CN112305397A - Automatic detection device for wireless meter - Google Patents
Automatic detection device for wireless meter Download PDFInfo
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- CN112305397A CN112305397A CN201910687140.3A CN201910687140A CN112305397A CN 112305397 A CN112305397 A CN 112305397A CN 201910687140 A CN201910687140 A CN 201910687140A CN 112305397 A CN112305397 A CN 112305397A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
- G01R31/2829—Testing of circuits in sensor or actuator systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2832—Specific tests of electronic circuits not provided for elsewhere
- G01R31/2836—Fault-finding or characterising
- G01R31/2837—Characterising or performance testing, e.g. of frequency response
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/15—Performance testing
- H04B17/17—Detection of non-compliance or faulty performance, e.g. response deviations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/29—Performance testing
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- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
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Abstract
The invention relates to an automatic detection device of a wireless meter, which comprises a detection table, an upright post and a detection table base, and is characterized in that: a plurality of turntable supporting devices and a cam divider are arranged on the detection table base; the upright post is provided with a Z-direction movement mechanism and a shielding box; the detection table is connected with a cam divider on the detection table base through a flange; the cam divider and the detection table base are fixed by screws; the detection table is circular, and N detection jigs are equidistantly distributed on the table surface.
Description
Technical Field
The invention relates to the field of automatic detection, in particular to an automatic detection device for detecting functions of a wireless meter.
Background
With the development of computer technology, modern communication technology and network technology, the communication modes are more and more, and in recent years, radio frequency communication technology represented by RF433MHZ/RF470MHZ (medium-short distance, low power consumption wireless communication technology) is gaining wide attention in meter reading industry. The wireless remote meter has the characteristics of low cost, low power consumption, high data transmission reliability, large network capacity, moderate wireless communication distance and the like, is well seen by meter reading production enterprises, and how to continuously go to the market for detecting whether the functions and parameters of a circuit board and a wireless communication module in the remote meter are qualified or not by adopting a wireless remote meter produced by a built-in wireless module. The invention of the wireless module detection station in chinese patent CN201310444913.8 can detect functions and parameters of wireless modules in batch and quickly, but most of the wireless communication modules are detected in an open environment, and wireless signals are likely to interfere with each other, which results in inaccurate measurement results and incapability of operating a plurality of such devices at the same time.
The automatic detection device of the wireless meter can be used for production and debugging of the meter plate of a spread spectrum wireless product, the device can test the functions of power consumption, dynamic valve, metering, wireless communication, transmitting power, frequency deviation receiving sensitivity and the like of the meter plate of the spread spectrum wireless product, the device is installed on a disc-shaped motion mechanism, meter clamping and meter falling efficiencies are improved, and wireless communication conflict is prevented through a small shielding device. The device can carry out large-scale and large-batch meter panel debugging on the wireless communication meter checking, reduces the number of debugging personnel and improves the production efficiency.
Disclosure of Invention
The invention provides an automatic detection device for a wireless meter, which can realize large-scale and large-batch meter panel debugging in an open environment and large-scale and large-batch meter panel debugging in a shielding room-free environment, reduce the number of debugging personnel and improve the production efficiency.
In order to achieve the above object, the technical solution of the present invention is as follows:
wireless table automatic checkout device contains and examines test table, stand, examines test table base, characterized by: a plurality of turntable supporting devices and a cam divider are arranged on the detection table base; the upright post is provided with a Z-direction movement mechanism and a shielding box; the detection table is connected with a cam divider on the detection table base through a flange; the cam divider and the detection table base are fixed by screws; the detection table is circular, and N detection jigs are distributed on the table top at equal intervals;
furthermore, the detection jig comprises 1 shielding base and 1 detection plate, and the shielding box base can be buckled with the shielding box;
furthermore, a tested meter placing area, a fault indicator lamp and an infrared communication circuit are arranged on the detection board;
furthermore, a detection circuit board is arranged in the detection board;
furthermore, a wireless module which is further shielded is arranged in the shielding box, and the wireless module comprises an infrared communication circuit and can carry out infrared communication with the infrared communication circuit on the detection board;
furthermore, an electric control system taking a PLC as a core is arranged on the base of the detection table and used for controlling the movement speed of the detection table surface and the lifting and descending of a shielding box arranged on the upright post;
furthermore, the detection board is provided with a power supply of the detected meter board, a sampling interface and a valve control interface, the detection process is automatically executed by connecting the detection board with the detected meter board, and the detection process and the detection result are displayed by 5 bicolor LED lamps; the cam divider drives the circular detection table to make intermittent rotary motion, rotates 1/12 circles each time, and the detection plate sequentially tests the power consumption, the valve actuation, the sampling, the clock and the wireless communication signal quality of the detected meter in the rotating process;
the detection process of the wireless meter automatic detection device is as follows:
power consumption detection: judging whether the static power consumption is normal or not by detecting the current;
s1: the output end of the microcontroller digital-to-analog converter outputs 0-2.5V analog voltage, the analog voltage is amplified by the operational amplifier and the triode to obtain 0-7.5V analog voltage output, a numerical control power supply circuit is formed, and the microcontroller is controlled by a program to output any voltage of 0-7.5V;
s2: three current detection circuits A, B, C are connected in series between the Q1 and the Q2 and the output terminal, each current detection circuit is a three-operational-amplifier direct-current amplification circuit, the amplification times are 12, the sampling resistors are 1k, 10.2 omega and 0.333 omega respectively, and the current detection ranges are 0-140uA, 0-14mA and 0-1A respectively;
s3: the output ends of the three amplifying circuits are connected with the ADC input end of the microcontroller, the output value of the amplifying circuit A, B, C is read in sequence through the microcontroller program, A is read firstly, B is read when A exceeds the range, and C is read when B exceeds the range, so that the current value of the detected surface plate can be read in a larger range;
and (3) valve actuation detection:
s1: the output lines M + and M-of the tested meter plate valve are connected with an I/O port of the microcontroller of the detection plate;
s2: the numerical control power supply circuit outputs low voltage of 4.2V, and when the microcontroller detects that the output line M-of the valve of the detected meter board is high and the output line M + is low, the valve is closed;
s3: the numerical control power supply circuit recovers normal voltage output, the electromagnet is controlled to be electrified to trigger the detected surface plate, and when the microcontroller detects that the output line M + of the valve of the detected surface plate is high and the output line M-is low, the valve is opened;
sampling and detecting:
s1: judging the sampling mode of the detected meter by magnetic triggering, wherein photoelectric sampling or pulse sampling is carried out;
s2: if the sample is photoelectric sampling, simulating a photoelectric direct-reading module through a microprocessor program of a detection board, performing magnetic triggering, receiving a meter reading instruction sent by a to-be-detected meter, and starting reading (0.4) to the to-be-detected meter;
s3: if the pulse sampling is carried out, directly outputting 4 double sampling pulses;
s4: reading the metering result: the method is carried out in a shielding environment, and the wireless module sends an instruction to the wireless module of the detected meter to copy the bottom number of the meter, and the bottom number is qualified if the bottom number is consistent with a sampling value sent by sampling;
wireless communication: clock, wireless communication signal quality detection:
s1: the cam divider drives the circular detection table-board to make intermittent rotary motion, the circular detection table-board rotates 1/12 circles each time, after each rotation, just one detection jig distributed on the circular detection table-board moves to the position right below the shielding box, the Z-direction movement mechanism drives the shielding box to move downwards, and the shielding box is buckled with the detection jig;
s2: after the shielding box is buckled, an infrared circuit on the detection board sends an infrared instruction to a wireless module in the shielding box to start detection;
s3: the wireless module in the shielding box and the wireless module on the checked meter perform 2-time communication of 'reading the bottom number of the meter' and 'reading the clock';
s4: the wireless module in the shielding box sends a detection result of 2 times of wireless communication to the infrared communication circuit on the detection board;
s5: the shielding box has the shielding capacity of 70dbm, the wireless module in the shielding box is provided with a shielding layer and has the shielding capacity of 70dbm, when wireless signal detection is carried out, the wireless module is set to-50 dbm to be communicated with the wireless module of the detected meter, the final transmitted signal intensity is smaller than-120 dbm and is close to the receiving sensitivity extreme value of the communication module of the detected meter, and if the wireless module in the shielding box is successfully communicated with the wireless module of the detected meter, the wireless communication of the detected meter is proved to be normal; the detected meter transmits a response signal, and after the wireless module in the shielding box receives the response signal, if the received signal strength is detected to exceed-40 dbm, the quality of the signal transmitted by the detected meter is proved to be normal;
the invention has the beneficial effects that:
(1) when the automatic detection device for the wireless meter detects wireless communication, due to the existence of the outer shielding box, signals transmitted by the wireless module with shielding cannot be received by other detected meters outside the shielding box, so that the detection precision of the wireless module is improved.
(2) The wireless meter automatic detection device can debug the large-scale and large-batch meter boards in an open environment and in a shielding room-free environment, reduces the number of debugging personnel and improves the production efficiency.
Drawings
FIG. 1 is a schematic structural diagram of an automatic detection device of a wireless meter according to the present invention.
FIG. 2 is a schematic view of a detection table of the automatic detection device of the wireless meter of the present invention.
FIG. 3 is a flow chart of the detection of the automatic detection device of the wireless meter of the present invention.
FIG. 4 is a flow chart of power consumption detection of the automatic detection device of the wireless meter of the present invention.
FIG. 5 is a flow chart of valve actuation detection for the automatic detection device of a wireless meter according to the present invention.
FIG. 6 is a flow chart of the sampling detection of the automatic detection device of the wireless meter of the present invention.
FIG. 7 is a flow chart of wireless communication detection of the automatic wireless meter detection apparatus of the present invention.
Detailed Description
The technical solution of the present invention will be described in further detail with reference to the accompanying drawings and detailed description.
As shown in figure 1: the automatic detection device for the wireless meter comprises a detection table, a stand column and a detection table base, wherein a plurality of turntable supporting devices (4) and a cam divider (3) are arranged on the detection table base (5); the upright post is provided with a Z-direction movement mechanism (1) and a shielding box (2); the detection table is connected with a cam divider on the detection table base through a flange; the cam divider and the detection table base are fixed by screws; the detection table is circular, and N detection jigs (6) are distributed on the table top at equal intervals;
furthermore, the detection jig comprises 1 shielding base and 1 detection plate, and the shielding box base can be buckled with the shielding box;
furthermore, a tested meter placing area, a fault indicator lamp and an infrared communication circuit are arranged on the detection board;
furthermore, a detection circuit board is arranged in the detection board;
furthermore, a wireless module with a shielding function is arranged in the shielding box, and the wireless module comprises an infrared communication circuit and can carry out infrared communication with the infrared communication circuit on the detection plate;
furthermore, an electric control system taking a PLC as a core is arranged on the base of the detection table and used for controlling the movement speed of the detection table surface and the lifting and descending of a shielding box arranged on the upright post;
furthermore, the detection board is provided with a power supply of the detected meter board, a sampling interface and a valve control interface, the detection process is automatically executed by connecting the detection board with the detected meter board, and the detection process and the detection result are displayed by 5 bicolor LED lamps;
the detection board has two states of not clamping the meter and clamping the meter, and the clamped state is divided into two normal fault conditions:
not clamping the watch: when the output end of the power supply of the detection board has no load, the detection board is in a non-clamped state, and the detection board intermittently outputs 6V voltage and detects the current of the output end of the power supply; the 5 double-color LED lamps are completely extinguished; if the load is detected, entering a clamped state; at the moment, the 5 double-color LED lamps are all yellow, and after entering a clamped state, 5-direction detection such as static power consumption, low electric valve, sampling, metering result reading, wireless performance testing and the like is automatically carried out; if a certain item is detected to be qualified, the corresponding indicator light turns green and continues to carry out the next item of detection, and if a certain item is detected to be unqualified, the corresponding indicator light turns red and the detection is stopped.
The detection process of the wireless meter automatic detection device is as follows:
power consumption detection: judging whether the static power consumption is normal or not by detecting the current;
s1: the output end of the digital-to-analog converter of the microprocessor outputs 0-2.5V analog voltage, the analog voltage is amplified by the operational amplifier and the triode to obtain 0-7.5V analog voltage output, a numerical control power circuit is formed, and any voltage of 0-7.5V can be output through the control of a microprocessor program;
s2: three current detection circuits A, B, C are connected in series between the Q1 and the Q2 and the output terminal, each current detection circuit is a three-operational-amplifier direct-current amplification circuit, the amplification times are 12, the sampling resistors are 1k, 10.2 omega and 0.333 omega respectively, and the current detection ranges are 0-140uA, 0-14mA and 0-1A respectively;
s3: the output ends of the three amplifying circuits are connected with the ADC input end of the microprocessor, the output value of the amplifying circuit A, B, C is read in sequence through the microprocessor program, A is read firstly, B is read when A exceeds the range, C is read when B exceeds the range, and therefore the current value of the detected surface plate can be read in a larger range; the sampling resistor of the amplifying circuit A, B is connected in parallel with a diode, because the effective voltage range of the sampling resistor does not exceed 0.7V, the parallel diode does not influence the normal work of the sampling resistor, when the current exceeds the measuring range, the larger current can flow through the diode, and the large current output capability is not influenced.
The voltage sampling end of the numerical control power supply circuit is arranged behind the current detection circuit, so that the internal resistance voltage division of the current detection circuit cannot influence the output accuracy of the numerical control power supply circuit.
And (3) valve actuation detection:
s1: the output lines M + and M-of the valve of the detected meter plate are connected with an I/O port of the microprocessor of the detection plate;
s2: the numerical control power supply circuit outputs low voltage of 4.2V, and when the microprocessor detects that the output line M-of the valve of the detected meter board is high and the output line M + is low, the valve is closed;
s3: the numerical control power supply circuit recovers normal voltage output, the electromagnet is controlled to be electrified to trigger the detected surface plate, and when the microprocessor detects that the output line M + of the valve of the detected surface plate is high and the output line M-is low, the valve is opened;
sampling and detecting:
s1: judging the sampling mode of the detected meter by magnetic triggering, wherein photoelectric sampling or pulse sampling is carried out;
s2: if the sample is photoelectric sampling, simulating a photoelectric direct-reading module through a microprocessor program of a detection board, performing magnetic triggering, receiving a meter reading instruction sent by a to-be-detected meter, and starting reading (0.4) to the to-be-detected meter;
s3: if the pulse sampling is carried out, directly outputting 4 double sampling pulses;
s4: reading the metering result: the method is carried out in a shielding environment, and the wireless module sends an instruction to the wireless module of the detected meter to copy the bottom number of the meter, and the bottom number is qualified if the bottom number is consistent with a sampling value sent by sampling;
wireless communication: clock, wireless communication signal quality detection:
s1: the cam divider drives the circular detection table-board to make intermittent rotary motion, the circular detection table-board rotates 1/12 circles each time, after each rotation, just one detection jig distributed on the circular detection table-board moves to the position right below the shielding box, the Z-direction movement mechanism drives the shielding box to move downwards, and the shielding box is buckled with the detection jig;
s2: after the shielding box is buckled, an infrared circuit on the detection board sends an infrared instruction to a wireless module in the shielding box to start detection;
s3: the wireless module in the shielding box and the wireless module on the checked meter perform 2-time communication of 'reading the bottom number of the meter' and 'reading the clock';
s4: the wireless module in the shielding box sends a detection result of 2 times of wireless communication to the infrared communication circuit on the detection board;
s5: the shielding box has the shielding capacity of 70dbm, the wireless module in the shielding box is provided with a shielding layer and has the shielding capacity of 70dbm, when wireless signal detection is carried out, the wireless module is set to-50 dbm to be communicated with the wireless module of the detected meter, the final transmitted signal intensity is smaller than-120 dbm and is close to the receiving sensitivity extreme value of the communication module of the detected meter, and if the wireless module in the shielding box is successfully communicated with the wireless module of the detected meter, the wireless communication of the detected meter is proved to be normal; the detected meter transmits a response signal, and after the wireless module in the shielding box receives the response signal, if the received signal strength is detected to exceed-40 dbm, the quality of the signal transmitted by the detected meter is proved to be normal;
the detection device detects the power consumption, the valve actuation, the sampling, the clock and the wireless communication signal quality of the detected meter in sequence, then the meter is arranged on the upper table and the lower table at another fixed station, and whether the power consumption, the valve actuation, the sampling, the clock and the wireless communication signal quality are qualified or not and the fault type are judged according to the LED.
Claims (8)
1. Wireless table automatic checkout device contains and examines test table, stand, examines test table base, characterized by: a plurality of turntable supporting devices and a cam divider are arranged on the detection table base; the upright post is provided with a Z-direction movement mechanism and a shielding box; the detection table is connected with a cam divider on the detection table base through a flange; the cam divider and the detection table base are fixed by screws; the detection table is circular, and N detection jigs are distributed on the table top at equal intervals.
2. The wireless watch automatic detection device according to claim 1, characterized in that: the detection jig comprises 1 shielding base and 1 detection plate, and the shielding box base can be buckled with the shielding box.
3. The wireless watch automatic detection device according to claim 1, characterized in that: the detection board is provided with a to-be-detected meter placing area, a fault indicator lamp and an infrared communication circuit.
4. The wireless watch automatic detection device according to claim 1, characterized in that: and a detection circuit board is arranged in the detection board.
5. The wireless watch automatic detection device according to claim 1, characterized in that: the shielding box is internally provided with a wireless module which is further shielded, and the wireless module comprises an infrared communication circuit and can carry out infrared communication with the infrared communication circuit on the detection plate.
6. The wireless watch automatic detection device according to claim 1, characterized in that: and an electric control system taking PLC as a core is arranged on the base of the detection table and used for controlling the movement speed of the detection table surface and the lifting and descending of the shielding box arranged on the upright post.
