阅读说明：本技术 一种便携式臭氧浓度检测仪 (Portable ozone concentration detector ) 是由 陈晓琪 陈杰 李文超 于 2018-07-26 设计创作，主要内容包括：一种便携式臭氧浓度检测仪,属于传感器检测技术领域,是主要由传感器采集模块、外界存储器、微处理器、键盘模块、声光报警模块、LCD显示模块、串行通信接口和上位机组成的,其特征在于：所述传感器采集模块与微处理器相连接,外界存储器和微处理器相连接,键盘模块与微处理器相连接,串行通信接口用于连接微处理器和上位机以实现通信,本发明的便携式臭氧浓度检测仪,使用便携,操作简单,稳定可靠,能精确测得臭氧浓度,且成本及功耗较低,能有效帮助人类有效利用臭氧。(The utility model provides a portable ozone concentration detector, belongs to sensor detection technical field, is mainly by sensor acquisition module, external memory, microprocessor, keyboard module, audible-visual alarm module, LCD display module, serial communication interface and host computer constitution, its characterized in that: the portable ozone concentration detector is portable in use, simple in operation, stable and reliable, capable of accurately measuring the ozone concentration, low in cost and power consumption and capable of effectively helping people to effectively utilize ozone.)

1. The utility model provides a portable ozone concentration detector, is mainly by sensor acquisition module, external memory, microprocessor, keyboard module, audible-visual alarm module, LCD display module, serial communication interface and host computer constitution, its characterized in that: the sensor acquisition module is connected with the microprocessor, the external memory is connected with the microprocessor, the keyboard module is connected with the microprocessor, the sound-light alarm module and the LCD display module are both arranged at the output end of the microprocessor, and the serial communication interface is used for connecting the microprocessor and the upper computer to realize communication.

2. The portable ozone concentration detector of claim 1, wherein: the sensor acquisition module comprises a sensor peripheral circuit and a signal processing circuit, wherein the signal processing circuit has a certain basic current after the sensor is biased, so that the output voltage is not zero when the concentration of the gas to be detected is zero, and a zero adjusting circuit is added for improving the output precision of the system; in order to prevent the weak signal from being disturbed by external interference signals in the transmission process, the circuit and the sensor are integrated, and the concentration signal is used by an ADC in an LPC2210 chip after the processing of a zeroing circuit, an amplifying circuit and a filtering circuit.

3. The portable ozone concentration detector of claim 1, wherein: the input level and the output level of the LPC2210 are TTL levels, and the PC is configured with an RS232 standard serial interface, so that the electrical specifications of the serial communication interface and the PC are inconsistent. The SP3232E chip is used for RS232 level conversion, an efficient charge pump is built in the SPS3232E chip, the operation voltage is 3.3V, only a capacitor of 0.1 muF is needed for operation, and the charge pump allows SP3222E to transmit signals conforming to RS232 at a certain voltage within +3.3V to + 5.0V.

Technical Field

The invention relates to a portable ozone concentration detector, and belongs to the technical field of sensor detection.

Background

Ozone, as a strong non-pollution oxidant, has been widely used in the industries of medicine, hygiene, food, breeding, chemical production, air purification, sewage treatment, drinking water sterilization and disinfection, etc., and has achieved remarkable effects, and the application scale thereof is getting larger and larger. In use, if the concentration of ozone is too high, the cost of equipment is increased and the ozone is harmful to human bodies, and if the concentration of ozone is too low, satisfactory effect is difficult to obtain. Therefore, the concentration of ozone must be strictly controlled in many occasions so as to achieve the purposes of sterilization and disinfection and no harm to human health. The invention develops a portable ozone concentration detector.

Disclosure of Invention

In order to overcome the defects, the invention provides a portable ozone concentration detector.

The invention is realized by the following technical scheme: the utility model provides a portable ozone concentration detector, is mainly by sensor acquisition module, external memory, microprocessor, keyboard module, audible-visual alarm module, LCD display module, serial communication interface and host computer constitution, its characterized in that: the sensor acquisition module is connected with the microprocessor, the external memory is connected with the microprocessor, the keyboard module is connected with the microprocessor, the sound-light alarm module and the LCD display module are both arranged at the output end of the microprocessor, and the serial communication interface is used for connecting the microprocessor and the upper computer to realize communication.

The sensor acquisition module comprises a sensor peripheral circuit and a signal processing circuit, wherein the signal processing circuit has a certain basic current after the sensor is biased, so that the output voltage is not zero when the concentration of the gas to be detected is zero, and a zero adjusting circuit is added for improving the output precision of the system; in order to prevent the weak signal from being disturbed by external interference signals in the transmission process, the circuit and the sensor are integrated, and the concentration signal is used by an ADC in an LPC2210 chip after the processing of a zeroing circuit, an amplifying circuit and a filtering circuit.

The input level and the output level of the LPC2210 are TTL levels, and the PC is configured with an RS232 standard serial interface, so that the electrical specifications of the serial communication interface and the PC are inconsistent. The SP3232E chip is used for RS232 level conversion, an efficient charge pump is built in the SPS3232E chip, the operation voltage is 3.3V, only a capacitor of 0.1 muF is needed for operation, and the charge pump allows SP3222E to transmit signals conforming to RS232 at a certain voltage within +3.3V to + 5.0V.

The invention has the advantages that: the portable ozone concentration detector is portable in use, simple to operate, stable and reliable, capable of accurately measuring the ozone concentration, low in cost and power consumption and capable of effectively helping people to effectively utilize ozone.

Drawings

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

In the figure, the device comprises a sensor acquisition module 1, an external memory 2, a microprocessor 3, a keyboard module 4, a sound-light alarm module 5, an LCD display module 6, a serial communication interface 7 and an upper computer 8.

Detailed Description

The utility model provides a portable ozone concentration detector, is mainly by sensor acquisition module 1, external memory 2, microprocessor 3, keyboard module 4, audible and visual alarm module 5, LCD display module 6, serial communication interface 7, host computer 8 and neural network identification module 9 and constitutes its characterized in that: the sensor acquisition module 1 is connected with the microprocessor 3, the external memory 2 is connected with the microprocessor 3, the keyboard module 4 is connected with the microprocessor 3, the sound-light alarm module 5 and the LCD display module 6 are both arranged at the output end of the microprocessor 3, and the serial communication interface 7 is used for connecting the microprocessor 3 and the upper computer 8 to realize communication.

The sensor acquisition module 1 is characterized in that the ozone concentration acquisition module comprises a sensor peripheral circuit and a signal processing circuit, wherein the signal processing circuit has a certain basic current after the sensor is biased, so that the output voltage is not zero when the concentration of the gas to be detected is zero, and a zero adjusting circuit is added for improving the output precision of the system; in order to prevent the weak signal from being disturbed by external interference signals in the transmission process, the circuit and the sensor are integrated, and the concentration signal is used by an ADC in an LPC2210 chip after the processing of a zeroing circuit, an amplifying circuit and a filtering circuit.

The serial communication interface 7 has different electrical specifications because the input and output levels of the LPC2210 are TTL levels, and the PC is configured with an RS232 standard serial interface. The SP3232E chip is used for RS232 level conversion, an efficient charge pump is built in the SPS3232E chip, the operation voltage is 3.3V, only a capacitor of 0.1 muF is needed for operation, and the charge pump allows SP3222E to transmit signals conforming to RS232 at a certain voltage within +3.3V to + 5.0V.

When the device works, the ozone sensor MembraporO is utilized₃C-5, ozone concentration signal is due to odorThe oxygen concentration acquisition module acquires the ozone, inputs the ozone into an analog-digital converter after primary amplification, zero setting, secondary amplification and filtering, converts the oxygen into digital quantity, hands the digital quantity to 32-bit PHILIPS LPC2210 to process, stores the processing result in a peripheral expansion memory, selects CMO S multifunctional FlashSST39VF160 produced by American SST company as the expansion memory, compares the detected ozone concentration value with a preset alarm value, simultaneously displays the concentration value through a display JM12864F of the display module, and gives out an audible and visual alarm when the concentration value is detected to exceed the alarm value. The user can reset the alarm value by the non-coding key. The bistable trigger circuit of the instrument power supply consists of two Schmitt triggers, two capacitors, two diodes and four resistors; the delay circuit mainly comprises a key, a capacitor, two resistors, a diode and two Schmidt triggers; the 9V to 5V voltage is due to the amplifier circuit being powered.

It will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in the embodiments described above without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims.