A low-power power preservation circuit for an intelligent mining helmet based on a lithium battery

Abstract

This application relates to the technical field of lithium batteries, and discloses a low-power power preservation circuit based on a lithium battery intelligent mining cap. The circuit includes a camera daughter board module, a signal splitting chip, a camera main control module, a USB-to-serial port chip, a sensor module, and a power supply module; the camera daughter board module is connected to the signal splitting chip, the signal splitting chip is respectively connected to the camera main control module and the USB-to-serial port chip, the USB-to-serial port chip is connected to and controls the power supply module, the power supply module is connected to and supplies power to the camera main control module, and the camera main control module is connected to the sensor module. The signal splitting chip in this application divides the USB signal from the camera daughter board module into two paths. The first path communicates with the camera main control module, and the second path controls the GPIO of the USB-to-serial port chip. By disconnecting the power supply of the camera main control module through the first path of the USB signal, unnecessary power consumption of the intelligent mining cap is reduced, achieving the purpose of controlling the power supply of the mining cap and low-power power preservation.

Description

Technical Field

[0001] This application relates to the technical field of lithium batteries, and particularly to a low-power power preservation circuit for a lithium battery intelligent mining helmet. Background Art

[0002] A mining helmet, that is, a safety helmet, is a shallow domed hat made of steel or similar materials worn by miners or underground engineering personnel to protect the head. With the development of intelligent electronic products, there has emerged a lithium battery intelligent mining helmet that can be connected to a control system. Connecting a lithium battery intelligent device to a mining helmet requires a mining helmet wire, which is a wire specially designed for coal miners and is used to connect a safety helmet lamp and a storage battery. This kind of cable is used underground in coal mines and has characteristics such as flame retardancy and high temperature resistance. The mining helmet wire is usually manufactured in accordance with the MT / T818.10-1999 standard.

[0003] In a lithium battery intelligent mining helmet, since a special mining helmet wire is required, and the charging and discharging of the intelligent mining helmet are both through the same mining helmet wire, it is impossible to reduce the unnecessary power consumption of the mining helmet by cutting off the power supply of this wire. As a result, the power consumption of the lithium battery intelligent mining helmet is large and it cannot effectively preserve power. Summary of the Invention

[0004] The technical problem to be solved by this application is to provide a low-power power preservation circuit for a lithium battery intelligent mining helmet to achieve the purpose of controlling the power supply of the mining helmet and low-power power preservation.

[0005] To solve the above problems, this application provides a low-power power preservation circuit for a lithium battery intelligent mining helmet, including a camera daughter board module, a signal splitting chip, a camera main control module, a USB to serial port chip, a sensor module, and a power supply module; the camera daughter board module is connected to the signal splitting chip, the signal splitting chip is respectively connected to the camera main control module and the USB to serial port chip, the USB to serial port chip is connected to and controls the power supply module, the power supply module is connected to and supplies power to the camera main control module, and the camera main control module is connected to the sensor module.

[0006] Preferably, the camera daughter board module includes a socket, the first pin of the socket is connected to a power supply, and the second and third pins of the socket are respectively connected to the signal splitting chip.

[0007] Preferably, the first and second pins of the signal splitting chip are respectively connected to the camera daughter board module, the third and fourth pins of the signal splitting chip are respectively connected to the camera main control module, the fifteenth and sixteenth pins of the signal splitting chip are respectively connected to the USB to serial port chip, and the twenty-first pin of the signal splitting chip is connected to a power voltage.

[0008] Preferably, the circuit further includes a first reverse module. The third pin and the fourth pin of the USB-to-serial port chip are respectively connected to the sub-signal chip. The thirteenth pin of the USB-to-serial port chip is connected to the first reverse module, and the first reverse module is connected to the power supply.

[0009] Preferably, the first reverse module includes a sixteenth triode. The base of the sixteenth triode is connected to the thirteenth pin of the USB-to-serial port chip. The collector of the sixteenth triode is connected to the power supply. The emitter of the sixteenth triode is grounded.

[0010] Preferably, the first reverse module further includes a connector. The two ends of the connector are respectively connected to the base and the emitter of the sixteenth triode.

[0011] Preferably, the circuit further includes a second reverse module. The fourteenth pin of the USB-to-serial port chip is connected to the second reverse module, and the second reverse module is connected to the power voltage.

[0012] Preferably, the second reverse module includes a fourth triode. The base of the fourth triode is connected to the fourteenth pin of the USB-to-serial port chip. The collector of the fourth triode is connected to the power voltage. The emitter of the fourth triode is grounded.

[0013] Preferably, the power supply module is connected to the power voltage. The power supply module is connected to the signal transmission interface of the first reverse module, and the power supply module is connected to the camera main control module.

[0014] Preferably, the power supply module includes three power supply circuits. Each power supply circuit is respectively connected to the power voltage. Each power supply circuit is respectively connected to the signal transmission interface of the first reverse module, and each power supply circuit is respectively connected to the camera main control module.

[0015] Compared with the prior art, the present application includes at least one of the following beneficial technical effects:

[0016] Compared with the prior art, an additional sub-signal chip and a USB-to-serial port chip are added in the embodiment of the present application. The sub-signal chip divides the USB signal from the camera daughter board module into two paths. Among them, the first path of USB signal communicates with the camera main control module to control the sensor module. On the other hand, the second path of USB signal controls the switch of the GPIO of the USB-to-serial port chip (GPIO is a general-purpose input / output interface mainly used to connect microcontrollers, embedded systems or other electronic devices to interact with the external world), so as to control the power supply module to work and supply power to the camera main control module. Therefore, the power supply of the camera main control module can be disconnected through the first path of USB signal, reducing the unnecessary power consumption of the intelligent mining cap, so as to achieve the purpose of controlling the power supply of the mining cap and ensuring power with low power consumption. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is the circuit framework diagram of the low-power power preservation circuit for the intelligent mining cap based on a lithium battery in the embodiment of the present application;

[0019] Figure 2 It is the circuit structure schematic diagram of the camera daughter board module in the embodiment of the present application;

[0020] Figure 3 It is the circuit structure schematic diagram of the sub-signal chip in the embodiment of the present application;

[0021] Figure 4 It is the circuit structure schematic diagram of the camera main control module in the embodiment of the present application;

[0022] Figure 5 It is the circuit structure schematic diagram of the USB-to-serial port chip in the embodiment of the present application;

[0023] Figure 6 It is the circuit structure schematic diagram of the first reverse module in the embodiment of the present application;

[0024] Figure 7 It is the circuit structure schematic diagram of the second reverse module in the embodiment of the present application;

[0025] Figure 8 It is the circuit structure schematic diagram of the power supply module in the embodiment of the present application;

[0026] Explanation of the accompanying drawings: J1, socket; J47, connector; U12, signal distribution chip; U21, USB to serial port chip; Q16, sixteenth transistor; Q4, fourth transistor; IO1, signal transmission interface; VCC-HUB, power supply voltage; VBUS, power supply; C304, three hundred and fourth capacitor; C91, ninety-first capacitor; C89, eighty-ninth capacitor; D7, seventh diode; D8, eighth diode; D9, ninth diode; R198, one hundred and ninety-eighth resistor; R199, one hundred and ninety-ninth resistor; R181, one hundred and eighty-first resistor; R182, one hundred and eighty-second resistor; R183, one hundred and eighty-third resistor; C125, one hundred and twenty-fifth capacitor; U9, single-chip microcomputer main control chip. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0028] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0029] It should also be understood that the terms used in this application specification are only for the purpose of describing specific embodiments and are not intended to limit the application. As used in this application specification and the appended claims, the singular forms "a", "an" and "the" are intended to include plural forms unless the context clearly indicates otherwise.

[0030] It should be further understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0031] Please refer to Figure 1 The embodiment of the present application provides a low-power power conservation circuit based on a lithium battery smart mining cap, which is applied to the camera of the lithium battery smart mining cap. Specifically, the circuit includes a camera sub-board module, a signal distribution chip U12, a camera main control module, a USB to serial port chip U21, a sensor module and a power supply module.

[0032] Among them, the USB interface of the camera daughter board module is connected to the USB interface of the signal splitting chip U12 to transmit USB signals. Another USB interface of the signal splitting chip U12 is respectively connected to the USB interface of the camera main control module and the USB to serial port chip U21, thereby splitting the USB signal into two paths. In one path, the USB to serial port chip U21 is connected to and controls the power supply module, the power supply module is connected to the camera main control module, and the power supply module supplies power to the camera main control module; in the other path, the camera main control module is connected to the sensor module.

[0033] Here, compared with the prior art, an additional signal splitting chip U12 and an additional USB to serial port chip U21 are added in the embodiment of the present application. The signal splitting chip U12 splits the USB signal from the camera daughter board module into two paths. Among them, the first path of the USB signal communicates with the camera main control module to control the sensor module. On the other hand, the second path of the USB signal controls the switch of the GPIO of the USB to serial port chip U21 (GPIO is a general-purpose input / output interface mainly used to connect microcontrollers, embedded systems or other electronic devices to interact with the external world), thereby controlling the operation of the power supply module and supplying power to the camera main control module. Therefore, the power supply to the camera main control module can be disconnected through the first path of the USB signal, reducing the unnecessary power consumption of the intelligent mining helmet, so as to achieve the purpose of controlling the power supply of the mining helmet and maintaining power with low power consumption.

[0034] Please refer to Figure 2 , in a specific embodiment, the camera daughter board module includes a socket J1. Among them, the first pin of the socket J1 is connected to the power supply VBUS through the mining helmet wire, and the second and third pins of the socket J1 are respectively connected to the USB interface of the signal splitting chip U12 through the USB interface for communication.

[0035] Furthermore, the camera daughter board module further includes several filter and voltage stabilizing capacitors. In this embodiment, the filter and voltage stabilizing capacitors are set to three, namely the three-hundred-and-fourth capacitor C304, the ninety-first capacitor C91, and the eighty-ninth capacitor C89. Among them, the positive electrode of the three-hundred-and-fourth capacitor C304 is connected to the first pin of the socket J1, and the negative electrode is grounded; one end of the ninety-first capacitor C91 and the eighty-ninth capacitor C89 are respectively connected to the first pin of the socket J1, and the other ends of the ninety-first capacitor C91 and the eighty-ninth capacitor C89 are respectively grounded.

[0036] The camera daughter board module also includes several diodes for anti-static protection. In this embodiment, three diodes are provided, namely the seventh diode D7, the eighth diode D8, and the ninth diode D9. Among them, the two ends of the seventh diode D7 are respectively connected to the third pin of the socket J1 and the ground, the two ends of the eighth diode D8 are respectively connected to the second pin of the socket J1 and the ground, and the two ends of the ninth diode D9 are respectively connected to the first pin of the socket J1 and the ground.

[0037] Please refer to Figure 3 , in a specific embodiment, the first pin and the second pin of the sub-signal chip U12 are respectively connected to the second pin and the third pin of the socket J1 in the camera daughter board module; the third pin and the fourth pin of the sub-signal chip U12 are respectively connected to the camera main control module, the fifteenth pin and the sixteenth pin of the sub-signal chip U12 are respectively connected to the USB-to-serial port chip U21, and the twenty-first pin of the sub-signal chip U12 is connected to the power supply voltage VCC-HUB.

[0038] Please refer to Figures 5 to 7 , in a specific embodiment, the circuit further includes a first reverse module. Among them, the third pin and the fourth pin of the USB-to-serial port chip U21 are respectively connected to the fifteenth pin and the sixteenth pin of the sub-signal chip U12, the thirteenth pin of the USB-to-serial port chip U21 is connected to the first reverse module, and the first reverse module is connected to the power supply VBUS.

[0039] Specifically, the first reverse module includes the sixteenth triode Q16 and the connector J47. Among them, the base of the sixteenth triode Q16 is connected to the thirteenth pin of the USB-to-serial port chip U21, the collector of the sixteenth triode Q16 is connected to the power supply VBUS, the emitter of the sixteenth triode Q16 is grounded, and the two ends of the connector J47 are respectively connected to the base and the emitter of the sixteenth triode Q16. In this embodiment, the connector J47 has a row of two rows of pins and can be used to transmit signals. Especially in the case where multiple rows of pins are required, more signal channels can be provided.

[0040] Furthermore, the first reverse module also includes the one hundred and ninety-eighth resistor R198 and the one hundred and ninety-ninth resistor R199, and their function is series current limiting. Among them, the two ends of the one hundred and ninety-eighth resistor R198 are respectively connected to the thirteenth pin of the USB-to-serial port chip U21 and the base of the sixteenth triode Q16, and the two ends of the one hundred and ninety-ninth resistor R199 are respectively connected to the power supply VBUS and the collector of the sixteenth triode Q16.

[0041] In a specific embodiment, the circuit further includes a second reverse module. Among them, the fourteenth pin of the USB-to-serial chip U21 is connected to the second reverse module, and the second reverse module is connected to the power supply voltage VCC-HUB. The second reverse module includes a fourth triode Q4. The base of the fourth triode Q4 is connected to the fourteenth pin of the USB-to-serial chip U21, the collector of the fourth triode Q4 is connected to the power supply voltage VCC-HUB, and the emitter of the fourth triode Q4 is grounded. Here, the input signal and the output signal of the first reverse module and the second reverse module differ by 180 degrees in phase, which can be used to achieve a specific signal processing effect.

[0042] Furthermore, the second reverse module further includes a one-hundred-and-eighty-first resistor R181, a one-hundred-and-eighty-second resistor R182, a one-hundred-and-eighty-third resistor R183, and a one-hundred-and-twenty-fifth capacitor C125. In this regard, the functions of the one-hundred-and-eighty-first resistor R181, the one-hundred-and-eighty-second resistor R182, and the one-hundred-and-eighty-third resistor R183 are also to limit current in series, and the function of the one-hundred-and-twenty-fifth capacitor C125 is to filter and regulate voltage.

[0043] Among them, the two ends of the one-hundred-and-eighty-first resistor R181 are respectively connected to the power supply voltage VCC-HUB and the collector of the fourth triode Q4. The two ends of the one-hundred-and-eighty-second resistor R182 are respectively connected to the fourteenth pin of the USB-to-serial chip U21 and the base of the fourth triode Q4. The two ends of the one-hundred-and-eighty-third resistor R183 are respectively connected to the fourteenth pin of the USB-to-serial chip U21 and the emitter of the fourth triode Q4. The two ends of the one-hundred-and-twenty-fifth capacitor C125 are respectively connected to the one-hundred-and-eighty-first resistor R181 and the ground.

[0044] Please refer to Figures 4 to 8 , in a specific embodiment, the power supply module is connected to the power supply voltage VCC-HUB, the power supply module is connected to the signal transmission interface IO1 of the first reverse module, and the power supply module is connected to the camera main control module. Thus, the power supply module can supply power to the camera main control module.

[0045] In a specific embodiment, the camera main control module includes a single-chip microcomputer main control chip U9. The fourteenth pin, the sixty-first pin, and the sixty-third pin of the single-chip microcomputer main control chip U9 are respectively connected to a magnetic bead (i.e., FB1, FB4, and FB6). Here, the function of the magnetic bead is to suppress high-frequency noise and spike interference, absorb electrostatic pulses, and improve circuit performance.

[0046] In a specific embodiment, the power supply module includes three power supply circuits. Each power supply circuit is respectively connected to the power supply voltage VCC-HUB, each power supply circuit is respectively connected to the signal transmission interface IO1 of the first reverse module, and each power supply circuit is respectively connected to the camera main control module, so as to supply power to the camera main control module through each power supply circuit. In other embodiments, the power supply module may further include two, four or five power supply circuits. In this embodiment, the three power supply circuits respectively output the 4V power supply VBUS of the socket J1 as voltages of 3.3V, 1.8V, and 0.9V, so that different chip modules can reach their normal operating voltages.

[0047] Since in the circuit block diagram of the existing intelligent mining helmet, the charger charges through the light source board of the mining helmet and charges the lithium battery power supply board of the host through one of the wires VCC of the mining helmet wire. At the same time, this VCC wire is also the power supply wire of the camera secondary board. Therefore, when the main board is powered off, the lithium battery power supply board will still supply power to the camera secondary board through the VCC wire.

[0048] This application adds a sub-signal chip U12 and a USB-to-serial port chip U21, and controls the three power supply circuits of the power supply module through the sixteenth triode Q16 of the first reverse module, so that the power supply module can supply power to the camera main control module. When the main board is powered off or the camera secondary board is not in use, the power supply to the camera main control module by the camera secondary board module is disconnected through the USB signal. Whether the main board is powered on or off, the camera secondary board module can be in a powered-off state, so as to achieve the purpose of controlling the power supply of the intelligent mining helmet and power saving with low power consumption.

[0049] The above is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed in this application can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

1. A low-power power preservation circuit for an intelligent mining helmet based on a lithium battery, characterized in that: It includes a camera daughter board module, a signal splitting chip, a camera main control module, a USB to serial port chip, a sensor module and a power supply module; The camera daughter board module is connected to the signal splitting chip, the signal splitting chip is respectively connected to the camera main control module and the USB to serial port chip, the USB to serial port chip is connected to and controls the power supply module, the power supply module is connected to and supplies power to the camera main control module, and the camera main control module is connected to the sensor module; This circuit further includes a first reverse module. The UD+ pin and UD- pin of the USB to serial port chip are respectively connected to the signal splitting chip, the GPIO1 pin of the USB to serial port chip is connected to the first reverse module, and the first reverse module is connected to the power supply; The first reverse module includes a sixteenth triode. The base of the sixteenth triode is connected to the GPIO1 pin of the USB to serial port chip, the collector of the sixteenth triode is connected to the power supply, and the emitter of the sixteenth triode is grounded; the collector of the sixteenth triode is also connected to the IO1 pin of the power supply module; The DM0 pin and DP0 pin of the signal splitting chip are respectively connected to the camera daughter board module, the DM1 pin and DP1 pin of the signal splitting chip are respectively connected to the camera main control module, the DM2 pin and DP2 pin of the signal splitting chip are respectively connected to the USB to serial port chip, and the DVDD pin of the signal splitting chip is connected to the power voltage.

2. The low-power power preservation circuit of a lithium battery-based intelligent mining helmet according to claim 1, wherein The camera daughter board module includes a socket. The 1 pin of the socket is connected to the power supply, and the 2 pin and 3 pin of the socket are respectively connected to the signal splitting chip.

3. The low-power power preservation circuit of an intelligent mining helmet based on a lithium battery according to claim 1, characterized in that The first reverse module further includes a connector. The two ends of the connector are respectively connected to the base and emitter of the sixteenth triode.

4. The low-power power preservation circuit of an intelligent mining helmet based on a lithium battery according to claim 1, characterized in that, This circuit further includes a second reverse module. The GPIO0 pin of the USB to serial port chip is connected to the second reverse module, and the second reverse module is connected to the power voltage.

5. The low-power power preservation circuit of an intelligent mining helmet based on a lithium battery according to claim 4, wherein, The second reverse module includes a fourth triode. The base of the fourth triode is connected to the GPIO0 pin of the USB to serial port chip, the collector of the fourth triode is connected to the power voltage, and the emitter of the fourth triode is grounded.

6. The low-power power preservation circuit of a smart mining helmet based on a lithium battery according to claim 1, characterized in that, The power supply module is connected to the power voltage, the power supply module is connected to the signal transmission interface of the first reverse module, and the power supply module is connected to the camera main control module.

7. The low-power power preservation circuit of an intelligent mining helmet based on a lithium battery according to claim 6, wherein The power supply module includes three power supply circuits. Each power supply circuit is respectively connected to the power voltage, each power supply circuit is respectively connected to the signal transmission interface of the first reverse module, and each power supply circuit is respectively connected to the camera main control module.

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