Partial pressure acquisition board

Abstract

The utility model discloses a partial pressure acquisition board, which comprises a circuit board, a signal input terminal, a signal output terminal and resistors connected in parallel at two ends of the signal input terminal and the signal output terminal are welded on the circuit board, and through holes are reserved at four corners of the circuit board. The voltage-dividing acquisition board adopting the structure is small in size, convenient to install and maintain, high in structural reliability and capable of dividing large voltage inside a power supply into small voltage for a post-stage module to acquire voltage signals.

Description

Technical Field

[0001] The present invention relates to the field of voltage division and acquisition, in particular to a voltage division and acquisition board. Background Art

[0002] The power supply of the magnetic resonance magnet magnetic field needs to monitor the load voltage and the voltage drop of the adjustment tube in real time to ensure the stability of the current. This function is achieved by connecting a group of resistors in parallel at both ends of the load and the adjustment tube CE to divide the large voltage inside the power supply into small voltages for the subsequent module to collect the voltage signal.

[0003] The current structure uses thermoplastic tubes to encapsulate welded resistors and then fix them directly to the cabinet frame. However, there are problems such as: 1. the insulation layer needs to be destroyed during maintenance; 2. the resistor legs are easily broken; 3. the resistors are inconvenient to replace; and 4. the structural reliability is poor. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a voltage dividing and collecting board which is easy to install and maintain and has high structural reliability.

[0005] In order to solve the above technical problems, the present invention provides a voltage divider acquisition board, including a circuit board, on which a signal input terminal, a signal output terminal and a resistor connected in parallel at both ends of the signal input terminal and the signal output terminal are welded, and through holes are left at the four corners of the circuit board.

[0006] In order to further solve the technical problem to be solved by the present invention, the voltage divider acquisition board provided by the present invention has two groups of resistors, one group is conventional color ring resistors for dividing the load output voltage and tube voltage drop, and the other group is low-temperature drift resistors for dividing high-precision voltage; each connection port on the circuit board is clearly marked.

[0007] The present invention adopts such a structure so that various components are integrated on the circuit board and fixedly installed in the chassis by bolts. In addition, each connection port on the circuit board is clearly marked, which makes installation and maintenance convenient and the structural reliability high. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0009] Figure 1 It is a circuit connection diagram of the voltage dividing acquisition board of the present invention.

[0010] Figure 2 It is a schematic diagram of the three-dimensional structure of the voltage dividing and collecting board of the present invention.

[0011] Among them, 1 is resistor R1, 2 is resistor R2, 3 is resistor R3, 4 is resistor R4, 5 is signal input terminal; 6 is signal output terminal; 7 is circuit board. DETAILED DESCRIPTION

[0012] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0013] like Figure 1 、 Figure 2 As shown, the voltage divider acquisition board includes a circuit board, on which a signal input terminal 5, a signal output terminal 6, and a resistor connected in parallel at both ends of the signal input terminal 5 and the signal output terminal 6 are welded. Through holes are left at the four corners of the circuit board 7, which is fixed to the cabinet frame by bolts to ensure the stability of the overall structure.

[0014] There are two groups of resistors, one group is the conventional color ring resistors R1 and R2 used to divide the load output voltage and the tube voltage drop, and the other group is the low temperature drift resistors R3 and R4 used to divide the high precision voltage.

[0015] Load output voltage acquisition (ADC): The conventional AD acquisition voltage range is generally (±10V), but the load voltage may be 100V. At this time, the voltage needs to be reduced to the range of the AD acquisition signal. For example, the AD7768-1 AI input voltage must not be greater than 5V; system tube voltage drop detection: Under normal circumstances, the voltage is between 6-10V. If a fault occurs, the voltage may reach the maximum voltage of the previous stage (for example, 100V), which will damage the AD chip. Therefore, the voltage must be reduced to a safe range. To achieve this, conventional color ring resistors R1 and R2 can be connected in parallel at both ends of the load or adjustment tube to achieve a voltage divider.

[0016] High-precision DCCT (0-10V) signal acquisition. When the DCCT signal is supplied to the PI controller (operational amplifier), the collected voltage must be adjusted according to actual needs. Therefore, this can be achieved by using low-temperature drift resistors R3 and R4 connected in parallel at both ends of the high-precision DCCT output voltage to divide the voltage.

[0017] Each connection port on the circuit board 7 is clearly marked, which facilitates installation and prevents incorrect connection.

[0018] The circuit board 7 is small in size, with a panel size of only 27 mm×54 mm.

[0019] like Figure 2 As shown, the "+" end of the signal input terminal 5 is connected to the positive pole of the detection signal, and the "-" end of the signal input terminal 5 is connected to the negative pole of the detection signal; the "+" end of the signal output terminal 6 is the positive pole of the detection signal, and the "-" end of the signal output terminal 6 is the negative pole of the detection signal. The voltage divider value can be measured through the voltage divider end of the signal input terminal 5 or the positive and negative ends of the signal output terminal.

[0020] Therefore, the present invention adopts the voltage dividing acquisition board of the above structure, which is small in size, easy to install and maintain, has high structural reliability and can divide the large voltage inside the power supply into small voltages for the subsequent module to collect voltage signals.

[0021] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the same. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solutions of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A voltage dividing acquisition board, characterized in that: The circuit board comprises a signal input terminal, a signal output terminal and a resistor connected in parallel at both ends of the signal input terminal and the signal output terminal. Through holes are left at the four corners of the circuit board.

2. The voltage dividing acquisition board according to claim 1, characterized in that: There are two groups of resistors, one group is conventional color ring resistors used to divide the load output voltage and tube voltage drop, and the other group is low temperature drift resistors used to divide high precision voltage.

3. The voltage dividing acquisition board according to claim 2, characterized in that: Each connection port on the circuit board is clearly marked.

Images