CN212159933U - Ammeter based on RS485 data routing sharing - Google Patents
Ammeter based on RS485 data routing sharing Download PDFInfo
- Publication number
- CN212159933U CN212159933U CN201921982777.7U CN201921982777U CN212159933U CN 212159933 U CN212159933 U CN 212159933U CN 201921982777 U CN201921982777 U CN 201921982777U CN 212159933 U CN212159933 U CN 212159933U
- Authority
- CN
- China
- Prior art keywords
- data routing
- circuit
- electric quantity
- meter according
- chip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The utility model provides an ammeter based on RS485 data route sharing, this table circuit is simple, control is convenient, has realized single-phase electricity, three-phase electricity dual-purpose, and a table is multi-purpose, can also monitor voltage, electric current, power consumption and the cable temperature of 3 way single-phase electric consumer simultaneously, has greatly improved the monitoring circuit number, satisfies the demand that the user wants to acquire many branch road consumer states; this table adopts collection module, and the module lead wire corresponds electronic connection with the mainboard, has reduced the space, has practiced thrift the cost, and with the intelligent terminal communication of checking meter, can realize that the electric quantity is concentrated to be copied, the dependable performance, and the transmission is fast, and the transmission is accurate, and the procedure is stable, and the outward appearance is pleasing to the eye easy installation moreover.
Description
Technical Field
The utility model relates to a smart electric meter field, more specifically relates to an ammeter based on RS485 data routing sharing.
Background
With the higher and higher requirements for automatic meter reading of metering, in order to ensure reliable meter reading of a user in a spot transaction, a user who directly purchases electricity in a market must perform double-terminal and double-channel transformation; the electricity consumption of transaction users is generally large, and in order to prevent the risk of electricity charge recovery, prepayment control needs to be adopted for the users; because the communication between the load management terminal and the electric energy meter and the communication between the electric energy meter and the electricity selling controller are all communicated through RS485, the sensitivity of the input end of the RS485 bus capable of identifying is +/-200 mV, the field charging meter only has two RS485 ports, if the standby terminal and the electricity selling controller are simply connected in parallel to the same RS485 port, the standby terminal and the electricity selling controller can obtain numbers at the same time, the voltage of the RS485 bus can not reach the standard requirement of-200 mV, the communication failure can be caused or the acquired data is wrong, and the risk of mistakenly jumping the prepayment switch is caused, so that the field RS485 interface can not simultaneously meet the problem of accessing the double terminals and the prepayment controller.
SUMMERY OF THE UTILITY MODEL
The utility model provides a shared ammeter of RS485 data route, this ammeter dependable performance, the transmission is fast, and the transmission is accurate.
In order to achieve the above technical effects, the technical scheme of the utility model as follows:
an ammeter based on RS485 data routing sharing comprises an RS485 communication circuit, a temperature acquisition module, an electric quantity acquisition module, an ARM processor unit, a magnetic latching relay and a bidirectional drive circuit; and the RS485 communication circuit, the temperature acquisition module, the electric quantity acquisition module, the magnetic latching relay and the bidirectional drive circuit are respectively connected with the ARM processor unit.
Furthermore, the electric quantity acquisition module comprises an alternating voltage sampling sub-circuit, and the alternating voltage sampling sub-circuit comprises a three-phase metering chip and a voltage transformer which are connected in sequence.
Furthermore, the electric quantity acquisition module further comprises an alternating current sampling sub-circuit, and the alternating current sampling sub-circuit comprises a three-phase metering chip and a current transformer which are sequentially connected.
Furthermore, the temperature acquisition module comprises a sampling resistor and a thermistor temperature probe, and the sampling resistor and the thermistor temperature probe form a series voltage division circuit.
Preferably, the resistance value of the sampling resistor is 5-10k omega; the resistance of the thermistor temperature probe decreases as the cable temperature increases.
Furthermore, the ARM processor unit comprises an ARM chip, an ID identification unit and a time management unit; the ID identification unit and the time management unit are respectively connected with the ARM chip.
Furthermore, the ID identification unit is provided with an ID number which is specially assigned to each intelligent electric meter, and the ID number is used for identifying when data interaction is realized with an external intelligent host, so that data identification errors of the intelligent electric meter equipment by the external intelligent host are prevented.
Furthermore, the electric quantity acquisition module is provided with a pulse indicator lamp and a meter calibration terminal, the pulse indicator lamp is connected with the data terminal of the electric quantity acquisition module, and the meter calibration terminal is connected with the pulse output end of the electric quantity acquisition module.
Preferably, the RS485 communication circuit adopts a BC184 type RS485 chip and is connected with any external intelligent host supporting RS485 communication protocol.
Preferably, the ARM chip is an ARM9 chip.
Compared with the prior art, the utility model discloses technical scheme's beneficial effect is:
the utility model discloses smart electric meter circuit is simple, control is convenient, has realized single-phase electricity, three-phase electricity dual-purpose, and a table is multi-purpose, can also monitor 3 way single-phase electricity consumer's voltage, electric current, power consumption and cable temperature simultaneously, has greatly improved the monitoring circuit number, satisfies the demand that the user wants to acquire many branch road consumer states; this table adopts collection module, and the module lead wire corresponds electronic connection with the mainboard, has reduced the space, has practiced thrift the cost, and with the intelligent terminal communication of checking meter, can realize that the electric quantity is concentrated to be copied, the dependable performance, and the transmission is fast, and the transmission is accurate, and the procedure is stable, and the outward appearance is pleasing to the eye easy installation moreover.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product;
it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical solution of the present invention will be further explained with reference to the accompanying drawings and examples.
As shown in fig. 1, an electric meter based on RS485 data routing sharing includes an RS485 communication circuit, a temperature acquisition module, an electric quantity acquisition module, an ARM processor unit, a magnetic latching relay, and a bidirectional driving circuit; and the RS485 communication circuit, the temperature acquisition module, the electric quantity acquisition module, the magnetic latching relay and the bidirectional drive circuit are respectively connected with the ARM processor unit.
The electric quantity acquisition module comprises an alternating voltage sampling sub-circuit, and the alternating voltage sampling sub-circuit comprises a three-phase metering chip and a voltage transformer which are connected in sequence; the electric quantity acquisition module also comprises an alternating current sampling sub-circuit, and the alternating current sampling sub-circuit comprises a three-phase metering chip and a current transformer which are connected in sequence.
The temperature acquisition module comprises a sampling resistor and a thermistor temperature probe, and the sampling resistor and the thermistor temperature probe form a series voltage division circuit; the resistance value of the sampling resistor is 5-10k omega; the resistance of the thermistor temperature probe decreases as the cable temperature increases.
The ARM processor unit comprises an ARM chip, an ID recognition unit and a time management unit; the ID identification unit and the time management unit are respectively connected with the ARM chip; the ID identification unit is provided with an ID number special for each intelligent electric meter, and the ID number is used for identifying when data interaction is realized with an external intelligent host, so that data identification errors of the intelligent electric meter equipment by the external intelligent host are prevented.
The electric quantity acquisition module is provided with a pulse indicator lamp and a meter calibration terminal, the pulse indicator lamp is connected with a data terminal of the electric quantity acquisition module, and the meter calibration terminal is connected with a pulse output end of the electric quantity acquisition module.
The RS485 communication circuit adopts a BC184 type RS485 chip; the ARM chip is an ARM9 chip.
The utility model discloses a theory of operation:
the electric quantity collection module processes the collected alternating current and voltage signals and converts the alternating current and voltage signals into digital signals to perform operation inside, the operation result is transmitted to the ARM processor unit through the SPI interface by pulse signals, and the ARM processor unit processes the pulse signals transmitted by the electric quantity collection module and transmits the pulse signals to an external terminal according to the RS485 communication circuit. In the running process of the electric meter, the ARM processor unit monitors the current, the voltage, the power and the temperature of the cable in real time, the time management unit records the electricity utilization safety state (whether the current/the voltage/the power/the temperature of the cable is excessive) of the equipment, and the data are processed and then transmitted to an external intelligent host through the RS485 communication circuit.
The temperature acquisition module thermistor temperature probe acquires the temperature of the cable and transmits a voltage analog signal form to the ARM processor unit, and the ARM processor unit carries out A/D conversion on the voltage analog signal to a digital signal and judges whether the temperature of the cable exceeds a rated value.
And if the rated value is exceeded, controlling the relay protection circuit to execute power-off protection.
The same or similar reference numerals correspond to the same or similar parts;
the positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent;
it is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. An ammeter based on RS485 data routing sharing is characterized by comprising an RS485 communication circuit, a temperature acquisition module, an electric quantity acquisition module, an ARM processor unit, a magnetic latching relay and a bidirectional drive circuit; the magnetic latching relay is connected to the ARM processor unit through the bidirectional drive circuit; and the RS485 communication circuit, the temperature acquisition module and the electric quantity acquisition module are respectively connected with the ARM processor unit.
2. The RS485 data routing sharing based electric meter according to claim 1, wherein the electric quantity collection module comprises an AC voltage sampling sub-circuit, and the AC voltage sampling sub-circuit comprises a three-phase metering chip and a voltage transformer which are connected in sequence.
3. The RS485 data routing sharing based electric meter according to claim 2, wherein the electric quantity collection module further comprises an AC current sampling sub-circuit, and the AC current sampling sub-circuit comprises a three-phase metering chip and a current transformer which are connected in sequence.
4. The RS485 data routing sharing based electric meter according to claim 3, wherein the temperature collection module comprises a sampling resistor and a thermistor temperature probe, and the sampling resistor and the thermistor temperature probe form a series voltage division circuit.
5. The RS485 data routing sharing based electricity meter according to claim 4, wherein the resistance value of the sampling resistor is 5-10k Ω; the resistance of the thermistor temperature probe decreases as the cable temperature increases.
6. The RS485 data routing sharing based electricity meter according to claim 5, wherein the ARM processor unit comprises an ARM chip, an ID recognition unit, a time management unit; the ID identification unit and the time management unit are respectively connected with the ARM chip.
7. The RS485 data routing sharing based electric meter according to claim 6, wherein the ID identification unit is provided with an ID number which is specific to each intelligent electric meter, the ID number is used for identification when data interaction is realized with an external intelligent host, and data identification errors of the intelligent electric meter device by the external intelligent host are prevented.
8. The RS485 data routing sharing-based electric meter according to claim 7, wherein the electric quantity collection module is provided with a pulse indicator lamp and a meter calibration terminal, the pulse indicator lamp is connected with the data terminal of the electric quantity collection module, and the meter calibration terminal is connected with the pulse output terminal of the electric quantity collection module.
9. The RS485 data routing sharing based electric meter according to claim 8, wherein the RS485 communication circuit is a BC184 RS485 chip connected to any external intelligent host supporting RS485 communication protocol.
10. The RS485 data routing sharing based electricity meter according to any one of claims 1-9, wherein the ARM chip is an ARM9 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921982777.7U CN212159933U (en) | 2019-11-15 | 2019-11-15 | Ammeter based on RS485 data routing sharing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921982777.7U CN212159933U (en) | 2019-11-15 | 2019-11-15 | Ammeter based on RS485 data routing sharing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212159933U true CN212159933U (en) | 2020-12-15 |
Family
ID=73704418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921982777.7U Active CN212159933U (en) | 2019-11-15 | 2019-11-15 | Ammeter based on RS485 data routing sharing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212159933U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110824246A (en) * | 2019-11-15 | 2020-02-21 | 广东电网有限责任公司 | Ammeter based on RS485 data routing sharing |
-
2019
- 2019-11-15 CN CN201921982777.7U patent/CN212159933U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110824246A (en) * | 2019-11-15 | 2020-02-21 | 广东电网有限责任公司 | Ammeter based on RS485 data routing sharing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100557731C (en) | A kind of electronic mutual inductor with anti-stealing electricity function | |
| CN205070069U (en) | Intelligent socket | |
| CN108226595B (en) | Portable electronic intelligent electric energy meter anti-electricity-theft detector | |
| CN111422091A (en) | Alternating-current charging stake control guidance function detecting system | |
| CN103901269A (en) | Electric quantity measuring device facilitating switching of wiring mode | |
| CN204597127U (en) | Close-coupled socket | |
| CN212159933U (en) | Ammeter based on RS485 data routing sharing | |
| CN215772636U (en) | Intelligent drop-out fuse with primary and secondary deep fusion | |
| CN112615213A (en) | Intelligent socket | |
| CN215730024U (en) | Electronic type three-phase remote charge control built-in intelligent electric energy meter | |
| CN202393824U (en) | Arrester signal acquisition device for protecting series compensation capacitor | |
| CN111596128B (en) | Single-phase intelligent electric energy meter for UPS power supply monitoring | |
| CN110824246A (en) | Ammeter based on RS485 data routing sharing | |
| CN211402664U (en) | Alternating current flees into direct current system fault detection appearance | |
| CN210895798U (en) | Pre-payment guide rail meter based on NB-IOT | |
| CN2575882Y (en) | Device for climbing pole of 35 kV single-pole cable | |
| CN209946050U (en) | Crude oil water content tester for distillation method | |
| CN210720552U (en) | Integrated small current acquisition system | |
| CN109884575A (en) | A kind of single-phase electrical appliance research and application system | |
| CN205157660U (en) | Monitoring device | |
| CN110988460A (en) | Be applied to two core smart electric meters of marketing and distribution integration | |
| CN220154541U (en) | Intelligent guide rail ammeter based on 485+ Bluetooth communication | |
| CN211856731U (en) | External CT measuring module with input and output | |
| CN219322065U (en) | Residual current circuit breaker | |
| CN110632373A (en) | Integrated intelligent low-voltage line monitoring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |