CN117233578A - PCB high-impedance performance detection equipment and system - Google Patents

Abstract

The invention belongs to the technical field of detection equipment, in particular to high-impedance performance detection equipment and a system for a PCB, wherein the high-impedance performance detection equipment comprises a conveying belt, and an impedance detection device is arranged on the conveying belt; a control cabinet is arranged on one side of the conveying belt; according to the invention, the rotating direction of the placing box is set to be in the direction of the positioning plate approaching to the conveying belt, and each time the placing box rotates, the positioning plate rotates in the direction of the positioning plate approaching to the conveying belt, so that the purpose that the positioning plate is kept under the rotating shaft during working is achieved, the positioning plate is aligned to support and set off each time in the process of turning over the PCB, the positioning plate is kept aligned to the corner of the positioning plate even if the PCB is turned over, and the positioning of the PCB can be completed again only by mirroring the positioning plate after the PCB is turned over, so that the positioning step after the PCB is simplified, the subsequent impedance detection duration of the PCB is reduced, and the impedance detection efficiency is improved.

Description

PCB high-impedance performance detection equipment and system

Technical Field

The invention belongs to the technical field of detection equipment, and particularly relates to equipment and a system for detecting high-impedance performance of a PCB.

Background

In the detection type of the PCB, the PCB impedance detection is used for checking whether the impedance of the PCB meets the design requirement; as the frequency of the signal on the PCB becomes higher and higher, noise and waveform distortion on the signal become major factors affecting the signal integrity; if the impedance of the PCB is not satisfactory, signal reflection and signal loss can result, thereby affecting signal integrity; thus, PCB impedance testing is an important step in ensuring electrical performance of the PCB.

The basic principle of impedance testing is to inject a low frequency signal into the circuit and then measure the effect of the signal passing through the circuit. If the impedance of a circuit is not uniform, the signal is affected, resulting in loss of signal. In order to obtain the most accurate result, the impedance test needs to use a special impedance test device;

in the production process of a large number of PCB boards, in order to ensure the high impedance performance of the electrical property of each PCB board, impedance detection needs to be carried out on each PCB board; in the prior art, in order to cope with the impedance detection work of a large amount of PCBs, usually select the detection equipment that conveyor and detection device combine as an organic wholely, the workman places the PCB board and carries in conveyor, and detection device detects it in the PCB board transportation process and judges to reach high-efficient detection.

However, in the daily detection process, the PCB needs to be held by a worker and placed in the conveying device, and the worker possibly contaminates impurities such as dust on the PCB in the process of holding the PCB, and the PCB contaminated with the impurities has unqualified impedance or short circuit in the power-on process of impedance detection, so that the impedance detection effect of the PCB is reduced due to the influence of external factors; and if detect two-sided PCB board in a large number, need the workman frequent upset PCB board in the testing process, and after overturning the PCB board, just need to pinpoint the check point on the PCB board immediately, prolong the impedance detection duration of PCB board, lead to detection efficiency to reduce.

Disclosure of Invention

In order to make up for the deficiency of the prior art, solve the above-mentioned technical problem; the invention provides a device and a system for detecting high-impedance performance of a PCB.

The technical scheme adopted for solving the technical problems is as follows: the invention provides a high-impedance performance detection device for a PCB (printed circuit board), which comprises a conveyer belt, wherein an impedance detection device is arranged on the conveyer belt; a control cabinet is arranged on one side of the conveying belt; the conveyor belt further comprises:

the air pump is arranged on one side of the conveying belt, and a dust collection device is arranged on the other side of the conveying belt;

the supporting plates are arranged on the conveyor belt in pairs; a rotating shaft is rotatably connected between the adjacent supporting plates, and the rotating shaft is arranged in a hollow mode; a first motor is arranged on one side of the supporting plate and is connected with the outer surface of the rotating shaft; one end, far away from the first motor, of the rotating shaft is communicated with the air pump, and one end, close to the first motor, of the rotating shaft is communicated with the dust collection device;

the placing box is fixedly connected between the adjacent rotating shafts, the upper end face and the lower end face of the placing box are hinged with cover plates, and a rubber cushion is arranged on one side, facing the inside of the placing box, of the cover plates; a positioning plate is arranged on one side, facing the inside of the placement box, of the cover plate, and the positioning plates are mutually aligned; the placing box is characterized in that a second motor is uniformly arranged on one side of the placing box and connected with the cover plate, and the second motor is used for driving the cover plate to rotate.

Preferably, the surface of the positioning plate is smooth; the rotating angle of the placement box is the same, and the rotating direction of the placement box is set to be close to the direction of the conveying belt by the positioning plate.

Preferably, a cavity is formed in the cover plate, and an elastic air bag is arranged at the bottom in the cavity; a sliding groove is uniformly formed in one side, facing the inside of the placement box, of the cover plate, and a sliding block is connected in the sliding groove in a sliding manner; an air inlet channel is formed in the inner wall of the placement box and is communicated with the inside of the rotating shaft close to the air pump; the elastic air bag is characterized in that an air vent nozzle is arranged at one end of the elastic air bag, the air vent nozzle is clamped with one end of the air inlet channel, and sealing treatment is carried out between the air vent nozzle and the cavity.

Preferably, one end of the sliding block, which is far away from the cavity, is provided with an extrusion block, and the extrusion block is made of antistatic rubber.

Preferably, the extrusion blocks are located on the sliding blocks and are uniformly distributed, and a space is arranged between every two adjacent extrusion blocks.

Preferably, an electromagnetic valve is arranged at a position, close to the air pump, in the rotating shaft; trigger switches are arranged on the upper end face and the lower end face of the placement box.

Preferably, an air outlet channel is uniformly arranged at one end of the placement box opposite to the air inlet channel, and the inside of the cavity is communicated with the air outlet channel; the cover plate is positioned between adjacent sliding grooves and provided with air suction holes, the air suction holes are communicated with the cavities, and sealing treatment is carried out between the cavities and the sliding grooves.

Preferably, one side of the placement box is uniformly provided with telescopic rods, the output ends of the telescopic rods penetrate through the inner wall of the placement box and are connected with brushes, and the brushes are in sliding connection with the inner wall of the placement box; and a vent valve is arranged at a position, close to the dust collection device, in the rotating shaft.

Preferably, a warning lamp is arranged in the middle of the supporting plate, and the warning lamp is connected with the impedance detection device.

The detection system is suitable for the PCB high-impedance performance detection equipment, and specifically comprises a control transmission unit, a rectifying and filtering unit, an operation unit, a parameter unit, a voltage stabilizing control unit, a digital display unit and a logic analysis unit;

the control transmission unit is used for controlling the detection system to operate according to the set logic; the rectification filter unit is used for carrying out integration filtering on the current input into the PCB and then reading actual data in the PCB; the operation unit is used for operating the actual data in the PCB according to the set parameters in the parameter unit; the parameter unit is used for providing qualified impedance parameters of the detected PCB; the voltage stabilizing control unit is used for performing voltage stabilizing control on the electric signals in the PCB; the digital display unit is used for displaying actual impedance data of the PCB; the logic analysis unit is used for carrying out comparison analysis on the data of the operation unit.

The beneficial effects of the invention are as follows:

1. according to the PCB high-impedance performance detection equipment and the system, after one surface of the double-sided PCB is detected by the impedance detection device, the control cabinet controls the second motor of the upper cover plate to work, the second motor takes the placing box as a fixed point, the upper side cover plate is driven to rotate, the upper end surface of the placing box is closed, and the positioning plate in the upper side cover plate and the positioning plate in the lower side cover plate are in contact and aligned; the control cabinet controls the motor I to work, and the motor I drives the placing box to be communicated with the upper side cover plate and the lower side cover plate to rotate 180 degrees together, so that the upper side cover plate and the lower side cover plate are mutually exchanged in position, the effect that the double-sided PCB plate is turned over together with the upper side cover plate is achieved, the influence caused by human misoperation is reduced, and the impedance detection effect is improved.

According to the PCB high-impedance performance detection equipment and system, the rotating direction of the placement box is set to be close to the direction of the conveying belt by the positioning plate, and the positioning plate rotates in the direction close to the conveying belt when the placement box rotates, so that the purpose that the positioning plate is kept below the rotating shaft during operation is achieved, the positioning plate is aligned to support and set off each time in the process of turning over the PCB, the positioning plate is kept aligned to the corner of the positioning plate even if the PCB is turned over, the positioning mirror image is needed after the PCB is turned over, the positioning of the PCB can be completed again, the positioning step after the PCB is turned over is simplified, the subsequent impedance detection time of the PCB is shortened, and the impedance detection efficiency is improved.

Drawings

The invention is further described below with reference to the accompanying drawings.

Fig. 1 is a perspective view of a high impedance performance detecting apparatus of the present invention;

fig. 2 is a perspective view showing an opened state of the set forth invention;

fig. 3 is a perspective view showing a closed state of the placement box in the present invention;

FIG. 4 is a cross-sectional view of the invention in front view of the placement box;

FIG. 5 is a side view in cross section of the placement box of the present invention;

FIG. 6 is an enlarged view of a portion of FIG. 4 at A;

in the figure: the device comprises a conveying belt 1, an impedance detection device 11, a control cabinet 12, an air pump 13, a dust collection device 14, a supporting plate 2, a rotating shaft 21, a first motor 22, a warning lamp 23, a placement box 3, a second motor 31, an air inlet channel 32, an air outlet channel 33, a telescopic rod 34, a hairbrush 35, a cover plate 4, a rubber pad 41, a positioning plate 42, a cavity 43, an elastic air bag 44, a sliding groove 45, a sliding block 46, an air nozzle 47, an extrusion block 48 and an air suction hole 49.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Embodiment one:

in the production process of a large number of PCB boards, in order to ensure the high impedance performance of the electrical property of each PCB board, impedance detection needs to be carried out on each PCB board; in the prior art, in order to cope with the impedance detection work of a large number of PCBs, detection equipment which is formed by combining a conveying device and a detection device is generally selected, a worker places the PCBs into the conveying device for conveying, and the detection device detects and judges the PCBs in the conveying process of the PCBs so as to achieve efficient detection;

however, in the daily detection process, the PCB needs to be held by a worker and placed in the conveying device, and the worker possibly contaminates impurities such as dust on the PCB in the process of holding the PCB, and the PCB contaminated with the impurities has unqualified impedance or short circuit in the power-on process of impedance detection, so that the impedance detection effect of the PCB is reduced due to the influence of external factors; and if detect two-sided PCB board in a large number, need the workman frequent upset PCB board in the testing process, and after overturning the PCB board, just need to pinpoint the check point on the PCB board immediately, prolong the impedance detection duration of PCB board, lead to detection efficiency to reduce.

In order to effectively solve the problems, as shown in figures 1-6 in the drawings of the specification, the high-impedance performance detection equipment for the PCB comprises a conveying belt 1, wherein the conveying belt 1 is a conventional conveying device in the field; the conveyer belt 1 is provided with an impedance detection device 11, and the impedance detection device 11 is a conventional impedance detection instrument in the field; a control cabinet 12 is arranged on one side of the conveyor belt 1, the control cabinet 12 controls the conveyor belt 1 to work, and the conveyor belt 1 is controlled to be matched with the impedance detection device 11; the conveyor belt 1 further includes:

the air pump 13, the air pump 13 is set up in one side of the conveyor belt 1, and the other side of the conveyor belt 1 has dust-collecting equipment 14; the air pump 13 is a conventional air blowing device such as an air pressure pump; the suction device 14 is a conventional suction device, such as a vacuum cleaner;

the support plates 2 are arranged on the conveyor belt 1 in pairs; a rotating shaft 21 is rotatably connected between the adjacent support plates 2, and the rotating shaft 21 is hollow; a first motor 22 is arranged on one side of the supporting plate 2, and the first motor 22 is connected with the outer surface of the rotating shaft 21; one end, far away from the first motor 22, of the rotating shaft 21 is communicated with the air pump 13, and one end, close to the first motor 22, is communicated with the dust collection device 14;

the placing box 3 is fixedly connected between the adjacent rotating shafts 21, the upper end face and the lower end face of the placing box 3 are hinged with cover plates 4, a rubber pad 41 is arranged on one side of the cover plates 4, facing the inside of the placing box 3, of the rubber pad 41, and the special antistatic rubber pad 41 for PCB detection is selected as the rubber pad 41; a positioning plate 42 is arranged on one side of the cover plate 4 facing the inside of the placement box 3, and the positioning plates 42 are aligned with each other; a second motor 31 is uniformly arranged on one side of the placement box 3, the second motor 31 is connected with the cover plate 4, and the second motor 31 is used for driving the cover plate 4 to rotate; the first motor 22 is selected from the types of self-powered and signal control functions; the first motor 22 is used for driving the placement box 3 to turn over; the second motor 31 is used for driving the cover plate 4 to turn over, so as to open the placement box 3; the number of the cover plates 4 on each placement box 3 is two, and in a standing state, the cover plates 4 positioned on the upper end face of the placement box 3 are upper side cover plates 4, and the cover plates 4 positioned on the lower end face of the placement box 3 are lower side cover plates 4; the side of the cover plate 4 facing the inside of the placement box 3 is an inner surface, and the side of the cover plate 4 facing the outside of the placement box 3 is an outer surface;

the surface of the positioning plate 42 is smooth; the rotating angle of the placement box 3 is 180 degrees, and the rotating direction of the placement box 3 is set to be the direction of approaching the conveyer belt 1 by the positioning plate 42; each time the placement box 3 rotates, the positioning plate 42 rotates in a direction approaching the conveyor belt 1, so that the purpose that the positioning plate 42 is kept below the rotating shaft 21 during operation is achieved;

the specific working flow is as follows: in the process of loading and placing the double-sided PCB, a worker can place the PCB in the cover plate 4 by using a loading device, such as a loading robot, and the upper side cover plate 4 is close to the support plate 2 and is in an open state; the lower side cover plate 4 is far away from the supporting plate 2, in a closed state, the inner surface of the lower side cover plate 4 is positioned in the placing box 3, the PCB is placed on the inner surface of the lower side cover plate 4, and the corners of the PCB are aligned with the corners of the positioning plate 42; then the conveyer belt 1 drives the supporting plate 2 to move, the supporting plate 2 drives the placing box 3 to approach the impedance detection device 11 through the rotating shaft 21, the air pump 13 blows air into the rotating shaft 21 at one side of the placing box 3 through an air pipe in the process of gradually approaching the impedance detection device 11, the rotating shaft 21 blows air into the PCB in the placing box 3, and the rotating shaft 21 at the other end of the placing box 3 is matched with the action of sucking air through the dust suction device 14, so that air forms a fixed flow track in the placing box 3, dust on the PCB is taken away when the air blows across the surface of the PCB, the cleaning degree of the surface of the PCB is improved, the contact or sensitive part of the surface of the PCB is prevented from being influenced by impurities, and the misjudgment is caused, thereby improving the efficiency of high impedance performance detection of the PCB;

after the impedance detection device 11 detects one surface of the double-sided PCB, the control cabinet 12 controls the motor No. two 31 of the upper cover plate 4 to work, the motor No. two 31 takes the placing box 3 as a fixed point, drives the upper side cover plate 4 to rotate, closes the upper end surface of the placing box 3, and the positioning plate 42 in the upper side cover plate 4 and the positioning plate 42 in the lower side cover plate 4 are in contact and aligned with each other; the control cabinet 12 controls the motor No. 22 to work, the motor No. 22 drives the placing box 3 to be communicated with the upper side cover plate 4 and the lower side cover plate 4 to rotate 180 degrees together, so that the positions of the upper side cover plate 4 and the lower side cover plate 4 are mutually exchanged, the effect that the double-sided PCB is turned over together with the upper side cover plate 4 is achieved, the influence caused by manual operation errors is reduced, and the impedance detection effect is improved;

because the rotating direction of the placement box 3 is set to be in the direction that the positioning plate 42 is close to the conveyor belt 1, and the positioning plate 42 rotates in the direction that the positioning plate 42 is close to the conveyor belt 1 whenever the placement box 3 rotates, the purpose that the positioning plate 42 is kept below the rotating shaft 21 during operation is achieved, so that the positioning plate 42 is aligned to support and set off each time in the process of turning over the PCB, the PCB is kept aligned with the corners of the positioning plate 42 even if the PCB is turned over, after the PCB is turned over, the positioning of the PCB according to the positioning plate 42 is facilitated, the positioning step after the PCB is turned over is simplified, the subsequent impedance detection duration of the PCB is reduced, and the impedance detection efficiency is improved;

further, by arranging the surface smoothing treatment of the positioning plate 42, the movement friction force of the PCB moving from the lower cover plate 4 to the inner surface of the upper cover plate 4 along the surface of the positioning plate 42 in the overturning process is reduced, so that the movement is smoother, and the dimensional accuracy of the PCB after overturning is ensured;

after the overturning of the PCB is completed, the positions of the upper side cover plate 4 and the lower side cover plate 4 are exchanged at the moment, the control cabinet 12 controls the lower side cover plate 4 to rotate through the second motor 31, the placement box 3 is opened, the surface of the overturned PCB is exposed, then the detection system detects the PCB again, and the rubber pad 41 plays an antistatic role on the PCB, so that the detection result is prevented from being influenced by static electricity; finally, finishing impedance detection work of the double-sided PCB; in addition, through the mutually supporting of upper side cover 4 and lower side cover 4 for the PCB board is in the testing process, need not the workman to intervene, can let the workman possess more time and observe impedance testing result, improves check out test set's practicality.

Embodiment two:

on the basis of the first embodiment, a cavity 43 is formed in the cover plate 4, and an elastic air bag 44 is arranged at the inner bottom of the cavity 43; a sliding groove 45 is uniformly formed in one side, facing the inside of the placement box 3, of the cover plate 4, a sliding block 46 is connected in a sliding manner in the sliding groove 45, and a reset spring is arranged between the sliding block 46 and the sliding groove 45; an air inlet channel 32 is formed in the inner wall of the placement box 3, and the air inlet channel 32 is communicated with the inside of the rotating shaft 21 close to the air pump 13; one end of the elastic air bag 44 is provided with an air vent nozzle 47, the air vent nozzle 47 is mutually clamped with one end of the air inlet channel 32, and the air vent nozzle 47 and the cavity 43 are sealed; the air inlets 32 of the two cover plates 4 are communicated with each other; the number of the air inlets 32 is two, and the air inlets are communicated with each other;

the end of the slider 46 away from the cavity 43 is provided with a squeezing block 48, and the squeezing block 48 is made of antistatic rubber, such as silica gel;

the extrusion blocks 48 are uniformly distributed on the sliding blocks 46, and a space is arranged between every two adjacent extrusion blocks 48;

a solenoid valve is arranged in the rotating shaft 21 at a position close to the air pump 13; trigger switches are arranged on the upper end face and the lower end face of the placement box 3, and the number of the trigger switches is two; the electromagnetic valve is an electromagnetic control piece for normally controlling on-off of the gas pipeline, the trigger switch is a control component for normally matching with the valve switch, the trigger switch can be a pressure sensor, a pressure signal is detected through the pressure sensor and is sent to the control cabinet 12, and the switch of the electromagnetic valve is controlled through the control cabinet 12; when the trigger switches of the upper end face and the lower end face are triggered, the air pump 13 is started; when one of the trigger switches is turned off, the air pump 13 is turned off;

the specific working flow is as follows: the motor 31 drives the upper side cover plate 4 to rotate, the upper end face of the placing box 3 is closed, at the moment, both the upper side cover plate 4 and the lower side cover plate 4 touch trigger switches, the trigger switches control the electromagnetic valve to be opened through the control cabinet 12, the air pump 13 charges air into the rotating shaft 21 on the side close to the electromagnetic valve, and when one of the upper side cover plate 4 and the lower side cover plate 4 rotates to open the placing box 3, the electromagnetic valve is closed, and air supply in the rotating shaft 21 is blocked; by the cooperation of the trigger switch and the electromagnetic valve, the air pump 13 still keeps fixed air pressure at one side of the electromagnetic valve when the electromagnetic valve is cut off; when the electromagnetic valve is opened, the air pump 13 can supply air into the rotating shaft 21 immediately, the steps of starting, compressing air, conveying air and the like are not needed to supply air into the rotating shaft 21, the response speed of air flow entering the rotating shaft 21 is improved, the expansion speed of the elastic air bag 44 is accelerated, the response speed of the slide block 46 for clamping the PCB board through the extrusion block 48 is promoted, and the overturning efficiency is improved;

if the PCB is not clamped in the overturning process, the displacement possibility of the PCB can occur, so that the subsequent positioning operation steps are increased, and the impedance detection efficiency of the PCB is affected; therefore, when the upper side cover plate 4 and the lower side cover plate 4 are closed, the ventilation nozzle 47 extends into the air inlet channel 32, the electromagnetic valve is opened, the rotating shaft 21 inflates the elastic air bag 44 through the air inlet channel 32 and the ventilation nozzle 47, the elastic air bag 44 inflates, the extrusion sliding block 46 slides towards the inside of the placement box 3 along the sliding groove 45, the sliding block 46 drives the extrusion block 48 to move and extend out of the sliding groove 45 and contact the PCB, at the moment, the extrusion block 48 in the upper side cover plate 4 and the extrusion block 48 in the lower side cover plate 4 clamp the PCB in an up-down extrusion mode, so that the stability in the overturning process of the PCB is improved, the subsequent positioning is accelerated, and the impedance detection efficiency of the PCB is improved;

because the extrusion block 48 is arranged, and the extrusion block 48 is made of silica gel, the silica gel can maintain insulativity, has excellent antistatic property, has high elasticity and skid resistance, and can slide in the overturning process of the extrusion block 48 in the process of clamping the PCB, and the rigid contact between the sliding block 46 and the PCB is changed into flexible contact, so that the surface of the PCB is prevented from being damaged by the sliding block 46; in addition, the extrusion blocks 48 are uniformly distributed on the sliding blocks 46, and the intervals are arranged between the adjacent extrusion blocks 48, so that when the PCBs with different sizes are detected, part of the extrusion blocks 48 are contacted with the PCBs and elastically deformed, the rest extrusion blocks 48 which are not contacted with the PCBs are contacted with each other and are attached to the edges of the PCBs, the shaking clearance of the PCBs is reduced, the extrusion blocks contacted with the PCBs are matched, the anti-slip effect is achieved on the PCBs, the stability of the PCBs in the overturning process is improved, the subsequent positioning is accelerated, and the impedance detection efficiency of the PCBs is improved;

when a worker installs the electromagnetic valve, a pressure relief valve can be additionally arranged at a position between the electromagnetic valve and the placement box 3 in the rotating shaft 21, when the elastic air bag 44 is inflated for a long time and is in contact with the inner wall of the top in the cavity 43, the elastic air bag 44 is not inflated under the influence of the space in the cavity 43, the pressure state in the elastic air bag 44 is reduced through the pressure relief valve, and the possibility of damage caused by overlarge air pressure in the elastic air bag 44 is avoided;

after the placement box 3 is turned over, the upper side cover plate 4 and the lower side cover plate 4 are mutually changed in position, the lower side cover plate 4 is positioned at the upper side at the moment, the motor 31 drives the lower side cover plate 4 to turn over and open the placement box 3, the air vent nozzle 47 is far away from the air inlet channel 32, one of the two trigger switches is not started, the electromagnetic valve is closed, the rotating shaft 21 does not charge air to the air inlet channel 32 any more, the elastic air bag 44 in the lower side cover plate 4 discharges internal air through the air vent nozzle 47 and reduces, the elastic air bag 44 in the upper side cover plate 4 discharges internal air through the air vent nozzle 47 and the air inlet channel 32 because the electromagnetic valve is in a closed state, the elastic air bag 44 does not squeeze the sliding block 46 any more, the sliding block 46 is influenced by a reset spring, the extrusion block 48 is driven to retract into the sliding groove 45 again, and the PCB is enabled to rest on the rubber pad 41 on the inner surface of the cover plate 4; through setting up the elasticity gasbag 44, and the inflation and the shrink of elasticity gasbag 44 are progressive process, can not appear suddenly holding the condition that opens the PCB board and appear to this mode protects the PCB board.

Embodiment III:

on the basis of the second embodiment, the air outlet channel 33 is uniformly arranged at one end of the placement box 3 opposite to the air inlet channel 32, and a sealing ring is arranged in one end of the air outlet channel 33, so that the air tightness of the junction between the interior of the cavity 43 and the air outlet channel 33 is ensured; the cover plate 4 is positioned between the adjacent sliding grooves 45, an air suction hole 49 is formed, the air suction hole 49 is communicated with the cavity 43, and sealing treatment is carried out between the cavity 43 and the sliding grooves 45; the number of the air outlet channels 33 is two and communicated with each other;

the telescopic rods 34 are uniformly arranged on one side of the placement box 3, the output ends of the telescopic rods 34 penetrate through the inner wall of the placement box 3 and are connected with the hairbrushes 35, the hairbrushes 35 are in sliding connection with the inner wall of the placement box 3, and the telescopic rods 34 are electric telescopic rods 34 with power supplies; the hairbrush 35 is of a special type for cleaning the PCB; a vent valve is arranged in the rotating shaft 21 at a position close to the dust collection device 14; the vent valve is connected with the trigger switch, is a conventional on-off gas path valve, and is closed when both trigger switches are started, and the gas outlet path 33 stops inhaling; when one of the two trigger switches is started, the vent valve is opened, and the air outlet channel 33 starts to suck air;

the specific working flow is as follows: when the placing box 3 is in a closed state, the cover plate 4 contacts the trigger switch, the air vent valve is closed, and the air outlet channel 33 stops sucking air; when the placing box 3 is in a one-section open state, one of the two trigger switches is started, the vent valve is opened, the air outlet channel 33 starts to inhale, the air outlet channel 33 positioned above the rotating shaft 21 inhales the surface of the PCB, the air outlet channel 33 positioned below the rotating shaft 21 inhales the air in the cavity 43, the cavity 43 inhales through the air suction holes 49, and the air suction holes 49 adsorb the PCB placed on the inner surface of the cover plate 4, so that the stability of the PCB in the conveying process is improved, displacement in the moving process is avoided, and the impedance detection efficiency of the PCB is improved;

in addition, when the upper cover plate 4 is opened from the closed state, the control cabinet 12 controls the output end of the telescopic rod 34 to extend and retract, the telescopic rod 34 drives the hairbrush 35 to reciprocally clean the surface of the PCB, and the dust on the surface of the PCB is sucked away by matching with the suction state of the air outlet channel 33, so that the cleaning degree of the surface of the PCB is maintained, and the impedance detection effect of the PCB is improved.

Embodiment four:

on the basis of the third embodiment, a warning lamp 23 is arranged in the middle of the supporting plate 2, and the warning lamp 23 is connected with the impedance detection device 11;

the specific working flow is as follows: the unqualified PCB impedance detection factors are various, and part of unqualified PCB impedance detection can be analyzed and processed to improve the impedance performance of the PCB, so that the PCB becomes a qualified product, and workers are required to collect the unqualified PCB in time; therefore, through setting up warning light 23, and warning light 23 is connected with impedance detection device 11, when impedance detection device 11 detects that one of them PCB board of placing in box 3 is unqualified, impedance detection device 11 control warning light 23 twinkle, makes things convenient for the workman to in time discover the unqualified PCB board of impedance detection to take off it from placing in box 3 through the instrument, improve check out test set's practicality.

Fifth embodiment:

the detection system is suitable for the PCB high-impedance performance detection equipment, and specifically comprises a control transmission unit, a rectifying and filtering unit, an operation unit, a parameter unit, a voltage stabilizing control unit, a digital display unit and a logic analysis unit, wherein the units are matched with each other through operation logic in the prior art;

starting the detection equipment, placing the PCB into the placement box 3 by the feeding device, and controlling the conveying belt 1 to convey the PCB by the control cabinet; the impedance detection device detects the PCB by a TDR test method;

the rectification filter unit performs integrated filtering on the current input into the PCB, reads actual data in the PCB, and the operation unit performs operation by taking the parameter unit as a comparison, and the voltage stabilizing control unit performs voltage stabilizing control on the electric signal in the PCB; the arithmetic unit uploads the arithmetic result to the logic analysis unit, and the logic analysis unit sends the final data to the digital display unit and the control transmission unit respectively;

the digital display unit displays final data of the impedance performance detection of the PCB; after the logic analysis unit reports the result to the control transmission unit, the control transmission unit judges whether the impedance of the PCB accords with high performance through the reporting result, then controls the warning lamp 23 to flash or not, and finally completes the high impedance performance detection of the PCB;

the foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. The high-impedance performance detection equipment for the PCB comprises a conveying belt (1), wherein an impedance detection device (11) is arranged on the conveying belt (1); a control cabinet (12) is arranged on one side of the conveying belt (1); characterized in that the conveyor belt (1) further comprises:

the air pump (13), the said air pump (13) is set up in one side of said conveyer belt (1), and the another side of the conveyer belt (1) has dust-collecting equipment (14);

the support plates (2) are arranged on the conveying belt (1) in pairs; a rotating shaft (21) is rotatably connected between the adjacent supporting plates (2), and the rotating shaft (21) is arranged in a hollow mode; a first motor (22) is arranged on one side of the supporting plate (2), and the first motor (22) is connected with the outer surface of the rotating shaft (21); one end, far away from the first motor (22), of the rotating shaft (21) is communicated with the air pump (13), and one end, close to the first motor (22), of the rotating shaft is communicated with the dust collection device (14);

the storage box (3) is fixedly connected between the adjacent rotating shafts (21), the upper end face and the lower end face of the storage box (3) are hinged with cover plates (4), and one side, facing the storage box (3), of each cover plate (4) is provided with a rubber pad (41); a positioning plate (42) is arranged on one side, facing the inside of the placement box (3), of the cover plate (4), and the positioning plates (42) are mutually aligned; the placing box is characterized in that a second motor (31) is uniformly arranged on one side of the placing box (3), the second motor (31) is connected with the cover plate (4), and the second motor (31) is used for driving the cover plate (4) to rotate.

