CN214225273U - Handheld terminal for intelligent measurement of railway electrical characteristics - Google Patents
Handheld terminal for intelligent measurement of railway electrical characteristics Download PDFInfo
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- CN214225273U CN214225273U CN202022841285.5U CN202022841285U CN214225273U CN 214225273 U CN214225273 U CN 214225273U CN 202022841285 U CN202022841285 U CN 202022841285U CN 214225273 U CN214225273 U CN 214225273U
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Abstract
The utility model provides a hand-held terminal for railway electrical characteristic intelligent measurement, which comprises a device body and a detection terminal, wherein a shell of the device body is provided with a touch display screen and a change-over switch; the device body is internally provided with a frequency shift measuring unit, a resistance measuring unit, a CPU core board, a wireless communication module and a power supply, the selector switch is respectively connected with the frequency shift measuring unit, the resistance measuring unit and the terminal interface, and the CPU core board is respectively connected with the frequency shift measuring unit and the resistance measuring unit; the touch display screen and the wireless communication module are respectively connected with the CPU core board.
Description
Technical Field
The utility model relates to a railway electrical characteristic measuring device, specific theory has related to a be used for railway electrical characteristic intelligent measurement's handheld terminal.
Background
When railway electrical service maintenance personnel are maintaining, instruments such as a frequency shift meter or a universal meter are needed to test the electrical characteristics of a project, multiple detection instruments are inconvenient to carry, and independent individual systems are arranged among the multiple detection instruments, so that the real value of the detection instruments cannot be realized.
In order to solve the above problems, people are always seeking an ideal technical solution.
Disclosure of Invention
The utility model aims at the not enough of prior art to a handheld terminal for railway electrical characteristics intelligent measurement is provided.
In order to realize the purpose, the utility model discloses the technical scheme who adopts is: a handheld terminal for railway electrical characteristic intelligent measurement comprises a device body and a detection terminal, wherein a shell of the device body is provided with a terminal interface, a touch display screen and a change-over switch, and the detection terminal is inserted into the terminal interface; the device body is internally provided with a frequency shift measuring unit, a resistance measuring unit, a CPU core board, a wireless communication module and a power supply, the change-over switch is respectively connected with the frequency shift measuring unit, the resistance measuring unit and the terminal interface, and the terminal interface is connected with the frequency shift measuring unit or the resistance measuring unit according to the state of the change-over switch; the CPU core board is respectively connected with the frequency shift measurement unit and the resistance measurement unit and is used for sending a control instruction to the frequency shift measurement unit or the resistance measurement unit after receiving an electrical characteristic measurement instruction and receiving an electrical characteristic measurement result returned by the frequency shift measurement unit or the resistance measurement unit; the touch display screen is connected with the CPU core board and used for inputting an electrical characteristic measurement instruction to the CPU core board and displaying an electrical characteristic measurement result; the wireless communication module is connected with the CPU core board and is used for realizing the long-distance wireless communication between the handheld terminal and an external terminal; the power supply is connected with the CPU core board and used for supplying power to the CPU core board.
Compared with the prior art, the utility model has substantive characteristics and progress, in particular to the utility model, the frequency shift meter and the universal meter are integrated, so that the hand-held terminal can carry out frequency shift measurement and normal voltage and current electrical measurement according to the requirement, and the hand-held terminal has small volume and convenient carrying; simultaneously the utility model discloses still possess "cell-phone" functions such as orientation module, camera, pronunciation, in other words mix together the whole and partial functions of this three of shift frequency table, multimeter and cell-phone to realize the intelligent measurement of railway electrical characteristic, enlarge its application scene.
Drawings
Fig. 1 is a schematic block diagram of embodiment 1 of the present invention.
Fig. 2 is a schematic diagram of the frequency shift measurement unit of the present invention.
Fig. 3 is a schematic diagram of the resistance measuring unit of the present invention.
Fig. 4 is a schematic block diagram of embodiment 2 of the present invention.
Fig. 5 is a layout schematic diagram of embodiment 3 of the present invention.
Fig. 6 is a layout schematic diagram of embodiment 4 of the present invention.
Detailed Description
The technical solution of the present invention will be described in further detail through the following embodiments.
Example 1
The embodiment provides a handheld terminal for railway electrical characteristic intelligent measurement, which comprises a device body and a detection terminal, wherein a shell of the device body is provided with a terminal interface, a touch display screen and a change-over switch, and the detection terminal is inserted into the terminal interface;
the device body is internally provided with a frequency shift measuring unit, a resistance measuring unit, a CPU core board, a wireless communication module and a power supply, the change-over switch is respectively connected with the frequency shift measuring unit, the resistance measuring unit and the terminal interface, and the terminal interface is connected with the frequency shift measuring unit or the resistance measuring unit according to the state of the change-over switch;
the CPU core board is respectively connected with the frequency shift measurement unit and the resistance measurement unit and is used for sending a control instruction to the frequency shift measurement unit or the resistance measurement unit after receiving an electrical characteristic measurement instruction and receiving an electrical characteristic measurement result returned by the frequency shift measurement unit or the resistance measurement unit; the frequency shift measuring unit is used for measuring frequency shift electrical characteristics, and the resistance measuring unit is used for measuring resistance electrical characteristics;
the touch display screen is connected with the CPU core board and used for inputting an electrical characteristic measurement instruction to the CPU core board and displaying an electrical characteristic measurement result;
the wireless communication module is connected with the CPU core board and is used for realizing the long-distance wireless communication between the handheld terminal and an external terminal;
the power supply is connected with the CPU core board and used for supplying power to the CPU core board.
When the system is used, the APP is installed on the handheld terminal, and the wireless communication module is connected with the electric service production command system; the electric service production command system issues an electric characteristic test task;
logging in the APP by a tester, browsing the electrical characteristic test tasks issued by the electrical affair production command system, and selecting the current test task;
the testing personnel is connected with the equipment to be tested through the detection terminal to detect the electrical characteristics of the equipment to be tested;
after the tested data are stable and correct, a tester firstly selects the tested data through the touch display screen, then selects the corresponding test item, clicks and stores the test item, and generates a test record;
after the test task is completed, the wireless communication module submits the test data of the electrical characteristics and related information (personnel, time and the like) to the electric service production command system, so that the informatization management and application of the test data are realized.
The utility model discloses to shift two unifications of measuring function and universal meter's resistance measurement function of shifting frequency of table frequently, and use change over switch realizes shifting frequency measurement function and resistance measurement function's switching, makes handheld terminal can shift as required and measure with electric property measurement such as normal voltage electric current frequently, and is small, convenient to carry.
In specific implementation, the CPU core board is an STM32MP157 CPU core board, the STM32MP157 core board is a Miller electron development kit MYD-YA157C based on an STM32MP157 processor, and the kit consists of a core board MYC-YA157C and a bottom board MYB-YA 157C. The MYC-YA157C core board adopts an STM32MP157AAC processor, and an STPMIC power supply chip, a DDR3, an eMMC and a Nand Flash memory are onboard. The size of the core board PCB is 43mm x 45 mm. MYC-YA157C has the characteristics of high performance, high cost performance and long supply time, and is suitable for the requirements of core boards required by high-performance intelligent equipment.
In a specific implementation, the frequency shift measurement unit comprises a gating switch, a voltage multiplication unit, a first operational amplifier, a second operational amplifier and an analog-to-digital converter circuit, wherein the voltage multiplication unit is used for inputting a gating enable signal to the gating switch; the detection circuit comprises a detection voltage (DDY +, DDY-) signal/detection current signal (DL +, DL-) which is amplified by a first operational amplifier and flows to a gating switch, and flows to a second operational amplifier through the gating switch, the second operational amplifier amplifies the detection voltage/current signal and then transmits the amplified detection voltage/current signal to an analog-to-digital converter circuit, and the analog-to-digital converter circuit is used for converting the detection voltage/current signal into a digital signal and transmitting the digital signal to a CPU core board for frequency shift operation.
As shown in fig. 2, the gating switch is a 74HC4052 chip, and the 74HC4052 chip is a 2-way four-out-of-one analog switch; the voltage multiplication unit comprises a MAX660M chip, and the MAX660M chip is a switched capacitor voltage converter; the first operational amplifier is an OPA335AIDBVT operational amplifier chip, the second operational amplifier is an OPA2227UA, the analog-to-digital converter circuit comprises an ADS1271IBPWR chip, and the ADS1271IBPWR chip is an analog conversion chip.
During specific implementation, the resistance measuring unit comprises a multimeter chip, and the multimeter chip is used for receiving the resistance detection signal (DZ +, DZ-) and outputting a resistance detection result to the CPU core board.
As shown in FIG. 3, the multimeter chip is DTA 0660.
In specific implementation, the wireless communication module is one or more of Bluetooth, wifi and 4G; the power supply of the handheld terminal is a high-capacity battery.
In specific implementation, the handheld terminal further comprises a storage module, an illuminating lamp and a vibration motor, wherein the storage module is connected with the CPU core board and used for realizing data storage; the illuminating lamp is connected with the CPU core board and is used for realizing an illuminating function; the vibration motor is connected with the CPU core board and used for realizing vibration reminding.
When the device is specifically implemented, the handheld terminal is further provided with a power key, a USB interface and a charging interface on the shell of the device body, a through hole is formed in the lower portion of the touch display screen, a home function key is arranged in the through hole, a return key position and a menu key position are arranged on the touch display screen and at the position where the home function key is located on the same horizontal line, the power key, the USB interface, the home function key, the return key position and the menu key position are all connected with the CPU core board, the charging interface is connected with the battery, and the power key is connected in series with the battery and the CPU core board.
Example 2
This example differs from example 1 in that: as shown in fig. 4, the handheld terminal further includes an RFID reader and a camera module, where the RFID reader is connected to the CPU core board and configured to read data information of an RFID tag mounted on a device or a tool and send the data information to the CPU core board; the camera module is connected with the CPU core board and is used for realizing video image acquisition;
the handheld terminal further comprises a microphone, an audio power amplifier, a GPS + Beidou/GLONASS multimode positioning module and an auxiliary positioning sensor, wherein the microphone is connected with the CPU core board and used for realizing voice acquisition; the audio power amplifier is connected with the CPU core board and used for realizing voice playing; the GPS + Beidou/GLONASS multimode positioning module is connected with the CPU core board and used for realizing positioning, and the auxiliary positioning sensor is connected with the CPU core board and used for assisting the GPS + Beidou/GLONASS multimode positioning module to complete positioning.
Specifically, the auxiliary positioning sensor includes one or more of a direction sensor, a gravity sensor, a geomagnetic sensor, a linear acceleration sensor, a rotation vector sensor, a proximity sensor, and a gyro sensor.
When the device is specifically implemented, the handheld terminal is further provided with a volume key and an earphone interface on the shell of the device body, and the volume key and the earphone interface are connected with the CPU core board.
The application scenarios of this embodiment are as follows:
1. intelligent inspection device
When the system is used, the APP software is installed on the handheld terminal, the APP software is logged in after work every day, and a polling task is received; reading data information of an RFID label installed on equipment or a tool through the RFID, scanning a bar code or a two-dimensional code through the camera module, recording the name of each piece of equipment, and performing an electrical characteristic test; the problem is not found by default, when the problem exists, manual input or voice input conversion is supported to generate problem description, then the problem condition is comprehensively displayed by photographing (not more than 3 sheets) through the camera module, bad conditions can also be expressed through instrument measurement data, and the problem description is stored after the input is finished; and then storing or uploading the polling task of the handheld terminal.
And after the data are reworked, the data are completely uploaded, and an inspection report (in which an inspection task plan, completion conditions, inspection records, inspection route traces, problems and photos are contained) is generated to complete the inspection task.
