CN206847546U - Digital display range unit - Google Patents
Digital display range unit Download PDFInfo
- Publication number
- CN206847546U CN206847546U CN201720814127.6U CN201720814127U CN206847546U CN 206847546 U CN206847546 U CN 206847546U CN 201720814127 U CN201720814127 U CN 201720814127U CN 206847546 U CN206847546 U CN 206847546U
- Authority
- CN
- China
- Prior art keywords
- digital display
- voltage
- rechargeable battery
- terminal regulator
- range unit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a kind of digital display range unit, is made up of ranging main frame and power supply adaptor：By rechargeable battery powered, digital display meter is provided with charging inlet and matched with power supply adaptor charging connector the internal circuit of the digital display meter of ranging main frame；The internal circuit of power supply adaptor is：Step-down transformer primary incoming transport civil power, rectification circuit is connected to the secondary of step-down transformer, output end is connected to the voltage input end of three terminal regulator through diode D5, output voltage terminates the positive pole of rechargeable battery, voltage-regulation end connects the negative pole of rechargeable battery through resistance R2, resistance R1 is connected between voltage-regulation end and output voltage terminal, electric capacity C1 is connected between voltage input end and ground, NPN type triode T1 colelctor electrode connects voltage-regulation end, T1 grounded emitter, T1 base stage connects the negative pole of rechargeable battery through resistance R3, and negative pole is grounded through resistance R4.The utility model digital display range unit can improve simple operation.
Description
Technical field
It the utility model is related to measuring instrument, more particularly to a kind of digital display range unit.
Background technology
Digital display range unit is a kind of common measuring instrument, and it is configured with sensor to detect and export sign sensor
To the voltage signal of workpiece distance, sensor is obtained to work after the amplification of digital display meter internal circuit, analog-to-digital conversion, data processing
Part distance, its data are directly read through display driver circuit driving from display screen.Existing digital display range unit exists certain
Defect, for the internal circuit of digital display meter by No. 5 dry cell power supplies, it is necessary to often change dry cell, it is not convenient enough to use.
Utility model content
The defects of for prior art, the utility model purpose are to provide a kind of digital display range unit, to improve behaviour
Make convenience.
To solve above technical problem, the technical solution of the utility model provides a kind of digital display range unit, by ranging master
Machine and power supply adaptor are formed, wherein：By rechargeable battery powered, digital display meter is provided with the internal circuit of the digital display meter of ranging main frame
Charging inlet matches with power supply adaptor charging connector；The internal circuit of power supply adaptor is：The primary of step-down transformer connects
Enter electric main, rectification circuit is connected to the secondary of step-down transformer, and it is steady that the output end of rectification circuit through diode D5 is connected to three ends
The voltage input end of depressor, the positive pole of the output voltage termination rechargeable battery of three terminal regulator, the voltage-regulation of three terminal regulator
End connects the negative pole of rechargeable battery through resistance R2, and resistance R1 is connected to voltage-regulation end and the output of three terminal regulator of three terminal regulator
Between voltage end, electric capacity C1 is connected between the voltage input end of three terminal regulator and ground, and NPN type triode T1 colelctor electrode connects three
The voltage-regulation end of voltage-stablizer, NPN type triode T1 grounded emitter are held, NPN type triode T1 base stage connects through resistance R3
The negative pole of rechargeable battery, the negative pole of rechargeable battery are grounded through resistance R4.
Compared with prior art, the digital display meter of the main frame of the utility model digital display range unit is configured with charging inlet, can
To be charged by external power adapter, without often changing battery, thus its simple operation can be improved.Especially
Ground, the external power adapter have the charging circuit of current limiting pressure-limiting, can be by digital display range unit charging current and electricity
Pressure is limited to protect digital display meter.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model digital display range unit；
Fig. 2 is the internal circuit schematic diagram of power supply adaptor in Fig. 1.
Embodiment
For the ease of understanding the utility model, it is described in detail below in conjunction with the accompanying drawings with specific embodiment.
Referring to Fig. 1, for the structural representation of the utility model digital display range unit.The digital display range unit includes ranging master
Machine 1 and power supply adaptor 2, wherein：Ranging main frame 1 includes digital display meter 11, and digital display meter 11 is equipped with detection bar 15, the head of measurement bar
Sensors configured 14, the internal circuit that sensor 14 is connected to digital display meter 11 carry out detection sensor to the distance of metal works.Its
Middle sensor 114 is preferably capacitance sensor, and it detects and exported the voltage signal for characterizing sensor to metal works distance, warp
Sensor is obtained to the data (electric capacity of metal works distance after the internal circuit amplification of digital display meter 5, analog-to-digital conversion, data processing
Change with distance change, voltage signal is related to the size of electric capacity, and distance is represented by after magnitude of voltage conversion), the data
Directly read through display driver circuit driving from display screen.More preferably, digital display meter 11 is configured with liquid crystal display 12 and some buttons
13, liquid crystal display 12 is directly shown the range reading measured, the operation such as button 13 can be switched, range swithching.This
In embodiment, signal amplification circuit, analog to digital conversion circuit, data processing circuit, the display driving electricity of the internal circuit of digital display meter 11
Road etc. can use a variety of available circuits, repeat no more
As shown in figure 1, the internal circuit of digital display meter 11 can be powered by rechargeable battery BT1 in the present embodiment.Counted for this
Aobvious table 11 is configured with charging inlet 16 (being preferably USB charging inlets), and the charging inlet 16 is configured with charge port protecting cover 17, does not fill
Charging inlet 16 is covered tightly when electric, charging inlet 16 is opened during charging and is filled to access the charging connector 24 of power supply adaptor 2
Electricity.
As shown in figure 1, external power adapter 2 can use conventional physical arrangement, it includes charger body 22, filled
Electrical equipment main body 22 sets plug 21 to access 220V civil powers, and it is (excellent that charger body 21 by charging wire 23 draws charging connector 24
Elect USB charging connectors as), charging connector 24 insert digital display meter 11 on charging inlet 16 after it is i.e. chargeable.Due to ranging main frame 1
Digital display meter 11 be configured with charging inlet 16, thus can be charged by external power adapter 2, therefore without often
Battery is changed, its simple operation can be improved.
In order to prevent the charging of digital display range unit from over-voltage and over-current problem occur, the utility model external power adapter 2 is matched somebody with somebody
The charging circuit for putting current limiting pressure-limiting carrys out the charging current of digital display meter 11 and voltage is limited, below to external power adapter 2
Internal circuit is described.
Referring to Fig. 2, for the internal circuit schematic diagram of power supply adaptor.The power supply adaptor has the charging electricity of current limiting pressure-limiting
Road, its specific circuit structure are：After plug 21 inserts socket (not shown), step-down transformer B1 primary incoming transport city
Electric (220V), rectification circuit (being preferably the rectifier bridge being formed by connecting by diode D1~D4 bridge-types) are connected to step-down transformer B1's
Secondary, the output end of rectification circuit are connected to three terminal regulator IC1 voltage input end Vin, three terminal regulator IC1 through diode D5
Output voltage terminal Vout connect rechargeable battery BT1 positive pole, three terminal regulator IC1 voltage-regulation end ADJ connects through resistance R2 to be filled
Battery BT1 negative pole, resistance R1 are connected to three terminal regulator IC1 voltage-regulation end ADJ and three terminal regulator IC1 output electricity
Between pressure side Vout, electric capacity C1 is connected between three terminal regulator IC1 voltage input end Vin and ground, NPN type triode T1 collection
Electrode meets three terminal regulator IC1 voltage-regulation end ADJ, NPN type triode T1 grounded emitter, NPN type triode T1's
Base stage connects rechargeable battery BT1 negative pole through resistance R3, and rechargeable battery BT1 negative pole is grounded through resistance R4.
Due to being provided with three terminal regulator IC1 in circuit, it can export stable voltage, thus for dead load
Electric current is also sufficiently stable, thus constitutes current limiting pressure-limiting charging circuit to charge battery BT1, so can be by being surveyed to digital display
Limited away from device charging current and voltage to protect digital display meter.
The component parameters of the present embodiment circuit can be：Transformer B1 is 220/8V AC transformers, and D1~D5 can be
1N4001, three terminal regulator IC1 type selecting are three-port variable voltage regulator CW317, T1 9013, and resistance R1 is 240 Ω, and resistance R2 is
1.1k Ω, resistance R3 are 100 Ω, and resistance R4 is 10 Ω..
Although the utility model is disclosed as above with preferred embodiment, its be not for limiting the utility model, it is any
Those skilled in the art are not being departed from spirit and scope of the present utility model, can make possible variation and modification, because
This scope of protection of the utility model should be defined by the scope that the utility model claims are defined.
Claims (5)
- A kind of 1. digital display range unit, it is characterised in that it is made up of ranging main frame and power supply adaptor, wherein：Ranging main frame For the internal circuit of digital display meter by rechargeable battery powered, digital display meter is provided with charging inlet and power supply adaptor charging connector phase Match somebody with somebody；The internal circuit of power supply adaptor is：The primary incoming transport civil power of step-down transformer, rectification circuit are connected to step-down transformer Secondary, the output end of rectification circuit is connected to the voltage input end of three terminal regulator, the output of three terminal regulator through diode D5 Voltage terminates the positive pole of rechargeable battery, and the voltage-regulation end of three terminal regulator meets the negative pole of rechargeable battery, resistance R1 through resistance R2 It is connected between the voltage-regulation end of three terminal regulator and the output voltage terminal of three terminal regulator, electric capacity C1 is connected to three terminal regulator Between voltage input end and ground, NPN type triode T1 colelctor electrode connects the voltage-regulation end of three terminal regulator, NPN type triode T1 grounded emitter, NPN type triode T1 base stage connect the negative pole of rechargeable battery through resistance R3, and the negative pole of rechargeable battery is through electricity Hinder R4 ground connection.
- 2. digital display range unit as claimed in claim 1, it is characterised in that three terminal regulator is three-port variable voltage regulator.
- 3. digital display range unit as claimed in claim 1, it is characterised in that rectification circuit is formed by connecting by four two poles Rectifier bridge.
- 4. digital display range unit as claimed in claim 1, it is characterised in that charging connector is to pass through charging wire and charger master The USB charging connectors of body connection, the plug of charger body configuration access 220V civil powers.
- 5. the digital display range unit as described in any one of Claims 1 to 4, it is characterised in that the internal circuit of digital display meter includes Signal amplification circuit, analog to digital conversion circuit, data processing circuit, display driver circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720814127.6U CN206847546U (en) | 2017-07-06 | 2017-07-06 | Digital display range unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720814127.6U CN206847546U (en) | 2017-07-06 | 2017-07-06 | Digital display range unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206847546U true CN206847546U (en) | 2018-01-05 |
Family
ID=60804415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720814127.6U Expired - Fee Related CN206847546U (en) | 2017-07-06 | 2017-07-06 | Digital display range unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206847546U (en) |
-
2017
- 2017-07-06 CN CN201720814127.6U patent/CN206847546U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180105 Termination date: 20180706 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |