CN215297228U - Ozone digital sensor based on constant voltage - Google Patents
Ozone digital sensor based on constant voltage Download PDFInfo
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- CN215297228U CN215297228U CN202121104945.XU CN202121104945U CN215297228U CN 215297228 U CN215297228 U CN 215297228U CN 202121104945 U CN202121104945 U CN 202121104945U CN 215297228 U CN215297228 U CN 215297228U
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Abstract
The utility model discloses a constant voltage-based ozone digital sensor, which comprises a sensor shell, wherein a constant voltage ozone electrode probe is arranged on the sensor shell, a sensor circuit board is arranged in the sensor shell, and the sensor circuit board comprises a signal processing circuit, a controller, a driving circuit and a signal output circuit; the constant-voltage ozone electrode probe is connected with the signal processing circuit through a cable, and the controller is respectively connected with the signal processing circuit, the driving circuit and the signal output circuit; the effect is as follows: the ozone measuring instrument can quickly and accurately measure ozone in water, does not need to add electrolyte periodically, is convenient and simple to maintain, simultaneously has signal output, does not need to install a gauge outfit, saves cost and is convenient for system integration.
Description
Technical Field
The utility model belongs to the technical field of water quality testing, concretely relates to ozone digital sensor based on constant voltage.
Background
At present, ozone is widely used in the fields of water treatment, air purification, food processing, medical treatment, medicine, aquaculture and the like, and plays a great role in promoting the development of the industries. Ozone disinfection refers to a water treatment technique using ozone as a disinfectant. Ozone is a strong oxidant, after dissolved in water, it can directly or indirectly oxidize inorganic matter and organic matter in water by using a large amount of hydroxyl free radicals and nascent oxygen generated in the reaction, and can enter into the cell of bacteria to oxidize intracellular organic matter, so as to attain the goal of sterilizing, disinfecting and purifying water quality.
In water treatment, ozone in water needs to be detected, and the current common ozone detection modes comprise a test paper colorimetry and a common online ozone detector, which respectively have the following defects:
disadvantage 1: the ozone test paper colorimetric method has large measurement error, needs manual operation and cannot carry out online detection for 24 hours;
and (2) disadvantage: the common online ozone detector needs to be provided with a gauge head or a transmitter, and is not beneficial to system integration.
Meanwhile, the probes of polarography in the market need to be added with electrolyte periodically, and the use is inconvenient.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problems, the present invention provides a constant voltage based ozone digital sensor to overcome the defects of large measurement error and unfavorable system integration in the prior art.
The utility model provides a following technical scheme: a constant voltage based ozone digital sensor comprises a sensor shell, wherein a constant voltage ozone electrode probe is arranged on the sensor shell, a sensor circuit board is arranged in the sensor shell, and the sensor circuit board comprises a signal processing circuit, a controller, a driving circuit and a signal output circuit; the constant-voltage ozone electrode probe is connected with the signal processing circuit through a cable, and the controller is respectively connected with the signal processing circuit, the driving circuit and the signal output circuit.
Preferably, the constant-voltage ozone electrode probe adopts a double platinum ring structure.
Preferably, the sensor shell adopts a PPS sensor shell, and adopts a waterproof structure combining a thread and a waterproof ring.
Preferably, the cable is connected with the constant voltage ozone electrode probe through a wire terminal.
Preferably, the signal processing circuit comprises an operational amplifier and a filter element connected with the operational amplifier, the current signal generated by the constant-voltage ozone electrode probe is transmitted to the input end of the operational amplifier, and the output end of the operational amplifier is connected with the controller.
Preferably, the driving circuit adopts a 485 driving circuit.
Preferably, the 485 driving circuit adopts MAX1348 and its peripheral circuits.
Preferably, the signal output circuit adopts a 4-20MA circuit.
Preferably, the 4-20MA circuit adopts a voltage-to-current chip circuit.
By adopting the technical scheme, the method has the following advantages: the utility model provides an ozone digital sensor based on constant voltage adopts constant voltage measurement's mode, can accurately measure the ozone of aquatic fast, does not need regularly to add electrolyte, and it is convenient simple to maintain, does not need the installation gauge outfit from taking signal output simultaneously, saves the cost, the system integration of being convenient for.
Drawings
Fig. 1 is a schematic diagram of a constant voltage-based ozone digital sensor according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a signal processing circuit according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a driving circuit according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a signal output circuit according to an embodiment of the present invention.
Detailed Description
To make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be made with reference to the accompanying drawings and specific embodiments, and the description herein does not mean that all the subject matters corresponding to the specific examples set forth in the embodiments are cited in the claims.
Referring to fig. 1 to 4, an embodiment of the present invention provides a constant voltage based ozone digital sensor, which includes a sensor housing, the sensor housing is provided with a constant voltage ozone electrode probe, a sensor circuit board is arranged in the sensor housing, and the sensor circuit board includes a signal processing circuit, a controller, a driving circuit and a signal output circuit; the constant-voltage ozone electrode probe is connected with the signal processing circuit through a cable, and the controller is respectively connected with the signal processing circuit, the driving circuit and the signal output circuit.
Specifically, the constant-voltage ozone electrode probe adopts a double platinum ring structure; the method applies negative pulse with specific voltage amplitude between the polarized electrode and the reference electrode to the residual chlorine electrode by using a hardware circuit resistance voltage division mode to realize constant voltage, and specifically selects ozone ions to participate in the reaction so as to enable the ozone ions to generate electrochemical reaction at the cathode of the electrode, thereby forming a current signal in direct proportion to the concentration of ozone.
When the system is implemented, the controller adopts a single chip microcomputer; the sensor shell adopts a PPS sensor shell, and adopts a waterproof structure combining threads and a waterproof ring. The shell is used for fixing a sensor circuit board and is sealed and fixed by epoxy resin, the cable is connected with the constant-voltage ozone electrode probe through a wire terminal, after sealing and waterproof treatment is carried out on the cable and the waterproof ring through threads, a fixing screw is screwed on the cable for fixing the cable, and then the tail part of the cable is also provided with a waterproof structure for wrapping a power line and a signal line in the cable; the cable adopts 6-core wires with shielding.
The signal processing circuit comprises an operational amplifier and a filter element connected with the operational amplifier, a current signal generated by the constant-voltage ozone electrode probe is transmitted to the input end of the operational amplifier, and the output end of the operational amplifier is connected with the controller. It should be noted that, the specific structure of the signal processing circuit is shown in fig. 2, and further includes a related resistor, which is not described herein again.
Further, the driving circuit adopts a 485 driving circuit; as shown in fig. 3, the 485 driver circuit employs MAX1348 and its peripheral circuits; MAX1348 chip, converting TTL level into differential signal A, B; the RX, TX and contrcl pins of the device are connected with a single chip microcomputer, A and B are used as external communication interfaces, and data output is realized in a communication mode; and a terminal resistor is connected between the A port and the B port.
Further, referring to fig. 4, the signal output circuit adopts a 4-20MA circuit; the 4-20MA circuit adopts a voltage-to-current chip circuit. For example, the corresponding chip may employ AD 694;
specifically, the singlechip outputs corresponding voltage by controlling the DA, and provides the voltage to a circuit which is composed of operational amplifiers and converts the voltage into current, and then outputs a current value corresponding to the ozone concentration.
The whole scheme firstly passes through a high-precision operational amplifier, current signals transmitted by the ozone electrode probe are amplified, filtered and the like to finally become detectable voltage signals, then the voltage signals are transmitted to the inside of a single chip microcomputer to be sampled and calculated, the single chip microcomputer stores the calculated ozone concentration value, and a 485 circuit and a 4-20MA circuit are driven to output the ozone concentration value.
Above-mentioned technical scheme adopts the mode of constant voltage measurement, can measure the ozone of aquatic fast accurately, does not need regularly to add electrolyte, and it is convenient simple to maintain, from taking signal output, need not install the gauge outfit simultaneously, saves the cost, the system integration of being convenient for.
Finally, it should be noted that the above description is a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and scope of the present invention.
Claims (9)
1. A constant voltage based ozone digital sensor comprises a sensor shell, and is characterized in that a constant voltage ozone electrode probe is arranged on the sensor shell, a sensor circuit board is arranged in the sensor shell, and the sensor circuit board comprises a signal processing circuit, a controller, a driving circuit and a signal output circuit; the constant-voltage ozone electrode probe is connected with the signal processing circuit through a cable, and the controller is respectively connected with the signal processing circuit, the driving circuit and the signal output circuit.
2. The constant-voltage ozone digital sensor is characterized in that the constant-voltage ozone electrode probe adopts a double platinum ring structure.
3. The constant-voltage ozone digital sensor is characterized in that the sensor shell is a PPS sensor shell, and a waterproof structure combining threads and a waterproof ring is adopted.
4. The constant voltage ozone based digital sensor according to claim 3, wherein the cable is connected to the constant voltage ozone electrode probe by a wire terminal.
5. The constant-voltage-based ozone digital sensor according to any one of claims 1 to 4, wherein the signal processing circuit comprises an operational amplifier and a filter element connected with the operational amplifier, a current signal generated by the constant-voltage ozone electrode probe is transmitted to an input end of the operational amplifier, and an output end of the operational amplifier is connected with the controller.
6. The constant-voltage ozone digital sensor is characterized in that the driving circuit adopts a 485 driving circuit.
7. The constant-voltage ozone digital sensor is characterized in that the 485 driving circuit adopts MAX1348 and peripheral circuits thereof.
8. The constant-voltage ozone digital sensor is characterized in that the signal output circuit adopts a 4-20MA circuit.
9. The constant-voltage ozone digital sensor is characterized in that the 4-20MA circuit adopts a voltage-to-current chip circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121104945.XU CN215297228U (en) | 2021-05-20 | 2021-05-20 | Ozone digital sensor based on constant voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121104945.XU CN215297228U (en) | 2021-05-20 | 2021-05-20 | Ozone digital sensor based on constant voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215297228U true CN215297228U (en) | 2021-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121104945.XU Active CN215297228U (en) | 2021-05-20 | 2021-05-20 | Ozone digital sensor based on constant voltage |
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| CN (1) | CN215297228U (en) |
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2021
- 2021-05-20 CN CN202121104945.XU patent/CN215297228U/en active Active
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