CN108152717A - A kind of detection device and test method of the high-voltage connecting oralia of LHAASO-WFCTA model machines - Google Patents

Abstract

The invention discloses a detection device and a testing method for a high-voltage interface board of a LHAASO-WFCTA prototype, comprising a plurality of circuit units arranged on the high-voltage interface board; a plurality of circuit units are arranged in parallel between a voltage test point and a grounding point; the circuit unit It includes several resistors and capacitors; several resistors are connected in series; capacitor C1 and capacitor C2 are connected in parallel at both ends of resistor R1; capacitor C3 and capacitor C4 are connected in parallel at both ends of resistor R11; capacitor C5 is arranged in parallel at both ends of resistor R13. According to the distribution position of the resistance and capacitance on the high-voltage interface board, the present invention selects the node of the unit circuit, and adopts the method of directly measuring resistance and the method of stabilizing the power supply to test the resistance value and node voltage of the node, and then simply judges the high-voltage interface Whether the board line is connected.

Description

A detection device and test method for a high-voltage interface board of a LHAASO-WFCTA prototype

technical field

The invention belongs to the technical field of high-voltage interface boards, and in particular relates to a detection device and a testing method for a high-voltage interface board of a LHAASO-WFCTA prototype.

Background technique

The Large High Altitude Air Shower Observatory (LHAASO) is a major scientific and technological infrastructure with the core goal of cosmic ray observation and research. Wide-field Atmospheric Fluorescence/Cherenkov Photodetector Array (WFCTA) is one of the main detectors of the LHAASO project. Its main physical goal is to cooperate with other detectors to accurately measure the energy spectrum of cosmic rays from 1013 to 1018eV with multiple parameters and energy divisions. , to provide experimental evidence for the study of cosmic ray knee physics, and to solve the mystery of cosmic ray origin, acceleration and propagation. WFCTA consists of 16 wide-angle Cherenkov telescopes, each of which includes an optical system, a 32×32 photomultiplier tube (PMT) array, an electronic readout system, a slow control and monitoring system, a calibration system and six mechanical systems part. The calibration system uses two Cherenkov prototypes that he worked in Yangbajing. Each prototype is composed of 256 photomultipliers, of which every 16 photomultipliers form a small whole column, called a SubCluster, 12 The old SubClusters were unstable during the running of the prototype. According to the requirements of LHAASO-WFCTA for its calibration system, the electronic systems of these 12 SubClusters are now upgraded, and a high-voltage interface board is added, and then connected to the WFCTA same electronics system.

Contents of the invention

The object of the present invention is to aim at the deficiencies in the prior art, provide a kind of detection device and the testing method of the high-voltage interface board of LHAASO-WFCTA prototype, to solve the problem whether the circuit and resistance of the high-voltage interface board based on LHAASO-WFCTA prototype are connected.

For achieving the above object, the technical scheme that the present invention takes is:

Provide a detection device and testing method for a high-voltage interface board of a LHAASO-WFCTA prototype, which includes several circuit units arranged on the high-voltage interface board; several circuit units are arranged in parallel between the voltage test point and the grounding point; the circuit unit includes several Resistors and capacitors: Several resistors are connected in series; Capacitor C1 and capacitor C2 are connected in parallel to both ends of resistor R1; Capacitor C3 and capacitor C4 are connected in parallel to both ends of resistor R11; Capacitor C5 is connected in parallel to both ends of resistor R13.

Preferably, sixteen circuit units are arranged in parallel on the high-voltage interface board.

Preferably, each circuit unit includes fourteen serially connected resistors.

A method for testing the detection device of the high-voltage interface board of the LHAASO-WFCTA prototype, comprising:

According to the distribution position of the resistance in the circuit unit of the high-voltage interface board, select the node for the resistance test;

The resistance value of the node and the node voltage are tested respectively by the method of directly measuring resistance and the method of stabilizing the power supply.

Preferably, the selection of nodes is:

In the circuit unit, the endpoint between resistors R1 and R2 is selected as node 1, the endpoint between resistors R2 and R3 is node 2, the endpoint between resistors R5 and R6 is node 3, and the endpoint between resistors R7 and R8 is Node 4, the endpoint between resistors R9 and R10 is node 5, the endpoint between resistors R11 and R12 is node 6, the endpoint between resistors R12 and R13 is node 7, and the endpoint between resistors R10 and R11 is node 8 , the endpoint between resistors R13 and R14 is node 9.

Preferably, the method of directly measuring the resistance and the regulated power supply method to test the resistance value and voltage is as follows: connect the red pen of the multimeter to the voltage test point, and connect the black pen to the nine nodes respectively.

Preferably, the resistance values or voltages tested by the nine nodes are:

Node 1 tests the resistance or voltage of resistor R1, node 2 tests the resistance or voltage of resistor R1+R2, node 3 tests the resistance or voltage of resistor R1+R2+R3+R4+R5+R6, and node 4 tests resistor R1 The resistance or voltage of +R2+R3+R4+R5+R6+R7, the resistance or voltage of node 5 test resistor R1+R2+R3+R4+R5+R6+R7+R8, the node 6 test resistance R1+R2 Resistance or voltage of +R3+R4+R5+R6+R7+R8+R9+R10+R11, node 7 test resistance R1+R2+R3+R4+R5+R6+R7+R8+R9+R10+R11+ The resistance or voltage of R12, the resistance or voltage of node 8 test resistor R1+R2+R3+R4+R5+R6+R7+R8+R9+R10, the node 9 test resistance R1+R2+R3+R4+R5+ The resistance or voltage of R6+R7+R8+R9+R10+R11+R12+R13.

The detection device and testing method of the high-voltage interface board of the LHAASO-WFCTA prototype provided by the present invention have the following beneficial effects:

According to the distribution position of the resistance and capacitance on the high-voltage interface board, the present invention selects the nodes of the unit circuit, and uses the method of directly measuring resistance and the method of stabilizing the power supply to test the resistance value and node voltage of the nodes, thereby simply judging the high-voltage interface Whether the circuit board is connected.

Description of drawings

Figure 1 is a circuit diagram of the structure of the high-voltage interface board based on the LHAASO-WFCTA prototype.

Fig. 2 is a comparison chart of the test divided voltage value ratio and the theoretical divided voltage value ratio of the detection device and test method of the high voltage interface board of the LHAASO-WFCTA prototype.

Detailed ways

The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

According to one embodiment of the present application, as shown in Figure 1, the detection device and testing method of the high-voltage interface board of the LHAASO-WFCTA prototype of this program include sixteen circuit units arranged on the high-voltage interface board; each circuit unit Set in parallel between the voltage test point and the ground point.

The circuit unit includes fourteen resistors and capacitors, the fourteen resistors are connected in series, the capacitor C1 and the capacitor C2 are connected in parallel at both ends of the resistor R1, the capacitor C3 and the capacitor C4 are connected in parallel at both ends of the resistor R11, and the capacitor C5 is connected in parallel at both ends of the resistor R13 , wherein, the specific values of the respective resistors and capacitors refer to FIG. 1 .

According to an embodiment of the present application, a method for testing a high-voltage interface board based on the LHAASO-WFCTA prototype.

Select the resistance test node according to the distribution position of the resistance in the circuit unit of the high voltage interface board:

In the circuit unit, the endpoint between resistors R1 and R2 is selected as node 1, the endpoint between resistors R2 and R3 is node 2, the endpoint between resistors R5 and R6 is node 3, and the endpoint between resistors R7 and R8 is node 4. The endpoint between resistors R9 and R10 is node 5, the endpoint between resistors R11 and R12 is node 6, the endpoint between resistors R12 and R13 is node 7, and the endpoint between resistors R10 and R11 is node 8. The endpoint between resistors R13 and R14 is node 9 .

Direct resistance measurement method to test resistance value

Select a multimeter for testing, adjust the multimeter to the ohm range, connect the red test lead to the VCC terminal of the circuit unit, and connect the black test lead to nine nodes respectively, and record the resistance value of each node after stabilization. Among them, node 1 tests the resistance value of resistor R1, node 2 tests the resistance value of resistor R1+R2, node 3 tests the resistance value of resistor R1+R2+R3+R4+R5+R6, node 4 tests resistor R1+R2+R3 The resistance value of +R4+R5+R6+R7, the resistance value of node 5 test resistance R1+R2+R3+R4+R5+R6+R7+R8, the resistance value of node 6 test resistance R1+R2+R3+R4+R5+R6 The resistance value of +R7+R8+R9+R10+R11, the resistance value of node 7 test resistance R1+R2+R3+R4+R5+R6+R7+R8+R9+R10+R11+R12, the resistance value of node 8 test resistance R1 Resistance of +R2+R3+R4+R5+R6+R7+R8+R9+R10, node 9 test resistance R1+R2+R3+R4+R5+R6+R7+R8+R9+R10+R11+R12+ The resistance value of R13.

The test results are as follows:

It can be seen from the above table that with the increase of the number of nodes, the difference between the test value and the theoretical value is increasing. This is mainly because the gain adjustment resistors used are ordinary resistors, and the production process itself leads to large errors; In theory, the DC resistance is infinite in theory, but in fact, when the parallel capacitance is also large, it will have a greater impact on the resistance of the circuit, which will make the measured value smaller. The circuit contains capacitance, and there is a charging process during the test. Therefore, it takes some time for the reading to stabilize.

Test the resistance voltage by the regulated power supply method:

Select a 15V regulated power supply, adjust the multimeter to the DC voltage range, connect the red test leads to the VCC terminal of the unit circuit, and connect the black test leads to nine nodes respectively, and record the voltage values of each node after stabilization. Among them, node 1 tests the voltage value of resistor R1, node 2 tests the voltage value of resistor R1+R2, node 3 tests the voltage value of resistor R1+R2+R3+R4+R5+R6, and node 4 tests resistor R1+R2+R3 +R4+R5+R6+R7 voltage value, node 5 test resistor R1+R2+R3+R4+R5+R6+R7+R8 voltage value, node 6 test resistor R1+R2+R3+R4+R5+R6 +R7+R8+R9+R10+R11 voltage value, node 7 test resistor R1+R2+R3+R4+R5+R6+R7+R8+R9+R10+R11+R12 voltage value, node 8 test resistor R1 +R2+R3+R4+R5+R6+R7+R8+R9+R10 voltage value, node 9 test resistance R1+R2+R3+R4+R5+R6+R7+R8+R9+R10+R11+R12+ The voltage value of R13.

