CN105183070A - Intelligent meter 485 port voltage stabilizing device and work method thereof - Google Patents
Intelligent meter 485 port voltage stabilizing device and work method thereof Download PDFInfo
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Abstract
The invention relates to an intelligent meter 485 port voltage stabilizing device and a work method thereof. The device comprises a first voltage stabilizing module, a first 485 signal conversion chip, a second 485 signal conversion chip and a second voltage stabilizing module which are sequentially connected. The intelligent meter 485 port voltage stabilizing device can effectively solve the problem that the voltage of an intelligent meter 485 port is unstable, maintenance content is reduced, work efficiency of field debugging and maintenance staff is improved, operation cost of power supply enterprises is reduced, and the device is simple, practical and convenient to install.
Description
Technical field:
The present invention relates to a kind of intelligent meter 485 port stable-pressure device and method of work thereof, belong to the technical field of intelligent meter communication and control.
Background technology:
Intelligent meter was developing rapidly in recent years, but because production quantity is huge, the occupation rate of issue table meter is relatively high, 485 port voltage fluctuations are larger, voltage levels differs, and so just causes intelligent meter to be installed separately, different model table meter all cannot normal acquisition data when loading in mixture.Still main to increase collecting device in the current use procedure of intelligent meter, improve the validity of data acquisition, but this method not only increases production cost, reduce company's benefit, cause the wasting of resources, and cause data cannot normal acquisition, directly affect power supply enterprise to platform district, management unit's administrative situation, the monitoring of the actions such as platform district line loss, causes difficult management.
Chinese patent CN203931142U discloses the collection inquiry display unit that a kind of Household water electrically shows information, this device adopts the network communications technology and the embedded technologys such as broadband power line communication, by ammeter, water meter, gas meter information by gather the RS485 mouth of front end each ammeter data read back gather after the direct inquiry display terminal being delivered to family by broadband power line, the transmission mode such as wireless, such community resident is in just conveniently can inquire about ammeter, water meter, gas meter information, thus obtain the service condition of resource, better make arrangements for the daily life.This device is that RS485 mouth is directly accessed transmission line, and accuracy and stability are all lower.
Summary of the invention:
For the deficiencies in the prior art, the invention provides a kind of intelligent meter 485 port stable-pressure device, to solve because intelligent meter 485 port voltage is unstable, the inconsistent problem causing collecting device effectively to gather of all kinds of intelligent meter 485 port voltage, so as to improving management level and the economic benefit of electric company.
The invention still further relates to a kind of method of work of above-mentioned intelligent meter 485 port stable-pressure device.
Technical scheme of the present invention is as follows:
A kind of intelligent meter 485 port stable-pressure device, comprises the first Voltage stabilizing module, the one 485 signal conversion chip, the 2 485 signal conversion chip and the second Voltage stabilizing module that connect successively.
Preferably, described one 485 signal conversion chip is a VP3082 chip, a MAX485 interface chip or a SN75176 chip; Described 2 485 signal conversion chip is the 2nd VP3082 chip, the 2nd MAX485 interface chip or the 2nd SN75176 chip.
Preferred further, 1,4 ports of a described VP3082 chip are connected with 4,1 port of the 2nd VP3082 chip respectively.
Preferably, described first Voltage stabilizing module and the second modular circuit are connected to power module; Described power module comprises voltage dependent resistor (VDR), thermistor ptc1, transformer, rectifier bridge, stabilivolt and multiple electric capacity; Described multiple electric capacity comprise electric capacity CD1, electric capacity CD2, electric capacity C1 and electric capacity C2; One end of voltage dependent resistor (VDR) is connected with the mobile terminal of thermistor ptc1, two stiff ends of thermistor ptc1 are connected with the input port of transformer respectively, transformer output port is connected with the input port of rectifier bridge, and the output port of rectifier bridge and electric capacity CD1 and electric capacity C1 are connected in parallel; Electric capacity C1 connects 2,3 ports of stabilivolt; 1,2 ports of stabilivolt are connected with the two ends of electric capacity CD2, electric capacity C2 respectively; The two ends of electric capacity C2 are power module outlet mouth, and described voltage dependent resistor (VDR) two ends are power module input port.Described power module provides the voltage of stable output for the first Voltage stabilizing module and the second Voltage stabilizing module.
Preferably, described intelligent meter 485 port stable-pressure device also comprises control module; Described control module is connected with the control port of the one 485 signal conversion chip and the 2 485 signal conversion chip respectively.
