CN209656785U - A kind of High-accuracy direct current resistance meter - Google Patents
A kind of High-accuracy direct current resistance meter Download PDFInfo
- Publication number
- CN209656785U CN209656785U CN201822162557.1U CN201822162557U CN209656785U CN 209656785 U CN209656785 U CN 209656785U CN 201822162557 U CN201822162557 U CN 201822162557U CN 209656785 U CN209656785 U CN 209656785U
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- China
- Prior art keywords
- plate module
- module
- energy plate
- gear driving
- direct current
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Abstract
The utility model relates to a kind of High-accuracy direct current resistance meters, including tester shell, tester circuit；The tester circuit includes power module, gear driving plate module, burst energy plate module, control plate module and display module；The gear driving plate module, burst energy plate module, display module are connected with control plate module respectively；The power module includes power panel and current regulator power supply, for providing power supply for tester circuit；The power module, gear driving plate module are sequentially connected in series with inductive load to be measured；The routed energy plate module is in parallel with inductive load to be measured.The utility model resistance meter precision is high, and can carry out pure property resistance and perceptual resistance test simultaneously.
Description
Technical field
The utility model relates to measuring instrument technology more particularly to a kind of High-accuracy direct current resistance meters.
Background technique
Market mostly uses this method of bridge measurement method more traditional, it is found out according to three known arm resistance values
Tested bridge arm electricity class value Rx, is limited, and it is machine by bridge arm measuring resistance precision and measure traverse line and current detector sensitivity
Tool shift, vulnerable to oxidation, influences measurement accuracy；And bridge method output voltage is constant.Test purely resistive resistance can satisfy requirement.
It will seem to the test of inductive load and take time and effort.
Utility model content
The technical problem to be solved by the present invention is to for the defects in the prior art, provide a kind of High-accuracy direct current
Resistance meter.
The technical scheme adopted by the utility model to solve the technical problem is as follows: a kind of High-accuracy direct current resistance meter,
Including tester shell, tester circuit；
The tester circuit includes power module, gear driving plate module, burst energy plate module, control plate module and display
Module；
The gear driving plate module, burst energy plate module, display module are connected with control plate module respectively；
The power module includes power panel and current regulator power supply, for providing power supply for tester circuit；
The power module, gear driving plate module are sequentially connected in series with inductive load to be measured；It is described it is routed can plate module with to
It is in parallel to survey inductive load.
According to the above scheme, the routed energy plate module includes voltage filter acquisition unit and reversed charge releasing unit；It is described
Reversed charge releasing unit in energy plate module of bursting, including 6 diode D1 to D6；D2 it is the sum of in parallel with D5 it is in parallel with D6 with D3 it
With connect respectively with D1, D4 again after series connection, form release channel, wherein D4 anode be connected with electric current cathode, the cathode of D1
It is connected with electric current anode；Voltage filter acquisition unit is filter capacitor in the routed energy plate module.
According to the above scheme, the control plate module is equipped with RS232/RS485 communication interface and USB flash disk data communication interface.
The beneficial effect that the utility model generates is: utility model device overcomes existing tester to inductive load
The defect that measuring accuracy is poor, takes time and effort.
Detailed description of the invention
Below in conjunction with accompanying drawings and embodiments, the utility model is described in further detail, in attached drawing:
Fig. 1 is the structural schematic diagram of the utility model embodiment；
Fig. 2 is the circuit diagram of the routed energy plate module of the utility model embodiment；
Fig. 3 is the circuit diagram of the utility model embodiment control plate module.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, with reference to embodiments, to this
Utility model is further elaborated.It should be appreciated that specific embodiment described herein is only to explain that this is practical new
Type is not used to limit the utility model.
As shown in Figure 1, a kind of High-accuracy direct current resistance meter, including test equipment one, p-wire are a set of.Tester
It is connect with p-wire by binding post.The test lead of every p-wire is furnished with test clip, more convenient to be directly connected to test product,
Including tester shell, tester circuit；
The tester circuit includes power module, gear driving plate module, burst energy plate module, control plate module and display
Module；
The gear driving plate module, burst energy plate module, display module are connected with control plate module respectively；
The power module includes power panel and current regulator power supply, for providing power supply for tester circuit；
The power module, gear driving plate module are sequentially connected in series with inductive load to be measured；It is described it is routed can plate module with to
It is in parallel to survey inductive load；
Gear drives plate module to receive the signal of control plate module, determines gear；Power module constant-current source export electric current by
Gear drives stepping control switching circuit control in plate module.When selecting different stalls, different stabling currents is exported；Example
Such as: 2.5 Ω grades of corresponding current value position 10A；5 Ω grades of corresponding current value position 5A；25 Ω grades is 1A；250 Ω grades is
100mA；2500 Ω grades is 10mA；25000 Ω grades is 1mA；When continuous current flows through tested inductive load, to inductive load into
Row charging makes the perceptual resistance value of load be converted into purely resistive, and generates stable voltage signal Vx, fixed according to kirchhoff electric current
Rule and Ohm's law can calculate the D.C. resistance of the electric current that Rx flows through and load.After measurement, load end can store one
Fixed reversed charge, can plate progress charge release by bursting.The sound that charge storage more how corresponding buzzer issues also more
Sharply.Anyway illustrate that charge release is completed without information ring sound.
Such as Fig. 2, energy plate module circuit of bursting is described as follows:
1, bursting can plate P5 connection control panel P3.
2, I+ in routed energy plate, is connected with external testing line current anode.
3, I- in routed energy plate, is connected with external testing line current cathode.
4, V+ in routed energy plate, is connected with external testing line voltage anode.
5, V- in routed energy plate, is connected with external testing line voltage cathode.
In routed energy plate, including 6 diode D1 to D6；The sum of the sum of D2 and D5 parallel connection and D3 and D6 parallel connection divide again after connecting
It does not connect with D1, D4, forms release channel
Power panel provides required power supply for High-accuracy direct current resistance meter.In the present embodiment, power unit designs altogether 4
Group output.It is bis- groups of 5V, mono- group of ± 15V and mono- group of 24V respectively.
Control panel module design has DS18B20 temperature acquisition chip that can monitor environment temperature in real time, is resistivity measurements
Temperature coefficient amendment is provided.
1. providing standard RS232 interface.
2. providing standard RS485 interface.
3. CAN bus is set in.
4. providing temperature-compensating.
5. collection voltages signal.(when voltage is greater than 2.5V, can be differentiated automatically, rear to carry out voltage acquisition)
6. acquiring current signal.
7. providing standard JTAG mouthfuls (scalable).
The circuit diagram of plate module is controlled as shown in figure 3, wherein controlling P10 in plate module is that 20P toggle switch is short by 30cm
Winding displacement is connect with P10 in driving plate module.6,8,10,12,14,16 feet in plate module are wherein controlled to be used to switch different adopt
Collect resistance, 18,20 feet carry out voltage gear selection with to U1.And output current value is equal to selected voltage divided by acquisition electricity at this time
Resistance.
The routed energy plate P5 of control plate module P3 connection, wherein 1 foot of P3 corresponds to the energy plate V+ that bursts, and 2 feet correspond to routed energy plate V-.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations all should belong to the protection scope of the appended claims for the utility model.
Claims (3)
1. a kind of High-accuracy direct current resistance meter, which is characterized in that including tester shell, tester circuit；
The tester circuit includes power module, gear driving plate module, energy plate module of bursting, control plate module and display mould
Block；
The gear driving plate module, burst energy plate module, display module are connected with control plate module respectively；
The power module includes power panel and current regulator power supply, for providing power supply for tester circuit；
The power module, gear driving plate module are sequentially connected in series with inductive load to be measured；The routed energy plate module and sense to be measured
Property load it is in parallel.
2. High-accuracy direct current resistance meter according to claim 1, which is characterized in that the routed energy plate module includes electricity
Filters pressing wave acquisition unit and reversed charge releasing unit；Reversed charge releasing unit in the routed energy plate module, including 6 two poles
Pipe D1 to D6；The sum of the sum of D2 and D5 parallel connection and D3 and D6 parallel connection are connected with D1, D4 respectively again after connecting, and form release channel,
Wherein, the anode of D4 is connected with electric current cathode, and the cathode of D1 is connected with electric current anode；Voltage filter is adopted in the routed energy plate module
Integrate unit as filter capacitor.
3. High-accuracy direct current resistance meter according to claim 1, which is characterized in that the control plate module is equipped with
RS232/RS485 communication interface and USB flash disk data communication interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822162557.1U CN209656785U (en) | 2018-12-23 | 2018-12-23 | A kind of High-accuracy direct current resistance meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822162557.1U CN209656785U (en) | 2018-12-23 | 2018-12-23 | A kind of High-accuracy direct current resistance meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209656785U true CN209656785U (en) | 2019-11-19 |
Family
ID=68518325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822162557.1U Expired - Fee Related CN209656785U (en) | 2018-12-23 | 2018-12-23 | A kind of High-accuracy direct current resistance meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209656785U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109557377A (en) * | 2018-12-23 | 2019-04-02 | 武汉职业技术学院 | A kind of High-accuracy direct current resistance meter |
-
2018
- 2018-12-23 CN CN201822162557.1U patent/CN209656785U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109557377A (en) * | 2018-12-23 | 2019-04-02 | 武汉职业技术学院 | A kind of High-accuracy direct current resistance meter |
| CN109557377B (en) * | 2018-12-23 | 2024-04-30 | 武汉职业技术学院 | High-precision direct-current resistance tester |
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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: 20191119 Termination date: 20201223 |
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| CF01 | Termination of patent right due to non-payment of annual fee |