Calibrating device of portable alcohol detector

Abstract

The utility model relates to the related technical field of alcohol electrochemical sensors, in particular to a calibration device of a portable alcohol detector, which comprises an upper shell and a lower box body, and a calibration device placing groove is arranged in a foam pad. According to the proofreading device of the portable alcohol detector, through the arrangement of the proofreading device, the proofreading tank body can stably store standard gas, and through the design of the charging connector inlet and the spring, gas supplementation is facilitated, the safety of gas storage is ensured, a stable gas source is provided for follow-up proofreading work, and the proofreading device is convenient to use. A pilot-operated pressure reducing valve in the pressure reducing mechanism and components on the pressure reducing valve work cooperatively, the pressure of output gas can be accurately regulated and controlled according to the calibration requirements of different alcohol detectors, the stability and accuracy of gas pressure conditions in the calibration process are guaranteed, the whole calibration device is tightly matched with a pressure sensor and an electrochemical alcohol sensor, and the calibration accuracy is improved. And key data is provided for the control circuit, so that the detection parameters of the alcohol detector are effectively calibrated.

Description

Technical Field

[0001] This utility model relates to the technical field of alcohol electrochemical sensors, and in particular to a calibration device for a portable alcohol detector. Background Technology

[0002] The core principle of an electrochemical alcohol sensor is based on an electrochemical reaction. When ethanol molecules in the air enter the electrolyte inside the sensor, they are oxidized at the anode, releasing electrons and generating a current. The magnitude of this current is proportional to the concentration of ethanol, so the concentration of ethanol can be determined by measuring the current. The specific working principle of the electrochemical alcohol sensor is as follows: The sensor mainly consists of a small battery filled with electrolyte. The battery has two electrodes, namely the anode and the cathode. When ethanol molecules in the air enter the battery, they are oxidized at the anode, releasing electrons and generating a current. The magnitude of this current is proportional to the concentration of ethanol, so the concentration of ethanol can be determined by measuring the current. In addition, the electrochemical sensor can also be used for breath alcohol detection. A catalyst oxidizes the alcohol in the breath into water and carbon dioxide, and the released chemical energy is converted into an electric current by an energy converter. The magnitude of the current is proportional to the concentration of ethanol. The electrochemical alcohol sensor is also used in breath alcohol detectors to help detect whether drivers are driving under the influence of alcohol, ensuring traffic safety. This sensor has the advantages of simple operation, high sensitivity, and suitability for on-site use, especially suitable for rapid detection scenarios.

[0003] However, existing electrochemical sensor alcohol meters require calibration every 6 or 12 months due to wear and tear during use. When the alcohol meter expires, it needs to be sent to the local metrology center or a qualified third-party calibration agency for calibration, which is very inconvenient and delays the testing time. Similarly, most civilian alcohol meters are not calibrated after the calibration period, resulting in decreased accuracy and frequent disputes during testing. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a calibration device for a portable alcohol detector, which is reusable and easy to carry, thus solving the inconvenience of calibration in existing electrochemical sensor alcohol detectors.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A calibration device for a portable alcohol detector includes an upper housing, characterized in that a lower housing is mounted on the bottom of the upper housing, a display screen is connected to the surface of the upper housing, a keypad is provided on the surface of the upper housing, a calibration device is disposed above the upper housing, a pressure sensor is installed inside the upper housing, an electrochemical alcohol sensor is also installed inside the upper housing, a gas pump is installed inside the upper housing, and a battery is installed inside the lower housing. The calibration device includes a gas inlet mechanism and a pressure reduction mechanism, wherein the pressure reduction mechanism reduces the pressure of the gas entering through the gas inlet mechanism.

[0009] Preferably, the gas inlet mechanism includes a calibration tank, an inflation nozzle inlet, and a spring. The calibration tank is installed on the top of the upper housing. An inflation nozzle inlet is provided on the surface of the calibration tank. A spring is provided at the inflation nozzle inlet. A pressure reduction mechanism is provided at the bottom of the calibration tank.

[0010] Preferably, the pressure reducing mechanism includes a pressure reducing valve, a button on the pressure reducing valve, an air outlet channel on the pressure reducing valve, an upper component of the pressure reducing valve, and an air outlet pipe for the tank. The pressure reducing valve is installed at the bottom of the calibration tank. A button on the pressure reducing valve is connected to one side of the pressure reducing valve. An air outlet channel for the pressure reducing valve is opened on one side of the pressure reducing valve. An upper component of the pressure reducing valve is provided inside the pressure reducing valve. An air outlet pipe for the tank is installed at the bottom of the pressure reducing valve.

[0011] Preferably, the pressure reducing valve is a pilot-operated pressure reducing valve, and the components of the pressure reducing valve include a pilot valve, a main valve, and a spring assembly.

[0012] Preferably, a lower housing is provided on the outer side of the upper and lower housings, and an upper housing is rotatably connected to the upper housing. A latch is installed between the lower housing and the upper housing. A handle is installed on the upper surface of the upper housing. An anti-collision pad is installed on the inner side of the upper housing. A foam pad is installed inside the lower housing. An alcohol meter placement slot is opened inside the foam pad. Other component placement slots are also opened inside the foam pad.

[0013] Preferably, the latches are provided in two identical sets between the lower and upper boxes, and are symmetrically distributed along the central axis of the lower and upper boxes.

[0014] Preferably, the anti-collision pads are provided in three identical sets inside the upper housing, and the shapes of the alcohol meter placement slot and other component placement slots are precisely matched with the shape of the device and each component.

[0015] Compared with existing technologies, the beneficial effects of this utility model are as follows: This portable alcohol detector calibration device provides core support for the accurate calibration of the alcohol detector, greatly improving the reliability of alcohol test results. The gas inlet mechanism in the calibration device allows the calibration tank to stably store standard gas. The design of the inlet and spring of the filling nozzle facilitates gas replenishment while ensuring the safety of gas storage, providing a stable gas source for subsequent calibration work. The pilot-operated pressure reducing valve in the pressure reducing mechanism works in conjunction with the components on the pressure reducing valve to accurately adjust the calibration according to the different calibration requirements of different alcohol detectors. By regulating the output gas pressure, the stability and accuracy of gas pressure conditions during the calibration process are ensured. The entire calibration device works closely with the pressure sensor and the electrochemical alcohol sensor. By accurately monitoring the standard gas pressure and alcohol concentration, it provides key data for the control circuit, thereby effectively calibrating the detection parameters of the alcohol detector. This allows the alcohol detector to provide more accurate detection results when put into use. At the same time, the calibration device and the alcohol detector adopt a detachable structure, allowing users to calibrate the alcohol detector anytime and anywhere, solving the inconvenience of calibration in existing alcohol detectors with electrochemical sensors. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the appearance and structure of this utility model;

[0017] Figure 2 This is a side view and cross-sectional structural diagram of the present utility model;

[0018] Figure 3 This is a schematic diagram of the calibration device of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the upper and lower boxes of this utility model.

[0020] Figure 5 This is a schematic diagram of the structure of the anti-collision pad and the foam pad of this utility model.

[0021] In the diagram: 1. Upper housing; 2. Lower housing; 3. Display screen; 4. Button panel; 5. Calibration device; 501. Calibration tank; 502. Gas inlet; 503. Spring; 504. Pressure reducing valve; 505. Button on pressure reducing valve; 506. Gas outlet channel on pressure reducing valve; 507. Components on pressure reducing valve; 508. Gas outlet pipe of tank; 6. Pressure sensor; 7. Electrochemical alcohol sensor; 8. Gas pump; 9. Battery; 10. Lower housing; 11. Upper housing; 12. Lock; 13. Handle; 14. Anti-collision pad; 15. Foam pad; 16. Alcohol analyzer placement slot; 17. Other component placement slot. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-4 This utility model provides a technical solution: a calibration device for a portable alcohol detector, comprising an upper housing 1, characterized in that a lower housing 2 is installed at the bottom of the upper housing 1, a display screen 3 is connected to the surface of the upper housing 1, a keypad 4 is provided on the surface of the upper housing 1, a calibration device 5 is provided above the upper housing 1, a pressure sensor 6 is installed inside the upper housing 1, an electrochemical alcohol sensor 7 is also installed inside the upper housing 1, an air pump 8 is installed inside the upper housing 1, a battery 9 is installed inside the lower housing 2, and the calibration device 5 includes a gas inlet mechanism and a pressure reduction mechanism.

[0024] In this embodiment, the gas entry mechanism includes a calibration tank 501, an inflation nozzle inlet 502, and a spring 503. The calibration tank 501 is mounted on the top of the upper housing 1. The inflation nozzle inlet 502 is provided on the surface of the calibration tank 501, and a spring 503 is provided at the inflation nozzle inlet 502. A pressure reducing mechanism is provided at the bottom of the calibration tank 501. The gas entry mechanism greatly improves the convenience and safety of the calibration device in obtaining standard gas. When it is necessary to replenish the calibration device with standard gas, the operator only needs to insert the inflation nozzle of the inflation device into the inflation nozzle inlet 502. During the insertion process, the inflation nozzle overcomes the elastic force of the spring 503, causing the inflation nozzle inlet 502 to open, and the standard gas can smoothly enter the calibration tank 501. Within the calibration tank 501, spring 503 plays a crucial role. On one hand, during inflation, it provides resistance to ensure a tight connection between the inflation nozzle and the inlet 502, preventing gas leakage and ensuring the stability and safety of the inflation process. On the other hand, when inflation is complete and the inflation nozzle is removed, spring 503 quickly returns to its original state, pushing the sealing component at the inlet to close, effectively preventing the standard gas in the calibration tank 501 from leaking back. The calibration tank 501 provides a stable storage space for the standard gas. Its robust material and excellent sealing performance ensure stable internal gas pressure, providing a reliable gas source for subsequent alcohol detector calibration work, ensuring that the entire calibration process can be carried out accurately and efficiently.

[0025] Furthermore, the pressure-reducing mechanism includes a pressure-reducing valve 504, a button 505 on the pressure-reducing valve, an outlet port 506 on the pressure-reducing valve, an upper component 507 on the pressure-reducing valve, and an outlet pipe 508 for the tank. A pressure-reducing valve 504 is installed at the bottom of the calibration tank 501. The button 505 is connected to one side of the pressure-reducing valve 504, and an outlet port 506 is provided on one side of the pressure-reducing valve 504. The upper component 507 is located inside the pressure-reducing valve 504, and the outlet pipe 508 is installed at the bottom of the pressure-reducing valve 504. Through the design of this pressure-reducing mechanism, precise control of the standard gas pressure inside the calibration tank 501 is achieved, providing stable and suitable pressure conditions for the calibration of the alcohol detector. When calibration is required, the operator presses the button 505 on the pressure-reducing valve. This action, through a mechanical linkage, acts on the upper component 507 inside the pressure-reducing valve 504. The upper component 507 contains a series of precision valve assemblies and spring structures. Under the external force of pressing the button, the valve assemblies open... Upon activation, the high-pressure standard gas in the calibration tank 501 begins to flow into the pressure reducing valve 504. Within the pressure reducing valve 504, the gas undergoes multi-stage pressure reduction. First, the main valve throttles the gas, initially lowering the pressure. Then, the spring structure buffers and fine-tunes the pressure, further stabilizing it within the set range. The stabilized gas then flows through the pressure reducing valve outlet 506 into the tank outlet pipe 508, ultimately being delivered to the testing area. Throughout this process, the pressure reducing valve 504 precisely adjusts the output gas pressure according to the calibration requirements of different alcohol detectors, ensuring pressure stability and accuracy. For example, for some professional alcohol detectors with high pressure accuracy requirements, the pressure reducing mechanism can control pressure fluctuations within a very small range, ensuring the reliability of the calibration results. Furthermore, this adjustable pressure reducing design allows the calibration device to adapt to various models of alcohol detectors with different pressure requirements, greatly improving the device's versatility and applicability, and providing strong support for the accurate calibration of various alcohol detectors.

[0026] Furthermore, the pressure reducing valve 504 is a pilot-operated pressure reducing valve. The upper component 507 of the pressure reducing valve includes a pilot valve, a main valve, and a spring assembly. The configuration of the pressure reducing valve 504 and the upper component 507 provides a strong guarantee for the accurate and reliable operation of the calibration device. With its unique structure, the pilot-operated pressure reducing valve 504, in which the pilot valve, main valve, and spring assembly in the upper component 507 work together, can achieve high-precision regulation of gas pressure. When the alcohol detector needs to be calibrated, the opening of the pilot valve can be precisely controlled by operating the button 505 on the pressure reducing valve, thereby finely regulating the outlet pressure of the main valve. This ensures that the gas pressure output from the outlet port 506 of the pressure reducing valve is stable within the accurate range suitable for the calibration of the alcohol detector, ensuring the stability and accuracy of the gas pressure during the calibration process and providing reliable pressure conditions for subsequent testing.

[0027] In addition, a lower housing 10 is provided on the outer side of the upper housing 1 and the lower housing 2. An upper housing 11 is rotatably connected to the upper housing 10. A latch 12 is installed between the lower housing 10 and the upper housing 11. A handle 13 is installed on the upper surface of the upper housing 11. A shock-absorbing pad 14 is installed on the inner side of the upper housing 11. A foam pad 15 is installed inside the lower housing 10. An alcohol meter placement slot 16 is opened inside the foam pad 15. Other component placement slots 17 are also opened inside the foam pad 15. The lower housing 10 and the upper housing 11 significantly enhance the portability and protection of the calibration device. When it is necessary to carry the device for work, the main body of the calibration device and related accessories can be placed in the alcohol meter placement slot 16 and other component placement slots 17 in the foam pad 15. These grooves, which are precisely matched to the shape of the device, can effectively fix the components and prevent damage caused by shaking or collision during transportation. Then, the upper housing 11 is closed. Symmetrically distributed latches 12 securely lock the upper housing 11 and lower housing 10 together, ensuring that the housings will not open accidentally during transport. The handle 13 is ergonomically designed, and its non-slip rubber sleeve not only fits the hand's grip habits but also effectively prevents the device from slipping and falling during transport. Whether transporting over long distances or moving short distances, users can easily hold the device, greatly improving its portability. The anti-collision pad 14 on the inside of the upper housing 11 and the foam pad 15 inside the lower housing 10 work together to form a comprehensive cushioning protection system. In the event of an accidental collision, the anti-collision pad 14 can absorb some of the impact force first, reducing the direct impact on the device inside the upper housing 11. The foam pad 15 further cushions vibrations from all directions, providing comprehensive protection for the calibration device and its accessories, ensuring that the device is always in good working condition and ready for use at any time. This meets users' needs for safe transportation and convenient carrying of the device in different scenarios.

[0028] In addition, there are two identical sets of latches 12 between the lower case 10 and the upper case 11, and they are symmetrically distributed along the central axis of the lower case 10 and the upper case 11. Through the setting of the latches 12, the two sets of symmetrically distributed latches 12 can apply locking force evenly, so that the upper case 10 and the lower case 11 are tightly closed, effectively preventing the case from being accidentally opened during carrying, protecting the internal devices and components from damage, and also ensuring the overall stability and safety of the device.

[0029] It is worth noting that three identical sets of anti-collision pads 14 are provided inside the upper housing 11. The shapes of the alcohol meter placement slot 16 and other component placement slots 17 are precisely matched with the shape of the device and its components. Through the setting of anti-collision pads 14, alcohol meter placement slots 16 and other component placement slots 17, the three sets of anti-collision pads 14 can effectively buffer the impact force when the device is subjected to external collisions, protecting the device and components inside the upper housing 11. The precisely matched calibration device placement slots 16 and other component placement slots 17 can firmly fix the device and its components in the slots, preventing damage caused by shaking or collisions during transportation, and ensuring the safety and integrity of the device during carrying and transportation.

[0030] In use: First, ensure that there is sufficient standard gas in the calibration tank 501. If the gas is insufficient, insert the inflation nozzle into the inflation inlet 502 using the inflation device. Overcome the spring force of the spring 503 to open the inlet, allowing the standard gas to enter the calibration tank 501 for storage. When in use, turn on the device. Battery 9 powers the pressure sensor 6, electrochemical alcohol sensor 7, gas pump 8, and related control circuits. The user inputs the calibration command via the button panel 4. Upon receiving the command, the control circuit starts the gas pump 8. Simultaneously, the operator presses button 505 on the pressure reducing valve, which mechanically opens the pressure reducing valve 50. The pilot valve in compartment 4 opens, allowing high-pressure standard gas from the calibration tank 501 to flow into the pressure reducing valve 504. The gas undergoes initial pressure reduction via throttling by the main valve, followed by fine-tuning by the spring assembly to stabilize the gas pressure within the precise range suitable for the alcohol detector calibration. The gas then enters the tank outlet pipe 508 from the pressure reducing valve outlet port 506. The air pump 8 extracts the standard gas from the outlet pipe 508 and delivers it to the detection area. The pressure sensor 6 monitors the gas pressure entering the detection area in real time, converting the pressure signal into an electrical signal and transmitting it to the control circuit. If the pressure is abnormal, the control circuit adjusts the pressure reducing valve 504. Maintaining stable pressure during operation, the electrochemical alcohol sensor 7 rapidly and accurately detects the alcohol concentration in the standard gas entering the detection area, transmitting the detection data to the control circuit. The control circuit, combining the pressure data from the pressure sensor 6 and a preset calibration algorithm, precisely adjusts the detection parameters of the alcohol detector. The adjustment results are presented to the user on the display screen 3, allowing the user to intuitively understand the calibration progress and final result. When carrying the device out, the main body of the calibration device and related accessories are placed in the alcohol detector placement slot 16 and other component placement slot 17 within the foam pad 15, respectively, utilizing the... The components are fixed in grooves that precisely match the shape. The upper box 11 is closed, and two sets of symmetrically distributed latches 12 tightly lock the upper box 11 and the lower box 10 to prevent the box from being opened accidentally. The three sets of anti-collision pads 14 on the inside of the upper box 11 and the foam pads 15 inside the lower box 10 work together to buffer the impact when the device is hit or vibrated, providing all-round protection for the calibration device and its accessories. This ensures that the device is always in good working condition during transportation and meets the calibration needs of the alcohol detector in different scenarios. This completes the use of a calibration device for a portable alcohol detector.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A calibration device for a portable alcohol tester comprising an upper housing (1), characterized in that, The bottom of the upper shell (1) is provided with a lower shell (2), the surface of the upper shell (1) is connected with a display screen (3), the surface of the upper shell (1) is provided with a key panel (4), the upper side of the upper shell (1) is provided with a proofreading device (5), the inside of the upper shell (1) is provided with a pressure sensor (6), the inside of the upper shell (1) is also provided with an electrochemical alcohol sensor (7), the inside of the upper shell (1) is provided with a gas pump (8), and the inside of the lower shell (2) is provided with a battery (9). The proofreading device (5) comprises a gas inlet mechanism and a pressure reducing mechanism.

2. The calibration device for a portable alcohol tester according to claim 1, characterized in that: The gas inlet mechanism comprises a proofreading tank body (501), an inflation nozzle inlet (502) and a spring (503), the upper side of the upper shell (1) is provided with the proofreading tank body (501), the surface of the proofreading tank body (501) is provided with the inflation nozzle inlet (502), the inflation nozzle inlet (502) is provided with the spring (503), and the bottom of the proofreading tank body (501) is provided with the pressure reducing mechanism.

3. A calibration device for a portable alcohol breath tester according to claim 2, wherein: The pressure reducing mechanism comprises a pressure reducing valve (504), a pressure reducing valve upper button (505), a pressure reducing valve upper air outlet channel (506), a pressure reducing valve upper part (507) and a tank body air outlet pipeline (508), the bottom of the proofreading tank body (501) is provided with the pressure reducing valve (504), one side of the pressure reducing valve (504) is connected with the pressure reducing valve upper button (505), one side of the pressure reducing valve (504) is provided with the pressure reducing valve air outlet channel (506), the inside of the pressure reducing valve (504) is provided with the pressure reducing valve upper part (507), and the bottom of the pressure reducing valve (504) is provided with the tank body air outlet pipeline (508).

4. The calibration device for a portable alcohol meter according to claim 3, wherein: The pressure reducing valve (504) is a pilot pressure reducing valve, and the pressure reducing valve upper part (507) comprises a pilot valve, a main valve and a spring assembly.

5. The calibration device for a portable alcohol meter according to claim 1, wherein: The outside of the upper shell (1) and the lower shell (2) is provided with a lower box body (10), the upper side of the lower box body (10) is rotatably connected with an upper box body (11), a lock catch (12) is arranged between the lower box body (10) and the upper box body (11), a handle (13) is arranged on the upper surface of the upper box body (11), an anti-collision pad (14) is arranged on the inside of the upper box body (11), a foam pad (15) is arranged in the inside of the lower box body (10), an alcohol instrument placing groove (16) is arranged in the inside of the foam pad (15), and another component placing groove (17) is also arranged in the inside of the foam pad (15).

6. A calibration device for a portable alcohol breath tester according to claim 5, wherein: The lock catch (12) is arranged in two groups on the lower box body (10) and the upper box body (11) and is symmetrically distributed along the central axes of the lower box body (10) and the upper box body (11).

7. The calibration device of claim 5, wherein: The anti-collision pad (14) is arranged in three groups in the inside of the upper box body (11), and the shapes of the alcohol instrument placing groove (16) and the other component placing groove (17) are accurately matched with the shapes of the devices and components.

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