CN201555893U - Distribution type alternating current sampling device - Google Patents
Distribution type alternating current sampling device Download PDFInfo
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- CN201555893U CN201555893U CN2009200151839U CN200920015183U CN201555893U CN 201555893 U CN201555893 U CN 201555893U CN 2009200151839 U CN2009200151839 U CN 2009200151839U CN 200920015183 U CN200920015183 U CN 200920015183U CN 201555893 U CN201555893 U CN 201555893U
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Abstract
The utility model belongs to the field of alternating current sampling equipment, in particular relates to a distribution type alternating current sampling device. The distribution type alternating current sampling device comprises a central processing module, a switch/ pulse quantity input unit, a switching value output unit, a display unit, an interface circuit and a function selection unit; an output terminal of the central processing module is sequentially connected with the input terminals of the display unit, the interface circuit and the switching value output unit; the output terminals of the function selection unit and the switch/ pulse quantity input unit are connected with an input terminal of the central processing module. The distribution type alternating current sampling device is also provided with a remote measuring circuit and a cycle detection module; the output terminals of the remote measuring circuit and the cycle detection module are connected with the input terminal of the central processing module. The distribution type alternating current sampling device has the advantages of simple structure, low cost, strong anti-interference capability, small temperature drift and high precision and low power consumption in terms of low signal, nonlinearity and phase angle.
Description
Technical field
The utility model belongs to the AC sampling apparatus field, relate in particular to a kind of alternating voltage and electric current and carry out data sampling and calculate parameters such as power, electric degree, power factor, frequency voluntarily, also possess the distributed ac sampling device of remote signalling, remote measurement, remote control, remote regulating function and the data exchanging function of conventional telemechanical apparatus simultaneously electric line.
Background technology
Along with electronic product adopts the LSI circuit of low-power consumption, high precision, high integration more and more and makes AC sampling equipment than the whenever easier threat that is subjected to electromagnetic interference (EMI) in the past.And meanwhile, powerful equipment is being on the increase, and has increased the generation source of electromagnetic disturbance again greatly, and these variations force people that electromagnetic compatibility is kept a close eye on as the important techniques problem.
Because it is big that conventional AC measurment circuit temperature is floated factor affecting, obvious in the error that causes aspect small-signal, the non-linear and phasing degree, make the measuring accuracy of this kind equipment be subjected to certain restriction.The reliability of system and stability are difficult to be guaranteed.
The utility model content
The utility model is intended to overcome the deficiencies in the prior art part and provides a kind of simple in structure, and cost is low, and antijamming capability is strong, and it is little that temperature is floated, and precision height aspect small-signal, non-linear and phasing degree is low in energy consumption, the distributed ac sampling device that operational reliability is high.
For achieving the above object, the utility model is achieved in that
Distributed ac sampling device, it comprises central processing module, switch/pulsed quantity input block, switching value output unit, display unit, interface circuit and function selecting unit; The output terminal of described central processing module joins with the input end of display unit, interface circuit, switching value output unit successively; The input end of the output termination central processing module of described function selecting unit and switch/pulsed quantity input block.
As a kind of preferred version, the utility model also is provided with telemetric circuit and cycle detection module; The input end of the output termination central processing module of described telemetric circuit and cycle detection module.
As another kind of preferred version, central processing module described in the utility model adopts the N80C196KB single-chip microcomputer.
Further, switching value output unit described in the utility model comprises chip for driving and relay; The port of described chip for driving is connected in series with relay;
Central processing module is carried out and is closed or jump order, and the exclusive circuit of at first will close, jumping is opened, and descends the pre-activity order again, carries out contact then and returns to school, and after the success, opens the execution exclusive circuit, descends fill order again, thereby finishes the work that closes, beats.
Further, interface circuit described in the utility model comprises the RS-422 interface circuit, and it mainly is made up of the first photoelectricity coupling module and interface chip; The port of the port connection interface chip of the described first photoelectricity coupling module.
In addition, interface circuit described in the utility model also comprises the CAN interface circuit, and it mainly is made up of the bus transceiver and the second photoelectricity coupling module; The port of described bus transceiver connects the port of the second photoelectricity coupling module.
Secondly, telemetric circuit described in the utility model and cycle detection module comprise mutual inductor, A/D modular converter, analog switch and protected location; The output port of described mutual inductor connects the input port of protected location; The output port of described protected location connects the input port of analog switch; The output port of described analog switch connects the input port of A/D modular converter.
Once more, switch described in the utility model/pulsed quantity input block comprises the 3rd photoelectricity coupling module and filter protective circuit; The port of described the 3rd photoelectricity coupling module connects the port of filter protective circuit;
The external switch state is reflected to central processing module with state after the 3rd photoelectricity coupling module photoelectricity is isolated, read operation is read in central processing module with state, finishes remote signalling/step-by-step counting function.
Display unit described in the utility model comprises that output latch unit and LED show lamp plate; The port of described output latch unit meets LED and shows the lamp plate port.
The professional technique of the utility model COMPREHENSIVE CALCULATING machine, measurement, communication and power automation is an one, by sampled data to the alternating voltage and the electric current of electric line, calculate parameters such as power, electric degree, power factor, frequency voluntarily, also possess remote signalling, remote measurement, remote control, remote regulating function and the data exchanging function of conventional telemechanical apparatus simultaneously.
The constraint of original telemechanical apparatus design philosophy has been broken away from design of the present utility model, initiative at home employing the distributed intelligence system architecture of loose type bus and the instrument modular form of telemechanical product.Compare its combination property with conventional products breakthrough improvement has been arranged, real-time, the accuracy of data have been improved significantly, improve anti-interference impact and operational reliability, reduced installation, maintenance, expansion condition and difficulty significantly, reduced the service requirement of place environment.
The utility model is furnished with multiple functional module towards professional application, can be object with the circuit, configuration can reach the full remote moving function of 64 circuits, can be object with the measurement parameter also, be configured to specially to function, its flexibly, convenient, simple degree with the transmission device epiphase with.
The utility model AC measurment circuit effectively suppressed temperature and floated, and reduced small-signal, non-linear and error that the phasing degree causes, and measuring accuracy is obviously improved.Because the wringing fit form of AC measurment and telemechanical apparatus has reduced intermediary electrical conversion links and connecting link, has also increased reliability, has reduced cost, has made things convenient for user's installation and maintenance.
The utility model is in design process, the N80196KB16 position one-chip computer of Intel Company is adopted in the core, and be aided with CPLD and microcontroller and monitor chip, make the system hardware configuration rigorous, telotism, the software arrangements compactness flexibly, is a nucleus module of forming feeder automation and watch-dog.The utility model has adopted miniature AC voltage transformer and miniature AC current transformer, the employing of this mutual inductor has overcome conventional transmitter temperature and has floated greatly, the big shortcoming of little current signal error, and the non-linear and angular distortion mutually of transmitter, the transformer poor reliability and the low deficiency of precision that cause, removed conventional transmitter intermediate conversion links, reduce cost, alleviated the burden of user aspect installation and maintenance.In addition, the temperature range of module has been widened in all employings of CMOS chips and SMT technology, has reduced power consumption, and has strengthened the stability and the reliability of system.Improved the antijamming capability of system.
Description of drawings
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.Protection domain of the present utility model not only is confined to the statement of following content.
Fig. 1 is the whole theory diagram of circuit of the present utility model;
Fig. 2 is a kind of embodiment schematic block circuit diagram of the utility model;
Fig. 3 is the utility model central processing portion physical circuit schematic diagram;
Fig. 4 is the utility model display circuit physical circuit schematic diagram;
Fig. 5 is the utility model telemetric circuit and cycle test section physical circuit schematic diagram;
Fig. 6 is the utility model switch/pulsed quantity input block physical circuit schematic diagram;
Fig. 7 is the utility model switching value output unit physical circuit schematic diagram.
Embodiment
As shown in Figure 1, 2, a kind of distributed ac sampling device, it comprises central processing module, switch/pulsed quantity input block, switching value output unit, display unit, interface circuit and function selecting unit; The output terminal of described central processing module joins with the input end of display unit, interface circuit, switching value output unit successively; The input end of the output termination central processing module of described function selecting unit and switch/pulsed quantity input block.
The utility model also is provided with telemetric circuit and cycle detection module; The input end of the output termination central processing module of described telemetric circuit and cycle detection module.
As shown in Figure 3, central processing module described in the utility model adopts the N80C196KB single-chip microcomputer.
As shown in Figure 7, switching value output unit described in the utility model comprises chip for driving D15 and relay K 1, K2, K3; The port of described chip for driving D15 is connected in series with relay K 1, K2, K3;
The utility model central processing module is carried out and is closed or jump order, and the exclusive circuit of at first will close, jumping is opened and descended the pre-activity order again, carries out contact then and returns to school, and after the success, opens the execution exclusive circuit, descends fill order again, thereby finishes the work that closes, beats.
As shown in Figure 7, interface circuit described in the utility model comprises the RS-422 interface circuit, and it mainly is made up of the first photoelectricity coupling module D19, D20, D21 and interface chip D17, D18; The port connection interface chip D17 of the described first photoelectricity coupling module D19, D20, D21, the port of D18.
As shown in Figure 7, interface circuit described in the utility model also comprises the CAN interface circuit, and it mainly is made up of bus transceiver D30 and the second photoelectricity coupling module D31, D32; The port of described bus transceiver D30 connects the port of the second photoelectricity coupling module D31, D32.
As shown in Figure 5, telemetric circuit described in the utility model and cycle detection module comprise mutual inductor T1, T2, T3, T4, T5, A/D modular converter D11, analog switch D9 and protected location D1, D2, D3, D4, D5; The output port of described mutual inductor T1, T2, T3, T4, T5 meets protected location D1, D2, D3, D4, the input port of D5; Described protected location D1, D2, D3, D4, the output port of D5 connects the input port of analog switch D9; The output port of described analog switch D9 connects the input port of A/D modular converter D11.
As shown in Figure 6, switch described in the utility model/pulsed quantity input block comprises the 3rd photoelectricity coupling module D12, D13, D14 and filter protective circuit; The port of described the 3rd photoelectricity coupling module D12, D13, D14 connects the port of filter protective circuit;
The utility model external switch state is reflected to central processing module with state after the 3rd photoelectricity coupling module D12, D13, D14 photoelectricity are isolated, read operation is read in central processing module with state, finishes remote signalling/step-by-step counting function.
As shown in Figure 4, display unit described in the utility model comprises that output latch cells D 17, D18, D19 and LED show lamp plate; The port of described output latch cells D 17, D18, D19 meets LED and shows lamp plate.Technical indicator
1.1 function
1.1.1 basic function
A) collection is calculated and is sent line voltage to a distant place: Uab, Ucb;
B) collection is calculated and is sent phase current: Ia, Ib, Ic to a distant place;
C) gather and send six line state amount information (switching value input) to a distant place, the remote signalling displacement preferentially transmits;
D) gather and send two-way electricity information or digital information to a distant place;
E) receive and carry out 2 road guidance commands (switching value output), and the foldback verification;
F) gather the ac electric frequency, promptly cycle detects; And send to a distant place;
G) calculate and send active power, reactive power, active electrical degree, idle electric degree, the power factor of a circuit to a distant place;
H) has the program self-recovering function;
I) pass through the RS-485 communication interface with the host computer swap data as the substation;
J) function that has the collection event journal and send to a distant place;
K) has the function of accepting and carrying out the involution order.
1.1.2 other function
A) duty is indicated by display window;
B) plug type terminal row;
C) has the system voltage function for monitoring;
D) has the hardware watchdog function;
E) has the hand-reset function.
1.2 technical parameter
A) terminal: through-current capacity 20A;
Dielectric strength 2500V;
B) alternating voltage input: nominal value 0～100V, the maximum input 120V that allows;
C) alternating current input: nominal value 0～5A, the maximum input 6A that allows;
D) remote signalling input: DC voltage 12V, 24V;
Input end adopts photoelectricity to isolate isolation voltage 1500V;
Temporal resolution≤4ms;
E) pulsed quantity input: pulse voltage 5V, 12V, 24V;
Input end adopts photoelectricity to isolate isolation voltage 1500V;
Pulse width 〉=10ms;
F) remote control output: bring the school function back to;
Contact divides three kinds: close, jump, carry out;
Relay tip capacity 24V DC 1A;
G) analog to digital conversion: 12 of resolution;
Switching times 10 μ s;
Linear error ± 0.5LSB;
H) working power :+24V (300mA);
Power: 7.2W;
I) environmental baseline:
1) work atmospheric conditions
Environment temperature :-25 ℃～+ 55 ℃;
Relative humidity: 5%～95%;
Atmospheric pressure: 66kPa～108kPa;
2) surrounding environment requirement
There are no strenuous vibration impulse source in no explosion danger, non-corrosiveness gas and electro-conductive dust, no serious mould.
J) physical dimension: 250mm * 110mm * 83mm;
K) weight: 1.8kg.
1.3 the technical indicator of ac electric quantity measuring
A) measure content
The voltage of single-phase or three-phase system, electric current, active power, reactive power, active electrical degree, idle electric degree, frequency, power factor;
B) accuracy
Voltage, 0.2 grade in electric current;
0.5 grade of active power;
0.5 grade of reactive power;
Active electrical degree, 0.5 grade of idle electric degree;
0.5 grade of power factor;
0.1 grade of frequency;
C) nominal range
Alternating voltage 0～100V (maximum 120V);
Alternating current 0～5A (maximum 6A);
Frequency 45～55Hz;
Power factor 0～1～0 leading or hysteresis;
Environment temperature-25 ℃～+ 55 ℃;
D) load power consumption
Voltage circuit power consumption＜0.50VA
Current return power consumption＜0.75VA
E) overload input
Continuous over loading input: alternating voltage 120V
Alternating current 6A
Short-term overload input: alternating voltage 200V 10S
Alternating current 100A 1S
F) dielectric strength
AC power frequency input signal end is to casing＞2000V
The remote signalling input circuit is to casing＞500V
Between non-electric-connecting two independent circuits＞500V
G) insulation resistance
〉=20M Ω (500V M Ω table).
2.2 working principle of hardware
This module comprises following functional circuit:
A) N80C196KB Single Chip Microcomputer (SCM) system;
B) LED display circuit;
C) switching value, the pulsed quantity input circuit;
D) switching value output circuit;
E) telemetric circuit and cycle testing circuit;
F) communication interface circuit.
Now details are as follows respectively with the principle of work of each functional circuit:
2.2.1N80C196KB Single Chip Microcomputer (SCM) system
As shown in Figure 3, native system monitors chip by D13 (N80C196KB) single-chip microcomputer, D14 (27C256) EPROM, D16 (61C256) SRAM, D7 (74HC373), D8 (74HC373) address latch, D15 (MACH211SP) decoding scheme, D11 (DS1232L) microcontroller of mainboard, and G1 (16MHZ) system clock is formed.
2.2.2LED display circuit
As shown in Figure 4, this circuit is made up of D13 (N80C196KB) single-chip microcomputer, D17 (74HC273), D18 (74HC273), D19 (74HC273) output latch unit and the LED demonstration lamp plate of mainboard.
2.2.3 switching value, pulsed quantity input circuit (remote signalling)
As shown in Figure 6, this circuit is made up of D13 (N80C196KB) single-chip microcomputer of mainboard and D12 (TLP521-4), D13 (TLP521-2) photo-coupler and filtering and the holding circuit of base plate.
The external switch state is reflected to CPU to state after base plate D12, D13 (TLP521-4/2) photoelectricity is isolated, read operation is read in CPU to state, finishes remote signalling/step-by-step counting function.
2.2.4 switching value output circuit (remote control)
As shown in Figure 7, this circuit is made up of D13 (N80C196KB) single-chip microcomputer of mainboard and D15 (ULN2003) driving circuit, K1, K2, the K3 relay of base plate.
CPU carries out and closes or jump order, at first the exclusive circuit that closes, jumps is opened, and descends the pre-activity order again, carries out contact then and returns to school, and after the success, opens the execution exclusive circuit, descends fill order again, thereby finishes the work that closes, beats.
2.2.5 telemetric circuit and cycle testing circuit
As shown in Figure 5, this circuit is by D13 (N80C196KB) single-chip microcomputer of mainboard and D11 (AD774) A/D converter, D10 (LF411), D9 (MPC508A), the D1 of base plate, D2, and D3, D4, D5 (LF398), 2 PT, 3 CT form.
0～120V alternating voltage and 0～6A alternating current, become the alternating voltage of 0～5V through PT and CT mutual inductor, by the maintenance of sampling of the sampling hold circuit of CPU control base plate, pass through D9 (MPC508A) analog switch then and every road signal is delivered to D11 (ADS774) changes, CPU reads conversion value, utilize again to exchange the calculating that algorithm is finished relevant parameters of electric power.
2.2.6 communication interface circuit
As shown in Figure 7, RS-422 interface: this circuit is by the D13 (N80C196KB) of mainboard, the D13 of power panel (DCP010505), D19, D20 (6N137), D21 (6N137), D17, D18 compositions such as (75LBC184).
The CAN interface: this circuit is made up of D13 (N80C196KB), CAN bus transceiver D30 (PCA82C250), D31 (6N137), the D32 (6N137) etc. of mainboard.
2.3 system address allocation table
Address in the 0000H-1FFFH R/W N80C196KB single-chip microcomputer sheet;
2000H-2011H R interrupt vector address;
The 2012H-207FH reserved address;
The outer ROM address of 2080H-7FFFH R single-chip microcomputer sheet;
8000H-FEFFH R/W single-chip microcomputer ram in slice address;
FFOOH-FF07H R/W 8250 addresses;
FF08H-FFOAH W display lamp address;
The FFOBH W b0-b4 analog switch gating b5-b7 selection that gains;
High 4 bit data of FFOCH R b0-b3 remote measurement;
B4 A/D EOC zone bit;
Current state is carried out in b5 remote control 0;
The b6 remote control 0 preceding state that is fated;
Current state is jumped in b7 remote control 0;
FFODH R remote measurement least-significant byte data;
FFOE W b0 remote control 0 is carried out;
B1 remote control 0 is closed;
B2 remote control 0 is jumped;
B3 remote control 1 is carried out;
B4 remote control 1 is closed;
B5 remote control 1 is jumped;
B6 lamp 11;
B7 lamp 14;
Outer returning to school carried out in FFOF R b0 remote control 0;
Outer returning to school closed in b1 remote control 0;
Outer returning to school jumped in b2 remote control 0;
Outer returning to school carried out in b3 remote control 1;
Outer returning to school closed in b4 remote control 1;
Outer returning to school jumped in b5 remote control 1;
Current state is carried out in b6 remote control 1;
FF10H R b0-b5 6 tunnel remote signalling addresses;
The b6 remote control 1 preceding state that is fated;
Current state is jumped in b7 remote control 1;
FF11H R/W CAN port address.
Claims (9)
1. a distributed ac sampling device is characterized in that, comprises central processing module, switch/pulsed quantity input block, switching value output unit, display unit, interface circuit and function selecting unit; The output terminal of described central processing module joins with the input end of display unit, interface circuit, switching value output unit successively; The input end of the output termination central processing module of described function selecting unit and switch/pulsed quantity input block.
2. distributed ac sampling device according to claim 1 is characterized in that: also be provided with telemetric circuit and cycle detection module; The input end of the output termination central processing module of described telemetric circuit and cycle detection module.
3. distributed ac sampling device according to claim 1 and 2 is characterized in that: described central processing module adopts the N80C196KB single-chip microcomputer.
4. distributed ac sampling device according to claim 3 is characterized in that: described switching value output unit comprises chip for driving (D15) and relay (K1, K2, K3); The port of described chip for driving (D15) is connected in series with relay (K1, K2, K3);
Central processing module is carried out and is closed or jump order, and the exclusive circuit of at first will close, jumping is opened, and descends the pre-activity order again, carries out contact then and returns to school, and after the success, opens the execution exclusive circuit, descends fill order again, thereby finishes the work that closes, beats.
5. distributed ac sampling device according to claim 4 is characterized in that: described interface circuit comprises the RS-422 interface circuit, and it mainly is made up of first photoelectricity coupling module (D19, D20, D21) and interface chip (D17, D18); The port of the port connection interface chip (D17, D18) of the described first photoelectricity coupling module (D19, D20, D21).
6. distributed ac sampling device according to claim 5 is characterized in that: described interface circuit also comprises the CAN interface circuit, and it mainly is made up of bus transceiver (D30) and the second photoelectricity coupling module (D31, D32); The port of described bus transceiver (D30) connects the port of the second photoelectricity coupling module (D31, D32).
7. distributed ac sampling device according to claim 2, it is characterized in that: described telemetric circuit and cycle detection module comprise mutual inductor (T1, T2, T3, T4, T5), A/D modular converter (D11), analog switch (D9) and protected location (D1, D2, D3, D4, D5); The output port of described mutual inductor (T1, T2, T3, T4, T5) connects protected location (D1, D2, D3, D4, input port D5); Described protected location (D1, D2, D3, D4, output port D5) connects the input port of analog switch (D9); The output port of described analog switch (D9) connects the input port of A/D modular converter (D11).
8. distributed ac sampling device according to claim 6 is characterized in that: described switch/pulsed quantity input block comprises the 3rd photoelectricity coupling module (D12, D13, D14) and filter protective circuit; The port of described the 3rd photoelectricity coupling module (D12, D13, D14) connects the port of filter protective circuit;
The external switch state is reflected to central processing module with state after the 3rd photoelectricity coupling module (D12, D13, D14) photoelectricity is isolated, read operation is read in central processing module with state, finishes remote signalling/step-by-step counting function.
9. distributed ac sampling device according to claim 8 is characterized in that: described display unit comprises that output latch unit (D17, D18, D19) and LED show lamp plate; The port of described output latch unit (D17, D18, D19) meets LED and shows the lamp plate port.
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|---|---|---|---|
| CN2009200151839U CN201555893U (en) | 2009-07-09 | 2009-07-09 | Distribution type alternating current sampling device |
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|---|---|---|---|
| CN2009200151839U CN201555893U (en) | 2009-07-09 | 2009-07-09 | Distribution type alternating current sampling device |
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| CN201555893U true CN201555893U (en) | 2010-08-18 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102591308A (en) * | 2012-03-12 | 2012-07-18 | 长治市潞安合力机械有限责任公司 | Controller area network (CAN) bus mining locomotive control, measurement and protection device |
| CN102582638A (en) * | 2012-03-12 | 2012-07-18 | 长治市潞安合力机械有限责任公司 | Mine locomotive control measurement protection device based on controller area network (CNA) bus |
| CN103970027A (en) * | 2014-04-02 | 2014-08-06 | 北京控制工程研究所 | Telemetry processing unit simulation method in integrated electronic simulation software environment |
| CN104155517A (en) * | 2014-09-03 | 2014-11-19 | 国家电网公司 | Error compensation method and system for non-full period sampling of digital electric energy meter |
| CN105302023A (en) * | 2015-11-09 | 2016-02-03 | 河南丹枫科技有限公司 | Low-power-consumption adjustable signal acquisition mainboard based on ARM |
| CN105572464A (en) * | 2015-12-07 | 2016-05-11 | 安徽新创建材科技有限公司 | Distributed industrial micro-voltage signal acquisition device and method |
-
2009
- 2009-07-09 CN CN2009200151839U patent/CN201555893U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102591308A (en) * | 2012-03-12 | 2012-07-18 | 长治市潞安合力机械有限责任公司 | Controller area network (CAN) bus mining locomotive control, measurement and protection device |
| CN102582638A (en) * | 2012-03-12 | 2012-07-18 | 长治市潞安合力机械有限责任公司 | Mine locomotive control measurement protection device based on controller area network (CNA) bus |
| CN103970027A (en) * | 2014-04-02 | 2014-08-06 | 北京控制工程研究所 | Telemetry processing unit simulation method in integrated electronic simulation software environment |
| CN104155517A (en) * | 2014-09-03 | 2014-11-19 | 国家电网公司 | Error compensation method and system for non-full period sampling of digital electric energy meter |
| CN104155517B (en) * | 2014-09-03 | 2017-03-08 | 国家电网公司 | A kind of non-integer-period sampled error compensating method of digitalized electrical energy meter and system |
| CN105302023A (en) * | 2015-11-09 | 2016-02-03 | 河南丹枫科技有限公司 | Low-power-consumption adjustable signal acquisition mainboard based on ARM |
| CN105572464A (en) * | 2015-12-07 | 2016-05-11 | 安徽新创建材科技有限公司 | Distributed industrial micro-voltage signal acquisition device and method |
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