Information miner lamp system

Abstract

The invention provides an information miner lamp system, and belongs to the technical field of miner lamps. The first input end of the latch unit U7 is electrically connected with the first output end of the MCU control unit U1; the input end of the electronic switch unit U6 is electrically connected with the output end of the latch unit U7; a grid electrode G of a field effect transistor Q6 of the light source control unit is electrically connected with a second output end of the MCU control unit U1; a grid electrode G of a field effect transistor Q2 of the light source control unit is electrically connected with a drain electrode D of the field effect transistor Q6; the same-direction end and the reverse-direction end of the voltage comparison unit U4 are electrically connected with the drain electrode D and the source electrode S of the field effect transistor Q2 respectively, and the second input end of the latch unit U7 is electrically connected with the output end of the voltage comparison unit U4; and the peripheral circuit unit is electrically connected with the output end of the electronic switch unit U6. According to the invention, the energy loss can be reduced, so that the working time of the UWB positioning unit is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of mining lamps, and in particular relates to an information mining lamp system. Background Art

[0002] The standard working time of a mining lamp in an intrinsically safe information mining lamp system is generally 11 hours after a single full charge. Since the UWB positioning unit of the intrinsically safe information mining lamp system is a necessary circuit, it is required that the UWB positioning unit can continue to work for 199 hours after the mining lamp is fully charged. In order to meet this requirement as much as possible, some people have reduced the power consumption of the information mining lamp board through the low-power modes such as sleep and hibernation of the internal chip of the system to ensure the standby time of the UWB positioning unit.

[0003] However, if the information mining lamp system enters sleep mode through the MCU processing unit to achieve the purpose of low power mode, then, except for the UWB positioning unit circuit, the total working current of other functional chips is about 10mA (under lithium battery power supply), and the cooperation of peripheral circuits is required to achieve specific functions or meet chip working conditions. The electronic components that make up these peripheral circuits will always be in a state of energy consumption, and the working current will reach the milliampere level, which is at the same level as the UWB positioning unit, which will inevitably cause the loss of energy of the mining lamp power supply battery, so it cannot be ignored. In addition, in some cases, due to technical limitations or design complexity, it may be difficult for manufacturers to implement low power mode in chips. If there are application scenarios for such chips, existing technologies will not be able to achieve low power mode.

[0004] In summary, in the prior art, the MCU processing unit of some chips does not have the function of entering the sleep mode, or has the sleep function, but the peripheral circuit generates energy loss in this mode, resulting in the UWB positioning unit being unable to meet the usage requirements. Summary of the invention

[0005] In order to overcome the above-mentioned disadvantage of excessive energy loss in the prior art, the present invention provides an information mining lamp system.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] When the information mining lamp is in working state, the MCU control unit U1, latch unit U7, electronic switch unit U6 and UWB positioning unit of the information mining lamp system are electrically connected to the information mining lamp power supply battery through the DC / DC voltage conversion circuit unit; the voltage comparison unit and the light source control unit are both electrically connected to the information mining lamp power supply battery;

[0008] The first input end of the latch unit U7 is electrically connected to the first output end of the MCU control unit U1; the input end of the electronic switch unit U6 is electrically connected to the output end of the latch unit U7;

[0009] The gate G of the field effect transistor Q6 of the light source control unit is electrically connected to the second output terminal of the MCU control unit U1, and the gate G of the field effect transistor Q2 of the light source control unit is electrically connected to the drain D of the field effect transistor Q6;

[0010] The same direction end and the reverse direction end of the voltage comparison unit U4 are electrically connected to the drain D and the source S of the field effect transistor Q2 respectively, and the second input end of the latch unit U7 is electrically connected to the output end of the voltage comparison unit U4;

[0011] It also includes a peripheral circuit unit, which is electrically connected to the output end of the electronic switch unit U6.

[0012] Preferably, the first input end of the latch unit U7 includes pin No. 1 LE and pin No. 3 D of the latch unit U7, and the first output end of the MCU control unit U1 includes pin No. 13 GPIO14 and pin No. 24 GPIO2 of the MCU control unit U1; pin No. 1 LE of the latch unit U7 is electrically connected to pin No. 13 GPIO14 of the MCU control unit U1; pin No. 3 D of the latch unit U7 is electrically connected to pin No. 24 GPIO2 of the MCU control unit U1; the input end No. 4 enable pin EN of the electronic switch unit U6 is electrically connected to the output end No. 4 pin Q of the latch unit U7 through a diode D6;

[0013] The gate G of the field effect transistor Q6 of the light source control unit is electrically connected to the second output terminal No. 11 pin GPIO26 of the MCU control unit U1, and the gate G of the field effect transistor Q2 of the light source control unit is electrically connected to the drain D of the field effect transistor Q6;

[0014] The same direction end pin 3 +INA and the reverse direction end pin 2 -INA of the voltage comparison unit U4 are electrically connected to the drain D and the source S of the field effect transistor Q2 respectively, and the second input end pin 6 OE# of the latch unit U7 is electrically connected to the output end pin 1 OUTA of the voltage comparison unit U4 through the diode D8;

[0015] The peripheral circuit unit is electrically connected to the output terminal pin No. 1 OUT of the electronic switch unit U6.

[0016] Preferably, pin No. 1 LE of the latch unit U7 is electrically connected to the reference ground GND_MCU of the information mining lamp system through a resistor R34.

[0017] Preferably, a resistor R35 is provided between the No. 4 enable pin EN of the electronic switch unit U6 and the 3.3V level power supply system of the information mining lamp.

[0018] Preferably, a diode D5 is further included, and the diode D5 is arranged between the No. 3 pin +INA of the voltage comparison unit U4 and the drain D of the field effect transistor Q2.

[0019] Preferably, the DC / DC voltage conversion circuit unit is used to convert the voltage of the information mining lamp power supply battery into a 3.3V voltage.

[0020] Preferably, the peripheral circuit unit includes a current acquisition circuit, a posture detection circuit, a screen display circuit and a motor buzzer unit circuit.

[0021] Preferably, the light source control unit includes a mining lamp.

[0022] Preferably, the field effect transistor Q6 is an N-type MOS transistor, and the field effect transistor Q2 is a P-type MOS transistor.

[0023] The information mining lamp system provided by the present invention has the following beneficial effects:

[0024] The present invention sends relevant instructions through the MCU control unit U1, which can lower the voltage of the first output end of the MCU control unit, thereby lowering the voltage of the input end of the latch unit U7, so that the output result of the latch unit U7 is a low level, and the output state is latched; at the same time, by transmitting this output state to the input end of the electronic switch unit U6, the input end of the electronic switch unit U6 can be pulled to a low level by the latch unit U7, and then the output function of the electronic switch unit U6 is turned off, so that the circuit units such as the peripheral circuit units mounted under the electronic switch unit U6 lose power, and only the power supply of the voltage comparison unit U4, the latch unit U7, and the UWB positioning unit is retained, so as to achieve the purpose of reducing power consumption.

[0025] In addition, the present invention can make the field effect transistor Q6 no longer controlled by the MCU control unit U1 by de-energizing the MCU control unit U1, so that the gate G of Q2 of the light source control unit is pulled up to a high level, and the gate-source voltage difference V GS The turn-on threshold voltage of the MOS tube cannot be reached, so that Q2 works in the cut-off region, thereby forcibly turning off the miner's lamp light source to reduce the power consumption of the miner's lamp light source.

[0026] The present invention ensures that the light source of the information miner's lamp is not lit by turning off the unnecessary circuits (except the circuits of the positioning system) in the low-power mode through the logical combination of passive components, so as to avoid lighting the light source of the miner's lamp in the low-power mode and occupying the energy of the necessary circuits. By cutting off the unnecessary circuits, the energy consumption of the information miner's lamp system will be significantly reduced, thereby greatly extending the working time of the UWB positioning unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiment of the present invention and its design scheme, the following briefly introduces the drawings required for this embodiment. The drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 This is the power supply relationship block diagram of the internal circuit units of this mining lamp system;

[0029] Figure 2 This is the control signal association block diagram of the internal circuit unit of this mining lamp system;

[0030] Figure 3 It is the MCU control circuit unit of this system;

[0031] Figure 4 is a circuit diagram of a latch unit;

[0032] Figure 5 is a circuit diagram of an electronic switch unit;

[0033] Figure 6 A circuit diagram of a light source control unit;

[0034] Figure 7 is a circuit diagram of a voltage comparison unit;

[0035] Figure 8 Circuit diagram for switching between battery and USB power supply modes. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the technical solution of the present invention and implement it, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the scope of protection of the present invention.

[0037] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the technical solutions of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] In addition, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified or limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. In the description of the present invention, unless otherwise specified, "plurality" means two or more, which will not be described in detail here.

[0039] Example

[0040] The present invention provides an information mining lamp system, specifically Figure 1-Figure 8 As shown, when the information miner's lamp is in working state, the MCU control unit U1, latch unit U7, electronic switch unit U6 and UWB positioning unit of the information miner's lamp system are electrically connected to the information miner's lamp power supply battery through the DC / DC voltage conversion circuit unit; the voltage comparison unit and the light source control unit are both electrically connected to the information miner's lamp power supply battery; the DC / DC voltage conversion circuit unit is used to convert the voltage of the information miner's lamp power supply battery into a 3.3V voltage. The first input end of the latch unit U7 is electrically connected to the first output end of the MCU control unit U1; the input end of the electronic switch unit U6 is electrically connected to the output end of the latch unit U7; the gate G of the field effect transistor Q6 of the light source control unit is electrically connected to the second output end of the MCU control unit U1, and the gate G of the field effect transistor Q2 of the light source control unit is electrically connected to the drain D of the field effect transistor Q6; the same direction end and the reverse direction end of the voltage comparison unit U4 are electrically connected to the drain D and the source S of the field effect transistor Q2, respectively, and the second input end of the latch unit U7 is electrically connected to the output end of the voltage comparison unit U4; and also includes a peripheral circuit unit, which is electrically connected to the output end of the electronic switch unit U6.

[0041] Specifically, the first input end of the latch unit U7 includes pin 1 LE and pin 3 D of the latch unit U7, and the first output end of the MCU control unit U1 includes pin 13 GPIO14 and pin 24 GPIO2 of the MCU control unit U1; pin 1 LE of the latch unit U7 is electrically connected to pin 13 GPIO14 of the MCU control unit U1; at the same time, pin LE is electrically connected to the reference ground GND_MCU of the information miner's lamp system through resistor R34, and pin 3 D of the latch unit U7 is electrically connected to pin 24 GPIO2 of the MCU control unit U1; enable pin 4 EN of the electronic switch unit U6 is electrically connected to pin 4 Q of the latch unit U7 through diode D6, and diode D6 plays the role of level signal conversion, thereby achieving the purpose of protecting pin 4 EN of the electronic switch U6.

[0042] The gate G of the field effect transistor Q6 of the light source control unit is electrically connected to the second output terminal pin 11 GPIO26 of the MCU control unit U1, the gate G of the field effect transistor Q2 of the light source control unit is electrically connected to the drain D of the field effect transistor Q6, the same direction terminal pin 3 +INA and the reverse direction terminal pin 2 -INA of the voltage comparison unit U4 are respectively electrically connected to the drain D and the source S of the field effect transistor Q2, and the second input terminal pin 6 OE# of the latch unit U7 is electrically connected to the output terminal pin 1 OUTA of the voltage comparison unit through a diode D8; the pin withstand voltage value of the latch unit U7 is relatively low (maximum 5.5V), and under specific working conditions, the voltage output by pin 1 OUTA of the voltage comparison power supply U4 will be higher than the withstand voltage value of pin 6 OE# of U7, which cannot avoid the latch unit U7 from being broken down and damaged. A diode D8 is added here and used in conjunction with a pull-up resistor R39 to convert the output of the voltage comparison unit U4 into a signal within a safe voltage of 0V-3.3V, and then provide it to the latch unit U7 for use.

[0043] The peripheral circuit unit is also included, and the peripheral circuit unit is electrically connected to the output terminal pin 1 OUT of the electronic switch unit U6. Specifically, the peripheral circuit unit includes a current acquisition circuit, a posture detection circuit, a screen display circuit, and a motor buzzer unit circuit. The peripheral circuit power supply is a necessary unit of the mining lamp system, but does not affect the realization of the function of the present invention, so it is not described in detail.

[0044] In this embodiment, the pin LE No. 1 of the latch unit U7 is also electrically connected to the reference ground GND_MCU of the information mining lamp system through the resistor R34. The resistor R34 is a weak pull-down resistor. When the MCU control unit U1 loses power, GPIO2 and GPIO14 cannot normally output high and low levels. At this time, the pin LE No. 1 of the latch unit U7 can be pulled down to the system reference ground through the resistor R34, presenting a low level, thereby locking and maintaining the output state of the pin Q No. 4 of the latch unit U7, and then controlling the working state of the electronic switch unit U6.

[0045] A resistor R35 is arranged between the enable pin No. 4 EN of the electronic switch unit U6 and the 3.3V level power supply system of the information mining lamp. The resistor R35 is a pull-up resistor. When the output state D_RESULT of the pin No. 4 Q of the latch unit U7 is a high level (H) or a high impedance state (Hi-Z), the enable pin No. 4 EN of the electronic switch unit U6 can be pulled up to a certain high level state (H), so that the pin No. 1 of the electronic switch unit U6 can output.

[0046] In addition, a diode D5 is included. The diode D5 is arranged between the No. 3 pin +INA of the voltage comparison unit U4 and the drain D of the field effect transistor Q2. The diode D5 should have a small forward conduction voltage drop, which should be lower than the forward conduction voltage drop of the body diode between the drain D and the source S of the field effect transistor Q2. A Schottky diode can be selected. In this mining lamp system, the field effect transistor Q2 only works in the cut-off region and the saturation region. When the field effect transistor Q2 operates in the cut-off region and the drain D of the field effect transistor Q2 has a certain voltage (generally the charging voltage is around 6V), a certain voltage difference will be generated between the drain D and the source S of the field effect transistor Q2 due to the existence of the Q2 body diode (the voltage difference of the field effect transistor Q2 selected in this system is about 0.7V), and the forward conduction voltage of the selected diode D5 is less than the voltage difference between the drain D and the source S of the field effect transistor Q2 at this time. Therefore, the signal at pin 3 +INA (determined by the drain D voltage of the field effect transistor Q2 and the forward conduction voltage of the diode D5) of the voltage comparison unit U4 is higher than the signal at pin 2 -INA (determined by the source S voltage of the field effect transistor Q2), so that the output pin 1 OUTA of the voltage comparison unit U4 outputs a high-level signal and provides it to the latch unit U7 for use. When the field effect transistor Q2 operates in the saturation region, the drain D and source S of the field effect transistor Q2 are fully turned on, and there is almost no voltage difference. At this time, after passing through the diode D5, the signal at pin 3 +INA (determined by the drain D voltage of the field effect transistor Q2 and the forward conduction voltage of the diode D5) of the voltage comparison unit U4 is lower than the signal at pin 2 -INA (determined by the source S voltage of the field effect transistor Q2). In this way, the output pin 1 OUTA of the voltage comparison unit U4 outputs a low-level signal and provides it to the latch unit U7 for use.

[0047] In this embodiment, the light source control unit includes a mining lamp. Among them, the field effect transistor Q6 is an N-type MOS tube, and the field effect transistor Q2 is a P-type MOS tube. The gate G of the field effect transistor Q6 is electrically connected to the pin No. 11 GPIO26 of the MCU control unit U1, and the drain D of the field effect transistor Q6 is electrically connected to the gate G of the field effect transistor Q2. The drain D of the field effect transistor Q6 is electrically connected to the mining lamp power supply battery through the resistor R40. When the pin No. 11 GPIO26 of the MCU control unit U1 is at a low level or there is no control signal (that is, the MCU control unit U1 is powered off), the field effect transistor Q6 can only work in the cut-off area. After the pull-up action of the resistor R40, the voltage difference between the gate G and the source S of the field effect transistor Q2 fails to reach the turn-on voltage of the field effect transistor Q2, so that the field effect transistor Q2 works in the cut-off area. The field effect transistor Q2 is designed in the power supply circuit of the mining lamp light source module, so as to achieve the purpose of shutting down the mining lamp light source module, and can also ensure that the MCU control unit U1 is powered off. In this case, the light source module is turned off to achieve the purpose of saving the battery power of the miner's lamp as much as possible; when the No. 11 pin GPIO26 of the MCU control unit U1 is at a high level, the field effect transistor Q6 operates in the saturation area, and the gate G level of the field effect transistor Q2 is pulled down to the reference ground (zero potential), so that the voltage difference between the gate G and the source S of the field effect transistor Q2 reaches the turn-on voltage of the field effect transistor Q2, so that the field effect transistor Q2 operates in the saturation area, and the field effect transistor Q2 is designed in the power supply circuit of the miner's lamp light source module, thereby achieving the purpose of powering the miner's lamp light source module.

[0048] The information mining lamp system of the present invention has real-time judgment logic for ultra-low power consumption mode. In the normal working mode, after the information mining lamp detects the triggering conditions of the ultra-low power consumption mode, it enters the ultra-low power consumption mode, turns off non-essential circuits such as the peripheral circuit unit and the MCU control unit U1, and only retains the necessary circuits of the UWB positioning unit to reduce the power consumption of the entire system as much as possible. Only when the mining lamp performs charging or program burning, the information mining lamp system will enter the normal working mode again and wake up functional modules such as the peripheral circuit unit and the MCU control unit U1. The specific working principle of the information mining lamp system of the present invention is as follows:

[0049] This information mining lamp system monitors the remaining power of the information mining lamp power supply battery in real time. When the remaining power is lower than the set threshold, it will enter the ultra-low power consumption mode. When the mining lamp enters the ultra-low power consumption mode, the MCU control unit U1 immediately issues relevant instructions to pull down the pin GPIO2 (i.e. the signal of the latch pin D) and the pin GPIO14 (i.e. the signal of the latch pin LE) of the MCU control unit U1, so that the values ​​of the pin D and the pin LE of the latch unit U7 (model SN74LVC1G373) are both low level (marked as "L"). By querying the latch unit U7 function table (see Table 1, where L represents low level, H represents high level, X represents high and low levels, Q0 represents that the latch latches the output state, that is, the output Q maintains the state when the pin LE level changes from high to low, and Hi-Z represents that Q is in high impedance state), it can be known that at this time, the latch

[0050] Table 1 Latch unit U7 function table

[0051]

[0052] The output result of the pin Q of the electronic switch unit U7 is low level, and this output state is latched, and this output state is passed to the enable pin EN of the electronic switch unit U6 (model SY6280AAAC). The enable pin EN of the electronic switch unit U6 is pulled to a low level by the latch unit U7, and then its own output function is turned off, so that the current acquisition circuit, posture detection circuit, screen display circuit, motor buzzer unit circuit, MCU control unit U1 and other circuit units in the peripheral circuit unit mounted under the electronic switch unit U6 lose power, and only the power supply of the voltage comparison unit, latch unit U7, and UWB positioning unit is retained, so as to achieve the purpose of ultra-low power consumption operation of the system. The energy consumption of the voltage comparison unit and the latch unit U7 is extremely low, which can be ignored compared with the energy consumption of the UWB positioning unit (about 30mW), which is equivalent to that in the ultra-low power consumption mode, only the UWB positioning unit of this information mining lamp system has energy consumption. In addition, in the ultra-low power consumption mode of this system, the MCU control unit U1 loses power, and the field effect transistor Q6 is no longer controlled by the MCU control unit U1. At this time, the gate G of Q2 (model AP4407C) of the light source control unit is pulled up to a high level through the resistor R40. The gate-source voltage difference VGS of Q2 cannot reach the turn-on threshold voltage of the MOS tube, so that Q2 works in the cut-off area, achieving the purpose of forcibly turning off the mining lamp light source. Be careful to prevent the situation where a large amount of battery energy is consumed when the light source is turned on (the power consumption of the main light source is about 25 times that of the UWB positioning unit).

[0053] When charging or burning programs for the mining lamp, this information mining lamp system will exit the ultra-low power consumption mode and switch to the normal working mode. Taking the charging of the mining lamp as an example, when charging, first, Q2 (model AP4407C) works in the cut-off area, there is a body diode between the drain D and the source S, and the forward conduction voltage drop from D to S is about 0.7V, and this voltage drop must be higher than the forward conduction voltage of the diode D5 in the voltage comparison unit (D5 selects a Schottky diode, and the forward conduction voltage is 0.45V-0.5V). The Q2 drain voltage (marked as VOLTAGE_D) and source voltage (marked as VOLTAGE_S) are sent to the voltage comparison unit (not smooth). The body diode of this Q2 has a certain current carrying capacity, which is sufficient to support the normal operation of this information mining lamp system (including but not limited to MCU control unit U1, etc.) in a short time. When the voltage comparison unit U4 (model LM393) receives a voltage signal at the same direction end (receiving Q2 drain voltage VOLTAGE_D) and the reverse direction end (receiving Q2 source voltage VOLTAGE_S), the voltage comparison unit U4's same direction end is greater than the reverse direction end voltage, so that the voltage comparison unit U4 output result OUTA is high (marked as "H"), and this high level is passed to the output valid pin OE# of the latch unit U7. The output valid pin OE# of the latch unit U7 (model SN74LVC1G373) is pulled high by the output of the voltage comparison unit U4, which will change the state of the output pin Q of the latch unit U7 to high impedance Q0 (as can be seen from Table 1). At this time, the enable pin EN of the electronic switch unit U6 changes from low level to high level under the action of the pull-up resistor R35, so that the electronic switch unit U6 is turned on and works, and the power supply circuit of the hardware circuits such as the current acquisition circuit, the posture detection circuit, the screen display circuit, the motor buzzer unit circuit, and the MCU control unit U1 is restored. After receiving power, the MCU control unit U1 starts to work. Through the internal program, the CMD_LAMP of the control Q6 becomes high level, so that Q2 works in the saturation area, and the drain D and source S of Q2 are fully conductive, and the internal resistance does not exceed 20 milliohms, which can ensure that the charging current passes through Q2 smoothly, and the purpose of charging with a large current (setting the charging current to 1A) is achieved. However, at this time, the voltage difference between the drain and the gate of Q2 will be almost 0V. At this time, in the voltage comparison unit, due to the presence of diode D5, the voltage of the same-direction input end of the voltage comparison unit U4 is always lower than the voltage of the reverse input end, which will make the output result of the voltage comparison unit U4 a low level. After the output pin OE# of the latch unit U7 (model SN74LVC1G373) receives the low-level signal of the voltage comparison unit U4, the output pin Q is activated and can be output according to Table 1. At this time, the MCU control unit U1 only needs to pull up the pin LE of the latch unit U7 through the program logic, which will make the output pin Q of the latch unit U7 generate a high level and maintain this state.After the electronic switch unit U6 receives the high level signal from the output pin Q of the latch unit U7, it pulls up the enable pin EN of the electronic switch unit U6, so that U6 is turned on and maintained, and the unit circuit that stops supplying power due to entering the ultra-low power mode is restored. So far, the process of entering the ultra-low power mode and restoring to the normal working mode of this information mining lamp is completed. With the same working principle, when this system performs program burning operation in the ultra-low power mode, a stable voltage difference will be generated between the two poles of the D2 Schottky diode (at. Figure 8 The voltage difference is sent to the voltage comparison unit for processing, which is consistent with the principle of the charging process. It can also achieve the purpose of turning on the electronic switch unit U6 (the pin EN of the electronic switch unit U6 is pulled high), and the information mining lamp system can enter the normal working mode. Figure 8 The circuit switches between USB power supply (nominal voltage is 5V, indicated by VCC_USB_SCREEM in the figure) and battery power supply (nominal voltage is 3.7V, indicated by VCC_BOARD in the figure). The working principle is that the mining lamp power supply battery is the main power supply form. When the USB power supply takes effect, the USB voltage is higher than the battery voltage, which will make the MOS tube Q1 and the diode D3 work in the cut-off area, thereby closing the battery power supply path and switching to USB power supply mode.

[0054] The present invention has the following advantages:

[0055] 1) When the MCU detects the conditions that trigger the ultra-low power consumption threshold, it will actively cut off the power supply circuits of the current acquisition circuit, attitude detection circuit, screen display circuit, motor buzzer unit circuit, MCU control unit, light source control unit and other hardware parts, and keep the action of cutting off the circuit until the miner's lamp is charged or the program is burned, then it will exit the ultra-low power consumption mode. This solution is suitable for the case where the chip has no low power consumption modes such as sleep and hibernation.

[0056] 2) After turning off non-essential circuits (except for the positioning system) in low-power mode, ensure that the light source of the information mining lamp is not lit through the logical combination of passive components, so as to avoid lighting the mining lamp light source in low-power mode and occupying the energy of the necessary circuits.

[0057] 3) In the ultra-low power consumption mode, the necessary circuits of this information mining lamp system only include the UWB positioning unit, and the working current is about 10mA (powered by lithium battery). If the MCU enters the sleep mode (the current consumed by the MCU single module in this mode is at the uA level), the working current of its power supply unit and peripheral circuit unit will also reach the milliampere level, which is at the same level as the energy consumption of the positioning system and cannot be ignored. Therefore, by cutting off the unnecessary circuits, the energy consumption of this information mining lamp system will be significantly reduced, thereby greatly extending the working time of the positioning system.

[0058] 4) This information mining lamp system enters ultra-low power consumption mode completely relying on hardware circuits. When the mining lamp is charged or the program is burned by wire, it will automatically exit the ultra-low power consumption mode and switch to normal working mode to ensure the use of mining lamp charging and program burning functions.

[0059] 5) This information mining lamp system uses a built-in electronic switch to cut off the power supply circuit of non-essential circuits in ultra-low power consumption mode, directly eliminating the power consumption of some peripheral passive components.

[0060] The above embodiments are only preferred specific implementation methods of the present invention, and the protection scope of the present invention is not limited thereto. Any simple changes or equivalent replacements of the technical solutions that can be obviously obtained by any technician familiar with the field within the technical scope disclosed in the present invention belong to the protection scope of the present invention.

Claims

1. An information mining lamp system, characterized in that: When the information mining lamp is in working state, the MCU control unit U1, latch unit U7, electronic switch unit U6 and UWB positioning unit of the information mining lamp system are electrically connected to the information mining lamp power supply battery through the DC / DC voltage conversion circuit unit; the voltage comparison unit and the light source control unit are both electrically connected to the information mining lamp power supply battery; The first input end of the latch unit U7 is electrically connected to the first output end of the MCU control unit U1; the input end of the electronic switch unit U6 is electrically connected to the output end of the latch unit U7; The gate G of the field effect transistor Q6 of the light source control unit is electrically connected to the second output terminal of the MCU control unit U1, and the gate G of the field effect transistor Q2 of the light source control unit is electrically connected to the drain D of the field effect transistor Q6; The same direction end and the reverse direction end of the voltage comparison unit U4 are electrically connected to the drain D and the source S of the field effect transistor Q2 respectively, and the second input end of the latch unit U7 is electrically connected to the output end of the voltage comparison unit U4; It also includes a peripheral circuit unit, which is electrically connected to the output end of the electronic switch unit U6.

2. The information mining lamp system according to claim 1, characterized in that: The first input end of the latch unit U7 includes pin No. 1 LE and pin No. 3 D of the latch unit U7, and the first output end of the MCU control unit U1 includes pin No. 13 GPIO14 and pin No. 24 GPIO2 of the MCU control unit U1; pin No. 1 LE of the latch unit U7 is electrically connected to pin No. 13 GPIO14 of the MCU control unit U1; pin No. 3 D of the latch unit U7 is electrically connected to pin No. 24 GPIO2 of the MCU control unit U1; the input end No. 4 enable pin EN of the electronic switch unit U6 is electrically connected to the output end No. 4 pin Q of the latch unit U7 through a diode D6; The gate G of the field effect transistor Q6 of the light source control unit is electrically connected to the second output terminal No. 11 pin GPIO26 of the MCU control unit U1, and the gate G of the field effect transistor Q2 of the light source control unit is electrically connected to the drain D of the field effect transistor Q6; The same direction end pin 3 +INA and the reverse direction end pin 2 -INA of the voltage comparison unit U4 are electrically connected to the drain D and the source S of the field effect transistor Q2 respectively, and the second input end pin 6 OE# of the latch unit U7 is electrically connected to the output end pin 1 OUTA of the voltage comparison unit U4 through the diode D8; The peripheral circuit unit is electrically connected to the output terminal pin No. 1 OUT of the electronic switch unit U6.

3. The information mining lamp system according to claim 2, characterized in that: Pin No. 1 LE of the latch unit U7 is electrically connected to the reference ground GND_MCU of the information mining lamp system through a resistor R34.

4. The information mining lamp system according to claim 2, characterized in that: A resistor R35 is provided between the No. 4 enable pin EN of the electronic switch unit U6 and the 3.3V level power supply system of the information mining lamp.

5. The information mining lamp system according to claim 2, characterized in that: A diode D5 is also included, and the diode D5 is arranged between the pin No. 3 +INA of the voltage comparison unit U4 and the drain D of the field effect transistor Q2.

6. The information mining lamp system according to claim 1, characterized in that: The DC / DC voltage conversion circuit unit is used to convert the voltage of the information mining lamp power supply battery into a 3.3V voltage.

7. The information mining lamp system according to claim 1, characterized in that: The peripheral circuit unit includes a current acquisition circuit, a posture detection circuit, a screen display circuit and a motor buzzer unit circuit.

8. The information mining lamp system according to claim 1, characterized in that: The light source control unit includes a mining lamp.

9. The information mining lamp system according to claim 1, characterized in that: The field effect transistor Q6 is an N-type MOS transistor, and the field effect transistor Q2 is a P-type MOS transistor.

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