CN212255460U

CN212255460U - Voltage meter

Info

Publication number: CN212255460U
Application number: CN202020670553.9U
Authority: CN
Inventors: 胡伟平; 洪少林; 李成; 杨志凌; 钟泓; 饶哲章
Original assignee: Uni Trend Technology China Co Ltd
Current assignee: Uni Trend Technology China Co Ltd
Priority date: 2020-04-28
Filing date: 2020-04-28
Publication date: 2020-12-29
Anticipated expiration: 2030-04-28

Abstract

The utility model discloses a voltmeter, include voltage data acquisition module, data processing module, infrared transmission module and the LORA transmission module that connects gradually according to voltage data transmission order, voltage data acquisition module is including gathering the chip, and connect the acquisition circuit on this gathers chip forty pins. The utility model has the advantages of simple and reasonable structure, design benefit to need not through manual operation, connect the power as this voltmeter, LORA transmission module connects automatic network deployment, and this voltmeter still has transmission distance far away, advantages such as interference killing feature is strong.

Description

Voltage meter

Technical Field

The utility model relates to a voltage measurement equipment technical field, in particular to voltmeter.

Background

Present voltmeter basically all needs the operator to adopt handheld mode to monitor and read data at the scene, partly again through bluetooth and WIFI transmission data to terminal rereading data, but bluetooth, WIFI transmission all adopt the 2.4G frequency channel, this frequency channel is disturbed mutually by other signals in the external world easily, thereby influence data transmission efficiency, and bluetooth, WIFI transmission effective range is little, when having the barrier to obstruct in the within range, the condition such as disconnection network or appearance connection interruption easily, influence measurement of efficiency.

Disclosure of Invention

An object of the utility model is to provide a voltmeter to above-mentioned problem.

The utility model discloses a realize that the technical scheme that above-mentioned purpose adopted does:

a voltmeter comprises a voltage data acquisition module, a data processing module, an infrared transmission module and an LORA transmission module which are sequentially connected according to a voltage data transmission sequence, wherein the voltage data acquisition module comprises an acquisition chip and an acquisition circuit connected to the fortieth pin of the acquisition chip, the acquisition circuit comprises a thermistor PTC1, a resistor R1, R2, R3, R4, R24, R27, R30, R37, an inductor L1, a capacitor C1, a piezoresistor SG1 and SG2, the inductor L1, the resistor R4, R3, R2 and R1 are sequentially connected in series to form a first branch, the piezoresistor SG1 and the SG2 are sequentially connected in series to form a second branch, the resistors R37, R31, R30, R27 and R24 are sequentially connected in series to form a third branch, the first branch, the second branch and the third branch are connected in parallel, and an acquisition voltage input end V1 is connected with the first branch and the second branch through the resistor PTC1 and the third branch, the capacitor C1 is disposed between the first branch and the second branch.

Preferably, the data processing module includes a data processing chip, a thirty-first pin and a thirty-first pin of the data processing chip are respectively connected to a twenty-first pin and a twentieth pin of the acquisition chip, and a twelfth pin of the data processing chip is connected to the infrared transmission module.

More preferably, the model of the data processing chip is HC32L130J8 TA.

Preferably, the infrared transmission module includes a transmitting unit and a receiving unit connected and communicated with the transmitting unit through an infrared signal, the transmitting unit includes a transmitting circuit, the transmitting circuit includes a resistor R39, a transistor Q6 and a diode D5, a base of the transistor Q6 is connected with the data processing module through the resistor R39, and a collector of the transistor Q6 is connected with an anode of the diode D5.

Preferably, the receiving unit includes a receiving circuit, the receiving circuit includes a first conducting unit and a second conducting unit, the first conducting unit includes a diode D6, a transistor Q5, a resistor R21, and a resistor R46, a cathode of the diode D6 is connected to an emitter of the transistor Q5 through the resistor R21, and a collector of the transistor Q5 is connected to an anode of the diode D6 through the resistor R46;

the second conducting unit comprises a triode Q11, a triode Q12, resistors R40 and R48, wherein the collector of the triode Q5 is connected with the base of the triode Q11 through a resistor R45, the emitter of the triode Q5 is connected with the resistor R40, the emitter of the triode Q11 is connected with the resistor R46, the emitter of the triode Q11 is connected with the emitter of the triode Q12 through the resistor R48, and the collector of the triode Q11 is connected with the collector of the triode Q12 through the resistor R40.

Preferably, the LORA transmission module includes a transmission chip, an eighth pin of the transmission chip is connected to the infrared transmission module, and a second pin of the transmission chip is connected to the antenna pedestal through an inductor L2.

More preferably, the model of the transmission chip is RHF0M 003.

The utility model has the advantages that: the utility model has the advantages of simple and reasonable structure, design benefit to need not through manual operation, connect the power as this voltmeter, LORA transmission module connects automatic network deployment, and this voltmeter still has transmission distance far away, advantages such as interference killing feature is strong.

The present invention will be further explained with reference to the drawings and the embodiments.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic block diagram of the circuit of the present invention;

fig. 2 is a schematic structural diagram of a medium voltage data acquisition module according to the present invention;

FIG. 3 is a schematic structural diagram of a data processing module according to the present invention;

fig. 4 is a schematic structural diagram of the mid-infrared transmission module of the present invention;

fig. 5 is a schematic structural diagram of the LORA transmission module of the present invention.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the description of the present invention, it is to be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly connected" to another element, there are no intervening elements present.

As shown in fig. 1 to 5, in an embodiment of the voltmeter, the voltmeter includes a voltage data acquisition module 1, a data processing module 2, an infrared transmission module 3, and a LORA transmission module 4, which are sequentially connected in a voltage data transmission sequence, the voltage data acquisition module 1 includes an acquisition chip and an acquisition circuit connected to a forty-th pin of the acquisition chip, the acquisition circuit includes a thermistor PTC1, a resistor R1, an R2, an R3, an R4, an R24, an R27, an R30, an R37, an inductor L1, a capacitor C1, a piezoresistor SG1, and an SG2, the inductor L1, the resistor R4, the R3, the R2, and the R1 are sequentially connected in series to form a first branch, the piezoresistor SG1, the SG2 are sequentially connected in series to form a second branch, the resistors R37, the R31, the R30, the R27, and the R24 are sequentially connected in series to form a third branch, the first branch, the second branch, the piezoresistor SG1, the third branch, the voltage data acquisition module V1, and the first PTC 467 are, The left ends of the second branch and the third branch are connected, and the capacitor C1 is arranged between the first branch and the second branch.

Specifically, firstly, a COM terminal is arranged between the second branch and the third branch, and the COM terminal and the thermistor PTC1 play a role in input overheat protection in the acquisition circuit;

secondly, in the first branch, the total resistance of R1, R2, R3 and R4 is 10M omega, so that the input protection function can be realized; in the third branch, the total resistance of R24, R27, R30, R31 and R37 is 1500K omega, and the function of input voltage protection can be achieved;

thirdly, the piezoresistors SG1 and SG2 can play a role in protecting input pulses;

in the second time, the capacitor C1 is used to remove noise from the collected voltage signal.

In an embodiment of the voltmeter, the data processing module 2 includes a data processing chip, the thirty-first pin and the thirty-first pin of the data processing chip are respectively connected to the twenty-first pin and the twenty-second pin of the acquisition chip, and the twelfth pin of the data processing chip is connected to the infrared transmission module 3. The model of the data processing chip is HC32L130J8 TA.

Specifically, the data processing chip reads and receives data acquired by the voltage acquisition circuit through the thirtieth pin and the thirty-first pin, and then processes and packages the data; and then the packaged data is sent to the infrared transmission module 3 through the twelfth pin.

In an embodiment of the voltmeter, the infrared transmission module 3 includes a transmitting unit and a receiving unit connected and communicated with the transmitting unit through an infrared signal, the transmitting unit includes a transmitting circuit, the transmitting circuit includes a resistor R39, a transistor Q6 and a diode D5, a base of the transistor Q6 is connected with the data processing module 2 through the resistor R39, and a collector of the transistor Q6 is connected with an anode of the diode D5. The receiving unit comprises a receiving circuit, the receiving circuit comprises a first conducting unit and a second conducting unit, the first conducting unit comprises a diode D6, a triode Q5, a resistor R21 and a resistor R46, the cathode of the diode D6 is connected with the emitter of the triode Q5 through the resistor R21, and the collector of the triode Q5 is connected with the anode of the diode D6 through the resistor R46;

Specifically, firstly, capacitors C21 and C26 are respectively connected to the collector of the transistor Q12, the capacitors C21 and C26 are connected in parallel, the capacitance of the capacitor C21 is 100 nanofarads, the capacitance of the capacitor C26 is 10 microfarads, and the capacitors C21 and C26 are used as power supply filters; the emitter of the triode Q12 is also connected with a resistor R47, the resistance of the resistor R47 is 300 Ω, and the resistors R47 and R48 protect the voltage signal;

when the data processing chip is used, data sent by the data processing chip pass through the resistor R39 and the triode Q6, the triode Q6 is conducted to enable the diode D5 to be conducted, the data are emitted through infrared rays and received by the diode D6, and then the data are transmitted to the LORA transmission module 4 through waveform processing;

thirdly, the resistor R21 is used for limiting current, the resistors R45 and R46 are used for dividing voltage, and the resistor R40 is used for protecting the triodes Q11 and Q12;

repeatedly, because the acquisition circuit for measuring the voltage and the LORA transmission circuit for sending data can not share one voltage, the isolation processing is needed, and the voltmeter well solves the problem of data transmission through the cooperation of the infrared sending unit and the receiving unit.

In an embodiment of the voltmeter, the LORA transmission module 4 includes a transmission chip, an eighth pin of the transmission chip is connected to the infrared transmission module 3, and a second pin of the transmission chip is connected to the antenna base through an inductor L2. The type of the transmission chip is RHF0M 003.

Specifically, first, the inductance L2 functions to reduce signal interference;

secondly, an inductor FB1 and a capacitor C6 are connected to the tenth pin of the transmission chip and used for filtering the power supply.

This voltmeter is installed on needing measuring circuit to electric connection, then connect 5V mains operated through USB, LORA transmission module 4 in the voltmeter is automatic to be networked and is connected the communication, when measuring out voltage data, and acquisition circuit transmits the data of gathering to LORA transmission circuit through infrared emission circuit, then sends to the LORA gateway through the antenna pedestal again, through the LORA basic station at last, transmits to high in the clouds.

The utility model has the advantages of simple and reasonable structure, design benefit to need not through manual operation, connect the power when this voltmeter, LORA transmission module 4 is connected automatic network deployment, and this voltmeter still has transmission distance and keeps away, advantages such as interference killing feature is strong.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner. Those skilled in the art can make numerous possible variations and modifications to the present teachings, or modify equivalent embodiments to equivalent variations, without departing from the scope of the present teachings, using the methods and techniques disclosed above. Therefore, all equivalent changes made according to the shape, structure and principle of the present invention without departing from the technical scheme of the present invention shall be covered by the protection scope of the present invention.

Claims

1. A voltmeter, comprising: the voltage data acquisition module comprises an acquisition chip and an acquisition circuit connected to the forty-th pin of the acquisition chip, the acquisition circuit comprises a thermistor PTC1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R24, a resistor R27, a resistor R30, a resistor R37, an inductor L1, a capacitor C1, a piezoresistor SG1 and a resistor SG2, the inductor L1, the resistor R4, the resistor R3, the resistor R2 and the resistor R1 are sequentially connected in series to form a first branch, the piezoresistor SG1 and the resistor SG2 are sequentially connected in series to form a second branch, the resistors R37, R31, the resistor R30, the resistor R27 and the resistor R24 are sequentially connected in series to form a third branch, the first branch, the second branch and the third branch are connected in parallel, and an acquisition voltage input end V1 is connected with the first branch, the second branch and the left ends of the first branch through the resistor 1 and the second branch, the capacitor C1 is disposed between the first branch and the second branch.

2. The voltmeter according to claim 1, wherein the data processing module comprises a data processing chip, a thirtieth pin and a thirty-first pin of the data processing chip are respectively connected to a twenty-first pin and a twenty-second pin of the collecting chip, and a twelfth pin of the data processing chip is connected to the infrared transmission module.

3. The voltmeter according to claim 2, wherein the data processing chip has a model number of HC32L130J8 TA.

4. The voltmeter according to claim 1, wherein the infrared transmission module comprises a transmitting unit and a receiving unit communicating with the transmitting unit via an infrared signal connection, the transmitting unit comprises a transmitting circuit, the transmitting circuit comprises a resistor R39, a transistor Q6, and a diode D5, a base of the transistor Q6 is connected to the data processing module via the resistor R39, and a collector of the transistor Q6 is connected to an anode of the diode D5.

5. The voltmeter according to claim 4, wherein the receiving unit comprises a receiving circuit, the receiving circuit comprises a first conducting unit and a second conducting unit, the first conducting unit comprises a diode D6, a transistor Q5, resistors R21 and R46, a cathode of the diode D6 is connected to an emitter of the transistor Q5 through the resistor R21, and a collector of the transistor Q5 is connected to an anode of the diode D6 through the resistor R46;

6. The voltmeter of claim 1, wherein the LORA transmission module comprises a transmission chip, an eighth pin of the transmission chip is connected to the infrared transmission module, and a second pin of the transmission chip is connected to the antenna base through an inductor L2.

7. The voltmeter of claim 6, wherein the type of said transmitting chip is RHF0M 003.