CN214793542U - Calorimeter detection and inspection device - Google Patents
Calorimeter detection and inspection device Download PDFInfo
- Publication number
- CN214793542U CN214793542U CN202121022869.8U CN202121022869U CN214793542U CN 214793542 U CN214793542 U CN 214793542U CN 202121022869 U CN202121022869 U CN 202121022869U CN 214793542 U CN214793542 U CN 214793542U
- Authority
- CN
- China
- Prior art keywords
- resistor
- operational amplifier
- output end
- capacitor
- temperature sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The utility model discloses a heat meter detection and inspection device, which comprises a circulating water tank and a controller, wherein a heater and a temperature sensor are arranged in the circulating water tank, the collected signal of the temperature sensor is processed by a signal conditioning circuit and then sent into the controller, the signal conditioning circuit comprises a conveying device U1 and a U2, the conveying device U1 and the U2 form a differential amplifier, the input end of the differential amplifier is connected with the signal output end of the temperature sensor through a filter unit, the output end of the differential amplifier is connected with the input end of an A/D converter through an emitter following voltage stabilizing unit, and the output end of the A/D converter is connected with the controller. The stability of the detection environment of the heat meter and the accuracy of detection are ensured.
Description
Technical Field
The utility model relates to a calorimeter examination equipment technical field especially relates to a calorimeter detects verifying attachment.
Background
The heat meter detection and inspection device can perform component inspection on various heat meters, such as flow sensors, paired temperature sensors and calculators, and total amount inspection on the heat meters. The flow is adjusted to a set flow point by adjusting the rotating speed of a flow adjusting valve and a variable frequency water pump, a standard thermometer and a temperature sensor of a to-be-detected meter are respectively arranged in two constant temperature water tanks (simulating the inlet and outlet temperatures), the detection is started after the system runs stably, a computer collects signals related to the flow, the temperature and the like in the detection process, the detection is stopped after the system runs for a period of time, and the standard heat value in the detection period is automatically calculated by the computer according to a related thermodynamic formula. And the verification test of the detected meter is realized by comparing and calculating the standard heat value and the heat indicating value of the detected meter. However, in the actual operation process, the temperature of the circulating water changes along with the actual change, and is limited by the signal feedback and slow response speed of the standard thermometer and the interference of the external environment, so that the output signal of the standard thermometer deviates from the actual value, the detection result of the calorimeter also deviates, and the accuracy of flow measurement of the calorimeter is affected.
So the utility model provides a new scheme to solve the problem.
SUMMERY OF THE UTILITY MODEL
To the above situation, in order to overcome the defects of the prior art, the present invention aims to provide a heat meter detection and inspection device.
The technical scheme for solving the problem is as follows: the heat meter detection and inspection device comprises a circulating water tank and a controller, wherein a heater and a temperature sensor are arranged in the circulating water tank, collected signals of the temperature sensor are processed by a signal conditioning circuit and then sent into the controller, the signal conditioning circuit comprises an operational amplifier U1 and a U2, the operational amplifier U1 and the U2 form a differential amplifier, the input end of the differential amplifier is connected with the signal output end of the temperature sensor through a filtering unit, the output end of the differential amplifier is connected with the input end of an A/D converter through an emitter following voltage stabilizing unit, and the output end of the A/D converter is connected with the controller.
Preferably, the filtering unit comprises a resistor R1, one point of the resistor R1 is connected to a signal output end of the temperature sensor, the other end of the resistor R is connected to one end of a resistor R3 and an inductor L1, and is grounded through a capacitor C1 and a resistor R2 which are connected in parallel, the other end of the resistor R3 is connected to an inverting input end of an operational amplifier U1, the other end of the inductor L1 is connected to an inverting input end of the operational amplifier U2 through a capacitor C3, and is connected to an output end of the operational amplifier U2 through a rheostat RP 1.
Preferably, the emitter follower voltage stabilizing unit comprises a triode T1, a collector of the triode T1 is connected with an output end of the operational amplifier U2, a base of the triode T1 is connected with one end of a resistor R5 and a cathode of a zener diode DZ1, an anode of the zener diode DZ1 is grounded, the other end of the resistor R5 is connected with an output end of the operational amplifier U1 and is grounded through a capacitor C4, an emitter of the triode T1 is connected with one end of a resistor R6 and an input end of the a/D converter, and the other end of the resistor R6 is grounded through a capacitor C5.
Preferably, the non-inverting input terminal of the op amp U1 is also grounded through a resistor R4 and a capacitor C2 connected in parallel.
