Alcohol detection hand-held

Abstract

The utility model discloses a kind of alcohol detection handheld instrument, involve alcohol detection technical field.Alcohol detection handheld instrument includes: shell, shell is provided with opening, to supply external gas to enter alcohol detection handheld instrument inside;Battery, battery is set in shell inside;Control device, control device is set in shell inside, control device is electrically connected with battery;Alcohol detection device, the detection end of alcohol detection device is correspondingly set in shell inside with opening, the power end of alcohol detection device is electrically connected with battery, the output end of alcohol detection device is electrically connected with control device;Alcohol detection device, for output alcohol detection signal;Photovoltaic module, photovoltaic module is laid in the first plane of shell along horizontal direction, the output end of photovoltaic module is electrically connected with battery through the opening of shell;Photovoltaic module, for receiving external light energy and charging battery.The utility model aims at improving the flexibility of alcohol detection handheld instrument use.

Description

Technical Field

[0001] This utility model relates to the field of alcohol detection technology, and in particular to a handheld alcohol detection device. Background Technology

[0002] Current handheld breathalyzers primarily rely on battery power to ensure portability and flexibility. Common power sources include disposable and rechargeable batteries. Some handheld breathalyzers use ordinary disposable batteries, which are readily available and easy to replace, suitable for rapid deployment and use in the absence of an external power source. However, using disposable batteries can increase long-term operating costs and is environmentally unfriendly. With technological advancements, more and more handheld breathalyzers are equipped with built-in rechargeable lithium batteries. These batteries typically have high energy density, providing extended battery life. However, this also means that these handheld breathalyzers require external charging. Without an external power source, charging is impossible. Utility Model Content

[0003] The main purpose of this invention is to provide a handheld alcohol detector, which aims to improve the flexibility of its use.

[0004] To achieve the above objectives, the present invention proposes a handheld alcohol detection device, which includes:

[0005] The outer casing has an opening to allow external gas to enter the handheld alcohol detector.

[0006] A battery, wherein the battery is disposed inside the housing;

[0007] A control device is disposed inside the housing and is electrically connected to the battery;

[0008] An alcohol detection device, wherein the detection end of the alcohol detection device is disposed inside the housing corresponding to the opening, the power supply end of the alcohol detection device is electrically connected to the battery, and the output end of the alcohol detection device is electrically connected to the control device; the alcohol detection device is used to output an alcohol detection signal;

[0009] A photovoltaic module is arranged on a first plane along the horizontal direction of the housing, and the output end of the photovoltaic module is electrically connected to the battery through an opening in the housing; the photovoltaic module is used to receive external light energy and charge the battery.

[0010] In one embodiment, the photovoltaic module includes a first photovoltaic panel and a second photovoltaic panel. The first photovoltaic panel is disposed in a first region of a first plane along a horizontal direction of the outer casing, and the second photovoltaic panel is disposed in a second region of the first plane along a horizontal direction of the outer casing. The first photovoltaic panel and the second photovoltaic panel are connected by a hinge assembly.

[0011] In one embodiment, the outer shell is provided with a storage groove along the vertical direction; the edge of the outer shell is provided with a sliding component corresponding to the vertical length of the storage groove, and the sliding component is fixedly connected to the hinge component.

[0012] In one embodiment, the handheld alcohol detector further includes a voltage conversion device. The input terminal of the voltage conversion device is electrically connected to the photovoltaic module, the controlled terminal of the voltage conversion device is electrically connected to the control device, and the output terminal of the voltage conversion device is electrically connected to the battery. The voltage conversion device is used to receive a voltage conversion control signal output by the control device, convert the first voltage output by the photovoltaic module into a second voltage, and output it.

[0013] In one embodiment, the voltage conversion device includes a voltage conversion circuit, which includes a first switching transistor, a second switching transistor, a third switching transistor, a fourth switching transistor, a first inductor, a first capacitor, and a second capacitor.

[0014] Wherein, the first terminal of the first capacitor is electrically connected to the first terminal of the output terminal of the photovoltaic module and the first terminal of the first switching transistor; the second terminal of the first capacitor is electrically connected to the second terminal of the output terminal of the photovoltaic module, the second terminal of the second switching transistor, the second terminal of the fourth switching transistor, the second terminal of the second capacitor, and the second terminal of the charging terminal of the battery; the second terminal of the first switching transistor is electrically connected to the first terminal of the second switching transistor and the first terminal of the first inductor; the first terminal of the third switching transistor is electrically connected to the first terminal of the second capacitor and the first terminal of the charging terminal of the battery; and the second terminal of the third switching transistor is electrically connected to the first terminal of the fourth switching transistor and the second terminal of the first inductor.

[0015] In one embodiment, the handheld alcohol detector further includes a voltage detection circuit, the input terminal of which is electrically connected to the output terminal of the photovoltaic module, and the output terminal of which is electrically connected to the control device; the voltage detection circuit is used to detect a first voltage output by the photovoltaic module and output a voltage detection signal.

[0016] The control device is used to receive the voltage detection signal and output a corresponding voltage conversion control signal.

[0017] In one embodiment, the voltage detection circuit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a first operational amplifier, a third capacitor, and a fourth capacitor;

[0018] Wherein, the first end of the first resistor is electrically connected to the output end of the photovoltaic module; the second end of the first resistor is electrically connected to the first end of the second resistor and the first end of the third resistor; the second end of the second resistor is grounded; the second end of the third resistor is electrically connected to the first end of the fourth capacitor and the non-inverting input end of the first operational amplifier; the second end of the fourth capacitor is grounded; the inverting input end of the first operational amplifier is electrically connected to the output end of the first operational amplifier and the first end of the fourth resistor; the second end of the fourth resistor is electrically connected to the first end of the fourth capacitor and the control device; the second end of the fourth capacitor is grounded.

[0019] In one embodiment, the handheld alcohol detector further includes a prompting device, the input terminal of which is electrically connected to the control device; the prompting device is used to receive a prompting control signal output by the control device and output a corresponding prompting signal.

[0020] This invention employs a handheld alcohol detector with photovoltaic modules, effectively improving its flexibility. The handheld alcohol detector includes a housing with an opening to allow external gas to enter. A battery is housed inside the housing and powers components within the handheld alcohol detector, such as a control device. By electrically connecting the alcohol detection device to the control device, the handheld alcohol detector detects the external gas entering through the opening and outputs an alcohol detection signal to the control device, allowing the control device to determine the alcohol content of the input gas. Furthermore, by arranging photovoltaic modules along a horizontal first plane of the housing, the battery is charged using external light energy, thereby extending the handheld alcohol detector's battery life. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the modules of the handheld alcohol detector of this utility model;

[0023] Figure 2This is a schematic diagram of a module of an embodiment of the handheld alcohol detector of this utility model;

[0024] Figure 3 This is a circuit diagram of an embodiment of the handheld alcohol detector of this utility model;

[0025] Figure 4 This is a circuit diagram of yet another embodiment of the handheld alcohol detector of this utility model;

[0026] Figure 5 This is a schematic diagram of the structure of an embodiment of the handheld alcohol detector of this utility model.

[0027] Explanation of icon numbers:

[0028] 10. Battery; 20. Control device; 30. Alcohol detection device; 40. Photovoltaic module; 41. First photovoltaic panel; 42. Second photovoltaic panel; 43. Hinge assembly; 50. Voltage conversion device; 60. Voltage detection circuit; 70. Housing; 80. Storage slot; 90. Sliding assembly; Q1-Q4, First switching transistor-Fourth switching transistor; C1-C4, First capacitor-Fourth capacitor; R1-R4, First resistor-Fourth resistor; L, First inductor.

[0029] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0030] 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.

[0031] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0032] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0033] Current handheld breathalyzers primarily rely on battery power to ensure portability and flexibility. Common power sources include disposable and rechargeable batteries. Some handheld breathalyzers use ordinary disposable batteries, which are readily available and easy to replace, suitable for rapid deployment and use in the absence of an external power source. However, using disposable batteries can increase long-term operating costs and is environmentally unfriendly. With technological advancements, more and more handheld breathalyzers are equipped with built-in rechargeable lithium batteries. These batteries typically have high energy density, providing extended battery life. However, this also means that these handheld breathalyzers require external charging. Without an external power source, charging is impossible.

[0034] Therefore, refer to Figures 1 to 5 This utility model proposes a handheld alcohol detection device, which includes:

[0035] The outer casing 70 is provided with an opening to allow external gas to enter the handheld alcohol detector;

[0036] Battery 10, wherein the battery 10 is disposed inside the housing 70;

[0037] Control device 20, which is disposed inside the housing 70 and is electrically connected to the battery 10;

[0038] An alcohol detection device 30 is provided, wherein the detection end of the alcohol detection device 30 is disposed inside the housing 70 corresponding to the opening; the power supply end of the alcohol detection device 30 is electrically connected to the battery 10; and the output end of the alcohol detection device 30 is electrically connected to the control device 20; the alcohol detection device 30 is used to output an alcohol detection signal.

[0039] A photovoltaic module 40 is arranged on a first plane of the housing 70 along the horizontal direction. The output end of the photovoltaic module 40 is electrically connected to the battery 10 through an opening in the housing 70. The photovoltaic module 40 is used to receive external light energy and charge the battery 10.

[0040] In this embodiment, the housing 70 of the handheld alcohol detector can be made of one or a combination of high-strength ABS engineering plastic, shockproof injection molded housing, or metal housing. High-strength ABS engineering plastic is robust and durable, with good impact resistance and abrasion resistance, making it suitable for use in harsh environments. ABS plastic also has good processing properties, allowing it to be manufactured into complex shapes through injection molding and other methods. Shockproof injection molded housings effectively resist external impacts, protecting internal precision components from damage. Metal housings can be made of lightweight but high-strength metals such as aluminum alloys; these housings provide excellent physical protection and good heat dissipation.

[0041] In this embodiment, battery 10 can be implemented using nickel-metal hydride (NiMH) batteries, lithium-ion batteries, lithium polymer batteries, or lithium iron phosphate (LFP) batteries. NiMH batteries offer high energy density, long cycle life, and low memory effect. They typically provide a nominal voltage of 1.2 volts and are available in various capacities. Lithium-ion batteries feature high energy density, lightweight construction, and no memory effect; their standard voltage is typically 3.7V. Lithium iron phosphate (LFP) batteries offer greater design flexibility and higher energy density. While their energy density is lower than conventional lithium-ion batteries, LFP batteries are known for their good thermal stability and safety, making them suitable for applications with high safety and cycle life requirements.

[0042] In this embodiment, the control device 20 can be implemented using a main controller, such as a DSP (Digital Signal Processor), FPGA (Field Programmable Gate Array), MCU (Microcontroller Unit), or SOC (System on Chip). The control device 20 is electrically connected to the battery 10, thereby enabling the battery 10 to supply power to the control device 20.

[0043] In this embodiment, the alcohol detection device 30 can be implemented using a semiconductor sensor or a fuel cell sensor, etc. The semiconductor sensor uses an alcohol-sensitive semiconductor material, such as tin oxide. When alcohol-containing gas comes into contact with the sensor, it causes a change in the resistance of the semiconductor material. By measuring the change in resistance, the alcohol concentration in the subject's exhaled breath can be inferred. Semiconductor sensors are advantageous due to their low cost and small size, making them ideal for personal or initial screening applications. However, their accuracy can be affected by environmental factors such as temperature and humidity. Fuel cell sensors, on the other hand, operate based on electrochemical principles, where ethanol undergoes an oxidation reaction under the action of a catalyst, generating an electric current. The intensity of the generated current is proportional to the ethanol concentration, so the alcohol content can be determined by measuring the current magnitude. Fuel cell sensors offer advantages such as high accuracy, stability, and strong anti-interference capabilities, but they are more expensive than semiconductor sensors and require regular maintenance and calibration. Taking the use of a fuel cell sensor in the alcohol detection device as an example, by setting up a corresponding current detection circuit to detect the output current of the fuel cell sensor, the control device 20 can obtain the alcohol content of the external gas detected by the alcohol detection device 30 through an analog-to-digital conversion circuit. The current detection circuit may include a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, and a second operational amplifier. The first terminal of the fifth resistor is electrically connected to the fuel cell sensor, and the second terminal of the fifth resistor is grounded. The first terminal of the sixth resistor is electrically connected to the first terminal of the fifth resistor, and the second terminal of the sixth resistor is electrically connected to the first terminal of the seventh resistor and the non-inverting input terminal of the second operational amplifier. The second terminal of the seventh resistor is grounded. The first terminal of the eighth resistor is electrically connected to the second terminal of the fifth resistor, and the second terminal of the eighth resistor is electrically connected to the first terminal of the ninth resistor and the inverting input terminal of the second operational amplifier. The second terminal of the ninth resistor is electrically connected to the output terminal of the second operational amplifier and the control device 20. When the fuel cell sensor operates, when current begins to flow through the fifth resistor, a voltage drop V1 is generated between the first terminals of the fifth and sixth resistors. The non-inverting input terminal of the second operational amplifier is connected to the second terminal of the sixth resistor, therefore it detects the voltage V1. After current begins to flow through the fifth resistor, a voltage drop V2 is generated between the second terminal of the fifth resistor and the first terminal of the eighth resistor. In this configuration, the inverting input of the second operational amplifier is connected to the second terminal of the eighth resistor, thus detecting the voltage of V2. The operational amplifier is a high-gain device, and its output voltage VOUT is set to minimize the voltage difference between the positive and negative input terminals. In this way, the operational amplifier can adjust its output to maintain a minimum voltage difference between the positive and negative input terminals.Where VOUT = R3 / R2(V1-V2), and V1-V2 = I*R1, the current in the circuit can be sampled by conversion.

[0044] In this embodiment, the photovoltaic module 40 can be fixed to the first horizontal plane of the outer casing 70, or it can be retractable, stored inside the outer casing 70 when not in use to avoid damage from external contact. The photovoltaic module 40 may include multiple photovoltaic panels, with their output terminals connected to the battery 10, to charge the battery 10 when the photovoltaic module 40 receives external light energy, effectively increasing the battery's battery life and improving the flexibility of the handheld alcohol detector. When the handheld alcohol detector lacks an external power source for charging, the photovoltaic module 40 can charge the battery 10.

[0045] This application improves the flexibility of a handheld alcohol detector by employing a photovoltaic module 40. The handheld alcohol detector includes a housing 70 with an opening to allow external gas to enter. A battery 10 is housed inside the housing 70 and powers devices within the handheld alcohol detector, such as a control device 20. The handheld alcohol detector detects external gas entering through the opening by electrically connecting the alcohol detection device 30 to the control device 20, and outputs an alcohol detection signal to the control device 20. The control device 20 then confirms the alcohol content of the input gas based on the detection signal. Furthermore, by arranging the photovoltaic module 40 along a horizontal first plane of the housing 70, the battery 10 is charged using external light energy, thereby extending the handheld alcohol detector's battery life.

[0046] refer to Figure 5 In one embodiment, the photovoltaic module 40 includes a first photovoltaic panel 41 and a second photovoltaic panel 42. The first photovoltaic panel 41 is disposed in a first region of a first plane along the horizontal direction of the outer casing 70, and the second photovoltaic panel 42 is disposed in a second region of the first plane along the horizontal direction of the outer casing 70. The first photovoltaic panel 41 and the second photovoltaic panel 42 are connected by a hinge assembly 43.

[0047] In this embodiment, the first photovoltaic panel 41 and the second photovoltaic panel 42 are connected by a hinge assembly 43, allowing the first photovoltaic panel 41 and the second photovoltaic panel 42 to be unfolded or folded when the hinge assembly 43 is pulled. It is understood that the photovoltaic assembly 40 needs to increase its light-receiving area to improve its output power. Therefore, to meet the charging requirements of the battery 10 in the handheld alcohol detector, a photovoltaic assembly 40 of a corresponding size is required. However, an excessively large photovoltaic assembly 40 would hinder the normal operation of the handheld alcohol detector. Therefore, the hinge assembly 43 connects the first photovoltaic panel 41 and the second photovoltaic panel 42 to accommodate the two different states of the handheld alcohol detector: charging via the photovoltaic assembly 40 and normal use. This also prevents damage to the photovoltaic assembly 40 due to its exposed surface on the outer casing 70.

[0048] Optionally, the outer casing 70 is provided with a storage groove 80 in the vertical direction; the edge of the outer casing 70 is provided with a sliding component 90 corresponding to the vertical length of the storage groove 80, and the sliding component 90 is fixedly connected to the hinge component 43.

[0049] In this embodiment, the shell is provided with a storage groove 80 along the vertical direction for storing the first photovoltaic panel 41 and the second photovoltaic panel 42. When the sliding component 90 is pushed upward along the vertical direction, the first photovoltaic panel 41 and the second photovoltaic panel 42 are pushed outward; when the sliding component 90 is pushed downward along the vertical direction, the first photovoltaic panel 41 and the second photovoltaic panel 42 are pushed inward. In addition, the sliding component 90 is also provided with a corresponding snap-fit ​​groove to prevent the sliding component 90 from moving arbitrarily.

[0050] refer to Figure 2 and Figure 3 In one embodiment of this utility model, the handheld alcohol detector further includes a voltage conversion device 50. The input terminal of the voltage conversion device 50 is electrically connected to the photovoltaic module 40, the controlled terminal of the voltage conversion device 50 is electrically connected to the control device 20, and the output terminal of the voltage conversion device 50 is electrically connected to the battery 10. The voltage conversion device 50 is used to receive the voltage conversion control signal output by the control device 20, convert the first voltage output by the photovoltaic module 40 into a second voltage, and output it.

[0051] In this embodiment, the voltage conversion device 50 can be implemented using a voltage conversion circuit, a voltage regulator circuit, etc. It is understood that the charging voltage of the battery 10 typically needs to be maintained within a stable voltage range, while the voltage output by the photovoltaic module 40 fluctuates due to the intensity of external light. Therefore, a corresponding voltage conversion device 50 is needed to maintain the stability of the voltage output by the photovoltaic module 40. Specifically, the voltage output by the photovoltaic module 40 may be higher than the required charging voltage of the battery 10 at certain times, or lower than the required charging voltage of the battery 10 at certain times. Therefore, when the voltage output by the photovoltaic module 40 is higher than the required charging voltage of the battery 10, a buck circuit is needed to reduce the output voltage of the photovoltaic module 40; conversely, when the voltage output by the photovoltaic module 40 is lower than the required charging voltage of the battery 10, a boost circuit is needed to boost the output voltage of the photovoltaic module 40. Thus, the voltage conversion device 50, through electrical connection with the control device 20, receives the voltage conversion control signal output by the control device 20, thereby achieving switching control between boost and buck conversion, and improving the charging flexibility of the battery 10.

[0052] Optionally, the voltage conversion device 50 includes a voltage conversion circuit, which includes a first switch Q1, a second switch Q2, a third switch Q3, a fourth switch Q4, a first inductor L, a first capacitor C1, and a second capacitor C2. The first terminal of the first capacitor C1 is electrically connected to the first terminal of the output terminal of the photovoltaic module 40 and the first terminal of the first switch Q1. The second terminal of the first capacitor C1 is electrically connected to the second terminal of the output terminal of the photovoltaic module 40, the second terminal of the second switch Q2, the second terminal of the fourth switch Q4, the second terminal of the second capacitor C2, and the second terminal of the charging terminal of the battery 10. The second terminal of the first switch Q1 is electrically connected to the first terminal of the second switch Q2 and the first terminal of the first inductor L. The first terminal of the third switch Q3 is electrically connected to the first terminal of the second capacitor C2 and the first terminal of the charging terminal of the battery 10. The second terminal of the third switch Q3 is electrically connected to the first terminal of the fourth switch Q4 and the second terminal of the first inductor L. The control device 20 outputs corresponding voltage conversion control signals to the controlled terminals of the first switch Q1, the second switch Q2, the third switch Q3, and the fourth switch Q4, thereby controlling the conduction or cutoff of the first switch Q1, the second switch Q2, the third switch Q3, and the fourth switch Q4, thus adjusting the voltage conversion circuit into a boost circuit or a buck circuit.

[0053] Optionally, the handheld alcohol detector further includes a voltage detection circuit 60, the input terminal of which is electrically connected to the output terminal of the photovoltaic module 40, and the output terminal of which is electrically connected to the control device 20; the voltage detection circuit 60 is used to detect the first voltage output by the photovoltaic module 40 and output a voltage detection signal.

[0054] The control device 20 is used to receive the voltage detection signal and output the corresponding voltage conversion control signal.

[0055] In this embodiment, the control device 20 needs to confirm the voltage amplitude output by the photovoltaic module 40, and then, based on the relationship between the voltage amplitude output by the photovoltaic module 40 and the charging voltage of the battery 10, output a corresponding voltage conversion control signal to the voltage conversion device 50, so that the voltage conversion device 50 performs boost or buck operation. Therefore, the handheld alcohol detector is also equipped with a voltage detection circuit 60 to detect the voltage amplitude output by the photovoltaic module 40 and output a corresponding voltage detection signal to the control device 20.

[0056] Optionally, refer to Figure 4The voltage detection circuit 60 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first operational amplifier, a third capacitor C3, and a fourth capacitor C4. The first terminal of the first resistor R1 is electrically connected to the output terminal of the photovoltaic module 40; the second terminal of the first resistor R1 is electrically connected to the first terminals of the second resistor R2 and the third resistor R3; the second terminal of the second resistor R2 is grounded; the second terminal of the third resistor R3 is electrically connected to the first terminal of the fourth capacitor C4 and the non-inverting input terminal of the first operational amplifier; the second terminal of the fourth capacitor C4 is grounded; the inverting input terminal of the first operational amplifier is electrically connected to the output terminal of the first operational amplifier and the first terminal of the fourth resistor R4; the second terminal of the fourth resistor R4 is electrically connected to the first terminal of the fourth capacitor C4 and the control device 20; the second terminal of the fourth capacitor C4 is grounded. The voltage signal output by the photovoltaic module 40 is divided by the first resistor R1 and then connected in parallel with the third resistor R3 to adjust the magnitude of the input signal to adapt to the input range of the operational amplifier. The adjusted input signal enters the non-inverting input of the first operational amplifier through the third resistor R3. The first operational amplifier is a non-inverting operational amplifier whose output voltage is in phase with and equal to the input voltage. Therefore, the output voltage of the op-amp is in phase with and equal to the input voltage. After passing through the second filter, the output voltage is output to the control device 20. The function of the second capacitor C2 is to filter out high-frequency noise, ensuring the accuracy of sampling by the control device 20. The fourth resistor R4 and the second capacitor C2 form an RC low-pass filter, which can further filter out high-frequency noise and improve signal quality. The fourth resistor R4 and the second capacitor C2 also form an RC time constant, which determines the cutoff frequency of the filter. The lower the cutoff frequency, the better the filtering effect, but the slower the response speed. The values ​​of the fourth resistor R4 and the second capacitor C2 can be adjusted according to actual needs to achieve the best filtering effect and response speed. The second resistor R2 and the first capacitor C1 form an RC filter to suppress power supply noise. Power supply noise may affect the performance of the op-amp, so it needs to be suppressed. The values ​​of the second resistor R2 and the first capacitor C1 can also be adjusted according to actual needs to achieve the best filtering effect and response speed.

[0057] In one embodiment of this utility model, the handheld alcohol detector further includes a prompting device, the input terminal of which is electrically connected to the control device 20; the prompting device is used to receive the prompting control signal output by the control device 20 and output a corresponding prompting signal.

[0058] In this embodiment, the prompting device can be implemented using a corresponding display prompting circuit. For example, multiple LED prompting circuits of the same color or multiple LED prompting circuits of different colors can be used to indicate different states in the handheld alcohol detection device. It is understood that the control device 20 receives the alcohol detection signal output by the alcohol detection device 30 and then outputs a corresponding prompting control signal to the prompting device, causing the prompting device to output a corresponding prompting signal. For example, when the control device 20 receives the alcohol detection signal output by the alcohol detection device 30, it determines whether the current detection object has an alcohol content exceeding a preset value based on the preset alcohol detection value, and thus outputs red and green prompting signals accordingly.

[0059] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A handheld alcohol detector, characterized in that, The handheld alcohol testing device includes: The outer casing has an opening to allow external gas to enter the handheld alcohol detector. A battery, wherein the battery is disposed inside the housing; A control device is disposed inside the housing and is electrically connected to the battery; An alcohol detection device, wherein the detection end of the alcohol detection device is disposed inside the housing corresponding to the opening, the power supply end of the alcohol detection device is electrically connected to the battery, and the output end of the alcohol detection device is electrically connected to the control device; the alcohol detection device is used to output an alcohol detection signal; A photovoltaic module is arranged on a first plane along the horizontal direction of the housing, and the output end of the photovoltaic module is electrically connected to the battery through an opening in the housing; the photovoltaic module is used to receive external light energy and charge the battery.

2. The handheld alcohol detector as described in claim 1, characterized in that, The photovoltaic module includes a first photovoltaic panel and a second photovoltaic panel. The first photovoltaic panel is disposed in a first region of a first plane along the horizontal direction of the outer casing, and the second photovoltaic panel is disposed in a second region of the first plane along the horizontal direction of the outer casing. The first photovoltaic panel and the second photovoltaic panel are connected by a hinge assembly.

3. The handheld alcohol detector as described in claim 2, characterized in that, The outer shell has a storage groove along the vertical direction; the edge of the outer shell is provided with a sliding component corresponding to the vertical length of the storage groove, and the sliding component is fixedly connected to the hinge component.

4. The handheld alcohol detector as described in claim 1, characterized in that, The handheld alcohol detector also includes a voltage conversion device. The input terminal of the voltage conversion device is electrically connected to the photovoltaic module, the controlled terminal of the voltage conversion device is electrically connected to the control device, and the output terminal of the voltage conversion device is electrically connected to the battery. The voltage conversion device is used to receive the voltage conversion control signal output by the control device, convert the first voltage output by the photovoltaic module into a second voltage, and output it.

5. The handheld alcohol detector as described in claim 4, characterized in that, The voltage conversion device includes a voltage conversion circuit, which includes a first switching transistor, a second switching transistor, a third switching transistor, a fourth switching transistor, a first inductor, a first capacitor, and a second capacitor. Wherein, the first terminal of the first capacitor is electrically connected to the first terminal of the output terminal of the photovoltaic module and the first terminal of the first switching transistor; the second terminal of the first capacitor is electrically connected to the second terminal of the output terminal of the photovoltaic module, the second terminal of the second switching transistor, the second terminal of the fourth switching transistor, the second terminal of the second capacitor, and the second terminal of the charging terminal of the battery; the second terminal of the first switching transistor is electrically connected to the first terminal of the second switching transistor and the first terminal of the first inductor; the first terminal of the third switching transistor is electrically connected to the first terminal of the second capacitor and the first terminal of the charging terminal of the battery; and the second terminal of the third switching transistor is electrically connected to the first terminal of the fourth switching transistor and the second terminal of the first inductor.

6. The handheld alcohol detector as described in claim 4, characterized in that, The handheld alcohol detector also includes a voltage detection circuit. The input terminal of the voltage detection circuit is electrically connected to the output terminal of the photovoltaic module, and the output terminal of the voltage detection circuit is electrically connected to the control device. The voltage detection circuit is used to detect the first voltage output by the photovoltaic module and output a voltage detection signal. The control device is used to receive the voltage detection signal and output a corresponding voltage conversion control signal.

7. The handheld alcohol detector as described in claim 6, characterized in that, The voltage detection circuit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a first operational amplifier, a third capacitor, and a fourth capacitor; Wherein, the first end of the first resistor is electrically connected to the output end of the photovoltaic module; the second end of the first resistor is electrically connected to the first end of the second resistor and the first end of the third resistor; the second end of the second resistor is grounded; the second end of the third resistor is electrically connected to the first end of the fourth capacitor and the non-inverting input end of the first operational amplifier; the second end of the fourth capacitor is grounded; the inverting input end of the first operational amplifier is electrically connected to the output end of the first operational amplifier and the first end of the fourth resistor; the second end of the fourth resistor is electrically connected to the first end of the fourth capacitor and the control device; the second end of the fourth capacitor is grounded.

8. The handheld alcohol detector as described in claim 1, characterized in that, The handheld alcohol tester also includes a prompting device, the input of which is electrically connected to the control device; the prompting device is used to receive the prompting control signal output by the control device and output a corresponding prompting signal.

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