CN213337987U - Connecting wire automatic detection circuit and device - Google Patents
Connecting wire automatic detection circuit and device Download PDFInfo
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- CN213337987U CN213337987U CN202021882846.XU CN202021882846U CN213337987U CN 213337987 U CN213337987 U CN 213337987U CN 202021882846 U CN202021882846 U CN 202021882846U CN 213337987 U CN213337987 U CN 213337987U
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Abstract
本实用新型公开了一种连接线自动检测电路及装置，所述连接线自动检测电路包括检测模块和设置在主板连接座上的连接模块，所述连接模块包括第一测试端和第二测试端；所述主板连接座连接待测连接线；所述检测模块分别连接所述第一测试端和所述第二测试端，用于检测所述第一测试端和所述第二测试端之间的电阻值，并根据所述电阻值确定所述待测连接线正常连接或异常连接；本实用新型能够实现连接线的连接性的自动检测，进而提高检测的准确性和检测效率。
The utility model discloses an automatic detection circuit and a device for connecting lines. The automatic detection circuit for connecting lines comprises a detection module and a connection module arranged on a mainboard connection seat, and the connection module includes a first test end and a second test end ; The mainboard connection base is connected to the connecting line to be tested; The detection module is respectively connected to the first test end and the second test end, and is used to detect the connection between the first test end and the second test end. According to the resistance value, the normal connection or abnormal connection of the connecting line to be tested is determined; the utility model can realize the automatic detection of the connectivity of the connecting line, thereby improving the detection accuracy and detection efficiency.
Description
Technical Field
The utility model relates to a TV set field, in particular to connecting wire automated inspection circuit and device.
Background
At present, stress detection, subjective visual detection or power-on display detection of some physical properties are commonly used for detecting the connectivity of the FFC line in the television production stage, however, the detections are all non-automatic and have high error rate, and direct power-on detection causes certain damage to a screen if the connectivity of the FFC line is poor or a short circuit exists.
Thus, the prior art has yet to be improved and enhanced.
SUMMERY OF THE UTILITY MODEL
In view of the foregoing prior art's weak point, an object of the utility model is to provide a connecting wire automated inspection circuit and device, the accuracy that detects is improved to the connectivity that can the automated inspection connecting wire.
In order to achieve the purpose, the utility model adopts the following technical proposal:
an automatic detection circuit for a connecting wire comprises a detection module and a connecting module arranged on a mainboard connecting seat, wherein the connecting module comprises a first test end and a second test end; the mainboard connecting seat is connected with a connecting wire to be tested; the detection module is respectively connected with the first test end and the second test end and used for detecting the resistance value between the first test end and the second test end and determining the normal connection or abnormal connection of the connecting wire to be detected according to the resistance value.
In the automatic detection circuit for the connecting wire, the connecting module further comprises a connecting interface and a test resistor; the first connecting pin of the connecting interface is connected with the second testing end; the second connecting pin of the connecting interface is connected with one end of the testing resistor, and the other end of the testing resistor is connected with the first testing end.
In the automatic detection circuit for the connecting wire, the detection module comprises a voltage division unit, a conversion unit and a controller; the voltage division unit is used for performing voltage division sampling on the voltage between the first testing end and the second testing end and outputting a sampling voltage to the conversion unit; the conversion unit converts the sampling voltage into a voltage value and outputs the voltage value to the controller; and the controller is used for calculating the resistance value according to the voltage value and determining the normal connection or abnormal connection of the connecting wire to be tested according to the resistance value and a preset value.
In the automatic detection circuit for the connecting wire, the controller is configured to determine that the connecting wire to be tested is normally connected when determining that the resistance value is equal to the preset value, and determine that the connecting wire to be tested is abnormally connected when determining that the resistance value is not equal to the preset value.
In the automatic detection circuit for the connecting wire, the preset value is the resistance value of the test resistor.
In the automatic detection circuit for the connecting wire, the voltage division unit comprises a first resistor and a second resistor, one end of the first resistor is connected with the first test end, one end of the second resistor and the conversion unit, the other end of the first resistor is connected with the power supply, and the other end of the second resistor is connected with the second test end.
In the automatic connecting line detection circuit, the conversion unit comprises a conversion chip, a CH1 signal end of the conversion chip is connected with the first test end, and a DO signal end, a DI signal end, a CS signal end and a CLK signal end of the conversion chip are all connected with the controller.
In the connecting wire automatic detection circuit, the first connecting pin and the second connecting pin are both grounding pins, and the first connecting pin and the second connecting pin are not adjacent.
The automatic detection circuit for the connecting wire further comprises an alarm, and the alarm is connected with the controller; the controller is also used for driving the alarm to give an alarm when the connecting wire to be tested is abnormally connected.
The automatic detection device for the connecting line comprises the automatic detection circuit for the connecting line.
Compared with the prior art, the utility model provides a connecting wire automatic detection circuit and device, connecting wire automatic detection circuit includes detection module and the connection module that sets up on the mainboard connecting seat, the connection module includes first test end and second test end; the mainboard connecting seat is connected with a connecting wire to be tested; the detection module is respectively connected with the first test end and the second test end and is used for detecting the resistance value between the first test end and the second test end and determining the normal connection or abnormal connection of the connecting wire to be tested according to the resistance value; the utility model discloses can realize the automated inspection of the connectivity of connecting wire, and then improve the accuracy and the detection efficiency that detect.
Drawings
Fig. 1 is a block diagram of the automatic detection circuit for connecting wires according to the present invention;
fig. 2 is the circuit schematic diagram of the connection line automatic detection circuit provided by the utility model.
Detailed Description
The utility model provides a connecting wire automated inspection circuit and device can the connectivity of automated inspection connecting wire, improves the accuracy that detects.
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the following description of the present invention will refer to the accompanying drawings and illustrate embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Referring to fig. 1, according to the present invention, the automatic connecting line detecting circuit 10 includes a detecting module 110 and a connecting module 120 disposed on a motherboard connecting seat, where the connecting module 120 includes a first testing terminal TP1 and a second testing terminal TP 2; the mainboard connecting seat is connected with a connecting wire to be tested; the detection module 110 is respectively connected to the first test end TP1 and the second test end TP2, and is configured to detect a resistance value between the first test end TP1 and the second test end TP2, and determine a normal connection or an abnormal connection of the connection line to be tested according to the resistance value; in this embodiment, the connection line to be detected is an FFC line, the FFC line is connected between the main board 20 and the screen body 30 of the television, and is configured to transmit a communication signal between the main board 20 and the screen body 30, specifically, the FFC line is connected to a main board connection seat, that is, a main board FFC seat, the first test end TP1 and the second test end TP2 are led out from the main board FFC seat, and then the detection module 110 is directly connected to the two test ends directly, so that whether the connection of the FFC line is normal or not can be automatically detected, thereby realizing automatic detection of the connection line connectivity, and improving accuracy and detection efficiency of detection.
Further, referring to fig. 2, the connection module 120 includes a connection interface and a test resistor R0; the first connecting pin of the connecting interface is connected with the second testing terminal TP 2; a second connection pin of the connection interface is connected to one end of the test resistor R0, and the other end of the test resistor R0 is connected to the first test terminal TP1, where the connection interface in this embodiment corresponds to a main board FFC socket, where the first connection pin and the second connection pin are both ground pins, and the first connection pin and the second connection pin are not adjacent to each other; specifically, two grounding pins far away from each other on the main board FFC base are respectively selected as a first testing end TP1 and a second testing end TP2, in this embodiment, the first connecting pin can be pin 1, the second connecting pin can be pin 41, then a testing resistor R0 is connected from the pin 41, the connecting end of the testing resistor R0 is led out as a first testing end TP1 to be connected with the detection module 110, and the pin 1 is directly led out as a second testing point to be connected with the detection module 110, so that automatic detection of subsequent FFC wire connectivity is completed, the FFC wire connection error rate is reduced, and further the damage rate of the screen 30 due to the problem of FFC connectivity is reduced.
Further, the detecting module 110 includes a voltage dividing unit 111, a converting unit 112 and a controller 113, wherein the input end of the voltage dividing unit 111 is connected to the first testing terminal TP1 and the second testing terminal TP2, respectively, the output end of the voltage dividing unit 111 is connected to the converting unit 112, and the converting unit 112 is further connected to the controller 113.
The voltage dividing unit 111 is configured to divide and sample a voltage between the first test terminal TP1 and the second test terminal TP2, and output a sampled voltage to the converting unit 112; the conversion unit 112 converts the sampled voltage into a voltage value and outputs the voltage value to the controller 113; the controller 113 is configured to calculate the resistance value according to the voltage value, and determine normal connection or abnormal connection of the connection line to be tested according to the resistance value and a preset value, where in this embodiment, the preset value is a resistance value of the test resistor R0; when the FFC line connectivity is in a problem, the two selected test ends are not connected, the impedance of the two pins is infinite at this time, when the FFC line is connected perfectly, because the two test ends selected by the motherboard 20 are grounded and conducted for the ground pin, the voltage dividing unit 111 divides the voltages of the two test ends and converts the voltages into corresponding data for the conversion module, and then the resistance value is obtained through calculation by the controller 113, and is equal to the preset value at this time, so that the connectivity of the FFC line can be determined by comparing the resistance value obtained through calculation by the controller 113 with the preset value.
Specifically, the controller 113 is specifically configured to determine that the connection line to be tested is normally connected when it is determined that the resistance value is equal to the preset value, and determine that the connection line to be tested is abnormally connected when it is determined that the resistance value is not equal to the preset value, in this embodiment, the resistance value of the test resistor R0 is set to 75 ohms, that is, when the resistance value calculated by the controller 113 is equal to 75 ohms, it is indicated that the FFC line is normally connected at this time, otherwise, if the resistance value is not equal to 75 ohms, it is indicated that the FFC line is abnormally connected at this time, so that the automatic detection of the connectivity of the FFC line is implemented.
Further, the voltage dividing unit 111 includes a first resistor R1 and a second resistor R2, one end of the first resistor R1 is connected to the first test terminal TP1, one end of the second resistor R2 and the converting unit 112, the other end of the first resistor R1 is connected to the power supply, and the other end of the second resistor R2 is connected to the second test terminal TP2, in this embodiment, the voltage dividing unit 111 divides the voltage between the first test terminal TP1 and the second test terminal TP2 and outputs the divided voltage to the converting unit 112, so as to calculate the subsequent resistance value.
Further, the conversion unit 112 includes a conversion chip U1, the CH1 signal terminal of the conversion chip U1 is connected to the first test terminal TP1, the DO signal terminal, the DI signal terminal, the CS signal terminal, and the CLK signal terminal of the conversion chip U1 are all connected to the controller 113, in this embodiment, the model of the conversion chip U1 is ADC0832, the model of the controller 113 is MSP430, and of course, in other embodiments, the conversion chip U1 and the controller 113 having the same function may be selected; the conversion chip U1 performs analog-to-digital conversion on the received sampling voltage to obtain a voltage value, outputs the voltage value to the SPI interface of the controller 113, and then calculates the resistance value by the controller 113 according to the voltage value; noting that the voltage value is VIN1, the resistance value of the first resistor R1 is R1, and the resistance value is R0, the calculation process of the resistance value is as follows:
3.3V*R0/(R1+R0)＝VIN1 (1)
R0＝VIN1*R1/(3.3-VIN1) (2)
when the calculated R3 is equal to the resistance value of 75 ohms of the test resistor R0, the FFC line connection is good, otherwise, the FFC line connection is abnormal.
Further, the automatic connecting line detection circuit 10 further includes an alarm 130, and the alarm 130 is connected to the controller 113; the controller 113 is further configured to drive the alarm 130 to alarm when the connection line to be tested is abnormally connected, in this embodiment, the alarm 130 selects a buzzer, that is, when the controller 113 calculates that the resistance value is not equal to the preset value, the controller outputs a control signal to control the buzzer to alarm, so as to prompt that the FCC line connection is abnormal.
Further, referring to fig. 1, the automatic connecting line detecting circuit 10 further includes an indicator lamp 140, the indicator lamp 140 is divided into a red lamp and a green lamp, and when the controller 113 calculates that the resistance value is equal to the preset value, the controller outputs a control signal to control the green lamp to be turned on; when the resistance value calculated by the controller 113 is not equal to the preset value, a control signal is output to control the red lamp to be lightened, and meanwhile, the buzzer is also controlled to give an alarm, so that the current detection result is visually indicated, and a maintenance worker can perform timely maintenance conveniently.
For better understanding of the present invention, the following description is made in detail with reference to fig. 1 and 2 for the working principle of the automatic connecting line detection circuit 10 of the present invention:
after the main board FFC seat and the FFC wire are installed, connecting the test module with a first test end TP1 and a second test end TP2 set by the main board 20 seat; then, the voltage divider 111 samples the voltage between the first test terminal TP1 and the second test terminal TP2 and outputs the sampled voltage to the converter chip U1, the converter chip U1 converts the sampled voltage into a voltage value and outputs the voltage value to the controller 113, and the controller 113 calculates the resistance value; then, the controller 113 determines whether the resistance value is equal to a preset value; if the resistance value is not equal to the preset value, the FFC wire is abnormal in connection, the controller 113 controls the buzzer to give an alarm and controls the red lamp to be lightened, and at the moment, the FFC wire needs to be reassembled; if the resistance value is equal to the predetermined value, the FFC line is connected well, and the controller 113 controls the green light to be turned on.
The utility model also provides a connecting wire automatic checkout device, include as above connecting wire automatic checkout circuit, because the above has carried out detailed description to this connecting wire automatic checkout circuit, no longer give unnecessary details here.
To sum up, the utility model provides a connecting wire automatic detection circuit and a device, the connecting wire automatic detection circuit comprises a detection module and a connection module arranged on a mainboard connecting seat, the connection module comprises a first testing end and a second testing end; the mainboard connecting seat is connected with a connecting wire to be tested; the detection module is respectively connected with the first test end and the second test end and is used for detecting the resistance value between the first test end and the second test end and determining the normal connection or abnormal connection of the connecting wire to be tested according to the resistance value; the utility model discloses can realize the automated inspection of the connectivity of connecting wire, and then improve the accuracy and the detection efficiency that detect.
It should be understood that equivalent alterations and modifications can be made by those skilled in the art according to the technical solution of the present invention and the inventive concept thereof, and all such alterations and modifications should fall within the scope of the appended claims.
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021882846.XU CN213337987U (en) | 2020-09-01 | 2020-09-01 | Connecting wire automatic detection circuit and device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021882846.XU CN213337987U (en) | 2020-09-01 | 2020-09-01 | Connecting wire automatic detection circuit and device |
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| CN213337987U true CN213337987U (en) | 2021-06-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113406535A (en) * | 2021-06-17 | 2021-09-17 | 合肥京东方视讯科技有限公司 | Test board and test method for detecting electronic wire between boards |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113406535A (en) * | 2021-06-17 | 2021-09-17 | 合肥京东方视讯科技有限公司 | Test board and test method for detecting electronic wire between boards |
| CN113406535B (en) * | 2021-06-17 | 2023-10-24 | 合肥京东方视讯科技有限公司 | Test board and test method for detecting electronic wires between boards |
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