CN104090153A - Detection system and detection method of liquid crystal module multi-channel power supply - Google Patents
Detection system and detection method of liquid crystal module multi-channel power supply Download PDFInfo
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- CN104090153A CN104090153A CN201410273326.1A CN201410273326A CN104090153A CN 104090153 A CN104090153 A CN 104090153A CN 201410273326 A CN201410273326 A CN 201410273326A CN 104090153 A CN104090153 A CN 104090153A
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Abstract
The invention discloses a detection method of a liquid crystal module multi-channel power supply. The method comprises steps as follows: 1, an upper computer outputs a switch-on control signal, and a liquid crystal module test device outputs multiply channels of power supply signals according to the switch-on control signal; 2, each channel of power supply signals output by the liquid crystal module test device is input to a power supply signal input end corresponding to a liquid crystal module through a corresponding current calculator, each current calculator calculates current values of the power supply signals flowing through the current calculator, and each voltage current calculator performs sampling and calculates to obtain voltage values of the corresponding power supply signals from a current anode detection end of the corresponding current calculator; 3, each current calculator and each voltage current calculator convert the calculated current values and voltage values of the power supply signals into digital signals through a corresponding analog-digital converter respectively, and then the digital signals are transmitted to an MCU; and 4, the MCU sends the obtained current values and voltage values of the power supply signals to a display for displaying. According to a detection system and the detection method of the liquid crystal module multi-channel power supply, the measuring efficiency of the liquid crystal module multi-channel power supply is improved greatly.
Description
Technical field
The components and parts technical field that the present invention relates to communicate by letter, refers to a kind of liquid crystal module multiple power supplies detection system and detection method particularly.
Background technology
Generally adopt multimeter to measure to electric current and the magnitude of voltage of liquid crystal module (being liquid crystal display) power supply at present, but due to more (the voltage vdd of digital signal power supply of the value that liquid crystal module need to be measured, the electric current I dd of digital signal power supply, I/O (input/output in integrated circuit, input/output port) the voltage vddio of power supply, the electric current I ddio of the power supply of I/O in integrated circuit, the voltage vbl of LCD backlight power supply, the current i bl of LCD backlight power supply, the voltage vsn of negative supply, the current i sn of negative supply), and multimeter need to carry out frequently pattern switching in the time measuring above-mentioned voltage and current value, have a strong impact on the measurement efficiency of electric current and the magnitude of voltage of liquid crystal module power supply.In addition, existing multimeter metering system cannot be measured the above-mentioned multiple power supplies of liquid crystal module simultaneously.
Summary of the invention
Object of the present invention will provide a kind of liquid crystal module multiple power supplies detection system and detection method exactly, and this device and detection method have higher measurement efficiency, and can measure the multiple power supplies of liquid crystal module simultaneously.
For realizing this object, the liquid crystal module multiple power supplies detection system that the present invention is designed, it is characterized in that: it comprises host computer, liquid crystal module testing device and liquid crystal module multiple power supplies voltage and current detecting device, wherein, described liquid crystal module multiple power supplies voltage and current detecting device comprises MCU (Micro Control Unit, micro-control unit), multiple current operator devices, the multiple voltage operational devices identical with current operator device number, the display being connected with the demonstration data output end of MCU, the signal output part of described host computer connects the control signal input end of liquid crystal module testing device, described liquid crystal module testing device has the multiple power supply signal input ends multiple power supply signal output terminals one to one with liquid crystal module, between each power supply signal output terminal of described liquid crystal module testing device and the corresponding power signal input part of liquid crystal module, be communicated with by a corresponding current operator device, the anodal test side of electric current of described current operator device connects the power supply signal output terminal of liquid crystal module testing device, the electric current negative pole test side of current operator device connects the power supply signal input end of liquid crystal module,
Between the anodal test side of electric current of described each current operator device and electric current negative pole test side, be connected with sampling resistor, the voltage sample end of described each voltage operational device connects the anodal test side of electric current of corresponding current arithmetical unit;
The current operator result output terminal of described each current operator device connects the corresponding electric current signal input part of MCU by corresponding analog to digital converter, the voltage operational result output terminal of described each voltage operational device connects the relevant voltage signal input part of MCU by corresponding analog to digital converter.
A method of utilizing above-mentioned liquid crystal module multiple power supplies detection system to carry out the detection of liquid crystal module multiple power supplies, is characterized in that, it comprises the steps:
Step 1: host computer is opened electric control signal to liquid crystal module testing device output, and liquid crystal module testing device is opened electric control signal output multi-channel power supply signal according to this;
Step 2: liquid crystal module testing device output Mei road power supply signal is input to the corresponding power supply signal input end of liquid crystal module by corresponding current operator device respectively, now each current operator device calculates self the current value of power supply signal of flowing through, and now each voltage operational device is sampled from the anodal test side of electric current of corresponding current operator device and calculated the magnitude of voltage of corresponding power supply signal;
Step 3: be transferred to MCU after each current operator device and each voltage operational device convert the magnitude of voltage of the current value of the power supply signal calculating and power supply signal to digital signal by corresponding analog to digital converter respectively;
Step 4: described MCU sends to display to show the magnitude of voltage of the current value of the power supply signal obtaining and power supply signal.
Beneficial effect of the present invention:
1) system of the present invention can, in the time that needs are measured, access between liquid crystal module testing device and liquid crystal module at any time, and native system powers separately, can not cause any impact to the routine work of liquid crystal module.
2) the multimeter metering system that the present invention is relatively traditional, can measure as required the multiple power supplies of liquid crystal module simultaneously, measuring process is easy does not need ordinary switching working mode as traditional multimeter metering system, has improved greatly the measurement efficiency of liquid crystal module multiple power supplies.
Brief description of the drawings
Fig. 1 is structured flowchart of the present invention;
Wherein, 1-host computer, 2-liquid crystal module testing device, 3-liquid crystal module multiple power supplies voltage and current detecting device, 3.1-MCU, 3.2-current operator device, 3.3-voltage operational device, 3.4-sampling resistor, 3.5-analog to digital converter, 4-liquid crystal module, 5-display.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
Liquid crystal module multiple power supplies detection system as shown in Figure 1, it comprises host computer 1, liquid crystal module testing device 2 and liquid crystal module multiple power supplies voltage and current detecting device 3, wherein, described liquid crystal module multiple power supplies voltage and current detecting device 3 comprises MCU3.1, multiple current operator devices 3.2, the multiple voltage operational devices 3.3 identical with current operator device 3.2 numbers, the display 5 being connected with the demonstration data output end of MCU3.1, the signal output part of described host computer 1 connects the control signal input end of liquid crystal module testing device 2, described liquid crystal module testing device 2 has the multiple power supply signal input ends multiple power supply signal output terminals one to one with liquid crystal module 4, between each power supply signal output terminal of described liquid crystal module testing device 2 and the corresponding power signal input part of liquid crystal module 4, be communicated with by a corresponding current operator device 3.2, the anodal test side of electric current of described current operator device 3.2 connects the power supply signal output terminal of liquid crystal module testing device 2, the electric current negative pole test side of current operator device 3.2 connects the power supply signal input end (being each current operator device 3.2 accesses between the power supply signal output terminal of liquid crystal module testing device 2 and the power supply signal input end of corresponding liquid crystal module 4 in the mode of series connection) of liquid crystal module 4,
Between the anodal test side of electric current of described each current operator device 3.2 and electric current negative pole test side, be connected with sampling resistor 3.4, the voltage sample end of described each voltage operational device 3.3 connects the anodal test side of electric current of corresponding current arithmetical unit 3.2; Above-mentioned sampling resistor 3.4 is for current sample, and sampling resistor 3.4 has electric current to flow through, and just there is voltage at two ends, is converted to voltage by current operator device 3.2, MCU3.1 and analog to digital converter 3.5, then computing, draws electric current;
The current operator result output terminal of described each current operator device 3.2 connects the corresponding electric current signal input part of MCU3.1 by corresponding analog to digital converter 3.5, the voltage operational result output terminal of described each voltage operational device 3.3 connects the relevant voltage signal input part of MCU3.1 by corresponding analog to digital converter 3.5.
