CN203489935U - Field display flow converter for low-temperature environment - Google Patents
Field display flow converter for low-temperature environment Download PDFInfo
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- CN203489935U CN203489935U CN201320663749.5U CN201320663749U CN203489935U CN 203489935 U CN203489935 U CN 203489935U CN 201320663749 U CN201320663749 U CN 201320663749U CN 203489935 U CN203489935 U CN 203489935U
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- 238000010438 heat treatment Methods 0.000 claims abstract description 31
- 238000001914 filtration Methods 0.000 claims abstract description 13
- 239000011521 glass Substances 0.000 claims description 9
- 230000003321 amplification Effects 0.000 claims description 8
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 8
- 239000000758 substrate Substances 0.000 claims description 7
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 230000008676 import Effects 0.000 claims description 3
- 229910052697 platinum Inorganic materials 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000006243 chemical reaction Methods 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 6
- 239000004973 liquid crystal related substance Substances 0.000 description 6
- 238000009413 insulation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000005355 lead glass Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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Abstract
The utility model relates to a field display flow converter for a low-temperature environment. The converter comprises a temperature sensor, a signal amplifying and filtering circuit, an A/D (Analogue to Digital) conversion circuit, an MCU (Microprogrammed Control Unit) central processor, a heating control circuit, a heating resistor assembly, a mode setting assembly and an in-meter temperature display assembly, wherein the temperature sensor, the signal amplifying and filtering circuit, the A/D conversion circuit, the MCU central processor, the heating control circuit and the heating resistor assembly are sequentially connected, and the MCU central processor is connected with the mode setting assembly and the in-meter temperature display assembly. The converter has the beneficial effects that the in-meter temperature is determined through the in-meter temperature display assembly, and the heating resistor assembly is controlled through the mode setting assembly, so that the in-meter temperature is adjusted, the energy consumption is reduced, and the work efficiency of flow is increased.
Description
Technical field
The utility model relates to field of flow meters, particularly a kind of flow converter.
Background technology
Current most of flowmeter is furnished with liquid crystal display.Along with the reduction of temperature, the liquid crystal material viscous that will become, response speed is slack-off, and image occurs that conditions of streaking even can not show; And then cause liquid crystal state to disappear, become crystal.Flowmeter, due to environment for use, often will be arranged on outdoor.Yet the impact that the low temperature environment in winter is serious the usability of flowmeter, even can cause flowmeter to damage because of low temperature.
For problems, common way is driving voltage or the additional heat-insulation layer that promotes liquid crystal display.According to the temperature of external environment, change the driving voltage of liquid crystal display so that display is realized demonstration at low temperatures, it is-20 ℃～+ 50 ℃ that this kind of method can make the operating temperature range of liquid crystal display.But driving voltage can not unconfined raising, after driving voltage is brought up to a certain degree, the contrast of display can obviously decline, even blank screen and cause display to use.Additional heat-insulation layer technology is generally used for being incubated measuring channel, and meter transformer, due to the restriction of display operating panel, can not seal completely, so heat insulation effect reduces greatly.
Summary of the invention
The purpose of this utility model is in order to address the above problem, and has designed a kind of scene for low temperature environment and has shown flow converter.Specific design scheme is:
A kind of scene for low temperature environment shows flow converter, comprise temperature sensor, signal amplifies and filtering circuit, A/D change-over circuit, MCU central processing unit, heating control circuit, heating resistor assembly, pattern assignment component, temperature display module in table, described temperature sensor, signal amplifies and filtering circuit, A/D change-over circuit, MCU central processing unit, heating control circuit, heating resistor assembly is connected successively, described MCU central processing unit and described pattern assignment component, in table, temperature display module is connected, in described heating control circuit, the control signal of single-chip microcomputer connects the not gate of U1, U1 connects the input negative terminal of optocoupler O1B, one end of the positive termination R1 of input of optocoupler O1B, another termination power 3V of R1, the output of optocoupler connects one end of R2, another termination power 24V of R2, the drive end of electrical equipment K1 is succeeded in the output of optocoupler, another drive end ground connection of K1, the actuating station 1 of relay K 1 connects the negative terminal of optocoupler D1, the positive termination power 24V of optocoupler D1, the actuating station 2 of relay K 1 connects one end of heating resistor assembly silk RX, the other end ground connection of RX.
In signal amplification and filtering circuit, PT100 is identical with PT socket lead, and socket type is different, the platinum resistance socket of corresponding different model.1 pin of socket and 2 pin short circuits, connect one end of C6, one end of one end of R15, C16 and one end of R32; 3 pin of socket connect the other end of C6, the other end of one end of R16, C16 and one end of R30; The other end ground connection of R15; The other end of R16 connects the reference voltage that label is VPT100; 2 pin of the other end access U3 chip of R32; 3 pin of the other end access U3 chip of R30; R312, R311, tri-circuit parallel connections of R31,1 pin and 8 pin of U3 chip are accessed respectively at two ends; 7 pin of U3 chip connect 3V Power supply; 6 pin of U3 chip are output, connect one end of R33, behind one end of another termination C17 of R33, as temperature signal, import central authorities into and process inner; 4 pin of U3 chip and 5 pin short circuits, the other end of connection C17 and ground reference point; V5 chip is voltage source, and 1 pin meets power supply VT; 2 pin ground connection; 3 pin connect single-chip microcomputer control end, connect one end of R47 simultaneously; The other end ground connection of R47; 5 pin meet C32 and C31, and as the reference power source of temperature amplification chip; The other end ground connection of C31 and C32.
Heating resistor assembly comprises PCB substrate, liquid-crystalline glasses, resistive heater, and described liquid-crystalline glasses is fixed on described PCB substrate, and described resistive heater is fixed on described liquid-crystalline glasses.
The scene for low temperature environment obtaining by above-mentioned design proposal of the present utility model shows flow converter, and its beneficial effect is:
Can determine temperature in table by showing interior temperature demonstration display module, then by pattern assignment component, heating resistor assembly be controlled, carry out temperature in reconciliation statement, reduce energy consumption, the work efficiency of increase flow.
Accompanying drawing explanation
Fig. 1 is the theory diagram that the scene for low temperature environment described in the utility model shows flow converter;
Fig. 2 is the circuit diagram of signal amplification described in the utility model and filtering circuit;
Fig. 3 is the circuit diagram of heating control circuit described in the utility model;
Fig. 4 is the structural representation of heating resistor assembly described in the utility model;
In figure, 1, PCB substrate; 2, crystal glass; 3, resistive heater.
Embodiment
Below in conjunction with accompanying drawing, the utility model is specifically described.
Fig. 1 is the theory diagram that the scene for low temperature environment described in the utility model shows flow converter, as shown in Figure 1, a kind of scene for low temperature environment shows flow converter, comprise temperature sensor, signal amplifies and filtering circuit, A/D change-over circuit, MCU central processing unit, heating control circuit, heating resistor assembly, pattern assignment component, temperature display module in table, described temperature sensor, signal amplifies and filtering circuit, A/D change-over circuit, MCU central processing unit, heating control circuit, heating resistor assembly is connected successively, described MCU central processing unit and described pattern assignment component, in table, temperature display module is connected.
Fig. 2 is the circuit diagram of signal amplification described in the utility model and filtering circuit, and as shown in Figure 2, in signal amplification and filtering circuit, PT100 is identical with PT socket lead, and socket type is different, the platinum resistance socket of corresponding different model.1 pin of socket and 2 pin short circuits, connect one end of C6, one end of one end of R15, C16 and one end of R32; 3 pin of socket connect the other end of C6, the other end of one end of R16, C16 and one end of R30; The other end ground connection of R15; The other end of R16 connects the reference voltage that label is VPT100; 2 pin of the other end access U3 chip of R32; 3 pin of the other end access U3 chip of R30; R312, R311, tri-circuit parallel connections of R31,1 pin and 8 pin of U3 chip are accessed respectively at two ends; 7 pin of U3 chip connect 3V Power supply; 6 pin of U3 chip are output, connect one end of R33, behind one end of another termination C17 of R33, as temperature signal, import central authorities into and process inner; 4 pin of U3 chip and 5 pin short circuits, the other end of connection C17 and ground reference point; V5 chip is voltage source, and 1 pin meets power supply VT; 2 pin ground connection; 3 pin connect single-chip microcomputer control end, connect one end of R47 simultaneously; The other end ground connection of R47; 5 pin meet C32 and C31, and as the reference power source of temperature amplification chip; The other end ground connection of C31 and C32.
Fig. 3 is the circuit diagram of heating control circuit described in the utility model, and as shown in Figure 3, in described heating control circuit, the control signal of single-chip microcomputer connects the not gate of U1; U1 connects the input negative terminal of optocoupler O1B; One end of the positive termination R1 of input of optocoupler O1B; Another termination power 3V of R1; The output of optocoupler connects one end of R2; Another termination power 24V of R2; The drive end of electrical equipment K1 is succeeded in the output of optocoupler; Another drive end ground connection of K1; The actuating station 1 of relay K 1 connects the negative terminal of optocoupler D1; The positive termination power 24V of optocoupler D1; The actuating station 2 of relay K 1 connects one end of heating resistor assembly silk RX; The other end ground connection of RX.。
Fig. 4 is the structural representation of heating resistor assembly described in the utility model, as shown in Figure 4, heating resistor assembly comprises PCB substrate 1, liquid-crystalline glasses 2, resistive heater 3, and described liquid-crystalline glasses 2 is fixed on described PCB substrate 1, and described resistive heater 3 is fixed on described liquid-crystalline glasses 2.
Technique scheme has only embodied the optimal technical scheme of technical solutions of the utility model; those skilled in the art have all embodied principle of the present utility model to some changes that wherein some part may be made, within belonging to protection domain of the present utility model.
Claims (3)
1. the scene for low temperature environment shows flow converter, comprise temperature sensor, signal amplifies and filtering circuit, A/D change-over circuit, MCU central processing unit, heating control circuit, heating resistor assembly, pattern assignment component, temperature display module in table, it is characterized in that, described temperature sensor, signal amplifies and filtering circuit, A/D change-over circuit, MCU central processing unit, heating control circuit, heating resistor assembly is connected successively, described MCU central processing unit and described pattern assignment component, in table, temperature display module is connected, in described heating control circuit, the control signal of single-chip microcomputer connects the not gate of U1, U1 connects the input negative terminal of optocoupler O1B, one end of the positive termination R1 of input of optocoupler O1B, another termination power 3V of R1, the output of optocoupler connects one end of R2, another termination power 24V of R2, the drive end of electrical equipment K1 is succeeded in the output of optocoupler, another drive end ground connection of K1, the actuating station 1 of relay K 1 connects the negative terminal of optocoupler D1, the positive termination power 24V of optocoupler D1, the actuating station 2 of relay K 1 connects one end of heating resistor assembly silk RX, the other end ground connection of RX.
2. according to the scene for low temperature environment described in claim 1, show flow converter, it is characterized in that, in signal amplification and filtering circuit, PT100 is identical with PT socket lead, socket type is different, the platinum resistance socket of corresponding different model, 1 pin of socket and 2 pin short circuits, connect one end of C6, one end of one end of R15, C16 and one end of R32; 3 pin of socket connect the other end of C6, the other end of one end of R16, C16 and one end of R30; The other end ground connection of R15; The other end of R16 connects the reference voltage that label is VPT100; 2 pin of the other end access U3 chip of R32; 3 pin of the other end access U3 chip of R30; R312, R311, tri-circuit parallel connections of R31,1 pin and 8 pin of U3 chip are accessed respectively at two ends; 7 pin of U3 chip connect 3V Power supply; 6 pin of U3 chip are output, connect one end of R33, behind one end of another termination C17 of R33, as temperature signal, import central authorities into and process inner; 4 pin of U3 chip and 5 pin short circuits, the other end of connection C17 and ground reference point; V5 chip is voltage source, and 1 pin meets power supply VT; 2 pin ground connection; 3 pin connect single-chip microcomputer control end, connect one end of R47 simultaneously; The other end ground connection of R47; 5 pin meet C32 and C31, and as the reference power source of temperature amplification chip; The other end ground connection of C31 and C32.
3. according to the scene for low temperature environment described in claim 1, show flow converter, it is characterized in that, heating resistor assembly comprises PCB substrate (1), liquid-crystalline glasses (2), resistive heater (3), it is upper that described liquid-crystalline glasses (2) is fixed on described PCB substrate (1), and described resistive heater (3) is fixed on described liquid-crystalline glasses (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320663749.5U CN203489935U (en) | 2013-10-25 | 2013-10-25 | Field display flow converter for low-temperature environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320663749.5U CN203489935U (en) | 2013-10-25 | 2013-10-25 | Field display flow converter for low-temperature environment |
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| Publication Number | Publication Date |
|---|---|
| CN203489935U true CN203489935U (en) | 2014-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320663749.5U Expired - Lifetime CN203489935U (en) | 2013-10-25 | 2013-10-25 | Field display flow converter for low-temperature environment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104270835A (en) * | 2014-10-08 | 2015-01-07 | 四川华拓光通信股份有限公司 | Optical module capable of working in low-temperature environment and method for realizing work thereof |
| CN104503520A (en) * | 2014-12-09 | 2015-04-08 | 国网上海市电力公司 | On-off control circuit for heater in power distribution cabinet |
-
2013
- 2013-10-25 CN CN201320663749.5U patent/CN203489935U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104270835A (en) * | 2014-10-08 | 2015-01-07 | 四川华拓光通信股份有限公司 | Optical module capable of working in low-temperature environment and method for realizing work thereof |
| CN104503520A (en) * | 2014-12-09 | 2015-04-08 | 国网上海市电力公司 | On-off control circuit for heater in power distribution cabinet |
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Granted publication date: 20140319 |
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| CX01 | Expiry of patent term |