CN101738270B - Multi-point ground temperature measurement system for ground source heat pump system - Google Patents

Abstract

A multi-point ground temperature measurement system used for a ground source heat pump system belongs to the technical field of ground temperature measurement. It is characterized in that the input end of the computer is connected to the output end of the one-line digital measurement and control instrument; each output end of n single-bus digital temperature sensors fixed in the buried pipe is respectively connected with each input end of the one-line digital measurement and control instrument, and the one-line digital measurement and control instrument The instrument collects the information of the single-bus digital temperature sensor and displays the collected temperature value; the computer reads the temperature value of the first-line digital measurement and control instrument and records the temperature data. The invention realizes multi-point simultaneous ground temperature measurement, with simple structure and simple lines; the temperature sensor is placed in the buried pipe, and no special drilling is required for actual ground temperature measurement, which saves cost; the sensor can be recalibrated, used repeatedly, and measured at different locations ,save costs.

Description

Multi-point ground temperature measurement system for ground source heat pump system

technical field

The invention belongs to the technical field of ground temperature measurement, and in particular relates to a multi-point ground temperature measurement system for a ground source heat pump system and a fixing frame thereof.

Background technique

The existing multi-point ground temperature measurement system has many lines. For example, a 10-point ground temperature measurement system needs 10 temperature sensors, each temperature sensor needs at least 2 wires, and the system needs more than 20 wires, which makes the system complicated. Moreover, the sensors of the existing ground temperature measurement system are mostly buried in the soil, and cannot be taken out and reused.

Contents of the invention

The purpose of the present invention is to overcome the above-mentioned defects of the existing multi-point ground temperature measurement system, and provide a multi-point ground temperature measurement system used in the field of ground source heat pump systems.

The present invention is characterized in that the input end of the computer is connected to the output end of the one-line digital measurement and control instrument; each output end of n single-bus digital temperature sensors fixed in the buried pipe is respectively connected with each input end of the one-line digital measurement and control instrument, and the one-line digital The measurement and control instrument collects the information of the single-bus digital temperature sensor and displays the collected temperature value; the computer reads the temperature value of the first-line digital measurement and control instrument and records the temperature data.

The number of the single-wire digital temperature sensors is 1<n≤100.

The outer wall of the buried pipe is fixed with a steel plate, and the magnetic bracket is installed on the side of the buried pipe close to the steel plate; the magnetic bracket is provided with a through hole of Φ6mm-10mm, and the n single-bus digital temperature sensors are evenly spaced from top to bottom. The bottom is fixed in the through hole of Φ6mm-10mm.

The present invention has the following advantages:

(1) Due to the selection of a single-bus digital temperature sensor, the system can connect multiple temperature sensors in parallel to realize multi-point simultaneous ground temperature measurement, and the structure is simple and the circuit is simple;

(2) Since the temperature sensor is placed in the buried pipe for measurement, there is no need to drill a well when actually measuring the ground temperature, which saves costs; if necessary, after the measurement is completed, the sensor can be pulled out and used repeatedly to measure at different locations;

(3) The sensor can be recalibrated and used all year round; the system uses Kingview software for real-time monitoring and automatically records temperature data.

Description of drawings

Fig. 1 is a schematic diagram of the composition of the multi-point geothermal measurement system;

Figure 2 is a schematic diagram of the placement of the buried pipe and the single-bus digital temperature sensor.

Labels in the figure:

1-computer; 2-line digital measurement and control instrument; 3-single-bus digital temperature sensor; 4-buried pipe; 5-steel plate; 6-magnetic bracket.

Detailed ways

The present invention provides a multi-point ground temperature measurement system and its fixing frame used in the field of ground source heat pump systems. The present invention will be further described below in conjunction with the description of the drawings and specific implementation methods.

Figure 1 is a schematic diagram of the multi-point geothermal measurement system. The input terminal of computer 1 is connected with the output terminal of one-line digital measuring and controlling instrument 2 through 485 bus; line connection. The first-line digital measurement and control instrument 2 collects information from the single-bus digital temperature sensor 3 and displays the collected temperature value; the computer 1 reads the temperature value of the first-line digital measurement and control instrument and records the temperature data. Among them, the single-bus digital temperature sensor 3 adopts DS1820S, which realizes the single-bus connection with the measurement and control instrument, which greatly saves the number of connection lines; DS1820S consumes very little power in the test line. Short-circuit VDD and GND to save wiring and no additional power supply. The first-line digital measurement and control instrument 2 adopts DZT-100B, and the computer 1 is Lenovo (IBM) ThinkPad T400 notebook computer.

When the multi-point geothermal measurement system works, the steps are as follows:

The first step, drilling: the drilling depth is 100 meters;

The second step is to fix the sensor in the buried pipe: a steel plate is welded on the outer wall of the DN32 buried pipe 4, and the magnetic bracket 6 is welded on the side of the buried pipe 4 close to the steel plate 5; Holes; 20 single-bus digital temperature sensors 3, every two at an interval of 5m, are fixed in the through holes of the magnetic support 6 with screws; the schematic diagram of the placement position of the buried pipe and the single-bus digital temperature sensor is shown in Figure 2;

The third step is to place the buried pipe 4 with the single-bus digital temperature sensor 3 into the drilled hole, and backfill the drilled hole;

The fourth step is to connect the first-line digital measurement and control instrument DZT-100B and Lenovo (IBM) ThinkPad T400 notebook computer to collect data.

Claims (2)

1. The multi-point ground temperature measurement system for ground source heat pump systems is characterized in that the input end of the computer (1) is connected to the output end of the first-line digital measurement and control instrument (2); Each output end of a single-bus digital temperature sensor (3) is connected with each input end of a one-line digital measuring and controlling instrument (2) respectively, and the one-line digital measuring and controlling instrument (2) collects the information of the single-bus digital temperature sensor (3), and displays and collects The temperature value received; the computer (1) reads the temperature value of the first-line digital measuring and controlling instrument and records the temperature data; The outer wall of the buried pipe (4) is fixed with a steel plate (5), and the magnetic support (6) is installed on the side of the buried pipe (4) close to the steel plate (5); the magnetic support (6) is provided with a Φ6mm-10mm through-holes, and the n single-bus digital temperature sensors (3) are evenly spaced and fixed in the through-holes of Φ6mm-10mm from top to bottom. 2. The multi-point ground temperature measurement system for a ground source heat pump system according to claim 1, characterized in that the number of said single-bus digital temperature sensors (3) is 1<n≤100.

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