2. The PCB board high impedance performance testing apparatus of claim 1, wherein: the surface of the positioning plate (42) is smooth; the rotating angle of the placement box (3) is 180 degrees, and the rotating direction of the placement box (3) is set to be close to the direction of the conveying belt (1) by the locating plate (42).

3. The PCB board high impedance performance testing apparatus of claim 1, wherein: a cavity (43) is formed in the cover plate (4), and an elastic air bag (44) is arranged at the inner bottom of the cavity (43); a sliding groove (45) is uniformly formed in one side, facing the inside of the placement box (3), of the cover plate (4), and a sliding block (46) is connected in the sliding groove (45) in a sliding manner; an air inlet channel (32) is formed in the inner wall of the placement box (3), and the air inlet channel (32) is communicated with the inside of a rotating shaft (21) close to the air pump (13); one end of the elastic air bag (44) is provided with an aeration nozzle (47), the aeration nozzle (47) is mutually clamped with one end of the air inlet channel (32), and sealing treatment is carried out between the aeration nozzle (47) and the cavity (43).

4. A PCB board high impedance performance testing apparatus according to claim 3, wherein: one end of the sliding block (46) far away from the cavity (43) is provided with an extrusion block (48), and the extrusion block (48) is made of antistatic rubber.

5. The PCB board high impedance performance testing apparatus of claim 4, wherein: the extrusion blocks (48) are uniformly distributed on the sliding blocks (46), and a space is arranged between every two adjacent extrusion blocks (48).

6. The PCB board high impedance performance testing apparatus of claim 1, wherein: an electromagnetic valve is arranged at a position, close to the air pump (13), in the rotating shaft (21), and a pressure relief valve is arranged at one side, located at the electromagnetic valve, in the rotating shaft (21); trigger switches are arranged on the upper end face and the lower end face of the placement box (3).

7. The PCB board high impedance performance testing apparatus of claim 1, wherein: an air outlet channel (33) is uniformly arranged at one end of the placement box (3) opposite to the air inlet channel (32), and the inside of the cavity (43) is communicated with the air outlet channel (33); the cover plate (4) is positioned between adjacent sliding grooves (45) and provided with air suction holes (49), the air suction holes (49) are communicated with the cavity (43), and sealing treatment is carried out between the cavity (43) and the sliding grooves (45).

8. The PCB board high impedance performance testing apparatus of claim 7, wherein: a telescopic rod (34) is uniformly arranged on one side of the placement box (3), the output end of the telescopic rod (34) penetrates through the inner wall of the placement box (3) and is connected with a brush (35), and the brush (35) is in sliding connection with the inner wall of the placement box (3); and a vent valve is arranged at a position, close to the dust collection device (14), in the rotating shaft (21).

9. The PCB board high impedance performance testing apparatus of claim 1, wherein: the middle part of the supporting plate (2) is provided with a warning lamp (23), and the warning lamp (23) is connected with the impedance detection device (11).

10. A system for detecting high impedance performance of a PCB board, wherein the detection system is adapted to the apparatus for detecting high impedance performance of a PCB board according to any one of claims 1 to 9, and the detection system specifically comprises a control transmission unit, a rectifying and filtering unit, an operation unit, a parameter unit, a voltage stabilizing control unit, a digital display unit and a logic analysis unit;

the control transmission unit is used for controlling the detection system to operate according to the set logic; the rectification filter unit is used for carrying out integration filtering on the current input into the PCB and then reading actual data in the PCB; the operation unit is used for operating the actual data in the PCB according to the set parameters in the parameter unit; the parameter unit is used for providing qualified impedance parameters of the detected PCB; the voltage stabilizing control unit is used for performing voltage stabilizing control on the electric signals in the PCB; the digital display unit is used for displaying actual impedance data of the PCB; the logic analysis unit is used for carrying out comparison analysis on the data of the operation unit.