CN213903403U - Circuit board humidity detection device - Google Patents
Circuit board humidity detection device Download PDFInfo
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- CN213903403U CN213903403U CN202023031035.1U CN202023031035U CN213903403U CN 213903403 U CN213903403 U CN 213903403U CN 202023031035 U CN202023031035 U CN 202023031035U CN 213903403 U CN213903403 U CN 213903403U
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Abstract
The utility model relates to a circuit board humidity detection device, which comprises a detection head and a shell; a detection amplifying circuit, a detection delay circuit and a low-frequency oscillator are arranged in the shell; the detection head is a humidity sensitive resistor R1; the detection amplifying circuit includes: the humidity sensitive resistor R1, the first triode VT1 and the second triode VT 2; the detection delay circuit comprises a fourth resistor R4 and a first capacitor C1; the low frequency oscillator includes: a third transistor VT3 and a fourth transistor VT 4. The utility model discloses circuit board humidity detection device shows PM drive card operational environment's humidity in real time, appears unusual suggestion and in time clears up, when the glue solution splashes special winding equipment industrial computer PM drive card, detection device detects PM drive card humidity and surpasss the allowed band, sends the warning, maintains that the maintenance personal in time clears up PM drive card surface, and the extension is with winding equipment industrial computer PM drive card life, improves production efficiency, reduction in production cost.
Description
Technical Field
The utility model relates to a humidity detection device, specific theory relates to a circuit board humidity detection device.
Background
In the prior art, each winding device is provided with an industrial personal computer, a PM driving plate is installed on the industrial personal computer, and the PM driving plate is burnt in the use process due to the fact that glue solution splashes when the PM winding device works and environment humidity of the PM driving plate is caused and cannot be maintained in time, so that the PM driving card is expensive to maintain after being damaged and affects normal production.
At present, the PM drive plate of the industrial personal computer is maintained and maintained every quarter,
SUMMERY OF THE UTILITY MODEL
Not enough to above-mentioned prior art, the utility model provides a simple structure, convenient operation can guarantee that PM drive card has a good operational environment's circuit board humidity detection device.
The utility model adopts the technical proposal that:
a circuit board humidity detection device comprises a detection head and a shell; a detection amplifying circuit, a detection delay circuit and a low-frequency oscillator are arranged in the shell;
the detection head is a humidity sensitive resistor R1;
the detection amplifying circuit includes: the humidity sensitive resistor R1, the first triode VT1 and the second triode VT 2;
the detection delay circuit comprises a fourth resistor R4 and a first capacitor C1;
the low frequency oscillator includes: a third transistor VT3 and a fourth transistor VT 4;
one end of the humidity-sensitive resistor R1 is respectively connected with one end of the third resistor R3, one end of the fourth resistor R4, an emitter of the fourth triode VT4, the anode of the third capacitor C3 and one end of the switch S;
the other end of the humidity sensitive resistor R1 is connected with one end of a second resistor;
the other end of the second resistor R2 is connected with the base of the first triode VT 3;
the collector of the first triode VT1 is connected with the base of the second triode VT2 and the other end of the third resistor R3;
the collector of the second triode VT2 is connected with the other end of the fourth resistor R4, the positive electrode of the first capacitor C1 and one end of the fifth resistor R5;
the other end of the fifth resistor R5 is connected with one end of the second capacitor and the base of the third triode VT 3;
the collector of the third triode VT3 is connected with the base of the fourth triode VT 4;
the collector of the fourth transistor VT4 is connected to one end of the sixth resistor R6;
the other end of the sixth resistor R6 is connected with the other end of the second capacitor C2;
the collector of the fourth triode VT4 is connected with the negative pole of the power supply through the loudspeaker BL 1;
an emitting electrode of the first triode VT1, an emitting electrode of the second triode VT2, a negative electrode of the first capacitor C1, an emitting electrode of the third triode VT3 and a negative electrode of the third capacitor C3 are connected with a negative electrode of a power supply; the other end of the switch S is connected with the positive pole of the power supply.
The detection head is connected with the shell through an L-shaped bracket.
The utility model discloses relative prior art's beneficial effect:
the utility model discloses circuit board humidity detection device, simple structure, real-time supervision PM driver card surface humidity guarantees that PM driver card has a good operational environment.
The utility model discloses circuit board humidity detection device shows PM drive card operational environment's humidity in real time, appears unusual suggestion and in time clears up, when the glue solution splashes special winding equipment industrial computer PM drive card, detection device detects PM drive card humidity and surpasss the allowed band, sends the warning, maintains that the maintenance personal in time clears up PM drive card surface, and the extension is with winding equipment industrial computer PM drive card life, improves production efficiency, reduction in production cost.
The utility model discloses circuit board humidity detection device has glue solution environment humidity to exceed standard the back at the PM card, and the resistance of humidity-sensitive resistor R1 descends a lot, and VT1 base has great electric current like this, and VT1 saturation switches on, and its current collector is low level, makes VT2 end. At this time, the 3V dc voltage charges the capacitor C1 through the resistor R4, this charging circuit is a delay circuit, and after the voltage charged on C1 reaches a certain level, it is added to the base of VT3, so that VT3 and VT4 obtain the normal dc bias voltage and enter the oscillation working state, at this time, the speaker BL1 sounds to give a prompt.
Drawings
FIG. 1 is a block diagram of a combination of a humidity detection device for a circuit board of a dedicated device;
fig. 2 is a control circuit diagram of the humidity detection device of the circuit board of the special equipment.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples:
as can be seen from fig. 1 and 2, the circuit board humidity detection device comprises a detection head and a shell; a detection amplifying circuit, a detection delay circuit and a low-frequency oscillator are arranged in the shell;
the detection head is a humidity sensitive resistor R1;
the detection amplifying circuit includes: the humidity sensitive resistor R1, the first triode VT1 and the second triode VT 2;
the detection delay circuit comprises a fourth resistor R4 and a first capacitor C1;
the low frequency oscillator includes: a third transistor VT3 and a fourth transistor VT 4;
one end of the humidity-sensitive resistor R1 is respectively connected with one end of the third resistor R3, one end of the fourth resistor R4, an emitter of the fourth triode VT4, the anode of the third capacitor C3 and one end of the switch S;
the other end of the humidity sensitive resistor R1 is connected with one end of a second resistor;
the other end of the second resistor R2 is connected with the base of the first triode VT 3;
the collector of the first triode VT1 is connected with the base of the second triode VT2 and the other end of the third resistor R3;
the collector of the second triode VT2 is connected with the other end of the fourth resistor R4, the positive electrode of the first capacitor C1 and one end of the fifth resistor R5;
the other end of the fifth resistor R5 is connected with one end of the second capacitor and the base of the third triode VT 3;
the collector of the third triode VT3 is connected with the base of the fourth triode VT 4;
the collector of the fourth transistor VT4 is connected to one end of the sixth resistor R6;
the other end of the sixth resistor R6 is connected with the other end of the second capacitor C2;
the collector of the fourth triode VT4 is connected with the negative pole of the power supply through the loudspeaker BL 1;
an emitting electrode of the first triode VT1, an emitting electrode of the second triode VT2, a negative electrode of the first capacitor C1, an emitting electrode of the third triode VT3 and a negative electrode of the third capacitor C3 are connected with a negative electrode of a power supply; the other end of the switch S is connected with the positive pole of the power supply.
The detection head is connected with the shell through an L-shaped bracket.
The utility model discloses circuit board humidity detection device, simple structure, real-time supervision PM driver card surface humidity guarantees that PM driver card has a good operational environment.
The utility model discloses circuit board humidity detection device shows PM drive card operational environment's humidity in real time, appears unusual suggestion and in time clears up, when the glue solution splashes special winding equipment industrial computer PM drive card, detection device detects PM drive card humidity and surpasss the allowed band, sends the warning, maintains that the maintenance personal in time clears up PM drive card surface, and the extension is with winding equipment industrial computer PM drive card life, improves production efficiency, reduction in production cost.
The utility model discloses circuit board humidity detection device has glue solution environment humidity to exceed standard the back at the PM card, and the resistance of humidity-sensitive resistor R1 descends a lot, and VT1 base has great electric current like this, and VT1 saturation switches on, and its current collector is low level, makes VT2 end. At this time, the 3V dc voltage charges the capacitor C1 through the resistor R4, this charging circuit is a delay circuit, and after the voltage charged on C1 reaches a certain level, it is added to the base of VT3, so that VT3 and VT4 obtain the normal dc bias voltage and enter the oscillation working state, at this time, the speaker BL1 sounds to give a prompt.
The utility model discloses circuit board humidity detection device installs near corresponding industrial computer PM drive card that pairs with humidity inductive probe, connects the power, and after humidity detection device exceeded standard, humidity-sensitive resistor R1's resistance dropped a lot, and VT1 base has great electric current like this, and VT1 saturation switches on, and its collector is low level, makes second triode VT2 end. At this time, the 3V dc voltage charges the capacitor C1 through the fourth resistor R4, this charging circuit is a delay circuit, and after the voltage charged to the first capacitor C1 reaches a certain level, it is added to the base of the third transistor VT3, so that the third transistor VT3 and the fourth transistor VT4 obtain the normal dc bias voltage and enter the oscillation working state, at this time, the speaker BL1 makes a sound to prompt.
The utility model discloses circuit board humidity detection device uses the working procedure: firstly, the humidity detection probe is installed at a specific position, the device is electrified, and the installation is finished.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the structure of the present invention in any way. All the simple modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention all fall within the scope of the technical solution of the present invention.
Claims (2)
1. The utility model provides a circuit board humidity detection device which characterized in that:
comprises a detection head and a shell; a detection amplifying circuit, a detection delay circuit and a low-frequency oscillator are arranged in the shell;
the detection head is a humidity sensitive resistor R1;
the detection amplifying circuit includes: the humidity sensitive resistor R1, the first triode VT1 and the second triode VT 2;
the detection delay circuit comprises a fourth resistor R4 and a first capacitor C1;
the low frequency oscillator includes: a third transistor VT3 and a fourth transistor VT 4;
one end of the humidity-sensitive resistor R1 is respectively connected with one end of the third resistor R3, one end of the fourth resistor R4, an emitter of the fourth triode VT4, the anode of the third capacitor C3 and one end of the switch S;
the other end of the humidity sensitive resistor R1 is connected with one end of a second resistor;
the other end of the second resistor R2 is connected with the base of the first triode VT 3;
the collector of the first triode VT1 is connected with the base of the second triode VT2 and the other end of the third resistor R3;
the collector of the second triode VT2 is connected with the other end of the fourth resistor R4, the positive electrode of the first capacitor C1 and one end of the fifth resistor R5;
the other end of the fifth resistor R5 is connected with one end of the second capacitor and the base of the third triode VT 3;
the collector of the third triode VT3 is connected with the base of the fourth triode VT 4;
the collector of the fourth transistor VT4 is connected to one end of the sixth resistor R6;
the other end of the sixth resistor R6 is connected with the other end of the second capacitor C2;
the collector of the fourth triode VT4 is connected with the negative pole of the power supply through the loudspeaker BL 1;
an emitting electrode of the first triode VT1, an emitting electrode of the second triode VT2, a negative electrode of the first capacitor C1, an emitting electrode of the third triode VT3 and a negative electrode of the third capacitor C3 are connected with a negative electrode of a power supply; the other end of the switch S is connected with the positive pole of the power supply.
2. The humidity detecting device for circuit board of claim 1, wherein:
the detection head is connected with the shell through an L-shaped bracket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023031035.1U CN213903403U (en) | 2020-12-16 | 2020-12-16 | Circuit board humidity detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023031035.1U CN213903403U (en) | 2020-12-16 | 2020-12-16 | Circuit board humidity detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213903403U true CN213903403U (en) | 2021-08-06 |
Family
ID=77104255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023031035.1U Active CN213903403U (en) | 2020-12-16 | 2020-12-16 | Circuit board humidity detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213903403U (en) |
-
2020
- 2020-12-16 CN CN202023031035.1U patent/CN213903403U/en active Active
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