mm, and the shell is made of engineering plastics, so that the data acquisition device is light in weight, high in strength and convenient to carry.
Further, the data acquisition device is still including setting up in the case lid 2 that can open and shut at 1 top of box to and set up in the second handle 9 of 1 leading flank of box and be located the trick lock 8 of second handle 9 both sides, and second handle 9 can be for folding handle, portable, and trick lock 8 is used for locking case lid 2, is convenient for protect the safety of data acquisition device internals.
Furthermore, retention nuts are arranged at four corners of the bottom surface of the box body 1, height adjusting blocks are connected with the inner threads of the retention nuts, and anti-skidding rubber pads are arranged at the bottoms of the height adjusting blocks and used for carrying out height adjustment on the box body 1 according to requirements in an actual test environment and playing an anti-skidding role, so that the data acquisition device is more stable and reliable.
Further, the rear side surface of the box body 1 is provided with a cooling fan and a cooling opening, and the cooling opening can be designed into any other shape, preferably, a circular shape or a strip shape.
Further, still be provided with fixed mounting hole 39 on observing and controling panel 3, it is fixed with the frame of aluminium alloy through T type nut.
Further, still be provided with the screw hole on observing and controling panel 3, fix the first in command 7 on observing and controling panel 3 through the screw hole to conveniently take out from box 1 with observing and controling panel 3 and frame and overhaul.
Function plug-in components district right side is provided with receiver 6 for deposit reserve binding post and sensor lead wire, be provided with on the receiver 6 and open the door, and be equipped with the first in command 7 and be convenient for open the side and open the door.
The measurement and control panel 3 is also provided with a user unit name and a logo38 which are manufactured by etching technology, so that the affiliated unit or individual of the data acquisition device can be conveniently identified.
The data acquisition method of the portable multi-data acquisition device provided by the application specifically comprises the following steps:
connecting each type of sensor with a corresponding functional plug-in on a measurement and control panel 3 of the data acquisition device in a partition manner through a wiring terminal area 6;
the data transmission interface 32 on the measurement and control panel 3 is inserted into a data transmission line and is connected with a computer through the data transmission line;
the power socket 31 on the measurement and control panel 3 is connected with a 220VAC power supply, and the power switch 33 on the measurement and control panel 3 is clicked;
operating data acquisition software which is compiled and designed on the basis of LabVIEW on a computer, and configuring parameters of the data acquisition software according to parameters of an actual sensor, wherein the parameters comprise measuring range, sampling rate, conversion relation and the like;
clicking a 'start' button on data acquisition software to start data signal acquisition, and displaying acquired data in real time in a display mode of oscillograms, numbers and the like;
and clicking a storage button on the real-time software to acquire and store the data signals at the same time.
Preferably, the data transmission line is a USB cable, and the computer is a notebook computer.
Furthermore, acquisition modes such as 'limited duration', 'continuous acquisition' and the like can be set on software according to actual test requirements, the software also has functions of replaying data and the like, and the data can be calculated, analyzed and the like.
The embodiment provided by the application aims at the problems that the existing data acquisition box is low in sampling rate, incapable of real-time storage, unstable in device, easy to damage, inconvenient to carry and the like, and provides the portable multi-data acquisition device which has the advantages of few internal components, small overall shell size, low power consumption, simplicity in operation, light shell weight, high strength, convenience in carrying and stability in placement;
the device can meet various test requirements, increases the test flexibility, reduces the input cost of instrument equipment while ensuring the data acquisition precision, increases the data analysis and processing function, and provides convenience for testers;
the device can be used for static and dynamic tests and can be applied to various test environments; the acquisition channel can synchronously acquire data, the accuracy is high, the range is wide, the connection mode of the acquisition device and the sensor is simple and convenient, and the requirements of data acquisition along with connection and acquisition are met;
the sensor can be connected with various sensors, and has high universality and wide application range; the multi-timing engine is arranged, so that different data acquisition tasks can be performed at different sampling rates;
by adopting a modularized mode, each data I/O module corresponds to one functional plug-in area on the panel, the wiring is convenient, stable and reliable, and the acquisition channel is sufficient;
the intelligent control system not only has a data acquisition function, but also has a current and voltage signal output function, and can realize automatic control of a field mass flow controller, a pneumatic regulating valve or an electric regulating valve.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (11)
1. A portable multidata acquisition device is characterized by comprising a computer, a box body, a frame, a power supply module, a compact DAQ case, a data I/O module integrated with signal conditioning and a measurement and control panel which are arranged in the box body, wherein,
the frame is formed by connecting sectional materials through connecting pieces;
the compact DAQ case, the power module and the measurement and control panel are connected with each other through the rack;
the measurement and control panel is provided with a power socket, a power switch and a plurality of functional plug-in partitions; different types of wiring terminals are arranged on each functional plug-in partition;
the data I/O module integrated with signal conditioning is inserted into a card slot of the CompactDAQ case and is connected with various sensors or execution elements outside the data acquisition device through the wiring terminals on the functional plug-in partitions.
2. The portable multiple data collection device of claim 1, wherein said integrated signal conditioned data I/O modules are in one-to-one correspondence with said functional card partitions, and wherein the number of said terminals on said functional card partitions is equal to the number of channels corresponding to said integrated signal conditioned data I/O modules.
3. The portable multiple data collection device of claim 1, wherein said functional plug-in partition includes one or more of a functional plug-in area for collecting/outputting voltage signals, a functional plug-in area for collecting/outputting current signals, a functional plug-in area for collecting sound and vibration dynamic signals, a functional plug-in area for collecting strain signals, a functional plug-in area for collecting thermocouple/thermistor temperature signals, and a counter functional plug-in area.
4. A portable multiple data acquisition device as defined in claim 1 wherein said terminals select different types of plugs for connecting to said sensors based on the type of signal being acquired/output, said plugs including multi-pin plug terminals, two-pin aviation plugs, thermocouple plugs and BNC radio frequency patch plugs.
5. The portable multiple data acquisition device of claim 1, wherein the measurement and control panel further comprises a BNC trigger input interface, the BNC trigger input interface is connected to the CompactDAQ box through a cable, and is configured to trigger the data acquisition device to start data acquisition by a trigger signal or an external event.
6. The portable multiple data collection device of claim 1, wherein said measurement and control panel is further provided with a data transmission interface, said data transmission interface is connected to a computer through a data transmission line, and data collection software designed based on LabVIEW is installed in said computer.
7. The portable multiple data acquisition device of claim 1, wherein the measurement and control panel is further provided with an ethernet interface for connecting a plurality of data acquisition devices in series to build a distributed measurement and control system.
8. The portable multiple data acquisition device of claim 1, wherein the CompactDAQ chassis has three analog input timing engines to enable simultaneous data acquisition tasks at different sampling rates.
9. A portable multiple data collection device as defined in claim 1, wherein said case body is provided at a rear side thereof with a heat radiation fan and a heat radiation port.
10. A portable multidata collection device according to claim 1, wherein retention nuts are provided at four corners of the bottom surface of the case, height adjusting blocks are connected to the retention nuts through internal threads, and anti-skid rubber pads are provided at the bottoms of the height adjusting blocks.
11. A portable multidata collection apparatus as defined in claim 1, wherein the data collection box further comprises a lid which is openable and closable and is provided on the top of the box, and a handle provided on the front side of the box and a combination lock provided on both sides of the handle.
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| CN202120545575.7U CN214375945U (en) | 2021-03-16 | 2021-03-16 | Portable multidata collection system |
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| CN202120545575.7U CN214375945U (en) | 2021-03-16 | 2021-03-16 | Portable multidata collection system |
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