CN204856129U - Multichannel industry data acquisition module suitable for earth -leakage protector - Google Patents
Multichannel industry data acquisition module suitable for earth -leakage protector Download PDFInfo
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- CN204856129U CN204856129U CN201520591465.9U CN201520591465U CN204856129U CN 204856129 U CN204856129 U CN 204856129U CN 201520591465 U CN201520591465 U CN 201520591465U CN 204856129 U CN204856129 U CN 204856129U
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Abstract
The utility model discloses a multichannel industry data acquisition module suitable for earth -leakage protector, include: voltage conversion circuit, power isolation circuit, many channel signal modulate circuit, multichannel analog to digital conversion circuit and ARM controller, many channel signal modulate circuit is connected to voltage conversion circuit's output, multichannel analog to digital conversion circuit is connected to the output of multichannel modulate circuit, data transmission buffer circuit is connected to multichannel analog to digital conversion circuit's output, the ARM controller is connected to data transmission buffer circuit's output, voltage conversion circuit, multichannel analog to digital conversion circuit and ARM controller are connected to the output of power isolation circuit. The utility model discloses a power isolation circuit is supplied power for circuit module to to the voltage electric current on the power supply line and the leakage current is monitored and cut off the power supply and carry out the protection when the relevant parameter value exceedes the setting.
Description
Technical field
The utility model relates to residual current protection apparatus, is specifically related to a kind of multi-channel industrial data acquisition module being applicable to earth leakage protective device, realizes the high-precision data acquisition to three-phase voltage, three-phase current and leakage current real time data in supply line.
Background technology
Leakage current protector is a kind of protective device of electric power netting safe running; be mainly used in the end protection of electrical network (below three-phase four-wire system 400V supply line); earth fault, electrical equipment for detecting supply line leak electricity, the person gets an electric shock, and the leakage current caused increases; cut off mains supply, the equipment of protection supply line and personal safety protection.
Earth leakage protective device is that three-phase voltage, three-phase current and the leakage current to electrical network carries out real-time monitoring, therefore needs the high-precision measurement of real-time.Meanwhile, need to carry out corresponding power supply and data isolation process when power supply and signals collecting on the impact of device internal circuit to reduce grounding interference noise and common mode voltage in electrical network.
Utility model content
The utility model is dumb for current existing reactive power compensator compensation way, the situation that control object is single, proposes a kind of multi-channel industrial data acquisition module being applicable to earth leakage protective device.
The technical solution adopted in the utility model is: a kind of multi-channel industrial data acquisition module being applicable to earth leakage protective device, it is characterized in that, comprise: voltage conversion circuit, power isolation circuit, multi channel signals modulate circuit, hyperchannel analog to digital conversion circuit and ARM controller, the output terminal connecting multi-channel signal conditioning circuit of described voltage conversion circuit, the output terminal connecting multi-channel analog to digital conversion circuit of described hyperchannel modulate circuit, the output terminal connection data transmission buffer circuit of described hyperchannel analog to digital conversion circuit, the output terminal of described data transmission buffer circuit connects ARM controller, the output terminal of described power isolation circuit connects voltage conversion circuit, hyperchannel analog to digital conversion circuit and ARM controller.
Further, described voltage conversion circuit comprises: by stabilivolt TV55, the protection circuit that protective tube P55 and single-phase diode D5 forms, the mu balanced circuit be made up of LC filtering circuit and 7805 stabilivolts, and the output circuit to be made up of electric capacity C44 and voltage pio chip, the cathode output end series connection protective tube P55 of power isolation circuit, described stabilivolt TV55 is connected in parallel on the output terminal of protective tube P55 and the cathode output end of power isolation circuit, the positive pole of described single-phase diode D5 connects the output terminal of described 7805 stabilivolts, the negative pole of described single-phase diode connects LC filtering circuit, the output terminal of described LC filtering circuit connects 7805 stabilivolts, the output terminal of the stabilivolt of described 7805 stabilivolts connects voltage pio chip and passes through electric capacity C44 ground connection.
Further, described power isolation circuit adopts chip ADuM3471 the 5V voltage that prime voltage conversion circuit exports to be carried out isolation and amplifier, for other modules are powered.
Further, described multi channel signals modulate circuit uses the see-saw circuit with signal amplification and level conversion function, converts the signal into the signal within the scope of applicable analog to digital converter, is convenient to the accurate acquisition of signal.
Further, described multi channel signals modulate circuit adopts chip LMV324.
Further, described hyperchannel analog to digital conversion circuit adopt 16,8 passages, 250kSPS SAR modulus conversion chip AD7689.
The beneficial effects of the utility model are: the utility model is that circuit module is powered by power isolation circuit, can be used for the three-phase voltage of leakage current protector equipment, three-phase current and leakage data collection, to cut off power supply when monitoring the electric current and voltage in supply line and leakage current and exceed setting in related parameter values carrying out protection; Power supply and signal carry out isolated conversion and transmission, can reduce circuit noise and common mode voltage to the impact of whole circuit; A kind of multi-channel industrial data acquisition module being applicable to earth leakage protective device that the utility model provides; for leakage current protector under the industrial electrical environments of complexity; the size of three-phase voltage three-phase current and leakage current can be measured accurately and effectively; so that for relevant equipment and personnel protect; power supply and signal carry out isolated conversion and transmission, can reduce circuit noise and common mode voltage to the impact of whole circuit.
Accompanying drawing explanation
Fig. 1 is a kind of multi-channel industrial data acquisition module block structural diagram being applicable to earth leakage protective device that the utility model proposes;
Fig. 2 is the described voltage conversion circuit structural drawing that the utility model proposes;
Fig. 3 is the described power isolation module circuit structure diagram that the utility model proposes;
Fig. 4 is the described multi channel signals modulate circuit structural drawing that the utility model proposes;
Fig. 5 is the described hyperchannel analog to digital conversion buffer circuit structural drawing that the utility model proposes.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further detailed.
See Fig. 1, it is a kind of multi-channel industrial data acquisition module block structural diagram being applicable to earth leakage protective device that the utility model proposes.
As shown in Figure 1, a kind of multi-channel industrial data acquisition module being applicable to earth leakage protective device, it is characterized in that, comprise: voltage conversion circuit, power isolation circuit, multi channel signals modulate circuit, hyperchannel analog to digital conversion circuit and ARM controller, the output terminal connecting multi-channel signal conditioning circuit of described voltage conversion circuit, the output terminal connecting multi-channel analog to digital conversion circuit of described hyperchannel modulate circuit, the output terminal connection data transmission buffer circuit of described hyperchannel analog to digital conversion circuit, the output terminal of described data transmission buffer circuit connects ARM controller, the output terminal of described power isolation circuit connects voltage conversion circuit, hyperchannel analog to digital conversion circuit and ARM controller.
In the utility model embodiment; be that circuit module is powered by power isolation circuit; can be used for the three-phase voltage of leakage current protector equipment, three-phase current and leakage data collection, to cut off power supply when monitoring the electric current and voltage in supply line and leakage current and exceed setting in related parameter values carrying out protection.
In the utility model embodiment, power supply and signal carry out isolated conversion and transmission, can reduce circuit noise and common mode voltage to the impact of whole circuit.
See Fig. 2, it is the described voltage conversion circuit structural drawing that the utility model proposes;
As shown in Figure 2, described voltage conversion circuit comprises: by stabilivolt TV55, the protection circuit that protective tube P55 and single-phase diode D5 forms, the mu balanced circuit be made up of LC filtering circuit and 7805 stabilivolts, and the output circuit to be made up of electric capacity C44 and voltage pio chip, the cathode output end series connection protective tube P55 of power isolation circuit, described stabilivolt TV55 is connected in parallel on the output terminal of protective tube P55 and the cathode output end of power isolation circuit, the positive pole of described single-phase diode D5 connects the output terminal of described 7805 stabilivolts, the negative pole of described single-phase diode connects LC filtering circuit, the output terminal of described LC filtering circuit connects 7805 stabilivolts, the output terminal of the stabilivolt of described 7805 stabilivolts connects voltage pio chip and passes through electric capacity C44 ground connection.
In the utility model embodiment, convert the DC voltage of outside wide region to stable 5V voltage by protection circuit, mu balanced circuit and export.
See Fig. 3, it is the described power isolation module circuit structure diagram that the utility model proposes;
As shown in Figure 3, described power isolation circuit adopts chip ADuM3471 the 5V voltage that prime voltage conversion circuit exports to be carried out isolation and amplifier, for other modules are powered.
In the utility model embodiment, chip ADuM3471 provides the isolation solution of power supply and Digital I/O, its by the 5V voltage transitions of prime be isolation 5V voltage give whole module for power supply, improve the power supply antijamming capability of module.
See Fig. 4, it is the described multi channel signals modulate circuit structural drawing that the utility model proposes;
As shown in Figure 4, described multi channel signals modulate circuit uses the see-saw circuit with signal amplification and level conversion function, converts the signal into the signal within the scope of applicable analog to digital converter, is convenient to the accurate acquisition of signal.
Further, described multi channel signals modulate circuit adopts chip LMV324.
See Fig. 5, it is the described hyperchannel analog to digital conversion buffer circuit structural drawing that the utility model proposes.
As shown in Figure 5, described hyperchannel analog to digital conversion circuit adopt 16,8 passages, 250kSPS SAR modulus conversion chip AD7689.
In the utility model embodiment, hyperchannel analog to digital conversion circuit adopt 16,8 passages, 250kSPS SAR modulus conversion chip AD7689, coordinate peripheral circuit, can gather three-phase voltage three-phase current and leakage current numerical value.
A kind of multi-channel industrial data acquisition module being applicable to earth leakage protective device that the utility model provides; for leakage current protector under the industrial electrical environments of complexity; the size of three-phase voltage three-phase current and leakage current can be measured accurately and effectively; so that for relevant equipment and personnel protect; power supply and signal carry out isolated conversion and transmission, can reduce circuit noise and common mode voltage to the impact of whole circuit.
By reference to the accompanying drawings the utility model preferred implementation is explained in detail above, but the utility model is not limited to above-mentioned embodiment, in the ken that those of ordinary skill in the art possess, can also make a variety of changes under the prerequisite not departing from the utility model aim.Do not depart from design of the present utility model and scope can make many other and change and remodeling.Should be appreciated that the utility model is not limited to specific embodiment, scope of the present utility model is defined by the following claims.
Claims (6)
1. one kind is applicable to the multi-channel industrial data acquisition module of earth leakage protective device, it is characterized in that, comprise: voltage conversion circuit, power isolation circuit, multi channel signals modulate circuit, hyperchannel analog to digital conversion circuit and ARM controller, the output terminal connecting multi-channel signal conditioning circuit of described voltage conversion circuit, the output terminal connecting multi-channel analog to digital conversion circuit of described hyperchannel modulate circuit, the output terminal connection data transmission buffer circuit of described hyperchannel analog to digital conversion circuit, the output terminal of described data transmission buffer circuit connects ARM controller, the output terminal of described power isolation circuit connects voltage conversion circuit, hyperchannel analog to digital conversion circuit and ARM controller.
2. a kind of multi-channel industrial data acquisition module being applicable to earth leakage protective device according to claim 1, it is characterized in that, described voltage conversion circuit comprises: by stabilivolt TV55, the protection circuit that protective tube P55 and single-phase diode D5 forms, the mu balanced circuit be made up of LC filtering circuit and 7805 stabilivolts, and the output circuit to be made up of electric capacity C44 and voltage pio chip, the cathode output end series connection protective tube P55 of power isolation circuit, described stabilivolt TV55 is connected in parallel on the output terminal of protective tube P55 and the cathode output end of power isolation circuit, the positive pole of described single-phase diode D5 connects the output terminal of described 7805 stabilivolts, the negative pole of described single-phase diode connects LC filtering circuit, the output terminal of described LC filtering circuit connects 7805 stabilivolts, the output terminal of the stabilivolt of described 7805 stabilivolts connects voltage pio chip and passes through electric capacity C44 ground connection.
3. a kind of multi-channel industrial data acquisition module being applicable to earth leakage protective device according to claim 1; it is characterized in that; described power isolation circuit adopts chip ADuM3471 the 5V voltage that prime voltage conversion circuit exports to be carried out isolation and amplifier, for other modules are powered.
4. a kind of multi-channel industrial data acquisition module being applicable to earth leakage protective device according to claim 1; it is characterized in that; described multi channel signals modulate circuit uses the see-saw circuit with signal amplification and level conversion function; convert the signal into the signal within the scope of applicable analog to digital converter, be convenient to the accurate acquisition of signal.
5. a kind of multi-channel industrial data acquisition module being applicable to earth leakage protective device according to claim 4, is characterized in that, described multi channel signals modulate circuit adopts chip LMV324.
6. a kind of multi-channel industrial data acquisition module being applicable to earth leakage protective device according to claim 1, is characterized in that, described hyperchannel analog to digital conversion circuit adopt 16,8 passages, 250kSPS SAR modulus conversion chip AD7689.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520591465.9U CN204856129U (en) | 2015-08-10 | 2015-08-10 | Multichannel industry data acquisition module suitable for earth -leakage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520591465.9U CN204856129U (en) | 2015-08-10 | 2015-08-10 | Multichannel industry data acquisition module suitable for earth -leakage protector |
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| Publication Number | Publication Date |
|---|---|
| CN204856129U true CN204856129U (en) | 2015-12-09 |
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| CN201520591465.9U Active CN204856129U (en) | 2015-08-10 | 2015-08-10 | Multichannel industry data acquisition module suitable for earth -leakage protector |
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| CN (1) | CN204856129U (en) |
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- 2015-08-10 CN CN201520591465.9U patent/CN204856129U/en active Active
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 230088 science and technology zone, Hefei, Anhui, No. 90 Patentee after: ANHUI NARI JIYUAN POWER GRID TECHNOLOGY CO., LTD. Address before: 230088 science and technology zone, Hefei, Anhui, No. 90 Patentee before: Anhui Jiyuan Power System Technology Co., Ltd. |