CN210514590U

CN210514590U - B2B connector assembly in-place detection device

Info

Publication number: CN210514590U
Application number: CN201921233972.XU
Authority: CN
Inventors: 王海来
Original assignee: Intelligent Automation Equipment Zhuhai Co Ltd
Current assignee: Intelligent Automation Equipment Zhuhai Co Ltd; Intelligent Automation Zhuhai Co Ltd
Priority date: 2019-08-01
Filing date: 2019-08-01
Publication date: 2020-05-12
Anticipated expiration: 2029-08-01

Abstract

The utility model provides a simple structure, with low costs, test are quick and can connect the assembly in advance and whether correctly target in place's B2B connector assembly detection device targets in place. The utility model discloses a compare reference voltage source (1), two comparators (2), AND gate judgement (3) and phase inverter (4), voltage of two differences of comparison reference voltage source (1) input respectively to two comparator (2), two the output of comparator (2) with AND gate judgement (3) are connected, AND gate judgement (3) with phase inverter (4) are connected, phase inverter (4) output test result shows, two test needle (5) have been drawn forth respectively to the inverting terminal of comparator (2), two test needle (5) are connected to respectively on the metal shell fragment at the both ends of the B2B connector that awaits measuring. The utility model discloses can be applied to the test field.

Description

B2B connector assembly in-place detection device

Technical Field

The utility model relates to a test field especially relates to a B2B connector assembly detection device that targets in place.

Background

The B2B connector is widely used in small mobile terminal products, in which there are a large number of B2B connectors on a PCBA (printed circuit board assembly), and the PCBA must connect some functional peripherals through the B2B connector when performing functional tests of the PCBA. The manner of assembly is largely automatic, typically by a pin block connected to a B2B socket on the PCBA, and manual, i.e., manually operated, to snap the peripheral end and the PCBA end together by B2B, depending on the method of testing. In the case of a PCBA test, the entire operation is repeated continuously. However, in either test mode, reliable connection of the connector is very important. However, due to the compact structure and small size of the connector, abnormal connection is easy to occur due to repeated operation, and particularly, misplaced connection is easy to occur due to manual connection, so that the difference between correct connection and wrong connection can be clearly seen in an assembly drawing of the connector shown in fig. 1. When the dislocation connection occurs, the short circuit of the circuit board is easily caused when the system is powered on, even the whole system is damaged, and great loss is brought.

At present, no scientific and economic method exists for testing the assembly of the B2B connector, and whether the connection is in place or not can be identified by using the technologies of boundary scanning, open-short circuit testing and the like after the B2B is assembled and before the tested product is powered on. But the boundary scanning has high cost, high technical requirement and poor universality; the technical method of the open-short circuit test needs means such as instruments, the test time is long, and if the test points to be verified are more, the test time is prolonged.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that overcome prior art not enough, provide a simple structure, with low costs, the test is quick and can connect whether correctly target in place's B2B connector assembly detection device that targets in place of assembly in advance early warning.

The utility model adopts the technical proposal that: the device comprises a comparison reference voltage source, two comparators, an AND gate judgment and an inverter, wherein the comparison reference voltage source inputs two different voltages to the two comparators respectively, the output ends of the two comparators are connected with the AND gate judgment, the AND gate judgment is connected with the inverter, the inverter outputs a test result to display, test needles are led out from the inverting ends of the two comparators respectively, and the two test needles are connected to metal elastic pieces at two ends of a B2B connector to be tested respectively.

According to the scheme, in the test process of the B2B connector, different voltages are introduced to the comparator through a comparison reference voltage source, the test pins are led out from the inverting end of the comparator and connected to the metal elastic pieces at the two ends of the B2B connector to be tested, when the male seat and the female seat of the B2B connector are buckled together, if the connector is well connected, the metal elastic pieces on the connector are in short connection, the two test pins are at the same potential, the output pins of the two comparators output two high levels, and after the two high levels are simultaneously input to an AND gate judgment logic for comparison, the output pin of the AND gate judgment outputs a high level; if any pin of the two test pins is in poor contact due to assembly or other reasons, a low level is output, so that before power-on, whether the B2B connector is normally buckled can be quickly detected, early warning is given out in advance, and the condition that the circuit board is damaged is avoided; the structure is simple and the cost is low.

Further, the comparison reference voltage sources comprise two groups of 150mV reference voltage sources and two groups of 300mV reference voltage sources, and the 150mV reference voltage sources and the 300mV reference voltage sources both comprise operational amplifiers, and the model of each operational amplifier is LM 358. Therefore, the two groups of reference voltage source inputs which are the same can ensure that the voltages loaded by the two test pins are the same, and the comparability and the reliability of the test result are ensured.

Still further, the comparator is a differential voltage comparator, whose model is LM 339. Therefore, the characteristics of small offset voltage, wide voltage range, large common mode range, flexible selection of output end potential and the like of the four-circuit differential voltage comparator are utilized to ensure that the whole device has better reliability and higher efficiency.

