CN204479646U - A kind of equipment control electronic tag current detection circuit - Google Patents
A kind of equipment control electronic tag current detection circuit Download PDFInfo
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- CN204479646U CN204479646U CN201420581505.7U CN201420581505U CN204479646U CN 204479646 U CN204479646 U CN 204479646U CN 201420581505 U CN201420581505 U CN 201420581505U CN 204479646 U CN204479646 U CN 204479646U
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- electronic tag
- electric energy
- equipment control
- control electronic
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- 238000001514 detection method Methods 0.000 title claims abstract description 84
- 238000005070 sampling Methods 0.000 claims abstract description 32
- 238000012546 transfer Methods 0.000 claims description 6
- HPDFFVBPXCTEDN-UHFFFAOYSA-N copper manganese Chemical group [Mn].[Cu] HPDFFVBPXCTEDN-UHFFFAOYSA-N 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000012360 testing method Methods 0.000 abstract description 10
- 239000013078 crystal Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model discloses a kind of equipment control electronic tag current detection circuit, comprise current sampling resistor and detection module, current sampling resistor is connected in a wire of device power supply (DPS) line, the two ends of current sampling resistor connect two input ends of detection module respectively, the microcontroller of the output termination equipment control electronic tag of detection module.Current detection circuit volume of the present utility model is little, precision is high, can meet electronic tag to device current testing requirement.
Description
[technical field]
The utility model relates to current detection circuit, particularly relates to a kind of equipment control electronic tag current detection circuit.
[background technology]
Traditional equipment management system based on electronic tag only can add up existence and the quantity of equipment, effectively cannot manage meticulousr facility informations such as the running status of equipment, plant factor and residing location statuss.
In order to can the electronic tag of real-time monitoring equipment running status, the applicant has applied for the utility model patent of a kind of equipment control electronic tag and device power supply (DPS) line on February 26th, 2014, comprises input interface, output interface, cable and equipment control electronic tag.Equipment control electronic tag comprises microcontroller, radio circuit, power module and device current testing circuit, device current testing circuit is electrically connected or electric coupling with cable, the signal output part of device current testing circuit connects microcontroller, with the running status of effective monitoring equipment, the utilization factor of watch-dog, the efficiency of management of raising equipment, reduces handling cost.
Traditional device current testing circuit is made up of current transformer, signal conditioning circuit, analog to digital converter (ADC) and arithmetic element.Current transformer volume is large, low precision (general 2/1000ths), consistance are poor, add signal conditioning circuit connect thereafter, ADC and arithmetic element and all there is larger circuit volume, be not suitable for equipment control electronic tag small size, high-precision requirement.
[summary of the invention]
The technical problems to be solved in the utility model is to provide the equipment control electronic tag current detection circuit that a kind of volume is little, precision is high.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is, a kind of equipment control electronic tag current detection circuit, comprise current sampling resistor and detection module, current sampling resistor is connected in a wire of device power supply (DPS) line, the two ends of current sampling resistor connect two input ends of detection module respectively, the microcontroller of the output termination equipment control electronic tag of detection module.
Above-described equipment control electronic tag current detection circuit, detection module comprises the peripheral circuit of electric energy detection chip and electric energy detection chip.
Above-described equipment control electronic tag current detection circuit, described electric energy detection chip is AT90E25; Described current sampling resistor is copper-manganese sampling resistor.
Above-described equipment control electronic tag current detection circuit, it is characterized in that electric energy detection chip is connected with microcontroller by SPI interface, the SPI interface of electric energy detection chip comprises the serial clock pin of SPI, serial date transfer pin, serial date transfer pin and chip selection signal pin.
Above-described equipment control electronic tag current detection circuit, the active energy pulse output pin of electric energy detection chip connects the input I/O port of microcontroller.
Above-described equipment control electronic tag current detection circuit, current sampling resistor is connected in the live wire of device power supply (DPS) line, first port of current sampling resistor connects the L line current signal input anode of electric energy detection chip by the first low-pass filter circuit, second port of current sampling resistor connects the L line current signal input negative terminal of electric energy detection chip, the second port ground connection of current sampling resistor by the first low-pass filter circuit.
Above-described equipment control electronic tag current detection circuit, comprises bleeder circuit, the zero line of the termination device power lead of bleeder circuit, other end ground connection, the voltage signal input anode pin of the output termination electric energy detection chip of bleeder circuit; The voltage signal input negative terminal pin of electric energy detection chip is by the 4th resistance eutral grounding.
Above-described equipment control electronic tag current detection circuit, digital power pin and the configuration quantitative model pin of electric energy detection chip directly connect chip power; Chip power connects the analog power pin of electric energy detection chip by the 3rd low-pass filter circuit.
Above-described equipment control electronic tag current detection circuit, the reset pin of electric energy detection chip connects chip power by the second resistance, by the first capacity earth.
The utility model equipment control electronic tag current detection circuit volume is little, precision is high, can meet electronic tag to device current testing requirement.
[accompanying drawing explanation]
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is the theory diagram of the utility model embodiment equipment control electronic tag.
Fig. 2 is the schematic diagram of the utility model embodiment current detection circuit.
Fig. 3 is the wiring diagram of the utility model embodiment microcontroller.
[embodiment]
The principle of the utility model embodiment equipment control electronic tag current detection circuit as shown in Figure 1 to Figure 3.
As shown in Figure 1, equipment control electronic tag comprises microcontroller (MCU), radio circuit, AC/DC power module and device current testing circuit, and the signal output part of device current testing circuit connects microcontroller.Device current testing circuit is sampled to the working current that cable flows through by current sampling resistor, and current sampling resistor is directly serially connected in a wire of cable.
The device current testing circuit of electronic tag comprises current sampling resistor and detection module, and current sampling resistor is serially connected in the live wire of cable, and the two ends of current sampling resistor connect two input ends of detection module respectively, the output termination microcontroller of detection module.
The detection module of the present embodiment adopts electric energy detection chip to be AT90E25.This chip can measure electric current by the method measuring power, inside electric energy meter industry, applies very extensive.The inner integrated special ADC of AT90E25 and gain amplifier, and be furnished with special DSP processor, only just need easily can complete measurement to power by SPI mouth, and have the advantage that degree of accuracy is high, cost is low, volume is little.
The detection module of current detection circuit is made up of electric energy computation chip (AT90E25) and peripheral circuit thereof.Peripheral circuit comprises the parts such as crystal oscillator, sampling resistor zero line divider resistance, power supply coupling capacitor.
This electric circuit inspection live wire electric current, meanwhile, live wire is as the reference ground of current detection circuit.Electric energy computation chip has two-way current detecting interface, and the utility model only uses one road.The crystal oscillator that crystal oscillator connects electric energy computation chip drives pin (OSCO and OSCI).
Live wire is from the 1 port input of copper-manganese sampling resistor J14, and 2 ports export, and 2 ports are by 3 port ground connection.
The first low-pass filter circuit that 1 port connecting resistance R2 of sampling resistor and electric capacity C1 forms, the second low-pass filter circuit that 2 port connecting resistance R3 and electric capacity C2 form, the other end of resistance R2 and R3 receives the L line current signal input anode pin I1P and negative terminal pin I1N of electric energy detection chip.
Resistance R10, R11, R9, R8, R7, R6 and resistance R5 connect, and form bleeder circuit, filter capacitor C4 is in parallel with resistance R5, a terminal connecting zero line N-LINE of voltage divider circuit Resistance R10, one end ground connection of voltage divider circuit Resistance R5.The voltage signal input anode pin VP of the output terminal electric energy detection chip of bleeder circuit, the voltage signal input negative terminal pin VN of electric energy detection chip is by resistance R4 and electric capacity C3 ground connection.This two voltage detecting pin effect detects neutral voltage zero crossing, for the synchronized sampling cycle.
The digital power pin DVDD of electric energy detection chip and the direct 3.3V chip power of configuration quantitative model pin MMDI, MMDO.3.3V chip power meets the analog power pin AVDD of electric energy detection chip by the 3rd low-pass filter circuit that resistance R12 and electric capacity C5 forms.
Resistance R13 and electric capacity C7 forms rc reset circuit, and provide a reset signal to chip during for powering on, the reset pin RESET of electric energy detection chip connects 3.3V chip power by resistance R13, by electric capacity C7 ground connection.
Electric energy detection chip is connected with microcontroller by SPI interface, and the SPI interface of electric energy detection chip comprises the serial clock pin SCLK of SPI, serial date transfer pin SDI, serial date transfer pin SDO and chip selection signal pin CS.The active energy pulse output pin CF1 of electric energy detection chip is used to indicate sampling and completes, and connects the input I/O port of microcontroller
The special electric energy detection chip of the above embodiment of the utility model equipment control electronic tag current detection circuit, be integrated with signal condition, analog to digital conversion and digital signal processing unit, coordinate copper-manganese sampling resistor, have very little volume and very high precision, volume and precision can meet the requirement of electronic tag current detecting.
Claims (9)
1. an equipment control electronic tag current detection circuit, it is characterized in that, comprise current sampling resistor and detection module, current sampling resistor is connected in a wire of device power supply (DPS) line, the two ends of current sampling resistor connect two input ends of detection module respectively, the microcontroller of the output termination equipment control electronic tag of detection module.
2. equipment control electronic tag current detection circuit according to claim 1, it is characterized in that, detection module comprises the peripheral circuit of electric energy detection chip and electric energy detection chip.
3. equipment control electronic tag current detection circuit according to claim 2, is characterized in that, described electric energy detection chip is AT90E25; Described current sampling resistor is copper-manganese sampling resistor.
4. equipment control electronic tag current detection circuit according to claim 2, it is characterized in that electric energy detection chip is connected with microcontroller by SPI interface, the SPI interface of electric energy detection chip comprises the serial clock pin of SPI, serial date transfer pin, serial date transfer pin and chip selection signal pin.
5. equipment control electronic tag current detection circuit according to claim 2, is characterized in that, the active energy pulse output pin of electric energy detection chip connects the input I/O port of microcontroller.
6. equipment control electronic tag current detection circuit according to claim 2, it is characterized in that, current sampling resistor is connected in the live wire of device power supply (DPS) line, first port of current sampling resistor connects the L line current signal input anode of electric energy detection chip by the first low-pass filter circuit, second port of current sampling resistor connects the L line current signal input negative terminal of electric energy detection chip, the second port ground connection of current sampling resistor by the first low-pass filter circuit.
7. equipment control electronic tag current detection circuit according to claim 2, it is characterized in that, comprise bleeder circuit, the zero line of the termination device power lead of bleeder circuit, other end ground connection, the voltage signal input anode pin of the output termination electric energy detection chip of bleeder circuit; The voltage signal input negative terminal pin of electric energy detection chip is by the 4th resistance eutral grounding.
8. equipment control electronic tag current detection circuit according to claim 2, is characterized in that, digital power pin and the configuration quantitative model pin of electric energy detection chip directly connect chip power; Chip power connects the analog power pin of electric energy detection chip by the 3rd low-pass filter circuit.
9. equipment control electronic tag current detection circuit according to claim 2, is characterized in that, the reset pin of electric energy detection chip connects chip power by the second resistance, by the first capacity earth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420581505.7U CN204479646U (en) | 2014-10-08 | 2014-10-08 | A kind of equipment control electronic tag current detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420581505.7U CN204479646U (en) | 2014-10-08 | 2014-10-08 | A kind of equipment control electronic tag current detection circuit |
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| Publication Number | Publication Date |
|---|---|
| CN204479646U true CN204479646U (en) | 2015-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420581505.7U Expired - Lifetime CN204479646U (en) | 2014-10-08 | 2014-10-08 | A kind of equipment control electronic tag current detection circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105182214A (en) * | 2015-08-05 | 2015-12-23 | 烽火通信科技股份有限公司 | 1-wire-communciation-based detection circuit and method of in-place state of electronic tag |
| CN107894562A (en) * | 2017-12-15 | 2018-04-10 | 北斗航天汽车（北京）有限公司 | Automobile circuit plate and its detecting system |
| CN116106623A (en) * | 2023-04-12 | 2023-05-12 | 浙江恒业电子股份有限公司 | Dual-power calculation single-phase electric energy meter and method for non-isolated sampling alternating current |
-
2014
- 2014-10-08 CN CN201420581505.7U patent/CN204479646U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105182214A (en) * | 2015-08-05 | 2015-12-23 | 烽火通信科技股份有限公司 | 1-wire-communciation-based detection circuit and method of in-place state of electronic tag |
| CN105182214B (en) * | 2015-08-05 | 2018-03-20 | 烽火通信科技股份有限公司 | The detection circuit and method of electronic tag state in place based on 1 wire communications |
| CN107894562A (en) * | 2017-12-15 | 2018-04-10 | 北斗航天汽车（北京）有限公司 | Automobile circuit plate and its detecting system |
| CN116106623A (en) * | 2023-04-12 | 2023-05-12 | 浙江恒业电子股份有限公司 | Dual-power calculation single-phase electric energy meter and method for non-isolated sampling alternating current |
| CN116106623B (en) * | 2023-04-12 | 2023-08-29 | 浙江恒业电子股份有限公司 | Dual-power calculation single-phase electric energy meter and method for non-isolated sampling alternating current |
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| CX01 | Expiry of patent term |
Granted publication date: 20150715 |