CN214310744U

CN214310744U - Sensor cable connects extension line welding defect detection device soon

Info

Publication number: CN214310744U
Application number: CN202022826042.4U
Authority: CN
Inventors: 孙昊辰; 刘军
Original assignee: Quanli Sensor Technology Nanjing Co ltd
Current assignee: Quanli Sensor Technology Nanjing Co ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-09-28
Anticipated expiration: 2030-11-30

Abstract

The utility model provides a sensor cable conductor connects extension line welding defect detection device soon. The device includes: the detection unit, a D-type 14PIN connector quick connection seat, a test needle, 4 indicator lamps, an alarm and a power interface, wherein the D-type 14PIN connector quick connection seat and the test needle are respectively connected with the detection unit, and the indicator lamps, the alarm and the power interface are in one-to-one correspondence with 4 cables in an extension line to be detected; during testing, a quick connector of a D-type 14PIN connector welded at one end of a tested extension line is inserted into the quick connector seat of the D-type 14PIN connector, and 4 cables at the other end of the tested extension line are respectively taken out to touch the testing needle; the detection unit controls the indicator light and the alarm according to electric signals from 14 PINs in the D-type 14PIN connector quick-connection seat. The utility model discloses can realize that various defective products that have quick joint welding pencil 100% high-efficiently detect, avoid other inspection method detection methods single imperfect, single detection can only examine a welding defect, problem that detection efficiency is low many times.

Description

Sensor cable connects extension line welding defect detection device soon

Technical Field

The utility model relates to a welding defect detection device especially relates to a sensor cable conductor connects extension line welding defect detection device soon.

Background

The extension line of the sensor welding quick connector is an accessory for the calibration of the weighing instrument of an electronic weighing instrument enterprise. A common extension cord includes 4 cables of different colors, and the soldering quick connector includes a D-type 14PIN connector quick connector. The D-type 14PIN connector quick connector has 14 PINs numbered 1-14 (e.g., the lower row of PINs is labeled 1-7 from left to right and the upper row of PINs is labeled 8-14 from left to right). When the extension line is welded with the D-type 14PIN connector quick connector, in order to reduce the contact resistance of the connector, a parallel jumper connection is usually adopted, that is, a first cable is welded with a first row of PINs (i.e., PINs numbered 1 and 8), a second cable is welded with a third row of PINs (i.e., PINs numbered 3 and 10), a third cable is welded with a fifth row of PINs (i.e., PINs numbered 5 and 12), and a fourth PIN is welded with a seventh row of PINs (i.e., PINs numbered 7 and 14), as shown in fig. 1.

And because the welding defect inevitably exists, electronic weighing apparatus enterprise welds sensor extension line and quick connector after, adopts the mode detection welding defect of universal meter measurement break-make mostly. The problem that the universal meter measures the biggest of break-make detection sensor extension line is that the efficiency is low, and can only detect out whether break-make between cable and the welded quick-operation joint, whether have adjacent pin short circuit after welding to the line, other defects such as parallelly connected pin rosin joint can't the short-circuit detection. Therefore, the existing mode of using a multimeter to measure the on-off state has limited detection range for detecting the welding defects, so that part of the extension lines of the welding quick connectors of the sensors with the welding defects are delivered to customers, customer complaints are incurred, and the customers deny the quality of the whole product due to an unobtrusive accessory line.

Disclosure of Invention

The purpose of the invention is as follows: to the above-mentioned problem that prior art exists, provide a sensor cable conductor and connect extension line welding defect detection device soon to effectively improve the inspection efficiency of sensor extension pencil, 100% guarantee that the defective products is successfully detected.

The technical scheme is as follows: the utility model relates to a sensor cable conductor connects extension line welding defect detection device soon, wherein contain 4 cable conductors in the extension line, one end of 4 cable conductors respectively with the 1 st and 8 feet, 3 and 10 feet, 5 and 12 feet, 7 and 14 feet welded connection of the 14PIN connector quick-operation joint of D type, another is the free end. This extension line welding defect detection device includes: the test device comprises a test needle, a detection unit, a D-type 14PIN connector quick connection seat respectively connected with the detection unit, 4 indicator lamps, an alarm and a power interface, wherein the 4 indicator lamps, the alarm and the power interface are in one-to-one correspondence with the 4 cables; the test needle is connected with the power interface; during testing, the quick connector of the D-type 14PIN connector is inserted into the quick connector seat of the D-type 14PIN connector, and the free ends of the 4 cables are respectively taken out to touch the testing needle; the detection unit receives electric signals from 14 PINs in the D-type 14PIN connector quick-connection seat and respectively controls the indicator light and the alarm.

Further, the detection unit comprises a nand gate logic circuit and a not gate logic circuit; the NAND gate logic circuit at least comprises 4 groups of independent input and output paths and a first power supply end, and each group of input and output paths of the NAND gate logic circuit comprises two input ports and one output port; the NOT gate logic circuit at least comprises 5 groups of independent input and output paths and a second power supply end, and each group of input paths of the NOT gate logic circuit comprises an input port and an output port; the first power supply end and the second power supply end are both connected to the power interface; among the 14 PINs of the D-type 14PIN connector quick connection seat, 8 PINs in four rows connected with 4 cables are respectively connected with 8 input ports of 4 groups of input and output channels of the NAND gate logic circuit, and the same row of PINs is connected with the input ports of the same input and output channel; 4 output ports of the NAND gate logic circuit are connected with 4 input ports of 4 groups of input and output paths of the NOT gate logic circuit, and 4 output ports of the 4 groups of input and output paths of the NOT gate logic circuit are respectively connected with 4 indicator lamps; in the 14 PINs of the D-type 14PIN connector quick connection seat, 6 PINs in three rows which are not connected with 4 cables are all connected to the input port of another group of input and output channels except the 4 groups of input and output channels in the NOT gate logic circuit, and the output port of the other group of input and output channels is connected with the alarm.

Further, the nand gate logic circuit is implemented by a 74HC00N nand gate chip, and the not gate logic circuit is implemented by a 74HC04 not gate chip.

Further, the power interface is respectively connected with the nand gate logic circuit and the not gate logic circuit.

Further, 14 PINs in the D-type 14PIN connector quick connection seat are also grounded through corresponding voltage dividing resistors; the test pin is connected to the power interface via a series current limiting resistor.

Has the advantages that: compared with the prior art, the utility model can effectively improve the inspection efficiency of the sensor extension wire harness and can ensure that defective products are successfully detected by 100 percent, thereby avoiding the problems that other inspection methods are single and imperfect, only one welding defect can be detected by single inspection, and the efficiency is low by multiple inspections; the whole set of device is extremely low in cost, and the multi-core wire harness with the quick connectors can be used for detecting other types of multi-core wire harnesses with the quick connectors only by correspondingly replacing the quick connectors of the device and increasing the number of corresponding indicator lamps, so that the device is suitable for various internal product controls of enterprises needing wire harness processing.

Drawings

Fig. 1 is a schematic diagram illustrating connection between a quick connector of a D-type 14PIN connector and 4 cables with different colors in an extension line according to an embodiment of the present invention;

FIG. 2 is a schematic connection diagram of the welding defect detecting device for the extension wire of the present invention;

fig. 3 is a schematic circuit diagram of an embodiment of the device for detecting welding defects of extended lines.

Detailed Description

The present invention will be described in more detail below with reference to the accompanying drawings.

The utility model discloses aim at utilizing the gate circuit chip to establish one set of closed loop detection device, this detection device's design purpose makes the adjacent pin short circuit that violates the design specification, and parallelly connected pin rosin joint corresponds all welding defects such as colour pin position welding mistake and all will send out the warning suggestion tester this pencil to be the defective products that have the defect through the form of sound, light.

As shown in fig. 2, the utility model discloses a detection device includes 4 pilot lamps, alarm and power source that test needle, detecting element and the D type 14PIN connector that is connected with detecting element respectively connect the seat soon. Wherein, 4 pilot lamps and 4 cable conductor one-to-one in the extension line that await measuring. The quick connection seat of the D-type 14PIN connector comprises 14 PINs which correspond to the quick connection heads of the D-type 14PIN connector in a one-to-one mode. During testing, a tester only needs to insert the quick connector of the tested beam D-type 14PIN connector into the quick connector base of the D-type 14PIN connector in the testing device, and takes out 4 cables at the other end of the extension line respectively to touch a testing PIN on the testing device, so that the extension line to be tested can be accessed into the testing device for testing. The detection unit controls the indicator lamp and the alarm according to electric signals from 14 PINs in the D-type 14PIN connector quick-connection base, so that detection personnel can conveniently judge and analyze welding faults according to the working conditions of the indicator lamp and the alarm.

In order to detect the welding defects of the extension line more conveniently and intuitively, the colors of the 4 indicating lamps are respectively the same as the colors of the 4 cables in the quick-connection extension line. For example, in fig. 1, the colors of the 4 cables are respectively black red, white and green, and the colors of the corresponding 4 indicator lights when turned on are also respectively black red, white and green. Wherein, red cable conductor is connected with

number

1 and 8 pin of quick-operation joint, and black cable conductor is connected with number 3 and number 10 pin of quick-operation joint, and green cable conductor is connected with number 5 and number 12 pin of quick-operation joint, and white cable conductor is connected with number 7 and number 14pin of quick-operation joint.

