CN115144810B

CN115144810B - Intelligent ammeter testing device and method

Info

Publication number: CN115144810B
Application number: CN202211062864.7A
Authority: CN
Inventors: 吴伟
Original assignee: Shenzhen Ruizhitong Technology Co ltd
Current assignee: Shenzhen Ruizhitong Technology Co ltd
Priority date: 2022-08-31
Filing date: 2022-08-31
Publication date: 2022-11-15
Anticipated expiration: 2042-08-31
Also published as: CN115144810A

Abstract

The invention belongs to the technical field of ammeter testing equipment, and particularly relates to an intelligent ammeter testing device and method. According to the invention, the brush ring can brush the surface of the probe in a reciprocating manner, so that the probe can be automatically cleaned, the air collecting cylinder blows airflow to the surface of the PCBA of the intelligent electric meter to blow away dust attached to the surface of the PCBA, the stability and accuracy of a test result are further ensured, the rotation of the lead screw is used as a driving force, so that the conveying belt is intermittently conveyed forwards, and all functional components are closely matched and linked, so that the improvement of the working efficiency is facilitated.

Description

Intelligent ammeter testing device and method

Technical Field

The invention belongs to the technical field of ammeter testing equipment, and particularly relates to a testing device and method for an intelligent ammeter.

Background

In order to adapt to the use of a smart grid and new energy, the smart meter has intelligent functions such as bidirectional multi-rate metering function, user side control function, bidirectional data communication function of multiple data transmission modes, electricity larceny prevention function and the like, a PCBA circuit board is a core component of the smart meter, the quality of the PCBA circuit board directly influences the performance of the meter, and due to various possible factors of equipment and operators, the PCBA produced is difficult to be guaranteed to be a good product, so that test equipment is required to detect the PCBA of the smart meter, parameters and output are guaranteed to meet design requirements, and the problem that the bad product does not flow into a next process is guaranteed.

Through the retrieval, national patent publication No. CN106443418A discloses an automatic testing arrangement of smart electric meter PCBA, major structure includes the base, crosses the wire casing, the switch, the pilot lamp, the circuit board, accept the seat, the mount pad, a connecting plate, a slide rail, no. two connecting plates, the needle bed, lift cylinder and bar code rifle, can test smart electric meter PCBA's 2 way consumption, 8 way voltages, infrared communication, RS485 communication, carrier communication, the number of times of uncapping, brake lamp and alarm lamp projects and gather the bar code and carry out data and trace back.

The above scheme still has the following disadvantages:

1. in the testing process, workers need to manually place the PCBAs of the intelligent electric meters to be tested at the detection positions in sequence and manually take out the PCBAs after the detection is finished, so that the workload is large, continuous testing work is not facilitated, and the detection efficiency is not high;

2. in the test work of the PCBA of the intelligent electric meter, the surface of the probe is easily shielded and covered by impurities such as dust, oil stains and the like, so that the probe is not in contact with a test point in place, and the stability of a test result is influenced;

3. this scheme does not possess location and fixed function to smart electric meter PCBA, and when the test, smart electric meter PCBA leads to the offset because of factors such as equipment vibrations or artificial maloperation easily, and causes the inaccurate problem of test to take place.

Disclosure of Invention

The invention aims to provide a device and a method for testing an intelligent ammeter, aiming at the problems of low detection efficiency, poor test stability and poor test accuracy in the background technology.

In order to achieve the purpose, the invention adopts the following technical scheme: a testing device for an intelligent ammeter comprises a supporting frame and a probe, wherein the supporting frame comprises two side plates which are arranged in parallel and a top plate fixedly connected to the side plates, a hydraulic cylinder is mounted on the supporting frame, a needle bed is fixed at the output end of the hydraulic cylinder, the probe is arranged at the bottom of the needle bed, a cleaning box is arranged between the two side plates in a sliding mode, a cleaning mechanism for cleaning the probe is arranged in the cleaning box, a detection table is mounted between the two side plates, and a conveying belt is arranged in the middle of the detection table;

the cleaning mechanism comprises a vibrating plate which is arranged in the cleaning box in a sliding mode, the vibrating plate is connected to the inner top surface of the cleaning box through an electromagnetic spring, brush rings matched with the probes are embedded in the vibrating plate, soft bristles are embedded in the inner walls of the brush rings, and a power-on mechanism used for connecting an electromagnetic spring circuit is arranged on the cleaning box;

the probe cleaning device comprises a probe, a needle bed and a power-on mechanism, wherein the power-on mechanism comprises a protective sleeve sleeved outside the probe, the protective sleeve is connected with the needle bed through a first spring, a power-on ring is installed at the lower end of the protective sleeve and is electrically connected with an external high-frequency switching power supply, a contact is fixedly connected to the surface of the cleaning box and is electrically connected with an electromagnetic spring, and when the power-on ring is contacted with the contact, the electromagnetic spring is communicated with a circuit of the external high-frequency switching power supply, so that the vibrating plate vibrates in the vertical direction, the brush ring brushes on the surface of the probe in a reciprocating mode, and the probe is cleaned.

Furthermore, through holes for the probe to pass through are formed in the side walls of the top and the bottom of the cleaning box, and the brush ring and the through holes are coaxially arranged.

Furthermore, a plurality of corrugated pipes are fixed on the inner bottom surface of the cleaning box, the upper ends of the corrugated pipes are connected to the bottom of the vibrating plate, a gas collecting cylinder is fixed at the bottom of the cleaning box, the output end of each corrugated pipe is communicated with the gas collecting cylinder through a gas guide pipe, a one-way valve is installed at the communication position of the gas guide pipe and the corrugated pipes, the output end of the gas collecting cylinder is communicated with a spray pipe, and a pressure valve is installed in the spray pipe.

Furthermore, one side of the two side plates, which is close to each other, is provided with a sliding groove, two ends of the cleaning box are respectively in sliding fit with the sliding grooves on two sides, a second spring is installed in the sliding groove, and the lower end of the second spring is connected to the upper surface of the cleaning box.

Further, two all rotate in the spout and be connected with the lead screw, be fixed with the gear on the lead screw, the bottom of cleaning box is fixed with the rack, gear and rack intermeshing.

Furthermore, it has two special-shaped nuts to examine sliding connection on the platform, two the special-shaped nut is located the both sides of conveyer belt respectively, lead screw and special-shaped nut screw-thread fit, be fixed with the setting element on the special-shaped nut.

Further, the conveying belt comprises an output shaft for providing power, a first belt pulley is fixed on the output shaft, a second belt pulley is fixed on one of the screw rods through a one-way bearing, and the first belt pulley is connected with the second belt pulley through a belt.

Further, install the pilot lamp on the support frame, the pilot lamp passes through circuit board and probe signal connection.

A testing method applied to a testing device of an intelligent ammeter comprises the following steps:

step S1, arranging PCBAs of intelligent electric meters to be tested on a conveyor belt at equal intervals one by one;

s2, controlling a hydraulic cylinder to drive a needle bed to move downwards, and in the process that the probe penetrates through the cleaning box, brushing the surface of the probe with a brush ring in a reciprocating manner to clean the probe;

s3, testing the contact between the probe and a PCBA surface contact of the intelligent ammeter to be detected, and judging a test result according to the indicator lamp;

and S4, controlling the hydraulic cylinder to drive the needle bed to move upwards and reset, conveying the conveying belt forwards to move a station, moving the PCBA of the intelligent electric meter to be tested out of the testing position, moving the PCBA of the intelligent electric meter to be tested to the testing position, and repeating the step S2 until the testing work is finished.

Compared with the prior art, the intelligent ammeter testing device and method have the advantages that:

1. according to the invention, by arranging the electromagnetic spring, the vibrating plate and the brush ring, the brush ring can brush on the surface of the probe in a reciprocating manner, so that the probe can be automatically cleaned, and the problem that the surface of the probe is shielded by impurities such as dust, oil stains and the like to cause incomplete contact with a test point, thereby influencing the stability of a test result is solved;

moreover, by arranging the corrugated pipe, the gas collecting cylinder and the gas guide pipe, the air flow can be driven to blow to the PCBA surface of the intelligent electric meter, dust attached to the surface of the intelligent electric meter is blown away, and the stability and accuracy of a test result are further guaranteed.

2. According to the invention, by arranging the gear, the rack, the lead screw, the special-shaped nut and the positioning piece, when the needle bed moves downwards to drive the cleaning box to press downwards, the cleaning box is used as a driving force, so that the two positioning pieces are close to each other, the two sides of the PCBA of the intelligent ammeter push and position the PCBA, so that the probe is ensured to be accurately contacted with a test point, the problem of inaccurate test caused by shaking and deviation of the PCBA of the intelligent ammeter due to factors such as equipment vibration or manual misoperation in the test process is avoided, and an additional power positioning device is not required to be arranged, so that the test and the positioning of the PCBA of the intelligent ammeter are cooperatively carried out and are tightly matched.

3. According to the invention, the conveying belt, the output shaft, the first belt pulley, the second belt pulley and the belt are arranged, and the rotation of the screw rod is used as the driving force, so that the conveying belt is intermittently conveyed forwards, an additional power driving device is not required to be arranged, the conveying of the PCBA of the intelligent electric meter can be realized, the continuous testing work is convenient, and each functional component is closely matched and linked, so that the improvement of the working efficiency is facilitated.

4. According to the invention, the protecting sleeve, the electricity connecting ring and the contact are arranged, the protecting sleeve can protect the tip of the probe, damage caused by mistaken touch of workers is prevented, when the protecting sleeve moves up and down along with a needle bed, the on-off of an electromagnetic spring circuit can be automatically controlled through the contact or the separation of the electricity connecting ring and the contact, manual control operation is not needed, and the degree of automation is high.

Drawings

Fig. 1 is a schematic structural diagram of a testing device for an intelligent electric meter provided by the invention;

FIG. 2 is a schematic side view of an initial state of the testing device for the smart meter according to the present invention;

FIG. 3 is a schematic side view of the testing device for the smart meter according to the present invention in an operating state;

FIG. 4 is an enlarged view at A in FIG. 2;

FIG. 5 is a schematic diagram of an internal structure of a cleaning box in the testing device for the smart meter according to the present invention;

FIG. 6 is an enlarged view at B in FIG. 5;

fig. 7 is a flowchart of a testing method of the testing device for the smart meter according to the present invention.

In the figure, 1 support frame, 2 probes, 3 side plates, 4 hydraulic cylinders, 5 needle beds, 6 cleaning boxes, 7 detection tables, 8 conveyor belts, 9 vibration plates, 10 electromagnetic springs, 11 brush rings, 12 protective sleeves, 13 first springs, 14 power-on rings, 15 contacts, 16 corrugated pipes, 17 gas collecting cylinders, 18 gas guide pipes, 19 spray pipes, 20 sliding grooves, 21 second springs, 22 lead screws, 23 gears, 24 racks, 25 special-shaped nuts, 26 positioning pieces, 27 output shafts, 28 one-way bearings, 29 first belt pulleys, 30 second belt pulleys, 31 belts and 32 indicating lamps.

Detailed Description

As shown in fig. 1-6, the testing device for the smart electric meter comprises a support frame 1 and a probe 2, wherein the support frame 1 comprises two side plates 3 which are arranged in parallel and a top plate fixedly connected to the side plates 3, a hydraulic cylinder 4 is installed on the support frame 1, a needle bed 5 is fixed at the output end of the hydraulic cylinder 4, the probe 2 is arranged at the bottom of the needle bed 5, a cleaning box 6 is arranged between the two side plates 3 in a sliding manner, a cleaning mechanism for cleaning the probe 2 is arranged in the cleaning box 6, a detection table 7 is installed between the two side plates 3, and a conveyor belt 8 is arranged in the middle of the detection table 7;

the cleaning mechanism comprises a vibrating plate 9 arranged in the cleaning box 6 in a sliding mode, the vibrating plate 9 is connected to the inner top surface of the cleaning box 6 through an electromagnetic spring 10, brush rings 11 matched with the probes 2 are embedded in the vibrating plate 9, soft bristles are embedded on the inner walls of the brush rings 11, and a power-on mechanism used for connecting a circuit of the electromagnetic spring 10 is arranged on the cleaning box 6;

the electrifying mechanism comprises a protecting sleeve 12 sleeved outside the probe 2, the protecting sleeve 12 is connected with a needle bed 5 through a first spring 13, an electrifying ring 14 is installed at the lower end of the protecting sleeve 12, the electrifying ring 14 is electrically connected with an external high-frequency switching power supply, a contact 15 is fixedly connected to the surface of the cleaning box 6, the contact 15 is electrically connected with an electromagnetic spring 10, when the electrifying ring 14 is in contact with the contact 15, the electromagnetic spring 10 is communicated with a circuit of the external high-frequency switching power supply, the high-frequency switching power supply comprises a power semiconductor switching device and is used for periodically and discontinuously outputting power, the prior art is adopted, after the electromagnetic spring 10 is communicated with the circuit of the high-frequency switching power supply, when the electromagnetic spring 10 is electrified, the direction of current in each coil is the same, so that attractive force is generated between each coil, the electromagnetic spring 10 is contracted, when power is off, the current in the coils disappears, the electromagnetic spring 10 bounces under the action of elasticity to reset, then the vibrating plate 9 vibrates in the vertical direction, the brush ring 11 is made to brush on the surface of the probe 2 to brush to realize cleaning of the probe 2, and avoid the surface of the probe 2 from being shielded by impurities, thereby avoiding the contact with the oil stains, and the stable test result.

It should be noted that the protecting sleeve 12 can protect the tip of the probe 2 to prevent the damage caused by the accidental touch of the worker, and when the protecting sleeve 12 moves up and down along with the needle bed 5, the on-off of the circuit of the electromagnetic spring 10 can be automatically controlled by the contact or the separation of the electric ring 14 and the contact 15, without the manual control operation, and the degree of automation is high.

The top and the bottom side walls of the cleaning box 6 are provided with through holes for the probe 2 to pass through, the brush ring 11 and the through holes are coaxially arranged, when the needle bed 5 drives the probe 2 to press down, the probe 2 enters the cleaning box 6 from the through hole at the upper end part, and after passing through the brush ring 11, the probe 2 passes through the through hole at the lower end part and penetrates out of the cleaning box 6.

The inner bottom surface of the cleaning box 6 is fixed with a plurality of corrugated pipes 16, the upper ends of the corrugated pipes 16 are connected to the bottom of the vibrating plate 9, the bottom of the cleaning box 6 is fixed with a gas collecting cylinder 17, the corrugated pipes 16 are provided with one-way air inlets, the output ends of the corrugated pipes 16 are communicated with the gas collecting cylinder 17 through air guide pipes 18, one-way valves are installed at the communication positions of the air guide pipes 18 and the corrugated pipes 16, only air in the corrugated pipes 16 is allowed to enter the gas collecting cylinder 17, air can be filled into the gas collecting cylinder 17 in the expansion and contraction process of the corrugated pipes 16, the output ends of the gas collecting cylinder 17 are communicated with spray pipes 19, pressure valves are installed in the spray pipes 19, when the pressure in the gas collecting cylinder 17 reaches the critical value of the pressure valves, air is sprayed out from the spray pipes 19, air flow is blown to the surface of the PCBA of the intelligent electric meter, dust attached to the surface of the intelligent electric meter is blown away, and the stability and accuracy of a test result are further guaranteed.

The side, close to each other, of each of the two side plates 3 is provided with a sliding groove 20, two ends of the cleaning box 6 are respectively in sliding fit in the sliding grooves 20 on the two sides, a second spring 21 is installed in each sliding groove 20, the lower end of each second spring 21 is connected to the upper surface of the cleaning box 6, it needs to be noted that the stiffness coefficient of each second spring 21 is larger than that of each first spring 13, the second springs 21 begin to be stretched after the first springs 13 are compressed until the first springs 13 are compressed to the limit state in the process that the hydraulic cylinder 4 drives the needle bed 5 to press down, and the contact electric rings 14 are in contact with the contacts 15, so that the cleaning box 6 does not move at the moment, and at the moment, the cleaning box 6 synchronously moves down along with the needle bed 5.

All be connected with lead screw 22 in two spouts 20 in the rotation, be fixed with gear 23 on the lead screw 22, the bottom of cleaning box 6 is fixed with rack 24, gear 23 and rack 24 intermeshing.

It has two special-shaped nuts 25 to examine sliding connection on platform 7, two special-shaped nuts 25 are located the both sides of conveyer belt 8 respectively, lead screw 22 and special-shaped nut 25 screw-thread fit, be fixed with setting element 26 on the special-shaped nut 25, when needle bed 5 moves down and drives clean box 6 and push down, use clean box 6 as drive power, make two setting element 26 be close to each other, push the location to it by smart electric meter PCBA's both sides, in order to guarantee probe 2 and test point accurate contact, and avoid in the test process, make smart electric meter PCBA rock the skew because of factors such as equipment vibrations or artificial maloperation, cause the inaccurate problem of test to take place, need not to set up extra power positioner, make the test and the location to smart electric meter PCBA go on in coordination, the cooperation is inseparable.

The conveyer belt 8 includes an output shaft 27 that is used for providing power, be fixed with first belt pulley 29 on the output shaft 27, one of them lead screw 22 goes up one-way bearing 28 and connects and be fixed with second belt pulley 30, connect through belt 31 between first belt pulley 29 and the second belt pulley 30, use lead screw 22's rotation as drive power, make conveyer belt 8 intermittent type nature carry forward, need not to set up extra power drive device, can realize the transport to smart electric meter PCBA, be convenient for carry out continuous test work, and, make each functional component closely cooperate the linkage, be favorable to work efficiency's improvement.

Install pilot lamp 32 on support frame 1, pilot lamp 32 passes through circuit board and 2 signal connection of probe, and during probe 2 and smart electric meter PCBA contact test, discovery smart electric meter PCBA's test data is unqualified back after the host computer is handled, through circuit board control pilot lamp 32 scintillation warning, the staff of being convenient for identification investigation, host computer and circuit board are prior art in this field, do not do here and describe repeatedly.

Referring to fig. 7, a testing method applied to a testing device of a smart meter includes the following steps:

s1, arranging PCBAs of intelligent electric meters to be tested on a conveyor belt 8 at equal intervals one by one;

s2, controlling the hydraulic cylinder 4 to drive the needle bed 5 to move downwards, and in the process that the probe 2 penetrates through the cleaning box 6, the brush ring 11 brushes on the surface of the probe 2 in a reciprocating manner to clean the probe 2;

s3, testing contact between the probe 2 and a PCBA surface contact of the intelligent ammeter to be detected, and judging a test result according to the indicator lamp 32;

and S4, controlling the hydraulic cylinder 4 to drive the needle bed 5 to move upwards and reset, conveying the conveyor belt 8 forwards and moving one station, moving the tested PCBA of the intelligent ammeter out of the testing position, moving the PCBA of the intelligent ammeter to be tested to the testing position, and repeating the step S2 until the testing work is completed.

The working principle of the invention is as follows:

the method comprises the following steps that PCBAs of the intelligent electric meters to be tested are arranged on a conveyor belt 8 one by one at equal intervals, a hydraulic cylinder 4 is controlled to drive a needle bed 5 to move downwards, a power connection ring 14 moves downwards to be in contact with a contact 15, so that an electromagnetic spring 10 is communicated with a circuit of an external high-frequency switching power supply, a vibration plate 9 vibrates in the vertical direction, a brush ring 11 brushes on the surface of a probe 2 in a reciprocating mode, the probe 2 is cleaned, and the problem that the surface of the probe 2 is shielded by impurities such as dust, oil stains and the like, so that the contact with a test point is not in place, and the stability of a test result is influenced is solved;

in the vibration process of the vibration plate 9, the corrugated pipe 16 is stretched and compressed in a reciprocating mode, air can be filled into the air collecting cylinder 17, the output end of the air collecting cylinder 17 is communicated with the spray pipe 19, when the air pressure in the air collecting cylinder 17 reaches the critical value of the pressure valve, the air is sprayed out of the spray pipe 19, the air flow blows to the PCBA surface of the intelligent electric meter, dust attached to the surface of the PCBA surface is blown away, and the stability and accuracy of a test result are further guaranteed.

After the first spring 13 is compressed to the limit state, the second spring 21 begins to be stretched, at the moment, the cleaning box 6 synchronously moves down along with the needle bed 5, the gear 23 is meshed with the rack 24, the lead screw 22 can be driven to rotate, the lead screw 22 is in threaded fit with the special-shaped nut 25, then the two positioning parts 26 can be driven to mutually approach, the two sides of the intelligent electric meter PCBA are pushed and positioned to ensure that the probe 2 is accurately contacted with the test point, the problem that the test is inaccurate due to the fact that the intelligent electric meter PCBA shakes and deviates due to factors such as equipment vibration or artificial misoperation in the test process is avoided, an additional power positioning device is not needed to be arranged, the test and the positioning of the intelligent electric meter PCBA are cooperatively carried out, and the fitting is tight.

In the process of pressing down the needle bed 5 for testing, the screw rod 22 rotates in the forward direction, the one-way bearing 28 can rotate freely in the direction, the second belt pulley 30 does not rotate, the conveyor belt 8 is in a static state, after the test is completed, the needle bed 5 moves upwards, the cleaning box 6 moves upwards under the elastic action of the second spring 21 for resetting, the gear 23 and the rack 24 drive the screw rod 22 to rotate in the reverse direction, in the direction, the one-way bearing 28 is locked to drive the second belt pulley 30 to rotate, the belt 31 can drive the first belt pulley 29 to rotate, then the conveyor belt 8 is conveyed forwards to move a station, the tested intelligent electric meter PCBA is moved out of the testing position, the next intelligent electric meter A to be tested is moved to the testing position, the conveyor belt 8 can convey the intelligent electric meter PCBA intermittently and forwards without arranging an additional power driving device, continuous testing work is facilitated, and all functional components are in close fit and linkage, so that the improvement of the working efficiency is facilitated.

Claims

1. The intelligent ammeter testing device comprises a support frame (1) and a probe (2), and is characterized in that the support frame (1) comprises two side plates (3) which are arranged in parallel and a top plate fixedly connected to the side plates (3), a hydraulic cylinder (4) is installed on the support frame (1), a needle bed (5) is fixed at the output end of the hydraulic cylinder (4), the probe (2) is arranged at the bottom of the needle bed (5), a cleaning box (6) is arranged between the two side plates (3) in a sliding manner, a cleaning mechanism for cleaning the probe (2) is arranged in the cleaning box (6), a detection table (7) is installed between the two side plates (3), and a conveying belt (8) is arranged in the middle of the detection table (7);

the cleaning mechanism comprises a vibrating plate (9) which is arranged in a cleaning box (6) in a sliding mode, the vibrating plate (9) is connected to the inner top surface of the cleaning box (6) through an electromagnetic spring (10), a brush ring (11) matched with the probe (2) is embedded in the vibrating plate (9), soft bristles are embedded in the inner wall of the brush ring (11), and a power-on mechanism used for connecting a circuit of the electromagnetic spring (10) is arranged on the cleaning box (6);

the electrifying mechanism comprises a protecting sleeve (12) sleeved outside the probe (2), the protecting sleeve (12) is connected with a needle bed (5) through a first spring (13), an electrifying ring (14) is installed at the lower end of the protecting sleeve (12), the electrifying ring (14) is electrically connected with an external high-frequency switching power supply, a contact (15) is fixedly connected to the surface of the cleaning box (6), the contact (15) is electrically connected with an electromagnetic spring (10), and when the electrifying ring (14) is in contact with the contact (15), the electromagnetic spring (10) is communicated with a circuit of the external high-frequency switching power supply, so that the vibrating plate (9) vibrates in the vertical direction, the brush ring (11) brushes on the surface of the probe (2) in a reciprocating mode, and the probe (2) is cleaned.

2. The intelligent electric meter testing device according to claim 1, wherein through holes for the probes (2) to pass through are formed in the side walls of the top and the bottom of the cleaning box (6), and the brush ring (11) and the through holes are coaxially arranged.

3. The testing device for the smart electric meter according to claim 1, wherein a plurality of corrugated pipes (16) are fixed on the inner bottom surface of the cleaning box (6), the upper ends of the corrugated pipes (16) are connected to the bottom of the vibrating plate (9), a gas collecting cylinder (17) is fixed on the bottom of the cleaning box (6), the output end of each corrugated pipe (16) is communicated with the corresponding gas collecting cylinder (17) through a gas guide pipe (18), a one-way valve is installed at the communication position of the gas guide pipe (18) and the corrugated pipe (16), the output end of each gas collecting cylinder (17) is communicated with a spray pipe (19), and a pressure valve is installed in each spray pipe (19).

4. The testing device for the intelligent electric meter according to claim 1, wherein a sliding groove (20) is formed in one side, close to each other, of the two side plates (3), two ends of the cleaning box (6) are in sliding fit with the sliding grooves (20) in the two sides respectively, a second spring (21) is installed in the sliding groove (20), and the lower end of the second spring (21) is connected to the upper surface of the cleaning box (6).

5. The testing device for the smart meters according to claim 4, wherein a lead screw (22) is rotatably connected in each of the two sliding grooves (20), a gear (23) is fixed on each lead screw (22), a rack (24) is fixed at the bottom of the cleaning box (6), and the gear (23) is meshed with the rack (24).

6. The intelligent electric meter testing device according to claim 5, wherein the detection table (7) is slidably connected with two special-shaped nuts (25), the two special-shaped nuts (25) are respectively located on two sides of the conveyor belt (8), the lead screw (22) is in threaded fit with the special-shaped nuts (25), and a positioning piece (26) is fixed on each special-shaped nut (25).

7. The testing device of the intelligent electric meter according to claim 5, wherein the conveyor belt (8) comprises an output shaft (27) for providing power, a first belt pulley (29) is fixed on the output shaft (27), a second belt pulley (30) is connected and fixed on a one-way bearing (28) on the lead screw (22), and the first belt pulley (29) and the second belt pulley (30) are connected through a belt (31).

8. The testing device for the intelligent electric meter according to claim 4, characterized in that an indicator light (32) is mounted on the supporting frame (1), and the indicator light (32) is in electrical signal connection with the probe (2) through a circuit board.

9. A test method applied to the intelligent electric meter test device of any one of claims 1-8 is characterized by comprising the following steps:

s1, arranging PCBAs of intelligent electric meters to be tested on a conveyor belt (8) at equal intervals one by one;

s2, controlling a hydraulic cylinder (4) to drive a needle bed (5) to move downwards, and in the process that the probe (2) penetrates through a cleaning box (6), a brush ring (11) brushes on the surface of the probe (2) in a reciprocating manner to clean the probe (2);

s3, testing the contact between the probe (2) and a PCBA surface contact of the intelligent electric meter to be detected, and judging a test result according to the indicator lamp (32);

and S4, controlling the hydraulic cylinder (4) to drive the needle bed (5) to move upwards for resetting, conveying the conveyor belt (8) forwards to move a station, moving the PCBA of the intelligent electric meter to be tested out of the testing position, moving the PCBA of the intelligent electric meter to be tested to the testing position, and repeating the step S2 until the testing work is completed.