Electric energy meter RS485 interface detection apparatus
The utility model relates to the pick-up unit in electric system, specifically, is a kind of portable general RS485 communication check device for detection of electric energy meter 485 communication loop duties.
In electric system, RS485 communication interface is the heavy communication interface of of electric energy meter, can connect carrier communication module, GPRS communication module by this interface, realizes remote meter reading, therefore extremely important to the routine testing of electric energy meter 485 communication interfaces.Current detection mode typically uses some special inspecting equipments, and these checkout equipment volumes are large and heavy, carry inconvenience; The unit type of different manufacturers is different, complicated operation; Internal communication protocol using is different, and versatility is poor.Above-mentioned defect makes testing very complicated, inefficiency.In order fundamentally to address the above problem, how making checkout equipment can be general, portable, efficiently those skilled in the art's technical task to be solved.
Utility model content
Carry inconvenience, complex operation, the poor deficiency of versatility for what exist in prior art, the utility model is realized Site Detection for electric energy meter a kind of small and exquisite portable, simple to operate, electric energy meter RS485 interface detection apparatus that versatility is good is provided, and can effectively increase work efficiency.
For realizing above-mentioned technical purpose, the technical solution adopted in the utility model is as follows:
A kind of electric energy meter RS485 interface detection apparatus, comprising:
Be positioned at the communication unit of described pick-up unit front portion, for 485 communication interfaces are provided, set up physical connection with 485 communication interfaces of electric energy meter.
The control module that is positioned at described pick-up unit middle part, carries out all logical operation and the computing of pick-up unit; Liquid crystal display, it is for showing the working condition of described communication unit; Input block, realizes man-machine interaction and described control module is operated.
The power supply unit that is positioned at described pick-up unit afterbody, it provides power supply to pick-up unit; Charging inlet, provides 5V voltage input interface, is described power supply unit charging.
Described communication unit front end is provided with the concealed contact pin of physical connection electric energy meter 485 communication interfaces, and communication unit is provided with sheath outward, and described pick-up unit afterbody is provided with L-type snap close, this latch openings direction detecting direction front portion.
Adopt the utility model of technique scheme; described communication unit can be set up physical connection by 485 communication interfaces of contact pin and electric energy meter, and while use, contact pin is accepted; sheath is enclosed within outward outside communication unit; be not subject to the pollution such as dust, rainwater for the protection of 485 communication interfaces, protect contact pin to avoid stabbing, when use simultaneously; take off sheath; be connected with 485 communication interfaces of electric energy meter by contact pin, and L-type snap close can be clipped on notebook or pocket, easy to carry.
Further limit, described communication unit outside is also provided with corresponding contact pin and can connects the screw of wire.When contact pin can not use cannot set up physical connection time, can connect wire by screw, set up 485 communication interfaces of pick-up unit and the physical connection of electric energy meter 485 communication interfaces.
Further limit, described power supply unit is by a lithium battery power supply, and is provided with electric weight and detects protected location.When lithium battery electric discharge: when electric weight is not enough, electric weight detects protected location and points out low charge alert; In the time that electric weight is too low, electric weight detects the automatic powered-down of protected location; When lithium cell charging, if battery is full of, electric weight detects protected location and automatically disconnects charging circuit.
Compared to existing technology, carrying portable, simple to operate, has good versatility to the utility model, can greatly improve operator and detect the work efficiency of electric energy meter.
Brief description of the drawings
Fig. 1 is object construction schematic diagram of the present utility model.
In order to make those skilled in the art understand better the utility model, below in conjunction with drawings and Examples, technical solutions of the utility model are further illustrated.
As shown in Figure 1, a kind of electric energy meter RS485 interface detection apparatus, comprises communication unit 1, control module 2, liquid crystal display 3, input block 4, power supply unit 5 and charging inlet 6.
Described communication unit 1 is positioned at pick-up unit front portion; be used for providing 485 communication interfaces; this communication unit 1 front end is provided with the concealed or movable contact pin 9 of physical connection electric energy meter 485 communication interfaces; the not used time; these contact pin 9 storages can be got up and overlapped upper jacket 8; can protect 485 communication interfaces not to be subject to the pollution such as dust, rainwater by sheath 8, protect contact pin 9 to avoid stabbing simultaneously.In order to improve the versatility of pick-up unit, described communication unit 1 outside is also provided with the screw for subsequent use 10 of corresponding contact pin 9, in the time that contact pin 9 cannot be set up physical connection with electric energy meter 485 communication interfaces, can connect wire by screw 10, set up the physical connection between pick-up unit and electric energy meter.
Described control module 2, liquid crystal display 3 and input block 4 are positioned at pick-up unit middle part.Wherein control module 2 adopts the PIC single-chip microcomputer of Microchip company, carries out all logical operation and the computing of pick-up unit.Liquid crystal display 3 interfaces adopt OLED display screens, show that whether pick-up unit communication is normal, if communication normally shows the parameters such as communication protocol version number, current electric quantity, voltage and the electric current of electric energy meter; If communication abnormality is alarm prompt.Input block 4 comprises some input keys, can realize man-machine interaction and described control module 2 is operated.
Described power supply unit 5 and charging inlet 6 are positioned at pick-up unit afterbody.Wherein power supply unit 5 is by a lithium battery power supply, and provides electric quantity of lithium battery to detect protected location, when lithium battery electric discharge: when electric weight is not enough, point out low charge alert, in the time that electric weight is too low, powered-down automatically; When lithium cell charging, if battery is full of, automatically disconnect charging circuit.Charging inlet 6, for power supply unit 5 provides 5V voltage input interface, is lithium cell charging, includes the circuit of overvoltage, under-voltage protection in this charging inlet 6.
On pick-up unit tail end outer wall, be provided with L-type snap close 7, these snap close 7 opening direction detecting direction front portions, can be clipped in pick-up unit on notebook or pocket easily by this snap close 7.
The using method of pick-up unit under brief description: when use, take off sheath 8, first communication unit 1 is connected with 485 communication interfaces of electric energy meter, then control and open device power supply (DPS) by input block 4, if low capacity prompt appears in liquid crystal display 3, need by charging inlet 6, power supply unit 5 to be charged; Otherwise according to the prompting of liquid crystal display 3, and can operate input block 4, communicate by letter with electric energy meter by communication unit 1, if communicate by letter successfully, can from liquid crystal display 3, see the parameters such as version number, voltage and the electric current of electric energy meter; Otherwise there is the prompting of communication abnormality in liquid crystal display 3.After finishing using, should again overlap upper jacket 8.When power supply unit 5 electric weight are when not enough, liquid crystal display 3 can show low capacity prompts, if power supply unit 5 electric weight when too low, control module 2 will directly be cut off the electricity supply, and quits work.While using charging inlet 6 to charge to power supply unit 5, if the electric weight of power supply unit 5 is full of, charging inlet 6 can disconnect charge circuit, stops charging.
The electric energy meter RS485 interface detection apparatus above the utility model being provided is described in detail.The explanation of specific embodiment is just for helping to understand method of the present utility model and core concept thereof.Should be understood that; for those skilled in the art; do not departing under the prerequisite of the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.