Temperature-sensing optocoupler

Abstract

The temperature sensing optocoupler comprises a light emitter (3) and a light receiver (4); a temperature sensing body (2) is arranged between the light emitter (3) and the light receiver (4), so that light emitted by the light emitter (3) can irradiate the light receiver (4) only after penetrating through the temperature sensing body (2); the temperature sensing body (2) is made of plastics containing temperature sensing color-changing powder, so that when the temperature exceeds the color-changing temperature of the temperature sensing color-changing powder, the temperature sensing body (2) becomes transparent from opaque or becomes opaque from transparent. The optocoupler has a temperature detection function, can be used for detecting temperature and is used as a temperature monitoring device; according to the temperature-sensing optocoupler, digital signals can be directly input, complex digital-analog circuits are not needed to be used in cooperation, and the application cost is low.

Description

Technical Field

[0001] This application mainly pertains to the technical field of temperature sensors, and specifically relates to a temperature-sensitive optocoupler. Background Art

[0002] An optocoupler (such as a PC817 optocoupler) is a common electronic component, but usually an optocoupler does not have a temperature-sensing function.

[0003] This application aims to provide an optocoupler with a temperature-sensing function, enabling the optocoupler to be used as a temperature sensor, which can be used for temperature monitoring, with simple application and low cost. Summary of the Utility Model

[0004] To solve the above problems, this application proposes a temperature-sensitive optocoupler, which is characterized by including: a light emitter (3) and a light receiver (4);

[0005] Between the light emitter (3) and the light receiver (4), a temperature-sensitive body (2) is provided, such that the light emitted by the light emitter (3) must pass through the temperature-sensitive body (2) to irradiate on the light receiver (4);

[0006] The temperature-sensitive body (2) is made of a material containing temperature-sensitive color-changing powder, such that when the temperature exceeds the color-changing temperature of the temperature-sensitive color-changing powder, the temperature-sensitive body (2) changes from opaque to transparent or from transparent to opaque;

[0007] The light emitter (3) is provided with a light emitter pin (6); the light receiver (4) is provided with a light receiver pin (7).

[0008] Further, the temperature-sensitive optocoupler is characterized by further including:

[0009] The surface of the temperature-sensitive optocoupler body is provided with a sealing case (1); the sealing case (1) is made of an opaque insulating material.

[0010] Further, the temperature-sensitive optocoupler is characterized by further including: a heat-conducting metal block (5);

[0011] One side of the heat-conducting metal block (5) is in contact with the outside, and the other side is in contact with the temperature-sensitive body (2).

[0012] Further, the temperature-sensitive optocoupler is characterized by further including:

[0013] The light emitter (3) is a light-emitting diode (LED).

[0014] Further, the temperature-sensitive optocoupler is characterized by further including:

[0015] The optical receiver (4) is a photosensitive transistor.

[0016] Furthermore, a temperature-sensitive optocoupler is characterized by further comprising:

[0017] The temperature-sensitive body (2) is made of plastic containing thermochromic powder.

[0018] Applying the technical solution proposed in this application, compared with the prior art, there is at least one beneficial effect as follows:

[0019] 1. The temperature-sensitive optocoupler proposed in this application has the function of detecting temperature and can be used as a temperature sensor.

[0020] 2. The temperature-sensitive optocoupler proposed in this application works when the temperature is higher than its color-changing temperature and does not work when the temperature is lower than its color-changing temperature, or

[0021] it does not work when the temperature is higher than its color-changing temperature and works when the temperature is lower than its color-changing temperature.

[0022] 3. The temperature-sensitive optocoupler proposed in this application has a simple structure and low cost, and is cheaper than most existing temperature detection elements.

[0023] 4. The temperature-sensitive optocoupler proposed in this application is easy to apply, can directly output digital signals 0 / 1, does not require an analog-to-digital conversion circuit, and has a low application cost. Description of the Drawings

[0024] Figure 1 It is a schematic structural diagram of a temperature-sensitive optocoupler proposed in this application.

[0025] Among them, each reference numeral in the figure: 1 - housing; 2 - temperature-sensitive body; 3 - optical emitter; 4 - optical receiver; 5 - heat-conducting metal block; 6 - optical emitter pin; 7 - optical receiver pin. Detailed Embodiments

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] This application proposes a temperature-sensitive optocoupler, which is characterized by comprising: an optical emitter (3) and an optical receiver (4);

[0028] A temperature-sensitive body (2) is arranged between the optical emitter (3) and the optical receiver (4), so that the light emitted by the optical emitter (3) must pass through the temperature-sensitive body (2) to irradiate on the optical receiver (4).

[0029] The temperature-sensitive body (2) is made of a material containing temperature-sensitive color-changing powder, so that when the temperature exceeds the color-changing temperature of the temperature-sensitive color-changing powder, the temperature-sensitive body (2) changes from opaque to transparent or from transparent to opaque.

[0030] The light emitter (3) is provided with a light emitter pin (6); the light receiver (4) is provided with a light receiver pin (7).

[0031] The temperature-sensitive color-changing powder, also called reversible temperature-sensitive color-changing pigment, commonly known as temperature-changing pigment, temperature-sensitive powder or temperature-changing powder;

[0032] The reason why the temperature-sensitive body (2) can change color is that it contains the temperature-sensitive color-changing powder. There are many models of the temperature-sensitive color-changing powder, and a suitable temperature-sensitive color-changing powder can be selected according to the temperature value to be detected. For example, if it is necessary to detect whether the temperature exceeds 45 degrees, the 45-degree temperature-sensitive color-changing powder can be selected to make the temperature-sensitive body (2).

[0033] Usage method: According to whether the light receiver (4) is turned on, it is judged whether the temperature exceeds the color-changing temperature of the temperature-sensitive body (2), so as to achieve the purpose of temperature detection.

[0034] Further, a temperature-sensitive optocoupler is characterized in that it further includes:

[0035] The surface of the temperature-sensitive optocoupler body is provided with a sealing shell (1); the sealing shell (1) is made of an opaque insulating material;

[0036] Since the sealing shell (1) will affect heat conduction, when applied in a lightless environment, without the sealing shell (1), the temperature-sensitive body (2) can synchronize with the ambient temperature faster, thus improving the response speed. Therefore, in a lightless environment, the absence of the sealing shell (1) is beneficial to improving the response speed. However, when applied in a bright environment, the sealing shell (1) is required to isolate ambient light to prevent interference from ambient light.

[0037] Further, a temperature-sensitive optocoupler is characterized in that it further includes: a heat-conducting metal block (5);

[0038] One side of the heat-conducting metal block (5) is in contact with the outside, and the other side is in contact with the temperature-sensitive body (2); the heat-conducting metal block (5) plays a role in heat conduction, so that the temperature-sensitive body (2) can synchronize with the external ambient temperature quickly. In application, the heat-conducting metal block (5) can be welded / stuck on the object to be measured, so that the temperature-sensitive body (2) can synchronize with the temperature of the object to be measured quickly through the heat conduction of the heat-conducting metal block (5), so as to achieve the purpose of improving the response speed.

[0039] Further, a temperature-sensitive optocoupler is characterized by further comprising:

[0040] The optical transmitter (3) is a light-emitting diode (LED).

[0041] Further, a temperature-sensitive optocoupler is characterized by further comprising:

[0042] The optical receiver (4) is a photosensitive transistor, such as a photosensitive diode or a photosensitive triode.

[0043] Further, a temperature-sensitive optocoupler is characterized by further comprising:

[0044] The temperature-sensitive body (2) is made of plastic containing temperature-sensitive color-changing powder.

[0045] Selecting temperature-sensitive color-changing powders with different color-changing situations will produce different effects. The following are two examples to illustrate:

[0046] Example 1:

[0047] When the temperature is lower than the color-changing temperature of the temperature-sensitive body (2), the temperature-sensitive body (2) is transparent; when the temperature is higher than the color-changing temperature of the temperature-sensitive body (2), the temperature-sensitive body (2) becomes opaque; when the temperature returns to below the color-changing temperature of the temperature-sensitive body (2), the temperature-sensitive body (2) returns to being transparent again. Therefore, if the optical receiver (4) can receive the light emitted by the optical transmitter (3), it indicates that the temperature is lower than the color-changing temperature of the temperature-sensitive body (2); if the optical receiver (4) cannot receive the light emitted by the optical transmitter (3), it indicates that the temperature is higher than the color-changing temperature of the temperature-sensitive body (2); thus, it is possible to determine whether the temperature exceeds the color-changing temperature of the temperature-sensitive body (2) according to whether the optical receiver (4) can receive the light emitted by the optical transmitter (3), thereby achieving the purpose of temperature detection;

[0048] It can also be understood that when the temperature is higher than the color-changing temperature of the temperature-sensitive body (2), the temperature-sensitive optocoupler does not work; when the temperature is lower than the color-changing temperature of the temperature-sensitive body (2), the temperature-sensitive optocoupler works. Therefore, it is possible to determine whether the temperature exceeds the color-changing temperature of the temperature-sensitive body (2) according to whether the temperature-sensitive optocoupler works.

[0049] Example 2:

[0050] When the temperature is lower than the color-changing temperature of the temperature-sensitive body (2), the temperature-sensitive body (2) is opaque; when the temperature is higher than the color-changing temperature of the temperature-sensitive body (2), the temperature-sensitive body (2) becomes transparent; when the temperature returns below the color-changing temperature of the temperature-sensitive body (2), the temperature-sensitive body (2) returns to being opaque. Therefore, if the light receiver (4) can receive the light emitted by the light emitter (3), it indicates that the temperature is higher than the color-changing temperature of the temperature-sensitive body (2); if the light receiver (4) cannot receive the light emitted by the light emitter (3), it indicates that the temperature is lower than the color-changing temperature of the temperature-sensitive body (2); thus, it is possible to determine whether the temperature exceeds the color-changing temperature of the temperature-sensitive body (2) based on whether the light receiver (4) can receive the light emitted by the light emitter (3), thereby achieving the purpose of temperature detection;

[0051] It can also be understood that when the temperature is higher than the color-changing temperature of the temperature-sensitive body (2), the temperature-sensitive optocoupler works; when the temperature is lower than the color-changing temperature of the temperature-sensitive body (2), the temperature-sensitive optocoupler does not work. Therefore, it is possible to determine whether the temperature exceeds the color-changing temperature of the temperature-sensitive body (2) based on whether the temperature-sensitive optocoupler is working.

[0052] When the light receiver (4) can receive the light emitted by the light emitter (3), the light receiver (4) conducts; when the light receiver (4) cannot receive the light emitted by the light emitter (3), the light receiver (4) does not conduct; whether the light receiver (4) conducts or not is a digital signal 0 / 1 that can be directly utilized by a single-chip microcomputer. Therefore, by applying the temperature-sensitive optocoupler proposed in this application, an analog-to-digital conversion circuit can be omitted, saving costs.

[0053] A suitable temperature-sensitive color-changing powder can be selected according to the application scenario; for example, the operating temperature of a polymer battery is -20 to 60 degrees, then we can select a temperature-sensitive color-changing powder with a color-changing temperature of 60 degrees to manufacture the temperature-sensitive body (2), so that the temperature-sensitive optocoupler can be applied to the temperature monitoring of polymer battery products (such as power banks).

[0054] The temperature-sensitive optocoupler proposed in this application is basically the same as a common optocoupler in structure. The main difference is that: the transparent object in the common optocoupler has no temperature-sensing function and no heat-conducting metal block, while the transparent object in the temperature-sensitive optocoupler proposed in this application contains a temperature-sensitive color-changing powder and has a temperature-sensing function;

[0055] As long as the transparent body in the common optocoupler is replaced with the temperature-sensitive body (2), the optocoupler can be made to have a temperature-sensing function, and it becomes the temperature-sensitive optocoupler proposed in this application.

[0056] The above-described embodiments merely represent several implementation manners of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the invention patent of the present invention. It should be noted that for those of ordinary skill in the art, improvements can be made without departing from the concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A temperature-sensitive optocoupler, characterized in that, Comprising: An optical transmitter (3) and an optical receiver (4); Between the optical transmitter (3) and the optical receiver (4), a temperature-sensitive body (2) is provided such that the light emitted by the optical transmitter (3) must pass through the temperature-sensitive body (2) in order to irradiate the optical receiver (4); The temperature-sensitive body (2) is made of a material containing a temperature-sensitive color-changing powder such that when the temperature exceeds the color-changing temperature of the temperature-sensitive color-changing powder, the temperature-sensitive body (2) changes from opaque to transparent or from transparent to opaque; The optical transmitter (3) is provided with an optical transmitter pin (6); the optical receiver (4) is provided with an optical receiver pin (7); The surface of the temperature-sensitive optocoupler body is provided with a housing (1); the housing (1) is made of an opaque insulating material.

2. The temperature-sensitive optocoupler according to claim 1, characterized in that, Further comprising: A heat-conducting metal block (5); One side of the heat-conducting metal block (5) is in contact with the outside, and the other side is in contact with the temperature-sensitive body (2).

3. A temperature-sensitive optocoupler according to claim 1 or 2, characterized in that, Further comprising: The optical transmitter (3) is a light-emitting diode (LED).

4. A temperature-sensitive optocoupler according to claim 1 or 2, characterized in that, Further comprising: The optical receiver (4) is a photosensitive transistor.

5. The temperature-sensitive optocoupler according to claim 1 or 2, characterized in that, Further comprising: The temperature-sensitive body (2) is made of a plastic containing a temperature-sensitive color-changing powder.

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