CN211554703U - Multi-range voltage-dividing type direct current sampling circuit device - Google Patents
Multi-range voltage-dividing type direct current sampling circuit device Download PDFInfo
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- CN211554703U CN211554703U CN202020358360.XU CN202020358360U CN211554703U CN 211554703 U CN211554703 U CN 211554703U CN 202020358360 U CN202020358360 U CN 202020358360U CN 211554703 U CN211554703 U CN 211554703U
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Abstract
The utility model discloses a multirange partial pressure formula direct current sampling circuit device, including the hinge shell, the inside of hinge shell is provided with port protection circuit, the multiplexing port of multirange, bleeder circuit, microprocessor, data bus, the output of the multiplexing port of multirange with port protection circuit's input is connected, port protection circuit's output through positive generating line and negative bus with bleeder circuit's input is connected, bleeder circuit's output with microprocessor's input is connected, microprocessor's output respectively with bleeder circuit data bus connects. The utility model discloses solved research and development a multirange partial pressure formula direct current sampling circuit device on the whole, integrated multirange, high accuracy direct current sampling function and whole integration are in a module, and are small, with low costs, and it is convenient to change, can be according to the nimble technical demand who disposes of project demand.
Description
Technical Field
The utility model relates to a multirange partial pressure formula direct current sampling circuit device belongs to sampling circuit design technical field.
Background
The industry often needs to measure non-electrical physical quantities such as temperature, pressure and the like, and the data acquisition usually needs to be converted into analog quantities through a sensor and then transmitted to a signal acquisition unit for a processor to judge or display on a human-computer interaction interface for an observer to use. The sensors mostly select 4-20 mA DC current signals or 0-5V DC voltage signals.
Most direct current signal acquisition uses an operational amplifier to build an analog signal sampling network, convert a standard signal into a more reliable voltage signal with the same voltage level as an analog-to-digital converter, convert the voltage signal into a digital signal, and then send the digital signal to a microprocessor in a serial port, parallel port or bus mode.
SUMMERY OF THE UTILITY MODEL
The prior art has the technical defects of lacking in port protection and isolation mode design, limited sampling range and lacking in modular integration.
The utility model aims to solve the technical problem that overcome prior art's defect, provide a multirange partial pressure formula direct current sampling circuit device.
For solving the technical problem, the utility model provides a multirange partial pressure formula direct current sampling circuit device, a serial communication port, including the hinge shell, the inside of hinge shell is provided with the multiplexing port of port protection circuit, multirange, bleeder circuit, microprocessor, data bus, the multiplexing port of multirange the output with port protection circuit's input is connected, port protection circuit's output through positive generating line and negative bus with bleeder circuit's input is connected, bleeder circuit's output with microprocessor's input is connected, microprocessor's output respectively with bleeder circuit data bus connects.
As a preferred embodiment, the port protection circuit comprises a voltage dependent resistor R1 and a safety capacitor C1, wherein one end of the voltage dependent resistor R1 connected in parallel with the safety capacitor C1 is connected with a power supply VDDThe other end of the piezoresistor R1 connected with the safety capacitor C1 in parallel is connected with a positive bus, and the negative bus is grounded.
As a preferred embodiment, the multi-range multiplexing port is externally connected with an input signal Vi1～Vin。
As a preferred embodiment, the voltage dividing circuit comprises n groups of voltage dividing resistors R11, a voltage dividing resistor R22 and photoelectric relays S1-Sn, the voltage dividing resistor R11 and the voltage dividing resistor R22 are connected in parallel and then are respectively connected with the photoelectric relays S1-Sn, the output ends of the photoelectric relays S1-Sn are connected with the input end of the microprocessor, and the input ends of the photoelectric relays S1-Sn are connected with the output end of the microprocessor.
In a preferred embodiment, the data bus is an RS485 bus.
As a preferred embodiment, the both sides of hinge shell are seted up the chamber that holds that the symmetric distribution, and the edge that lies in holding the chamber on the hinge shell articulates and is provided with the hinge board, and the articulated cooperation involution of hinge board holds the chamber.
As a better embodiment, a hinge bent hoop and a hinge pin shaft are fixedly arranged at the joint of the hinge shell and the hinge plate, and the hinge bent hoop is hinged with the bottom end of the hinge plate through the hinge pin shaft.
As a better embodiment, the upper end part and the lower end part of the hinge shell are provided with prefabricated communication grooves for laying communication lines.
As a better embodiment, the outer side of the hinge shell is fixedly provided with an assembling hoop piece, and the assembling hoop piece is provided with scarf assembling grooves which are symmetrically distributed up and down and used for external assembling.
