A method for determining the position of a metering and control module suitable for intelligent DC metering and control equipment

Abstract

The present invention relates to the field of electronic equipment calibration technology, and discloses a method for determining the position of a metering and control module applicable to intelligent DC metering and control equipment, and the steps are as follows: the metering and control module determines a reference voltage value according to an input voltage; the metering and control module calculates a single voltage-dividing resistor voltage-dividing value according to the reference voltage value; the metering and control module determines the current slot number of itself according to the current slot voltage value and the single voltage-dividing resistor voltage-dividing value; the metering and control module automatically addresses itself according to the current slot number of itself. The present invention allows the metering and control module to sample the voltage of the voltage-dividing circuit as a reference value, realizes a reasonable calibration of the voltage-dividing value of a single voltage-dividing resistor, calculates the slot number according to the actual relationship between the slot voltage value and the reference voltage value, and makes the calculation not affected by the inaccurate voltage-dividing voltage, thereby ensuring the accuracy of the position determination of the metering and control module, and providing a strong guarantee for the normal operation of the intelligent DC metering and control equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic equipment calibration, and in particular to a method for determining the position of a metering and control module applicable to intelligent direct current metering and control equipment. Background Art

[0002] Intelligent DC metering and control equipment is a device with DC power metering function. It provides a variety of metering and control modules, mainly used for communication base station branch metering. It can realize the on-off control of communication base station load power supply according to certain strategies. This type of equipment is in the form of a main control plus multiple metering and control modules, and each metering and control module can be plugged in and out at will. After the metering and control module is inserted, the main control will communicate with it, so the metering and control module needs to determine its own device address after insertion. In this regard, voltage divider resistors are usually used to provide a voltage divider voltage to each metering and control module insertion slot. The metering and control module determines the slot where it is inserted based on the sampled voltage value and the theoretical single resistor voltage divider value. However, due to the non-ideality of the circuit, environmental noise and other factors, the actual voltage division situation often has errors with the theoretical value, resulting in inaccurate position judgment of the metering and control module. Summary of the invention

[0003] In view of the shortcomings and defects of the prior art, the present invention provides a method for determining the position of a metering and control module suitable for intelligent DC metering and control equipment, wherein the metering and control module samples the voltage of the voltage divider circuit as a reference value, thereby realizing reasonable calibration of the voltage divider value of a single voltage divider resistor, and calculating the slot number according to the actual relationship between the slot voltage value and the reference voltage value, so that the calculation is not affected by inaccurate voltage divider voltage, thereby ensuring the accuracy of the position determination of the metering and control module.

[0004] The purpose of the present invention can be achieved through the following technical solutions.

[0005] A method for determining the position of a metering and control module applicable to an intelligent DC metering and control device comprises the following steps:

[0006] S1, the measurement and control module determines the reference voltage value according to the input voltage;

[0007] S2, the measurement and control module calculates the voltage dividing value of a single voltage dividing resistor according to the reference voltage value;

[0008] S3, the measurement and control module determines the current slot number of itself according to the voltage value of the current slot and the voltage dividing value of a single voltage dividing resistor;

[0009] S4, the metering and control module is automatically addressed according to its current slot number.

[0010] The beneficial technical effects of the present invention are as follows: the metering and control module samples the voltage of the voltage-dividing circuit as a reference value, thereby realizing reasonable calibration of the voltage-dividing value of a single voltage-dividing resistor, and calculating the slot number according to the actual relationship between the slot voltage value and the reference voltage value, so that the calculation is not affected by inaccurate voltage-dividing voltage, thereby ensuring the accuracy of the position judgment of the metering and control module, and providing a strong guarantee for the normal operation of the intelligent DC metering and control equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 4 is a circuit diagram of an embodiment of the present invention.

[0012] Figure 2 It is an overall flow chart of an embodiment of the present invention. DETAILED DESCRIPTION

[0013] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not limit the present invention.

[0014] Example: Comparison of conventional method and this method under the same conditions:

[0015] The current conventional method is usually to use the theoretical reference voltage value to calculate the theoretical single resistor voltage divider value. After the metering and control module is inserted, it samples the voltage value of the current slot and determines the current slot number according to the range of the value.

[0016] by Figure 1 Taking the device shown as an example, the theoretical reference voltage value is 12V. The device has 23 slots and 24 10K resistors. The theoretical voltage division value of each 10K resistor is 12÷((10×24+360)÷10)=0.2V.

[0017] In fact, the error of the three-terminal linear regulator is generally around 5%, and the actual voltage value is 12.6V, that is, the actual voltage division value of each 10K resistor is 12.6÷((10×24+360)÷10)=0.21V.

[0018] Based on this, the actual collected voltage value of slot No. 20 is 0.21×20=4.2V.

[0019] Use 4.2V to calculate the current slot number: (4.2÷0.2)=21. The calculated measurement and control module is inserted into slot 21, not slot 20 as it is actually inserted into.

[0020] The above only considers the error of the voltage regulator. If the sampling error is considered, the error will be greater and the result will be more inaccurate. In actual use, in order to minimize the contact signal between the metering and control module and the main control, the supply voltage is usually used as the total voltage of the voltage divider circuit, which makes it even more difficult to guarantee the accuracy of the voltage value.

[0021] In order to solve the above problems, the present invention designs the following optimization scheme to ensure that the metering and control module can accurately know the current slot number of itself:

[0022] like Figures 1-2 As shown, ADC1 of SM8103ADC is used to sample the input reference voltage, and ADC2 is used to sample the voltage value of the current slot. This method includes the following steps:

[0023] S1, the measurement and control module samples the input voltage and determines the reference voltage value of 12.6V;

[0024] S2, the slot voltage value sampled and input by the metering and control module is 4.2V;

[0025] S3, the measurement and control module calculates the actual voltage division value of each 10K resistor: 12.6÷((10×24+360)÷10)=0.21V;

[0026] S4, the measurement and control module calculates the current slot number: 4.2 / 0.21=21; (if the result obtained in this step is not an integer, the measurement and control module rounds the result to obtain the slot number);

[0027] S5, the metering and control module confirms its own protocol address according to its current slot number, and realizes protocol interaction with the main control.

[0028] In summary, this method realizes the reasonable calibration of the voltage-dividing value of a single voltage-dividing resistor, ensures the accuracy of the position judgment of the metering and control module, and provides a strong guarantee for the normal operation of the intelligent DC metering and control equipment. Compared with the conventional method, the technical effect is better. At the same time, this method has strong versatility and practicality, and is not only suitable for intelligent DC metering and control equipment, but also can be widely used in various electronic devices that need to calibrate the voltage-dividing value of a single resistor.

[0029] The above embodiments are descriptions of specific implementation methods of the present invention rather than limitations of the present invention. Technical personnel in the relevant technical field may make various changes and modifications to obtain corresponding equivalent technical solutions without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should be included in the patent protection scope of the present invention.

Claims

1. A method for determining the position of a metering and control module applicable to intelligent DC metering and control equipment, characterized in that: The following steps are involved: S1, the measurement and control module determines the reference voltage value according to the input voltage; S2, the measurement and control module calculates the voltage dividing value of a single voltage dividing resistor according to the reference voltage value; S3, the measurement and control module determines the current slot number of itself according to the voltage value of the current slot and the voltage dividing value of a single voltage dividing resistor; S4, the metering and control module is automatically addressed according to its current slot number.

Images