CN214954587U - Wireless remote monitoring device based on DTU - Google Patents
Wireless remote monitoring device based on DTU Download PDFInfo
- Publication number
- CN214954587U CN214954587U CN202120512399.7U CN202120512399U CN214954587U CN 214954587 U CN214954587 U CN 214954587U CN 202120512399 U CN202120512399 U CN 202120512399U CN 214954587 U CN214954587 U CN 214954587U
- Authority
- CN
- China
- Prior art keywords
- capacitor
- chip
- voltage
- circuit
- dtu
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Protection Of Static Devices (AREA)
Abstract
The utility model provides a wireless remote monitoring device based on DTU, which comprises a GPRS chip and a power module, wherein the power module comprises a lithium battery pack, a DC-DC voltage reduction module, a voltage stabilizing circuit and a capacitance filtering circuit; the output end of the lithium battery pack is electrically connected with the power supply end of the GPRS chip through a DC-DC voltage reduction module, a voltage stabilizing circuit and a capacitor filter circuit which are sequentially connected in series. The voltage stabilizing circuit is arranged to stabilize the output voltage of the DC-DC voltage reducing module, so that the fluctuation of the output voltage of the DC-DC voltage reducing module is reduced, and the voltage stability of the power supply end of the GPRS chip is ensured; by arranging the capacitor filter circuit, instantaneous large current is provided for the power supply end of the GPRS chip when the radio frequency of the GPRS chip is in a burst state, the power failure of the GPRS chip is avoided, the continuous work of the GPRS chip is ensured, and the reliability of the GPRS-DTU module is improved.
Description
Technical Field
The utility model relates to a DTU technical field especially relates to wireless remote monitoring device based on DTU.
Background
The GPRS-DTU module is constructed on the basis of a GPRS communication principle and an SIM card, and is used for network communication for transmitting data through a TCP/IP protocol, and the core technology of the GPRS-DTU module is a GRPS communication technology and a TCP/IP communication protocol. The GPRS-DTU module is placed in an industrial field with a complex and severe environment, so that the remote monitoring system has higher requirements on the anti-interference capability and reliability of the GPRS-DTU module. The GPRS-DTU module takes an industrial GPRS chip with strong anti-jamming capability and excellent transmission performance as a main chip of the module, when the GPRS chip is in radio frequency burst, a power supply end of the GPRS chip can cause a voltage drop phenomenon, the current peak value can reach about 2A at the most, the power supply end of the GPRS chip is powered off, a wireless link is broken, the data packet loss rate is increased, and the GPRS chip cannot work continuously and normally. Therefore, in order to solve the above problem, the utility model provides a wireless remote monitoring device based on DTU through addding voltage stabilizing circuit and electric capacity filter circuit, can also provide instantaneous heavy current through electric capacity filter circuit when GPRS chip radio frequency is proruption when guaranteeing that GPRS chip supply voltage has stronger interference ability, avoids the GPRS chip to fall the electricity, improves the reliability of GPRS-DTU module.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a wireless remote monitoring device based on DTU through addding voltage stabilizing circuit and electric capacity filter circuit, can also provide instantaneous heavy current through electric capacity filter circuit when GPRS chip radio frequency is proruption when guaranteeing that GPRS chip supply voltage has stronger interference ability, avoids the GPRS chip to fall the electricity, improves the reliability of GPRS-DTU module.
The technical scheme of the utility model is realized like this: the utility model provides a DTU-based wireless remote monitoring device, which comprises a GPRS chip and a power module, wherein the power module comprises a lithium battery pack, a DC-DC voltage reduction module, a voltage stabilizing circuit and a capacitance filtering circuit;
the output end of the lithium battery pack is electrically connected with the power supply end of the GPRS chip through a DC-DC voltage reduction module, a voltage stabilizing circuit and a capacitor filter circuit which are sequentially connected in series.
On the basis of the technical scheme, preferably, the lithium battery pack provides 12V direct current, and the DC-DC voltage reduction module reduces the 12V direct current to 3.3V direct current.
On the basis of the technical scheme, preferably, the voltage stabilizing circuit comprises resistors R13-R15, a capacitor C7, a capacitor C8, a triode Q2 and a 7805 voltage stabilizer;
the output end of the lithium battery pack is electrically connected with one end of a resistor R13 and the collector of a triode Q2 through a DC-DC voltage reduction module, the other end of the resistor R13 is electrically connected with one end of a capacitor C7, the base of the triode Q2 and the input end of a 7805 voltage stabilizer, the other end of the capacitor C7 is grounded, the emitter of the triode Q2 is electrically connected with one end of a resistor R14, one end of the capacitor C8 and a capacitor filter circuit, the other end of the resistor R14 is electrically connected with the OUT pin of the 7805 voltage stabilizer and one end of the resistor R15, and the other end of the resistor R15 and the other end of the capacitor C8 are grounded.
On the basis of the above technical solution, preferably, the capacitor filter circuit includes a resistor R16, a capacitor C3, a capacitor C4, and a capacitor C9;
an emitter of the triode Q2 is electrically connected with one end of the capacitor C9 and a power supply end of the GPRS chip through the resistor R16, the other end of the capacitor C9 is grounded, and the capacitor C3 and the capacitor C4 are connected in parallel and then connected in parallel at two ends of the capacitor C9.
On the basis of the technical scheme, the device preferably further comprises a SIM card circuit and an electrostatic protection circuit;
the SIM card interface of the GPRS chip is electrically connected with the input end of the SIM card circuit, the output end of the SIM card circuit is grounded, and the electrostatic protection circuit is connected in parallel at two ends of the SIM card circuit.
On the basis of the technical scheme, preferably, the SIM card circuit comprises an SIM-08A chip; the electrostatic protection circuit comprises an SMF05C chip;
the VCC pin, RST pin, CLK pin and I/O pin of the SIM-08A chip are respectively and electrically connected with the SIM card interface of the GPRS chip, and the pins 6, 5, 4 and 1 of the SMF05C chip are respectively and correspondingly connected with the VCC pin, RST pin, CLK pin and I/O pin of the SIM-08A chip.
The utility model discloses a wireless remote monitoring device based on DTU has following beneficial effect for prior art:
(1) the voltage stabilizing circuit is arranged to stabilize the output voltage of the DC-DC voltage reducing module, so that the fluctuation of the output voltage of the DC-DC voltage reducing module is reduced, and the voltage stability of the power supply end of the GPRS chip is ensured;
(2) by arranging the capacitor filter circuit, instantaneous large current is provided for the power supply end of the GPRS chip when the radio frequency of the GPRS chip is in a burst state, the GPRS chip is prevented from being powered off, the continuous work of the GPRS chip is ensured, and the reliability of the GPRS-DTU module is improved;
(3) the static protection circuit is arranged to improve the anti-interference capability of the SIM card, so that the GPRS-DTU module has stronger anti-interference capability in a complicated and severe industrial environment.
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 description of the embodiments or the prior art will be briefly described below, 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 structural diagram of a wireless remote monitoring device based on a DTU of the present invention;
fig. 2 is a circuit diagram of a DC-DC voltage reduction module in the wireless remote monitoring device based on the DTU of the present invention;
fig. 3 is a circuit diagram of a voltage stabilizing circuit and a capacitor filter circuit in the wireless remote monitoring device based on the DTU of the present invention;
fig. 4 is the circuit diagram of the SIM card circuit and the electrostatic protection circuit in the wireless remote monitoring device based on the DTU of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to 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 in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.
As shown in FIG. 1, the utility model discloses a wireless remote monitoring device based on DTU, it includes GPRS chip, power module, SIM card circuit and electrostatic protection circuit.
And the GPRS chip is used as a main chip for DTU data remote transmission. The SIM900A chip selected in this example is stable in performance, high in resistance to disturbance, and has a unique signature in power consumption control, using an industry-standard interface. The SIM900A chip is powered by a single power supply, and the power supply range is between 3.2V and 4.8V.
And the power supply module supplies power to the GPRS chip. When the radio frequency of the GPRS chip is in a burst, the power supply end of the GPRS chip can cause a voltage drop phenomenon, the power supply end of the GPRS chip is powered off, a wireless link is broken, the data packet loss rate is increased, and the GPRS chip cannot continuously and normally work. Therefore, in order to solve the above problem, in this embodiment, a capacitor filter circuit is additionally disposed in the power module, and when the GPRS chip is in a radio frequency burst, a large current generated is absorbed by the capacitor filter circuit, so that the GPRS chip is protected. Preferably, the power module comprises a lithium battery pack, a DC-DC voltage reduction module, a voltage stabilizing circuit and a capacitor filter circuit; the output end of the lithium battery pack is electrically connected with the power supply end of the GPRS chip through a DC-DC voltage reduction module, a voltage stabilizing circuit and a capacitor filter circuit which are sequentially connected in series.
And the lithium battery pack is used for providing 12V direct current. The model is not limited herein.
Since the power supply range of the SIM900A chip is between 3.2V and 4.8V, and the voltage provided by the lithium battery pack is greater than that of the SIM900A chip, voltage reduction is required. In this embodiment, a DC-DC voltage reduction module is used to reduce the 12V DC to 3.3V. Preferably, the DC-DC voltage reduction module may be an MP2303 chip, and a peripheral circuit of the MP2303 chip is shown IN fig. 2, where an IN pin of the MP2303 chip is a voltage input terminal, and an SW thereof is a voltage output terminal; a transient diode is connected IN series with an IN pin, so that the anti-interference capability of the MP2303 chip can be improved, and the DTU module can be deployed IN an industrial field with a complex and severe environment.
Because the output fluctuation of the power supply is large due to the influence factors such as the internal structure and the like, in order to solve the problems, in the embodiment, the voltage stabilizing circuit is arranged behind the DC-DC voltage reduction module to stabilize the output voltage of the DC-DC voltage reduction module, so that the voltage stabilization of the power supply end of the GPRS chip is ensured. Preferably, as shown in fig. 3, the voltage regulator circuit comprises resistors R13-R15, a capacitor C7, a capacitor C8, a triode Q2 and a 7805 voltage regulator; the output end of the lithium battery pack is electrically connected with one end of a resistor R13 and the collector of a triode Q2 through a DC-DC voltage reduction module, the other end of the resistor R13 is electrically connected with one end of a capacitor C7, the base of the triode Q2 and the input end of a 7805 voltage stabilizer, the other end of the capacitor C7 is grounded, the emitter of the triode Q2 is electrically connected with one end of a resistor R14, one end of the capacitor C8 and a capacitor filter circuit, the other end of the resistor R14 is electrically connected with the OUT pin of the 7805 voltage stabilizer and one end of the resistor R15, and the other end of the resistor R15 and the other end of the capacitor C8 are grounded. The resistor R13-R15, the capacitor C7, the capacitor C8, the triode Q2 and the 7805 voltage stabilizer form a common-base-electrode series voltage stabilizing circuit, a +3.3V power supply is generated, and working voltage can be provided for digital circuits such as an SIM900A chip.
And the capacitor filter circuit provides instantaneous large current for the power supply end of the GPRS chip when the GPRS chip is in radio frequency burst, so that the GPRS chip is prevented from power failure. Preferably, as shown in fig. 3, the capacitor filter circuit includes a resistor R16, a capacitor C3, a capacitor C4 and a capacitor C9; specifically, an emitter of the triode Q2 is electrically connected with one end of the capacitor C9 and a power supply end of the GPRS chip through the resistor R16, the other end of the capacitor C9 is grounded, and the capacitor C3 and the capacitor C4 are connected in parallel and then connected in parallel at two ends of the capacitor C9. Wherein, the resistor R16 and the capacitor C9 form an RC filter circuit; the capacitor C4 is a large capacitor, and under normal conditions, the direct-current signal output by the voltage stabilizing circuit charges the capacitor C4; when the GPRS chip is in radio frequency burst, the power supply circuit is used for providing instantaneous strong power consumption current for the SIM900A chip; the capacitor C3 is a small capacitor, and the capacitor C3 is used for filtering interference, so that the anti-surge and anti-static anti-interference capability of the power supply module is improved.