Through the technical scheme, the beneficial effects of the utility model are that: the utility model discloses a set up signal conditioning circuit and handle temperature sensor's collection signal, suppress external clutter well to the interference of temperature acquisition signal, improve signal processing efficiency and precision to the response speed of lift system guarantees the stability of calorimeter testing environment and the accuracy of inspection.
Drawings
Fig. 1 is a schematic diagram of the signal conditioning circuit of the present invention.
Detailed Description
The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying fig. 1. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
The heat meter detection and inspection device comprises a circulating water tank and a controller, wherein a heater and a temperature sensor J1 are arranged in the circulating water tank, collected signals of the temperature sensor J1 are processed by a signal conditioning circuit and then are sent into the controller, the signal conditioning circuit comprises an operational amplifier U1 and an operational amplifier U2, the operational amplifier U1 and the operational amplifier U2 form a differential amplifier, the input end of the differential amplifier is connected with the signal output end of the temperature sensor J1 through a filtering unit, the output end of the differential amplifier is connected with the input end of an A/D converter through an emitter following voltage stabilizing unit, and the output end of the A/D converter is connected with the controller.
The filter unit comprises a resistor R1, one point of a resistor R1 is connected with a signal output end of the temperature sensor J1, the other end of the resistor R is connected with one end of a resistor R3 and one end of an inductor L1 and is grounded through a capacitor C1 and a resistor R2 which are connected in parallel, the other end of the resistor R3 is connected with an inverting input end of an operational amplifier U1, the other end of the inductor L1 is connected with an inverting input end of an operational amplifier U2 through the capacitor C3 and is connected with an output end of an operational amplifier U2 through a rheostat RP 1.
The emitter follower voltage stabilizing unit comprises a triode T1, the collector of the triode T1 is connected with the output end of an operational amplifier U2, the base of the triode T1 is connected with one end of a resistor R5 and the cathode of a voltage stabilizing diode DZ1, the anode of the voltage stabilizing diode DZ1 is grounded, the other end of the resistor R5 is connected with the output end of the operational amplifier U1 and is grounded through a capacitor C4, the emitter of the triode T1 is connected with one end of a resistor R6 and the input end of the A/D converter, and the other end of the resistor R6 is grounded through a capacitor C5.
The utility model discloses a concrete theory of operation does: the temperature sensor J1 collects the water temperature in the circulating water tank in real time, and the collected signal is sent to the signal conditioning circuit in the form of electric signal for processing. The resistor R1 and the capacitor C1 in the filtering unit form RC filtering to perform low-pass noise reduction on the acquired signal, so that external high-frequency clutter interference is effectively eliminated. Signals after RC filtering are respectively sent to the inverting input ends of the operational amplifiers U1 and U2 in two paths, the two paths of signals are amplified by using the principle of a differential amplifier, the amplification efficiency of collected signals is greatly improved, common mode influence is eliminated, the operational amplifier effect is improved, LC filtering is formed by the inductor L1 and the capacitor C3 in the operational amplifier process to eliminate clutter influence, and differential amplification precision is greatly guaranteed. Meanwhile, the non-inverting input end of the operational amplifier U1 is grounded through a resistor R4 and a capacitor C2 which are connected in parallel, and the capacitor C2 serves as a bypass capacitor of a resistor R4 at the non-inverting input end of the operational amplifier U1, so that the thermal noise suppression effect is good when the operational amplifier U1 operates, and the signal processing precision of the differential amplifier is further ensured.
The signal processed by the differential amplifier is sent to the emitter following voltage stabilizing unit, wherein the triode T1 is used as an emitter follower to further enhance the output signal of the differential amplifier, thereby greatly improving the signal processing effect and further improving the response speed of the system. The voltage stabilizing diode DZ1 plays a reference role at the base of the triode T1, and the signal output amplitude is ensured to be stable. Finally, the acquired signals are converted into digital quantity by the A/D converter and then sent into the controller. The controller adjusts the working state of the heater in real time according to the detected value of the water temperature in the circulating water tank, so that the water temperature is always consistent with the standard set temperature.
To sum up, the utility model discloses a set up signal conditioning circuit and handle temperature sensor's collection signal, restrain external clutter well to the interference of temperature acquisition signal, improve signal processing efficiency and precision to the response speed of lifting system guarantees calorimeter testing environment's stability and the accuracy of inspection.
The above description is provided for further details of the present invention with reference to the specific embodiments, which should not be construed as limiting the present invention; to the utility model discloses affiliated and relevant technical field's technical personnel are based on the utility model discloses under the technical scheme thinking prerequisite, the extension of doing and the replacement of operating method, data all should fall within the utility model discloses within the protection scope.
Claims (4)
1. Calorimeter detects verifying attachment, including circulation tank and controller, sets up heater and temperature sensor in the circulation tank, its characterized in that: the signal conditioning circuit comprises an operational amplifier U1 and a U2, the operational amplifier U1 and the U2 form a differential amplifier, the input end of the differential amplifier is connected with the signal output end of the temperature sensor through a filtering unit, the output end of the differential amplifier is connected with the input end of an A/D converter through an emitter following voltage stabilizing unit, and the output end of the A/D converter is connected with the controller.
2. The calorimeter detection and inspection device of claim 1, wherein: the filter unit comprises a resistor R1, one point of the resistor R1 is connected with a signal output end of the temperature sensor, the other end of the resistor R is connected with one end of a resistor R3 and one end of an inductor L1 and is grounded through a capacitor C1 and a resistor R2 which are connected in parallel, the other end of the resistor R3 is connected with an inverting input end of an operational amplifier U1, the other end of the inductor L1 is connected with an inverting input end of the operational amplifier U2 through a capacitor C3 and is connected with an output end of the operational amplifier U2 through a rheostat RP 1.
3. The calorimeter detection and inspection device of claim 2, wherein: the emitter follower voltage stabilizing unit comprises a triode T1, the collector of a triode T1 is connected with the output end of an operational amplifier U2, the base of the triode T1 is connected with one end of a resistor R5 and the cathode of a voltage stabilizing diode DZ1, the anode of a voltage stabilizing diode DZ1 is grounded, the other end of a resistor R5 is connected with the output end of the operational amplifier U1 and is grounded through a capacitor C4, the emitter of the triode T1 is connected with one end of a resistor R6 and the input end of the A/D converter, and the other end of the resistor R6 is grounded through a capacitor C5.
4. The calorimeter detection and inspection device of claim 3, wherein: the non-inverting input terminal of the operational amplifier U1 is also grounded through a resistor R4 and a capacitor C2 which are connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121022869.8U CN214793542U (en) | 2021-05-13 | 2021-05-13 | Calorimeter detection and inspection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121022869.8U CN214793542U (en) | 2021-05-13 | 2021-05-13 | Calorimeter detection and inspection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214793542U true CN214793542U (en) | 2021-11-19 |
Family
ID=78693036
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121022869.8U Active CN214793542U (en) | 2021-05-13 | 2021-05-13 | Calorimeter detection and inspection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214793542U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114801465A (en) * | 2022-01-08 | 2022-07-29 | 河南宝钢制罐有限公司 | Printing quality control system for pop-top can |
-
2021
- 2021-05-13 CN CN202121022869.8U patent/CN214793542U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114801465A (en) * | 2022-01-08 | 2022-07-29 | 河南宝钢制罐有限公司 | Printing quality control system for pop-top can |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209069345U (en) | Multi-parameters sampling circuit | |
| CN204613137U (en) | Air-anion concentration detector | |
| CN106679841A (en) | Temperature detecting device and temperature detecting method | |
| CN214793542U (en) | Calorimeter detection and inspection device | |
| CN103913249A (en) | Temperature monitoring circuit device and method | |
| CN214681664U (en) | Liquid anti-oxidant reation kettle temperature control device | |
| CN202886471U (en) | Multi-channel leakage current phase difference detection equipment | |
| CN105865555B (en) | A kind of high temperature resistance analog drive circuit of Coriolis mass flowmeter | |
| CN217278703U (en) | Cable thermal ageing case temperature control system | |
| CN107014452A (en) | The flow sensing circuit of constant difference thermal flow rate sensor | |
| CN212082472U (en) | Precision type intelligent vortex shedding flowmeter | |
| CN108680210B (en) | Transient electromagnetic flow transmitter based on voltage and current differential | |
| CN107764889B (en) | Gas-solid two-phase flow dust carbon content measuring method based on signal energy method | |
| CN213274404U (en) | Thermal gas mass flowmeter | |
| CN216117610U (en) | Lubricating oil parameter detection device capable of simulating high temperature and high pressure | |
| CN210375233U (en) | Gas flowmeter temperature-detecting device | |
| CN213902484U (en) | Constant force bar flowmeter | |
| CN102062651B (en) | Dynamic detection method for temperature of heat meter | |
| CN208015697U (en) | A kind of signal processor for flow verification platform sensor | |
| CN207366229U (en) | Grain drying energy efficiency evaluation system | |
| CN210464573U (en) | Thermal gas mass flow meter | |
| CN213515815U (en) | Built-in battery type electromagnetic flowmeter | |
| CN205352478U (en) | Vortex street signal detection device based on DSP | |
| CN213274383U (en) | High-precision gas turbine flowmeter | |
| CN210638754U (en) | Intelligent gas waist wheel flowmeter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |