CN206269875U - A kind of flow accumulation device - Google Patents
A kind of flow accumulation device Download PDFInfo
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- CN206269875U CN206269875U CN201621372649.7U CN201621372649U CN206269875U CN 206269875 U CN206269875 U CN 206269875U CN 201621372649 U CN201621372649 U CN 201621372649U CN 206269875 U CN206269875 U CN 206269875U
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Abstract
The utility model discloses a kind of flow accumulation device, including main control module, pulse signal acquisition module, temperature sensor module, pressure sensor module, clock circuit, data storage circuitry, LCD MODULE, data remote transmitting module, data acquisition self diagnosis module, temperature sensor module includes temperature detecting unit, signal amplification unit；Pressure sensor module includes three end tabilized current power supplies, bridge balance formula absolute pressure sensor, differential amplifier circuit；Data remote transmitting module includes 485 communication units, CAN interface unit, 4 20mA signal elements, increased temperature and pressure compensation, data remote, power-failure memory and fault data self-diagnostic function, ensure the accurate metering of flow measurement, improve reliability, authority, the confidence level of data.
Description
Technical field
The utility model is applied to field, especially one such as trade settlement and cost accounting, the supervision and check of energy source efficiency
Plant flow accumulation device.
Background technology
Energy measurement is generally made up of differential pressure detecting element, transmitter, a flow integrator；Flow integrator is responsible for adopting
Collect flow, the temperature and pressure signal of transducing unit, computing is compensated to single flow signal, operation result is passed through
485 communication modes are sent to host computer terminal, then are transferred to collecting computer by correlation module collection, carry out unifying pipe
Reason.
1st, flow integrator lacks temperature and pressure self-diagnosis of trouble and temperature and pressure remote transmission function.
Flow integrator is public through flow rate calculation according to the output current of differential pressure transmitter and the pressure, the temperature that detect
Formula calculates outflow, and whether its perfect in shape and function directly determines metering accuracy.Because the flow of fluid has directly with its density
Relation, and density changes with the change of the temperature, pressure of fluid, the effect of temperature pressure compensation is the close of amendment fluid
Degree, makes measurement data closer to the actual value of data.Current flow integrator has incomplete place, especially works as temperature
When degree, pressure signal occur abnormal, its error message influences very big on flow measurement result, easily causes larger metering and misses
Difference, if finding to solve not in time, can just cause the distortion of continuous data.
On-site data gathering uses serial transmission and only transmits flow signal, cannot be supervised in computer acquisition system
Control each flow point temperature, the change of pressure.
2nd, flow integrator has the defect that power down is not remembered.
Flow integrator cannot record power down time, can promote the generation of cheating, generally there is two kinds of situations：A kind of feelings
Condition is that flow integrator has a power failure, accordingly even when differential pressure detecting element, a transmitter are working properly, no matter the actual energy disappears
Consumption is how many, is embodied on flow integrator, and the metric results having a power failure this period are exactly zero；Another situation, though be exactly
Right flow integrator does not have a power failure, but the flow signal line from transmitter is pulled down from flow integrator, flow integrator inspection
Flow instrument (we term it " zero-signal ") is not detected, the metric results of this period are similarly zero.Both of which can
Flow measurement data misalignment is caused, is that cost accounting brings greatly interference.
3rd, integrating instrument lacks collection fault self-diagnosis function.
The data collecting system for currently using is communicated using master-slave mode.It is each according to live actual distribution situation
Individual acquisition terminal is responsible for gathering the instantaneous delivery and integrated flow of several flow integrators.When flow integrator accesses collection system
After system, whether normal communicate, it is necessary to checked from acquisition terminal, and the acquisition terminal at scene and flow integrator often at a distance of compared with
Far, very big inconvenience is brought to maintenance work.
Utility model content
The purpose of this utility model is to provide a kind of flow accumulation device, including main control module, pulse signal acquisition module,
Temperature sensor module, pressure sensor module, clock circuit, data storage circuitry, LCD MODULE, data remote mould
Block, data acquisition self diagnosis module,
Temperature sensor module includes temperature detecting unit, signal amplification unit, and temperature detecting unit uses temperature-sensing element
Gather fluid temperature signal as temperature sensor, temperature-sensing element working end and free end respectively with the input of signal amplification unit
End connection, the output end of signal amplification unit is connected with temperature input of main control module；
Pressure sensor module includes three end tabilized current power supplies, bridge balance formula absolute pressure sensor, differential amplifier circuit, three
The output end of tabilized current power supply is held to be connected with an input of bridge balance formula absolute pressure sensor, another input end grounding,
Two output ends of three end tabilized current power supplies are connected with the input of differential amplifier circuit respectively, the output end of differential amplifier circuit
It is connected with pressure input of main control module；
Data remote transmitting module includes 485 communication units, CAN interface unit, 4-20mA signal elements, 485 communication units
The control end of unit is connected with the serial ports of main control module, and the sending and receiving end of 485 communication units is connected with the sending and receiving end of host computer；CAN is total
The sending and receiving end of line interface unit is connected with the data-interface of main control module, and input and the main control module of 4-20mA signal elements connect
Connect, the output end of 4-20mA signal elements is connected with equipment control end.
Further, temperature sensor module use nickel chromium triangle-nickel chromium triangle K-type thermocouple measurement fluid temperature (F.T.), output end TC+ with
Resistance R7, resistance R3 are connected, and resistance R7 be connected with resistance R6, resistance R8, resistance R9, resistance R10, electric capacity C1, resistance R9 and are transported
The positive input terminal connection put, output end TC- is connected with resistance R1, resistance R2, and resistance R2 is connected with resistance R3, rheostat W1, becomes
Resistance device W1 is connected with resistance R5, resistance R8, and resistance R8 is connected with the negative input end of amplifier, output end and resistance R11, the change of amplifier
Resistance device W2 connections, rheostat W2 is connected with one end of resistance R14, and the other end of resistance R14 is connected with main control module.
Further, the R ends of three end tabilized current power supply LM34 are connected with one end of resistance R1A, one end of resistance R2A, and three
The U- ends of tabilized current power supply LM34 are held to be connected with the other end of resistance R1A, the anode of diode D1, negative electrode and the electricity of diode D1
The other end connection of R2A is hindered, the negative electrode of diode D1 is connected with the U+ ends of bridge balance formula absolute pressure sensor, and bridge balance formula is exhausted
The U- ends ground connection of pressure sensor a, output end of bridge balance formula absolute pressure sensor is connected with the positive input terminal of amplifier U2A, electricity
Another output end of bridge balanced type absolute pressure sensor is connected with the positive output end of amplifier U1C, negative input end and the electricity of amplifier U2A
Resistance R3A, rheostat W3 connections, the negative input end of amplifier U1C is connected with resistance R4A, rheostat W3, the output end of amplifier U2A and
Resistance R5A, resistance R3A are connected, and the output end of amplifier U1C is connected with resistance R6A, resistance R4A, the positive input terminal of amplifier U1B and
Resistance R5A, resistance R7A are connected, and the other end ground connection of resistance R7A, negative input end and resistance R6A, the rheostat W4 of amplifier U1B connect
Connect, the output end of amplifier U1B is connected with rheostat W4, the output end of amplifier U1B and the AD conversion unit input of main control module
Connection.
Further, the pin 1 of 485 communication chip U6, pin 4 are connected with the input and output control end of main control module, draw
Pin 6, pin 7 are connected with the output end of host computer respectively；The pin 1 of 4-20mA electric current pio chips U9 is connected with main control module,
The pin 4 of 4-20mA electric current pio chips U9 is connected with field instrument control end；The pin 1 of CAN interface chip, pin 4
It is connected with the input and output pin of main control module, the input and output pin of the bus transceiving chip of pin 6, pin 7 and host computer
Connection.
The beneficial effects of the utility model are,
1st, temperature, pressure anomaly arbitration functions are increased in instrument.Once temperature or appearance of abnormal pressure, then instrument is automatic
It is switched in design work temperature or operating pressure, compensating computing with this temperature or pressure can greatly reduce flow measurement
Error, makes measurement data closer to the actual value of data.
2nd, in the data transmission procedure of instrument, temperature and pressure transfer function is increased, the temperature and pressure at scene
Signal is sent in host computer and field instrument by teletransmission data-interface, is easy to watch existing in time by host computer
The temperature and pressure signal of field, is conducive to the reasonable utilization and management and running of the energy.
3rd, in instrument increase power-failure memory and zero-signal memory function, flow integrator record in time power off time point,
Electric power feeding time point, zero-signal time point, formed it is detailed stop power transmission and zero-signal record, so can effectively prevent metering cheating existing
The generation of elephant, reduces metering objection.
4th, two luminous indicating lamps are increased on the front panel of instrument, respectively RXD codan lamps and TXD sends and indicate
Lamp, quickly can effectively judge data acquisition failure, effectively reduce the intensity of maintenance work, improve operating efficiency.
Brief description of the drawings
Fig. 1 is the utility model structural representation；
Fig. 2 is temperature sensor module circuit theory diagrams；
Fig. 3 is pressure sensor moding circuit schematic diagram；
Fig. 4 is 485 communication chip circuit theory diagrams；
Fig. 5 is 4-20mA electric current pio chip circuit theory diagrams；
Fig. 6 is CAN interface chip circuit schematic diagram.
Specific embodiment
As shown in figure 1, a kind of flow accumulation device, including main control module, pulse signal acquisition module, temperature sensor mould
Block, pressure sensor module, clock circuit, data storage circuitry, LCD MODULE, data remote transmitting module, data acquisition are certainly
Diagnostic module, temperature sensor module includes temperature detecting unit, signal amplification unit, and temperature detecting unit uses temperature-sensing element
Gather fluid temperature signal as temperature sensor, temperature-sensing element working end and free end respectively with the input of signal amplification unit
End connection, the output end of signal amplification unit is connected with temperature input of main control module；Pressure sensor module includes three
End tabilized current power supply, bridge balance formula absolute pressure sensor, differential amplifier circuit, output end and the electric bridge of three end tabilized current power supplies are put down
One input connection of weighing apparatus formula absolute pressure sensor, another input end grounding, two output ends point of three end tabilized current power supplies
It is not connected with the input of differential amplifier circuit, the output end of differential amplifier circuit is with pressure input of main control module even
Connect.
Data remote transmitting module includes 485 communication units, CAN interface unit, 4-20mA signal elements, 485 communication units
The control end of unit is connected with the serial ports of main control module, and the sending and receiving end of 485 communication units is connected with the sending and receiving end of host computer；CAN is total
The sending and receiving end of line interface unit is connected with the data-interface of main control module, and input and the main control module of 4-20mA signal elements connect
Connect, the output end of 4-20mA signal elements is connected with equipment control end.
Data acquisition self diagnosis module includes that RXD codan lamps and TXD send indicator lamp, RXD codan lamps and TXD
Indicator lamp is sent to be connected with main control module respectively.When having data transfer on data wire, RXD indicator lamps are bright, pointed out data wire
Connect, when TXD transmission indicator lamps are bright, represent there is data transfer on data wire, communication is completely normal.Referred to by two above
Show the instruction situation of lamp, it will be appreciated that the data transmission scenarios at scene.
As shown in Fig. 2 temperature sensor module uses nickel chromium triangle-nickel chromium triangle K-type thermocouple measurement fluid temperature (F.T.), output end TC+
Be connected with resistance R7, resistance R3, resistance R7 is connected with resistance R6, resistance R8, resistance R9, resistance R10, electric capacity C1, resistance R9 with
The positive input terminal connection of amplifier, output end TC- is connected with resistance R1, resistance R2, and resistance R2 is connected with resistance R3, rheostat W1,
Rheostat W1 is connected with resistance R5, resistance R8, and resistance R8 is connected with the negative input end of amplifier, the output end and resistance R11 of amplifier,
Rheostat W2 is connected, and rheostat W2 is connected with one end of resistance R14, and the other end of resistance R14 is connected with main control module.
With temperature-sensing element nickel chromium triangle-nickel chromium triangle K-type thermocouple as temperature sensor come collecting temperature signal, temperature signal is mV
Level, need to be by enhanced processing during actual measurement, and it is 100 that amplifier uses ICL7650, feedback network resistance ratio R11/R8, i.e. temperature
Degree millivolt voltage signal is exaggerated 100 times.Input temp voltage millivolt signal is TC+ poor with TC-terminal voltage, TC-end connection
Resistance R2 be a negative tempperature coefficient thermistor, when working end temperature change, the thermoelectrical potential that thermocouple is produced also will change, and
Now thermistor resistance will also be reduced and the voltage of TC-terminal voltage is also changed, so total differential input signal with
Temperature change is cancelled.If parameter selection can properly eliminate the influence that free end temperature change is measured electric thermo-couple temperature.CT
Take from and amplify later temperature-voltage signal, by changing R13 and the desirable appropriate voltage signal of R14 and W2 ratios and temperature value pair
Should, the voltage signal is connected to main control module input.
As shown in figure 3, the R ends of three end tabilized current power supply LM34 are connected with one end of resistance R1A, one end of resistance R2A, three
The U- ends of tabilized current power supply LM34 are held to be connected with the other end of resistance R1A, the anode of diode D1, negative electrode and the electricity of diode D1
The other end connection of R2A is hindered, the negative electrode of diode D1 is connected with the U+ ends of bridge balance formula absolute pressure sensor, and bridge balance formula is exhausted
The U- ends ground connection of pressure sensor a, output end of bridge balance formula absolute pressure sensor is connected with the positive input terminal of amplifier U2A, electricity
Another output end of bridge balanced type absolute pressure sensor is connected with the positive output end of amplifier U1C, negative input end and the electricity of amplifier U2A
Resistance R3A, rheostat W3 connections, the negative input end of amplifier U1C is connected with resistance R4A, rheostat W3, the output end of amplifier U2A and
Resistance R5A, resistance R3A are connected, and the output end of amplifier U1C is connected with resistance R6A, resistance R4A, the positive input terminal of amplifier U1B and
Resistance R5A, resistance R7A are connected, and the other end ground connection of resistance R7A, negative input end and resistance R6A, the rheostat W4 of amplifier U1B connect
Connect, the output end of amplifier U1B is connected with rheostat W4, the output end of amplifier U1B and the AD conversion unit input of main control module
Connection.Three end tabilized current power supply LM34 provide operating current for bridge balance formula absolute pressure sensor, and voltage signal is through differential amplification
It is connected with AD conversion unit in the piece of main control module afterwards.
As shown in figure 4, the pin 1 of 485 communication chip U6, pin 4 are connected with the input and output control end of main control module, draw
Pin 6, pin 7 are connected with the output end of host computer respectively.
As shown in figure 5, the pin 1 of 4-20mA electric current pio chips U9 is connected with main control module, 4-20mA electric currents output core
The pin 4 of piece U9 is connected with field instrument control end.
As shown in fig. 6, the pin 1 of CAN interface chip, pin 4 are connected with the input and output pin of main control module, draw
Pin 6, pin 7 are connected with the input and output pin of the bus transceiving chip of host computer.
It is not new to this practicality although above-mentioned be described with reference to accompanying drawing to specific embodiment of the present utility model
The limitation of type protection domain, one of ordinary skill in the art should be understood that on the basis of the technical solution of the utility model, ability
Various modifications or deform still in protection model of the present utility model that field technique personnel make by need not paying creative work
Within enclosing.
Claims (4)
1. a kind of flow accumulation device, it is characterised in that including main control module, pulse signal acquisition module, temperature sensor mould
Block, pressure sensor module, clock circuit, data storage circuitry, LCD MODULE, data remote transmitting module, data acquisition are certainly
Diagnostic module,
Temperature sensor module includes temperature detecting unit, signal amplification unit, and temperature detecting unit makees temperature using temperature-sensing element
Spend sensor to gather fluid temperature signal, temperature-sensing element working end and free end connect with the input of signal amplification unit respectively
Connect, the output end of signal amplification unit is connected with temperature input of main control module；
Pressure sensor module includes three end tabilized current power supplies, bridge balance formula absolute pressure sensor, differential amplifier circuit, and three ends can
The output end of constant-current source is adjusted to be connected with an input of bridge balance formula absolute pressure sensor, another input end grounding, three ends
Two output ends of tabilized current power supply are connected with the input of differential amplifier circuit respectively, the output end of differential amplifier circuit and master
Control the pressure input connection of module；
Data remote transmitting module includes 485 communication units, CAN interface unit, 4-20mA signal elements, 485 communication units
Control end is connected with the serial ports of main control module, and the sending and receiving end of 485 communication units is connected with the sending and receiving end of host computer；CAN connects
The mouth sending and receiving end of unit is connected with the data-interface of main control module, and the input of 4-20mA signal elements is connected with main control module,
The output end of 4-20mA signal elements is connected with equipment control end.
2. a kind of flow accumulation device as claimed in claim 1, it is characterised in that temperature sensor module uses nickel chromium triangle-nickel
Chromium K-type thermocouple measurement fluid temperature (F.T.), output end TC+ is connected with resistance R7, resistance R3, resistance R7 and resistance R6, resistance R8, electricity
Resistance R9, resistance R10, electric capacity C1 connections, resistance R9 are connected with the positive input terminal of amplifier, and output end TC- connects with resistance R1, resistance R2
Connect, resistance R2 is connected with resistance R3, rheostat W1, rheostat W1 is connected with resistance R5, resistance R8, and resistance R8 is negative defeated with amplifier
Enter end connection, the output end of amplifier is connected with resistance R11, rheostat W2, and rheostat W2 is connected with one end of resistance R14, resistance
The other end of R14 is connected with main control module.
3. a kind of flow accumulation device as claimed in claim 1, it is characterised in that the R ends of three end tabilized current power supply LM34 with
One end of resistance R1A, one end connection of resistance R2A, the U- ends of three end tabilized current power supply LM34 and the other end, two of resistance R1A
The anode connection of pole pipe D1, the negative electrode of diode D1 is connected with the other end of resistance R2A, the negative electrode and bridge balance of diode D1
The U+ ends connection of formula absolute pressure sensor, the U- ends ground connection of bridge balance formula absolute pressure sensor, bridge balance formula absolute pressure sensor
One output end is connected with the positive input terminal of amplifier U2A, another output end and the amplifier U1C of bridge balance formula absolute pressure sensor
Positive output end connection, the negative input end of amplifier U2A be connected with resistance R3A, rheostat W3, the negative input end of amplifier U1C and electric
Resistance R4A, rheostat W3 connections, the output end of amplifier U2A are connected with resistance R5A, resistance R3A, the output end and resistance of amplifier U1C
R6A, resistance R4A are connected, and the positive input terminal of amplifier U1B is connected with resistance R5A, resistance R7A, the other end ground connection of resistance R7A, fortune
The negative input end for putting U1B is connected with resistance R6A, rheostat W4, and the output end of amplifier U1B is connected with rheostat W4, amplifier U1B's
Output end is connected with the AD conversion unit input of main control module.
4. a kind of flow accumulation device as claimed in claim 1, it is characterised in that the pin 1 of 485 communication chip U6, pin 4
It is connected with the input and output control end of main control module, pin 6, pin 7 are connected with the output end of host computer respectively；4-20mA electric currents
The pin 1 of pio chip U9 is connected with main control module, and pin 4 and the field instrument control end of 4-20mA electric current pio chips U9 connect
Connect；The pin 1 of CAN interface chip, pin 4 are connected with the input and output pin of main control module, pin 6, pin 7 with it is upper
The input and output pin connection of the bus transceiving chip of machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621372649.7U CN206269875U (en) | 2016-12-14 | 2016-12-14 | A kind of flow accumulation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621372649.7U CN206269875U (en) | 2016-12-14 | 2016-12-14 | A kind of flow accumulation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206269875U true CN206269875U (en) | 2017-06-20 |
Family
ID=59045486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621372649.7U Expired - Fee Related CN206269875U (en) | 2016-12-14 | 2016-12-14 | A kind of flow accumulation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206269875U (en) |
-
2016
- 2016-12-14 CN CN201621372649.7U patent/CN206269875U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170620 Termination date: 20191214 |
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| CF01 | Termination of patent right due to non-payment of annual fee |