Still further, the inverter is connected with an LED early warning indicator lamp. Therefore, through the arrangement of the LED early warning indicator lamp, the quick and reliable feedback can be visually and conveniently provided for detection personnel, and when the B2B is connected and abnormal, the quick response can be quickly realized.

And finally, the phase inverter is externally connected with an MCU. Therefore, the output result of the inverter can be sent to the MCU through the connection arrangement of the MCU, reference is provided for background control personnel through MCU early warning and message notification, and events can be recorded.

Drawings

FIG. 1 is a schematic illustration of the normal and abnormal assembly of the B2B connector;

FIG. 2 is a schematic view of the lower needle of the testing needle of the present invention;

FIG. 3 is a simplified connection block diagram of the present invention;

FIG. 4 is a circuit schematic of a 150mV reference voltage source;

FIG. 5 is a circuit schematic of a 300mV reference voltage source;

FIG. 6 is a circuit schematic of the comparator;

FIG. 7 is a circuit schematic of the AND gate judgment;

fig. 8 is a circuit schematic of the inverter.

Detailed Description

As shown in fig. 1 to 8, the utility model discloses a comparison reference voltage source 1, two comparators 2, AND gate judge 3 and phase inverter 4, comparison reference voltage source 1 inputs two different voltages respectively to two comparator 2, two the output of comparator 2 with the AND gate is judged 3 and is connected, the AND gate judge 3 with phase inverter 4 connects, phase inverter 4 output test result shows, two the reverse phase end of comparator 2 has drawn forth test pin 5, two respectively test pin 5 is connected to the metal bomb at the both ends of the B2B connector that awaits measuring respectively. The comparison reference voltage source 1 comprises two groups of 150mV reference voltage sources and two groups of 300mV reference voltage sources, the 150mV reference voltage sources and the 300mV reference voltage sources both comprise operational amplifiers, and the model of each operational amplifier is LM 358. The comparator 2 is a differential voltage comparator with model number LM 339. The phase inverter 4 is connected with an LED early warning indicator lamp. The phase inverter 4 is also externally connected with an MCU.

The utility model discloses introduce the comparator with two way 150mV and 300 mV's voltage source respectively, and take two way test needles out from the inverting terminal of comparator, as shown in fig. 3, AJ _ GND1 and AJ _ GND2 are the test point of needle down. Test points are respectively arranged on metal elastic pieces at two ends of a B2B connector, when two B2B connectors are buckled together, if the connectors are connected well, the metal elastic pieces on the connectors can be short-circuited, AJ _ GND1 and AJ _ GND2 are at the same electric potential, then the 1 pin, the 2 pin AJ _ OUT1 and the AJ _ OUT2 of the LM339 can output two high levels, after the two high levels are simultaneously input into an AND gate judgment logic for comparison, the output end OUT1 can output a high level, as shown in FIG. 7, if any pin of the AJ _ GND1 and the J _ GND2 is in poor contact due to assembly or other reasons, the OUT1 can output a low level. The level signal output by the and gate judgment is finally sent to the inverter, as shown in fig. 8, the finally output signal OUT1 can be used for driving the LED warning indicator light, and can also be sent to the MCU of the test fixture to perform warning and message notification and perform event recording, so as to achieve protection.

The utility model discloses a technique is that just accomplished the short circuit test of opening when PCBA connects other peripheral hardware, is just can early warning in advance before being surveyed the system and do not go up the electricity, has done the detection of B2B before going up the electricity and can shorten test time greatly, improves efficiency of software testing, and this test can the exclusive use, need not be with the help of the detection of instrument and equipment.

Claims

1. A B2B connector assembly in-place detection device characterized in that: the device comprises a comparison reference voltage source (1), two comparators (2), an AND gate judgment (3) and a phase inverter (4), wherein the comparison reference voltage source (1) inputs two different voltages to the two comparators (2), the output ends of the two comparators (2) are connected with the AND gate judgment (3), the AND gate judgment (3) is connected with the phase inverter (4), the phase inverter (4) outputs a test result to be displayed, the reverse phase ends of the two comparators (2) are respectively led out to form test needles (5), and the two test needles (5) are respectively connected to metal spring pieces at two ends of a B2B connector to be tested.

2. A B2B connector fitting position detecting device according to claim 1, wherein: the comparison reference voltage source (1) comprises two groups of 150mV reference voltage sources and two groups of 300mV reference voltage sources, the 150mV reference voltage sources and the 300mV reference voltage sources both comprise operational amplifiers, and the model of each operational amplifier is LM 358.

3. A B2B connector fitting position detecting device according to claim 1, wherein: the comparator (2) is a differential voltage comparator with the model number LM 339.

4. A B2B connector fitting position detecting device according to claim 1, wherein: the phase inverter (4) is connected with an LED early warning indicator lamp.

5. A B2B connector fitting position detecting device according to claim 4, wherein: the phase inverter (4) is also externally connected with an MCU.