The test results are shown in the table below:

It can be seen from the above table that this test method is based on the principle of resistor series voltage division, and the capacitor is connected in parallel in the circuit, which has little effect on the test voltage at both ends of the resistor; and the reading stabilizes quickly.

Continue to compare the voltage division ratio of the voltage measurement value of the 16 unit circuits on the high-voltage interface board with the theoretical value. fyb" is the voltage division ratio of each node, and "llz" is the theoretical value. In Figure 2, the difference between the test voltage division value ratio and the theoretical voltage division value ratio is small, indicating that the high-voltage interface board after welding is working normally, that is, the high-voltage interface is judged Board wiring is connected.

According to the distribution position of the resistance and capacitance on the high-voltage interface board, the present invention selects the nodes of the unit circuit, and uses the method of directly measuring resistance and the method of stabilizing the power supply to test the resistance value and node voltage of the nodes, thereby simply judging the high-voltage interface Whether the circuit board is connected.

Although the specific embodiment of the invention has been described in detail in conjunction with the accompanying drawings, it should not be construed as limiting the scope of protection of this patent. Within the scope described in the claims, various modifications and deformations that can be made by those skilled in the art without creative efforts still belong to the protection scope of this patent.

Claims (7)

1. a detection device of the high-voltage interface board of a LHAASO-WFCTA prototype, it is characterized in that: comprise some circuit units arranged on the high-voltage interface board; Some described circuit units are arranged in parallel between the voltage test point and the grounding point; Said circuit unit comprises several resistors and capacitors; several said resistors are connected in series; said capacitor C1 and capacitor C2 are connected in parallel at both ends of resistor R1; said capacitor C3 and capacitor C4 are connected in parallel at both ends of resistor R11; said capacitor C5 is connected in parallel at both ends of resistor R13. 2. The detection device of the high-voltage interface board of the LHAASO-WFCTA prototype according to claim 1, characterized in that: sixteen circuit units are arranged in parallel on the high-voltage interface board. 3. The detecting device of the high-voltage interface board of the LHAASO-WFCTA prototype according to claim 1, characterized in that: each said circuit unit includes fourteen resistors connected in series in sequence. 4. a test method adopting the detection device of the high-voltage interface board of the arbitrary described LHAASO-WFCTA prototype of claim 1-3, is characterized in that, comprises: According to the distribution position of the resistance in the circuit unit of the high-voltage interface board, select the node for the resistance test; The resistance value of the node and the node voltage are tested respectively by the method of directly measuring resistance and the method of stabilizing the power supply. 5. the testing method of the detection device of the high voltage interface board of the LHAASO-WFCTA prototype according to claim 4, is characterized in that, the selection of described node is: In the circuit unit, the endpoint between resistors R1 and R2 is selected as node 1, the endpoint between resistors R2 and R3 is node 2, the endpoint between resistors R5 and R6 is node 3, and the endpoint between resistors R7 and R8 is Node 4, the endpoint between resistors R9 and R10 is node 5, the endpoint between resistors R11 and R12 is node 6, the endpoint between resistors R12 and R13 is node 7, and the endpoint between resistors R10 and R11 is node 8 , the endpoint between resistors R13 and R14 is node 9. 6. the method for testing the detection device of the high-voltage interface board of the LHAASO-WFCTA prototype according to claim 4, it is characterized in that: the method for directly measuring resistance method and voltage-stabilized power supply method test resistance resistance value and voltage is: The red test leads of the multimeter are connected to the voltage test point, and the black test leads are respectively connected to nine nodes. 7. the testing method of the detection device of the high-voltage interface board of the LHAASO-WFCTA prototype according to claim 6, it is characterized in that, the resistance resistance or the voltage that nine described nodes test respectively are: Node 1 tests the resistance or voltage of resistor R1, node 2 tests the resistance or voltage of resistor R1+R2, node 3 tests the resistance or voltage of resistor R1+R2+R3+R4+R5+R6, and node 4 tests resistor R1 The resistance or voltage of +R2+R3+R4+R5+R6+R7, the resistance or voltage of node 5 test resistor R1+R2+R3+R4+R5+R6+R7+R8, the node 6 test resistance R1+R2 Resistance or voltage of +R3+R4+R5+R6+R7+R8+R9+R10+R11, node 7 test resistance R1+R2+R3+R4+R5+R6+R7+R8+R9+R10+R11+ The resistance or voltage of R12, the resistance or voltage of node 8 test resistor R1+R2+R3+R4+R5+R6+R7+R8+R9+R10, the node 9 test resistance R1+R2+R3+R4+R5+ The resistance or voltage of R6+R7+R8+R9+R10+R11+R12+R13.