TWI437241B - Programmable circuit detection structure and detection method of cooling fan - Google Patents

Description

Programmable circuit detection structure and detection method for cooling fan

The invention relates to a heat dissipation fan, in particular to an innovative designer of a programmable circuit detection structure and detection method of a heat dissipation fan.

According to the definition, the cooling fan is a unit device in a computer, an electronic product or a device. Therefore, after the manufacturing of the cooling fan, it is usually transported to the assembly factory and other unit devices for assembly, and the final product can be made.

The quality inspection procedure is an important and unavoidable part of any manufacturing industry. The assembly plant will inspect the cooling fan according to the procedure. If the defect is detected, the whole batch will be returned to the fan manufacturer. The manufacturing plant is bound to cause serious cost and damage, which shows that the detection of the cooling fan before leaving the factory is extremely important.

The detection method of the conventional cooling fan is to detect the pulse signal (PWM) and transmit it to the computer with the feedback contact (FG). This method can detect whether the fan speed is normal; the second detection method is to detect the RD signal. : This is a signal generated after a logical judgment. The fan circuit board has a built-in logic circuit to pre-determine the two states of the cooling fan as "normal operation" or "locked" according to its default value. Then, the logic signal is externally read to determine the obtained signal. The detection method has only two kinds of signal results, and there is no other intermediate value, so the detection accuracy is poor, and the detection failure rate is increased; the third detection method is to integrate the foregoing two Kind of composite detection mode.

However, the aforementioned various fan detection methods are still insufficient to meet the special needs of the current related products; for example, the cloud system server uses the heat dissipation wind. The role of the fan is very important, so the accuracy of its detection is relatively more important. If unnecessary maintenance is required, it will cause huge commercial losses. For such special needs, another industry has developed another known fan detection method. As shown in FIG. 1 , the detection method is disposed outside the fan main circuit module 10 and further includes a microprocessor 11 (MCU), which is connected to the signal feedback contact 12 of the fan main circuit module 10 ( FG) is electrically connected, and a post-transistor 14 (Q1) is disposed between the microprocessor 11 and its detection signal (RDA) output terminal 13. The microprocessor 11 is programmed with a detection program 15 for detecting the program. 15 Built-in a variety of setting conditions such as: setting the start within 10 seconds without judgment, not lower than the specific speed without judgment, below a certain speed and lasting more than 10 seconds, judged as abnormal and so on, the setting conditions Depending on the customer's needs, this method can be used to obtain a conditional fan detection method. However, although this fan detection method can achieve high precision detection results, the following problems and drawbacks still exist. 1. The detection program 15 of the microprocessor 11 has a part that has not been successfully burned, and cannot be detected; and the portion of the rear transistor 14 with or without a short circuit or a broken circuit cannot be detected; 2. The detection program 15 If the setting conditions include the time condition, subject to the time condition, it will inevitably lead to the problem that the detection time is too long, the detection efficiency is lowered, and the cost is relatively increased. 3. The detection method cannot detect the speed part (Note: because the speed can be obtained) The signal outputted by the fan main circuit module signal feedback contact 12 has been changed by the microprocessor logic; therefore, the flashing frequency measuring instrument is usually additionally used to directly detect the fan blade, which is troublesome and time consuming. Problems and shortcomings.

The supplementary point is that although the above-mentioned conditional fan detection method can accurately and accurately detect whether the fan is indeed damaged, the detection is actually suitable for the detection and confirmation when the problem occurs during the use of the fan, but when the fan is shipped from the factory. In terms of testing operations, there are problems such as slow detection efficiency and difficulty in responding to requirements, and the increase in cost does not correspond to the benefits of industrial use.

Therefore, in view of the problems existing in the above-mentioned circuit detection structure and method of the conventional cooling fan, how to develop an innovative design with more ideal practicability, and the relevant industry should further consider the goal and direction of breakthrough.

In view of this, the inventor has been engaged in the manufacturing development and design experience of related products for many years. After detailed design and careful evaluation, the inventor has finally obtained the practical invention.

The main object of the present invention is to provide a programmable circuit detection structure and detection method for a cooling fan, and the problem to be solved is to develop a new type of cooling fan circuit detection structure and method which is more ideal and practical. Considering innovative breakthroughs for the target; the programmable circuit of the cooling fan includes a main electronic control module and a microprocessor, the main electronic control module includes a signal feedback contact, and the microprocessor is connected to the signal feedback contact. To input an initial feedback signal to the microprocessor, the microprocessor includes a signal output circuit; the technical feature of the problem solving of the present invention is mainly that the microprocessor has a main logic program and a detection program, the main Logical pair After the initial feedback signal input by the signal feedback contact is subjected to the logical determination of the conditional setting, a logic detection signal is output through the signal output circuit, and the sub-detection program passes the signal output circuit in the form of not performing the logic judgment. Directly outputting the initial feedback signal; and the programmable circuit includes a switching contact to switch the initial feedback signal through the main logic program or the secondary detection program; thereby creating an innovative and unique design, so that the present invention can be compared with the prior art The circuit detection of the cooling fan can be quickly switched from the mode of detecting the logic detection signal to the mode of detecting the initial feedback signal, in order to meet the logic detection requirements of different setting conditions, thereby improving the efficiency, function and quality of the circuit detection operation when the fan is shipped or repaired. Advantages and practical advancement.

Please refer to FIG. 2 and FIG. 4, which are preferred embodiments of the programmable circuit detection structure and detection method of the heat dissipation fan of the present invention, but the embodiments are for illustrative purposes only, and are not applicable to the patent application. The programmable circuit A of the cooling fan includes a main electronic control module 20 and a microprocessor 30, wherein the main electronic control module 20 includes a signal feedback contact 21 (FG), the microprocessor 30 is connected to the signal feedback contact 21 to input an initial feedback signal 40 to the microprocessor 30. The microprocessor 30 includes a signal output circuit 31. The microprocessor 30 has a main logic program 32 therein. And a detection program 33. The main logic program 32 performs a conditional logic determination on the initial feedback signal 40 input by the signal feedback contact 21, and then outputs a logic detection signal 50 through the signal output circuit 31. The program 33 is configured to cause the initial feedback signal 40 to directly output the initial feedback signal 40 through the signal output circuit 31 in a form that does not perform a logic judgment; and wherein the programmable circuit A includes a switching contact 60, thereby cutting The initial feedback signal line 40 through the main logic program 32 or a sub-program detector 33; The innovative design of the present invention enables the circuit detection of the cooling fan to quickly switch from the mode of detecting the logic detection signal 50 back to the mode of detecting the initial feedback signal 40, in response to the logic detection requirements of different setting conditions, as shown in FIG. The switching circuit 60 is configured to pass the detection circuit state of the main logic program 32. In this state, the main logic program 32 can perform a conditional logic determination on the initial feedback signal 40 input by the signal feedback contact 21. Then, a logic detection signal 50 is outputted through the signal output circuit 31. As shown in FIG. 3, the switching circuit 60 passes the detection circuit state of the sub-detection program 33. In this state, the sub-detection program 33 is ordered. The initial feedback signal 40 passes through the signal output circuit 31 in a form that does not perform a logic judgment. Therefore, it is still outputting the detection state of the initial feedback signal 40. The detection mode shown in FIG. 3 can achieve a relatively fast and efficient detection effect. And the items that can be detected and confirmed include: 1. Check whether the fan speed is normal (Note: the initial feedback signal can be directly read); 2. Detection Whether the main logic program 32 and the sub-detection program 33 burned in the fan microprocessor 30 are normal (Note: if it can be confirmed that the sub-detection program 33 is normal, the main logic program 32 is also normal); 3. The detection of the fan can be Whether the program circuit A is normal (Note: because the detection signal can be read, it means that at least the circuit of the main electronic control module 20 and the microprocessor 30 is normally intact); and these matters are sufficient for the general requirement level of the general fan. It can be seen that the practical application of the present invention can particularly improve the efficiency, function and quality of the circuit detection operation when the fan is shipped (or during maintenance); and when it is necessary to perform more detailed detection of the fan, with a plurality of setting conditions, only need to With the design of the switching contact 60, the initial feedback signal 40 is passed through the detection mode of the main logic program 32, so that a more detailed fan detection operation can be performed.

The main electronic control module 20 and the microprocessor 30 can be separately arranged or integrated. As shown in FIG. 4, the main electronic control module 20 and the microprocessor 30 are separately disposed. The embodiment diagram is shown in FIG. 5, which is an embodiment of the main electronic control module 20 and the microprocessor 30.

As shown in FIG. 6 and FIG. 7 , the switching contact 60 can be formed by disconnecting two electrical contacts 61 , 62 , wherein one of the electrical contacts 61 is electrically connected to the microprocessor 30 . The other electrical contact 62 is in a grounded state (as indicated by the arrow L1 in FIG. 7), and the two electrical contacts 61 and 62 are disposed in the structure of the cooling fan 70 for the programmable circuit A to be set. a circuit board 71 is provided at one place, and a jack 72 is disposed at the same place, so that the two electrical contacts 61, 62 are disposed at two opposite intervals in the jack 72, and a plug 80 is further provided. The device 80 is provided with a conductive insertion end 81 for inserting the insertion hole 72 (shown by an arrow L2 in FIG. 7) to form a conductive state of the two electrical contacts 61 and 62. The state is to switch the initial feedback signal 40. The mode of the initial feedback signal 40 (as shown in Fig. 3) is detected by the sub-detection program 33.

As shown in FIG. 8 and FIG. 9 , the switching contact 60 can also be an electrical contact 63. The electrical contact 63 is electrically connected to the microprocessor 30, so that the electrical contact 63 is provided. A grounding conduction tool 90 is further disposed on a side of a circuit board 71 for the programmable circuit A in the structure of the cooling fan 70. The grounding conduction tool 90 is provided with a grounding end 91 and an abutting end 92. The grounding state of the electrical contact 63 is formed by the 92 contact with the electrical contact 63. The state is to switch the initial feedback signal 40 through the sub-detection program 33, that is, the mode of detecting the initial feedback signal 40 (such as the third The state shown in the figure).

It can be understood from the embodiment of the above-mentioned 6th to 9th that the switching principle of the switching contact can be achieved by using a grounding method, and the advantage of this method is that the detection mode of the fan is fixed under normal conditions. The initial feedback signal 40 passes through the detection mode of the main logic program 32, and when the fan detection operation causes the switching contact 60 to be grounded by the tool (ie, the aforementioned plug 80 or the grounding conduction tool 90), the initial feedback is switched. The signal 40 is a detection mode by the sub-detection program 33. Of course, the switching manner of the switching contact is not limited thereto, and the use of other existing switching switches to achieve the switching is also a specific implementation.

Further, in the method of the present invention, the programmable circuit detecting method includes: (refer to FIGS. 2 and 3) burning a main logic program 32 and a detection in the microprocessor 30. In the program 33, the main logic program 32 performs a conditional logic determination on the initial feedback signal 40 input by the signal feedback contact 21, and then outputs a logic detection signal 50 through the signal output circuit 31, and the sub-detection program 33 is The initial feedback signal 40 is directly outputted by the signal output circuit 31 in the form of not performing the logic judgment. The initial feedback signal 40 is switched by the switching means to pass the main logic program 32 or the sub-detection program 33; The specific implementation of the switching means can be referred to in the foregoing embodiments and in the figures 6 to 10, that is, the description is not repeated.

Advantages of the invention:

The "detectable circuit detection structure and detection method of the heat dissipation fan" mainly comprises a main logic program and a sub-detection program in the microprocessor, and can switch the initial feedback signal through the main logic program or the vice by a switching contact. The innovative and unique design of the detection program enables the present invention to quickly switch from the mode of detecting the logic detection signal to the mode of detecting the initial feedback signal in comparison with the conventional structure and method proposed in the prior art. According to this, it is possible to meet the logic detection requirements of different setting conditions, and to achieve the advantages and practical progress of improving the efficiency, function and quality of the circuit detection operation when the fan is shipped or repaired.

The above embodiments are intended to be illustrative of the present invention, and are not to be construed as limiting the scope of the invention. The principles are changed and modified to achieve an equivalent purpose, and such changes and modifications are to be included in the scope defined by the scope of the patent application as described later.

Conventional part:

10‧‧‧Main Circuit Module

11‧‧‧Microprocessor

12‧‧‧Signal feedback contacts

13‧‧‧Detection signal output

14‧‧‧After the transistor

15‧‧‧Detection program

Part of the invention:

A‧‧‧programmable circuit

20‧‧‧Main electronic control module

21‧‧‧Signal feedback contacts

30‧‧‧Microprocessor

31‧‧‧ Signal output circuit

32‧‧‧Main logic program

33‧‧‧Subtest

40‧‧‧Initial feedback signal

50‧‧‧Logical detection signal

60‧‧‧Switch contacts

61, 62, 63‧‧‧ electrical contacts

70‧‧‧ cooling fan

71‧‧‧Circuit board

72‧‧‧ jack

80‧‧‧Insert

81‧‧‧Electrical insertion end

90‧‧‧ Grounding Tools

91‧‧‧ Grounding terminal

92‧‧‧Right end

Figure 1: Schematic diagram of the structure of the conventional fan detection method.

FIG. 2 is a block diagram showing the circuit architecture of the preferred embodiment of the present invention and a state of the detection mode 1.

Figure 3 is a schematic diagram showing the state of the detection mode of the preferred embodiment of the present invention.

Fig. 4 is a circuit diagram showing an embodiment in which the main electronic control module and the microprocessor of the present invention are separately provided.

Fig. 5 is a circuit diagram showing an embodiment of the integrated arrangement of the main electronic control module and the microprocessor of the present invention.

Figure 6 is a plan sectional view showing a specific embodiment of the switching contact of the present invention.

Fig. 7 is an enlarged view of a portion B of Fig. 6.

Figure 8 is a plan sectional view showing a second embodiment of the switching contact of the present invention.

Fig. 9 is an enlarged view of a portion C of Fig. 8.

A‧‧‧programmable circuit

20‧‧‧Main electronic control module

21‧‧‧Signal feedback contacts

30‧‧‧Microprocessor

31‧‧‧ Signal output circuit

32‧‧‧Main logic program

33‧‧‧Subtest

40‧‧‧Initial feedback signal

60‧‧‧Switch contacts

Claims (5)

The programmable circuit detecting structure of the cooling fan includes a main electronic control module and a microprocessor, wherein the main electronic control module includes a signal feedback contact (FG), the micro The processor is connected to the signal feedback contact to input an initial feedback signal to the microprocessor, and the microprocessor includes a signal output circuit; wherein the microprocessor has a main logic program and a detection program. The main logic program performs a conditional logic determination on the initial feedback signal input to the signal feedback contact, and then outputs a logic detection signal through the signal output circuit, and the auxiliary detection program causes the initial feedback signal to not perform logic judgment. Forming the initial feedback signal directly through the signal output circuit; and wherein the programmable circuit includes a switching contact, thereby switching the initial feedback signal through the main logic program or the auxiliary detection program; thereby, the heat dissipation can be performed The circuit detection of the fan can quickly switch from the mode of detecting the logic detection signal to the mode of detecting the initial feedback signal. The efficiency, function and quality of the circuit inspection operation when the fan is shipped or repaired can be improved by the logic detection requirements according to different setting conditions. The programmable circuit detecting structure of the cooling fan according to the first aspect of the patent application, wherein the main electronic control module and the microprocessor are separately arranged or integrated. The programmable circuit detecting structure of the heat dissipating fan according to claim 1, wherein the switching contact is formed by a disconnected two-electric contact, wherein the one of the electrical contacts and the microprocessor Electrically connected, the other electrical contact is grounded, and the two electrical contacts are disposed in a cooling fan structure for a circuit board disposed at the programmable circuit, where a jack is provided to Separating two electrical contacts into the jack The two slots are opposite to each other, and a plug is provided. The plug is provided with a conductive insertion end for inserting the jack to form a conductive state of the two electrical contacts. The state is to switch the initial feedback signal through the secondary detection program. , that is, the mode of detecting the initial feedback signal. The programmable circuit detecting structure of the cooling fan according to the first aspect of the patent application, wherein the switching contact is formed by an electrical contact, and the electrical contact is electrically connected to the microprocessor, so that the The electrical contact is disposed at a side of a circuit board of the heat dissipation fan structure for the programmable circuit, and a grounding conduction tool is further disposed. The grounding conduction tool is provided with a grounding end and an abutting end. The electrical contact ground state is formed by the electrical contact, and the state is a mode for switching the initial feedback signal through the sub-detection program, that is, detecting the initial feedback signal. A programmable circuit detecting method for a cooling fan, the programmable circuit of the cooling fan includes a main electronic control module and a microprocessor, wherein the main electronic control module includes a signal feedback contact (FG), the micro The processor is connected to the signal feedback contact to input an initial feedback signal to the microprocessor, and the microprocessor includes a signal output circuit. The programmable circuit detection method includes: burning a program in the microprocessor a main logic program and a detection program, the main logic program performs a conditional logic determination on the initial feedback signal input by the signal feedback contact, and then outputs a logic detection signal through the signal output circuit, and the auxiliary detection program is And causing the initial feedback signal to directly output the initial feedback signal through the signal output circuit in a form that does not perform a logic judgment; and switching the initial feedback signal through the main logic through a switching means Program or sub-detection program; thereby, the circuit detection of the cooling fan can be quickly switched from the mode of detecting the logic detection signal to the mode of detecting the initial feedback signal, so as to enhance the fan according to the logic detection requirements of different setting conditions. The efficiency, function and quality of the circuit inspection operation at the time of shipment or maintenance.