Preferred further, described control module comprises electric capacity C11, triode Q1 and two parallel resistance; The collector of triode Q1 is connected to one end of two parallel resistances, and the other end of described two parallel resistances connects the two ends of electric capacity C11 respectively; The base stage of triode Q1 is connected with the transmit port of the one 485 signal conversion chip respectively by resistance R5 with R7 with emitter, and the collector of triode Q1 is connected with the control port of the one 485 signal conversion chip and the 2 485 signal conversion chip respectively.
Preferred further, described control module is provided with indicator light circuit; Indicator light circuit is connected with the transmit port of the one 485 signal conversion chip and the 2 485 signal conversion chip, receiving port respectively.Indicator light circuit is totally two LED displays, and during described intelligent meter 485 port stable-pressure device energising, the display of power supply indication LED is luminous, has data to send out another LED of time receiving and show luminous between two 485 signal conversion chips.
Preferably, described Voltage stabilizing module comprises thermistor ptc2, transient supression diode, triode CR1, triode CR2, electric capacity C4, electric capacity C5, pull down resistor R11 and pull-up resistor R12; One end of described transient supression diode and thermistor ptc2 is respectively A1, B1 port of described Voltage stabilizing module; As 7 ports of described Voltage stabilizing module after transient supression diode is connected with one end of pull down resistor R11, the collector of triode CR1 respectively with the other end of thermistor ptc2; The other end of pull down resistor R11 is connected by the collector of electric capacity with triode CR1; The other end of pull down resistor R11 is also connected with the collector of triode CR1; One end of pull-up resistor R12 connects described A1 port, and one end of pull-up resistor R12 is connected with one end of the emitter of triode CR2, electric capacity C5; The collector access A1 port of triode CR2; The base stage of triode CR2 and the other end of electric capacity C5 all access GND; Described GND is as 5 ports of described Voltage stabilizing module; A1,7 ports of described Voltage stabilizing module are connected with the data bus port of the one 485 signal conversion chip, the 2 485 signal conversion chip respectively.Voltage stabilizing module utilizes the pull-up of pull-up resistor R12, pull down resistor R11, drop-down effect obtains stable level, utilizes the pressure stabilization function of triode simultaneously, obtains more stable level.
It is as follows that a kind of method of work of above-mentioned intelligent meter 485 port stable-pressure device comprises step:
1) signal of A1, B1 port accepts intelligent meter 485 port of the first Voltage stabilizing module;
2) signal described in thermistor ptc2, transient supression diode pair carries out voltage stabilizing and filtering deformity signal; Obtain stable TTL high level by pull-up resistor R12, utilize pull down resistor R11 to obtain stable TTL low level;
3) by triode CR1, the further voltage stabilizing of triode CR2, by step 2) the TTL low level that exports is sent to the VCC port of the one 485 signal conversion chip, and described TTL low level is changed into 485 low levels by the one 485 signal conversion chip;
4) 485 low levels are changed into level at the bottom of TTL by the 2 485 signal conversion chip, are sent to 485 buses by the second Voltage stabilizing module.
Preferably, the method for work of described intelligent meter 485 port stable-pressure device also comprises the step of pilot lamp instruction, has data to send out two LED corresponding to time receiving luminous respectively between described intelligent meter 485 port stable-pressure device energising and two chips.
Preferably, the method for work of described intelligent meter 485 port stable-pressure device also comprises the step that control module controls; Control module controls the transmitting-receiving of a VP3082 chip and the 2nd VP3082 chip data; The concrete grammar that control module controls is, control circuit receives 485 level signals that the one 485 signal conversion chip transmit port sends, and exports high level signal or low level signal; When output low level signal, trigger the control port of the one 485 signal conversion chip and the 2 485 signal conversion chip, realize transmission and the reception of signal between the one 485 signal conversion chip transmit port and the 2 485 signal conversion chip receiving port.When control circuit exports high level signal, there is no action; The undesired signal between the one 485 signal conversion chip and the 2 485 signal conversion chip can be filtered by the control of control circuit, improve data transmit-receive efficiency.
485 level signals that control circuit is sent by the one 485 signal conversion chip 4 port, trigger triode Q1 whether conducting, export high level signal when triode ON, trigger 3 ports of the one 485 signal conversion chip and 3 ports of the 2 485 signal conversion chip; Output low level signal when triode not conducting, trigger 2 ports of the one 485 signal conversion chip and 2 ports of the 2 485 signal conversion chip, realize transmission and the reception of signal between the one 485 signal conversion chip 4 port and the 2 485 signal conversion chip 1 port.The undesired signal between the one 485 signal conversion chip and the 2 485 signal conversion chip can be filtered by the control of control circuit, improve data transmit-receive efficiency.
Advantage of the present invention is:
1, intelligent meter 485 port stable-pressure device of the present invention, the effective problem solving intelligent meter 485 port voltage instability, reduces maintenance content, improves the work efficiency of field adjustable maintainer, reduces the operating cost of power supply enterprise; Simple and practical, be convenient to install.
Accompanying drawing illustrates:
Fig. 1 is the connection diagram of intelligent meter 485 port stable-pressure device of the present invention and intelligent meter;
Fig. 2 is the model calling schematic diagram of intelligent meter 485 port stable-pressure device of the present invention;
Fig. 3 is the electrical block diagram of power module of the present invention;
Fig. 4 is the electrical block diagram of control module of the present invention;
Fig. 5 is the electrical block diagram of indicator light circuit described in embodiment 6;
Fig. 6 is the electrical block diagram of Voltage stabilizing module of the present invention;
Embodiment:
Described voltage dependent resistor (VDR) model is S20K625; Rectifier bridge is MB6S; Stabilivolt is E78E.
Below in conjunction with embodiment and Figure of description, invention is described in detail, but is not limited thereto.
As schemed shown in 1-6.
Embodiment 1,
A kind of intelligent meter 485 port stable-pressure device, its difference is, comprises the first Voltage stabilizing module, a VP3082 chip, the 2nd VP3082 chip and the second Voltage stabilizing module that connect successively.
Embodiment 2,
Intelligent meter 485 port stable-pressure device as described in Example 1, its difference is, 1,4 ports of a described VP3082 chip are connected with 4,1 port of the 2nd VP3082 chip respectively.
Embodiment 3,
Intelligent meter 485 port stable-pressure device as described in Example 1, its difference is, described first Voltage stabilizing module and the second Voltage stabilizing module are connected to power module.Described power module comprises voltage dependent resistor (VDR), thermistor ptc1, transformer, rectifier bridge, stabilivolt and multiple electric capacity; Described multiple electric capacity comprise electric capacity CD1, electric capacity CD2, electric capacity C1 and electric capacity C2; One end of voltage dependent resistor (VDR) is connected with the mobile terminal of thermistor ptc1, two stiff ends of thermistor ptc1 are connected with the input port of transformer respectively, transformer output port is connected with the input port of rectifier bridge, and the output port of rectifier bridge is connected with the electric capacity C1 of electric capacity CD1 and 104F of 470UF; The electric capacity C1 of 104F connects 2,3 ports of stabilivolt; 1,2 ports of stabilivolt are connected with the two ends of electric capacity CD2,104F electric capacity C2 of 20UF respectively; The two ends of electric capacity C2 are power module outlet mouth, and described voltage dependent resistor (VDR) two ends are power module input port; Described input port connects 220V AC power; 1 port of described stabilivolt is VCC end.Described power module provides the voltage of stable output for the first Voltage stabilizing module and the second Voltage stabilizing module.
Embodiment 4,
Intelligent meter 485 port stable-pressure device as described in Example 1, its difference is, described intelligent meter 485 port stable-pressure device also comprises control module; Described control module is connected with the control port (i.e. 2 ports and 3 ports) of a VP3082 chip and the 2nd VP3082 chip respectively.
Embodiment 5,
Intelligent meter 485 port stable-pressure device as described in Example 4, its difference is, described control module comprises 104F electric capacity C11, triode Q1 and two parallel resistance; The collector of triode Q1 is connected to one end (R1=101 Ω, R9=103 Ω) of two parallel resistance R1 and R9, and the other end of described two parallel resistances connects the two ends of electric capacity C11 respectively; The base stage of triode Q1 is connected with 4 ports of a VP3082l chip with the resistance R7 of 103 Ω respectively by the resistance R5 of 122 Ω with emitter, and the collector of triode Q1 is connected with 3 ports of a VP3082 chip and the 2nd VP3082 chip and 2 ports respectively.
Embodiment 6,
Intelligent meter 485 port stable-pressure device as described in Example 4, its difference is, described control module is provided with indicator light circuit; Indicator light circuit is connected with 1 port of a VP3082l chip and the 2nd VP3082l chip, 4 ports respectively.Indicator light circuit is totally two LED displays, and wherein LED2 is power supply instruction, and described intelligent meter 485 port stable-pressure device energising is namely luminous, and LED1 for having data to send out time receiving luminescence between two 485 signal conversion chips.
Embodiment 7,
Intelligent meter 485 port stable-pressure device as described in Example 1, its difference is, described Voltage stabilizing module comprises thermistor ptc2, transient supression diode, triode CR1, the electric capacity C5 of electric capacity C4,104F of triode CR2,104F, the pull-up resistor R12 of the pull down resistor R11 of 183 Ω and 183 Ω; One end of described transient supression diode and thermistor ptc2 is respectively A1, B1 port of described Voltage stabilizing module; As 7 ports of described Voltage stabilizing module after transient supression diode is connected with one end of pull down resistor R11, the collector of triode CR1 respectively with the other end of thermistor ptc2; The other end of pull down resistor R11 connects the emitter of triode CR1 by electric capacity; The other end of pull down resistor R11 is also connected with the collector of triode CR1; One end of pull-up resistor R12 connects described A1 port, and one end of pull-up resistor R12 is connected with one end of the emitter of triode CR2, electric capacity C5; The collector access A1 port of triode CR2; The base stage of triode CR2 and the other end of electric capacity C5 all access GND; Described GND is as 5 ports of described Voltage stabilizing module; A1,7 ports of described Voltage stabilizing module are connected with the data bus port (A, B port) of a VP3082 chip, the 2nd VP3082 chip respectively.Voltage stabilizing module utilizes the pull-up of pull-up resistor R12, pull down resistor R11, drop-down effect obtains stable level, utilizes the pressure stabilization function of triode simultaneously, obtains more stable level.
Embodiment 8,
It is as follows that the method for work of intelligent meter 485 port stable-pressure device as described in Example 7 comprises step:
1) signal of A1, B1 port accepts intelligent meter 485 port of the first Voltage stabilizing module;
2) signal described in thermistor ptc2, transient supression diode pair carries out voltage stabilizing and filtering deformity signal; Obtain stable TTL high level by pull-up resistor R12, utilize pull down resistor R11 to obtain stable TTL low level;
3) by triode CR1, the further voltage stabilizing of triode CR2, by step 2) the TTL low level that exports is sent to the VCC port of the one 485 signal conversion chip, and described TTL low level is changed into 485 low levels by the one 485 signal conversion chip;
4) 485 low levels are changed into level at the bottom of TTL by the 2 485 signal conversion chip, are sent to 485 buses by the second Voltage stabilizing module.
Embodiment 9,
The method of work of intelligent meter 485 port stable-pressure device as described in Example 8, its difference is, also comprise the step of pilot lamp instruction, between the energising of described intelligent meter 485 port stable-pressure device and two chips, have data to send out two LED corresponding to time receiving luminous respectively.
Embodiment 10,
The method of work of intelligent meter 485 port stable-pressure device as described in Example 8, its difference is, the method for work of described intelligent meter 485 port stable-pressure device also comprises the step of control module control; Control module controls the transmitting-receiving of a VP3082 chip and the 2nd VP3082 chip data; The concrete grammar that control module controls is, control circuit receives 485 level signals that the one 485 signal conversion chip transmit port sends, and exports high level signal or low level signal; When output low level signal, trigger the control port of the one 485 signal conversion chip and the 2 485 signal conversion chip, realize transmission and the reception of signal between the one 485 signal conversion chip transmit port and the 2 485 signal conversion chip receiving port.The undesired signal between the one 485 signal conversion chip and the 2 485 signal conversion chip can be filtered by the control of control circuit, improve data transmit-receive efficiency.
Claims (10)
1. an intelligent meter 485 port stable-pressure device, is characterized in that, comprises the first Voltage stabilizing module, the one 485 signal conversion chip, the 2 485 signal conversion chip and the second Voltage stabilizing module that connect successively.
2. intelligent meter 485 port stable-pressure device as claimed in claim 1, it is characterized in that, described one 485 signal conversion chip is a VP3082 chip, a MAX485 interface chip or a SN75176 chip; Described 2 485 signal conversion chip is the 2nd VP3082 chip, the 2nd MAX485 interface chip or the 2nd SN75176 chip.
3. intelligent meter 485 port stable-pressure device as claimed in claim 2, it is characterized in that, 1,4 ports of a described VP3082 chip are connected with 4,1 port of the 2nd VP3082 chip respectively.
4. intelligent meter 485 port stable-pressure device as claimed in claim 1, it is characterized in that, described first Voltage stabilizing module and the second Voltage stabilizing module are connected to power module; Described power module comprises voltage dependent resistor (VDR), thermistor ptc1, transformer, rectifier bridge, stabilivolt and multiple electric capacity; Described multiple electric capacity comprise electric capacity CD1, electric capacity CD2, electric capacity C1 and electric capacity C2; One end of voltage dependent resistor (VDR) is connected with the mobile terminal of thermistor ptc1, two stiff ends of thermistor ptc1 are connected with the input port of transformer respectively, transformer output port is connected with the input port of rectifier bridge, the output port of rectifier bridge and being connected in parallel of electric capacity CD1 and C1; Electric capacity C1 connects 2,3 ports of stabilivolt; 1,2 ports of stabilivolt are connected with the two ends of electric capacity CD2, electric capacity C2 respectively; The two ends of electric capacity C2 are power module outlet mouth, and described voltage dependent resistor (VDR) two ends are power module input port.
