Humidity sensor circuit

Abstract

The utility model discloses a humidity sensor circuit. The humidity sensor circuit comprises a chip U1 and an acquisition circuit, wherein the chip U1 is connected with the acquisition circuit and is used for data processing of the acquisition circuit; the acquisition circuit comprises an interface J1, a power supply module, a diode D1, a resistor R1, a resistor R2, a resistor R3, a triode Q1 and a triode Q2; the first pin of the interface J1 is connected with the fourth pin of the power supply module and one end of the diode D1. The second pin of the interface J1 is connected with one end of the resistor R2 and the emitter of the triode Q2. The third pin of the interface J1 is connected with the other end of the diode D1 and the third pin of the power supply module. According to the utility model, the humidity in the environment is acquired through the chip U1 and the acquisition circuit, the environment temperature can be measured, and the acquisition circuit has the advantages of good safety and reliability, wide measurement range, high measurement precision, low cost and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of temperature and humidity detection, in particular to a humidity sensor circuit. Background Art

[0002] At present, all industries pay more and more attention to product production, goods management and warehouse storage. Many warehouses store very important materials, such as tobacco, spinning, medicinal materials, food, etc. In order to maintain the quality of stored goods and create an environment suitable for commodity storage, when the temperature and humidity in the warehouse are suitable for commodity storage, we must try to prevent the adverse effects of the climate outside the warehouse on the warehouse; when it is monitored that the temperature and humidity in the warehouse are not suitable for commodity storage, we must take effective measures to adjust the temperature and humidity in the warehouse in time.

[0003] The temperature and humidity acquisition system that is currently widely used uses analog devices to separately collect temperature and humidity, and then linearly processes the collected analog signals and performs filtering and amplification. The temperature and humidity signals collected in this way are easily affected by the on-site environment, and the obtained temperature and humidity values ​​are not stable enough. Utility Model Content

[0004] The utility model aims to provide a humidity sensor circuit to solve the problem in the prior art proposed in the background technology that the temperature and humidity signals are easily affected by the on-site environment and the obtained temperature and humidity values ​​are not stable enough.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A humidity sensor circuit includes a chip U1 and a collection circuit; wherein the chip U1 is connected to the collection circuit and is used for data processing of the collection circuit;

[0007] The acquisition circuit includes an interface J1, a power module, a diode D1, a resistor R1, a resistor R2, a resistor R3, a transistor Q1 and a transistor Q2;

[0008] Pin 1 of the interface J1 is connected to pin 4 of the power module and one end of the diode D1; pin 2 of the interface J1 is connected to one end of the resistor R2 and the emitter of the transistor Q2; pin 3 of the interface J1 is connected to the other end of the diode D1 and pin 3 of the power module;

[0009] The collector of the transistor Q2 is grounded, the base of the transistor Q2 is connected to one end of the resistor R1, and the other end of the resistor R1 is connected to the pin No. 19 of the chip U1;

[0010] The other end of the resistor R2 is connected to the base of the transistor Q1, the collector of the transistor Q1 is grounded, and the emitter of the transistor Q1 is respectively connected to one end of the resistor R3 and pin 20 of the chip U1; the other end of the resistor R3 is connected to the power supply.

[0011] According to the above technical solution, the acquisition circuit also includes a working indication circuit; the working indication circuit includes a diode D2 and a resistor R4; wherein one end of the diode D2 is connected to the power supply, the other end of the diode D2 is connected to one end of the resistor R4, and the other end of the resistor R4 is connected to pin 12 of the chip U1.

[0012] According to the above technical solution, the diode D2 is a light emitting diode.

[0013] According to the above technical solution, the acquisition circuit also includes a power supply circuit; the power supply circuit includes a capacitor C1, one end of the capacitor C1 is connected to the power supply, and the other end of the capacitor C1 is grounded.

[0014] According to the above technical solution, capacitor C1 is a tantalum capacitor.

[0015] According to the above technical solution, the acquisition terminal also includes a chip U2, pin 1 of chip U2 is connected to resistor R5, the other end of resistor R5 is connected to pin 11 of chip U1, pin 2 of chip U2 is connected to pin 7 of chip U1, pin 4 of chip U2 is connected to pin 9 of chip U1, pin 6 of chip U2 is connected to pin 10 of chip U1, pin 5 of chip U2 is connected to pin 11 of chip U1, and pins 7, 8, and 9 of chip U2 are all grounded.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] In the utility model, the humidity in the environment is collected through the chip U1 and the collection circuit, and the ambient temperature can be measured. At the same time, the collection circuit has the advantages of good safety and reliability, wide measurement range, high measurement accuracy, and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the humidity collection circuit diagram of the utility model;

[0019] Figure 2 This is the circuit diagram of the chip U1 of the utility model;

[0020] Figure 3 This is the working indication circuit diagram of the utility model;

[0021] Figure 4 This is the power supply circuit diagram of the utility model;

[0022] Figure 5This is a circuit diagram of the chip U2 of the present utility model. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Embodiment 1

[0025] like Figures 1 to 5 As shown, a humidity sensor circuit includes a chip U1 and a collection circuit; wherein the chip U1 (such as Figure 2 As shown) is connected with the acquisition circuit for data processing of the acquisition circuit;

[0026] like Figure 1 As shown, the acquisition circuit includes an interface J1, a power module, a diode D1, a resistor R1, a resistor R2, a resistor R3, a transistor Q1 and a transistor Q2;

[0027] Pin 1 of the interface J1 is connected to pin 4 of the power module and one end of the diode D1; pin 2 of the interface J1 is connected to one end of the resistor R2 and the emitter of the transistor Q2; pin 3 of the interface J1 is connected to the other end of the diode D1 and pin 3 of the power module;

[0028] The collector of the transistor Q2 is grounded, the base of the transistor Q2 is connected to one end of the resistor R1, and the other end of the resistor R1 is connected to the pin No. 19 of the chip U1;

[0029] The other end of the resistor R2 is connected to the base of the transistor Q1, the collector of the transistor Q1 is grounded, and the emitter of the transistor Q1 is respectively connected to one end of the resistor R3 and pin 20 of the chip U1; the other end of the resistor R3 is connected to the power supply.

[0030] In the utility model, the humidity in the environment is collected through the chip U1 and the collection circuit, and the ambient temperature can be measured. At the same time, the collection circuit has the advantages of good safety and reliability, wide measurement range, high measurement accuracy, and low cost.

[0031] The circuit operating voltage of the utility model is low DC 2.2-5.5V, the power consumption of chip U1 and chip U2 is extremely low, the shell is made of insulating flame-retardant material, the measuring range is -40~125℃, and the measuring accuracy is 1%.

[0032] Embodiment 2

[0033] This embodiment is a further refinement of the first embodiment.

[0034] The acquisition circuit also includes a working indication circuit; such as Figure 3 As shown, the working indication circuit includes a diode D2 and a resistor R4; wherein one end of the diode D2 is connected to the power supply, the other end of the diode D2 is connected to one end of the resistor R4, and the other end of the resistor R4 is connected to pin No. 12 of the chip U1.

[0035] The diode D2 is a light emitting diode.

[0036] like Figure 4 As shown, the acquisition circuit also includes a power supply circuit; the power supply circuit includes a capacitor C1, one end of the capacitor C1 is connected to the power supply, and the other end of the capacitor C1 is grounded.

[0037] Capacitor C1 is a tantalum capacitor.

[0038] like Figure 2 As shown, the acquisition terminal also includes a chip U2, which is used to measure ambient temperature and ambient humidity. Pin 1 of chip U2 is connected to resistor R5, and the other end of resistor R5 is connected to pin 11 of chip U1. Pin 2 of chip U2 is connected to pin 7 of chip U1, pin 4 of chip U2 is connected to pin 9 of chip U1, pin 6 of chip U2 is connected to pin 10 of chip U1, pin 5 of chip U2 is connected to pin 11 of chip U1, and pins 7, 8, and 9 of chip U2 are all grounded.

[0039] The utility model includes a power supply circuit, a work indication circuit, and a collection circuit; the circuit is encapsulated in a shell as a whole and placed in the measured environment. The chip U2 is used as a temperature and humidity measuring element. It sends the measured temperature value to the chip U1 through the data interface. The chip U1 sends the temperature value and the humidity value to the corresponding display device, so that the temperature and humidity of the measured space can be intuitively seen on site; the status indicator light is on to indicate that the circuit is working normally, and when the indicator light is off, it indicates that the circuit is working abnormally.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A humidity sensor circuit, characterized in that: It includes a chip U1 and a collection circuit; wherein the chip U1 is connected to the collection circuit and is used for data processing of the collection circuit; The acquisition circuit includes an interface J1, a power module, a diode D1, a resistor R1, a resistor R2, a resistor R3, a transistor Q1 and a transistor Q2; Pin 1 of the interface J1 is connected to pin 4 of the power module and one end of the diode D1; pin 2 of the interface J1 is connected to one end of the resistor R2 and the emitter of the transistor Q2; pin 3 of the interface J1 is connected to the other end of the diode D1 and pin 3 of the power module; The collector of the transistor Q2 is grounded, the base of the transistor Q2 is connected to one end of the resistor R1, and the other end of the resistor R1 is connected to the pin No. 19 of the chip U1; The other end of the resistor R2 is connected to the base of the transistor Q1, the collector of the transistor Q1 is grounded, and the emitter of the transistor Q1 is respectively connected to one end of the resistor R3 and pin 20 of the chip U1; the other end of the resistor R3 is connected to the power supply.

2. A humidity sensor circuit according to claim 1, characterized in that: The acquisition circuit also includes a working indication circuit; the working indication circuit includes a diode D2 and a resistor R4; wherein one end of the diode D2 is connected to the power supply, the other end of the diode D2 is connected to one end of the resistor R4, and the other end of the resistor R4 is connected to pin 12 of the chip U1.

3. A humidity sensor circuit according to claim 2, characterized in that: The diode D2 is a light emitting diode.

4. A humidity sensor circuit according to claim 1, characterized in that: The acquisition circuit also includes a power supply circuit; the power supply circuit includes a capacitor C1, one end of the capacitor C1 is connected to the power supply, and the other end of the capacitor C1 is grounded.

5. A humidity sensor circuit according to claim 4, characterized in that: Capacitor C1 is a tantalum capacitor.

6. A humidity sensor circuit according to claim 1, characterized in that: The acquisition terminal also includes chip U2, pin 1 of chip U2 is connected to resistor R5, the other end of resistor R5 is connected to pin 11 of chip U1, pin 2 of chip U2 is connected to pin 7 of chip U1, pin 4 of chip U2 is connected to pin 9 of chip U1, pin 6 of chip U2 is connected to pin 10 of chip U1, pin 5 of chip U2 is connected to pin 11 of chip U1, and pins 7, 8, and 9 of chip U2 are all grounded.

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