A test apparatus for cable harnesses

Abstract

The utility model discloses a kind of test equipment for cable electrical installation belongs to cable electrical installation test technical field, this test equipment can be used to test optical machine / whole machine cable electrical installation and the contact piece cable electrical installation of PCBA, this test equipment includes: equipment interface, test cable, relay matrix card, digital program-controlled multimeter, test probe pen and industrial computer, wherein, cable electrical installation is connected with test equipment by test cable;Relay matrix card automatically switches two measured points in the connector end of optical machine / whole machine cable electrical installation and one measured point in the connector end of the contact piece cable electrical installation of PCBA, to form test loop;Digital program-controlled multimeter automatically measures the impedance value of test loop;Industrial computer obtains test result by comparing measured value with preset impedance test table.The test equipment of the utility model avoids the subjectivity of artificial visual judgment, easy to overlook and easy to misjudge problem, greatly improves the accuracy and efficiency of cable electrical installation test.

Description

Technical Field

[0001] This utility model relates to the field of cable electrical assembly testing technology, and more specifically, to a testing device for cable electrical assemblies. Background Technology

[0002] In the aerospace environment, the cabling connections inside the integrated electrical box face stringent and unique requirements. Due to the extremely high standards of aerospace equipment regarding structural compactness and vibration and shock resistance, the cabling connections between the PCBA (Printed Circuit Board Assembly) and connectors within the integrated electrical box cannot rely solely on plug-in connectors, a common connection method in ordinary industrial settings. This means that all connections must be achieved through secondary electrical soldering of the cables, firmly bonding them to the PCBA and connectors at connection points to ensure that the connections do not loosen or fail due to environmental factors during spaceflight.

[0003] The situation is even more complex for the electrical assembly of electronic components such as optomechanical systems and complete systems. To meet the precise requirements of aerospace equipment regarding overall size, layout, and cable length, it is often necessary to cut the original connecting cables of electronic components. Technicians then need to re-solder the cut cables to the corresponding connectors according to the actual length requirements. However, this secondary electrical assembly and soldering process harbors a significant risk of cable sequence errors. The position of each connection point and the connection sequence of each cable can deviate due to minor oversights during the operation, leading to a disorder in the entire electrical assembly system's wiring sequence.

[0004] Even more alarming is that in electrical assembly work under such aerospace conditions, the accuracy of electrical soldering cannot be judged by performance testing after power-on. This is because any wiring sequence error can lead to serious consequences the moment power is applied: at best, it can cause circuit overload, resulting in damage to related components due to excessive current; at worst, it can cause a short circuit, with the instantaneous surge of current rapidly burning out delicate electronic components. This would not only cause huge economic losses but could also affect the smooth progress of the entire space mission and even endanger the safety of space equipment and astronauts.

[0005] Faced with this dilemma, existing testing methods have significant limitations. For example, the current common practice for assembling PCBA connectors and cables involves two people working together, using the continuity function of a multimeter for testing. Technicians need to touch each connection point and corresponding connector pin on the PCBA with the multimeter probes, observing whether the multimeter displays continuity to determine if the cable connection is correct. While this method can detect continuity issues to some extent, it is extremely inefficient. Furthermore, for complex PCBA boards with numerous connection points, human error can easily lead to missed incorrect wiring sequences, failing to ensure comprehensiveness and accuracy of the test.

[0006] For optical / mechanical / system cable electrical components, due to their unique structural design, the connection points at the top of the components are completely encased within the components or located in inaccessible positions, making it impossible for technicians to directly test the cable continuity using tools such as multimeters. In such cases, technicians must rely on visual inspection, comparing the wiring sequence with a pre-defined wiring table to manually determine if the cable connections are correct. However, this method of visual inspection is highly subjective and easily affected by factors such as the technician's experience, fatigue, and concentration. Especially when dealing with a large number of cables of similar color and specifications, misjudgments are highly likely, compromising the accuracy of electrical component soldering and posing a significant hidden danger to the safe operation of aerospace equipment. Utility Model Content

[0007] To address the issues of low efficiency and easy omissions in existing cable assembly testing methods, which require two people to perform continuity tests on PCBA connector cables one by one using a multimeter, and the low efficiency and easy misjudgment in optical / mechanical / complete machine cable assemblies due to the difficulty in contacting the connection points, this utility model proposes a testing device for cable assemblies.

[0008] According to one aspect of this utility model, a testing device for cable electrical assembly is provided, wherein the cable electrical assembly is specifically an optomechanical cable electrical assembly or a complete machine cable electrical assembly, and the optomechanical cable electrical assembly or complete machine cable electrical assembly has a connector end. The testing device includes: a device interface, a test cable, a relay matrix card, a digital programmable multimeter, and an industrial control computer, wherein one end of the test cable is adapted to the device interface, and the other end of the test cable is adapted to the connector end of the optomechanical cable electrical assembly or complete machine cable electrical assembly under test; the input end of the relay matrix card is electrically connected to the... The device interface and the industrial control computer are described above. The output terminal of the relay matrix card is electrically connected to the digital programmable multimeter. The digital programmable multimeter is electrically connected to the industrial control computer and is used to measure the impedance value of the first test circuit and transmit the measured impedance value to the industrial control computer. The first test circuit is formed by two selected test points from the connector terminals of the test equipment and the optomechanical cable electrical assembly or the complete machine cable electrical assembly under test. The industrial control computer is configured to control the relay matrix card and the digital programmable multimeter, and output the test result based on the preset impedance test meter and the measured impedance value.

[0009] In accordance with the above, as a further solution, the testing equipment also includes a display connected to an industrial control computer for displaying the test results.

[0010] In accordance with the above, as a further embodiment, the testing equipment also includes a chassis for mounting the relay matrix card.

[0011] In accordance with the above, as a further embodiment, the testing equipment also includes a cabinet for mounting the industrial control computer, the digital programmable multimeter, the chassis, and the monitor.

[0012] As a further option, based on the above aspects, the preset impedance test table is editable.

[0013] According to another aspect of this utility model, a testing device for cable assembly is proposed, wherein the cable assembly is specifically a contact cable assembly of a PCBA, the contact cable assembly of the PCBA having a connector end and a cable-PCB connection point. The testing device includes: a device interface, a test cable, a relay matrix card, a digital programmable multimeter, a test probe, and an industrial computer. One end of the test cable is adapted to the device interface, and the other end of the test cable is adapted to the connector end of the contact cable assembly of the PCBA under test. The input end of the relay matrix card is electrically connected to the device interface and the industrial computer, and the output end of the relay matrix card is electrically connected to the digital programmable multimeter. The test probe is electrically connected to the digital programmable multimeter and is used to contact a cable-PCB connection point of the contact cable assembly of the PCBA under test in a preset continuity test sequence each time. The digital programmable multimeter is electrically connected to the industrial control computer and is used to measure the impedance value of the second test circuit and transmit the measured impedance value to the industrial control computer. The second test circuit is formed by the test equipment, a cable-PCB connection point of the contact cable assembly of the PCBA under test, and a test point corresponding to the cable-PCB connection point in the connector end of the contact cable assembly of the PCBA under test. The industrial control computer is configured to control the relay matrix card and the digital programmable multimeter and output the test results.

[0014] In accordance with the above, as a further solution, the testing equipment also includes a display connected to an industrial control computer for displaying the test results.

[0015] In accordance with the above, as a further solution, the testing equipment also includes a PCBA positioning and fixing device for positioning and fixing the PCBA.

[0016] In accordance with the above, as a further embodiment, the testing equipment also includes a chassis for mounting the relay matrix card.

[0017] In accordance with the above, as a further embodiment, the testing equipment also includes a cabinet for fixing the industrial control computer, digital programmable multimeter, chassis, display, and PCBA positioning and fixing device.