5. intelligent meter 485 port stable-pressure device as claimed in claim 1, it is characterized in that, described intelligent meter 485 port stable-pressure device also comprises control module; Described control module is connected with the control port of the one 485 signal conversion chip and the 2 485 signal conversion chip respectively.
6. intelligent meter 485 port stable-pressure device as claimed in claim 5, it is characterized in that, described control module comprises electric capacity C11, triode Q1 and two parallel resistance; The collector of triode Q1 is connected to one end of two parallel resistances, and the other end of described two parallel resistances connects the two ends of electric capacity C11 respectively; The base stage of triode Q1 is connected with the transmit port of the one 485 signal conversion chip respectively by resistance R5 with R7 with emitter, and the collector of triode Q1 is connected with the control port of the one 485 signal conversion chip and the 2 485 signal conversion chip respectively.
7. intelligent meter 485 port stable-pressure device as claimed in claim 5, is characterized in that, described control module is provided with indicator light circuit; Indicator light circuit is connected with the transmit port of the one 485 signal conversion chip and the 2 485 signal conversion chip, receiving port respectively.
8. intelligent meter 485 port stable-pressure device as claimed in claim 1, it is characterized in that, described Voltage stabilizing module comprises thermistor ptc2, transient supression diode, triode CR1, triode CR2, electric capacity C4, electric capacity C5, pull down resistor R11 and pull-up resistor R12; One end of described transient supression diode and thermistor ptc2 is respectively A1, B1 port of described Voltage stabilizing module; As 7 ports of described Voltage stabilizing module after transient supression diode is connected with one end of pull down resistor R11, the collector of triode CR1 respectively with the other end of thermistor ptc2; The other end of pull down resistor R11 is connected by the collector of electric capacity with triode CR1; The other end of pull down resistor R11 is also connected with the collector of triode CR1; One end of pull-up resistor R12 connects described A1 port, and one end of pull-up resistor R12 is connected with one end of the emitter of triode CR2, electric capacity C5; The collector access A1 port of triode CR2; The base stage of triode CR2 and the other end of electric capacity C5 all access GND; Described GND is as 5 ports of described Voltage stabilizing module; A1,7 ports of described Voltage stabilizing module are connected with the data bus port of the one 485 signal conversion chip, the 2 485 signal conversion chip respectively.
9. a method of work for intelligent meter 485 port stable-pressure device as claimed in claim 8, is characterized in that, comprise step as follows:
1) signal of A1, B1 port accepts intelligent meter 485 port of the first Voltage stabilizing module;
2) signal described in thermistor ptc2, transient supression diode pair carries out voltage stabilizing and filtering deformity signal; Obtain stable TTL high level by pull-up resistor R12, utilize pull down resistor R11 to obtain stable TTL low level;
3) by triode CR1, the further voltage stabilizing of triode CR2, by step 2) the TTL low level that exports is sent to the VCC port of the one 485 signal conversion chip, and described TTL low level is changed into 485 low levels by the one 485 signal conversion chip;
4) 485 low levels are changed into level at the bottom of TTL by the 2 485 signal conversion chip, are sent to 485 buses by the second Voltage stabilizing module.
10. the method for work of intelligent meter 485 port stable-pressure device as claimed in claim 9, is characterized in that, the method for work of described intelligent meter 485 port stable-pressure device also comprises the step of control module control; Control module controls the transmitting-receiving of a VP3082 chip and the 2nd VP3082 chip data; The concrete grammar that control module controls is, control circuit receives 485 level signals that the one 485 signal conversion chip transmit port sends, and exports high level signal or low level signal; When output low level signal, trigger the control port of the one 485 signal conversion chip and the 2 485 signal conversion chip, realize transmission and the reception of signal between the one 485 signal conversion chip transmit port and the 2 485 signal conversion chip receiving port.
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| CN201510624154.2A CN105183070B (en) | 2015-09-25 | 2015-09-25 | Intelligent meter 485 port voltage stabilizing device and work method thereof |
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| CN201510624154.2A CN105183070B (en) | 2015-09-25 | 2015-09-25 | Intelligent meter 485 port voltage stabilizing device and work method thereof |
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