Low-frequency-band radio measuring head circuit
By adopting a low-frequency radio probe circuit in the 868MHz band, the problems of easy interference in wireless transmission and high power consumption of the equipment are solved, achieving stronger signal penetration and lower power consumption, making it suitable for industrial plant environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-14
- Publication Date
- 2026-03-27
AI Technical Summary
Existing wireless probes are easily interfered with during wireless transmission, leading to inaccurate or lost measurement data, and the devices consume a lot of power.
The low-frequency radio probe circuit using the 868MHz band includes a power supply module, a central control module, a trigger signal module, an indicator light module, an antenna module, and a crystal oscillator module. It uses the CC1310F128RSMR chip and the ME6231A33M3G voltage regulator chip, combined with the main crystal oscillator and the low-frequency crystal oscillator module, to achieve low power consumption and anti-interference.
It improves signal penetration, reduces signal attenuation, extends the placement distance of the receiver, reduces device power consumption, and reduces co-channel interference, making it suitable for use in industrial plants.
Smart Images
Figure CN224052567U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to electronic technical field, concretely relates to a low frequency band wireless radio probe circuit. BACKGROUND
[0002] At present, the probe in the factory building is interfered under wireless transmission, leading to inaccurate data or even loss of the probe measurement, which mainly uses 2.4Ghz wireless scheme, and has the following shortcomings: 1, penetration ability: the wavelength of 2.4Ghz frequency band is short, and the signal attenuation after penetrating the obstacle can reach more than 30%. 868MHz belongs to low frequency band (Sub-1G), and the wavelength is long, and the signal attenuation is small when penetrating the obstacle; 2, environmental interference: 2.4GHz frequency band is occupied by a large number of devices such as Wi-Fi, Bluetooth, microwave oven and the like, which is easy to produce channel congestion, leading to communication interference; 3, device power consumption: the device of 2.4Ghz usually needs high transmission power to make up for the loss of penetrating the obstacle.
[0003] Therefore, it is urgent to develop a low frequency band wireless radio probe circuit with strong penetration ability, anti-interference and low device power consumption. CONTENT OF THE UTILITY MODEL
[0004] The utility model aims at solving one of the above technical problems at least to some extent.
[0005] Therefore, the utility model provides a low frequency band wireless radio probe circuit with strong penetration ability, anti-interference and low device power consumption.
[0006] In order to realize the above purpose, the utility model embodiment discloses a low frequency band wireless radio probe circuit, which comprises a power module, a central control module connected with the power module, a trigger signal module, an indicator light module, and an antenna module and a crystal oscillator module connected with the central control module, wherein the trigger signal module, the indicator light module and the central control module are connected; the trigger signal module comprises a radio communication probe, and the radio communication probe is electrically connected with a first detection point.
[0007] In addition, the low frequency band wireless radio probe circuit according to the above technical scheme of the utility model can also have the following additional technical features:
[0008] Optionally, it also comprises a reset circuit module connected with the central control module.
[0009] Optionally, it also comprises an internal filter module connected with the central control module and a power supply filter module connected with the power module.
[0010] Optionally, the central control module comprises a chip with model number CC1310F128RSMR.
[0011] Optionally, the power module comprises a voltage stabilizing chip of model ME6231A33M3G.
[0012] Optionally, the crystal module comprises a main crystal module and a low-frequency crystal module, and the main crystal module and the low-frequency crystal module are connected with the central control module.
[0013] Optionally, the main crystal module and the low-frequency crystal module each comprise a crystal oscillator, the nominal frequency of the crystal oscillator of the main crystal module is between 20-30 MHz, and the nominal frequency of the crystal oscillator of the low-frequency crystal module is between 25-40 kHz.
[0014] Optionally, the indicator light module comprises a plurality of groups of parallel green light emitting diodes, red light emitting diodes and blue light emitting diodes.
[0015] Optionally, the voltage detection module is further connected with the input end of the power module, the voltage detection module comprises a second detection point and is connected with the central control module.
[0016] Optionally, the debugging burning port and the serial port are further comprised, and the output voltage end of the power module is connected with the central control module through the debugging burning port and the serial port.
[0017] The low-frequency radio probe circuit has the advantages of strong penetration, anti-interference and low equipment power consumption. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 is a structural schematic diagram of a low-frequency radio probe circuit provided by an embodiment of the utility model;
[0019] Figure 2 is a circuit diagram of a power module of a low-frequency radio probe circuit provided by an embodiment of the utility model;
[0020] Figure 3 is a circuit diagram of a central control module of a low-frequency radio probe circuit provided by an embodiment of the utility model;
[0021] Figure 4 is a circuit diagram of a signal triggering module of a low-frequency radio probe circuit provided by an embodiment of the utility model;
[0022] Figure 5 is a circuit diagram of an indicator light module of a low-frequency radio probe circuit provided by an embodiment of the utility model;
[0023] Figure 6 is a circuit diagram of an antenna module of a low-frequency radio probe circuit provided by an embodiment of the utility model;
[0024] Figure 7 is a circuit diagram of a crystal oscillator module of a low-frequency radio probe circuit, wherein Figure 7 (a) is a circuit diagram of a main crystal oscillator module, Figure 7 (b) is a circuit diagram of a low-frequency crystal oscillator module;
[0025] Figure 8 is a circuit diagram of a reset circuit module of a low-frequency radio probe circuit;
[0026] Figure 9 is a circuit diagram of an internal filter module of a low-frequency radio probe circuit;
[0027] Figure 10 is a circuit diagram of a power filter module of a low-frequency radio probe circuit;
[0028] Figure 11 is a circuit diagram of a voltage detection module of a low-frequency radio probe circuit;
[0029] Figure 12 is a circuit diagram of an interface of a low-frequency radio probe circuit, wherein Figure 12 (a) is a circuit diagram of a debugging and burning port, Figure 12 (b) is a circuit diagram of a serial port. DETAILED DESCRIPTION
[0030] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar notations represent the same or similar elements or parts / components having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.
[0031] The low-frequency radio probe circuit of the embodiments of the present application is described below in conjunction with the drawings.
[0032] Figure 1 is a structural schematic diagram of a low-frequency radio probe circuit; Figure 2 is a circuit diagram of a power module of a low-frequency radio probe circuit; Figure 3 is a circuit diagram of a central control module of a low-frequency radio probe circuit; Figure 4 is a circuit diagram of a signal trigger module of a low-frequency radio probe circuit; Figure 5A circuit diagram of an indicating lamp module of a low-frequency radio probe circuit is provided in an embodiment of the utility model; Figure 6 A circuit diagram of an antenna module of a low-frequency radio probe circuit is provided in an embodiment of the utility model; Figure 7 A circuit diagram of a crystal oscillator module of a low-frequency radio probe circuit is provided in an embodiment of the utility model. Figures 1-7 As shown in the figure, the low-frequency radio probe circuit comprises a power module, a central control module connected to the power module, a trigger signal module, an indicating lamp module, and an antenna module and a crystal oscillator module connected to the central control module; wherein the trigger signal module and the indicating lamp module are connected to the central control module; the trigger signal module comprises a radio communication probe, which is electrically connected with a first detection point.
[0033] Specifically, in the power module, a battery can be used for power supply, or an external stabilized power supply can be connected for power supply; in the embodiment of the application, the input end of the power module is 7.2V, and the output is 3.3V.
[0034] The central control module and the antenna module are mainly used for wireless communication with a receiver and converting a trigger signal into a corresponding radio protocol and sending it to the receiver.
[0035] The crystal oscillator module is used as the main clock of the MCU and the clock of the wireless signal, for maintaining the main operation of the MCU and sending a low-frequency wireless signal in cooperation with the internal wireless transceiver of the MCU; in the embodiment of the application, the crystal oscillator module generates a communication signal of 868MHz frequency band.
[0036] When there is no trigger signal, the IO port is in a high flat signal state, and the host MCU does not need to go through other part programs first; when the trigger signal occurs, the IO port becomes a low-level signal external interrupt start, and after software debouncing, it is converted into a corresponding wireless protocol and sent to the receiver, completing the trigger step; the first detection point is used for detecting the trigger voltage.
[0037] The indicating lamp module part lights the light-emitting diode therein according to the current system running state, for indicating the state of the system.
[0038] The radio communication probe K+1 in the trigger signal module needs to be paired with the receiver when used for the first time, after pairing, the radio communication probe is installed with a striker and installed to the tool bit position of the machine tool, and when the machine tool starts, the radio communication probe will be automatically started. When the striker of the radio communication probe contacts the measured object, a trigger signal will be generated, and the internal MCU will send the trigger signal to the receiver according to the specified wireless protocol, and then report to the machine tool control computer, completing the detection work of the probe.
[0039] The low-frequency band radio probe circuit has stronger 868Mhz penetration, signal strength attenuation is reduced by 40-60% than the 2.4GHz scheme, the placing distance and range (about 20-70m) of the receiver are enlarged, and the low-frequency band radio probe circuit is more suitable for use in industrial plants; the 868MHz frequency band device has low density, and the emission power thereof can be strictly limited by regulations, so that the same-frequency interference can be effectively reduced; the 868Mhz works at low frequency and does not need high emission power, and the overall power consumption is reduced by about 35%, and the overall device power consumption is better than that of the 2.4Ghz device.
[0040] Figure 8 The utility model discloses a low-frequency band radio probe circuit's reset circuit module's circuit diagram, as shown in Figure 8 Reset circuit module is connected with the central control module.
[0041] Specifically, the reset circuit module is used for resetting the system after the system triggers and the IO port becomes low level, without power-off restart, so that the use of the system is convenient.
[0042] Figure 9 The utility model discloses a low-frequency band radio probe circuit's internal filter module's circuit diagram, as shown in Figure 10 The utility model discloses a low-frequency band radio probe circuit's power filter module's circuit diagram, as shown in Figures 9-10 Reset circuit module is connected with the central control module.
[0043] Specifically, the internal filter module can be connected with an inductor in series and connected with a plurality of capacitors in parallel, for realizing the function of low dropout regulator (LDO) and having the filtering effect.
[0044] According to an embodiment of the utility model, the central control module includes the chip of CC1310F128RSMR.
[0045] Specifically, CC1310F128RSMR is a powerful processor and is a super low power sensor controller, and can support wireless sensor network access, and is suitable for the scene of the application.
[0046] According to an embodiment of the utility model, the power module includes the voltage stabilizing chip of ME6231A33M3G.
[0047] Specifically, the chip of this model is a voltage stabilizing chip, which stabilizes the input battery voltage. The chip has high precision, low cost, high output stability and low power consumption, and is suitable for the scene of the application.
[0048] According to one embodiment of the utility model, the crystal oscillator module includes main crystal oscillator module and low frequency crystal oscillator module, and the main crystal oscillator module and the low frequency crystal oscillator module are connected with the central control module respectively.
[0049] Specifically, the main crystal oscillator is used as the main clock of MCU and the clock of wireless signal, for maintaining the main operation of MCU and cooperating with the internal wireless transceiver of MCU to send low-frequency wireless signal to penetrate the machine tool. The low-frequency crystal oscillator is used for the operation of MCU in sleep mode, for reducing power consumption and saving power consumption.
[0050] According to one embodiment of the utility model, the main crystal oscillator module and the low frequency crystal oscillator module both include crystal oscillators, the nominal frequency of the crystal oscillator of the main crystal oscillator module is between 20-30MHz, and the nominal frequency of the crystal oscillator of the low frequency crystal oscillator module is between 25-40kHz.
[0051] Specifically, in one embodiment of the application, the crystal oscillator of the main crystal oscillator module is 24MHz, and the crystal oscillator of the low frequency crystal oscillator module is 32.768kHz, with appropriate working power, low sleep power and energy saving.
[0052] According to one embodiment of the utility model, the indicator light module includes a plurality of groups of parallel green light emitting diodes, red light emitting diodes and blue light emitting diodes.
[0053] Specifically, in the embodiment of the application, the indicator light only flashes green light without triggering signal, flashes red light with triggering signal, and flashes blue light when the power is low. Three-color lights are used to indicate the working state, which is more intuitive.
[0054] Figure 11 It is a circuit diagram of a voltage detection module of a low-frequency band wireless probe circuit provided by one embodiment of the utility model, as shown in Figure 11 The voltage detection module includes a second detection point and is connected with the central control module.
[0055] Specifically, the voltage detection module is used for monitoring the running state of the system. For example, when the voltage is detected to be too low, it represents that the battery power is too low, and the electric signal is transmitted to the MCU, and then the indicator light module is controlled to flash blue light to inform the operator. The second detection point is used for detecting the voltage of the power supply end.
[0056] Figure 12 It is a circuit diagram of an interface of a low-frequency band wireless probe circuit provided by one embodiment of the utility model, as shown in Figure 12The debug burning port and the serial port are also shown, and an output voltage terminal of the power module is connected with the central control module through the debug burning port and the serial port.
[0057] Specifically, the debug burning port and the serial port are used for connection and testing of the circuit, which facilitates the operation of the operator and improves the ease of use.
[0058] The above embodiments are the preferred implementation of the present application, and in addition thereto, the present application can be implemented in other ways, and any obvious replacement without departing from the concept of the present application is within the protection scope of the present application.
Claims
1. A low-band radio probe head circuit, characterized by, The application relates to a power module, a central control module connected with the power module, a trigger signal module, an indicator light module, an antenna module and a crystal oscillator module connected with the central control module. The trigger signal module and the indicator light module are connected with the central control module. The trigger signal module comprises a radio communication probe which is electrically connected with a first detection point. A reset circuit module connected with the central control module is further included.
2. A low frequency radio probe head circuit according to claim 1, characterized in that: An internal filter module connected with the central control module and a power filter module connected with the power module are further included.
3. A low band radio probe head circuit according to claim 1, characterized in that: The central control module comprises a chip with a model number of CC1310F128RSMR.
4. A low band radio probe head circuit according to claim 1, characterized in that: The power module comprises a voltage stabilizing chip with a model number of ME6231A33M3G.
5. A low band radio probe head circuit according to claim 1, characterized in that: The crystal oscillator module comprises a main crystal oscillator module and a low-frequency crystal oscillator module, and the main crystal oscillator module and the low-frequency crystal oscillator module are respectively connected with the central control module.
6. A low band radio probe head circuit according to claim 1, characterized in that: The main crystal oscillator module and the low-frequency crystal oscillator module both comprise crystal oscillators, the nominal frequency of the crystal oscillator of the main crystal oscillator module is between 20-30 MHz, and the nominal frequency of the crystal oscillator of the low-frequency crystal oscillator module is between 25-40 kHz.
7. A low band radio probe head circuit according to claim 6, characterized in that: The indicator light module comprises a plurality of groups of parallel green light emitting diodes, red light emitting diodes and blue light emitting diodes.
8. A low-band radio probe circuit according to claim 1, characterized in that: A voltage detection module connected with the input end of the power module is further included, the voltage detection module comprises a second detection point and is connected with the central control module.
9. A low-band radio probe head circuit according to claim 1, characterized in that: A debugging burning port and a serial port are further included, and the output voltage end of the power module is connected with the central control module through the debugging burning port and the serial port.
10. The low-band radio probe circuit according to claim 1, characterized by: