Self-correcting environment detection equipment, zero point calibration method and concentration calibration method

Abstract

The invention discloses a self-correcting environment detection device, a zero calibration method and a concentration calibration method.The self-correcting environment detection device comprises a box body, a controller and a first detection gas circuit, a lower adapter shell is fixed outside the box body and used for being connected with a nitrogen source, and the first detection gas circuit is connected with the controller; or is used for being detachably connected with an upper adapter shell connected to the lower part of the probe rod; a zero calibration module is arranged on the controller; when the lower adapter shell is connected with a nitrogen gas source and the zero calibration module is triggered, the controller controls the first pump body to suck nitrogen gas into the first detection gas path, and zero calibration is carried out on various gas concentration sensors on the first detection gas path; the controller has the advantages that a user only needs to prepare a nitrogen source, under the condition that zero drift occurs to the sensor, the nitrogen source is connected to the lower adapter shell, a detector triggers the zero calibration module on the controller, zero calibration can be automatically carried out, and after zero calibration is completed, equipment can return to normal operation.

Description

Technical Field

[0001] The present invention relates to the technical field of gas detection equipment, and particularly to a self-correcting environmental detection device, a zero-point calibration method, and a concentration calibration method. Background Art

[0002] In modern society, with the acceleration of the industrialization process, the air environmental safety situation is becoming more and more serious, and the air quality is not optimistic. In particular, industries such as petroleum, metallurgy, cement, chemical industry, and coal mines will produce a large amount of harmful gases. Once there is a leakage of harmful gases or a production safety accident, it will cause serious harm to the surrounding ecological environment and damage people's health.

[0003] Due to the long-term operation of environmental detection equipment in a complex environment, the sensors of the equipment will have a zero-point drift phenomenon, resulting in inaccurate detection data, and zero-point calibration needs to be carried out in a timely manner. The conventional operation is that the equipment engineer remotely guides the detector and remotely controls the environmental detection equipment to perform zero-point calibration. However, since some environmental detection equipment works in mines with weak or no signal, remote control cannot be carried out, resulting in the environmental detection equipment not being repaired in a timely manner, which may cause serious consequences and urgent improvement is needed. Summary of the Invention

[0004] The problem to be solved by the present invention is to provide a self-correcting environmental detection device, a zero-point calibration method, and a concentration calibration method, which can perform self-correcting operations in the case of zero-point drift of the sensor, and after the zero-point calibration is completed, the equipment can resume normal operation.

[0005] One technical solution adopted by the present invention to solve the above problems is: a self-correcting environmental detection device, including a box body, a controller is provided inside the box body, a first detection gas path is provided on the box body, a probe for sucking the gas to be detected is arranged outside the box body, a first pump body and a detection gas chamber are provided on the first detection gas path inside the box body, a gas concentration sensor is provided on the detection gas chamber, the first pump body and the gas concentration sensor are respectively electrically connected to the controller, a lower adapter shell is fixed outside the box body, the lower adapter shell is used to connect with a nitrogen gas source, or used to be detachably connected with an upper adapter shell connected under the probe; a zero-point calibration module is provided on the controller;

[0006] When the lower adapter shell is connected to the nitrogen gas source and the zero-point calibration module is triggered, the controller controls the first pump body to suck nitrogen gas into the first detection gas path to perform zero-point calibration on various gas concentration sensors on the first detection gas path.

[0007] Compared with the prior art, the advantages of the present self-correcting environmental detection device are that zero-point calibration can be performed in the case of zero-point drift of the sensor, and the user only needs to prepare nitrogen gas. After the zero-point calibration is completed, the equipment can resume normal operation.

[0008] Preferably, the lower adapter housing is also used to connect to a standard gas source, and a concentration calibration module is provided on the controller;

[0009] When the lower adapter housing is connected to the standard gas source and the concentration calibration module is triggered, the controller controls the first pump to suck the standard gas into the first detection gas path to calibrate the gas concentration sensors on the first detection gas path. Users need to regularly calibrate the concentration of the equipment to ensure the accuracy of the gas concentration detected by the equipment.

[0010] As an improvement, a wire mesh filter column is filled in the accommodating cavity formed by the lower adapter housing and the upper adapter housing. The wire mesh filter column has complex gaps, which can ensure that the gas to be detected passes through, and can probably intercept large-particle dust, so as to prevent the filter on the first detection gas path from being blocked, extend the service life of the filter element of the filter, reduce the frequency of replacing the filter element of the filter, and thus reduce the use cost.

[0011] As an improvement, a booster pump is provided on the first detection gas path. The booster pump is electrically connected to the controller and is used to increase a certain pressure to the first detection gas path so that the airflow flowing into the detection gas chamber is at a standard air pressure. It is used to ensure the stable flow rate into the detection gas chamber to ensure the normal performance of each gas concentration sensor and the accuracy of the detection data.

[0012] As an improvement, a barometer is provided outside the box body. The barometer is electrically connected to the controller, and the controller is used to adjust the working power of the booster pump according to the air pressure value outside the box body detected by the barometer. It can automatically complete the pressure regulation work and avoid the defects of manual operation errors or lack of experience.

[0013] As an improvement, the first pump is fixed on the lining plate inside the rear plate of the box body. The lining plate is hung on four convex columns of the rear plate. The first filter and the second filter on the first detection gas path are respectively arranged on both sides of the first pump and are suspended by the support of the first pump;

[0014] The structure of the second filter is the same as that of the first filter. The first filter includes an upper cover, a lower housing and a filter element. An air inlet joint and an air outlet joint are provided on the upper cover. The filter element is detachably connected to the upper cover, and the lower housing is detachably connected to the upper cover. It is used to facilitate the installation of the first detection gas path and the replacement and maintenance of the filter elements of the first filter and the second filter.

[0015] As an improvement, a first temperature sensor is installed outside the box body, a second temperature sensor and an automatic heat tracing device are arranged inside the box body, the first temperature sensor, the second temperature sensor and the automatic heat tracing device are respectively electrically connected to a controller, and the controller is used to turn on the automatic heat tracing device when the temperature outside the box body detected by the first temperature sensor is lower than the start heat tracing threshold value, and the controller is used to turn off the automatic heat tracing device when the temperature inside the box body detected by the second temperature sensor reaches the stop heat tracing threshold value. Ensure that the first detection gas path can also operate normally under low external temperature, detect accurate data, thus avoiding data distortion, and be able to issue an alarm in time when a dangerous situation occurs outside the box body.

[0016] As an improvement, a second detection gas path is also arranged on the box body, an inhalation elbow, a second pump body and a dust concentration sensor are arranged on the second detection gas path, the inhalation port of the inhalation elbow is arranged downward, and the second pump body and the dust concentration sensor are respectively electrically connected to the controller. The gas path seriously polluted by dust is arranged separately to extend the normal working time of the first detection gas path and reduce the maintenance frequency of the first detection gas path.

[0017] Another technical solution adopted by the present invention to solve the above problems is: a zero-point calibration method for a self-correcting environmental detection device, specifically including the following steps:

[0018] Connect the nitrogen gas source to the lower adapter housing and access the first detection gas path;

[0019] Click to start zero-point calibration on the touch screen of the above self-correcting environmental detection device to trigger the zero-point calibration module;

[0020] The controller controls the first pump body to suck nitrogen gas into the first detection gas path to perform zero-point calibration on various gas concentration sensors on the first detection gas path;

[0021] Remove the nitrogen gas source from the lower adapter housing, plug a wire mesh filter column into the lower adapter housing, install the upper adapter housing and the probe rod above it, and click on the touch screen to enter the normal working mode.

[0022] Compared with the prior art, the advantage of this zero-point calibration method is that the operation of zero-point calibration is relatively convenient and does not require professional knowledge of sensor zero-point calibration.

[0023] Another technical solution adopted by the present invention to solve the above problems is: a concentration calibration method for a self-correcting environmental detection device, specifically including the following steps:

[0024] Connect the standard gas source to the lower adapter housing and access the first detection gas path;

[0025] Click to start concentration calibration on the touch screen of the above self-correcting environmental detection device to trigger the concentration calibration module;

[0026] The controller controls the first pump body to suck in the standard gas into the first detection gas path to calibrate the concentrations of various gas concentration sensors on the first detection gas path;

[0027] Remove the standard gas source from the lower adapter housing, insert a wire mesh filter column into the lower adapter housing, install the upper adapter housing and the probe rod above it, and click on the touch screen to enter the normal working mode.

[0028] Compared with the prior art, the advantage of this concentration calibration method is that the operation of concentration calibration is relatively convenient and does not require professional knowledge of sensor concentration calibration. Brief Description of the Drawings

[0029] Figure 1 is a three-dimensional schematic diagram of the present invention.

[0030] Figure 2 is a bottom three-dimensional schematic diagram of the present invention.

[0031] Figure 3 is a three-dimensional schematic diagram of the present invention (omitting the door panel).

[0032] Figure 4 is a schematic diagram of the control circuit of the present invention.

[0033] Figure 5 is an exploded view of the adapter of the present invention.

