Pump suction type handheld detector

Abstract

The utility model relates to a pump suction type handheld detector which detects the concentration of harmful gas and oxygen through a detection module, a micro-control module and a communication module so as to detect the harmful gas in a limited space, meanwhile, the safety of the working environment of operators is ensured, a positioning module is used for obtaining a position signal of the handheld detector in real time, and the safety of the operators is ensured. The position condition of an operator can be mastered in real time, the operator can be guided conveniently, and rescue actions can be implemented quickly and effectively in an emergency.

Description

Technical Field

[0001] The utility model relates to a pump-suction type handheld detector, belonging to the technical field of gas detection. Background Art

[0002] Gas detectors are increasingly used in industrial production, environmental protection, and daily life. Especially in confined spaces, due to poor air circulation, gas concentrations can easily reach dangerous levels, and various harmful gases may exist, such as carbon monoxide, carbon dioxide, ammonia, hydrogen sulfide, etc. These gases may come from process, chemical reaction, corrosion or other activities. If these gases exceed the safe concentration, they will cause serious harm to human health. Therefore, safety regulations in many countries and regions require that harmful gas detection must be carried out when working in confined spaces, and corresponding safety measures must be formulated.

[0003] Handheld gas detectors are small and light, easy to carry, convenient for on-site operation and movement, and are widely used for gas detection in confined space operations. Existing handheld gas detectors do not have a positioning function, so when operators are working in a confined space, supervisors do not know their exact position and direction in the confined space, and are unable to convey their position and status to the operators to help them better plan the work process. At the same time, in an emergency, it is difficult to carry out timely and effective rescue. Utility Model Content

[0004] The utility model aims to provide a pump suction type handheld detector, which can obtain the position signal of the handheld gas detector in real time.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pump-suction type handheld detector, the pump-suction type handheld detector comprising:

[0006] A power supply module, used for providing a working voltage for the pump-suction type handheld detector;

[0007] The detection module comprises a detection unit, wherein the detection unit comprises a plurality of first detection elements for detecting different harmful gases and a second detection element for detecting oxygen concentration, which are integrated;

[0008] A microcontroller module is electrically connected to the detection module, and is configured to obtain and process a detection signal from the detection module;

[0009] A communication module, electrically connected to the micro-control module, obtains the detection signal processed by the micro-control module and transmits it to a remote control center;

[0010] The positioning module is electrically connected to the communication module, processes the GPS signal received from the satellite into a position signal and sends it to the remote control center through the communication module.

[0011] Furthermore, the positioning module includes a GPS receiving unit for receiving the GPS signal and a data processing unit for processing the GPS signal.

[0012] Furthermore, the communication module includes a 4G-LTE module circuit and a serial port communication circuit which are electrically connected to the micro control module respectively.

[0013] Furthermore, the first detection element includes three general electrochemical sensor circuits, a catalytic sensor circuit and an infrared sensor circuit.

[0014] Furthermore, the second detection component is an oxygen electrochemical sensor circuit.

[0015] Furthermore, the detection module also includes a conditioning unit, which includes an amplifying circuit for amplifying the detection signal, a filtering circuit for eliminating interference signals in the detection signal, and a linearizing circuit for converting the detection signal.

[0016] Furthermore, the pump-suction handheld detector also includes a human-computer interaction module, which includes a display screen and an infrared connector circuit electrically connected to the microcontrol module. The infrared connector circuit receives a remote control signal from an infrared remote controller and transmits it to the microcontrol module. The microcontrol module processes the remote control signal and sends it to the display screen.

[0017] Furthermore, the detection module also includes a gas collection unit, and the gas collection unit includes a gas collection pump, a filter connected to the gas collection pump, and a gas sample chamber connected to the filter.

[0018] The beneficial effects of the present utility model are as follows: the present application detects the concentration of harmful gases and oxygen through the detection module, the microcontroller module and the communication module to realize the detection of harmful gases in a confined space, while ensuring the safety of the working environment of the operators, and uses the positioning module to obtain the position signal of the handheld detector in real time, so as to realize the real-time grasp of the position status of the operators, facilitate their operation guidance, and can quickly and effectively implement rescue operations in emergency situations.

[0019] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of a pump-type handheld detector according to an embodiment of the present application. DETAILED DESCRIPTION

[0021] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0022] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Please refer to Figure 1 The pump-suction handheld detector shown in an embodiment of the present application also includes a power module 1, a detection module 3, a microcontroller module 2, a communication module 4, a positioning module 5 and a human-computer interaction module 6.

[0025] The power module 1 is used to provide working voltage for the pump suction handheld detector. The power module 1 is a mobile power supply, and a lithium battery or polymer battery equipped with an EUP3458VIR1 power chip is selected. EUP3458VIR1 is a DC / DC power conversion chip, which converts the input 24V DC voltage into a 5V DC voltage output through internal switch tubes and magnetic components. In addition, the power module 1 also includes a feedback circuit, a voltage stabilization circuit and a protection circuit, wherein the feedback circuit is used to feed back the sampling signal of the output voltage to the input end of the power chip, and stabilize the output voltage by adjusting the duty cycle of the switch tube; the voltage stabilization circuit monitors the output voltage in real time through the feedback circuit, and adjusts the duty cycle of the switch tube according to the change of the output voltage to maintain the stability of the output voltage. When abnormal conditions such as overcurrent and overvoltage occur, the protection circuit is activated to cut off the switch tube or reduce the input voltage to protect the safety of the power chip and the entire circuit. The protection circuit is used to prevent abnormal conditions such as overcurrent and overvoltage from damaging the power chip and the entire circuit. It is a prior art and will not be described here.

[0026] The detection module 3 includes a detection unit 32, which includes a plurality of integrated first detection components for detecting different harmful gases and a second detection component for detecting oxygen concentration. The detection module 3 also includes a gas collection unit 31, which includes a gas collection pump, a filter connected to the gas collection pump, and a gas sample chamber connected to the filter, and the first detection component and the second detection component are arranged in the gas sample chamber. The gas collection pump uses a miniature explosion-proof air pump as a pumping device. The miniature explosion-proof air pump can avoid the influence of pump oil on the detection results. At the same time, the pump body is optimized to ensure a small size while providing a large flow rate and maintaining relatively low power consumption, thereby ensuring the accuracy and reliability of gas detection.

[0027] In this embodiment, the first detection component includes three general electrochemical sensor circuits, a catalytic sensor circuit and an infrared sensor circuit. The second detection component is an oxygen electrochemical sensor circuit. By integrating the general electrochemical sensor circuit, the catalytic sensor circuit and the infrared sensor circuit, it is convenient to detect different types of gases. At the same time, the sensors can be replaced with the same type as needed to meet the detection requirements of different environments.

[0028] At the same time, in order to convert the original signal detected by the sensor into a signal suitable for subsequent processing, the detection module 3 also includes a conditioning unit 33, which includes an amplifier circuit for amplifying the detection signal, a filter circuit for eliminating interference signals in the detection signal, and a linearization circuit for converting the detection signal. In addition, the detection module 3 includes a data acquisition unit, and the detection signal conditioned by the conditioning unit 33 is input to the data acquisition unit, which performs analog-to-digital conversion and further processes and packages to form a detection signal data packet, which is sent to the microcontroller module 2 through the serial communication interface for subsequent processing. It is a prior art and will not be described in detail here.

[0029] The microcontrol module 2 is electrically connected to the detection module 3 to obtain the detection signal of the detection module 3 and process it. The control module adopts a high-performance 32-bit microcontroller GD32F303RCT6 (hereinafter referred to as the "microcontroller"), which has high processing power and stability and is suitable for various complex calculations and processing tasks. The microcontroller receives the real-time detection signal data packet transmitted by the detection module 3 and processes the detection signal data packet.

[0030] The data processing flow is as follows: parse the received data packets, extract useful monitoring data, perform statistical analysis on the parsed data, determine the gas concentration state of the current monitoring environment, store the analyzed data in the internal memory for subsequent processing and query, and at the same time, communicate with the human-computer interaction module 6 through the SPI protocol to display the gas concentration data processed by the algorithm. And according to the data analysis results, determine whether the gas concentration exceeds the preset alarm threshold, and give an alarm prompt in time. There are two main alarm forms. First, when the concentration exceeds the preset value, the communication module 4 is controlled by the AT command to upload the data to the remote control center to remind the remote monitoring personnel. Second, according to the judgment result, the sound and light alarm or peripherals such as the fan are driven to work to prompt the operating personnel or perform emergency treatment. It is a prior art and will not be repeated here.

[0031] The communication module 4 is electrically connected to the microcontroller module 2, and obtains the detection signal processed by the microcontroller module 2 and transmits it to the remote control center. The communication module 4 includes a 4G-LTE module circuit and a serial communication circuit, which are electrically connected to the microcontroller module 2 respectively. Among them, the 4G-LTE module circuit uses the 4G-LTE module of Quectel Communications model RC800E-CN, which is composed of a module, an antenna, a SIM card holder and other parts. The module integrates functional units such as a baseband processing unit, a radio frequency processing unit and a data transmission interface, and supports TCP / IP protocol stack and multiple data transmission protocols. Through serial communication with the microcontroller processor, the 4G-LTE module can realize remote data transmission and alarm information upload.

[0032] The working process is as follows: Initialization: During the startup phase, the 4G-LTE module performs initialization operations, including checking the network status, registering the network, etc.; Data transmission: When the detector detects that the gas concentration exceeds the preset threshold, the microcontroller sends an AT command to the 4G-LTE module through the serial port, triggering the upload operation of the alarm information and data packet; Data packaging: The 4G-LTE module packages the alarm information and detection signal data packets to form a data packet format that complies with the protocol; Data transmission: Through the 4G network, the 4G-LTE module sends the packaged detection signal data packet to the remote control center; Status feedback: During the data transmission process, the 4G-LTE module will feedback the network status information in real time so that the microcontroller can perform corresponding processing.

[0033] The serial communication circuit uses the RS485 / RS232 standard as the communication interface. The RS485 / RS232 communication circuit is mainly composed of a level conversion chip, a balanced driver and a receiver. When the pump suction handheld detector needs to send data to an external device, the microcontroller sends the detection signal data packet to the level conversion chip through the TTL signal line. The level conversion chip converts it into an RS485 / RS232 standard level signal, and then drives the signal line through the balanced driver to send it to the external device. At the same time, the data information sent by the external device can also be transmitted to the receiver through the signal line, and is converted into a TTL signal by the level conversion chip and sent to the microcontroller for processing. This is a prior art and will not be described in detail here.

[0034] The positioning module 5 is electrically connected to the communication module 4, processes the GPS signal received from the satellite into a position signal and sends it to the remote control center through the communication module 4. The positioning module 5 includes a GPS receiving unit for receiving GPS signals and a data processing unit for processing GPS signals.

[0035] The workflow of the positioning module 5 is as follows: Startup and initialization: After the system is turned on, each module is initialized to ensure normal working status; GPS signal reception: The GPS receiving unit starts to receive the GPS signal from the satellite, performs preliminary processing, and sends it to the data processing unit. Data processing: The data processing unit receives the GPS signal preliminarily processed from the GPS receiving unit, and obtains an accurate position signal through calculation and conversion; Data communication: The processed position signal is transmitted to the remote control center or command center through the 4G-LTE module, and at the same time, it is sent to the human-computer interaction module 6 through the serial communication interface to display the position information in real time and allow the user to perform operation settings; Monitoring and alarm: The management personnel of the remote control center or command center can monitor the position information of the operating personnel in real time, and trigger the alarm mechanism (one-key SOS) when an abnormal situation occurs.

[0036] The pump suction handheld detector also includes a human-computer interaction module 6, which includes a display screen and an infrared connector circuit electrically connected to the microcontroller module 2. The infrared connector circuit receives the remote control signal of the infrared remote controller and transmits it to the microcontroller module 2. The microcontroller module 2 processes the remote control signal and sends it to the display screen. Among them, the display screen uses an OLED display screen, which has the characteristics of self-luminescence, can provide better contrast and color performance, and has low power consumption, which is suitable for portable devices. The infrared connector circuit uses an infrared connector with model LF0038GKLL-1 to realize the function of human-computer interaction through an infrared remote controller. It is a prior art and will not be described in detail here.

[0037] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A pump suction handheld detector, characterized in that: The pump suction type handheld detector comprises: A power supply module, used for providing a working voltage for the pump-suction type handheld detector; The detection module comprises a detection unit, wherein the detection unit comprises a plurality of first detection elements for detecting different harmful gases and a second detection element for detecting oxygen concentration, which are integrated; A microcontroller module is electrically connected to the detection module, and is configured to obtain and process a detection signal from the detection module; A communication module, electrically connected to the micro-control module, obtains the detection signal processed by the micro-control module and transmits it to a remote control center; The positioning module is electrically connected to the communication module, processes the GPS signal received from the satellite into a position signal and sends it to the remote control center through the communication module.

2. The pump-suction handheld detector according to claim 1, characterized in that: The positioning module includes a GPS receiving unit for receiving the GPS signal and a data processing unit for processing the GPS signal.

3. The pump-suction handheld detector according to claim 1, characterized in that: The communication module includes a 4G-LTE module circuit and a serial port communication circuit which are electrically connected to the micro control module respectively.

4. The pump-suction handheld detector according to claim 1, characterized in that: The first detection component includes three general electrochemical sensor circuits, a catalytic sensor circuit and an infrared sensor circuit.

5. The pump-suction handheld detector as claimed in claim 4, characterized in that: The second detection component is an oxygen electrochemical sensor circuit.

6. The pump-suction handheld detector according to claim 5, characterized in that: The detection module further includes a conditioning unit, which includes an amplifying circuit for amplifying the detection signal, a filtering circuit for eliminating interference signals in the detection signal, and a linearizing circuit for converting the detection signal.

7. The pump-suction handheld detector according to claim 1, characterized in that: The pump-suction handheld detector also includes a human-computer interaction module, which includes a display screen and an infrared connector circuit electrically connected to the microcontroller module. The infrared connector circuit receives the remote control signal of the infrared remote controller and transmits it to the microcontroller module. The microcontroller module processes the remote control signal and sends it to the display screen.

8. The pump-suction handheld detector according to claim 1, characterized in that: The detection module further comprises a gas collection unit, which comprises a gas collection pump, a filter connected to the gas collection pump, and a gas sample chamber connected to the filter.

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