Optical frequency incoming call prompter
Through the optical frequency incoming call prompter, using the frequency of light to communicate in the environment of electromagnetic signal interference and blind spots, solving the problem that existing infrared light technology is difficult to achieve accurate positioning and information transmission, and achieving stronger confidentiality and lower usage costs.
Patent Information
- Application Number
- CN202411779707.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-05
- Publication Date
- 2025-03-04
AI Technical Summary
Existing infrared light technology is difficult to achieve accurate positioning and information transmission in environments such as electromagnetic signal interference and electromagnetic blind spots.
An optical frequency incoming call prompt is used to perform mobile communication through the frequency of light, and a central processor unit, a light emitting unit, a light receiving unit, an acousto-optical alarm unit and a display unit are used to realize the positioning and information transmission of infrared light.
In areas disturbed by electromagnetic signals, stronger confidentiality and lower usage costs are achieved, and accurate personnel positioning and information prompts can be carried out.
Smart Images
Figure CN119559760A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to an optical frequency incoming call reminder, belonging to the technical field of infrared optical communication. Background Art
[0002] At present, with the improvement of living standards, the intelligence of equipment covers almost all aspects of life. GPS global positioning system is the most common positioning technology now, which provides convenience for daily life. It uses the principle of thermal radiation to detect and identify targets. Since the infrared radiation emitted by an object is directly related to the surface temperature of the object, the surface temperature of the object can be reflected through infrared imaging, thereby realizing the positioning and tracking of the target. However, its positioning accuracy will be affected by factors such as electromagnetic signal interference and offline status. It is difficult to achieve the positioning function in special places such as coal mine safety production and caves. As early as the mid-20th century, infrared light technology was gradually used in missile seekers, night vision devices and other military equipment. Moreover, with the reduction of technical costs and the maturity of technology, infrared light technology has begun to be widely used in civilian equipment such as security monitoring, temperature measurement, and contactless operation equipment. Therefore, infrared light technology plays an increasingly important role in security and confidentiality. Summary of the invention
[0003] In order to overcome the shortcomings of the above-mentioned prior art, the present invention provides an optical frequency call reminder, which is a device that uses the frequency of light for mobile communication. The terminal processes and modulates the electrical signal to be transmitted, converts the electrical signal into an optical signal and sends it out. The optical frequency mobile communication terminal is equipped with a photodiode to restore the detected optical signal.
[0004] The present invention is realized through the following technical scheme: an optical frequency incoming call reminder, comprising a central processing unit, an optical transmitting unit, an optical receiving unit, a battery, a power management unit, an audible and audible alarm unit and a display unit, wherein the central processing unit is connected to the optical transmitting unit, the optical receiving unit, the audible and audible alarm unit and the display unit, the battery is connected to the power management unit, and the power management unit is connected to the central processing unit, the optical transmitting unit, the optical receiving unit, the audible and audible alarm unit and the display unit; the central processing unit transmits infrared light through the optical transmitting unit to send positioning and personnel information to an optical communication base station, and receives the message sent by the base station through the optical receiving unit, and the audible and audible alarm unit performs audible and audible prompts.
[0005] The light emitting unit uses an infrared LED as an information transmitting source. The LED is connected to a working voltage and a series resistor to a central processing unit. A program is written in the central processing unit to convert the identification code to be sent into a pulse of a specific format, drive the LED to send data outward, and the interval between two data transmissions is random.
[0006] The light receiving unit uses a light receiving head, which is equipped with a photoelectric receiving diode and a preamplifier IC. The photoelectric receiving diode and the preamplifier IC are integrated on a bracket. The outside of the light receiving head is wrapped with epoxy resin, and a filter and an AGC circuit are built in. The output of pin 1 is connected to the central processing unit. When an optical signal is received from an optical communication base station, it is sent to the single-chip microcomputer and waits for the next response. The receiving tube is connected to a transimpedance amplifier to provide the primary amplified signal after reception to the subsequent stage. In the absence of light, the photodiode will output a small amount of current.
[0007] A button is also provided on the optical frequency incoming call reminder.
[0008] The display unit adopts ink screen display.
[0009] The rated capacity of the battery is 350mAh, the normal operating voltage is 3.7V, the discharge termination voltage is 2.7V, the charging voltage is 4.2V, the standard discharge current is 0.2C constant current discharge to the discharge termination voltage, and the maximum current is 0.5C 200mA.
[0010] The sound and light alarm module uses a chip buzzer and a light emitting diode as sound and light prompts. The working voltage of the chip buzzer is between 2-5V. One end of the chip buzzer is connected to the working voltage, and the other end is connected to the IO port of the central processing unit. A specific program is written in the central processing unit. When it receives data, it sends a specific pulse and then drives the buzzer to oscillate and make a sound.
[0011] The beneficial effects of the present invention are as follows: the present invention is based on wireless optical frequency communication technology, is applicable to areas affected by electromagnetic signal interference and electromagnetic blind areas, and has stronger confidentiality and lower use costs than traditional communication methods. It can be used in conjunction with visible light communication base stations and optical frequency mobile communication terminals to achieve accurate positioning of personnel and information prompts. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The present invention is further described below with reference to the accompanying drawings and embodiments.
[0013] Figure 1 It is a hardware design flow chart of the present invention; Figure 2 is a block diagram of the optical receiving input and output system of the present invention; Figure 3 This is a circuit schematic diagram of an ink screen refresh unit of the present invention; Figure 4 This is a schematic diagram of the ink screen interface circuit of the present invention; Figure 5 It is the charging part interface circuit diagram of the present invention; Figure 6 It is the interface circuit diagram of the discharge part of the present invention. DETAILED DESCRIPTION
[0014] like Figure 1 The optical frequency call reminder shown includes a central processing unit, a light emitting unit, a light receiving unit, a battery, a power management unit, an audible and visual alarm unit and a display unit. The central processing unit is connected to the light emitting unit, the light receiving unit, the audible and visual alarm unit and the display unit. The battery is connected to the power management unit. The power management unit is connected to the central processing unit, the light emitting unit, the light receiving unit, the audible and visual alarm unit and the display unit. The central processing unit emits infrared light through the light emitting unit to send positioning and personnel information to the optical communication base station, and receives the message sent by the base station through the light receiving unit. The audible and visual alarm unit performs audible and visual prompts.
[0015] The light emitting unit uses an infrared LED as an information transmitting source. The LED is connected to a working voltage and a series resistor to a central processing unit. A program is written in the central processing unit to convert the identification code to be sent into a pulse of a specific format, drive the LED to send data outward, and the interval between two data transmissions is random.
[0016] like Figure 2 As shown, in order for the optical receiving system to accurately demodulate the original transmission information, a local carrier signal with the same frequency as the carrier signal at the transmitting end is required. In the digital optical receiving system, the stable clock signal generated by the oscillator provides an accurate time reference for the digital signal processing processes such as signal sampling, quantization, encoding, and decoding, ensuring that each link can operate in the correct timing and guaranteeing the accuracy and reliability of signal processing. To ensure that the received optical signal is purer, there is a filter inside the device that can filter out other wavelengths of light and various interference signals and only allow light of a specific wavelength to pass. The stable high-frequency signal generated by the oscillator will be used as a local carrier signal and mixed with the received optical signal. Under the action of the demodulator, the received signal is converted into an original electrical signal that can be understood by the receiving device.
[0017] The optical receiving unit uses an optical receiving head. The optical receiving head is equipped with a photoelectric receiving diode and a preamplifier IC. The photoelectric receiving diode and the preamplifier IC are integrated on a bracket. The optical receiving head is wrapped with epoxy resin. The epoxy resin can filter special infrared light. Even when used in disturbed ambient light, it has excellent performance during this period and provides protection against uncontrolled output pulses. It has a built-in filter and AGC circuit. The 1-pin output is connected to the central processing unit. When the optical signal from the optical communication base station is received, it is sent to the microcontroller and waits for the next response. At the same time, it has strong anti-interference ability against various interference light and power noise. The receiving tube is connected to a transimpedance amplifier to provide the primary amplified signal after reception to the subsequent stage. Even in the absence of light, the photodiode will output a small amount of current. This dark current will increase as the reverse voltage on the photodiode increases. After light is irradiated to the active area of the photodiode, the current flows from the cathode to the anode. Considering the impact of input offset voltage, input bias current, ambient temperature, etc. on the circuit, in order to minimize the impact of these factors on the circuit, a high-performance operational amplifier is selected as the core device of the transimpedance amplifier, and low-temperature drift and low-ESR resistors and capacitors are used to better restore the received signal. The optical receiving and transmitting modules are exposed to the outside to ensure that they are not blocked.
[0018] A button is also provided on the optical frequency incoming call reminder.
[0019] The display unit adopts ink screen display. The ink screen is composed of individual pixels, and the final display effect of the screen is composed of the overall combination of individual pixels, so no matter what kind of data is transmitted, it is dotted on the screen. Compared with other screens, the display principle of the ink screen is slightly different. OLED is a self-luminous material. The screen is composed of transistors that can be lit independently. It can display rich colors and has a fast response speed, but the power consumption is high, especially in all-white or colorful scenes; LCD screens require light panels to display content. Although LCD technology is more mature and has lower production costs, it may cause color distortion or reduced brightness in certain specific occasions, and long-term viewing of LCD screens can easily cause eye fatigue; and although the ink screen has a slow refresh rate and a narrow color range, it has a good eye protection effect and extremely low power consumption, because the ink screen itself does not emit light, but relies on external light emission to display, so it consumes almost no power during normal display, and only consumes power during the refresh display process. In special occasions where long battery life is more important, the ink screen is the best choice. The electronic ink screen hardware circuit schematic diagram is as follows Figure 3 and Figure 4 shown.
[0020] In order to set the Chinese character personnel information on the host computer, GT32L32S0140 is selected as the dot matrix font chip, and the display content can be changed at will. The chip contains 12X12, 16X16, 24X24, 32X32 dot matrix Chinese character fonts, supports GB2312 national standard simplified Chinese characters and ASCII characters, and contains 512K bytes of free read and write space. The address is: 0x000000~0x007FFFF.
[0021] The rated capacity of the battery is 350mAh, the normal operating voltage is 3.7V, the discharge termination voltage is 2.7V, the charging voltage is 4.2V, the standard discharge current is 0.2C constant current discharge to the discharge termination voltage, and the maximum current is 0.5C 200mA. The selected charging management chip has an input voltage between 3.8V and 6.5V, and the non-working current is less than 1uA. The chip goes through the following three stages for battery charging: regulation, constant current and constant voltage. In all charging stages, the internal control loop monitors the IC junction temperature. When it exceeds the internal temperature threshold, it reduces the charging current, thermal regulation above 125°C, and thermal shutdown protection above 150°C. The charger power stage and charging current sensing functions are fully integrated. The charger has high-precision current and voltage regulation loop functions, charging status display, and charging termination functions. The pre-charge current threshold and termination current threshold are fixed at 20% and 10%, respectively. The fast charging current value can be programmed through an external resistor. Such as Figure 5 As shown in the figure, the power adapter is selected to have a 5.5V 1A output. The power adapter outputs 5.5V to provide power to the charging circuit, and then steps down to 4.6V through three blocking diodes to power the charging management chip. Adjust the resistance of R20 to control the charging current in the constant current stage. The R7 resistor and fast-blow fuse are arranged between the chip OUT pin and the positive electrode of the lithium battery. The voltage drop of the R7 resistor is small during the charging stage, which does not affect the charging function.
[0022] When the device is working normally, the battery starts to discharge to the device and also to the charging circuit. The charging energy is very small and can be ignored. In the case of a fault, the charging management chip is an unreliable component. When the chip OUT pin is short-circuited with the charging interface, the three blocking diodes ensure normal operation or prevent the current from being released to dangerous places in the case of two counting faults. When the chip pin is short-circuited to the ground and the battery output current exceeds the standard, the fuse blows and disconnects, thereby protecting the battery. The R7 resistor uses a 1206 package, which meets the requirements of the safety standard circuit spacing. The resistance power is 1 / 4W, which is greater than the power under unfavorable conditions. It is a reliable component and the fault condition is not considered.
[0023] like Figure 6In the discharge interface circuit shown in the figure, the discharge measurement battery output voltage is 3.7V, the LDO operating voltage is 2.3V-6.0V, and the key components operating voltage is 3V. The battery voltage can work normally when it is higher than 3V, ensuring the normal operation of the equipment. If a short circuit occurs in the subsequent circuit, the fuse will blow, effectively preventing the generation of electric sparks or heat.
[0024] The sound and light alarm module uses a patch buzzer and a light emitting diode as sound and light prompts. The working voltage of the patch buzzer is between 2-5V. One end of the patch buzzer is connected to the working voltage, and the other end is connected to the IO port of the central processing unit. A specific program is written in the central processing unit. When it receives data, it sends a specific pulse and then drives the buzzer to vibrate and make a sound. One end of the light emitting diode is connected in series with a resistor to the working voltage, and the other end is connected to the central processing unit. A specific program is written in the central processing unit. When it receives data, it gives a low level to the IO port to drive the LED to light up.
Claims
1. An optical frequency incoming call reminder, characterized in that: The invention comprises a central processing unit, a light emitting unit, a light receiving unit, a battery, a power management unit, an audible and visual alarm unit and a display unit. The central processing unit is connected to the light emitting unit, the light receiving unit, the audible and visual alarm unit and the display unit. The battery is connected to the power management unit. The power management unit is connected to the central processing unit, the light emitting unit, the light receiving unit, the audible and visual alarm unit and the display unit. The central processing unit emits infrared light through the light emitting unit to send positioning and personnel information to the optical communication base station, and receives the message sent by the base station through the light receiving unit. The audible and visual alarm unit gives audible and visual prompts.
2. The optical frequency incoming call reminder according to claim 1, characterized in that: The light emitting unit uses an infrared LED as an information transmitting source. The LED is connected to a working voltage and a series resistor to a central processing unit. A program is written in the central processing unit to convert the identification code to be sent into a pulse of a specific format, drive the LED to send data outward, and the interval between two data transmissions is random.
3. The optical frequency incoming call reminder according to claim 1, characterized in that: The light receiving unit uses a light receiving head, which is equipped with a photoelectric receiving diode and a preamplifier IC. The photoelectric receiving diode and the preamplifier IC are integrated on a bracket. The outside of the light receiving head is wrapped with epoxy resin, and a filter and an AGC circuit are built in. The output of pin 1 is connected to the central processing unit. When an optical signal is received from an optical communication base station, it is sent to the single-chip microcomputer and waits for the next response. The receiving tube is connected to a transimpedance amplifier to provide the primary amplified signal after reception to the subsequent stage. In the absence of light, the photodiode will output a small amount of current.
4. The optical frequency incoming call reminder according to claim 1, characterized in that: A button is also provided on the optical frequency incoming call reminder.
5. The optical frequency incoming call reminder according to claim 1, characterized in that: The display unit adopts an ink screen display.
6. The optical frequency incoming call reminder according to claim 1, characterized in that: The rated capacity of the battery is 350mAh, the normal operating voltage is 3.7V, the discharge termination voltage is 2.7V, the charging voltage is 4.2V, the standard discharge current is 0.2C constant current discharge to the discharge termination voltage, and the maximum current is 0.5C 200mA.
7. The optical frequency incoming call reminder according to claim 1, characterized in that: The sound and light alarm module uses a chip buzzer and a light emitting diode as sound and light prompts. The working voltage of the chip buzzer is between 2-5V. One end of the chip buzzer is connected to the working voltage, and the other end is connected to the IO port of the central processing unit. A specific program is written in the central processing unit. When it receives data, it sends a specific pulse and then drives the buzzer to oscillate and make a sound.