And the SIM card circuit provides an SIM card interface. The SIM card interface of the GPRS chip is electrically connected with the input end of the SIM card circuit, the output end of the SIM card circuit is grounded, and the electrostatic protection circuit is connected in parallel at two ends of the SIM card circuit. As shown in FIG. 4, the SIM card circuitry includes a SIM-08A chip; the VCC pin, RST pin, CLK pin and I/O pin of SIM-08A chip are respectively electrically connected with the SIM card interface of SIM900A chip, the SIM card interface of SIM900A chip is composed of 5 pins, concretely, SIM _ VDD supplies power to the SIM card; SIM _ DATA is a SIM card DATA I/O port; the SIM _ CLK provides a clock for the SIM card; SIM _ RST provides the SIM reset function; SIM _ present provides SIM plug detection, typically floating. The SIM900A chip supports 1.8V and 3.0V SIM cards, the SIM _ VDD pin in the SIM card interface automatically selects matched output voltage according to the type of the SIM card, the current output by the SIM _ VDD pin is 10mA, and the output voltage value is 1.8V +/-10% and 3.0V +/-10% under normal conditions and respectively corresponds to 1.8V and 3.0V SIM cards. Resistors R19 are connected in series between the SIM _ VDD pin and the SIM _ I/O pin respectively to match the impedance between the SIM900A chip and the SIM card.
And the electrostatic protection circuit is used for improving the anti-interference capability of the SIM card. As shown in fig. 4, the electrostatic protection circuit includes an SMF05C chip; pins 6, 5, 4 and 1 of the SMF05C chip are connected with the VCC pin, RST pin, CLK pin and I/O pin of the SIM-08A chip in a one-to-one correspondence. The SMF05C chip is internally integrated with 5 special transient suppression diodes, and has strong transient voltage suppression capability.
The working principle of the embodiment is as follows: the lithium battery pack provides 12V direct current, the 12V direct current is reduced to 3.3V through the DC-DC voltage reduction module, the 3.3V direct current outputs a stable voltage signal after being stabilized by the voltage stabilizing circuit, the voltage signal is input to a power supply end of the GPRS chip, and under a normal condition, the direct current signal output by the voltage stabilizing circuit charges a capacitor C4; when the radio frequency of the GPRS chip is burst, the power supply circuit is used for providing instantaneous strong power consumption current for the GPRS chip and avoiding the power failure of the SIM900A chip.
The beneficial effect of this embodiment does: the voltage stabilizing circuit is arranged to stabilize the output voltage of the DC-DC voltage reducing module, so that the fluctuation of the output voltage of the DC-DC voltage reducing module is reduced, and the voltage stability of the power supply end of the GPRS chip is ensured;
by arranging the capacitor filter circuit, instantaneous large current is provided for the power supply end of the GPRS chip when the radio frequency of the GPRS chip is in a burst state, the GPRS chip is prevented from being powered off, the continuous work of the GPRS chip is ensured, and the reliability of the GPRS-DTU module is improved;
the static protection circuit is arranged to improve the anti-interference capability of the SIM card, so that the GPRS-DTU module has stronger anti-interference capability in a complicated and severe industrial environment.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. Wireless remote monitoring device based on DTU, it includes GPRS chip and power module, its characterized in that: the power supply module comprises a lithium battery pack, a DC-DC voltage reduction module, a voltage stabilizing circuit and a capacitor filter circuit;
the output end of the lithium battery pack is electrically connected with the power supply end of the GPRS chip through a DC-DC voltage reduction module, a voltage stabilizing circuit and a capacitor filter circuit which are sequentially connected in series.
2. The DTU-based wireless remote monitoring device of claim 1, wherein: the lithium battery pack provides 12V direct current, and the DC-DC voltage reduction module reduces the 12V direct current to 3.3V direct current.
3. The DTU-based wireless remote monitoring device of claim 1, wherein: the voltage stabilizing circuit comprises resistors R13-R15, a capacitor C7, a capacitor C8, a triode Q2 and a 7805 voltage stabilizer;
the output end of the lithium battery pack is electrically connected with one end of a resistor R13 and a collector of a triode Q2 through a DC-DC voltage reduction module, the other end of the resistor R13 is electrically connected with one end of a capacitor C7, a base of the triode Q2 and an input end of a 7805 voltage stabilizer, the other end of the capacitor C7 is grounded, an emitter of the triode Q2 is electrically connected with one end of a resistor R14, one end of the capacitor C8 and a capacitor filter circuit, the other end of the resistor R14 is electrically connected with an OUT pin of the 7805 voltage stabilizer and one end of the resistor R15, and the other end of the resistor R15 and the other end of the capacitor C8 are grounded.
4. The DTU-based wireless remote monitoring device of claim 3, wherein: the capacitance filter circuit comprises a resistor R16, a capacitor C3, a capacitor C4 and a capacitor C9;
an emitting electrode of the triode Q2 is electrically connected with one end of the capacitor C9 and a power supply end of the GPRS chip through the resistor R16, the other end of the capacitor C9 is grounded, and the capacitor C3 and the capacitor C4 are connected in parallel and then connected in parallel at two ends of the capacitor C9.
5. The DTU-based wireless remote monitoring device of claim 1, wherein: the device also comprises an SIM card circuit and an electrostatic protection circuit;
the SIM card interface of the GPRS chip is electrically connected with the input end of the SIM card circuit, the output end of the SIM card circuit is grounded, and the electrostatic protection circuit is connected in parallel at two ends of the SIM card circuit.
6. The DTU-based wireless remote monitoring device of claim 5, wherein: the SIM card circuit comprises an SIM-08A chip; the electrostatic protection circuit comprises an SMF05C chip;
the VCC pin, the RST pin, the CLK pin and the I/O pin of the SIM-08A chip are respectively and electrically connected with the SIM card interface of the GPRS chip, and the pins 6, 5, 4 and 1 of the SMF05C chip are respectively and correspondingly connected with the VCC pin, the RST pin, the CLK pin and the I/O pin of the SIM-08A chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120512399.7U CN214954587U (en) | 2021-03-11 | 2021-03-11 | Wireless remote monitoring device based on DTU |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120512399.7U CN214954587U (en) | 2021-03-11 | 2021-03-11 | Wireless remote monitoring device based on DTU |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214954587U true CN214954587U (en) | 2021-11-30 |
Family
ID=79119235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120512399.7U Active CN214954587U (en) | 2021-03-11 | 2021-03-11 | Wireless remote monitoring device based on DTU |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214954587U (en) |
-
2021
- 2021-03-11 CN CN202120512399.7U patent/CN214954587U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201699585U (en) | Novel intelligent voltage stabilizing circuit | |
| CN101256437A (en) | Mainboard voltage feed circuit | |
| CN214954587U (en) | Wireless remote monitoring device based on DTU | |
| CN203368003U (en) | Dual protection device for Boost circuit | |
| CN201986058U (en) | LNB power supply circuit and television | |
| CN101267111A (en) | DC over-voltage protection circuit | |
| CN202906437U (en) | Input undervoltage protection circuit | |
| CN208241642U (en) | A kind of reset circuit based on microcontroller serial port programming | |
| CN109907378B (en) | Electronic cigarette power supply circuit and electronic cigarette | |
| CN209029915U (en) | Current-limiting protection circuit based on inverter load short circuits | |
| CN218102620U (en) | Energy storage control module and energy storage equipment | |
| CN216599410U (en) | Power supply module with input voltage malfunction identification capability | |
| CN218124738U (en) | Remote data acquisition device | |
| CN108712069A (en) | Switching Power Supply input controller | |
| CN216872914U (en) | Low-cost power automatic switching circuit | |
| CN215646227U (en) | Low-power protection circuit and mobile communication device | |
| CN217406164U (en) | Novel current-limiting protection circuit | |
| CN220273518U (en) | Voltage conversion circuit and electronic equipment | |
| CN211089223U (en) | Vehicle navigation MCU power supply circuit capable of improving power-on stability | |
| CN216530646U (en) | Battery with USB reading information | |
| CN219918498U (en) | Power module capable of temporarily storing energy based on isolation | |
| CN216981785U (en) | Dynamic voltage conversion circuit | |
| CN219553889U (en) | Antenna protection device | |
| CN112564680B (en) | Automatic reset circuit for power-on time-delay hardware | |
| CN214756057U (en) | Power control device and intelligent equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |