CN212988583U - Intelligent wireless optical power meter based on NRF - Google Patents

Abstract

The utility model discloses an intelligent wireless optical power meter based on NRF, which comprises a shell, a main power supply module, a silicon photocell, an optical power conversion operational amplifier circuit, a main singlechip, a main communication module and a main display module; the silicon photocell, the optical power conversion operational amplifier circuit and the main single chip microcomputer are sequentially connected in series, and the main single chip microcomputer is respectively connected and communicated with the main communication module and the main display module; the main power supply module is respectively connected with the optical power conversion operational amplifier circuit, the main singlechip, the main communication module and the main display module; the main power supply module, the optical power conversion operational amplifier circuit, the main singlechip and the main communication module are all arranged in the inner cavity of the shell; the silicon photocell and the main display module are respectively and fixedly arranged on the outer surface of the shell. The utility model has the advantages of small, the cost is low, measurement accuracy is high, the security performance is strong the suitability, convenient to use supports wireless transmission, the all kinds of high and new technology fields of measuring luminous power of wide application.

Description

Intelligent wireless optical power meter based on NRF

Technical Field

The utility model belongs to the technical field of the optical power measurement, a light power meter is related to, concretely relates to intelligent wireless light power meter based on NRF.

Background

The optical power meter has an indispensable position in the existing optical detection field and optical communication field, and is widely applied to various optical detection systems. The excellent optical power meter of a performance can bring very big facility for the user in the use, and the ordinary optical power meter on the existing market mostly all uses handheld as the owner, but handheld optical power meter has very big inconvenience, detect the place and the manual regulation place is not necessarily all in same position in optic fibre testing process, need maintenance personal to rush over between two points, very big inconvenience has been caused for the user, if can design a wireless optical power meter so these problems will all be solved, thereby improve work efficiency. With the development and popularization of optical communication technology, the optical power meter is applied to the life of people, and the optical power meter provides great convenience for maintaining optical communication equipment and has wide application. However, the requirements for measuring specific optical power in different application places are different, so that it is necessary to research an optical power meter with high precision. This is not only a requirement for life and production, but also a requirement of the whole production industry of the optical power meter. Therefore, the research on the wireless optical power meter has a great significance in both a theoretical level and a practical level.

The Chinese patent discloses a portable optical power meter with a wireless data transmission function, wherein the components comprise an STM32F401CCU6 single chip microcomputer, a BPW34 cuttage type silicon photocell, an OPA37 digital operational amplifier chip, an NRF24L01 radio frequency communication module transmitting end and an OLED display module wiring are connected with a single chip microcomputer host, an NRF24L01 radio frequency communication module receiving end and an OLED display module wiring are connected with a slave machine, and an OPA37 digital operational amplifier chip is connected with a main power module of the host machine (12V). The BPW34 plug-in silicon photocell was connected to an OPA37 digital operational amplifier chip. The wire that links to each other all has insulating protective layer, and this utility model discloses accessible NRF wireless communication module carries out remote data transmission to the optical signal that detects for the measurement of optical power numerical value is more convenient, has solved current optical power meter volume great, with high costs, carry inconveniently, can't remote transmission data, shortcoming such as inefficiency.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a based on NRF intelligence wireless optical power meter has advantages such as small, the cost is low, measurement accuracy is high, the strong suitability of security performance is strong, convenient to use supports wireless transmission, can the all kinds of high new technology fields of measuring luminous power of wide application.

The utility model adopts the technical proposal that: an intelligent wireless optical power meter based on NRF comprises a shell, a main power supply module, a silicon photocell, an optical power conversion operational amplifier circuit, a main singlechip, a main communication module and a main display module;

the silicon photocell, the optical power conversion operational amplifier circuit and the main singlechip are sequentially connected in series, and the main singlechip is respectively connected and communicated with the main communication module and the main display module; the main power supply module is respectively connected with the optical power conversion operational amplifier circuit, the main singlechip, the main communication module and the main display module and is used for providing power for the optical power conversion operational amplifier circuit, the main singlechip, the main communication module and the main display module;

the main power supply module, the optical power conversion operational amplifier circuit, the main singlechip and the main communication module are all arranged in the inner cavity of the shell; the silicon photocell and the main display module are respectively and fixedly arranged on the outer surface of the shell.

The silicon photocell is a BPX61 direct-insert type photodiode and a BPW34 cuttage type silicon photocell, preferably, the silicon photocell is a BPW34 cuttage type silicon photocell, a BPW34 cuttage type silicon photocell is selected for conveniently collecting light power voltage signals, on one hand, the sensitivity is high, and on the other hand, a preposed operational amplifier circuit is convenient to design. The BPW34 cuttage silicon photocell was chosen from the optical power collection period. The silicon photocell is most sensitive to laser with the wavelength of 850nm, and the semi-sensitive visual angle of the detectable spectrum range of 400nm to 1100nm is 60 degrees.

The operational amplifier selected by the digital operational amplifier circuit is an OPA37 digital operational amplifier circuit chip and a CA3140 operational amplifier, preferably, the operational amplifier is an OPA37 digital operational amplifier circuit chip, and because the construction process of the operational amplifier circuit is not easy and a PCB integrated circuit cannot be manufactured due to limited practical working conditions, the OPA37 digital operational amplifier chip is supposed to be adopted, the functions can be achieved, and the operational amplifier circuit is relatively simple and reliable.

The main singlechip is AT89C51 singlechip, STM32F103ZET6 singlechip, STM32F401CCU6 singlechip, and as preferred, the singlechip is STM32F401CCU6 singlechip, and IO is numerous to have high performance, and the real-time strong, low-power consumption is convenient for advantages such as low-voltage operation. An analog-to-digital converter is arranged in the main single chip microcomputer and can convert digital signals into analog signals.

The main communication module is a CC1101 radio frequency communication module and an NRF24L01 radio frequency communication module, preferably, the main communication module is an NRF24L01 radio frequency communication module, and the NRF24L01 radio frequency communication module is small in size, but powerful in function and comprises important devices such as a frequency generator and the like required by wireless communication. The communication channel can be set through a communication protocol in the aspect of selection, and is set by using a hardware program of a single chip microcomputer. The simple configuration condition can be basically linked and communicated with most types of single-chip microcomputers, and the requirements on power consumption are met.

The main display module is an OLED display module. The main power supply module is a +/-12V power supply board.

Preferably, the optical power meter is further provided with a slave machine, and the slave machine is provided with a slave communication module, a slave single chip microcomputer, a slave display module and a slave power supply module;

the slave communication module (6), the slave single chip microcomputer (7) and the slave display module (8) are sequentially connected in series, and are respectively connected with the slave power supply module to obtain electric power.

The slave power supply module is a 5V power supply.

The utility model provides an intelligence wireless optical power meter based on NRF has advantages such as small, the cost is low, measurement accuracy is high, the strong suitability of security performance is strong, convenient to use supports wireless transmission, the high new technology field of all kinds of measured light power of wide application.

Drawings

FIG. 1 is a schematic circuit diagram of the present invention

FIG. 2 is a circuit diagram of the optical power conversion operational amplifier of the present invention

Fig. 3 is a flow chart of the present invention.

Fig. 4 is a zemax optical path design diagram of the homemade optical path design part designed by the present invention.

Detailed Description

To facilitate understanding and practice of the invention for those skilled in the art, the following detailed description of the invention is provided in connection with the accompanying drawings and the embodiments, it being understood that the embodiments described herein are merely illustrative and explanatory of the invention and are not restrictive thereof.

Please refer to fig. 1, the utility model provides an intelligent wireless optical power meter based on NRF, which comprises a housing, a main power module, a silicon photocell 1, an optical power conversion operational amplifier circuit 2, a main singlechip 3, a main communication module 4, and a main display module 5;

the silicon photocell 1, the optical power conversion operational amplifier circuit 2 and the main singlechip 3 are sequentially connected in series, and the main singlechip 3 is respectively connected and communicated with the main communication module 4 and the main display module 5; the main power supply module is respectively connected with the optical power conversion operational amplifier circuit 2, the main singlechip 3, the main communication module 4 and the main display module 5 and is used for providing electric power for the optical power conversion operational amplifier circuit 2, the main singlechip 3, the main communication module 4 and the main display module 5; the main power supply module, the optical power conversion operational amplifier circuit 2, the main singlechip 3 and the main communication module 4 are all arranged in the inner cavity of the shell; the silicon photocell 1 and the main display module 5 are respectively fixedly arranged on the outer surface of the shell.

The optical power meter of the embodiment is also provided with a slave machine, and the slave machine is provided with a slave communication module 6, a slave single chip microcomputer 7, a slave display module 8 and a slave power supply module; the slave communication module 6, the slave singlechip 7 and the slave display module 8 are sequentially connected in series and are respectively connected with the slave power supply module to obtain electric power.

The working process of the embodiment is as follows: the silicon photocell 1 converts light intensity into photocurrent, transmits the photocurrent to the optical power conversion operational amplifier circuit 2, the optical power conversion operational amplifier circuit 2 amplifies the photocurrent, converts data into analog signals and transmits the analog signals to the main singlechip 3, specific values of optical power signals are accurately calculated and displayed on the main display module 5, the transmitting end of the main communication module 4 is connected with the main singlechip 3, the specific values of the optical power signals are received and then transmitted to the receiving end of the slave communication module 6 of the slave machine through the transmitting end, the slave communication module 6 is connected with the slave singlechip 7, and the data are transmitted to the slave singlechip 7 through wireless transmission and then displayed on the slave display module 8.

As shown in fig. 2, the optical power conversion operational amplifier circuit 2 is shown, and it can be known from the operating characteristics of the silicon photocell that the silicon photocell generates a weak photocurrent under the irradiation of light, and forms a voltage after conversion, so that the photocurrent has a proportional relationship with the output voltage, and R2 has the function of amplifying the current signal by 20k times. The capacitor C1 is used to stabilize the circuit and avoid ringing. The resistor R1 is used as a compensation resistor to reduce the bias effect caused by the input current of the operational amplifier, and the parallel C2 capacitor is used for eliminating the noise effect of R1.

Because the data acquisition of the design is only one, namely the light power data, the photoelectric conversion and the signal amplification are completed by the silicon photocell and the pre-operational amplifier circuit, the acquired data information is analog voltage data, and although the IO of the single chip microcomputer is provided with built-in analog-to-digital conversion hardware, an external analog-to-digital conversion chip is required for more accuracy of the analog-to-digital conversion. After the analog-to-digital conversion process is finished, the digital voltage containing the optical power information is directly input to the IO port of the single chip microcomputer, and then the data is calculated to obtain the correct optical power value.

The NRF24L01 radio frequency communication module is actually a wireless communication device that requires programming by both the transceiver and the transceiver. The communication between the communication module and the singlechip adopts an SPI communication protocol. The rate is 10M maximum, and slightly different from a common SPI device, there is one more CE pin to turn on reception, transmission, and to put the device into standby mode.

And (3) data transmission:

the chip's register is set and the "CE" pin needs to be low. The following registers are used:

1. the receive address is written to the transmit address register.

2. And writing the address of the receiving end into the channel address register, and after starting the automatic response, receiving a response signal of the receiving end by the register.

3. And the program controls the on-chip register to open for automatic response.

4. A retransmission register is set, and the number of retransmissions and the time interval are set.

5. The frequency of the transmission channel is set, and the transmission power and rate are set.

6. Setting a configuration register, starting an interrupt and setting a transmission.

If the above registers are set, the configuration of the register for receiving data is needed.

Data reception:

1. the program settings define the acceptance data reception channel, and the register address of the channel.

2. Setting the byte number of the receiving data of the receiving channel

3. Setting registers for accepting, accepting frequency, accepting configuration, turning on interrupts, etc.

4. Pulling up "CE" turns on reception.

As shown in fig. 3, in the design, light intensity is first converted into weak photocurrent from the silicon photocell through a photoelectric conversion effect of the silicon photocell, and because the generated photocurrent is too weak, a suitable pre-operational amplifier circuit needs to be designed by using analog circuit related knowledge to amplify the photocurrent, and because an IO port of the single chip microcomputer identifies voltage, the pre-operational amplifier circuit also has an I-V conversion function while amplifying the photocurrent. Then the singlechip captures the voltage value of the light intensity signal from the silicon photocell, and the singlechip calculates the specific numerical value of the light power signal accurately through the internal program of the singlechip and displays the specific numerical value on a host screen, and transmits the data to the interior of the slave machine through the wireless transmission module and then displays the data on a slave machine display screen.

Carry on self-made light path design by the screen after wireless output accomplishes, can let the staff need not the operation just can look over the data that incline, direct display is on the glasses mirror surface, and the person of facilitating the use judges the operation, thereby be connected this light path design and ordinary glasses and can throw the screen to the glasses lens with the data picture and carry out the portable of data and look over, through the preamble power measurement part throws the screen module with data transmission after obtaining the optical power data, through the catadioptric back, throws concrete data on the mirror surface.

Although the present specification uses terms such as the housing, the main power supply module, the silicon photovoltaic cell 1, the optical power conversion operational amplifier circuit 2, the main chip microcomputer 3, the main communication module 4, the main display module 5, the slave communication module 6, the slave chip microcomputer 7, the slave display module 8, and the slave power supply module, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe the nature of the invention and should not be construed as imposing any additional limitations thereon which would depart from the spirit of the invention.

It should be understood that, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" used in this specification are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. "first", "second", "third" and "fourth" do not denote any sequence relationship, but are merely used for convenience of description. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

It should be understood that the above description of the preferred embodiments is given in some detail, and not as a limitation to the scope of the invention, and that various alternatives and modifications can be devised by those skilled in the art without departing from the scope of the invention as defined by the appended claims.

Claims (7)

1. An intelligent wireless optical power meter based on NRF is characterized in that: the photoelectric conversion circuit comprises a shell, a main power supply module, a silicon photocell (1), a light power conversion operational amplifier circuit (2), a main singlechip (3), a main communication module (4) and a main display module (5);

the silicon photocell (1), the optical power conversion operational amplifier circuit (2) and the main singlechip (3) are sequentially connected in series, and the main singlechip (3) is respectively connected and communicated with the main communication module (4) and the main display module (5); the main power supply module is respectively connected with the optical power conversion operational amplifier circuit (2), the main singlechip (3), the main communication module (4) and the main display module (5) and is used for providing electric power for the optical power conversion operational amplifier circuit (2), the main singlechip (3), the main communication module (4) and the main display module (5);

the main power supply module, the optical power conversion operational amplifier circuit (2), the main singlechip (3) and the main communication module (4) are all arranged in the inner cavity of the shell; the silicon photocell (1) and the main display module (5) are respectively and fixedly arranged on the outer surface of the shell.

2. The NRF-based intelligent wireless optical power meter of claim 1, wherein: the silicon photocell (1) is a BPW34 cuttage silicon photocell.

3. The NRF-based intelligent wireless optical power meter of claim 1, wherein: the chip used by the digital operational amplifier circuit in the optical power conversion operational amplifier circuit (2) is an OPA37 digital operational amplifier chip.

4. The NRF-based intelligent wireless optical power meter of claim 1, wherein: the main singlechip (3) is an STM32F401CCU6 singlechip.

5. The NRF-based intelligent wireless optical power meter of claim 1, wherein: the main communication module (4) is an NRF24L01 radio frequency communication module.

6. The NRF-based intelligent wireless optical power meter of claim 1, wherein: the display module is an OLED display module.

7. An NRF-based intelligent wireless optical power meter according to any of claims 1-6, wherein: the optical power meter is also provided with a slave machine, and the slave machine is provided with a slave communication module (6), a slave single chip microcomputer (7), a slave display module (8) and a slave power supply module;

the slave communication module (6), the slave single chip microcomputer (7) and the slave display module (8) are sequentially connected in series, and are respectively connected with the slave power supply module to obtain electric power.

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