CN206876806U - Hand-held measuring apparatus - Google Patents
Hand-held measuring apparatus Download PDFInfo
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- CN206876806U CN206876806U CN201720661821.9U CN201720661821U CN206876806U CN 206876806 U CN206876806 U CN 206876806U CN 201720661821 U CN201720661821 U CN 201720661821U CN 206876806 U CN206876806 U CN 206876806U
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- 229920006351 engineering plastic Polymers 0.000 claims description 3
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- 238000000034 method Methods 0.000 abstract description 5
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
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- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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Abstract
Hand-held measuring apparatus belongs to the field of measuring technique of DC current, more particularly to a kind of hand-held measuring apparatus.The utility model provides a kind of safe, easy to use handheld device.The utility model includes shell 3, button 4, liquid crystal display 5 and charging inlet 13 are provided with shell 3, handheld device battery 6, handheld device antenna 7, LCD Interface 8, handheld device MCU9, storage circuit 10, handheld device wireless communication module 11 and real time clock circuit 12 are provided with shell 3；MCU9 is connected with storage circuit 10, handheld device wireless communication module 11, real time clock circuit 12, button 4 respectively, MCU9 is connected by LCD Interface 8 with liquid crystal display 5, handheld device wireless communication module 11 is connected with handheld device antenna 7, and handheld device battery 6 is connected with charging inlet 13.
Description
Technical field
The utility model belongs to the field of measuring technique of DC current, more particularly to a kind of hand-held measuring apparatus.
Background technology
Insulation of electrical installation preventive trial be ensure equipment safety operation important measures, DC break down voltage experiment can and
The defects of Shi Faxian insulating inners are hidden, therefore DC break down voltage experiment is the experiment item that power equipment must be done in interruption maintenance
One of mesh.But in HVDC TEST, the microampere meter for measuring DC current is often subject to interference or even damaged, transport
It can not occur with being vulnerable to vibrations in experiment and being impacted in high pressure generator discharge process the problems such as normal work
Rate is higher, and can not mutually be replaced because the high pressure microampere size of different factories production is different, result in experiment process
Once microampere meter damages in, and whole experiment can not carry out long-time.
The content of the invention
The utility model is aiming above mentioned problem, there is provided a kind of safe, easy to use hand-held measuring apparatus.
To achieve the above object, the utility model adopts the following technical scheme that, the utility model includes shell 3, on shell 3
Button 4, liquid crystal display 5 and charging inlet 13 are provided with, handheld device battery 6, handheld device antenna 7, liquid crystal are provided with shell 3
Shield interface 8, handheld device MCU9, storage circuit 10, handheld device wireless communication module 11 and real time clock circuit 12；MCU9 points
It is not connected with storage circuit 10, handheld device wireless communication module 11, real time clock circuit 12, button 4, MCU9 passes through liquid crystal display
Interface 8 is connected with liquid crystal display 5, and handheld device wireless communication module 11 is connected with handheld device antenna 7, handheld device battery 6 with
Charging inlet 13 is connected.
As a kind of preferred scheme, shell described in the utility model uses engineering plastics shell, and button is pressed using PVC film
Key, LCDs are to use 128 × 64 dot matrix display screens.
As another preferred scheme, handheld device MCU described in the utility model uses C8051F002 chip U4, in real time
Clock circuit uses DS1302 chips, and handheld device wireless communication module uses REF24L01 chips, and storage circuit uses
M25P128 chips, liquid crystal display use B12864 model liquid crystal displays.
U4 1 pin is connected with the pin of REF24L01 chips 18, U4 2~5 pin respectively with the 11 of B12864 model liquid crystal displays~
14 pin are corresponding to be connected, and U4 6 pin are connected with ground wire, electric capacity C19 one end respectively, the electric capacity C19 other ends respectively with SYS_VCC_
3.3V power ends, U4 7 pin are connected, U4 8~11,14,15,22~24 connections corresponding with Key pad port K1~K9 respectively；U4
5 pin of 16 pin respectively with resistance R11 one end, DS1302 chips be connected, the resistance R11 other ends respectively with resistance R10 one end,
SYS_VCC_3.3V power ends, electric capacity C18 one end, resistance R12 one end, 1 pin of DS1302 chips are connected, the electric capacity C18 other ends
Ground connection, 8 pin of DS1302 chips are connected with handheld device anode, handheld device GND respectively with ground wire, DS1302
4 pin of chip are connected, and 2 pin of DS1302 chips are connected by crystal oscillator with 3 pin of DS1302 chips, 6 pin point of DS1302 chips
It is not connected with the resistance R12 other ends, 100 Ohmic resistance one end, the 100 Ohmic resistance other ends are connected with U4 17 pin.
U4 18 pin are connected with resistance R15 one end, electric capacity C8 one end respectively by resistance R16, electric capacity C8 other ends ground connection,
Another termination SYS_VCC_3.3V power ends of resistance R15.
U4 20 pin are connected with 7 pin of REF24L01 chips, 1 pin of REF24L01 chips respectively with REF24L01 chips
2 pin, SYS_VCC_3.3V power ends, electric capacity C5 one end, electric capacity C1 one end are connected, and the electric capacity C1 other ends are another with electric capacity C5 respectively
End, ground wire are connected；1,44 pin of 18,19 pin of REF24L01 chips respectively with U4 are corresponding to be connected.
U4 21 pin are connected with 7 pin of DS1302 chips, U4 25~27,32,35,38~41 pin and B12864 model liquid
6~4,15,16,7~10 pin of crystalline substance screen are corresponding to be connected；20 pin of B12864 model liquid crystal displays respectively with electric capacity C4 one end, electric capacity
C20 one end, 1 pin, the ground wire of B12864 model liquid crystal displays are connected, the electric capacity C4 other ends respectively with B12864 model liquid crystal displays 2
Pin, SYS_VCC_3.3V power ends, rheostat R17 one end, resistance R14 one end, 19 pin of B12864 model liquid crystal displays are connected, and become
Resistance device R17 struck sides are connected with 3 pin of B12864 model liquid crystal displays, the rheostat R17 other ends and B12864 model liquid crystal displays
18 pin are connected, and 17 pin of the resistance R14 other ends respectively with the electric capacity C20 other ends, B12864 model liquid crystal displays are connected.
U4 36 pin are connected with the pin of M25P128 chips 7, and U4 37 pin are connected with the pin of M25P128 chips 16, U4 42 pin with
The pin of M25P128 chips 8 is connected, and U4 43 pin are connected with the pin of M25P128 chips 15；The pin of M25P128 chips 1 respectively with SYS_VCC_
3.3V power ends, the pin of M25P128 chips 2, electric capacity C16 one end are connected, electric capacity C16 other ends ground connection；The pin point of M25P128 chips 10
Be not connected with ground wire, electric capacity C17 one end, the electric capacity C17 other ends respectively with the pin of M25P128 chips 9, SYS_VCC_3.3V power ends
It is connected.
SYS_VCC_3.3V power ends respectively with green light LED DS1 anodes, electric capacity C11 one end, electric capacity C3 positive poles,
Electric capacity C2 positive poles, electric capacity C9 one end, LM117 chips U2 2 pin are connected, U2 3 pin respectively with electric capacity C10 one end, handheld device
Anode, charging inlet positive pole are connected, charging inlet negative pole respectively with handheld device GND, the electric capacity C10 other ends, U2
1 pin, the electric capacity C9 other ends, electric capacity C2 negative poles, electric capacity C3 negative poles, the electric capacity C11 other ends, resistance R5 one end be connected, resistance R5
Other end sending and receiving optical diode DS1 negative electrodes.
U4 28 pin are connected with SYS_VCC_3.3V power ends, electric capacity C21 one end respectively, the electric capacity C21 other ends respectively with
Ground wire, U4 29 pin are connected；U4 30 pin are connected with 16M crystal oscillators one end, electric capacity C7 one end respectively, the electric capacity C7 other ends respectively with
Ground wire, electric capacity C6 one end are connected, and 31 pin of the electric capacity C6 other ends respectively with the 16M crystal oscillators other end, U4 are connected.
In addition, Key pad port K1 described in the utility model presses with digital 9 button one end, digital 0 button one end, No. * respectively
Key one end, buttons one end are connected, Key pad port K2 respectively with digital 5 button one end, digital 6 button one end, digital 7 buttons
One end, digital 8 button one end are connected, and Key pad port K3 presses with digital 10 button one end, digital 11 button one end, numeral 12 respectively
Key one end, digital 13 button one end are connected, Key pad port K4 respectively with ok symbol keys one end, menu symbol keys one end,
Cancel symbol keys one end, return symbol keys one end are connected, Key pad port K5 respectively with digital up symbol keys one end,
Down symbol keys one end, left symbol keys one end, right symbol keys one end are connected.
Key pad port K6 is another with the digital up symbol keys other end, the ok symbol keys other end, digital 1 button respectively
End, the digital 5 button other ends, the digital 9 button other ends are connected, and Key pad port K7 is another with digital down symbol keys respectively
End, the menu symbol keys other end, the digital 2 button other ends, the digital 6 button other ends, the digital 0 button other end are connected, and press
Key port K8 respectively with the digital left symbol keys other end, the cancel symbol keys other end, the digital 3 button other ends, number
The button other end of word 7, the * button other ends are connected, Key pad port K9 respectively with the digital right symbol keys other end,
The return symbol keys other end, the digital 4 button other ends, the digital 8 button other ends, the button other ends are connected.
The utility model beneficial effect.
The utility model can fill with wireless measurement terminal with the use of composition HVDC pressure test General Current measurement
Put.HVDC pressure test General Current measurement apparatus is developed in high-potting based on wireless DC current measurement technology
General microampere order direct-current measuring device, the measurement occasion of all HVDC TESTs can be applied to, utilize radio communication skill
For art in the real-time teletransmission of data to handheld device, convenient experiment also protects personal safety.The utility model have studied high pressure
The mechanism of direct current microampere order current measurement techniques and HVDC discharge impact, and design the protection circuit of correlation.It has developed base
In communication and the handheld device of measurement apparatus data can be read in real time, it is resistance to ultimately form a kind of general direct current
Current measuring device in pressure experiment.
The utility model realizes the power equipment of each voltage class in HVDC pressure test, can use a kind of logical
Current measurement techniques, new wireless direct-current measuring device is provided for the experiment of each power equipment DC break down voltage.
The utility model wireless measurement terminal is connected on high-voltage D.C. generator and test product（Power equipment）Between, Ke Yishi
When measurement high-voltage D.C. generator be applied to the current value of power equipment, and can be by communication measurement data
Teletransmission is in handheld device.Handheld device of the radio hand-held equipment with LCDs can show wireless measurement in real time
DC current values measured by terminal, and with functions such as arrange parameter and data storages.Wireless measurement terminal is set with hand-held
Between standby the transmission means of zigbee less radio-frequencies can be used to carry out data interaction.
The utility model wireless measurement terminal, the D. C. value for being applied to power equipment can be accurately measured, and had
There are measurement and protection both of which, measurement pattern can carry out the real-time measurement of DC current；Protected mode can be measurement eventually
The electronic surveying part at end carries out bypass protection, and the dash current of experiment can be released to the earth by bypass, so as to not damage
The internal electronics of measuring terminals.Handheld device and measuring terminals carry out data interaction by less radio-frequency, not only realize
Electrical isolation, operating personnel's personal safety is protected, and avoid the difficulty of artificial remote reading evidence.Handheld device can
Record multigroup measurement data and background computer can be wirelessly transmitted to, be easy to data processing.
The utility model utilizes wireless radio-frequency, has reached the electrical isolation of operating personnel and high-tension testing apparatus；This
Utility model can read the current measurement data that handheld device is received on the spot, more intuitively.
The DC current applied in experiment enters measuring terminals internal measurement circuit, can be being applied to test product equipment
DC current values are measured, and by communication teletransmission into handheld device 2, the LCDs in handheld device can
With real-time display measurement result.Current application model can be changed by button, and current time, data storage can be set
Numbering etc..
Brief description of the drawings
The utility model is described further with reference to the accompanying drawings and detailed description.Scope of protection of the utility model
It is not only limited to the statement of herein below.
Fig. 1 is the utility model use state figure.
Fig. 2,3 are the utility model handset structure schematic diagrames.
Fig. 4 is the utility model measuring terminals structural representation.
Fig. 5~8 are the utility model measuring terminals circuit theory diagrams.
Fig. 9~14 are the utility model handheld device circuit theory diagrams.
Embodiment
As illustrated, the utility model can be with wireless measurement terminal with the use of the composition general electricity of HVDC pressure test
Flow measuring apparatus.HVDC pressure test General Current measurement apparatus includes wireless measurement terminal 1 and handheld device 2, holds
Equipment includes shell 3, and button 4, liquid crystal display 5 and charging inlet 13 are provided with shell 3, and handheld device electricity is provided with shell 3
Pond 6, handheld device antenna 7, LCD Interface 8, handheld device MCU9, storage circuit 10, handheld device wireless communication module 11
With real time clock circuit 12；MCU9 respectively with storage circuit 10, handheld device wireless communication module 11, real time clock circuit 12,
Button 4 is connected, and MCU9 is connected by LCD Interface 8 with liquid crystal display 5, handheld device wireless communication module 11 and handheld device day
Line 7 is connected, and handheld device battery 6 is connected with charging inlet 13.
The measuring terminals include measuring terminals shell 15 and DC generator spare interface 27, on measuring terminals shell 15
It is provided with antenna 14, testing current line interface 17, power supply indicator 18, protection indicator lamp 19, DC generator interface 20, electric current
Test line interface 17 is connected with testing current lead 16, and testing current lead 16 connects test product；It is provided with measuring terminals shell 15
Measuring terminals wireless module 21, sampling resistor 22, current measurement circuit 23, protective relay 24, measuring terminals MCU25 and measurement
End cell 26, measuring terminals device antenna 14 connect measuring terminals wireless module 21, the connection sampling of testing current line interface 17
Resistance 22, sampling resistor 22 are connected by current measurement circuit 23 with measuring terminals MCU25, the control terminal of protective relay 24 with
The control signal output with MCU25, protection indicator lamp 19 are connected measuring terminals respectively, and DC generator interface 20 is connected to height
The output end of straightening flow-generator；Measuring terminals wireless module 21 is connected on the MCU25 of measuring terminals data-interface.
The shell of the handheld device uses engineering plastics shell, and button is to adopt using PVC film button, LCDs
With 128 × 64 dot matrix display screens.
The handheld device wireless communication module 11 is controlled by handheld device MCU9, and reading measurement is sent eventually according to the 2S times
The order at end 1, and the message of the measurement data sent by wireless receiving measuring terminals 1, are subsequently sent to handheld device
MCU9 carries out data processing.
Handheld device MCU9 reads the time of real-time clock by Peripheral Interface, then timestamp plus calculating gained
DC current data are deposited into memory together, conveniently inquire about the data result tested each time.
The measuring terminals shell 15 is cast aluminium material shell.
The DC generator interface 20 is M8 internal thread interface, and the one end of DC generator spare interface 27 is the outer of M8
Threaded post, the other end are magnet.If the mounting structure using plane of the output end of individual other high-voltage D.C. generator.Then design
DC generator spare interface 27, the external thread column that processing one end is M8, the direct current that can be mounted directly to measuring terminals 1 occur
At device interface 20, the other end uses high-performance magnet, the completely reliable DC generator output end adsorbed in planar structure, reaches
To the purpose of the generally applicable installation of measuring terminals.
The measuring terminals 1 use two kinds of application models：Protected mode and measurement pattern, both of which pass through handheld device
2 are set；When measuring terminals 1 are using in protected mode, protective relay is carried out adhesive action by MCU25 control, electricity
Road measuring circuit 23 carries out short circuit, and DC current is switched in test loop, serves the protective effect of heavy current impact；When
In measurement mode, protective relay is carried out opening action to the application of measuring terminals 1 by MCU25 control, and DC circuit introduces
Into sampling resistor 22, current measurement circuit 23 is sent into after I/V transforms to DC voltage, then it is laggard by signal enhanced processing
Enter to A/D inside measuring terminals MCU25, obtain accurate DC current measurement data by calculating analysis, MCU25 sends data
To measuring terminals wireless module 21, wireless module 21 sends wireless data packet into handheld device 2, is measured using liquid crystal display
The real-time display of data.
The measuring terminals battery 26 uses 3.7V rechargeable batteries.
The measuring terminals MCU25 uses PIC18F25K80 chip U3, and measuring terminals wireless module 21 uses REF24L01
Chip, current measurement circuit use AD8603 chips, and power supply indicator is green light LED DS1, protection indicator lamp is red
Light-emitting diode DS2.
U3 1 pin is connected with resistance R7 one end, electric capacity C20 one end respectively by resistance R9, another termination SYS_ of resistance R7
VCC_3.3V power ends, electric capacity C20 the first ground wires of another termination；U3 2 pin respectively with resistance R30 one end, resistance R31 one end,
Electric capacity C30 one end is connected, the resistance R30 other ends 3 pin with XC6206 chips U1, electric capacity C2 one end, the 5 of PS3120 chips respectively
Pin, electric capacity C16 one end, resistance R4 one end, electric capacity C14 one end, switch S1 one end are connected；The electric capacity C2 other ends respectively with the first ground
Line, the electric capacity C16 other ends, the electric capacity C14 other ends, 2 pin of PS3120 chips, electric capacity C15 one end, measuring terminals GND phase
Even；Measuring terminals anode connect switch the S1 other ends, the electric capacity C15 other ends respectively with SYS_VCC_5V power ends, PS3120
The pin of chip 1 is connected；Another pin of termination PS3120 chips 3 of resistance R4.
The electric capacity C30 other ends respectively with the first ground wire, the resistance R31 other ends, U1 1 pin, electric capacity C1 one end, resistance R5 mono-
End, electric capacity C13 one end, resistance R3 one end are connected, and the resistance R5 other ends are connected with light emitting diode DS1 negative electrodes, light emitting diode
DS1 anodes 2 pin with U1, the electric capacity C1 other ends, SYS_VCC_3.3V power ends, resistance R1 one end, the electric capacity C13 other ends respectively
It is connected；The resistance R1 other ends are connected with electric capacity C6 one end, SYS_AVCC_3.3V power ends, electric capacity C5 one end respectively, and electric capacity C5 is another
One end is connected with the second ground wire, the electric capacity C6 other ends, the resistance R3 other ends respectively.
U3 3 pin are connected with 1 pin of AD8603 chips, and 2 pin of AD8603 chips connect the second ground wire, and the 5 of AD8603 chips
Pin is connected with electric capacity C7 one end, electric capacity C23 one end, resistance R6 one end respectively, and the electric capacity C7 other ends are another with electric capacity C23 respectively
End, the second ground wire are connected, another termination SYS_AVCC_3.3V power ends of resistance R6；4 pin of AD8603 chips respectively with electric capacity C9
One end, resistance R12 one end are connected, and 3 pin of the electric capacity C9 other ends respectively with resistance R14 one end, AD8603 chips are connected, resistance
The R12 other ends are connected with resistance R13 one end, electric capacity C10 one end, first inductance one end respectively, the resistance R14 other ends respectively with electricity
The resistance R13 other ends, resistance R15 one end, the electric capacity C10 other ends, second inductance one end are connected, another termination REF2.0V of resistance R15
Power end；The first inductance other end respectively with BC301 discharge tube G1 one end, the normally closed points of protective relay K1, resistance R21 one end,
Resistance R20 one end, test product are connected；The second inductance other end is normally opened with the BC301 discharge tube G1 other ends, protective relay K1 respectively
Point be connected, protective relay K1 struck sides respectively with the resistance R21 other ends, the resistance R20 other ends, high-voltage D.C. generator positive pole
It is connected.
Protective relay K1 control terminals one end is cloudy with SYS_VCC_5V power supplys, 750 Ohmic resistance one end, diode D1 respectively
Pole, optocoupler output colelctor electrode are connected, and the 750 Ohmic resistance other ends are connected with diode DS2 anodes, diode DS2 negative electrodes point
Not with diode D1 anodes, NPN triode Q1 colelctor electrode, the protective relay K1 control terminals other end, NPN triode Q2 colelctor electrodes
It is connected, NPN triode Q2 base stages are connected with NPN triode Q1 emitter stage, 10K Ohmic resistances one end respectively, and 10K Ohmic resistances are another
One end is connected with the first ground wire, NPN triode Q2 emitter stages, resistance R17 one end respectively, and NPN triode Q1 base stage passes through resistance
R16 is connected with optocoupler output emitter stage, and optocoupler input light-emitting diodes tube cathode is connected with the resistance R17 other ends, and optocoupler is defeated
Enter to hold light-emitting diodes tube anode to be connected with U3 12 pin.
U3 6 pin are connected by 8 pin of the electric capacity C24 respectively with the first ground wire, U3, U3 9 pin respectively with crystal oscillator Y1 one end,
Electric capacity C21 one end is connected, and the electric capacity C21 other ends are connected with the first ground wire, electric capacity C22 one end respectively, electric capacity C22 other ends difference
It is connected with the crystal oscillator Y1 other ends, U3 10 pin.
U3 17 pin are connected with 19 pin of REF24L01 chips, and U3 18 pin are connected with 18 pin of REF24L01 chips, U3
19 pin be connected respectively with the first ground wire, electric capacity C25 one end, the electric capacity C25 other ends 20 pin, the SYS_VCC_3.3V with U3 respectively
Power end is connected.
1 pin of REF24L01 chips, 2 pin, SYS_VCC_3.3V power ends, electric capacity C19 mono- with REF24L01 chips respectively
End, electric capacity C18 one end are connected, and the electric capacity C18 other ends are connected with the electric capacity C19 other ends, the first ground wire respectively；SYS_AVCC_
3.3V power ends are connected with electric capacity C3 one end, the pin of LM117-2.0 chips 1 respectively by resistance R2, the electric capacity C3 other ends respectively with
Second ground wire, the pin of LM117-2.0 chips 3, electric capacity C4 one end are connected, the electric capacity C4 other ends respectively with the pin of LM117-2.0 chips 2,
REF2.0V power ends are connected.
The handheld device MCU uses C8051F002 chip U4, and real time clock circuit uses DS1302 chips, hand-held to set
Standby wireless communication module uses REF24L01 chips, and storage circuit uses M25P128 chips, and liquid crystal display uses B12864 model liquid
Crystalline substance screen.
U4 1 pin is connected with the pin of REF24L01 chips 18, U4 2~5 pin respectively with the 11 of B12864 model liquid crystal displays~
14 pin are corresponding to be connected, and U4 6 pin are connected with ground wire, electric capacity C19 one end respectively, the electric capacity C19 other ends respectively with SYS_VCC_
3.3V power ends, U4 7 pin are connected, U4 8~11,14,15,22~24 connections corresponding with Key pad port K1~K9 respectively；U4
5 pin of 16 pin respectively with resistance R11 one end, DS1302 chips be connected, the resistance R11 other ends respectively with resistance R10 one end,
SYS_VCC_3.3V power ends, electric capacity C18 one end, resistance R12 one end, 1 pin of DS1302 chips are connected, the electric capacity C18 other ends
Ground connection, 8 pin of DS1302 chips are connected with handheld device anode, handheld device GND respectively with ground wire, DS1302
4 pin of chip are connected, and 2 pin of DS1302 chips are connected by crystal oscillator with 3 pin of DS1302 chips, 6 pin point of DS1302 chips
It is not connected with the resistance R12 other ends, 100 Ohmic resistance one end, the 100 Ohmic resistance other ends are connected with U4 17 pin.
U4 18 pin are connected with resistance R15 one end, electric capacity C8 one end respectively by resistance R16, electric capacity C8 other ends ground connection,
Another termination SYS_VCC_3.3V power ends of resistance R15.
U4 20 pin are connected with 7 pin of REF24L01 chips, 1 pin of REF24L01 chips respectively with REF24L01 chips
2 pin, SYS_VCC_3.3V power ends, electric capacity C5 one end, electric capacity C1 one end are connected, and the electric capacity C1 other ends are another with electric capacity C5 respectively
End, ground wire are connected；1,44 pin of 18,19 pin of REF24L01 chips respectively with U4 are corresponding to be connected.
U4 21 pin are connected with 7 pin of DS1302 chips, U4 25~27,32,35,38~41 pin and B12864 model liquid
6~4,15,16,7~10 pin of crystalline substance screen are corresponding to be connected；20 pin of B12864 model liquid crystal displays respectively with electric capacity C4 one end, electric capacity
C20 one end, 1 pin, the ground wire of B12864 model liquid crystal displays are connected, the electric capacity C4 other ends respectively with B12864 model liquid crystal displays 2
Pin, SYS_VCC_3.3V power ends, rheostat R17 one end, resistance R14 one end, 19 pin of B12864 model liquid crystal displays are connected, and become
Resistance device R17 struck sides are connected with 3 pin of B12864 model liquid crystal displays, the rheostat R17 other ends and B12864 model liquid crystal displays
18 pin are connected, and 17 pin of the resistance R14 other ends respectively with the electric capacity C20 other ends, B12864 model liquid crystal displays are connected.
U4 36 pin are connected with the pin of M25P128 chips 7, and U4 37 pin are connected with the pin of M25P128 chips 16, U4 42 pin with
The pin of M25P128 chips 8 is connected, and U4 43 pin are connected with the pin of M25P128 chips 15；The pin of M25P128 chips 1 respectively with SYS_VCC_
3.3V power ends, the pin of M25P128 chips 2, electric capacity C16 one end are connected, electric capacity C16 other ends ground connection；The pin point of M25P128 chips 10
Be not connected with ground wire, electric capacity C17 one end, the electric capacity C17 other ends respectively with the pin of M25P128 chips 9, SYS_VCC_3.3V power ends
It is connected.
SYS_VCC_3.3V power ends respectively with green light LED DS1 anodes, electric capacity C11 one end, electric capacity C3 positive poles,
Electric capacity C2 positive poles, electric capacity C9 one end, LM117 chips U2 2 pin are connected, U2 3 pin respectively with electric capacity C10 one end, handheld device
Anode, charging inlet positive pole are connected, charging inlet negative pole respectively with handheld device GND, the electric capacity C10 other ends, U2
1 pin, the electric capacity C9 other ends, electric capacity C2 negative poles, electric capacity C3 negative poles, the electric capacity C11 other ends, resistance R5 one end be connected, resistance R5
Other end sending and receiving optical diode DS1 negative electrodes.
U4 28 pin are connected with SYS_VCC_3.3V power ends, electric capacity C21 one end respectively, the electric capacity C21 other ends respectively with
Ground wire, U4 29 pin are connected；U4 30 pin are connected with 16M crystal oscillators one end, electric capacity C7 one end respectively, the electric capacity C7 other ends respectively with
Ground wire, electric capacity C6 one end are connected, and 31 pin of the electric capacity C6 other ends respectively with the 16M crystal oscillators other end, U4 are connected.
The Key pad port K1 respectively with digital 9 button one end, digital 0 button one end, * buttons one end, buttons one
End is connected, Key pad port K2 respectively with digital 5 button one end, digital 6 button one end, digital 7 button one end, digital 8 buttons one
End is connected, and Key pad port K3 presses with digital 10 button one end, digital 11 button one end, digital 12 button one end, numeral 13 respectively
Key one end is connected, Key pad port K4 respectively with ok symbol keys one end, menu symbol keys one end, cancel symbol keys one
End, return symbol keys one end be connected, Key pad port K5 respectively with digital up symbol keys one end, down symbol keys one
End, left symbol keys one end, right symbol keys one end are connected.
Key pad port K6 is another with the digital up symbol keys other end, the ok symbol keys other end, digital 1 button respectively
End, the digital 5 button other ends, the digital 9 button other ends are connected, and Key pad port K7 is another with digital down symbol keys respectively
End, the menu symbol keys other end, the digital 2 button other ends, the digital 6 button other ends, the digital 0 button other end are connected, and press
Key port K8 respectively with the digital left symbol keys other end, the cancel symbol keys other end, the digital 3 button other ends, number
The button other end of word 7, the * button other ends are connected, Key pad port K9 respectively with the digital right symbol keys other end,
The return symbol keys other end, the digital 4 button other ends, the digital 8 button other ends, the button other ends are connected.
As shown in figure 5, it is protected mode that K1, which pushes 6 ends, K1 is controlled by MCU, gathers electricity equivalent to rear end during adhesive
Roadside road, directly high current is introduced in primary circuit during rush of current.Upon release, the electric current of application can flow through measurement electricity
Road finally measures.Signal is come in from input 1, is depressured by R13, then is flowed out from input 2 into test product, test R13 electricity
Both ends differential signal is pressed, measures electric current.By controlling K1, measuring terminals possess the double-mode of measurement and protection, can avoided
Interference and damage of the impact to electronic surveying part in DC experiment.
PGD, PGC port are the port to download.
BC301 discharge tube starting voltage surge protection acts on, and L1 plays electric current surge protection.
It is understood that above with respect to specific descriptions of the present utility model, it is merely to illustrate the utility model and is not
The technical scheme described by the utility model embodiment is limited to, it will be understood by those within the art that, still can be with
The utility model is modified or equivalent substitution, to reach identical technique effect；As long as satisfaction uses needs, all in this reality
Within new protection domain.
Claims (4)
1. hand-held measuring apparatus, including shell（3）, it is characterised in that shell（3）On be provided with button（4）, liquid crystal display（5）With fill
Electrical interface（13）, shell（3）Inside it is provided with handheld device battery（6）, handheld device antenna（7）, LCD Interface（8）, it is hand-held
Equipment MCU（9）, storage circuit（10）, handheld device wireless communication module（11）And real time clock circuit（12）；MCU（9）Respectively
With storage circuit（10）, handheld device wireless communication module（11）, real time clock circuit（12）, button（4）It is connected, MCU（9）It is logical
Cross LCD Interface（8）With liquid crystal display（5）It is connected, handheld device wireless communication module（11）With handheld device antenna（7）It is connected,
Handheld device battery（6）With charging inlet（13）It is connected.
2. measuring apparatus is held according to claim 1, it is characterised in that the shell uses engineering plastics shell, and button is adopted
It is to use 128 × 64 dot matrix display screens with PVC film button, LCDs.
3. measuring apparatus is held according to claim 1, it is characterised in that the handheld device MCU uses C8051F002 cores
Piece U4, real time clock circuit use DS1302 chips, and handheld device wireless communication module uses REF24L01 chips, storage circuit
Using M25P128 chips, liquid crystal display uses B12864 model liquid crystal displays；
U4 1 pin is connected with the pin of REF24L01 chips 18, U4 2~5 pin 11~14 pin with B12864 model liquid crystal displays respectively
Corresponding to be connected, U4 6 pin are connected with ground wire, electric capacity C19 one end respectively, and the electric capacity C19 other ends are electric with SYS_VCC_3.3V respectively
Source, U4 7 pin are connected, U4 8~11,14,15,22~24 connections corresponding with Key pad port K1~K9 respectively；U4 16 pin
5 pin with resistance R11 one end, DS1302 chips are connected respectively, the resistance R11 other ends respectively with resistance R10 one end, SYS_VCC_
3.3V power ends, electric capacity C18 one end, resistance R12 one end, 1 pin of DS1302 chips are connected, electric capacity C18 other ends ground connection,
8 pin of DS1302 chips are connected with handheld device anode, handheld device GND respectively with ground wire, DS1302 chips
4 pin are connected, and 2 pin of DS1302 chips are connected by crystal oscillator with 3 pin of DS1302 chips, 6 pin of DS1302 chips respectively with electricity
The resistance R12 other ends, 100 Ohmic resistance one end are connected, and the 100 Ohmic resistance other ends are connected with U4 17 pin；
U4 18 pin are connected with resistance R15 one end, electric capacity C8 one end respectively by resistance R16, electric capacity C8 other ends ground connection, resistance
Another termination SYS_VCC_3.3V power ends of R15；
U4 20 pin are connected with 7 pin of REF24L01 chips, 1 pin of REF24L01 chips respectively 2 pin with REF24L01 chips,
SYS_VCC_3.3V power ends, electric capacity C5 one end, electric capacity C1 one end are connected, the electric capacity C1 other ends respectively with the electric capacity C5 other ends,
Ground wire is connected；1,44 pin of 18,19 pin of REF24L01 chips respectively with U4 are corresponding to be connected；
U4 21 pin are connected with 7 pin of DS1302 chips, U4 25~27,32,35,38~41 pin and B12864 model liquid crystal displays
6~4,15,16,7~10 pin corresponding connect；20 pin of B12864 model liquid crystal displays respectively with electric capacity C4 one end, electric capacity C20 mono-
End, 1 pin, the ground wire of B12864 model liquid crystal displays be connected, the electric capacity C4 other ends respectively 2 pin with B12864 model liquid crystal displays,
SYS_VCC_3.3V power ends, rheostat R17 one end, resistance R14 one end, 19 pin of B12864 model liquid crystal displays are connected, variable resistance
Device R17 struck sides are connected with 3 pin of B12864 model liquid crystal displays, the rheostat R17 other ends and the 18 of B12864 model liquid crystal displays
Pin is connected, and 17 pin of the resistance R14 other ends respectively with the electric capacity C20 other ends, B12864 model liquid crystal displays are connected；
U4 36 pin are connected with the pin of M25P128 chips 7, and U4 37 pin are connected with the pin of M25P128 chips 16, U4 42 pin with
The pin of M25P128 chips 8 is connected, and U4 43 pin are connected with the pin of M25P128 chips 15；The pin of M25P128 chips 1 respectively with SYS_VCC_
3.3V power ends, the pin of M25P128 chips 2, electric capacity C16 one end are connected, electric capacity C16 other ends ground connection；The pin point of M25P128 chips 10
Be not connected with ground wire, electric capacity C17 one end, the electric capacity C17 other ends respectively with the pin of M25P128 chips 9, SYS_VCC_3.3V power ends
It is connected；
SYS_VCC_3.3V power ends respectively with green light LED DS1 anodes, electric capacity C11 one end, electric capacity C3 positive poles, electric capacity
C2 positive poles, electric capacity C9 one end, LM117 chips U2 2 pin are connected, U2 3 pin respectively with electric capacity C10 one end, handheld device battery
Positive pole, charging inlet positive pole are connected, charging inlet negative pole respectively with handheld device GND, the electric capacity C10 other ends, U2 1
Pin, the electric capacity C9 other ends, electric capacity C2 negative poles, electric capacity C3 negative poles, the electric capacity C11 other ends, resistance R5 one end are connected, and resistance R5 is another
Terminate light emitting diode DS1 negative electrodes；
U4 28 pin are connected with SYS_VCC_3.3V power ends, electric capacity C21 one end respectively, the electric capacity C21 other ends respectively with ground wire,
U4 29 pin are connected；U4 30 pin are connected with 16M crystal oscillators one end, electric capacity C7 one end respectively, the electric capacity C7 other ends respectively with ground wire,
Electric capacity C6 one end is connected, and 31 pin of the electric capacity C6 other ends respectively with the 16M crystal oscillators other end, U4 are connected.
4. hold measuring apparatus according to claim 3, it is characterised in that the Key pad port K1 respectively with digital 9 buttons one
End, digital 0 button one end, * buttons one end, buttons one end are connected, Key pad port K2 respectively with digital 5 button one end, number
The button one end of word 6, digital 7 button one end, digital 8 button one end be connected, Key pad port K3 respectively with digital 10 button one end,
Digital 11 button one end, digital 12 button one end, digital 13 button one end are connected, Key pad port K4 respectively with ok symbol keys one
End, menu symbol keys one end, cancel symbol keys one end, return symbol keys one end are connected, Key pad port K5 difference
It is connected with digital up symbol keys one end, down symbol keys one end, left symbol keys one end, right symbol keys one end；
Key pad port K6 respectively with the digital up symbol keys other end, the ok symbol keys other end, the digital 1 button other end, number
The button other end of word 5, the digital 9 button other ends are connected, Key pad port K7 respectively with the digital down symbol keys other end, menu
The symbol keys other end, the digital 2 button other ends, the digital 6 button other ends, the digital 0 button other end are connected, Key pad port K8
It is another with the digital left symbol keys other end, the cancel symbol keys other end, the digital 3 button other ends, digital 7 buttons respectively
One end, the * button other ends are connected, Key pad port K9 respectively with the digital right symbol keys other end, return symbol keys
The other end, the digital 4 button other ends, the digital 8 button other ends, the button other ends are connected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720661821.9U CN206876806U (en) | 2017-06-08 | 2017-06-08 | Hand-held measuring apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720661821.9U CN206876806U (en) | 2017-06-08 | 2017-06-08 | Hand-held measuring apparatus |
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| CN206876806U true CN206876806U (en) | 2018-01-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108572618A (en) * | 2018-07-11 | 2018-09-25 | 国网江苏省电力有限公司太仓市供电分公司 | A kind of hand-held control terminal |
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2017
- 2017-06-08 CN CN201720661821.9U patent/CN206876806U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108572618A (en) * | 2018-07-11 | 2018-09-25 | 国网江苏省电力有限公司太仓市供电分公司 | A kind of hand-held control terminal |
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