[0018] The beneficial effects of this utility model are as follows: 1. According to the present invention, the testing equipment for cable electrical assembly can automatically switch the test points according to the preset impedance test table via a relay matrix card, and automatically measure the impedance value by a digital programmable multimeter. The industrial control computer then compares the measured value with the impedance test table to obtain the test result, avoiding the subjectivity and easy omissions of manual visual judgment, greatly improving the accuracy and efficiency of testing cable electrical assembly for optical and mechanical systems, and reliably ensuring the accuracy of electrical assembly soldering, effectively reducing the risk of component damage caused by incorrect wiring sequence.

[0019] 2. According to the testing equipment for cable electrical assembly of this utility model, for the contact cable electrical assembly of PCBA, the test probe is used to contact the cable-PCB connection point according to the preset continuity test sequence. The test point is switched by the relay matrix card, and the impedance value is measured by the digital programmable multimeter. The industrial control computer judges the continuity of the circuit and whether the impedance is qualified, which avoids the problem of easy misjudgment and greatly improves the accuracy and efficiency of testing the contact cable electrical assembly of PCBA.

[0020] 3. According to the present invention, the impedance test table of the test equipment for cable electrical assembly is editable and is in the form of a table that can be freely added, deleted or modified. This facilitates the rapid addition and deletion of test items, and the subsequent tooling design can be quickly compatible with the development of new products, improving the compatibility with subsequent products, thereby reducing the overall production cost during mass production.

[0021] 4. The testing equipment for cable electrical assembly according to this utility model integrates core components such as industrial control computer, digital programmable multimeter, and relay matrix card in the cabinet, and is equipped with a display for displaying test results. This makes the equipment compact and easy to operate, which is convenient for technicians to use in aerospace equipment manufacturing, maintenance and other scenarios, and improves the overall convenience and operability of the testing work.

[0022] 5. The testing equipment for cable electrical assembly according to this utility model adopts the form of equipment interface + matching test cable, which can achieve compatibility with different test interfaces and eliminate the need to replace test equipment components for subsequent new products. Attached Figure Description

[0023] Figure 1 This is an overall structural diagram of the testing equipment for cable electrical assembly according to this utility model.

[0024] Figure 2 This is a schematic block diagram of a test device for cable assembly according to the present invention, which is used when the cable assembly is a contact cable assembly of a PCBA.

[0025] Figure 3 This is an example of electrical assembly of PCBA contact cables.

[0026] Explanation of reference numerals in the attached diagram: 1. Cabinet; 2. Industrial PC; 3. Digital programmable multimeter; 4. Relay matrix card; 5. Equipment interface; 6. Monitor; 7. Cable-PCB connection point. Detailed Implementation

[0027] like Figure 1 As shown, in one embodiment of this utility model, a testing device for cable assembly is provided. The cable assembly can be an optomechanical / complete machine cable assembly or a PCBA contact cable assembly. The difference between the two types of cable assemblies is that the optomechanical / complete machine cable assembly only has a connector end, while the PCBA contact cable assembly has a connector end and a cable-PCB connection point 7 (also known as the upper solder point of the assembly). Figure 3 This is an example of electrical assembly of PCBA contact cables. This utility model discloses a testing device for optomechanical / complete device cable electrical assembly, comprising: a device interface 5, a test cable, a relay matrix card 4, a digital programmable multimeter 3, and an industrial computer 2. One end of the test cable is adapted to the device interface 5, and the other end of the test cable is adapted to the connector end of the optomechanical / complete device cable electrical assembly under test. The input end of the relay matrix card 4 is electrically connected to the device interface 5 and the industrial computer 2, and the output end of the relay matrix card 4 is electrically connected to the digital programmable multimeter 3. The digital programmable multimeter 3 is electrically connected to the industrial computer 2 and is used to measure the impedance value of a first test circuit and transmit the measured impedance value to the industrial computer 2. The first test circuit is formed by the testing device and two test points in the connector end of the optomechanical / complete device cable electrical assembly under test. The industrial computer 2 is configured to automatically switch the relay matrix card 4 to the two test points in the connector end of the optomechanical / complete device cable electrical assembly under test according to a preset impedance test table, and make a judgment based on the impedance test table and the measured impedance value from the digital programmable multimeter 3 to generate a first test result. In this embodiment, the industrial computer 2 can, for example, convey the first test result to the tester via a beeping sound.

[0028] Specifically, device interface 5 can use circular aviation connectors or other types of connectors. The test equipment can use a flanged connector as a female connector, and one end of the test cable can be a connector paired with device interface 5 as a male connector. The relay controller in relay matrix card 4 switches the measured points.

[0029] According to this utility model, the testing equipment for optical / mechanical / complete machine cable electrical assembly can automatically switch the test points through the relay matrix card 4 according to the preset impedance test table, and the digital programmable multimeter 3 automatically measures the impedance value. The industrial control computer 2 then compares the measured value with the preset table to obtain the test result. This avoids the subjectivity and easy omission of manual visual judgment, greatly improves the accuracy and efficiency of testing optical / mechanical / complete machine cable electrical assembly, and can reliably ensure the accuracy of electrical assembly soldering, effectively reducing the risk of component damage caused by incorrect wiring sequence.

[0030] In another embodiment of the present invention, the test equipment for optical / mechanical / complete machine cable electrical assembly of the present invention further includes a display 6, which is electrically connected to the industrial control computer 2 and is used to display the first test result.

[0031] In this embodiment of the invention, the impedance test table is editable, meaning it can be freely added to, deleted from, or modified. When test requirements are updated, only the impedance test table needs to be changed, without replacing the hardware. This facilitates the rapid addition and deletion of test items, and allows for quick compatibility of subsequent tooling designs with new product development, improving compatibility with subsequent products and thus reducing overall production costs during mass production.

[0032] In embodiments of this utility model, the testing equipment for optical / mechanical / complete machine cable electrical assembly further includes a cabinet 1 and a chassis. The chassis is a chassis that matches the relay matrix card 4 and is used to fix the relay matrix card 4. The cabinet 1 is used to fix the industrial control computer 2, the digital programmable multimeter 3, the chassis, and the display 6. The industrial control computer 2, the digital programmable multimeter 3, and the chassis can be fixed inside the cabinet 1 by embedding, end slots, and threaded fastening. The display 6 can be mounted on the cabinet 1 by a fixing bracket and can rotate within a certain angle range. The device interface 5 can be fixed to the test platform plane of the cabinet 1 by positioning holes and screws.

[0033] In an embodiment of this utility model, a testing device for electrical assembly of contact cables in PCBA is provided, such as... Figure 2As shown, it includes: a device interface 5, a test cable, a relay matrix card 4, a digital programmable multimeter 3, a test probe, and an industrial computer 2. One end of the test cable is adapted to the device interface 5, and the other end is adapted to the connector end of the contact cable assembly of the PCBA under test. The input end of the relay matrix card 4 is electrically connected to the device interface 5 and the industrial computer 2, and the output end of the relay matrix card 4 is electrically connected to the digital programmable multimeter 3. The test probe is electrically connected to the digital programmable multimeter 3 and is used to contact one cable-PCB connection point 7 of the contact cable assembly of the PCBA under test according to a preset continuity test sequence. The digital programmable multimeter 3 is electrically connected to the industrial computer 2 and is used to measure the impedance value of the second test circuit and transmit the measured impedance value to the industrial computer 2. The second test circuit is composed of a test... The equipment, a cable-PCB connection point 7 of the contact cable assembly of the PCBA under test, and a test point corresponding to the cable-PCB connection point 7 in the connector end of the contact cable assembly of the PCBA under test are formed. The industrial control computer 2 is configured to automatically switch the relay matrix card 4 to the test point corresponding to the cable-PCB connection point 7 in the connector end of the contact cable assembly of the PCBA under test before the test probe touches the cable-PCB connection point 7 each time according to the preset continuity test sequence, thereby determining whether the second test circuit is continuous, and generating a second test result when it is not continuous, and judging the measured impedance value of the second test circuit based on the preset impedance value qualification judgment range when it is continuous, so as to generate a third test result.

[0034] According to the present invention, the testing equipment for the electrical assembly of PCBA contact cables can, according to a preset continuity test sequence, use a test probe to contact a cable-PCB connection point 7, and switch the test point in the connector end of the PCBA contact cable electrical assembly corresponding to the cable-PCB connection point 7 through the relay matrix card 4. Combined with the digital programmable multimeter 3 to measure the impedance value, the industrial control computer 2 judges the continuity of the circuit and whether the impedance is qualified, avoiding the problem of easy misjudgment and greatly improving the accuracy and efficiency of testing PCBA contact cable electrical assemblies.

[0035] In another embodiment of the present invention, the test equipment for the electrical assembly of contact cables of PCBA further includes a display 6, which is electrically connected to the industrial control computer 2, for displaying the second test result or the third test result.

[0036] In another embodiment of the present invention, the test equipment for the electrical assembly of contact cables of PCBA further includes a PCBA positioning and fixing device for positioning and fixing the PCBA.

[0037] In another embodiment of this utility model, the testing equipment for the electrical assembly of PCBA contact cables further includes a cabinet 1 and a chassis. The chassis is a chassis that matches the relay matrix card 4 and is used to fix the relay matrix card 4. The cabinet 1 is used to fix the industrial control computer 2, the digital programmable multimeter 3, the chassis, the display 6, and the PCBA positioning and fixing device. The industrial control computer 2, the digital programmable multimeter 3, and the chassis can be fixed inside the cabinet 1 by embedding, end slots, and threaded fastening. The display 6 can be mounted on the cabinet 1 by a fixing bracket and can rotate within a certain angle range. The device interface 5 and the PCBA positioning and fixing device can be fixed to the test platform plane of the cabinet 1 by positioning holes and screws.

[0038] According to the present invention, the testing equipment for cable electrical assembly integrates core components such as industrial control computer 2, digital programmable multimeter 3, and relay matrix card 4 in cabinet 1, and is equipped with display 6 for displaying test results. This makes the equipment compact and easy to operate, and facilitates its use by technicians in aerospace equipment manufacturing, maintenance and other scenarios, thereby improving the overall convenience and operability of the testing work.

[0039] In an embodiment of this utility model, the testing method for optomechanical / complete machine cable electrical assembly includes the following steps: connecting the optomechanical / complete machine cable electrical assembly to be tested to the device interface 5 of the testing equipment via a test cable; starting the testing equipment and selecting the first test mode; the industrial control computer 2 causes the relay matrix card 4 to automatically switch to two test points in the connector end of the optomechanical / complete machine cable electrical assembly to be tested according to the preset impedance test table, while the digital programmable multimeter 3 automatically measures the impedance value of the first test circuit and transmits the measured impedance value to the industrial control computer 2; the industrial control computer 2 compares the measured impedance value received from the digital programmable multimeter 3 with the preset impedance test table to generate the first test result.

[0040] In an embodiment of this utility model, the testing method for the contact cable electrical assembly of a PCBA includes the following steps: connecting the contact cable electrical assembly of the PCBA under test to the device interface 5 of the testing equipment via a test cable; starting the testing equipment and selecting the second test mode; using a test probe to contact one cable-PCB connection point 7 of the contact cable electrical assembly of the PCBA under test in a preset continuity test sequence each time; before the test probe contacts one cable-PCB connection point 7 in the preset continuity test sequence each time, the industrial control computer 2 causes the relay matrix card 4 to automatically switch to a test point corresponding to one cable-PCB connection point 7 in the connector end of the contact cable electrical assembly of the PCBA under test, and at the same time, the digital programmable multimeter 3 automatically measures the impedance value of the second test circuit and transmits the measured impedance value to the industrial control computer 2; the industrial control computer 2 determines whether the second test circuit is continuous, and generates a second test result if it is not continuous, and compares the measured impedance value received from the digital programmable multimeter 3 with the preset impedance value qualification range if it is continuous, so as to generate a third test result.

Claims

1. A testing device for cable electrical components, wherein the cable electrical component is specifically an optomechanical cable electrical component or a complete machine cable electrical component, the optomechanical cable electrical component or the complete machine cable electrical component having a connector end, characterized in that, include: Equipment interfaces, test cables, relay matrix cards, digital programmable multimeters, and industrial control computers, among which, One end of the test cable is adapted to the interface of the device, and the other end of the test cable is adapted to the connector end of the optomechanical cable assembly or the complete machine cable assembly under test. The input terminal of the relay matrix card is electrically connected to the device interface and the industrial control computer, and the output terminal of the relay matrix card is electrically connected to the digital programmable multimeter. The digital programmable multimeter is electrically connected to the industrial control computer and is used to measure the impedance value of the first test circuit and transmit the measured impedance value to the industrial control computer. The first test circuit is formed by two selected test points from the connector terminals of the test equipment and the optomechanical cable electrical assembly or the complete machine cable electrical assembly under test. The industrial control computer is configured to control the relay matrix card and the digital programmable multimeter, and outputs the test results based on the preset impedance test meter and the measured impedance value.

2. The testing equipment for cable electrical assembly according to claim 1, characterized in that, It also includes a display, which is connected to an industrial control computer, for displaying the test results.

3. The testing equipment for cable electrical assembly according to claim 2, characterized in that, It also includes a chassis for mounting the relay matrix card.

4. The testing equipment for cable electrical assembly according to claim 3, characterized in that, It also includes a cabinet for mounting the industrial control computer, digital programmable multimeter, chassis and display.

5. The testing equipment for cable electrical assembly according to claim 4, characterized in that, The preset impedance test table is editable.

6. A testing device for cable assembly, wherein the cable assembly is specifically a contact cable assembly for a PCBA, the contact cable assembly for the PCBA having a connector end and a cable-PCB connection point, characterized in that, include: Equipment interfaces, test cables, relay matrix cards, digital programmable multimeters, test probes, and industrial control computers, among which... One end of the test cable is adapted to the device interface, and the other end of the test cable is adapted to the connector end of the contact cable of the PCBA under test. The input terminal of the relay matrix card is electrically connected to the device interface and the industrial control computer, and the output terminal of the relay matrix card is electrically connected to the digital programmable multimeter. The test probe is electrically connected to the digital programmable multimeter and is used to contact one cable-PCB connection point of the contact cable of the PCBA under test in a preset continuity test sequence each time. The digital programmable multimeter is electrically connected to the industrial control computer and is used to measure the impedance value of the second test circuit and transmit the measured impedance value to the industrial control computer. The second test circuit is formed by the test equipment, a cable-PCB connection point of the contact cable of the PCBA under test, and a test point in the connector end of the contact cable of the PCBA under test that corresponds to the cable-PCB connection point. The industrial control computer is configured to control the relay matrix card and the digital programmable multimeter, and output the test results.

7. The testing equipment for cable electrical assembly according to claim 6, characterized in that, It also includes a display, which is connected to an industrial control computer, for displaying the test results.

8. The testing equipment for cable electrical assembly according to claim 7, characterized in that, It also includes a PCBA positioning and fixing device for positioning and fixing the PCBA.

9. The testing equipment for cable electrical assembly according to claim 8, characterized in that, It also includes a chassis for mounting the relay matrix card.

10. The testing equipment for cable electrical assembly according to claim 9, characterized in that, It also includes a cabinet for fixing the industrial control computer, digital programmable multimeter, chassis, display and PCBA positioning and fixing device.

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