Point inspection of equipment, spare parts, instruments and tools
The camera module of the handheld terminal scans bar codes and two-dimensional code tags to realize the check of indoor equipment/spare parts/instruments/tools, the RFID reader scans RFID tags to realize the check of outdoor equipment, and finally the check is collected into an electric safety production management information system to realize the whole-section asset check.
Remote emergency command (audio and video transmission)
After the emergency treatment is started, acquiring field videos and voices through a camera and voice input equipment of the handheld terminal, and transmitting the videos and the voices to a background, wherein the background can be accessed to the inspection instrument at multiple points for remote interactive guidance; and displaying the indication of the background through the audio power amplifier and the touch display screen.
The utility model discloses still possess "cell-phone" functions such as orientation module, camera, pronunciation, in other words mix the whole and partial function of this three of frequency shift meter, multimeter and cell-phone together to realize the intelligent measurement of railway electrical characteristic, enlarge its wisdom application scene.
Example 3
In this embodiment, a schematic diagram of a framework of the handheld terminal during use is given, and as shown in fig. 5, the handheld terminal uses a general 4G or railway dedicated GSMR platform as a wide area communication basis, and implements data real-time interaction with a system such as an electric service safety production command platform and signal centralized monitoring after safety isolation by using a server arranged in an electric service section or a road bureau.
The method specifically comprises the following steps:
the central layer is arranged in the electric service section and mainly used for placing a safety interface server, an application server, network equipment and a terminal; the safety interface server is responsible for data exchange with the electric service production command system and the signal centralized monitoring system center through the safety data platform and for data interaction with the fixed PC terminals and the handheld terminals distributed in workshops and stations through the 4G network.
The network equipment is used for building a central high-speed intranet to realize network connection among the equipment; meanwhile, the connection with other systems and 4G communication networks is realized by matching with a safety interface server.
The application server responds to the application service requirement of the terminal, and simultaneously, the functions of data statistics, analysis and storage of the system at the center layer can be expanded subsequently.
The hand-held terminal is configured with a public network 4G card, accesses an interface server through a fixed IP address of a public mobile network, sets a firewall or a gatekeeper in a CSM center or a production command system center, performs security authentication, and meets corresponding equal security requirements. And accessing to a CSM center or a production command center.
And data interaction between each workshop and each work area and the data of the handheld terminal is realized through a CSM center or a production command center, so that real-time online can be realized. And the network security interface is unique, so that management and control are facilitated.
Example 4
In this embodiment, another usage system of the handheld terminal is provided, as shown in fig. 6, if a complete central server and a complete security communication platform are not set up during initial application, the handheld terminal and the work area production command terminal implement data interaction in an offline communication mode (wifi or bluetooth).
The system is arranged in each work area or workshop, the handheld terminal is accessed to the work area terminal of the production command system by WiFi/Bluetooth, and manual data synchronization is carried out by an off-line mode (WiFi is arranged only in the work area environment).
In communication, the hand-held terminal does not adopt public network (such as 4G, and the function can be shielded if necessary) communication, and only exists as a special wireless interface device of the terminal in the work area.
In the terminal of the work area, a device firewall or a network gate can be added according to the requirement of network security to carry out safe communication.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.
Claims (10)
1. A hand-held terminal for railway electrical characteristic intelligent measurement which characterized in that: the device comprises a device body and a detection terminal, wherein a shell of the device body is provided with a terminal interface, a touch display screen and a change-over switch, and the detection terminal is inserted into the terminal interface;
the device body is internally provided with a frequency shift measuring unit, a resistance measuring unit, a CPU core board, a wireless communication module and a power supply, the change-over switch is respectively connected with the frequency shift measuring unit, the resistance measuring unit and the terminal interface, and the terminal interface is connected with the frequency shift measuring unit or the resistance measuring unit according to the state of the change-over switch;
the CPU core board is respectively connected with the frequency shift measurement unit and the resistance measurement unit and is used for sending a control instruction to the frequency shift measurement unit or the resistance measurement unit after receiving an electrical characteristic measurement instruction and receiving an electrical characteristic measurement result returned by the frequency shift measurement unit or the resistance measurement unit;
the touch display screen is connected with the CPU core board and used for inputting an electrical characteristic measurement instruction to the CPU core board and displaying an electrical characteristic measurement result;
the wireless communication module is connected with the CPU core board and is used for realizing the long-distance wireless communication between the handheld terminal and an external terminal;
the power supply is connected with the CPU core board and used for supplying power to the CPU core board.
2. The handheld terminal of claim 1, wherein: the frequency shift measurement unit comprises a gating switch, a voltage multiplication unit, a first operational amplifier, a second operational amplifier and an analog-to-digital converter circuit, wherein the voltage multiplication unit is used for inputting a gating enable signal to the gating switch; the detection voltage/current signal is amplified by the first operational amplifier and then flows to the gating switch, and flows to the second operational amplifier through the gating switch, the second operational amplifier amplifies the detection voltage/current signal and then transmits the amplified detection voltage/current signal to the analog-to-digital converter circuit, and the analog-to-digital converter circuit is used for converting the detection voltage/current signal into a digital signal and transmitting the digital signal to the CPU core board for frequency shift operation.
3. The handheld terminal of claim 1, wherein: the resistance measuring unit comprises a multimeter chip, wherein the multimeter chip is used for receiving a resistance detection signal and outputting a resistance detection result to the CPU core board.
4. The handheld terminal of claim 1, wherein: the RFID reader is connected with the CPU core board and used for reading data information of an RFID label installed on equipment or a tool and sending the data information to the CPU core board.
5. The handheld terminal of claim 1, wherein: still include the module of making a video recording, the module of making a video recording with CPU core plate connects for realize video image and gather.
6. The handheld terminal of claim 1, wherein: the microphone is connected with the CPU core board and used for realizing voice acquisition; the audio power amplifier is connected with the CPU core board and used for realizing voice playing.
7. The handheld terminal of claim 1, wherein: the GPS/GLONASS multi-mode positioning system is characterized by further comprising a GPS + Beidou/GLONASS multi-mode positioning module and an auxiliary positioning sensor which are respectively connected with the CPU core board, wherein the auxiliary positioning sensor comprises one or more of a direction sensor, a gravity sensor, a geomagnetic sensor, a linear acceleration sensor, a rotation vector sensor, a proximity sensor and a gyroscope sensor.
8. The handheld terminal of claim 1, wherein: the storage module is connected with the CPU core board and used for realizing data storage; the illuminating lamp is connected with the CPU core board and is used for realizing an illuminating function; the vibration motor is connected with the CPU core board and used for realizing vibration reminding.
9. The handheld terminal of claim 1, wherein: still be provided with volume button, power button, USB interface, the interface and the earphone interface charge on the shell of device body, the through-hole has been seted up to touch display screen's lower part, be provided with home function button in the through-hole, touch display screen go up with home function button is located the position of same water flat line and is provided with and returns key position and menu key position, the volume button the power button the USB interface the home function button return the key position the menu key position and the earphone interface all with CPU core plate connects, charge the interface with power supply connects, the power button is established ties power supply with between the CPU core plate.
10. The handheld terminal of claim 1, wherein: the power supply is a high-capacity battery, and the CPU core board is an STM32MP157 CPU core board; the wireless communication module is one or more of Bluetooth, wifi and 4G.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022841285.5U CN214225273U (en) | 2020-12-01 | 2020-12-01 | Handheld terminal for intelligent measurement of railway electrical characteristics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022841285.5U CN214225273U (en) | 2020-12-01 | 2020-12-01 | Handheld terminal for intelligent measurement of railway electrical characteristics |
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| Publication Number | Publication Date |
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| CN214225273U true CN214225273U (en) | 2021-09-17 |
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| CN202022841285.5U Active CN214225273U (en) | 2020-12-01 | 2020-12-01 | Handheld terminal for intelligent measurement of railway electrical characteristics |
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