7. The wireless watch automatic detection device according to claim 1, characterized in that: the detection plate is provided with a power supply of the detected meter plate, a sampling interface and a valve control interface, the detection process is automatically executed by being connected with the detected meter plate, the detection process and the detection result are displayed by 5 double-color LED lamps, the circular detection table surface is driven by the cam divider to do intermittent rotary motion, the circular detection table surface rotates 1/12 circles each time, and the detection plate sequentially tests the power consumption, the valve actuation, the sampling, the clock and the wireless communication signal quality of the detected meter in the rotating process.
8. The wireless watch automatic detection device according to claim 1, characterized in that: the detection process of the wireless meter automatic detection device is as follows:
power consumption detection: judging whether the static power consumption is normal or not by detecting the current;
s1: the output end of the microcontroller digital-to-analog converter outputs 0-2.5V analog voltage, the analog voltage is amplified by the operational amplifier and the triode to obtain 0-7.5V analog voltage output, a numerical control power supply circuit is formed, and the microcontroller is controlled by a program to output any voltage of 0-7.5V;
s2: three current detection circuits A, B, C are connected in series between the triode Q1 and the triode Q2 and the output terminal, each current detection circuit is a three-operational-amplifier direct-current amplification circuit, the amplification times are 12, the sampling resistances are 1k, 10.2 omega and 0.333 omega respectively, and the current detection ranges are 0-140uA, 0-14mA and 0-1A respectively;
s3: the output ends of the three amplifying circuits are connected with the ADC input end of the microcontroller, the output value of the amplifying circuit A, B, C is read in sequence through the microcontroller program, A is read firstly, B is read when A exceeds the range, and C is read when B exceeds the range, so that the current value of the detected surface plate can be read in a larger range;
and (3) valve actuation detection:
s1: the output lines M + and M-of the valve of the detected surface plate are connected with an I/O port of the MCU of the detection plate;
s2: the numerical control power supply circuit outputs low voltage of 4.2V, and when the MCU detects that the output line M-of the valve of the detected meter board is high and the output line M + is low, the valve is closed;
s3: the numerical control power supply circuit recovers normal voltage output, the electromagnet is controlled to be electrified to trigger the detected surface plate, and when the MCU detects that the output line M + of the valve of the detected surface plate is high and the output line M-is low, the valve is opened;
sampling and detecting:
s1: judging the sampling mode of the detected meter by magnetic triggering, wherein photoelectric sampling or pulse sampling is carried out;
s2: if the sample is photoelectric sampling, simulating a photoelectric direct-reading module through a microprocessor program of a detection board, performing magnetic triggering, receiving a meter reading instruction sent by a to-be-detected meter, and starting reading (0.4) to the to-be-detected meter;
s3: if the pulse sampling is carried out, directly outputting 4 double sampling pulses;
s4: reading the metering result: the method is carried out in a shielding environment, and the wireless module sends an instruction to the wireless module of the detected meter to copy the bottom number of the meter, and the bottom number is qualified if the bottom number is consistent with a sampling value sent by sampling;
wireless communication: clock, wireless communication signal quality detection:
s1: the cam divider drives the circular detection table-board to make intermittent rotary motion, the circular detection table-board rotates 1/12 circles each time, after each rotation, just one detection jig distributed on the circular detection table-board moves to the position right below the shielding box, the Z-direction movement mechanism drives the shielding box to move downwards, and the shielding box is buckled with the detection jig;
s2: after the shielding box is buckled, an infrared circuit on the detection board sends an infrared instruction to a wireless module in the shielding box to start detection;
s3: the wireless module in the shielding box and the wireless module on the checked meter perform 2-time communication of 'reading the bottom number of the meter' and 'reading the clock';
s4: the wireless module in the shielding box sends a detection result of 2 times of wireless communication to the infrared communication circuit on the detection board;
s5: the shielding box has the shielding capacity of 70dbm, the wireless module in the shielding box is provided with a shielding layer and has the shielding capacity of 70dbm, when wireless signal detection is carried out, the wireless module is set to-50 dbm to be communicated with the wireless module of the detected meter, the final transmitted signal intensity is smaller than-120 dbm and is close to the receiving sensitivity extreme value of the communication module of the detected meter, and if the wireless module in the shielding box is successfully communicated with the wireless module of the detected meter, the wireless communication of the detected meter is proved to be normal; the detected meter transmits a response signal, and after the wireless module in the shielding box receives the response signal, if the received signal strength is detected to exceed-40 dbm, the quality of the signal transmitted by the detected meter is proved to be normal.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116184172A (en) * | 2023-02-27 | 2023-05-30 | 深圳市启联星智能科技有限公司 | Radio frequency test method of circuit board, radio frequency test equipment, computer system and computer readable storage medium thereof |
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