The detection unit comprises a NAND gate logic circuit U2 and a NOT gate logic circuit U3, wherein the output of the NAND gate logic circuit U2 is connected to the input of the NOT gate logic circuit U3. The power interface is respectively connected with the NAND gate logic circuit U2 and the NOT gate logic circuit U3 to supply power to the detection unit. The test needle is connected to the power interface through the current-limiting resistor.

The 14 PINs of the quick connector seat of the D-type 14PIN connector are numbered in the same way as the 14 PINs of the corresponding quick connector. The 14 pins of the quick connecting seat are divided into 7 groups according to two groups, wherein

pins

1 and 8 are a first group, pins 2 and 9 are a second group, pins 3 and 10 are a third group,

pins

4 and 11 are a fourth group,

pins

5 and 12 are a fifth group, pins 6 and 13 are a sixth group, and pins 7 and 14 are a seventh group. For each group of pins in the pin groups (namely the first, third, fifth and seventh groups) connected to the cable in the extension line, electric signals in the two pins in the group are respectively input to the nand gate logic circuit U2 in the detection unit, and an output signal is obtained after nand logic operation, and is used as the input of the not gate logic circuit U3 and as the control signal of the corresponding indicator lamp after the phase inversion of the not gate logic circuit U3. And the signals corresponding to the groups of pins of the cable wire connected to the extension line are independent when the signals are input into the NAND gate logic circuit and the NOT gate logic circuit. For each pin in the pin group (i.e. the second, fourth and sixth groups) which is not connected to the cable in the extension line, two pins in the group are led out to the same node after being connected and welded with the pins connected and welded in other double-array groups, the node is connected with one input of the not gate logic circuit U3, and the signal from the same node is output after being inverted in the not gate logic circuit U3 so as to control the alarm.

Specifically, in this embodiment, as shown in fig. 3, the nand gate logic circuit U2 and the not gate logic circuit U3 are implemented by using a 74HC00N nand gate chip and a 74HC04 not gate chip, respectively, and both the two chips have mutually independent sets of input and output, which can meet the requirement that signals related to each set of pins in the present application can be processed separately. The

PINs

1 and 8 in the first group of PINs of the D-type 14PIN connector quick socket correspond to the red cable lines in fig. 1, and are respectively connected to the PINs 4B and 4A of the nand gate logic circuit U2, signals input from the PINs 4A and 4B are output from the PIN 4Y of U2 after being subjected to nand operation, and are transmitted to the PIN 4A of U3 as inputs, and are output from the PIN 4Y of U3 after being subjected to logic not operation in U3 to control the red indicator light, as shown in fig. 3. Similarly, PINs 3 and 10 in the third group of PINs of the D-type 14PIN connector quick connector correspond to the black cable lines in fig. 1, are respectively connected to PINs 3B and 3A of the nand gate logic circuit U2, and signals input from PINs 3A and 4B are output from PIN 3Y of U2 after being subjected to nand operation, and are transferred to PIN 3A of U3 as input, and are output from PIN 3Y of U3 after being subjected to logic not operation in U3, so as to control the black indicator light.

Pins

5 and 12 in the fifth group of pins correspond to green cable lines in fig. 1, are respectively connected to pins 2B and 2A of the nand gate logic circuit U2, output signals input from pins 2A and 2B through nand operation from pin 2Y of U2, are transmitted as input to pin 2A of U3, and output through logic not operation in U3 from pin 2Y of U3 to control a green indicator light; pins 7 and 14 in the seventh group of pins correspond to the white cable wires in fig. 1, are respectively connected to pins 1B and 1A of the nand gate logic circuit U2, output signals input from pins 1A and 1B from pin 1Y of U2 after nand computation, are transmitted as input to pin 1A of U3, and output from pin 1Y of U3 after logical not computation in U3 to control the white indicator light;

pins

2, 9, 4, 11, 6 and 13 in the second, fourth and sixth groups of pins are led out to reach a common node and then are all connected to a pin 5A of the NOT gate logic circuit U3, and a signal input from the pin 5A is output from a pin 5Y of U3 after logical negation in U3 so as to control the alarm. The test pin and the power interface are respectively connected with VCC pins of a 74HC00N NAND gate chip and a 74HC04 NOT gate chip.

In addition, as shown in fig. 3, in order to control the input and output potentials of the nand gate logic circuit and the not gate logic circuit, 14 pins of the fast pad are grounded through corresponding first to ninth voltage dividing resistors R1 to R9, wherein the

pins

2, 4, 6, 9, 11, and 13 share the ninth voltage dividing resistor, and the test pin is connected to the VCC pin through the series current limiting resistor R10.

The detection of the red cable line is taken as an example to illustrate various detection results, and the detection of the cable lines of other colors is the same as the red line.