The utility model discloses the beneficial effect who reaches: the utility model discloses to prior art exist lack port protection and isolation mode design, sampling range is limited and lack the technical defect of modularization integration, through the data bus who arranges port protection circuit, multirange multiplex port, bleeder circuit, microprocessor and external communication in the chamber that holds of hinge shell, protect the acquisition signal that comes from multirange multiplex port through port protection circuit, effectively reduce microprocessor inefficacy risk; the direct-current voltage with multiple ranges is precisely divided and matched through resistance value design of a divider resistor R11 and a divider resistor R22 in a divider circuit, and then is precisely conducted through control of a microprocessor through photoelectric relays S1-Sn, so that on the basis of 4-20 mA and 0-5V, high-precision collection of 0-100V direct-current voltage can be achieved through sampling; the microprocessor receives sampling signals input by a plurality of groups of positive and negative buses and feeds the sampling signals back to the photoelectric relays S1-Sn to control the on-off, so that the technical requirements of researching and developing a multi-range voltage-division type direct current sampling circuit device, integrating multi-range and high-precision direct current sampling functions and integrating the multi-range and high-precision direct current sampling functions into a module are integrally solved, the volume is small, the cost is low, the replacement is convenient, and the flexible configuration can be realized according to project requirements; further, the utility model discloses a hinge plate, the assembly hoop spare of external assembly usefulness and lay communication line's prefabricated communication groove of design dismouting usefulness.
Drawings
Fig. 1 is a topological connection diagram of the internal circuit principle of the preferred embodiment of the present invention.
Fig. 2 is a schematic structural view of an external hinge shell according to a preferred embodiment of the present invention.
The meanings of the symbols in the figures: 1-port protection circuit, 2-multi-range multiplexing port, 3-voltage division circuit, 4-microprocessor, 5-data bus, 6-hinge shell, 7-accommodating cavity, 8-assembling hoop, 9-hinge plate, 10-hinge bending hoop, 11-hinge pin shaft, 12-prefabricated communication groove and 13-scarf assembling groove.
Detailed Description
The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1 and fig. 2, the utility model provides a multirange partial pressure formula direct current sampling circuit device, including hinge shell 6, the inside of hinge shell 6 is provided with port protection circuit 1, multirange multiplexing port 2, bleeder circuit 3, microprocessor 4, data bus 5, the output of multirange multiplexing port 2 is connected with port protection circuit 1's input, port protection circuit 1's output is connected with bleeder circuit 3's input through positive generating line and negative generating line, bleeder circuit 3's output is connected with microprocessor 4's input, microprocessor 4's output respectively with bleeder circuit 3, data bus 5 is connected.
As a preferred embodiment, the port protection circuit 1 comprises a voltage dependent resistor R1 and a safety capacitor C1, wherein one end of the voltage dependent resistor R1 connected in parallel with the safety capacitor C1 is connected with a power supply VDDThe other end of the piezoresistor R1 connected with the safety capacitor C1 in parallel is connected with a positive bus, and the negative bus is grounded.
As a preferred embodiment, the multi-range multiplexing port 2 is externally connected with an input signal Vi1～Vin。
As a preferred embodiment, the voltage dividing circuit 3 comprises n groups of voltage dividing resistors R11, a voltage dividing resistor R22 and photoelectric relays S1-Sn, the voltage dividing resistor R11 and the voltage dividing resistor R22 are connected in parallel and then are respectively connected with the photoelectric relays S1-Sn, the output ends of the photoelectric relays S1-Sn are connected with the input end of the microprocessor 4, and the input ends of the photoelectric relays S1-Sn are connected with the output end of the microprocessor 4.
In a preferred embodiment, the data bus 5 is an RS485 bus or an SPI bus.
As a preferred embodiment, the two sides of the hinge shell 6 are provided with the containing cavities 7 which are symmetrically distributed, the edge of the hinge shell 6, which is positioned in the containing cavity 7, is hinged with the hinge plate 9, and the hinge plate 9 is hinged, matched and sealed to contain the containing cavity 7.
As a preferred embodiment, a hinge bent hoop 10 and a hinge pin 11 are fixedly arranged at the connection part of the hinge shell 6 and the hinge plate 9, and the hinge bent hoop 10 is hinged with the bottom end of the hinge plate 9 through the hinge pin 11.
As a preferred embodiment, the hinge shell 6 has prefabricated communication slots 12 formed at upper and lower ends thereof for communication lines.
In a preferred embodiment, a mounting hoop member 8 is fixedly arranged on the outer side of the hinge shell 6, and the mounting hoop member 8 is provided with embedding mounting grooves 13 which are symmetrically distributed up and down and used for external mounting.
The utility model discloses a hold the chamber 7 at hinge shell 6 and arrange port protection circuit 1, multirange multiplexing port 2, bleeder circuit 3, microprocessor 4 and external communication's data bus 5, protect the acquisition signal that comes from multirange multiplexing port 2 through port protection circuit 1, effectively reduce microprocessor 4 inefficacy risk; the direct-current voltage with multiple ranges is precisely divided and matched through resistance value design of a divider resistor R11 and a divider resistor R22 in the voltage dividing circuit 3, and then the photoelectric relays S1-Sn are controlled to be precisely conducted through the microprocessor 4, so that the requirement that on the basis of 4-20 mA and 0-5V, high-precision acquisition can be achieved through sampling of 0-100V direct-current voltage is met; the microprocessor 4 receives sampling signals input by a plurality of groups of positive and negative buses and feeds the sampling signals back to the photoelectric relays S1-Sn to control the on-off, so that the technical requirements of researching and developing a multi-range voltage-dividing type direct current sampling circuit device, integrating multi-range and high-precision direct current sampling functions and integrating the whole device in one module, along with small volume, low cost, convenient replacement and flexible configuration according to project requirements are met; further, the utility model discloses a hinge plate 9 that the design dismouting was used, the assembly hoop 8 of external assembly usefulness and lay communication line's prefabricated communication groove 12.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.
Claims (9)
1. The utility model provides a multirange partial pressure formula direct current sampling circuit device, its characterized in that, includes hinge shell (6), the inside of hinge shell (6) is provided with port protection circuit (1), multirange multiplexing port (2), bleeder circuit (3), microprocessor (4), data bus (5), the output of multirange multiplexing port (2) with the input of port protection circuit (1) is connected, the output of port protection circuit (1) through positive bus and negative bus with the input of bleeder circuit (3) is connected, the output of bleeder circuit (3) with the input of microprocessor (4) is connected, the output of microprocessor (4) respectively with bleeder circuit (3), data bus (5) are connected.
2. The multi-range voltage-dividing DC sampling circuit device according to claim 1, wherein said terminalsThe port protection circuit (1) comprises a voltage dependent resistor R1 and a safety capacitor C1, wherein the voltage dependent resistor R1 and the safety capacitor C1 are connected in parallel and then one end of the voltage dependent resistor R1 is connected with a power supply VDDThe other end of the piezoresistor R1 connected with the safety capacitor C1 in parallel is connected with a positive bus, and the negative bus is grounded.
3. A multirange voltage division dc sampling circuit device according to claim 1, wherein the multirange multiplexing port (2) is externally connected to an input signal Vi1～Vin。
4. The multi-range voltage-dividing type direct current sampling circuit device according to claim 1, wherein the voltage dividing circuit (3) comprises n groups of voltage dividing resistors R11, a voltage dividing resistor R22 and photoelectric relays S1-Sn, the voltage dividing resistor R11 and the voltage dividing resistor R22 are connected in parallel and then are respectively connected with the photoelectric relays S1-Sn, the output ends of the photoelectric relays S1-Sn are connected with the input end of the microprocessor (4), and the input ends of the photoelectric relays S1-Sn are connected with the output end of the microprocessor (4).
5. The multirange voltage-division direct-current sampling circuit device according to claim 1, wherein the data bus (5) is an RS485 bus.
6. The multi-range voltage-dividing type direct current sampling circuit device according to claim 1, wherein the two sides of the hinge shell (6) are provided with symmetrically distributed accommodating cavities (7), the edge of the hinge shell (6) located in the accommodating cavities (7) is hinged with a hinge plate (9), and the hinge plate (9) is hinged and matched to seal the accommodating cavities (7).
7. The multi-range voltage-dividing type direct current sampling circuit device according to claim 6, wherein a hinge bent hoop (10) and a hinge pin shaft (11) are fixedly arranged at the joint of the hinge shell (6) and the hinge plate (9), and the hinge bent hoop (10) is hinged with the bottom end of the hinge plate (9) through the hinge pin shaft (11).
8. The multi-range voltage-dividing type direct current sampling circuit device according to claim 1, wherein the upper end portion and the lower end portion of the hinge shell (6) are provided with prefabricated communication grooves (12) for laying communication lines.
9. The multi-range voltage-dividing type direct current sampling circuit device according to claim 1, wherein an assembling hoop (8) is fixedly arranged on the outer side of the hinge shell (6), and the assembling hoop (8) is provided with embedding assembling grooves (13) which are symmetrically distributed up and down and used for external assembling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020358360.XU CN211554703U (en) | 2020-03-20 | 2020-03-20 | Multi-range voltage-dividing type direct current sampling circuit device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020358360.XU CN211554703U (en) | 2020-03-20 | 2020-03-20 | Multi-range voltage-dividing type direct current sampling circuit device |
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| Publication Number | Publication Date |
|---|---|
| CN211554703U true CN211554703U (en) | 2020-09-22 |
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|---|---|---|---|
| CN202020358360.XU Active CN211554703U (en) | 2020-03-20 | 2020-03-20 | Multi-range voltage-dividing type direct current sampling circuit device |
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