Steering induction display circuit, control method and bicycle lamp

Abstract

The invention provides a steering induction display circuit, a control method and a bicycle lamp. The steering induction display circuit comprises a gravity detection module, a control module and a direction display module. Wherein the gravity detection module is used for detecting the gravity direction change during steering and outputting a gravity signal to the control module; the control module is used for outputting a direction display signal to the direction display module according to the gravity signal; and the direction display module is used for lightening according to the direction display signal and rolling in the corresponding direction to perform steering display. The steering direction is confirmed by detecting the gravity direction change caused by the inclination of the bicycle body during steering of the bicycle, so that the light-emitting signal in the direction display module is controlled to roll towards the corresponding steering direction, and the steering signal is provided for the surrounding environment in time; safety accidents caused by the fact that the steering lamp is not turned on in time or not turned on in the riding process are effectively reduced, and the road traffic safety is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bicycle turn signal control, and in particular to a turn signal sensing display circuit, a control method and a bicycle lamp. BACKGROUND

[0002] Bicycle is a common means of transportation for people to travel, and is favored by people because of its convenient use, environmental protection, body exercise and other characteristics.

[0003] However, there are some turn signal systems arranged at the front or rear of the bicycle on the market, which need to install corresponding turn signals on both sides of the bicycle. When in use, the rider usually needs to manually turn on or off the turn signal before turning to inform the surrounding vehicles or pedestrians of the turning intention. However, the installation process of such manually operated turn signal system is complex, and a large number of wired lines are needed to realize the corresponding functions. The rider is prone to neglect or inconvenience in operation, which may result in untimely or inaccurate turn signal and certain safety hazards.

[0004] Therefore, the prior art still needs to be improved and developed. SUMMARY

[0005] In view of the above problems of the prior art, the present application aims to provide a turn signal sensing display circuit, a control method and a bicycle lamp to solve the problem of complex manual operation of the existing bicycle turn signal, which may cause safety hazards due to manual misoperation.

[0006] The technical scheme of the present application is as follows: In a first aspect, the present application provides a turn signal sensing display circuit, which comprises a gravity detection module, a control module and a direction display module. The gravity detection module is connected to the first detection end of the control module, and is used to detect the change of gravity direction when turning and output a gravity signal to the control module. The output end of the control module is connected to the direction display module, and is used to output a direction display signal to the direction display module according to the gravity signal. The direction display module is used to light up and scroll in the corresponding direction according to the direction display signal, and display the turning direction.

[0007] The further setting of the present application further comprises a power module, which is used to provide working voltage. The power module comprises a charging unit, a battery unit and a voltage stabilizing unit. One end of the charging unit is connected to an external power source, and the other end of the charging unit is connected to the battery unit and is used to output a constant current voltage to the battery unit. ​The battery unit is connected with the direction display module and the voltage stabilizing unit respectively, and is used for charging according to the constant current voltage and outputting battery voltage to the direction display module and the voltage stabilizing unit respectively. The voltage stabilizing unit stabilizes the battery voltage and obtains a stabilized working voltage.

[0008] The further setting of the application further comprises a temperature and voltage detection module and a state indication module; wherein the temperature and voltage detection module is connected with the temperature signal detection end of the control module and the voltage signal detection end of the control module respectively, and is used for detecting and outputting working temperature to the temperature signal detection end of the control module and detecting and outputting battery voltage to the voltage signal detection end of the control module; the control module outputs a state indication signal according to the working temperature and the battery voltage; The state indication module is connected with the driving end of the control module, and is used for displaying working state according to the state indication signal in the control module.

[0009] The further setting of the application, the gravity detection module comprises: a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a second capacitor and an acceleration sensor chip; wherein, The power end of the acceleration sensor chip is connected with the stabilized working voltage, and the ground end of the acceleration sensor chip is grounded; one end of the first resistor is connected with the control module, and the other end of the first resistor is connected with the first signal transmission end of the acceleration sensor chip; the other end of the second resistor is connected with the control module, and the other end of the second resistor is connected with the second signal transmission end of the acceleration sensor chip; the serial data end of the acceleration sensor chip and the serial clock end of the acceleration sensor chip are connected with the control module respectively; One end of the third resistor is connected with the common connection end of the second resistor and the second signal transmission end of the acceleration sensor chip, and the other end of the third resistor is connected with the stabilized working voltage; one end of the fourth resistor is connected with the serial clock end of the acceleration sensor chip, and the other end of the fourth resistor is connected with the stabilized working voltage; one end of the fifth resistor is connected with the serial data end of the acceleration sensor chip, and the other end of the fifth resistor is connected with the stabilized working voltage; One end of the first capacitor and one end of the second capacitor are connected with the common connection end of the stabilized working voltage and the power end of the acceleration sensor chip respectively, and the other end of the first capacitor and the other end of the second capacitor are grounded.

[0010] In a further embodiment of the present invention, the direction display module includes a plurality of independent lighting units, each independent lighting unit including a lighting driving network and a lighting network. The input terminal of the lighting driving network of each independent lighting unit is connected to the control module, and the output terminal of each lighting driving network is connected to the lighting network of each independent lighting unit, for outputting a lighting driving signal to each lighting network according to the direction display signal output by the control module. The lighting network is used to rotate the lights to the left or right according to the lighting drive signal.

[0011] In a further embodiment of the present invention, the lighting driving network includes: a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a third capacitor, a fourth capacitor, a first rectifier diode, a first inductor, and a pulse signal control chip; wherein, The power supply terminal of the pulse signal control chip is connected to the battery voltage. The first terminal of the first inductor is also connected to the battery voltage, and the other terminal of the first inductor is connected to the anode of the first rectifier diode. The cathode of the first rectifier diode is connected to the lighting network. One terminal of the third capacitor is connected to the common terminal of the battery voltage and the power supply terminal of the pulse signal control chip, and the other terminal of the third capacitor is grounded. One terminal of the fourth capacitor is connected to the cathode of the first rectifier diode. One terminal of the sixth resistor is connected to the control module, and the other terminal of the sixth resistor is connected to the enable terminal of the pulse signal control chip. One terminal of the seventh resistor is connected to the common terminal of the sixth resistor and the pulse signal control chip, and the other terminal of the seventh resistor is grounded. The ground terminal of the pulse signal control chip is grounded; the switching terminal of the pulse signal control chip is connected to the common terminal of the first inductor and the first rectifier diode; the drive output terminal of the pulse signal control chip is connected to the common terminal of the first rectifier diode and the fourth capacitor; and the feedback voltage terminal of the pulse signal control chip is connected to one end of the eighth resistor. The other end of the eighth resistor is connected to the lighting network; one end of the ninth resistor is connected to the common terminal of the eighth resistor and the lighting network, and the other end of the ninth resistor is grounded.

[0012] Secondly, the present invention provides a control method for controlling the aforementioned steering sensor display circuit, the steps of which include: The first X-axis change value, the second X-axis change value, and the Y-axis change value in the gravity detection module are obtained. The first X-axis change value and the second X-axis change value are used to represent the change of tilt in the horizontal direction, and the Y-axis change value is used to represent the change of tilt in the vertical direction. The current X-axis position is determined based on the first X-axis change value and the second X-axis change value, and then the X-axis position return value is obtained. The working status of the direction display module is determined based on the X-axis position return value.

[0013] In a further embodiment of the present invention, the step of determining the current value of the X-axis position based on the first X-axis change value and the second X-axis change value, and then obtaining the X-axis position return value, includes: The X-axis center position value and the negative X-axis center position value are determined based on the number of independent lighting units in the lighting display module, wherein the number of independent lighting units is odd, and the negative X-axis center position value is the negative value of the X-axis center position value. Calculate the current value of the X-axis based on the first X-axis change value and the second X-axis change value; The current X-axis value is compared with the negative value of the X-axis center position and the X-axis center position value; when the current X-axis value is less than or equal to the negative value of the X-axis center position, the X-axis position return value is mapped to the number of independent lighting units; When the current value of the X-axis is greater than the value of the center position of the X-axis, the X-axis position return value is mapped to 1; When the current value of the X-axis is greater than the negative value of the X-axis center position but less than the value of the X-axis center position, the X-axis position return value is mapped to the difference between the X-axis center position value and the current value of the X-axis.

[0014] A further provision of the present invention, after the step of determining that when the current X-axis value is greater than the negative value of the X-axis center position but less than the X-axis center position value, the X-axis position return value is the difference between the X-axis center position value and the current X-axis value, further includes: The Y-axis change value is compared with the positive Y-axis threshold and the flipped negative Y-axis value; when the Y-axis change value is less than the flipped negative Y-axis value, the mapping relationship between the current X-axis value being less than or equal to the negative X-axis center position value and the current X-axis value being greater than the X-axis center position value is reversed; when the current X-axis value is greater than the negative X-axis center position value and less than the X-axis center position value, the X-axis position return value is mapped to the sum of the X-axis center position value and the current X-axis value. When the change value of the Y-axis is greater than the negative value of the flipped Y-axis and less than the positive threshold of the Y-axis, the X-axis position return value is mapped to the center position value of the X-axis.

[0015] Thirdly, the present invention also provides a bicycle light, wherein the bicycle light is provided with the aforementioned turn signal sensing display circuit.

[0016] This invention provides a turn signal sensing display circuit, a control method, and a bicycle light. The turn signal sensing display circuit includes: a gravity detection module, a control module, and a direction display module. The gravity detection module is connected to a first detection terminal of the control module, used to detect changes in gravity direction during turning and output a gravity signal to the control module. The output terminal of the control module is connected to the direction display module, used to output a direction display signal to the direction display module based on the gravity signal. The direction display module illuminates and scrolls in the corresponding direction based on the direction display signal to display the turn. This invention determines the turning direction by detecting changes in gravity direction caused by the bicycle's tilt during turning, and then controls the illuminated signal in the direction display module to scroll in the corresponding direction of the turn, thereby providing a timely turn signal to the surrounding environment. This effectively reduces safety accidents caused by failure to activate turn signals in time or during riding, and improves road traffic safety. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the steering sensing display circuit in this invention.

[0019] Figure 2 This is a schematic diagram of the structure of the turn-sensing display circuit in a further embodiment of a preferred embodiment of the present invention.

[0020] Figure 3 This is a circuit diagram of the gravity detection module in this invention.

[0021] Figure 4 This is a circuit diagram of the lighting driving network in this invention.

[0022] Figure 5 This is the circuit schematic diagram of the control module in this invention.

[0023] Figure 6 This is the circuit diagram of the temperature and pressure detection module in this invention.

[0024] Figure 7 This is a circuit diagram of the status indication module in this invention.

[0025] Figure 8 This is a circuit diagram of the charging unit in this invention.

[0026] Figure 9This is a circuit diagram of the lighting network in this invention.

[0027] Figure 10 This is a flowchart of the control method in this invention.

[0028] The markings in the attached diagram are as follows: 100, gravity detection module; 200, control module; 300, direction display module; 400, power supply module; 500, temperature and pressure detection module; 600, status indication module; 410, charging unit; 420, battery unit; 430, voltage regulator unit; 310, independent lighting unit; 311, lighting drive network; 312, lighting network. Detailed Implementation

[0029] This invention provides a turn signal sensing display circuit, a control method, and a bicycle light. To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0030] In the implementation methods and claims, unless otherwise specified in the text, the terms "a," "an," "the," and "the" may also include plural forms. If the embodiments of the present invention involve descriptions of "first," "second," etc., such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0031] It should be further understood that the term "comprising" as used in this specification means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should be understood that when we say an element is "connected" or "coupled" to another element, it can be directly connected or coupled to the other element, or there may be intermediate elements. Furthermore, "connected" or "coupled" as used herein can include wireless connections or wireless coupling. The term "and / or" as used herein includes all or any unit and all combinations of one or more associated listed items.

[0032] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0033] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0034] The inventor's research revealed that most bicycles currently lack built-in lights, increasing the risk of accidents, especially at night due to poor visibility. Some cyclists install their own lights for safety, either mounted at the front for illumination or at the rear for warning. These lights typically have only one button on the light itself for power, lacking an external switch on the handlebars. This limited functionality fails to fully meet riders' needs, particularly regarding braking and turning signals. While some lights are equipped with sensors that illuminate during braking, they lack this feature for turning. Adding turn signals requires installing separate turn signals on either side of the bike, activated by a switch on the handlebars. However, this method is cumbersome, involves numerous wires, and is inconvenient to operate.

[0035] Regarding the shortcomings of the aforementioned products, firstly, such as Figure 1 As shown, the present invention provides a steering sensing display circuit, which includes: a gravity detection module 100, a control module 200, and a direction display module 300; wherein, the gravity detection module 100 is connected to the first detection terminal of the control module 200, and is used to detect the change in gravity direction during steering and output a gravity signal to the control module 200; the output terminal of the control module 200 is connected to the direction display module 300, and is used to output a direction display signal to the direction display module 300 according to the gravity signal; the direction display module 300 is used to light up and scroll in the corresponding direction according to the direction display signal to perform steering display.

[0036] Specifically, this invention is based on the principle that bicycles tend to lean to one side when turning. When a bicycle needs to turn during riding, the bicycle body leans in the corresponding direction to ensure torque balance. Accordingly, the gravity detection module 100 detects the change in the direction of gravity at this time, and then outputs a gravity signal that can be used to characterize the direction and degree of gravity change to the control module 200. The control module 200 can calculate the tilting direction and degree of the gravity detection module 100 based on this gravity signal, and then infer the tilting direction of the bicycle based on the working state of the gravity detection module 100. Specifically, the control strategy of the control module 200 varies depending on the tilting direction of the bicycle, and outputs a corresponding direction display signal. The direction display module 300 then illuminates the light according to the direction display signal, indicating the corresponding tilting direction of the bicycle. For example, when the bicycle tilts to the left, the gravity detection module 100 inside the bicycle light element detects the change in the direction of gravity, and the direction display module 300 displays a continuously scrolling illumination signal to the left. Correspondingly, when the bicycle leans to the right, the bicycle lights also lean to the right, and the direction display module 300 displays a continuously scrolling lighting signal to the right.

[0037] like Figure 3As shown, the gravity detection module 100 includes: a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first capacitor C1, a second capacitor C2, and an accelerometer chip U1; wherein, the power supply terminal of the accelerometer chip U1 is connected to a stable operating voltage, and the ground terminal of the accelerometer chip U1 is grounded; one end of the first resistor R1 is connected to the control module 200, and the other end of the first resistor R1 is connected to the first signal transmission terminal of the accelerometer chip U1; the other end of the second resistor R2 is connected to the control module 200, and the other end of the second resistor R2 is connected to the second signal transmission terminal of the accelerometer chip U1; the serial data terminal and the serial clock terminal of the accelerometer chip U1 are respectively connected to the control module 200, and the second signal transmission terminal of the accelerometer chip U1. The control module 200 is connected; one end of the third resistor R3 is connected to the common terminal of the second resistor R2 and the second signal transmission terminal of the accelerometer chip U1, and the other end of the third resistor R3 is connected to a regulated operating voltage of 3V3; one end of the fourth resistor R4 is connected to the serial clock terminal of the accelerometer chip U1, and the other end of the fourth resistor R4 is connected to a regulated operating voltage of 3V3; one end of the fifth resistor R5 is connected to the serial data terminal of the accelerometer chip U1, and the other end of the fifth resistor R5 is connected to a regulated operating voltage of 3V3; one end of the first capacitor C1 and one end of the second capacitor C2 are respectively connected to the common terminal of the regulated operating voltage of 3V3 and the power supply terminal of the accelerometer chip U1, and the other ends of the first capacitor C1 and the second capacitor C2 are grounded. Specifically, the acceleration sensor chip U1 is preferably a BMA530. The acceleration sensor chip U1 can output different weight signals according to its tilt direction and tilt degree, and send the weight signals and corresponding clock information to the control module 200 through the serial data terminal and the serial clock terminal, respectively.

[0038] Please refer to the following: Figure 2 , Figure 4 and Figure 5 In a further embodiment of the present invention, the direction display module 300 includes a plurality of independent lighting units 310. Each independent lighting unit 310 includes a lighting driving network 311 and a lighting network 312. The input terminal of the lighting driving network 311 of each independent lighting unit 310 is connected to the control module 200, and the output terminal of each lighting driving network 311 is connected to the lighting network 312 of each independent lighting unit 310. The lighting network 312 is used to output a lighting driving signal to each lighting network 312 according to the direction display signal output by the control module 200. The lighting network 312 is used to scroll and illuminate left or right according to the lighting driving signal.

[0039] Meanwhile, the circuit schematic diagram of the control module 200 described in this invention is as follows: Figure 5 As shown, the control module 200 includes at least one main control chip U4. The main control chip U4 is connected to the gravity detection module 100, the direction display module 300, the temperature and pressure detection module 500, and the status indication module 600, respectively. It operates based on the regulated operating voltage of 3V3 provided by the voltage regulator unit 430, processes the signals input from the gravity detection module 100 and the temperature and pressure detection module 500, and controls the opening and closing of the direction display module 300 and the status indication module 600 accordingly. The preferred model of the main control chip U4 is EFM8UB20F32G-B-QFN32.

[0040] For details, please continue reading Figure 4 The lighting driving network 311 includes: a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a third capacitor C3, a fourth capacitor C4, a first rectifier diode SBD1, a first inductor L1, and a pulse signal control chip U2; wherein, the power supply terminal of the pulse signal control chip U2 is connected to the battery voltage Vsw, the first terminal of the first inductor L1 is connected to the battery voltage Vsw, the other terminal of the first inductor L1 is connected to the anode of the first rectifier diode SBD1, and the cathode of the first rectifier diode SBD1 is connected to the lighting network 312; one terminal of the third capacitor C3 is connected to the common terminal of the battery voltage Vsw and the power supply terminal of the pulse signal control chip U2, and the other terminal of the third capacitor C3 is grounded; one terminal of the fourth capacitor C4 is connected to the cathode of the first rectifier diode SBD1; one terminal of the sixth resistor R6 is connected to the control module 200. The connection is as follows: one end of the sixth resistor R6 is connected to the enable terminal of the pulse signal control chip U2; one end of the seventh resistor R7 is connected to the common terminal of the sixth resistor R6 and the pulse signal control chip U2, and the other end of the seventh resistor R7 is grounded; the ground terminal of the pulse signal control chip U2 is grounded; the switching terminal of the pulse signal control chip U2 is connected to the common terminal of the first inductor L1 and the first rectifier diode SBD1; the drive output terminal of the pulse signal control chip U2 is connected to the common terminal of the first rectifier diode SBD1 and the fourth capacitor C4; the feedback voltage terminal of the pulse signal control chip U2 is connected to one end of the eighth resistor R8; the other end of the eighth resistor R8 is connected to the lighting network 312; one end of the ninth resistor R9 is connected to the common terminal of the eighth resistor R8 and the lighting network 312, and the other end of the ninth resistor R9 is grounded. The internal circuit connection relationships of the parallel lighting drive networks 311 in the independent lighting unit 310 are the same, and will not be described again here.

[0041] Each lighting driver network 311 is connected to one pin of the jumper JP1. For example, this invention uses five independent lighting units 310, each of which includes five lighting networks 312 connected to each lighting driver network 311. (See [link to previous section]). Figure 9 The lighting network 312 includes a first lighting network 312a, a second lighting network 312b, a third lighting network 312c, a fourth lighting network 312d, and a fifth lighting network 312e. Each lighting network 312 is independent of the others and is connected to each lighting drive network 311 through a jumper JP1.

[0042] Furthermore, please refer to the following: Figure 2 and Figure 8 The turn signal sensing display circuit also includes a power module 400, which provides the operating voltage. The power module 400 includes a charging unit 410, a battery unit 420, and a voltage regulator unit 430. One end of the charging unit 410 is connected to an external power source, and the other end is connected to the battery unit 420, outputting a constant current voltage to the battery unit 420. The battery unit 420 is connected to both the direction display module 300 and the voltage regulator unit 430, charging according to the constant current voltage and outputting a battery voltage VBAT to both the direction display module 300 and the voltage regulator unit 430. The voltage regulator unit 430 regulates the battery voltage VBAT to obtain a regulated operating voltage of 3V3. The external power source can be AC ​​mains power or other external energy sources capable of providing electrical energy; this invention does not impose any limitations on this. The charging unit 410 includes at least one charging chip U3, preferably a DS6521BJD22, which is used to regulate the input voltage and current and control the charging state on and off. The voltage regulator unit 430 is used to regulate the battery voltage VBAT output by the battery unit 420 to 3.3V. The circuit structure of the voltage regulator unit 430 is existing technology and can be constructed using a voltage regulator chip of model LY7233M. This will not be described in detail here.

[0043] In a further embodiment of the present invention, the steering sensor display circuit also includes a temperature and pressure detection module 500 and a status indication module 600; wherein, the temperature and pressure detection module 500 is connected to the temperature signal detection terminal and the voltage signal detection terminal of the control module 200 respectively, and is used to detect and output the operating temperature to the temperature signal detection terminal of the control module 200, and detect and output the battery voltage VBAT to the voltage signal detection terminal of the control module 200; the control module 200 outputs a status indication signal according to the operating temperature and the battery voltage VBAT; the status indication module 600 is connected to the drive terminal of the control module 200, and is used to display the operating status according to the status indication signal in the control module 200.

[0044] Since the bicycle light is powered by the battery unit 420, heat is generated when the charging circuit charges the battery in the battery unit 420 and when the lighting network 312 is working. This heat is transferred to the battery, causing its temperature to rise. Therefore, real-time monitoring of the battery voltage and temperature protects the battery. Correspondingly, any abnormalities are displayed through the temperature and voltage indicator modules, allowing the user to see the battery's condition and prompting timely charging if the battery is low on power. The status indicator module 600 includes at least one dual-color LED. During charging or use, a green light indicates a full charge, a yellow light indicates half-charge, and a red light indicates low power. A flashing red alarm indicates excessively high or low temperature.

[0045] like Figure 6As shown, the temperature and pressure detection module 500 includes: a 32nd resistor R32, a 33rd resistor R33, a 34th resistor R34, a 35th resistor R35, a 36th resistor R36, a 37th resistor R37, a 16th capacitor C16, a 17th capacitor C17, a temperature-changing resistor RV1, a first field-effect transistor Q1, and a second transistor Q2. One end of the 32nd resistor R32 is connected to the battery voltage VBAT, and the other end of the 32nd resistor R32 is connected to the collector of the second transistor Q2. The base of the second transistor Q2 is connected to one end of the 33rd resistor R33, and the emitter of the second transistor Q2 is grounded. The other end of the 33rd resistor R33 is connected to the detection enable terminal of the control module 200. One end of the 34th resistor R34 is connected to the common terminal of the 33rd resistor R33 and the control module 200, and the other end of the 34th resistor R34 is connected to one end of the 16th capacitor C16. The other end of the 16th capacitor C16 is grounded. One end of the temperature-switching resistor RV1 is connected to the common terminal of the sixteenth capacitor C16 and the thirty-fourth resistor R34, and the other end of the temperature-switching resistor RV1 is grounded. The temperature detection terminal of the control module 200 is connected to the common terminal of the temperature-switching resistor RV1 and the thirty-fourth resistor R34. The source of the first field-effect transistor Q1 is connected to the battery voltage VBAT, the gate of the first field-effect transistor Q1 is connected to the collector of the second transistor Q2, and the drain of the first field-effect transistor Q1 is connected to the direction display module 300 and one end of the thirty-fifth resistor R35. The other end of the thirty-fifth resistor R35 is connected to one end of the thirty-sixth resistor R36 and one end of the thirty-seventh resistor R37, and the other end of the thirty-sixth resistor R36 is connected to the battery voltage VBAT detection terminal of the control module 200. One end of the seventeenth capacitor C17 is connected to the battery voltage VBAT detection terminal of the control module 200, and the other end of the seventeenth capacitor C17 and the other end of the thirty-seventh resistor R37 are grounded.

[0046] like Figure 7As shown, the status indication module 600 includes a first bicolor diode LED1, a second bicolor diode LED2, a thirty-eighth resistor R38, a thirty-ninth resistor R39, a fortieth resistor R40, and a forty-first resistor R41. The power supply terminals of the first bicolor diode LED1 and the second bicolor diode LED2 are respectively connected to a regulated operating voltage of 3V3, preferably a 3.3V DC voltage. The first bicolor diode LED1 and the second bicolor diode LED2 can be selected from bicolor LED modules of model HL-PCEBA-3010S9FU51GC. The green light control terminal of the first bicolor diode LED1 is connected to one end of the thirty-eighth resistor R38, and the red light control terminal of the first bicolor diode LED1 is connected to one end of the thirty-ninth resistor R39. The green light control terminal of the second bicolor diode LED2 is connected to one end of the fortieth resistor R40, and the red light control terminal of the second bicolor diode LED2 is connected to one end of the forty-first resistor R41. The other ends of the thirty-eighth resistor R38 and the fortieth resistor R40 are connected to the green light control terminal of the control module 200, and the other ends of the thirty-ninth resistor R39 and the forty-first resistor R41 are connected to the red light control terminal of the control module 200. The control module 200 converts the voltage signal detected at the battery voltage VBAT detection terminal into corresponding diode control signals output at the green and red light control terminals, thereby controlling the working state of the status indication module 600.

[0047] This patent employs a tilt steering sensing detection circuit, which, upon detecting a steering signal, controls the LED display to show different signals depending on the vehicle's lighting status. This technology, applied to LED cycling products, integrates a charging circuit, a voltage regulator circuit, a gravity sensor circuit, a temperature and voltage detection circuit, a temperature and voltage indicator circuit, a main controller, an LED driver circuit, and an LED display circuit.

[0048] Specifically, one end of the charging unit 410 can be connected to any one of the charging interfaces such as USB-A, Type-C, and Lightning. The charging interface is used to input voltage to the charging unit 410. The charging unit 410 outputs a constant current voltage to charge the battery unit 420. The battery unit 420 supplies power to the voltage regulator unit 430. The voltage regulator unit 430 outputs a regulated operating voltage of 3V3 to the main control chip U4 in the control module 200. The temperature and pressure detection module 500 outputs the detected temperature and voltage signals to the control module 200. The control module 200 determines whether the temperature and voltage are normal, and then displays them through the lighting network 312 in the independent lighting unit 310, and determines whether the bicycle light is allowed to be turned on. After the gravity detection module 100 detects a gravity signal, it outputs a signal to the control module 200. The control module 200 recognizes the gravity signal and then sends directional display signals to the corresponding independent lighting units 310 in the directional display module 300. The lighting driving network 311 of each independent lighting unit 310 receives the directional display signal and outputs a corresponding lighting driving signal to illuminate the corresponding lighting network 312. This allows for automatic scrolling illumination by detecting the tilt direction, providing left or right turn direction indication.

[0049] Secondly, the present invention provides a control method such as Figure 10 As shown, the steps for controlling the aforementioned steering sensor display circuit include: S100. Obtain the first X-axis change value, the second X-axis change value, and the Y-axis change value from the gravity detection module, wherein the first X-axis change value and the second X-axis change value are used to represent the change in tilt in the horizontal direction, and the Y-axis change value is used to represent the change in tilt in the vertical direction. Specifically, the gravity detection module can detect changes in the X, Y, and Z axes. When the bicycle tilts, there will be a change in its value along the X-axis. The gravity detection module records this change and obtains a first X-axis change value and a second X-axis change value. It should be noted that the first and second X-axis change values ​​are the coordinate components of the gravity direction along the X-axis after the gravity change is completed, and the track tilts along the X-axis. Specifically, the difference between the first X-axis change value at the previous moment and the current X-axis value is divided by the short rolling average value, and the sum of this and the previous first X-axis change value is the first X-axis change value. The short rolling average value is a predetermined value, assumed to be 20. Accordingly, the difference between the second X-axis change value at the previous moment and the current X-axis value is divided by the long rolling average, and then the sum of this difference and the second X-axis change value at the previous moment is the second X-axis change value. The long rolling average is a predetermined value, and the short rolling average is assumed to be 3. Thus, the two X-axis values ​​obtained internally are smoothed by the moving average method, which can filter out interference factors and ensure that motion can be detected stably on each axis.

[0050] S200: Determine the current value of the X-axis position based on the first X-axis change value and the second X-axis change value, and then obtain the X-axis position return value; Specifically, the first and second X-axis change values ​​are calculated and standardized to obtain the current X-axis position value, which indicates the degree of tilt of the gravity detection module in the bicycle light at this time. Furthermore, the current X-axis position value is mapped to the returned X-axis position value.

[0051] S300. Determine the working status of the direction display module based on the X-axis position return value.

[0052] The independent lighting unit receives an X-axis position return value. Specifically, the X-axis position return value is used to visually represent the working state to be selected after the independent lighting unit is turned on, and the direction display module can display the bicycle's tilt direction and tilt degree through a light scrolling program of different working states.

[0053] In a further embodiment of the present invention, the step of determining the current value of the X-axis position based on the first X-axis change value and the second X-axis change value, and then obtaining the X-axis position return value, includes: S210. Determine the X-axis center position value and the negative X-axis center position value based on the number of independent lighting units in the lighting display module, wherein the number of independent lighting units is odd, and the negative X-axis center position value is the negative value of the X-axis center position value. S220. Calculate the current value of the X-axis based on the first X-axis change value and the second X-axis change value; S230. Compare the current X-axis value with the negative value of the X-axis center position and the X-axis center position value; when the current X-axis value is less than or equal to the negative value of the X-axis center position, the X-axis position return value is mapped to the number of independent lighting units; S240. When the current value of the X-axis is greater than the value of the center position of the X-axis, the X-axis position return value is mapped to 1. S250. When the current value of the X-axis is greater than the negative value of the X-axis center position but less than the value of the X-axis center position, the X-axis position return value is mapped to the difference between the X-axis center position value and the current value of the X-axis.

[0054] Preferably, this invention uses a bicycle light with five independent lighting units, i.e., five LED areas, as an example. Instead of directly illuminating specific sections based on the degree of left / right tilt, it returns a value that can be used to select the lighting mode, i.e., the X-axis position return value. The X-axis position return value is determined based on the tilt angle of the bicycle light, thereby determining the pattern to be displayed. Specifically, since the X, Y, and Z axes of the gravity detection module are used to indicate left / right, up / down, and forward / backward respectively, they indicate the tilt angle in the corresponding direction through offset parameters in both positive and negative directions. Specifically, taking the X-axis, i.e., the left / right direction, as an example, the difference between the first and second X-axis change values ​​is divided by a fixed X-axis detection change threshold, assumed to be 1, and the decimal place is rounded. This rounding calculation can be implemented using the `round` function in C language to obtain the current X-axis value. Thus, the difference between the first and second X-axis change values ​​is calculated and standardized. The current X-axis value provides a clear measure of the degree of light deflection. It is used to indicate the magnitude and direction of the component of gravity in the X-axis direction when tilted. Specifically, the current X-axis value is compared with the negative X-axis center position value and the actual X-axis center position value. The negative X-axis center position value is the value at the point on the X-axis symmetrical to the X-axis center position value with respect to the origin. The greater the bicycle's rightward tilt, the smaller the current X-axis value, until it is less than or equal to the negative X-axis center position value. The X-axis position return value is then mapped to the number of independent lighting units, i.e., the maximum value of the X-axis position return value. Similarly, the greater the bicycle's leftward tilt, the larger the current X-axis value, until it is greater than or equal to the X-axis center position value, in which case the X-axis position return value is 1. When the current X-axis value lies between the negative X-axis center position value and the actual X-axis center position value, the corresponding X-axis position return value is calculated from the difference between the X-axis center position value and the current X-axis value. The X-axis position return value does not directly illuminate the leftmost or rightmost segment, but rather acts as a mode selector. For example, with five independent lighting units, the X-axis position return value can take five values: 1, 2, 3, 4, and 5. When the accelerometer detects a left tilt signal (i.e., an X-axis position return value of 1 or 2), it is considered a left tilt, and the main controller sends a signal to the lighting network, causing lighting networks 312e-312d-312c-312b-312a to illuminate sequentially. When the accelerometer detects a right tilt signal (i.e., an X-axis position return value of 4 or 5), it is considered a right tilt, and the main controller sends a signal to the lighting network, causing lighting networks 312a-312b-312c-312d-312e to illuminate sequentially.

[0055] A further provision of the present invention, after the step of determining that when the current X-axis value is greater than the negative value of the X-axis center position but less than the X-axis center position value, the X-axis position return value is the difference between the X-axis center position value and the current X-axis value, further includes: S260. Compare the Y-axis change value with the positive Y-axis threshold and the negative Y-axis value after flipping. S270. When the change value of the Y-axis is less than the negative value of the flipped Y-axis, the mapping relationship between the current value of the X-axis being less than or equal to the negative value of the X-axis center position and the current value of the X-axis being greater than the value of the X-axis center position is reversed; when the current value of the X-axis is greater than the negative value of the X-axis center position and less than the value of the X-axis center position, the X-axis position return value is mapped to the sum of the X-axis center position value and the current value of the X-axis. S280. When the change value of the Y-axis is greater than the negative value of the flipped Y-axis and less than the positive threshold of the Y-axis, the return value of the X-axis position is mapped to the center position value of the X-axis.

[0056] Specifically, the X-axis indicates the left and right tilt of the bicycle light, and the Y-axis indicates the up and down direction. Specifically, the negative value of the Y-axis is obtained by taking the negative value of the positive threshold value of the Y-axis, and its distance from the origin on the Y-axis is equal to that of the positive threshold. The bicycle light can adopt any geometric shape with a center line, such as a semi-cylinder, semi-prism, cube, etc., with its center line set vertically, and its direction display module laid out circumferentially on its side. In this case, assuming it is set in the positive direction, when the bicycle light is placed in the positive direction, that is, when the bicycle light is set vertically upward in its natural state, the change value of the Y-axis is greater than the positive threshold value of the Y-axis. The bicycle light rolls to the left and illuminates when the bicycle tilts to the left. However, when the bicycle light rotates 90° to the left or right, the bicycle light is placed flat, and its center line is on the horizontal plane. The bicycle light cannot function as a turn indicator, therefore, the X-axis position return value is mapped to the X-axis center position value, and the bicycle light remains constantly on. When the bicycle light rotates 180° to the left or right, its vertical direction is reversed. The change in the Y-axis value is less than the negative value of the reversed Y-axis. That is, when the gravity detection module determines that the bicycle is tilted to the left, it is actually tilted to the right. The control module reverses the mapping relationship between the current X-axis value (less than or equal to the negative value of the X-axis center position) and the current X-axis value (greater than the X-axis center position value). This reverses the mapping relationship between the X-axis position return value when the bicycle is tilted to the right and the X-axis position return value when the bicycle is tilted to the left. Correspondingly, since the magnitudes of the leftward and rightward offsets are opposite, when the current X-axis value is greater than the negative value of the X-axis center position but less than the X-axis center position value, the X-axis position return value is mapped to the sum of the X-axis center position value and the current X-axis value. Therefore, even if the user accidentally reverses the vertical direction of the bicycle light, or if it is reversed during actual use, the bicycle light can still illuminate according to the direction of the leftward or rightward offset, serving as a turn indicator.

[0057] Thirdly, the present invention also provides a bicycle light, wherein the bicycle light internally incorporates the aforementioned turn signal sensing display circuit. Specific details are as described in the embodiments of the turn signal sensing display circuit, and will not be repeated here.

[0058] This invention provides a turn signal sensing display circuit, a control method, and a bicycle light. The turn signal sensing display circuit includes: a gravity detection module, a control module, and a direction display module. The gravity detection module is connected to a first detection terminal of the control module, used to detect changes in gravity direction during turning and output a gravity signal to the control module. The output terminal of the control module is connected to the direction display module, used to output a direction display signal to the direction display module based on the gravity signal. The direction display module illuminates and scrolls in the corresponding direction based on the direction display signal to display the turn. This invention determines the turning direction by detecting changes in gravity direction caused by the bicycle's tilt during turning, and then controls the illuminated signal in the direction display module to scroll in the corresponding direction of the turn, thereby providing a timely turn signal to the surrounding environment. This effectively reduces safety accidents caused by failure to activate turn signals in time or during riding, and improves road traffic safety.

[0059] It should be understood that the application of the present invention is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A turn signal sensing display circuit, characterized in that, include: Gravity detection module, control module, and direction display module; among them, The gravity detection module is connected to the first detection terminal of the control module and is used to detect the change in gravity direction during turning and output a gravity signal to the control module. The output terminal of the control module is connected to the direction display module, and is used to output a direction display signal to the direction display module according to the gravity signal; The direction display module is used to light up and scroll in the corresponding direction according to the direction display signal to display the direction.

2. The turn signal sensing display circuit according to claim 1, characterized in that, It also includes a power module for providing operating voltage; the power module includes: a charging unit, a battery unit, and a voltage regulator unit; wherein, One end of the charging unit is connected to an external power source, and the other end of the charging unit is connected to the battery unit and is used to output a constant current voltage to the battery unit. The battery unit is connected to the orientation display module and the voltage regulator unit respectively, and is used to charge according to the constant current voltage, and to output battery voltage to the orientation display module and the voltage regulator unit respectively; The voltage regulator unit regulates the battery voltage to obtain a regulated operating voltage.

3. The turn signal sensing display circuit according to claim 1, characterized in that, It also includes a temperature and pressure detection module and a status indication module; wherein, the temperature and pressure detection module is connected to the temperature signal detection terminal and the voltage signal detection terminal of the control module respectively, and is used to detect and output the operating temperature to the temperature signal detection terminal of the control module, and detect and output the battery voltage to the voltage signal detection terminal of the control module; the control module outputs a status indication signal according to the operating temperature and the battery voltage; The status indication module is connected to the drive end of the control module and is used to display the working status according to the status indication signal in the control module.

4. The turn signal sensing display circuit according to claim 1, characterized in that, The gravity detection module includes: a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a second capacitor, and an acceleration sensor chip; wherein, The power supply terminal of the accelerometer chip is connected to a stable operating voltage, and the ground terminal of the accelerometer chip is grounded; one end of the first resistor is connected to the control module, and the other end of the first resistor is connected to the first signal transmission terminal of the accelerometer chip; the other end of the second resistor is connected to the control module, and the other end of the second resistor is connected to the second signal transmission terminal of the accelerometer chip; the serial data terminal and the serial clock terminal of the accelerometer chip are respectively connected to the control module. One end of the third resistor is connected to the common terminal of the second resistor and the second signal transmission terminal of the accelerometer chip, and the other end of the third resistor is connected to a regulated operating voltage; one end of the fourth resistor is connected to the serial clock terminal of the accelerometer chip, and the other end of the fourth resistor is connected to a regulated operating voltage; one end of the fifth resistor is connected to the serial data terminal of the accelerometer chip, and the other end of the fifth resistor is connected to a regulated operating voltage. One end of the first capacitor and one end of the second capacitor are respectively connected to the common terminal of the regulated working voltage and the power supply terminal of the acceleration sensor chip, and the other ends of the first capacitor and the second capacitor are grounded.

5. The turn signal sensing display circuit according to claim 1, characterized in that, The direction display module includes several independent lighting units. Each independent lighting unit includes a lighting driving network and a lighting network. The input terminal of the lighting driving network of each independent lighting unit is connected to the control module, and the output terminal of each lighting driving network is connected to the lighting network of each independent lighting unit. This is used to output lighting driving signals to each lighting network according to the direction display signal output by the control module. The lighting network is used to rotate the lights to the left or right according to the lighting drive signal.

6. The turn signal sensing display circuit according to claim 5, characterized in that, The lighting driving network includes: a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a third capacitor, a fourth capacitor, a first rectifier diode, a first inductor, and a pulse signal control chip; wherein, The power supply terminal of the pulse signal control chip is connected to the battery voltage. The first terminal of the first inductor is also connected to the battery voltage, and the other terminal of the first inductor is connected to the anode of the first rectifier diode. The cathode of the first rectifier diode is connected to the lighting network. One terminal of the third capacitor is connected to the common terminal of the battery voltage and the power supply terminal of the pulse signal control chip, and the other terminal of the third capacitor is grounded. One terminal of the fourth capacitor is connected to the cathode of the first rectifier diode. One terminal of the sixth resistor is connected to the control module, and the other terminal of the sixth resistor is connected to the enable terminal of the pulse signal control chip. One terminal of the seventh resistor is connected to the common terminal of the sixth resistor and the pulse signal control chip, and the other terminal of the seventh resistor is grounded. The ground terminal of the pulse signal control chip is grounded; the switching terminal of the pulse signal control chip is connected to the common terminal of the first inductor and the first rectifier diode; the drive output terminal of the pulse signal control chip is connected to the common terminal of the first rectifier diode and the fourth capacitor; and the feedback voltage terminal of the pulse signal control chip is connected to one end of the eighth resistor. The other end of the eighth resistor is connected to the lighting network; one end of the ninth resistor is connected to the common terminal of the eighth resistor and the lighting network, and the other end of the ninth resistor is grounded.

7. A control method for controlling the turn signal sensing display circuit as described in any one of claims 1-6, characterized in that the step include: The first X-axis change value, the second X-axis change value, and the Y-axis change value in the gravity detection module are obtained. The first X-axis change value and the second X-axis change value are used to represent the change of tilt in the horizontal direction, and the Y-axis change value is used to represent the change of tilt in the vertical direction. The current X-axis position is determined based on the first X-axis change value and the second X-axis change value, and then the X-axis position return value is obtained. The working status of the direction display module is determined based on the X-axis position return value.

8. The control method according to claim 7, characterized in that, The step of determining the current X-axis position value based on the first X-axis change value and the second X-axis change value, and then obtaining the X-axis position return value, includes: The X-axis center position value and the negative X-axis center position value are determined based on the number of independent lighting units in the lighting display module, wherein the number of independent lighting units is odd, and the negative X-axis center position value is the negative value of the X-axis center position value. Calculate the current value of the X-axis based on the first X-axis change value and the second X-axis change value; The current X-axis value is compared with the negative value of the X-axis center position and the X-axis center position value; when the current X-axis value is less than or equal to the negative value of the X-axis center position, the X-axis position return value is mapped to the number of independent lighting units; When the current value of the X-axis is greater than the value of the center position of the X-axis, the X-axis position return value is mapped to 1; When the current value of the X-axis is greater than the negative value of the X-axis center position but less than the value of the X-axis center position, the X-axis position return value is mapped to the difference between the X-axis center position value and the current value of the X-axis.

9. The control method according to claim 8, characterized in that, After the step where the current X-axis value is greater than the negative value of the X-axis center position but less than the X-axis center position value, and the X-axis position return value is the difference between the X-axis center position value and the current X-axis value, the method further includes: The Y-axis change value is compared with the positive Y-axis threshold and the flipped negative Y-axis value; when the Y-axis change value is less than the flipped negative Y-axis value, the mapping relationship between the current X-axis value being less than or equal to the negative X-axis center position value and the current X-axis value being greater than the X-axis center position value is reversed; when the current X-axis value is greater than the negative X-axis center position value and less than the X-axis center position value, the X-axis position return value is mapped to the sum of the X-axis center position value and the current X-axis value. When the change value of the Y-axis is greater than the negative value of the flipped Y-axis and less than the positive threshold of the Y-axis, the X-axis position return value is mapped to the center position value of the X-axis.

10. A bicycle light, characterized in that, The bicycle light is equipped with a turn signal display circuit as described in any one of claims 1-6.

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