If the welding is normal: when the red cable line touches the testing needle on the testing device, the high level of

pins

13 and 14 of the nand gate chip 74HC00N is high, the low level of pin 12 is output to pin 9 of the not gate chip 74HC04, the high level of pin 8 of the not gate chip 74HC04 is output, the red light emitting diode is driven to light, and the red cable line is qualified in the test.

If the tested red cable wire does not short-circuit the 1 and 8 pins of the quick connector together during welding, the cold solder joint or the solder leakage occurs: when the red cable line touches a test needle on the test device, at least one pin of 13 and 14 of the NAND gate chip 74HC00N is in low level, 12 pins can only output high level to the 9 th pin of the NOT gate chip 74HC04, and the 8 th pin of the NOT gate chip 74HC04 outputs low level, so that the red light-emitting diode cannot be lightened, and the red cable line to be tested is prompted to have insufficient soldering or missing soldering, and the test is unqualified.

If the tested red cable is in short circuit by tin connection between the 1 and 8 pins and the adjacent 2 and 9 pins of the quick connector during welding: when the red cable conductor touches the testing needle on the testing device, the red light-emitting diode is normally lightened, at the moment, the 11 th pin of the NOT gate chip 74HC04 obtains high level, the 10 th pin outputs low level, the buzzer is conducted and gives a sound alarm to prompt that the red cable conductor to be tested has a continuous welding short circuit, and the test is unqualified.

It should be noted that the above description of the embodiments is merely exemplary. In other embodiments, the color of each cable in the extension line can be replaced by other colors, and even the same color is adopted for all the cables; the color of the indicator light is not necessarily identical to the color of the corresponding cable. In addition, the nand gate logic circuit U2 and the not gate logic circuit U3 may be implemented by other types of nand gate and not gate chips/circuits capable of implementing nand operation and not operation.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A welding defect detection device for a quick-connection extension line of a sensor cable comprises 4 cables, wherein one ends of the 4 cables are respectively in welding connection with a 1 st PIN and an 8 th PIN, a 3 rd PIN and a 10 th PIN, a 5 th PIN and a 12 th PIN, and a 7 th PIN and a 14 th PIN of a quick connector of a D-type 14PIN connector, and the other ends of the 4 cables are free ends; characterized in that, extension line welding defect detection device includes: the test device comprises a test needle, a detection unit, a D-type 14PIN connector quick connection seat respectively connected with the detection unit, 4 indicator lamps, an alarm and a power interface, wherein the 4 indicator lamps, the alarm and the power interface are in one-to-one correspondence with the 4 cables; the test needle is connected with the power interface;

during testing, the quick connector of the D-type 14PIN connector is inserted into the quick connector seat of the D-type 14PIN connector, and the free ends of the 4 cables are respectively taken out to touch the testing needle; the detection unit receives electric signals from 14 PINs in the D-type 14PIN connector quick-connection seat and respectively controls the indicator light and the alarm.

2. The sensor cable quick-connection extension line welding defect detection device of claim 1, wherein the detection unit comprises a nand gate logic circuit and a not gate logic circuit;

the NAND gate logic circuit at least comprises 4 groups of independent input and output paths and a first power supply end, and each group of input and output paths of the NAND gate logic circuit comprises two input ports and one output port; the NOT gate logic circuit at least comprises 5 groups of independent input and output paths and a second power supply end, and each group of input paths of the NOT gate logic circuit comprises an input port and an output port; the first power supply end and the second power supply end are both connected to the power interface;

among the 14 PINs of the D-type 14PIN connector quick connection seat, 8 PINs in four rows connected with 4 cables are respectively connected with 8 input ports of 4 groups of input and output channels of the NAND gate logic circuit, and the same row of PINs is connected with the input ports of the same input and output channel; 4 output ports of the NAND gate logic circuit are connected with 4 input ports of 4 groups of input and output paths of the NOT gate logic circuit, and 4 output ports of the 4 groups of input and output paths of the NOT gate logic circuit are respectively connected with 4 indicator lamps;

in the 14 PINs of the D-type 14PIN connector quick connection seat, 6 PINs in three rows which are not connected with 4 cables are all connected to the input port of another group of input and output channels except the 4 groups of input and output channels in the NOT gate logic circuit, and the output port of the other group of input and output channels is connected with the alarm.

3. The sensor cable quick-connect extension wire welding defect detection device of claim 2, wherein the nand gate logic circuit is implemented by a 74HC00N nand gate chip, and the not gate logic circuit is implemented by a 74HC04 not gate chip.

4. The sensor cable quick-connect extension line welding defect detection device of claim 2, wherein the power interface is connected with the nand gate logic circuit and the not gate logic circuit respectively.

5. The sensor cable line quick-connect extension wire welding defect detection device of claim 1, wherein 14 PINs in the D-type 14PIN connector quick-connect socket are also grounded via corresponding voltage-dividing resistors respectively; the test pin is connected to the power interface via a series resistance.