[0034] Figure 6 is a partial exploded view of the first filter of the present invention. Detailed Description of the Preferred Embodiment

[0035] The following describes the exemplary embodiments of the present invention with reference to the accompanying drawings. Various details of the embodiments of the present invention are included to facilitate understanding, and they should be considered merely exemplary. Therefore, those of ordinary skill in the art should recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present invention. Similarly, for clarity and conciseness, the description below omits the description of well-known functions and structures.

[0036] This preferred embodiment is Figures 1 to 4 shown as a self-correcting environmental detection device for detecting gas concentration and dust concentration, including a box body 1 and rollers 2 at the bottom for facilitating pushing and moving, a telescopic pull rod 3 is installed outside the rear plate of the box body 1 for facilitating pulling on a flat road, and handles 4 are installed on both upper sides of the box body 1 for facilitating single-handed or double-handed lifting and moving on a complex road.

[0037] Outside the box body 1, there is a barometer and a first temperature sensor. Inside the box body 1, there are a battery compartment, a second temperature sensor, a controller, and a storage module. The barometer, the first temperature sensor, the second temperature sensor, and the storage module are electrically connected to the controller. The power supply battery in the battery compartment is electrically connected to the controller. The controller is provided with a power detection circuit and a voltage detection circuit for the power supply battery. When the power detection circuit monitors that the power of the power supply battery is insufficient, the device will issue a low power alarm to prompt the user to charge. When the voltage detection circuit monitors that the voltage of the power supply battery is insufficient, the device will issue a voltage insufficient alarm to prompt to replace the power supply battery.

[0038] In this embodiment, on the box body 1, there is a first detection gas path 10 for detecting the concentration of toxic and harmful gases. The first detection gas path 10 specifically includes a probe 11, a connector 13, a first filter 14, a first pump 15, a second filter 16, a booster pump 17, a first detection gas chamber 18, and a second detection gas chamber 19 connected by pipelines. The gas concentration sensors on the first detection gas chamber 18 and the second detection gas chamber 19, the first pump 15, and the booster pump 17 are respectively electrically connected to the controller. Among them, the probe 11 and the connector 13 are arranged on the outer top plate of the box body 1. The first filter 14, the first pump 15, the second filter 16, the booster pump 17, the first detection gas chamber 18, the second detection gas chamber 19, and the gas concentration sensors are arranged inside the box body 1. The air outlet of the first detection gas path 10 is arranged under the bottom plate of the box body 1.

[0039] Among them, for sampling balance, the top end of the probe 11 is a horn-shaped air inlet, and a dust-proof cover 12 is welded on the horn-shaped air inlet through a support column to prevent falling stones from entering the first detection gas path 10. If stones fall into the probe 11, it will change the air intake volume and flow rate of the first detection gas path 10, deviating from the normal working parameters of the device. Here, the dust-proof cover 12 is in an inverted disk shape.

[0040] Preferably, as shown in Figure 5 , the connector 13 is assembled by an upper adapter shell 131 and a lower adapter shell 132. The upper adapter shell 131 and the lower adapter shell 132 are detachably connected. The upper adapter shell 131 is communicated with and fixed to the probe 11. The lower adapter shell 132 is fixed to the top plate of the box body. The lower adapter shell 132 is communicated with the first filter 14 through a pipeline. A wire mesh filter column 133 is filled in the accommodation cavity formed between the upper adapter shell 131 and the lower adapter shell 132. The wire mesh filter column 133 is cylindrical and has a low cost. The wire mesh filter column 133 has complex gaps, which can ensure the passage of the detected gas and can probably intercept large-particle dust to avoid blocking the first filter 14, thereby prolonging the service life of the first filter 14 and the second filter 16 and reducing the use cost.

[0041] In this embodiment, the lower adapter housing 132 can be used to connect to a nitrogen gas source for zero calibration of each gas concentration sensor, and can also be used to connect to a standard gas source for concentration calibration of the gas concentration sensor.

[0042] In this embodiment, the first filter 14, the first pump body 15, the second filter 16, and the booster pump 17 are arranged below the shelf. The first pump body 15 is fixed on the liner inside the rear plate of the box body 1, and the liner is hung on four protruding posts of the rear plate. The first filter 14, the second filter 16, and the booster pump 17 are supported by the first pump body 15 and suspended in the space below the shelf.

[0043] In this embodiment, the structure of the second filter 16 is the same as that of the first filter 14. The first filter 14 Figure 6 as shown includes an upper cover 141, a lower housing 142, and a filter element 143. An air inlet joint 144 and an air outlet joint 145 are arranged on the upper cover 141. The filter element 143 is detachably connected to the upper cover 141, and the lower housing 142 is detachably connected to the upper cover 141. When routinely replacing the filter element 143, first remove the lower housing 142 from the upper cover 141, then replace it with a new filter element 143, and then assemble the lower housing 142 and the upper cover 141. The maintenance operation is relatively fast.

[0044] The box body 1 is also provided with a second detection gas path 20. The second detection gas path 20 is provided with a suction elbow 21, a second pump body 22, and a dust concentration sensor. The second pump body 22 and the dust concentration sensor are respectively electrically connected to the controller. The suction elbow 21 is arranged on the outer top plate of the box body 1, and the air inlet of the suction elbow 21 is arranged downward. The second pump body 22 is arranged on the shelf inside the box body 1, and the air outlet of the second detection gas path 20 is also arranged below the bottom plate of the box body 1.

[0045] To ensure that each sensor and functional device inside the box body 1 can work normally, the environmental detection device is provided with a low-temperature threshold, and the automatic heating device is started when the first temperature sensor detects that the external temperature is lower than the set low-temperature threshold. The automatic heating device is arranged inside the box body 1 and installed below the shelf. The automatic heating device is electrically connected to the controller. The automatic heating device transfers heat to the first detection gas chamber 18, the second detection gas chamber 19, and the second pump body 22 through the shelf, ensuring the normal operation of the first detection gas chamber 18, the second detection gas chamber 19, and the second pump body 22. The automatic heating device adjusts the temperature inside the box body 1 to ensure the normal operation of the first pump body 15 and the booster pump 17. In this embodiment, the automatic heating device is a graphene heating plate, and the graphene heating plate has a thin thickness and does not occupy the assembly space inside the box body 1.

[0046] In this embodiment, a noise sensor 7, an antenna 8, and an alarm lamp 9 are installed on the outer top plate of the box body 1. The noise sensor 7 is electrically connected to the controller and is used to monitor the environmental noise situation; the antenna 8 is electrically connected to the controller through a communication module and is used for the controller to establish remote communication with the cloud platform, and it is also convenient for the inspector to access the controller with a mobile device to retrieve and access data; the alarm lamp 9 is electrically connected to the controller and is used to issue various alarms.

[0047] Here, the controller is provided with a zero calibration module. When the sensor has a zero drift, zero calibration is required, and the user can complete the zero calibration through the menu guidance on the touch screen. The specific steps of zero calibration are as follows:

[0048] Connect the nitrogen gas source to the lower adapter shell 132 and access the first detection gas path 10;

[0049] Click to start zero calibration on the touch screen to trigger the zero calibration module;

[0050] The controller controls the first pump body 15 to suck nitrogen gas into the first detection gas path 10 to perform zero calibration on various gas concentration sensors on the first detection gas path 10;

[0051] Remove the nitrogen gas source from the lower adapter shell 132, insert a wire mesh filter column 133 into the lower adapter shell 132, install the upper adapter shell 131 and the probe 11 above it, and click on the touch screen to enter the normal working mode.

[0052] Here, the controller is also provided with a concentration calibration module. To ensure the accuracy of the sensor, it is necessary to regularly calibrate the sensor with a standard gas, and the user can complete the concentration calibration through the menu guidance on the touch screen. The specific steps of concentration calibration are as follows:

[0053] Connect the standard gas source to the lower adapter shell 132 and access the first detection gas path 10;

[0054] Click to start concentration calibration on the touch screen to trigger the concentration calibration module;

[0055] The controller controls the first pump body 15 to suck the standard gas into the first detection gas path 10 to perform concentration calibration on various gas concentration sensors on the first detection gas path 10;

[0056] Remove the standard gas source from the lower adapter shell 132, insert a wire mesh filter column 133 into the lower adapter shell 132, install the upper adapter shell 131 and the probe 11 above it, and click on the touch screen to enter the normal working mode.

[0057] In addition, the user can see various key parameters of the device on the touch screen: the status of each sensor, the communication status of the internal controller motherboard, the pump status, the tracing heating status, the 4G signal strength, the remaining power of the power supply battery, the temperature inside the box, the temperature of the battery compartment, and the voltage of the power supply battery. When a fault occurs, each parameter of the system can effectively help to determine the cause of the fault.

[0058] The parameter settings include: the tracing heating start threshold (low temperature threshold), the tracing heating stop threshold (high temperature threshold), the boosting level, and the alarm value.

[0059] The above specific implementation manners do not constitute a limitation on the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub - combinations and substitutions can occur depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A self-correcting environmental detection device, comprising a box, a controller is arranged in the box, a first detection gas path is arranged on the box, a probe rod for inhaling the detected gas in the first detection gas path is arranged outside the box, a first pump body and a detection gas chamber in the box are arranged on the first detection gas path, a gas concentration sensor is arranged on the detection gas chamber, the first pump body and the gas concentration sensor are electrically connected to the controller respectively, characterized in that: A lower transfer shell is fixed outside the box, and the lower transfer shell is used to be connected to a nitrogen gas source, or to be detachably connected to an upper transfer shell connected below the probe rod; a zero point calibration module is provided on the controller; When the lower adapter shell is connected to the nitrogen gas source and the zero point calibration module is triggered, the controller controls the first pump body to absorb nitrogen into the first detection gas path to perform zero point calibration on various gas concentration sensors on the first detection gas path.

2. A self-correcting environmental detection device according to claim 1, characterized in that: The lower adapter shell is also used to connect to a standard gas source, and the controller is provided with a concentration calibration module; When the lower adapter shell is connected to the standard gas source and the concentration calibration module is triggered, the controller controls the first pump body to absorb the standard gas into the first detection gas path to perform concentration calibration on various gas concentration sensors on the first detection gas path.

3. A self-correcting environment detection device according to claim 1 or 2, characterized in that: The accommodating cavity formed by the lower adapter shell and the upper adapter shell is filled with a wire mesh filter column.

4. A self-correcting environment detection device according to claim 1 or 2, characterized in that: The first detection air path is provided with a booster pump, which is electrically connected to the controller and is used to increase a certain pressure to the first detection air path so that the air flow flowing into the detection air chamber is at a standard air pressure.

5. A self-correcting environment detection device according to claim 4, characterized in that: A barometer is disposed outside the box body, and the barometer is electrically connected to a controller. The controller is used to adjust the working power of the booster pump according to the air pressure value outside the box body detected by the barometer.

6. A self-correcting environment detection device according to claim 1 or 2, characterized in that: The first pump body is fixed on a lining plate in the rear plate of the box body, and the lining plate is hung on four convex pillars of the rear plate. The first filter and the second filter on the first detection gas path are respectively arranged on both sides of the first pump body and are supported by the first pump body and are suspended in the air. The structure of the second filter is the same as that of the first filter. The first filter includes an upper cover, a lower shell and a filter element. The upper cover is provided with an air inlet connector and an air outlet connector. The filter element is detachably connected to the upper cover, and the lower shell is detachably connected to the upper cover.

7. A self-correcting environment detection device according to claim 1 or 2, characterized in that: A first temperature sensor is installed outside the box body, and a second temperature sensor and an automatic heating device are arranged inside the box body. The first temperature sensor, the second temperature sensor and the automatic heating device are electrically connected to a controller respectively. The controller is used to start the automatic heating device when the temperature outside the box body detected by the first temperature sensor is lower than the heating start threshold. The controller is used to turn off the automatic heating device when the temperature inside the box body detected by the second temperature sensor reaches the heating stop threshold.

8. A self-correcting environment detection device according to claim 1 or 2, characterized in that: The box body is also provided with a second detection air circuit, on which a suction elbow, a second pump body and a dust concentration sensor are arranged. The suction port of the suction elbow is arranged downward, and the second pump body and the dust concentration sensor are electrically connected to the controller respectively.

9. A zero point calibration method for a self-correcting environmental detection device, characterized in that: The specific steps include: Connect the nitrogen gas source to the lower adapter shell and connect to the first detection gas path; Clicking on the touch screen of the self-correcting environmental detection device according to any one of claims 3 to 8 to start zero-point calibration triggers the zero-point calibration module; The controller controls the first pump body to absorb nitrogen into the first detection gas path, and performs zero point calibration on various gas concentration sensors on the first detection gas path; Remove the nitrogen gas source from the lower transfer shell, insert the wire mesh filter column into the lower transfer shell, install the upper transfer shell and the probe rod above it, and click the touch screen to enter the normal working mode.

10. A concentration calibration method for a self-correcting environmental detection device, characterized in that: The specific steps include: Connect the standard gas source to the lower adapter shell and connect to the first detection gas path; Clicking on the touch screen of the self-correcting environmental detection device according to any one of claims 3 to 8 to start concentration calibration triggers the concentration calibration module; The controller controls the first pump body to absorb standard gas into the first detection gas path, and performs concentration calibration on various gas concentration sensors on the first detection gas path; Remove the standard gas source from the lower adapter shell, insert the wire mesh filter column into the lower adapter shell, install the upper adapter shell and the probe rod above it, and click the touch screen to enter the normal working mode.

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