In technique scheme, the image signal output end of described liquid crystal module testing device 2 connects the picture signal input end of liquid crystal module 4.The picture signal that above-mentioned liquid crystal module testing device 2 is carried to liquid crystal module 4 is for lighting liquid crystal module and showing image.
In technique scheme, multiple power supply signal output terminals of described liquid crystal module testing device 2 are respectively the current signal Iddio output terminal of the power supply of I/O in the voltage signal vddio output terminal, integrated circuit of the power supply of I/O in the current signal Idd output terminal, integrated circuit of the voltage signal vdd output terminal of digital signal power supply, digital signal power supply, the voltage signal vbl output terminal of LCD backlight power supply, the current signal ibl output terminal of LCD backlight power supply, the voltage signal vsn output terminal of negative supply, the current signal isn output terminal of negative supply.
A kind of method of utilizing above-mentioned liquid crystal module multiple power supplies detection system to carry out the detection of liquid crystal module multiple power supplies, its is that host computer 1 sends and opens after electricity order liquid crystal module testing device 2 in simple terms, liquid crystal module testing device 2 is given and is detected liquid crystal module power supply, now liquid crystal module multiple power supplies voltage and current detecting device 3 calculates electric current and voltage value, and is shown by MCU3.1 and display 5.
Method of the present invention, comprises the steps: specifically
Step 1: host computer 1 is opened electric control signal to liquid crystal module testing device 2 outputs, and liquid crystal module testing device 2 is opened electric control signal output multi-channel power supply signal according to this;
Step 2: liquid crystal module testing device 2 is exported Mei road power supply signal and is input to the corresponding power supply signal input end of liquid crystal module 4 by corresponding current operator device 3.2 respectively, now each current operator device 3.2 calculates self the current value of power supply signal of flowing through, and now each voltage operational device 3.3 is sampled from the anodal test side of electric current of corresponding current operator device 3.2 and calculated the magnitude of voltage of corresponding power supply signal;
Step 3: be transferred to MCU3.1 after each current operator device 3.2 and each voltage operational device 3.3 convert the magnitude of voltage of the current value of the power supply signal calculating and power supply signal to digital signal by corresponding analog to digital converter 3.5 respectively;
Step 4: described MCU3.1 sends to display 5 to show the magnitude of voltage of the current value of the power supply signal obtaining and power supply signal;
Step 5, host computer 1 closes electric control signal to liquid crystal module testing device 2 outputs, liquid crystal module testing device 2 power-off, now liquid crystal module multiple power supplies voltage and current detecting device 3 stops detecting.
In technique scheme, the model that MCU3.1 selects is STM32F4, its plurality of voltages electric current of simultaneously sampling, the model that above-mentioned liquid crystal module testing device 2 is selected is the processor of atmel arm9 series, display 5 adopts the heavenly steed liquid crystal display of 3.5 cun, the chip model that voltage operational device 3.3 is selected is AD8591, and it is MAX9918ASA+ that current operator device 3.2 is selected the model of chip.
The content that this instructions is not described in detail belongs to the known prior art of professional and technical personnel in the field.
Claims (5)
1. a liquid crystal module multiple power supplies detection system, it is characterized in that: it comprises host computer (1), liquid crystal module testing device (2) and liquid crystal module multiple power supplies voltage and current detecting device (3), wherein, described liquid crystal module multiple power supplies voltage and current detecting device (3) comprises MCU (3.1), multiple current operator devices (3.2), the multiple voltage operational devices (3.3) identical with current operator device (3.2) number, the display (5) being connected with the demonstration data output end of MCU (3.1), the signal output part of described host computer (1) connects the control signal input end of liquid crystal module testing device (2), described liquid crystal module testing device (2) has the multiple power supply signal input ends multiple power supply signal output terminals one to one with liquid crystal module (4), between each power supply signal output terminal of described liquid crystal module testing device (2) and the corresponding power signal input part of liquid crystal module (4), be communicated with by a corresponding current operator device (3.2), the anodal test side of electric current of described current operator device (3.2) connects the power supply signal output terminal of liquid crystal module testing device (2), the electric current negative pole test side of current operator device (3.2) connects the power supply signal input end of liquid crystal module (4),
Between the anodal test side of electric current of described each current operator device (3.2) and electric current negative pole test side, be connected with sampling resistor (3.4), the voltage sample end of described each voltage operational device (3.3) connects the anodal test side of electric current of corresponding current arithmetical unit (3.2);
The current operator result output terminal of described each current operator device (3.2) connects the corresponding electric current signal input part of MCU (3.1) by corresponding analog to digital converter (3.5), the voltage operational result output terminal of described each voltage operational device (3.3) connects the relevant voltage signal input part of MCU (3.1) by corresponding analog to digital converter (3.5).
2. liquid crystal module multiple power supplies detection system according to claim 1, is characterized in that: the image signal output end of described liquid crystal module testing device (2) connects the picture signal input end of liquid crystal module (4).
3. liquid crystal module multiple power supplies detection system according to claim 1, it is characterized in that: multiple power supply signal output terminals of described liquid crystal module testing device (2) are respectively the voltage signal output end of digital signal power supply, the current signal output end of digital signal power supply, the voltage signal output end of the power supply of I/O in integrated circuit, the current signal output end of the power supply of I/O in integrated circuit, the voltage signal output end of LCD backlight power supply, the current signal output end of LCD backlight power supply, the voltage signal output end of negative supply, the current signal output end of negative supply.
4. utilize the method that liquid crystal module multiple power supplies detection system is carried out the detection of liquid crystal module multiple power supplies described in claim 1, it is characterized in that, it comprises the steps:
Step 1: host computer (1) is opened electric control signal to liquid crystal module testing device (2) output, and liquid crystal module testing device (2) is opened electric control signal output multi-channel power supply signal according to this;
Step 2: liquid crystal module testing device (2) output Mei road power supply signal is input to the corresponding power supply signal input end of liquid crystal module (4) by corresponding current operator device (3.2) respectively, now each current operator device (3.2) calculates self the current value of power supply signal of flowing through, and now each voltage operational device (3.3) is sampled from the anodal test side of electric current of corresponding current operator device (3.2) and calculated the magnitude of voltage of corresponding power supply signal;
Step 3: each current operator device (3.2) and each voltage operational device (3.3) are transferred to MCU (3.1) after converting the magnitude of voltage of the current value of the power supply signal calculating and power supply signal to digital signal by corresponding analog to digital converter (3.5) respectively;
Step 4: described MCU (3.1) sends to display (5) to show the magnitude of voltage of the current value of the power supply signal obtaining and power supply signal.
5. the method that liquid crystal module multiple power supplies according to claim 4 detects, it is characterized in that: after step 4, also comprise step 5, host computer (1) closes electric control signal to liquid crystal module testing device (2) output, liquid crystal module testing device (2) power-off, now liquid crystal module multiple power supplies voltage and current detecting device (3) stops detecting.
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| CN109061438A (en) * | 2018-07-17 | 2018-12-21 | 武汉精测电子集团股份有限公司 | A kind of multiple power supplies parallel current-sharing device and method for the detection of mould group |
| CN111999625A (en) * | 2020-06-02 | 2020-11-27 | 武汉精立电子技术有限公司 | Current monitoring circuit, graphic signal generator and panel detection system |
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Address after: Hubei Province, Wuhan City, South Lake Road 430070 Hongshan District No. 53 WCMC agricultural city shop floor 4 Patentee after: Wuhan fine test electronics group Limited by Share Ltd Address before: Hubei Province, Wuhan City, South Lake Road 430070 Hongshan District No. 53 WCMC agricultural city shop floor 4 Patentee before: Wuhan Jingce Electronic Technology Co., Ltd. |
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