CN211627759U - Switching value analog quantity acquisition terminal - Google Patents
Switching value analog quantity acquisition terminal Download PDFInfo
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- CN211627759U CN211627759U CN201922415694.6U CN201922415694U CN211627759U CN 211627759 U CN211627759 U CN 211627759U CN 201922415694 U CN201922415694 U CN 201922415694U CN 211627759 U CN211627759 U CN 211627759U
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Abstract
The utility model discloses a switching value analog quantity acquisition terminal belongs to signal acquisition technical field, include: a LORA core module; the current acquisition circuit module is provided with a current input end connected with an external current signal to be acquired, and a first voltage output end connected with the LORA core module; the voltage acquisition circuit module is connected with a voltage input end to be acquired external voltage signal and a second voltage output end to be connected with the LORA core module; the input end of the switching value is connected with an external switching value signal to be acquired, and the third voltage output end of the level conversion circuit module is connected with the LORA core module; the beneficial effects are that: through adopting LORA wireless communication technique, not only improved the distance of communication, strengthened acquisition terminal's interference killing feature, improved the security of data, reduced the consumption simultaneously, reduced the cost of hardware.
Description
Technical Field
The utility model relates to a signal acquisition technical field especially relates to a switching value analog quantity acquisition terminal.
Background
The on-off acquisition refers to acquisition and output of a discontinuous signal, the on-off amount generally has two states of 0 and 1 in a digital circuit, the on-off state of a switch, the on-off state of a relay, the on-off state of an electromagnetic valve and the like in the circuit, and the analog acquisition refers to acquisition and output of a continuous signal which is a value continuously changing in a certain range.
In the practical application of the circuit, the analog quantity acquisition mainly acquires a current signal of 4-20mA and a voltage signal of 0-10V, and the two signals are usually used for information output of various instruments; the acquisition of the switching value signals is mainly divided into two categories, one category is a dry node type, and the other category is a digital signal type; however, no matter the acquisition of the switching value signal or the acquisition of the analog value signal, the acquired signal needs to be processed and then networked, the communication mode adopted in the prior art is a wifi wireless communication technology or a small wireless communication technology, and the communication method has the defects of poor quality of transmitted signals, long switching time, small coverage radius, low bandwidth, poor data safety and the like, and has short signal transmission communication distance and poor anti-interference capability.
SUMMERY OF THE UTILITY MODEL
According to the above-mentioned problem that exists among the prior art, now provide a switching value analog quantity acquisition terminal, this terminal is through adopting LORA wireless communication technique, has not only improved the distance of communication, has strengthened acquisition terminal's interference killing feature, has reduced the consumption simultaneously, has reduced the cost of hardware.
The technical scheme specifically comprises the following steps:
the utility model provides a switching value analog quantity acquisition terminal which characterized in that includes:
a LORA core module;
the current acquisition circuit module comprises a current input end and a first voltage output end, the current input end is connected with an external current signal to be acquired, and the first voltage output end is connected with the LORA core module;
the voltage acquisition circuit module comprises a voltage input end and a second voltage output end, the voltage input end is connected with an external voltage signal to be acquired, and the second voltage output end is connected with the LORA core module;
the level conversion circuit module comprises a switching value input end and a third voltage output end, the switching value input end is connected with an external switching value signal to be collected, and the third voltage output end is connected with the LORA core module.
Preferably, the collection terminal further includes a power adapter, which is electrically connected to the LORA core module, the current collection circuit module, and the level conversion circuit module, respectively, and is configured to supply power to the collection terminal.
Preferably, the collection terminal further comprises an LED indicator connected to the LORA core module.
Preferably, the level shift circuit module specifically includes:
a fixed voltage terminal;
the base electrode of the first triode is connected with the switching value input end through a first resistor, the collector electrode of the first triode is connected with the fixed voltage end through a second resistor, and the emitting electrode of the first triode is grounded;
the base electrode of the second triode is connected with the collector electrode of the first triode through a third resistor, the collector electrode of the second triode is connected with the fixed voltage end through a fourth resistor, and the emitting electrode of the second triode is grounded;
and the third voltage output end is connected between the fourth resistor and the collector of the second triode.
Preferably, wherein the fixed voltage terminal voltage is 5V.
Preferably, wherein the first resistance value is 100K ohms.
Preferably, the second resistor, the third resistor and the fourth resistor are all 1K ohm.
Preferably, the current acquisition circuit module is a 4-20mA to 0-3.3V circuit module.
Preferably, the voltage acquisition circuit module specifically includes:
the fifth resistor is connected with the voltage input end;
the sixth resistor is respectively connected with the fifth resistor and the grounding terminal;
the second voltage output end is connected between the fifth resistor and the sixth resistor.
Preferably, the fifth resistor is 10K ohms in resistance, and the sixth resistor is 3.3K ohms in resistance.
The beneficial effects of the above technical scheme are that:
the utility model provides a switching value analog quantity acquisition terminal, this terminal is through adopting LORA wireless communication technique, has not only improved the distance of communication, has strengthened acquisition terminal's interference killing feature, has improved the security of data, has reduced the consumption simultaneously, has reduced the cost of hardware.
Drawings
Fig. 1 is a block diagram of a switching value analog quantity acquisition terminal according to a preferred embodiment of the present invention;
fig. 2 is a circuit diagram of a level shift circuit module according to a preferred embodiment of the present invention;
fig. 3 is a circuit diagram of the voltage acquisition circuit module according to the preferred embodiment of the present invention.
The specification reference numbers indicate:
LORA core module (1), current acquisition circuit module (2), voltage acquisition circuit module (3), level conversion circuit module (4), voltage input end (V)in) Second voltage output terminal (V)out2) Input end of switching value (V)k) Third voltage inputOut end (V)out3) Fixed voltage terminal (V)s) The circuit comprises a first resistor (R1), a second resistor (R2), a third resistor (R3), a fourth resistor (R4), a first triode (Q1), a second triode (Q2), a fifth resistor (R5) and a sixth resistor (R6).
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.
A switching value analog quantity acquisition terminal, as shown in fig. 1, comprising:
LORA core module 1;
the current acquisition circuit module 2 comprises a current input end and a first voltage output end, wherein the current input end is connected with an external current signal to be acquired, and the first voltage output end is connected with the LORA core module 1;
the voltage acquisition circuit module 3, the voltage acquisition circuit module 3 includes a voltage input end Vin and a second voltage output end Vout2, the voltage input end Vin is connected with the external voltage signal to be acquired, the second voltage output end Vout2 is connected with the LORA core module 1;
the level shift circuit module 4, the level shift circuit module 4 includes a switching value input terminal Vk, and a third voltage output terminal Vout3, the switching value input terminal Vk is connected to the external switching value signal to be collected, and the third voltage output terminal Vout3 is connected to the LORA core module 1.
As a preferred embodiment, the switching value analog quantity acquisition terminal adopts a power-on reset mode for reset design, and the LORA core module adopts a V2.1 version and is controlled by using an MCU (microprocessor) inside the LORA core module.
In the preferred embodiment of the present invention, the collection terminal further includes a power adapter, which is electrically connected to the LORA core module 1, the current collection circuit module 2, and the level conversion circuit module 4, respectively, for supplying power to the collection terminal.
Specifically, in this embodiment, a power chip in the power adapter is a DC-DC chip, the specific model of which is MPSMP2314, the input voltage range of the chip is 4.5V-24V, the output voltage can be adjusted according to actual needs, the maximum load current of the chip is 2A, the chip is packaged by SOT23-8, and the working efficiency is 96%.
In the preferred embodiment of the present invention, the collection terminal further includes an LED indicator connected to the LORA core module 1.
Specifically, in this embodiment, in order to conveniently display the current working state of the acquisition terminal and to facilitate subsequent debugging of the acquisition terminal, one path of LED indicator lamps is added for prompting the user.
In the preferred embodiment of the present invention, as shown in fig. 2, the level shift circuit module 4 specifically includes:
a fixed voltage terminal Vs;
a first triode Q1, wherein the base of the first triode Q1 is connected with the switching value input end Vk through a first resistor R1, the collector of the first triode Q1 is connected with the fixed voltage end Vs through a second resistor R2, and the emitter of the first triode Q1 is grounded;
a base electrode of the second triode Q2 is connected with a collector electrode of the first triode through a third resistor R3, a collector electrode of the second triode Q2 is connected with a fixed voltage end Vs through a fourth resistor R4, and an emitter electrode of the second triode Q2 is grounded;
the third voltage output terminal Vout3 is connected between the fourth resistor R4 and the collector of the second transistor Q2.
Specifically, in this embodiment, the level shift circuit module 4 uses a triode to perform voltage conversion, and converts 12V or 24V of the input voltage into 5V of voltage to be input into the corresponding interface of the LORA core module 1.
In the preferred embodiment of the present invention, the voltage at the fixed voltage end Vs is 5V.
In the preferred embodiment of the present invention, the first resistor R1 has a resistance of 100K ohms.
In the preferred embodiment of the present invention, the resistances of the second resistor R2, the third resistor R3 and the fourth resistor R4 are all 1K ohm.
In the preferred embodiment of the present invention, the current collection circuit module 2 is a 4-20mA to 0-3.3V circuit module.
Specifically, in this embodiment, the current collection circuit module 2 is a 4-20mA current conversion circuit for converting the collected current signal into a voltage signal for outputting, in this embodiment, the output voltage signal is between 0-3.3V, and this current collection circuit module 2 is prior art, and can adopt the non-isolated module in prior art, and the non-isolated module has the advantages of low cost, wide range of support supply voltage, adjustable output voltage, and the like, in another embodiment of the present invention, the current collection circuit module 2 can also adopt the isolated module. The power supply voltage of the selected non-isolation module is 7V-36V, the current detection range for collecting current signals is 0-20mA, the range of the voltage signals output after conversion can be selected according to actual needs, and the output ranges of the voltage signals include 0-2.5V,3.3V,5V and 10V.
In the preferred embodiment of the present invention, as shown in fig. 3, the voltage acquisition circuit module 3 specifically includes:
a fifth resistor R5 connected to the voltage input terminal Vin;
the sixth resistor R6 is respectively connected with the fifth resistor R5 and the ground terminal;
the second voltage output terminal Vout2 is connected between the fifth resistor R5 and the sixth resistor R6.
Specifically, in this embodiment, the voltage acquisition circuit module 3 directly adopts resistance voltage division, inputs the divided second voltage output terminal Vout2 signal into a corresponding interface of the LORA core module, and may subsequently adopt an operational amplifier or an isolation transmitter to process the input signal.
In the preferred embodiment of the present invention, the resistance of the fifth resistor R5 is 10K ohms, and the resistance of the sixth resistor R6 is 3.3K ohms.
The beneficial effects of the above technical scheme are that:
the utility model provides a switching value analog quantity acquisition terminal, this terminal is through adopting LORA wireless communication technique, has not only improved the distance of communication, has strengthened acquisition terminal's interference killing feature, has reduced the consumption simultaneously, has reduced the cost of hardware.
The above description is only an example of the preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and those skilled in the art should be able to realize the equivalent alternatives and obvious variations of the present invention.
Claims (10)
1. The utility model provides a switching value analog quantity acquisition terminal which characterized in that includes:
a LORA core module;
the current acquisition circuit module comprises a current input end and a first voltage output end, the current input end is connected with an external current signal to be acquired, and the first voltage output end is connected with the LORA core module;
the voltage acquisition circuit module comprises a voltage input end and a second voltage output end, the voltage input end is connected with an external voltage signal to be acquired, and the second voltage output end is connected with the LORA core module;
the level conversion circuit module comprises a switching value input end and a third voltage output end, the switching value input end is connected with an external switching value signal to be collected, and the third voltage output end is connected with the LORA core module.
2. The terminal of claim 1, further comprising a power adapter electrically connected to the LORA core module, the current collection circuit module, and the level conversion circuit module, respectively, for supplying power to the collection terminal.
3. The terminal of claim 1, further comprising an LED indicator connected to the LORA core module.
4. The terminal for collecting switching value analog quantity according to claim 1, wherein the level conversion circuit module specifically comprises:
a fixed voltage terminal;
the base electrode of the first triode is connected with the switching value input end through a first resistor, the collector electrode of the first triode is connected with the fixed voltage end through a second resistor, and the emitting electrode of the first triode is grounded;
the base electrode of the second triode is connected with the collector electrode of the first triode through a third resistor, the collector electrode of the second triode is connected with the fixed voltage end through a fourth resistor, and the emitting electrode of the second triode is grounded;
the third voltage output end is connected between the fourth resistor and the collector of the second triode.
5. The terminal of claim 4, wherein the fixed voltage terminal voltage is 5V.
6. The terminal for collecting the switching value analog quantity according to claim 4, wherein the first resistance value is 100K ohms.
7. The terminal for collecting the switching value analog quantity according to claim 4, wherein the second resistor, the third resistor and the fourth resistor are all 1K ohm.
8. The terminal for collecting the switching value analog quantity of claim 1, wherein the current collecting circuit module is a circuit module for converting 4-20mA into 0-3.3V.
9. The terminal for collecting the switching value analog quantity according to claim 1, wherein the voltage collecting circuit module specifically comprises:
the fifth resistor is connected with the voltage input end;
the sixth resistor is respectively connected with the fifth resistor and the grounding terminal;
the second voltage output end is connected between the fifth resistor and the sixth resistor.
10. The terminal for collecting the switching value analog quantity according to claim 9, wherein the fifth resistor has a resistance value of 10K ohms, and the sixth resistor has a resistance value of 3.3K ohms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922415694.6U CN211627759U (en) | 2019-12-26 | 2019-12-26 | Switching value analog quantity acquisition terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922415694.6U CN211627759U (en) | 2019-12-26 | 2019-12-26 | Switching value analog quantity acquisition terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211627759U true CN211627759U (en) | 2020-10-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922415694.6U Active CN211627759U (en) | 2019-12-26 | 2019-12-26 | Switching value analog quantity acquisition terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211627759U (en) |
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2019
- 2019-12-26 CN CN201922415694.6U patent/CN211627759U/en active Active
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