CN201387447Y - Automatic test device for testing current of mobile phone - Google Patents
Automatic test device for testing current of mobile phone Download PDFInfo
- Publication number
- CN201387447Y CN201387447Y CN200820241139U CN200820241139U CN201387447Y CN 201387447 Y CN201387447 Y CN 201387447Y CN 200820241139 U CN200820241139 U CN 200820241139U CN 200820241139 U CN200820241139 U CN 200820241139U CN 201387447 Y CN201387447 Y CN 201387447Y
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- potentiometer
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Abstract
The utility model relates to an automatic test device for testing the current of a mobile phone, comprising a potentiometer adjustment circuit, a filter rectifying circuit, a DC-DC conversion circuit, an A/D conversion circuit, a current sampling and amplification circuit, a singlechip control circuit and a man-machine interface module. The automatic test device is applicable to automatically testing the current in the processes such as research and development, production, maintenance and the like. Compared with the existing test device, the device for testing the current of the mobile phone has the advantages of low cost, convenient operation and the like.
Description
Technical field
The utility model relates to the automatic testing equipment that is used for the mobile phone testing current, is applicable to the automatic test of mobile phone electric current in processes such as research and development, production, maintenance.
Background technology
The mobile phone of a lot of brands of selling on the market has had a strong impact on corresponding product in user's image in the heart, and then has had influence on producer's product sales volume because the mobile phone power consumption is too severe now.Therefore the design of good mobile telephone power consumption is considerable for a product, so how to go the power consumption situation of test products also quite important naturally in research and development, production, maintenance process.Present common method of testing has two kinds, a kind of testing scheme be with the reometer string between mobile phone and the battery, with the method for manual observation electric current is tested.But because the state more complicated of mobile phone electric current.Communication is carried out in the base station of wanting immediately behind the mobile phone power-on and adding, and sets up contact.If do not make a phone call, mobile phone enters holding state, can enter sleep state automatically then.After entering sleep state, major clock is closed, and has only the intermittent work of auxilliary clock, and except the parts of necessity, other bigger parts all are closed, and make every effort to consumed current minimum under sleep state.From the sleep state of starting shooting about 80 seconds, the test of finishing electric current with said method in the so short time obviously was impossible.Another testing scheme is the PC that is equipped with the direct supply of GPIB and uses the LABVIEW programming with.This scheme is the working current of testing mobile phone under any state automatically really, but because it need adopt plurality of devices, so cost height, inconvenient operation, and to tester's requirement also problem such as height relatively.
Summary of the invention
The purpose of this utility model be at exist in the present mobile phone testing current process can not test automatically or can test automatically but its proving installation cost height, complicated operation, to shortcomings such as the user have relatively high expectations, a kind of automatic testing equipment of mobile phone testing current simple to operate, lower-cost has been proposed.
The utility model is achieved through the following technical solutions, and the utility model comprises: potentiometer is adjusted circuit, filter rectifier, DC-DC change-over circuit, A/D change-over circuit, current sampling and amplifying circuit, single chip machine controlling circuit and human-machine interface module.It is characterized in that: the output terminal of DC-DC change-over circuit is connected to the input end of filter rectifier, and the output terminal of filter rectifier links to each other with the positive pole of tested cellular phone power supplies interface, and the negative pole of tested cellular phone power supplies interface is connected to the other end of DC-DC change-over circuit; The end that potentiometer is adjusted circuit connects on the reference voltage end of DC-DC change-over circuit, and the other end that potentiometer is adjusted circuit is connected on the output terminal of filter rectifier; Sampling resistor in current sampling and amplifying circuit two ends and the filter rectifier is connected in parallel, and the output terminal of current sampling and amplifying circuit is connected with the input of A/D change-over circuit; Single chip machine controlling circuit links to each other with DC-DC change-over circuit, potentiometer adjustment circuit, A/D change-over circuit by control port respectively; Human-machine interface module links to each other with single chip machine controlling circuit by control port.
Described sampling resistor is the very little resistance (with respect to the input resistance of current sampling circuit) of the resistance in centre that is serially connected in filter rectifier, and can ignore to the influence of DC-DC change-over circuit.
Described DC-DC change-over circuit can be by the single chip machine controlling circuit controller switches, adjust circuit and be connected to a resistance connecting tested mobile phone and potentiometer, and its output voltage can be adjusted circuit by potentiometer and regulates.
It is a numerical control potentiometer circuit that described potentiometer is adjusted circuit, and controls the size of its place in circuit resistance by the single chip machine controlling circuit controller.
The utility model, adopt human-machine interface module that the operating voltage of mobile phone is set, its magnitude of voltage sends to single chip machine controlling circuit by control end, the single chip machine controlling circuit CONTROLLED POTENTIAL device that says the word is adjusted circuit, and potentiometer is adjusted circuit conditioning, and it inserts resistance to make the magnitude of voltage that outputs to tested mobile phone end be the operating voltage that human-machine interface module is provided with.The mobile phone operate as normal is when various tested state, current sampling and amplifying circuit this working current constantly of its mobile phone of sampling, and process A/D change-over circuit is input to governor circuit, governor circuit sends to human-machine interface module with its measurement result then, and showing each working current curve of mobile phone constantly at its liquid crystal display, the user can make things convenient for, observe intuitively each working current constantly of mobile phone.Compare with existing proving installation, have advantages such as cost is low, easy to operate.
Description of drawings
Fig. 1 entire block diagram of the present utility model;
Fig. 2 is DC-DC conversion and rectification circuit filtering principle figure;
Fig. 3 current sampling and amplifying circuit schematic diagram;
Embodiment
As shown in Figure 1, the utility model comprises: potentiometer is adjusted circuit, filter rectifier, DC-DC change-over circuit, A/D change-over circuit, current sampling and amplifying circuit, single chip machine controlling circuit and human-machine interface module.Wherein single chip machine controlling circuit realizes that with low cost single chip 89C2051 it mainly realizes the adjustment of output voltage and reading of A/D translation data, and carries out the mutual of data by standard serial port and human-machine interface module.The A/D change-over circuit mainly is made up of A/D converter TLC1549 and reference power supply LM336-2.5.TLC1549 is 10 A/D converters, built-in sample-and-hold circuit, serial data output, external reference voltage, single 5V working power.The scope of analog input voltage Vi is reference power source REF-～REF+, i.e. 2.5V; The P3.5 of sheet choosing (control) signal CS and single-chip microcomputer joins, and data line DATA meets P1.3, and clock line CLK meets P1.2.Potentiometer is adjusted circuit and is adopted 2 X9319WP8 series connection to enlarge setting range, and chip selection signal CS_1 separately and CS_2 and increment control signal INC and direction control signal U/D meet I/O port P1.4, P1.7, P1.5 and the P1.6 of single-chip microcomputer 89C2051 respectively; Tap and the output of high-end short circuit are equivalent to variable two ends resistor; U/D is that 1 o'clock resistance increases, and is to reduce in 0 o'clock, and chip selection signal is 0 effective, and promptly X9C103 changes the output resistance size according to U/D at the INC negative edge, and each negative pulse changes 100 Ω, and the INC operating frequency is 2KHz to the maximum.Potentiometer is adjusted circuit equivalent and variable resistor RX, and its resistance is by the single-chip microcomputer decision of governor circuit, and maximal value is 20K Ω, and it is used for adjusting the output voltage of DC-DC change-over circuit.
As shown in Figure 2, DC-DC change-over circuit and current rectifying and wave filtering circuit thereof are mainly realized with devices such as chip LM2576 and some resistance inductance.Base stage on the triode connects the P3.2 pin of single-chip microcomputer, is used to control the output of power supply and close; RX is the equivalent resistance that potentiometer is adjusted circuit; R5 is a pressure resistance, and resistance is 0.2 Ω, and the input resistance of voltage sample circuit is very big, about 12K Ω, and it can be ignored the influence of DC-DC change-over circuit; The average commutated current of the maximum forward of schottky diode 1N5822 reaches 3A; L1, L2, C5, C6 and D1 and R6 and C8 are used for rectification; Variable resistor W3 generally is adjusted into 2K Ω, ignores R5, and the resistance of establishing W3 is RW, and the resistance of RL is RL, and then the input voltage computing formula of mobile phone is VO=1.23 * (1+RX/RW); Calculating output voltage thus is 1.23V～10V.
As shown in Figure 3, current sampling and amplifying circuit be connected to filter rectifier in sampling resistor R5 two ends pressure.Capacitor C 11, C10 and C12 only have integral action in frequency during greater than 170Hz, and the frequency of operation of circuit is lower, can ignore during enlargement factor during calculating.If the voltage at R5 two ends is respectively V1 and V2, the electric current that flows through sample resistance R5 is Ii, Ii=(V1-V2)/R5 then, and previous stage must be set to difference channel; If the resistance of W1 is RW1, the resistance of W2 is RW2; R9/R8=(R11+RW1)/R10 is then arranged,, adjust the value of RW1, in fact connect 6 pin of R8 and U6, open circuit debugging, closed circuit working with short-circuit block for the ease of debugging; When all being ideal value, enlargement factor is 5, i.e. Vi=5* (V1-V2).The enlargement factor of back one-level is 1+RW2/R13, and actual adjustment two-stage enlargement factor is 10.
Claims (4)
1, a kind of automatic testing equipment that is used for the mobile phone testing current, it comprises: potentiometer is adjusted circuit, filter rectifier, DC-DC change-over circuit, A/D change-over circuit, current sampling and amplifying circuit, single chip machine controlling circuit and human-machine interface module.It is characterized in that: the output terminal of DC-DC change-over circuit is connected to the input end of filter rectifier, and the output terminal of filter rectifier links to each other with the positive pole of tested cellular phone power supplies interface, and the negative pole of tested cellular phone power supplies interface is connected to the other end of DC-DC change-over circuit; The end that potentiometer is adjusted circuit connects on the reference voltage end of DC-DC change-over circuit, and the other end that potentiometer is adjusted circuit is connected on the output terminal of filter rectifier; Sampling resistor in current sampling and amplifying circuit two ends and the filter rectifier is connected in parallel, and the output terminal of current sampling and amplifying circuit is connected with the input of A/D change-over circuit; Single chip machine controlling circuit links to each other with DC-DC change-over circuit, potentiometer adjustment circuit, A/D change-over circuit by control port respectively; Human-machine interface module links to each other with single chip machine controlling circuit by control port.
2, a kind of automatic testing equipment that is used for the mobile phone testing current according to claim 1 is characterized in that described sampling resistor is ratio≤1 that is serially connected in the resistance in centre with the input resistance resistance of current sampling circuit of filter rectifier: 1000 resistance.
3, a kind of automatic testing equipment that is used for the mobile phone testing current according to claim 1, it is characterized in that the DC-DC change-over circuit can be by the single chip machine controlling circuit controller switches, be connected to a resistance at tested mobile phone of connection and potentiometer adjustment circuit, output voltage can be adjusted circuit by potentiometer and regulate.
4, a kind of automatic testing equipment that is used for the mobile phone testing current according to claim 1, it is characterized in that it is a numerical control potentiometer circuit that described potentiometer is adjusted circuit, and control the size of its place in circuit resistance by the single chip machine controlling circuit controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200820241139U CN201387447Y (en) | 2008-12-30 | 2008-12-30 | Automatic test device for testing current of mobile phone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200820241139U CN201387447Y (en) | 2008-12-30 | 2008-12-30 | Automatic test device for testing current of mobile phone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201387447Y true CN201387447Y (en) | 2010-01-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200820241139U Expired - Fee Related CN201387447Y (en) | 2008-12-30 | 2008-12-30 | Automatic test device for testing current of mobile phone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201387447Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106291045A (en) * | 2015-05-22 | 2017-01-04 | 登腾电子股份有限公司 | Current sensing module, power conversion device and electronic device applying same |
-
2008
- 2008-12-30 CN CN200820241139U patent/CN201387447Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106291045A (en) * | 2015-05-22 | 2017-01-04 | 登腾电子股份有限公司 | Current sensing module, power conversion device and electronic device applying same |
| CN106291045B (en) * | 2015-05-22 | 2019-02-19 | 登腾电子股份有限公司 | Current sensing module, power conversion device and electronic device applying same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100120 Termination date: 20121230 |